WO2025004897A1 - 作業車 - Google Patents
作業車 Download PDFInfo
- Publication number
- WO2025004897A1 WO2025004897A1 PCT/JP2024/021954 JP2024021954W WO2025004897A1 WO 2025004897 A1 WO2025004897 A1 WO 2025004897A1 JP 2024021954 W JP2024021954 W JP 2024021954W WO 2025004897 A1 WO2025004897 A1 WO 2025004897A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- hydraulic
- electric motor
- vehicle body
- work vehicle
- 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
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Classifications
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
-
- 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
- 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
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D51/00—Motor vehicles characterised by the driver not being seated
- B62D51/04—Motor vehicles characterised by the driver not being seated the driver walking
-
- 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
- B60L2200/44—Industrial trucks or floor conveyors
Definitions
- the present invention relates to a work vehicle.
- Patent Document 1 there is a work vehicle equipped with running gear (running wheels) located on both the left and right sides of the machine body (body frame) and hydraulic equipment (hydraulic pumps that supply hydraulic pressure).
- running gear running wheels
- hydraulic equipment hydraulic pumps that supply hydraulic pressure
- the present invention provides a work vehicle that allows work to be carried out without emitting exhaust gases, or with minimal emissions if exhaust gases are emitted, and that is also easy to use.
- the work vehicle according to the present invention comprises: The vehicle is equipped with running gear located on both the left and right sides of the body, hydraulic equipment, and a battery, and the battery is held in the lower part of the body below the hydraulic equipment and between the running gear on both the left and right sides.
- a power source driven by electric power obtained from a battery can be used, so an engine is not required and work can be performed in a state where no exhaust gas is emitted. Even if an engine is provided in addition to a power source driven by electric power, a smaller engine can be used than if only an engine is provided, so even if exhaust gas is emitted, work can be performed in a state where the amount of exhaust gas is small. Since the battery is mounted below the hydraulic equipment and between the left and right traveling gear on the underside of the body, the center of gravity of the entire work vehicle is low and is located between the left and right ground contact points in a plan view, allowing the work vehicle to travel stably and easily even on uneven ground, making it easy to work on.
- the hydraulic device includes a hydraulic pump and an electric motor that drives the hydraulic pump, and that the hydraulic pump and the electric motor are located directly above the battery.
- the hydraulic pump and electric motor do not extend beyond the area where the battery is located in a plan view, so the hydraulic pump, electric motor, and battery can be positioned together in a plan view.
- the electric motor is held on the aircraft by connecting a mounting plate portion provided on the electric motor to a stay provided on the aircraft, and the hydraulic pump is held on the aircraft by being attached to the mounting plate portion.
- the electric motor is held in the aircraft by connecting the mounting plate, which is easier to connect to the stay than the body of the electric motor, to the stay, making it easy to assemble the electric motor to the aircraft. Because the mounting plate is used as a stay for mounting the hydraulic pump, there is no need to provide a special stay for the hydraulic pump, making it inexpensive.
- an inverter connected to the electric motor is provided, and that the inverter is provided above the battery.
- a protection circuit unit be provided for the inverter, and that the protection circuit unit be provided above the battery.
- the aircraft be provided with a charger capable of charging the battery with power supplied from outside the aircraft.
- a guide rail be provided on the aircraft extending in the fore-and-aft direction of the aircraft between the battery storage space in the aircraft and the battery loading/unloading port portion of the aircraft, and capable of guiding the movement of the battery between the battery storage space and the battery loading/unloading port portion.
- the guide rails move and guide the battery from the battery storage space to the battery loading/unloading opening, allowing the battery to be easily pulled out to the battery loading/unloading opening.
- the guide rails move and guide the battery from the battery loading/unloading opening to the battery storage space, allowing the battery to be easily inserted into the battery storage space, making it easy to load and unload the battery.
- an oil cooler is provided on the aircraft rear side of the battery accommodating space, and the battery loading/unloading opening is provided on the aircraft front side of the battery accommodating space.
- the oil cooler does not become an obstacle when loading and unloading the battery, eliminating the need to take the time to remove it.
- each of the running devices on both the left and right sides is provided with front wheels and rear wheels, and that the front wheels and the rear wheels are each held on the body in a state in which they can be raised and lowered separately relative to the body.
- the front and rear wheels on both the left and right sides are raised and lowered, and the height positions of the front and rear wheels on both the left and right sides relative to the machine body are adjusted to a height position that corresponds to the inclination of the work location.
- This allows the machine to be adjusted to a horizontal or nearly horizontal position regardless of the inclination of the work location. In other words, even on rough ground, the machine can be maintained in a horizontal or nearly horizontal position by raising and lowering the front and rear wheels on both the left and right sides.
- FIG. 2 is a side view of the work vehicle as seen from the left side.
- FIG. FIG. 2 is a side view showing a first battery, a hydraulic pump, an electric motor, etc.
- FIG. 2 is a plan view showing a first battery, a hydraulic pump, an electric motor, and the like.
