Resin Component Mounting Structure with Tapered Restriction Wall
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing mounting structures of resin components in vehicles face issues with engagement release due to elastic deformation during assembly, requiring additional processes like heat application and adhesive injection to secure the engagement, which complicates the assembly process and reduces operability.
Innovation Solution
A mounting structure featuring a primary component with an insertion piece and an engagement recessed portion, and a secondary component with an insertion portion, an engagement protruding portion, and a restriction wall that guides and secures the insertion piece, preventing engagement release under shock without increasing assembly processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the engagement piece is elastically deformed to get over the engagement portion during assembly, then the panel and duct can be assembled together, but the engagement piece cannot be completely elastically recovered and remains slightly raised, causing engagement release under shock
Solution Approach 1:
A restriction member is introduced as an intermediary component between the engagement piece and engagement portion. This restriction member includes a restriction portion that limits the elastic deformation of the engagement piece during assembly, preventing excessive deformation that would cause incomplete recovery and subsequent engagement release under shock loads.
Solution Approach 2:
The invention changes the deformation parameter control by introducing the restriction member with a specific restriction portion dimension. This controls the magnitude of elastic deformation within a safe range that allows assembly while ensuring complete elastic recovery, thereby maintaining engagement reliability under varying shock conditions.
2Reliability
If heat is applied to swage the engagement portion or adhesive is injected into the gap to prevent engagement release, then engagement strength is improved, but additional processes are required which deteriorate operability
Solution Approach 1:
The engagement piece itself provides the engagement strength through controlled elastic deformation within the restriction member. The system is self-sufficient and does not require external processes like heat treatment or adhesive injection, thereby maintaining high reliability while keeping the assembly process simple and operational.
Solution Approach 2:
The invention extracts and eliminates the need for additional processes (heat application, adhesive injection) by using the inherent elastic properties of the engagement piece in combination with the restriction member. This removes unnecessary complexity from the assembly process while maintaining engagement strength.
3Ease of manufacture
If the width of the restriction wall is uniformly constant, then manufacturing is simplified, but the engagement piece cannot be properly guided and restricted during insertion
Solution Approach 1:
The restriction wall is designed with an asymmetric width profile that is narrower at the insertion end and wider at the base end. This asymmetric geometry provides effective guidance and positioning for the engagement piece during insertion while remaining manufacturable, achieving both positioning precision and manufacturing simplicity.
Solution Approach 2:
Different sections of the restriction wall have different widths tailored to their specific functions: the narrower upper section provides guidance during insertion, while the wider lower section provides stability and restriction. This local differentiation of quality achieves precise positioning without overly complicating manufacturing.
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 proposed structure effectively secures the engagement between the panel and duct components, preventing release under shock conditions while maintaining the original number of assembly processes, thus enhancing the operability and reliability of the mounting system.
Implementation Method 1
the engagement piece of the panel is elastically deformed to separate away from the engagement portion of the duct upward or downward to get over the engagement portion of the duct, and then elastically recovered to complete the engagement
Data Source
AI summary
A mounting structure of two resin components includes a primary component including an insertion piece extendedly provided from a base portion, and an engagement recessed portion formed in the insertion piece; and a secondary component formed capable of being mounted to the primary component and including an insertion portion configured to guide the insertion piece formed at the base portion, an engagement protruding portion formed in the insertion portion and configured to fit into the engagement recessed portion of the insertion piece, and a restriction wall configured to cover a root side of the insertion piece inserted into the insertion portion, and in a top plan view, a width of the restriction wall being gradually decreased toward a direction separating from a side where the primary component is mounted.