Work vehicle

Abstract

A work vehicle 1 according to the present disclosure comprises: an FC module 24; a vehicle body 11 on which the FC module 24 is mounted; and a discharge pipe 50 which has a discharge port 56 that discharges waste water from the FC module 24 to the outside. The discharge pipe 50 includes an upright pipe 52 which guides waste water upwards and discharges the guided waste water from the discharge port 56.

Description

Work vehicles

[0001] The present disclosure relates to work vehicles.

[0002] Patent Document 1 discloses a work vehicle equipped with a motor and a fuel cell that uses hydrogen as fuel. The fuel cell generates electricity through an electrochemical reaction between hydrogen and air (oxygen). The generated electricity is used to drive the motor. The work vehicle travels using the rotational force of the motor as driving force. This application claims priority to Japanese Application No. 2023-219066, filed December 26, 2023, and incorporates all of the contents of that Japanese application by reference.

[0003] JP 2023-13186 A

[0004] The work vehicle disclosed herein includes a fuel cell, a vehicle body on which the fuel cell is mounted, and a discharge pipe having an outlet for discharging wastewater from the fuel cell to the outside. The discharge pipe includes an upright pipe that guides the wastewater upward and discharges the guided wastewater from the outlet.

[0005] FIG. 1 is a right side view showing the entire work vehicle according to the first embodiment. FIG. 2 is a front view of the work vehicle. FIG. 3 is a perspective view showing the framework structure of the work vehicle. FIG. 4 is a perspective view showing a discharge pipe. FIG. 5 is an enlarged cross-sectional view of a lower pipe portion of the discharge pipe. FIG. 6 is a right side view showing the entire work vehicle according to the second embodiment. FIG. 7 is a rear view of a work vehicle according to the third embodiment. FIG. 8A is a partial cross-sectional view of a discharge pipe according to a fourth embodiment. FIG. 8B is a partial cross-sectional view of a discharge pipe according to a modified example of the fourth embodiment. FIG. 9A is a partial cross-sectional view of a discharge pipe according to a fifth embodiment. FIG. 9B is a partial cross-sectional view of a discharge pipe according to a modified example of the fifth embodiment.

[0006] [Problem to be Solved by the Present Disclosure] The exhaust (exhaust gas) emitted from a fuel cell contains water produced by an electrochemical reaction. Therefore, when the exhaust is released to the outside, the wastewater (water vapor) contained in the exhaust may appear as white smoke. As a result, the water vapor that appears as white smoke can obstruct the visibility of occupants of work vehicles. Therefore, a technology that can suppress the occurrence of poor visibility due to water vapor from exhaust gas is desired.

[0007] [Effects of the Present Disclosure] According to the present disclosure, it is possible to suppress the occurrence of poor visibility due to water vapor.

[0008] First, the contents of the embodiments will be listed and explained. [Outline of the Embodiments] (1) A 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 wastewater from the fuel cell to the outside. The discharge pipe includes an upright pipe that guides the wastewater upward and discharges the guided wastewater from the discharge port.

[0009] According to the above configuration, the wastewater (water vapor) is guided upward by the riser pipe and discharged from the exhaust port. Therefore, for example, if the riser pipe is arranged so that the exhaust port is positioned above the eye level of the occupants of the work vehicle, even if the wastewater (water vapor) appears from the exhaust port as white smoke, it can be prevented from obstructing the occupants' view or fogging up the cabin windows, thereby preventing poor visibility due to water vapor.

[0010] (2) In the work vehicle of (1) above, the exhaust pipe may further include an external pipe extending from the vehicle body to the outside and connected to the riser pipe. In this case, since the riser pipe is disposed outside the vehicle body, for example, it is possible to prevent water vapor discharged from the exhaust port from entering the cabin of the work vehicle. As a result, it is possible to effectively prevent poor visibility caused by water vapor.

[0011] (3) In the work vehicle of (1) or (2) above, if the upright pipe has an upper pipe extending horizontally from an upper end or a middle portion thereof, the outlet may be provided in the upper pipe. In this case, the direction of the wastewater (water vapor) discharged from the outlet can be made horizontal, and the water vapor can be directed in a direction that does not affect visibility.

[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 exhausted water vapor can be directed in a direction away from the vehicle body.

