CN100398347C - Air automatic supply mechanism for pneumatic tires - Google Patents

Abstract

The present invention provides an automatic air supply mechanism for a pneumatic tire that can increase the amount of compressed air generated at a lower rotational speed of a wheel body and generate compressed air at a lower pressure. It is equipped with two compressed air generating units, a first compressed air generating unit (1a) and a second compressed air generating unit (1b), and a compressor for air tires that guides the compressed air generated by these compressed air generating units to pneumatic tires and supplies them. Air supply paths (2a), (2b). The first compressed air generating unit (1a) and the second compressed air generating unit (1b) are mounted on the hub shell of the hub at positions spaced apart from each other by 180° in the circumferential direction, and the first compressed air is generated during travel The part (1a) and the second compressed air generating part (1b) generate compressed air alternately.

Description

Air automatic supply mechanism for pneumatic tires

References to related applications

This application includes specification and claims by referring to Japanese Patent Application No. 2003 No. 090079 (filed on March 28, 2003) and international application PCT/JP/2003/015820 (international filing date on December 10, 2003). constitutes the full disclosure of the scope, drawings and abstract.

technical field

The present invention relates to an automatic air supply mechanism for a pneumatic tire capable of generating compressed air and supplying compressed air to the pneumatic tire when a wheel body rotates with respect to an axle.

Background technique

For example, the wheels of bicycles and automobiles are equipped with pneumatic tires that hold air. Even if air is supplied to this type of air tire to achieve a predetermined air pressure, air will gradually leak out over time and the air pressure will decrease. When the air pressure drop is large, the riding feeling will be deteriorated, and troubles such as difficult operation of the handle will be caused. Therefore, when the air pressure is lower than a predetermined pressure, it is necessary to supply air to the pneumatic tire by an air input device such as an air input pump.

However, when air is supplied to the pneumatic tire using, for example, an air input pump, considerable force is required in the operation of the air input pump. Therefore, there is a problem that it is difficult for a person with weak strength to operate the air input pump, and it is difficult to supply air.

Contents of the invention

The invention of the present application was made in view of the above circumstances, and its object is to provide an automatic air supply mechanism for a pneumatic tire that, even without using an air input pump, etc., when the air pressure of the pneumatic tire falls below a predetermined value, It is also possible to automatically supply the air to the air tire by utilizing the rotation of the air tire relative to the axle.

Another object of the present invention is to provide an automatic air supply mechanism for a pneumatic tire in which water such as rainwater is less likely to enter the compressed air generating unit.

Another object of the present invention is to provide an automatic air supply mechanism for an air tire that can increase the amount of compressed air generated at a lower rotational speed of the wheel body and generate compressed air at a lower pressure.

Another object of the present invention is to provide air that can generate a sufficient amount of compressed air in a relatively short travel distance and supply compressed air to pneumatic tires of vehicles such as wheelchairs that have a short travel distance and low wheel speed during normal travel. Air automatic supply mechanism for tires.

The object of the invention of the present application is also to provide an automatic air supply mechanism that can increase the amount of compressed air generated at a lower rotational speed of the wheel main body, and can generate compressed air with a smaller force. An automatic air supply mechanism that supplies air to air tires and supplies air to other parts of the vehicle other than air tires.

Another object of the present invention is to provide an automatic air supply mechanism for an air tire that can reduce the rotational resistance of the wheel body with respect to the axle.

The air automatic supply mechanism for a pneumatic tire of the present invention is an automatic air supply mechanism for an air tire that can automatically supply air to an air tire that is rotatably provided on the wheel main body relative to the axle of the vehicle. The compressed air generating unit that generates compressed air when the axle rotates can supply the compressed air generated in the compressed air generating unit to the pneumatic tires, and the compressed air generating unit has a compression chamber for compressing air for supplying external air The air inlet for inputting into the compression chamber, the waterproof mechanism for preventing water from entering the compression chamber from the air inlet, the wheel main body is equipped with a hub rotatably supported on the axle, and the compressed air generator is attached to the hub of the wheel main body Above, the waterproof mechanism is equipped with a first air passage that can ventilately communicate the air input port and the inside of the hub, and through the first air passage, air is input from the inside of the hub into the compression chamber to prevent water from entering the compressed air to generate department.

Although the characteristics of the present invention can be broadly indicated as described above, the configuration and content thereof will become more apparent from the following descriptions, taking the accompanying drawings into consideration together with the purpose and characteristics.

Description of drawings

FIG. 1 is a side view of a bicycle wheel having an automatic air supply mechanism according to Embodiment 1 of the present invention.

Fig. 2 is an enlarged cross-sectional explanatory view taken along line II-II of Fig. 1 .

Fig. 3 is a cross-sectional explanatory view taken along line III-III in Fig. 2 .

Fig. 4 is an enlarged cross-sectional explanatory view of main parts showing a second air passage and a third air passage.

Fig. 5 is a cross-sectional view taken along line V-V of Fig. 4 .

Fig. 6 is a cross-sectional explanatory view of a state from the state of Fig. 2 until the sliding portion of the compressed air generating portion has slid to the uppermost position.

FIG. 7 is an explanatory cross-sectional view taken along line VII-VII in FIG. 6 .

Fig. 8 is an enlarged cross-sectional explanatory view taken along line VIII-VIII in Fig. 1 .

9 is a side view of a wheel of a wheelchair having an automatic air supply mechanism according to Embodiment 2. FIG.

Fig. 10 is an enlarged cross-sectional explanatory view taken along line X-X in Fig. 9 .

Fig. 11 is an explanatory cross-sectional view taken along line XI-XI in Fig. 10 .

Fig. 12(A) is a front view of the sliding wheel.

Fig. 12(B) is a sectional view taken along line XII-XII of Fig. 12(A).

Fig. 13(A) is a partially enlarged sectional view of a cam portion.

Fig. 13(B) is a sectional view taken along line XIII-XIII in Fig. 13(A).

14 is a cross-sectional explanatory view of a state in which the sliding portion of the first compressed air generating unit slides toward the uppermost position and the sliding portion of the second compressed air generating portion slides toward the lowermost position from the state of FIG. 11 .

15 is a cross-sectional explanatory view of a state in which the sliding portion of the first compressed air generating unit has slid to the uppermost position and the sliding portion of the second compressed air generating unit has slid to the lowermost position, further sliding from the state of FIG. 14 .

Fig. 16 is a sectional view taken along line XVI-XVI of Fig. 15 .

17 is a cross-sectional explanatory view of a state in which the sliding portion of the first compressed air generating unit slides toward the lowest position and the sliding portion of the second compressed air generating portion slides toward the uppermost position from the state of FIG. 16 .

18 is a side view of a bicycle having an automatic air supply mechanism according to Embodiment 3 of the present invention.

19 is an enlarged cross-sectional explanatory view of main parts of an automatic air supply mechanism according to Embodiment 3. FIG.

Fig. 20 is an explanatory diagram of a rotary connection member in longitudinal section.

Fig. 21 is an explanatory diagram showing a cross-section of a rotary connection member.

22 is an enlarged cross-sectional view of a part of a seat portion of a bicycle having an automatic air supply mechanism according to Embodiment 3. FIG.

23 is an explanatory diagram of an automatic air supply mechanism according to Embodiment 4 of the present invention.

24 is an enlarged cross-sectional explanatory view of a bicycle brake device having an automatic air supply mechanism according to Embodiment 4. FIG.

Fig. 25 is an enlarged cross-sectional explanatory view of a state in which a brake shoe is pressed against a brake drum by operating the brake cable from the state in Fig. 24 .

Fig. 26 is a cross-sectional explanatory view of an embodiment in which both the first shaft insertion hole and the second shaft insertion hole are shaped to have slide grooves.

FIG. 27 is an explanatory diagram for calculating the amount of movement required for the holding shaft of the piston member with respect to the piston holding portion when the hub rotates.

Detailed ways

Embodiments of the invention of the present application will be specifically described below with reference to the accompanying drawings. 1 is a side view of a bicycle wheel equipped with an automatic air supply mechanism for a pneumatic tire according to Embodiment 1 of the present invention, FIG. 2 is an enlarged sectional explanatory view taken along line II-II of FIG. 1 , and FIG. 2 Explanatory drawing of the section along line III-III.

The air automatic supply mechanism of the pneumatic tire of this embodiment is provided on the front wheel 100 of the bicycle. A bicycle wheel 100 having the automatic air supply mechanism for an air tire includes an axle 101 and a wheel main body 110 rotatable with respect to the axle 101 .

As shown in FIG. 2 , the axle 101 includes an axle main body 101d having a threaded portion 101a on the outer periphery, ball rings 101b, 101b screwed and fixed to the left and right sides of the axle main body 101d, and a tubular positioning member 114. In addition, the positioning member 114 will be described later.

As shown in FIG. 1 , the wheel main body 110 includes a hub 102 , air tires 103 , and an automatic air supply mechanism. As shown in FIG. 2 , the hub 102 includes a cylindrical hub shell 102 a, and right support portions 102 b and left support portions 102 c respectively fixed to the left and right sides of the hub shell 102 a.

These support portions 102b and 102c are non-rotatably attached to the hub shell 102a so as to fit the outer periphery of the hub shell 102a. In addition, by attaching the right support part 102b and the left support part 102c to the left and right sides of the hub shell 102a, a divided space 111 is formed inside the hub 102 which is divided from the outside.

In addition, when these support portions 102b, 102c are inserted into the outer periphery of the hub shell 102a, ring-shaped waterproof gaskets 112, 112 made of synthetic rubber are arranged between the two, so that water does not The partitioned space portion 111 enters from between the support portions 102b, 102c and the outer periphery of the hub shell 102a.

On the inner side in the radial direction of each supporting portion 102b, 102c, there are a steel ball receiving portion 102d that can rollably receive steel balls, and a plurality of steel balls 107 . In addition, there are axle holes 102e, 102e through which the axle 101 passes, on the inner side in the radial direction of the steel ball receiving portion 102d.

In addition, as shown in FIG. 4, the axle 101 is passed through these axle holes 102e, and between the ball rings 101b, 101b screwed to the axle main body 101d and the steel ball receiving part 102d, grease (not shown) can be used. A plurality of steel balls 107 . . . 107 are arranged to roll together, and the steel ball receiving portion 102 d is rotatably supported by the axle body 101 d via these steel balls 107 . . . 107 . In this way, the hub 102 can freely rotate relative to the axle 101 .

A plurality of flanges 102g, 102g having spoke holes 102f . Further, in each spoke hole 102F...102f of each flange 102g, the base end side of each spoke 104 (shown in FIG. 1 ) is engaged. In addition, as shown in FIG. 1 , the head ends of the locked spokes 104 are locked to the rim 105 . In this way, the rim 105 is fixed on the hub 102 so as to be rotatable relative to the axle 101 .

The air tire 103 can rotate with the rim 105 relative to the axle 101 by being detachably locked to the rim 105 . In addition, as shown in FIG. 8 , inside the air tire 103 , an air retaining tube 103 b serving as an air retaining portion retaining air is provided.

In addition, this air holding tube 103b is provided with a valve 106 for letting air in and out. The valve 106 is formed of a cylindrical body, and an air inlet 106a is provided on the lower end side in the drawing, and a valve hole 106b is provided on the upper end side in the drawing. In addition, the valve hole 106 b is closed by a synthetic rubber cylindrical backflow prevention valve 106 c covering the outer periphery of the valve 106 .

Furthermore, the valve 106 is fitted into a cylindrical valve fitting 103c provided on the air retaining tube 103b, and is prevented from loosening by a valve stopper nut 106d screwed to the valve fitting 103c. In addition, when air is sent in from the air inlet 106a against the elasticity of the anti-backflow valve 106c blocking the valve hole 106b by an air input pump, etc., the backflow prevention valve 106c will be pushed open to allow air to enter the air holding inner tube 103b. . In addition, after the air has entered the air holding tube 103b, the valve hole 106b is closed by the elasticity of the backflow prevention valve 106c. Thus, it is possible to prevent the air in the air holding tube 103b from being discharged to the outside from the valve hole 106b.

Furthermore, the anti-backflow valve 106c, the valve attachment joint 103c, and the valve stopper nut 106d are components used in a general bicycle air retaining inner tube 103b, but they are not limited to components of this form, and can be used as appropriate. to change the use. In addition, the automatic air supply mechanism of the invention of the present application does not necessarily require the valve 106 of the air tire 103 and can be applied to the air tire 103 without the valve 106 . In addition, when providing a valve, it is not limited to the English valve (woods valve) shown in FIG. 8 mentioned above, For example, an American valve (Shorader valve) or a French valve (French valve) can be used, It can change suitably.

In the wheel 100 constructed in this way, the left and right sides of the axle 101 are fixed to the body of the bicycle via nuts 108, 108 (shown in FIG. 2 ). In this way, the wheel main body 110 can rotate relative to the body of the bicycle.

Next, the automatic air supply mechanism will be described. The air automatic supply mechanism for the bicycle pneumatic tire of this embodiment includes an air supply unit that generates compressed air and supplies it to the pneumatic tire. As shown in FIG. 2 and FIG. 3 , the air feeding unit includes a compressed air generator 1 for generating compressed air, and a compressed air supply for the pneumatic tire for guiding the compressed air generated by the compressed air generator 1 to the pneumatic tire 103 and supplying it. Path 2.

The compressed air generator 1 includes a compression chamber 31 for compressing air, a piston member 32 as a compression operation body for compressing the air in the compression chamber 31, an air inlet 4 for inputting air into the compression chamber 31 from the outside, Waterproof mechanisms 51 , 52 , 54 , 55 that prevent water from entering the compression chamber 31 from the air inlet 4 .

The compression chamber 31 is formed inside the inner cover 3a having a circular cross section. On the outer peripheral side of the inner cover 3a, an outer cover 3b having a circular cross section is disposed so as not to be rotatable. In addition, hub mounting portions 30b, 30b (shown in FIG. 3 ) are provided on the base end side of the housing 3b. In addition, the hub mounting portions 30b, 30b are fixed to the outer periphery of the hub shell 102a of the hub 102 via bolts 30c, 30c. In this way, the inner cover 3 a is attached to the outer peripheral side of the hub shell 102 a of the hub 102 with the outer cover 3 b interposed therebetween, and protrudes toward the outer peripheral side of the hub shell 102 a of the hub 102 .

Inside the inner cover 3a attached to the hub 102 in this way, the partition wall 7 is provided. In addition, the inside of the inner cover 3a is partitioned by the partition wall 7 to form a lower compression chamber 31 in the figure and a communication supply path 13b for a pneumatic tire compressed air supply path 2 described later on the upper side in the figure.

The piston member 32 that compresses the air in the compression chamber 31 configured as described above includes a rod-shaped piston rod 33 as an operating body, a cam abutting portion 35 that abuts against a cam surface 91a of a cam 9 described later, The cam holding part held on the cam 9. By passing the piston rod 33 slidably through the synthetic rubber cylindrical rod guide member 38 provided on the inner cover 3a, the head end portion of the piston rod 33 on the upper side in FIG. 2 is sent into the compression chamber 31. Inside. In this state, the piston rod 33 is arranged on the radially outer side of the cam surface 91 a of the cam 9 so that the axis of the piston rod 33 substantially coincides with the axis of the compression chamber 31 . In addition, a slide portion 34 is provided at the head end portion of the piston rod 33 .

