JP2009154565A - Pillion step installing structure of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pillion step installing structure of a motorcycle capable of reducing effect of external force on a vehicle body, with a simple constitution, without increasing the number of part items. <P>SOLUTION: The pillion step installing structure includes a pillion step 120 being a foot rest of an occupant, and a pillion step holder 110 for installing this pillion step 120. The pillion step holder 110 is arranged in the vicinity of a pair of right-left pivot bearings 13 and 13 installed in a vehicle body frame 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a motorcycle, and more particularly to a pillion step mounting structure for a motorcycle.

Conventionally, a fuel cell-equipped motorcycle has been proposed that includes a fuel cell and a fuel cylinder that supplies fuel to the fuel cell, and that travels by driving a motor for driving the vehicle based on electric power supplied from the fuel cell. (For example, refer to Patent Document 1).
JP 2006-56376 A

By the way, since this type of motorcycle is equipped with many precise and expensive members such as a fuel cell, it is desirable to prevent external force from being applied to the vehicle body having these members.
Here, in order to prevent external force from being applied to the vehicle body, it may be possible to provide a dedicated protective member on the vehicle body. However, in this case, there is a problem that the number of parts increases and the configuration of the vehicle body becomes complicated. .

  An object of the present invention is made in view of the above-described circumstances, and provides a pillion step mounting structure for a motorcycle that can reduce the influence of external force on the vehicle body with a simple configuration without increasing the number of parts. It is in.

In order to solve the above-described problems, the present invention provides a vehicle body frame, a pair of left and right pivot portions attached to the vehicle body frame, and is pivotally supported by the vehicle body frame via the pivot portions and mounted with drive wheels. A swing arm, a driver seat supported on the upper part of the vehicle body frame, a passenger seat connected to the driver seat, and a pillion step that serves as a footrest portion for the passenger when seated on the passenger seat; In the pillion step mounting structure for a motorcycle including the pillion step holder to which the pillion step is mounted, the pillion step holder is provided in the vicinity of the pivot portion.
According to the present invention, since the pillion step holder is provided in the vicinity of the pivot portion having high rigidity, the pillion step holder projects from the pivot portion in the vehicle width direction of the vehicle body. For this reason, when the vehicle body is inclined at a predetermined angle, the pillion step holder protects the vehicle body, so that the influence of external force on the vehicle body can be reduced. In addition, since the pillion step holder also serves as a protective member that protects the vehicle body, there is no need to provide a dedicated protective member, so the influence of external force on the vehicle body can be reduced with a simple configuration without increasing the number of parts. Can do.

  In the above configuration, the pillion step may be foldably attached to the pillion step holder. According to this configuration, when there is no passenger, by folding the pillion step, the amount of protrusion in the vehicle width direction can be suppressed, and the vehicle body can be made compact.

  Moreover, the said structure WHEREIN: The said pillion step holder is good also as a structure provided coaxially with the pivot axis | shaft supported by the said pivot part. According to this configuration, since the end portion of the pivot shaft is covered by the pillion step holder, it is possible to improve the aesthetic appearance of the pivot portion. Furthermore, since the pillion step holder also serves as a cover member that covers the pivot shaft, it is not necessary to provide a dedicated cover member for the pivot portion, and the number of parts can be reduced.

  In the above configuration, the vehicle driving motor for driving the driving wheel and a fuel cell for supplying electric power to the vehicle driving motor are provided, and the fuel cell is disposed inside and in the vicinity of the left and right pivot portions. It is good also as a structure. According to this configuration, the fuel cell is disposed inside and in the vicinity of the pivot portion, which is a highly rigid portion in the vehicle body frame, so that the fuel cell is provided by the pivot portion and the pillion step holder provided in the vicinity of the pivot portion. Protected. For this reason, when the vehicle body is inclined at a predetermined angle, the influence of external force on the fuel cell can be reduced.

