JP2017128202A - Work vehicle - Google Patents

Abstract

Provided is an environment-friendly work vehicle equipped with hydrogen-related equipment such as a fuel cell easily and safely. A dust collecting device 40 provided on a chassis 20, an electric motor for driving the dust collecting device 40, and a fuel cell unit 50 for generating electric power for driving the electric motor are provided. The fuel cell unit 50 includes a fuel cell 502, a hydrogen tank 504, a hydrogen supply pipe that connects the hydrogen tank 504 and the fuel cell 502, and a storage case that stores therein the fuel cell 502, the hydrogen tank 504, and the hydrogen supply pipe. 501. [Selection] Figure 1

Description

  The present invention relates to a work vehicle including a work device provided on a chassis and an electric motor that drives the work device.

2. Description of the Related Art Conventionally, a work vehicle including a vehicle engine, a work device provided on a chassis, and an electric motor that drives the work device, the work device includes a hydraulic actuator and a hydraulic pump that supplies hydraulic oil to the hydraulic actuator. It is known that the power source for driving the hydraulic pump can be switched to a vehicle engine or an electric motor (for example, see Patent Document 1).
The work vehicle of Patent Document 1 is a hybrid work vehicle in which both a vehicle engine and an electric motor can be used as a travel drive source. When the wheels are driven to travel by the vehicle engine, the electric motor is caused by the idle rotation of the motor shaft. Since an electromotive force can be generated, the electromotive force can be charged in a power storage device mounted on the vehicle. The electric power stored in the power storage device is used not only for driving assistance but also when the hydraulic pump of the working device is driven by the electric motor while the vehicle is stopped and the vehicle engine is also stopped.
Driving the hydraulic pump of the working device with an electric motor is environmentally friendly because it reduces noise and does not generate exhaust gas compared to driving the hydraulic pump with a vehicle engine.

However, in a conventional work vehicle such as Patent Document 1, it is necessary to drive a vehicle engine in order to store power in a power storage device during traveling, and noise and exhaust gas are generated during power storage. There was room for improvement in terms of a friendly work vehicle.
On the other hand, in the passenger car industry, in recent years, development of a fuel cell-equipped vehicle including a traveling electric motor, a fuel cell, and a power storage device has been progressing (see, for example, Patent Document 2).
In this fuel cell-equipped vehicle, the fuel cells are collectively arranged in a lower region of one of the front seat and the rear seat, and the power storage device is disposed in the other lower region. In a fuel cell-equipped vehicle such as Patent Document 2, the traveling electric motor is driven based on the electric power generated by the fuel cell, so that no exhaust gas is generated during traveling. Further, the electric power generated by the fuel cell during traveling can be stored in the power storage device, and no exhaust gas is generated during power storage in the power storage device. As a result, it can be said that the fuel cell-equipped vehicle is an environment-friendly vehicle, so that it is conceivable to apply the fuel cell to the work vehicle.

JP 2014-122096 A JP 2007-186200 A

  However, work vehicles, unlike passenger cars, have a small space for passengers to ride on, but a large space for mounting work equipment. Therefore, in order to safely place hydrogen-related equipment such as fuel cells and hydrogen tanks, it is completely different from passenger cars Different arrangements are required. For example, in general, work vehicles are manufactured by the chassis manufacturer while the traveling part is manufactured by the body manufacturer, and both parts are assembled into a finished product. It must be easy for manufacturers to place. In addition, since the work equipment is used to load, move, and lower the load, the load may come in contact with each part of the work equipment, but at that time, the hydrogen-related equipment will not be damaged. It is necessary to do so.

  Therefore, an object of the present invention is to provide a work vehicle that is more environmentally friendly by easily and safely mounting a hydrogen-related device such as a fuel cell.

  In order to achieve the above object, a first invention includes a chassis, a driver's cab provided on the chassis, a working device provided on the chassis, an electric motor that drives the working device, and the electric motor. A fuel cell unit that generates electric power for driving the motor, the fuel cell unit generating a fuel cell by supplying hydrogen and air, a hydrogen tank storing hydrogen to be supplied to the fuel cell, and A hydrogen supply pipe that connects the hydrogen tank and the fuel cell; and a storage case that houses the fuel cell, the hydrogen tank, and the hydrogen supply pipe.

