JP2008247311A - Motorcycle with fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motorcycle with a fuel cell capable of restraining increase of a vehicle width while sufficiently securing supporting rigidity of a fuel cylinder. <P>SOLUTION: In this motorcycle 1 with a fuel cell, a power generating engine 50 driving a motor 52 for driving a vehicle using a power generated by a fuel cell 51 as a power source is arranged in a vehicle body frame 2, and a fuel cylinder 22 supplying fuel to the fuel cell 51 is arranged above a rear wheel of the vehicle body frame 2 and below a seat. A protector 35 covering a side of the fuel cylinder 22 from the rear part of the seat 20 is exposed and supported so that it can be seen from the outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fuel cell motorcycle equipped with a fuel cylinder at the rear of a vehicle body.

From the viewpoint of environmental protection and securing energy resources to replace fossil fuels, fuel cells have attracted attention, and fuel cell motorcycles using a motor driven by electric energy generated in the fuel cells as a drive source have been developed. . The fuel cell motorcycle is equipped with a fuel cylinder that supplies fuel gas to the fuel cell, and a vehicle in which one fuel cylinder is restrained and held by a restraining band at the front and rear center of the vehicle body (see Patent Document 1), A vehicle (see Patent Document 2) in which one fuel cylinder is held above the rear wheel has been proposed.
JP 2005-28987 A JP 2006-312404 A

  In vehicles with conventional fuel cylinders arranged in the center of the front and rear of the vehicle body, the fuel cylinders exist in the center of the vehicle body. May be difficult. On the other hand, in a vehicle in which the fuel cylinder is disposed above the rear wheel, each component constituting the power generation engine can be efficiently disposed in the center of the vehicle body, and the capacity of the fuel cylinder is easily secured.

  However, in the conventional vehicle in which the fuel cylinder is arranged above the rear wheel, the rear frame is formed to project outward in the vehicle body width direction in order to arrange a large fuel cylinder while ensuring a clearance with the rear wheel. Since the fuel cylinder is supported on the raised portion, the vehicle width is increased. In some cases, the rear frame is further increased in size to increase the vehicle width in order to ensure the rigidity of the rear frame that supports the fuel cylinder.

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a fuel cell motorcycle capable of suppressing an increase in vehicle width while sufficiently securing the support rigidity of a fuel cylinder.

In order to solve the above-mentioned problems, the present invention provides a vehicle body frame in which a power generation engine that drives a vehicle drive motor using electric power generated in a fuel cell as a power source is disposed, and a fuel cylinder that supplies fuel to the fuel cell is disposed in the vehicle body. In the fuel cell motorcycle disposed above the rear wheel of the frame and below the seat, a protector that covers the side of the fuel cylinder by turning the seat from behind is exposed and supported.
According to the present invention, the protector that covers the side of the fuel cylinder by turning the seat from behind is exposed and supported so that the fuel cylinder can be covered with the protector. The overhang to the vehicle can be suppressed and the increase in the vehicle width can be suppressed. Also, the protector can be used as a rear cover that covers the rear part of the vehicle body, and the number of parts can be reduced as compared with the case where a rear cover is provided separately.

  In this case, a restraint band that restrains the fuel cylinder is provided, the restraint band is divided into an outer band outside the vehicle body and an inner band inside the vehicle body, the outer band is fixed to the body frame, and the inner band Is preferably movably connected to the outer band. According to this structure, the outer side of a restraint band can be functioned as a protective member of a fuel cylinder.

  In this case, it is preferable that the fuel cylinders are arranged in a pair on the left and right sides of the vehicle body frame, and the binding bands for binding the pair of left and right fuel cylinders are arranged in a staggered manner by shifting the front and rear of the vehicle body. According to this configuration, the left and right restraint bands can be arranged close to each other, and the fuel cylinder can be brought closer to the inside of the vehicle body to further suppress an increase in the vehicle width.