The sliding portion 34 has a diameter substantially equal to the inner peripheral diameter of the compression chamber 31 so as to slide along the inner peripheral wall of the compression chamber 31 in the axial direction of the compression chamber 31 , that is, in the radial direction of the axle shaft 101 and the cam 9 . In addition, the sliding portion 34 is provided with an annular spacer 34 a made of synthetic rubber.

The base end portion of the piston rod 33 on the lower side in the figure is passed from the rod guide member 38 of the compression chamber 31 through the piston introduction hole 115 pierced in the hub shell 102a, and is sent into the partitioned space of the hub 102. Section 111. Further, at the base end portion of the piston rod 33, a cam abutment portion 35 and a cam holding portion are provided.

In this embodiment, the cam abutting portion 35 is constituted by a part of the outer periphery of the freely rotatable drum 37 as shown in FIG. 2 . More specifically, a part of the roller 37 protrudes from the piston rod 33 to the cam surface 91a side of the cam 9 between the piston rod 33 and the cam surface 91a of the cam 9, and in this state, the held shaft 36 is rotatably attached to the cylinder. On the piston rod 33. In addition, a part of the outer circumference of the roller 37 protruding toward the cam surface 91 a side constitutes the cam abutting portion 35 . The cam abutting portion 35 of this embodiment is formed on an axis extension line q extending the axis of the piston rod 33 .

In this embodiment, the cam holding portion is constituted by a part of the holding shaft 36 to which the roller 37 is attached. More specifically, the holding shaft 36 is passed through the shaft insertion hole provided on the piston rod 33 and the shaft insertion hole provided on the drum 37, and protrudes to the left side of the piston rod 33. In this state, is installed on the piston rod 33. In addition, the protruding portion 36 a of the protruding holding shaft 36 constitutes a cam holding portion that is held on the cam 9 .

The cam 9 that rotates as the roller 37 rolls is provided with a cam main body 91 having a circular cross-sectional cam surface 91 a abutting against the roller 37 on the outer periphery, and a piston holding portion as an operating body holding portion for detachably holding the piston member 32 . 92. The piston holder 92 is formed of a disc-shaped member. In the central portion of the piston holding portion 92, a cam main body housing hole 92a for rotatably housing the cam main body 91 is provided. In addition, since the cam body 91 is rotatably accommodated in the cam body housing hole 92 a, the piston holding portion 92 is disposed on the left side in the axial direction of the cam surface 91 a of the cam body 91 .

In addition, on the outer peripheral side of the cam body housing hole 92a of the piston holding portion 92, shaft insertion holes 92b . In addition, the protruding portion 36a of the holding shaft 36 is inserted into the shaft insertion hole 92b so that it can be inserted and retracted. Moreover, in this embodiment, the shaft inserting holes 92b...92b are respectively provided in three holes spaced about 120° apart in the circumferential direction on the same circumference centered on the shaft center of the cam body housing hole 92a of the shaft supporting member 92. Three components on one part. In addition, what is necessary is just to fit and hold the protrusion part 36a of the shaft 36 in any one of the three shaft insertion holes 92b...92b.

In this way, the piston member 32 of the compressed air generator 1 is detachably held by the cam 9 via the holding shaft 36 . Therefore, in this embodiment, there is no coil spring for biasing the piston rod that always presses the roller 37 of the piston member 32 against the cam surface 91a in a state of abutment, and the piston member 32 is held by the cam 9 With a rigid cam configuration, the roller 37 of the piston member 32 can always abut against the cam surface 91a, and travel on the cam surface 91a as the hub 102 rotates. Moreover, the piston member 32 is not limited to the member of the form held on the cam 9, and a coil spring for urging the piston rod may be provided so that the coil spring for urging the piston rod always abuts against the cam surface 91a. The state pushes.

In addition, as shown in FIG. 3 , an axle insertion hole 93 through which the axle 101 is inserted is pierced in the cam 9 . The center O2 of the axle insertion hole 93 is separated from the center O1 of the cam surface 91 a by a predetermined distance.

After the axle 101 is inserted through the axle insertion hole 93, as shown in FIG. In addition, the position of the cam fixing nut 44 relative to the ball ring 101 b is determined by a positioning member 114 provided on the axle 101 . In addition, in this fixed state, as shown in FIG. 3 , the center O2 of the axle insertion hole 93 coincides with the rotation center O3 of the hub 102 .

Therefore, in the state shown in FIGS. 2 and 3 , the position of the cam surface 91 a against which the roller 37 of the compressed air generator 1 abuts is the small diameter portion A having the smallest distance from the center O2 of the axle insertion hole 93 . In addition, from the small-diameter portion A, the distance from the center O2 of the axle insertion hole 93 in the circumferential direction gradually increases, and at a position reaching half a circle, it becomes the large-diameter portion B whose distance from the center O2 of the axle insertion hole 93 is the largest. .

In addition, when the roller 37 reaches the small-diameter portion A of the cam surface 91a, as shown in FIGS. The lowest position A1. On the other hand, when the roller 37 has reached the large-diameter portion B of the cam surface 91a, as shown in FIGS. The smallest uppermost position B1.

The air inlet 4 of the compressed air generator 1 is a portion for supplying air from the outside to the compression chamber 31 as described above. In this embodiment, as shown in FIG. 2 , the sliding portion 34 of the piston rod 33 is in the vicinity of the lowermost position A1 in the range of movement of the sliding portion 34 from the lowermost position A1 where it slides in the compression chamber 31 to the uppermost position B1. The position of is formed so as to penetrate from the outer peripheral wall of the inner cover 3 a to the compression chamber 31 .

By setting the air inlet 4 at a position near the lowest position A1 of the sliding part 34 of the compression chamber 31, when the sliding part 34 surpasses the air inlet 4 from the lowermost position A1, and moves from the surpassed position to the uppermost position When B1 slides, the air in the compression chamber 31 can be compressed without leaking into the air inlet 4 . Therefore, by providing the air inlet 4 at the above position, it is unnecessary to prevent the air from flowing from the compression chamber 31 to the air inlet 4 when the air is compressed by the sliding of the sliding portion 34 in the compression chamber 31. The anti-backflow valve can be manufactured simply and at low cost.

On the other hand, when the air inlet 4 is provided in the vicinity of the lowest position A1 of the sliding part 34 of the compression chamber 31, since the sliding part 34 slides from the uppermost position B1 toward the lowermost position A1, until the air reaches the No air enters the compression chamber 31 until the input port 4, so the compression chamber 31 is in a negative pressure state.

Therefore, for example, when the slide portion 34 slides from the uppermost position B1 to the lowermost position A1, compared with the case where the air inlet 4 is provided near the uppermost position B1 in the moving range of the slide portion 34 and substantially no negative pressure state is formed, resistance becomes larger.

In this way, when the air inlet 4 is provided at a position near the lowest position A1 of the sliding portion 34 of the compression chamber 31 as described above, the piston member 32 cannot be held on the cam 9. The rod 33 is biased from the uppermost position B1 to the direction of the lowermost position A1 as a coil spring for urging the piston rod for urging the compression operation body, and the sliding part 34 of the piston rod 33 is moved from the uppermost position by the urging force of the coil spring. When the position B1 slides toward the lowest position A1, it is necessary to use a coil spring having a biasing force of a size capable of sliding against the negative pressure of the compression chamber 31 .

However, if such a coil spring with a large urging force is used, when the sliding portion 34 is slid from the lowermost position A1 to the uppermost position B1, it must be slid against the urging force of the coil spring so that the hub 201 moves relative to the axle shaft. The rotation resistance of 101 becomes larger. Therefore, when the air inlet port 4 is provided in the vicinity of the lowest position A1 of the sliding part 34 of the compression chamber 31, as shown in this embodiment, the coil spring for urging the piston rod is not provided, and the piston It is desirable to constitute a rigid cam in which the member 32 is held on the cam 9 in order to reduce the rotational resistance of the hub 201 with respect to the axle 101 and allow smooth rotation.

In addition, the position of the air inlet 4 is not limited to the example of the form provided in the above-mentioned position, For example, it may be provided in the vicinity of the uppermost position B1 of the movement range of the sliding part 34. However, in this case, it is necessary to attach a backflow prevention valve, which increases the number of manufacturing steps and increases the cost. Therefore, as shown in the above-mentioned embodiment, it is desirable to provide the air inlet port 4 at a position near the lowest position A1 of the moving range of the sliding part 34, from the viewpoint that it can be manufactured simply and at low cost. .

In this embodiment, the waterproof mechanism of the compressed air generating unit 1 includes a first air passage 51 , a right axle clearance air passage 52 as a second air passage connected to the first air passage 51 , and a right axle clearance air passage 52 connected to the first air passage 51 . The third ventilation path 54 and the sealing member 55.

The first air passage 51 connects the air inlet 4 and the partitioned space 111 of the hub 102 in a ventilated manner, and guides the air in the partitioned space 111 from the partitioned space 111 to the air inlet 4 . The first air passage 51 of this embodiment is constituted by a guide groove formed on the inner peripheral wall of the housing 3b from the air inlet 4 to the divided space portion 111 of the hub 102 .

As shown in FIGS. 4 and 5 , the right axle gap ventilation path 52 is constituted by a space path from the inner peripheral surface of the axle hole 102e of the right support portion 102b of the hub 102 to the axle 101 passing through the axle hole 102e. The axle gap 52a between them extends through the steel ball gap 52b...52b between the steel balls 107, 107 arranged between the ball ring 101b of the axle 101 and the steel ball receiving part 102d, and is formed in on the right support part 102b.

In addition, in this embodiment, the positioning member 114 is disposed on the axle hole 102e, and the axle gap 52a is formed between the inner peripheral surface of the axle hole 102e and the outer periphery of the positioning member 114 .

As shown in FIG. 4 , the third air passage 54 is divided between the inner peripheral surface of the cylindrical body 56 and the outer periphery of the axle 101 so as to connect the right axle clearance air passage 52 with the outside.

More specifically, the cylindrical body 56 is made of synthetic resin, and, as shown in FIG. 4 , is provided with a locking protrusion 56a for attaching to the right support portion 102b on the outer periphery of the left end.

Further, the cylindrical body 56 is attached to the right support portion 102d of the hub 102 by fitting the locking protrusion 56a into the locking groove 102b provided on the right support portion 102b.

In addition, between the outer periphery of the cylindrical body 56 and the right support portion 102b, a waterproof gasket 116 is provided. With this waterproof gasket 116, water does not flow from between the outer periphery of the cylindrical body 56 and the right support portion 102b. Enter the right axle clearance vent path 52 .

In this way, the axle 101 is inserted through the cylindrical body 56 mounted on the right support portion 102b of the hub 102, and the right axle gap air path 52 is connected to the outside between the inner peripheral surface of the cylindrical body 56 and the axle 101. The communicating third air passage 54 is formed over the entire circumference on the outer peripheral side of the axle 101 . In this embodiment, the ball ring 101b of the axle 101 is arranged on the inner peripheral side of the cylindrical body 56 , and the third air passage 54 is formed between the outer periphery of the ball ring 101b and the inner peripheral surface of the cylindrical body 56 .

In addition, the third air passage 54 has an outer side (right side in FIG. 4 ) formed by making the inner peripheral surface of the cylindrical body 56 into a tapered shape whose diameter gradually increases as it goes toward the right outer side. The tapered portion 59a and the small-diameter narrow portion 59c having a small radial width L1 are formed by a closed portion 59b extending radially inward from the tapered portion 59a inside (left side in FIG. 4 ) of the tapered portion 59a. The taper angle P of the tapered surface portion 59a in this embodiment is set to 10°.

In addition, in the third air passage 54 , a large-diameter narrow portion 61 formed by the inner peripheral surface of the cylindrical body 56 and the covering member 60 is provided on the right side of the small-diameter narrow portion 59 c. The covering member 60 is formed of a disc-shaped member having a larger outer diameter than the small-diameter narrow portion 59 c , is disposed radially inward of the tapered portion 59 a of the cylindrical body 56 , and is fixed to the axle 101 .

In this way, between the outer periphery of the covering member 60 and the tapered portion 59a of the cylindrical body 56, the width L2 in the radial direction is about the same as the width L1 of the small-diameter narrow portion 59c, and the diameter is larger than the large diameter of the small-diameter narrow portion 59c. Narrow portion 61 . Therefore, the third air passage 54 of this embodiment is formed by including two narrow portions 59 c and 61 with different diameters, and air can flow in a meandering manner by these two narrow portions 59 c and 61 . In addition, in this embodiment, the width L1 of the small-diameter narrow portion 59 c and the width L2 of the large-diameter narrow portion 61 are set to about 0.5 mm.

The seal member 55 is a member that seals the left axle clearance ventilation path 53 formed in the hub 102 from the outside. The left axle gap ventilation path 53 is the same as the right axle gap ventilation path 52. As shown in FIG. In the axle gap 53a, a space path extending through the steel ball gap 53b between the ball rings 101b, 101b of the axle 101 and the steel balls 107, 107 disposed between the ball receiving portion 102d is formed.

In addition, as shown in FIG. 2 , the sealing member 55 is formed of an annular member made of synthetic rubber. Furthermore, the seal member 55 is mounted on the ball ring 101b by fitting the mounting piece 55a provided on the inner peripheral side of the seal member 55 into the mounting groove 101c provided on the ball ring 101b. In addition, the outer periphery of the seal member 55 attached to the ball ring 101b in this way abuts against the left support portion 102c over the entire circumference. In this way, the left axle clearance ventilation path 53 is sealed from the outside in an approximately airtight state, so that water does not enter the left axle clearance ventilation path 53 from the outside.

Next, the compressed air supply path 2 for pneumatic tires of the automatic air supply mechanism will be described. The compressed air supply path 2 for the air tire is formed between the compressed air generating part 1 and the air tire 103, as shown in FIGS. , the supply path 13a for sending out the air tire connected to the air holding inner tube 103b of the air tire 103, and the supply path 21a for connecting the supply path 13b for connecting and sending out the supply path 13a for the air tire.

The supply passage 13b for communication is formed by partitioning the compression chamber 31 in the inner cover 3a on the upper side in FIG. 2 by the partition wall 7 . The partition wall 7 is pierced with a through hole 71 through which the compression chamber 31 and the communication supply path 13b are communicated so as to allow ventilation.

The through hole 71 is provided with a backflow prevention valve 40 . The anti-backflow valve 40 is a part of a backflow prevention mechanism that prevents air from flowing backward from the compressed air supply path 2 for the pneumatic tire to the compression chamber 31. 40 poses. The ball valve 40 includes a ball 41 , a rubber ring-shaped ball receiving pad 42 for receiving the ball 41 , and a ball urging coil spring 43 as an urging member for urging the ball 41 toward the ball receiving pad 42 side. In addition, the ball 41 closes the through hole 71 from the compressed air supply path 2 side for the pneumatic tire by the urging force of the ball urging coil spring 43 .

