Work vehicles

Abstract

For conventional work vehicles such as tractors, achieving a component layout with good body balance characteristics is not always easy. More specifically, achieving a component layout with good body balance characteristics for relatively heavy units such as hydrogen tanks and fuel cells is not always easy. [Solution] A tractor equipped with a seat 11, comprising a hydrogen tank 20 for storing hydrogen, a fuel cell 30 for generating electricity using the hydrogen in the hydrogen tank 20, a battery 40 for storing the electricity generated by the fuel cell 30, and a motor 50 for generating power using the electricity stored in the battery 40, wherein the hydrogen tank 20 is located below the seat 11, and the fuel cell 30 is located behind the hydrogen tank 20.

Description

Technical Field

[0001] The present invention relates to a work vehicle such as a tractor.

Background Art

[0002] There is known a work vehicle including a traveling vehicle body that can travel according to an external command and can mount a working device, a drive device provided on the traveling vehicle body and generating a driving force of the traveling vehicle body, a plurality of tanks storing gas which is an energy source of the driving force, and a control device that controls the traveling of the traveling vehicle body autonomously or according to an external command. The drive device includes a fuel cell that generates power using the gas in the plurality of tanks, a battery that stores the power generated by the fuel cell, and a drive motor that is driven by the power generated by the fuel cell. The fuel cell is disposed on either the front or the rear of the traveling vehicle body, and at least a part of the plurality of tanks is disposed on the front or the rear of the traveling vehicle body where the fuel cell is not disposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the inventor has noticed that it is not always easy to achieve a component layout of a unit with good vehicle balance characteristics for a conventional work vehicle such as a tractor.

[0005] More specifically, the inventor has noticed that it is not always easy to perform a component layout of a relatively heavy unit such as a hydrogen tank and a fuel cell with good vehicle balance characteristics.

[0006] The present invention aims to provide a work vehicle that can arrange the components of relatively heavy units, such as hydrogen tanks and fuel cells, with good vehicle body balance characteristics, taking into consideration the conventional problems described above. [Means for solving the problem]

[0007] The first aspect of the present invention is a work vehicle equipped with seats, A hydrogen tank for storing hydrogen, A fuel cell that generates electricity using the hydrogen in the hydrogen tank, A battery for storing the electricity generated by the fuel cell, A motor that generates power using the stored energy of the aforementioned battery, It is equipped with, The hydrogen tank is located below the seat. The aforementioned fuel cell is located behind the hydrogen tank, making it a work vehicle.

[0008] The second aspect of the present invention includes a transmission case for changing the speed of the power of the motor, The hydrogen tank is located on the upper side of the front of the transmission case. The first work vehicle of the present invention is characterized in that the fuel cell is located on the upper side of the rear of the transmission case.

[0009] The third invention is equipped with a rear wheel fender that covers the rear wheel, An air cleaner for supplying oxygen to the fuel cell is provided inside the rear wheel fender. A second work vehicle of the present invention is characterized in that a hydrogen filling port for supplying hydrogen to the hydrogen tank is provided on the outer surface of the rear wheel fender.

[0010] The fourth aspect of the present invention is a cooling water path for circulating cooling water for cooling at least the fuel cell, the battery and the motor, A radiator that dissipates heat from the cooling water in the aforementioned cooling water path, It is equipped with, A third work vehicle of the present invention is characterized in that the battery, motor, and radiator are located at the front of the vehicle body.

[0011] The fifth aspect of the present invention is a work vehicle according to the fourth aspect of the present invention, characterized in that the radiator is positioned in front of the battery and the motor.

[0012] The sixth aspect of the present invention is a work vehicle according to the fifth aspect of the present invention, characterized in that the water outlet for discharging fuel cell wastewater from the fuel cell is provided on the outside of the transmission case with respect to the left-right direction of the vehicle body.

[0013] The seventh aspect of the present invention is that the water outlet is located behind the rear wheel, The sixth work vehicle of the present invention is characterized in that the position of the water discharge port in a plan view is on the outermost line of the rear wheel with respect to the left-right direction of the vehicle body.

[0014] The eighth aspect of the present invention is that a plurality of the hydrogen tanks are arranged symmetrically with respect to the left-right direction of the vehicle body so as to be aligned in the front-rear direction of the vehicle body, The tank length of the hydrogen tank in the left-right direction of the vehicle body increases from the front to the rear of the vehicle body. The seventh work vehicle of the present invention is characterized in that the outer surface of the rear wheel fender is curved to conform to the end face of the hydrogen tank in the left-right direction of the vehicle body.

