JPH1162834A - Reciprocating air compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a cylinder head part and reduce the number of part items and assembling man-hour by sealing a discharge air duct formed in a cylinder head part by a connecting member connecting with the outside. SOLUTION: A delivery valve 8 is provided within a discharge air duct 27 formed in a cylinder head part 6 so as to extend in the direction perpendicular to the sliding direction of a piston 4 and is constituted of a valve element 30 which is abutted on a valve seat 28 formed within this discharge air duct 27 and a spring 31 energizing the valve element 30. A cylindrical tip part 20a of a dryer 20 to be connected with the delivery valve 8 constitutes a connecting member, has a communicating path 20b communicating with the cylinder head part 6 and is connected with the cylinder head part 6 with watertightness via a sealing member 32 such as a proper O-ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating air compressor used for supplying air to an air suspension of an automobile, for example.

[0002]

2. Description of the Related Art As an example of a conventional reciprocating air compressor used for an automobile air suspension, a reciprocating air compressor includes a crankcase, a cylinder, a piston, and a cylinder head, and a cylinder head is provided with an intake valve and a discharge valve. , A reciprocating air compressor in which the piston reciprocates in the cylinder,
For example, it is described in JP-A-6-42462.

[0003] An example of such a conventional reciprocating air compressor is shown in Fig. 6 of the drawings. As shown in the drawing, a conventional reciprocating air compressor 100 includes a crankcase 110, a cylinder 111 and a cylinder 111. , Piston 112, connecting rod 113,
Air is discharged to the outside through the cylinder head 114, a suction valve 127 provided in the cylinder head 114, which opens and closes only in a direction in which air from the outside flows, and an opening formed in the suction valve 127. And a prime mover 101 having a large end 116 of a connecting rod 113 connected to a drive shaft 117.

An electric motor or a hydraulic motor is used for the prime mover 101 and is directly connected to a crankcase 110.
A crank member 118 is attached to an end of one drive shaft 117, and a large end 116 below the connecting rod 113 is attached to a crank pin 119 of the crank member 118.

[0005] The crankcase 110 has a substantially cylindrical cylindrical portion 110a extending in the left-right direction on the paper surface.
The lower end of an upright cylindrical cylinder 111 is fitted and attached to the opening above the cylindrical portion 110a, and a piston 112 is provided so as to reciprocate up and down in the cylinder 111. The piston 112 is moved by the piston pin 120 to the small end 12 above the connecting rod 113.
1 and is reciprocated vertically by the motor 101 via the crank member 118 and the connecting rod 113. Here, when the piston 112 moves downward, the pressure inside the cylinder 111 becomes negative, so that the suction valve 127 is opened, air is sucked from the suction passage 126, and the piston 112 further moves upward. The intake air is compressed and discharged through a discharge valve 115. A cylinder head 114 is mounted on the upper portion of the cylinder 111, and a suction valve 127 and a discharge valve 115 are provided in the cylinder head 114.
5, a dryer 102 is mounted. The dryer 102 is supported by the prime mover 101 by a suitable bracket 103.

[0006]

In such a conventional reciprocating air compressor 100, the discharge valve 115 is mounted on the cylinder head 114 so as to operate in the same direction as the sliding direction of the piston 112, and the discharge valve 115 is mounted on the cylinder head 114. The flow path 122 is formed by a hole, a groove, or the like in a direction perpendicular to the operation direction of the discharge valve 115. Therefore, in the reciprocating air compressor 100 having such a structure, the cover 1 is moved in the direction opposite to the valve seat 123 of the discharge valve 115 provided in the cylinder head 114.
24, an O-ring 125 or a gasket (not shown) or the like, so that the structure of the reciprocating air compressor becomes complicated, and the number of parts increases.
There are problems such as the number of steps required for assembling the parts, the complexity of the structure and processing of the cylinder head 114 for mounting the discharge valve 115, and the like.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a conventional problem by sealing a discharge air passage formed in a cylinder head with a connecting member connecting the cylinder head to the outside. An object of the present invention is to provide a reciprocating air compressor capable of simplifying the structure of the above and reducing the number of parts and the number of assembling steps.

