Work vehicle

Abstract

To provide a work vehicle which enables a pipe connected to a tank to be connected to a connection device without performing laborious work.SOLUTION: The invention comprises: a tank that stores gas; a pipe that is connected to the tank; a connection device that includes a gas filling port and is connectable to the pipe; and a support structure that adjustably supports a position of the connection device in a state in which the pipe is not connected to the connection device.SELECTED DRAWING: Figure 18

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with a fuel cell. [Background technology]

[0002] Conventionally, some work vehicles, such as tractors, are equipped with a fuel cell mounted on the vehicle body and an electric motor driven by electricity generated by the fuel cell (see, for example, Patent Document 1). This type of work vehicle is equipped with a tank that stores gas to be supplied to the fuel cell, a pipe connected to the tank, and a connection device that is connected to the pipe. The connection device can supply (refill) gas from an external source supplied to a gas fill port into the tank via the pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-13186 Summary of the Invention [Problem to be solved by the invention]

[0004] Since the gas is stored in a tank under high pressure, the piping connected to the tank must be rigid and highly pressure-resistant. Therefore, when the piping is routed along a predetermined path, the position of the end of the piping connected to the connection device cannot be easily changed. Therefore, when the connection device is installed in a work vehicle during manufacturing or maintenance, if the end of the routed piping and the piping connection portion of the connection device are misaligned, the work of connecting (aligning) the connection device and the piping becomes complicated.

[0005] Therefore, the present invention provides a work vehicle that can connect a pipe connected to a tank to a connection device without performing complicated work. [Means for solving the problem]

[0006] The work vehicle of the present invention comprises a tank for storing gas, a pipe connected to the tank, a connection device that includes a gas filling port and can be connected to the pipe, and a support structure that supports the connection device in an adjustable position when the pipe is not connected to the connection device. [Effects of the Invention]

[0007] The present invention makes it possible to connect a pipe connected to a tank to a connecting device without performing complicated work. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an overall perspective view of a work vehicle according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the work vehicle according to the embodiment. [Figure 3] FIG. 3 is a rear view of the work vehicle according to the embodiment. [Figure 4] FIG. 4 is a side view (right side view) of the work vehicle according to the embodiment. [Figure 5] FIG. 5 is another side (left side) view of the work vehicle according to the embodiment. [Figure 6] FIG. 6 is an exploded perspective view of the work vehicle according to the embodiment. [Figure 7] FIG. 7 is a plan view including the vehicle body of the work vehicle according to the embodiment and its peripheral equipment. [Figure 8] FIG. 8 is a schematic block diagram of the electrical system of the work vehicle according to the embodiment. [Figure 9] FIG. 9 is an exploded perspective view showing a part of the work vehicle according to the same embodiment. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is an exploded perspective view of a portion of the work vehicle according to the same embodiment. [Figure 12] FIG. 12 is a side view (right side view) of the work vehicle according to the embodiment with the hood removed. [Figure 13]FIG. 13 is another side (left side) view of the work vehicle according to the embodiment with the hood removed. [Figure 14] FIG. 14 is a perspective view of the tank of the work vehicle according to the same embodiment. [Figure 15] FIG. 15 is an explanatory diagram relating to the arrangement of piping connecting the connection device and the tank of the work vehicle according to the embodiment, and is a partially enlarged side view focusing on the frame. [Figure 16] FIG. 16 is an exploded perspective view of the connection device and support structure of the work vehicle according to the same embodiment. [Figure 17] FIG. 17 is a perspective view including a partial cross section of the connection device and support structure of the work vehicle according to the same embodiment. [Figure 18] FIG. 18 is a perspective view of the connection device and support structure of the work vehicle according to the same embodiment, as viewed from the rear side. [Figure 19] 19 is a partial perspective view of the vicinity of the pressure reducing unit of the work vehicle according to the same embodiment, and is an enlarged perspective view of part XIX in FIG. 13. FIG. [Figure 20] FIG. 20 is a schematic diagram of a pressure reducing section of the work vehicle according to the same embodiment. [Figure 21] FIG. 21 is a perspective view of a frame that supports the tank of the work vehicle according to the same embodiment. [Figure 22] FIG. 22 is a perspective view of the work vehicle according to the same embodiment with the first hood open. [Figure 23] FIG. 23 is a perspective view of the work vehicle according to the embodiment, with the frame and body disassembled and the parts (members) that make up the second bonnet disassembled. [Figure 24] FIG. 24 is a perspective view of the periphery of the second bonnet of the work vehicle according to the embodiment, seen from diagonally above left with the parts (members) that make up the second bonnet disassembled. [Figure 25] FIG. 25 is a perspective view of the periphery of the second bonnet of the work vehicle according to the embodiment, seen from diagonally above right with the parts (members) that make up the second bonnet disassembled. [Figure 26]FIG. 26 is a perspective view of the fuel cell and support frame of the work vehicle according to the same embodiment, as viewed from diagonally above left. [Figure 27] FIG. 27 is a perspective view of the fuel cell and support frame of the work vehicle according to the same embodiment, as viewed from diagonally above right. [Figure 28] 28 is a schematic cross-sectional view for explaining the arrangement of the bonnet, fuel cell, and support frame of the work vehicle according to the embodiment, and is a cross-sectional view taken along the line XXVIII-XXVIII of FIG. 5. FIG. [Figure 29] FIG. 29 is a partially enlarged schematic view for explaining the arrangement of the bonnet and support frame of the work vehicle according to this embodiment, focusing on the area around the bonnet. [Figure 30] FIG. 30 is a rear view of a work vehicle according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A work vehicle according to one embodiment of the present invention will be described below with reference to the drawings. In the following description, the straight-ahead direction (forward / reverse direction) of the work vehicle and the direction perpendicular to the up-down direction (vehicle width direction) will be referred to as the first direction, and the straight-ahead direction of the work vehicle 1 (forward / reverse direction: front-to-rear direction) will be referred to as the second direction. In addition, in the second direction, the forward side of the work vehicle will be referred to as the front, and the backward side of the work vehicle will be referred to as the rear. In line with these definitions, the up-down direction will be referred to as the third direction.

[0010] As shown in Figures 1 to 5, the work vehicle 1 of this embodiment is a tractor to which a work implement according to the purpose or application of agricultural work is coupled. The work vehicle 1 is equipped with a vehicle body 2 that can travel. Specifically, the work vehicle 1 is equipped with the vehicle body 2 and a traveling device 3 that supports the vehicle body 2 so that it can travel. The work vehicle 1 is equipped with a steering device 4 that steers the traveling device 3.

[0011] The work vehicle 1 of this embodiment is equipped with a driver's seat DS in which a worker sits. In this embodiment, the work vehicle 1 is equipped with a protection mechanism 5 that protects the driver's seat DS (the worker seated in it). The work vehicle 1 is equipped with a step 56 for the worker to get in and out of the driver's seat DS.

[0012] 6 and 7, the work vehicle 1 is provided with a prime mover M that drives the traveling device 3. Accordingly, the work vehicle 1 is provided with a drive transmission device 21 that transmits the drive of the prime mover M to the traveling device 3.

[0013] 6, the work vehicle 1 is equipped with a power generation system 6 that generates electricity using gas. That is, the work vehicle 1 is equipped with a power generation system 6 that includes a fuel cell 60.

[0014] Specifically, the work vehicle 1 is equipped with a fuel cell 60. The work vehicle 1 is equipped with an exhaust pipe 61 that discharges exhaust wastewater generated in conjunction with power generation by the fuel cell 60 to the outside (see FIG. 4). The work vehicle 1 is equipped with a tank 62 that stores gas, piping 63 connected to the tank 62 (hereinafter referred to as the filling piping 63), a connection device 64 that includes a gas filling port 640 and is connectable to the filling piping 63, and a support structure 65 that supports the connection device 64 so that the position of the connection device 64 can be adjusted when the filling piping 63 is not connected to the connection device 64. The work vehicle 1 is also equipped with a pressure reducing unit 66 that reduces the pressure inside the tank 62. That is, the work vehicle 1 is equipped with a gas exhaust valve 660 that discharges gas from the tank 62. The work vehicle 1 is equipped with a supply piping 67 that connects the tank 62 and the fuel cell 60 and supplies gas from the tank 62 to the fuel cell 60.

[0015] That is, the power generation system 6 of the work vehicle 1 includes a fuel cell 60 that generates power by reacting gas with oxygen in the air, a discharge pipe 61 that discharges water and air that are generated as the fuel cell 60 generates power, a tank 62 that stores gas to be supplied to the fuel cell 60, and a connection device 64 for filling the tank 62 with gas. The power generation system 6 of this embodiment also includes a pressure reducing section 66 (gas discharge valve 660) that reduces the pressure inside the tank 62. The power generation system 6 also includes a supply pipe 67 that connects the tank 62 and the fuel cell 60 and supplies gas from the tank 62 to the fuel cell 60.

[0016] Accordingly, the work vehicle 1 is provided with a cover 85B that covers at least a portion of the gas exhaust valve 660. The work vehicle 1 is provided with a frame 7 that supports the tank 62. The work vehicle 1 is provided with an electricity storage device 68 (see FIG. 4) that stores electricity generated by the fuel cell 60. The work vehicle 1 of this embodiment is provided with a hood 8 that faces the fuel cell 60, and a support frame 9 that connects the fuel cell 60 and the hood 8 and supports the hood 8.

[0017] 7, the vehicle body 2 includes a front frame 20 disposed on the front side in the second direction, and a drive transmission device 21 connected to the front frame 20. Specifically, the vehicle body 2 has a body frame 22 extending in the second direction. The body frame 22 is made up of the front frame 20 as a structural body, and casings 210a, 211a, and 212a that house various mechanisms of the drive transmission device 21.

[0018] The front frame 20 includes a bottom frame 200 that is rectangular in plan view and elongated in the second direction, a pair of vertical ribs 201, 201 that are arranged on the bottom frame 200 with a gap in the first direction and that are connected to the bottom frame 200, and a connecting frame 202 that connects the drive transmission device 21 (a clutch device 210, described later) and that is connected to rear ends of the pair of vertical ribs 201, 201 in the second direction. The connecting frame 202 is provided with a through hole that penetrates in the second direction.

[0019] In this embodiment, the drive transmission device 21 includes a clutch device 210 , a transmission device 211 connected to the clutch device 210 , and a differential device 212 connected to the transmission device 211 .

[0020] The clutch device 210 has a primary rotating shaft that receives (inputs) power (rotation), a secondary rotating shaft, a clutch mechanism that can be switched between a state in which the rotation of the primary rotating shaft is transmitted to the secondary rotating shaft and a state in which the transmission of the rotation of the primary rotating shaft to the secondary rotating shaft is released (disconnected), and a clutch case 210a that houses the clutch mechanism. The clutch device 210 is disposed rearward in the second direction relative to the front frame 20. In this state, the clutch case 210a is connected (bolted) to the connecting frame 202.

[0021] The transmission device 211 has an input rotation shaft connected to the secondary rotation shaft of the clutch device 210, an output rotation shaft, a gear group that transmits the rotation input to the input rotation shaft to the output rotation shaft, and a transmission case 211a that houses the gear group. The transmission device 211 is disposed rearward of the clutch device 210 in the second direction. In this state, the transmission case 211a is connected (bolted) to the clutch case 210a.

[0022] The differential device 212 includes an input shaft that is connected to the output rotation shaft of the transmission device 211 and extends in the second direction, a pair of output shafts that extend on one side and the other side in the first direction, a bevel gear that transmits rotation of the input shaft to the output shaft, and a distribution case 212a that houses the bevel gear and supports the pair of output shafts on both sides of the bevel gear. The differential device 212 is disposed rearward in the second direction relative to the transmission device 211. Each of the pair of output shafts of the differential device 212 protrudes from the distribution case 212a to one side and the other side in the first direction. In this state, the distribution case 212a is connected (bolted) to the transmission case 211a.

[0023] As a result, in the vehicle body 2 of this embodiment, the front frame 20, the clutch device 210, the transmission device 211, and the differential device 212 are connected in this order from the front side to the rear side in the second direction. In other words, the front frame 20, the clutch case 210a of the clutch device 210, the transmission case 211a of the transmission device 211, and the distribution case 212a of the differential device 212 are integrally configured to form the vehicle body frame 22.

[0024] The work vehicle 1 of this embodiment is a tractor that performs agricultural work, and a working implement is coupled to the rear end in the second direction of the vehicle body 2. That is, the work vehicle 1 is equipped with a coupling device 25 that couples the working implement to the rear end of the vehicle body 2 (body frame 22). In this embodiment, the coupling device 25 is a three-point linkage mechanism that raises and lowers the working implement, and is coupled to a distribution case 212a that is located at the rearmost end of the vehicle body 2 (body frame 22).

[0025] The vehicle body 2 directly or indirectly supports the tank 62. In the work vehicle 1 of this embodiment, the vehicle body 2 indirectly supports the tank 62 via the frame 7. Accordingly, the vehicle body 2 has frame support portions 23a, 23b, and 23c that support the frame 7. In this embodiment, the vehicle body 2 supports the frame 7 at multiple locations. Accordingly, the vehicle body 2 has multiple frame support portions 23a, 23b, and 23c.

[0026] Each of the plurality of frame support portions 23a, 23b, 23c is disposed on the outside in the first direction with respect to the body frame 22. Each of the plurality of frame support portions 23a, 23b, 23c is fixed (fastened) with bolts to the frame 7 on which it is placed (supported).

[0027] More specifically, each of the plurality of frame supports 23a, 23b, 23c is located outward from both side surfaces of the body frame 22 (body 2) facing the first direction, and supports the frame 7 located above from below. In this embodiment, the plurality of frame supports 23a, 23b, 23c are arranged at intervals in the second direction on one side surface of the body frame 22 (body 2) facing one side in the first direction, and the plurality of frame supports 23a, 23b, 23c are arranged at intervals in the second direction on the other side surface of the body frame 22 (body 2) facing the other side in the first direction.