The supply path 21 a for connection is formed inside the cylindrical connection pipe 21 . The proximal end side of the connecting pipe 21 is attached so as to enter the communication supply path 13b of the inner cover 3a. In this way, the proximal end side of the connection supply path 21a is air-permeably connected to the communication supply path 13b.

Moreover, as shown in FIG. 3, this connection pipe 21 has the pressure adjustment part 12 which adjusts the air pressure of the compressed air supply path 2 for pneumatic tires. With this pressure regulator 12, the compressed air supply path 2 for pneumatic tires can function as a constant pressure holding section that holds air at a constant pressure.

The pressure regulator 12 of this embodiment includes a cylindrical portion 12a having an exhaust port 11a, a valve body 12b that opens and closes the exhaust port 11a, and a constant pressure valve as a constant pressure valve urging member that urges the valve body 12b. The coil spring 12c is used for urging.

By installing the cylindrical portion 12a on the side wall of the connecting pipe 21, the exhaust port 11a of the cylindrical portion 12a communicates the connecting supply path 12a with the outside, so that the compressed air of the connecting supply path 21a can be discharged from the exhaust port 11a. Exhaust to the outside.

The constant pressure valve urging coil spring 12c always urges the valve body 12b toward the connecting supply passage 21a side. Thus, with this urging force, the valve body 12b blocks the exhaust port 11a.

In addition, this pressure adjustment part 12 is not limited to the example of the form provided in the supply path 21a for connection, You may provide in the compressed air supply path 2 for pneumatic tires. In addition, the pressure adjustment part 12 can be comprised, for example by a ball valve etc., and can be changed suitably.

The supply path 13a for sending out the air tire is formed inside the connecting pipe 14 having elasticity. The base end portion of the connection pipe 14 is attached to the head end side of the connection pipe 21 so as to be press-fitted into the outer periphery of the connection pipe 21 . In this manner, the supply path 21a for connection and the supply path 13a for sending out the air tire are connected so that air can be ventilated.

In addition, on the head end side of the connection pipe 14 on the opposite side attached to the connection pipe 21, as shown in FIG. The pneumatic tire connection portion 16 includes a gasket 16a and a nut locking piece 16b that is locked to a valve stopper nut 106d of the air retaining inner tube 103b. In this way, in a state where the gasket 16a is pressed against the end surface of the valve 106, the nut locking piece 16b is locked with the valve stopper nut 106d. In this way, the supply path 13a for sending out the air tire is air-permeably connected to the air holding tube 103b.

Next, the operation of the air automatic supply mechanism for the pneumatic tire of the bicycle according to this embodiment will be described. The sliding part 34 of the compressed air generating part 1 is arranged at the lowest position A1 in the compression chamber 31, and the sliding part 34 of the second compressed air generating part 1b is arranged at the uppermost position B1 in the compression chamber 31, as shown in FIGS. 2 and 3. To start the state shown, the air tire 103 is rotated relative to the axle 101 by, for example, running the bicycle. Thus, when it rotates, the hub 102 rotates, and the roller 37 of the piston member 32 of the compressed air generator 1 advances from the small diameter portion A to the large diameter portion B of the cam surface 91 a of the cam 9 together with the hub 102 .

As it travels, the piston member 32 starts to be pushed by the cam 9 , and the roller 37 of the piston member 32 is pushed to reach the large diameter portion B of the cam 9 . Thus, by this pressing, the sliding part 34 slides in the compression chamber 31 along the inner wall surface of the compression chamber 31 from the lowest position A1 to the uppermost position B1.

In this way, when the sliding portion 34 slides from the lowermost position A1 to the uppermost position B1, the air in the compression chamber 31 is compressed to a constant compression ratio.

When the sliding portion 34 slides, for example, when the end of the piston rod 33 is pressed against the cam surface 91a of the cam 9 by a coil spring for biasing to maintain the abutting state, it is necessary to resist the biasing force. However, in this embodiment, since the piston rod 33 is held on the cam 9 via the holding shaft 36, a coil spring for urging is provided, Therefore, the piston rod 33 can be smoothly slid with a small force. In this way, the resistance when the hub 102 is rotated can be reduced.

In addition, for example, when the force in the tangential direction of the cam 9 received by the piston rod 33 from the cam 9 is large, the piston rod 33 pushes the rod guide member 38 of the compression chamber 31 to one side. become difficult to slide, and the rod guide member 38 wears out. As a result, the piston rod 33 is inclined with respect to the axial direction of the compression chamber 31, and thus becomes more difficult to slide. However, in this embodiment, the force that the piston rod 33 receives from the cam 9 in a direction perpendicular to the axial direction of the compression chamber 31 can be greatly reduced, and the wear of the rod guide member 38 can be reduced. Therefore, even if it is used repeatedly, the piston rod 33 can always be pushed toward the axial center of the compression chamber 31, and can slide smoothly.

In addition, when the roller 37 of the piston member 32 of the compressed air generating unit 1 comes to the large diameter portion B of the cam surface 91a, that is, as shown in FIGS. 6 and 7 , the sliding portion 34 of the piston rod 33 of the compressed air generating unit 1 Move to the uppermost position B1. Thus, when it moves, the air in the compression chamber 31 of the compressed air generating part 1 is compressed.

In this way, when the air in the compression chamber 31 of the compressed air generating unit 1 is compressed, the ball 41 of the backflow prevention valve 40 is pushed from the compression chamber 31 by the air pressure of the compressed air. At this time, the ball 41 of the backflow prevention valve 40 receives the pressing force by the air pressure in the compressed air supply path 2 for the pneumatic tire and the urging force of the ball urging coil spring 43 . Therefore, when the pressing force from the side of the compressed air supply path 2 for the pneumatic tire is smaller than the pressing force from the inside of the compression chamber 31, the ball 41 of the backflow prevention valve 40 moves to the side of the compressed air supply path 2 for the pneumatic tire to move the The through hole 71 is opened. In this way, the compressed air compressed in the compression chamber 31 is sent from the through hole 71 to the compressed air supply path 2 for pneumatic tires.

Also, the ball 41 of the backflow prevention valve 40 closes the through hole 71 when the slide portion 34 moves from the uppermost position B1 to the lowermost position A1 in the compression chamber 31 . In this way, the air in the compressed air supply path 2 for pneumatic tires can be prevented from returning to the compression chamber 31 .

When the compressed air supply path 2 for the pneumatic tire that has entered the compressed air exceeds the specified air pressure, the air pressure in the compressed air supply path 2 for the pneumatic tire is used to resist the urging force of the coil spring 12c for energizing the constant pressure valve, The valve body 12b of the pressure regulator 12 is pressed to open the exhaust port 11a. In this way, the compressed air in the compressed air supply path 2 for pneumatic tires is discharged to the outside through the discharge port 11a. Furthermore, when the air pressure in the air tire compressed air supply path 2 reaches a predetermined air pressure, the valve body 12b closes the exhaust port 11a by the urging force of the constant pressure valve urging coil spring 12c.

The compressed air maintained at a predetermined air pressure in the compressed air supply path 2 for pneumatic tires enters the valve 106 of the air retaining inner tube 103b as shown in FIG. Backflow valve 106c. Like this, when utilizing the air pressure in the compressed air supply path 2 for the air tire, the pushing force applied to the backflow prevention valve 106c from the inside is greater than the elastic force of the backflow prevention valve 106c and the air pressure of the air holding inner tube 103b added to the backflow prevention valve. When the resultant force of the pushing force on the valve 106c pushes the anti-backflow valve 106c that blocks the valve hole 106b from the inside, air flows into the air holding inner tube 103b from the compressed air supply path 2 for the pneumatic tire.

In addition, when the pushing force applied to the backflow prevention valve 106c by the air pressure of the air tire compressed air supply path 2 and the elastic force of the backflow prevention valve 106c and the air pressure applied to the backflow prevention valve 106c by the air holding inner tube 103b When the resultant force of the pushing force is the same, the inflow of air into the air holding tube 103b stops.

Thereafter, as time goes by, the air pressure of the air retaining inner tube 103b becomes lower, the resultant force of the elastic force of the backflow prevention valve 106c and the pushing force applied to the backflow prevention valve 106c by the air pressure of the air retaining inner tube 103b is less than that of using When the air pressure of the compressed air supply path 2 for the air tire is added to the pushing force on the anti-backflow valve 106c, the air pressure of the compressed air supply path 2 for the air tire is used again to push the anti-backflow valve 106c that blocks the valve hole 106b from the inside. Open, the air of the compressed air supply path 2 for pneumatic tires flows into the air retaining inner tube 103b. Thus, the air pressure of the air holding inner tube 103b is always kept constant.

In addition, when the connection pipe 14 is separated from the connection pipe 21 or the air tire 103, or the connection pipe 14 is damaged, the air pressure of the air tire 103 can be kept as it is by the valve 106 of the air tire 103. Moreover, although the cam 9 is fixed on the axle shaft 101 without changing its position, and the piston rod 33 travels on the cam surface 91a to change its position, in FIGS. The position is expressed by changing the position of the cam surface 91a. The same applies to FIGS. 12 and 13 described later.

In addition, when the hub 102 rotates, the piston member 32 is stretched by the cam 9 because the holding shaft 36 is held on the piston holding portion 92 of the cam 9, and the roller 37 maintains a state of abutting against the cam surface 91a of the cam 9, It progresses from the large diameter part B of the cam surface 91a to the small diameter part A. At this time, the extension of the piston member 32 by the cam 9 is performed from the left side of the piston rod 33 at a distance from the axis extension line q of the piston rod 33 . However, since the air is not compressed when the sliding part 34 slides from the uppermost position B1 to the lowermost position A1, it is the same as when the sliding part 34 slides from the above-mentioned lowermost position A to the uppermost position B1. Compared with the situation, it can be carried out with very little force, so that the pulling operation of the piston rod 33 can be smoothly performed.

By the travel of the roller 37, the slide part 34 moves from the uppermost position B1 to the lowermost position A1 in the compression chamber 31, and returns to the state shown in FIGS. 2 and 3 .

In addition, when the sliding portion 34 of the piston rod 33 slides from the uppermost position B1 to the lowermost position A1 and passes through the air inlet 4, the air in the partitioned space portion 111 of the hub 102 is passed from the air inlet 4 through the first air passage. 51 into the compression chamber 31.

In addition, when the air in the divided space portion 111 enters the first air passage 51 , outside air is drawn into the divided space portion 111 through the right axle clearance air passage 52 and the third air passage 54 as the second air passage 52 .

At this time, since the third air passage 54 has the tapered portion 59a, as shown in FIG. The third air passage 54 discharges to the outside. In addition, the water M1 that has entered the tapered surface portion 59a can be discharged to the outside of the third air passage 54 through the tapered portion 59a by its own weight. Moreover, since the third air passage 54 is equipped with two narrow portions 59c, 61 with different diameters, it is difficult for water M1 such as rainwater to pass through the third air passage 54, so that it is difficult for water M1 such as rainwater to pass through the third air passage 54. Enter the right axle clearance vent path 52 .

In addition, if water M1 such as rainwater enters the right axle clearance ventilation passage 52 from the third ventilation passage 54, since grease is arranged on the right axle clearance ventilation passage 52 together with the steel balls 107...107, the water It is difficult for M1 to pass through the right axle clearance air path 52 , which can make it difficult to enter the divided space portion 111 of the wheel hub 102 from the right axle clearance air path 52 .

Therefore, the water M1 will not enter the partitioned space 111 through the second air path 52 and the third air path 54, but only air enters. As a result, only the air in the partitioned space 111 is passed through the air inlet 4 through the first air flow. The path 51 is sucked into the compression chamber 31, thereby preventing water such as rainwater from entering together with the air.

The following is the same, as the hub 102 rotates, the sliding part 34 of the piston member 32 slides in the compression chamber 31, and the generation of compressed air and the input of external air are repeated in the compression chamber 31, and the generated compressed air is properly supplied to the compression chamber 31. Pneumatic tires 103 supply.

In addition, when detaching the piston member 32 from the cam 9, the holding shaft 36 is attached to the piston rod 33 and pulled out to the right side in a state where it is pulled out from the shaft insertion hole 92b. , In this way, the piston member 32 can be removed from the cam 9, so that the inner cover 3a or the piston rod 33 constituting the compression chamber 31 can be easily removed from the hub 102. Therefore, it can be easily disassembled to replace parts, etc., making maintenance easy.

Furthermore, in the above-mentioned first embodiment, although the left axle clearance ventilation passage 53 is blocked from the outside by the seal member 55, the second ventilation passage is constituted by the right axle clearance ventilation passage 52, and the right axle clearance ventilation passage 52 and the right axle clearance ventilation passage 52 are provided. The third air passage 54 communicating with the outside is not limited to the example of this form, and can be changed as appropriate. For example, the sealing member 55 may not be provided, the second ventilation path may be constituted by the right axle clearance ventilation path 52 and the left axle clearance ventilation path 53, and the third ventilation paths may be respectively provided on the right axle clearance ventilation path 52 and the left axle clearance ventilation path 53. 54. However, when the third air passage 54 as shown in the above-mentioned embodiment is provided on the left and right sides of the hub 102, the cost becomes high, so the third air passage 54 is only provided on the left or right side of the hub 102. On the other side of the hub 102, the sealing member 55 is provided on the other side of the right or left, because it can make it difficult for water to enter the second air passage 54, and it can be produced at low cost, so it is ideal.

In addition, in the first embodiment, although the third air passage 54 is formed by the cylindrical body 56 fixed to the hub 102 and the cover member 60 fixed to the axle 101, it is not limited to the example of this form, and may be Change appropriately. For example, the third air passage 54 may be formed only by the cylindrical body 56 fixed to the hub 102 .

In addition, in the first embodiment, although the second air passage is constituted by the right axle clearance air passage 52 formed on the hub 102, it is also possible to provide the support parts 102b, 102c to provide air flow from the divided space part 111 to the outside. The through-holes used to pass through are used instead of the right axle clearance ventilation passage 52, or together with the right axle clearance ventilation passage 52 to form a second ventilation passage, and are appropriately changed. More specifically, for example, the support parts 102b and 102c are freely rotatably supported on the hub 102 via dustproof bearings, and a partition space The through hole through which the portion 111 penetrates to the outside is used as the second air passage.

In addition, in the above-mentioned first embodiment, although the waterproof mechanism is constituted by the first air passage 51, the second air passage 52, the third air passage 54, and the sealing member 55, for example, it may be provided with an inner air passage from the outer cover 3b. The peripheral surface of the outer peripheral surface is formed with a perforated hole that communicates with the air inlet 4 of the inner cover 3b and the outside, and a member that covers the perforated hole and can block liquid and pass through a gas covering film to form a waterproof mechanism. The cover film blocks rainwater and the like, and allows only air to pass through the piercing holes from the outside of the cover 3b.

In addition, in the first embodiment, the taper angle P of the tapered surface portion 59a of the cylindrical body 56 is set to 10°, but it is not limited to the example of this form, and can be changed as appropriate. The cone angle P is preferably in the range of about 5° to about 15°. When the angle is less than about 5°, it is difficult to move the water to the larger diameter by the centrifugal force accompanying the rotation of the hub, and it is difficult to drive the water to the outside. In addition, it is difficult for water to be driven to the outside by its own weight to the side with a larger diameter. On the other hand, when it is larger than about 15°, falling rainwater or the like easily enters.

