WO2025004561A1 - 作業車両 - Google Patents

作業車両 Download PDF

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Publication number
WO2025004561A1
WO2025004561A1 PCT/JP2024/017628 JP2024017628W WO2025004561A1 WO 2025004561 A1 WO2025004561 A1 WO 2025004561A1 JP 2024017628 W JP2024017628 W JP 2024017628W WO 2025004561 A1 WO2025004561 A1 WO 2025004561A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
vehicle
vehicle body
tank
width direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/017628
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
剛 ▲高▼木
恒平 堀池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP2025529490A priority Critical patent/JPWO2025004561A1/ja
Priority to EP24831434.6A priority patent/EP4737169A1/en
Publication of WO2025004561A1 publication Critical patent/WO2025004561A1/ja
Priority to US19/409,007 priority patent/US20260084520A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K15/067—Mounting of tanks
    • B60K15/07—Mounting of tanks of gas tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K8/00—Arrangement or mounting of propulsion units not provided for in one of main groups B60K1/00 - B60K7/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03309—Tanks specially adapted for particular fuels
    • B60K2015/03315—Tanks specially adapted for particular fuels for hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • B60K2015/0458—Details of the tank inlet
    • B60K2015/0474—Arrangement of fuel filler pipes in relation to vehicle body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K2015/0634—Arrangement of tanks the fuel tank is arranged below the vehicle floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/20—Off-Road Vehicles
    • B60Y2200/22—Agricultural vehicles
    • B60Y2200/221—Tractors

Definitions

  • the present invention relates to a work vehicle.
  • This application claims priority to Japanese Application No. 2023-107634, filed on June 30, 2023, and incorporates by reference all of the contents of said Japanese application.
  • Patent Document 1 discloses a work vehicle that has a tank for storing hydrogen gas, a fuel cell, and a motor.
  • the fuel cell generates electricity using the hydrogen gas in the tank, and the motor rotates using that electricity.
  • the work vehicle runs using the rotational force of the motor as a driving force.
  • a work vehicle has a vehicle body, a fuel cell, a tank for storing hydrogen gas to be supplied to the fuel cell, a fill port for the hydrogen gas, piping connecting the fill port to the tank, and a frame connected to the vehicle body, the frame having a mounting portion for mounting the fill port.
  • FIG. 1 is a perspective view showing an embodiment of a work vehicle according to the present disclosure.
  • FIG. 2 is a front view of the work vehicle shown in FIG.
  • FIG. 3 is a rear view of the work vehicle shown in FIG.
  • FIG. 4 is a side view of the work vehicle shown in FIG.
  • FIG. 5 is a side view of the work vehicle shown in FIG.
  • FIG. 6 is a plan view of the work vehicle shown in FIG. 7 is a bottom view of the work vehicle shown in FIG. 1.
  • FIG. 8 is a perspective view showing a part of the work vehicle shown in FIG. 1 in an exploded state.
  • FIG. 9 is a side view of the work vehicle with the hood and other components removed.
  • FIG. 10 is a perspective view of the vehicle body with the right rear wheel removed.
  • FIG. 10 is a perspective view of the vehicle body with the right rear wheel removed.
  • FIG. 11 is a side view of the work vehicle shown in FIG. 5 with the rear wheels and the front frame removed.
  • FIG. 12 is an explanatory diagram of the filler attached to the bracket and its surroundings.
  • FIG. 13 is an explanatory diagram of the fuel cell and the exhaust path.
  • FIG. 14 is a perspective view of the battery unit and the discharge pipe supported by the support structure.
  • FIG. 15 is an exploded perspective view of the battery unit, the exhaust pipe, and the support structure.
  • FIG. 16 is a front view of the battery unit and the discharge pipe supported by the support structure.
  • FIG. 17 is a front view showing the battery unit separated from the support structure.
  • the present disclosure therefore aims to provide a work vehicle that makes it easy to fill with hydrogen gas.
  • the work vehicle of this embodiment has a vehicle body, a fuel cell, a tank for storing hydrogen gas to be supplied to the fuel cell, a filling port having a filling port for the hydrogen gas, piping connecting the filling port to the tank, and a frame connected to the vehicle body, the frame having a mounting portion for attaching the filling port.
  • the work vehicle has a fuel cell located at the front of the vehicle body and generating electricity using hydrogen gas as fuel, and the frame is located toward the rear of the vehicle body.
  • the filling port is located at the rear of the work vehicle, and is located away from the fuel cell, thereby improving safety.
  • the work vehicle of (2) has a driver's seat mounted on the vehicle body and a cabin with the driver's seat inside, the fuel cell is located in front of the cabin, and the frame having the mounting portion is located behind the cabin.
  • the cabin is interposed between the filling port and the fuel cell, and the filling port is located away from the fuel cell.
  • the filling port has a housing that accommodates the filling port, the filling port is arranged to open to the rear or side of the vehicle, and the piping is connected to the filling port from the front of the housing.
  • the filling port is protected by the housing.
  • the piping is connected to the filling port from a space formed between the housing and the rear of the vehicle body. The connection between the piping and the housing is not exposed to the wide space behind the vehicle, and the connection is protected.
  • the work vehicle of any one of (1) to (4) has a running gear having front wheels and rear wheels, a driver's seat mounted on the vehicle body, and a cabin having the driver's seat inside, and the filling port is located behind the cabin and between the rear wheels on both sides in the vehicle width direction.
  • the filling port is protected from the left and right directions by the rear wheels, and is protected from the front by the cabin.
  • the frame is part of a mounting frame for mounting the tank on the vehicle body.
  • the mounting frame for mounting the tank on the vehicle body is also used as a frame for attaching the filling port to the vehicle body.
  • the work vehicle according to any one of (1) to (6) above has a clamp member for fixing the piping to a portion of the frame.
  • the clamp members secure the piping to the frame and prevent it from shifting out of position.
  • any one of the work vehicles described in (1) to (7) has a coupling device for coupling another equipment to the rear of the vehicle body, and when the vehicle body is viewed from the rear, the filling port is located above the coupling device.
  • the connecting device for example, by changing its posture or position, the filling port is unlikely to be hidden by the connecting device, which makes it easy to fill the hydrogen gas through the filling port.
  • the work vehicle of any one of (1) to (8) has a driver's seat mounted on the vehicle body and a cabin having the driver's seat inside, the vehicle body has a connecting bracket for attaching the cabin, and the frame is connected to the connecting bracket.
  • the connecting bracket for mounting the cabin is also used as a member for mounting the filling port to the vehicle body via the frame.
  • the mounting portion is positioned offset to one side in the vehicle width direction. According to the above configuration, when an operator performs hydrogen gas filling work, even if it is difficult for the operator to approach the rear of the work vehicle, the operator can easily reach the filling port.
  • the frame has a frame material standing upright from the vehicle body.
  • a mounting portion for the filling port is provided on the frame material that stands from the vehicle body.
  • the frame has as the frame material a frame material located on one side of the vehicle body in a vehicle width direction, and a frame material located on the other side of the vehicle body in the vehicle width direction.
  • an attachment portion for the filling port is provided across either or both of the frame material located on one side of the vehicle body in the vehicle width direction and the frame material located on the other side of the vehicle body in the vehicle width direction.
  • the frame has a third frame member connecting the first frame member located on one side of the vehicle width direction and the frame member located on the other side of the vehicle width direction.
  • the filling port can be located below the third frame member. The filling port is protected from above by the third frame member.
  • the work vehicle according to any one of (1) to (13) is used for agricultural work.
  • the work vehicle is a vehicle for agricultural work, for example a tractor.
  • FIG. 1 is a perspective view showing an embodiment of a work vehicle according to the present disclosure.
  • Fig. 2 to Fig. 7 are a front view, a rear view, a side view (left side view), a side view (right side view), a plan view, and a bottom view of the work vehicle shown in Fig. 1.
  • the work vehicle 10 of this embodiment is a vehicle that can be used for agricultural work, and the work vehicle 10 shown in Fig. 1 is a tractor.