- FIG. 2 is a front view showing the first battery, the hydraulic pump, and the like.
- FIG. 4 is a diagram showing a drive structure of a traveling device.
- Figures 1 and 2 show a work vehicle for transporting containers, etc.
- the direction of arrow F shown in Figures 1 and 2 is the "front side of the body”
- the direction of arrow B shown in Figures 1 and 2 is the “rear side of the body”
- the direction of arrow U shown in Figure 1 is the “upper side of the body”
- the direction of arrow D shown in Figure 1 is the “lower side of the body”
- the direction of arrow L shown in Figure 2 is the “left side of the body”
- the direction of arrow R shown in Figure 2 is the "right side of the body.”
- the work vehicle includes a machine body 3 having a machine body frame 1 formed by connecting a plurality of steel materials such as steel pipes, a cover 2 surrounding the upper part of the machine body frame 1, and the like.
- the machine body 3 is supported by traveling devices 4 located on both the left and right sides of the machine body 3, and travels by the traveling devices 4 on both the left and right sides.
- a control unit 5 extends rearward from the upper part of the machine body 3.
- the control unit 5 is provided with a control lever 6 for operating the traveling operation of the machine body 3, and the like.
- a loading platform 7 on which a container or the like can be placed is provided on the upper part of the machine body 3.
- the loading platform 7 is located above the cover 2.
- a hydraulic pump 8 and an electric motor 9 for driving the traveling device 4 are provided below the loading platform 7.
- a first battery 10A, a second battery 10B, and the like are provided on the lower part of the machine body 3.
- the first battery 10A is a power source for driving the traveling device 4.
- the second battery 10B is a power source for control, and outputs power with a voltage lower than the voltage of the power output by the first battery 10A.
- a hydraulic motor 22 is provided on each of the left and right traveling devices 4, and the left traveling device 4 is configured to be driven by the left hydraulic motor 22, and the right traveling device 4 is configured to be driven by the right hydraulic motor 22.
- the left and right traveling devices 4 are each provided with a front wheel 23 and a rear wheel 24.
- the hydraulic motor 22 of the left traveling device 4 is provided with a hydraulic motor 22a for the left front wheel and a hydraulic motor 22b for the left rear wheel.
- the left front wheel 23 is driven by the hydraulic motor 22a for the left front wheel
- the left rear wheel 24 is driven by the hydraulic motor 22b for the left rear wheel.
- the hydraulic motor 22 of the right traveling device 4 is provided with a hydraulic motor 22a for the right front wheel and a hydraulic motor 22b for the right rear wheel.
- the right front wheel 23 is driven by the hydraulic motor 22a for the right front wheel
- the right rear wheel 24 is driven by the hydraulic motor 22b for the right rear wheel.
- the output shaft of the hydraulic motor 22a for the front wheels is connected to the axle of the front wheels 23, and the output shaft of the hydraulic motor 22b for the rear wheels is connected to the axle of the rear wheels 24. This makes it possible to drive the front wheels 23 by the hydraulic motor 22a for the front wheels, and to drive the rear wheels 24 by the hydraulic motor 22b for the rear wheels.
- the left motor control valve unit 26 is connected to the left front operating oil passage 25a provided in the hydraulic motor 22a for the left front wheel and the left rear operating oil passage 25b provided in the hydraulic motor 22b for the left rear wheel.
- the right motor control valve unit 28 is connected to the right front operating oil passage 27a provided in the hydraulic motor 22a for the right front wheel and the right rear operating oil passage 27b provided in the hydraulic motor 22b for the right rear wheel.
- the hydraulic pump 8 is connected to the left motor control valve unit 26 and the right motor control valve unit 28 via an oil supply passage 29.
- the hydraulic pump 8 and the hydraulic oil tank 31 are connected via a suction oil passage 32.
- An oil cooler 33 is provided in the suction oil passage 32.
- the electric motor 9 is operatively connected to the hydraulic pump 8, and the first battery 10A is connected to the electric motor 9 via an inverter 34.
- the inverter 34 is provided with a protection circuit unit 35.
- the protection circuit unit 35 prevents the capacitor in the inverter 34 from being damaged by a large current flowing in.
- the protection circuit unit 35 is equipped with a fuse.
- the DC power stored in the first battery 10A is supplied to the inverter 34 and converted into AC power, and the AC power is supplied from the inverter 34 to the electric motor 9 to drive the electric motor 9.
- the hydraulic pump 8 is driven by the electric motor 9, and hydraulic oil stored in the hydraulic oil tank 31 is taken out to the hydraulic pump 8 via the suction oil passage 32.
- the hydraulic pump 8 takes out the hydraulic oil from the hydraulic oil tank 31 via the oil cooler 33, and the hydraulic oil cooled by the oil cooler 33 is taken out to the hydraulic pump 8.
- the taken out hydraulic oil is supplied from the hydraulic pump 8 to the left motor control valve unit 26 and the right motor control valve unit 28 via the oil supply passage 29.
