Work vehicle

Abstract

To provide a work vehicle which enables work of an electric system to be performed efficiently.SOLUTION: A work vehicle of the disclosure includes a vehicle body, a motor mounted on the vehicle body, a battery unit having a battery which stores electric power to be supplied to the motor, and a junction box which distributes electric power output from the battery unit. The junction box is disposed on the battery unit.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to work vehicles. [Background technology]

[0002] Patent Document 1 discloses an electric tractor including an electric motor, a battery, an inverter, a voltage converter, and a traveling device. The inverter converts DC power from the battery into AC power and supplies it to the electric motor. When power is supplied to the electric motor, the electric motor drives the traveling device. The voltage converter reduces the power sent from the battery to supply power to low-current electrical equipment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-060665 Summary of the Invention [Problem to be solved by the invention]

[0004] An electric tractor needs to be equipped with a junction box that distributes the power output from the battery to supply power to the electric motor, inverter, voltage converter, etc. The junction box is required to be located in a position where the assembly and maintenance work of the electrical system can be performed efficiently. However, Patent Document 1 does not anticipate locating the junction box in consideration of the work efficiency of the electrical system. An object of the present disclosure is to provide a work vehicle that is capable of efficiently performing work on an electrical system. [Means for solving the problem]

[0005] The work vehicle of the present disclosure comprises a vehicle body, a motor mounted on the vehicle body, a battery unit having a battery that stores power supplied to the motor, and a junction box that distributes the power output from the battery unit, the junction box being positioned on top of the battery unit. Effect of the Invention

[0006] According to the present disclosure, work on the electrical system of a work vehicle can be carried out efficiently. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing an embodiment of a work vehicle according to the present disclosure. [Diagram 2] FIG. 2 is a front view of the work vehicle shown in FIG. [Diagram 3] FIG. 3 is a rear view of the work vehicle shown in FIG. [Figure 4] FIG. 4 is a side view (right side view) of the work vehicle shown in FIG. [Diagram 5] FIG. 5 is a side view (left side view) of the work vehicle shown in FIG. [Figure 6] FIG. 6 is a plan view of the work vehicle shown in FIG. [Figure 7] FIG. 7 is a bottom view of the work vehicle shown in FIG. [Figure 8] FIG. 8 is a perspective view showing a part of the work vehicle shown in FIG. 1 in an exploded state. [Figure 9] FIG. 9 is a right side view of the work vehicle shown in FIG. 1 with the bonnet, cover, and part of the tank case removed. [Figure 10] FIG. 10 is a cross-sectional view taken along line II in FIG. [Figure 11] FIG. 11 is a perspective view of the junction box as seen from the outside in the vehicle width direction and from behind. [Figure 12] FIG. 12 is a perspective view of the junction box as seen from the inside in the vehicle width direction and from behind. [Figure 13]FIG. 13 is a perspective view of the junction box as seen from the outside in the vehicle width direction and from the front. [Figure 14] FIG. 14 is a perspective view of a junction box having no cover member as seen from the driver's seat in the cabin. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] <Overview of the embodiment of the present disclosure> Below, an overview of the embodiments of the present disclosure will be listed and described. (1) A work vehicle according to an embodiment includes a battery unit and a junction box that distributes power output from the battery unit, the junction box being disposed on top of the battery unit.

[0009] According to the above-mentioned work vehicle, the junction box that distributes the power output from the battery unit is disposed on top of the battery unit. This allows work such as distributing the power to be performed near the battery unit. This allows work on the electrical system to be performed efficiently.

[0010] (2) The work vehicle described in (1) above comprises a driver's seat mounted on the vehicle body, a cabin with the driver's seat inside, and a running gear having front and rear wheels, and it is preferable that the battery unit is arranged on the outside of the vehicle body in the vehicle width direction, between the front and rear wheels, and the junction box is arranged in front of the cabin. In this case, since the junction box is disposed in front of the cabin, the junction box can be disposed above the battery unit without interfering with the cabin.

[0011] (3) The work vehicle described in (2) above comprises a fuel cell that generates electricity by supplying fuel to be stored in the battery unit, a tank for storing the fuel, and a mounting frame on which the tank is mounted, and it is preferable that the mounting frame has a front frame portion extending in the vertical direction in front of the cabin, and that the junction box is positioned behind the front frame portion. In this case, since the junction box is disposed behind the front frame portion, the junction box can be disposed above the battery unit without interfering with the front frame portion.

[0012] (4) In the work vehicle described in (2) or (3), the junction box has a housing and a plurality of connectors for inputting or outputting electric power, the rear surface of the housing is positioned to form a gap between the housing and the cabin, and it is preferable that the plurality of connectors are provided on the rear surface of the housing. In this case, the multiple connectors of the junction box are disposed in a gap formed between the rear surface of the housing and the cabin, making it easy to access the multiple connectors from outside the gap in the vehicle width direction.

[0013] (5) The work vehicle described in (4) above is equipped with a fuel cell that generates electricity to be stored in the battery unit by supplying fuel, and it is preferable that the multiple connectors include a fuel cell connector to which the electricity generated by the fuel cell is input. In this case, since the fuel cell connector, to which the power generated by the fuel cell is input, is provided on the rear surface of the housing, the fuel cell connector can be easily accessed.

[0014] (6) It is preferable that the work vehicle described in (4) or (5) above is equipped with an inverter that converts DC power into AC power and outputs the AC power to the motor, and that the multiple connectors include an inverter connector that outputs power to the inverter. In this case, since the inverter connector that outputs power to the inverter is provided on the rear surface of the housing, the inverter connector can be easily accessed.