  • the work vehicle is not limited to a tractor.
  • the work vehicle according to the present invention may be an agricultural machine, a construction machine, a utility vehicle, or the like other than a tractor.
  • the directions of the work vehicle 10 of the present disclosure are defined below.
  • the direction in which the work vehicle 10 moves forward is defined as “front”
  • the direction in which the work vehicle 10 moves backward is defined as “back”
  • the left side when facing forward is defined as “left”
  • the right side when facing forward is defined as “right”.
  • the left-right direction perpendicular to the front-to-rear direction is defined as the vehicle width direction.
  • the direction perpendicular to both the front-to-rear direction and the vehicle width direction (left-to-right direction) is defined as the up-down direction.
  • the up-down direction is also called the height direction.
  • an orthogonal three-dimensional coordinate system is shown, with the forward direction indicated by an arrow X1, the backward direction indicated by an arrow X2, the left direction indicated by an arrow Y1, the right direction indicated by an arrow Y2, the up direction indicated by an arrow Z1, and the down direction indicated by an arrow Z2.
  • the work vehicle 10 shown in FIG. 1 has a vehicle body 11, a running device 12 that supports the vehicle body 11 so that it can run, a driver's seat 15, a cabin 16, a tank unit 21 having a tank 13 for storing fuel, and a drive device 14 that is powered by the fuel stored in the tank 13.
  • the fuel is hydrogen
  • the tank 13 is a hydrogen tank that stores hydrogen gas.
  • the work vehicle 10 of this embodiment is a fuel cell vehicle (FCV), and runs on electricity generated by a fuel cell (fuel cell module) 24 using hydrogen and oxygen.
  • FCV fuel cell vehicle
  • the work vehicle 10 has a fuel cell 24, a battery unit 30, and an electric motor 31 as the drive device 14.
  • the battery unit 30 has a battery 300 that stores the power generated by the fuel cell 24, and supplies the stored power to the motor 31.
  • the work vehicle 10 has a piping (hydrogen piping) 22 for hydrogen gas, and a filling section 25 (see FIG. 3).
  • the filling section 25 has a filling port (receptacle) 26 to which a filling nozzle of a hydrogen gas supply device (not shown) that is separate from the work vehicle 10 is connected. Hydrogen gas is supplied from the filling port 26 and supplied to the tank 13 through the piping 22 (rear piping 22r). The hydrogen gas in the tank 13 is supplied to the fuel cell 24 through the piping 22 (front piping 22f).
  • the specific configurations of the filling section 25 and the piping 22 will be described later.
  • the work vehicle 10 (see FIG. 1) has a mounting frame 17 and a support structure 37.
  • the mounting frame 17 is a frame for mounting the tank unit 21 (tank 13) on the vehicle body 11.
  • the support structure 37 is a component for supporting the battery unit 30 on the vehicle body 11.
  • the work vehicle 10 (see FIG. 7) has an exhaust path 35.
  • the exhaust path 35 exhausts water or water vapor generated by the operation of the fuel cell 24 to the outside.
  • FIG. 8 is an exploded perspective view of a part of the work vehicle 10 shown in FIG. 1.
  • the chassis 41 is located at the center in the vehicle width direction and has a shape that is long in the vehicle front-rear direction.
  • the chassis 41 has a front frame 32 that constitutes the front part of the chassis 41, and a gear case 33 that constitutes the rear part of the chassis 41.
  • the front frame 32 is formed by combining metal frame materials and the like, and has high rigidity.
  • the gear case 33 is formed by having a metal box body.
  • the gear case 33 is connected to the rear part of the front frame 32, and the gear case 33 and the front frame 32 form the framework of the vehicle body 11.
  • the front frame 32 mounts the motor 31.
  • the gear case 33 has therein a power transmission mechanism 333 such as a transmission, a clutch, a differential gear, etc.
  • the power transmission mechanism 333 reduces or increases the speed of rotation of the output shaft of the motor 31, and outputs the rotation to the traveling device 12 (one or both of the front wheels 121 and the rear wheels 122).
  • the gear case 33 has a main case 337 located in the center in the vehicle width direction, and axle cases 335 for the rear wheels 122 located on both sides in the vehicle width direction at the rear of the main case 337.
  • the main case 337 and the axle cases 335 are made of, for example, cast steel and have high rigidity.
  • the power transmission mechanism 333 outputs a portion of the power of the motor 31 to the PTO shaft 334 (see FIG. 3).
  • the PTO shaft 334 is an output shaft provided at the rear of the gear case 33.
  • the work vehicle 10 has a coupling device 43 for coupling another device to the rear of the vehicle body 11.
  • the PTO shaft 334 transmits the power of the motor 31 to the other device coupled to the coupling device 43.
  • the other device is a work device (not shown), also called an implement.
  • the work device is operated by the power of the motor 31.
  • the work device is, for example, a tiller.
  • FIG. 9 is a left side view of the work vehicle 10 with the bonnet 34, cover 111, and part of the tank case 211 of the tank unit 21 removed.
  • a first radiator 48, a fuel cell 24, and a second radiator 49 are mounted on the chassis 41 in this order.
  • the bonnet 34 and the cover 111 cover mounted components located toward the front of the vehicle body 11.
  • the bonnet 34 covers the fuel cell 24 and the first radiator 48 from above and from both sides in the vehicle width direction.
  • the cover 111 covers the second radiator 49 located behind the fuel cell 24 from above and from both sides in the vehicle width direction.
  • An upper surface 48a of the first radiator 48 is lower than an upper surface 24a of the fuel cell 24.
  • the upper surface 24a of the fuel cell 24 is lower than an upper surface 49a of the second radiator 49.
  • the top surface 111a of the cover 111 is higher than the top surface 34a of the bonnet 34, but lower than the top end of the steering wheel 151 that is operated for steering by an operator sitting in the driver's seat 15.
  • the top surface 34a of the bonnet 34 becomes lower toward the front. For this reason, the view of the operator sitting in the driver's seat 15 is less likely to be obstructed.
  • the driver's seat 15 and the cabin 16 are provided on the chassis 41 at a rearward position (see FIG. 1).
  • the cabin 16 has the driver's seat 15 therein.
  • the cabin 16 has a front pillar 162 located forward of the driver's seat 15, a rear pillar 163 located behind the front pillar 162, and a roof 164 located above the driver's seat 15.
  • the front pillar 162 is provided on the left front and right front of the driver's seat 15.
  • the rear pillar 163 is provided on the left rear and right rear of the driver's seat 15.
  • the roof 164 is supported by the front pillar 162 and the rear pillar 163.
  • the cabin 16 has a windshield 165 located in front of the driver's seat 15.
  • the windshield 165 is provided between the left and right front pillars 162.
  • the cabin 16 has openable and closable doors 166 on both sides in the vehicle width direction.
  • the doors 166 are provided between the front pillars 162 and the rear pillars 163.
  • a step 167 (see FIG. 5 ) is provided on one side (left side) of the cabin 16 in the vehicle body width direction.
  • the step 167 is a member on which an operator who gets on and off the cabin 16 places his or her feet.
  • a cover 111 and a bonnet 34 are provided in front of the cabin 16. As shown in Fig. 2 and Fig. 6, the dimensions of the cover 111 and the bonnet 34 in the vehicle width direction are each smaller than the dimension of the cabin 16 in the vehicle width direction. The dimension of the bonnet 34 in the vehicle width direction is smaller than the dimension of the cover 111 in the vehicle width direction.
  • the work vehicle 10 of this embodiment has a cabin 16, but does not necessarily have to have the cabin 16.
  • the work vehicle 10 may have a canopy or ropes instead of the cabin 16. If the work vehicle 10 does not have a cabin 16, the tank unit 21 is supported by the mounting frame 17 and positioned above the driver's seat 15.
  • the traveling device 12 has front wheels 121 and rear wheels 122 (see FIG. 6 ).
  • the front wheels 121 are provided on the left and right sides of the front part of the vehicle body 11.