According to the present invention, since the pillion step holder is provided in the vicinity of the pivot portion having high rigidity, when the vehicle body is inclined at a predetermined angle, the car body can be protected by the pillion step holder, and the influence of external force on the vehicle body can be reduced. Can be reduced. In addition, since the pillion step holder also serves as a protective member that protects the vehicle body, there is no need to provide a dedicated protective member, so the influence of external force on the vehicle body can be reduced with a simple configuration without increasing the number of parts. Can do.
In addition, since the pillion step is foldably attached to the pillion step holder, when there is no passenger, the pillion step can be folded to suppress the amount of protrusion in the vehicle width direction, thereby reducing the size of the vehicle body. be able to.
Further, since the pillion step holder is provided coaxially with the pivot shaft supported by the pivot portion, the end of the pivot shaft is covered with the pillion step holder, so that the aesthetic appearance of the pivot portion can be improved. Furthermore, since the pillion step holder also serves as a cover member that covers the pivot shaft, it is not necessary to provide a dedicated cover member for the pivot portion, and the number of parts can be reduced.
In addition, since the vehicle driving motor for driving the drive wheels and a fuel cell for supplying electric power to the vehicle driving motor are disposed inside and in the vicinity of the left and right pivot parts, the fuel cell is It is protected by a pivot portion which is a highly rigid portion in the vehicle body frame and a pillion step holder provided in the vicinity of the pivot portion. For this reason, when the vehicle body is inclined at a predetermined angle, the influence of external force on the fuel cell can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the description, descriptions of directions such as front and rear, left and right, and top and bottom follow the directions as viewed from the driver who gets on the vehicle body.
FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention, and FIG. 2 is a rear view of the motorcycle.
The motorcycle 1 is a fuel cell motorcycle that travels by driving a motor 52 for driving a vehicle based on electric power supplied from a fuel cell 51 mounted substantially in the center of the vehicle body. The motorcycle 1 has a space (U-shaped space) S recessed in a substantially U shape in front of the seat 20, that is, a scooter having a leg straddling space S when a passenger (driver) gets on and off. It is configured as a type vehicle.

  The motorcycle 1 is connected to a body frame 2, a pair of left and right front forks 5 connected to a lower end of a steering stem 4 rotatably supported by a head pipe 3 of the body frame 2, and an upper end of the steering stem 4. A steering handle 6, a front wheel 7 rotatably supported by the front fork 5, a power unit 8 also serving as a swing arm supported swingably up and down at the rear of the body frame 2, and a rear of the power unit 8. A rear wheel (driving wheel) 9 rotatably supported at the end, a rear cushion 10 disposed between the power unit 8 and the vehicle body frame 2, and a seat 20 supported at a substantially central upper portion of the vehicle body frame 2. And. The seat 20 is integrally formed with a driver's seat 20A on which the driver is seated and a passenger's seat 20B on which the passenger sits.

The vehicle body frame 2 includes a pair of left and right upper frames 11 and 11 extending from the head pipe 3 to the rear of the vehicle body, and a pair of left and right lower frames 12 and 12 extending from the head pipe 3 and extending downward to the vehicle body and extending rearward of the vehicle body. The rear ends of the upper frames 11 and 11 and the rear ends of the lower frames 12 and 12 are connected via a pair of left and right pivot bearings (pivot portions) 13 and 13. A pivot shaft extending horizontally in the vehicle width direction is supported by the pair of left and right pivot bearings 13, 13, and the power unit 8 is connected to the vehicle body frame 2 through the pivot shaft so as to swing up and down. The power unit 8 houses a motor driver 53 and a motor 52 as a drive source in the casing.
The upper frames 11 and 11 include a first inclined portion 11A that extends obliquely downward from the head pipe 3, a horizontal portion 11B that bends from the rear end of the first inclined portion 11A and extends horizontally rearward of the vehicle body, Each of the second inclined portions 11C extends in an inclined manner from the rear end of the horizontal portion 11B. In addition, a pair of left and right seat support frames 14 and 14 that extend rearward and support the seat 20 are joined to the front portion of the second inclined portion 11C. The first inclined portion 11A, the horizontal portion 11B, and the seat support frames 14 and 14 of the upper frame 11 secure a leg straddle space S that is recessed in a substantially U shape in front of the seat 20 in a side view of the vehicle body. Is done.