[0013] (5) In the work vehicle of any one of (1) to (4) above, if the discharge pipe is provided in the upright pipe and further includes an external discharge outlet that discharges the wastewater to the outside, separate from the discharge outlet, the external discharge outlet may be located below the discharge outlet. The wastewater includes water vapor and water (liquid) that is formed when the water vapor is cooled and condensed within the discharge pipe. In contrast, since the present disclosure includes an external discharge outlet, water in the discharge pipe that is generated by condensation of the water vapor can be discharged from the external discharge outlet, thereby preventing water from accumulating within the discharge pipe.

[0014] (6) In the work vehicle of any one of (2) to (4) above, when the discharge pipe is provided in the external pipe and further includes an external discharge outlet that discharges the wastewater to the outside, separate from the discharge outlet, the external discharge outlet may be located below the discharge outlet. In this case as well, water in the discharge pipe that is generated by condensation of water vapor in the discharge pipe can be discharged from the external discharge outlet, thereby preventing water from accumulating in the discharge pipe.

[0015] (7) In the work vehicle according to any one of (1) to (6) above, when the discharge pipe further includes a lower pipe connected to the upright pipe, the lower pipe may include an external discharge outlet, separate from the discharge outlet, for discharging the wastewater to the outside. In this case, too, water generated in the discharge pipe due to condensation can be discharged from the external discharge outlet, thereby preventing water from accumulating in the discharge pipe. Furthermore, since the external discharge outlet is provided in the lower pipe, the discharged water can be guided downward while preventing it from spreading to other parts of the discharge pipe.

[0016] (8) In the work vehicle according to any one of (2) to (4) above, if the discharge pipe further includes a lower pipe connected to the external pipe, the lower pipe may include an external outlet separate from the outlet for discharging the wastewater to the outside. In this case, water generated in the discharge pipe due to condensation can be discharged from the external outlet, thereby preventing water from accumulating in the discharge pipe. Furthermore, since the external outlet is provided in the lower pipe, the discharged water can be guided downward while preventing it from spreading to other parts of the discharge pipe.

[0017] (9) In the work vehicle of any one of (1) to (8) above, if the vehicle body has a cabin surrounding a driver's seat behind the fuel cell and a hood covering the fuel cell, the riser pipe may be provided on the side of the hood. In this case, because the riser pipe is provided on the side of the hood, even if water vapor appears as white smoke from the exhaust port, it is possible to prevent the obstruction of the visibility of passengers and the fogging of cabin windows, and to prevent poor visibility due to water vapor.

[0018] (10) In the work vehicle of any one of (1) to (8) above, if 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, because the riser pipe is provided on the side of the cabin, even if water vapor appears as white smoke from the exhaust port, it is possible to prevent the obstruction of the visibility of passengers and the fogging of cabin windows, and to prevent poor visibility due to water vapor.

[0019] (11) In the work vehicle of any one of (1) to (8) above, if the vehicle body has a cabin surrounding a driver's seat behind the fuel cell, the riser pipe may be provided behind the cabin. In this case, because the riser pipe is provided behind the cabin, even if water vapor appears as white smoke from the exhaust port, it is possible to prevent the obstruction of the visibility of passengers and the fogging of cabin windows, and to prevent poor visibility due to water vapor.

[0020] [Details of the embodiment] Preferred embodiments will now be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any desired manner.

[0021] [Overall Configuration of the Work Vehicle of the First Embodiment] Fig. 1 is a right side view showing the entire work vehicle 1 according to the 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 mobile body such as agricultural machinery, construction machinery, or 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 hood 34, a cover 111, a driver's seat 15, a cabin 16, and fenders for the rear wheels 12B, etc. More specifically, the hood 34, the cover 111, and the driver's seat 15 (cabin 16) are arranged on the chassis 41 of the vehicle body 11 in this 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 the FC module 24, which is a fuel cell-based power generation system (FC power generation system). The work vehicle 1 travels using 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 also 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 multiple fuel cell units (single cells) are stacked. The multiple single cells are connected in series to obtain the desired voltage. The FC stack is supplied with hydrogen as fuel and air (oxygen). The FC module 24 is equipped with a compressor and a pump for supplying hydrogen and air to the FC stack. The FC stack generates electricity through an electrochemical reaction between the hydrogen and air.

