Work vehicle

Abstract

A work vehicle comprising: a vehicle body; a fuel cell that is installed in the vehicle body; a battery unit that stores power generated by the fuel cell; a motor that is installed in the vehicle body and that is driven via the power stored in the battery unit; a machine case that is disposed above the battery unit; and a cover that covers the machine case.

Description

Work vehicles

[0001] This application claims priority to Japanese Patent Application No. 2023-219336, filed December 26, 2023, and incorporates by reference all of the contents of that application.

[0002] Patent Document 1 discloses a work vehicle equipped with a fuel cell, a battery, a motor, and a traveling device. The fuel cell uses hydrogen gas to generate electricity that is stored in the battery. The motor is rotated by the power from the battery, and the torque generated by the motor drives the traveling device.

[0003] JP 2023-013188 A

[0004] The work vehicle of the present disclosure comprises a vehicle body, a fuel cell mounted on the vehicle body, a battery unit that stores the electricity generated by the fuel cell, a motor mounted on the vehicle body and driven by the electricity stored in the battery unit, an equipment case placed on top of the battery unit, and a cover that covers the equipment case.

[0005] FIG. 1 is a perspective view showing an embodiment of a work vehicle according to the present disclosure. FIG. 2 is a front view of the work vehicle shown in FIG. 1. FIG. 3 is a rear view of the work vehicle shown in FIG. 1. FIG. 4 is a side view (right side view) of the work vehicle shown in FIG. 1. FIG. 5 is a side view (left side view) of the work vehicle shown in FIG. 1. FIG. 6 is a plan view of the work vehicle shown in FIG. 1. FIG. 7 is a bottom view of the work vehicle shown in FIG. 1. FIG. 8 is an exploded perspective view of a portion of the work vehicle shown in FIG. 1. FIG. 9 is a right side view of the work vehicle shown in FIG. 1 with the hood, front cover, and part of the tank case removed. FIG. 10 is a perspective view of the lower right front side seen from inside the cabin. FIG. 11 is a perspective view of the relay junction seen from the outside in the vehicle width direction and from the rear. FIG. 12 is a perspective view of the relay junction seen from the inside in the vehicle width direction and from the rear. FIG. 13 is a perspective view of the first junction and the second junction seen from the inside in the vehicle width direction and from the front with the covers removed. Fig. 14 is a perspective view of the first junction with the cover removed, seen from the outside and front in the vehicle width direction, Fig. 15 is a perspective view of the relay junction with the cover's opening and closing door open, seen from the outside and front in the vehicle width direction, and Fig. 16 is a perspective view of the opening and closing door shown in Fig. 11 as seen from the inside in the vehicle width direction.

[0006] <Problem to be Solved by the Present Disclosure> In the work vehicle described in Patent Document 1, for example, an equipment case may be placed on top of the battery to efficiently perform assembly and maintenance work on the electrical system. However, if mud or other debris thrown up by the traveling device adheres to the equipment case placed on the battery, there is a risk that the efficiency of work on the electrical system may actually decrease. An object of the present disclosure is to provide a work vehicle that can efficiently perform work on the electrical system.

[0007] <Effects of the Present Disclosure> According to the present disclosure, work on the electrical system of a work vehicle can be performed efficiently.

[0008] <Outline of Embodiments of the Present Disclosure> An outline of embodiments of the present disclosure will be listed and described below. (1) A work vehicle according to an embodiment includes a vehicle body, a fuel cell mounted on the vehicle body, a battery unit that stores power generated by the fuel cell, a motor mounted on the vehicle body and driven by the power stored in the battery unit, an equipment case disposed on the battery unit, and a cover that covers the equipment case.

[0009] In the above work vehicle, the equipment case placed on the battery unit is covered with a cover, which prevents mud and dirt from adhering to the equipment case, allowing for efficient work on the electrical system.

[0010] (2) The work vehicle described in (1) above preferably includes a first external terminal provided on the outside of the equipment case, and the cover preferably includes a cover main body that covers the equipment case and the first external terminal, and an opening / closing door that is provided on the cover main body and provides access to the first external terminal. In this case, the first external terminal provided on the outside of the equipment case is covered by the cover main body, thereby preventing mud and dirt from adhering to the first external terminal. Furthermore, by opening the opening / closing door provided on the cover main body, the first external terminal covered by the cover main body can be easily accessed. This allows for more efficient work on the electrical system.

[0011] (3) The work vehicle described in (1) or (2) above preferably includes the equipment case, a first junction having a first external terminal provided on the outside of the equipment case, and a second junction having a second external terminal disposed on the battery unit, and the cover preferably covers the first junction and the second junction. In this case, the first junction and the second junction disposed on the battery unit are covered by the cover, which can prevent mud and the like from adhering to the first junction and the second junction.

[0012] (4) In the work vehicle described in (3), it is preferable that the first external terminal has a first connector for inputting or outputting electric power, the second external terminal has a second connector for inputting or outputting electric power, and the first connector is disposed above the second connector. In this case, the first connector and the second connector are disposed at different positions in the vertical direction. This makes it easier to connect cables to the first connector and the second connector, respectively, and allows work on the electrical system to be performed more efficiently.

[0013] (5) In the work vehicle described in (4), it is preferable that the battery unit is disposed on the outer side of the vehicle body in the vehicle width direction, the first connector has a first connection port to which a corresponding cable is connected, the second connector has a second connection port to which a corresponding cable is connected, and the first connection port and the second connection port each open toward the inner side of the vehicle width direction. In this case, the cables connected to the first connection port of the first connector and the second connection port of the second connector, respectively, can be drawn toward the inner side of the vehicle width direction. This allows the cable wiring length to be shorter than when the cables are drawn toward the outer side of the vehicle width direction.

[0014] (6) In the work vehicle described in (5), the cover preferably has an opening on the inside in the vehicle width direction for pulling out the cables connected to the first connection port and the second connection port. In this case, the cables connected to the first connection port of the first connector and the second connection port of the second connector can be easily pulled out from the opening in the cover. This makes it possible to perform work on the electrical system more efficiently.

[0015] (7) In the work vehicle described in (5) or (6), the second junction is preferably located on the battery unit and more inward in the vehicle width direction than the first junction. In this case, the second connector of the second junction is located more inward and lower in the vehicle width direction than the first connector of the first junction. This makes it easier to connect cables to each of the first connector and the second connector, thereby making work on the electrical system more efficient.

[0016] (8) In the work vehicle described in (7), the cover preferably includes a cover main body that covers the first junction and the second junction, and an opening / closing door provided on the outer side of the cover main body in the vehicle width direction. In this case, the opening / closing door can be opened to easily access the first junction covered by the cover main body. This allows for more efficient work on the electrical system.

[0017] (9) In the work vehicle described in (8), the first external terminal preferably includes a service plug that is provided on the outer side of the device case in the vehicle width direction and that serves to interrupt the power path, and the service plug is preferably located near the opening / closing door. In this case, the service plug, which is covered by the cover body, can be easily accessed by opening the opening / closing door. As a result, the power path can be easily interrupted by the service plug.