In the first embodiment, the width L1 of the small-diameter narrow portion 59 c and the width L2 of the large-diameter narrow portion 61 of the third air passage 54 are set to about 0.5 mm, but these can be changed appropriately. A range of about 0.1 mm to about 1.5 mm is preferable. When it is less than about 0.1mm, due to the suction of air accompanying the sliding of the piston rod 33 in the compression chamber 31, the partition space 111 of the hub 102 becomes negative pressure, and the possibility of water being sucked increases at the same time. . On the other hand, when it is larger than about 1.5mm, water is easy to enter. As described above, the third air passage 54 in this embodiment is divided and formed between the inner peripheral surface of the cylindrical body 56 fixed to the hub 102 and the outer peripheral surface of the axle 101 . In addition, the third air passage 54 includes a small-diameter narrow portion 59 c formed by reducing the diameter of a part of the inner circumference of the cylindrical body 56 to reduce the width L1 in the radial direction. In addition, the third air passage 54 is provided with a covering member 60 fixed to the axle body 102d and disposed on the inner peripheral side of the cylindrical body 56, so that the radial width L2 is approximately the same as the width L1 of the small-diameter narrow portion 59c. , and the diameter of the large-diameter narrow portion 61 is larger than that of the small-diameter narrow portion 59c. In this manner, the third air passage 54 includes at least two narrow portions 59c and 61 having different diameters, and the two narrow portions 59c and 61 allow air to flow in a meandering manner. In addition, the radial widths L1, L2 of the two narrow portions 59c, 61 are approximately in the range of 0.1 mm to 1.5 mm.

Next, Embodiment 2 will be described. 9 is a side view of a wheelchair wheel having an automatic air supply mechanism for the pneumatic tire of the wheelchair according to Embodiment 2, and FIG. 10 is an enlarged cross-sectional explanatory view taken along line X-X in FIG. 1 .

The automatic air supply mechanism according to Embodiment 2 is provided on the left wheel 500 and the right wheel (not shown) of the wheelchair to form an automatic air supply mechanism for the pneumatic tire of the wheelchair. The left wheel 500 and the right wheel of the wheelchair having the automatic air supply mechanism for the pneumatic tire of the wheelchair have the same configuration. The left wheel 500 will be described below, and the description of the right wheel will be omitted.

The left wheel 500 includes an axle 101 and a wheel main body 110 . The axle 101 has the same structure as the axle of the first embodiment described above.

As shown in FIG. 9 , the wheel main body 110 includes a hub 102 , air tires 103 , and an automatic air supply mechanism. The hub 102 and the pneumatic tire 103 have the same configuration as those of the first embodiment described above.

The automatic air supply mechanism includes a plurality of compressed air generating units 1a, 1b for generating compressed air, and compressed air supply paths 2a, 2b for air tires for guiding the compressed air generated by the compressed air generating units 1a, 1b to air tires and supplying them. .

In this embodiment, the compressed air generation part is comprised of two, the 1st compressed air generation part 1a which appears on the upper side of FIG. 10, FIG. 11, and the 2nd compressed air generation part 1b which appears on the lower side of a figure.

The first compressed air generating unit 1 a and the second compressed air generating unit 1 b have the same configuration as the compressed air generating unit 1 of the first embodiment described above. The first compressed air generator 1a and the second compressed air generator 1b are fixed to the outer periphery of the hub shell 102a via bolts 30c, 30c arranged at positions spaced apart from each other by 180° in the circumferential direction.

In addition, the respective piston members 32, 32 of the first compressed air generating unit 1a and the second compressed air generating unit 1b are held by the holding shafts provided on the respective piston members 32, 32 in the same manner as the piston members in Embodiment 1 above. 36 and 36 are held by a disc-shaped piston holding portion 92 provided on the cam 9 .

As shown in FIGS. 13A and 13B , the piston holding portion 92 of the cam 9 according to Embodiment 2 includes a holding portion main body 89 , a sliding wheel 80 sliding on the holding portion main body 89 , and a holding mechanism for holding the sliding wheel 80 in a slidable state. Member 90.

As shown in FIGS. 12A and 12B , the pulley 80 is formed of a cylindrical member. On the inner peripheral side of the slide wheel 80 , a holding shaft insertion hole 83 into which the holding shaft 36 is fitted is provided. In addition, a cylindrical portion 81 and a flange portion 82 having a larger diameter than the cylindrical portion 81 are provided on the outer peripheral side of the slide wheel 80 .

As shown in FIG. 13A and FIG. 13B, the holding part main body 89 is provided with a first shaft insertion hole 92b provided on a concentric circle 96 centered on the center O1 of the cam surface 91a serving as the axis of the cam main body housing hole 92a. And the 2nd shaft inserts socket 95.

The first shaft insertion hole 92b is formed of a circular hole similarly to the insertion hole of the first embodiment described above. Moreover, the holding shaft 36 of the piston member 32 of the 1st compressed air generating part 1a is rotatably inserted in this 1st shaft insertion hole 92b.

On the other hand, the second shaft insertion hole 95 is provided with a sliding groove 95a formed of an arc-shaped long groove extending at a predetermined length along the circumferential direction of the concentric circle 96, and the The seat portion 95 b is cut from the left side of the piston holding portion 92 to a predetermined depth and a predetermined width over the entire circumference thereof.

In addition, the cylindrical portion 81 of the sliding wheel 80 is fitted into the sliding groove 95a of the second shaft insertion hole 95, and the flange portion 82 of the sliding wheel 80 abuts against the seat portion 95b, thereby the sliding wheel 80 is slidably accommodated. It is embedded in the second shaft insertion hole 95 .

The sliding wheel 80 thus accommodated in the second shaft insertion hole 95 is at the starting end position 91a abutting against the first end 95c formed in the sliding groove 95a formed in the second shaft insertion hole 95 from the cylindrical portion 81 , the cylindrical portion 81 can move in the second shaft insertion hole 95 within the range of the end position 97b where the cylindrical portion 81 abuts against the second end 95d formed on the sliding groove 95a.

In addition, in this embodiment, the position of the second shaft insertion hole 95 of the sliding wheel 80 relative to the first shaft insertion hole 92 b and the groove length of the sliding groove 95 a of the second shaft insertion hole 95 are accommodated in this embodiment. is formed as follows.

As shown in FIG. 13B, first, an extension line extending from the axis 92d of the first shaft insertion hole 92b through the center O1 of the cam surface 91a and then intersecting the concentric circle 96 from the center O1 is taken as a reference. Line 98. Thereafter, from the state where the axis 83a of the holding shaft inserting hole 83 of the sliding wheel 80 is located at the intersection of the reference line 98 and the concentric circle 96, the axis 83a is clockwise and counterclockwise from the reference line 98. The two clockwise directions can be moved to positions approximately 36° represented by the central angles Ψ/2 and Ψ/2 from the center O1 of the cam surface 91a, and the moved position becomes the starting end position 97a of the slide wheel 80. , The terminal position 97b forms the second shaft insertion hole 95 .

As shown in FIG. 13A , the holding member 90 is a member serving as a sliding wheel inclination prevention mechanism that prevents the sliding wheel 80 from tilting relative to the axial direction of the axle 101 when the sliding wheel 80 slides, and is formed of a disc-shaped member. In addition, the holding member 90 is attached to the axle shaft 101 so as to cover the slide wheel 80 accommodated in the second shaft insertion hole 95 from the seat portion 95 b side of the second shaft insertion hole 95 . In this way, when the sliding wheel 80 slides in the second shaft insertion hole 95, the flange portion 82 is held in a state of abutting against the seat portion 95b. Therefore, the sliding wheel 80 can maintain a state in which the shaft center of the shaft insertion hole 83 is substantially parallel to the axis of the axle 101, and the axial direction of the shaft insertion hole 83 is not inclined relative to the axial direction of the axle 101 during sliding. Slide in the second shaft insertion hole 95.

In addition, the holding shaft 36 of the piston member 32 of the second compressed air generator 1 b is fitted into the holding shaft fitting hole 83 of the sliding wheel 80 accommodated in the second shaft fitting hole 95 as described above. Like this, holding shaft 36 just can be by means of sliding wheel 80, in the 2nd shaft inserting hole 95, with the center O1 of cam surface 91a as the center, along the circumferential direction of cam surface 91a, at a distance from the center O1 of cam surface 91a. The central angle Ψ represents movement in an angular range of approximately 72°.

As mentioned above, by arranging the first compressed air generating part 1a and the second compressed air generating part 1b as described above, as shown in FIGS. 37 abuts against the small diameter portion A of the cam surface 91a, and when the sliding portion 34 of the piston rod 33 reaches the lowest position A1 of the compression chamber 31, the holding shaft 36 of the piston member 32 of the second compressed air generating portion 1b is arranged on the The second shaft fits substantially in the center of the insertion hole 95, and the roller 37 of the piston member 32 abuts against the large diameter portion B of the cam surface 91a, and the sliding portion 34 of the piston rod 33 reaches the uppermost position B1 of the compression chamber 31.

Next, the compressed air supply paths 2a and 2b for pneumatic tires will be described. The compressed air supply path for air tires in the second embodiment is composed of the first compressed air supply path 2a for air tires formed between the first compressed air generation part 1a and the air tire 102, the second compressed air generation part 1b and the second compressed air generation part 1b. The second air tire between the air tires 103 is constituted by the compressed air supply path 2b.

The first compressed air supply path 2a for air tires has the same configuration as the compressed air supply path 2 for air tires in Embodiment 1 above, and includes a communication supply path 13b communicating with the compression chamber 31 of the first compressed air generating unit 1a. , The supply path 13a for sending out the air tire, and the supply path 21a for connecting that connects the supply path 13b for connecting and the supply path 13a for sending the air tire.

The second compressed air supply path 2b for air tires is the same as the first compressed air supply path 2a for air tires, and includes a supply path 13b for communication, a supply path for sending air tires, and a supply path for connection. However, the second air tire compressed air supply path 2b connects the communication supply path 13b to the connection supply path 21a of the first air tire compressed air supply path 2a via the connection path 22a, and the connection supply path 21a It is connected to the air tire sending supply path 13a and the air tire 103 of the first compressed air supply path 2a for air tires. Therefore, the connection supply path 21a of the first pneumatic tire compressed air supply path 2a of this embodiment and the air tire delivery supply path 13a will connect the connection supply path 21a of the second pneumatic tire compressed air supply path 2b and the air It is also used as a supply path for sending out tires.

Next, the operation of the automatic air supply mechanism for the pneumatic tire of the wheelchair according to the second embodiment will be described. Fig. 10 and Fig. 10 and Fig. 10 and Fig. The state indicated by 11 is started, and the pneumatic tire 103 is rotated relative to the axle 101 by, for example, pushing the wheelchair to move forward. Thus, when it rotates, the hub 102 rotates, and the roller 37 of the piston member 32 of the first compressed air generating part 1a advances from the small diameter portion A of the cam surface 91a of the cam 9 toward the large diameter portion B together with the hub 102, and The roller 37 of the piston member 32 of the second compressed air generating unit 1 b advances from the large diameter portion B toward the small diameter portion A of the cam surface 91 a of the cam 9 .

In addition, when it travels, as shown in FIG. 14 , the holding shaft 36 of the piston member 32 of the second compressed air generating part 1 b is directed toward the second shaft insertion hole 95 via the sliding wheel 80 . The first end 95c of the sliding groove 95a of 95 moves, and the cylindrical portion 81 moves to the starting end position 97a of the sliding wheel 80 abutting on the first end 95c.

At this time, for example, when the sliding wheel 80 is not provided and the holding shaft 36 is directly inserted into the second shaft insertion hole 95 to slide in the second shaft insertion hole 95, the piston of the second compressed air generating part 1b When the member 32 is accommodated in a freely rotatable manner relative to the compression chamber 31, if resistance is applied to the holding shaft 36 when the holding shaft 36 slides in the second shaft insertion hole 95, the holding shaft 36 may be held as follows. The shaft 36 does not slide in the second shaft insertion hole 95 , the piston member 32 rotates relative to the compression chamber 31 via the holding shaft 36 , and the axial direction of the holding shaft 36 is inclined relative to the axial direction of the axle shaft 101 . When the axial direction of the holding shaft 36 is inclined with respect to the axial direction of the axle shaft 101, the following situation will also occur, that is, the axis of the roller 37 traveling on the cam surface 91a of the cam 9 is inclined and it is difficult to travel on the cam surface 91a. , or the retaining shaft 36 protrudes from the second shaft insertion hole 95 , which may cause the problem that the piston member 32 cannot slide smoothly in the compression chamber 31 .

However, in this embodiment, since the retaining shaft 36 moves in the second shaft inserting hole 95 by means of the sliding wheel 80 sliding in the second shaft inserting hole 95, the retaining shaft 36 just slides in the second shaft inserting hole 95. move smoothly. Therefore, even when the piston member 32 of the second compressed air generating unit 1b is housed in a freely rotatable manner relative to the compression chamber 31, the holding shaft 36 can smoothly move in the second shaft insertion hole 95 via the sliding wheel 80, Thereby, the piston member 32 can be smoothly slid in the compression chamber 31 .

In addition, when the roller 37 advances, the piston member 32 of the first compressed air generating unit 1a starts to be pushed by the cam 9 again until the roller 37 of the piston member 32 reaches the large-diameter portion B of the cam 9 . Further, by this pressing, as shown in FIGS. 15 and 16 , the slide portion 34 slides in the compression chamber 31 from the lowest position A1 toward the uppermost position B1 along the inner wall surface of the compression chamber 31 .

In addition, when the sliding portion 34 slides from the lowermost position A1 to the uppermost position B1, the air in the compression chamber 31 is compressed to a constant compression ratio.

The compressed air generated in the first compressed air generating part 1a is the same as in the case of the previous embodiment 1. It enters the connection supply path 21a from the communication supply path 13b, and then passes through the air tire sending supply path 21a from the connection supply path 21a. The air tire 103 is properly entered into the air tire 103 through the path 13a.

On the other hand, the holding shaft 36 of the piston member 32 of the second compressed air generating part 1b starts from the starting position 97a shown in FIG. The approximate center of the slide groove 95a. In addition, when the holding shaft 36 moves, the sliding part 34 of the piston rod 33 of the second compressed air generating part 1b is pulled by the cam 9, and moves along the inner wall surface of the compression chamber 31 in the compression chamber 31 from the uppermost position. B1 moves toward the lowermost position A1.

In addition, when the roller 37 of the piston member 32 of the second compressed air generating unit 1b reaches the large diameter portion B of the cam surface 91a, the roller 37 of the piston member 32 of the first compressed air generating unit 1a reaches the center of the cam surface 91a. As shown in FIGS. 15 and 16 in the small-diameter portion A, the sliding portion 34 of the piston rod 33 of the second compressed air generating portion 1b moves to the lowest position A1.