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

[0026] The tank unit 21 has multiple tanks therein for storing fuel. The fuel may be liquid or gas, such as hydrogen, methane, or carbon monoxide (CO). In this embodiment, the fuel is hydrogen. Each of the multiple tanks 13 stores hydrogen gas. The work vehicle 1 has hydrogen gas piping 22. Hydrogen gas is filled into the hydrogen tank of the tank unit 21 from a fill port (not shown) provided at the end of the piping 22. Hydrogen in the hydrogen tank is supplied to the FC module 24 through the piping 22. The battery unit 30 is mounted on the side of the chassis 41, below the cabin 16. The battery unit 30 stores the 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 located on the left and right sides in front of the driver's seat 15, and the rear pillars are located 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 roofpan instead of the cabin 16. If the work vehicle 1 does not have a cabin 16, the tank unit 21 is placed above the driver's seat 15 by a mounting frame 17, which will be described later.

[0028] The traveling device 12 is provided on the chassis 41. The traveling device 12 includes front wheels 12A and rear wheels 12B, both of which are arranged symmetrically on the left and right sides of the vehicle body 11. One or both of the front wheels 12A and the rear wheels 12B are driven by a rotational force output from a motor 31. The wheels (drive wheels) driven by the motor 31 may be crawlers (crawlers).

[0029] The motor 31 is driven by power discharged from the battery unit 30 or power output from the FC module 24. This allows the work vehicle 1 to travel using power generated by the FC module 24.

[0030] 3, the chassis 41 has a front frame 32 and a transmission case 33. The front frame 32 is a steel frame that is long in the front-to-rear direction. The transmission case 33 is connected to the rear of the front frame 32.

[0031] A mounting frame 17 is connected to the chassis 41. The mounting frame 17 is a frame for disposing the tank unit 21 above the cabin 16. The mounting frame 17 includes a ceiling frame 17A, multiple pillars 17B, and a pair of left and right reinforcing frames 17C. The ceiling frame 17A has a substantially rectangular shape that is longer in the front-to-rear direction than in the left-to-right direction. The multiple pillars 17B support the ceiling frame 17A from below. The pair of reinforcing frames 17C are provided on the left and right sides of the front end 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 Figure 1, the ceiling frame 17A is located higher than the roof of the cabin 16. Therefore, the tank unit 21 is disposed 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 fore-and-aft direction is strengthened compared to when the ceiling frame 17A and the tank unit 21 are supported only by the pillars 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, the motor 31 is mounted on the front frame 32 of the chassis 41, and the support frame 37 is attached to a 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 cantilevered state so as to protrude to the right from the front frame 32.

[0034] The transmission case 33, located rearward of the motor 31, houses a power transmission mechanism therein. The power transmission mechanism includes a transmission, a clutch, and a differential gear, and transmits the rotation of the output shaft of the motor 31 to the traveling device 12 while slowing or accelerating the rotation. The power transmission mechanism also includes a branching mechanism that outputs a portion 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 coupling device 44 (see FIG. 1), which is configured by, for example, a three-point link mechanism, is attached to the transmission case 33 for coupling a work implement for performing a desired agricultural task to the rear of the vehicle body 11 .

[0036] 1 and 2, the work vehicle 1 of this embodiment is equipped with an exhaust pipe 50. The exhaust pipe 50 has the function of discharging 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 wastewater produced by the electrochemical reaction.

[0037] 4 is a perspective view showing the exhaust pipe 50. The exhaust pipe 50 extends from the FC module 24 mounted inside the hood 34 (vehicle body 11) to the outside of the vehicle body 11. The exhaust 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 (hood 34) (see FIGS. 1 and 2). The riser pipe 52 extends in the vertical direction. The riser pipe 52 is fixed, for example, to a pillar 17B located on the front right side 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 discharged matter (wastewater) from the FC module 24 to the outside. The riser pipe 52 also guides the discharged matter (wastewater) upward and discharges the guided discharged matter (wastewater) from the discharge port 56.

[0039] The external pipe 54 connects the standpipe 52 and the FC module 24. The external pipe 54 extends from the right side surface of the vehicle body 11 (hood 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 to the outside of 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. Exhaust from the FC module 24 is introduced into the inlet 55. The external tip portion 54a is connected to the lower end of the standpipe 52.