According to the first aspect, since the electric power of the electric motor that drives the work device is generated by the fuel cell, the vehicle engine is not required for power generation unlike the conventional work vehicle. That is, during power generation, noise is reduced and no exhaust gas is generated as compared with the vehicle engine, so that an environment-friendly work vehicle can be obtained.
In addition, since the fuel cell unit stores the fuel cell, the hydrogen tank, and the hydrogen supply pipe connecting them together in the storage case, even if hydrogen leaks from the fuel cell, the hydrogen tank, or the hydrogen supply pipe. The destination of hydrogen leaking into the storage case can be limited. This makes it easy to detect any hydrogen-related device that leaks in the storage case. In addition, the time and location of the hydrogen released to the outside of the storage case can be easily adjusted, resulting in excellent safety. In addition, since the destination of hydrogen leaking into the storage case is limited, it is possible to minimize the influence of hydrogen leakage on other devices.
In addition, since hydrogen-related devices such as fuel cells that are difficult to handle are collected in a storage case, there are fewer pipes and wires to go out from the fuel cell unit. Thereby, compared with the case where a fuel cell and a hydrogen tank are provided in various places of a chassis, the manufacturing man-hour which a chassis maker and a body builder attach a fuel cell unit to a chassis can be reduced.
In addition, since hydrogen-related devices such as fuel cells are stored together in the storage case, the load does not come into contact with the hydrogen-related devices when using the work equipment, causing damage to the hydrogen-related devices. I can not.

In the second invention, in the first invention,
The fuel cell unit is provided on the chassis behind the cab and in the center in the vehicle front-rear direction.

  According to the second invention, since the fuel cell unit can be located near the center of gravity of the vehicle, the weight balance between the front, rear, left, right, and top and bottom can be greatly shifted even if a work device similar to the conventional one is provided on the chassis. Absent. Thereby, it is not necessary to manufacture a working device having a special structure for weight balance, and the work vehicle can be easily manufactured.

  According to a third aspect, in the first or second aspect of the invention, the power storage device includes a power storage device that stores power using the power generated by the fuel cell and supplies power to the electric motor. It is arranged outside.

According to the third aspect, the electric power generated by the fuel cell during traveling can be stored in the power storage device, and no exhaust gas is generated when power is stored in the power storage device. Thereby, it can be set as an environment-friendly work vehicle.
In addition, since the power storage device is arranged outside the storage case of the fuel cell unit, even if a trouble occurs in the fuel cell unit such as hydrogen leaking in the storage case, the effect is prevented from reaching the power storage device. Can do. As a result, it is possible to secure more time that can be driven by the electric motor of the working device.

  According to a fourth invention, in any one of the first to third inventions, a wall for the storage case is provided with a filling port for filling the hydrogen tank with hydrogen, the filling port and the hydrogen tank. A hydrogen filling pipe connecting the two is housed inside the housing case.

  According to the fourth invention, since the hydrogen filling pipe that connects the filling port and the hydrogen tank is not exposed to the outside of the storage case, even if the working device loads, moves, or lowers the load, the load Does not contact the hydrogen filled tube. Thereby, damage to the hydrogen-filled pipe can be prevented, and the safety is excellent. In addition, even if hydrogen leaks from a part of the hydrogen filling tube, it is possible to prevent the influence on other devices, so that the safety is excellent.

  In a fifth invention, in any one of the first to fourth inventions, a hydrogen detection sensor is provided on a wall surface of the storage case.

  According to the fifth aspect, when hydrogen leaks in the storage case, it can be detected at an early stage. As a result, it is possible to take measures such as stopping the container main valve of the hydrogen tank before a large amount of hydrogen leaks, which is excellent in safety.

In a sixth invention, in any one of the first to fifth inventions, the fuel cell is disposed at the bottom of the storage case, and the hydrogen tank is disposed above the fuel cell. The ceiling wall of the storage case is provided with a vent portion for escaping hydrogen leaking inside the storage case to the outside of the storage case.

  According to the sixth aspect of the invention, in the storage case, the fuel cell unit is disposed at the bottom and the hydrogen tank is disposed above the unit, so that the air and hydrogen warmed by the heat generated by the fuel cell can be naturally removed. It can be easily moved upward by convection. Thereby, even if hydrogen leaks in the storage case, the hydrogen can be quickly moved toward the ceiling wall of the storage case. And by providing the vent part in the ceiling wall, the hydrogen leaking in the storage case is smoothly discharged to the outside. In addition, by providing the vent portion on the ceiling wall, the traveling wind easily passes near the vent portion while the work vehicle is traveling. Thereby, when hydrogen leaks during traveling, the hydrogen discharged to the outside from the vent portion can be quickly diffused, which is excellent in safety.