[0015] (7) The work vehicle described in (5) above is equipped with an inverter that converts DC power into AC power and outputs the AC power to the motor, and the multiple connectors include an inverter connector that outputs power to the inverter, and it is preferable that the fuel cell connector and the inverter connector are arranged on the rear surface of the housing, shifted in the vertical direction and also shifted in the vehicle width direction. In this case, the fuel cell connector and the inverter connector are arranged on the rear surface of the housing with a vertical offset and with a widthwise offset, which makes it possible to prevent interference between the connection and disconnection of the cable to the fuel cell connector and the connection and disconnection of the cable to the inverter connector, thereby making work on the electrical system more efficient.

[0016] (8) In the work vehicle described in (7) above, it is preferable that the fuel cell connector and the inverter connector each have a connection port to which a corresponding cable is connected, and that the connection port opens toward the inside of the housing in the vehicle width direction. In this case, the cables are connected to the connection ports of the fuel cell connector and the inverter connector from the inside to the outside in the vehicle width direction of the housing, which allows the cables to be connected to the fuel cell connector and the inverter connector in a compact manner in the front-rear direction of the vehicle.

[0017] (9) It is preferable that the work vehicle described in any of (4) to (8) above is equipped with a first voltage converter that reduces the voltage of the power input from the battery unit, and that the multiple connectors include a first connector that outputs power to the first voltage converter. In this case, since the first connector that outputs power to the first voltage converter is provided on the rear surface of the housing, the first connector can be easily accessed.

[0018] (10) The work vehicle described in (9) above is provided with a second voltage converter that reduces the power input from the battery unit, and the multiple connectors include a second connector that outputs power to the second voltage converter, and it is preferable that the first connector and the second connector are arranged on the rear surface of the housing with a vertical offset and also with a horizontal offset. In this case, the first connector and the second connector are arranged on the rear surface of the housing with a vertical offset therebetween and with a horizontal offset therebetween, which makes it possible to prevent interference between the first connector and the second connector when attaching and detaching the cable to and from the housing, thereby enabling more efficient work on the electrical system.

[0019] (11) In the work vehicle described in (10), it is preferable that the first connector and the second connector each have a connection port to which a corresponding cable is connected, and that the connection port opens toward the inside of the housing in the vehicle width direction. In this case, the cables are connected to the connection ports of the first connector and the second connector from the inside to the outside in the vehicle width direction of the housing, thereby enabling the cables to be connected to the first connector and the second connector in a compact manner in the front-rear direction of the vehicle.

[0020] (12) It is preferable that the work vehicle described in any one of (4) to (11) above includes an electrical component, and the plurality of connectors includes an electrical component connector that outputs power to the electrical component. In this case, since the electrical equipment connector that outputs power to the electrical equipment is provided on the rear surface of the housing, the electrical equipment connector can be easily accessed.

[0021] (13) In the work vehicle described in any one of (4) to (12), it is preferable that the junction box has a service plug for cutting off the power path, and that the service plug is provided on the rear surface of the housing. In this case, the service plug of the junction box is disposed in a gap formed between the rear surface of the housing and the cabin, making it easy to access the service plug from outside the gap in the vehicle width direction.

[0022] (14) In a work vehicle described in any one of (4) to (13), it is preferable that the junction box has a fuse, the housing has a main body portion having an opening formed on the front side and a front panel portion removably attached to the main body portion and covering the opening, and the fuse is provided in a position within the main body portion that is removable from the opening. In this case, by removing the front plate from the main body of the housing, the fuse provided within the main body can be removed through the opening in the front surface of the main body, facilitating the replacement of the fuse.

[0023] (15) In the work vehicle described in any one of (4) to (14) above, it is preferable that the junction box has a cover member that covers the multiple connectors. In this case, since the multiple connectors are covered with the cover member, damage to the multiple connectors can be suppressed.

[0024] (16) In the work vehicle described in any one of (4) to (14), it is preferable that the cabin has a windshield, and at least one of the multiple connectors is positioned in a position visible through the windshield from the driver's seat. In this case, the operator sitting in the driver's seat can easily see the connector of the junction box through the windshield of the cabin.

[0025] (17) In the work vehicle described in any one of (4) to (14) and (16), it is preferable that the cabin has a side glass, and at least one of the multiple connectors is positioned in a position visible through the side glass from the driver's seat. In this case, the operator sitting in the driver's seat can easily see the connector of the junction box through the side window of the cabin.

[0026] <Details of the embodiment> Hereinafter, preferred embodiments will be described with reference to the drawings. [Overall configuration of the work vehicle] Fig. 1 is a perspective view showing an embodiment of a work vehicle of the present disclosure. Fig. 2 to Fig. 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.

[0027] 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 fore-aft direction of the work vehicle 10 is defined as the vehicle fore-aft direction. The left-right direction perpendicular to the vehicle fore-aft direction is defined as the vehicle width direction. The direction perpendicular to both the vehicle fore-aft direction and the vehicle width direction is defined as the up-down direction. The up-down direction is also called the height direction. In each figure, an orthogonal three-dimensional coordinate system is shown, with the forward direction indicated by an arrow X1, the backward direction indicated by an arrow X2, the left direction indicated by an arrow Y1, the right direction indicated by an arrow Y2, the up direction indicated by an arrow Z1, and the down direction indicated by an arrow Z2.