[0028] The multiple frame support parts 23a, 23b, 23c on one side of the body frame 22 (body 2) and the multiple frame support parts 23a, 23b, 23c on the other side of the body frame 22 (body 2) are arranged symmetrically with respect to the center line CL extending in the second direction of the body 2 (body frame 22).

[0029] In this embodiment, three frame supports 23a, 23b, and 23c are provided on each of one side surface and the other side surface of the body frame 22 (body 2). The three frame supports 23a, 23b, and 23c are arranged at the front, rear, and intermediate portions in the second direction. Of the three frame supports 23a, 23b, and 23c provided on each of the one side surface and the other side surface of the body frame 22 (body 2), the frontmost frame support 23a will be referred to as the first frame support 23a, the intermediate frame support 23b will be referred to as the second frame support 23b, and the intermediate frame support 23c will be referred to as the third frame support 23c.

[0030] In this embodiment, the first frame support portion 23a is located forward of front wheels 30FR, 30FL (described later) in the second direction, the second frame support portion 23b is located between the front wheels 30FR, 30FL and rear wheels 30RR, 30RL, and the third frame support portion 23c is located rearward of a rotation shaft (output shaft of a differential device 212) of the rear wheels 30RR, 30RL (described later) in the second direction. Note that in this embodiment, the second frame support portion 23b is located rearward of the front wheels 30FR, 30FL and in front of the protection mechanism 5 (windshield 50) (see FIGS. 4 and 5).

[0031] In the work vehicle 1 of this embodiment, a tilt angle sensor S1 that detects tilting of the work vehicle 1 is attached to the tip end (tip end in the first direction) of each of the pair of first frame support parts 23a, 23a. In addition, a tilt angle sensor S1 that detects tilting of the work vehicle 1 is also attached near the base end (root) of each of the pair of second frame support parts 23b, 23b.

[0032] In addition, as shown in Figures 4 and 5, in the work vehicle 1 of this embodiment, an acceleration sensor S2 is arranged behind the protection mechanism 5 and above the vehicle body 2 (in this embodiment, inside a storage case 75 described later that is supported by the frame 7).

[0033] The tilt angle sensor S1 and the acceleration sensor S2 are connected to the control device 10, as shown in Fig. 8. That is, the work vehicle 1 is equipped with the control device 10 that makes predetermined decisions based on the detection results of the various sensors S1, S2 and switches (for example, the detection switch 646 described below). The control device 10 is equipped with an arithmetic and control unit 100, a memory unit 101 that stores information used for processing by the arithmetic and control unit 100, an input unit 102 that is electrically connected to the arithmetic and control unit 100 and inputs electrical signals as input information from external electrical equipment to the arithmetic and control unit 100, and an output unit 103 that is electrically connected to the arithmetic and control unit 100 and outputs instruction signals (electrical signals) as output information from the arithmetic and control unit 100 to the external electrical equipment.

[0034] The arithmetic and control unit 100 is a CPU (MPU) and includes an arithmetic unit 100a and a control unit 100b. In the control device 10 according to this embodiment, the storage unit 101 includes a first storage unit 101a that temporarily or short-term stores information used in processing by the arithmetic and control unit 100 (the arithmetic unit 100a and the control unit 100b), and a second storage unit 101b that long-term stores information used in processing by the arithmetic and control unit 100 (the arithmetic unit 100a and the control unit 100b). The first storage unit 101a is a so-called memory, and the second storage unit 101b is a storage device such as a hard disk or SSD (Solid State Drive).

[0035] The input unit 102 and the output unit 103 are so-called interfaces. An electrical device that outputs an electrical signal as information is connected to the input unit 102. On the other hand, an electrical device that inputs an electrical signal as information is connected to the output unit 103.

[0036] In this embodiment, as described above, in addition to the tilt angle sensor S1 and acceleration sensor S2, the input unit 102 is connected to the detection switch 646, a temperature sensor TS1 that detects the temperature of the fluid flowing through the first radiator HE1 (described later), a temperature sensor TS2 that detects the temperature of the fluid flowing through the second radiator HE2, and a temperature sensor TS3 for the oil cooler OC. On the other hand, the output unit 103 is connected to an alarm device 11 (for example, a monitor or an alarm) that outputs the detection result as is, an on-off valve V1, a blower for the first radiator HE1, a blower for the second radiator HE2, a blower for the oil cooler OC, etc.

[0037] This allows the control device 10 to perform overall control of the work vehicle 1. In this embodiment, the control device 10 determines whether the work vehicle 1 has rolled over or is at risk of rolling over based on the detection results of the inclination angle sensor S1, and determines whether a collision (impact) has occurred while traveling or during work based on the detection results of the acceleration sensor S2. Furthermore, the control device 10 of the work vehicle 1 in this embodiment determines whether the connection nozzle is connected to the connection device 64 based on the detection results of the detection switch 646, and controls the switching between opening and closing of the flow path of the on-off valve V1, which will be described later.

[0038] 1 to 6, in this embodiment, the traveling device 3 is a wheel-type (tire-type) traveling device 3. The traveling device 3 is provided with a pair of wheels 30FR, 30FL, 30RR, 30RL arranged at an interval in a first direction or a second direction, the pair of wheels 30FR, 30FL, 30RR, 30RL being rotatable around an axis extending in the first direction. That is, the work vehicle 1 (traveling device 3) includes, as the pair of wheels 30FR, 30FL, 30RR, 30RL arranged at an interval in the first direction, a first wheel 30FR and a rear wheel 30RR arranged on one side in the first direction (the width direction of the vehicle body 2), and a second wheel 30FL and a rear wheel 30RL arranged on the other side in the width direction of the vehicle body 2. The work vehicle 1 also includes front wheels 30FR, 30FL and rear wheels 30RR, 30RL that support the vehicle body 2 so that it can travel. That is, the work vehicle 1 (traveling device 3) includes a pair of wheels 30FR, 30FL, 30RR, 30RL arranged at a distance in the second direction, namely, front wheels 30FR, 30FL arranged at the front side of the vehicle body 2 and rear wheels 30RR, 30RL arranged at the rear side of the vehicle body 2.

[0039] In this embodiment, the traveling device 3 includes a pair of front wheels 30FR, 30FL that support the front side of the vehicle body 2 in the second direction, and a pair of rear wheels 30RR, 30RL that support the rear side of the vehicle body 2 in the second direction.

[0040] The pair of front wheels 30FR, 30FL are disposed on both sides of the vehicle body 2 in the first direction, and the pair of rear wheels 30RR, 30RL are disposed on both sides of the vehicle body 2 in the first direction. In other words, the vehicle body 2 (body frame 22) extending in the second direction is located between the pair of front wheels 30FR, 30FL and between the pair of rear wheels 30RR, 30RL.

[0041] Therefore, of the pair of front wheels 30FR, 30FL, the front wheel 30FR on one side in the first direction (width direction of the vehicle body 2) is the first wheel 30FR, and of the pair of front wheels 30FR, 30FL, the front wheel 30FL on the other side in the first direction (width direction of the vehicle body 2) is the second wheel 30FL. Also, of the pair of rear wheels 30RR, 30RL, the rear wheel 30RR on one side in the first direction (width direction of the vehicle body 2) is the first wheel 30RR, and of the pair of rear wheels 30RR, 30RL, the rear wheel 30RL on the other side in the first direction (width direction of the vehicle body 2) is the second wheel 30RL.

[0042] The rear wheel 30RR, which is the first wheel 30RR, is attached to one output shaft of the differential device 212, and the rear wheel 30RR, which is the second wheel 30RL, is attached to the other output shaft of the differential device 212. As a result, in the traveling device 3 of this embodiment, the pair of rear wheels 30RR, 30RL are driven by the driving force of the prime mover M.

[0043] In this embodiment, the pair of front wheels 30FR, 30FL are steered wheels that are steered by operating a handle (steering wheel) located in the driver's cab DR, which will be described later. That is, the pair of front wheels 30FR, 30FL are attached to the steering device 4 and are located on both sides of the vehicle body 2 in the first direction. Note that in this embodiment, the transmission device 211 has a drive shaft that extends forward (toward the steering device 4), and also drives the pair of front wheels 30FR, 30FL via the drive shaft. This makes the work vehicle 1 of this embodiment a four-wheel drive.

[0044] As shown in Fig. 7, in this embodiment, the prime mover M is an electric motor having an output shaft. The prime mover M is supported by the vehicle body 2. Specifically, the prime mover M is disposed on the front frame 20 with the output shaft facing rearward. In this embodiment, the prime mover M is disposed between a pair of longitudinal ribs 201, 201 of the front frame 20, and is fixed to the connecting frame 202. The output shaft of the prime mover M is inserted into a through-hole in the connecting frame 202.

[0045] As a result, the output shaft of the prime mover M is connected to the primary rotation shaft of the clutch device 210 connected (fixed) to the connecting frame 202. In this embodiment, the prime mover M has an output shaft that projects forward in addition to an output shaft that projects rearward (an output shaft that is connected to the clutch device 210), and a hydraulic pump P that discharges hydraulic oil to operate the connecting device 25 is connected to the output shaft that projects forward. In other words, the prime mover M also drives the hydraulic pump P.

[0046] As shown in FIGS. 2 and 7 , the steering device 4 is fixed to the front frame 20. Specifically, the steering device 4 includes a pair of steering knuckles 40, 40 that support the front wheels 30FR, 30FL rotatably about axes extending in a direction perpendicular to the third direction, the pair of steering knuckles 40, 40 each rotatable about an axis extending in the third direction, a steering mechanism that is linked to an operation (rotation operation) of a steering wheel disposed in the driver's seat DS and rotates the pair of steering knuckles 40, 40 in conjunction with the operation of the steering wheel, and a steering case 41 that houses the steering mechanism and supports the steering knuckles 40, 40. In this embodiment, the steering mechanism is a hydraulic mechanism. The steering case 41 is connected to the lower surface of the front frame 20, and the pair of steering knuckles 40, 40 are disposed on both sides of the vehicle body 2 (front frame 20) in the first direction. Accordingly, the pair of front wheels 30FR, 30FL are also disposed on both sides of the vehicle body 2 (front frame 20) in the first direction.

[0047] 1 to 6, the driver's seat DS is supported by the vehicle body 2. In this embodiment, the driver's seat DS is disposed above the transmission device 211 (transmission case 211a) that constitutes the vehicle body 2 (body frame 22). In other words, the driver's seat DS is fixed to the vehicle body frame 22 (transmission case 211a).

[0048] As shown in Figures 1, 2, and 4 to 6, the work vehicle 1 (protection mechanism 5) includes a windshield 50 located in front of the driver's seat DS. The protection mechanism 5 of this embodiment is a cabin 5 that covers the entire driver's seat DS and defines a driver's compartment DR where the worker (driver) stays. Because the protection mechanism 5 of this embodiment is a cabin 5 that covers the entire driver's seat DS, it has a windshield 50 at the front and, as shown in Figure 3, a rear window 51 at the rear.

[0049] 9, the protection mechanism 5 includes a roof 52 disposed above the driver's seat DS and support pillars 53a, 53a, 53b, 53b that support the roof 52. The protection mechanism 5 of this embodiment includes, as the support pillars 53a, 53a, 53b, 53b, a pair of front support pillars 53a, 53a disposed on the front side in the second direction and a pair of rear support pillars 53b, 53b disposed on the rear side in the second direction. The pair of front support pillars 53a, 53a are disposed at an interval in the first direction, and the pair of rear support pillars 53b, 53b are disposed at an interval in the first direction.

[0050] A windshield 50 is disposed between the pair of front support pillars 53a, 53a, and a rear glass 51 is disposed between the pair of rear support pillars 53b, 53b. An openable / closable door 54 is disposed between one front support pillar 53a on one side in the first direction and one rear support pillar 53b on one side in the first direction. In this embodiment, an openable / closable door 54 is also disposed between the other front support pillars 53a, 53a, 53b, 53b on the other side in the first direction and the other rear support pillar 53b, 53b on the other side in the first direction. In this way, the protection mechanism 5 surrounds the driver's seat DS and defines a driver's cab DR where the operator stays.

[0051] The protection mechanism 5 having the above-described configuration is disposed in a rear half region in the second direction of the vehicle body 2. That is, the protection mechanism 5 is disposed above the clutch device 210, the transmission device 211, and the differential device 212.

[0052] The step 56 is arranged below the door 54 (entrance / exit) of the protection mechanism 5. In this embodiment, the protection mechanism 5 has doors 54 on both sides in the first direction, so the step 56 is arranged below both sides of the protection mechanism 5 in the first direction. In this embodiment, the protection mechanism 5 is arranged above the vehicle body 2 (body frame 22), so the step 56 is arranged on both sides of the vehicle body 2 (body frame 22) in the first direction, as shown in FIGS. 4 and 5. The step 56 is also arranged in two tiers, one above the other, on each of one side and the other side in the first direction. That is, two steps 56 are arranged at an interval in the third direction on each of one side and the other side in the first direction.

[0053] The fuel cell 60 generates electricity by reacting supplied gas with oxygen in the air. The fuel cell 60 of this embodiment is supplied with hydrogen as gas. The fuel cell 60 generates air and water during power generation (reaction between the gas and oxygen). Accordingly, the fuel cell 60 has an outlet 600 for discharging air and water (exhaust and drainage), as shown in FIG. 10 .

[0054] More specifically, the fuel cell 60 includes electrodes that react gas with hydrogen, and an exterior housing that houses devices such as the electrodes. As shown in Figures 6 and 11, the fuel cell 60 (exterior housing) has a generally cubic (or generally rectangular) external shape and has a pair of side surfaces 601, 601 facing one side and the other side in a direction perpendicular to the up-down direction (third direction), a front surface 602 facing one side in the direction perpendicular to the up-down direction and the side surfaces 601, and a back surface 603 facing the other side in the direction perpendicular to the up-down direction and the side surfaces 601.