  In a seventh invention, in any one of the first to sixth inventions, the electric motor is disposed below the cab, and includes a drive source for the working device and a drive source for vehicle travel. I also use it.

  According to the seventh aspect, the electric power generated by the fuel cell can be used not only for driving the working device but also for traveling. Thereby, exhaust gas is not always emitted and it can be set as an environment-friendly work vehicle. Further, since the electric motor is disposed below the cab, the space of the vehicle engine of the conventional work vehicle can be used effectively.

As described above, according to the present invention, exhaust gas is not generated during power generation by the fuel cell, so that it can be an environment-friendly work vehicle.
Moreover, since the fuel cell unit stores the fuel cell, the hydrogen tank, and the hydrogen supply pipe connecting them together in the storage case, the destination of the hydrogen leaking into the storage case can be limited, Since the time and location of the hydrogen released to the outside of the storage case can be easily adjusted, the safety is excellent.
In addition, hydrogen-related devices such as fuel cells that are difficult to handle are gathered in a storage case, so there are fewer pipes and wires going out from the fuel cell unit, and fewer manufacturing steps are required to attach the fuel cell unit to the chassis. That's it.

It is a side view of a refuse collection vehicle as a work vehicle concerning one embodiment of the present invention. It is a schematic explanatory drawing which shows the power transmission system of the refuse collection vehicle of this embodiment. It is a partially broken perspective view of a fuel cell unit. It is a piping diagram of a fuel cell unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a side view of a refuse collection vehicle 1 as a work vehicle according to an embodiment of the present invention, and FIG. 2 shows a schematic explanatory diagram showing an example of a power transmission system of the dust collection vehicle 1. As shown in FIGS. 1 and 2, the garbage collection vehicle 1 of the present embodiment includes a chassis 20, a cab 30 provided in the front part of the chassis 20, and a dust as a working device provided in the chassis 20. A collection device 40, an electric motor 205 that drives the dust collection device 40, and a fuel cell unit 50 are provided.

The chassis 20 has a pair of left and right chassis frames 201 extending in the front-rear direction.
The dust collecting device 40 is a dust box as a pair of left and right subframes 412 attached to the upper surface of the chassis frame 201 and a packing box which is provided on the subframe 412 and is rotatable up and down around the rear end portion of the subframe 412. A storage box 401, a dust input box 402 continuously connected to the rear opening 401 a of the dust storage box 401 so as to freely rotate up and down, and a dust loading mechanism 403 provided inside the dust input box 402 are provided. .

The dust loading mechanism 403 is for compressing the dust (loaded material) input through the dust input port 402 a of the dust input box 402 and loading it in the dust container 401. The dust loading mechanism 403 includes a rotating plate 403a and a pushing plate 403b. The rotating plate 403a is driven by a hydraulic motor 403d via a speed reduction mechanism 403c. The pushing plate 403b is driven by a pushing cylinder 403e.
When discharging the dust loaded in the dust container box 401, the dust container box 402 is turned upward by the dump cylinder 404 after the dust input box 402 is turned upward by a lifting cylinder (not shown). It has become.
The hydraulic motor 403d, the pushing cylinder 403e, the dump cylinder 404, and the elevating cylinder are driven when hydraulic oil in the hydraulic oil tank 406 (see FIG. 1) is supplied by the hydraulic pump 405 via the control valve 409.

The hydraulic pump 405 is connected to the electric motor 205 via a PTO shaft 209, a PTO 208 (power take-off device), and a transmission 207.
The electric motor 205 is disposed below the cab 30 and serves as both a drive source for the dust collecting device 40 and a drive source for traveling the vehicle.
The electric motor 205 can apply a driving force to the wheels 211 via the transmission 207 and the torque shaft 210.