[0015] The ninth aspect of the present invention is that the shape of the hydrogen tank is substantially cylindrical, with a tank through-hole that penetrates through the longitudinal direction of the tank. A seventh work vehicle of the present invention is characterized in that the drive shaft that transmits the power of the motor is provided to pass through the tank through-hole.

[0016] The tenth aspect of the present invention is a water storage tank for storing the fuel cell drain water of the fuel cell, and a sprayer for spraying the fuel cell drain water in the water storage tank onto the radiator, and It is a work vehicle according to the eighth or ninth aspect of the present invention, characterized by comprising.

Effects of the Invention

[0017] According to the present invention, it is possible to arrange components of relatively heavy units such as a hydrogen tank and a fuel cell with good vehicle body balance characteristics.

Brief Description of the Drawings

[0018] [Figure 1] (a) Plan view of the tractor according to the embodiment of the present invention, (b) Left side view of the tractor according to the embodiment of the present invention [Figure 2] Plan view of the tractor according to the first modification example of the embodiment of the present invention [Figure 3] (a) Plan view of the tractor according to the second modification example of the embodiment of the present invention, (b) Left side view of the tractor according to the second modification example of the embodiment of the present invention [Figure 4] (a) Plan view of the tractor according to the third modification example of the embodiment of the present invention, (b) Left side view of the tractor according to the third modification example of the embodiment of the present invention [Figure 5] (a) Plan view of the tractor according to the fourth modification example of the embodiment of the present invention, (b) Left side view of the tractor according to the fourth modification example of the embodiment of the present invention [Figure 6] (a) Plan view of the tractor according to the fifth modification example of the embodiment of the present invention, (b) Left side view of the tractor according to the fifth modification example of the embodiment of the present invention [Figure 7] (a) Explanatory drawing (one) of the tractor according to another embodiment of the present invention, (b) Explanatory drawing (two) of the tractor according to another embodiment of the present invention [Figure 8](a) Explanatory diagram of a first modified combine harvester according to another embodiment of the present invention (part 1), (b) Explanatory diagram of a first modified combine harvester according to another embodiment of the present invention (part 2) [Figure 9] Diagram illustrating a tractor of a second modified example of another embodiment of the present invention. [Figure 10] Diagram illustrating a third modified example of a tractor in another embodiment of the present invention. [Figure 11] (a) Explanatory diagram of a tractor according to yet another embodiment of the present invention (part 1), (b) Explanatory diagram of a tractor according to yet another embodiment of the present invention (part 2) [Figure 12] Diagram illustrating a tractor of a first modified example of yet another embodiment of the present invention. [Figure 13] Diagram illustrating a second modified tractor of yet another embodiment of the present invention. [Figure 14] (a) Explanatory diagram of a third modified tractor according to yet another embodiment of the present invention (part 1), (b) Explanatory diagram of a third modified tractor according to yet another embodiment of the present invention (part 2) [Figure 15] Diagram illustrating a fourth modified example of a combine harvester in yet another embodiment of the present invention. [Modes for carrying out the invention]

[0019] Embodiments of the present invention will be described in detail with reference to the drawings.

[0020] The same applies below, however, some components may not be shown in the drawings, or they may be shown in perspective or in an abbreviated form.

[0021] While describing the operation of the tractor according to the embodiment of the present invention, a method for controlling the operation of a work vehicle related to the present invention, which is realized by a controller or the like, will also be described.

[0022] The tractor in the embodiment of the present invention is a work vehicle equipped with a seat 11, and is a specific example of a work vehicle in the present invention.

[0023] (1) First, the configuration and operation of the tractor according to the embodiment of the present invention will be described in detail, mainly with reference to Figures 1(a) and 1(b).

[0024] Here, Figure 1(a) is a plan view of the tractor according to an embodiment of the present invention, and Figure 1(b) is a left side view of the tractor according to an embodiment of the present invention.

[0025] By positioning the operator's seat 11 relatively far forward on the vehicle body 10, the resulting empty space behind the seat 11 allows for the compact arrangement of various components of the fuel cell 30. Compared to diesel engines, the degree of freedom in component layout is often not very large, but by utilizing already established fuel cell technology, it is possible to arrange the components of relatively heavy units such as the hydrogen tank 20 and the fuel cell 30 with good vehicle body balance characteristics.