[0028] 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 for storing fuel, and a driving device 14 that is driven by the fuel stored in the tank 13. The fuel is hydrogen, and the tank 13 is a hydrogen tank that stores hydrogen gas. The work vehicle 10 of this embodiment is a fuel cell vehicle (FCV), and travels using electricity generated by a fuel cell (fuel cell module) 24 using hydrogen and oxygen.

[0029] 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, and supplies the stored power to the motor 31. The work vehicle 10 is equipped with piping (hydrogen piping) 22 for hydrogen gas, 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 machine (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).

[0030] The work vehicle 10 (see FIG. 1) comprises 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. Specific configurations of the mounting frame 17 and the support frame 37 will be described later. The work vehicle 10 (see FIG. 7) comprises an exhaust path 35. The exhaust path 35 exhausts water or water vapor generated by power generation in the fuel cell 24 to the outside.

[0031] [Body] The vehicle body 11 has a chassis 41, a bonnet 34, a cover 111, and a fender 47. The fender 47 covers a rear wheel 122 from above. The chassis 41 supports the traveling gear 12, the drive gear 14, and the cabin 16. Fig. 8 is an exploded perspective view of a portion of the work vehicle 10 shown in Fig. 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 transverse frame 45 and a second transverse frame 46 that extend in the vehicle width direction.

[0032] The front frame 32, the first horizontal frame 45, and the second horizontal frame 46 are formed by combining metal frame materials and the like. The front frame 32 mounts the motor 31. The first horizontal frame 45 is fixed to the front frame 32 behind the front wheels 121. The second horizontal frame 46 is fixed to the front frame 32 in front of the front wheels 121. Both end portions in the vehicle width direction of each of the first horizontal frame 45 and the second horizontal frame 46 extend outward in the vehicle width direction beyond the front frame 32 (see FIG. 7).

[0033] The gear case 33 is configured to have 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 speed of rotation of the output shaft of the motor 31, and outputs the rotation to the traveling device 12 (one or both of the front wheels 121 and the rear wheels 122).

[0034] 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 working device (not shown), also called an implement. The working device is operated by the power of the motor 31. The working device is, for example, a tiller.

[0035] 9 is a right side view of the work vehicle 10 with the bonnet 34, cover 111, and part of the tank case 211 of the tank unit 21 removed. Starting from the front of the vehicle, a first radiator 48, a fuel cell 24, and a second radiator 49 are mounted on the chassis 41 in this order. 4 and 9, the bonnet 34 and the cover 111 cover mounted components located near the front of the vehicle body 11. The bonnet 34 covers the fuel cell 24 and the first radiator 48 from above and on both sides in the vehicle width direction. The cover 111 covers the second radiator 49 located behind the fuel cell 24 from above and on both sides in the vehicle width direction.

[0036] An upper surface 48a of the first radiator 48 is lower than an upper surface 24a of the fuel cell 24. The upper surface 24a of the fuel cell 24 is lower than an upper surface 49a of the second radiator 49. The top surface 111a of the cover 111 is higher than the top surface 34a of the bonnet 34, but lower than the top end of the steering wheel 151 that is operated for steering by an operator sitting in the driver's seat 15. The top surface 34a of the bonnet 34 becomes lower toward the front. For this reason, the view of the operator sitting in the driver's seat 15 is less likely to be obstructed.

[0037] [Driver's seat and cabin] The driver's seat 15 and the cabin 16 are provided on the chassis 41 at a position toward the rear (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.

[0038] The cabin 16 has a transparent windshield 165 located in front of the driver's seat 15, and transparent side glasses 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 glasses 166 are provided between the front pillar 162 and the rear pillar 163. The windshield 165 and the side glasses 166 are each provided over the entire cabin 16 from the ceiling to the floor. The side glasses 166 can be opened and closed, and function as doors for an operator to enter and exit the cabin 16.

[0039] A step 167 (see FIG. 5) is provided on one side (left side) in the vehicle width direction of the cabin 16. The step 167 is a member on which an operator who gets on and off the cabin 16 places his or her feet. A cover 111 and a bonnet 34 are provided in front of the cabin 16. As shown in Fig. 2 and Fig. 6, the dimensions of the 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 cover 111 in the vehicle width direction.

[0040] The work vehicle 10 of this embodiment is equipped with a cabin 16, but may not be equipped with the cabin 16. The work vehicle 10 may be equipped with a canopy or a rope instead of the cabin 16. When the work vehicle 10 does not have the cabin 16, the tank unit 21 is mounted on the mounting frame 17 and positioned above the driver's seat 15.

[0041] [Running device 12] The traveling gear 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 becomes 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).

[0042] [Drive unit] 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 between the front wheels 121 and rear wheels 122, on the outer side in the vehicle width direction of the vehicle body 11 (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.

[0043] 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 a plurality of battery cells. Each battery cell has a positive electrode and a negative electrode. The plurality of battery cells are in a stacked state. The power generated by each battery cell is collected and output to the battery unit 30.

[0044] The motor 31 has a rotating rotor and a stator having a number of 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.

[0045] The battery unit 30 is mounted on a support frame 37 attached to a chassis 41 (see FIG. 8). The support frame 37 is a frame structure and is located between the front wheels 121 and the rear wheels 122. The support frame 37 in this embodiment has a pair of fixed frame parts 38 extending outward in the vehicle width direction from the chassis 41, and a pair of mounting frame parts 39 extending in the vehicle front-rear direction and connecting both fixed frame parts 38. The inner ends of the fixed frame parts 38 in the vehicle width direction are fixed to the gear case 33. The upper surface of the mounting frame parts 39 is a mounting surface 39a on which the battery unit 30 is mounted. By being mounted on the mounting surfaces 39a of both mounting frame parts 39, the battery unit 30 is positioned outward in the vehicle width direction of the vehicle body 11.