[0018] (10) In the work vehicle described in (8) or (9), the first external terminal preferably includes a voltage detector that is provided on the outer side of the device case in the vehicle width direction and that checks whether electricity is flowing through the power path, and the voltage detector is preferably located near the opening / closing door. In this case, the voltage detector, which is covered by the cover body, can be easily accessed by opening the opening / closing door. As a result, the voltage detector can easily check whether electricity is flowing through the power path.

[0019] (11) The work vehicle described in any one of (1) to (10) above includes a driver's seat mounted on the vehicle body, a cabin with the driver's seat inside, and a traveling device with front and rear wheels, and the battery unit is preferably disposed between the front and rear wheels on the outer side of the vehicle width direction of the vehicle body, and the equipment case is disposed on top of the battery unit and in front of the cabin. In this case, since the equipment case is disposed in front of the cabin, it can be disposed on top of the battery unit without interfering with the cabin.

[0020] (12) In the work vehicle described in (11), it is preferable that the cabin has a windshield, and the cover is positioned so that it can be seen through the windshield from the driver's seat. In this case, a worker sitting in the driver's seat can easily see through the windshield of the cabin that the equipment case is covered with the cover.

[0021] (13) In the work vehicle described in (11), it is preferable that the cabin has a side window, and the cover is positioned so that it can be seen through the side window from the driver's seat. In this case, a worker sitting in the driver's seat can easily see through the side window of the cabin that the equipment case is covered with the cover.

[0022] <Details of the embodiment of the present disclosure> Preferred embodiments will now be described with reference to the drawings. [Overall configuration of the work vehicle] Fig. 1 is a perspective view showing one embodiment of a work vehicle according to the present disclosure. Figs. 2 to 7 are a front view, a rear view, a side view (right side view), a side view (left side view), a plan view, and a bottom view of the work vehicle shown in Fig. 1. The work vehicle 10 of this embodiment is a vehicle that can be used for agricultural work, and the work vehicle 10 shown in Fig. 1 is a tractor. The work vehicle is not limited to a tractor. For example, the work vehicle according to the present disclosure may be an agricultural machine, a construction machine, a utility vehicle, or the like other than a tractor.

[0023] The directions of the work vehicle 10 of the present disclosure are defined below. The direction in which the work vehicle 10 moves forward is defined as "front," the direction in which the work vehicle 10 moves backward is defined as "rear," the left side of the work vehicle 10 facing forward is defined as "left," and the right side of the work vehicle 10 facing forward is defined as "right." The front-to-rear direction of the work vehicle 10 is defined as the vehicle front-to-rear direction. The left-to-right direction perpendicular to the vehicle front-to-rear direction is defined as the vehicle width direction. The direction perpendicular to both the vehicle front-to-rear direction and the vehicle width direction is defined as the up-to-down direction. The up-to-down direction is also called the height direction. In each figure, orthogonal three-dimensional coordinates are shown, with the front direction indicated by arrow X1 and the rear direction indicated by arrow X2. The left direction is indicated by arrow Y1 and the right direction is indicated by arrow Y2. The up direction is indicated by arrow Z1 and the down direction is indicated by arrow Z2.

[0024] The work vehicle 10 shown in FIG. 1 includes a vehicle body 11, a traveling device 12 that supports the vehicle body 11 so that it can travel, a driver's seat 15, a cabin 16, a tank unit 21 having a tank 13 that stores fuel, and a drive device 14 that is powered by the fuel stored in the tank 13. The fuel is a liquid or gas, such as hydrogen, methane, or carbon monoxide (CO). In this embodiment, the tank 13 stores hydrogen gas. The work vehicle 10 of this embodiment is a fuel cell vehicle (FCV) that travels using electricity generated by a fuel cell (fuel cell module) 24 using hydrogen and oxygen. The fuel cell 24 may generate electricity using methane or carbon monoxide (CO) as fuel.

[0025] The drive device 14 has a fuel cell 24, a battery unit 30, and an electric motor 31. The battery unit 30 has a battery 300 that stores power generated by the fuel cell 24. The motor 31 is driven by the power stored in the battery 300. The work vehicle 10 is equipped with a hydrogen gas piping (hydrogen piping) 22 and a filling unit 25 (see FIG. 3 ). The filling unit 25 has a filling port (receptacle) 26 to which a filling nozzle of a hydrogen gas supply device (not shown) that is separate from the work vehicle 10 is connected. Hydrogen gas is supplied from the filling port 26 and supplied to the tank 13 through the piping 22 (rear piping 22r). The hydrogen gas in the tank 13 is supplied to the fuel cell 24 through the piping 22 (front piping 22f).

[0026] The work vehicle 10 (see FIG. 1) includes a mounting frame 17 and a support frame 37. The mounting frame 17 is a frame for mounting the tank unit 21 (tank 13) on the vehicle body 11. The support frame 37 is a frame for supporting the battery unit 30 on the vehicle body 11. The specific configurations of the mounting frame 17 and the support frame 37 will be described later. The work vehicle 10 (see FIG. 7) includes an exhaust path 35. The exhaust path 35 exhausts water or water vapor generated by power generation by the fuel cell 24 to the outside.

[0027] [Vehicle Body] The vehicle body 11 has a chassis 41, a hood 34, a front cover 111, and a fender 47. The fender 47 covers the rear wheels 122 from above. The chassis 41 supports the traveling device 12, the drive device 14, and the cabin 16. Figure 8 is an exploded perspective view of a portion of the work vehicle 10 shown in Figure 1. The chassis 41 is located at the center in the vehicle width direction and has a shape that is long in the front-to-rear direction of the vehicle. The chassis 41 has a front frame 32 that forms the front part of the chassis 41, a gear case 33 that forms the rear part of the chassis 41, and a first lateral frame 45 and a second lateral frame 46 that extend in the vehicle width direction.

[0028] The front frame 32, the first lateral frame 45, and the second lateral frame 46 are formed by combining metal frame materials or the like. The front frame 32 mounts the motor 31. The first lateral frame 45 is fixed to the front frame 32 behind the front wheels 121. The second lateral frame 46 is fixed to the front frame 32 in front of the front wheels 121. Both ends of the first lateral frame 45 and the second lateral frame 46 in the vehicle width direction extend outward in the vehicle width direction beyond the front frame 32 (see FIG. 7 ).

[0029] The gear case 33 has a metal box body. The gear case 33 is connected to the rear of the front frame 32, and the gear case 33 and the front frame 32 form the framework of the vehicle body 11. The gear case 33 has a power transmission mechanism therein, such as a transmission, a clutch, and a differential gear. The power transmission mechanism reduces or increases the rotation of the output shaft of the motor 31 and outputs the rotation to the traveling device 12 (either or both of the front wheels 121 and the rear wheels 122).