[0026] For example, the transmission case configuration of a diesel engine can be made useful.

[0027] The hydrogen tank 20 is a unit for storing hydrogen. The fuel cell 30 is a unit that generates electricity using the hydrogen in the hydrogen tank 20. The battery 40 is a unit that stores the electricity generated by the fuel cell 30.

[0028] The battery 40 is positioned as follows: The battery 40 is located inside the hood 101.

[0029] Motor 50 is a unit that generates power using the energy stored in battery 40.

[0030] The arrangement of the motor 50 is as follows: The position of the input shaft of the transmission case 60, which corresponds to the output shaft of the diesel engine, is approximately the same as the position of the drive shaft 51, which is the output shaft of the motor 50. The driving force of the drive system and the driving force of the PTO system are supplied by a single motor, the motor 50. The motor 50 is located below the hood 101. The position of the motor 50 is above the axle of the front wheel 102.

[0031] The hydrogen tank 20 is located below the seat 11.

[0032] More specifically, the arrangement of the hydrogen tank 20 is as follows: The hydrogen tank 20 is located below the seat 11. The position of the hydrogen tank 20 is in front of the fuel cell 30. The longitudinal direction of the hydrogen tank 20 is approximately the same as the left-right direction of the vehicle body.

[0033] The fuel cell 30 is located behind the hydrogen tank 20.

[0034] More specifically, the arrangement of the fuel cell stack, which is the fuel cell stack, is as follows: The fuel cell 30 is positioned above the transmission case 60. The position of the fuel cell 30, which is positioned behind the seat 11, is below the seat 11. The fuel cell 30 is positioned relatively offset inward from the vehicle body 10, and the width w1 of the fuel cell 30 in the left-right direction of the vehicle body is smaller than the width w2 of the rear wheel 70.

[0035] The power control unit 103, also called the power control unit, is positioned as follows: The power control unit 103 is located inside the hood 101. The power control unit 103, positioned above the motor 50, is located behind the radiator 80.

[0036] The relatively large-capacity hydrogen tank 20 is not positioned in an unstable location such as above the cabin, resulting in good vehicle balance characteristics and ensuring safety even in the event of a tractor rollover. Since the fuel cell 30 is not located inside the hood 101, the hood 101 does not become bulky, and forward visibility is good. Upward visibility is also good, allowing for unimpeded operations such as front loader work. A component layout that can be adopted even in configurations where the cabin is not used is constructed at a low cost. This allows for the realization of a fuel cell unit package with practical specifications without necessarily adhering to the current tractor image.

[0037] This specification embodies a new approach while utilizing already established fuel cell technology. The vehicle boasts excellent characteristics such as a low center of gravity, front-to-rear balance, and forward visibility, resulting in superior safety. The relatively low height of the hydrogen tank 20 and fuel cell 30 facilitates maintenance. In particular, the relatively low height of the hydrogen tank 20 allows for the use of shorter hydrogen piping, which is expected to reduce costs. Furthermore, the ability to utilize the transmission case configuration of diesel engines is expected to facilitate development and reduce development costs.

[0038] Specifically, the fuel cell 30 is positioned at the rear of the transmission case 60, above the axles of the left and right rear wheels 70, in a direction perpendicular to the longitudinal direction of the transmission case 60. A hydrogen tank 20 is provided in front of the fuel cell 30, and the hydrogen tank 20 is positioned below the seat 11, with its gas intake facing the left and right sides of the work vehicle. Not only is the height of the hydrogen tank 20's mounting area matched to the height of the fuel cell 30, but the curved surface of the hydrogen tank 20 is used to position the seat 11, ensuring sufficient legroom for the operator in the seat 11. An engine-type transmission case 60 is used, and the fuel cell 30 is positioned above the transmission case 60 to ensure safety. The hydrogen tank 20 is oriented toward the side of the work vehicle to facilitate hydrogen gas refueling. This configuration allows the hydrogen tank 20 to be housed compactly.

[0039] The transmission case 60 is a unit that changes the power of the motor 50. The hydrogen tank 20 is located on the upper front side of the transmission case 60. The fuel cell 30 is located on the upper rear side of the transmission case 60.

