Automobile column shaft with reduced diameter structure

CN224491195UActive Publication Date: 2026-07-14FENGDU AUTO PARTS (ZHEJIANG) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FENGDU AUTO PARTS (ZHEJIANG) CO LTD
Filing Date
2025-08-27
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In existing automotive steering columns, the inner and outer columns are prone to relative rotation during a collision, which may cause injury to the driver and cannot effectively absorb collision energy.

Method used

The automotive column steering shaft with a reduced diameter structure restricts the relative rotation of the inner and outer columns by setting guide grooves, cages and balls between the inner and outer columns, and absorbs collision energy by using a viscoelastic damping layer and elastic buffer block.

Benefits of technology

It effectively prevents relative rotation between the inner and outer columns, reduces the transmission of collision force to the steering wheel, and converts energy into heat energy through a viscoelastic damping layer and elastic buffer block, reducing injury to the driver.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224491195U_ABST
    Figure CN224491195U_ABST
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Abstract

The utility model discloses a kind of automobile pipe column steering shafts with shrinkage structure, including outer pipe column, mounting bracket, inner pipe column, guide rail groove, retainer and ball, the outer pipe column is installed on mounting bracket, the top end of the inner pipe column and outer pipe column is slidably connected, the bottom end of the inner pipe column is through the inside of outer pipe column and extends downward axially;The inner surface of the outer pipe column is equipped with at least one guide rail groove extending along its axial direction, at least one retainer extending along its axial direction is fixedly installed on the outer surface of the inner pipe column, a plurality of balls are embedded on the retainer, the ball partially protrudes from the surface of the retainer, and is embedded in guide rail groove to form rolling fit, the cross section of the guide rail groove is V-shaped structure, the retainer is the elastic retainer made of elastic material, the two sides of the retainer are provided with elastic limiting arm bending to the direction of ball, the utility model can avoid the relative rotation of inner and outer pipe column, thereby reducing the risk of driver injury.
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