[0046] [Tank unit] The tank unit 21 (see FIG. 9) has a 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 the case of 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.

[0047] The tank case 211 is a box capable of accommodating 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 opens in the vehicle width direction. The tank case 211 is installed above the roof 164 with a gap therebetween in the vertical direction. The tank case 211 is fixed to an upper frame portion 171 of the mounting frame 17. The tank case 211 is made of a metal such as aluminum or steel, and protects the tank 13 against external thermal and physical influences.

[0048] The tank 13 is disposed above the cabin 16 (driver's seat 15). This allows for a high degree of freedom in the arrangement of the fuel cell 24, filling section 25, motor 31, and battery unit 30 in the vehicle body 11. When a work vehicle with a conventional internal combustion engine is modified to a work vehicle 10 having the fuel cell 24 and motor 31 as in this embodiment, there is no need to significantly change the arrangement of the various devices.

[0049] The tank 13 is connected to the rear pipe 22r and the front pipe 22f via the valve unit 212 (see FIG. 9). The rear pipe 22r (see FIG. 3) is a gas inlet pipe that connects the hydrogen gas filling port 26 and the valve unit 212, and guides the hydrogen gas introduced into the filling port 26 to the tank 13. The front pipe 22f (see FIG. 2) is a gas outlet pipe that connects the fuel cell 24 and the valve unit 212, and guides the hydrogen gas stored in the tank 13 to the fuel cell 24. The tank 13 stores the hydrogen gas introduced into the filling 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.

[0050] [Mounting frame] 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 a front frame portion 172, a rear frame portion 173, and a reinforcing frame portion 175.

[0051] The pair of front frame portions 172 extend in the vertical direction in front of the cabin 16 and on the outer sides in the vehicle width direction of the vehicle body 11. Upper ends of the pair of front frame portions 172 are respectively fixed to left and right corners on the front side of the upper frame portion 171. Lower ends of the pair of front frame portions 172 are respectively fixed to both ends in the vehicle width direction of the first horizontal frame 45 of the chassis 41. 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 end of the rear frame portion 173 is fixed to the left and right corners on the rear side of the upper frame portion 171, respectively. The lower end of the rear frame portion 173 is fixed to the chassis 41. The rear frame portion 173 is provided with a filling portion 25 (see FIG. 3).

[0052] The pair of reinforcing frame portions 175 are reinforcing members for receiving the inertial force that causes the upper frame portion 171 and the tank case 211 to move forward when the working vehicle 10 stops while traveling. The pair of reinforcing frame portions 175 are located in front of the front frame portion 172 and on both sides of the bonnet 34 in the vehicle width direction. Upper ends of the pair of reinforcing frame portions 175 are respectively fixed to the left and right corners on the front side of the upper frame portion 171. Lower ends of the pair of reinforcing frame portions 175 are respectively fixed to both ends in the vehicle width direction of the second horizontal frame 46 of the chassis 41 (see FIG. 2).

[0053] [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.

[0054] 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 the present 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.

[0055] [Radiator] The work vehicle 10 (see Figs. 4 and 5) is equipped with a cooling system that cools the fuel cell 24, motor 31, inverter 81, voltage converters 82, 83, etc. with a coolant. 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.

[0056] The first radiator 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. First radiator 48 is connected, via a first cooling flow path (not shown) having a circulation pump, to electrical equipment (heat-generating components) that require cooling, such as motor 31, inverter 81, and voltage converters 82, 83. 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 passage (not shown) having a circulation pump. The second radiator 49 cools the coolant supplied through the second cooling passage by heat exchange with the outside air.

[0057] 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, thereby promoting heat exchange with the coolant.

[0058] [Battery unit] The battery unit 30 accumulates power to be supplied to the motor 31. The battery unit 30 (see FIG. 9) has a battery (battery pack) 300 and a battery casing 301 that houses the battery 300. The battery 300 temporarily accumulates power generated by the fuel cell 24 and outputs the accumulated 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 storage battery. The battery casing 301 has a rectangular parallelepiped shape that is long in the front-rear direction of the vehicle. The bottom surface of the battery casing 301 is placed on and fixed to the mounting surface 39a (see FIG. 8) of the support frame 37.

[0059] [Electrical system] The work vehicle 10 (see FIG. 9) has a junction box 50. The junction box 50 is an electric connection box for relaying connections and distributing the electric 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 a junction box 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.

[0060] The battery unit 30 is connected to a first voltage converter 82 and a second voltage converter 83 through a junction box 50. The first voltage converter 82 and the second voltage converter 83 constitute a step-down circuit that steps down the power input from the battery unit 30.

[0061] The work vehicle 10 is equipped with low-voltage electrical equipment that operates at a lower voltage than the motor 31. In the present embodiment, the low-voltage electrical equipment includes radiators 48, 49 and an air conditioner (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) through a junction box 50.

[0062] [Junction box] The junction box 50 (see Figs. 1, 4, and 6) is disposed above the battery unit 30 (see Fig. 4). The junction box 50 of this embodiment is disposed on the front side above the battery unit 30, in front of the cabin 16 and behind the front frame portion 172. The junction box 50 of this embodiment is also disposed to the right rear of the bonnet 34 and on the lower right side of the cover 111.