[0040] The fuel cell 30, hydrogen tank 20, power control unit 103, battery 40, and motor 50 are positioned in a side view at the tip of the bumper 104, the upper end of the front lops 105, the upper end of the rear lops 106, the rear of the transmission case 60, and the area surrounding the axle of the front wheel 102. This arrangement helps to suppress damage to so-called engine components that are prone to occurring in the event of rollovers and collisions.

[0041] The rear fender 71 is a unit that covers the rear wheel 70. An air cleaner 31 for supplying oxygen to the fuel cell 30 is located inside the rear fender 71.

[0042] As shown in Figure 2, a plan view of a tractor representing a first modified embodiment of the present invention, the air cleaner 31 is located inside the rear wheel fender 71, and a mesh configuration is employed on the outer surface of the rear wheel fender 71 from the front of the fender to the top of the fender on the side of the seat 11. Oxygen-containing air is drawn into the fuel cell 30 with high efficiency.

[0043] In other words, the air cleaner 31 is installed inside the rear wheel fender 71. Dust that is likely to be generated in agricultural machinery is sucked in by the air cleaner 31 and hardly enters the inside of the fuel cell 30.

[0044] A hydrogen refueling port 20p for supplying hydrogen to the hydrogen tank 20 is provided on the outer surface of the rear wheel fender 71.

[0045] As shown in Figure 3(a), a plan view of a tractor of a second modified embodiment of the present invention, and Figure 3(b), a left side view of a tractor of a second modified embodiment of the present invention, the hydrogen refueling port 20p is provided on the left side of the fender, which functions as a side cover of the rear wheel fender 71. Not only is the ease of hydrogen refueling facilitated by improved accessibility to the hydrogen refueling port 20p, but the distance from the hydrogen refueling port 20p to the hydrogen tank 20 is small, and the hydrogen flow path is configured as the shortest possible path, so hydrogen loss is reduced, and as a result, an improvement in so-called electric fuel efficiency is expected.

[0046] The cooling water passage 81 is a unit that circulates cooling water to cool at least the fuel cell 30, battery 40, and motor 50. The radiator 80 is a unit that dissipates heat from the cooling water passage 81. The battery 40, motor 50, and radiator 80 are located at the front of the vehicle body 10.

[0047] The radiator 80 is located in front of the battery 40 and the motor 50.

[0048] Specifically, the radiator 80, battery 40, and power control unit 103 are located in the hood 101 in front of the control panel near the seat 11. The front main frame of the vehicle body 10, which is connected to the transmission case 60, is located above the front axle, which is the axle of the front wheel 102. The motor 50 is positioned between these main frames. The radiator 80 is a water-cooled radiator, and its exhaust is directed towards the front of the hood 101. The battery 40, motor 50, and fuel cell 30 are cooled by the flow of coolant from the radiator 80. Because the fuel cell 30 is large, in small vehicles it is placed behind the seat 11, but since the fuel cell 30 generates heat, it is cooled by coolant. By positioning the radiator 80 at the front, the exhaust is directed forward to release the heat.

[0049] A water outlet 30p for discharging fuel cell wastewater from the fuel cell 30 is located on the outside of the transmission case 60 in the left-right direction of the vehicle body.

[0050] As shown in Figure 4(a), a plan view of a tractor of a third modified embodiment of the present invention, and Figure 4(b), a left side view of a tractor of a third modified embodiment of the present invention, the water outlet 30p provided on the outer surface of the rear of the transmission case 60 is located between the left and right rear wheels 70. Since the impact of fuel cell drainage on other delicate units, which are different from the robust transmission case 60, is reduced, damage caused by electrical short circuits is less likely to occur, and improved component durability can be expected.

[0051] The water outlet 30p is located behind the rear wheel 70. In a plan view, the water outlet 30p is located on the outermost line L of the rear wheel 70 in the left-right direction of the vehicle body.

[0052] As shown in Figure 5(a), a plan view of the tractor of the fourth modified embodiment of the present invention, and Figure 5(b), a left side view of the tractor of the fourth modified embodiment of the present invention, the water outlet 30p is provided on the outer width of the rear wheel 70 in a plan view, rather than on the outer width of the front wheel 102 in a plan view. Even when turning operations are performed, the rut line of the rear wheel 70 that the vehicle body 10 has already passed can be determined by image recognition of the fuel cell wastewater discharged from the water outlet 30p. The next straight-line operation can be performed so that the front wheel 102 follows the rut line of the rear wheel 70, thus avoiding redundant driving operations and promoting work efficiency.

