Sinusoidal Guide Rib Structure for Sliding Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional guide rib structures for vehicle parts, such as B-pillar trim pieces, suffer from intermittent contact points between the slider and the substrate, leading to discontinuous sliding motion, which is not feasible with conventional molding processes due to manufacturing complexities and fragility issues.
Innovation Solution
A guide rib structure with one or more ribs defining inclined planes, such as sinusoidal or trapezoidal wave patterns, is integrated into the substrate to constrain lateral motion of the slider, providing a continuous contact and smoother sliding operation, while being compatible with conventional molding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional guide rib structures with vertical ribs are used, then lateral movement of the slider is constrained, but intermittent contact points create discontinuous sliding motion
Solution Approach 1:
The patent applies curvature by replacing straight vertical ribs with sinusoidal or trapezoidal wave patterns. These curved/undulating rib structures maintain continuous contact with the slider during translation, eliminating the intermittent contact points created by straight ribs while still effectively constraining lateral movement.
2Ease of operation
If an integral guide rib structure with continuous contact is provided, then sliding smoothness is improved, but manufacturing complexity increases and extraction from mold becomes difficult
Solution Approach 1:
The patent segments the wave pattern into repeating sinusoidal or trapezoidal units along the rib structure. This segmentation allows the complex curved geometry to be manufactured using conventional molding processes by breaking down the continuous wave pattern into manageable, repeatable sections that can be formed in standard molds.
Solution Approach 2:
The patent employs periodic wave patterns (sinusoidal or trapezoidal) that repeat at regular intervals along the guide rib structure. This periodicity enables the use of conventional cyclic molding processes, where the repeating geometry aligns with the periodic nature of mold opening and closing actions, facilitating easy extraction without specialized tooling.
3Reliability
If specialized molding techniques are used to create integral guide rib structure, then continuous contact is achieved, but production cost increases
Solution Approach 1:
The patent changes the geometric parameters of the guide ribs from straight vertical lines to sinusoidal or trapezoidal wave patterns with specific wavelengths and amplitudes. These parameter changes allow the structure to achieve continuous contact functionality while remaining compatible with conventional molding processes, avoiding the need for expensive specialized molding techniques like gas-assisted injection.
Data Source
AI summary
A sliding mechanism a first part and a second part adapted for sliding translation within the first part. A guide rib structure is included on the first part to constrain a lateral motion of the second part, including one or more ribs each defining at least one inclined plane. The guide rib structure may be a continuous rib member defining a sinusoidal or trapezoidal wave pattern, or may include a plurality of ribs each defining an inclined plane.