Work vehicle

Abstract

To provide a technology that can suppress the occurrence of poor visibility caused by water vapor.SOLUTION: A work vehicle 1 according to the present disclosure comprises: a FC module 24, a vehicle body 11 on which the FC module 24 is mounted, and a discharge pipe 50 with a discharge outlet 56 that discharges wastewater from the FC module 24 to the outside. The discharge pipe 50 includes a standing pipe 52 that guides wastewater upward and discharges the guided wastewater through the discharge outlet 56.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a work vehicle.

Background Art

[0002] Patent Document 1 discloses a work vehicle including a motor and a fuel cell using hydrogen as fuel. The fuel cell generates electricity by an electrochemical reaction between hydrogen and air (oxygen). The generated electric power is used as electric power for driving the motor. The work vehicle travels using the rotational force of the motor as a driving force.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The emissions (exhaust gas) discharged from the fuel cell contain water generated by an electrochemical reaction. Therefore, when the emissions are released to the outside, the drained water (water vapor) contained in the emissions may appear like white smoke. For this reason, the water vapor that appears like white smoke may obstruct the view of the passengers of the work vehicle. Therefore, a technique capable of suppressing the occurrence of poor visibility due to water vapor from the exhaust gas is desired.

Means for Solving the Problems

[0005] The work vehicle according to the present disclosure includes a fuel cell, a vehicle body on which the fuel cell is mounted, and a discharge pipe having a discharge port for discharging the drained water from the fuel cell to the outside. The discharge pipe includes a riser pipe that guides the drained water upward and discharges the guided drained water from the discharge port.

Effects of the Invention

[0006] According to the present disclosure, the occurrence of poor visibility due to water vapor can be suppressed.

Brief Description of the Drawings

[0007]

Figure 1

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Figure 8A

Figure 8B

Figure 9A

Figure 9B

Modes for Carrying Out the Invention

[0008] First, the contents of the embodiments will be listed and described. [Overview of the Embodiment] (1) The work vehicle according to the present disclosure includes a fuel cell, a vehicle body on which the fuel cell is mounted, and a discharge pipe having a discharge port for discharging the drainage from the fuel cell to the outside. The discharge pipe includes a riser pipe that guides the drainage upward and discharges the guided drainage from the discharge port.

[0009] According to the above configuration, the drainage (water vapor) is guided upward by the riser pipe and discharged from the discharge port. Therefore, for example, if the riser pipe is provided such that the discharge port is arranged above the line of sight of the passengers of the work vehicle, even if the drainage (water vapor) appears like white smoke from the discharge port, it is possible to suppress the occurrence of situations such as obstructing the passengers' field of vision or fogging the cabin windows, and it is possible to suppress the occurrence of poor visibility due to water vapor.

[0010] (2) In the work vehicle of (1) above, the discharge pipe may further include an external pipe that extends from the vehicle body to the outside and is connected to the riser pipe. In this case, since the riser pipe is arranged outside the vehicle body, for example, it is possible to suppress the water vapor discharged from the discharge port from entering the cabin of the work vehicle. As a result, it is possible to effectively suppress the occurrence of poor visibility due to water vapor.

[0011] (3) In the work vehicle of (1) or (2) above, when the riser pipe is provided with an upper pipe that extends horizontally from the upper end or an intermediate portion, the discharge port may be provided in the upper pipe. In this case, the direction of the drainage (water vapor) discharged from the discharge port can be made horizontal, and the water vapor can be directed in a direction that does not affect the field of vision.

[0012] (4) In the work vehicle of (3) above, it is preferable that the upper pipe extends in a direction away from the vehicle body. In this case, the direction of the discharged water vapor can be directed in a direction away from the vehicle body.

[0013] (5) In any one of the work vehicles of (1) to (4) above, when the discharge pipe is provided in the riser pipe and further includes an external discharge port that discharges the drainage to the outside separately from the discharge port, the external discharge port may be located below the discharge port. For drainage, it includes water vapor and water (liquid) that is condensed after the water vapor is cooled in the discharge pipe. In contrast, since the present disclosure has an external discharge port, the water in the discharge pipe generated by the condensation of the water vapor can be discharged from the external discharge port, and it is possible to suppress the accumulation of water in the discharge pipe.