A pair of left and right subframes 16 and 16 are connected to the rear ends of the seat support frames 14 and 14 via a pair of left and right frame connecting members 15 and 15. The subframes 16 and 16 extend to the lower side of the vehicle body and extend to the left and right. It is connected to a pair of pivot bearings 13 and 13. Further, both ends of a pivot cross frame 21 curved downward are connected to the pivot bearings 13 and 13, respectively.
A pair of left and right rear frames 17 and 17 extending rearward of the vehicle body are connected to the sub frames 16 and 16. The rear frames 17, 17 include restraint bands 18, 18 that restrain two fuel cylinders 22, 22 arranged side by side (see FIG. 2), and a fuel cylinder 22 restrained by the restraint bands 18, 18. , 22 are attached to guard pipes 19, 19 for guarding the sides. The upper portions of the guard pipes 19 and 19 are connected to plate members 19A and 19A that wrap around the passenger seat 20B of the seat 20 to cover the fuel cylinders 22 and 22 and extend to the left and right of the protector 35 that also serves as a rear cowl. Thus, the upper and left and right sides of the fuel cylinders 22 and 22 are guarded.
The protector 35 is made of a rigid material, for example, a metal such as a light metal (aluminum, tungsten, magnesium, etc.) or a reinforced resin such as glass fiber or FRP, and is bolted to the restraining bands 18 and 18. At the same time, a pair of left and right tip portions 35A, 35A extending forward of the vehicle body are bolted to the frame connecting members 15, 15 of the vehicle body frame 2 and supported by the vehicle body. The rubber member 38 inserted in the gap between the fuel cylinders 22 and 22 functions as a buffer material.

  As shown in FIG. 1, the vehicle body frame 2 is formed in a cradle type, that is, a saddle type, and a space (equipment placement area) surrounded by the saddle type vehicle body frame 2 includes a fuel cell 51. Electric power generated by an engine (power generation engine) 50, an ECU case 71 that houses an electronic control unit (ECU) 70 that controls each part of the fuel power generation engine 50 and the motorcycle 1, and a fuel power generation engine (power generation engine) 50 A voltage regulator (VCU) 75 for adjusting the power and a battery 80 as a secondary battery for storing the electric power are disposed. A pair of left and right radiators 90, 90 are arranged on the left and right of the front part of the vehicle body frame 2, and cooling water for cooling the fuel cell 51 is supplied to the radiators 90, 90 via a water pump 91. .

  In the motorcycle 1, the vehicle body is covered with a vehicle body cover 40 mainly made of a rigid resin. Specifically, the vehicle body cover 40 includes a front cover 40A that covers the front portion of the vehicle body frame 2 and a leg that covers the front of the driver's feet placed on a pair of left and right step floors 26 and 26 (see FIG. 2). A shield 40 </ b> B, a center cover 40 </ b> C that covers the center of the vehicle body frame 2, and an under cover 40 </ b> D that covers the lower part of the vehicle body frame 2 are provided.

Next, an overall outline of the fuel power generation engine 50 will be described with reference to FIG.
First, the fuel cell 51 is a well-known polymer electrolyte fuel cell (PEMFC) in which a large number of unit cells (unit cells) are stacked. Hydrogen gas is supplied to the anode side as fuel gas, and the cathode side is supplied. By supplying air containing oxygen as an oxidant gas, electric power is generated and water is generated by an electrochemical reaction.
The fuel power generation engine 50 including the fuel cell 51 includes a hydrogen gas supply unit 55 that supplies high-pressure hydrogen gas filled in the fuel cylinders 22 and 22 to the fuel cell 51, and an air supply unit that supplies air to the fuel cell 51. 58 and a surplus gas circulation unit 61 for circulating the surplus hydrogen gas after being used for power generation in the fuel cell 51 to the fuel cell 51 for reuse.

  The hydrogen gas supply unit 55 includes fuel cylinders 22 and 22, a pressure adjustment unit 56, and an ejector unit 57, and the air supply unit 58 includes an air cleaner 59 and a supercharger 60. The surplus gas circulation unit 61 includes a humidifier 62, a gas-liquid separator 63, a dilution box 64, a front exhaust pipe 65A, a silencer 66 connected to the front exhaust pipe 65A, and a silencer 66. And a connected rear exhaust pipe 65B.