Even when the sliding part 34 of the piston rod 33 of the second compressed air generating part 1b comes from the uppermost position B1 to the lowermost position A1, since the holding shaft 36 of the piston member 32 is held on the piston holding part 92 of the cam 9, Therefore, the piston member 32 is pulled toward the piston holding portion 92 of the cam 9 from the left side of the piston rod 33 axially separated by a certain distance from the axial center extension line q of the piston rod 33 . However, since the air is not compressed when the sliding part 34 slides from the uppermost position B1 to the lowermost position A1, it is the same as the case where the air is compressed when the sliding part 34 slides from the lowermost position A1 to the uppermost position B1. Compared with this, it can be done with a smaller force, so that the pulling operation of the piston rod 33 can be smoothly performed.

In addition, when the sliding part 34 of the piston rod 33 of the second compressed air generating part 1b passes through the air inlet 4, the air in the partitioned space part 111 of the hub 102 is sent in from the air inlet 4 through the first air passage 51. Compression chamber 31. In addition, the second air passage 52 and the third air passage 54 can prevent water from entering the partitioned space portion 111 of the hub 102 and allow only air to enter.

When the hub 102 rotates again from the state shown in FIG. 16 , then as shown in FIG. 17 , the piston member 32 of the first compressed air generating part 1a is pulled toward the cam 9 by the holding shaft 36, and the roller 37 is pulled from the cam surface. The large-diameter portion B of 91a advances toward the small-diameter portion A, whereby the slide portion 34 moves from the uppermost position B1 to the lowermost position A1 (see FIG. 11 ).

On the other hand, the second compressed air generating unit 1 b makes the holding shaft 36 of the piston member 32 pass through the sliding wheel 80 in the second shaft insertion hole 95 toward the second end 95 d of the sliding groove 95 a of the second shaft insertion hole 95 . Move to the end position 97b where the cylindrical portion 81 abuts against the second end 95d. In addition, during its movement, the roller 37 of the piston member 32 starts to travel from the small-diameter portion A of the cam surface 91a toward the large-diameter portion B, and the roller 37 of the piston member 32 starts to be pressed by the cam surface 91 . In addition, by this travel, the slide portion 34 moves from the lowest position A1 toward the uppermost position B1 (see FIG. 11 ) in the compression chamber 31 . In this way, when it moves, the air in the compression chamber 31 is compressed to a certain compression ratio.

The air compressed by the second compressed air generating unit 1b passes through the connection path 22a from the communication supply path 13b of the second pneumatic tire compressed air supply path 2b, and enters the connecting supply path 2a of the first pneumatic tire compressed air supply path 2a. Path 21a. In addition, the compressed air that has entered the connection supply path 21a of the first compressed air supply path 2a for air tires passes through the supply path 13a for sending out the air tires and enters the air tires as in the case of the first compressed air generation part 1a described above. 103.

The following is the same, as the hub 102 rotates, the first compressed air generator 1 a and the second compressed air generator 1 b alternately repeat compressed air generation, and the compressed air is appropriately supplied to the pneumatic tire 103 .

By doing so, the first compressed air generator 1 a and the second compressed air generator 1 b sequentially and alternately compress air and supply it to the pneumatic tire 103 every time the wheel main body rotates. In this way, compressed air can be generated with approximately the same force as when one compressed air generating unit 1 is provided as in Embodiment 1, and compared with the case where one compressed air generating unit 1 is provided as in Embodiment 1, Twice the amount of compressed air can be generated. Therefore, in the normal running of the wheelchair, a sufficient amount of air can be compressed to make the air tire 103 reach a predetermined air pressure in a short time after the start of the running at the stage where the rotational speed of the wheels is small, and the running of the wheelchair can be suppressed. time resistance. This makes it suitable for wheelchairs etc.

Moreover, in this Embodiment 2, although the 1st compressed air supply path 2a for air tires and the 2nd compressed air supply path 2b for air tires are connected to form one path via the connection path 22a, but for example, you may connect the 1st air tire The compressed air supply path 2a and the second air tire compressed air supply path 2b are formed independently, and the compressed air supply paths 2a and 2b for each air tire are connected to the air tire 103, and the compressed air supply path for each air tire is used. 2a, 2b enter the pneumatic tire 103 with compressed air.

Next, an automatic air supply mechanism according to Embodiment 3 will be described based on FIGS. 18 to 22 . The automatic air supply mechanism of Embodiment 3 supplies air to the air tires of the wheels equipped on the bicycle, and also supplies air to the seat portion of the bicycle as a vehicle other than the air tires, thereby maintaining the cushioning performance of the seat cushion. .

The automatic air supply mechanism of the third embodiment is the same as the previous second embodiment, and includes two compressed air generating units, the first compressed air generating unit 10a and the second compressed air generating unit 10b, and compressed air supply paths 20a, 300.

Although the first compressed air generating unit 10a and the second compressed air generating unit 10b have the same configuration as those in the first embodiment, the first compressed air generating unit 10a and the second compressed air generating unit in the second embodiment 10b is mounted on the front wheel 202 of the bicycle. The wheel 202 on the front side of this bicycle is the same as the wheel of the bicycle in Embodiment 1 above, and as shown in FIG. , Pneumatic tire 103.

As shown in FIG. 19 , an axle 201 according to Embodiment 3 includes an axle hole 43 a. The shaft hole 43 a is opened from the left end of the axle 201 to a position slightly to the left of the left and right center along the axial direction. Thus, the shaft hole 43 a is extended from the outside of the hub 102 mounted on the axle 201 to the inside of the hub 102 . 21, the inside of the shaft hole 43a extending to the inside of the hub 202 communicates with the outer peripheral side of the axle 201 through the through holes 43b, 43b opened from the shaft hole 43a to the outside of the axle 201.

The hub 102 and air tire 103 of the wheel main body have approximately the same configuration as those of the first embodiment described above.

The compressed air supply path of the air automatic supply mechanism is composed of: the compressed air supply path 20a for the air tire that guides the compressed air generated in the first compressed air generating part 10a to the air tire 103 and supplies it; The other part where the compressed air generated in the bicycle is guided to the seat portion 140 provided on the bicycle and supplied is constituted by a compressed air supply path 300 . The compressed air supply path 20a for air tires has the same structure as the compressed air supply path 2 for air tires of Embodiment 1 mentioned above.

The compressed air supply path 300 for other parts includes: a communication supply path 13b (shown in FIG. 19 ) communicating with the compression chamber 31 of the second compressed air generating portion 10b; In FIG. 22 , the supply path 301 for sending out the seat is connected, and the supply path 302 for connecting that connects the supply path 13 b for sending out and the supply path 301 for sending out the seat.

As shown in FIG. 19 , the connection supply path 302 includes the shaft hole 43 a of the axle 201 , the connection shaft hole 43 a, and the connection path 303 of the communication supply path 13 b. The connection path 303 is formed inside the connection pipe 313 . The connection pipe 313 is connected to the shaft hole 43 a of the axle 201 via the rotation connection member 45 .

As shown in FIGS. 20 and 21 , this rotary connection member 45 includes two synthetic rubber rings 45 a , 45 a and an annular rotor 45 b.

The two rings 45a, 45a are fixed to the outer peripheries on the left and right sides of the through-holes 43b, 43b of the axle 201 .

On the outer peripheral side of the rotor 45b, a pipe connector 45c for detachably connecting the connecting pipe 313 is provided. In addition, the tube connector 45c is made of a cylindrical member, and has a tube connection hole 45d on the inner peripheral side.

On the inner peripheral side of the rotor 45b, as shown in FIG. 20 , an air pool 45e formed over the entire circumference is provided. In addition, this air pool portion 45e is communicated via a piercing hole 45f pierced so as to communicate with the tube connection hole 45d of the tube connector 45c and the air pool portion 45e. In addition, these air pockets 45e, pipe connection hole 45d, and piercing hole 45f constitute a connection hole 45i that connects the connection path 303 of the connection pipe 313 and the shaft hole 43a in an air-permeable manner.

In addition, ring accommodating portions 45g, 45g for accommodating the rings 45a, 45a in a rotatable manner are provided on both left and right sides of the air storage portion 45e. Thus, by rotatably accommodating the rings 45a, 45a in the ring housing portions 45g, 45, the rotor 45b can rotate relative to the axle 201 in a state where the air storage portion 45e communicates with the shaft hole 43a of the axle 201.

In this way, the connection pipe 313 and the axle shaft 201 are rotatably connected via the rotor 45b by the connection pipe 313 on the pipe connector 45c of the rotor 45b thus constituted. In addition, with this connection, the connection path 303 formed inside the connection pipe 313 and the shaft hole 43a formed in the axle 201 of the wheel 202 are communicated with each other.

In addition, as shown in FIG. 19 , the connection pipe 313 is mounted on the inner cover 3a via a connector 314. In this way, the connection path 303 formed inside the connection pipe 313 and the partition formed on the inner cover 3a by the partition wall 3a are divided. The common supply path 13b is connected so that ventilation is possible.

In addition, although not shown in figure, this connector 314 is equipped with the pressure adjustment part which adjusts the air pressure of the compressed air supply path 300 for other parts. In addition, this pressure regulator has the same configuration as the pressure regulator 12 in Embodiment 1 described above.

The seat sending-out supply path 301 of the compressed air supply path 300 for other parts is formed inside the pipe member 310 . The proximal end of the pipe member 310 that forms the supply path 301 for sending out the seat is connected to the axle 201 of the wheel 202 via a connector 310a. In this way, the supply path 301 for sending out the seat and the shaft hole 43a of the axle 201 are air-permeably connected.

The head end of the pipe member 310 is connected to the seat portion 140 provided on the bicycle.

The seat portion 140 of this embodiment to which the pipe member 310 is connected includes, as shown in FIG. 22 , a seat cushion 141 for seating a person and a seat cushion support portion 142 for supporting the seat cushion 141 . Moreover, the cushion support part 142 is equipped with the cushion support piece 143 which supports the cushion 141, and the cushion attachment part 150 which attaches the cushion support piece 143 so that a vertical movement is possible.

The seat cushion attachment part 150 is equipped with the air holding|maintenance part 151 which holds air inside. In addition, the air holding part 151 is provided with an air inlet 152 for feeding air. Furthermore, to this air inlet 152, a pipe member 310 is connected. In this way, the supply path 301 for sending out the seat and the air retaining unit 151 are air-permeably connected.

The lower side of the seat cushion mounting portion 150 is fitted and fixed in the vertical pipe 210 of the bicycle. In addition, this seat cushion attachment part 150 is not limited to being comprised by the member different from the vertical pipe 210, For example, you may comprise as a part of vertical pipe 210. As shown in FIG.

The upper side of the cushion support piece 143 is fixed to the cushion 141 . The air pressing part 144 which presses the air of the air holding part 151 to the downward side is provided in the lower part side of the cushion support piece 143. As shown in FIG. The air pressing portion 144 is arranged inside the air holding portion 151 so as to be slidable in the vertical direction along the inner peripheral wall of the air holding portion 151 of the seat cushion mounting portion 150 .

In addition, in this embodiment, as shown in this FIG. 22 , a coil spring 153 as an urging member for urging the air urging unit 144 is provided inside the air retaining unit 151 to urge the air urging unit 144 upward. It assists when the air pressing part 144 which slides the air holding part 151 downward is returned upward by the air pressure of compressed air.

When a person sits on the seat cushion 141 configured in this way and applies a downward force to the air pressing part 144, the air pressing part 144 pushes the air in the air holding part 151 from the upper side to the lower side. While compressing, it slides to the lower side together with the cushion 141 .

In addition, when the force applied to the air pressing portion 144 is reduced, the seat cushion 141 returns upward due to the air pressure of the compressed air in the air holding portion 151 . In this way, the seat cushion 141 can be made elastic, and can absorb the impact force applied to the seat cushion 141, thereby forming a seat cushion with a good riding feeling.

Next, the operation of the automatic air supply mechanism of the bicycle according to the third embodiment will be described.

The state shown in FIG. 10 in which the sliding part 34 of the first compressed air generating part 10a arranges the compression chamber 31 at the lowest position A1 and the sliding part 34 of the second compressed air generating part 10b arranges the compression chamber 31 at the uppermost position B1. Initially, the wheel body is rotated relative to the axle 201 , for example by running the bicycle. Thus, when it rotates, the hub 102 rotates, and together with the hub 102, the roller 37 of the piston member 32 of the first compressed air generating part 10a travels on the cam surface 91a of the cam 9, and the roller 37 of the second compressed air generating part 10b The roller 37 of the piston member 32 runs on the cam surface 91 a of the cam 9 .

In addition, when it travels, the first compressed air generating part 10a moves the compression chamber 31 from the lowermost position A1 to the uppermost position at the sliding part 34 of the piston rod 33 similarly to the first compressed air generating part 1a in the first embodiment described above. When the position B1 slides, the air in the compression chamber 31 is compressed at a constant compression ratio. Thereafter, the compressed air is appropriately fed into the air holding tube 103b of the pneumatic tire 103 from the compressed air supply path 20a for the pneumatic tire. When traveling further, the sliding portion 34 of the piston rod 33 slides the compression chamber 31 from the uppermost position B1 to the lowermost position A1, and air is input when passing through the air input port 4 as it slides. In this case as well, the air in the compartment 111 of the hub 102 is input into the compression chamber 31 from the air inlet 4 through the first air passage 51 . In addition, the air outside the hub 102 is input into the divided space portion 111 through the second air passage 52 and the third air passage 54 . Therefore, also in this third embodiment, it is possible to prevent water such as rainwater from entering the compression chamber 31 .

On the other hand, when the sliding part 34 of the piston rod 33 of the first compressed air generating part 10a slides the compression chamber 31 from the lowermost position A1 to the uppermost position B1 in the second compressed air generating part 10b, the second compressed air generating part The sliding part 34 of the piston rod 33 of 10b slides the compression chamber 31 from the uppermost position B1 toward the lowermost position A1, and inputs air when passing through the air input port 4 while sliding. Also in this case, it is possible to prevent water such as rainwater from entering the compression chamber 31 .

In addition, when the sliding portion 34 of the piston rod 33 of the second compressed air generating unit 10b slides the compression chamber 31 from the uppermost position B1 toward the lowermost position A1, when the sliding portion 34 of the piston rod 33 of the first compressed air generating unit 10a slides, The compression chamber 31 is slid from the lowermost position A1 toward the uppermost position B1, and the air in the compression chamber 31 is compressed at a constant compression ratio while sliding.

Thereafter, the air compressed by the second compressed air generating unit 10b is sent from the compression chamber 31 to the communication supply path 13b, and from the communication supply path 13b, passes through the connection path 303 and the shaft hole 43a of the axle 201 in order to be sent to the vehicle. The supply path 301 for sending out the seat. Then, it is sent to the air holding unit 151 of the seat unit 140 from the supply path 301 for sending out the seat. At this time, since the connection path 303 and the shaft hole 43a are rotatably connected by the connection hole 45i of the rotary connection member 45, the connection path 303 and the shaft hole 43a can be maintained during the rotation of the wheel main body accompanying traveling. In the connected state, compressed air can be generated in the second compressed air generating unit 10b during running, and the generated compressed air can be sent from the wheel 202 to the seat portion 140 of the bicycle.