  In this case, the fuel cylinder is supported on a pair of left and right rear frames of the vehicle body frame, and the pair of left and right rear frames are disposed below the fuel cylinder and on the side of the vehicle cylinder outside the vehicle body. It is preferable to extend inward. According to this structure, while protecting a fuel cylinder with a protector, the width | variety between rear frames can be narrowed and the increase in a vehicle width can be suppressed more.

In the present invention, since the protector that covers the side of the fuel cylinder by turning around the seat from behind is exposed and supported so as to be visible, an increase in the vehicle width can be suppressed while sufficiently securing the support rigidity of the fuel cylinder. .
The restraint band that restrains the fuel cylinder is divided into an outer band outside the vehicle body and an inner band inside the vehicle body, the outer band is fixed to the body frame, and the inner band is movably connected to the outer band. The outside of the band can function as a protective member for the fuel cylinder.
In addition, a pair of left and right fuel cylinders are arranged on the body frame, and the binding bands that bind the pair of left and right fuel cylinders are shifted in the front and rear of the vehicle body in a staggered manner, so that the left and right restraining bands can be arranged close to each other. By increasing the fuel cylinder closer to the inside of the vehicle body, the increase in the vehicle width can be further suppressed.
In addition, the fuel cylinder is supported on the pair of left and right rear frames of the vehicle body frame, and the pair of left and right rear frames are extended below the fuel cylinder to the inside of the vehicle body from the side edge outside the vehicle body of the fuel cylinder. While protecting the fuel cylinder with the protector, the width between the rear frames can be narrowed to further suppress the increase in the vehicle width.

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 are for the vehicle body.
FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention, FIG. 2 is a front view of the motorcycle, and FIG. 3 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. The steering handle 6, the front wheel 7 rotatably supported by the front fork 5, the power unit 8 supported swingably up and down on the rear part of the body frame 2, and the rear end of the power unit 8 are rotated. A rear wheel 9 that is freely supported, a rear cushion 10 disposed between the power unit 8 and the vehicle body frame 2, and a seat 20 that is supported substantially at the upper center of the vehicle body frame 2 are provided.

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 portions 13 and 13.
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 frame 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. .

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. A pair of pivot portions 13 and 13 are connected.
A pair of left and right rear frames (rear frames) 17 and 17 extending rearward of the vehicle body are connected to the sub frames 16 and 16. Restraint bands 18 and 18 are fixed to the rear frames 17 and 17, respectively, and the two fuel cylinders 22 and 22 are restrained and held by the restraint bands 18 and 18 side by side (see FIG. 3). A cylinder holding unit 30 is configured. Furthermore, guard pipes 19 and 19 that function as guard members for guarding the sides of the fuel cylinders 22 and 22 are attached to the rear frames 17 and 17.

  A pivot shaft 25 extending horizontally in the vehicle width direction is supported on the pair of left and right pivot portions 13, 13, and the power unit 8 is connected to the vehicle body frame 2 through the pivot shaft 25 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 vehicle body frame 2 is entirely formed into a cradle type, that is, a saddle type by the above-described frames, and a fuel power generation engine (power) including the fuel cell 51 is enclosed in a space (device arrangement area) surrounded by the saddle type vehicle body frame 2. Generating 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 power generated by the fuel power generation engine (power generation engine) 50 is adjusted. A voltage regulator (VCU) 75 and a battery 80 as a secondary battery for storing the electric power are arranged. A pair of left and right radiators 90, 90 are disposed 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 the front of the driver's feet placed on a pair of left and right step floors 26 and 26 (see FIGS. 2 and 3). Leg cover 40 </ b> B, a center cover 40 </ b> C covering the center of the vehicle body frame 2, and an under cover 40 </ b> D covering the lower part of the vehicle body frame 2.