[0063] Figure 10 is a cross-sectional view taken along the line II in Figure 4. In Figure 10, the cross-sectional structure inside the battery unit 30 is omitted. As shown in Figures 4 and 10, the battery unit 30 is mounted on the support frame 37 as described above and is disposed between the first horizontal frame 45 (front frame portion 172) and the rear wheel 122 on the right side of the vehicle body 11. A part 30a of the battery unit 30 is disposed so as to be recessed into the lower right corner of the bottom 168 of the cabin 16. The other part 30b of the battery unit 30 protrudes to the right of the side glass 166 of the cabin 16 (see Figure 10) and protrudes forward of the windshield 165 of the cabin 16 (see Figure 4).

[0064] The junction box 50 is placed on the battery unit 30 in a portion that protrudes forward beyond the windshield 165. The dimension of the junction box 50 in the vehicle width direction is the same as the dimension of the battery unit 30 in the vehicle width direction. The junction box 50 is placed on the battery unit 30 so as not to protrude from the battery unit 30 on either side in the vehicle width direction.

[0065] As shown in FIG. 10, an upper surface 52e of a main body 52 (described later) of the junction box 50 is disposed at a position higher than a bottom 168 of the cabin 16. A part 50a of the junction box 50 is disposed facing a lower right part of the front surface of the windshield 165. The other part 50b of the junction box 50 protrudes to the right side of the side window 166. In the windshield 165 on the side where the junction box 50 is disposed, i.e., on the right side (right part) of the windshield 165, the lower end of the right part is close to the bottom 168 of the cabin 16 or reaches the bottom 168 of the cabin 16. In addition, in the side where the junction box 50 is disposed, i.e., the right side window 166, the lower end of the right side window 166 is close to the bottom 168 of the cabin 16 or reaches the bottom 168 of the cabin 16. This makes it easy to see the multiple connectors of the junction box 50 from inside the cabin 16 through the windshield 165 and side windows 166.

[0066] , The 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. The cover 111 is disposed at a height position midway up and down on the front frame portions 172 in a side view. The lower right end of the cover 111 is disposed on top of the junction box 50. In other words, the junction box 50 is disposed between the cover 111 and the battery unit 30 in the up-down direction in a right side view.

[0067] , The bonnet 34 is disposed on the vehicle body 11 in front of the cover 111. The right rear end of the bonnet 34 is disposed in front of the junction box 50. In other words, the junction box 50 is disposed between the windshield 165 of the cabin 16 and the bonnet 34 in the vehicle front-rear direction when viewed from the right side.

[0068] Fig. 11 is a perspective view of the junction box 50 seen from the outside in the vehicle width direction and from behind. Fig. 12 is a perspective view of the junction box 50 seen from the inside in the vehicle width direction and from behind. The junction box 50 has a housing 51, multiple connectors 54, 55, 56, 57, 58, a service plug 59, and a cover member 60. Fig. 12 shows a state in which the cover member 60 and cables 85 to 89 described later have been removed.

[0069] FIG. 13 is a perspective view of the junction box 50 seen from the outside and front in the vehicle width direction. The housing 51 of the junction box 50 has a main body 52 and a front plate 53 detachably provided on the main body 52. ​​The main body 52 has a rectangular parallelepiped shape that is long in the vehicle width direction. As shown in FIG. 11 and FIG. 12, the dimension of the main body 52 in the vehicle width direction is approximately the same as the dimension of the battery housing 301 in the vehicle width direction. Side surfaces 52a and 52b on both sides of the main body 52 in the vehicle width direction are disposed flush with the side surfaces 302 and 303 on both sides of the battery housing 301 in the vehicle width direction, respectively. A gap 19 is formed between the rear surface 52c of the main body 52 and the front pillar 162 of the cabin 16 (see FIG. 4).

[0070] As shown in Fig. 13, a rectangular opening 52f is formed in the front surface 52d of the main body 52. ​​The front plate 53 is detachably fixed to the front surface 52d of the main body 52 by a plurality of screws 61. When the front plate 53 is fixed to the front surface 52d of the main body 52, it closes the opening 52f of the main body 52. ​​An outer surface (front surface) 53a of the front plate 53 is disposed flush with the front surface 304 of the battery housing 301 (see Fig. 4).

[0071] The main body 52 houses a relay (not shown), a bus bar (not shown), a fuse 71 (see FIG. 13), and the like. The relay is electrically connected to the battery unit 30. The bus bar is electrically connected to the inverter 81 and the voltage converters 82, 83. The fuse 71 is provided in each power path connecting the fuel cell 24, the inverter 81, and the voltage converters 82, 83. The fuse 71 is provided in a position within the main body 52 that allows it to be removed from the opening 52f. The fuse 71 in this embodiment is provided on the upper side within the main body 52.

[0072] Each of the connectors 54-58 (see Figs. 11 and 12) is a component through which power is input or output. The service plug 59 is a component that cuts off the power path connected to the battery unit 30. Each of the connectors 54-58 and the service plug 59 are provided on the rear surface 52c of the housing 51. The details of each of the connectors 54-58 and the service plug 59 will be described later.

[0073] The cover member 60 is detachably provided at the rear of the main body 52 of the housing 51. The cover member 60 covers the connectors 54 to 58 and the service plug 59 from behind. The cover member 60 in this embodiment has a rectangular box shape, and covers the entire rear surface 52c of the main body 52. ​​An opening 60a is formed on the inside of the cover member 60 in the vehicle width direction.

[0074] [Connectors and service plugs] The junction box 50 of this embodiment (see FIGS. 11 and 12) has a fuel cell connector 54, an inverter connector 55, a first connector 56, a second connector 57, and an electrical equipment connector 58 as a plurality of connectors.