  The high-pressure hydrogen gas filled in the fuel cylinders 22 and 22 is adjusted to the supply pressure by the manual valve 56A, the electromagnetic shut-off valve 56B, the first regulator 56C, the second regulator 56D, etc. included in the pressure regulating unit 56, and is ejected by the ejector unit. 57. The hydrogen gas supplied to the ejector unit 57 is cooled by a heat exchanger 57 </ b> A included in the ejector unit 57. The cooled hydrogen gas is adjusted to a predetermined pressure by the ejector 57B and the differential pressure regulator 57C and supplied to the fuel cell 51. Here, the ejector 57B sucks not only the hydrogen gas supplied from the pressure adjusting unit 56 but also the unreacted hydrogen gas separated from the gas-liquid separator 63 with a negative pressure and supplies it to the fuel cell 51. The pressure regulator 57 </ b> C adjusts the hydrogen gas to a predetermined pressure with respect to the pressure on the air side and supplies it to the fuel cell 51.

Further, the air purified by the air cleaner 59 of the air supply unit 58 is supplied to the fuel cell 51 by being pressurized to a predetermined pressure by the supercharger 60. More specifically, the air pressurized by the supercharger 60 is humidified by the humidifier 62 or supplied to the fuel cell 51 through the bypass path R1 that opens the bypass valve 58A and bypasses the humidifier 62. Is done. The bypass valve 58A is opened at a low temperature start or the like.
For this reason, the fuel cell 51 is supplied with hydrogen gas as a fuel gas on the anode side, and supplied with air containing oxygen as an oxidant gas on the cathode side to generate electric power and water with an electrochemical reaction. Generate.

The hydrogen gas supplied to the power generation by the fuel cell 51 is supplied to the gas-liquid separator 63 as a wet surplus gas, and the unreacted hydrogen gas from which water has been separated by the gas-liquid separator 63 is returned to the return path R2. To the ejector 57B.
Further, part of the water generated by the fuel cell 51 is introduced into the humidifier 62 as water vapor along with air (off-gas) discharged from the fuel cell 51, taken in from the air cleaner 59, and compressed by the supercharger 60. Supplied to humidify air (oxidant gas).
As described above, the hydrogen gas extracted by the gas-liquid separator 63 is reused in the fuel cell 51. However, since the impurity concentration increases as the reuse continues, the electromagnetic valve 61A is sometimes opened and discharged appropriately. The discharged hydrogen gas is introduced into the dilution box 64 and diluted with the off gas of the fuel cell 51 introduced into the dilution box 64 via the humidifier 62. The diluted gas is discharged to the outside air via the front exhaust pipe 65A, the silencer 66, and the rear exhaust pipe 65B.

The operation of the fuel power generation engine 50 is controlled by an electronic control unit (ECU) 70. Then, the electric power generated by the fuel cell 51 is adjusted in voltage by a voltage regulator (VCU) 75 under the control of the electronic control unit 70, supplied to the motor 52 as drive power via the motor driver 53, and surplus Electric power is stored in the battery 80.
Further, the electronic control unit 70 receives an acceleration request signal corresponding to an operation of a throttle grip 6A (see FIG. 2) provided on the handle 6, and drives and controls the motor 52 in accordance with the signal. The motor 52 is configured as a three-phase AC motor that is supplied and driven after the DC current from the fuel cell 51 or the battery 80 is converted into a three-phase AC current by the motor driver 53.

Next, the arrangement of various components such as the fuel power generation engine 50 will be described.
As shown in FIG. 1, the fuel cell 51 is disposed obliquely at a substantially central position in the front-rear direction of the vehicle body frame 2. An ECU case 71 that houses the electronic control unit 70 is disposed between the fuel cell 51 and the seat 20 above, and is connected to the output side of the fuel cell 51 below the fuel cell 51. A liquid separator 63 and a dilution box 64 are arranged close to each other.
At the front part of the dilution box 64, a humidifier 62 connected to the dilution box 64 and a supercharger 60 connected to the humidifier 62 are arranged in order toward the front of the vehicle body, and the humidifier 62 and A voltage regulator 75 is disposed above the supercharger 60, that is, between the leg straddle space S.