[0014] (6) In any one of the work vehicles (2) to (4) above, when the discharge pipe is provided in the external pipe and further includes an external discharge port for discharging the drainage to the outside separately from the discharge port, the external discharge port may be located below the discharge port. Also in this case, the water in the discharge pipe generated by the condensation of the water vapor in the discharge pipe can be discharged from the external discharge port, and it is possible to suppress the accumulation of water in the discharge pipe.

[0015] (7) In any one of the work vehicles (1) to (6) above, when the discharge pipe further includes a lower pipe connected to the riser pipe, the lower pipe may include an external discharge port for discharging the drainage to the outside separately from the discharge port. Also in this case, the water in the discharge pipe generated by the condensation can be discharged from the external discharge port, and it is possible to suppress the accumulation of water in the discharge pipe. Moreover, since an external discharge port is provided in the lower pipe, while suppressing the discharged water from spreading to other parts of the discharge pipe, the discharged water can be guided downward.

[0016] (8) In any one of the work vehicles (2) to (4) above, when the discharge pipe further includes a lower pipe connected to the external pipe, the lower pipe may include an external discharge port for discharging the drainage to the outside separately from the discharge port. Also in this case, the water in the discharge pipe generated by the condensation can be discharged from the external discharge port, and it is possible to suppress the accumulation of water in the discharge pipe. Moreover, since an external discharge port is provided in the lower pipe, while suppressing the discharged water from spreading to other parts of the discharge pipe, the discharged water can be guided downward.

[0017] (9) In any one of the work vehicles (1) to (8) above, when the vehicle body has a cabin surrounding the driver's seat behind the fuel cell and a bonnet covering the fuel cell, the riser pipe may be provided on the side of the bonnet. In this case, since the riser pipe is provided on the side of the bonnet, even if water vapor appears like white smoke from the discharge port, it is possible to suppress the occurrence of poor visibility due to water vapor, such as obstructing the view of the passengers or fogging the windows of the cabin.

[0018] (10) In any one of the work vehicles (1) to (8) above, when the vehicle body has a cabin surrounding the driver's seat behind the fuel cell, the riser pipe may be provided on the side of the cabin. In this case, since the riser pipe is provided on the side of the cabin, even if water vapor appears like white smoke from the discharge port, it is possible to suppress the occurrence of poor visibility due to water vapor, such as obstructing the view of the passengers or fogging the windows of the cabin.

[0019] (11) In any one of the work vehicles (1) to (8) above, when the vehicle body has a cabin surrounding the driver's seat behind the fuel cell, the riser pipe may be provided behind the cabin. In this case, since the riser pipe is provided behind the cabin, even if water vapor appears like white smoke from the discharge port, it is possible to suppress the occurrence of poor visibility due to water vapor, such as obstructing the view of the passengers or fogging the windows of the cabin.

[0020] [Details of the Embodiment] Hereinafter, preferred embodiments will be described with reference to the drawings. Note that at least a part of each of the embodiments described below may be arbitrarily combined.

[0021] [Regarding the Overall Configuration of the Work Vehicle of the First Embodiment] FIG. 1 is a right side view showing the whole of a work vehicle 1 according to a first embodiment. FIG. 2 is a front view of the work vehicle 1. FIG. 3 is a perspective view showing the skeletal structure of the work vehicle 1. As shown in FIGS. 1 and 2, the work vehicle 1 is a vehicle used for agricultural work, specifically a tractor. However, the work vehicle 1 is not limited to a tractor, and may be a moving body such as an agricultural machine, a construction machine, and a utility vehicle.

[0022] The work vehicle 1 includes a vehicle body 11, a traveling device 12 that supports the vehicle body 11, and the like. The vehicle body 11 includes a chassis 41, a bonnet 34, a cover 111, a driver's seat 15, a cabin 16, and a fender for the rear wheel 12B. More specifically, on the chassis 41 of the vehicle body 11, a bonnet 34, a cover 111, and a driver's seat 15 (cabin 16) are arranged in order from the front to the rear.