In this way, the air holding part 151 can always be kept at the same air pressure as the compressed air supply path 300 for other parts. When the air pressure of the air holding part 151 is lower than the predetermined air pressure, the As it advances, the compressed air sequentially generated by the second compressed air generating unit 10b is sequentially fed.

In addition, in this Embodiment 3, although the air holding|maintenance part 151 is pressed by the air pressing part 144, and the air of the air holding|maintenance part 151 is compressed, it is not limited to the example of this form, You may change suitably. For example, the air holding part 151 may be provided on a part of the seat cushion 141, and when a person sits on the seat cushion 141, the air holding part 151 bears the load so that the seat cushion 141 itself has elasticity.

In addition, when the air pressing part 144 is provided, it is not limited to the form in which the air retaining part 151 is provided on the seat cushion mounting part 150 and the air pressing part 144 is provided on the seat part 140 like the above-mentioned embodiment. As an example, the air retaining portion 151 may be provided on the cushion supporting sheet 143 and the air pressing portion 144 may be provided on the cushion mounting portion 150, which may be appropriately changed.

In addition, the air retaining unit 151 may be appropriately changed by providing a backflow preventing valve for preventing the air from flowing backward from the air retaining unit 151 to the seat sending supply path 301 .

In addition, in this Embodiment 3, although the automatic air supply mechanism is provided in the front wheel 202, it can also be changed suitably by providing it in the rear wheel.

Next, an automatic air supply mechanism according to Embodiment 4 will be described based on FIGS. 23 to 25 . The automatic air supply mechanism according to Embodiment 4 is equipped on a bicycle as a vehicle, supplies air to the air tires of the wheels, and supplies air to brake devices as parts of the bicycle other than the air tires to prevent overheating of the brake devices. .

The automatic air supply mechanism of Embodiment 4 is the same as Embodiment 3 above, and includes two compressed air generators, namely, a first compressed air generator 400a and a second compressed air generator 400b, and compressed air supply paths 200a and 400 .

The first compressed air generating unit 400a and the second compressed air generating unit 400b are attached to the rear wheel of a bicycle as a vehicle. The axle 201 of the rear wheel and the pneumatic tire (not shown) of the wheel main body have approximately the same configuration as the members of the foregoing third embodiment.

In addition, the first compressed air generating part 400a and the second compressed air generating part 400b of the fourth embodiment respectively include a first air passage 51 communicating with the air inlet 4 and the partitioned space part 111 of the hub 402 for rear wheels, and The second air passage connected to the first air passage 51 . However, in this Embodiment 4, the right side of the right axle gap ventilation path 52 of the rear wheel hub 402 provided on the rear wheel is made substantially sealed from the outside by the annular seal member 550, and the rear wheel hub The left axle clearance ventilation passage 53 of 402 constitutes a second ventilation passage, and external air is input from the left axle clearance ventilation passage 53 to the partitioned space portion 111 .

Other parts of the first compressed air generating unit 400a and the second compressed air generating unit 400b have the same configuration as that of the first compressed air generating unit 10a of the third embodiment described above.

The compressed air supply path of Embodiment 4 includes a compressed air supply path 200a for an air tire that guides the compressed air generated in the first compressed air generating unit 400a to the air tire 103 and supplies it, and generates the compressed air in the second compressed air generating portion 400b. The compressed air supplied to other parts is guided to the brake device provided on the bicycle through the compressed air supply path 400 . The compressed air supply path 200a for air tires has the same structure as the compressed air supply path 2 for air tires of Embodiment 1 mentioned above.

In addition, the compressed air supply path 400 for other parts in Embodiment 4 includes a communication supply path 13b communicating with the compression chamber 31 of the second compressed air generating unit 400b, and a brake supply path connected to the bicycle brake device 120 described later. The supply path 401 is used, and the supply path 402 for connection connects the supply path 13b for communication, and the supply path 401 for sending out a brake. The supply path 13b for communication has the same configuration as that of the aforementioned third embodiment.

The connection supply path 402 of the compressed air supply path 400 for other parts also has the same configuration as the connection supply path 302 of the third embodiment described above. More specifically, the connection supply path 402 of the compressed air supply path 400 for other parts includes a shaft hole 43a opened in the axle 201, and a connection path 403 connecting the shaft hole 43a and the communication supply path 13b. In addition, the connection path 403 is formed inside the connection pipe 413 . In addition, the connection pipe 413 is rotatably connected to the axle 201 via the rotary connection member 45 , so that the connection path 403 of the connection pipe 413 and the shaft hole 43 a of the axle 201 are connected in an air-permeable and rotatable manner.

The brake sending supply path 401 is formed inside the pipe member 410 . The base end of the pipe member 410 is connected to the axle 201 of the rear wheel via a connector 410a. In this way, the brake supply path 401 and the axle hole 43a of the axle 201 are connected in an air-permeable manner.

The head end of the pipe member 410 is connected to the brake device 120 provided on the rear wheel of the bicycle.

Here, the brake device 120 for the rear wheel will be briefly described. The braking device 120 used in this embodiment is constituted by an inner expansion brake 120 . As shown in FIG. 23 , this inner expansion brake 120 includes a brake drum 121 as a member to be braked, a shoe 122 as a brake member, and a cover 123 covering them.

The brake drum 121 includes a cylindrical portion 121a, and a lining abutment portion 121b is provided on the inner peripheral side of the cylindrical portion 121a. In addition, the brake drum 121 is fixed to the rear wheel hub 402 by being attached to a brake drum attachment screw 405 a of the rear wheel hub 402 provided on the rear wheel. Thus, the brake lining abutting portion 121b rotates together with the rotation of the hub 302 for the rear wheel.

The housing 123 includes a disc portion 123a and a cylindrical portion 123b formed on the outer peripheral tip end of the disc portion 123a. In the cylindrical part 123b, the pipe connection port 123c connected to the supply path 401 for sending out brakes is penetrated so that it may penetrate from the outer periphery of the cylindrical part 123b to the inner peripheral side. Moreover, this cover 123 is passed through the axle 201, and is fixed to the axle 201 by the nut 123d for cover fixation. Moreover, by this fixation, the cylinder part 123b of the cover 123 covers the brake drum 121 from the outer peripheral side.

The brake shoe 122 is provided with a pair of arc-shaped brake shoe pieces 122a, 122a, as shown in FIG. 24 . These brake shoes 122a, 122a are provided with synthetic rubber brake linings 122b, 122b on the outer peripheral side. In addition, these brake shoes 122a, 122a are rotatably supported by the housing 123 on the inner peripheral side of the brake drum 121 via fixing bolts 122c passing between the base ends of the respective brake shoes 122a, 122a. . In this way, each brake shoe piece 122a, 122a can make the base end part into the axis|shaft of rotation, and can rotate the head end side. Moreover, between the head ends of these brake shoe pieces 122a, 122a, the brake shoe operation cam 124 which rotates and operates the brake shoe pieces 122a, 122a is arrange|positioned.

The cam 124 for brake shoe operation is equipped with the small-diameter part 124a, and the large-diameter part 124b whose diameter is larger than the small-diameter part 124a. Furthermore, the arm member 125 for movably operating the brake shoe operation cam 124 is connected to the brake shoe operation cam 124 , and is attached to the housing 123 so as to be rotatable together with the arm member 125 .

In addition, the arm member 125 is connected to a brake handle (not shown) via a brake wire 133 . In addition, as shown in FIG. 25 , the arm member 125 is moved by the operation of the brake handle, and accordingly, the cam 124 for brake shoe operation is rotated.

When it rotates, the large diameter part 124b of the cam 124 for brake shoe operation pushes the head end part of each shoe piece 122a, 122a apart. Thus, the brake linings 122b, 122b of the respective brake shoes 122a, 122a are pushed against the brake lining abutting portion 121b of the brake drum 121, so that the rotation of the brake drum 121 can be stopped.

On the other hand, when the operation of the brake handle is stopped, the brake pads 122a, 122a return to their original state by the biasing force of the coil spring 126 connected between the brake pads 122a, 122a, and the brake pads 122b, 122b Separated from the lining abutment portion 121b of the brake drum 121 .

Moreover, the head end of the pipe member 140 is attached to the pipe connection port 123c of the cover 123 of the inner expansion brake 120 comprised in this way.

The operation of the bicycle automatic air supply mechanism according to Embodiment 4 configured as described above will be described.

Also in this fourth embodiment, as in the previous third embodiment, for example, the bicycle is driven to rotate the wheel main body with respect to the axle 201 . In this way, the first compressed air generating unit 400a and the second compressed air generating unit 400b alternately compress air. Thereafter, the air compressed by the first compressed air generating unit 400a is appropriately fed into the air holding inner tube of the pneumatic tire through the compressed air supply path 200a for the pneumatic tire.

On the other hand, the air compressed by the second compressed air generator 400b is sent from the communication supply path 13b to the brake sending supply path 401 through the connection path 403 and the axle hole 43a of the axle 201 in order. Then, it enters the pipe connection port 123c of the brake device 120 from the supply path 401 for sending out brakes, and is blown from the pipe connection port 123c to the brake drum 121 . In this way, air can always be blown to the brake drum 121 during running, so that heat generation due to friction between the brake drum 121 and the brake linings 122b, 122b can be suppressed. In addition, even if the braking device 120 is overheated due to direct sunlight in summer, for example, it can be cooled as long as the vehicle travels, thereby preventing failure of the braking device 120 due to overheating.

The automatic air supply mechanism of the invention of the above-mentioned embodiment configured as described above can also be understood as follows.

That is, the automatic air supply mechanism of the embodiment is equipped with a compressed air generating unit that generates compressed air when the wheel body rotates relative to the axle, the compressed air generating unit is composed of a plurality of generating units, and each compressed air generating unit is equipped with a compressor for compressing the compressed air. chamber, an air inlet for inputting external air into the compression chamber, and a waterproof mechanism to prevent water from entering the compression chamber from the air inlet.

In addition, the automatic air supply mechanism of the above-mentioned embodiment includes a compressed air supply path for pneumatic tires for supplying the compressed air generated in the compressed air generating unit to the pneumatic tires, and a compressed air supply path for supplying the compressed air generated in the compressed air generating unit. The other-part compressed air supply path for supplying air to other parts of the vehicle other than the air tire, and the other-part compressed air supply path guides the compressed air generated in the compressed air generating unit to the brake device of the bicycle and supplies it part.

In addition, the brake device includes a braked member that rotates together with the air tire, and a brake member that is movable in contact with the braked member to stop the rotation of the braked member.

In addition, the compressed air supply path for other parts is a portion that guides and supplies compressed air generated by the compressed air generating unit to the seat portion of the bicycle.

The seat portion includes a seat cushion on which a person sits, and an air retaining unit that retains air. The air retaining unit is arranged so as to be able to withstand a load applied to the seat cushion and make the seat cushion elastic.

In addition, the seat part is equipped with a cushion supporting part that can support the cushion up and down, the air holding part is provided on the cushion supporting part, and the seat cushion supporting part has an air pressing part that can push the air of the air holding part, and the air pressing part When the load in the downward direction is applied to the cushion, the air in the air retaining portion is pushed, and the air in the air retaining portion is compressed by this pushing force, and the cushion can be moved downward, thereby making the cushion have a elasticity.

In addition, the compressed air supply path for other parts includes a supply path for communication communicating with the compression chamber of the compressed air generating part, and a delivery supply path for other parts connected to the seat part of the bicycle as other parts or the brake device. . A connecting supply path that connects the supply path for communication and the supply path for sending out other parts. In addition, the supply path for connection includes a shaft hole opened in the axle shaft along the axial direction of the axle and connected to another supply path for partial delivery, and a connection path that connects the shaft hole and the supply path for communication. In addition, the connection path and the shaft hole are rotatably connected via a connection hole rotatably connected to the shaft hole.

With this arrangement, the compressed air generated in the compressed air generating unit that rotates together with the wheel main body can be sent from the connection path to the connection supply path through the shaft hole, and then from the connection supply path to the seat of the bicycle. Other parts such as parts or braking devices are conveyed.

In addition, the automatic air supply mechanism of the embodiment includes a compressed air generating unit that generates compressed air when the vehicle body rotates relative to the axle, and the compressed air generating unit is composed of n (n is an integer greater than or equal to 2) generating units, and each compressed air generating unit The first end of the compression operation body is slidably arranged in the compression chamber, and the second end of the compression operation body is held on the shaft provided on the axle. In this way, when the wheel body rotates relative to the axle, the compression operating body will follow the cam and slide in the compression chamber to compress the air in the compression chamber. The cam main body of the cam surface, the operating body holding part that is rotatably arranged relative to the cam main body on the lateral side of the cam surface of the cam main body, and on the operating body holding part, at least (n-1) operating body holding parts The second end of each compression operation body is held movably in the circumferential direction of the operation body holding portion.

By setting in this way, in the state where the second ends of each compression operation body are held on one operation body holding part, while maintaining the state in which the second ends of each compression operation body abut against the cam surface of the cam, Make it rotate with the axis of the axle as the center of rotation. Therefore, the second ends of all the compressed operating bodies can be held by one operating body holding portion, so that the structure of the device can be simplified and manufactured at low cost.

In addition, the operating body holding portion includes a holding portion main body, a sliding wheel slidably attached to the holding portion main body in a circumferential direction of the holding portion main body, and prevents the sliding wheel from moving against the holding portion main body when the sliding wheel slides. Axial inclination anti-sliding wheel tilt mechanism, the sliding wheel is a member that can move the compression operating body in the circumferential direction of the cam surface 91a via the sliding wheel by holding the second end of the compression operating body.

With this arrangement, for example, the holding shaft provided on the compression operation body can be moved in the circumferential direction of the holding part main body via the slide wheel. At this time, for example, if no sliding wheel is provided and the holding shaft is directly inserted into the shaft insertion hole provided on the main body of the holding part to slide, then the piston member is freely rotatably accommodated relative to the compression chamber. When resistance is applied to the holding shaft while sliding in the shaft fitting hole, the holding shaft does not slide in the shaft fitting hole, the piston member rotates relative to the compression chamber by the holding shaft, and the holding shaft The axial direction is inclined with respect to the axial direction of the axle. When the axial direction of the holding shaft is inclined relative to the axial direction of the axle, the axis of the roller running on the cam surface of the cam is inclined and it is difficult to travel on the cam surface, or the holding shaft comes out of the shaft insertion hole, thereby There is a possibility that the piston member cannot slide smoothly in the compression chamber. Therefore, by moving the holding shaft in the circumferential direction of the holding part main body via the slide wheel as in this embodiment, even when the piston member is rotatably housed in the compression chamber, it is possible to prevent the holding shaft from tilting or the like. situation so that it can always be moved smoothly.

In addition, in the above-mentioned embodiment, although examples in which one or two compressed air generating units are provided are illustrated, it may be appropriately changed by providing three or more compressed air generating units.

