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Automatic clearance adjusting mechanism for worm and gear of automobile electric power steering gear

A technology of electric power steering and worm gears, which is applied in the direction of electric steering mechanisms, mechanical steering gears, mechanical equipment, etc., can solve problems such as changes in the meshing gap of worm gears, affecting the meshing performance of worm gears, and affecting the handling stability of automobiles, etc., to achieve The effect of ensuring stability

Inactive Publication Date: 2012-11-07
YUBEI XINXIANG POWER STEERING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since the worm wheel material of the worm gear reduction mechanism for automobile electric power steering is made of nylon alloy material, this material has the advantages of self-lubrication and wear resistance, but the material is greatly affected by temperature and air humidity, resulting in the meshing gap of the worm gear Changes with the change of the external environment temperature, affecting the meshing of the worm gear, resulting in light and heavy driving, affecting the stability of car handling

Method used

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  • Automatic clearance adjusting mechanism for worm and gear of automobile electric power steering gear
  • Automatic clearance adjusting mechanism for worm and gear of automobile electric power steering gear
  • Automatic clearance adjusting mechanism for worm and gear of automobile electric power steering gear

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Said worm top bearing 5 is a self-aligning ball bearing, and its model is: 1302.

[0021] The adjustment ring 8 is made of PA6 nylon material, and the parameters of the adjustment ring 8 are as follows:

[0022] t=7mm, t1=12mm, δ=1.4mm, δ1=2mm, s=0.95mm. The number of connecting ribs 8c is 2, and the included angle between the central line of the connecting ribs 8c and the axis of the ejector pin hole 8d is 75°.

Embodiment 2

[0024] The said worm top bearing 5 is self-aligning ball bearing, its model is: 1302TN1

[0025] The adjustment ring 8 is made of PA66 nylon material, and the parameters of the adjustment ring 8 are as follows:

[0026] t=7mm, t1=9mm, δ=1.4mm, δ1=1.2mm, s=1.5mm. The number of the connecting rib 8c is one, and the included angle between the center line of the connecting rib 8c and the axis of the ejector hole 8d is 60°.

Embodiment 3

[0028] Said worm top bearing 5 is a self-aligning ball bearing, and its size is: the outer diameter is 42mm, the inner diameter is 15mm, and the width is 10mm.

[0029] The adjustment ring 8 is made of PA12 nylon material, and the parameters of the adjustment ring 8 are as follows:

[0030] t=8mm, t1=12mm, δ=2.5mm, δ1=3mm, s=1.7mm. The number of the connecting rib 8c is one, and the included angle between the central line of the connecting rib 8c and the axis of the ejector pin hole 8d is 75°.

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Abstract

The invention belongs to the technique of an automobile electric power steering gear, and relates to an automatic clearance adjusting mechanism for a worm and gear of the automobile electric power steering gear. The automatic clearance adjusting mechanism comprises a steering shell (1), the worm wheel (2), the worm (3), a worm bottom bearing (4), a worm top bearing (5), and a worm top bearing clamping nut (6). The automatic clearance adjusting mechanism is characterized in that the worm top bearing (5) is a self-aligning ball bearing. An adjusting ring (8) is mounted in a mounting blind hole (1a) of the worm bottom bearing. An elastic push rod component (7) is mounted on a position, which corresponds to the mounting blind hole (1a) of the worm bottom bearing, of the steering shell (1). By the automatic clearance adjusting mechanism, automatic compensation to meshing clearance, which changes with external environment temperature, of the worm and gear of the automobile electric power steering gear can be achieved, and accordingly constant changing of driving feel is avoided, and stable operation of an automobile is guaranteed.

Description

technical field [0001] The invention belongs to the technology of electric power steering for automobiles, and relates to the improvement of the worm gear mechanism of electric power steering for automobiles. Background technique [0002] Since the worm wheel material of the worm gear reduction mechanism for automobile electric power steering is made of nylon alloy material, this material has the advantages of self-lubrication and wear resistance, but the material is greatly affected by temperature and air humidity, resulting in the meshing gap of the worm gear It changes with the change of the external environment temperature, which affects the meshing performance of the worm gear, which causes the driving feel to be light and sometimes heavy, and affects the stability of the car handling. Contents of the invention [0003] The object of the present invention is to propose an automatic adjustment mechanism for the worm gear gap of an automobile electric power steering, wh...

Claims

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Application Information

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IPC IPC(8): B62D3/04B62D5/04F16H57/12F16H57/039
Inventor 王睿孙献忠田勇陈崇宾
Owner YUBEI XINXIANG POWER STEERING SYST
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