[0030] The power transmission mechanism outputs a portion of the power of the motor 31 to a PTO shaft 334 (see FIG. 3 ). The PTO shaft 334 is an output shaft provided at the rear of the gear case 33. The work vehicle 10 is equipped with a coupling device 43 for coupling another device to the rear of the vehicle body 11. The PTO shaft 334 transmits the power of the motor 31 to the other device coupled to the coupling device 43. The other device is a work device (not shown), also called an implement. The work device is operated by the power of the motor 31. An example of the work device is a tiller.

[0031] Figure 9 is a right side view of the work vehicle 10, showing the hood 34, front cover 111, and a portion of the tank case 211 of the tank unit 21 removed. Starting from the front of the vehicle, the first radiator 48, fuel cell 24, and second radiator 49 are mounted on the chassis 41 in this order. As shown in Figures 4 and 9, the hood 34 and front cover 111 cover the mounted components located near the front of the vehicle body 11. The hood 34 covers the fuel cell 24 and first radiator 48 from above and on both sides in the vehicle width direction. The front cover 111 covers the second radiator 49 located behind the fuel cell 24 from above and on both sides in the vehicle width direction.

[0032] The upper surface 48a of the first radiator 48 is lower than the upper surface 24a of the fuel cell 24. The upper surface 24a of the fuel cell 24 is lower than the upper surface 49a of the second radiator 49. The upper surface 111a of the front cover 111 is higher than the upper surface 34a of the hood 34, but lower than the upper end of the steering wheel 151 that is operated by an operator sitting in the driver's seat 15 to steer the vehicle. The upper surface 34a of the hood 34 becomes lower toward the front. This makes it less likely that the operator sitting in the driver's seat 15 will have an obstructed view.

[0033] [Driver's Seat and Cabin] The driver's seat 15 and the cabin 16 are provided on the chassis 41 at a rearward position (see FIG. 1). The cabin 16 has the driver's seat 15 and a steering wheel 151 inside. The cabin 16 has front pillars 162 located in front of the driver's seat 15, rear pillars 163 located behind the driver's seat 15, and a roof 164 located above the driver's seat 15. The front pillars 162 are provided on the left front and right front of the driver's seat 15. The rear pillars 163 are provided on the left rear and right rear of the driver's seat 15. The roof 164 is supported by the front pillars 162 and the rear pillars 163.

[0034] The cabin 16 has a transparent windshield 165 located in front of the driver's seat 15, and transparent side windows 166 located on both the left and right sides of the driver's seat 15. The windshield 165 is provided between the left and right front pillars 162. The side windows 166 are provided between the front pillars 162 and the rear pillars 163. The windshield 165 and the side windows 166 are each provided over the entire cabin 16 from the ceiling to the floor. The side windows 166 can be opened and closed, and function as doors for the operator to enter and exit the cabin 16.

[0035] A step 167 is provided on one side (left side) of the cabin 16 in the vehicle width direction (see FIG. 5). The step 167 is a member on which an operator places their feet when getting in and out of the cabin 16. A front cover 111 and a bonnet 34 are provided in front of the cabin 16. As shown in FIGS. 2 and 6, the dimensions of the front cover 111 and the bonnet 34 in the vehicle width direction are each smaller than the dimension of the cabin 16 in the vehicle width direction. The dimension of the bonnet 34 in the vehicle width direction is smaller than the dimension of the front cover 111 in the vehicle width direction.

[0036] The work vehicle 10 of this embodiment is equipped with a cabin 16, but it does not have to be equipped with the cabin 16. The work vehicle 10 may be equipped with a canopy or ropes instead of the cabin 16. If the work vehicle 10 does not have a cabin 16, the tank unit 21 is mounted on the mounting frame 17 and positioned above the driver's seat 15.

[0037] [Traveling device 12] The traveling device 12 has front wheels 121 and rear wheels 122 (see FIG. 6). The front wheels 121 are provided on the left and right sides of the front part of the vehicle body 11. The rear wheels 122 are provided on the left and right sides of the rear part of the vehicle body 11. The maximum dimension in the vehicle width direction of the left and right rear wheels 122 is greater than the maximum dimension in the vehicle width direction of the left and right front wheels 121. The maximum dimension in the vehicle width direction of the left and right rear wheels 122 is the maximum vehicle width dimension of the work vehicle 10. One or both of the front wheels 121 and the rear wheels 122 rotate by the power of the motor 31. One or both of the front wheels 121 and the rear wheels 122 (drive wheels) that rotate by the power of the motor 31 may be crawlers (crawlers).

[0038] [Drive Device] As described above, the drive device 14 is configured to include the fuel cell 24, the battery unit 30, and the motor 31. The fuel cell 24 is located on the chassis 41 near the front of the vehicle body 11 (see FIG. 9). The motor 31 is located behind the fuel cell 24 (see FIG. 8). The battery unit 30 is disposed on the outer side of the vehicle body 11 in the vehicle width direction, between the front wheels 121 and the rear wheels 122 (see FIG. 1). The rear of the battery unit 30 is disposed below the cabin 16, and the front of the battery unit 30 is disposed in front of the cabin 16.

[0039] The fuel cell 24 generates electricity using hydrogen gas supplied from the battery unit 30 as fuel, and obtains the power to rotate the motor 31. The fuel cell 24 has a battery casing 241 in the shape of a substantially rectangular box, and a fuel cell stack 242 provided inside the battery casing 241. The fuel cell stack 242 has multiple battery cells. Each battery cell has a positive electrode and a negative electrode. The multiple battery cells are stacked. The power generated by each battery cell is collected and output to the battery unit 30.

[0040] The motor 31 has a rotating rotor and a stator with multiple coils. The output shaft of the motor 31 is connected to a power transmission mechanism in a gear case 33 (see FIG. 8). The motor 31 is located behind the fuel cell 24 and below the second radiator 49.

[0041] The battery unit 30 is mounted on a support frame 37 attached to the chassis 41 (see FIGS. 7 and 8 ). The support frame 37 is a frame structure located between the front wheels 121 and the rear wheels 122. In this embodiment, the support frame 37 has a plurality of fixed frame portions 38 extending outward in the vehicle width direction from the chassis 41, and a plurality of connecting frame portions 39 extending in the vehicle front-rear direction and connecting the plurality of fixed frame portions 38.

[0042] The inner end of each fixing frame portion 38 in the vehicle width direction is fixed to the gear case 33. The multiple connecting frame portions 39 connect the outer end, middle portion, and inner end of the multiple fixing frame portions 38 in the vehicle width direction, respectively. The upper surface of each fixing frame portion 38 between two connecting frame portions 39 arranged at the outer end and middle portion in the vehicle width direction is a mounting surface 38a on which the battery unit 30 is placed. By placing the battery unit 30 on the mounting surface 38a of each fixing frame portion 38, it is positioned on the outer side of the vehicle body 11 in the vehicle width direction.

