Electric actuator

Patent metadata

Field	Value
Publication number	US-9190884-B2
Application number	US-201414186588-A
Country	US
Kind code	B2
Filing date	Feb 21, 2014
Priority date	Apr 19, 2013
Publication date	Nov 17, 2015
Grant date	Nov 17, 2015

Abstract

A worm gear unit is fitted to an output shaft of a motor rotation unit. A bearing supports the output shaft rotatably and makes contact with the worm gear unit, which is applied with thrust load and moved to an other side. A yoke has a bottom portion surrounding the motor rotation unit on one side and having a shaft hole through which the output shaft passes. An axial hollow is formed in the bottom portion by press working to be coaxial with the shaft hole and to open on the one side to accommodate the bearing. A projected piece is formed simultaneously with the axial hollow in the press working. The projected piece is projected inward in a radial direction toward the axial hollow and located between the motor rotation unit and the bearing in the axial direction.

First claim

What is claimed is:

1. An electric actuator comprising:
a motor rotation unit integrated with an output shaft of an electric motor to form a rotor of the electric motor;
a worm gear unit fitted to a first portion of the output shaft, the first portion being projected from the motor rotation unit to one side in an axial direction, the worm gear unit configured to receive thrust load from a worm wheel in the axial direction;
a bearing located between the motor rotation unit and…

Assignees

• Denso Corp

Inventors

• Hayashi Hideki

Classifications

• F16H2057/0213

  Mechanical Engineering · mapped topic

• Y10T74/18792

  Cross-Sectional Technologies · mapped topic

• F16C35/02

  Mechanical Engineering · mapped topic

• H02K7/1166 Primary

  Electricity · mapped topic

• F16C2380/27

  Mechanical Engineering · mapped topic