Power system

Patent metadata

Field	Value
Publication number	US-10787194-B2
Application number	US-201916289884-A
Country	US
Kind code	B2
Filing date	Mar 1, 2019
Priority date	Mar 5, 2018
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A power system includes an electric motor for driving a left wheel and a right wheel of a vehicle, an electric motor control device for controlling the electric motor, a transmission disposed on a power transmission path between the electric motor, the left and right wheels, a differential device for distributing output decelerated by the transmission to the left and right wheels, a case which accommodates the electric motor, the transmission, and the differential device, a left axle of which one end is connected to the differential device and the other end extends from the case to be connected to the left wheel, and a right axle of which one end is connected to the differential device and the other end extends from the case to be connected to the right wheel. A conductive rotation allowing member having conductivity is provided between the differential device and the case.

First claim

What is claimed is:

1. A power system comprising:
an electric motor for driving a left wheel and a right wheel of a vehicle;
an electric motor control device for controlling the electric motor;
a transmission disposed on a power transmission path between the electric motor, the left wheel and the right wheel;
a differential device for distributing output decelerated by the transmission to the left wheel and the right wheel;
a case which accommodates the electric motor, the transmission, and the differential device;
a left axle of which one end is connected to the differential device and the other end extends from the case to be connected to the left wheel; and
a right axle of which one end is connected to the differential device and the other end extends from the case to be connected to the right wheel, wherein
a storage portion which stores lubricating oil below the differential device is provided in the case,
a bearing is provided between at least one of the left axle and the right axle and the case as a conductive rotation allowing member having conductivity, and
the bearing is provided above the storage portion and includes an outer ring, an inner ring, a plurality of balls rolling between the outer ring and the inner ring, and a seal plate provided on one axial side of the outer ring.

2. The power system according to claim 1 , wherein
the transmission includes at least one gear configured to rotate and enable the lubricating oil within the storage portion to be scooped up with the rotation and supplied to the bearing.

3. A power system comprising:
an electric motor for driving a left wheel and a right wheel of a vehicle;
an electric motor control device for controlling the electric motor;
a transmission disposed on a power transmission path between the electric motor, the left wheel and the right wheel;
a differential device for distributing output decelerated by the transmission to the left wheel and the right wheel;
a case which accommodates the electric motor, the transmission, and the differential device;
a left axle of which one end is connected to the differential device and the other end extends from the case to be connected to the left wheel; and
a right axle of which one end is connected to the differential device and the other end extends from the case to be connected to the right wheel, wherein
a storage portion which stores lubricating oil below the differential device is provided in the case,
a bearing is provided between the differential device and the case as a conductive rotation allowing member having conductivity, and
the bearing is provided above the storage portion and includes an outer ring, an inner ring, a plurality of balls rolling between the outer ring and the inner ring, and a seal plate provided on one axial side of the outer ring.

4. The power system according to claim 3 , wherein
the transmission includes at least one gear configured to rotate and enable the lubricating oil within the storage portion to be scooped up with the rotation and supplied to the bearing.

Assignees

• Honda Motor Co Ltd

Inventors

• Endo Rintaro
• Ueda Taku
• Kashiwabara Keiichiro

Classifications

• B60Y2400/73

  Planetary gearings · CPC title

• B60L15/20

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• F16C33/62

  Selection of substances · CPC title

• B60K17/00

  Arrangement or mounting of transmissions in vehicles · CPC title

• Y02T10/64

  Electric machine technologies in electromobility · CPC title