[0023] The work vehicle 1 further includes a tank unit 21, a fuel cell module (FC module) 24, a battery unit 30, and an electric motor 31 (see FIG. 3. Hereinafter, also referred to as "motor 31"). The work vehicle 1 has an FC module 24 which is a power generation system (FC power generation system) using a fuel cell. The work vehicle 1 travels using the electric power from the FC power generation system as an energy source. Note that the FC power generation system of this embodiment generates electric power using hydrogen. The FC power generation system may generate electric power using methane or carbon monoxide (CO).

[0024] The FC module 24 includes a fuel cell stack. The fuel cell stack (FC stack) has a stacked structure in which a plurality of fuel cells (single cells) are stacked. The plurality of single cells are connected in series so as to obtain a desired voltage. Hydrogen as fuel and air (oxygen) are supplied to the FC stack. The FC module 24 includes a compressor and a pump for supplying hydrogen and air to the FC stack. The FC stack generates electric power by an electrochemical reaction caused by hydrogen and air.

[0025] The FC module 24 is mounted in front of the driver's seat 15 in the chassis 41. A first radiator (not shown) is mounted in front of the FC module 24 in the chassis 41. Also, a second radiator (not shown) is mounted between the FC module 24 and the driver's seat 15 in the chassis 41. The bonnet 34 is a cover that covers the first radiator and the FC module 24. Also, the second radiator is covered by a cover 111.

[0026] The tank unit 21 has a plurality of tanks inside for storing fuel. The fuel is in a liquid or gaseous state, such as hydrogen, methane, carbon monoxide (CO), etc. The fuel in this embodiment is hydrogen. The plurality of tanks 13 each store hydrogen gas. The work vehicle 1 has a hydrogen gas pipe 22. Hydrogen gas is filled into the hydrogen tanks of the tank unit 21 from a filling port (not shown) provided at the end of the pipe 22. The hydrogen in the hydrogen tanks is supplied to the FC module 24 through the pipe 22. The battery unit 30 is mounted on the side of the chassis 41 and below the cabin 16. The battery unit 30 stores the electric power output from the FC module 24.

[0027] The cabin 16 surrounds the driver's seat 15 behind the FC module 24. The cabin 16 has front pillars, rear pillars, and a roof. The front pillars are arranged on the left and right sides in front of the driver's seat 15, and the rear pillars are arranged on the left and right sides behind the driver's seat 15. The cabin 16 has windows on the front, left and right sides, and rear. The work vehicle 1 may have a canopy or a rollover protective structure (ROPS) instead of the cabin 16. When the work vehicle 1 does not have the cabin 16, the tank unit 21 is arranged above the driver's seat 15 by a mounting frame 17 described later.

[0028] The traveling device 12 is provided on the chassis 41. The traveling device 12 includes a front wheel 12A and a rear wheel 12B. Both of these are arranged symmetrically with respect to the vehicle body 11. One or both of the front wheel 12A and the rear wheel 12B are driven by the rotational force output from the motor 31. The wheel (drive wheel) driven by the motor 31 may be a crawler (endless track).

[0029] The motor 31 is driven by the electric power discharged from the battery unit 30 or the electric power output from the FC module 24. Thereby, the work vehicle 1 travels using the electric power generated by the FC module 24.

[0030] As shown in FIG. 3, the chassis 41 has a front frame 32 and a transmission case 33. The front frame 32 is made of a steel frame having a long shape in the front-rear direction. The transmission case 33 is connected to the rear part of the front frame 32.

[0031] A mounting frame 17 is connected to the chassis 41. The mounting frame 17 is a frame for arranging the tank unit 21 above the cabin 16. The mounting frame 17 includes a ceiling frame 17A, a plurality of pillars 17B, and a pair of left and right reinforcing frames 17C. The ceiling frame 17A has a substantially rectangular shape with the front-rear direction being longer than the left-right direction. The plurality of pillars 17B support the ceiling frame 17A from below. The pair of reinforcing frames 17C are provided on the left and right of the front end portion of the ceiling frame 17A.