[0043] [Tank Unit] The tank unit 21 (see FIG. 9 ) includes the tank 13, a tank case 211 that houses the tank 13, and a valve unit 212. The tank 13 is a substantially cylindrical high-pressure container. The tank 13 is made of fiber-reinforced resin reinforced with carbon fiber or glass fiber, or the like. In this embodiment, three tanks 13 are fixed to the tank case 211 with the axial direction of their cylindrical portions parallel to the vehicle width direction. The number of tanks 13 is not limited to three.

[0044] The tank case 211 is a box that can accommodate one or more tanks 13. The tank case 211 has an opening / closing door 213 (see FIG. 1 ) on one or both sides in the vehicle width direction, and is open in the vehicle width direction. The tank case 211 is installed above the roof 164 with a gap between it and the roof 164 in the vertical direction. The tank case 211 is fixed to the upper frame portion 171 of the mounting frame 17. The tank case 211 is made of metal such as aluminum or steel, and protects the tank 13 from external thermal and physical influences.

[0045] The tank 13 is located above the cabin 16 (driver's seat 15). This allows for a high degree of freedom in the placement of the fuel cell 24, filling section 25, motor 31, and battery unit 30 in the vehicle body 11. When a conventional work vehicle with an internal combustion engine is modified to have a work vehicle 10 equipped with a fuel cell 24 and motor 31 as in this embodiment, there is no need to significantly change the placement and configuration of the various devices.

[0046] The tank 13 is connected to a rear pipe 22r and a front pipe 22f via a valve unit 212 (see FIG. 9). The rear pipe 22r (see FIG. 3) is a gas inlet pipe connecting the hydrogen gas fill port 26 and the valve unit 212, and guides hydrogen gas introduced into the fill port 26 to the tank 13. The front pipe 22f (see FIG. 2) is a gas outlet pipe connecting the fuel cell 24 and the valve unit 212, and guides hydrogen gas stored in the tank 13 to the fuel cell 24. The tank 13 stores hydrogen gas introduced into the fill port 26 from outside the vehicle and supplies it to the fuel cell 24. The valve unit 212 has an on-off valve, a pressure reducing valve, etc., and adjusts the hydrogen gas stored in the tank 13 to a predetermined flow rate and guides it to the fuel cell 24 through the front pipe 22f.

[0047] 1 and 8 , the mounting frame 17 is a frame structure for mounting the tank 13 on the vehicle body 11. The mounting frame 17 in this embodiment has an upper frame portion 171, a pair of front frame portions 172, a rear frame portion 173, and a pair of reinforcing frame portions 175. The upper frame portion 171 is formed in a rectangular frame shape and is located above the cabin 16. A tank case 211 is attached to the upper frame portion 171. In other words, the upper frame portion 171 supports the tank 13 via the tank case 211. The upper frame portion 171 is supported by the front frame portion 172, the rear frame portion 173, and the reinforcing frame portion 175.

[0048] The pair of front frame portions 172 extend in the vertical direction in front of the cabin 16 and on the outer sides of the vehicle body 11 in the vehicle width direction. The upper ends of the pair of front frame portions 172 are fixed to the front left and right corners of the upper frame portion 171, respectively. The lower ends of the pair of front frame portions 172 are fixed to both ends of the first horizontal frame 45 of the chassis 41 in the vehicle width direction, respectively. The rear frame portion 173 is located behind the cabin 16. The rear frame portion 173 is configured in a lattice shape by a plurality of frame members. The upper ends of the rear frame portion 173 are fixed to the rear left and right corners of the upper frame portion 171, respectively. The lower end of the rear frame portion 173 is fixed to the chassis 41. A filling portion 25 is provided in the rear frame portion 173 (see FIG. 3 ).

[0049] The pair of reinforcing frame portions 175 are reinforcing members that absorb the inertial force that causes the upper frame portion 171 and the tank case 211 to move forward when the work vehicle 10 stops while in motion. The pair of reinforcing frame portions 175 are located in front of the front frame portion 172 and on both sides of the hood 34 in the vehicle width direction. The upper ends of the pair of reinforcing frame portions 175 are fixed to the left and right corners on the front side of the upper frame portion 171, respectively. The lower ends of the pair of reinforcing frame portions 175 are fixed to both ends of the second horizontal frame 46 of the chassis 41 in the vehicle width direction, respectively (see FIG. 2).

[0050] [Inverter and Voltage Converter] The work vehicle 10 (see FIG. 5 ) is equipped with an inverter 81, a first voltage converter 82, and a second voltage converter 83. The inverter 81 is located near the inside of the left rear wheel 122 in the vehicle width direction. The inverter 81 is attached to the chassis 41.

[0051] The first voltage converter 82 and the second voltage converter 83 are located inside the inverter 81 in the vehicle width direction and outside the chassis 41 in the vehicle width direction. The first voltage converter 82 and the second voltage converter 83 are attached to the chassis 41 in a vertically aligned state. In this embodiment, the first voltage converter 82 is located on the top and the second voltage converter 83 is located on the bottom. The first voltage converter 82 is, for example, a 12V DC / DC converter. The second voltage converter 83 is, for example, a 24V DC / DC converter.

[0052] [Radiator] The work vehicle 10 (see FIGS. 4 and 5) is equipped with a cooling system that uses coolant to cool the fuel cell 24, motor 31, inverter 81, voltage converters 82, 83, etc. As part of the cooling system, the work vehicle 10 is equipped with a first radiator 48 and a second radiator 49. As shown in FIG. 9, the first radiator 48 is located in front of the fuel cell 24, and the second radiator 49 is located behind the fuel cell 24.

[0053] The first radiator 48 is a radiator for cooling devices other than the fuel cell 24. The second radiator 49 is a radiator for cooling the fuel cell 24. The first radiator 48 is connected to electrical components (heat-generating components) that require cooling, such as the motor 31, the inverter 81, and the voltage converters 82 and 83, via a first cooling flow path (not shown) having a circulation pump. The first radiator 48 cools the coolant supplied through the first cooling flow path by heat exchange with external air. The second radiator 49 is connected to the fuel cell 24 via a second cooling flow path (not shown) having a circulation pump. The second radiator 49 cools the coolant supplied through the second cooling flow path by heat exchange with external air.

[0054] The first radiator 48 has a first fan 481. The second radiator 49 has a second fan 491. The first fan 481 and the second fan 491 rotate to pass air through the first radiator 48 and the second radiator 49, facilitating heat exchange with the coolant.

[0055] [Battery Unit] The battery unit 30 stores power to be supplied to the motor 31. The battery unit 30 (see FIG. 9) has a battery (battery pack) 300 and a battery housing 301 that houses the battery 300. The battery 300 temporarily stores power generated by the fuel cell 24 and outputs the stored power to electrical devices such as the motor 31. The battery 300 is composed of multiple battery cells. The battery 300 is a charge-discharge type secondary battery such as a lithium-ion battery or a lead-acid battery. The battery housing 301 has a rectangular parallelepiped shape that is elongated in the vehicle width direction. The lower surface of the battery housing 301 is placed on and fixed to the mounting surface 38a (see FIG. 8) of the support frame 37.

