# US 12,179,586 B2 · Electric work vehicle

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- Number: US 12,179,586 B2
- Document ID: US12179586B2
- Status: Granted
- Kind: B2
- Application number: 17/783,424
- Filed: 2020-10-14
- Published: 2023-01-12
- Granted: 2024-12-31
- Earliest claimed: 2019-12-26
- Assignees: Kubota Corporation
- Applicants: Kubota Corporation
- Inventors: Daisuke Miyazaki
- Web page: https://patentgrep.com/patent/US12179586B2

## CPC

- B60K 25/06: from the transmission power take-off
- B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00)
- B60K 1/04: of the electric storage means for propulsion
- B60K 25/00: Auxiliary drives (arrangement of tyre-inflating pumps mounted on vehicles B60C23/10)
- B60K 2025/005: {driven by electric motors forming part of the propulsion unit}
- B60Y 2200/22: Agricultural vehicles
- B60Y 2200/223: Ridable lawn mowers
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

An electric work vehicle includes a work implement, a battery, a motor driven by electric power supplied by the battery, a traveler driven by the motor, a hydraulic pump that is driven by the motor to supply oil to an operating mechanism of the work implement, a transmission to transmit motive power from the motor to the hydraulic pump, and a case that houses the transmission. The case is coupled to the motor, and the hydraulic pump his supported by the case.

## Claims

### Claim 1

An electric work vehicle comprising:
a work implement;
a battery;
a motor to be driven by electric power supplied by the battery;
a traveler to be driven by the motor;
a speed change device to change a driving force from the motor and transmit the driving force as changed to the traveler;
a hydraulic pump to be driven by the motor to supply oil to an operating mechanism of the work implement;
a transmission to transmit motive power from the motor to the hydraulic pump; and
a case to house the transmission; wherein
the motor includes a motor output shaft;
the speed change device includes a transmission input shaft rotatable integrally with the motor output shaft;
the motor and the hydraulic pump are located outside of the case;
the case is coupled to the motor;
the hydraulic pump is supported by the case; and
the transmission transmits the motive power from the motor output shaft through a transmission path divided into a transmission path extending to the speed change device and a transmission path extending to the hydraulic pump.

### Claim 2 (depends on 1)

The electric work vehicle according to claim 1, wherein
the case includes a first portion and a second portion that are adjacent to each other in a front-rear direction of a body of the electric work vehicle;
the first portion and the second portion are coupled to each other;
the first portion is located on one side in the front-rear direction of the body relative to the second portion;
the motor and the hydraulic pump are located on the one side in the front-rear direction of the body relative to the first portion; and
the second portion is separable from the first portion toward another side in the front-rear direction of the body.

### Claim 3 (depends on 2)

The electric work vehicle according to claim 2, further comprising:
left and right main frames that extend in the front-rear direction of the body; wherein
the left and right main frames each include an end portion on the other side in the front-rear direction of the body, the end portions being connected to an end portion of the first portion on the one side in the front-rear direction of the body;
the motor is located at a position between the left and right main frames; and
the first portion supports the motor in a cantilevered state and supports the hydraulic pump in a cantilevered state.

### Claim 4 (depends on 2)

The electric work vehicle according to claim 2, further comprising:
a plurality of fasteners; wherein
the fasteners each fasten together the motor, the first portion, and the second portion;
in a rear view, the fasteners are aligned in a circumferential direction of the motor output shaft, and are centered around the motor output shaft; and
the transmission extends through a space between two of the fasteners that are adjacent to each other in the circumferential direction of the motor output shaft.

### Claim 5 (depends on 1)

The electric work vehicle according to claim 1, wherein the transmission includes a gear.

### Claim 6 (depends on 1)

The electric work vehicle according to claim 1, wherein the case is configured to store oil.

### Claim 7

An electric work vehicle comprising:
a work implement;
a battery;
a motor to be driven by electric power supplied by the battery;
a traveler to be driven by the motor;
a hydraulic pump to be driven by the motor to supply oil to an operating mechanism of the work implement;
a transmission to transmit motive power from the motor to the hydraulic pump; and
a case to house the transmission; and
an oil supply passage that connects the case and the hydraulic pump; wherein
the motor and the hydraulic pump are located outside of the case;
the case is coupled to the motor;
the hydraulic pump is supported by the case;
the case is configured to store oil; and
the oil stored in the case is supplied to the hydraulic pump via the oil supply passage.

### Claim 8

An electric work vehicle comprising:
a work implement;
a battery;
a motor to be driven by electric power supplied by the battery;
a traveler to be driven by the motor;
a hydraulic pump to be driven by the motor to supply oil to an operating mechanism of the work implement;
a transmission to transmit motive power from the motor to the hydraulic pump; and
a case to house the transmission; wherein
the motor and the hydraulic pump are located outside of the case;
the case is coupled to the motor;
the hydraulic pump is supported by the case;
the case includes a first portion and a second portion that are adjacent to each other in a front-rear direction of a body of the electric work vehicle;
the first portion and the second portion are coupled to each other;
the first portion is located on one side in the front-rear direction of the body relative to the second portion;
the motor and the hydraulic pump are located on the one side in the front-rear direction of the body relative to the first portion; and
the second portion is separable from the first portion toward another side in the front-rear direction of the body.