[0040] The riser pipe 52 has a riser pipe main body 52a and an upper pipe 52b. The riser pipe main body 52a is a portion that extends in the vertical direction from the outer tip end 54a of the outer pipe 54. The riser pipe main body 52a has a lower end 52a1 and an upper end 52a2. The outer tip end 54a is connected to the side surface of the lower end 52a1.

[0041] The upper pipe 52b is provided at the upper end 52a2. The upper pipe 52b extends horizontally from the upper end 52a2. The upper pipe 52b also extends in a direction away from the vehicle body 11. More specifically, the upper pipe 52b extends to the right as viewed from the vehicle body 11. Thus, the upper pipe 52b extends in the opposite direction from the vehicle body 11. The exhaust port 56 is provided at the tip of the upper pipe 52b. The exhaust port 56 is located at approximately the same height as the roof of the cabin 16. Thus, the exhaust port 56 is located above the top surface of the hood 34.

[0042] The exhaust introduced through the inlet 55 passes through the external pipe 54 and the riser pipe 52 and is discharged from the outlet 56. As described above, the exhaust includes wastewater. Note that the wastewater referred to here includes water (liquid) as well as water vapor. The outlet 56 in this embodiment is at approximately the same height as the roof of the cabin 16. Therefore, the outlet 56 is disposed above the eye level of the occupant in the driver's seat 15. Furthermore, the riser pipe 52 is provided on the right side of the hood 34. Therefore, even if the wastewater (water vapor) emerges as white smoke from the outlet 56, it is possible to prevent it from obstructing the occupant's visibility or fogging up the windows of the cabin 16, thereby suppressing poor visibility due to water vapor.

[0043] Furthermore, since the exhaust pipe 50 of this embodiment has the upper pipe 52b and the exhaust port 56 is provided in the upper pipe 52b, the direction of the wastewater (water vapor) discharged from the exhaust 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 poor visibility due to water vapor can be effectively suppressed.

[0044] The upper pipe 52b may extend horizontally from the middle of the upright pipe body 52a. In this case, the occurrence of poor visibility due to water vapor can also be effectively suppressed. The middle of the upright pipe body 52a is the section between the upper end 52a2 and the lower end 52a1 of the upright pipe body 52a.

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

[0046] An external discharge port 60 is provided at the lower end of the lower pipe 58. The external discharge port 60 is an opening that discharges wastewater to the outside, separate 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, are connected to one another. The water vapor in the wastewater is mainly discharged from the discharge port 56. Meanwhile, the water (liquid) in the wastewater is discharged from the external discharge port 60. The water vapor is cooled as it passes through the discharge pipe 50. At this time, the water vapor condenses, producing water (liquid) in the discharge pipe 50. The external discharge port 60 discharges water in the discharge pipe 50 that is produced by the condensation of the water vapor to the outside.

[0047] As described above, in this embodiment, the discharge pipe 50 has the external discharge port 60, so that water generated in the discharge pipe 50 due to condensation of water vapor can be discharged from the external discharge port 60, thereby preventing water from accumulating in the discharge pipe 50. Also, in this embodiment, the external discharge port 60 is provided in the lower pipe 58, so that the discharged water can be guided downward while preventing the discharged water from spreading to other parts of the discharge pipe 50. Furthermore, the discharged water can be guided and discharged to a position that does not affect the vehicle body 11 or the surrounding area of ​​the vehicle body 11.

[0048] [Regarding Other Embodiments] Figure 6 is a right side view showing the entire work vehicle 1 according to a second embodiment. The work vehicle 1 of this embodiment differs 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 this embodiment is provided on the side of the right front part of the cabin 16. Even in this case, because the exhaust outlet 56 is located on the right side of the cabin 16, even if water vapor emerges as white smoke from the exhaust outlet 56, it is possible to prevent the obstruction of the visibility of the occupants and the fogging up of the windows of the cabin 16, thereby preventing poor visibility due to water vapor.

[0049] 7 is a rear view of a work vehicle 1 according to a third embodiment. The work vehicle 1 of this embodiment differs from the first embodiment in that the riser pipe 52 of the discharge pipe 50 is provided behind the cabin 16. The riser pipe 52 of this embodiment is fixed to, for example, a 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 this embodiment, the riser pipe 52 is provided at the rear of the cabin 16, and therefore the exhaust port 56 is located at the rear of the cabin 16. Therefore, even if water vapor emerges as white smoke from the exhaust port 56, it is possible to prevent the water vapor from obstructing the visibility of passengers or fogging up the windows of the cabin 16, thereby preventing poor visibility due to the water vapor.