[0032] The tank unit 21 is connected to the ceiling frame 17A in a horizontally placed state. As shown in FIG. 1, the ceiling frame 17A is at a position higher than the roof of the cabin 16. Therefore, the tank unit 21 is arranged above the roof of the cabin 16. The reinforcing frame 17C is a reinforcing diagonal member that slopes downward from the front end of the ceiling frame 17A to the front frame 32. Therefore, the rigidity of the mounting frame 17 in the front-rear direction is enhanced as compared with the case where the ceiling frame 17A and the tank unit 21 are supported only by the pillar 17B.

[0033] A support frame 37 for supporting the battery unit 30 on the vehicle body 11 is provided on the chassis 41 of the work vehicle 1. Specifically, a motor 31 is mounted on the front frame 32 of the chassis 41, and the support frame 37 is attached to the portion of the front frame 32 corresponding to the motor 31. The support frame 37 is made of, for example, a metal frame member and is attached in a cantilever state so as to protrude to the right from the front frame 32.

[0034] The transmission case 33 located behind the motor 31 has a power transmission mechanism inside. The power transmission mechanism includes a transmission, a clutch, and a differential gear, and decelerates or accelerates the rotation of the output shaft of the motor 31 and transmits it to the traveling device 12. In addition, the power transmission mechanism includes a branch mechanism that outputs a part of the power of the motor 31 to a PTO shaft (not shown). The PTO shaft is an output shaft that protrudes rearward from the transmission case 33.

[0035] A connecting device 44 (see FIG. 1), which is constituted by, for example, a three-point link mechanism, for connecting a work device for performing a desired agricultural work to the rear of the vehicle body 11 is attached to the transmission case 33.

[0036] 〔Regarding the exhaust pipe〕 As shown in FIGS. 1 and 2, the work vehicle 1 of the present embodiment includes an exhaust pipe 50. The exhaust pipe 50 has a function of discharging the exhaust from the FC module 24 to the outside of the vehicle body 11. The exhaust from the FC module 24 includes unreacted air (oxygen), unreacted hydrogen, and drainage generated by an electrochemical reaction.

[0037] FIG. 4 is a perspective view showing the discharge pipe 50. The discharge pipe 50 extends from the FC module 24 mounted inside the bonnet 34 (vehicle body 11) across to the outside of the vehicle body 11. The discharge pipe 50 is formed using a metal pipe made of stainless steel, aluminum alloy, or the like.

[0038] The discharge pipe 50 includes a riser pipe 52, an external pipe 54, and a discharge port 56. The riser pipe 52 is provided on the right side of the vehicle body 11 (bonnet 34) (see FIGS. 1 and 2). The riser pipe 52 extends along the vertical direction. The riser pipe 52 is fixed to, for example, a pillar 17B located in the right front of the cabin 16. The discharge port 56 is provided at the upper end of the riser pipe 52. The discharge port 56 is an opening for discharging the discharge (waste water) from the FC module 24 to the outside. Also, the riser pipe 52 guides the discharge (waste water) upward and discharges the guided discharge (waste water) from the discharge port 56.

[0039] The external pipe 54 connects the riser pipe 52 and the FC module 24. The external pipe 54 extends from the right side surface of the vehicle body 11 (bonnet 34) to the outside of the vehicle body 11 (see FIG. 2). The external pipe 54 has an external tip portion 54a and an internal tip portion 54b. The external tip portion 54a is exposed outside the vehicle body 11. The internal tip portion 54b is located inside the vehicle body 11. The internal tip portion 54b is connected to the FC module 24. The internal tip portion 54b has an inlet 55. The discharge from the FC module 24 is introduced into the inlet 55. The external tip portion 54a is connected to the lower end of the riser pipe 52.

[0040] The riser pipe 52 has a riser pipe body 52a and an upper pipe 52b. The riser pipe body 52a is a portion that extends along the vertical direction from the external tip portion 54a of the external pipe 54. The riser pipe body 52a has a lower end portion 52a1 and an upper end portion 52a2. On the side of the lower end portion 52a1, the external tip portion 54a is connected.