[0075] The fuel cell connector 54 is a connector into which the electric power generated by the fuel cell 24 is input. The fuel cell connector 54 is fixed to the rear surface 52c of the housing 51 with screws 62. The fuel cell connector 54 has a connection port 54a to which one end of a cable 85 is connected. The connection port 54a opens toward the inside of the housing 51 in the vehicle width direction. The cable 85, one end of which is connected to the connection port 54a, extends toward the inside in the vehicle width direction along the rear surface 52c of the housing 51 and is drawn out from the opening 60a of the cover member 60. The other end of the cable 85 drawn out from the opening 60a of the cover member 60 is connected to the fuel cell 24.

[0076] The inverter connector 55 is a connector that outputs electric power to the inverter 81. The inverter connector 55 is approximately the same size as the fuel cell connector 54. The inverter connector 55 is fixed to the rear surface 52c of the housing 51 with a screw 63. The inverter connector 55 has a connection port 55a to which one end of a cable 86 is connected. The connection port 55a opens toward the inside of the housing 51 in the vehicle width direction. The cable 86, one end of which is connected to the connection port 55a, extends toward the inside of the vehicle width direction along the rear surface 52c of the housing 51 and is drawn out from the opening 60a of the cover member 60. The other end of the cable 86 drawn out from the opening 60a of the cover member 60 is connected to the inverter 81.

[0077] The fuel cell connector 54 is disposed on the outer side in the vehicle width direction and in the center in the up-down direction on the rear surface 52c of the housing 51. The inverter connector 55 is disposed on the outer side in the vehicle width direction and below the fuel cell connector 54 on the rear surface 52c of the housing 51. In other words, the fuel cell connector 54 and the inverter connector 55 are disposed on the rear surface 52c of the housing 51 with a vertical offset and with a vertical offset in the vehicle width direction.

[0078] The first connector 56 is a connector that outputs electric power to the first voltage converter 82. The first connector 56 is smaller than the fuel cell connector 54 and the inverter connector 55. The first connector 56 is fixed to the rear surface 52c of the housing 51 with a screw 64. The first connector 56 has a connection port 56a to which one end of a cable 87 is connected. The connection port 56a opens toward the inside of the housing 51 in the vehicle width direction. The cable 87, one end of which is connected to the connection port 56a, extends toward the inside of the vehicle width direction along the rear surface 52c of the housing 51 and is drawn out from the opening 60a of the cover member 60. The other end of the cable 87 drawn out from the opening 60a of the cover member 60 is connected to the first voltage converter 82.

[0079] The second connector 57 is a connector that outputs electric power to the second voltage converter 83. The second connector 57 is the same size as the first connector 56. The second connector 57 is fixed to the rear surface 52c of the housing 51 by a screw 65. The second connector 57 has a connection port 57a to which one end of a cable 88 is connected. The connection port 57a opens toward the inside of the housing 51 in the vehicle width direction. The cable 88, one end of which is connected to the connection port 57a, extends toward the inside of the vehicle width direction along the rear surface 52c of the housing 51 and is drawn out from the opening 60a of the cover member 60. The other end of the cable 88 drawn out from the opening 60a of the cover member 60 is connected to the second voltage converter 83.

[0080] The second connector 57 is disposed on the inside and above the fuel cell connector 54 in the vehicle width direction on the rear surface 52c of the housing 51. In other words, the fuel cell connector 54 and the second connector 57 are disposed on the rear surface 52c of the housing 51 so as to be shifted in the up-down direction and also in the vehicle width direction. The first connector 56 is disposed inside and above the second connector 57 in the vehicle width direction. That is, the first connector 56 and the second connector 57 are disposed on the rear surface 52c of the housing 51 so as to be shifted in the up-down direction and also in the vehicle width direction.

[0081] The electrical equipment connector 58 is a connector that outputs power to low-voltage electrical equipment. The electrical equipment connector 58 is disposed above the fuel cell connector 54, and is fixed to the rear surface 52c of the housing 51 with screws 66. The electrical equipment connector 58 has a connection port 58a to which one end of a cable (power line) 89 is connected. The connection port 58a opens toward the rear of the housing 51. The cable 89, one end of which is connected to the connection port 58a, extends inward in the vehicle width direction along the rear surface 52c of the housing 51, and is drawn out from an opening 60a of the cover member 60. The other end of the cable 89 drawn out from the opening 60a of the cover member 60 is connected to the low-voltage electrical equipment.

[0082] Service plug 59 is provided on the outer side and upper side in the vehicle width direction at the rear side of housing 51. Service plug 59 has a base 591 and a plug 592 detachably attached to base 591. Base 591 is disposed within main body 52 of housing 51, and is fixed to the inner surface of main body 52 (the surface opposite rear surface 52c) with screws 67. Plug 592, attached to base 591, is exposed behind rear surface 52c of housing 51.

[0083] A part of the power path (wiring) connected to the battery unit 30 is provided so as to pass through the inside of the base 591 and the plug 592 of the service plug 59. When the plug 592 is removed from the base 591, the power path is physically cut off. This allows an operator to safely perform maintenance work by removing the plug 592 from the base 591 to cut off the power path.

[0084] [Effects of the embodiment] According to the work vehicle 10 of this embodiment, the junction box 50 that distributes the power output from the battery unit 30 is disposed on top of the battery unit 30. This allows work such as distributing power to be performed in the vicinity of the battery unit 30. This allows work on the electrical system to be performed efficiently.