[0051] 8A is a partial cross-sectional view of a discharge pipe 50 according to a fourth embodiment. The discharge pipe 50 of this embodiment differs from that of the first embodiment in that a lower pipe 62 is connected to an outer pipe 54.

[0052] The lower pipe 62 extends downward from the external pipe 54. The height position of the tip of the lower pipe 62 is approximately 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. Thus, the discharge pipe 50 has four openings. The four openings, the inlet 55, the discharge port 56, the external discharge port 60, and the external discharge port 64, are in communication with one another.

[0053] In this embodiment, water generated by condensation of water vapor is discharged from either the external discharge port 60 or the external discharge port 64 located upstream of the external discharge port 60. Therefore, water that cannot be discharged from the upstream external discharge port 64 can be discharged from the external discharge port 60. This effectively prevents water from accumulating in the discharge pipe 50.

[0054] 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 differs from the fourth embodiment in that it does not have the lower pipe 58 or the external discharge port 60. The end face of the lower end portion 52a1 of the upright pipe main body 52a is closed by a lid member 52a3. Even in this case, water generated by condensation of water vapor is discharged through the external discharge port 64.

[0055] 9A is a partial cross-sectional view of the discharge pipe 50 according to the fifth embodiment. The discharge pipe 50 of this embodiment differs from the first embodiment in that an external discharge port 60 is provided at the lower end 52a1 of the upright 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 a lower pipe 58, and the riser pipe 52 is provided with an external discharge port 60. Therefore, the riser pipe 52 and the external pipe 54, which are connected to each other, have an L-shape. In this embodiment, too, water generated by condensation of water vapor is discharged from either the external discharge port 60 or an external discharge port 64 upstream of the external discharge port 60. This effectively prevents water from accumulating in the discharge pipe 50. Note that while this embodiment shows a configuration in which a lower pipe is not provided, the lower pipe 58 may be provided only at the lower end 52a1 of the riser pipe main body 52a, and the external discharge port 60 may be provided at the tip of the lower pipe 58. Alternatively, the lower pipe 58 may be provided only at the external pipe 54, and the external discharge port 64 may be provided at the tip of the lower pipe 62.

[0057] 9B is a partial cross-sectional view of a discharge pipe 50 according to a modification of the fifth embodiment. The discharge pipe 50 of this modification differs 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 upright pipe main body 52a is closed by a lid member 52a3. Even in this case, water generated by condensation of water vapor is discharged from the external discharge port 64.

[0058] [Others] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. For example, in the above-described embodiments, the external exhaust ports 60, 64 are provided in the exhaust pipe 50. However, the external exhaust ports 60, 64 may not be provided. In this case, the waste introduced through the inlet 55 is discharged only through the exhaust port 56. Furthermore, in the above-described embodiments, the external exhaust ports 60, 64 are provided at the lowest part of the exhaust pipe 50. However, the external exhaust ports 60, 64 may be provided below the exhaust port 56.

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

[0060] REFERENCE SIGNS LIST 1 Work vehicle 11 Vehicle body 12 Traveling device 12A Front wheel 12B Rear wheel 15 Driver's seat 16 Cabin 17 Mounting frame 17A Ceiling frame 17B Pillar 17C Reinforcement frame 17D Beam 21 Tank unit 22 Piping 24 FC module 30 Battery unit 31 Electric motor 32 Front frame 33 Transmission case 34 Bonnet 37 Support frame 41 Chassis 44 Coupling device 50 Discharge pipe 52 Stand pipe 52a Stand pipe main body 52a1 Lower end 52a2 Upper end 52a3 Cover member 52b Upper pipe 54 External pipe 54a External tip 54b Internal tip 55 Inlet 56 Discharge outlet 58 Lower pipe 60 External discharge outlet 62 Lower pipe 64 External discharge port 111 Cover

Claims

1. A work vehicle comprising 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.

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 an upper end or an intermediate 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 further includes an external discharge port that is provided in the riser pipe and discharges 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 further includes an external discharge port that is provided in the external pipe and discharges 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 that discharges 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 that discharges the drainage to the outside separately from the discharge port.

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

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

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

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