As shown in FIGS. 1 to 3, the fuel cell unit 50, which is a characteristic part of the present invention, generates electric power for driving the electric motor 205, and is located behind the cab 30 and in the vehicle longitudinal center. 20 is provided. More specifically, the fuel cell unit 50 is provided on a subframe 412 between the cab 30 and the dust container box 401.
The fuel cell unit 50 includes a storage case 501, a fuel cell 502 that is disposed inside the storage case 501 and generates power by supplying hydrogen and air, and a blower 503 as an air supply unit that supplies air to the fuel cell 502. And a hydrogen tank 504 that is disposed inside the storage case 501 and stores hydrogen supplied to the fuel cell 502.
The fuel cell 502 is disposed at the bottom of the storage case 501, and the hydrogen tank 504 is disposed above the fuel cell 502.

More specifically, the storage case 501 has a rectangular parallelepiped shape having six wall surfaces, and a frame frame 509 for maintaining strength is provided inside. The frame frame 509 is positioned at the bottom and is a pair of front and rear lower frames 509a, is positioned above the lower frame 509a and is positioned above the pair of front and rear first middle frames 509b and the first middle frame 509b. A pair of second middle frames 509c.
The fuel cell 502 is located at the center in the vehicle width direction inside the storage case 501 and is placed on a support member 526 that is installed on the front and rear lower frames 509a. At a position adjacent to the fuel cell 502 in the vehicle width direction, a DCDC converter 506 is disposed on one side, and a blower 503 is disposed on the other side.

The DCDC converter 506 boosts the electric power generated by the fuel cell 502 so as to be suitable for the driving voltage of the electric motor 205.
The blower 503 introduces air into the storage case 501 through an air introduction pipe 524 from a vehicle air cleaner (not shown) provided outside the storage case 501. In addition, the blower 503 supplies oxygen in the air to the fuel cell 502 through the air supply pipe 522 to promote the reaction with hydrogen. Further, the blower 503 has an effect of promoting convection of the gas present in the storage case 501.

In the present embodiment, two hydrogen tanks 504 are provided, and are disposed inside the storage case 501 so that the longitudinal direction thereof faces the vehicle width direction. More specifically, one of the hydrogen tanks 504 is placed on a support member 526 installed on the front and rear first middle frame 509b and fixed with a belt member 525. The remaining one is placed on a support member 526 installed on the front and rear second middle frame 509c and fixed by a belt member 525.
The hydrogen tank 504 is connected to the fuel cell 502 through a hydrogen supply pipe 521.

A hydrogen supply pipe 521 that connects the hydrogen tank 504 and the fuel cell 502 is housed in a storage case 501, and the hydrogen supply pipe 521 has a container base valve in the order closer to the hydrogen tank 504 as shown in FIG. 511, a high pressure side pressure sensor 512, a high pressure side filter 513, a regulator 514, a low pressure side pressure sensor 515, a relief valve 516, a manual release valve 517, a low pressure side stop valve 518, a low pressure side filter 520, and a flow meter 519. Yes.
Since the fuel cell 502, the hydrogen tank 504, and the hydrogen supply pipe 521 connecting them are stored together in the storage case 501, even if hydrogen leaks from the fuel cell 502, the hydrogen tank 504, or the hydrogen supply pipe 521. It can be retained in the storage case 501.

  The container original valve 511 is an electromagnetic valve and is provided corresponding to each of the two hydrogen tanks 504. When an abnormality occurs in one or both of the hydrogen tanks 504, the hydrogen tank 504 is closed and the supply of hydrogen is stopped. The container original valve 511 is also closed when the hydrogen tank 504 is filled with hydrogen from the outside.

  The regulator 514 adjusts the hydrogen tank 504 at a high pressure of 70 MPa to a low pressure suitable for supplying the fuel cell 502 with hydrogen. To determine whether the pressure is appropriately adjusted before and after the fuel cell 502, the detection results of the high-pressure side pressure sensor 512 and the low-pressure side pressure sensor 515 are used.

  The relief valve 516 causes the hydrogen supply pipe 521 to break down from the inside by allowing hydrogen to escape into the internal space of the storage case 501 and lowering the pipe pressure when trouble occurs and the pressure in the hydrogen supply pipe 521 increases abnormally. To prevent it.

The manual release valve 517 is for allowing the operator to manually adjust the amount of hydrogen supplied to the fuel cell 502 in an emergency. The operation part 517a of the manual release valve 517 is exposed on the side wall 501a of the storage case 501 (see FIG. 1), and the operator can operate the manual release valve 517 from the outside of the storage case 501 by this operation part 517a. ing. When the manual release valve 517 is opened, hydrogen is allowed to escape to the internal space of the storage case 501.
The low-pressure side stop valve 518 is provided to adjust the power generation by the fuel cell 502 by arbitrarily supplying and stopping hydrogen to the fuel cell 502.