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 by an electrochemical reaction and water is generated.
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 adjustment 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, the relatively heavy parts, that is, the fuel cell 51, the voltage regulator 75, the humidifier 62, the supercharger 60, and the voltage regulator 75 that constitute a part of the fuel power generation engine 50, In the direction, since they are arranged in a substantially central region of the body frame 2, 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 and the like can be shortened. it can.
As shown in FIG. 3, an ion exchanger 67 is disposed on the front side of the voltage regulator 75, and the ion exchanger 67 performs an ion exchange process on the water generated by the fuel cell 51.

In addition, an air cleaner 59, which is a relatively lightweight part that constitutes a part of the fuel power generation engine 50, is disposed substantially in the front portion of the head pipe 3 and is disposed in the front cover 40A of the vehicle body cover 40 as shown in FIG. It will fit. For this reason, the capacity of the air cleaner 59 can be increased in the space within the front cover 40A, 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. 3) are connected.
As shown in FIG. 3, a rear exhaust pipe 65B extends from the rear of the silencer 66. The rear exhaust pipe 65B is bent toward the center of the vehicle body width direction at the rear of the vehicle body, and its outlet 65C is slightly behind the vehicle body. Provided facing downward. 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. 2, the front cover 40A is provided with a plurality of headlights 42 and 42 (round two-lamp type in this example) so as to surround the air cleaner 59, and as shown in FIG. A taillight 45 and a rear fender 46 are disposed at the rear of the vehicle body.

As shown in FIGS. 1 and 2, the pair of left and right radiators 90, 90 have a bilaterally symmetric 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 a posture inclined inward in the width direction 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 3, reference numeral 92 denotes a reservoir tank of the radiators 90, 90, and the reservoir 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.

  Next, the cylinder holding unit 30 will be described. FIG. 5 (A) shows a top view of the cylinder holder 30 and FIG. 5 (B) shows a side view thereof. 6 and 7 are perspective views showing a state in which the fuel cylinders 22 and 22 are removed. As shown in FIGS. 5 (A) and 5 (B), the cylinder holding unit 30 includes restraint bands 18 and 18 supported by rear frames (rear frames) 17 and 17, and left and right restraints restrained by the restraint bands 18 and 18. And a protector 35 that covers the pair of fuel cylinders 22 and 22. As shown in FIGS. 5A and 6, the restraining bands 18, 18 are arranged in a zigzag pattern shifted in the front-rear direction of the vehicle body on the left and right sides, and each is formed in a symmetrical shape. For this reason, one restraint band 18 is explained in full detail below.

The restraining band 18 includes an outer band 18A bent in a substantially semicircular arc shape on the outer side of the vehicle body and a pair of front and rear inner bands 18B bent in a substantially semicircular arc shape on the inner side of the vehicle body, and each band 18A, 18B has rigidity. It is made of a material such as a light metal (aluminum, tungsten, magnesium, etc.) or a reinforced resin such as glass fiber or FRP.
The outer band 18A is formed in a wide shape that is longer in the longitudinal direction of the vehicle body than the inner band 18B. In this embodiment, as shown in FIG. 5B, the front and rear length LA of the cylinder portion of the fuel cylinder 22 is substantially reduced. It is formed in a length LB corresponding to half. Further, as shown in FIG. 6, a plate-like foot portion 18A1 extending downward along the arc of the band 18A is integrally provided at the front portion of the outer band 18A, and the plate-like foot portion 18A1 is The front bracket 17 </ b> A provided inside the rear frame 17 is connected.

Here, as shown in FIGS. 6 and 7, the pair of left and right rear frames 17, 17 are first frames 17 </ b> B, 17 </ b> B that extend so as to gradually narrow the width between the rear frames 17, 17 as they go rearward of the vehicle body. And second frames 17C and 17C which are bent from the rear ends of the first frames 17B and 17B and extend so as to gradually widen between the rear frames 17 and 17, Cross pipes 17D and 17E are disposed and reinforced between the rear portions and between the rear portions of the second frames 17C and 17C.
The front bracket 17A is joined to the inside of the portion of the first frame 17B that is reinforced by the cross pipe 17D, whereby the outer band 18A can be supported at a location where the strength of the rear frame 17 is strong.

