# US 12,766,950 B2 · Drive system

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- Number: US 12,766,950 B2
- Document ID: US12766950B2
- Status: Granted
- Kind: B2
- Application number: 18/844,236
- Filed: 2023-02-07
- Published: 2026-01-08
- Granted: 2026-10-20
- Earliest claimed: 2022-03-08
- Assignees: Ijtt Co., Ltd.
- Applicants: IJTT Co., Ltd.
- Inventors: Yoshihisa Hamanaka; Sou Kato; Tomohiro Ishikawa; Hirokazu Takizawa
- Web page: https://patentgrep.com/patent/US12766950B2

## CPC

- B60K 17/22: characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
- F16D 3/22: the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- B60Y 2200/91: Electric vehicles
- 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
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

A drive system is provided that suppresses vibration and noise. A drive system 1 for an electric vehicle includes a gearbox 3 that outputs a driving force from a motor 2, a final reduction gear 4 for transmitting the input driving force to left and right wheels; and a propeller shaft 5 extending in a front-rear direction and connecting the gearbox and the final reduction gear. The propeller shaft includes an input end part 9 that is coaxially connected to an output shaft 8 of the gearbox, an output end part 10 that is coaxially connected to an input shaft of the final reduction gear; a constant velocity joint 7 that is disposed at an intersection angle θ greater than zero and equal to or less than a predetermined upper limit, and a slide part 11 that allows relative movement of the final reduction gear with respect to the gearbox in the front-rear direction.

## Claims

### Claim 1

A drive system for an electric vehicle, comprising:
a gearbox that outputs a driving force from a motor;
a final reduction gear for transmitting the input driving force to left and right wheels; and
a propeller shaft extending in a front-rear direction and connecting the gearbox and the final reduction gear,
wherein the propeller shaft comprises:
an input end part that is coaxially connected to an output shaft of the gearbox;
an output end part that is coaxially connected to an input shaft of the final reduction gear;
a constant velocity joint that is disposed at an intersection angle greater than zero and equal to or less than a predetermined upper limit; and
a slide part that allows relative movement of the final reduction gear with respect to the gearbox in the front-rear direction,
wherein the input end part is connected to the output shaft of the gearbox by a spline so as to be axially slidable, and the input end part forms the slide part.

### Claim 2 (depends on 1)

The drive system according to claim 1, wherein the upper limit is 10°.

### Claim 3 (depends on 1)

The drive system according to claim 1, wherein a distance between the gearbox and the final reduction gear in the front-rear direction is 500 mm or less.

### Claim 4 (depends on 1)

The drive system according to claim 1, wherein the gearbox is disposed in a rearward inclined state.

### Claim 5 (depends on 1)

The drive system according to claim 1, wherein the constant velocity joint is a double Cardan joint or a Rzeppa joint.