  • the rear wheels 122 are provided on the left and right sides of the rear part of the vehicle body 11.
  • the maximum dimension in the vehicle width direction of the left and right rear wheels 122 is greater than the maximum dimension in the vehicle width direction of the left and right front wheels 121.
  • the maximum dimension in the vehicle width direction of the left and right rear wheels 122 becomes the maximum vehicle width dimension of the work vehicle 10.
  • One or both of the front wheels 121 and the rear wheels 122 rotate by the power of the motor 31.
  • One or both of the front wheels 121 and the rear wheels 122 (drive wheels) that rotate by the power of the motor 31 may be crawlers (crawlers).
  • the drive device 14 is configured to include the fuel cell 24 , the battery unit 30 , and the motor 31 .
  • the fuel cell 24 is located on a chassis 41 near the front of the vehicle body 11 (see FIG. 9).
  • the motor 31 is located behind the fuel cell 24 (see FIG. 8).
  • the battery unit 30 is located toward the outer side in the vehicle width direction of the vehicle body 11 (see FIG. 1).
  • the battery unit 30 is attached to the chassis 41 by a support structure 37.
  • the fuel cell 24 generates electricity using hydrogen gas as fuel. In other words, the fuel cell 24 generates electricity using hydrogen gas to obtain the electricity to rotate the motor 31.
  • the fuel cell 24 (see FIG. 9) has a battery casing 241 that is substantially rectangular and box-shaped, and a fuel cell stack 242 that is provided inside the battery casing 241.
  • the fuel cell stack 242 has a number of battery cells.
  • the battery cell has a positive electrode and a negative electrode. The multiple single cells are stacked. The electricity generated by each battery cell is collected and output to the battery unit 30.
  • the motor 31 has a rotating rotor and a stator having multiple coils.
  • the output shaft of the motor 31 is connected to a power transmission mechanism 333 in the gear case 33 (see FIG. 8).
  • the motor 31 is located behind the fuel cell 24 and below the second radiator 49 (see FIG. 9).
  • the tank unit 21 has a tank 13 and a tank case 211 that houses the tank 13.
  • the tank 13 is a substantially cylindrical high-pressure container.
  • the tank 13 is made of fiber-reinforced resin reinforced with carbon fiber or glass fiber, or the like.
  • three tanks 13 are fixed to the tank case 211 with the axial direction of their cylindrical portions parallel to the vehicle width direction.
  • the number of tanks 13 is not limited to three.
  • the tank case 211 is a box capable of housing one or more tanks 13.
  • the tank case 211 has a box shape that covers the entire tank 13 it houses.
  • the tank case 211 has an opening/closing door 213 (see FIG. 1) on one or both sides in the vehicle width direction, and opens in the vehicle width direction.
  • the tank case 211 is installed above the roof 164, spaced apart from the roof 164 in the vertical direction.
  • the tank case 211 is fixed to the upper frame portion 171 of the mounting frame 17.
  • the tank case 211 is made of metal such as aluminum or steel, and protects the tank 13 from external thermal and physical influences.
  • the tank 13 is positioned above the cabin 16 (driver's seat 15). This allows for a high degree of freedom in the placement of the fuel cell 24, charging section 25, motor 31, and battery unit 30 in the vehicle body 11.
  • a conventional work vehicle with an internal combustion engine into a work vehicle 10 having a fuel cell 24 and motor 31 as in this embodiment, there is no need to significantly change the placement and configuration of each piece of equipment.
  • the tank 13 is connected to the rear pipe 22r and the front pipe 22f via the valve unit 212 (see FIG. 9).
  • the rear pipe 22r (see FIG. 3) is a gas inlet pipe that connects the hydrogen gas filling port 26 to the valve unit 212, and guides the hydrogen gas introduced into the filling port 26 to the tank 13.
  • the front pipe 22f (see FIG. 2) is a gas outlet pipe that connects the fuel cell 24 to the valve unit 212, and guides the hydrogen gas stored in the tank 13 to the fuel cell 24.
  • the tank 13 stores the hydrogen gas introduced into the filling port 26 from outside the vehicle and supplies it to the fuel cell 24.
  • the valve unit 212 has an opening/closing valve, a pressure reducing valve, etc., and adjusts the hydrogen gas stored in the tank 13 to a predetermined flow rate and guides it to the fuel cell 24 through the front pipe 22f.
  • the mounting frame 17 (see FIG. 1 ) is a frame structure for mounting the tank 13 on the vehicle body 11.
  • the mounting frame 17 is made of steel.
  • the mounting frame 17 in this embodiment has an upper frame portion 171 that supports the tank 13, and a first front frame portion 172, a second front frame portion 175, and a rear frame portion 173 as frames for supporting the upper frame portion 171.
  • a tank case 211 is attached to the upper frame portion 171.
  • the upper frame portion 171 supports the tank 13 via the tank case 211.
  • the specific configuration of the mounting frame 17 will be described later.
  • the filling section 25 is provided on the rear frame section 173 (see FIG. 3).
  • the filling section 25 has a filling port 26 to which a gas filling nozzle of a hydrogen gas supply device (not shown) installed outside the vehicle is connected when filling the tank 13 with hydrogen gas.
  • the work vehicle 10 (see FIGS. 4 and 5) has a cooling system that uses a coolant to cool the fuel cell 24, the motor 31, the boost circuit 80, the inverter 81, the DC/DC converters 82, 83, etc.
  • the work vehicle 10 has a first radiator 48 and a second radiator 49. As shown in FIG. 9, the first radiator 48 is located in front of the fuel cell 24, and the second radiator 49 is located behind the fuel cell 24.
  • the first radiator 48 is a radiator for cooling devices other than the fuel cell 24.
  • the second radiator 49 is a radiator for cooling the fuel cell 24.
  • the first radiator 48 is connected, via a first cooling flow path (not shown) having a circulation pump, to electrical equipment (heat-generating components) that require cooling, such as the motor 31, the boost circuit 80 (see FIG. 5), the inverter 81, and the DC/DC converters 82, 83.
  • the first radiator 48 cools the coolant supplied through the first cooling flow path by heat exchange with the outside air.
  • the second radiator 49 is connected to the fuel cell 24 via a second cooling passage (not shown) having a circulation pump.
  • the second radiator 49 cools the coolant supplied through the second cooling passage by heat exchange with the outside air.
  • the first radiator 48 has a first fan 481 (see FIG. 9).
  • the second radiator 49 has a second fan 491.
  • the first fan 481 and the second fan 491 rotate to pass air through the first radiator 48 and the second radiator 49, promoting heat exchange with the coolant.
  • the battery unit 30 stores the electric power generated by the fuel cell 24 and supplied to the motor 31.
  • the battery unit 30 has a battery (battery pack) 300 and a housing 307 that houses the battery 300.
  • the battery 300 temporarily stores the electric power generated by the fuel cell 24 and outputs the stored electric power to electrical devices such as the motor 31.
  • the battery 300 is composed of multiple battery cells.
  • the battery 300 is a charge-discharge type secondary battery such as a lithium ion battery or a lead storage battery.
  • the work vehicle 10 has a junction box 75.
  • the junction box 75 is an electric connection box for relaying and connecting and distributing the electric power output from the battery unit 30.
  • the fuel cell 24 is connected to an inverter 81 (see FIG. 5 ) via a boost circuit.
  • the battery unit 30 is connected to the inverter 81 through a junction box 75.
  • the inverter 81 is electrically connected to the motor 31.
  • the inverter 81 converts the DC power output from the boost circuit into three-phase AC power and outputs it to the motor 31.
  • the work vehicle 10 has low-voltage electrical equipment that operates at a lower voltage than the motor 31.
  • the low-voltage electrical equipment is supplied with power stepped down by a step-down circuit through a junction box 75.
  • the low-voltage electrical equipment of the work vehicle 10 is the battery unit 30, radiators 48, 49, and air conditioning device 74 (see FIG. 9).
