EPS Metal Cover Reinforcement Around Connector Exposure Hole
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing electric power steering devices face challenges in maintaining mechanical strength and liquid tightness due to the deformation of metal covers with reduced plate thickness, which can compromise the functionality of the connector assembly's exposure hole and surrounding areas.
Innovation Solution
The implementation of an annular reinforcing projecting portion at the edge of the exposure hole in the metal cover, combined with an annular seal accommodating portion filled with a liquid sealing agent, enhances the mechanical strength and ensures liquid tightness by preventing deformation and maintaining the integrity of the metal cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the plate thickness of the metal cover is reduced for cost and weight reduction, then the weight and cost are reduced, but the mechanical strength and resistance to deformation of the metal cover deteriorates
Solution Approach 1:
The invention applies local reinforcement by forming a reinforcing projecting portion at the specific location where the exposure hole is formed in the metal cover. This local quality change allows the plate thickness to be reduced overall while maintaining strength at the critical area surrounding the exposure hole, resolving the contradiction between weight reduction and mechanical strength.
2Weight of moving object
If the plate thickness of the metal cover is reduced, then the cost and weight are reduced, but the liquid tightness around the exposure hole deteriorates due to deformation
Solution Approach 1:
The reinforcing projecting portion is formed locally at the exposure hole area to prevent deformation that would compromise liquid tightness. This localized reinforcement maintains the sealing function while allowing the overall plate thickness to be reduced for weight and cost savings.
3Weight of moving object
If the plate thickness of the metal cover is reduced, then the weight and cost are reduced, but the deformation of the metal cover during assembly and use increases
Solution Approach 1:
The invention introduces a reinforcing projecting portion at the critical area (exposure hole) to maintain structural stability locally. This allows the overall plate thickness to be reduced while preventing deformation during assembly and use, as the reinforcing structure provides the necessary rigidity at the vulnerable area.
Data Source
AI summary
An electric power steering device includes a motor housing of an electric motor. The motor housing includes an end face part opposite to an output part of a rotating shaft of the electric motor. An electronic control part is arranged at the end face part. A connector assembly is arranged on a side of the electronic control part opposite to a side of the electronic control part that faces the end face part. A metal cover for the electronic control part includes a bottom part and a lateral peripheral part. The bottom part includes: an exposure hole through which an external terminal forming part is exposed to outside; and an annular reinforcing projecting portion formed at an edge of the exposure hole. The lateral peripheral part is angled from the bottom part, and forms an opening through which the lateral peripheral part is fixed to the end face part.