In this arrangement, a relatively heavy component, that is, a fuel cell 51, a humidifier 62, a supercharger 60, and a voltage regulator 75 constituting main components of the fuel power generation engine 50 are arranged in the vehicle body frame in the vehicle longitudinal direction. Therefore, the layout efficiency can be improved, and the length of the piping path connecting the components and the wiring path length with the electronic control unit 70 can be shortened.
An ion exchanger is disposed on the front side of the voltage regulator 75, and the ion exchanger performs ion exchange processing on the water generated by the fuel cell 51.

Further, as shown in FIG. 1, an air cleaner 59 that is a relatively lightweight part constituting a part of the fuel power generation engine 50 is disposed at the front part of the vehicle body in a box shape that goes around the left and right of the head pipe 3 from the front of the head pipe 3. The vehicle body cover 40 fits in the front cover 40A. For this reason, the space around the head pipe 3 is effectively used as the air cleaner space, the capacity of the air cleaner 59 can be increased, and the intake efficiency can be improved. Further, a front exhaust pipe 65A (not shown in FIG. 1) is connected to the right side of the dilution box 64 (the back side in the drawing in FIG. 1). The front exhaust pipe 65A extends rearward of the vehicle body and extends to the silencer 66. (See FIG. 2).
As shown in FIG. 2, a rear exhaust pipe 65B extends from the rear side of the silencer 66. The rear exhaust pipe 65B is bent toward the center in the vehicle width direction at the rear of the vehicle body, and its outlet 65C is connected to the rear of the vehicle body. It is provided with a slight downward direction. The front exhaust pipe 65A, the silencer 66, and the rear exhaust pipe 65B exhaust exhaust gas from the fuel cell 51 to the outside of the vehicle body, and exhaust exhaust gas mixed with water generated by the fuel cell 51 to serve as a drain pipe. The outlet 65C also functions as a drain outlet.

As shown in FIG. 1, the pair of left and right radiators 90, 90 has a left-right symmetrical shape having a substantially rectangular shape extending in the vertical direction, and the upper part thereof is tilted forward from the lower part to the front side of the vehicle body, It is arranged in an inclined posture and is covered with the leg shield 40B of the vehicle body cover 40, or is accommodated in the leg shield 40B when the leg shield 40B is box-shaped.
Due to this arrangement, the radiators 90, 90 are positioned on the left and right sides of the front fork 5 that supports the front wheel 7 when viewed from the front of the vehicle body, so that traveling wind from the front of the vehicle body is blocked by the front wheel 7 and the front fork 5. Without passing through the radiators 90, 90, the heat exchange efficiency of the radiators 90, 90 can be substantially improved, and the radiators 90, 90 capable of securing a sufficient heat exchange rate can be reduced in size.
Further, as shown in FIG. 1, fans 90A and 90A are attached to the rear sides of the radiators 90 and 90, respectively, and outdoor air is forced to the radiators 90 and 90 by driving the fans 90A and 90A. It is possible to forcibly execute heat exchange (cooling) with cooling water. 1 and 2, reference numeral 92 is a water tank, and the water tank 92 is attached to the rear portion of the head pipe 3.

Further, a battery 80 is disposed in a region between the pair of left and right radiators 90, 90 in the leg shield 40B at the front of the vehicle body. The battery 80 is composed of a plurality of (two in this example) batteries configured separately, and hereinafter, one of the batteries 80 is referred to as a first battery (upper battery) 81 and the other is a second battery ( (Lower battery) 82.
The first battery 81 and the second battery 82 are formed in a substantially rectangular parallelepiped shape extending in the vehicle body width direction, and are spaced apart from each other in the vehicle body vertical direction. More specifically, the first battery 81 is fixed between the lower frames 12 and 12 in the vicinity of the head pipe 3, and as shown in FIG. Arranged in a tilted position.