A filling port 505 for filling the hydrogen tank 504 with hydrogen is provided on the wall surface of the side wall 501a on one side in the vehicle width direction of the storage case 501. The filling port 505 is connected to the hydrogen supply pipe 521 through a hydrogen filling pipe 523 inside the storage case 501. The connection locations are two locations corresponding to each hydrogen tank 504, and are closer to the hydrogen tank 504 than the container base valve 511 provided on the hydrogen supply pipe 521. The hydrogen filling pipe 523 is provided with a check valve 510 to prevent hydrogen from leaking from the filling port 505. All the hydrogen filling pipes 523 connecting the filling port 505 and the hydrogen tank 504 are accommodated in the storage case 501.

As shown in FIGS. 3 and 4, a hydrogen detection sensor 507 is provided on the central wall surface in the vehicle width direction of the ceiling wall 501 b of the storage case 501. The hydrogen detection sensor 507 detects the hydrogen leak at the earliest possible stage when hydrogen leaks from the fuel cell 502, the hydrogen tank 504, the hydrogen supply pipe 521, etc., and the container base valve 511 or the low pressure side stop valve 518. It is provided to open and close.

Further, at both ends in the vehicle width direction of the ceiling wall 501 b of the storage case 501, vent portions 508 that allow hydrogen leaking inside the storage case 501 to escape to the outside of the storage case 501 are provided.
The storage case 501 is hermetically sealed except for the vent portion 508, but hydrogen leaking in the storage case 501 is smoothly discharged to the outside. Further, by providing the vent portion 508 on the ceiling wall 501b, traveling wind easily passes through the vicinity of the vent portion 508 while the work vehicle is traveling. Thereby, when hydrogen leaks during traveling, the hydrogen discharged to the outside from the vent portion is quickly diffused.

Next, in the present embodiment, as shown in FIG. 1 and FIG. 2, a power storage device 203 that stores power using the power generated by the fuel cell 502 and supplies power to the electric motor 205 is provided. The power storage device 203 is made of a lithium ion battery and is disposed outside the fuel cell unit 50. More specifically, the power storage device 203 is supported by a bracket (not shown) provided on the side surface of the subframe 412 so as to be positioned directly below the fuel cell unit 50 in a side view of the garbage truck 1. Since the fuel cell unit 50 and the power storage device 203 are combined near the center of gravity of the vehicle, the weight balance is good.

In the power storage device 203, the power generated by the fuel cell 502 is boosted and stored by a DCDC converter 506 (see FIG. 3).
The power storage device 203 is electrically connected to an inverter 204 attached to the electric motor 205, and the inverter 204 is electrically connected to the electric motor 205. Thereby, the electric power stored in the power storage device 203 is supplied to the electric motor 205 via the inverter 204, and the electric motor 205 is driven.

Control of the inverter 204 and the fuel cell unit 50 is performed by the chassis side control device 206. The chassis-side control device 206 is housed in a box and installed at the rear of the cab 30.
As shown in FIGS. 2 and 4, the chassis side control device 206 receives pressure and flow rate from the high pressure side pressure sensor 512, low pressure side pressure sensor 515, flow meter 519, hydrogen detection sensor 507, etc. provided in the fuel cell unit 50. And information such as hydrogen leaks are received, and the container source valve 511, the low pressure side stop valve 518, and the like are controlled.
Further, the chassis control device 206 transmits and receives control signals to and from the work device control device 410.

The work device side control device 410 controls the operation of the dust collecting device 40 and sends a control signal to the control valve 409.
The power source of the work device side control device 410 is an auxiliary battery 411 attached to the chassis frame 201 via a bracket. The auxiliary battery 411 also serves as a power source for an air conditioner and various lamps (not shown), but the working device side control device 410 itself is supplied with electric power from the fuel cell unit 50.
Further, the work device side control device 410 is configured to receive operation signals from a front operation panel 407 provided in the cab 30 and a rear operation panel 408 provided in the dust bin box 402.

