Chain Guide Supplementary Member Attachment for Vibration Reduction
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Solution Overview
Problem
Existing chain guides with integrally formed guide bodies and supplementary members made of different materials suffer from thermal deformation discrepancies, leading to detachment and increased vibration and noise due to gaps formed between the components.
Innovation Solution
A chain guide design featuring a guide body with a guide shoe and a supplementary member made of a different material, where the supplementary member includes an engaging hole for secure attachment to the support wall part, allowing for reduced stress concentration and breakage resistance, and can be made of rubber for enhanced vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the guide body and supplementary member are integrally formed by injection molding, then the manufacturing process is simplified and production efficiency is improved, but thermal deformation differences between different materials cause detachment and reduced reliability
Solution Approach 1:
The patent divides the integrally formed structure into separate components: the guide body and the supplementary member. These components are connected through a support wall part with through holes that allow insertion of engagement protrusions from the supplementary member, creating a mechanically interlocked assembly that accommodates differential thermal expansion while maintaining reliable attachment.
2Reliability
If through holes are provided in the support wall part for engagement, then detachment is partially prevented, but stress concentration in the supplementary member causes cracks and breakage
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs at specific locations within the supplementary member, particularly around the engagement protrusions and through-hole regions. These localized reinforcements strengthen the supplementary member at critical stress concentration points without requiring overall thickening, thus preventing cracks and breakage while maintaining the necessary attachment reliability.
3Object-affected harmful factors
If the supplementary member is made of a material different from the guide body, then vibration absorption is improved, but gaps form due to thermal deformation differences causing increased vibration and noise
Solution Approach 1:
The patent employs dynamics by making the support wall part pivotable relative to the guide body. This pivotable connection allows the support wall part to dynamically adjust its position in response to differential thermal expansion between the guide body and supplementary member, preventing gap formation and eliminating the source of vibration and noise while preserving the vibration absorption benefits of the supplementary member.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design prevents detachment and breakage of the supplementary member, effectively reducing vibration and noise by accommodating thermal deformation differences and allowing for easy assembly and reduced stress concentration.
Implementation Method 1
a supplementary member made of a different material from the guide body... to reduce vibration of the chain guide
Data Source
AI summary
To provide a simple-structured chain guide with improved durability and capable of preventing detachment or breakage of a supplementary member and of reliably reducing vibration and noise. The chain guide includes a supplementary member made of a different material from a guide body. The supplementary member is configured to have an engaging hole, which allows attachment of the supplementary member to a side face of a support wall part provided between a guide part and a base part of the guide body.