[0008]

In order to solve the above-mentioned problems, a reciprocating air compressor according to the present invention has a reciprocating air compressor in which a piston reciprocates in a cylinder. A discharge air flow path, a valve seat provided in the discharge air flow path, a discharge valve for communicating the discharge air flow path with the outside when separated from the valve seat, an urging member having one end in contact with the discharge valve, and the urging member A support member for supporting the other end of the member, a connecting member fitted to the opening of the discharge air flow path and communicating the discharge air flow path to the outside, and sealing a fitting portion between the connection member and the discharge air flow path; It is characterized by having a sealing member.

Further, in the reciprocating air compressor of the present invention, the first discharge air passage opening in the cylinder is opened from the cylinder side in the sliding direction of the piston, and is substantially perpendicular to the first discharge air passage. , A second discharge air flow path is opened from the outside,
A discharge valve is provided in the second discharge air flow path by connecting the first and second discharge air flow paths.

Further, in the reciprocating air compressor according to the present invention, the connecting member is a dryer.

Further, the reciprocating air compressor according to the present invention comprises:
The support member for supporting the other end of the urging member may be an end of the connecting member.

Further, in the reciprocating air compressor according to the present invention, a communication passage is provided for communicating the discharge air passage with the outside when the discharge valve comes into contact with a support member supporting the other end of the biasing member. Features.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A reciprocating air compressor according to the present invention is a reciprocating air compressor in which a piston reciprocates in a cylinder, wherein a discharge air flow path is provided in a cylinder head portion, and a valve seat is a cylinder head portion. The discharge air flow path is formed in the discharge air flow path formed when the discharge valve is separated from the valve seat, the discharge air flow path communicates with the outside, one end of the urging member is in contact with the discharge valve, the other of the urging member The end is supported by the support member, the connecting member is fitted into the opening of the discharge air flow path, the discharge air flow path is communicated to the outside, and the fitting portion between the connecting member and the discharge air flow path is sealed by a seal member. Therefore, the number of parts and the number of assembling steps can be reduced because a cover and an O-ring are not required. Furthermore, when a gasket is used for sealing, an airtightness assurance step is not required. Becomes

In the reciprocating air compressor according to the present invention, the first discharge air flow path is opened from the cylinder side in the sliding direction of the piston, and the second discharge air flow path is substantially perpendicular to the first discharge air flow path. The discharge air flow path is opened from the outside and the first and second discharge air flow paths are communicated with each other, so that the structure of the cylinder head can be simplified, and the discharge valve can be moved substantially in the piston sliding direction. The cylinder head portion can be thinned while being arranged at a right angle, and the weight can be reduced.

Further, in the reciprocating air compressor of the present invention, since the connecting member is a dryer, there is no need for piping for communicating with the dryer.

Furthermore, in the reciprocating air compressor according to the present invention, since the supporting member for supporting the other end of the urging member is the end of the connecting member, a supporting member for newly supporting the other end of the urging member is provided. The member does not need to be specially provided.

Also, in the reciprocating air compressor of the present invention, the connecting member is provided for communicating the discharge air flow path with the outside when the discharge valve comes into contact with the support member supporting the other end of the urging member. In addition, air can be sent out even when the discharge valve remains in contact with the support member.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings.

[0019]

1 and 3 show a first and a second embodiment of a reciprocating air compressor according to the present invention. The first and the second embodiments each employ a dryer for a discharge valve. The only difference is whether or not a support member such as a chrysanthemum washer is provided on the connection side.