  • the work vehicle 10 has a first DC/DC converter 82 and a second DC/DC converter 83 as the step-down circuit (see FIG. 5).
  • the work vehicle 10 has a positioning device 65 (see FIG. 2).
  • the positioning device 65 receives satellite signals transmitted from multiple GNSS satellites and performs positioning based on the satellite signals.
  • GNSS is a general term for satellite positioning systems such as GPS (Global Positioning System), QZSS (Quasi-Zenith Satellite System: e.g., "Michibiki"), GLONASS ( Russia), Galileo (Europe), and BeiDou (China).
  • the positioning device 65 has a receiver 65a that receives satellite signals, and a calculation processing unit 65b.
  • the receiver 65a has an antenna that receives signals from GNSS satellites.
  • the calculation processing unit 65b calculates and determines the position (coordinates) of the work vehicle 10 based on the signals received by the receiver 65a. In this way, the positioning device 65 obtains position information that indicates the position of the work vehicle 10.
  • the mounting frame 17 (see Figs. 1 and 8) is a member for mounting the tank 13, which stores hydrogen gas, on the vehicle body 11.
  • the mounting frame 17 is fixed to the vehicle body 11.
  • the vehicle body 11 has a first front support portion 51, a second front support portion 53, and a rear support portion 52 (see Fig. 10) as support portions.
  • Fig. 10 is a perspective view of the vehicle body 11 with the right rear wheel 122 removed.
  • the first front support parts 51 are located on the front side of the vehicle body 11, on both sides in the vehicle width direction.
  • the second front support parts 53 are located in front of the front support parts 51, on both sides in the vehicle width direction.
  • the first front support parts 51 and the second front support parts 53 are beam-shaped members that protrude from the front frame 32 on both sides in the vehicle width direction.
  • the vehicle body 11 has the front frame 32 and the gear case 33.
  • the gear case 33 has a main case 337 located in the center in the vehicle width direction, and an axle case 335 for the rear wheels 122.
  • the axle case 335 is fixed to the main case 337.
  • the rear support portions 52 are located on both sides in the vehicle width direction at the rear of the vehicle body 11. In the present embodiment, the rear support portions 52 are connecting brackets 46 fixed onto the axle case 335.
  • the mounting frame 17 (see FIGS. 1 and 8 ) has an upper frame portion 171 , a pair of left and right first front frame portions 172 , a pair of left and right second front frame portions 175 , and a pair of rear frame portions 173 .
  • the upper frame portion 171 is a rectangular frame constituted by four straight members on the front, rear, left and right sides.
  • the upper frame portion 171 supports the tank 13.
  • a tank case 211 is attached to the upper frame portion 171, and the tank 13 is housed inside the tank case 211.
  • the first front frame portions 172 are pillar members that extend upward from the front support portions 51 on both sides in the vehicle width direction.
  • the pair of first front frame portions 172 are connected to both sides in the vehicle width direction of the front portion 171f of the upper frame portion 171.
  • the pair of first front frame portions 172 support the front portion 171f of the upper frame portion 171 from below on both sides in the vehicle width direction.
  • the first front frame portions 172 have a linear shape that extends from the front support portions 51 toward the upper frame portion 171.
  • the rear frame portion 173 is composed of multiple straight members.
  • the rear frame portion 173 extends upward from each of the rear support portions 52 (connecting brackets 46 shown in FIG. 10) on both sides in the vehicle width direction.
  • the rear frame portion 173 is connected to both sides in the vehicle width direction of the rear portion 171r of the upper frame portion 171.
  • the rear frame portion 173 supports the rear portion 171r of the upper frame portion 171 from below on both sides in the vehicle width direction.
  • the upper frame portion 171 supporting the tank 13 is supported on both sides in the vehicle width direction by the chassis 41 via a first front frame portion 172 and a rear frame portion 173.
  • the load of the tank 13 is supported by the chassis 41 through the mounting frame 17.
  • a portion of the weight of the tank 13 is supported by the first front frame portion 172.
  • the first front frame portion 172 is a long member, but has a linear shape and does not have any bent portions along the way, and is therefore unlikely to buckle even when a compressive force is applied.
  • the second front frame portion 175 (see Figures 1 and 8) is a pillar member that extends upward and rearward from each of the second front support portions 53 on both sides in the vehicle width direction.
  • the pair of second front frame portions 175 are connected to both sides in the vehicle width direction of the front portion 171f of the upper frame portion 171.
  • the second front frame portion 175 may be connected to the upper portion of the first front frame portion 172 instead of the upper frame portion 171.
  • the first front frame portion 172 and the second front frame portion 175 are fixed to the front frame 32 , which is part of the chassis 41 , via the first front support portion 51 and the second front support portion 53 , respectively.
  • the rear support portion 52 is fixed to an axle case 335 of the gear case 33 , which is another part of the chassis 41 , via the rear support portion 52 (connecting bracket 46 ).
  • the chassis 41 forms a framework for mounting the bonnet 34, the drive unit 14, etc., and has a strong structure and high rigidity.
  • the tank 13 is supported by the chassis 41 via the mounting frame 17, allowing the work vehicle 10 to travel stably.
  • the mounting frame 17 has a pair of inclined frame portions 174.
  • the inclined frame portions 174 extend rearward and upward from a portion 172p of the first front frame portion 172, and are connected to a portion 171b of the upper frame portion 171.
  • the inclined frame portions 174 are straight members.
  • the inclined frame portions 174 increase the rigidity of the mounting frame 17 in the fore-and-aft direction of the vehicle.
  • the rear frame portion 173 (see FIG. 10) has a pair of first frame members 173a, beam members 173b, and a pair of second frame members 173c.
  • the pair of first frame members 173a extend upward from each of the rear support portions 52 (connecting brackets 46) on both sides in the vehicle width direction.
  • the beam members 173b connect the pair of first frame members 173a in the vehicle width direction.
  • the pair of second frame members 173c extend upward from positions on both sides of the beam members 173b in the vehicle width direction, and connect to the rear portions 171r of the upper frame portion 171.
  • the rear frame portion 173 is reinforced by the beam members 173b.
  • the spacing between the pair of first frame members 173a and the spacing between the pair of second frame members 173c are different.
  • the pair of first frame members 173a are located between the rear wheels 122 on both sides in the vehicle width direction, and the spacing between them is narrow.
  • the pair of second frame members 173c are located behind the driver's seat 15, and the spacing between them is wide to ensure visibility.
  • the cabin 16 has a rear window 161 that opens rearward with its upper portion as a fulcrum.
  • the pair of second frame members 173c are spaced widely apart in the vehicle width direction and are positioned on both sides in the vehicle width direction of the rear window 161 when it is open. The opening and closing of the rear window 161 is not hindered by the rear frame portion 173.
  • the first frame member 173a extends upward and rearward from the rear support portion 52.
  • the second frame member 173c extends upward and forward from the beam member 173b.
  • the rear frame portion 173 has a shape that matches the shape of the rear of the work vehicle 10.
  • the driver's seat 15 is mounted on a mount 168 of the cabin 16.
  • the gear case 33 forming the rear of the chassis 41 has an axle case 335 for the rear wheels 122.
  • a connecting bracket 46 is fixed onto the axle case 335.
  • the connecting bracket 46 has an elastic bushing 45.
  • the mount 168 on which the driver's seat 15 is placed is attached to the connecting bracket 46 via the elastic bushing 45.
  • the driver's seat 15 is mounted on the chassis 41 (axle case 335) via the connecting bracket 46 which has the elastic bushing 45.
  • the rear frame portion 173 of the mounting frame 17 is directly fixed to the chassis 41 (axle case 335) via the connecting bracket 46 (rear support portion 52).
  • the first front frame portion 172 and the second front frame portion 175 of the mounting frame 17 are also directly fixed to the chassis 41 (front frame 32) via the first front support portion 51 and the second front support portion 53.
  • the driver's seat 15 is mounted on the chassis 41 via the elastic bushing 45, whereas the mounting frame 17 is rigidly connected to the chassis 41.