[0041] The upper pipe 52b is provided at the upper end portion 52a2. The upper pipe 52b extends horizontally from the upper end portion 52a2. Also, the upper pipe 52b extends in a direction away from the vehicle body 11. More specifically, it extends in the right direction when viewed from the vehicle body 11. Therefore, the upper pipe 52b extends in the opposite direction of the vehicle body 11. The discharge port 56 is provided at the tip of the upper pipe 52b. The discharge port 56 is located at approximately the same height as the roof of the cabin 16. Therefore, the discharge port 56 is located above the upper surface of the bonnet 34.

[0042] The discharge material introduced from the introduction port 55 passes through the riser pipe 52 from the external pipe 54 and is discharged from the discharge port 56. As described above, the discharge material includes drainage. Here, the drainage includes water (liquid) in addition to water vapor. The discharge port 56 of the present embodiment is at approximately the same height as the roof of the cabin 16. Therefore, the discharge port 56 is arranged above the line of sight of the occupant in the driver's seat 15. Furthermore, the riser pipe 52 is provided on the right side of the bonnet 34. Therefore, even if the drainage (water vapor) appears like white smoke from the discharge port 56, it is possible to suppress the occurrence of visual impairment caused by water vapor, such as obstructing the occupant's field of vision or fogging the window of the cabin 16.

[0043] Also, since the discharge pipe 50 of the present embodiment has the upper pipe 52b and the discharge port 56 is provided in the upper pipe 52b, the direction of the drainage (water vapor) discharged from the discharge port 56 can be made horizontal. As a result, the direction of the water vapor can be directed away from the vehicle body 11, and the occurrence of visual impairment caused by water vapor can be effectively suppressed.

[0044] In addition, the upper pipe 52b may extend horizontally from a middle portion of the riser pipe main body 52a. Also in this case, it is possible to effectively suppress the occurrence of poor visibility due to water vapor. The middle portion of the riser pipe main body 52a is a portion between the upper end portion 52a2 and the lower end portion 52a1 of the riser pipe main body 52a.

[0045] Further, the discharge pipe 50 of the present embodiment has a lower pipe 58. FIG. 5 is an enlarged cross-sectional view of a portion of the lower pipe 58 of the discharge pipe 50. The lower pipe 58 is connected to the lower end portion 52a1 of the riser pipe main body 52a. The lower pipe 58 extends downward so as to extend from the lower end portion 52a1. Therefore, the riser pipe 52, the outer pipe 54, and the lower pipe 58 that are connected to each other have a T shape.

[0046] An external discharge port 60 is provided at the lower tip of the lower pipe 58. The external discharge port 60 is an opening for discharging drainage to the outside separately from the discharge port 56. Therefore, the discharge pipe 50 has three openings. The three openings, the inlet 55, the discharge port 56, and the external discharge port 60 communicate with each other. Among the drainage, water vapor is mainly discharged from the discharge port 56. On the other hand, water (liquid) in the drainage is discharged from the external discharge port 60. The water vapor is cooled when passing through the discharge pipe 50. At this time, the water vapor condenses and water (liquid) is generated in the discharge pipe 50. The external discharge port 60 discharges the water in the discharge pipe 50 generated by the condensation of water vapor to the outside.

[0047] As described above, in the present embodiment, since the discharge pipe 50 has the external discharge port 60, the water in the discharge pipe 50 generated by the condensation of water vapor can be discharged from the external discharge port 60, and the accumulation of water in the discharge pipe 50 can be suppressed. Further, in the present embodiment, since the external discharge port 60 is provided in the lower pipe 58, it is possible to suppress the discharged water from being transmitted to other parts of the discharge pipe 50, and at the same time, it is possible to guide the discharged water downward. Furthermore, it is possible to guide and discharge the water discharged to a position that does not affect the vehicle body 11 and the surroundings of the vehicle body 11.