Further, as shown in FIG. 1, the second battery 82 is fixed between the lower frames 12 and 12 in the vicinity of the bent portions 12A and 12A of the lower frames 12 and 12, and the upper portion is rearward of the vehicle body from the lower portion. It is arrange | positioned with the back leaning attitude | position which made it tilt backward.
Thus, by arranging the first battery 81 in the forward leaning posture, the position of the center of gravity can be made closer to the front of the vehicle body than in the case where the first battery 81 is not tilted forward. Similarly, by arranging the second battery 82 in the backward tilt posture, the center of gravity position can be made closer to the front of the vehicle body than when the second battery 82 is not tilted backward. For this reason, by adjusting the forward tilt angle of the first battery 81 and the rearward tilt angle of the second battery 82, the center of gravity of the battery 80 including the batteries 81 and 82 can be easily adjusted back and forth. Design changes such as bringing the entire center of gravity position closer to the front wheel 7 can be easily performed.

By the way, the motorcycle 1 includes the fuel cell 51 inside the body frame 2 as described above. Since the fuel cell 51 is precise and expensive, it is necessary to prevent external force from being applied to the fuel cell 51.
In this configuration, the vehicle body frame 2 includes a head pipe 3, an upper frame 11, a lower frame 12, a pivot bearing 13, a seat support frame 14, a sub frame 16, and a pivot cross frame 21, as shown in FIG. The rigidity of the vehicle body frame 2 is ensured by connecting and forming the whole into a bowl shape. Here, since the upper frame 11, the lower frame 12, the sub frame 16, and the pivot cross frame 21 are concentratedly connected to the pivot bearing 13, the rigidity of the pivot bearing 13 in the vehicle body frame 2 is increased. Can do.
Further, the power unit 8 that is swingably attached to the pivot bearing 13 via the pivot shaft is provided with a motor driver 53 and a motor 52 as a drive source in the casing, and thus is formed wide in the vehicle width direction. In this case, in order to dispose the wide power unit 8 between the pivot bearings 13 and 13, the vehicle body frame 2 is widened between the left and right pivot bearings 13 and 13, as shown in FIG. Each frame is formed by bending in the vehicle width direction. Therefore, a wide space is formed in the body frame 2 between the left and right pivot bearings 13, and the fuel cell 51 can be arranged in this space with a good layout.
Thus, in the present embodiment, the fuel cell 51 is disposed in the vicinity of and inside the pivot bearings 13 and 13 having a high rigidity of the body frame 2 and a wide space. For this reason, since the fuel cell 51 is protected by the pivot bearing 13 having high rigidity and each frame connected to the pivot bearing 13, the influence of external force on the fuel cell 51 can be reduced.

  Since the body frame 2 is formed wide between the pivot bearings 13 and 13, the pivot bearing 13 protrudes most in the vehicle width direction in the body frame 2. In the present embodiment, as shown in FIG. 5, when the passenger sits on the passenger seat 20 </ b> B (FIG. 1), the pivot bearing 13 is provided with a pillion step portion 100 that serves as a leg raising portion of the passenger. ing. The pillion step unit 100 includes a pillion step holder 110 attached to the pivot bearing 13 and a pillion step 120 supported by the pillion step holder 110 so as to be foldable.

  The pillion step holder 110 is formed by casting a light metal having high rigidity (for example, aluminum, tungsten, magnesium, etc.). By attaching the pillion step holder 110 to the pivot bearing 13, the pillion step holder 110 is It will protrude further in the vehicle width direction. For this reason, when the motorcycle 1 is inclined at a predetermined angle, the pillion step holder 110 protects the vehicle body frame 2 and the fuel cell 51, so that the influence of external force on the fuel cell 51 can be reduced. In particular, in this embodiment, since the pillion step holder 110 made of a highly rigid material is attached to the highly rigid pivot bearing 13, the influence of external force on the fuel cell 51 can be more effectively reduced.

  On the upper surface of the pillion step holder 110, a groove portion 111 that holds the pillion step 120 when the pillion step 120 is tilted substantially horizontally outward is formed. The groove 111 has substantially the same shape as the pillion step 120. In addition, an inclined surface portion 113 that is inclined upward toward the distal end portion is formed on the lower surface on the distal end side of the pillion step holder 110. The slope 113 is for preventing the pillion step holder 110 protruding in the vehicle width direction from coming into contact with the road surface when the motorcycle 1 is tilted during traveling.

