Wheel Cap Engagement Leg Geometry for Rattle-Free Retention
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Solution Overview
Problem
Existing wheel caps experience rattling and uncoupling issues due to insufficient engagement with the wheel, leading to instability and potential loss.
Innovation Solution
A wheel cap design featuring engagement legs with different angles of insertion and an urging member to secure the cap body to the wheel, utilizing engagement claws with varying angles and a spring mechanism to enhance stability and prevent uncoupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two claw bodies of the attachment claw undergo similar elastic deformation to hook onto hole edges, then the wheel cap can be attached to the wheel, but rattling occurs and uncoupling cannot be suppressed
Solution Approach 1:
The patent applies asymmetry by making the first and second engagement legs have different angles with respect to the insertion direction. The first engagement leg abuts at a first angle while the second engagement leg abuts at a second angle that is greater than the first angle. This asymmetric angular configuration creates differential urging forces that suppress rattling and prevent uncoupling, resolving the technical contradiction between attachment stability and rattling suppression.
2Reliability
If the engagement legs are inserted at similar angles, then the structure is simple, but the urging force is insufficient to prevent uncoupling
Solution Approach 1:
The patent applies parameter changes by varying the angular parameters of the engagement legs. Specifically, the first engagement leg is configured to abut at a first angle while the second engagement leg abuts at a second angle that is greater than the first angle. This parameter variation optimizes the urging force distribution to effectively suppress uncoupling, while the overall structure remains relatively simple by maintaining the basic engagement leg configuration.
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 effectively suppresses rattling and uncoupling by applying balanced loads through angled engagement legs and a spring mechanism, ensuring secure attachment and reduced movement.
Implementation Method 1
The two claw bodies of the attachment claw each undergo similar elastic deformation and are hooked onto the hole edges of the two heat dissipation holes
Data Source
AI summary
A wheel cap includes a cap body having a wheel side face and another face serving as a styling face on an opposite side from the wheel side face; a first engagement leg provided standing out from the wheel side face and configured to be inserted into a through hole of the wheel, with the first engagement leg abutting a first attachment portion of a peripheral edge of the through hole at a first angle with respect to an insertion direction; and a second engagement leg provided standing out from the wheel side face as a pair with the first engagement leg and configured to be inserted into the through hole of the wheel, with the second engagement leg abutting a second attachment portion at the peripheral edge of the through hole at a second angle with respect to the insertion direction, the second angle being greater than the first angle.