Vehicle Sash Cover Spacer Cap Friction Noise Reduction
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Solution Overview
Problem
The movement of a sash cover relative to a vehicular door sash generates undesired noise due to similar coefficients of friction between the materials used in conventional sash covers and sash panels.
Innovation Solution
A sash cover assembly that includes a spacer cap made of a different material, such as rubber, which surrounds a projection of the sash cover and is positioned between the sash panel and the projection to prevent direct contact, thereby altering the friction coefficients and eliminating noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sash cover is directly connected to a sash panel using conventional materials, then the structure is simple and manufacturing is easy, but noise is generated due to similar coefficients of friction between the materials
Solution Approach 1:
A spacer cap made of a material with a different coefficient of friction (such as rubber) is introduced as an intermediary component between the sash cover projection and the sash panel. This mediator prevents direct contact between the original sash cover materials, thereby eliminating the noise generated by their similar friction coefficients while maintaining the structural connection.
2Object-generated harmful factors
If a spacer cap is added to prevent noise, then noise generation is eliminated, but the device complexity increases
Solution Approach 1:
The connection system is segmented into distinct functional components: the sash cover projection, the spacer cap, and the sash panel receiving structure. By dividing the original direct-contact system into separate elements with the spacer cap serving as an independent noise-prevention component, the solution adds minimal complexity while effectively addressing the noise issue.
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 spacer cap effectively prevents contact between the sash panel and the projection, substantially eliminating noise from the movement of the sash cover relative to the sash panel by utilizing materials with different friction coefficients.
Implementation Method 1
The spacer cap is made of a different material, such as rubber, which surrounds a projection of the sash cover and is positioned between the sash panel and the projection to prevent direct contact, thereby altering the friction coefficients and eliminating noise generation
Data Source
AI summary
A sash cover assembly for a vehicle includes a sash cover and a spacer cap. The sash cover includes a projection configured to be received by a sash of the vehicle. The spacer cap is connected to and surrounds the projection. The spacer cap is configured to prevent contact between the projection and the sash when the sash cover is connected to the sash.