WO2025004527A1 - 作業車両 - Google Patents

作業車両 Download PDF

Info

Publication number
WO2025004527A1
WO2025004527A1 PCT/JP2024/016785 JP2024016785W WO2025004527A1 WO 2025004527 A1 WO2025004527 A1 WO 2025004527A1 JP 2024016785 W JP2024016785 W JP 2024016785W WO 2025004527 A1 WO2025004527 A1 WO 2025004527A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
flange
work vehicle
motor
extension member
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/JP2024/016785
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕喜 南出
哲平 大西
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 JP2025529472A priority Critical patent/JPWO2025004527A1/ja
Priority to EP24831400.7A priority patent/EP4737151A1/en
Publication of WO2025004527A1 publication Critical patent/WO2025004527A1/ja
Priority to US19/418,508 priority patent/US20260103062A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/71—Arrangement of fuel cells within vehicles specially adapted for electric vehicles
    • 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
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles

Definitions

  • This disclosure relates to work vehicles.
  • Patent Document 1 a work vehicle equipped with an electric motor and a battery is known (see Patent Document 1).
  • the work vehicle disclosed in Patent Document 1 has a battery located inside the bonnet.
  • the work vehicle disclosed in Patent Document 1 is a tractor.
  • a work vehicle is a work vehicle including an electric motor having an annular flange on a side surface on a first axial direction side, and a vehicle body having an annular plate to which the electric motor is fixed, and further including an extension member connecting the flange and the plate, the extension member having a cylindrical boss portion and a flange portion extending radially outward from an axial end portion of the boss portion, the plate being disposed on the first axial side of the flange, the boss portion being inserted from the first axial side into a through hole formed in the plate and fixed to the flange by a first bolt fastened to the flange from the first axial side, and the flange portion being disposed on the first axial side of the plate and fixed to the plate by a second bolt fastened to the plate from the first axial side.
  • the present disclosure is capable of suppressing distortion that occurs in an electric motor when fixing the electric motor to a chassis of a work vehicle equipped with an electric motor.
  • FIG. 1 is a perspective view showing an embodiment of a work vehicle according to the present disclosure.
  • FIG. 2 is a front view showing one embodiment of the work vehicle of the present disclosure.
  • FIG. 3 is a rear view showing one embodiment of the work vehicle of the present disclosure.
  • FIG. 4 is a right side view showing one embodiment of the work vehicle of the present disclosure.
  • FIG. 5 is a left side view showing one embodiment of the work vehicle of the present disclosure.
  • FIG. 6 is a plan view showing an embodiment of a work vehicle according to the present disclosure.
  • FIG. 7 is a bottom view showing one embodiment of the work vehicle of the present disclosure.
  • FIG. 8 is a perspective view showing a part of the work vehicle of the present disclosure in an exploded state.
  • FIG. 9 is a left side view of the work vehicle with a portion removed.
  • FIG. 10 is a perspective view showing a state in which the motor is mounted on the chassis.
  • FIG. 11 is an overall perspective view showing a state in which the motor is fixed to the plate.
  • FIG. 12 is an exploded perspective view showing a state in which the motor is fixed to the plate.
  • FIG. 13 is a cross-sectional view showing a state in which the motor is fixed to the plate.
  • FIG. 14 is a perspective view showing the extension member as viewed from the boss portion side.
  • the purpose of this disclosure is to suppress distortion that occurs in an electric motor fixed to a chassis of a work vehicle equipped with an electric motor.
  • a work vehicle is a work vehicle including an electric motor having an annular flange on a side surface on a first side in the axial direction, and a vehicle body having an annular plate to which the electric motor is fixed, and further includes an extension member connecting the flange and the plate.
  • the extension member has a cylindrical boss portion and a flange portion extending radially outward from an axial end portion of the boss portion.
  • the plate is disposed on a first axial side of the flange.
  • the boss portion is inserted into a through hole formed in the plate from the first axial side, and is fixed to the flange by a first bolt fastened to the flange from the first axial side.
  • the flange portion is disposed on the first axial side of the plate, and is fixed to the plate by a second bolt fastened to the plate from the first axial side.
  • the work vehicle of this embodiment can suppress distortion that occurs in an electric motor when the electric motor is fixed to the chassis of a work vehicle equipped with an electric motor.
  • the flange has an annular convex portion that protrudes radially inward toward a first axial side, and the boss portion is fixed to the convex portion inserted into the through hole from the second axial side.