  • the chassis 41 and the mounting frame 17 form a single rigid body.
  • the mounting frame 17 supporting the tank 13 does not wobble because it behaves in the same manner as the chassis 41.
  • the elastic bushing 45 is interposed between the driver's seat 15 and the chassis 41, providing a comfortable ride.
  • the connecting bracket 46 connects the rear frame portion 173, which is part of the mounting frame 17.
  • the driver's seat 15 is attached to the connecting bracket 46 via an elastic bushing 45.
  • the driver's seat 15 and the rear frame portion 173 are supported on the vehicle body 11 (chassis 41) via the connecting bracket 46.
  • the connecting bracket 46 is shared as an attachment member for the driver's seat 15 and part of the mounting frame 17 (the rear frame portion 173).
  • the upper frame portion 171 is located above the driver's seat 15 that is mounted on the vehicle body 11 (see FIGS. 4, 5 and 9).
  • the work vehicle 10 has a cabin 16, and the upper frame portion 171 is located above the cabin 16.
  • the first front frame portion 172 is located in front of the driver's seat 15 (cabin 16).
  • the tank 13 is located above the driver's seat 15 (cabin 16) in a range to the rear of the first front frame portion 172 located in front of the driver's seat 15 (cabin 16).
  • the rear frame portion 173 is located behind the driver's seat 15 (cabin 16).
  • the tank 13 is located above the driver's seat 15 (cabin 16) in a forward range from the rear frame portion 173 located behind the driver's seat 15 (cabin 16).
  • the distance between the first front frame portion 172 and the rear frame portion 173 is wide, allowing flexibility in the installation space of the tank 13.
  • the tank 13 is housed in a tank case 211.
  • the upper frame portion 171 is located above the cabin 16, and the front end 211f of the tank case 211 is located in front of the cabin 16. This arrangement allows the position of the tank 13 in the vehicle's fore-and-aft direction to be closer to the vehicle's center of gravity.
  • the rear frame portion 173 is located within the vehicle width range of the rear wheels 122 on both sides in the vehicle width direction.
  • the first frame members 173a of the rear frame portion 173 are located between the rear wheels 122 on both sides in the vehicle width direction.
  • the rear frame portion 173 (see FIG. 4) is located within the range of the rear wheels 122 in the vehicle front-rear direction. As a result of the above, the rear frame portion 173 does not protrude outward in the vehicle width direction beyond the rear wheels 122, and does not protrude rearward beyond the rear wheels 122.
  • the cabin 16 (see Figures 4 and 5) has a pair of front pillars 162 on both sides in the vehicle width direction, and a pair of rear pillars 163 on both sides in the vehicle width direction.
  • the first front frame portion 172 is a separate member from the front pillars 162.
  • the rear frame portion 173 is a separate member from the rear pillars 163. Therefore, the cabin 16 does not need to bear the weight of the tank 13, and the front pillars 162 and rear pillars 163 of the cabin 16 do not need to be made of highly rigid members.
  • the front pipe 22f which is the hydrogen pipe 22
  • the front pipe 22f is provided along the first front frame portion 172 of the mounting frame 17. Furthermore, the front pipe 22f is provided along the inclined frame portion 174.
  • the rear pipe 22r which is the hydrogen pipe 22, is provided along the second frame material 173c of the rear frame portion 173.
  • the first front frame portion 172, the inclined frame portion 174, and the rear frame portion 173 are used as members for attaching the hydrogen pipe 22.
  • the hydrogen pipes 22 (front pipes 22 f and rear pipes 22 r ) connected to the tank 13 may be provided along at least one of the first front frame portion 172 and the rear frame portion 173 .
  • the front piping 22f passes through a piping area 23f at the lower and front part of the tank unit 21 and is connected to the fuel cell 24.
  • the front piping 22f passes through the piping area 23f located on the lower surface of the tank unit 21.
  • the rear piping 22r passes through a piping region 23r located at the lower and rear side of the tank unit 21 and is connected to the filling section 25.
  • the rear piping 22r passes through a piping region 23r located at the rear surface of the tank unit 21.
  • piping regions 23f, 23r through which piping 22 (front piping 22f and rear piping 22r) connected to the tank 13 passes are provided in the lower portion 21b of the tank unit 21.
  • the lower portion 21b of the tank unit 21 is a portion below the central position in the up-down direction of the tank unit 21 (tank case 211), and also includes the bottom surface (lower surface).
  • the piping areas 23f, 23r in the tank unit 21 are located as close as possible to the hydrogen equipment (fuel cell 24, charging section 25) on the vehicle body 11, and the piping 22 is made as short as possible.
  • the front piping 22f connecting the tank 13 to the fuel cell 24 is made as short as possible
  • the rear piping 22r connecting the charging section 25 to the tank 13 is made as short as possible.
  • the piping region 23r for the rear piping 22r is located on the right side (first side in the vehicle width direction).
  • the piping region 23f for the front piping 22f is located on the left side (second side in the vehicle width direction).
  • the rear piping 22r passes through the piping region 23r at the rear right side and is connected to the tank 13.
  • the front piping 22f passes through the piping region 23f at the front left side and is connected to the fuel cell 24.
  • the rear piping 22r and the front piping 22f are efficiently laid out.
  • the front and rear piping regions 23f, 23r may both be located on the right side, or both may be located on the left side.
  • the vehicle body 11 (see FIG. 11) has a cover 111 that covers the second radiator 49, which is an on-board component located toward the front of the vehicle body 11.
  • the cover 111 has an opening 112 that allows the front pipe 22f to pass through.
  • the opening 112 is a notch provided in a portion of the cover 111, which is made of metal.
  • the opening 112 allows the front pipe 22f connected to the fuel cell 24 to not have to detour around the cover 111, making it possible to lay out the front pipe 22f as efficiently as possible.
  • the work vehicle 10 has a mounting frame 17 for mounting the tank unit 21 on the vehicle body 11.
  • the rear piping 22r is attached along a part (second frame member 173c) of the rear frame portion 173 of the mounting frame 17.
  • the rear frame portion 173 has a clamp member 221 for fixing the rear piping 22r to the second frame member 173c.
  • the clamp member 221 may be configured to attach the piping to a part of the rear frame portion 173 that serves as a fixing member, and a conventionally known part may be used.
  • the piping 22 (front piping 22f, rear piping 22r) is attached along a part of the columnar frame material (first front frame portion 172, rear frame portion 173) of the mounting frame 17.
  • the mounting frame 17 is used to support the piping 22 between the tank unit 21 and the fuel cell 24 and the filling section 25, which are the hydrogen load items.
  • the clamp members 221 secure the piping 22 to each part of the mounting frame 17 and prevent it from shifting position.
  • Each member constituting the mounting frame 17 is a hollow tubular member.
  • the piping 22 may be configured to pass through the tubular member.
  • the rear piping 22r (see FIG. 1 ) is provided outside the rear frame portion 173 and along the rear frame portion 173.
  • a portion of the rear piping 22r may pass through the inside of a portion of the rear frame portion 173, which is a hollow tubular member.
  • the frame material (tubular member) functions as a cover that protects the piping 22.
  • a portion of the front piping 22f may pass through the inside of the inclined frame portion 174 or the first front frame portion 172, which is a hollow tubular member.
  • the rear pipe 22r has a flexible pipe 222 in a part thereof (see FIG. 10).
  • the flexible pipe 222 may be any part that is flexible and allows hydrogen gas to pass through it.
  • the front pipe 22f has a flexible pipe in a part thereof.
  • the flexible pipe is of the same type as the flexible pipe 222 for the rear pipe 22r.
  • the piping 22 (rear piping 22r, front piping 22f) has flexible piping 222 in a portion thereof, which facilitates attachment of the piping 22 to the work vehicle 10.
  • the flexible piping 222 makes it possible to absorb an external force acting on the piping 22 due to vibration or the like after attachment of the piping 22.
  • the filling unit 25 has a filling port 26 to which a gas filling nozzle of a hydrogen gas supply device (not shown) installed outside the vehicle is connected when filling the tank 13 with hydrogen gas.