The outer band 18A bends in an arc shape along the foot 18A1 connected to the front bracket 17A and protrudes to the outer side of the first frame 17B, then bends toward the inner side of the vehicle, and is formed at the upper edge of the upper end. A plurality of holes (hooking portions) 18A2 and 18A2 are formed at intervals in the front-rear direction.
The base end portions of the pair of front and rear inner bands 18B and 18B are hooked to the hole portions (hook portions) 18A2 and 18A2, and the inner bands 18B and 18B are movably connected. The outer band 18A is formed with a plurality (three in this example) of opening holes V, V, and V, and the opening band V ensures lightness while sufficiently securing the rigidity of the outer band 18A. .

  As shown in FIGS. 6 and 7, the inner bands 18B and 18B have the same shape, and the tips of the inner bands 18B and 18B are bent outward, and bolt insertion portions 18B1 and 18B1 are formed at the bent portions. A bolt 36 is inserted into the bolt insertion portion 18B1 of the front inner band 18B from the inside of the vehicle body with a coil spring 37 functioning as an elastic member interposed therebetween. The bolt 36 is connected to the front bracket 17A of the outer band 18A. And through the front bracket 17A of the rear frame 17 and fastened by a nut (not shown).

Similarly, a bolt 36 is inserted into the bolt insertion portion 18B1 of the rear inner band 18B from the inside of the vehicle body with a coil spring 37 functioning as an elastic member interposed between the rear frame 17 and the rear frame 17. The rear frame 17F provided inside the second frame 17C is passed through and fastened with a nut (not shown).
Since the bolt 36 is inserted through the coil spring 37 in this way, when the bolt 36 is tightened to some extent, the inner band 18B is urged to the closed side by the elastic force of the coil spring 37 and the bolt 36 is prevented from loosening. can do. Further, rubber mats 18B2 and 18B2 functioning as elastic members are attached to the inner bands 18B and 18B, respectively, on the inner peripheral side thereof.

  With the configuration described above, the bolt 36 is removed and the inner bands 18B and 18B are opened with respect to the outer band 18A. After the fuel cylinder 22 is loaded, the inner bands 18B and 18B are closed and the bolts 36 are fastened. The cylinder 22 can be restrained. In this case, the fuel cylinder 22 can be reliably restrained by the elastic force of the coil spring 37. Further, the rubber mats 18B2 and 18B2 sandwiched between the fuel cylinder 22 and the inner bands 18B and 18B can eliminate the gap between the fuel cylinder 22 and the inner band 18B, thereby restraining the fuel cylinder 22 more reliably. Thus, the support rigidity of the fuel cylinder 22 can be sufficiently ensured.

  Further, since the outer band 18A is formed in a wide shape covering substantially half of the fuel cylinder 22, the fuel cylinder 22 can be restrained with a wide area, and the fuel cylinder 22 can be restrained reliably, The outer band 18A can also function as a protective cover for protecting the fuel cylinder 22.

  Further, in this configuration, as shown in FIG. 5A, a rubber member 38 that functions as an impact absorbing member is also held in the gap between the fuel cylinders 22. For this reason, even if a force that causes relative movement between the fuel cylinder 22 and the inner bands 18B and 18B or a force that causes relative movement between the left and right fuel cylinders 22 occurs due to vehicle body vibration or the like during vehicle travel, the movement Energy (inertial energy) can be relaxed and absorbed by the coil spring 37, the rubber mats 18B2, 18B2, and the rubber member 38 described above.

