IP Library › Granted Patent US 12,358,560
Granted Patent B2
US 12,358,560 · App. 18/532,125 · Granted Jul 15, 2025

Chassis of electric work vehicle including intermediate frame with isolation structure

Inventor: David Kieke (Fremont, CA)
Assignee: KUBOTA CORPORATION
B62D21/02B60K1/04B60L50/66B60R16/04B62D25/08B60K2001/0411B60K2001/0416
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Quick Facts
Patent No.
US 12,358,560
App. No.
18/532,125
Granted
Jul 15, 2025
Kind
B2
Abstract

An electric work vehicle includes a chassis, a battery housing supported by the chassis, a rear axle, and an isolation structure. The chassis includes an intermediate frame attached to a rear portion of the battery housing. The intermediate frame is located between the battery housing and the rear axle in a front-rear direction of the electric work vehicle. The intermediate frame includes a plurality of wall portions that define an interior space. At least one of the plurality of wall portions includes a wall surface that faces the interior space. The isolation structure is attached to the wall surface.

Claims (30)

1. An electric work vehicle comprising:

a chassis;

a battery housing supported by the chassis;

a rear axle; and

an isolation structure, wherein

the chassis includes an intermediate frame attached to a rear portion of the battery housing;

the intermediate frame is located between the battery housing and the rear axle in a front-rear direction of the electric work vehicle;

the intermediate frame includes a plurality of wall portions that define an interior space;

at least one of the plurality of wall portions includes a wall surface that faces the interior space; and

the isolation structure is attached to the wall surface.

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

an electric motor located rearward of the intermediate frame in the front-rear direction, wherein

the isolation structure and the electric motor overlap in the front-rear direction.

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

an electrical component located within the interior space, wherein

the isolation structure and the electrical component overlap in the front-rear direction.

4. The electric work vehicle according to claim 3 , wherein the electrical component includes a DC-DC converter.

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

an electric motor located rearward of the intermediate frame in the front-rear direction; and

a DC-DC converter located within the interior space.

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

at least one battery provided in the battery housing, wherein

the electric motor and the DC-DC converter are electrically connected to the at least one battery,

the electric motor is powered by the battery, and

the DC-DC converter converts a battery voltage of the at least one battery to lower voltage.

7. The electric work vehicle according to claim 1 , wherein the isolation structure includes an insulating material.

8. The electric work vehicle according to claim 1 , wherein the isolation structure is a flat plate.

9. The electric work vehicle according to claim 1 , wherein the isolation structure has a textured surface.

10. The electric work vehicle according to claim 1 , wherein the isolation structure extends between an upper edge and a lower edge of the intermediate frame.

11. The electric work vehicle according to claim 1 , wherein the intermediate frame is made of metal.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 7, 2023
From: KIEKE, DAVID
To: KUBOTA CORPORATION
Reel/Frame 065835/0559 →
Continuity (2)
Provisional Application 63546287 · Oct 30, 2023
Related Publication 20250136182A1 · May 1, 2025
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