- Hydraulic oil is supplied from the left motor control valve unit 26 to the hydraulic motor 22a for the left front wheel to drive the hydraulic motor 22a for the left front wheel, and the left front wheel 23 is driven by the hydraulic motor 22a for the left front wheel.
- Hydraulic oil is supplied from the left motor control valve unit 26 to the hydraulic motor 22b for the left rear wheel, driving the hydraulic motor 22b for the left rear wheel, and the left rear wheel 24 is driven by the hydraulic motor 22b for the left rear wheel.
- Hydraulic oil is supplied from the right motor control valve unit 28 to the hydraulic motor 22a for the right front wheel, driving the hydraulic motor 22a for the right front wheel, and the right front wheel 23 is driven by the hydraulic motor 22a for the right front wheel.
- Hydraulic oil is supplied from the right motor control valve unit 28 to the hydraulic motor 22b for the right rear wheel, driving the hydraulic motor 22b for the right rear wheel, and the right rear wheel 24 is driven by the hydraulic motor 22b for the right rear wheel.
- each of the left and right running devices 4 is equipped with front wheels 23 and rear wheels 24, and the front wheels 23 are driven by a front wheel hydraulic motor 22a, and the rear wheels 24 are driven by a rear wheel hydraulic motor 22b.
- each of the left and right running devices 4 may be equipped with a crawler and a single hydraulic motor for driving the crawler.
- the aircraft frame 1 comprises a first frame 1A located at the top of the aircraft frame 1, and a second frame 1B extending downward from the first frame 1A.
- the first frame 1A has two first frame sections 11 arranged at a distance in the vertical direction, as shown in Figs. 3 and 5. As shown in Figs. 3, 4 and 5, each of the two first frame sections 11 is made of steel materials such as longitudinal angular steel pipes 11a extending in the fore-aft direction of the aircraft and horizontal angular steel pipes connecting the longitudinal angular steel pipes 11a.
- the two first frame sections 11 are connected at both lateral ends of the front end and both lateral ends of the rear end.
- the left and right longitudinal angular steel pipes 11a are connected by connecting members 11b at three points in the middle of the first frame section 11 in the fore-aft direction.
- the second frame 1B is provided with vertical frames 12 that extend downward from two points in the fore-aft direction of the lower of the two first frame sections 11 along the vertical direction of the aircraft.
- the two vertical frames 12 are formed in an upward U-shape and include left and right vertical frame sections 12a that extend downward from both sides of the lower first frame section 11, and horizontal frame sections 12b that connect the lower parts of the left and right vertical frame sections 12a.
- the middle parts in the vertical direction of the left and right vertical frame parts 12a are connected by a horizontal connecting frame 13.
- the connection of both ends of the horizontal connecting frame 13 to the vertical frame parts 12a is achieved by connecting the ends of the horizontal connecting frame 13 to the supports 12c provided on the vertical frame parts 12a with connecting bolts.
- the vertical middle portion of the left vertical frame portion 12a of the front vertical frame 12 of the two vertical frames 12 and the vertical middle portion of the left vertical frame portion 12a of the rear vertical frame 12 of the two vertical frames 12 are connected by the left front-to-rear connecting frame 14.
- the vertical middle portion of the right vertical frame portion 12a of the front vertical frame 12 of the two vertical frames 12 and the vertical middle portion of the right vertical frame portion 12a of the rear vertical frame 12 of the two vertical frames 12 are connected by the right front-to-rear connecting frame 14.
- the front ends of the left and right front-to-rear connecting frames 14 are connected to the vertical frame portion 12a of the front vertical frame 12 by connecting the front ends of the front-to-rear connecting frame 14 to the ends of the front lateral connecting frame 13.
- the rear ends of the left and right longitudinal connecting frames 14 are connected to the up-down frame portion 12a of the rear vertical frame 12 by connecting the rear ends of the longitudinal connecting frames 14 to the ends of the rear horizontal connecting frames 13.
- the two vertical frames 12 are made of round steel pipes bent into a U-shape, reducing the weight of the aircraft frame 1.
- a hydraulic pump 8, an electric motor 9, and a hydraulic oil tank 31 are provided below the loading platform 7.
- the hydraulic pump 8 and the hydraulic oil tank 31 are hydraulic equipment C.
- the first battery 10A is held in the lower part of the machine body 3, below the hydraulic equipment C and the electric motor 9, and between the left and right traveling devices 4.
- the first battery 10A which tends to be heavier than the hydraulic equipment C and the electric motor 9, is located between the left and right traveling devices 4, below the hydraulic equipment C and the electric motor 9, and is located at a position where the center of gravity of the entire work vehicle is low and between the left and right traveling devices 4 in a plan view.
- a first stay 37 protrudes upward from the front of the left and right longitudinal connecting frames 14 provided on the second frame 1B
- a second stay 38 protrudes upward from the left and right longitudinal connecting frames 14 rearward of the first stay 37.