On the other hand, like the pillion step holder 110, the pillion step 120 is formed by casting a light metal (for example, aluminum, tungsten, magnesium, etc.) having high rigidity. The pillion step 120 is formed in substantially the same shape as the groove portion 111 of the pillion step holder 110, and specifically, is formed so as to become thinner from the root portion toward the tip portion. Moreover, the recessed part 121 is provided in the lower surface of the pillion step 120, and the weight of the pillion step 120 is achieved.
The pillion step 120 is rotatably supported by the shaft portion 130 with respect to the groove portion 111. That is, the pillion step 120 is rotatable between a use position when tilted substantially horizontally outward and a stowed storage position (FIG. 5). In this embodiment, the pillion step 120 is moved from the use position to the storage position. It is said to fold to rotate.
In addition, a positioning member such as a click plate (not shown) is disposed between the side surface 112 of the groove 111 of the pillion step holder 110 and the pillion step 120, and the pillion step 120 is in the above-described use position or storage position. Positioning is ensured.

Next, a structure for attaching the pillion step portion 100 to the pivot bearing 13 will be described. As shown in FIG. 6, the pivot bearing 13 is provided at a cylindrical portion 13A to which the upper frame 11, the lower frame 12, the sub frame 16, and the pivot cross frame 21 are respectively connected, and at an end of the cylindrical portion 13A on the inner side of the vehicle body. Bearing portion 13B. A pivot shaft (pivot bolt) 25 extending horizontally in the vehicle width direction is supported by the pair of left and right bearing portions 13B, 13B, and the power unit 8 is connected to the vehicle body frame 2 through the pivot shaft 25 so as to be swingable up and down. Is done. Further, an inner flange 13 </ b> C extending inside the cylindrical portion 13 </ b> A is formed at the outer end of the cylindrical portion 13 </ b> A on the vehicle body. The inner flange 13C includes a screw hole 13D, and the pillion step holder 110 is attached with a bolt or the like through the screw hole 13D. In the present embodiment, a pair of inner flanges 13C and 13C are formed in the vertical direction of the cylindrical portion 13A, and the pair of inner flanges 13C and 13C are provided on the diameter of the cylindrical portion 13A.
According to this embodiment, since the bolt which connects the pivot bearing 13 and the pillion step holder 110 is not exposed to the outside, the aesthetic appearance can be improved.

On the other hand, the pillion step holder 110 is formed to have substantially the same diameter as the cylindrical portion 13A of the pivot bearing 13 and is disposed on the pivot shaft 25 supported by the bearing portion 13B of the pivot bearing 13. Thereby, the pivot shaft 25 is covered by the pillion step holder 110, and the pivot shaft 25 is not exposed to the outside.
Further, the pillion step holder 110 is provided with a hole for screwing at a position corresponding to the inner flanges 13C, 13C of the pivot bearing 13. Although not shown in the drawings, these holes are provided one by one on the back surface 114 of the groove 111 and the inclined surface 113, and through these holes, bolts 13 D are formed in the inner flange 13 C of the pivot bearing 13. Secure with etc. For this reason, the pillion step holder 110 can be easily attached and detached.

  As described above, according to this embodiment, since the pillion step holder 110 is provided on the pivot bearing 13 having high rigidity, the pillion step holder 110 protrudes from the pivot bearing 13 in the vehicle width direction. For this reason, when the vehicle body of the motorcycle 1 is inclined at a predetermined angle, the pillion step holder 110 protects the vehicle body, so that the influence of external force on the vehicle body can be reduced. Further, since the pillion step holder 110 also serves as a protective member for protecting the vehicle body, it is not necessary to provide a dedicated protective member, so that the influence of external force on the vehicle body is reduced with a simple configuration without increasing the number of parts. be able to.

  In addition, according to the present embodiment, the pillion step 120 is foldably attached to the pillion step holder 110. Therefore, when there is no passenger, the pillion step 120 is folded to protrude in the vehicle width direction. The amount can be reduced, and the motorcycle can be made compact.

