Sealed cross shaft universal joint for passenger car

By incorporating multiple sealing structures and adsorption blocks on the universal joint cross shaft of passenger vehicles, the problems of sealing and lubricating oil leakage are solved, achieving efficient protection and lubrication effects, and improving the stability and lifespan of the universal joint.

CN224214598UActive Publication Date: 2026-05-08HANGZHOU FENGJIAO STEERING PARTS CO LTD
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Patent Information

Application Number
CN202521468558.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2026-05-08
Estimated Expiration
2035-07-14

AI Technical Summary

Technical Problem

The existing universal joint cross shafts used in passenger cars have a simple sealing structure, which makes them susceptible to the intrusion of external impurities and lubricant leakage, leading to component wear and affecting service life and transmission performance.

Method used

It adopts a multi-seal structure, including an external C-type oil seal, an internal star-shaped oil seal and an elastic O-ring, and an adsorption block is set inside the bushing. Combined with the protective half-shell and the oil filling port, it can achieve multiple protections and lubrication management.

Benefits of technology

It effectively prevents impurities from entering and lubricating oil from leaking, reduces component wear, improves the sealing performance and service life of the universal joint, and ensures the stability and reliability of transmission performance.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to the technical field of cross shafts, and discloses a sealing cross shaft universal joint for a passenger car, which comprises a cross shaft body, a shaft neck, a shaft sleeve and a roller pin rotationally arranged between the shaft sleeve and the shaft neck, two symmetrically arranged protective half shells are sleeved outside the cross shaft body, a fixing hole is formed in the diagonal position of any protective half shell, and the shaft neck is sleeved outside the shaft sleeve. Fixing holes are formed in the shaft neck, fixing rods used in cooperation with the fixing holes are arranged at the other two opposite angle positions of each protection half shell, a through oil injection opening is formed in any protection half shell and used for injecting grease into an inner cavity of the corresponding protection half shell, a first oil seal is further arranged on the shaft neck and is an external C-shaped oil seal, and a second oil seal is arranged on the shaft neck and is used for sealing the outer C-shaped oil seal. The second oil seal is arranged at the position of an inner port of the shaft sleeve and is a built-in star-shaped oil seal, the first oil seal and the second oil seal are used for preventing impurities from entering and lubricating oil from flowing out, and the problems that existing equipment is prone to being damaged by the impurities in the external environment, and lubricating oil is prone to leaking are solved.
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