As shown in FIGS. 1 and 2, in a first embodiment of a reciprocating air compressor according to the present invention, a reciprocating air compressor 1 includes a crankcase 2, a cylinder 3, a piston 4, A connecting rod 5, a cylinder head 6, a suction valve 7 and a discharge valve 8 provided in the cylinder head 6,
The large end 11 of the connecting rod 5 has a prime mover 9 connected to a drive shaft 10, and the prime mover 9 is directly connected to the crankcase 2 using an electric motor or a hydraulic prime mover. Also,
A crank member 12 is attached to an end of a drive shaft 10 of the motor 9, a large end 11 below the connecting rod 5 is attached to a crank pin 13 of the crank member 12, and a dryer 20 is connected to the discharge valve 8. That is, the basic structure is substantially the same as that of the conventional example described above.

In such a reciprocating air compressor of the present invention, the crankcase 2 has a substantially cylindrical cylindrical portion 14, and the cylindrical cylinder 3 stands upright in an opening 15 above the cylindrical portion 14. The piston 4 is provided so as to reciprocate up and down in the cylinder 3.
The piston 4 is connected to a small end 19 above the connecting rod 5 by a piston pin 18, reciprocated vertically by the motor 9 via the crank member 12 and the connecting rod 5, and receives air from the outside via the suction valve 7. , The compressed air is compressed, and then discharged through the discharge valve 8.

A cylinder head 6 is provided above the cylinder 3.
The cylinder head 6 is provided with a suction valve 7 and a discharge valve 8.
The dryer 20 is mounted on the discharge valve 8 side via a discharge valve 8 and a support member 22 such as a chrysanthemum washer. Further, the dryer 20 is provided with an appropriate bracket 21.
Supported by the prime mover 9.

The suction valve 7 is a so-called check valve configured so that only suction is performed by a negative pressure generated when the piston 4 operates downward in the drawing. That is, as shown in FIGS. 2 and 4, the suction valve 7 is formed by forming a U-shaped slit 26 in a valve plate 25 made of a thin plate material to form a valve body 24 in a bellows shape. When a negative pressure is generated by an operation, for example, a downward operation in FIG. 1, a bellows-shaped valve element 24 of the intake valve 7 operates downward to open an intake port 23, and air is opened from the opened intake port 23. And the like are drawn into the cylinder 3. Therefore, at the time of discharge, the bellows-shaped valve element 24 of the valve plate 25
, So that the suction port 23 is firmly closed. On the other hand, the discharge valve 8 in the discharge air passage 27 communicates with the inside of the cylinder 3 via the slit 26 and the discharge air passage 26a.

The discharge valve 8 is provided in a discharge air flow passage 27 formed in the cylinder head portion 6 so as to extend in a direction perpendicular to the sliding direction of the piston 4, that is, in a lateral direction in the drawing, and in the discharge air passage 27. A valve body 30 in contact with a valve seat 28 formed in the flow path 27, and a spring 3 for urging the valve body 30
One end of the spring 31 is in contact with the valve body 30, and the other end of the spring 31 is supported by a support member 22 such as a chrysanthemum washer. When the piston 4 is operated upward, for example, When the air sucked into the cylinder 3 is compressed and reaches a predetermined compression pressure, the discharge valve 8 is opened to operate to discharge the compressed air. Further, even when the discharge valve 8 contacts the support member 22, the air can be discharged and sent out based on the structure of the support member 22 such as a chrysanthemum washer. The discharge air flow path 27
Is not limited to the direction perpendicular to the sliding direction of the piston 4, but may be the same direction as the sliding direction.

The cylindrical end 20a of the dryer 20 connected to the discharge valve 8 having the above-described structure constitutes a connecting member, and has a communication passage 20b communicating with the cylinder head 6. And is watertightly connected to the cylinder head 6 via a seal member 32 such as an appropriate O-ring.

