Motor Drive Terminal Assembly Layout for Connector Clearance
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Solution Overview
Problem
Existing electric motor drive control devices have a large size due to the arrangement of connectors on the outer periphery of the housing, which limits further miniaturization opportunities.
Innovation Solution
The arrangement of connector heads, including first and second connector heads, is optimized such that they face each other with the motor rotation shaft's axial line between them, allowing for reduced spacing and size reduction by positioning one connector head between the pair, facilitating closer packing without compromising workability during terminal insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If connectors are arranged along the outer periphery of the housing upper surface, then connectors can be easily accessed and connected, but the device size increases due to larger clearances required between connectors
Solution Approach 1:
The patent transitions connector arrangement from a two-dimensional peripheral layout to a three-dimensional configuration where connector heads extend axially from opposite sides of the housing. This dimensional change allows connectors to face each other through the housing thickness, reducing the planar footprint and overall device size while maintaining operational accessibility.
Solution Approach 2:
The connector heads are positioned within the housing structure rather than on its external periphery. The first and second connector heads are nested within the housing volume, with their connection surfaces facing each other through the housing, effectively utilizing internal space to reduce external dimensions.
2Volume of stationary object
If connectors are positioned close together to reduce device size, then miniaturization is achieved, but clearance for terminal insertion and removal becomes insufficient
Solution Approach 1:
The solution moves the clearance requirement from the horizontal plane to the axial dimension. By positioning connector heads on opposite sides of the housing with connection surfaces facing each other, the patent provides adequate insertion clearance along the axial direction while minimizing the planar footprint, thus achieving miniaturization without sacrificing operational clearance.
Data Source
AI summary
One first connector head 21A and one second connector head 22A face each other, in the plane view of a connector terminal assembly 19, with the axial line of an output shaft 12, which is the axial line of the motor rotation shaft of an electric motor, therebetween without being offset from each other. The other first connector head 21B and the other second connector head 22B face each other, in the plane view of the connector terminal assembly 19, with the axial line of the output shaft 12, which is the axial line of the motor rotation shaft of the electric motor, therebetween without being offset from each other.