- a mounting plate portion 9a provided on the front of the electric motor 9 is connected to the first stay 37 by a connecting bolt
- the rear of the electric motor 9 is connected to the second stay 38 by a connecting bolt.
- the electric motor 9 is attached to the left and right longitudinal connecting frames 14 via the first stay 37 and the second stay 38.
- a flange portion 8a is provided at the rear of the hydraulic pump 8, and the flange portion 8a is connected to the mounting plate portion 9a of the electric motor 9 by a connecting bolt.
- the hydraulic pump 8 is attached to the left and right longitudinal connecting frames 14 via the mounting plate portion 9a and the first stay 37.
- the hydraulic oil tank 31 is provided behind the electric motor 9.
- the hydraulic oil tank 31 is placed on the left and right longitudinal connecting frames 14 and secured to the left and right longitudinal connecting frames 14 by fastening bands 31a, and is held by the left and right longitudinal connecting frames 14.
- the hydraulic pump 8 and hydraulic oil tank 31, which are hydraulic equipment C, are held by the left and right longitudinal connecting frames 14 of the machine body 3.
- a battery storage space 40 is provided in the interior space of the machine body 3, below the hydraulic equipment C and the electric motor 9, and located between the left and right vertical frame portions 12a of the vertical frame 12.
- a pair of left and right guide rails 41 are provided at the bottom of the battery storage space 40.
- the pair of left and right guide rails 41 are attached across the front and rear horizontal frame portions 12b provided on the second frame 1B, and are held by the front and rear horizontal frame portions 12b in a state in which they extend in the fore-aft direction of the fuselage 3.
- the first battery 10A is placed on the pair of left and right guide rails 41 in the battery storage space 40, and is fixed to the pair of left and right guide rails 41 by switching a fixing mechanism (not shown) that fixes the first battery 10A to the guide rails 41 to an active state.
- the first battery 10A is held by the front and rear horizontal frame portions 12b via the pair of left and right guide rails 41 in the battery storage space 40.
- the first battery 10A is held by the front and rear lateral frame portions 12b of the machine body 3, below the hydraulic equipment C and the electric motor 9 and between the left and right running devices 4.
- the battery loading/unloading opening 42 is located in a portion of the body 3 that is located toward the front of the body away from the battery storage space 40.
- a pair of left and right guide rails 41 are provided between the battery storage space 40 and the battery loading/unloading opening 42.
- the fixing mechanism (not shown) that fixes the first battery 10A to the guide rails 41 is switched to the released state and the first battery 10A is slid toward the front of the aircraft body.
- the pair of left and right guide rails 41 guide the first battery 10A from the battery storage space 40 to the battery loading/unloading opening 42, and the first battery 10A can be easily pulled out into the battery loading/unloading opening 42.
- the rear of the first battery 10A When loading the first battery 10A onto the aircraft 3, the rear of the first battery 10A is placed on the front of the pair of left and right guide rails 41 at the battery loading/unloading opening 42 and the first battery 10A is slid towards the rear of the aircraft.
- the pair of left and right guide rails 41 guide the first battery 10A from the battery loading/unloading opening 42 to the battery storage space 40, and the first battery 10A can be easily inserted into the battery storage space 40.
- the hydraulic pump 8 and the electric motor 9 are installed directly above the first battery 10A.
- the hydraulic pump 8 and the electric motor 9 are located within the range in which the first battery 10A is located in a plan view.
- the hydraulic pump 8 and the electric motor 9 can be prevented from protruding outside the aircraft body from the range in which the first battery 10A is located in a plan view.
- the hydraulic pump 8 and the electric motor 9 are arranged in the fore-and-aft direction of the machine body, with the hydraulic pump 8 located further forward in the machine body than the electric motor 9, and with the input shaft (not shown) of the hydraulic pump 8 and the output shaft (not shown) of the electric motor 9 facing forward and backward.
- the input shaft of the hydraulic pump 8 and the output shaft of the electric motor 9 are connected with each other positioned on the same axis. This makes it easy to link and connect the hydraulic pump 8 and the electric motor 9.
- the oil cooler 33 is provided on the aircraft rear side relative to the battery housing space 40.
- the oil cooler 33 is connected to the rear vertical frame 12 by a connecting portion provided on the periphery of the oil cooler 33, and is held by the rear vertical frame 12.
- the oil cooler 33 does not become an obstacle, and there is no need to take the time to remove the oil cooler 33.
- the oil cooler 33 is provided further forward on the aircraft body than the second battery 10B.
- the second battery 10B is provided further rearward in the aircraft body than the battery storage space 40.
- the second battery 10B does not become an obstacle, and the effort of removing the second battery 10B is not required.
- the inverter 34 is provided above the first battery 10A.
- the inverter 34 is provided on the right lateral side of the electric motor 9.
- the inverter 34 is attached to a stay (not shown) that protrudes upward from the right longitudinal connecting frame 14, and is held by the right longitudinal connecting frame 14 via the stay.
- the protection circuit unit 35 is provided above the first battery 10A.