  • the rear piping 22r connects from the filling unit 25 (filling port 26) to the tank 13.
  • the work vehicle 10 has a mounting frame 17 for installing the tank 13 on the cabin 16.
  • the rear frame portion 173 of the mounting frame 17 has a bracket 27 as an attachment portion for attaching the filling unit 25 (filling port 26).
  • the rear frame portion 173 is a fixing member for the rear piping 22r, and also serves as an attachment member for the filling section 25.
  • the rear frame portion 173 is also part of the mounting frame 17 for mounting the tank 13 on the vehicle body 11.
  • the mounting frame 17 for mounting the tank unit 21 on the vehicle body 11 is also used as a member for attaching the filling section 25 to the vehicle body 11.
  • the tank 13 is installed above the vehicle body 11, but a bracket 27 for mounting the filling section 25 is provided at a relatively low position on the frame (rear frame section 173) connected to the vehicle body 11.
  • the hydrogen gas is supplied to the tank 13 through the rear piping 22r.
  • the rear frame portion 173 having the bracket 27 is located towards the rear of the vehicle body 11.
  • the filling section 25 (filling port 26) is located at the rear of the work vehicle 10.
  • the fuel cell 24 is located on the front side of the vehicle body 11.
  • the filling section 25 (filling port 26) is located away from the fuel cell 24, improving safety.
  • the work vehicle 10 has a driver's seat 15 mounted on a vehicle body 11, and a cabin 16 with the driver's seat 15 inside.
  • the fuel cell 24 is located in front of the cabin 16.
  • a rear frame portion 173 having a bracket 27 is located behind the cabin 16. With this arrangement, the cabin 16 is interposed between the filling section 25 (filling port 26) and the fuel cell 24, and the filling section 25 (filling port 26) is located away from the fuel cell 24.
  • the 12 is an explanatory diagram of the filling section 25 attached to the bracket 27 and its surroundings.
  • the filling section 25 has a housing 28 that houses the filling port 26.
  • the housing 28 has a case 28a and a lid 28b.
  • the case 28a has walls at the top, bottom, left, right, and front, and opens at the rear.
  • the lid 28b is openable and can close the opening of the case 28a.
  • the filling port 26 is provided on the housing 28 so as to open to the rear or side of the vehicle.
  • the rear piping 22r is connected to the filling section 25 (filling port 26) from the front of the housing 28. With this configuration, the filling port 26 is protected by the housing 28.
  • the rear pipe 22r is connected to the filling section 25 from a space formed between the housing 28 and the rear part of the vehicle body 11.
  • a connection section 29 between the rear pipe 22r and the housing 28 is not exposed to the wide space behind the vehicle, and the connection section 29 is protected.
  • the filling section 25 (filling port 26) is located behind the cabin 16 and between the rear wheels 122 on both sides in the vehicle width direction.
  • the filling section 25 (filling port 26) is protected from the left and right by the rear wheels 122 and is protected from the front by the cabin 16.
  • the rear frame portion 173 has a pair of first frame members 173a located on both sides in the vehicle width direction, and a beam member 173b as a third frame member connecting the pair of first frame members 173a in the vehicle width direction.
  • the filling portion 25 (filling port 26) is located below the beam member 173b.
  • the filling portion 25 (filling port 26) is protected from above by the beam member 173b.
  • a mounting portion (bracket 27) for the filling portion 25 (filling port 26) may be provided across both the first frame member 173a located on one side of the vehicle body in the vehicle width direction and the first frame member 173a located on the other side of the vehicle body in the vehicle width direction.
  • the work vehicle 10 of this embodiment is a tractor, and has a coupling device 43 at the rear of the vehicle body 11 (see FIG. 10).
  • the coupling device 43 is a device for coupling a separate implement, such as a tiller.
  • the bracket 27 is not located in the center in the vehicle width direction, but is positioned offset to the right side, which is one side of the vehicle width direction. Therefore, the filling port 26 is also positioned offset to the right side. Note that the bracket 27 (filling port 26) may also be positioned offset to the left side.
  • the filling section 25 (filling port 26) is located above the coupling device 43.
  • Part of the coupling device 43 may move, for example, by changing its posture or position. Even in this case, the filling section 25 (filling port 26) is unlikely to be hidden by the coupling device 43. This makes it easier to fill the vehicle with hydrogen gas through the filling port 26.
  • the vehicle body 11 has a connecting bracket 46 for attaching the mount portion 168 of the cabin 16.
  • the first frame member 173a of the rear frame portion 173 is connected to the connecting bracket 46.
  • the first frame member 173a has a bracket 27 for attaching the filling portion 25 (filling port 26).
  • the connecting bracket 46 for attaching the cabin 16 is also used as a member for attaching the filling portion 25 (filling port 26) to the vehicle body 11 via the rear frame portion 173.
  • [Discharge path 35] 13 is an explanatory diagram of the fuel cell 24 and the exhaust path 35.
  • the exhaust path 35 is connected to the fuel cell 24 and exhausts water or water vapor generated by the operation of the fuel cell 24 to the outside.
  • the exhaust path 35 has an exhaust pipe 351 and a connection pipe 353.
  • the connection pipe 353 is a pipe that connects the fuel cell 24 and the exhaust pipe 351.
  • the exhaust pipe 351 has an exhaust port 352, and the water or water vapor is exhausted from the exhaust port 352 to the outside.
  • the exhaust port 352 opens towards the rear of the vehicle. When water or water vapor is exhausted from the exhaust pipe 351 while the work vehicle 10 is traveling, a headwind does not impede the exhaust.
  • the discharge pipe 351 is located between the front and rear wheels 121 and 122, not at the rear of the body 11 on the rear wheel 122 side.
  • the space between the front and rear wheels 121 and 122 is used as the installation space for the discharge pipe 351.
  • the fuel cell 24 is located closer to the front wheels 121 than to the rear wheels 122 in the vehicle's fore-and-aft direction.
  • the fuel cell 24 is located above the axle of the front wheels 121.
  • the exhaust pipe 351 is located between the front wheels 121 and the rear wheels 122.
  • the fuel cell 24 and the exhaust pipe 351 are close to each other in the fore-and-aft direction, and the connecting pipe 353 is not unnecessarily long. It is possible to lay out the exhaust path 35, including the exhaust pipe 351, as efficiently as possible.
  • the fuel cell 24, which is a heavy load, is located above the axle of the front wheels 121, making the work vehicle 10 stable.
  • the exhaust pipe 351 is preferably installed near the fuel cell 24, but is located behind the fuel cell 24, not below it. This ensures that the exhaust pipe 351 does not interfere with the axle of the front wheels 121.
  • the discharge pipe 351 is located at a position lower than the fuel cell 24. Water generated in the discharge path 35 easily reaches the discharge pipe 351 due to its own weight. Because the discharge pipe 351 is located under the vehicle body 11, it is close to the road surface, and the discharged water falls onto the road surface.
  • the work vehicle 10 has a mounting frame 17 for mounting the tank 13 on the vehicle body 11.
  • the vehicle body 11 has a chassis 41 and a front support portion 51.
  • the chassis 41 mounts the fuel cell 24 at a position toward the front.
  • the front support portion 51 is fixed to a part of the chassis 41 behind the fuel cell 24.
  • the front support portion 51 supports the first front frame portion 172, which is part of the mounting frame 17, from below.
  • the fuel cell 24 is located in front of the first front frame portion 172 and the front support portion 51.
  • the exhaust pipe 351 is located behind the front support portion 51. In other words, the fuel cell 24 and the exhaust pipe 351 are located in front of and behind the front support portion 51, with the front support portion 51 in between.
  • the connection pipe 353 passes from the fuel cell 24 under the front support part 51 and connects to the discharge pipe 351. With the above-mentioned configuration, the discharge pipe 351 is located under the chassis 41 (front frame 32) and close to the road surface, and the discharged water falls onto the road surface.