  • the convex portion can be extended by the boss portion, and a spigot structure can be formed by the boss portion, the convex portion, and the through hole. This can improve the positioning accuracy of the motor relative to the plate. This can suppress distortion that occurs in the motor fixed to the plate.
  • the extension member preferably includes a first bolt hole through which the first bolt is inserted and a second bolt hole through which the second bolt is inserted, and the first bolt hole is preferably formed radially inward compared to the second bolt hole.
  • the outer diameter dimension of the flange portion of the extension member is larger than the outer diameter dimension of the flange.
  • the work vehicle according to this embodiment further includes a fuel cell module mounted on the vehicle body, and a hydrogen pipe and a hydrogen tank for supplying hydrogen to the fuel cell module.
  • a fuel cell module mounted on the vehicle body
  • a hydrogen pipe and a hydrogen tank for supplying hydrogen to the fuel cell module.
  • 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.
  • 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.
  • the vehicle body 11 has a chassis 41, a bonnet 34, a cover 111, and a fender 47 that covers the rear wheel 122 from above.
  • the chassis 41 supports the traveling device 12, the drive device 14, and the cabin 16.
  • 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 forms the front part of the chassis 41, and a gear case 33 that forms the rear part of the chassis 41.
  • the front frame 32 is formed by combining metal frame materials and the like.
  • 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 a power transmission mechanism 333 inside, such as a transmission, clutch, and differential gear.
  • the power transmission mechanism 333 slows or speeds up the rotation of the output shaft of the motor 31, and outputs it to the running device 12 (one or both of the front wheels 121 and rear wheels 122).
  • 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 front pillars 162 located in front of the driver's seat 15, rear pillars 163 located behind the driver's seat 15, and a roof 164 located above the driver's seat 15.
  • the front pillars 162 are provided on the left front and right front of the driver's seat 15.
  • the rear pillars 163 are provided on the left rear and right rear of the driver's seat 15.
  • the roof 164 is supported by the front pillars 162 and the rear pillars 163.
  • 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 to obtain the power to rotate the motor 31.
  • the fuel cell 24 (see Figure 9) has a battery casing 241 that is approximately rectangular and box-shaped, and a fuel cell stack 242 that is provided inside the battery casing 241.
  • the fuel cell stack 242 has multiple battery cells. Each battery cell has a positive electrode and a negative electrode. Multiple single cells are stacked. The power generated by each battery cell is collected and output to the battery unit 30.
  • the motor 31 has a rotating rotor and a stator with 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.
  • the tank unit 21 (see FIG. 9 ) 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 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, 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.
  • 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 accumulates power to be supplied to the motor 31.
  • the battery unit 30 (see FIG. 9 ) has a battery (battery pack) 300 and a housing 307 that houses the battery 300.
  • the battery 300 temporarily accumulates power generated by the fuel cell 24 and outputs the accumulated power to electrical devices such as the motor 31.
  • the battery 300 is composed of multiple battery cells.
  • the battery 300 is a charge-discharge type secondary battery such as a lithium ion battery or a lead storage battery.
  • the 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.
  • the work vehicle 10 has a first DC/DC converter 82 and a second DC/DC converter 83 as the step-down circuit.
  • FIG. 10 is a perspective view showing a state in which the motor is mounted on the chassis.
  • the front frame 32 which is a part of the chassis 41, is provided with a plate 410 for fixing the rear side of the motor 31 at its rear end.
  • the front frame 32 is provided with an intermediate plate 420 for fixing the front side of the motor 31 at its intermediate portion.
  • the motor 31 is disposed between the plate 410 and the intermediate plate 420.
  • the motor 31 is mounted on the front frame 32 with its front side fixed to the intermediate plate 420 and its front side fixed to the plate 410.
  • FIG. 11 is an overall perspective view showing the state in which the motor is fixed to the plate.
  • FIG. 12 is an exploded perspective view showing the state in which the motor is fixed to the plate.
  • FIG. 13 is a cross-sectional view showing the state in which the motor is fixed to the plate.
  • the motor 31 is fixed to the plate 410 via an extension member 320.
  • the center of the rotation shaft of the motor 31 is also referred to as the central axis C (see FIG. 13).