[0055] The fuel cell 60 is mounted on the vehicle body 2. That is, the work vehicle 1 is equipped with the vehicle body 2 on which the fuel cell 60 is mounted. As described above, the driver's seat DS is supported by the vehicle body 2. Therefore, it can be said that the work vehicle 1 of this embodiment is equipped with the vehicle body 2 that supports the driver's seat DS and the fuel cell 60. The fuel cell 60 is disposed in front of the protection mechanism 5.

[0056] The fuel cell 60 is disposed in front of the windshield 50. The fuel cell 60 is placed on the vehicle body 2 (body frame 22) with the side surface 601 facing in the first direction (the same direction as the vertical surface of the vertical rib 201) and the front surface 602 facing forward in the second direction.

[0057] The fuel cell 60 is disposed near the protection mechanism 5. The fuel cell 60 is disposed in front of the protection mechanism 5. That is, the fuel cell 60 is disposed on the front frame 20 of the vehicle body frame 22, as shown in FIG. 11. The driver's seat DS and the fuel cell 60 are disposed side by side in the second direction (front-rear direction) on the vehicle body 2, as shown in FIGS. 12 and 13. Accordingly, the fuel cell 60 and the protection mechanism 5 are disposed side by side in the second direction (front-rear direction) on the vehicle body 2.

[0058] Specifically, the fuel cell 60 is disposed on a pair of vertical ribs 201, 201. As described above, the prime mover M (electric motor) is disposed between the pair of vertical ribs 201, 201, and therefore the fuel cell 60 is disposed above the prime mover M. The lower end of the fuel cell 60 is fixed to the vehicle body 2 (body frame 22). In this embodiment, the fuel cell 60 is fixed to the vehicle body 2 (body frame 22) with screws (see FIG. 11).

[0059] In this embodiment, the fuel cell 60 is arranged at a predetermined distance in front of the windshield 50 of the protection mechanism 5 in the second direction. Specifically, the fuel cell 60 is arranged so as to provide a space SP (predetermined distance) between the fuel cell 60 and the protection mechanism 5, in which the exhaust pipe 61 and the pressure reducing unit 66 are arranged.

[0060] With this arrangement, the back surface 603 of the fuel cell 60 (exterior body) faces the rear (protection mechanism 5). As shown in FIG. 10 , an exhaust port 600 is provided on the back surface 603 of the fuel cell 60 (exterior body). In this embodiment, the exhaust port 600 is located at the bottom on the other side of the back surface 603 in the first direction (the right side when viewed from the rear side). In addition, a connection port 604 for a supply pipe 67 that supplies gas (hydrogen) is provided on the back surface 603 of the fuel cell 60 (exterior body). The connection port 604 is provided in approximately the center of the back surface 603. Note that in the fuel cell 60 of this embodiment, connection ports for pipes, etc. connected to the ion exchanger 610, etc. are also located at appropriate locations on the back surface 603 of the exterior body.

[0061] In the work vehicle 1 of this embodiment, as shown in FIG. 11, in addition to the fuel cell 60 and the prime mover M, a radiator (hereinafter referred to as the first radiator) HE1 that exchanges heat between the cooling water that cools the power storage device 68 and the air (cooling air), a condenser CD for air conditioning in the driver's cab DR, an oil cooler OC for cooling the hydraulic oil that operates the hydraulic equipment of the coupling device 25, a battery B (in this embodiment, a lead-acid battery) that supplies power to the electrical equipment, and the like are arranged on the front frame 20.

[0062] The first radiator HE1, condenser CD, and battery B are disposed in front of the fuel cell 60 in the second direction. In this embodiment, the battery B, first radiator HE1, condenser CD, and oil cooler OC are disposed in this order from front to rear, with the oil cooler OC facing a front surface 602 of the fuel cell 60. As shown in FIGS. 4 and 5, of the side bonnet portions 81B, 81B described below of the bonnet 8, second members 84B, 84B that face a side surface 601 of the fuel cell 60 are configured to be breathable, and the second member 84B enables the intake or exhaust of outside air required for heat exchange between the first radiator HE1, condenser CD, and oil cooler OC.

[0063] 4 and 12, the discharge pipe 61 is disposed between the driver's seat DS and the fuel cell 60. In this embodiment, since the driver's seat DS is covered by the protection mechanism 5, the discharge pipe 61 is disposed between the protection mechanism 5 and the fuel cell 60. In other words, the discharge pipe 61 is disposed in a space SP provided between the fuel cell 60 and the protection mechanism 5.

[0064] As shown in FIGS. 10 and 12 , the discharge pipe 61 has a connection end E1 connected to the fuel cell 60 and an open end E2 through which exhaust and wastewater are discharged from the connection end E1. The connection end E1 of the discharge pipe 61 is connected to an exhaust port 600 provided on a rear surface 603 of the fuel cell 60. The open end E2 is located below the connection end E1. As shown in FIG. 10 , the open end E2 of the discharge pipe 61 faces downward or diagonally downward (diagonally downward in this embodiment). An end portion 61b of the discharge pipe 61 extends diagonally downward in the first direction (width direction). The discharge pipe 61 is located in front of the windshield 50 (front window) and behind the fuel cell 60. The discharge pipe 61 is located in front of or behind the step 56 (in this embodiment, in front of the step 56) (see FIG. 12 ). The discharge pipe 61 is also located in front of or behind the power storage device 68 (in this embodiment, in front of the step 56) (see FIG. 12 ). Furthermore, the terminal end 61b of the discharge pipe 61 is located above the lowest part of the vehicle body 2.

[0065] 10, the discharge pipe 61 has a first pipe portion 61a including a connection end E1 and a second pipe portion 61b including an open end E2, the second pipe portion 61b being a terminal end 61b directly or indirectly connected to the first pipe portion 61a. The second pipe portion 61b is a terminal end 61b including the open end E2 and is the terminal end 61b of the discharge pipe 61. In this embodiment, the second pipe portion 61b extends diagonally downward in the first direction. In the discharge pipe 61 of this embodiment, the second pipe portion 61b is indirectly connected to the first pipe portion 61a.

[0066] Specifically, the discharge pipe 61 has a first pipe section 61a, a third pipe section 61c connected to the first pipe section 61a and extending to one side in the first direction, a fourth pipe section 61d connected to the third pipe section 61c and extending downward from the third pipe section 61c, a fifth pipe section 61e connected to the fourth pipe section 61d and extending to one side in the first direction, and a second pipe section 61b connected to the fifth pipe section 61e.

[0067] In the work vehicle 1 of this embodiment, an electrical box 69 accommodating various electrical components, the electrical box 69 accommodating the power storage device 68, is attached to one side in the first direction of the vehicle body 2 (body frame 22). In this embodiment, the electrical box 69 accommodates the power storage device 68 (plurality of battery packs) on the rear side, and accommodates various electrical components on the front side of the power storage device 68. The electrical box 69 is one of the devices supported by the vehicle body 2, and is arranged to straddle an area corresponding to the space SP between the fuel cell 60 and the protection mechanism 5 in the second direction and an area corresponding to the protection mechanism 5. Accordingly, the electrical box is located closer to the vehicle body 2 than the step 56 in the first direction, and is arranged to overlap with the step 56 when viewed from the first direction (see FIG. 4).

[0068] Accordingly, the third pipe 61c extends to a position beyond one side surface of the vehicle body 2 (body frame 22), and the fourth pipe 61d extends close to the top surface of the electrical box 69. Accordingly, the fifth pipe 61e extends in the first direction at a position forward of the power storage device 68 on the electrical box 69, and the second pipe 61b extends diagonally downward to the side of the electrical box 69. As a result, the open end E2 of the discharge pipe 61 (second pipe 61b) is located above the lower end of the vehicle body 2. In other words, the open end E2 is located outside the electric box (equipment).

[0069] As a result, the discharge pipe 61 descends sequentially (in stages) from the connection end E1 side toward the open end E2, and air and water discharged from the fuel cell 60 can be discharged from the open end E2. Also, with the above-mentioned arrangement, the discharge pipe 61 does not get in the way of workers getting on and off the vehicle, and the discharged air and water are prevented from splashing on surrounding equipment. Furthermore, since the open end E2 of the discharge pipe 61 (second pipe section 61b) is located above the lower end of the vehicle body 2, the open end E2 is prevented from contacting the ground and becoming blocked, and the discharge of exhausted water (air and water) is ensured.

[0070] The tank 62 contains (stores) gas to be supplied to the fuel cell 60. In this embodiment, the fuel cell 60 generates electricity by reacting hydrogen with oxygen in the air. Accordingly, hydrogen (hydrogen gas) is stored as gas in the tank 62. The work vehicle 1 of this embodiment is equipped with a plurality of tanks 62, as shown in FIG. 6. Each of the plurality of tanks 62 is elongated in one direction. Specifically, as shown in FIG. 14, each of the plurality of tanks 62 has a cylindrical body portion 620 and a pair of head portions 621, 621 that close both end openings of the body portion 620. The length in the direction in which the center line of the body portion 620 extends is set to be longer than the diameter of the body portion 620 of the tank 62. A filling pipe 63 for filling the tank 62 with gas and a supply pipe 67 for supplying gas to the fuel cell 60 are fluidly connected to one head portion 621 of the pair of head portions 621, 621.

[0071] In this embodiment, an electrically operated on-off valve V1 that is opened and closed by the control device 10 is attached to one of the mirror parts 621 of each of the multiple tanks 62, and each of the branch pipes that branch off the single filling pipe 63 into multiple pipes and each of the branch pipes that branch off the single supply pipe 67 into multiple pipes are fluidly connected to the on-off valve V1 of the corresponding tank 62. As a result, by switching between opening and closing the flow path with the on-off valve V1, it is possible to switch between a state in which the tank 62 and the filling pipe 63 are in communication with each other while blocking communication between the tank 62 and the supply pipe 67 (a state in which the tank 62 is being filled with gas), and a state in which the tank 62 is in communication with the filling pipe 63 while blocking communication between the tank 62 and the supply pipe 67 (a state in which gas is being supplied from the tank 62 to the fuel cell 60).

[0072] In this embodiment, the multiple tanks 62 are arranged side by side in the first direction with their respective longitudinal directions (directions in which the center lines of the body portions 620 extend) aligned with the second direction. More specifically, one mirror portion 621 of each of the multiple tanks 62 is positioned rearward in the second direction relative to the other mirror portion 621. As a result, gas is supplied (filled) to each of the multiple tanks 62 and supplied from the multiple tanks 62 to the fuel cell 60 from the rear side in the second direction (one of the mirror portions 621).

[0073] In this embodiment, the tank 62 is disposed above the fuel cell 60, as shown in Figures 1, 4, 5, and 6. More specifically, the tanks 62 are disposed above the protection mechanism 5 (roof 52 of the cabin 5) by interposing a frame 7 supported by the vehicle body 2 (vehicle body frame 22).

[0074] In this embodiment, as shown in Fig. 6, the work vehicle 1 is provided with a storage case 75 that stores a plurality of tanks 62... and an exterior cover 76 that covers the storage case 75. The storage case 75 is a case with a rectangular parallelepiped appearance, and is supported by the frame 7 while storing the plurality of tanks 62.... Therefore, in the work vehicle 1 of this embodiment, the plurality of tanks 62... are supported by the vehicle body 2 (vehicle body frame 22) via the storage case 75 and the frame 7. The work vehicle 1 of this embodiment is provided with a radiator (hereinafter referred to as a second radiator HE2) that performs heat exchange between cooling water that cools the fuel cell 60 and air (cooling air).

[0075] The second radiator HE2 is disposed in front of the housing case 75 and is supported by the frame 7. An exterior cover 76 covers the housing case 75 and the second radiator HE2. Since the second radiator HE2 is disposed in front of the housing case 75, a ventilation opening is provided in the vertical surface of the exterior cover 76 facing forward in the second direction. A mesh is disposed in the opening to prevent foreign matter from entering the exterior cover 76 where the second radiator HE2 is located.

[0076] The filling pipe 63 is arranged along the frame 7. When the tank 62 of this embodiment is accommodated in the accommodation case 75, the filling pipe 63 (branch pipe) and the supply pipe 67 (branch pipe) are connected to one of the mirror parts 621 on the rear side in the second direction. Accordingly, the filling pipe 63 and the supply pipe 67 penetrate the accommodation case 75 and are arranged along the frame 7. In this embodiment, the filling pipe 63 is arranged along a third support leg 70c (described later) on the rear side, as shown in FIG. 15. The filling pipe 63 is a metal pipe 63 that is bent to follow a predetermined path along its entire length. In contrast, the supply pipe 67 is arranged along a second support leg 70b (described later) in the middle, and extends into a space SP between the fuel cell 60 and the protection mechanism 5.

[0077] 16 and 17, a starting end 63a of the filling pipe 63 is connected to a connection device 64. In contrast, a terminal end (terminal end of the branch pipe) of the filling pipe 63 is connected to a tank 62 (see FIG. 14). In this embodiment, as shown in FIG. 16, the connection device 64 and the filling pipe 63 are connected in an attitude in which the direction of the center line of the opening of the gas filling port 640 of the connection device 64 and the center line of the opening of the starting end 63a of the filling pipe 63 extend in a first direction. Accordingly, the starting end 63a of the filling pipe 63 extends in the first direction at a specified position where it connects to the connection device 64.

[0078] The connection device 64 is attached to the frame 7 via a support structure 65. In this embodiment, the connection device 64 is connected to the filling pipe 63 in a first direction perpendicular to the third direction.

[0079] More specifically, the connection device 64 includes a main body 641 including a gas fill port 640, and a lid member 642 that covers the gas fill port 640. The main body 641 also includes a nozzle member 643 having the gas fill port 640, and a nozzle support member 644 that supports the nozzle member 643. The connection device 64 may connect the main body 641 (nozzle support member 644) to the support structure 65, but the connection device 64 of this embodiment includes a device connecting portion 645 for connecting the main body 641 to the support structure 65. The main body 641 also includes a detection switch 646 that detects whether a connection nozzle for supplying gas from outside is connected to the nozzle member 643.

