A balance shaft structure for a motorcycle engine

By introducing a gear assembly buffer design and balancing component distribution into the motorcycle engine balance shaft, the problems of gear damage and inconvenient disassembly caused by excessive stress in the prior art have been solved, achieving a longer service life and improved stability of the gear structure.

CN224283396UActive Publication Date: 2026-05-26WENLING XINLI INTELLIGENT MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WENLING XINLI INTELLIGENT MASCH CO LTD
Filing Date
2025-05-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The balance shaft structure of existing motorcycle engines is prone to damage under high acceleration due to excessive stress on the shock absorber springs, which can lead to damage to the driven gear structure and make disassembly and assembly inconvenient.

Method used

The design employs a gear assembly buffer, including an inner gear ring, push block, elastic element, and elastic frame support. The buffering effect is achieved through the cooperation of the buffer groove and elastic element, and the connecting components such as anti-loosening bolts and washers facilitate disassembly and assembly. The balancing components, such as the central eccentric block and the side eccentric block, are evenly distributed to reduce vibration force and increase stability.

Benefits of technology

It extends the service life of the gear structure, avoids damage to elastic components due to excessive stress, simplifies the disassembly and assembly process, and improves the vibration reduction effect and connection strength of the engine.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the technical field of motorcycle engines, and in particular to a balance shaft structure for a motorcycle engine, which extends the service life of the gear structure and facilitates disassembly and assembly; it includes a shaft body, gear assemblies, connecting parts, and balance parts. The gear assemblies are located on the left and right sides of the shaft body, the connecting parts are installed on the left and right sides to fix the gear assembly, and the balance parts are evenly distributed on the shaft body.
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