- the protection circuit unit 35 is housed in a box 43 provided above the electric motor 9.
- the box 43 is held by a support base 44.
- the support base 44 is connected to a mounting plate 9a provided on the electric motor 9 by a connecting bolt, and is held to the longitudinal connecting frame 14 via the mounting plate 9a.
- a charger 45 is connected to the first battery 10A.
- the charger 45 is equipped with a retractable charging cord (not shown).
- a power source such as a charging stand located outside the aircraft body 3
- power is supplied from the power source to the charger 45 via the charging cord, and the supplied power is charged into the first battery 10A by the charger 45.
- the first battery 10A can be charged by the charger 45 even if the first battery 10A is left loaded on the aircraft body 3.
- the charger 45 is held by the first frame 1A inside the front cover 2B, as shown in Figures 2, 3, and 4.
- the front cover 2B is held by the front cover frame 20 in a state in which it can swing up and down between a downward open position and an upward closed position, with the pivot axis X located at the bottom as the opening and closing axis.
- the charger 45 is opened forward, and the charger 45 can be used.
- the front wheels 23 and the rear wheels 24 are each held to the vehicle frame 1 via a connecting mechanism 46.
- FIG 7 is a side view of the coupling mechanism 46 of the right front wheel 23 seen from the left lateral side.
- the coupling mechanism 46 of the right front wheel 23 includes an upper link 47 held on the support part 19 provided on the first frame 1A so as to be swingable back and forth around the pivot axis P1 as a swing fulcrum, and a lower link 48 held on the free end of the upper link 47 so as to be swingable up and down around the pivot axis P2 as a swing fulcrum.
- the front wheel 23 is held on the free end of the lower link 48.
- a first hydraulic cylinder 49 is connected to the cylinder coupling part 19a provided on the support part 19 and the free end of the upper link 47.
- a second hydraulic cylinder 50 is connected to the base of the upper link 47 and the lower link 48.
- the upper link 47 is swung around the pivot axis P1 by the extension and contraction of the first hydraulic cylinder 49, raising and lowering the connecting mechanism 46 relative to the first frame 1A, and the lower link 48 is swung around the pivot axis P2 by the extension and contraction of the second hydraulic cylinder 50, bending and extending the connecting mechanism 46, and changing the mounting height of the front wheels 23 relative to the vehicle frame 1.
- the coupling mechanisms 46 of the left front wheel 23, the left rear wheel 24 and the right rear wheel 24 are configured similarly to the coupling mechanism 46 of the right front wheel 23.
- the machine body 3 can be adjusted to a horizontal or nearly horizontal position by adjusting the mounting height of the left and right front wheels 23 and the left and right rear wheels 24 relative to the machine body frame 1 in accordance with the inclination of the work location, regardless of the inclination of the work location in the left-right or fore-aft direction of the machine body.
- an auxiliary wheel 51 is held by the connecting mechanism 46 of each of the left front wheel 23, left rear wheel 24, right front wheel 23, and right rear wheel 24.
- the auxiliary wheel 51 is held in a rotatable state with the pivot axis P2 as the center of rotation.
- the auxiliary wheel 51 comes into contact with the ground together with the front wheel 23 and rear wheel 24 to support the vehicle body 3.
- an upper portion 52a of a holding member 52 that holds the front wheels 23 and the hydraulic motor 22a is held to a support portion 48a provided at the free end of the lower link 48 so as to be able to swing about the steering axis P3 as a swing fulcrum.
- a steering cylinder 53 is connected to a cylinder connecting portion 52b provided on the upper portion 52a and a cylinder connecting portion 48b provided on the lower link 48. The extension and contraction of the steering cylinder 53 causes the holding member 52 to swing relative to the lower link 48 with the steering axis P3 as a swing fulcrum, thereby steering the front wheels 23.
- the left front wheel 23, the left rear wheel 24 and the right rear wheel 24 are each configured to be steered by the same steering mechanism as the right front wheel 23.
- a left control valve device 55 having a left motor control valve unit 26 and a left CPU device 56 controlling the left control valve device 55 are configured to control the first hydraulic cylinder 49, the second hydraulic cylinder 50, and the steering cylinder 53 of the left front wheel 23 and the left rear wheel 24, respectively, and are held on the first frame 1A on the inner side of the aircraft than the left side cover 2A.
- a right control valve device 57 having a right motor control valve unit 28 and a right CPU device 58 controlling the right control valve device 57 are configured to control the first hydraulic cylinder 49, the second hydraulic cylinder 50, and the steering cylinder 53 of the right front wheel 23 and the right rear wheel 24, respectively, and are held on the first frame 1A on the inner side of the aircraft than the right side cover 2A.
- the cover 2 is provided below the loading platform 7. As shown in Figs. 1, 4 and 5, the cover 2 includes side covers 2A located on the outer left and right sides of the machine frame 1, and a front cover 2B located on the outer front side of the machine frame 1.
- the left and right side covers 2A and the front cover 2B are held by the first frame 1A of the aircraft frame 1.