FIG. 3 shows a second embodiment of the reciprocating air compressor of the present invention. As shown in FIG. 3, the end 20a of the dryer 20 is mounted on the cylinder head 6, and A dryer 20 is connected to the discharge valve 8 of the cylinder head 6. Also in this second embodiment, the first
Similarly to the embodiment, the reciprocating air compressor 1 includes a crankcase 2, a cylinder 3, a piston 4, a connecting rod 5,
A cylinder head 6, a suction valve 7 and a discharge valve 8 provided in the cylinder head 6, and a motor 9 such as an electric motor or a hydraulic motor in which a large end 11 of the connecting rod 5 is connected to a drive shaft 10. doing.

In such a reciprocating air compressor according to the second embodiment of the present invention, the crankcase 2
The cylinder 3 is mounted upright on the cylinder 3
A piston 4 is provided so as to reciprocate up and down in the inside. The piston 4 is connected to the small end 19 of the connecting rod 5 by a piston pin 18, and the motor 9 rotates the crank member 1.
2 and the connecting rod 5 reciprocate up and down, and the suction valve 7
, And is configured to compress the sucked air, and then discharge the compressed air via the discharge valve 8. A cylinder head 6 is mounted on the upper part of the cylinder 3.
Is provided with a suction valve 7 and a discharge valve 8. The suction valve 7 is provided on the compression chamber side of the cylinder head section 6, and a dryer 20 is mounted on the discharge valve 8 side via the discharge valve 8. Further, the dryer 20 is similarly supported on the prime mover 9 by an appropriate bracket 21.

The suction valve 7 is configured so that only suction is performed by a negative pressure generated when the piston 4 is operated downward in the drawing.
Is actuated downward to open the suction port 23 and suck air or the like into the cylinder 3 from the suction port 23. Therefore, at the time of discharge, the valve 24 acts so as to close the suction port 23, so that the suction port 23 is firmly closed. On the other hand, the discharge valve 8 in the discharge air passage 27 communicates with the inside of the cylinder 3 via the slit 26 and the discharge air passage 26a.

The discharge valve 8 is provided in a discharge air passage 27 formed in the cylinder head portion 6 so as to extend in a direction perpendicular to the sliding direction of the piston 4, that is, in a lateral direction in the drawing, A valve body 30 in contact with a valve seat 28 formed in the flow path 27, and a spring 3 for urging the valve body 30
One end of the spring 31 is in contact with the valve body 30, and the other end of the spring 31 is in contact with the end 20 a of the dryer 20 mounted on the cylinder head 6. Further, as shown in FIG. 5, a notch 20c is provided at the end 20a of the dryer 20 as a communication path for communicating the discharge air flow path 27 with the outside when the discharge valve 8 contacts. Can always be surely communicated with the discharge air passage 27. Furthermore, the lift amount A of the discharge valve 8
Can be suitably regulated by the end 20a of the dryer 20.

In the reciprocating compressor according to the second embodiment of the present invention, the discharge valve 8 is formed on the cylinder head 6 so as to extend in a direction perpendicular to the sliding direction of the piston 4. The valve element 3 provided in the discharge air flow path 27 and abutting on a valve seat 28 formed in the discharge air flow path 27
0, and a spring 31 for urging the valve body 30. One end of the spring 31 is in contact with the valve body 30, and the other end of the spring 31 is supported by the end 20 a of the dryer 20. When the piston 4 operates, for example, upward, the air sucked into the cylinder 3 is compressed, and when a predetermined compression pressure is reached, the discharge valve 8 is opened to operate to discharge the compressed air. ing.

The dryer 2 connected to such a discharge valve 8
The zero cylindrical end 20a is likewise watertightly connected to the cylinder head 6 via a suitable sealing member 32 such as an O-ring.

Further, the lift amount A of the discharge valve 8 is
It is configured such that it can be suitably regulated by the zero end 20a.