  • the rear side of the work vehicle 10 (the direction of the arrow X2) is also referred to as the first axial side
  • the front side of the work vehicle 10 (the direction of the arrow X1) is also referred to as the second axial side, based on the direction of the central axis C of the motor 31.
  • the direction perpendicular to the central axis C is also referred to as the radial direction.
  • the motor 31 includes a cylindrical case 310 and an annular flange 311 fixed to an end of the case 310 on a first side in the axial direction.
  • the flange 311 includes an attachment surface 312 that contacts the plate 410, and a convex portion 314 that protrudes from the radial inner side of the attachment surface 312 toward the first side in the axial direction.
  • the flange 311 further includes a shaft hole 315 formed on the radial inner side of the convex portion 314.
  • the shaft hole 315 is coaxial with the central axis C, and a shaft (not shown) that transmits the output of the motor 31 to the power transmission mechanism 333 is passed through the shaft hole 315.
  • the motor 31 includes a plurality of bolt holes 313 (six in this embodiment) for fixing the extension member 320 (specifically, the boss portion 321) in the convex portion 314.
  • the bolt hole 313 has a female thread into which the first bolt 431 is screwed.
  • the plate 410 includes an annular plate body 411.
  • the plate body 411 includes a through hole 412 formed on the radially inner side.
  • the plate 410 is disposed on a first axial side of the flange 311.
  • the through hole 412 is formed coaxially with the central axis C, and a shaft (not shown) that transmits the output of the motor 31 to the power transmission mechanism 333 is passed through the through hole 412.
  • the plate 410 is disposed adjacent to the first axial side of the motor 31 with the protrusion 314 inserted into the through hole 412 and the side surface 414 on the second axial side of the plate body 411 in contact with the mounting surface 312.
  • the plate 410 includes a plurality of bolt holes 413 (four in this embodiment) for fixing the extension member 320.
  • the bolt hole 413 has a female thread into which the second bolt 432 is screwed.
  • Fig. 14 is a perspective view showing the extension member as viewed from the boss side.
  • the extension member 320 includes a cylindrical boss portion 321 and a flange portion 322 extending radially outward from an end of the boss portion 321.
  • the boss portion 321 and the flange portion 322 are configured as separate bodies, but the boss portion 321 and the flange portion 322 may be configured as a single body.
  • the extension member 320 is used with the boss portion 321 facing the second axial side and the flange portion 322 facing the first axial side.
  • the extension member 320 has a through hole 323 formed on the radial inside of the boss portion 321 and the flange portion 322.
  • the extension member 320 is arranged so that the flange portion 322 contacts the first axial side of the plate 410 with the boss portion 321 inserted through the through hole 412 and the front end face of the boss portion 321 in contact with the convex portion 314.
  • the extension member 320 has a plurality of first bolt holes 324 (six in this embodiment) for fixing the boss portion 321 to the flange 311.
  • the first bolt hole 324 is a hole that axially penetrates the boss portion 321 and the flange portion 322, and a first bolt 431 is inserted through the first bolt hole 324.
  • the extension member 320 has multiple (four in this embodiment) second bolt holes 325 for fixing the flange 322 to the plate 410.
  • the second bolt holes 325 are holes that axially pass through the flange 322, and second bolts 432 are inserted through the second bolt holes 325.
  • the multiple first bolt holes 324 are formed radially inward compared to the multiple second bolt holes 325.
  • the boss portion 321 of the extension member 320 is fixed to the motor 31 (flange 311) at a position closer to the central axis C of the motor 31, thereby suppressing axial misalignment between the extension member 320 and the motor 31.
  • axial misalignment between the motor 31 and the extension member 320 can be suppressed, thereby suppressing distortion occurring in the motor 31 fixed to the plate 410.
  • the outer diameter of the boss portion 321 is approximately the same as the inner diameter of the through hole 412 and the outer diameter of the protrusion 314.
  • the outer diameter dimension A of the flange portion 322 is larger than the outer diameter dimension B of the flange 311 (see FIG. 13).
  • the extension member 320 is fixed to the plate 410 (plate body 411) at a position away from the central axis C of the motor 31, so that the contact area between the flange portion 322 and the plate 410 can be made large, thereby suppressing axial misalignment between the extension member 320 and the plate 410. With this configuration, the work vehicle 10 of the present disclosure can suppress axial misalignment of the plate 410 and the extension member 320, thereby suppressing distortion occurring in the motor 31 fixed to the plate 410.
  • the extension member 320 further includes an annular protrusion 326 at the end of the boss portion 321 on the second axial side.
