Electric work vehicle

Patent metadata

Field	Value
Publication number	US-12179586-B2
Application number	US-202017783424-A
Country	US
Kind code	B2
Filing date	Oct 14, 2020
Priority date	Dec 26, 2019
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

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.

First claim

The invention claimed is:

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.

2. 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.

3. 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.

4. 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.

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

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

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.

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.

Assignees

• Kubota Kk

Inventors

• Miyazaki Daisuke

Classifications

• B60Y2200/223

  Ridable lawn mowers · CPC title

• B60K1/00

  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) · CPC title

• B60K2025/005

  driven by electric motors forming part of the propulsion unit · CPC title

• B60K1/04 Primary

  of the electric storage means for propulsion · CPC title

• B60Y2200/22

  Agricultural vehicles · CPC title