- the side cover 2A is provided with a side cover frame 17 attached to the inside of the side cover 2A.
- Connecting arms 18 extend from two locations in the front-to-rear direction of the side cover frame 17 toward the first frame.
- the front connecting arm 18 is detachably connected to a support portion 19 provided at the front of the first frame 1A by a connecting bolt.
- the rear connecting arm 18 is detachably connected to a support portion 19 provided at the rear of the first frame 1A by a connecting bolt.
- the front cover 2B is provided with front cover frames 20 that are located on the left and right sides of the front cover 2B and hold the front cover 2B.
- the left and right front cover frames 20 are bent into a horizontal U-shape in side view so as to fit along the edges of the front cover 2B.
- the upper rear end of each of the left and right front cover frames 20 is connected to the front end of the upper first frame portion 11 of the first frame 1A, and the lower rear end of each of the left and right front cover frames 20 is connected to a support portion 19 provided in the front of the first frame 1A.
- the first battery 10A for driving the electric motor 9 is provided below the hydraulic equipment C and between the left and right traveling devices 4, but this is not limited to the above.
- a control battery may be provided in place of the first battery 10A, or in the case of a vehicle equipped with an engine, a battery for driving the engine may be provided.
- the traveling device 4 is provided with the front wheels 23 and the rear wheels 24, the front wheels 23 and the rear wheels 24 are each driven by the hydraulic motors 22a, 22b, and the front wheels 23 and the rear wheels 24 can be raised and lowered separately.
- the traveling device 4 may be provided with crawlers that can be driven by hydraulic motors.
- the front wheels 23 and rear wheels 24 may not be raised or lowered.
- the input shaft of the hydraulic pump 8 and the output shaft of the electric motor 9 may be oriented in any direction, such as oriented laterally of the vehicle body.
- the hydraulic pump 8 and the electric motor 9 may be arranged in any arrangement, such as oriented laterally of the vehicle body.
- the present invention can be applied to work vehicles equipped with running gear on both the left and right sides, hydraulic equipment, and work vehicles other than those used for transporting luggage.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
機体の左右両側に位置する走行装置と、油圧機器と、バッテリーと、が備えられ、前記バッテリーは、前記油圧機器よりも下側、かつ、左右両側の前記走行装置の間において前記機体の下部に保持されている。
バッテリーが油圧機器よりも下側、かつ、左右両側の走行装置の間において機体下部に保持されているので、作業車全体の重心が低く、かつ、平面視で左右の接地箇所の間に位置して不整地でも作業車が安定良く走行し易くて作業が行い易い。
前記油圧機器に油圧ポンプが備えられ、前記油圧ポンプを駆動する電動モータが備えられ、前記油圧ポンプおよび前記電動モータが前記バッテリーの直上方に位置していると好適である。
前記電動モータは、前記電動モータに備えられた取付けプレート部が前記機体に備えられたステーに連結されることによって前記機体に保持され、前記油圧ポンプは、前記取付けプレート部に取り付けられることによって前記機体に保持されていると好適である。