[0056] [Electrical System] The work vehicle 10 (see FIG. 9) is equipped with a relay junction 50. The relay junction 50 is an electrical connection box for relaying and distributing the power output from the battery unit 30. The fuel cell 24 is connected to an inverter 81 (see FIG. 5) via a boost circuit (not shown). The battery unit 30 is connected to the inverter 81 through the relay junction 50. The inverter 81 is electrically connected to the motor 31. The inverter 81 converts the DC power output from the boost circuit into three-phase AC power and outputs the three-phase AC power to the motor 31.

[0057] The battery unit 30 is connected to a first voltage converter 82 and a second voltage converter 83 via a relay junction 50. The first voltage converter 82 and the second voltage converter 83 form a step-down circuit that steps down the power input from the battery unit 30.

[0058] The work vehicle 10 is equipped with low-voltage electrical equipment that operates at a lower voltage than the motor 31. In this embodiment, the low-voltage electrical equipment includes radiators 48, 49 and an air conditioning system (not shown). The low-voltage electrical equipment is supplied with power that has been stepped down by a step-down circuit (voltage converters 82, 83 or a 12V battery) via a relay junction 50.

[0059] [Relay Junction] The relay junction 50 (see Figures 1, 4, and 6) is disposed above the battery unit 30 (see Figure 4). The battery unit 30, mounted on the support frame 37 as described above, is disposed on the right side of the vehicle body 11, between the first horizontal frame 45 (front frame portion 172) and the rear wheel 122. A portion of the battery unit 30 is disposed so as to be recessed below and to the right of the cabin 16. The other portion of the battery unit 30 protrudes to the right of the cabin 16 (see Figure 6) and protrudes forward of the cabin 16 (see Figure 4).

[0060] The relay junction 50 is placed on the front side above the battery unit 30 so as not to protrude forward or on either side of the battery unit 30 in the vehicle width direction. In this embodiment, the relay junction 50 is located on the front side above the battery unit 30, in front of the cabin 16 and behind the front frame portion 172. In this embodiment, the relay junction 50 is also located to the rear right of the hood 34 and on the lower right side of the front cover 111.

[0061] 10 is a perspective view of the lower right front side from inside the cabin 16. As shown in FIG. 10 , the relay junction 50 is placed on the battery unit 30, forward of the windshield 165, and protrudes to the right of the right side window 166. The lower right end of the windshield 165, where the relay junction 50 is located, reaches to the bottom 168 of the cabin 16 or a position close to the bottom 168. The lower front end of the right side window 166, where the relay junction 50 is located, reaches to the bottom 168 of the cabin 16 or a position close to the bottom 168. As a result, the relay junction 50 (particularly the cover 70, described below) is positioned so that it can be seen from the driver's seat 15 inside the cabin 16 through the windshield 165 and the side window 166.

[0062] The front cover 111 (see FIGS. 1, 4, and 6) is disposed on a pair of front frame portions 172 in front of the windshield 165 of the cabin 16. In a side view, the front cover 111 is disposed at a height midway up and down the front frame portions 172. The lower right end of the front cover 111 is disposed above the relay junction 50. In other words, the relay junction 50 is disposed between the front cover 111 and the battery unit 30 in the up-down direction in a right side view.

[0063] The hood 34 is disposed on the vehicle body 11 in front of the front cover 111. The right rear end of the hood 34 is disposed in front of the intermediate junction 50. In other words, the intermediate junction 50 is disposed between the windshield 165 of the cabin 16 and the hood 34 in the fore-and-aft direction of the vehicle as viewed from the right side.

[0064] Fig. 11 is a perspective view of the intermediate junction 50 as seen from the outside in the vehicle width direction and from behind. Fig. 12 is a perspective view of the intermediate junction 50 as seen from the inside in the vehicle width direction and from behind. As shown in Figs. 11 and 12 , the intermediate junction 50 includes a first junction 51, a second junction 56, and a cover 70. The cover 70 covers the first junction 51 and the second junction 56.

[0065] [First Junction] Figure 13 is a perspective view of the first junction 51 and the second junction 56, as seen from the inside in the vehicle width direction and from the front, with the cover 70 removed. Figure 14 is a perspective view of the first junction 51, as seen from the outside in the vehicle width direction and from the front, with the cover 70 removed. As shown in Figures 13 and 14 , the first junction 51 has an equipment case 52 that houses equipment (not shown), and a plurality of first external terminals 53 provided on the outside of the equipment case 52.

[0066] The component case 52 is disposed above the battery housing 301 and in front of the cabin 16 (see FIG. 1 ). In this embodiment, the component case 52 is fixed to the upper surface 302 of the battery housing 301, positioned in front of the upper surface 302 and in the center in the vehicle width direction. The component case 52 has a rectangular parallelepiped shape that is elongated in the vehicle width direction. The internal space of the component case 52 is in communication with the internal space of the battery housing 301.

[0067] The first external terminals 53 include two first connectors 531, 532 for inputting or outputting electric power, a service plug 533, and a voltage detector 534. In this embodiment, the first external terminals 53 include two first connectors: a fuel cell connector 531 and an inverter connector 532. The fuel cell connector 531 and the inverter connector 532 are provided on the upper side of the device case 52. The service plug 533 and the voltage detector 534 are provided on the outer side of the device case 52 in the vehicle width direction.

[0068] The fuel cell connector 531 is a connector into which the power generated by the fuel cell 24 is input. The fuel cell connector 531 is fixed to the top surface 52a of the device case 52. The fuel cell connector 531 has a connection port (first connection port) 531a to which one end of a cable 85 is connected. The connection port 531a opens toward the inside in the vehicle width direction. The other end of the cable 85 is connected to the fuel cell 24.

[0069] The inverter connector 532 is a connector that outputs power to the inverter 81. The inverter connector 532 is approximately the same size as the fuel cell connector 531. The inverter connector 532 is fixed to the upper surface 52a of the device case 52. The inverter connector 532 has a connection port (first connection port) 532a to which one end of a cable 86 is connected. The connection port 532a opens toward the inside in the vehicle width direction. The other end of the cable 86 is connected to the inverter 81.

[0070] The fuel cell connector 531 is disposed behind the upper surface 52a of the equipment case 52. The inverter connector 532 is disposed in front of the fuel cell connector 531 on the upper surface 52a of the equipment case 52. In other words, the fuel cell connector 531 and the inverter connector 532 are disposed offset in the front-to-rear direction of the vehicle on the upper surface 52a of the equipment case 52. The fuel cell connector 531 and the inverter connector 532, which are first connectors, are disposed on the upper surface 52a of the equipment case 52, and therefore are disposed above the low-voltage connector 571 and the high-voltage connector 572, which are second connectors described below.

