Elastic Retaining Protrusion for Gap Reduction in Mated Components
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Solution Overview
Problem
Components mated together often experience positional variations due to manufacturing variances, leading to significant gaps and poor fit, which can result in relative motion, squeaking, and rattling.
Innovation Solution
An elastic retaining arrangement featuring elastically deformable protrusions on one component that engage with apertures on another component, allowing for elastic deformation to achieve a tight, fitted engagement and reduce gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional male alignment features with clearance are used to mate components, then assembly ease and tolerance accommodation are improved, but positional precision and gap uniformity deteriorate
Solution Approach 1:
The patent changes the physical state of the retaining feature from rigid to elastically deformable. The retaining feature is made of elastically deformable material that can temporarily deform during assembly to accommodate clearance variations, then springs back to maintain precise positioning and eliminate gaps between mated components.
Solution Approach 2:
The patent introduces dynamic behavior to the retaining feature by making it elastically deformable. The feature dynamically adapts its shape during assembly to accommodate positional variations, then stabilizes in a deformed state that maintains tight contact and eliminates gaps, transforming a static clearance problem into a dynamic solution.
2Adaptability or versatility
If clearance is provided in alignment features to accommodate manufacturing variances, then adaptability to tolerance variations is improved, but relative motion and instability between mated components worsen
Solution Approach 1:
The patent changes the mechanical property of the retaining feature to be elastically deformable, allowing it to adapt to tolerance variations through controlled deformation while maintaining stable contact. The elastic material deforms to accommodate clearance but maintains consistent contact pressure, preventing relative motion and ensuring stability.
Solution Approach 2:
The elastically deformable retaining feature automatically adjusts itself to accommodate manufacturing variances without external intervention. The material's inherent elasticity allows it to self-deform during assembly and self-maintain stable contact, eliminating the need for additional adjustment mechanisms or external fastening operations.
3Manufacturing precision
If elastically deformable protrusions are used to engage with apertures, then positional precision and gap reduction are improved, but device complexity increases
Solution Approach 1:
The patent achieves precise positioning by changing the material parameter of the retaining feature to be elastically deformable. This single material property change allows the feature to spring into precise alignment with the aperture and maintain tight contact, eliminating gaps without requiring complex adjustment mechanisms or multiple components.
Solution Approach 2:
The patent combines multiple functions into a single elastically deformable retaining feature: alignment, retention, and gap elimination are all achieved by one integrated feature rather than separate components. The elastic protrusion simultaneously provides positioning and securing functions, simplifying the overall assembly structure.
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 elastic retaining arrangement effectively minimizes gaps and misalignments by averaging positional errors, ensuring precise alignment and reducing undesirable noise and motion between mated components.
Implementation Method 1
an elastically deformable protrusion extending away from the first main body portion of the first component, the elastically deformable protrusion configured to fittingly engage the aperture proximate an end region of the aperture wall, wherein the elastically deformable protrusion is formed of an elastically deformable material and configured to elastically deform upon engagement with the aperture wall
Data Source
AI summary
A retaining arrangement includes a first component having a first main body portion and a first interface edge. Also included is a second component operatively coupled to the first component, the second component comprising a second main body portion, a second interface edge in contact with the first interface edge, and an end portion in an overlapped configuration with the first main body portion of the first component. Further included is an aperture defined by an aperture wall and extending through the end portion of the second component. Yet further included is an elastically deformable protrusion extending away from the first main body portion of the first component, the elastically deformable protrusion configured to fittingly engage the aperture proximate an end region of the aperture wall, wherein the elastically deformable protrusion is formed of an elastically deformable material and configured to elastically deform upon engagement with the aperture wall.