[0085] The junction box 50 is disposed in front of the cabin 16 and behind the front frame portion 172 of the mounting frame 17. This allows the junction box 50 to be disposed above the battery unit 30 without interfering with the cabin 16 and the front frame portion 172.

[0086] The multiple connectors 54-58 and the service plug 59 of the junction box 50 are disposed in a gap 19 formed between the rear surface 52c of the housing 51 and the cabin 16. This allows easy access to the multiple connectors 54-58 and the service plug 59 from the outside of the gap 19 in the vehicle width direction.

[0087] A fuel cell connector 54 is provided on the rear surface 52c of the housing 51. This allows easy access to the fuel cell connector 54 from outside the gap 19 in the vehicle width direction. This allows the junction box 50 to efficiently perform the work of relaying and connecting power between the fuel cell 24 and the battery unit 30.

[0088] An inverter connector 55, a first connector 56, a second connector 57, and an electrical equipment connector 58 are provided on a rear surface 52c of the housing 51. This allows easy access to each of the connectors 55 to 58 from the outside of the gap 19 in the vehicle width direction. Therefore, in the junction box 50, the work of distributing power from the battery unit 30 to the inverter 81, the first voltage converter 82, the second voltage converter 83, and the low-voltage electrical equipment can be performed efficiently.

[0089] The fuel cell connector 54 and the inverter connector 55 are disposed offset in the vertical direction and in the vehicle width direction on the rear surface 52c of the housing 51. This makes it possible to prevent interference between the cable 85 and the cable 86 when attaching and detaching the cable 85 to and from the fuel cell connector 54 and the cable 86 to and from the inverter connector 55. As a result, work on the electrical system can be performed more efficiently.

[0090] The connection ports 54a, 55a of the fuel cell connector 54 and the inverter connector 55 open toward the inside in the vehicle width direction of the housing 51. Therefore, the cables 85, 86 are connected to the connection ports 54a, 55a from the inside toward the outside in the vehicle width direction of the housing 51. This allows the cables 85, 86 to be connected to the fuel cell connector 54 and the inverter connector 55 in a compact manner in the front-to-rear direction of the vehicle.

[0091] The first connector 56 and the second connector 57 are disposed on the rear surface 52c of the housing 51 with a vertical offset therebetween and with a horizontal offset therebetween. This makes it possible to prevent interference between the cable 87 attached to the first connector 56 and the cable 88 attached to the second connector 57. As a result, work on the electrical system can be performed more efficiently.

[0092] The connection ports 56a, 57a of the first connector 56 and the second connector 57 open toward the inside in the vehicle width direction of the housing 51. Therefore, the cables 87, 88 are connected to the connection ports 56a, 57a from the inside toward the outside in the vehicle width direction of the housing 51. This allows the cables 87, 88 to be connected to the first connector 56 and the second connector 57 in a compact manner in the vehicle front-rear direction.

[0093] The fuse 71 is provided in a position within the body portion 52 of the junction box 50 that allows it to be removed from the opening 52f. Therefore, by removing the front plate portion 53 from the body portion 52, the fuse 71 provided within the body portion 52 can be removed from the opening 52f in the front surface 52d of the body portion 52. This allows the fuse 71 to be easily replaced.

[0094] The multiple connectors 54 to 58 and the service plug 59 are covered with a cover member 60. This makes it possible to prevent the multiple connectors 54 to 58 and the service plug 59 from being damaged.

[0095] [Modification of Junction Box] The junction box 50 (see FIG. 12) may not have the cover member 60. In that case, the multiple connectors 54 to 58 and the service plug 59 are exposed at the rear surface 52c of the housing 51. FIG. 14 is a perspective view of the junction box 50 without the cover member 60, seen from the driver's seat 15 in the cabin 16. As described above, the windshield 165 and the side windows 166 of the cabin 16 are provided from the ceiling to the floor of the cabin 16. Therefore, at least one of the multiple connectors 54 to 58 and the service plug 59 is disposed at a position that can be seen from the driver's seat 15 through the windshield 165 or the side window 166 of the cabin 16.

[0096] 14 , the first connector 56 and the second connector 57 are disposed in positions that can be seen through the windshield 165 from the driver's seat 15. In addition, the electrical equipment connector 58 and the service plug 59 are disposed in positions that can be seen through the side window 166 from the driver's seat 15. This allows an operator sitting in the driver's seat 15 to easily see the connectors 56 to 58 and the service plug 59 of the junction box 50 through the windshield 165 or the side window 166 of the cabin 16.

[0097] The connectors and the like visible from the driver's seat 15 are not limited to those shown in Fig. 14. For example, the fuel cell connector 54 and the inverter connector 55 may be disposed in positions visible through the windshield 165 or the side window 166.

[0098] 〔others〕 The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope of the equivalents of the configurations described in the claims.