[0048] [Regarding Other Embodiments] FIG. 6 is a right side view showing the entire working vehicle 1 according to the second embodiment. The working vehicle 1 of the present embodiment is different from the first embodiment in that the riser pipe 52 of the exhaust pipe 50 is provided on the side of the cabin 16. The riser pipe 52 of the present embodiment is provided on the side of the right front portion of the cabin 16. Also in this case, since the discharge port 56 is located on the right side of the cabin 16, even if water vapor appears like white smoke from the discharge port 56, it is possible to suppress the occurrence of visual impairment due to water vapor, such as obstructing the view of the occupant or fogging the window of the cabin 16.

[0049] FIG. 7 is a rear view of the working vehicle 1 according to the third embodiment. The working vehicle 1 of the present embodiment is different from the first embodiment in that the riser pipe 52 of the exhaust pipe 50 is provided behind the cabin 16. The riser pipe 52 of the present embodiment is fixed to, for example, the beam portion 17D. The beam portion 17D is a member that connects the lower ends of a pair of pillars 17B located behind the cabin 16.

[0050] In the present embodiment, since the riser pipe 52 is provided behind the cabin 16, the discharge port 56 is located behind the cabin 16. Therefore, even if water vapor appears like white smoke from the discharge port 56, it is possible to suppress the occurrence of visual impairment due to water vapor, such as obstructing the view of the occupant or fogging the window of the cabin 16.

[0051] FIG. 8A is a partial cross-sectional view of the exhaust pipe 50 according to the fourth embodiment. The exhaust pipe 50 of the present embodiment is different from the first embodiment in that the lower pipe 62 is connected to the outer pipe 54.

[0052] The lower pipe 62 extends downward from the outer pipe 54. The height position of the tip of the lower pipe 62 is substantially the same as the height position of the tip of the lower pipe 58. An external discharge port 64 is provided at the lower tip of the lower pipe 62. Therefore, the discharge pipe 50 has four openings. The four openings, namely the introduction port 55, the discharge port 56, the external discharge port 60, and the external discharge port 64, communicate with each other.

[0053] In this embodiment, the water generated by the condensation of water vapor is discharged from either the external discharge port 60 or the external discharge port 64 on the upstream side of the external discharge port 60. Therefore, the water that could not be discharged by the upstream external discharge port 64 can be discharged by the external discharge port 60. Thereby, it is possible to effectively suppress the accumulation of water in the discharge pipe 50.

[0054] FIG. 8B is a partial cross-sectional view of the discharge pipe 50 according to a modified example of the fourth embodiment. The discharge pipe 50 of this modified example is different from the fourth embodiment in that it does not have the lower pipe 58 and the external discharge port 60. The end face of the lower end portion 52a1 of the riser pipe main body 52a is blocked by the lid member 52a3. Even in this case, the water generated by the condensation of water vapor is discharged from the external discharge port 64.

[0055] FIG. 9A is a partial cross-sectional view of the discharge pipe 50 according to the fifth embodiment. The discharge pipe 50 of this embodiment is different from the first embodiment in that an external discharge port 60 is provided at the lower end portion 52a1 of the riser pipe main body 52a and an external discharge port 64 is provided in the external pipe 54.

[0056] The discharge pipe 50 of this embodiment does not have the lower pipe 58, and an external discharge port 60 is provided in the riser pipe 52. Therefore, the riser pipe 52 and the external pipe 54 that are connected to each other have an L shape. Also in this embodiment, the water generated by the condensation of water vapor is discharged from either the external discharge port 60 or the external discharge port 64 on the upstream side of the external discharge port 60. Thereby, it is possible to effectively suppress the accumulation of water in the discharge pipe 50. In addition, in this embodiment, a configuration without a lower pipe is shown. However, a lower pipe 58 may be provided only at the lower end portion 52a1 of the riser pipe main body 52a, and an external discharge port 60 may be provided at the tip of the lower pipe 58. Alternatively, a lower pipe 58 may be provided only in the external pipe 54, and an external discharge port 64 may be provided at the tip of the lower pipe 62.