In addition, in the second embodiment, the third embodiment, and the fourth embodiment in which two compressed air generating parts are provided, although the second shaft insertion hole 95 is provided with a slide formed by an arc-shaped long groove, In the form of the groove 95a, in the state where the respective holding shafts 36, 36 of the first compressed air generating part 1a and the second compressed air generating part 1b are held by one piston holding part 92, the first compressed air generating part 1a and the second compressed air generating part 1a The respective rollers 37, 37 of the compressed air generating unit 1b may always run on the cam surface 91a of the cam 9, but it is not limited to the example of this aspect, and may be changed appropriately.

For example, when the holding shaft 36 of the first compressed air generating part 1a is held by the first piston holding part, the holding shaft 36 of the second compressed air generating part 1b is held by a second piston holding part different from the first piston holding part. 36, the first shaft insertion hole 92b and the second shaft insertion hole 95 may be constituted by circular holes.

In addition, when the holding shafts 36, 36 of the plurality of compressed air generating parts 1a, 1b are held by one piston holding part 92, the shape of the first shaft fitting hole 92 and the second shaft fitting hole 95, etc. It is not limited to the example of the form shown in FIG. 13B , and can be appropriately changed, as long as the holding shafts 36, 36 of the first compressed air generating part 1a and the second compressed air generating part 1b are held by the piston holding part 92 In the held state, the respective rollers 37, 37 of the first compressed air generating unit 1a and the second compressed air generating unit 1b may be designed so that they always run on the cam surface 91a of the cam 9. More specifically, as follows.

That is, a plurality of compressed air generators are mounted on the hub in such a manner that the piston member can slide in the direction of approaching and retreating from the axle when the wheel body rotates relative to the axle, and the cam has The cam main body of the cam surface with a circular cross-section, and the piston holding part as the operating body holding member arranged on the lateral side of the cam surface of the cam main body in a freely rotatable manner relative to the cam main body, the cam main body is opposite to the center of the cam surface. The axle is attached to the axle in the state where the axle center is eccentric, and the piston holding part has a plurality of shaft insertion holes for holding the respective holding shafts of the plurality of compressed air generating parts, and any of these plurality of shaft insertion holes The two shaft insertion holes are formed in such a manner that the two retaining shafts respectively held in the two shaft insertion holes, represented by a central angle from the center of the cam face, total at least 4 ^sin- Within the angular range of ¹ {e/r·sin(θ/2)}, relative movement is possible along the circumferential direction of the cam surface. Here, r is the effective radius of the cam body, e is the eccentricity of the cam body from the axis center of the axle to the center of the cam surface, and θ is the angle formed by the respective sliding directions of the two piston members. In addition, the term "effective radius" refers to the axial distance from the center of the cam surface to the holding shaft of the cylinder holding the piston member.

For example, as shown in FIG. 27, the two piston members 32, 32 slide in the directions of approaching and retreating from the axle 101, respectively, and the angle formed by the respective sliding directions p1, p2 of the two piston members 32, 32 is set to be θ, let the effective radius of the cam main body 91 be e. In addition, a line connecting the center O1 of the cam surface 91a and the axis center of the holding shaft 36 of one piston member 32 and a line connecting the center of the cam surface 91a and the axis center of the holding shaft 36 of the other piston member 32 are formed. The angle of is set as the central angle β. In FIG. 27 , for convenience of description, the cam main body 91 is rotated around the axis of the axle 101 as the center O3 of rotation without rotating the piston members 32 , 32 .

In this way, as shown in FIG. 27 , the shortest radius line w1 connecting the shortest portion 91 b and the center of rotation O3 when the distance to the center of rotation O3 of the cam surface 91 a reaches the shortest reaches a position where the angle θ is bisected. , the central angle β becomes the minimum value β1.

On the other hand, when starting from this state, the cam main body 91 rotates 180° (the state indicated by a dashed line in FIG. 27 ), and the distance between the center O3 of the rotation and the cam surface 91a reaches the longest. 91c. When the longest radius line w2 of the center of rotation O3 reaches the position that bisects the angle θ, the central angle β becomes the maximum value β2.

Therefore, in the case where the two piston members 32, 32 are held on one piston holding portion 92 via the holding shafts 36, 36, when the piston member 32 is rotated relative to the cam main body 91, it is necessary to operate with the maximum The difference between the central angle β2 and the minimum central angle β1 is maintained so that the holding shafts 36 , 36 move relative to the piston holding portion.

That is, the shaft insertion hole 95 needs to be formed so that the holding shafts 36, 36 can move relative to the piston holding portion at least in the angle range of β2-β1=central angle Ψ (see FIG. 13B ).

Here, according to Fig. 27, (β1)/2=θ/2-sin ^-1 {(e/r) sin(π-θ/2)}, or (β2)/2=θ/2+sin ^-1 {(e/r) sin(θ/2)}. Therefore, it can be expressed as β2-β1=4sin ^-1 {(e/r)·sin(θ/2)}.

In the above discussion, when the holding shafts 36, 36 of the plurality of compressed air generating parts 1a, 1b are held by one piston holding part 92, it is necessary to make the two holding shafts 36, 36 at a distance from the center of the cam surface 91a. The central angle of O1 indicates that the first shaft insertion hole 92b and the second shaft insertion hole 95 can be formed in such a way that they can be moved relative to each other by at least a total of 4sin ^-1 {(e/r)·sin(θ/2)} . For example, as shown in FIG. 13B, when the sliding groove 95a for moving and holding the shaft 36 is formed only on one side of the second shaft insertion hole 95, the sliding groove 95a of the second shaft insertion hole 95 is aligned with the center. The angle Ψ is formed in such a way that it reaches 4sin ^-1 {(e/r)·sin(θ/2)} or more. In the embodiment shown in Fig. 13B, at approximately 180°, e is approximately 2.2 mm and r is approximately 14.2 mm. Therefore, the central angle Ψ is about 72°.

In addition, as shown in FIG. 26, when both the first shaft insertion hole 940 and the second shaft insertion hole 95 are made to have sliding grooves 940a, 95a, the first shaft insertion hole may also be The sum of the central angle Ψ1 of the sliding groove 940a of the 940 and the central angle Ψ2 of the sliding groove 95a of the second shaft insertion hole 95 (Ψ1+Ψ2) is 4 sin ^-1 {(e/r) sin(θ/2)} formed in the above manner.

26 shows a case where the central angle Ψ1 of the sliding groove 940a of the first shaft insertion hole 940 and the central angle Ψ2 of the sliding groove 95a of the second shaft insertion hole 95 are formed substantially the same. In addition, in this FIG. 26, 940b has shown the seat part 940b of the 1st shaft insertion hole 940a formed in the periphery of the slide groove 940a. In addition, even when three or more compressed air generating parts are provided, as long as any two holding axes among the three or more compressed air generating parts can be expressed by a central angle from the center O1 of the cam surface 91a, at least the total relative It is sufficient to form a shaft-embedded socket by moving the amount of 4sin ^-1 {(e/r)·sin(θ/2)}.

In addition, when the compressed air generating unit is composed of two, it is not limited to the above-mentioned embodiment, and when any one of the sliding parts slides from the lowest position to the uppermost position in the compression chamber, the other slides to the uppermost position in the compression chamber. An example of the manner in which the parts slide from the uppermost position to the lowermost position in the compression chamber and arranged at approximately equal intervals in the circumferential direction of the cam may be appropriately changed. However, when one of the sliding parts slides from the lowermost position to the uppermost position in the compression chamber, the other sliding part is arranged to slide from the uppermost position to the lowermost position in the compression chamber, so that compression can be efficiently generated. Air, is advantageous at this point.

In addition, in the above-mentioned embodiment, although the holding shaft 36 is moved relative to the second shaft insertion hole 95 by the sliding wheel 80, for example, when the piston member 32 of the second compressed air generating part 1a is moved relative to the compression chamber 31, In the case of rotational storage, the slide wheel 80 may not be provided, and the holding shaft 36 may be directly inserted into the second shaft insertion hole 95 to be moved.

In addition, when three or more compressed air generators are provided, they may be arranged at approximately equal intervals in the circumferential direction of the cam, but they may be appropriately changed by arranging them at unequal intervals.

In addition, in the above-described embodiment, although the compressed air generated in the compressed air generating unit is supplied to the seat portion or the brake device of the bicycle as other parts than the air tire through the other part of the compressed air supply path, the air tire The other parts are not limited to the seat part or the brake device of the bicycle, and can be changed as appropriate.

In addition, in the above-described embodiment, although the example in which the compressed air supply path for the pneumatic tire is provided is implemented, for example, it is also possible to connect the compressed air generating part to the pneumatic tire without providing the compressed air supply path for the pneumatic tire, and to compress the air tire. The compressed air generated in the air generating unit is directly sent to the pneumatic tire and changed appropriately.

In addition, the automatic air supply mechanism of the invention of the present application can be set on a vehicle with a wheel body that freely rotates relative to the axle, for example, it can be used in two-wheeled vehicles such as unicycles, motorcycles, and rear rack tricycles, various tricycles, four-wheelers, etc. Wheeled vehicles, lifts with wheels for lifts, etc.

In addition, in the above-mentioned embodiment, although the compression operation body is comprised by the piston member 32, it is not limited to the example of this form, It can change suitably. For example, the compression chamber 31 can be expanded to the inside of the hub 102, and a free-to-expandable expansion and contraction portion as a compression operation body is formed on the entire peripheral wall of the compression chamber 31 or on a part of the axial direction. Cam abutment on the cam surface 91 a of the cam 9 . Thus, along with the rotation of the hub 102, the cam abutting portion slides on the cam surface 91a, and when the cam abutting portion is pushed by the cam surface 91a during the sliding, the volume of the compression chamber 31 changes from an enlarged state to a reduced state. Compress the air.

In the automatic air supply mechanism for air tires of the present invention, a compressed air generating unit that generates compressed air when the wheel body rotates relative to the axle is provided, so that the compressed air generated in the compressed air generating unit can be supplied to the air tire. .

By doing so, when the wheel main body rotates relative to the axle, the compressed air generating unit compresses the air to generate compressed air, and the generated compressed air can be sent to the pneumatic tire. Therefore, for example, the bicycle is moved and the wheel body is rotated relative to the axle, so that the air can be automatically compressed at a certain pressure by the compression part, and the compressed air can be sent to the air tire, and the air tire is always The air pressure is set to a certain pressure.

In the automatic air supply mechanism for pneumatic tires of the present invention, the compressed air generating unit is composed of a plurality of generating units, and each compressed air generating unit includes a compression chamber and a compression operation body for compressing the air in the compression chamber. The compression operation body compresses the air in the compression chamber by being pressed by the cam provided on the axle when the wheel body rotates relative to the axle, and the plurality of compressed air generators are compressed in accordance with the time when the wheel body rotates relative to the axle. The compression operation body of the air generating unit is arranged so that the cams sequentially start pushing and the compression operations are sequentially started.

With this configuration, when the wheel body rotates with respect to the axle, the plurality of compressed air generators can generate compressed air in an amount several times larger than when one compressed air generator is provided to generate compressed air. For example, like a wheelchair, in normal travel, the travel distance is short, the rotation speed of the wheels is low, and the amount of compressed air that can be generated during short travel is small, and it is difficult to supply compressed air to the pneumatic tire of the wheelchair during short travel. . However, in this invention, a sufficient amount of compressed air can be generated by a plurality of compressed air generators in a short period of time after the start of traveling at a stage where the rotational speed of the wheels is low, and can be supplied to the pneumatic tire to form a predetermined air pressure. .

On the other hand, when the wheel main body rotates with respect to the axle, the compression operation body of each compressed air generating unit is sequentially pushed by the cam, and the compression operation can be started sequentially. Compressed air can be generated with a smaller force than in the case of compressing the air in the chamber, so that the resistance to rotation of the wheel body relative to the axle can be reduced.

For example, it is comprised by one cam, and the position of each compressed air generating part is shifted in the circumferential direction of a cam, and several compressed air generating parts are arrange|positioned. In this way, when the wheel main body rotates with respect to the axle shaft, the compression operating bodies of the respective compressed air generating units can be sequentially pressed by the cams, which can be easily manufactured. In addition, a plurality of compressed air generators can be arranged in a row along the circumferential direction of the cam, so that the length of the entire device in the axial direction of the axle can be shortened. Therefore, it can be easily attached to the hub provided on the wheel main body of a bicycle or a wheelchair, and can be applied to a bicycle or a wheelchair.

In the automatic air supply mechanism for a pneumatic tire according to the present application, the automatic air supply mechanism includes a compressed air supply path for other parts for guiding and supplying the compressed air generated by the compressed air generating unit to the seat portion.

By doing so, for example, the compressed air generated in one of the plurality of compressed air generating units can be supplied to the air tire through the compressed air supply path for the air tire, and the compressed air generated in the other compressed air generating unit can be supplied to the air tire. The compressed air supply path for other parts is supplied to the air retaining part provided on the seat part of the bicycle as another part, so that the seat cushion of the seat part is kept elastic. Alternatively, as another part, for example, the compressed air supply path for other parts may be used to supply the brake device of the bicycle to prevent overheating of the brake device.

In the automatic air supply mechanism for pneumatic tires according to the present application, the compressed air generating unit is composed of a first compressed air generating unit and a second compressed air generating unit, and the first compressed air generating unit and the second compressed air generating unit Each compression operating body of the air generating unit has a sliding part that slides along the compression chamber and a cam abutting part that abuts against the cam. The volume slides within the range of the uppermost position where the volume reaches the minimum state, and the cam abutting part is pushed by the cam when the wheel body rotates relative to the axle, and by this pushing, the sliding part slides the compression chamber from the lowermost position to the uppermost position. When sliding, the air in the compression chamber is compressed, and when the first compressed air generating part and the second compressed air generating part slide the compression chamber from the lowest position to the uppermost position according to one sliding part, the other slides The compression chamber is arranged so that the compression chamber slides from the uppermost position to the lowermost position.

With this arrangement, the first compressed air generating unit and the second compressed air generating unit alternately compress the air in the compression chamber, so that during the operation of either one compressing the air in the compression chamber, the other does not compress the air in the compression chamber operate. In this way, for example, twice the amount of compressed air can be generated with approximately the same force as when one compressed air generating unit is provided to generate compressed air.

In the automatic air supply mechanism for pneumatic tires according to the present application, the compressed air generating unit includes a compression chamber, a compression operation body for compressing the air in the compression chamber, and an air inlet for inputting external air into the compression chamber. , the compression operation body has a sliding part that slides along the compression chamber in the range from the lowest position where the volume of the compression chamber reaches the maximum state to the uppermost position where the volume of the compression chamber reaches the minimum state, and the sliding part is opposite to the wheel main body. When the axle rotates, when the compression chamber is slid from the lowermost position to the uppermost position, the air in the compression chamber is compressed, and the air input port is arranged to slide the compression chamber from the lowermost position to the uppermost position. Near the lowest position within the moving range of the head.

By doing so, when the sliding portion slides the compression chamber from the lowermost position to the uppermost position during the air compression operation, when the sliding portion goes over the air inlet from the lowermost position and slides from the passed position to the uppermost position, The air in the compression chamber can be compressed without leaking into the air inlet port. In this way, the anti-backflow valve for preventing air from flowing into the air inlet port from the compression chamber when the air is compressed by the sliding of the sliding part in the compression chamber is not required, so that it can be manufactured simply and at low cost. .