[0071] The first junction 51 further includes a support base 54 fixed to the upper surface 52a of the device case 52, and a pair of clips 55 provided on the support base 54. The support base 54 is disposed inward in the vehicle width direction relative to the fuel cell connector 531 and the inverter connector 532. The support base 54 extends in the front-to-rear direction of the vehicle. The pair of clips 55 are fixed to the upper side of the support base 54 with a gap between them in the front-to-rear direction of the vehicle.

[0072] One clip 55 is configured to fasten the outer periphery of a cable 85 connected to the fuel cell connector 531. The other clip 55 is configured to fasten the outer periphery of a cable 86 connected to the inverter connector 532. As a result, the cables 85, 86 connected to the respective connectors 531, 532 are fixed to the device case 52 via the pair of clips 55 and the support base 54.

[0073] The service plug 533 is provided on the outer side surface 52b of the equipment case 52 in the vehicle width direction so as to be positioned near the opening / closing door 72 (see FIG. 11 ), which will be described later. The service plug 533 has a base 533a and a plug 533b detachably attached to the base 533a. The base 533a is disposed within the equipment case 52 and fixed to the inner surface of the equipment case 52 (the surface opposite the side surface 52b). When attached to the base 533a, the plug 533b is exposed outward in the vehicle width direction beyond the side surface 52b of the equipment case 52.

[0074] A portion of the power path (wiring) connected to the battery unit 30 is provided so as to pass through the base 533a and the plug 533b of the service plug 533. When the plug 533b is removed from the base 533a, the power path is physically cut off. This allows an operator to safely perform maintenance work by removing the plug 533b from the base 533a to cut off the power path.

[0075] The voltage detector 534 is provided on the side surface 52b of the equipment case 52 so as to be disposed near the opening / closing door 72 (see FIG. 11 ), which will be described later. The voltage detector 534 is disposed on the side surface 52b of the equipment case 52, in front of the service plug 533. The voltage detector 534 checks whether electricity is flowing through the power path, for example, when the service plug 533 cuts off or energizes the power path. The voltage detector 534 of this embodiment has a pair of terminals 534a for measuring voltage. Each terminal 534a is exposed outward in the vehicle width direction from the side surface 52b of the equipment case 52.

[0076] [Second Junction] The second junction 56 is disposed on the inside of the first junction 51 in the vehicle width direction. The second junction 56 has a plurality of second external terminals 57 disposed on the battery unit 30. The plurality of second external terminals 57 include two second connectors 571, 572 to which power is output, and an electrical component connector 573. In this embodiment, the plurality of second external terminals 57 include two second connectors: a low-voltage connector 571 and a high-voltage connector 572.

[0077] The low-voltage connector 571 is a connector that outputs power to the first voltage converter 82. The low-voltage connector 571 is smaller than the fuel cell connector 531 and the inverter connector 532. The low-voltage connector 571 is fixed to the top surface 302 of the battery casing 301. The low-voltage connector 571 has a connection port (second connection port) 571a to which one end of the cable 87 is connected. The connection port 571a opens toward the inside in the vehicle width direction. The other end of the cable 87 is connected to the first voltage converter 82.

[0078] The high-voltage connector 572 is a connector that outputs power to the second voltage converter 83. The high-voltage connector 572 is the same size as the low-voltage connector 571. The high-voltage connector 572 is fixed to the top surface 302 of the battery housing 301. The high-voltage connector 572 has a connection port (second connection port) 572a to which one end of the cable 88 is connected. The connection port 572a opens toward the inside in the vehicle width direction. The other end of the cable 88 is connected to the second voltage converter 83.

[0079] The low-voltage connector 571 is disposed behind the high-voltage connector 572 on the top surface 302 of the battery casing 301. In other words, the low-voltage connector 571 and the high-voltage connector 572 are disposed offset in the vertical direction on the top surface 302 of the battery casing 301.

[0080] The electrical equipment connector 573 is a connector that outputs power to low-voltage electrical equipment. The electrical equipment connector 573 is fixed to the top surface 302 of the battery casing 301. The electrical equipment connector 573 is arranged in front of the high-voltage connector 572 on the top surface 302 of the battery casing 301. The electrical equipment connector 573 has a connection port 573a to which one end of a power line (not shown) is connected. The connection port 573a opens toward the rear. The other end of the power line is connected to the low-voltage electrical equipment.

[0081] The second junction 56 further includes a support base 58 fixed to the upper surface 302 of the battery housing 301, and a plurality of (three in this example) clips 59 provided on the support base 58. The support base 58 is disposed inward in the vehicle width direction relative to the low-voltage connector 571, the high-voltage connector 572, and the electrical equipment connector 573. The support base 58 extends in the front-to-rear direction of the vehicle. The plurality of clips 59 are fixed at intervals in the front-to-rear direction of the vehicle on the upper side of the support base 58.

[0082] One clip 59 is configured to fasten the outer periphery of cable 87 connected to low-voltage connector 571. Another clip 59 is configured to fasten the outer periphery of cable 88 connected to high-voltage connector 572. The remaining clip 59 is configured to fasten the outer periphery of power line connected to electrical equipment connector 573. In this way, cables 87, 88 and power lines connected to each of connectors 571, 572, 573 are fixed to battery housing 301 via the multiple clips 59 and support bases 58.

[0083] 11 and 12 , the cover 70 has a cover body 71 and an opening / closing door 72 provided on the cover body 71. The cover body 71 is formed to cover the device case 52 and all of the first external terminals 53 of the first junction 51, and all of the second external terminals 57 of the second junction 56. An opening 715 is formed on the inside of the cover body 71 in the vehicle width direction. The cables 85 to 88 and power lines connected to the connection ports 531 a, 532 a, 571 a, 572 a, and 573 a of the connectors 531, 532, 571, 572, and 573, respectively, are drawn out from the opening 715 in the cover body 71 toward the vehicle body 11.

[0084] The cover body 71 is formed in a generally trapezoidal shape when viewed from the side in the vehicle width direction. The cover body 71 has a front wall 711, a rear wall 712, an upper wall 713, and side walls 714. The front wall 711 is located slightly forward of the front surface 303 of the battery housing 301 and extends in the vehicle width direction. A lower portion 711a of the front wall 711 is located opposite an upper portion of the front surface 303 of the battery housing 301. An upper portion 711b of the front wall 711 is inclined upward and gradually toward the rear.

[0085] The rear wall 712 is disposed behind the device case 52 and extends in the vehicle width direction. An upper portion 712b of the rear wall 712 is inclined upward and gradually toward the front. The upper wall 713 is disposed above the fuel cell connector 531 and the inverter connector 532 and extends in the vehicle width direction. Both ends of the upper wall 713 in the vehicle front-rear direction are connected to the upper ends of the front wall 711 and the rear wall 712.

