# US 2014/0150587 A1 · Transfer

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- Number: US 2014/0150587 A1
- Document ID: US20140150587A1
- Status: Published application
- Kind: A1
- Application number: 14/095,002
- Filed: 2013-12-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Isao KOZAWA; Hideki TAMOTO
- Web page: https://patentgrep.com/patent/US20140150587A1

## CPC

- B60K 17/3465: {self-actuated means, e.g. differential locked automatically by difference of speed}
- B60K 6/365: with the gears having orbital motion
- B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive
- Y02T 10/62: Hybrid vehicles
- Y10T 74/19684: Motor and gearing
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A transfer includes an input gear, an intermediate gear, an output gear, and an electric motor. Driving torque is transmitted to the input gear. The intermediate gear engages with the input gear. The output gear engages with the intermediate gear. The electric motor is connected to the intermediate gear. A diameter of the intermediate gear is smaller than a diameter of the input gear and a diameter of the output gear.

## Claims

### Claim 1

A transfer comprising:
an input gear to which driving torque is transmitted;
an intermediate gear engaging with the input gear;
an output gear engaging with the intermediate gear; and
an electric motor connected to the intermediate gear, a diameter of the intermediate gear being smaller than a diameter of the input gear and a diameter of the output gear.

### Claim 2 (depends on 1)

The transfer according to claim 1,
wherein the number of teeth of the intermediate gear is less than the number of teeth of the input gear and the number of teeth of the output gear.

### Claim 3 (depends on 1)

The transfer according to claim 1, wherein
the electric motor is arranged outside of the intermediate gear in an axial direction of the electric motor,
the intermediate gear has an inner peripheral portion, and
an inner diameter of the inner peripheral portion is smaller than an outer diameter of the electric motor.

### Claim 4 (depends on 1)

The transfer according to claim 1, wherein
the intermediate gear has an inner peripheral portion,
a first fitting portion is provided in the inner peripheral portion, and
a second fitting portion fitting in the first fitting portion is provided in an outer peripheral portion of a shaft of the electric motor.

### Claim 5 (depends on 4)

The transfer according to claim 4, wherein
the first fitting portion is a first spline provided along an axial direction of the intermediate gear,
the second fitting portion is a second spline provided along an axial direction of the electric motor, and
the first spline is fitted on the second spline.

### Claim 6 (depends on 1)

The transfer according to claim 1,
wherein the transfer is installed in a vehicle of a front engine and rear wheel drive type.