  Further, according to the present embodiment, since the pillion step holder 110 is provided coaxially with the pivot shaft 25 supported by the pivot bearing 13, the end of the pivot shaft 25 is covered by the pillion step holder 110. The aesthetic appearance of the pivot bearing 13 can be improved. Further, since the pillion step holder 110 also serves as a cover member that covers the pivot shaft 25, it is not necessary to provide a dedicated cover member for the pivot bearing 13, and the number of parts can be reduced.

  Further, according to the present embodiment, the vehicle drive motor 52 and the fuel cell 51 that supplies electric power to the vehicle drive motor 52 are provided, and the fuel cell 51 is a highly rigid portion in the vehicle body frame 2. The fuel cell 51 is protected by the pivot bearings 13 and 13 and the pillion step holder 110 provided in the vicinity of the pivot bearings 13 and 13 because they are arranged inside and near the left and right pivot bearings 13 and 13. For this reason, when the vehicle body of the motorcycle 1 is inclined at a predetermined angle, the influence of external force on the fuel cell 51 can be reduced.

As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this, A various design deformation | transformation can be performed. For example, in the present embodiment, the configuration in which the pillion step holder 110 is provided in the pivot bearing 13 as an example of the pivot portion has been described, but a motorcycle including a pivot plate instead of the pivot bearing may be used. In this case, the pillion step holder may be provided at any position on the pivot plate.
In the present embodiment, the inner flange 13C for attaching the pillion step holder 110 is provided inside the cylindrical portion 13A of the pivot bearing 13. However, the present invention is not limited to this, and the outer flange is provided outside the cylindrical portion 13A. May be provided.
In the present embodiment, the fuel cell motorcycle has been described as an example of the motorcycle. However, the present invention is not limited to this, and the present invention may be applied to a vehicle in which an engine is mounted on a vehicle body frame and the engine is driven. Of course it is good.

1 is a left side view of a motorcycle according to an embodiment. 1 is a rear view of a motorcycle. It is a block diagram for demonstrating the whole outline | summary of a fuel power generation engine. It is a perspective view which shows the fuel cell mounted in the vehicle body frame. It is a perspective view which shows the pillion step part attached to the pivot bearing. It is a side view which shows a pivot bearing.

Explanation of symbols

1 Motorcycle 2 Body frame 8 Power unit (swing arm)
11 Upper frame 12 Lower frame 12A Bent part 13 Pivot bearing (pivot part)
13A Cylindrical portion 13B Bearing portion 13C Inner flange 13D Screw hole 14 Seat support frame 16 Subframe 20A Driver seat 20B Passenger seat 21 Pivot cross frame 25 Pivot shaft 50 Fuel power generation engine 51 Fuel cell 52 Motor for vehicle drive 100 Pillion step portion 110 Pillion step holder 120 Pillion step 111 Groove portion 112 Side surface 113 Slope portion 114 Back surface 121 Recess portion 130 Shaft portion

Claims (4)

A vehicle body frame, a pair of left and right pivots attached to the vehicle body frame, a swing arm that is swingably supported by the vehicle body frame via the pivot parts and to which drive wheels are attached, and an upper part of the vehicle body frame A supported driver seat, a passenger seat connected to the driver seat, a pillion step that serves as a footrest for the passenger when seated on the passenger seat, and a pillion step holder to which the pillion step is attached In a pillion step mounting structure of a motorcycle comprising:
The pillion step mounting structure for a motorcycle, wherein the pillion step holder is provided in the vicinity of the pivot portion.   The pillion step mounting structure for a motorcycle according to claim 1, wherein the pillion step is foldably attached to the pillion step holder.   The pillion step mounting structure for a motorcycle according to claim 1 or 2, wherein the pillion step holder is provided coaxially with a pivot shaft supported by the pivot portion.   A vehicle drive motor for driving the drive wheels and a fuel cell for supplying electric power to the vehicle drive motor, wherein the fuel cell is disposed inside and in the vicinity of the left and right pivot portions. Item 4. A pillion step mounting structure for a motorcycle according to any one of Items 1 to 3.

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