As shown in FIGS. 1 and 5A, the protector 35 has a shape that covers the pair of left and right fuel cylinders 22 and 22 around the seat 20 from the rear, and is a rigid material such as a light metal (aluminum). , Tungsten, magnesium, etc.) or a glass fiber, FRP or other reinforced resin.
More specifically, the protector 35 extends from the left and right sides of the seat 20 so as to be continuous with the pair of left and right tip portions 35A and 35A extending forward of the vehicle body and to the fuel cylinder 22 after extending to the left and right of the seat 20. , 22 and a side cover portion 35B covering from the upper side to the side, and a rear cover portion 35C covering the rear side of the fuel cylinders 22 and 22 continuously to the side cover portion 35B.
The protector 35 has a pair of left and right tip portions 35A and 35A fixed to the frame connecting members 15 and 15 (see FIG. 1) of the vehicle body frame 2 via bolts (not shown), and the rear cover portion 35C. The left and right ends are connected to the rear frames 17 and 17 (second frames 17C and 17C) via bolts 34 and 34 (see FIG. 7). In this case, the protector 35 also functions as a reinforcing frame that is connected to the rear frames 17 and 17 at the front and rear to reinforce the rear frames 17 and 17.

Further, as shown in FIG. 7, plate members 19A, 19A are joined to the guard pipes 19, 19 provided in the rear frames 17, 17 on the inner side of the tips, and this plate member 19A is connected to the protector 35. It extends to the inside of the side cover portion 35B and is fixed to the side cover portion 35B by bolts 39. Accordingly, the rear frames 17 and 17 and the protector 35 are connected via the rear frame 17 and the plate member 19A, and the rear frames 17 and 17 can be further reinforced, and the support rigidity of the guard pipes 19 and 19 can be increased. Can also be increased.
Here, FIG. 8 shows an XX cross section of FIG. As shown in this figure, a bolt 39 inserted through the outer band 18A from the inside is fastened to the side cover portion 35B of the protector 35. Thus, the outer band 18A is integrated with the protector 35, and the movement of the outer band 18A due to vehicle body vibration or the like can be restricted by the protector 35.
In addition, a lamp unit is built in the upper portion of the rear cover portion 35C of the protector 35 and the taillight 45 is configured to be constant, and a rear fender 46 is integrally formed extending below the vehicle body. Thus, since the taillight 45 and the rear fender 46 are integrally formed on the protector 35, the number of parts can be reduced as compared with the case where they are formed separately.

As described above, the motorcycle 1 of the present embodiment is provided with the protector 35 that covers the side of the fuel cylinders 22 and 22 by turning the seat 20 from the rear, and the protector 35 is exposed so as to be externally visible. 2 is supported by the rear frames (rear frames) 17 and 17, so that the fuel cylinders 22 and 22 can be covered by the protector 35, and the rear frames 17 and 17 can be prevented from projecting outward in the vehicle width direction. Further, the protector 35 can improve the frame rigidity of the rear frames 17 and 17.
For this reason, in this configuration, the rear frames 17, 17 are extended below the fuel cylinders 22, 22 to the inside of the vehicle cylinder outer side edge of the fuel cylinders 22, 22, thereby protecting the fuel cylinders 22, 22. On the other hand, the width between the rear frames 17 and 17 can be narrowed, the increase in the vehicle width can be suppressed, and the design freedom of the rear frame 17 (the vehicle body frame 2) can be improved.
Further, since the protector 35 is exposed so as to be visible, the protector 35 can be used as a rear cover that covers the rear portion of the vehicle body, and the number of parts can be reduced as compared with the case where a rear cover is separately provided, and the weight can be reduced accordingly. You can also plan.

Further, in this configuration, the restraining bands 18, 18 that restrain the fuel cylinders 22, 22 are divided into an outer band 18A and an inner band 18B, the outer band 18A is fixed to the rear frame 17, and the inner band 18B is fixed to the outer band. Since it is movably connected to 18A, the outer band 18A can function as a protective member for protecting the outside of the fuel cylinders 22 and 22, and the fuel cylinders 22 and 22 can be more reliably protected. Further, since the inner band 18B is movable, the fuel cylinder 22 can be easily attached and detached.
Further, in this configuration, the rear frames 17 and 17 are provided with a pair of left and right guard pipes 19 and 19 that function as guard members for guarding the sides of the fuel cylinders 22 and 22, so that the fuel cylinders 22 and 22 can be More sufficient protection is possible.

