Motor Control Board Cover Alignment for Fewer Assembly Parts
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Solution Overview
Problem
Existing motor devices with integrated electric motors and control boards require multiple parts and assembly processes, increasing complexity and part count.
Innovation Solution
A control device with a control board, housing, and cover featuring positioning holes and tapered positioning pins for precise alignment, simplifying assembly by reducing the number of parts and processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the control board and cover are individually fixed to the housing with bolts or positioning pins, then the positional accuracy is maintained, but the number of parts and assembly processes increases
Solution Approach 1:
The patent merges the control board and cover into a single integrated control board assembly. The control board is designed with an integrated cover structure that directly covers the control board, eliminating the need for separate fixing operations. This integration reduces the number of parts while maintaining positional accuracy through the unified structure design.
Solution Approach 2:
The control board is designed to serve multiple functions: it provides electrical control functionality while its integrated cover structure simultaneously provides protection and positioning. The cover integration allows the control board to fulfill both circuit board and protective cover roles, reducing the need for separate components.
2Stability of the object's composition
If the control board and cover are individually fixed to the housing, then the structural stability is maintained, but the number of assembly processes increases
Solution Approach 1:
The control board and cover are merged into a single integrated assembly that is fixed to the housing as one unit. This reduces multiple separate assembly operations (fixing control board, then fixing cover) into a single assembly operation, improving productivity while maintaining structural stability through the unified structure.
Solution Approach 2:
The cover is preliminarily integrated with the control board during manufacturing, creating a pre-assembled control board assembly. This preliminary integration ensures proper positioning and structural stability before the final assembly to the housing, reducing on-site assembly complexity and improving efficiency.
3Strength
If traditional fixing methods with bolts are used, then the structural strength is maintained, but the device weight increases
Solution Approach 1:
The integrated control board assembly eliminates the need for separate bolts and fasteners by incorporating the cover structure directly onto the control board. This merging reduces the total component count and removes the weight of additional fastening hardware while maintaining structural strength through the integrated design.
Solution Approach 2:
The control board assembly utilizes composite material construction, combining the control board substrate with the cover structure in a unified design. This composite approach allows for optimized material selection and weight reduction while maintaining the required structural strength through intelligent material distribution and structural design.
Data Source
AI summary
A control device includes a control board on which a control circuit for controlling an electric motor is mounted, a housing that supports a surface on a side of the control board in a thickness direction, and a cover attached to the housing to cover a surface on the other side of the control board in the thickness direction and a periphery of the control board. First positioning holes penetrating in the thickness direction are formed in the control board. Second positioning holes respectively corresponding to the first positioning holes are formed in the housing. The cover includes positioning pins that protrude toward the housing and have a tapered shape in which a diameter of a circumscribed circle gradually decreases toward a tip. The positioning pin is inserted into the first positioning hole and the second positioning hole corresponding thereto to position the control board, the housing, and the cover.