[0057] FIG. 9B is a partial cross-sectional view of the discharge pipe 50 according to a modification of the fifth embodiment. The discharge pipe 50 of this modification is different from the fifth embodiment in that it does not have an external discharge port 60. The end face of the lower end portion 52a1 of the riser pipe main body 52a is closed by a lid member 52a3. Even in this case, the water generated by the condensation of the water vapor is discharged from the external discharge port 64.

[0058] [Others] It should be considered that all the embodiments disclosed this time are illustrative and not restrictive in any way. For example, in each of the above embodiments, the case where the external discharge ports 60 and 64 are provided in the discharge pipe 50 is illustrated. However, a configuration without the external discharge ports 60 and 64 may also be adopted. In this case, the discharge material introduced from the introduction port 55 is discharged only from the discharge port 56. Also, in each of the above embodiments, the case where the external discharge ports 60 and 64 are provided at the lowermost part of the discharge pipe 50 is illustrated. However, the external discharge ports 60 and 64 may be provided below the discharge port 56.

[0059] The scope of the present invention is not as described above, but is shown by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

Explanation of Reference Numerals

[0060] 1 Work vehicle 11 Vehicle body 12 Travel device 12A Front wheel 12B Rear wheel 15 Driver's seat 16 Cabin 17 Mounting Frame 17A Ceiling Frame 17B Pillar 17C Reinforcing Frame 17D Beam Portion 21 Tank Unit 22 Pipe 24 FC Module 30 Battery Unit 31 Electric Motor 32 Front Frame 33 Transmission Case 34 Bonnet 37 Support Frame 41 Chassis 44 Connecting Device 50 Discharge Pipe 52 Upright Pipe 52a Upright Pipe Body 52a1 Lower End Portion 52a2 Upper End Portion 52a3 Cover Member 52b Upper Pipe 54 External Pipe 54a External Tip 54b Internal Tip 55 Inlet 56 Outlet 58 Lower Pipe 60 External Discharge Port 62 Lower Pipe 64 External Discharge Port 111 Cover

Claims

1. A fuel cell, a vehicle body on which the fuel cell is mounted, and a discharge pipe having a discharge port for discharging the drainage from the fuel cell to the outside, wherein the discharge pipe includes a riser pipe that guides the drainage upward and discharges the guided drainage from the discharge port in a work vehicle.

2. The work vehicle according to claim 1, wherein the discharge pipe further includes an external pipe that extends from the vehicle body to the outside and is connected to the riser pipe.

3. The work vehicle according to claim 2, wherein the riser pipe includes an upper pipe that extends horizontally from the upper end or a middle portion, and the discharge port is provided in the upper pipe.

4. The work vehicle according to claim 3, wherein the upper pipe extends in a direction away from the vehicle body.

5. The work vehicle according to claim 1, wherein the discharge pipe is provided in the riser pipe and further includes an external discharge port for discharging the drainage to the outside separately from the discharge port, and the external discharge port is located below the discharge port.

6. The work vehicle according to claim 2, wherein the discharge pipe is provided in the external pipe and further includes an external discharge port for discharging the drainage to the outside separately from the discharge port, and the external discharge port is located below the discharge port.

7. The work vehicle according to claim 1, wherein the discharge pipe further includes a lower pipe connected to the riser pipe, and the lower pipe includes an external discharge port for discharging the drainage to the outside separately from the discharge port.

8. The work vehicle according to claim 2, wherein the discharge pipe further includes a lower pipe connected to the external pipe, and the lower pipe includes an external discharge port for discharging the drainage to the outside separately from the discharge port.

9. The vehicle body includes a cabin surrounding the driver's seat behind the fuel cell, and a bonnet covering the fuel cell, and the riser pipe is provided on the side of the bonnet.

10. The work vehicle according to any one of claims 1 to 8, wherein the vehicle body has a cabin surrounding the driver's seat behind the fuel cell, and the riser pipe is provided on the side of the cabin.

11. The work vehicle according to any one of claims 1 to 8, wherein the vehicle body has a cabin surrounding the driver's seat behind the fuel cell, and the riser pipe is provided behind the cabin. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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