IP Library › Granted Patent US 12,157,360
Granted Patent B2
US 12,157,360 · App. 17/619,529 · Granted Dec 3, 2024

Electric work vehicle

Inventors: Norita Tottori (Sakai, JP); Daisuke Nakayama (Sakai, JP); Hironobu Nogami (Sakai, JP)
Assignee: KUBOTA CORPRATION
B60K1/04B60K11/04B60L50/60B62D21/186B60K2001/003B60K2001/0411B60L2200/40B60L2210/40B62D49/06
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Quick Facts
Patent No.
US 12,157,360
App. No.
17/619,529
Granted
Dec 3, 2024
Kind
B2
Abstract

An electric work vehicle includes a battery, a motor positioned under the battery and drivable on electric power supplied by the battery, a travel device drivable by the motor, an inverter positioned under the battery and forward of the motor to convert direct-current electric power from the battery into alternating-current electric power and supply the alternating-current electric power to the motor, and a transmission positioned backward of the battery to transmit a driving force of the motor to the travel device, wherein the motor and the inverter are arranged in a front-back direction of a machine body.

Claims (27)

1. An electric work vehicle, comprising:

a battery;

a motor positioned under the battery and drivable on electric power supplied by the battery;

a travel device drivable by the motor;

an inverter positioned under the battery and forward of the motor to convert direct-current electric power from the battery into alternating-current electric power and supply the alternating-current electric power to the motor; and

a transmission positioned backward of a rear end of the battery to transmit a driving force of the motor to the travel device; wherein

the motor and the inverter are arranged in a front-back direction of a machine body.

2. The electric work vehicle according to claim 1 , further comprising:

a left main frame and a right main frame both extending in the front-back direction of the machine body; wherein

the inverter is supported by the left main frame and the right main frame; and

the motor is between the left main frame and the right main frame.

3. The electric work vehicle according to claim 2 , further comprising:

a radiator; and

a water pump positioned forward of the motor and below the inverter to force cooling water to pass through the radiator.

4. The electric work vehicle according to claim 1 , further comprising:

a left main frame and a right main frame both extending in the front-back direction of the machine body; wherein

the inverter is supported by the left main frame and the right main frame; and

the inverter extends farther leftward than a left end of the left main frame and farther rightward than a right end of the right main frame.

5. The electric work vehicle according to claim 4 , further comprising:

an inverter support between the inverter and the main frames; wherein

the inverter support extends farther leftward than the left end of the left main frame and farther rightward than the right end of the right main frame; and

the battery is supported by the inverter support with a left battery support frame and a right battery support frame in-between, the left battery support frame and the right battery support frame standing on the inverter support.

6. The electric work vehicle according to claim 1 , further comprising a partition plate between the battery and the inverter.

7. The electric work vehicle according to claim 1 , further comprising:

a radiator forward of the battery; and

a cooling fan positioned forward of the battery to cool the radiator; wherein

the cooling fan extends in the up-down direction of the machine body to face both the battery and the inverter and sends cooling air backward.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 15, 2022
From: TOTTORI, NORITA; NAKAYAMA, DAISUKE; NOGAMI, HIRONOBU
To: KUBOTA CORPORATION
Reel/Frame 059009/0501 →
Priority Claims (1)
JP 2019-116724 · Jun 24, 2019 · national
Continuity (1)
Related Publication 20220379704A1 · Dec 1, 2022
Cited By (2)
US 12,594,844 US 12,741,537