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Electric Power Steering

A technology of electric power steering and steering shaft, which is applied in the direction of electric steering mechanism, power steering mechanism, transmission device, etc., and can solve the problems such as prone to creeping gears

Inactive Publication Date: 2018-11-27
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the meshing gap between the pair of pulleys and the teeth of the belt is enlarged, there is a possibility that a new problem of tooth creeping will easily occur during the meshing period of the pair of pulleys and the teeth of the belt.

Method used

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  • Electric Power Steering
  • Electric Power Steering
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Examples

Experimental program
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Embodiment Construction

[0027] A first embodiment of the present invention will be described.

[0028] Such as figure 1 As shown, the electric power steering device 1 includes a pinion shaft 2 that rotates when the driver performs a steering operation, and a steering shaft that changes the steering angle of the steered wheels by reciprocating and linearly moving in the axial direction corresponding to the rotation of the pinion shaft 2 . rack shaft 3. The electric power steering device 1 includes a substantially cylindrical rack housing 4 into which a rack shaft 3 is inserted.

[0029] The pinion shaft 2 is rotatably housed in the rack case 4 in a state oblique to the rack shaft 3 . A rack and pinion mechanism is formed by meshing the pinion teeth of the pinion shaft 2 with the rack teeth of the rack shaft 3 . The pinion shaft 2 is connected to the steering shaft, and a steering wheel operated by the driver is fixed to the front end of the pinion shaft 2 .

[0030] In the electric power steering ...

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PUM

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Abstract

An electric power steering device includes a motor, a drive pulley that is connected to the output shaft of the motor and includes helical teeth, a driven pulley that is arranged coaxially with a rack shaft and includes helical teeth, and a belt that is wound around these pulleys and includes helical teeth meshing with the respective helical teeth of both pulleys. Internal teeth 31 on a belt 30 each are formed to have a tooth thickness that is reduced toward both ends thereof along the width direction of the belt.

Description

[0001] This application claims the priority of Japanese Patent Application No. 2014-025501 filed on February 13, 2014 and Japanese Patent Application No. 2014-230971 filed on November 13, 2014, and uses the entire contents thereof here. technical field [0002] The invention relates to an electric power steering device. Background technique [0003] As an electric power steering apparatus that applies assist force to a steering mechanism, there is a device in which a motor is arranged in parallel to a steering shaft, and the output of the motor is applied as assist force via a transmission mechanism composed of a pair of pulleys and a belt. For example, Japanese Patent Application Laid-Open No. 2004-314770. [0004] It is generally known that in such an electric power steering device, when the pair of pulleys and the belt are in operation, an operation sound is generated during the meshing of the teeth of the pulleys and the belt, and reducing such operation sound has become...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D3/12
CPCF16G1/28B62D5/0424F16H7/023
Inventor 山口真司
Owner JTEKT CORP