[0053] Multiple hydrogen tanks 20 are arranged symmetrically with respect to the left-right direction of the vehicle, so as to be aligned in the front-rear direction of the vehicle. The tank length λ of the hydrogen tanks 20 in the left-right direction of the vehicle increases from the front to the rear of the vehicle. The outer surface of the rear wheel fender 71 is curved to follow the end faces of the hydrogen tanks 20 in the left-right direction of the vehicle.

[0054] As shown in Figure 6(a), a plan view of the tractor of the fifth modified embodiment of the present invention, and Figure 6(b), a left side view of the tractor of the fifth modified embodiment of the present invention, in an embodiment in which multiple hydrogen tanks 20 of different lengths are used, the shorter hydrogen tanks 20 are positioned at the front of the vehicle and the longer hydrogen tanks 20 are positioned at the rear of the vehicle. Therefore, the tank length λ=λ1 of the hydrogen tank 20 positioned at the front of the vehicle is smaller than the tank length λ=λ2 of the hydrogen tank 20 positioned at the rear of the vehicle. The size of the rear wheel fender 71 in the left-right direction of the vehicle is suppressed, which facilitates the operator's dismounting from the tractor and improves accessibility to the seat 11. It goes without saying that safety is also improved, as falls on the dismounting step are less likely to occur.

[0055] (2) Next, the configuration and operation of the tractor of the embodiment of the present invention will be described in more detail, mainly with reference to Figures 7(a) and 7(b).

[0056] Herein, Figures 7(a) and 7(b) are explanatory diagrams (the first and second) of a tractor according to another embodiment of the present invention.

[0057] The shape and arrangement of the hydrogen tanks are as follows:

[0058] The hydrogen tank 20 has a substantially cylindrical shape, with a tank through-hole 20h that penetrates through the tank in the longitudinal direction. The drive shaft 51 that transmits power from the motor 50 is positioned to pass through the tank through-hole 20h.

[0059] The hydrogen tank 20, which is the hydrogen tank for the fuel cell of the tractor equipped with the fuel cell 30, has a donut-shaped cross-section, and the drive shaft 51 passes through the space inside the hydrogen tank 20 to the gearbox 201. The inside of the hydrogen tank 20 will be under high pressure, so the tank shape needs to be cylindrical, but this does not impose many restrictions on the layout of the vehicle components. In other words, by making the cross-section donut-shaped, it is possible to ensure the pressure resistance inside the hydrogen tank 20 while ensuring the freedom of layout for the vehicle components.

[0060] As shown in Figures 8(a) and 8(b), which are explanatory diagrams (I and II) of a combine harvester of a first modified example of another embodiment of the present invention, a rice grain conveying spiral pipe 202 is passed through the space inside the hydrogen tank 20 of the combine harvester equipped with a fuel cell 30, as piping for conveying rice grains.

[0061] As shown in Figure 9, an explanatory diagram of a tractor of a second modified example of another embodiment of the present invention, the hydrogen tank 20 is placed on the upper part of the vehicle (above the cabin) of the tractor equipped with the fuel cell 30, and the tank support column 203 of the hydrogen tank 20 is configured to be rotatable with a pivot point at the rear of the vehicle (near the rear axle), allowing the hydrogen tank 20 to be moved according to the operator's instructions. Since the hydrogen tank 20 is not placed on the upper part of the vehicle (above the cabin), the overall height is not increased, and it can be easily stored in a warehouse or barn. Since the hydrogen tank 20 is not placed on the upper part of the vehicle, maintenance is less likely to be hindered. When storing the vehicle, the overall height of the vehicle can be lowered according to the operator's instructions, preventing problems when storing it in a warehouse or barn. The maintainability of the hydrogen tank 20 can be improved.

[0062] As shown in Figure 10, an explanatory diagram of a third modified example of another embodiment of the present invention, two hydrogen tanks 20 are arranged on the upper part of the vehicle (above the cabin) of the tractor equipped with a fuel cell 30, and the tank support columns 203 are configured to be rotatable with pivot points on the left and right sides of the vehicle (near the cabin mount).