[0080] The nozzle support member 644 has a flat support plate portion 644a and an annular wall portion 644b connected to the outer periphery of the support plate portion 644a. The nozzle member 643 has a gas fill port 640 at one end and a connecting end portion at the opposite end for connecting to the piping 63. The nozzle member 643 is fixed to the support plate portion 644a with the gas fill port 640 located within the area surrounded by the annular wall portion 644b and penetrating the support plate portion 644a.

[0081] The detection switch 646 is fixed to the support plate 644a while being positioned within the area surrounded by the annular wall 644b. Accordingly, the wiring connected to the detection switch 646 penetrates the support plate 644a, exits to the outside, and is connected to the control device 10 (see FIG. 8). As a result, the control device 10 determines whether the connection nozzle is connected to the connection device 64 (nozzle member 643) based on the detection result of the detection switch 646, and instructs the on-off valve V1 to switch between opening and closing the flow path based on the determination result. In other words, when the control device 10 determines that the connection nozzle is connected to the connection device 64 (nozzle member 643), it instructs the on-off valve V1 to connect the tank 62 and the filling pipe 63 (to cut off the communication between the tank 62 and the supply pipe 67).

[0082] The lid member 642 is configured to be able to fit into the main body 641 in a state where the opening of the annular wall portion 644b is closed (in a state where the gas filling port 640 and the detection switch 646 are covered).

[0083] The device connecting portion 645 includes a mounting plate 645a fixed to the support structure 65 (a base member 651 described later) and a connecting piece 645b connecting the mounting plate 645a to the main body portion 641 (the support plate portion 644a) with the mounting plate 645a facing the support plate portion 644a. The connecting piece 645b maintains the mounting plate 645a at a predetermined distance from the support plate portion 644a. That is, the connecting piece 645b ensures a space for the beginning end 63a of the filling pipe 63 between the mounting plate 645a and the support plate portion 644a. Note that in FIG. 16, the beginning end 63a of the filling pipe 63 is not positioned between the mounting plate 645a and the support plate portion 644a. However, as shown in FIG. 17, during assembly, the beginning end 63a of the filling pipe 63 extends beyond the base member 651 and the mounting plate 645a and is positioned between the mounting plate 645a and the support plate portion 644a.

[0084] The mounting plate 645a has a plurality of insertion holes H1... for inserting bolts 650a (male thread members) included in the fastening member 650 therethrough, which are formed in the thickness direction (first direction) of the mounting plate 645a.

[0085] As described above, the connection device 64 is connected to the filling pipe 63 in the first direction (width direction) perpendicular to the third direction. On this premise, the support structure 65 fixes the connection device 64 to the frame 7. In this embodiment, the support structure 65 fixes the connection device 64 to the third support leg 70c.

[0086] The support structure 65 is capable of adjusting the position of the connection device 64 in a direction perpendicular to the direction in which the filling pipe 63 is connected when the filling pipe 63 is not connected to the connection device 64. As described above, the connection device 64 is connected to the filling pipe 63 in a first direction perpendicular to the third direction. Based on this, the support structure 65 is capable of adjusting the position of the connection device 64 in at least one of the third direction and the second direction perpendicular to the first direction. The support structure 65 of this embodiment is capable of adjusting the position of the connection device 64 in each of the third direction and the second direction.

[0087] The support structure 65 includes a fastening member 650 and a base member 651 to which the connection device 64 and the frame 7 are fastened by the fastening member 650. The fastening member 650 is a combination of a bolt 650a and a nut 650b into which the bolt 650a is screwed. The support structure 65 is capable of adjusting the position of the connection device 64 by changing the relative positions of at least two of the connection device 64, the frame 7, and the base member 651.

[0088] The support structure 65 is capable of adjusting the position of the connection device 64 by changing the relative positions of at least two of the connection device 64, the frame 7, and the base member 651. In this embodiment, the connection device 64 is fixed to a bracket 703 (described later) of the frame 7. Therefore, the support structure 65 is capable of adjusting the position of the connection device 64 by changing the relative positions of at least two of the connection device 64, the bracket 703, and the base member 651.

[0089] 18, the support structure 65 is capable of adjusting the position of the connection device 64 in at least one of the third direction and the second direction. In this embodiment, the support structure 65 is capable of adjusting the position of the connection device 64 in each of the second direction and the third direction. Accordingly, elongated insertion holes H2 and H3, through which the fastening member 650 (bolt 650a) is inserted, are formed in at least one of the connection device 64, the base member 651, and the frame 7 (bracket 703).

[0090] Specifically, as shown in Figures 16 and 18, the support structure 65 of this embodiment has a first insertion hole H2 in the form of a long hole extending in the third direction in the base member 651, and a second insertion hole H3 in the form of a long hole extending in the second direction in the frame 7 (bracket 703).

[0091] That is, the base member 651 is provided with elongated first insertion holes H2 through which the bolts 650a inserted through the insertion holes H1 of the mounting plate 645a are inserted. In the present embodiment, as described above, the mounting plate 645a of the connection device 64 is provided with a plurality of circular insertion holes H1..., and therefore the base member 651, which is overlaid on the mounting plate 645a, is provided with a plurality of elongated first insertion holes H2 extending in the third direction corresponding to the arrangement and number of the insertion holes H1... of the mounting plate 645a. A retaining member 652 is arranged on the side of the base member 651 opposite the mounting plate 645a side, and the bolts 650a inserted through the first insertion holes H2... are inserted into the retaining member 652, and then a nut 650b is screwed onto the bolts 650a. As a result, by screwing (tightening) the nut 650b onto the bolt 650a, the connection device 64 is fixed to the base member 651, and by releasing the screwing onto the bolt 650a, the position of the connection device 64 can be adjusted in the third direction.

[0092] In this way, since the retaining member 652 and the nut 650b are located on the side opposite to the mounting plate 645a side of the base member 651, the frame 7 (bracket 703) that is superimposed on the side opposite to the mounting plate 645a with respect to the base member 651 is provided with an opening 704 for preventing interference with the retaining member 652 and the nut 650b. That is, the frame 7 (bracket 703) is provided with an escape hole 704 in which the retaining member 652 and the nut 650b are disposed.

[0093] The bracket 703 of the frame 7 is provided with a plurality of (four in this embodiment) second insertion holes H3 at positions that avoid the relief holes 704. Accordingly, the base member 651 that is overlaid on the bracket 703 is provided with a plurality of round third insertion holes H4 that correspond to the arrangement and number of the second insertion holes H3 of the bracket 703.

[0094] In this embodiment, a nut 650b constituting the fastening member 650 is disposed concentrically or approximately concentrically with the third insertion hole H4 on the base member 651 and fixed by welding. That is, the base member 651 has a back nut 650b concentric with the third insertion hole H4. As a result, the base member 651 is fixed in a fixed position relative to the bracket 703 by inserting the bolt 650a inserted into the second insertion hole (long hole) H3 of the bracket 703 into the third insertion hole H4 of the base member 651 and then screwing (fastening) the nut (back nut) 650b. On the other hand, when the bolt 650a is released from the nut (back nut) 650b (loosening the fastening), the position of the base member 651 (the connection device 64 fixed to the base member 651) becomes changeable in the second direction.

[0095] This makes it possible to easily connect the connection end of the nozzle member 643 of the connection device 64 to the end of the filling pipe 63, even if their positions are misaligned in the second and third directions, because the connection device 64 (nozzle member 643) can be aligned with the position of the starting end (end) 63a of the filling pipe 63.

[0096] Furthermore, when the connection device 64 (nozzle member 643) is aligned with the end of the filling pipe 63 (connected state), the connection device 64 is fixed in a fixed position by fastening with the bolt 650a and nut 650b, so that no unnecessary load (stress) acts on the connection portion between the nozzle member 643 and the filling pipe 63, thereby preventing gas leaks, etc.

[0097] As shown in FIGS. 10 and 19 , the pressure reducing unit 66 is disposed in a space SP provided between the fuel cell 60 and the driver's seat DS (protection mechanism 5). In this embodiment, the pressure reducing unit 66 can be operated from the other side in the first direction. That is, the pressure reducing unit 66 is disposed in the space SP on the other side of the center in the first direction. The pressure reducing unit 66 can reduce the pressure in the tank 62. In this embodiment, the pressure reducing unit 66 reduces the pressure in the tank 62 by releasing gas (air) in the tank 62 to the outside. That is, the pressure reducing unit 66 includes a gas exhaust valve 660 that exhausts gas from a path (supply piping 67) connected to the tank 62. In this embodiment, the pressure reducing unit 66 (gas exhaust valve 660) exhausts gas from the supply piping 67, which is a piping that communicates (connects) the tank 62 (in this embodiment, a plurality of tanks 62...) and the fuel cell 60.

[0098] In this embodiment, as shown in FIG. 20 , the pressure reducing unit 66 is a T-type joint 661 having three connection ports P1, P2, and P3. Two of the three connection ports P1, P2, and P3, P1 and P2, are connected to a primary supply pipe 67a connected to the tank 62 and a secondary supply pipe 67b connected to the fuel cell 60, respectively. The T-type joint 661 also includes a gas exhaust valve 660 connected to the remaining connection port P3 of the T-type joint 661. The gas exhaust valve 660 is a pressure-relieving valve capable of releasing pressure. The gas exhaust valve 660 of this embodiment is an automatic or manual on-off valve having primary and secondary connection ports P4 and P5, and the remaining connection port P3 of the T-type joint 661 is connected to the primary connection port P4. The pressure reducing unit 66 of this embodiment has an external connection port 660a to which a diffusion pipe DP for releasing hydrogen to the outside can be connected. The diffusion pipe DP can be connected to the external connection port 660a from the outside on the other side of the first direction. In this embodiment, the external connection part 660a is connected to the secondary-side connection port P5 of the gas exhaust valve 660 and is integrated with the gas exhaust valve 660. In the pressure reducing section 66 of this embodiment, the external connection part 660a is attached to a mounting bracket 96 that is connected to the support frame 9 and to an extension member 95, thereby being positioned at a fixed position. That is, the external connection part 660a is supported by the mounting bracket 96 that is supported by the support frame 9, which is a rigid body (see FIG. 19 ).

[0099] In this embodiment, the gas exhaust valve 660 is a manual on-off valve that is opened and closed by (manually) operating the handlebar H. The gas exhaust valve 660 is disposed within a range corresponding to the space between the pair of wheels 30FR, 30FL, 30RR, and 30RL. That is, the gas exhaust valve 660 is disposed (located) between the first wheel 30FR, rear wheel 30RR and the second wheel 30FL, rear wheel 30RL. The gas exhaust valve 660 is also disposed (located) between the front wheels 30FR, 30FL and the rear wheels 30RR, 30RL. The gas exhaust valve 660 is disposed (located) between the tank 62 and the fuel cell 60. Specifically, in this embodiment, the tank 62 is located diagonally above and rearward of the fuel cell 60, and therefore the gas exhaust valve 660 is disposed between the tank 62 and the fuel cell 60 when viewed from the first direction. In this embodiment, the gas exhaust valve 660 is disposed (located) below the tank 62.

[0100] Specifically, the gas exhaust valve 660 is provided in a path connecting the tank 62 and the fuel cell 60. That is, the gas exhaust valve 660 is provided in the supply pipe 67 (between the primary-side and secondary-side supply pipes 67b). The gas exhaust valve 660 is disposed inside the hood 8. That is, the gas exhaust valve 660 is disposed inside the hood 8 between the fuel cell 60 and the driver's seat DS. In this embodiment, since the driver's seat DS is covered by the protection mechanism 5, the entire pressure reducing unit 66 including the gas exhaust valve 660 is disposed in the space SP between the back surface 603 of the fuel cell 60 and the windshield 50 of the protection mechanism 5. The gas exhaust valve 660 is located in approximately the center of the space SP in the third direction. Furthermore, in this embodiment, the gas exhaust valve 660 is disposed on the other side in the first direction of the center line of the vehicle body 2 extending in the second direction.

[0101] In this embodiment, in addition to the gas exhaust valve 660, an air cleaner and an ion exchanger 610 are arranged in the space SP between the rear surface 603 of the fuel cell 60 and the windshield 50 of the protection mechanism 5. Accordingly, the gas exhaust valve 660 is arranged so as to bypass the air cleaner and the ion exchanger 610. In other words, the air cleaner and the ion exchanger 610 are arranged so as to bypass the gas exhaust valve 660. In this embodiment, the air cleaner is arranged on one side in the first direction, and the ion exchanger 610 is arranged above the gas exhaust valve 660. In this embodiment, the gas exhaust valve 660 is supported by a mounting bracket 96 connected to an extension member 95, which will be described later.

[0102] As shown in FIGS. 1 to 6, the frame 7 is supported by the vehicle body 2. The frame 7 is disposed above the rear wheels 30RR, 30RL. More specifically, as shown in FIG. 21, the frame 7 includes support legs 70a, 70b, 70c supported by frame supports 23a, 23b, 23c, which extend upward, and connecting beams 70d... connected to the upper ends of the support legs 70a, 70b, 70c and extending in a direction perpendicular to the third direction, on which the tank 62 is directly or indirectly placed. The support legs 70a, 70b, 70c are provided in accordance with the number and arrangement of the frame supports 23a, 23b, 23c of the vehicle body 2.

[0103] In this embodiment, the vehicle body 2 has three frame supports 23a, 23b, 23c (first frame support 23a, second frame support 23b, third frame support 23c) on each side in the first direction, and therefore the frame 7 has a total of six support legs 70a, 70b, 70c. That is, the frame 7 has three support legs 70a, 70b, 70c on one side in the first direction and three support legs 70a, 70b, 70c on the other side in the first direction.

[0104] In this embodiment, the support leg 70a (hereinafter referred to as the first support leg 70a) supported by the first frame support portion 23a is inclined rearward in the second direction from its lower end supported by the first frame support portion 23a to its upper end. In contrast, the support leg 70b (hereinafter referred to as the second support leg 70b) supported by the second frame support portion 23b extends straight upward (vertically) from its lower end supported by the second frame support portion 23b to its upper end. The support leg 70c (hereinafter referred to as the third support leg 70c) supported by the third frame support portion 23c has a bent portion 710 that is convex rearward at a position midway in the third direction when viewed from the first direction.