Further, in this configuration, since the fuel cylinders 22 and 22 are arranged in a pair on the left and right, each of the fuel cylinders 22 and 22 is reduced in size while ensuring a sufficient capacity as compared with a case where the fuel cylinder is used as one. can do. For this reason, even if the fuel cylinders 22 and 22 are arranged above the rear wheel 9, the fuel cylinders 22 and 22 are arranged close to each other on the inner side of the vehicle body while ensuring a sufficient clearance from the rear wheel 9. Can do.
Moreover, since the restraining bands 18 and 18 for restraining the fuel cylinders 22 and 22 are arranged in a zigzag manner by shifting the front and rear of the vehicle body, the left and right restraining bands 18 and 18 can be disposed closer to each other. The vehicle width can be narrowed by bringing 22 closer to the inside of the vehicle body.

  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 above-described embodiment, the case where the present invention is applied to the fuel cylinder support structure of a scooter type fuel cell motorcycle has been described. However, the present invention is not limited to this and is widely applied to fuel cell motorcycles other than the scooter type. It is possible.

1 is a left side view of a motorcycle according to an embodiment. 1 is a front view of a motorcycle. 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. (A) is a top view of a cylinder holding part, (B) is the side view. It is a perspective view which shows the cylinder holding part of the state which removed the fuel cylinder. It is a perspective view which cuts a part of protector and shows the cylinder holding part of the state which removed the fuel cylinder. It is a figure which shows the XX cross section of FIG.

Explanation of symbols

1 Motorcycle 2 Body frame 8 Power unit 17 Rear frame (rear frame)
17A Front bracket 17B First frame 17C Second frame 17D, 17E Cross pipe 17F Rear bracket 18 Restraint band 18A Outer band 18B Inner band 18B1 Bolt insertion part 18B2 Rubber mat (elastic member)
20 seat 22 fuel cylinder 30 cylinder holding part 35 protector 35A front end part 35B side cover part 35C rear cover part 37 coil spring (elastic member)
38 Rubber member (Shock absorbing member)
50 Fuel power generation engine (power generation engine)
51 Fuel Cell 52 Motor (Vehicle Drive Motor)
55 Hydrogen gas supply unit 58 Air supply unit 61 Surplus gas circulation unit 70 Electronic control unit 75 Voltage regulator 80, 81, 82 Battery 90 Radiator

Claims (4)

A power generation engine that drives a vehicle drive motor using electric power generated by the fuel cell as a power source is disposed on the body frame, and a fuel cylinder that supplies fuel to the fuel cell is disposed above the rear wheel of the body frame and below the seat. In fuel cell motorcycles,
A fuel cell motorcycle, wherein a protector that covers the side of the fuel cylinder by turning around the seat from behind is exposed and supported so as to be visible.   A restraint band for restraining the fuel cylinder is provided, the restraint band is divided into an outer band outside the vehicle body and an inner band inside the vehicle body, the outer band is fixed to the body frame, and the inner band is fixed to the outer band. The fuel cell motorcycle according to claim 1, wherein the fuel cell motorcycle is movably connected to the vehicle.   3. The fuel cylinder according to claim 2, wherein the fuel cylinders are arranged in a pair on the left and right sides of the vehicle body frame, and the binding bands for binding the pair of left and right fuel cylinders are arranged in a zigzag pattern so as to be shifted forward and backward of the vehicle body. Fuel cell motorcycle.   The fuel cylinder is supported on a pair of left and right rear frames of the vehicle body frame, and the pair of left and right rear frames extends below the fuel cylinder and on the inside of the vehicle body from the side edge outside the vehicle body of the fuel cylinder. The fuel cell motorcycle according to any one of claims 1 to 3, wherein the fuel cell motorcycle is used.

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