[0063] (3) Next, the configuration and operation of the tractor of the embodiment of the present invention will be described in more detail, mainly with reference to Figures 11(a) and 11(b).

[0064] Herein, Figures 11(a) and 11(b) are explanatory diagrams (the first and second) of a tractor according to yet another embodiment of the present invention.

[0065] The use of wastewater in fuel cells is explained as follows:

[0066] The water storage tank 91 is a unit that stores the fuel cell wastewater from the fuel cell 30. The sprayer 90 is a unit that sprays the fuel cell wastewater from the water storage tank 91 onto the radiator 80.

[0067] A water storage tank 91 is positioned lower than the exhaust pipe of the fuel cell 30 on a tractor equipped with a fuel cell 30 and connected by piping. The water storage tank 91 and a sprayer 90 are connected, and a pump 301 is placed along the path. The sprayer 90 is positioned in front of the heat exchanger of the radiator 80, and when the cooling capacity of the radiator 80 is insufficient (during overheating), the wastewater is sprayed. This establishes a method for utilizing the water discharged by the power generation of the fuel cell 30. The size of the heat exchanger of the radiator 80 is often limited by the mounting space of the vehicle, but since the fuel cell 30 generates heat when in use, the radiator 80 provides the necessary cooling. By enabling the fuel cell wastewater to be sprayed onto the radiator 80, the wastewater is sprayed when the cooling capacity of the radiator 80 is insufficient, thereby suppressing the occurrence of overheating.

[0068] As shown in Figure 12, an explanatory diagram of a tractor of a first modified example of yet another embodiment of the present invention, a water storage tank 91 of a tractor equipped with a fuel cell 30 is connected to a sprinkler 302, a pump 301 is placed along the path, and the sprinkler 302 is positioned in front of the tractor to spray water in front of the vehicle during tilling. Even if dust is generated when tilling with the tractor, the operating environment of the vehicle is less likely to deteriorate. By using the wastewater from the fuel cell 30 to spray water in front of the tractor, vehicle problems caused by dust during operation are suppressed.

[0069] As shown in Figure 13, an explanatory diagram of a tractor of a second modified example of yet another embodiment of the present invention, a piping is connected to the water storage tank 91 of the tractor equipped with a fuel cell 30, a pump 301 is placed along the route, and a joint member 303 is provided at the end of the piping so that an attachment member 304 can be connected according to the user's purpose. Even when water is needed in the field, there is no need to prepare water separately. By making the wastewater from the fuel cell 30 available for use according to the user's purpose, the time required to prepare water when it is needed can be reduced, thus increasing work efficiency.

[0070] As shown in Figures 14(a) and 14(b), which are explanatory diagrams (I and II) of a third modified example of yet another embodiment of the present invention, the condensation water drain hose outlet of the air conditioner 305 of the tractor equipped with the fuel cell 30 is connected to a water storage tank 91, and a water extraction pipe is provided in the water storage tank 91, with a pump 301 installed in the piping path. By using the drainage from the fuel cell 30 and the condensation water from the air conditioner 305 together, a water shortage is prevented even when water is used externally.

[0071] As shown in Figure 15, an explanatory diagram of a fourth modified combine harvester according to yet another embodiment of the present invention, the water storage tank 91 of the combine harvester equipped with a fuel cell 30 is connected to a sprinkler 302, a pump 301 is placed along the path, and the sprinkler 302 is placed near the straw cutter to spray the wastewater onto the straw. Since the straw debris and dust generated during the harvesting operation of the combine harvester hardly clog the heat exchanger of the radiator 80, the cooling capacity of the radiator 80 does not decrease easily. By using the wastewater from the fuel cell 30 to spray water near the straw cutter, vehicle problems caused by straw debris and dust discharged from the vehicle are suppressed.

[0072] Furthermore, the program of the invention related to the present invention is a program that causes a computer to execute all or part of the steps (or processes, operations, and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a program that operates in cooperation with the computer.

[0073] Furthermore, the recording medium of the invention related to the present invention is a recording medium that records a program for causing a computer to execute all or part of the steps (or processes, operations, and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a computer-readable recording medium in which the read program is used in cooperation with the computer.

[0074] Furthermore, the "some steps (or processes, actions, and functions, etc.)" mentioned above refers to one or more of those steps.

