Motor Driver Housing Coupling Structure for Load Resistance
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Solution Overview
Problem
Conventional motor driving devices face increased product costs and longer assembly times due to the need for a separate metal fastening structure, limited miniaturization, and vulnerability to horizontal loads, particularly shearing stress, in their coupling mechanisms.
Innovation Solution
A device with a coupling structure between the main and auxiliary housings featuring a coupling groove, vent holes, and strength-enhancing grooves and pieces, allowing for secure fastening and reduced material usage, using a non-metallic main housing and a metal auxiliary housing with brackets and caps for enhanced durability and grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate metal fastening structure is used to couple the auxiliary housing to the heat sink, then the coupling strength is improved, but the product cost and assembly time increase
Solution Approach 1:
The patent integrates the fastening function directly into the auxiliary housing by forming coupling protrusions that engage with coupling grooves on the heat sink. This merging of the fastening structure into the auxiliary housing eliminates the need for separate metal fastening components, thereby reducing product cost and assembly complexity while maintaining coupling strength.
2Stability of the object's composition
If the heat sink is enlarged to provide a mounting surface for the auxiliary housing, then the coupling stability is improved, but the overall product size and weight increase
Solution Approach 1:
The patent segments the coupling function by creating dedicated coupling protrusions on the auxiliary housing that engage with corresponding grooves on the heat sink. This segmentation allows the coupling mechanism to be distributed across both components rather than requiring a large centralized mounting area, enabling stable coupling without enlarging the heat sink or overall product volume.
3Ease of manufacture
If the auxiliary housing is coupled only to the heat sink via screw coupling, then the assembly simplicity is improved, but the resistance to horizontal loads and shearing stress deteriorates
Solution Approach 1:
The patent employs a composite coupling approach where the auxiliary housing is coupled to both the heat sink (providing thermal management and structural support) and the main housing (providing additional mechanical support and load bearing). This composite coupling structure distributes horizontal loads and shearing stresses across multiple attachment points, enhancing load resistance while maintaining assembly simplicity through standardized coupling mechanisms.
Data Source
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AI summary
The present invention relates to a device for driving a motor, the device comprising: a main housing for accommodating a circuit module therein, wherein a top of the main housing is partially opened to define an open portion; an input/output (IO) cover coupled to the main housing so as to occupy the open portion; and an auxiliary housing coupled to the main housing at an vertical side face of the main housing.