[0105] The first support leg 70a is made of a round steel pipe, and the second support leg 70b and the third support leg 70c are made of a square steel pipe.

[0106] The third support leg 70c is a lower leg 700c supported by the third frame support part 23c, and includes a lower leg 700c extending upward from the third frame support part 23c and an upper leg 701c connected to the lower leg 700c and extending upward from the lower leg 700c. The lower leg 700c slopes rearward in the second direction as it extends upward. In contrast, the upper leg 701c slopes forward as it extends upward. This provides the third support leg 70c with a bent portion 710 at the connection between the lower leg 700c and the upper leg 701c.

[0107] In this embodiment, the lower leg 700c and the upper leg 701c are misaligned in the first direction. That is, the upper leg 701c is positioned outward of the lower leg 700c in the first direction. In this embodiment, the upper leg 701c is positioned above the rear wheels 30RR, 30RL, and the lower leg 700c is positioned more inward of the rear wheels 30RR, 30RL (toward the vehicle body 2) than the upper leg 701c. Accordingly, the lower leg 700c and the upper leg 701c are connected via a cross beam 702c extending in the first direction.

[0108] As described above, the support legs 70a, 70b, 70c are provided in accordance with the number and arrangement of the frame support portions 23a, 23b, 23c of the vehicle body 2, and therefore the frame 7 has a pair of each of the first support legs 70a, the second support legs 70b, and the third support legs 70c. The pair of first support legs 70a, the pair of second support legs 70b, and the pair of third support legs 70c are each arranged at intervals in the first direction (with the vehicle body 2 interposed therebetween).

[0109] As described above, the pair of third support legs 70c includes lower leg portions 700c and upper leg portions 701c that are offset in the first direction, and therefore the lower leg portions 700c of the pair of third support legs 70c are disposed between the pair of rear wheels 30RR, 30RL, and the upper leg portions 701c of the pair of third support legs 70c are disposed above the pair of rear wheels 30RR, 30RL. In this embodiment, the cross beam 702c connecting the lower leg portions 700c and the upper leg portions 701c is configured as a common cross beam 702c of the pair of third support legs 70c. In other words, the upper leg portions 701c and lower leg portions 700c of the pair of third support legs 70c are connected and integrated by a common (single) cross beam 702c.

[0110] A bracket 703 for attaching the connection device 64 is fixed to one of the pair of third support legs 70c, 70c. The bracket 703 is formed in a plate shape, extends rearward in the second direction from one of the third support legs 70c, and has an attachment surface facing outward in the first direction. In this embodiment, the bracket 703 is disposed at the lower end (near the bent portion 710) of the upper leg portion 701c. In other words, the bracket 703 is disposed above the rear wheel 30RL (see FIG. 1).

[0111] The upper ends of the pair of first support legs 70a, the pair of second support legs 70b, and the pair of third support legs 70c are at the same or approximately the same height and are connected via a plurality of connecting beams 70d (connecting beams 70d extending in a first direction and connecting beams 70d extending in a second direction). The plurality of connecting beams 70d form a framework on which the accommodating case 75 can be placed. As described above, the second radiator HE2, which exchanges heat between the air and the coolant that cools the fuel cell 60, is disposed in front of the accommodating case 75. Therefore, metal fittings (not shown) that extend to both sides of the second radiator HE2 are attached to the pair of first support legs 70a, 70a, and both ends of the second radiator HE2 are supported via these metal fittings.

[0112] The power storage device 68 is a secondary battery capable of storing electricity. A lead battery, a lithium ion battery, or the like may be used for the power storage device 68. The power storage device 68 of this embodiment has a plurality of battery modules each including a plurality of battery cells (lithium ion batteries) electrically connected (in series), and a battery case that houses the plurality of battery modules. In other words, the power storage device 68 is a battery pack in which a plurality of battery modules are housed in a battery case and the plurality of battery modules are electrically connected (for example, in series).

[0113] The power storage device 68 (battery pack) is electrically connected to the fuel cell 60. The power storage device 68 is also electrically connected to electrical equipment such as the prime mover M (electric motor). As a result, the power storage device 68 stores electric power from the fuel cell 60 and supplies the stored electric power to electrical equipment (electrical components) such as the prime mover M (electric motor). As shown in FIGS. 4 and 12 , in this embodiment, the power storage device 68 is disposed on one side in the first direction with respect to the vehicle body 2, as described above. The power storage device 68 is also disposed below the protection mechanism 5. More specifically, in this embodiment, the power storage device 68 is housed in an electrical component box 69 that is disposed on one side in the first direction with respect to the vehicle body 2 and below the protection mechanism 5.

[0114] 22, the hood 8 defines an equipment housing compartment MR that houses at least the fuel cell 60. That is, the work vehicle 1 is equipped with a hood 8 that houses the fuel cell 60. The work vehicle 1 is equipped with covers 85B, 85B that cover at least a portion of the gas exhaust valve 660. In this embodiment, the hood 8 includes covers 85B, 85B that face the gas exhaust valve 660.

[0115] 1, 22, and 23, the hood 8 includes a first hood 8A that can be opened and closed, and a second hood 8B that cannot be opened and closed. The second hood 8B covers the fuel cell 60.

[0116] The first hood 8A is attached to the fuel cell 60 so as to be able to open and close. The second bonnet 8B is disposed in front of the protection mechanism 5, and the first bonnet 8A is disposed in front of the second bonnet 8B.

[0117] The second bonnet 8B is disposed in front of the protection mechanism 5. The first bonnet 8A is disposed in front of the second bonnet 8B. That is, the first bonnet 8A covers approximately half of the area on the front side in the second direction of the front frame 20 of the vehicle body 2, and the second bonnet 8B covers approximately half of the area on the rear side in the second direction of the front frame 20 of the vehicle body 2. Accordingly, the first bonnet 8A covers the first radiator HE1, the air conditioning condenser CD, the oil cooler OC that cools the hydraulic oil, the battery B, etc., which are disposed on the front frame 20.

[0118] In this embodiment, headlights and a front grille that illuminate the area ahead of the work vehicle 1 are attached to the first bonnet 8A. Specifically, as shown in Fig. 1 , the first bonnet 8A includes a front mask portion 80A facing the second direction, an upper panel portion 81A extending rearward in the second direction from an upper end of the front mask portion 80A in the third direction, and a pair of side panel portions 82A, 82A extending rearward in the second direction from both ends of the front mask portion 80A in the first direction. The front mask portion 80A, the upper panel portion 81A, and the pair of side panel portions 82A, 82A are interconnected and combined into an integral unit.

[0119] The front mask portion 80A includes a front grille and headlights. The upper panel portion 81A is located above the vehicle body 2 in the third direction. That is, the upper panel portion 81A faces the power storage device 68, the first radiator HE1, the condenser CO, and the oil cooler OC from above. The pair of side panel portions 82A, 82A face the power storage device 68, the first radiator HE1, the condenser CO, and the oil cooler OC from the sides (first direction). As a result, the first bonnet 8A covers the power storage device 68, the first radiator HE1, the condenser CO, and the oil cooler OC, which are arranged in approximately half of the area of ​​the front side of the front frame 20 in the second direction.

[0120] In this embodiment, the other end of the upper panel portion 81A on the rear side in the second direction is connected to the top of the fuel cell 60 via a hinge 86 including a rotation axis extending in the first direction. This allows the first bonnet 8A to be opened and closed with the rear side in the second direction as the rotation fulcrum.

[0121] The second bonnet 8B is disposed between the first bonnet 8A and the protection mechanism 5. Accordingly, the second bonnet 8B faces the upper surface and the side surface 601 of the fuel cell 60. In other words, the second bonnet 8B covers the fuel cell 60 from above.

[0122] In this embodiment, the second bonnet 8B is made up of multiple parts, as shown in Figures 23 to 25. Specifically, the second bonnet 8B has an upper bonnet portion 80B that covers the fuel cell 60 from above, and a pair of side bonnet portions 81B, 81B that are arranged on both sides of the fuel cell 60 in the first direction.

[0123] The upper bonnet portion 80B closes the gap between the first bonnet 8A and the protection mechanism 5 above the fuel cell 60. The upper bonnet portion 80B is a single part and has a top plate portion 800B disposed above the fuel cell 60 and a pair of hanging portions 801B, 801B hanging downward from both ends of the top plate portion 800B in the first direction. The upper bonnet portion 80B is disposed between the first bonnet 8A and the protection mechanism 5. In this state, the top plate portion 800B is continuous with the upper panel portion 81A of the first bonnet 8A in the second direction. The pair of hanging portions 801B, 801B are continuous with the upper ends of the pair of side panel portions 82A, 82A of the first bonnet 8A in the second direction.

[0124] The pair of side bonnet portions 81B, 81B are respectively arranged below the pair of hanging portions 801B, 801B of the upper bonnet portion 80B, and close the gap between the side panel portion 82A of the first bonnet 8A and the protection mechanism 5.

[0125] Specifically, the second bonnet 8B (each of the pair of side bonnet portions 81B, 81B) includes a pair of first members 83B, 83B that are arranged below each of the pair of hanging portions 801B, 801B of the upper bonnet portion 80B and are continuous with each of the pair of hanging portions 801B, 801B, a pair of second members 84B, 84B that are arranged below each of the pair of first members 83B, 83B and face the side surface 601 of the fuel cell 60, and a pair of third members 85B, 85B that are arranged below each of the pair of first members 83B, 83B and close the gap between the second members 84B, 84B and the protection mechanism 5.

[0126] On one side and the other side in the first direction, the first members 83B, 83B are arranged contiguously in the third direction with the hanging portion 801B of the upper bonnet portion 80B. Further, the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B are arranged contiguously in the second and third directions. Furthermore, the first members 83B, 83B and the second members 84B, 84B are arranged contiguously in the second direction with the side panels of the first bonnet 8A.

[0127] In this embodiment, the second members 84B, 84B are configured to allow ventilation between the inside and outside of the hood 8. In this embodiment, the second members 84B, 84B include a frame portion that forms the outer periphery of the second members 84B, 84B, and a ventilation portion that allows ventilation and is provided within the frame portion. In this embodiment, the ventilation portion is formed in a grill shape. Here, a grill is a configuration in which multiple vertical or horizontal bars are arranged at equal or uneven intervals, allowing ventilation between the vertical or horizontal bars. Note that the ventilation portion may be a grill shape, a mesh shape (net shape), or a punching board shape with a large number of through holes.

[0128] In this embodiment, the hood 8 includes removable covers 85B. In this embodiment, the second hood 8B includes covers 85B that cover the target components. Specifically, in the second hood 8B, with the pair of side hood portions 81B fixed in place, the upper hood portion 80B is connected to the pair of side hood portions 81B by fitting. In contrast, the first members 83B, 83B, second members 84B, 84B, and third members 85B, 85B that constitute the pair of side hood portions 81B, 81B are fixed to a support frame 9 that is fixed to the fuel cell 60.

[0129] More specifically, the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B each have a plurality of coupled portions SH1, SH2, SH3 that are coupled to coupling portions 92 (described later) of the support frame 9. In the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B, respectively, the coupled portions SH1, SH2, SH3 are arranged at intervals in the second direction.

[0130] Furthermore, in each of the second members 84B and the third members 85B, 85B, the multiple coupled portions SH2, SH3 are also spaced apart in the third direction. That is, the multiple coupled portions SH1 in the first member 83B are arranged in a row at intervals in the second direction, and the multiple coupled portions SH2, SH3 in each of the second members 84B and the third members 85B are arranged in multiple rows at intervals in the second and third directions. In this embodiment, each of the multiple coupled portions SH1, SH2, SH3 is an insertion hole (through hole) through which a male thread member (bolt) Bt is inserted to be screwed into the screw hole (tapped hole or back nut) T1, T2, T3 of the coupling portion 92, and penetrates in the first direction.

[0131] Accordingly, the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B can be removed outward in the first direction by removing the male thread members (bolts) Bt, and therefore, if the equipment opposite them requires operation or work, at least one of the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B may be attached and detached as covers 85B, 85B.

[0132] In this embodiment, the third member 85B on the other side in the first direction faces, from the other side in the first direction, the gas exhaust valve 660 that is disposed in the space SP between the fuel cell 60 and the protection mechanism 5. That is, the third members 85B, 85B function as covers 85B, 85B that cover the gas exhaust valve 660. The third members 85B, 85B can be attached and detached by attaching and detaching the male thread members (bolts) Bt.

[0133] More specifically, each of the pair of third members 85B, 85B on both sides in the first direction is disposed in correspondence with the space SP between the fuel cell 60 and the protection mechanism 5, and covers the devices and the like disposed in the space SP. That is, in this embodiment, the gas exhaust valve 660 is disposed on the other side in the first direction in the space SP between the fuel cell 60 and the protection mechanism 5, and therefore the third member 85B of the side bonnet portion 81B on the other side in the first direction functions as a detachable cover 85B that covers the gas exhaust valve 660.

[0134] Accordingly, the third members 85B, 85B of the side bonnet portion 81B on the other side in the first direction protect the devices that require operation, etc. for maintenance work, etc., while also functioning as covers 85B, 85B that are removable when performing maintenance on the devices, etc. Also, the third member 85B of the side bonnet portion 81B on one side in the first direction functions as a removable cover 85B that covers other devices.

[0135] As described above, various pipes and wiring are connected to the back surface 603 of the fuel cell 60. That is, pipes such as the supply pipe 67 and electrical wiring (harness) are arranged in the space SP between the fuel cell 60 and the protection mechanism 5. In particular, in the work vehicle 1 of this embodiment, the tank 62 connected to the fuel cell 60 via the supply pipe 67 and the second radiator HE2 connected to a pipe for circulating coolant are disposed outside the hood 8 (above the protection mechanism 5). Therefore, the various pipes and wiring arranged in the space SP between the fuel cell 60 and the protection mechanism 5 must be led out of the space SP. Accordingly, the third members (covers) 85B, 85B are formed with cutout portions 850B for arranging wiring to be led out (the pipe PL (see FIGS. 4 and 5, etc.) connected to the second radiator HE2 and the supply pipe 67).