[0033]

According to the reciprocating air compressor of the present invention thus constructed, a discharge air flow path is formed in the cylinder head in a direction perpendicular to the sliding direction of the piston. And a discharge valve is disposed in the discharge air flow path with respect to the valve seat. Therefore, the discharge valve is disposed in the discharge air flow path formed in the cylinder head. When the valve is separated, the discharge air flow path communicates with the outside, one end of the urging member abuts on the discharge valve, the other end of the urging member is supported by the support member, and the connecting member is the opening of the discharge air flow path. And a seal member for communicating the discharge air flow path to the outside and sealing a fitting portion between the connection member and the discharge air passage, so that a dryer or the like is directly connected to the discharge air flow path as a connection member. Can be connected, and the dryer as the connecting member is connected As a result, the discharge valve can be mounted so as to regulate the lift amount, thereby eliminating the need for a sealing structure on the side opposite to the valve seat of the discharge valve, thereby reducing the number of assembly steps for connecting members such as a dryer and the discharge valve and the like. In addition, the structure of the cylinder head can be simplified, the thickness and weight can be reduced, and the number of parts and the number of assembling steps can be reduced because a cover and an O-ring are not required. Furthermore, if the gasket was used for sealing, the part would be eliminated and the airtightness assurance process of the sealed part would not be necessary.By making the connecting member a dryer, piping for communicating with the dryer was not required, and a new pipe was required. There is no need to provide a support member for supporting the other end of the biasing member, and air can be sent out even when the discharge valve remains in contact with the support member. Therefore, it is possible to significantly reduce the manufacturing cost. And the like.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional side view of a first embodiment of a reciprocating air compressor according to the present invention.

FIG. 2 is an enlarged partial sectional view of a discharge valve portion of the reciprocating air compressor of the present invention shown in FIG.

FIG. 3 is a similar schematic side view partially sectioned in a second embodiment of the reciprocating air compressor of the present invention.

FIG. 4 is a perspective view of a valve plate portion of a suction valve of the reciprocating air compressor according to the present invention.

FIG. 5 is a perspective view showing a dryer end in a second embodiment of the reciprocating air compressor of the present invention.

FIG. 6 is a schematic side view, partially in section, of a prior art reciprocating air compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reciprocating air compressor 2 Crank case 3 Cylinder 4 Piston 5 Connecting rod 6 Cylinder head part 7 Suction valve 8 Discharge valve 9 Prime mover 10 Drive shaft 11 Large end part 12 Crank member 13 Crank pin 14 Cylindrical part 15 Opening 18 Piston pin DESCRIPTION OF SYMBOLS 19 Small end part 20 Dryer 20c Communication path 21 Bracket 22 Support member 23 Inlet 24 Valve body 25 Valve plate 26 Slit 27 Discharge air flow path 28 Valve seat 30 Valve body 31 Energizing member 32 Seal member

Claims (5)

[Claims] 1. A reciprocating air compressor for compressing air by a piston reciprocating in a cylinder, a discharge air flow passage formed in a cylinder head portion, a valve seat provided in the discharge air flow passage, and the valve. A discharge valve that communicates the discharge air flow path with the outside when separated from a seat, an urging member having one end in contact with the discharge valve, a support member supporting the other end of the urging member, an opening of the discharge air flow path A reciprocating air compressor, comprising: a connecting member fitted to the portion and communicating the discharge air flow path to the outside, and a seal member sealing a fitting portion between the connection member and the discharge air flow path. 2. A first discharge air passage opening into a cylinder is opened in a piston sliding direction from a cylinder side, and a first discharge air passage is opened from a cylinder side.
A second discharge air flow path is opened from the outside in a direction substantially perpendicular to the discharge air flow path, and a discharge valve is provided in the second discharge air flow path by connecting the first and second discharge air flow paths. The reciprocating air compressor according to claim 1, wherein 3. The reciprocating air compressor according to claim 1, wherein the connecting member is a dryer. 4. The reciprocating air compressor according to claim 1, wherein the supporting member supporting the other end of the urging member is an end of the connecting member. 5. The communication device according to claim 1, wherein a communication path is provided for communicating the discharge air flow path with the outside when the discharge valve comes into contact with a support member supporting the other end of the urging member. The reciprocating air compressor according to claim 1.