  • the connection pipe 353 has a first connection port 355 on the upstream side that is connected to the fuel cell 24, and a second connection port 356 on the downstream side that is connected to the exhaust pipe 351.
  • the connection pipe 353 has a first pipe 353a that extends rearward from the fuel cell 24, a second pipe 353b that extends downward from the rear end of the first pipe 353a, and a third pipe 353c that extends rearward from the lower end of the second pipe 353b.
  • the first connection port 355 is located at the front end of the first pipe 353a
  • the second connection port 356 is located at the rear end of the third pipe 353c.
  • the third pipe 353c is lower than the second pipe 353b located upstream of it, and the second pipe 353b is lower than the first pipe 353a located upstream of it.
  • the second connection port 356 is located lower than the first connection port 355. In this way, each portion of the pipe between the first connection port 355 and the second connection port 356 is lower than the portion located upstream of that portion. Therefore, even if water is generated in the connection pipe 353, the water is carried to the discharge pipe 351 by its own weight.
  • each section of the pipe between the first connection port 355 and the second connection port 356 may be at the same height as the section upstream of that section.
  • the discharge pipe 351 is located below the driver's seat 15.
  • the position of the discharge pipe 351 does not have to be directly below the driver's seat 15.
  • the discharge pipe 351 may be located below the driver's seat 15, and may be positioned offset to one side in the vehicle width direction as in this embodiment, rather than in the center in the vehicle width direction. This configuration prevents the driver's seat from getting wet.
  • the work vehicle 10 of this embodiment has a step 167 for the worker to get on and off the driver's seat 15 (cabin 16) (see FIG. 5).
  • the discharge pipe 351 is located below the step 167. Note that an upper part of the discharge pipe 351 and a lower part of the step 167 may be at the same height. In other words, the discharge pipe 351 being located below the step 167 means that the lowest part of the discharge pipe 351 is located below the lowest part of the step 167.
  • the discharge pipe 351 only needs to be located below the step 167, and may be offset in the vehicle width direction as in this embodiment, rather than directly below the step 167. With this configuration, the discharge pipe 351 is located close to the road surface, and discharged water does not fall onto the road surface and wet the driver's seat 15 and the step 167.
  • the arrangement of the discharge path 35 in the vehicle width direction of the vehicle will be described.
  • the drive shaft 61 for driving the work vehicle 10 and the gear case 33 for shifting etc. connected to the drive shaft 61 are located in the central area in the vehicle width direction under the vehicle body 11 (see FIG. 7 ). Therefore, the discharge pipe 351 is positioned closer to the right side, which is one side in the vehicle width direction, than the center in the vehicle width direction.
  • the discharge pipe 351 is provided to avoid the drive shaft 61 and the gear case 33.
  • the exhaust pipe 351 is located below the front part of the gear case 33 and closer to the right side, which is one side in the vehicle width direction, than the center in the vehicle width direction.
  • the battery unit 30 is located toward the outside in the vehicle width direction.
  • the battery unit 30 is located on the right side in the vehicle width direction.
  • the discharge pipe 351 is located toward the center of the battery unit 30 in the vehicle width direction. In other words, the discharge pipe 351 is located between the equipment in the central area in the vehicle width direction (drive shaft 61 and gear case 33) and the battery unit 30.
  • the discharge pipe 351 is installed in the empty space next to the battery unit 30.
  • the work vehicle 10 has a support structure 37 for supporting the battery unit 30 on the vehicle body 11.
  • the support structure 37 has an auxiliary member 371 for attaching the discharge pipe 351.
  • the support structure 37 for the battery unit 30 also serves as a member for attaching the discharge pipe 351. The specific configuration of the support structure 37 will be described later.
  • the work vehicle 10 has a positioning device 65, which acquires position information indicating the position of the work vehicle 10.
  • the work vehicle 10 also has a control device (not shown) that controls the traveling device 12 and the drive device 14, etc., and the control device has a storage device consisting of a memory, etc.
  • the storage device stores map information about a map that includes the positions of garages, roads, fields, etc.
  • the discharge path 35 (see FIG. 13) has a drain valve 354 and a control device 70 that controls the opening and closing of the drain valve 354.
  • the control device 70 is configured with an ECU (Electronic Control Unit).
  • the control device 70 controls the opening and closing operation of the drain valve 354 using the position information and the map information.
  • the work vehicle 10 determines whether it is in a garage or outside the garage, such as a field, based on the position information and map information. If the work vehicle 10 is in a garage and water or water vapor should not be discharged to the outside, the control device 70 closes the drain valve 354. If the work vehicle 10 is on a road or in a field and water or water vapor may be discharged, the control device 70 opens the drain valve 354 and discharges the water or water vapor to the outside.
  • the control device 70 enables the exhaust path 35 to automatically exhaust water or water vapor to the outside.
  • an operation unit such as an exhaust button may be provided on an operation panel installed in the cabin 16, and the control device 70 may control the opening and closing of the drain valve by the driver operating the operation unit.
  • FIG. 7 The support structure 37 (see FIG. 8) is a member for attaching the battery unit 30 to a position toward the outside in the vehicle width direction of the vehicle body 11.
  • FIG 14 is a perspective view of the battery unit 30 and discharge pipe 351 supported by the support structure 37.
  • FIG 15 is an exploded perspective view of the battery unit 30, discharge pipe 351, and support structure 37.
  • FIG 16 is a front view of the battery unit 30 and discharge pipe 351 supported by the support structure 37.
  • FIG 17 is a front view showing the battery unit 30 separated from the support structure 37.
  • the support structure 37 has a lower support 38 that supports the battery unit 30 from below, and a lateral support 39 that supports the battery unit 30 from one side (left side) in the vehicle width direction.
  • the lateral support 39 holds a side wall 301 on one side (left side) in the vehicle width direction of the battery unit 30.
  • Each of the lower support 38 and the lateral support 39 is formed by assembling a plurality of steel members by welding or the like.
  • the battery unit 30 is located toward the outer side (right side) in the vehicle width direction of the vehicle body 11.
  • the battery unit 30 is attached to the vehicle body 11 in a state in which it is supported from below by a lower support body 38 and held in the vehicle width direction by lateral support bodies 39.
  • the lateral support 39 (see Figures 15, 16 and 17) is divided into a fixed frame 391 and a detachable frame 392. That is, the lateral support 39 has the fixed frame 391, the detachable frame 392, and a removable fastening member that fastens the detachable frame 392 to the fixed frame 391.
  • the fastening member is a bolt (first bolt) 390.
  • bolts 390 fasten the detachable frame 392 to the fixed frame 391 from above.
  • Nuts 395 that engage with the bolts 390 (see FIG. 17 ) are fixed to the underside of the fixed frame 391. Even when the bolts 390 are removed, the nuts 395 remain on the fixed frame 391. This makes it easier to fasten the bolts 390 again.
  • the components of the support structure 37 other than the detachable frame 392 and the bolts 390 are fixed to the vehicle body 11.
  • the components are fixed to a part (the gear case 33) of the chassis 41 of the vehicle body 11.
  • the fixed frame 391 is fixed to the vehicle body 11 (gear case 33) in advance
  • the detachable frame 392 is fixed to the side wall 301 of the battery unit 30 in advance.
  • Bolts 390 fasten a detachable frame 392 fixed to the battery unit 30 to a fixed frame 391 fixed to the vehicle body 11. Fastening with bolts 390 is performed from above, not from the center side in the vehicle width direction (the right side in the case of Figure 17). This makes it easy to attach the battery unit 30 to the vehicle body 11.
  • the detachable frame 392 may be fastened to the fixed frame 391 from below by bolts 390 or from the outside in the vehicle width direction (the left side in the case of Figure 17).
  • the bolt 390 is fastened from the center side in the vehicle width direction (the right side in the case of FIG. 17)
  • the work is difficult.
  • the bolt 390 is fastened from above, below, or from the outside in the vehicle width direction (the left side in the case of FIG. 17), the work is easy.
  • a junction box 75 is mounted on the battery unit 30.