  • the protrusion 326 is inserted into the shaft hole 315 of the flange 311. By inserting the protrusion 326 into the shaft hole 315, the extension member 320 is positioned with greater precision relative to the motor 31 in the radial direction.
  • the boss portion 321 of the extension member 320 is fixed to the convex portion 314 of the flange 311 by screwing a first bolt 431 inserted into the first bolt hole 324 from the first axial side into the bolt hole 313.
  • the flange portion 322 of the extension member 320 is fixed to the plate 410 (plate body 411) by screwing a second bolt 432 inserted into the second bolt hole 325 from the first axial side into the bolt hole 413.
  • the boss portion 321 is fixed to the flange 311 (convex portion 314) by the first bolt 431 inserted into the through hole 412 formed in the plate 410 from the first axial side and fastened to the flange 311 from the first axial side.
  • the flange portion 322 is disposed on a first axial side of the plate 410 and is fixed to the plate 410 by a second bolt 432 that is fastened to the plate 410 from the first axial side.
  • the flange 311 has an annular convex portion 314 that protrudes radially inward toward the first axial side, and the boss portion 321 is fixed to the convex portion 314 inserted into the through hole 412 from the second axial side.
  • the extension member 320 is fixed to the end face of the convex portion 314 on the first axial side and to the side surface 415 of the plate 410 on the first axial side.
  • the plate 410 is part of the chassis 41 and is a relatively large part, so it is difficult to perform highly accurate processing on the sides 414, 415 of the plate 410 to remove welding distortions, etc. If the flange 311 is fixed directly to such a side 414, distortions will occur in the flange 311 due to the influence of the distortions of the side 414.
  • the extension member 320 is a smaller part than the plate 410, so it is easy to perform highly accurate processing to remove distortions, etc., and the flatness of the end face can be easily ensured.
  • the flange 311 and the plate 410 are connected via the extension member 320, it is possible to prevent the influence of distortions of the plate 410 from reaching the flange 311, and this makes it possible to suppress distortions that occur in the flange 311 when the motor 31 is fixed to the plate 410.
  • the flange 311 and the plate 410 form a spigot structure by inserting the protruding portion 314 into the through hole 412.
  • the "spigot structure” here is a structure in which a recess formed in one part and a protruding portion formed in the other part are fitted together, thereby enabling the parts to be firmly combined while being positioned.
  • the work vehicle 10 of the present disclosure can obtain the same effect as extending the protruding portion 314 to the first side in the axial direction by connecting the boss portion 321 to the protruding portion 314.
  • the work vehicle 10 of the present disclosure can form a spigot structure with the motor 31, the extension member 320, and the plate 410 by using the extension member 320, thereby reliably suppressing axial misalignment of the motor 31 and the plate 410 and further improving the positioning accuracy of the motor 31 and the plate 410.
  • the work vehicle 10 of the present disclosure can extend the "spigot structure" formed by the through hole 412 and the protruding portion 314 in the axial direction by the extension member 320. For example, when the motor and the plate are directly fixed, it is necessary to position relatively large parts relative to each other, and the work of attaching the motor to the plate requires a lot of effort.
  • the work vehicle 10 of the present disclosure can connect the motor 31 and the plate 410 by adjusting the position of the extension member 320, which is relatively small (without the need to adjust the positions of the motor 31 and the plate 410). Therefore, the work vehicle 10 of the present disclosure can easily attach the motor 31 to the plate 410 by using the extension member 320 to axially extend the "spigot structure" formed by the through hole 412 and the protrusion 314.
  • the motor 31 shown in this embodiment employs a water-cooled cooling system in which a flow path (jacket) is formed inside the thickness of the case 310.
  • a flow path (jacket)
  • the work vehicle 10 disclosed herein fixes the motor 31 to the plate 410 via the extension member 320, thereby suppressing distortion occurring in the flange 311 and thereby suppressing leakage of fluid passing through the jacket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
PCT/JP2024/016785 2023-06-30 2024-05-01 作業車両 Ceased WO2025004527A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2025529472A JPWO2025004527A1 (https=) 2023-06-30 2024-05-01
EP24831400.7A EP4737151A1 (en) 2023-06-30 2024-05-01 Work vehicle
US19/418,508 US20260103062A1 (en) 2023-06-30 2025-12-12 Work vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-107676 2023-06-30
JP2023107676 2023-06-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/418,508 Continuation US20260103062A1 (en) 2023-06-30 2025-12-12 Work vehicle

