A connecting rod bushing having an adaptive seal

By incorporating a groove, spring, and limit rod in the connecting rod bushing, the problem of lubricating oil leakage caused by the clearance between the small end of the connecting rod and the piston pin is solved, achieving self-adaptive sealing and wear resistance, and extending the service life of the bushing.

CN224396908UActive Publication Date: 2026-06-23CHANGZHOU JILONG ARCHITECTURE MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGZHOU JILONG ARCHITECTURE MASCH CO LTD
Filing Date
2025-09-15
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The existing connecting rod bushings lack an adaptive sealing structure, which may cause a gap to form between the small end of the connecting rod and the piston pin under different engine operating conditions, resulting in lubricating oil leakage.

Method used

The connecting rod bushing with an adaptive sealing structure includes an outer bushing and a sealing sleeve. The inner wall of the outer bushing is provided with a groove and a spring, and the outer wall of the sealing sleeve is provided with a sliding plate. The sealing sleeve is moved by the spring to compensate for the gap, and the movement direction is limited by the telescopic limit rod. Combined with the wear-resistant sleeve and the sealing ring, a double seal is formed to store lubricating oil to reduce friction.

Benefits of technology

It achieves adaptive sealing under different operating conditions, prevents lubricating oil leakage, extends the service life of the bushing, and reduces friction and wear.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224396908U_ABST
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Abstract

This application relates to a connecting rod bushing with an adaptive sealing structure, belonging to the technical field of connecting rod bushings. It includes an outer bushing and a sealing sleeve. Two mirror-distributed sliding grooves are formed on both sides of the inner wall of the outer bushing. A plurality of springs arranged in a circular array are fixedly connected to the inner wall of the outer bushing. Two mirror-distributed sliding plates are fixedly connected to the outer wall of the sealing sleeve. This application features sliding grooves on both sides of the inner wall of the outer bushing and two sliding plates fixedly connected to the outer wall of the sealing sleeve. During use, the sliding plates can slide within the grooves, guiding the displacement of the sealing sleeve and preventing axial movement. Furthermore, the plurality of springs arranged in a circular array between the outer bushing and the sealing sleeve can push the sealing sleeve to move when the gap between the sealing sleeve and the piston pin changes, compensating for gaps caused by stress and preventing lubricating oil leakage.
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