The front operation panel 407 is provided with a power selector switch (not shown), and by operating this power selector switch, it is selected whether the garbage truck 1 is driven or the dust collector 40 is driven. The When the garbage collection vehicle 1 is driven, the PTO 208 is in a disconnected state, and when the electric motor 205 is driven by the electric power of the power storage device 203, the driving force is transmitted to the wheels 211 via the transmission 207 and the torque shaft 210. The On the other hand, when driving the dust collecting device 40, the PTO 208 is in a joined state and the power transmission from the transmission 207 to the torque shaft 210 is in a disconnected state. Thereby, when the electric motor 205 is driven by the electric power of the power storage device 203, the driving force is transmitted to the hydraulic pump 405 via the transmission 207 and the PTO shaft 209.

The front operation panel 407 and the rear operation panel 408 are provided with operation switches for the dust loading mechanism 403. When the operator operates this operation switch, the dust loading mechanism 403 is operated to load the dust.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.
In the said embodiment, although the garbage collection vehicle 1 was illustrated as a work vehicle, this invention is not restricted to this, It can apply to other work vehicles, such as a desorption vehicle, an aerial work vehicle, and a vehicle transport vehicle.
In the above embodiment, the electric power generated by the fuel cell 502 of the fuel cell unit 50 is used for both running and driving of the dust collecting device 40. However, the present invention is not limited to this, and the fuel of the fuel cell unit is used. The electric power generated by the battery may be used only for driving the work device.
In the above embodiment, the electric motor 205 is disposed below the cab 30 and serves as both the drive source for the dust collecting device 40 and the drive source for traveling the vehicle. Not limited to this, separate electric motors may be provided for traveling and for driving the working device.

Moreover, in the said embodiment, although the filling port 505 was provided in the wall surface of the side wall 501a of the vehicle width direction one side of the storage case 501, this invention is not limited to this, A filling port is provided in the bottom side of a storage case, a front side, You may provide in the wall surface of the rear surface side.
Moreover, in the said embodiment, although the hydrogen detection sensor 507 was provided in the ceiling wall 501b of the storage case 501, this invention is not restricted to this, You may provide a hydrogen detection sensor in the side surface of a storage case.

  As described above, the present invention provides fuel for garbage collection vehicles and other work vehicles including a cab provided on a chassis, a work device provided on the chassis, and an electric motor that drives the work device. This is useful when a battery is installed.

1 Garbage truck (work vehicle)
20 chassis 203 power storage device 30 cab
40 Waste collection device (working device)
401 Dust storage box 402 Dust input box 50 Fuel cell unit 501 Storage case 501b Ceiling wall 502 Fuel cell 504 Hydrogen tank 505 Filling port 507 Hydrogen detection sensor 508 Vent unit 521 Hydrogen supply pipe 523 Hydrogen filling pipe

Claims (7)

A chassis, a driver's cab provided on the chassis, a working device provided on the chassis, an electric motor that drives the working device, and a fuel cell unit that generates electric power for driving the electric motor; With
The fuel cell unit includes a fuel cell that generates power by supplying hydrogen and air, a hydrogen tank that stores hydrogen to be supplied to the fuel cell, a hydrogen supply pipe that connects the hydrogen tank and the fuel cell, and the fuel cell. And a storage case for storing the hydrogen tank and the hydrogen supply pipe inside,
A work vehicle comprising:   2. The work vehicle according to claim 1, wherein the fuel cell unit is provided on the chassis at a rear portion of the driver's cab and in a vehicle front-rear direction center. A power storage device that is stored with power generated by the fuel cell and supplies power to the electric motor;
The work vehicle according to claim 1, wherein the power storage device is disposed outside the storage case. The wall surface of the storage case is provided with a filling port for filling the hydrogen tank with hydrogen, and a hydrogen filling pipe connecting the filling port and the hydrogen tank is stored in the storage case. Item 4. The work vehicle according to any one of Items 1 to 3.   The work vehicle according to claim 1, wherein a hydrogen detection sensor is provided on a wall surface of the storage case. The fuel cell is disposed at the bottom of the storage case, and the hydrogen tank is disposed above the fuel cell,
The work vehicle according to any one of claims 1 to 5, wherein a vent portion is provided on a ceiling wall of the storage case to allow hydrogen leaking inside the storage case to escape to the outside of the storage case. The work vehicle according to any one of claims 1 to 6, wherein the electric motor is disposed below the cab and serves both as a drive source for the work device and a drive source for traveling the vehicle. .

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