Retainer Clip Geometry for Ribbed Cast Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automotive manufacturers face challenges in attaching retainer clips to cast structures without requiring pre-formed openings, as traditional methods are not suitable for these materials.
Innovation Solution
A retainer clip system that includes a body portion with a female fastener, tabs, and resilient retention clips, which can engage and retain ribs on cast components without the need for pre-formed openings, using a combination of interference fits and engagement features to secure the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fastening methods using openings are used, then reliable connection is achieved, but cast structures cannot be attached
Solution Approach 1:
The fastening system is divided into separate functional components: a retainer clip with engagement features, a fastener, and the cast structure with integrated ribs. This segmentation allows the retainer clip to attach to the cast structure via the ribs without requiring openings, while the fastener provides additional securing capability, thus resolving the contradiction between adaptability to cast structures and connection reliability.
Solution Approach 2:
The invention transitions from traditional planar attachment requiring openings in the component surface to a three-dimensional attachment method utilizing vertically extending ribs on the cast structure. The retainer clip engages these ribs in a dimensional space that does not compromise the integrity of the cast structure, enabling attachment without openings while maintaining reliability.
2Ease of manufacture
If openings are formed in cast structures, then retainer clips can be attached, but manufacturing complexity increases
Solution Approach 1:
The ribs are pre-formed as integral features of the cast structure during the casting process itself, before any assembly operations. This preliminary action eliminates the need for subsequent drilling, cutting, or forming of openings, thereby simplifying the overall manufacturing process while enabling retainer clip attachment.
Solution Approach 2:
The cast structure provides its own attachment features (ribs) as an inherent part of its geometry, eliminating the need for external modification or additional components to create attachment points. The structure serves its own fastening needs through the integrated rib design, reducing manufacturing complexity.
3Strength
If retainer clips are designed for permanent attachment, then connection strength is improved, but serviceability is reduced
Solution Approach 1:
The retainer clip incorporates resilient elements and engagement features that provide strong attachment during normal operation but allow for controlled disengagement when needed. The fastener system enables dynamic adjustment between secured and released states, maintaining connection strength during use while preserving serviceability for repair or replacement operations.
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
Enables reliable and efficient attachment of components with ribs, providing a serviceable connection that mitigates pullout and allows for easy assembly and disassembly, suitable for various materials including plastics and cast metals.
Implementation Method 1
a plurality of retention clips resiliently coupled to the body portion
Implementation Method 2
using a combination of interference fits and engagement features to secure the components
Data Source
AI summary
Disclosed is a retainer to couple a first component to a second component having a rib via a male fastener. The retainer includes a body portion, one or more tabs coupled to the body portion; and retention clips resiliently coupled to the body portion. The body portion includes or defines a female fastener to receive the male fastener. The one or more tabs and at least one of the plurality of retention clips cooperate to define a cavity to receive the rib. The plurality of retention clips is arranged to engage and retain the rib within the cavity. In some examples, the retainer is a stamped retainer clip.