[0136] In this embodiment, the second support leg 70b of the frame 7 disposed on the outside of the vehicle body 2 in the first direction is located in a position overlapping with the fuel cell 60 (on the front side of the space SP), and the third members 85B, 85B are located in a position not overlapping with the second support leg 70b when viewed from the first direction. This allows the third members 85B, 85B to be attached and detached without being obstructed by the frame 7 (second support leg 70b) that supports the tank 62.

[0137] The support frame 9 connects the fuel cell 60 to the inside of the hood 8. In this embodiment, the support frame 9 connects the fuel cell 60 to the second hood 8B. As a result, the second hood 8B is connected to the fuel cell 60 by the support frame 9, and the relative positional relationship with the fuel cell 60 is constant.

[0138] The support frame 9 is connected to a side surface 601 of the fuel cell 60. As shown in FIGS. 26 to 28, the support frames 9 are arranged on both sides of the fuel cell 60, and each extends in the third direction. The support frame 9 connects the fuel cell 60, the bonnet 8, and the vehicle body 2. The support frame 9 connects the fuel cell 60 and the second bonnet 8B. As shown in FIGS. 26 and 27, the support frame 9 has mounting portions 90 for mounting electronic devices or harnesses.

[0139] The support frame 9 has a main body portion 91 extending in the third direction and a connecting portion 92 connected to the main body portion 91 and connected to the hood 8. In this embodiment, the work vehicle 1 is equipped with a plurality of support frames 9... Each of the plurality of support frames 9... has a main body portion 91 extending in the third direction and a connecting portion 92 connected to the main body portion 91 and connected to the hood 8.

[0140] The multiple support frames 9 are arranged on both sides of the fuel cell 60 in the first direction. In this embodiment, three support frames 9 are arranged on each of one side (one side) of the fuel cell 60 in the first direction and the other side (other side) of the fuel cell 60 in the first direction.

[0141] In each of the multiple support frames 9, the main body 91 extends from the side surface 601 of the fuel cell 60 to the vertical rib 201 of the front frame 20. Specifically, the main body 91 of the support frame 9 has an upper end and a lower end, and the upper end is fixed (screwed or welded) to the side surface 601 of the fuel cell 60, and the lower end is fixed (screwed or welded) to the vertical rib 201 of the front frame 20. In this embodiment, the main body 91 of the support frame 9 has an upper end and a lower end, and the upper end is fixed (screwed or welded) to the side surface 601 of the fuel cell 60, and the lower end is fixed (screwed or welded) to the vertical rib 201 of the front frame 20.

[0142] The connecting portion 92 protrudes outward from the main body portion 91 and has a connecting surface S that faces (is in face contact with) the inner surface of the member to be connected (one of the first members 83B, 83B, the second members 84B, 84B, or the third members 85B, 85B) that is positioned at a predetermined position (fixed position) (one of the first members 83B, 83B, the second members 84B, 84B, or the third members 85B, 85B).

[0143] Specifically, the connecting portion 92 includes an abutment piece 920 including a connecting surface S, and a connecting piece 921 that connects the main body portion 91 and the abutment piece 920. The connecting piece 921 protrudes outward from the main body portion 91 in the first direction, and supports the abutment piece 920 at a position a predetermined distance away from the main body portion 91. The connecting piece 921 (connecting surface S) is configured so that the connecting portion 92 fits along the inner surface of the hood 8 (second hood 8B) when the upper end of the main body portion 91 is fixed to the side surface 601 of the fuel cell 60 and the lower end of the main body portion 91 is fixed to the frame 7 (longitudinal rib 201).

[0144] The abutting piece 920 (coupling surface S) of the coupling portion 92 has threaded holes T1, T2, and T3 into which a male screw member (a bolt Bt inserted into the bonnet 8) is screwed. The threaded holes T1, T2, and T3 of the abutting piece 920 are threaded holes for a nut (a so-called back nut) welded to the back surface of the abutting piece 920 having a tapped hole or a round hole. In this embodiment, the threaded holes T1, T2, and T3 of the abutting piece 920 are tapped holes. The abutting piece 920 of this embodiment is disposed with the coupling surface S facing outward in the first direction, and the coupling piece 921 is connected to an edge of the abutting piece 920 and extends in the first direction. The coupling portion 92 of this embodiment has coupling pieces 921 connected to one or both ends of the abutting piece 920, each extending in the first direction and coupled to the main body portion 91. As a result, the connecting portion 92 in which the connecting piece 921 is connected to both ends of the abutment piece 920 has a U-shaped cross section, and the connecting portion 92 in which the connecting piece 921 is connected to one end of the abutment piece 920 has an L-shaped cross section.

[0145] In this embodiment, of the three support frames 9 arranged in a line in the second direction on each of one side (one side) and the other side (the other side) of the first direction of the fuel cell 60, one support frame 9 on the front side has a connecting portion 92 to which only its own main body portion 91 (the support frame 9) is connected.

[0146] In contrast, of the three support frames 9 arranged side by side in the second direction on each of one side (one side) and the other side (the other side) of the fuel cell 60 in the first direction, the two rearward support frames 9 have a shared connecting portion 92. Specifically, in this embodiment, of the three support frames 9 arranged on one side (one side) of the fuel cell 60 in the first direction, the two rearward support frames 9 are connected via a horizontal beam 93 that constitutes the shared connecting portion 92 and extends in the second direction. That is, the horizontal beam 93 is disposed across the main body portions 91 of the two rearward support frames 9 and is connected to the main body portions 91 of each support frame 9. In this embodiment, two horizontal beams 93 are disposed at an interval in the third direction, across the main body portions 91 of the two rearward support frames 9 and are connected to the main body portions 91 of each support frame 9.

[0147] The horizontal crosspiece 93 has a strip-shaped abutment piece 920 extending longitudinally in the second direction and a pair of connecting pieces 921 extending from the upper and lower ends of the abutment piece 920, and has a U-shaped cross section when viewed from the second direction. The pair of connecting pieces 921 of the horizontal crosspiece 93 are connected to a plurality of support frames 9 (main bodies 91) arranged at intervals in the second direction.

[0148] A plurality of screw holes (tapped holes) T1, T2, and T3 for threadingly engaging with male thread members (bolts) Bt for fastening the bonnet 8 are arranged at intervals in the second direction in the abutment piece 920 of the horizontal crosspiece 93. That is, the horizontal crosspiece 93 includes a plurality of connecting portions 92 arranged at intervals in the longitudinal direction in accordance with the arrangement of the plurality of screw holes (tapped holes) T1, T2, and T3. This allows the horizontal crosspiece 93 to function as a connecting portion 92 for a plurality (two) of support frames 9. That is, the horizontal crosspiece 93 functions as a connecting portion 92 shared by a plurality (two) of support frames 9.

[0149] In this embodiment, on each of one side and the other side in the first direction, the multiple support frames 9 (main body portions 91) are arranged so as to face the side surface 601 of the fuel cell 60. That is, the multiple support frames 9 are arranged within the area where the fuel cell 60 is present. Accordingly, the connecting portions 92 are arranged so as to be positioned corresponding to the insertion holes SH1, SH2, SH3, which are connected portions provided in the member to be attached, among the first members 83B, 83B, the second members 84B, 84B, and the third members 85B, 85B, when the main body portions 91 are fixed to the side surface 601 of the fuel cell 60 (see FIGS. 24 and 25).

[0150] In this embodiment, the third members 85B, 85B are disposed in correspondence with the space SP between the fuel cell 60 and the protection mechanism 5, and therefore no support frame 9 overlaps with the third members 85B, 85B in the first direction. Accordingly, the work vehicle 1 of this embodiment is provided with an extension member 95 for supporting the protection mechanism 5 side ends of the first members 83B, 83B and the third members 85B, 85B, and the extension member 95 includes a connecting portion 950 connecting the protection mechanism 5 side ends of the first members 83B, 83B and the third members 85B, 85B.

[0151] Accordingly, the front ends of the first members 83B, 83B and the third members 85B, 85B are coupled to a coupling portion 92 of the support frame 9 fixed to the fuel cell 60, and the protection mechanism 5 side ends of the first members 83B, 83B and the third members 85B, 85B are coupled to a coupling portion 950 of the extension member 95. Similar to the coupling portion 92 of the support frame 9, the coupling portion 950 of the extension member 95 has a coupling surface Sa that abuts against the inner surface of the first member 83B or the third member 85B arranged in a predetermined position (fixed position), and includes screw holes T1, T3 that are arranged corresponding to the coupled portions SH1, SH3 of the first member 83B or the third member 85B.

[0152] Each of the pair of side bonnet portions 81B, 81B (first member 83B, 83B, second member 84B, 84B, and third member 85B, 85B) has, as the connected portion, insertion holes SH1, SH2, SH3 for inserting male screw members (bolts) Bt that are fixed to the connecting portion 92 of the support frame 9, and is firmly fixed by screwing the male screw members (bolts) Bt inserted into the insertion holes SH1, SH2, SH3 into the screw holes T1, T2, T3 of the connecting portion 92. That is, because the fuel cell 60 is heavy, by connecting the side hood portions 81B (first members 83B, 83B, second members 84B, 84B, third members 85B, 85B) of the second hood 8B to the fuel cell 60 via the support frame 9, as shown in Figures 28 and 29, the second hood 8B (first members 83B, 83B, second members 84B, 84B, third members 85B, 85B) is fixed to the fuel cell 60 via the support frame 9. That is, in the work vehicle 1 of this embodiment, the second hood 8B, which cannot be opened or closed, is attached firmly and stably.

[0153] 29, the first bonnet 8A is also connected to the fuel cell 60 via hinges 86, so that the first bonnet 8A can also be opened and closed, while still being firmly and stably attached. Furthermore, the fuel cell 60 is fixed to the vehicle body 2 (body frame 22) with bolts, so the fuel cell 60 is stably positioned relative to the vehicle body 2 not only due to its own weight but also due to the bolt fixation. In particular, because the bonnet 8 faces the fuel cell 60 at a close distance, even when the bonnet 8 is connected to the fuel cell 60 via the support frame 9, there is little distortion or shaking that occurs in the support frame 9 when supporting the bonnet 8, and the bonnet 8 can be stably supported.

[0154] Therefore, the bonnet 8 (first bonnet 8A and second bonnet 8B) can be attached more stably.

[0155] As described above, the third members 85B, 85B can be attached and detached by attaching and detaching the male threaded member (bolt) Bt to the support frame 9 (connecting portion 92), and in this embodiment, it is possible to switch between a state in which the gas exhaust valve 660 is accessible and a state in which it is not accessible (a state in which the gas exhaust valve 660 is covered by the third members 85B, 85B).

[0156] The above-mentioned embodiment (preferred embodiment of the present invention) is as described above, and the above-mentioned embodiment includes many inventions including the present invention, and in particular provides the inventions described in the following items.

[0157] (Item 1-1) The work vehicle (1) comprises a fuel cell (60), a bonnet (8) facing the fuel cell (60), and a support frame (9) connecting the fuel cell (60) and the bonnet (8) and supporting the bonnet (8).

[0158] According to the work vehicle 1 of item 1-1, the support frame 9 connected to the fuel cell 60, which is a heavy object, supports the hood 8, so that the hood 8 is supported in a stable state. Furthermore, because the support frame 9 is interposed between the fuel cell 60 and the hood 8, the relative positional relationship between the hood 8 and the fuel cell 60 is kept constant, even if vibrations occur during work or driving, and the distance between the hood 8 and the fuel cell 60 is maintained at a constant or approximately constant distance (the required distance).

[0159] (Item 1-2) The work vehicle (1) according to item (1-1), wherein the support frame (9) connects the fuel cell (60) and the inside of the hood (8).

[0160] According to the work vehicle 1 of item 1-2, the support frame 9 connects the fuel cell 60 to the inside of the hood 8, and therefore the support frame 9 supports the inner side of the hood 8. This allows the support frame 9 to reliably bear the load of the hood 8, and as a result, the hood 8 is stably fixed.

[0161] (Item 1-3) The work vehicle (1) according to item (1-1) or (1-2), wherein the support frame (9) is connected to a side surface (601) of the fuel cell (60).

[0162] According to the work vehicle 1 of items 1-3, the support frame 9 disposed between the fuel cell 60 and the hood 8 is connected to the side surface 601 of the fuel cell 60, thereby shortening the distance between the connection position of the fuel cell 60 to the support frame 9 and the connection position of the hood 8 to the support frame 9. This reduces the twisting and bending forces acting on the support frame 9 that supports the hood 8. Therefore, the hood 8 can be supported in a stable state.

[0163] (Items 1-4) The work vehicle (1) according to any one of items (1-3), wherein the support frames (9) are arranged on both sides of the fuel cell (60), and each extend in the vertical direction.

[0164] According to the work vehicle 1 of items 1-4, the hood 8 is supported by the support frames 9 arranged on both sides of the fuel cell 60, so that the hood 8 is stably arranged (fixed).

[0165] (Items 1-5) The work vehicle 1 according to any one of items 1-1 to 1-4 includes a vehicle body 2 on which a fuel cell 60 is mounted, and a support frame 9 that connects the fuel cell 60, the hood 8, and the vehicle body 2.

[0166] According to the work vehicle 1 of items 1-5, the support frame 9 connects the fuel cell 60, the hood 8, and the body 2, so that the fuel cell 60, the hood 8, and the body 2 are integrated through the support frame 9, making the attachment of the hood 8 stronger and more stable.

[0167] (Items 1-6) A work vehicle 1 described in items 1-5, comprising a traveling device 3 that supports the vehicle body 2 so that it can travel, and a protection mechanism 5 that protects the driver's seat DS, wherein the fuel cell 60 and the protection mechanism 5 are arranged side by side in the fore-and-aft direction on the vehicle body 2.