In the automatic air supply mechanism for pneumatic tires according to the present application, the compressed air generator is mounted on a hub provided on the wheel body so that air can be input from the inside of the hub into the compression chamber, and the input Air is compressed.

By doing so, it is difficult for water such as rainwater to enter, and air can be introduced into the compression chamber from the inside of the hub, so that the possibility of air and water entering the compression chamber can be reduced.

In the automatic air supply mechanism for pneumatic tires according to the present application, the compressed air generating unit adopts a compression chamber equipped with compressed air, an air inlet for inputting external air into the compression chamber, and prevents water from entering the compression chamber from the air inlet. The structure of the waterproof mechanism of the chamber.

By so setting, using the waterproof mechanism, even in the case of driving in rainy days, it is possible to prevent rainwater and the like from entering the compression chamber from the air inlet together with the air, and to prevent water such as rainwater from being sent into the compression chamber. The case of air tires.

In the automatic air supply mechanism for a pneumatic tire according to the present application, the wheel body includes a hub rotatably supported on the axle, the compressed air generator is mounted on the hub of the wheel body, and the waterproof mechanism includes The first air passage connecting the air inlet port and the inside of the hub in a breathable manner prevents water from entering the compressed air generating part by passing air from the inside of the hub into the compression chamber through the first air passage.

By doing so, it is difficult for water such as rainwater to enter, and the air inside the hub can be introduced into the compression chamber from the air inlet, so that the possibility of air and water entering the compression chamber through the air inlet can be reduced. Thus, the waterproof mechanism can be formed easily and at low cost.

In the automatic air supply mechanism for a pneumatic tire according to the present application, the hub includes a cylindrical hub shell and support parts that support the hub shell from both sides in the axial direction, and these support parts are rotatably supported on the axle shaft. , the hub is free to rotate relative to the axle, and the hub shell and the support portion are used to form a partitioned space part partitioned from the outside of the hub. In order to communicate the partitioned space part of the hub with the outside, the waterproof mechanism is formed on 2nd ventilation path on the support.

By doing so, it is possible to form a structure in which rainwater or the like hardly enters the partitioned space from the second ventilation path. In this way, when air is sent in from the divided space portion through the air inlet, it is possible to reliably prevent water from being sent in together with the air.

In the automatic air supply mechanism for pneumatic tires according to the present application, each support portion of the hub is equipped with a steel ball receiving portion that can rollably receive a plurality of steel balls, and the axle shaft can The axle hole that is inserted rotatably, by supporting the steel ball receiving portion freely rotatably by means of a plurality of steel balls on the axle inserted through the axle hole, the hub can freely rotate relative to the axle, and on each support portion of the hub Axle gap ventilation paths that can ventilately extend from the subdivided space are formed by passing through the axle gap formed between the inner peripheral surface of the axle hole and the axle and the steel ball gap formed between the steel balls, respectively. The 2 ventilation path has at least one of the two axle clearance ventilation paths as a constituent element.

When the steel ball is arranged in the steel ball receiving part, grease is usually arranged at the same time in order to smoothly roll the steel ball. Therefore, it is possible to form a structure in which it is difficult for water to pass through the steel ball gap, and it is difficult for water to pass through the axle gap air passage. In addition, such an axle gap ventilation path is formed on a normal wheel hub. Therefore, even if the second air passage is not separately formed, the axle clearance air passage formed in a normal wheel hub can be utilized, and a waterproof mechanism can be formed at low cost.

In the air automatic supply mechanism of the pneumatic tire of the present application invention, any one of the two axle gap ventilation paths is substantially sealed with the outside of the hub by a sealing member, and the other axle gap ventilation path constitutes the second axle gap ventilation path. Part or all of the ventilation path, the waterproof mechanism has a third ventilation path that communicates the other axle gap ventilation path that constitutes the second ventilation path with the outside, through the third ventilation path, the air outside the hub flows from the The other side of the axle clearance ventilation path enters the inside of the hub.

By doing so, if the formation of the third air passage requires a lot of cost, only one third air passage can be formed, and the overall cost can be suppressed.

In the automatic air supply mechanism for pneumatic tires according to the present application, the third ventilation path is a path defined between the inner peripheral surface of the cylindrical body inserted through the axle and mounted on the hub and the outer periphery of the axle. . On the inner peripheral surface of the cylindrical body, there is provided a tapered portion whose inner diameter gradually increases as it goes toward the outer side.

With such an arrangement, even when water enters the third air passage, the water can be moved to the larger diameter of the tapered portion by the centrifugal force accompanying the rotation of the hub and driven out to the outside. In addition, water can be transferred to the larger diameter of the tapered portion by its own weight, and can be driven out to the outside. Therefore, the third ventilation path can be made into a path through which water is difficult to pass.

In the automatic air supply mechanism for pneumatic tires according to the present application, the compressed air generator includes a compression chamber and a compression operation body for compressing the air in the compression chamber, and the first end of the compression operation body is slidably arranged. In the compression chamber, the second end of the compression operation body is held on the cam provided on the axle. In this way, when the wheel body rotates relative to the axle, the compression operation body will follow the cam and slide in the compression chamber. Air is compressed.

For example, when the coil spring for urging the compression operating body is used to press the end of the compression operating body against the cam to maintain the abutting state, it is necessary to slide the compression operating body against the urging force so that the wheel main body is opposite to each other. However, in this embodiment, since no coil spring for biasing is provided to hold the compression operation body on the cam, the compression operation body can be smoothly slid with a relatively small force. . In this way, resistance when the wheel body is rotated relative to the axle can be reduced.

In the automatic air supply mechanism for a pneumatic tire according to the present application, the compression operation body is detachably held on a cam.

By doing so, the compressed air generator can be easily detached from the cam, and the compressed air generator detached from the cam can be easily attached. In this way, it is possible to easily perform disassembly or the like to replace parts, etc., thereby forming a device that is easy to maintain.

In the automatic air supply mechanism for a pneumatic tire according to the present application, the cam includes a cam main body having a cam surface abutting against the compression operation body on the outer periphery, and an operation body holding portion disposed laterally of the cam surface of the cam main body. The compression operating body has a rod-shaped operating body, a cam abutting portion that abuts against the cam surface of the cam body, and a cam holding portion that is held on the operating body holding portion of the cam, and the operating body can be moved radially The cam abutting portion is arranged between the cam surface of the cam body and the operating body so as to be movably arranged on the radially outer side of the cam surface of the cam body, and the cam holding portion is detachably held by the operating body. department.

With such an arrangement, when the compression operation body is pushed by the cam to compress the air, the operating body of the compression operation body can be pushed from the radially inner side to the radially outer side by the cam abutment portion. In this way, the operating body can be effectively and smoothly moved along the radial direction of the cam.

In addition, when the compression operation body is held on the cam or removed from the held cam, the cam holding part is held on the operation body holding part arranged on the lateral side of the cam surface of the cam main body, or the holding part It only needs to be removed, so that the compression operation body can be easily removed from the cam. On the other hand, if the cam holding portion is held on the operating body holding portion disposed on the lateral side of the cam surface of the cam, when the compression operating body is stretched by the cam, the compression operating body will be pulled from the side. stretch. However, when the compressed operating body is stretched by the cam, since the air is not compressed, a large force is not exerted on the operating body, so that the operating body can be stretched smoothly and can be moved without hindrance. conduct.

In the automatic air supply mechanism for pneumatic tires according to the present application, the cam abutting portion is a member composed of a part of the outer periphery of the roller that is rotatably mounted on the operating body, and the cam holding portion is formed by holding the roller freely. It is rotatably supported by the operation body and constituted by a holding shaft held by the operation body holding portion of the cam.

By setting in this way, it is possible to reduce the force in the tangential direction of the cam surface on the cam abutment portion when pushing the compression operation body, so that the operation body of the compression operation body can be more effectively moved toward the radial direction of the cam. Move smoothly.

In addition, since the holding shaft that supports the roller freely rotatably on the operating body is used as the cam holding portion, and the holding shaft is held on the operating body holding portion of the cam, the holding shaft can also be used without forming a separate cam holding portion. Therefore, it can be manufactured easily and at low cost.

In the above discussion, although the present invention has been described using preferred embodiments, each term is used for illustration rather than limitation, and may be added in the appended text without departing from the scope and spirit of the present invention. Changes are made within the scope of the technical proposal.

Claims (14)

1. An automatic air supply mechanism for a pneumatic tire capable of automatically supplying air to a pneumatic tire mounted on a wheel main body rotatable relative to the axle of a vehicle, characterized in that, Equipped with a compressed air generating unit that generates compressed air when the wheel body rotates relative to the axle, the compressed air generated in the compressed air generating unit can be supplied to pneumatic tires, The compressed air generator has a compression chamber for compressing air, an air inlet for inputting external air into the compression chamber, and a waterproof mechanism for preventing water from entering the compression chamber from the air inlet, The wheel main body includes a hub rotatably supported on an axle, The compressed air generator is installed on the hub of the wheel body, The waterproof mechanism includes a first air passage that communicates the air inlet port with the inside of the hub in a breathable manner, and through the first air passage, air is supplied from the inside of the hub to the compression chamber to prevent water from entering the compressed air generator. 2. The air automatic supply mechanism for pneumatic tires according to claim 1, wherein the compressed air generator is composed of a plurality of compressed air generators, Each compressed air generating unit includes a compression chamber, a compression operation body for compressing the air in the compression chamber, The compression operation body is pressed by a cam provided on the axle when the wheel body rotates relative to the axle, thereby compressing the air in the compression chamber, The plurality of compressed air generating units are arranged such that when the wheel body rotates relative to the axle, the compression operation bodies of the compressed air generating units are sequentially pushed by the cam to sequentially start the compression operation. 3. The automatic air supply mechanism for pneumatic tires according to claim 1, wherein the automatic air supply mechanism has a device for guiding the compressed air generated in the compressed air generating part to supply other parts of the seat part. Compressed air supply path. 4. The air automatic supply mechanism for pneumatic tires according to claim 2, wherein the compressed air generating unit is composed of a first compressed air generating unit and a second compressed air generating unit, Each compression operating body of the first compressed air generating part and the second compressed air generating part has a sliding part that slides along the compression chamber, and a cam abutting part that abuts against the cam, The sliding portion slides within a range from a lowermost position where the volume of the compression chamber is maximized to an uppermost position where the volume of the compression chamber is minimized, The cam abutting portion is pressed by the cam when the wheel body rotates relative to the axle, and the sliding portion slides from the lowermost position to the uppermost position along the compression chamber by this pushing. When the sliding portion slides, the air in the compression chamber is compressed, The first compressed air generating part and the second compressed air generating part are arranged so that when any one of the sliding parts slides the compression chamber from the lowermost position to the uppermost position, the other sliding part moves the compression chamber from the uppermost position to the uppermost position. Slide down. 5. The air automatic supply mechanism for pneumatic tires according to claim 1, wherein the compressed air generator includes a compression chamber, a compression operation body for compressing the air in the compression chamber, and a compression operation body for compressing the air in the compression chamber. into the air inlet of the compression chamber, The compression operation body has a sliding portion that slides along the compression chamber within a range from a lowermost position where the volume of the compression chamber is maximized to an uppermost position where the volume of the compression chamber is minimized. When rotating relative to the axle, when sliding along the compression chamber from the lowest position to the uppermost position, the air in the compression chamber is compressed, The air inlet is arranged near a lowermost position within a movement range of a sliding portion that slides the compression chamber from a lowermost position to an uppermost position. 6. The air automatic supply mechanism for pneumatic tires according to claim 1, wherein the compressed air generator is mounted on a hub provided on the wheel main body, so that air can be injected into the compression chamber from the inside of the hub. input, and the input air is compressed. 7. The air automatic supply mechanism for pneumatic tires according to claim 1, wherein the hub is provided with a cylindrical hub shell and support parts that support the hub shell from both sides in the axial direction, and these support parts are passed by Freely rotatably supported on the axle, the hub is free to rotate relative to the axle, and the hub shell and the support part are used to form a partition space part partitioned from the outside of the hub, The waterproof mechanism includes a second air passage formed on the support portion in order to communicate the partitioned space portion of the hub with the outside. 8. The air automatic supply mechanism for pneumatic tires according to claim 7, wherein each support portion of the hub is equipped with a steel ball receiving portion that can roll a plurality of steel balls, and a steel ball receiving portion in the steel ball receiving portion The inner side of the radial direction is used to insert the axle hole of the rotatable axle. By supporting the steel ball receiving part freely rotatably by means of a plurality of steel balls on the axle inserted through the axle hole, the hub can freely rotate relative to the axle. And on each support portion of the hub, according to the manner of respectively passing through the axle gap formed between the inner peripheral surface of the axle hole and the axle and the steel ball gap formed between the steel balls, a space that can be ventilated from the partition space is formed. Extended axle clearance ventilation paths, The second air passage includes at least one of the two axle clearance air passages as a constituent element. 9. The air automatic supply mechanism for pneumatic tires according to claim 8, wherein any one of the two axle gap air passages is substantially sealed from the outside of the hub by a sealing member, and the other axle The gap ventilation path constitutes a part or all of the second ventilation path, The waterproof mechanism includes a third air passage that communicates the other axle gap air passage constituting the second air passage with the outside, and through the third air passage, air outside the hub is ventilated through the other axle clearance. The path goes into the interior of the hub. 10. The air automatic supply mechanism for pneumatic tires according to claim 9, wherein the third air passage is formed by dividing and forming on the inner peripheral surface of a cylindrical body inserted through the axle and mounted on the hub and the path between the outer peripheries of the axles, On the inner peripheral surface of the cylindrical body, there is provided a tapered portion whose inner diameter gradually increases as it goes toward the outer side. 11. The air automatic supply mechanism for pneumatic tires according to claim 1, wherein the compressed air generator includes a compression chamber and a compression operation body for compressing the air in the compression chamber, By disposing the first end of the compression operation body in the compression chamber so as to be slidable, and holding the second end of the compression operation body on the cam provided on the axle, when the wheel main body rotates relative to the axle, the compression operation body is It will follow the cam and slide in the compression chamber to compress the air in the compression chamber. 12 . The automatic air supply mechanism for pneumatic tires according to claim 11 , wherein the compression operation body is detachably held on a cam. 13 . 13. The air automatic supply mechanism for pneumatic tires according to claim 11, wherein the cam has a cam body having a cam surface abutting against the compression operation body on the outer periphery, and a cam body disposed on a side of the cam surface of the cam body. To the operating body holding part, The compression operation body includes a rod-shaped operation body, a cam abutting portion abutting against a cam surface of the cam body, and a cam holding portion held on an operation body holding portion of the cam, The operating body is arranged radially outside the cam surface of the cam body so as to be movable in the radial direction, The cam abutting portion is disposed between the cam surface of the cam body and the operating body, The cam holding portion is detachably held on the operating body holding portion. 14. The automatic air supply mechanism for pneumatic tires according to claim 13, wherein the cam abutting portion is constituted by a part of the outer periphery of the roller rotatably mounted on the operating body, The cam holding portion is constituted by a holding shaft that rotatably supports the roller on the operating body and is held by the operating body holding portion of the cam.

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