  • the junction box 75 is an electric connection box for relaying connections and distributing the power output from the battery unit 30.
  • the junction box 75 is mounted on the vehicle body 11 together with the battery unit 30 by the support structure 37.
  • the junction box 75 is attached to the battery unit 30 by bolts (not shown). By removing the bolts, the junction box 75 can be removed from the battery unit 30. By removing the junction box 75 from the battery unit 30, the bolts 390 can be easily fastened from the space above the battery unit 30.
  • the detachable frame 392 has a bracket 393 located on top of the fixed frame 391 (see FIGS. 16 and 17).
  • the bolts 390 can be used to fasten the bracket 393 to the fixed frame 391 from above the bracket 393.
  • the bracket 393 is located above the fixed frame 391. This allows the bolts 390 to be fastened from above the bracket 393, improving workability. Since the bolts 390 are detachable, the battery unit 30 can be removed from the vehicle body 11 together with the detachable frame 392, facilitating maintenance work on the battery unit 30.
  • the lower support 38 has a mounting frame 381 on which the battery unit 30 is placed, and a removable second fastening member.
  • the second fastening member is a bolt (second bolt) 380.
  • the bolt 380 can fasten the bottom wall 302 of the battery unit 30 to the mounting frame 381.
  • the battery unit 30 is fixed to the lower support 38 by the bolt 380 while placed on the lower support 38 (see FIG. 16).
  • An operator can fasten the second bolt 380 from below.
  • the second bolt 380 can be removed from the mounting frame 381 to perform maintenance work on the battery unit 30.
  • the battery unit 30 is positioned by being fastened to the mounting frame 381 by the second bolt 380.
  • the detachable frame 392 fixed to the side wall 301 is positioned so that it can be fastened to the fixed frame 391 fixed to the vehicle body 11 by the first bolt 390.
  • the hole provided in the bracket 393 of the detachable frame 392 and the screw hole of the nut 395 fixed to the fixed frame 391 are aligned vertically.
  • the fixed frame 391 and the detachable frame 392, which were separated, are aligned for fastening the first bolt 390. This makes it easy to fasten the first bolt 390.
  • the horizontal support 39 of the support structure 37 is divided into a fixed frame 391 and a detachable frame 392 (see FIG. 15).
  • the fixed frame 391 has a fixed member 399 that is fixed to the vehicle body 11, and a first side pillar 398 that is integral with the fixed member 399.
  • the first side pillar 398 has an elongated shape that extends in the front-rear direction of the vehicle.
  • the detachable frame 392 has a second side pillar 394 that is provided along the side wall 301 of the battery unit 30 and fixed to the side wall 301, and a number of brackets 393 that are integral with the second side pillar 394.
  • the bracket 393 rests on the first side pillar 398.
  • the second side pillar 394 has an elongated shape that extends in the fore-and-aft direction of the vehicle.
  • the bolts 390 can fasten the brackets 393 to the first side pillar 398 from above each of the multiple brackets 393.
  • first side pillar 398 and the second side pillar 394 are each long in the vehicle's fore-and-aft direction according to that length.
  • bolts 390 fasten the detachable frame 392 to the fixed frame 391.
  • the brackets 393 are provided at intervals and distributed in the vehicle's fore-and-aft direction.
  • the vehicle body 11 has a chassis 41 that is long in the front-rear direction of the vehicle and is located in the center of the vehicle width direction.
  • the lower support 38 of the support structure 37 (see Figs. 15, 16, and 17) has a lower fixing member 382 that is fixed to a part of the chassis 41, a plurality of arms 383 (two in the illustrated example), and a plurality of lower pillars 384 (three in the illustrated example).
  • the lower fixing member 382 has a mounting frame 386 that is fixed to a part of the chassis 41 , and a plurality of connecting posts 387 that extend downward from the mounting frame 386 .
  • the arm 383 is connected to a connecting post 387 that is a part of the lower fixing member 382.
  • the arm 383 is a member that extends outward in the vehicle width direction from a lower part of the connecting post 387.
  • the lower pillar 384 is a member that connects the multiple arms 383 in the front-rear direction of the vehicle.
  • the lower pillar 384 has a mounting surface 385 on its upper surface on which the battery unit 30 is placed.
  • the arm 383 may also have the mounting surface 385 on its upper surface. In other words, one or both of the lower pillar 384 and the arm 383 have the mounting surface 385 on their upper surface on which the battery unit 30 is placed.
  • the load of the battery unit 30, which is a heavy object, is supported by the chassis 41 via the lower support 38.
  • the position of the arm 383 is lowered by the connecting pillar 387, making it possible to lower the position of the battery unit 30.
  • This configuration contributes to a lower center of gravity for the work vehicle 10.
  • the lower support body 38 supports the discharge pipe 351 in addition to the battery unit 30.
  • the lower support body 38 has an auxiliary member 371 for attaching the discharge pipe 351.
  • the auxiliary member 371 is a member for attaching the discharge pipe 351 next to the battery unit 30 in the vehicle width direction.
  • the discharge pipe 351 is fixed to the auxiliary member 371 with a bolt.
  • the auxiliary member 371 is connected to a connecting column 387. Due to the configuration of the lower support 38, the space next to the battery unit 30 is effectively utilized as a location for installing the exhaust pipe 351.
  • the second front frame portion 175 may be omitted from the mounting frame 17 for mounting the tank 13 on the vehicle body 11.
  • the members constituting the mounting frame 17 may have a shape other than that shown in the drawings.
  • the shape of the filling section 25 may be other than that shown in the figure.
  • the path of the rear pipe 22r from the filling section 25 to the tank 13 and the path of the front pipe 22g from the tank 13 to the fuel cell 24 may be other than that shown in the figure.
  • the discharge path 35 may have a shape other than that shown in the drawing.
  • the discharge pipe 351 is attached to a part of the support structure 37 that supports the battery unit 30, but may be attached to the vehicle body 11 by a separate member other than the support structure 37.
  • the members constituting the support structure 37 may have shapes other than those shown in the drawings.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
PCT/JP2024/017628 2023-06-30 2024-05-13 作業車両 Ceased WO2025004561A1 (ja)

Priority Applications (3)

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JP2025529490A JPWO2025004561A1 (https=) 2023-06-30 2024-05-13
EP24831434.6A EP4737169A1 (en) 2023-06-30 2024-05-13 Work vehicle
US19/409,007 US20260084520A1 (en) 2023-06-30 2025-12-04 Work vehicle

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JP2023013186A (ja) 2021-07-15 2023-01-26 株式会社クボタ 作業機
JP2023013187A (ja) * 2021-07-15 2023-01-26 株式会社クボタ 燃料電池システム及びそれを備えた作業機、並びに燃料電池システムの制御方法
JP2023107634A (ja) 2022-01-24 2023-08-03 富士フイルム株式会社 情報処理装置、情報処理システム、情報処理方法及びプログラム
WO2024009817A1 (ja) * 2022-07-07 2024-01-11 株式会社クボタ 作業車両

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JP2017128202A (ja) * 2016-01-20 2017-07-27 新明和工業株式会社 作業車両
JP2020157924A (ja) * 2019-03-26 2020-10-01 ヤンマーパワーテクノロジー株式会社 作業車両
JP2020168886A (ja) * 2019-04-01 2020-10-15 スズキ株式会社 燃料電池車両
CN210149159U (zh) * 2019-06-04 2020-03-17 武汉海亿新能源科技有限公司 一种基于燃料电池的农用拖拉机
JP2021075077A (ja) * 2019-11-05 2021-05-20 トヨタ自動車株式会社 貨物車両
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JP2023013187A (ja) * 2021-07-15 2023-01-26 株式会社クボタ 燃料電池システム及びそれを備えた作業機、並びに燃料電池システムの制御方法
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JP2023107634A (ja) 2022-01-24 2023-08-03 富士フイルム株式会社 情報処理装置、情報処理システム、情報処理方法及びプログラム
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US20260084520A1 (en) 2026-03-26

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