[0168] According to the work vehicle 1 of items 1-6, the fuel cell 60 and the protection mechanism 5 are arranged side by side in the front-rear direction on the vehicle body 2, thereby improving the weight balance in the second direction.

[0169] (Items 1-7) The work vehicle 1 is described in any one of items 1-1 to 1-6, wherein the hood 8 includes a first hood 8A that can be opened and closed and a second hood 8B that cannot be opened and closed, and the second hood 8B covers the fuel cell 60.

[0170] The work vehicle 1 of items 1-7 includes a first bonnet 8A that can be opened and closed and a second bonnet 8B that cannot be opened and closed, and the second bonnet 8B covers the fuel cell 60, so that opening and closing the first bonnet 8A makes it easier to perform maintenance on equipment covered by the first bonnet 8A (equipment other than the fuel cell 60).

[0171] (Items 1-8) The work vehicle 1 according to any one of items 1-7, wherein the support frame 9 connects the fuel cell 60 and the second hood 8B.

[0172] According to the work vehicle 1 of items 1-8, of the first bonnet 8A and second bonnet 8B that make up the bonnet 8, the second bonnet 8B that covers the fuel cell 60 is connected to the fuel cell 60 via the support frame 9. This allows the second bonnet 8B to maintain a constant positional relationship relative to the fuel cell 60 that it is protecting (covering).

[0173] (Items 1-9) The work vehicle (1) according to item (1-7) or (1-8), wherein the first hood (8A) is attached to the fuel cell (60) so as to be openable and closable.

[0174] According to the work vehicle 1 of items 1-9, the first hood 8A can be opened and closed stably because it is attached to the fuel cell 60, which is a heavy object.

[0175] (Items 1-10) The work vehicle 1 according to any one of items 1-7 to 1-9, wherein the second hood 8B is disposed in front of the protection mechanism 5, and the first hood 8A is disposed in front of the second hood 8B.

[0176] According to the work vehicle 1 of items 1-10, the openable first hood 8A is positioned in front of the protection mechanism 5 and the second hood 8B, thereby preventing the protection mechanism 5 and the second hood 8B from interfering with the opening and closing operations of the first hood 8A.

[0177] (Item 1-11) The work vehicle 1 is described in item 1-6, in which the fuel cell 60 is disposed in front of the protection mechanism 5, or in any one of items 1-7 to 1-8 which cite item 1-6.

[0178] According to the work vehicle 1 of item 1-11, the fuel cell 60, which is a heavy object, is positioned in front of the protection mechanism 5, so that the load (center of gravity) can be positioned in front of the protection mechanism 5, resulting in stable workability and driving performance.

[0179] (Items 1-12) The work vehicle 1 according to any one of items 1-1 to 1-11, wherein the support frame 9 has mounting portions 90 for mounting electronic devices or harnesses.

[0180] According to the work vehicle 1 of items 1-12, electronic devices or harnesses can be attached to the mounting portions 90 of the support frame 9, eliminating the need to provide a separate structure for attaching the electronic devices or harnesses. In other words, the support frame 9 that connects the fuel cell 60 and the hood 8 can also be used as a member for attaching the electronic devices or harnesses.

[0181] (Item 2-1) The work vehicle 1 comprises a driver's seat DS, a fuel cell 60, and an exhaust pipe 61 for discharging exhaust wastewater generated in conjunction with power generation by the fuel cell 60 to the outside, the exhaust pipe 61 being disposed between the driver's seat DS and the fuel cell 60.

[0182] According to the work vehicle 1 of item 2-1, the exhaust pipe 61 that discharges the exhaust wastewater generated in conjunction with the power generation of the fuel cell 60 to the outside is located between the driver's seat DS and the fuel cell 60, so the length of the exhaust pipe 61 is not unnecessarily long and the exhaust wastewater generated in conjunction with the power generation of the fuel cell 60 can be appropriately discharged. This prevents water or air (especially water) from accumulating inside the fuel cell 60, and the fuel cell 60 generates electricity with high efficiency.

[0183] (Item 2-2) The work vehicle 1 described in item 2-1, wherein the discharge pipe 61 has a connection end E1 connected to the fuel cell 60 and an open end E2 through which exhaust wastewater is discharged from the connection end E1, and the open end E2 is positioned lower than the connection end E1.

[0184] According to the work vehicle 1 of item 2-2, the open end E2, through which exhaust water is discharged from the connection end E1, is positioned below the connection end E1, so that the exhaust water is guided toward the open end E2. Therefore, the exhaust water is discharged properly and smoothly.

[0185] (Item 2-3) The work vehicle 1 according to item 2-2, wherein the open end E2 of the discharge pipe 61 faces downward or obliquely downward.

[0186] According to the work vehicle 1 of item 2-3, the open end E2 of the discharge pipe 61 faces downward or obliquely downward, so that exhaust air is reliably discharged.

[0187] (Item 2-4) A work vehicle 1 described in any one of items 2-1 to 2-3, comprising a body 2 that supports a driver's seat DS and a fuel cell 60, and a traveling device 3 that supports the body 2 so that it can travel, wherein the driver's seat DS and the fuel cell 60 are arranged side by side in the fore-and-aft direction on the body 2, and the terminal end 61b of the discharge pipe 61 extends diagonally downward in the width direction.

[0188] According to work vehicle 1 of item 2-4, terminal end 61b of discharge pipe 61 extends diagonally downward in the width direction, so that exhaust wastewater can be discharged outward in the width direction of vehicle body 2.

[0189] (Item 2-5) A work vehicle 1 described in items 2-4, including a windshield 50 arranged in front of a driver's seat DS, a fuel cell 60 arranged in front of the windshield 50, and an exhaust pipe 61 arranged in front of the windshield 50 and behind the fuel cell 60.

[0190] According to the work vehicle 1 of item 2-5, the discharge pipe 61 is disposed between the windshield 50 and the fuel cell 60. As a result, even if exhaust wastewater is discharged from the discharge pipe 61, the windshield 50 prevents the exhaust wastewater from flowing toward the driver's seat DS.

[0191] (Item 2-6) A work vehicle (1) according to any one of items (2-1) to (2-5), comprising a step (56) for getting on and off the driver's seat (DS), and the discharge pipe (61) being arranged in front of or behind the step (56).

[0192] According to the work vehicle 1 of item 2-6, the discharge pipe 61 is positioned in front of or behind the step 56, so that it is not positioned overlapping with the step 56, and the discharge pipe 61 is prevented from getting in the way when a worker uses the step 56 to get in and out of the driver's seat DS.

[0193] (Item 2-7) A work vehicle (1) according to any one of items (2-1) to (2-6) is provided with a power storage device (68) that stores the electric power generated by the fuel cell (60), and the discharge pipe (61) is arranged in front of or behind the power storage device (68).

[0194] According to the working device of item 2-7, the discharge pipe 61 is disposed in front of or behind the power storage device 68, so that the discharge pipe 61 is prevented from interfering with the power storage device 68.

[0195] (Item 2-8) A work vehicle 1 described in item 2-4 or item 2-5, or item 2-6 or item 2-7 which cites item 2-4 or item 2-5, wherein the terminal end 61b of the discharge pipe 61 is located above the lowest part of the vehicle body 2.

[0196] According to the work vehicle 1 of item 2-8, the terminal end 61b of the discharge pipe 61 is located above the lowest part of the vehicle body 2, so the discharge pipe 61 is prevented from coming close to the ground. In other words, even if the lowest end of the vehicle body 2 comes close to the ground, the terminal end 61b of the discharge pipe 61 is located above the lowest part of the vehicle body 2, so the terminal end 61b of the discharge pipe 61 is prevented from coming into contact with the ground and closing the open end E2. This makes it possible to prevent the discharge of exhaust water associated with power generation by the fuel cell 60 from being obstructed.

[0197] (Item 3-1) The work vehicle (1) is provided with a tank (62) for storing gas, a pipe (63) connected to the tank (62), a connection device (64) including a gas filling port (640) and connectable to the pipe (63), and a support structure (65) for supporting the connection device (64) so ​​that the position of the connection device (64) can be adjusted when the pipe (63) is not connected to the connection device (64).

[0198] According to the work vehicle 1 of item 3-1, the position of the connection device 64 can be adjusted by the support structure 65, thereby aligning the positions of the connection device 64 and the piping 63. This makes it easy to connect the connection device 64 and the piping 63 without performing complicated work.

[0199] (Item 3-2) The work vehicle (1) according to item (3-1), wherein the support structure (65) is capable of adjusting the position of the connection device (64) in a direction perpendicular to the direction in which the connection device is connected to the pipe (63).

[0200] According to the work vehicle 1 of item 3-2, even if there is a positional misalignment between the connection device 64 and the pipe 63 in a direction perpendicular to the direction of connection to the pipe 63, the positions of the connection device 64 and the pipe 63 can be aligned by adjusting the position of the connection device 64.

[0201] (Item 3-3) A work vehicle 1 described in item 3-2, in which the connection device 64 is connected to the piping 63 in a first direction perpendicular to the vertical direction, and the support structure 65 is capable of adjusting the position of the connection device 64 in at least one of the vertical direction and a second direction perpendicular to the first direction.

[0202] According to the work vehicle 1 of item 3-3, the positions of the connection device 64 and the piping 63 can be aligned simply by adjusting the position of the connection device 64 in two directions that are perpendicular to each other.

[0203] (Item 3-4) A work vehicle 1 described in item 3-2 or 3-3, which has a drivable body 2, the body 2 directly or indirectly supports a tank 62, the first direction is a width direction perpendicular to the fore-and-aft direction of the body 2, the second direction is the fore-and-aft direction of the body 2, and the support structure 65 is capable of adjusting the position of the connection device 64 in each of the up-and-down direction and the second direction.

[0204] According to the work vehicle 1 of item 3-4, by adjusting the position of the connection device 64 in the second direction, which is the fore-and-aft direction of the vehicle body 2, and in the up-and-down direction (third direction), the connection device 64 and the piping 63 can be connected in the first direction, which is the width direction perpendicular to the fore-and-aft direction of the vehicle body 2.

[0205] (Item 3-5) A work vehicle (1) according to items (3)-(4), comprising a frame (7) supporting a tank (62), wherein a support structure (65) fixes a connection device (64) to the frame (7).

[0206] According to the work vehicle 1 of items 3-5, the support structure 65 fixes the connection device 64 to the frame 7 that supports the tank 62, so the connection device 64 is stably positioned in a fixed position. This allows the gas filling operation through the gas filling port 640 to be carried out stably.

[0207] (Item 3-6) The work vehicle 1 according to items 3-5, wherein the piping 63 is arranged along the frame 7.

[0208] According to the working device of items 3-6, the piping 63 connected to the tank 62 and the connecting device 64 is arranged along the frame 7 that supports the tank 62, so that the piping 63 can be arranged along the shortest route.

[0209] (Item 3-7) The work vehicle (1) according to item (3-5) or (3-6), wherein the frame (7) is supported by the vehicle body (2).

[0210] According to the work vehicle 1 of items 3-7, the frame 7 that supports the tank 62 is supported by the vehicle body 2, so that the frame 7 and the tank 62 can be stably positioned.

[0211] (Item 3-8) The work vehicle 1 according to any one of items 3-5 to 3-7, comprising front wheels 30FR, 30FL and rear wheels 30RR, 30RL that support the vehicle body 2 so that it can travel, and the frame 7 is disposed above the rear wheels 30RR, 30RL.

[0212] According to the work vehicle 1 of items 3-8, the frame 7 is positioned above the rear wheels 30RR, 30RL, so that the weight of the tank 62 can be applied to the rear wheels 30RR, 30RL, allowing for stable driving and work.

[0213] (Item 3-9) The support structure 65 includes a fastening member 650 and a base member 651 to which the connection device 64 and the frame 7 are fastened by the fastening member 650, and the work vehicle 1 described in any one of items 3-1 to 3-8 is capable of adjusting the position of the connection device 64 by changing the relative positions of at least two of the connection device 64, the frame 7, and the base member 651.

[0214] According to the work vehicle 1 of item 3-9, the connection device 64, the frame 7, and the base member 651 can be fastened and released using the fastening member 650, and when the fastening by the fastening member 650 is released, the relative positions of at least two of the connection device 64, the frame 7, and the base member 651 can be changed.

[0215] (Item 4-1) A work vehicle (1) comprising a tank (62) for storing gas, a fuel cell (60) for generating electricity using the gas, a vehicle body (2) supporting the tank (62) and the fuel cell (60), at least one pair of wheels (30FR, 30FL, 30RR, 30RL) supporting the vehicle body (2), and a gas exhaust valve (660) for exhausting gas from the tank (62), the gas exhaust valve (660) being positioned within a range corresponding to the space between the pair of wheels (30FR, 30FL, 30RR, 30RL).

[0216] According to the work vehicle 1 of item 4-1, the work vehicle 1 is provided with a gas exhaust valve 660 for exhausting gas from the tank 62. Therefore, when the hydrogen supply pipe (supply pipe 67 in the above embodiment) is filled with pressurized gas (hydrogen in the above embodiment), the hydrogen supply source valve (on-off valve V1 in the above embodiment) provided on the tank 62 is closed and the gas exhaust valve 660 is opened, so that the gas used for power generation by the fuel cell 60 (gas usable for power generation: hydrogen in the above embodiment) as well as impure gas remaining in the hydrogen supply pipe (supply pipe 67 in the above embodiment) that inhibits power generation by the fuel cell 60 can be exhausted.