前記電動モータに接続されたインバータが備えられ、前記インバータは、前記バッテリーよりも上側に設けられていると好適である。
前記インバータのための保護回路部が備えられ、前記保護回路部は、前記バッテリーよりも上側に設けられていると好適である。
前記機体に設けられ、前記機体の外部から供給される電力を前記バッテリーに充電可能な充電器が備えられていると好適である。
前記機体におけるバッテリー収容空間と前記機体におけるバッテリー載せ降ろし口部とに亘って機体前後方向に延びる状態で前記機体に設けられ、前記バッテリー収容空間と前記バッテリー載せ降ろし口部との間で前記バッテリーを移動案内可能なガイドレールが備えられていると好適である。
前記バッテリー収容空間よりも機体後方側にオイルクーラが設けられ、前記バッテリー載せ降ろし口部は、前記バッテリー収容空間よりも機体前方側に設けられていると好適である。
前記左右両側の走行装置のそれぞれに、前車輪および後車輪が備えられ、前記前車輪および前記後車輪は、各別に前記機体に対して昇降操作可能な状態で前記機体に保持されていると好適である。
図1,2に、コンテナなどを移送する作業車が示されている。以下の説明では、作業車の機体に関し、図1,2に示される矢印Fの方向を「機体前側」、図1,2に示される矢印Bの方向を「機体後側」、図1に示される矢印Uの方向を「機体上側」、図1に示される矢印Dの方向を「機体下側」、図2に示される矢印Lの方向を「機体左側」、図2に示される矢印Rの方向を「機体右側」とする。
図1,2に示されるように、作業車は、鋼管などの複数の鋼材を連結して構成された機体フレーム1、機体フレーム1の上部を囲うカバー2などを有する機体3を備えている。機体3は、機体3の左右両側に位置する走行装置4によって支持され、かつ、左右両側の走行装置4によって走行する。機体3の上部から操縦部5が後向きに延ばされている。操縦部5に、機体3の走行操作などを行う操縦レバー6が備えられている。機体3の上部に、コンテナなどの載置可能な荷台7が設けられている。荷台7は、カバー2よりも上側に位置している。荷台7の下方に、走行装置4を駆動するための油圧ポンプ8および電動モータ9などが設けられている。機体3の下部に、第1バッテリー10A、第2バッテリー10Bなどが設けられている。第1バッテリー10Aは、走行装置4を駆動する電源である。第2バッテリー10Bは、制御用の電源であり、第1バッテリー10Aが出力する電力の電圧よりも低い電圧の電力を出力する。
図6に示されるように、左右両側の走行装置4それぞれに油圧モータ22が設けられ、左側の走行装置4は、左の油圧モータ22によって駆動され、右側の走行装置4は、右の油圧モータ22によって駆動されるように構成されている。
図3に示されるように、荷台7の下方に、油圧ポンプ8、電動モータ9および作動油タンク31が設けられている。油圧ポンプ8および作動油タンク31は、油圧機器Cである。図1,3,4,5に示されるように、第1バッテリー10Aは、油圧機器Cおよび電動モータ9よりも下側、かつ、左右両側の走行装置4の間において機体3の下部に保持されている。油圧機器Cおよび電動モータ9よりも重くなりがちな第1バッテリー10Aが油圧機器Cおよび電動モータ9よりも下側において左右両側の走行装置4の間に位置し、作業車全体の重心が低い位置、かつ、平面視で左右両側の走行装置4の間に位置する部位に位置する。
図3,4,5に示されるように、油圧ポンプ8および電動モータ9は、第1バッテリー10Aの直上方に設置されている。油圧ポンプ8および電動モータ9は、平面視において第1バッテリー10Aが位置する範囲内に位置している。油圧ポンプ8および電動モータ9が平面視において第1バッテリー10Aが位置する範囲から機体外側にはみ出ないようにできる。
図3,4,5に示されるように、オイルクーラ33は、バッテリー収容空間40よりも機体後方側に設けられている。オイルクーラ33は、オイルクーラ33の周部に備えられた連結部で後側の縦フレーム12に連結され、後側の縦フレーム12に保持されている。
第1バッテリー10Aの積み下ろしを行う際、オイルクーラ33が障害物にならなくてオイルクーラ33を取り外す手間を掛けなくて済む。オイルクーラ33は、第2バッテリー10Bよりも機体前方側に設けられている。
図3,4に示されるように、第2バッテリー10Bは、バッテリー収容空間40よりも機体後方側に設けられている。第1バッテリー10Aの積み下ろしを行う際、第2バッテリー10Bが障害物にならなくて第2バッテリー10Bを取り外す手間を掛けなくて済む。
図4,5に示されるように、インバータ34は、第1バッテリー10Aよりも上側に設けられている。インバータ34は、電動モータ9の右横側方に設けられている。インバータ34は、右の前後向き連結フレーム14から上向きに突設されたステー(図示せず)に取り付けられ、ステーを介して右の前後向き連結フレーム14に保持されている。
図3,4,5に示されるように、保護回路部35は、第1バッテリー10Aよりも上側に設けられている。保護回路部35は、電動モータ9の上方に設けられたボックス43に収容されている。ボックス43は、支持台44に保持されている。支持台44は、電動モータ9に備えられた取付けプレート部9aに連結ボルトによって連結され、取付けプレート部9aを介して前後向き連結フレーム14に保持されている。
図6に示されるように、第1バッテリー10Aに充電器45が接続されている。充電器45には、繰り出し可能な充電コード(図示せず)が備えられている。充電コートが機体3の外部に位置する充電スタンドなどの電源(図示せず)に接続されると、充電コードによって電源から充電器45に電力が供給され、供給された電力が充電器45によって第1バッテリー10Aに充電される。第1バッテリー10Aを機体3に積み込んだままにしても、充電器45によって第1バッテリー10Aに充電することができる。
図1,5に示されるように、左右両側の走行装置4それぞれにおいて、前車輪23および後車輪24は、各別に機体に対して昇降操作可能な状態で機体3に保持されている。
図7に示されるように、前車輪23および油圧モータ22aを保持する保持部材52の上部52aが、下部リンク48の遊端部に備えられた支持部48aに操向軸芯P3を揺動支点に揺動可能に保持されている。上部52aに備えられたシリンダ連結部52bと下部リンク48に備えられたシリンダ連結部48bとに操向シリンダ53が連結されている。