[0086] Figure 15 is a perspective view of the relay junction 50 seen from the outside in the vehicle width direction and from the front, with the opening / closing door 72 of the cover 70 open. The opening / closing door 72 is not shown in Figure 15. As shown in Figure 15, the side wall 714 of the cover main body 71 is located outside the service plug 533 and the voltage detector 534 in the vehicle width direction and extends in the front-to-rear direction of the vehicle. The height dimension of the side wall 714 is smaller than the height dimensions of the front wall 711 and the rear wall 712.

[0087] In this embodiment, the height of the side wall 714 is set to a dimension that allows access to the service plug 533 and the voltage detector 534 from the outside of the side wall 714 in the vehicle width direction. Both end edges of the side wall 714 in the vehicle front-rear direction are connected to the outer lower edges of the front wall 711 and the rear wall 712 in the vehicle width direction. As a result, an opening 716 is also formed on the outside of the cover body 71 in the vehicle width direction. This opening 716 is covered by the opening / closing door 72.

[0088] 11 , 12 , and 15 , the cover 70 further includes a first seal member 73 and a second seal member 74. The first seal member 73 is made of resin or rubber and is provided on the outer side of the cover main body 71 in the vehicle width direction. The first seal member 73 is fixed along the outer edges of the front wall 711, the rear wall 712, and the top wall 713 in the vehicle width direction, and along the upper edge of the side wall 714. When the opening / closing door 72 is closed relative to the cover main body 71, the opening / closing door 72 comes into close contact with the first seal member 73. This allows the first seal member 73 to seal between the cover main body 71 and the opening / closing door 72.

[0089] The second seal member 74 is made of resin or rubber and is provided below the cover body 71. The second seal member 74 is fixed along the lower edges of the rear wall 712 and the side wall 714. The lower end of the second seal member 74 is in close contact with the upper surface 302 of the battery housing 301. In this way, the second seal member 74 seals between the cover body 71 and the battery housing 301.

[0090] [Openable / Closed Door] Figure 16 is a perspective view of the openable / closed door 72 shown in Figure 11 as seen from the inside in the vehicle width direction. In Figures 11, 15, and 16, the openable / closed door 72 is provided on the outside of the cover body 71 in the vehicle width direction. The openable / closed door 72 includes a door body 721 and a plurality of flange plates 722, 723, 724, 725, and 726 provided on the door body 721. The door body 721 is a flat plate member formed in a substantially trapezoidal shape similar to the shape of the cover body 71 in a side view. The door body 721 is formed to a size sufficient to cover the opening 716 of the cover body 71 from the outside in the vehicle width direction. A first seal member 73 is adapted to be in close contact with an inner surface 721a on the inside in the vehicle width direction of the door body 721.

[0091] The flange plates 722 and 723 protrude inward in the vehicle width direction from the front edge of the door main body 721. The flange plates 724 and 725 protrude inward in the vehicle width direction from the rear edge of the door main body 721. The flange plate 726 protrudes inward in the vehicle width direction from the upper edge of the door main body 721. These flange plates 722 to 726 cover the outer sides in the vehicle width direction of the outer surfaces of the front wall 711, rear wall 712, and upper wall 713 of the cover main body 71 in the state shown in Figure 11.

[0092] The flange plate 722 is supported by the front wall 711 of the cover body 71 via a pair of hinges 61 so as to be rotatable about a vertical axis. As a result, the opening / closing door 72 is supported so as to open and close the opening 716 relative to the cover body 71. When performing maintenance work or the like, an operator can open the opening / closing door 72 to access the service plug 533 and the voltage detector 534 from the outside of the cover body 71 in the vehicle width direction.

[0093] The cover 70 further has an operation mechanism 75 that allows an operator to open and close the opening / closing door 72. The operation mechanism 75 includes a frame 751 provided on the rear side of the door main body 721 and a handle 752 that is rotatable relative to the frame 751. The frame 751 is formed in a rectangular frame shape and is disposed so as to penetrate the door main body 721 in the vehicle width direction. The handle 752 is formed in a rectangular plate shape. The handle 752 is disposed within the frame 751 and is exposed to the outside in the vehicle width direction. An operator can open and close the opening / closing door 72 relative to the frame 751 by hooking their fingers on the handle 752.

[0094] The cover 70 further includes a locking mechanism 76 that locks the openable door 72 in a closed state relative to the cover body 71. The locking mechanism 76 includes a pair of hooks 761 provided on the operating mechanism 75 and a locking portion 762 provided on the cover body 71. The pair of hooks 761 are provided integrally with the handle 752 on the back side of the handle 752 (inside in the vehicle width direction) and spaced apart from each other in the vertical direction. The pair of hooks 761 protrude inward in the vehicle width direction from the inner surface 721a of the door body 721. The pair of hooks 761 are rotatable relative to the frame body 751 together with the handle 752.

[0095] The locking portion 762 is disposed within the cover body 71. The locking portion 762 has a bracket 762a fixed to the rear wall 712 and a shaft 762b fixed to the bracket 762a. The shaft 762b extends in the vertical direction at a position facing the pair of hooks 761, and both ends of the shaft 762b in the vertical direction are fixed to the bracket 762a. The pair of hooks 761 engage with the shaft 762b, thereby locking the opening / closing door 72 in the closed position. From this state, an operator can rotate the pair of hooks 761 together with the handle 752 to release the engagement between the pair of hooks 761 and the shaft 762b. This releases the lock on the opening / closing door 72 by the operating mechanism 75.

[0096] According to the work vehicle 10 of the present embodiment, the first junction 51 (device case 52, first external terminal 53) and the second junction 56 (second external terminal 57) arranged on the battery unit 30 are covered with the cover 70, which can prevent mud and the like from adhering to the first junction 51 and the second junction 56. This allows the worker to work on the electrical system efficiently.

[0097] The cover 70 has an opening / closing door 72 that allows access to the service plug 533 and voltage detector 534 covered by the cover body 71. This allows easy access to the service plug 533 and voltage detector 534 by opening the opening / closing door 72, making work on the electrical system more efficient. Specifically, the service plug 533 can easily cut off the power path. In addition, the voltage detector 534 can easily check whether the power path is energized.

[0098] The first connectors 531, 532 of the first external terminal 53 and the second connectors 571, 572 of the second external terminal 67 are arranged at different positions in the up-down direction from each other. This makes it easier to connect the cables 85 to 88 to the first connectors 531, 532 and the second connectors 571, 572, respectively, and therefore allows work on the electrical system to be performed more efficiently.

[0099] The first connection ports 531a, 532a of the first connectors 531, 532 and the second connection ports 571a, 572a of the second connectors 571, 572 are each open toward the inside in the vehicle width direction. This allows the cables 85-88 connected to the first connection ports 531a, 532a and the second connection ports 571a, 572a, respectively, to be drawn toward the inside in the vehicle width direction. As a result, the wiring length of each cable 85-88 can be shortened compared to when the cables 85-88 are drawn toward the outside in the vehicle width direction.

[0100] Since the cover 70 has an opening 715 on the inside in the vehicle width direction, the cables 85 to 88 connected to the connectors 531, 532, 571, and 572 can be easily pulled out from the opening 715 of the cover 70. This allows work on the electrical system to be performed more efficiently.

