Insulation Cover Fixing Structure for Power Modules
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Solution Overview
Problem
Existing insulation cover fixing structures for power conversion modules, which rely on double-sided adhesive for attachment, are prone to displacement under external forces due to adhesive degradation from heat, compromising insulation and protection performance.
Innovation Solution
A fixing structure that employs an engaging unit with tongues and through holes to securely fasten the insulation cover and metal shielding cover without the need for double-sided adhesive, ensuring stable attachment and reduced risk of displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If double-sided adhesive is used to fix the insulation cover and metal shielding cover, then the initial attachment is achieved, but the insulation cover is easily displaced under external force due to adhesive deterioration from heat
Solution Approach 1:
The patent replaces the chemical bonding method (double-sided adhesive) with a mechanical fastening system consisting of positioning protrusions and positioning grooves. The protrusions on one component fit into corresponding grooves on the other component, creating a mechanical interlock that prevents displacement under external forces and eliminates the problem of adhesive deterioration from heat.
2Ease of manufacture
If double-sided adhesive is used for fixing, then attachment is achieved, but the insulation and protection performance is reduced due to displacement
Solution Approach 1:
The patent replaces the chemical bonding method (double-sided adhesive) with a mechanical fastening system consisting of positioning protrusions and positioning grooves. The protrusions on one component fit into corresponding grooves on the other component, creating a mechanical interlock that prevents displacement under external forces and eliminates the problem of adhesive deterioration from heat.
3Stability of the object's composition
If engaging unit with tongues and through holes is used, then displacement is prevented and attachment stability is improved, but the device complexity increases
Solution Approach 1:
The patent divides the fastening function into separate structural elements: positioning protrusions on one component and corresponding positioning grooves on the other component. This segmentation allows each part to be independently manufactured and assembled, while the interlocking geometry provides stable mechanical fastening without requiring complex additional mechanisms.
Data Source
AI summary
An insulation cover fixing structure and a protection device include a first insulation, a first metal shielding cover and an engaging unit. The first insulation cover includes a first bottom plate and a first side plate. The first metal shielding cover is disposed at an outer side of the first insulation cover. The first metal shielding cover includes a second bottom plate and a second side plate. The engaging unit is disposed on at least one of the first insulation cover and the first metal shielding cover. The first metal shielding cover and the first insulation cover are fixed by the engaging unit. The engaging unit includes a first tongue extended with bend from one of the first side plate and the second side plate toward the other and a second tongue extended from the first tongue. The second tongue is pressed against the other of the first side plate and the second side plate.