[0075] Furthermore, the "actions of the steps (or processes, movements, and actions, etc.)" mentioned above refer to the actions of all or part of the steps mentioned above.

[0076] Furthermore, one form of use of the program of the invention related to the present invention may be that it is transmitted through a transmission medium such as the internet, light, radio waves, or sound waves, read by a computer, and operates in cooperation with the computer.

[0077] Furthermore, recording media include ROM (Read Only Memory), among others.

[0078] Furthermore, a computer is not limited to pure hardware such as a CPU (Central Processing Unit), but may also include firmware, an OS (Operating System), and even peripheral devices.

[0079] As mentioned above, the configuration of the present invention may be implemented in software or in hardware. [Industrial applicability]

[0080] The work vehicle in this invention can accommodate the layout of relatively heavy units, such as hydrogen tanks and fuel cells, with good body balance characteristics, making it useful for use in work vehicles such as tractors. [Explanation of Symbols]

[0081] 10 car bodies 11 seats 20 hydrogen tanks 20h Tank penetration hole 20p Hydrogen refueling port 30 Fuel Cell 30p water outlet 31 Air Cleaner 40 batteries 50 motors 51 Drive shaft 60 Transmission Case 70 Rear wheel 71 Rear fender 80 Radiator 81 Cooling water pathway 90 Sprayer 91 Water storage tank 101 Food 102 Front Wheel 103 Power control unit 104 Bumper 105 Front Lops 106 Rearrops 201 Gearbox 202 Rice hull conveying spiral pipe 203 Tank support column 301 Pump 302 Sprinkler 303 Joint Member 304 Attachment Member 305 Air Conditioner λ, λ1, λ2 Tank length w1, w2 width L outermost line

Claims

1. A work vehicle equipped with seats, A hydrogen tank for storing hydrogen, A fuel cell that generates electricity using the hydrogen in the hydrogen tank, A battery for storing the electricity generated by the fuel cell, A motor that generates power using the stored energy of the aforementioned battery, It is equipped with, The hydrogen tank is located below the seat. The work vehicle is characterized in that the fuel cell is located behind the hydrogen tank.

2. It is equipped with a transmission case that changes the speed of the power of the motor, The hydrogen tank is located on the upper side of the front of the transmission case. The work vehicle according to claim 1, characterized in that the fuel cell is located on the upper side of the rear of the transmission case.

3. It is equipped with a rear fender that covers the rear wheel. An air cleaner for supplying oxygen to the fuel cell is provided inside the rear wheel fender. The work vehicle according to claim 2, characterized in that a hydrogen filling port for supplying hydrogen to the hydrogen tank is provided on the outer surface of the rear wheel fender.

4. A cooling water path for circulating cooling water to cool the fuel cell, the battery, and the motor, A radiator that dissipates heat from the cooling water in the aforementioned cooling water path, It is equipped with, The work vehicle according to claim 3, characterized in that the battery, motor, and radiator are located at the front of the vehicle body.

5. The work vehicle according to claim 4, characterized in that the radiator is positioned in front of the battery and the motor.

6. The work vehicle according to claim 5, characterized in that the water outlet for discharging fuel cell wastewater from the fuel cell is provided on the outside of the transmission case in the left-right direction of the vehicle body.

7. The water outlet is located behind the rear wheel. The work vehicle according to claim 6, characterized in that the position of the water outlet in a plan view is on the outermost line of the rear wheel with respect to the left-right direction of the vehicle body.

8. Multiple hydrogen tanks are arranged symmetrically with respect to the left-right direction of the vehicle body, so as to be lined up in the front-rear direction of the vehicle body. The tank length of the hydrogen tank in the left-right direction of the vehicle body increases from the front to the rear of the vehicle body. The work vehicle according to claim 7, characterized in that the outer surface of the rear wheel fender is curved to conform to the end face of the hydrogen tank in the left-right direction of the vehicle body.

9. The hydrogen tank has a substantially cylindrical shape, with a tank through-hole that penetrates through the longitudinal direction of the tank. The work vehicle according to claim 7, characterized in that the drive shaft for transmitting the power of the motor is provided to pass through the tank through-hole.

10. A water storage tank for storing the fuel cell wastewater from the fuel cell, A sprayer for spraying the fuel cell wastewater from the storage tank onto the radiator, The work vehicle according to claim 8 or 9, characterized by being equipped with the following:

Images