操向シリンダ53の伸縮によって保持部材52が操向軸芯P3を揺動支点にして下部リンク48に対して揺動操作されて前車輪23の操向操作が行われる。左の前車輪23、左の後車輪24および右の後車輪24それぞれは、右の前車輪23の操向操作機構と同じ操向操作機構によって操向操作されるように構成されている。
カバー2は、図1,4,5に示されるように、荷台7よりも下側に設けられている。カバー2は、図1,4,5に示されるように、機体フレーム1の左右横外側に位置する横カバー2A、機体フレーム1の前外側に位置する前カバー2Bが備えられている。
たとえば、第1バッテリー10Aに替えて制御用のバッテリーを設けたもの、あるいは、エンジンを備えるものにあっては、エンジンの駆動のためのバッテリーを設けたものであってもよい。
また、前車輪23および後車輪24を備えても、前車輪23および後車輪24の昇降操作が行われないものであってもよい。
4 走行装置
8 油圧ポンプ
9 電動モータ
9a 取付けプレート部
10A 第1バッテリー(バッテリー)
23 前車輪
24 後車輪
33 オイルクーラ
34 インバータ
35 保護回路部
37 第1ステー(ステー)
40 バッテリー収容空間
41 ガイドレール
42 バッテリー載せ降ろし口部
45 充電器
C 油圧機器
Claims (9)
- 機体の左右両側に位置する走行装置と、
油圧機器と、
バッテリーと、が備えられ、
前記バッテリーは、前記油圧機器よりも下側、かつ、左右両側の前記走行装置の間において前記機体の下部に保持されている作業車。 - 前記油圧機器に油圧ポンプが備えられ、
前記油圧ポンプを駆動する電動モータが備えられ、
前記油圧ポンプおよび前記電動モータが前記バッテリーの直上方に位置している請求項1に記載の作業車。 - 前記電動モータは、前記電動モータに備えられた取付けプレート部が前記機体に備えられたステーに連結されることによって前記機体に保持され、
前記油圧ポンプは、前記取付けプレート部に取り付けられることによって前記機体に保持されている請求項2に記載の作業車。 - 前記電動モータに接続されたインバータが備えられ、
前記インバータは、前記バッテリーよりも上側に設けられている請求項2または3に記載の作業車。 - 前記インバータのための保護回路部が備えられ、
前記保護回路部は、前記バッテリーよりも上側に設けられている請求項4に記載の作業車。 - 前記機体に設けられ、前記機体の外部から供給される電力を前記バッテリーに充電可能な充電器が備えられている請求項1から5のいずれか一項に記載の作業車。
- 前記機体におけるバッテリー収容空間と前記機体におけるバッテリー載せ降ろし口部とに亘って機体前後方向に延びる状態で前記機体に設けられ、前記バッテリー収容空間と前記バッテリー載せ降ろし口部との間で前記バッテリーを移動案内可能なガイドレールが備えられている請求項1から6のいずれか一項に記載の作業車。
- 前記バッテリー収容空間よりも機体後方側にオイルクーラが設けられ、
前記バッテリー載せ降ろし口部は、前記バッテリー収容空間よりも機体前方側に設けられている請求項7に記載の作業車。 - 左右両側の前記走行装置のそれぞれに、前車輪および後車輪が備えられ、
前記前車輪および前記後車輪は、各別に前記機体に対して昇降操作可能な状態で前記機体に保持されている請求項1から8のいずれか一項に記載の作業車。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0586770U (ja) * | 1992-04-30 | 1993-11-22 | 三菱農機株式会社 | 電動農用トラクタ |
| JP2004122377A (ja) * | 2002-09-30 | 2004-04-22 | Kyowa Kikai:Kk | 木材の基準面の形成方法と、その装置 |
| JP2008044408A (ja) * | 2006-08-10 | 2008-02-28 | Hitachi Constr Mach Co Ltd | バッテリ駆動式建設機械のバッテリ保持構造 |
| JP2018014928A (ja) * | 2016-07-27 | 2018-02-01 | ヤンマー株式会社 | コンバイン |
| JP2023000768A (ja) | 2021-06-18 | 2023-01-04 | 株式会社クボタ | 作業車 |
-
2023
- 2023-06-28 JP JP2023106172A patent/JP2025005796A/ja active Pending
-
2024
- 2024-06-18 EP EP24831759.6A patent/EP4737161A1/en active Pending
- 2024-06-18 WO PCT/JP2024/021954 patent/WO2025004897A1/ja not_active Ceased
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- 2025-12-03 US US19/407,828 patent/US20260084581A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0586770U (ja) * | 1992-04-30 | 1993-11-22 | 三菱農機株式会社 | 電動農用トラクタ |
| JP2004122377A (ja) * | 2002-09-30 | 2004-04-22 | Kyowa Kikai:Kk | 木材の基準面の形成方法と、その装置 |
| JP2008044408A (ja) * | 2006-08-10 | 2008-02-28 | Hitachi Constr Mach Co Ltd | バッテリ駆動式建設機械のバッテリ保持構造 |
| JP2018014928A (ja) * | 2016-07-27 | 2018-02-01 | ヤンマー株式会社 | コンバイン |
| JP2023000768A (ja) | 2021-06-18 | 2023-01-04 | 株式会社クボタ | 作業車 |
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| JP2025005796A (ja) | 2025-01-17 |
| US20260084581A1 (en) | 2026-03-26 |
| EP4737161A1 (en) | 2026-05-06 |
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