[0217] Furthermore, by repeatedly opening and closing the gas exhaust valve 660, it is possible to fill the path (supply pipe 67) between the tank 62 and the fuel cell 60 with gas of a purity required for power generation. For example, by repeatedly performing the following series of steps in the order of step (a), step (b), and step (c), it is possible to fill the path (supply pipe 67) between the tank 62 and the fuel cell 60 with gas of a purity required for power generation. Step (a): The hydrogen supply pipe (the supply pipe 67 in the above embodiment) is filled with pressurized gas (hydrogen in the above embodiment). Step (b): The hydrogen supply source valve (on-off valve V1 in the above embodiment) provided in the tank 62 is closed. Step (c): The gas exhaust valve 660 is opened. By repeating this series of steps (steps (a) to (c)), it is possible to discharge the gas used for power generation by the fuel cell 60 (gas usable for power generation: hydrogen in the above embodiment) as well as impure gases that inhibit power generation by the fuel cell 60 and remain in the hydrogen supply pipe (supply pipe 67 in the above embodiment), and the fuel cell 60 generates power in a state suitable for power generation.

[0218] Furthermore, because the gas discharge valve 660 is positioned within a range corresponding to the space between the pair of wheels 30FR, 30FL, 30RR, 30RL, it is easy to access the gas discharge valve 660 and to easily open and close the gas discharge valve 660. Therefore, according to the work vehicle 1 of item 4-1, it is possible to generate electricity in a state suitable for generating electricity without performing any complicated work.

[0219] (Item 4-2) The pair of wheels 30FR, 30FL, 30RR, 30RL includes a first wheel 30FR, rear wheel 30RR arranged on one side of the vehicle body 2 in the width direction, and a second wheel 30FL, rear wheel 30RL arranged on the other side of the vehicle body 2 in the width direction, and the gas exhaust valve 660 is arranged between the first wheel 30FR, rear wheel 30RR and the second wheel 30FL, rear wheel 30RL. A work vehicle 1 described in item 4-1.

[0220] According to the work vehicle 1 of item 4-2, the gas exhaust valve 660 is positioned between the first wheel 30FR, rear wheel 30RR and the second wheel 30FL, rear wheel 30RL, making it easy to access the gas exhaust valve 660 and to operate the gas exhaust valve 660.

[0221] (Item 4-3) A work vehicle 1 described in item 4-1, in which the pair of wheels 30FR, 30FL, 30RR, 30RL includes front wheels 30FR, 30FL arranged on the front side of the vehicle body 2 and rear wheels 30RR, 30RL arranged on the rear side of the vehicle body 2, and the gas exhaust valve 660 is arranged between the front wheels 30FR, 30FL and the rear wheels 30RR, 30RL.

[0222] According to the work vehicle 1 of item 4-3, the gas exhaust valve 660 is positioned between the front wheels 30FR, 30FL and the rear wheels 30RR, 30RL, making it easy to access the gas exhaust valve 660 and to operate the gas exhaust valve 660.

[0223] (Item 4-4) The work vehicle (1) according to any one of items (4-1) to (4-3), wherein the gas exhaust valve (660) is disposed between the tank (62) and the fuel cell (60).

[0224] According to the work vehicle 1 of item 4-4, the gas exhaust valve 660 is disposed between the tank 62 and the fuel cell 60, and is therefore disposed in a position that is easy for an operator to operate.

[0225] (Item 4-5) A work vehicle (1) according to item (4-4), wherein the tank (62) is disposed above the fuel cell (60), and the gas exhaust valve (660) is disposed below the tank (62).

[0226] According to the work vehicle 1 of item 4-5, the tank 62 is assumed to be positioned above the fuel cell 60, and the gas exhaust valve 660 is positioned below the tank 62, so that it is located in a position that is easy for the worker to operate.

[0227] (Item 4-6) The work vehicle 1 according to any one of items 4-1 to 4-5, wherein the gas exhaust valve 660 is provided in a path connecting the tank 62 and the fuel cell 60.

[0228] According to the work vehicle 1 of items 4-6, the gas exhaust valve 660 is provided in the path connecting the tank 62 and the fuel cell 60, so that gas can be exhausted from the tank 62 and the fuel cell 60 by opening the gas exhaust valve 660.

[0229] (Item 4-7) A work vehicle (1) according to any one of items 4-6, further comprising a supply pipe (67) that connects the tank (62) and the fuel cell (60) and supplies gas from the tank (62) to the fuel cell (60), and the gas exhaust valve (660) is provided on the supply pipe (67).

[0230] According to the work vehicle 1 of items 4-7, the tank 62 and the fuel cell 60 are connected to each other by a supply pipe 67 that supplies gas from the tank 62 to the fuel cell 60, and the gas exhaust valve 660 is provided on the supply pipe 67, so that gas can be exhausted from the tank 62 and the fuel cell 60 by opening the gas exhaust valve 660.

[0231] (Item 4-8) The work vehicle 1 according to any one of items 4-1 to 4-7, further comprising covers 85B, 85B that cover at least a portion of the gas discharge valve 660, the covers 85B, 85B being detachable.

[0232] According to the work vehicle 1 of items 4-8, when the covers 85B, 85B are covering at least a portion of the gas discharge valve 660, access to the gas discharge valve 660 is blocked (impeded), and therefore it is possible to prevent (block) inadvertent operation of the gas discharge valve 660. Furthermore, because the covers 85B, 85B are detachable, when necessary, the gas discharge valve 660 can be operated and gas can be discharged from the gas discharge valve 660 by removing the covers 85B, 85B.

[0233] (Item 4-9) A work vehicle (1) according to any one of items (4-1) to (4-8) includes a driver's seat (DS), and the gas exhaust valve (660) is disposed between the fuel cell (60) and the driver's seat (DS).

[0234] According to the work vehicle 1 of item 4-9, the gas discharge valve 660 is disposed between the fuel cell 60 and the driver's seat DS, so that the worker can easily access (operate) the gas discharge valve 660.

[0235] (Item 4-10) The work vehicle (1) according to any one of items (4-1) to (4-9) includes a hood (8) that houses the fuel cell (60), and the gas exhaust valve (660) is disposed inside the hood (8).

[0236] According to the work vehicle 1 of item 4-10, the gas exhaust valve 660 is disposed inside the hood 8, and therefore, it is possible to prevent (block) the gas exhaust valve 660 from being operated inadvertently.

[0237] (Item 4-11) The work vehicle 1 according to item 4-10, wherein the hood 8 includes covers 85B, 85B facing the gas exhaust valve 660, and the covers 85B, 85B are detachable.

[0238] According to the work vehicle 1 of item 4-11, when the covers 85B, 85B of the hood 8 are facing the gas discharge valve 660, it is impossible to operate the gas discharge valve 660, and therefore it is possible to prevent (block) inadvertent operation of the gas discharge valve 660. Furthermore, because the covers 85B, 85B are detachable, when necessary, the gas discharge valve 660 can be operated by removing the covers 85B, 85B, and gas can be discharged from the gas discharge valve 660.

[0239] (Item 4-12) The work vehicle 1 according to any one of items 4-1 to 4-11, wherein the gas discharge valve 660 has an external connection part 660a to which a diffusion pipe DP that releases hydrogen to the outside can be connected.

[0240] According to the work vehicle 1 of item 4-12, the gas exhaust valve 660 has an external connection part 660a to which a diffusion pipe DP can be connected to release hydrogen to the outside, and by connecting the diffusion pipe DP to the external connection part 660a, the hydrogen can be guided to an appropriate location (or device) and discharged.

[0241] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present invention.

[0242] For example, in the above embodiment, a cabin 5 is employed as the protection mechanism 5, but this is not limiting. For example, the protection mechanism 5 may be a so-called canopy that has a roof that covers the head of the worker seated in the driver's seat DS and supports that support the roof. Furthermore, the work vehicle 1 may be configured without the protection mechanism 5. Furthermore, the work vehicle 1 may be a remote-controlled or autonomously driven work vehicle 1 that does not have a driver's seat DS.

[0243] In the above embodiment, the work vehicle 1 is provided with a battery B that supplies power to the electrical equipment and a power storage device 68 that supplies power to the electric motor, but this is not limiting. For example, the work vehicle 1 may be provided with a single large battery (battery pack) as the power storage device 68 that supplies power to both the electrical equipment and the prime mover M (electric motor).

[0244] In the above embodiment, a tractor has been described as an example, but the work vehicle 1 is not limited to a tractor. For example, the work vehicle 1 may be an agricultural machine such as a combine harvester, rice transplanter, or lawnmower, or may be a construction machine such as a wheel loader, compact track loader, or skid steer loader, or may be an industrial machine such as a forklift, provided that the work vehicle 1 is equipped with a tank 62 that stores gas used for power generation (equipped with a fuel cell 60).

[0245] In the above embodiment, the support structure 65 has the first elongated through-hole H2 extending in the third direction in the base member 651 and the second elongated through-hole H3 extending in the first direction in the frame 7 (bracket 703) as through-holes for inserting the bolt 650a to change the relative positions of at least two of the connection device 64, the frame 7 (bracket 703), and the base member 651. However, this is not limited to this. For example, the support structure 65 may include, as the base member 651, a first base member that supports the connection nozzle and a second base member that supports the first base member, and may include, as the through-holes, a first elongated through-hole formed in either the connection nozzle or the first base member, and a second elongated through-hole formed in either the first base member or the second base member and extending in a direction different from the first through-hole. Even in this way, the support structure 65 allows the relative positions of at least two of the connection device 64, the frame 7 (bracket 703), and the base member 651 to be changed, making it easier to connect (align) the filling pipe 63 to the connection device 64.

[0246] In the above embodiment, the gas exhaust valve 660 is disposed between the front wheels 30FR, 30FL and the rear wheels 30RR, 30RL and between the first wheels 30FR, 30RR and the second wheels 30FL, 30RL, but is not limited to this. For example, the gas exhaust valve 660 may be disposed outside the gap between the front wheels 30FR, 30FL and the rear wheels 30RR, 30RL, and within a range corresponding to the gap between the first wheels 30FR, 30RR and the second wheels 30FL, 30RL.

[0247] 30 , for example, a gas discharge valve 660 (external connection part 660a) may be disposed in a range corresponding to between the first wheels 30FR, 30RR and the second wheels 30FL, 30RL in a housing case 75 that houses the tanks 62, or in an exterior cover 76 that covers the housing case 75, and an opening 760 for operating the gas discharge valve 660 (connecting a diffusion pipe DP to the external connection part 660a) may be provided in the housing case 75 or the exterior cover 76 that covers the housing case 75. That is, the gas discharge valve 660 may be disposed on the rear side where one mirror part 621 to which the supply pipe 67 of the tank 62 is connected is located, and the external connection part 660a may be exposed from the opening 760 on the rear wall part of the housing case 75 or the exterior cover 76 that covers the housing case 75.

[0248] In this case, if the gas discharge valve 660 is electrically operated, the gas can be discharged by connecting a diffusion pipe DP to the external connection part 660a and remotely opening the gas discharge valve 660. Furthermore, if the gas discharge valve 660 is manually operated, an opening (window) for accessing the handle H of the gas discharge valve 660 may be provided in the top part of the housing case 75 or the exterior cover 76 that houses the gas discharge valve 660, and the opening (window) may be closed with a removable cover. That is, the opening may be normally closed with a cover, and when discharging the gas from the tank 62, the cover may be removed and the gas may be discharged manually (by operating the handle H).

[0249] In this way, whether the gas exhaust valve 660 is automatic or manual, the gas exhaust valve 660 (external connection part 660a) is positioned within a range corresponding to the space between the first wheels 30FR, 30RR and the second wheels 30FL, 30RL in the first direction, thereby preventing impairment of operability of the gas exhaust valve 660 (operability of connecting the diffusion pipe DP to the external connection part 660a). [Explanation of symbols]

[0250] 1: Work vehicle 2: Body 5: Protection mechanism (cabin) 7: Frame 8: Bonnet 8A: First bonnet 8B: Second bonnet 9: Support frame 30FR: 1st wheel (front wheel: wheel) 30FL: 2nd wheel (front wheel: wheel) 30RR: 1st wheel (rear wheel: wheel) 30RL: 2nd wheel (rear wheel: wheel) 50: Windshield 56: Step 60:Fuel cell 61: Discharge pipe 61b: Termination part 62: Tank 63: Filling piping (piping) 64: Connection device 65:Support structure 67: Supply piping (piping) 68: Power storage device 85: Hinge 85B: Cover (third member) 90: Mounting part 600: Outlet 640: Gas filling port 650: Fastening members 650a: Bolt 650b: Nut 651: Base material 660: Gas exhaust valve DS: Driver's seat E1: Connection end E2: Open end H2: First insertion hole H3: 2nd insertion hole SP: Space S1: Inclination angle sensor S2: Acceleration sensor

Claims

1. a tank containing gas; a pipe connected to the tank; a connection device including a gas filling port and connectable to the piping; a support structure that supports the connection device so as to adjust the position of the connection device when the pipe is not connected to the connection device; A work vehicle equipped with:

2. The work vehicle according to claim 1 , wherein the support structure is capable of adjusting the position of the connection device in a direction perpendicular to the direction in which the connection device is connected to the pipe.

3. the connection device is connected to the piping in a first direction perpendicular to the up-down direction, The work vehicle according to claim 2 , wherein the support structure is capable of adjusting the position of the connection device in at least one of the vertical direction and a second direction perpendicular to the first direction.

4. Equipped with a drivable vehicle body, the vehicle body directly or indirectly supports the tank; the first direction is a width direction perpendicular to a front-rear direction of the vehicle body, the second direction is a front-rear direction of the vehicle body, The work vehicle according to claim 2 , wherein the support structure is capable of adjusting the position of the connection device in both the up-down direction and the second direction.

5. a frame for supporting the tank; The work vehicle of claim 4 , wherein the support structure secures the connection device to the frame.

6. The work vehicle according to claim 5 , wherein the piping is arranged along the frame.

7. The work vehicle according to claim 5 , wherein the frame is supported by the vehicle body.

8. front wheels and rear wheels that support the vehicle body so that it can run; The work vehicle according to claim 5 , wherein the frame is disposed above the rear wheels.

9. A work vehicle as described in any one of claims 1 to 8, wherein the support structure includes a fastening member and a base member to which the connection device and the frame are fastened by the fastening member, and the position of the connection device can be adjusted by changing the relative positions of at least two of the connection device, the frame, and the base member.

Images