A method for sealing the base oil of a steering system worm gear

By employing a multi-seal structure consisting of a pressure block, oil seal, conical surface fit, and O-ring, the problem of easy leakage in the base oil seal of the worm gear is solved, achieving automatic compensation of the worm gear transmission clearance and sealing stability, thus adapting to the long-term durable operation of the electronic power steering system.

CN122305190APending Publication Date: 2026-06-30ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Filing Date
2026-05-08
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing worm gear base oil sealing mechanisms are prone to aging and leakage, especially when the vehicle is bumpy, the base oil is easily splashed out, resulting in poor sealing performance and affecting the stability and durability of the steering system.

Method used

It adopts an axial motion seal with a combination of pressure block and oil seal, combined with a double-layer sealing structure of conical surface of end cover and housing and O-ring, and equipped with oil-absorbing cotton to form a multi-combination sealing system to ensure the stability and durability of the sealing effect.

Benefits of technology

It achieves automatic compensation for worm gear transmission clearance and multi-level base oil sealing, reducing the probability of oil leakage failure and improving the long-term operational reliability and durability of the steering system.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of steering system technology, specifically a method for sealing the base oil of a steering system worm gear. The method includes: providing a housing having a cavity for accommodating a clearance adjuster and an open end, with a bearing provided within the cavity of the clearance adjuster; providing an end cap for closing the open end of the housing; and providing a pressure block, which is movably inserted into a mounting hole on the housing corresponding to the bearing, such that one end of the pressure block contacts the outer circle of the bearing, and the other end receives pressure from a leaf spring. An oil seal is provided between the pressure block and the mounting hole to achieve axial movement sealing. This invention achieves complete isolation between the spring pressure end and the cavity lubrication area, replacing the traditional irregular through-hole damping sheet sealing structure, avoiding the risk of leakage at the spring mounting position from the source, while ensuring stable transmission of clearance compensation thrust, and achieving continuous automatic compensation of the worm gear meshing clearance.
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