[0099] The work vehicle 10 may run using power stored in the battery unit 30, and may not be equipped with a fuel cell 24. The battery unit 30 may be disposed in a position other than that of the embodiment described above, so long as the battery unit 30 can be disposed thereon. The junction box 50 may be disposed in a position other than that of the embodiment described above, so long as it is disposed above the battery unit 30. The multiple connectors 54-58 and the service plug 59 on the rear surface 52c of the housing 51 may be disposed in positions other than those of the embodiment described above. [Explanation of symbols]

[0100] 10 Work vehicles 11 Body 12 Running gear 13. Tank 14 Drive unit 15 Driver's seat 16 Cabin 17 Mounting frame 19 Gap 21 Tank Unit 22 Piping 22f Front piping 22r rear piping 24 Fuel Cell 24a Top side 25 Filling section 26 Filling port 30 Battery unit 30a part 30b Other parts 31 Motor 32 Previous Frame 33 Gear case 34 Bonnet 34a Top 35 Excretion Route 37 Support frame 38 Fixed frame part 39 Mounting frame part 39a Placement surface 41 Chassis 43 Coupling device 45 First horizontal frame 46 Second horizontal frame 47 Fender 48 First Radiator 48a Top 49 Second radiator 49a Top side 50 Junction Box 50a part 50b Other parts 51 Case 52 Main body 52a Side 52b Side 52c rear 52d front 52e top side 52f aperture 53 Front plate part 53a Exterior 54 Fuel cell connector (connector) 54a Connection port 55 Inverter connector (connector) 55a Connection port 56 First Connector (Connector) 56a Connection port 57 Second connector (connector) 57a Connection port 58 Connectors for electrical equipment (connectors) 58a Connection port 59 Service plug 60 Cover member 60a Opening 61 Bis 62 Bis 63 Bis 64 bis 65 bis 66 bis 67 Bis 71 Fuse 81 Inverter 82 First Voltage Converter 83 Second Voltage Converter 85 Cable 86 Cable 87 Cable 88 Cable 89 Cable 111 Cover 121 Front wheel 122 Rear wheel 151 Steering 162 Front pillar 163 Back Pillar 164 Roof 165 Windshield 166 Side Glass 167 Steps 168 Bottom 171 Upper frame part 172 Front frame part 173 Rear frame part 175 Reinforcement frame part 211 Tank case 212 Valve unit 213 Opening and closing door 241 Battery Casing 242 Fuel Cell Stack 300 batteries 301 Battery case 302 Side 303 Side 304 Front 334 PTO shaft 481 First Fan 491 Second Fan 591 Base 592 Plug

Claims

1. The car body and A motor mounted on the vehicle body; a battery unit having a battery for storing power to be supplied to the motor; a junction box that distributes the power output from the battery unit; A work vehicle, wherein the junction box is disposed on top of the battery unit.

2. A driver's seat mounted on the vehicle body; a cabin having the driver's seat therein; A running device having front wheels and rear wheels, the battery unit is disposed between the front wheels and the rear wheels on an outer side of the vehicle body in a vehicle width direction, The work vehicle according to claim 1 , wherein the junction box is disposed in front of the cabin.

3. a fuel cell that generates electricity by supplying fuel to the cell unit; A tank for storing the fuel; a mounting frame on which the tank is mounted; The mounting frame has a front frame portion extending in a vertical direction in front of the cabin, The work vehicle according to claim 2 , wherein the junction box is disposed behind the front frame portion.

4. The junction box has a housing and a plurality of connectors through which power is input or output, The rear surface of the housing is disposed with a gap formed between the rear surface and the cabin, The work vehicle according to claim 2 or 3, wherein the plurality of connectors are provided on the rear surface of the housing.

5. a fuel cell that generates electricity to be stored in the cell unit by supplying fuel; The work vehicle according to claim 4 , wherein the plurality of connectors includes a fuel cell connector to which electric power generated by the fuel cell is input.

6. an inverter that converts DC power into AC power and outputs the AC power to the motor; The work vehicle according to claim 4 , wherein the plurality of connectors includes an inverter connector that outputs electric power to the inverter.

7. an inverter that converts DC power into AC power and outputs the AC power to the motor; the plurality of connectors includes an inverter connector that outputs power to the inverter, The work vehicle according to claim 5 , wherein the fuel cell connector and the inverter connector are disposed on the rear surface of the housing so as to be offset in the vertical direction and also offset in the vehicle width direction.

8. the fuel cell connector and the inverter connector each have a connection port to which a corresponding cable is connected, The work vehicle according to claim 7 , wherein the connection port opens toward an inner side in a vehicle width direction of the housing.

9. a first voltage converter that reduces the voltage of the power input from the battery unit; The work vehicle according to claim 4 , wherein the plurality of connectors includes a first connector that outputs power to the first voltage converter.

10. a second voltage converter that reduces the voltage of the power input from the battery unit; the plurality of connectors includes a second connector that outputs power to the second voltage converter; The work vehicle according to claim 9 , wherein the first connector and the second connector are disposed on the rear surface of the housing so as to be offset in a vertical direction and also offset in a vehicle width direction.

11. the first connector and the second connector each have a connection port to which a corresponding cable is connected; The work vehicle according to claim 10 , wherein the connection port opens toward an inner side in a vehicle width direction of the housing.

12. Equipped with electrical equipment, The work vehicle according to claim 4 , wherein the plurality of connectors includes an electrical component connector that outputs electric power to the electrical component.

13. the junction box has a service plug for interrupting a power path; The work vehicle according to claim 4 , wherein the service plug is provided on the rear surface of the housing.

14. The junction box has a fuse, The housing has a main body having an opening on a front surface thereof, and a front plate that is detachably provided on the main body and closes the opening, The work vehicle according to claim 4 , wherein the fuse is provided in the main body at a position that allows the fuse to be removed from the opening.

15. The work vehicle according to claim 4 , wherein the junction box has a cover member that covers the plurality of connectors.

16. The cabin has a windshield, 5. The work vehicle according to claim 4, wherein at least one of the plurality of connectors is disposed in a position visible from the driver's seat through the windshield.

17. The cabin has a side glass, 5. The work vehicle according to claim 4, wherein at least one of the plurality of connectors is disposed in a position visible from the driver's seat through the side window.

Images