Publications (1)

Publication Number Publication Date
WO2025004527A1 true WO2025004527A1 (ja) 2025-01-02

Family

ID=93938291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/016785 Ceased WO2025004527A1 (ja) 2023-06-30 2024-05-01 作業車両

Country Status (4)

Country Link
US (1) US20260103062A1 (https=)
EP (1) EP4737151A1 (https=)
JP (1) JPWO2025004527A1 (https=)
WO (1) WO2025004527A1 (https=)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09118143A (ja) * 1995-10-24 1997-05-06 Honda Motor Co Ltd 電動台車
US20140087906A1 (en) * 2012-09-21 2014-03-27 ArvinMeritor Technology Technology, LLC Axle assembly having an electric motor module
JP2017024710A (ja) * 2016-07-19 2017-02-02 井関農機株式会社 トラクタ
JP2020104681A (ja) * 2018-12-27 2020-07-09 株式会社クボタ 電動作業車
JP2022060655A (ja) 2020-10-05 2022-04-15 ヤマハ株式会社 回路基板および検出システム
JP2023026578A (ja) * 2019-12-26 2023-02-24 株式会社クボタ 電動作業車

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09118143A (ja) * 1995-10-24 1997-05-06 Honda Motor Co Ltd 電動台車
US20140087906A1 (en) * 2012-09-21 2014-03-27 ArvinMeritor Technology Technology, LLC Axle assembly having an electric motor module
JP2017024710A (ja) * 2016-07-19 2017-02-02 井関農機株式会社 トラクタ
JP2020104681A (ja) * 2018-12-27 2020-07-09 株式会社クボタ 電動作業車
JP2023026578A (ja) * 2019-12-26 2023-02-24 株式会社クボタ 電動作業車
JP2022060655A (ja) 2020-10-05 2022-04-15 ヤマハ株式会社 回路基板および検出システム

Also Published As

Publication number Publication date
JPWO2025004527A1 (https=) 2025-01-02
EP4737151A1 (en) 2026-05-06
US20260103062A1 (en) 2026-04-16

Similar Documents

Publication Publication Date Title
JP7769113B2 (ja) 作業車両
JP7763345B2 (ja) 作業車両
WO2025004527A1 (ja) 作業車両
JP2006168604A (ja) 車両用燃料電池システムおよび燃料電池搭載車両
JP2025006700A (ja) 作業車両
WO2025142007A1 (ja) 作業車両
JP7755745B2 (ja) 作業車両
WO2025004530A1 (ja) 作業車両
JP5155801B2 (ja) ハイブリッド車両
WO2024143321A1 (ja) 作業車両
JP2025102031A (ja) 作業車両
US20260084519A1 (en) Work vehicle
US20260084517A1 (en) Work vehicle
US20260084547A1 (en) Work vehicle
JP2025006682A (ja) 作業車両
WO2025004676A1 (ja) 作業車両
JP7810192B2 (ja) 電動車
WO2025004529A1 (ja) 作業車両
JP2025009259A (ja) 作業車両
WO2025142002A1 (ja) 作業機械、及び作業車両
US20260070410A1 (en) Work vehicle
JP2025102002A (ja) 作業機械
JP2024095113A (ja) 作業車両
WO2025004577A1 (ja) 作業車両
JP2026050069A (ja) 電動作業車両

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24831400

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025529472

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025529472

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2024831400

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2024831400

Country of ref document: EP

Effective date: 20260130

ENP Entry into the national phase

Ref document number: 2024831400

Country of ref document: EP

Effective date: 20260130