[0101] The second connectors 571, 572, which are located in lower positions, are located inward and lower in the vehicle width direction than the first connectors 531, 532, which are located in higher positions. This makes it easier to connect the cables 85 to 88 to the first connectors 531, 532 and the second connectors 571, 572, respectively, and therefore allows work on the electrical system to be performed more efficiently.

[0102] The equipment case 52 is disposed above the battery unit 30 in front of the cabin 16. This allows the equipment case 52 to be disposed above the battery unit 30 without interfering with the cabin 16.

[0103] The cover 70 is disposed in a position that can be seen from the driver's seat 15 inside the cabin 16 through the windshield 165 and through the side windows 166. This allows an operator sitting in the driver's seat 15 to easily see through the windshield 165 of the cabin 16 that the first junction 51 and the second junction 56 are covered with the cover 70.

[0104] [Others] The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is not limited to the above-described embodiments, but is defined by the claims, and includes all modifications within the meaning and scope equivalent to the configurations described in the claims.

[0105] For example, the relay junction 50 may be disposed at a position other than that described in the above embodiment, provided that it is located above the battery unit 30. The cover 70 of the relay junction 50 only needs to cover at least the device case 52. The voltage detector 534 of the first junction 51 may be, in addition to the above embodiment, a display panel that displays a measured voltage value. The second connector of the second junction 56 is not limited to the low-voltage connector 571 and the high-voltage connector 572, and may be, for example, a connector to which power is input. The first external terminal 53 of the first junction 51 and the second external terminal 57 of the second junction 56 may be disposed at a position other than that described in the above embodiment.

[0106] REFERENCE SIGNS LIST 10 Work vehicle 11 Vehicle body 12 Traveling device 13 Tank 14 Drive device 15 Driver's seat 16 Cabin 17 Mounting frame 21 Tank unit 22 Piping 22f Front piping 22r Rear piping 24 Fuel cell 24a Top surface 25 Filling section 26 Filling port 30 Battery unit 31 Motor 32 Front frame 33 Gear case 34 Bonnet 34a Top surface 35 Discharge path 37 Support frame 38 Fixed frame section 38a Placement surface 39 Connecting frame section 41 Chassis 43 Connecting device 45 First horizontal frame 46 Second horizontal frame 47 Fender 48 First radiator 48a Top surface 49 Second radiator 49a Top surface 50 Relay junction 51 First junction 52 Equipment case 52a Top surface 52b Side surface 53 First external terminal 54 Support base 55 Clip 56 Second junction 57 Second external terminal 58 Support base 59 Clip 61 Hinge 70 Cover 71 Cover body 72 Openable door 73 First sealing member 74 Second sealing member 75 Operation mechanism 76 Locking device 81 Inverter 82 First voltage converter 83 Second voltage converter 85 Cable 86 Cable 87 Cable 88 Cable 111 Front cover 111a Top surface 121 Front wheels 122 Rear wheels 151 Steering 162 Front pillar 163 Rear pillar 164 Roof 165 Windshield 166 Side glass 167 Step 168 Bottom 171 Upper frame portion 172 Front frame portion 173 Rear frame section 175 Reinforcement frame section 211 Tank case 212 Valve unit 213 Openable door 241 Battery casing 242 Fuel cell stack 300 Battery 301 Battery housing 302 Top surface 303 Front surface 334 PTO shaft 481 First fan 491 Second fan 531 Fuel cell connector (first connector) 531a Connection port (first connection port) 532 Inverter connector (first connector) 532a Connection port (first connection port)533 Service plug 533a Base 533b Plug 534 Voltage detector 534a Terminal 571 Low voltage connector (second connector) 571a Connection port (second connection port) 572 High voltage connector (second connector) 572a Connection port (second connection port) 573 Connector for electrical equipment 573a Connection port 711 Front wall 711a Lower part 711b Upper part 712 Rear wall 712b Upper part 713 Top wall 714 Side wall 715 Opening 716 Opening 721 Door body 721a Inner surface 722 Flange plate 723 Flange plate 724 Flange plate 725 Flange plate 726 Flange plate 751 Frame body 752 Handle 761 Hook 762 Locking portion 762a Bracket 762b Shaft

Claims

1. A work vehicle comprising a vehicle body, a fuel cell mounted on the vehicle body, a battery unit for storing the power generated by the fuel cell, a motor mounted on the vehicle body and driven by the power stored in the battery unit, an equipment case disposed on the battery unit, and a cover for covering the equipment case.

2. The work vehicle according to claim 1, further comprising a first external terminal provided outside the equipment case, wherein the cover has a cover body for covering the equipment case and the first external terminal, and an opening / closing door provided on the cover body for accessing the first external terminal.

3. The work vehicle according to claim 1 or 2, comprising a first junction having the equipment case and a first external terminal provided outside the equipment case, and a second junction having a second external terminal disposed on the battery unit, wherein the cover covers the first junction and the second junction.

4. The work vehicle according to claim 3, wherein the first external terminal has a first connector for inputting or outputting power, the second external terminal has a second connector for inputting or outputting power, and the first connector is disposed above the second connector.

5. The work vehicle according to claim 4, wherein the battery unit is disposed outside the vehicle body in the vehicle width direction, the first connector has a first connection port to which a corresponding cable is connected, the second connector has a second connection port to which a corresponding cable is connected, and the first connection port and the second connection port each open inward in the vehicle width direction.

6. The work vehicle according to claim 5, wherein the cover has an opening for drawing out the cables respectively connected to the first connection port and the second connection port inward in the vehicle width direction.

7. The work vehicle according to claim 5 or 6, wherein the second junction is disposed inside the vehicle width direction of the first junction above the battery unit.

8. The work vehicle according to claim 7, wherein the cover has a cover body for covering the first junction and the second junction, and an opening / closing door provided outside the cover body in the vehicle width direction.

9. The first external terminal is provided outside the equipment case in the vehicle width direction and has a service plug for cutting off the power path, and the service plug is arranged in the vicinity of the opening / closing door. The work vehicle according to claim 8.

10. The first external terminal is provided outside the equipment case in the vehicle width direction and has a voltage detector for checking the energization of the power path, and the voltage detector is arranged in the vicinity of the opening / closing door. The work vehicle according to claim 8 or claim 9.

11. The work vehicle includes a driver's seat mounted on the vehicle body, a cabin having the driver's seat inside, and a traveling device having front wheels and rear wheels. The battery unit is arranged between the front wheels and the rear wheels outside the vehicle width direction of the vehicle body, and the equipment case is arranged in front of the cabin above the battery unit. The work vehicle according to any one of claims 1 to 10.

12. The cabin has a windshield, and the cover is arranged at a position visible from the driver's seat through the windshield. The work vehicle according to claim 11.

13. The cabin has side glasses, and the cover is arranged at a position visible from the driver's seat through the side glasses. The work vehicle according to claim 11.

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