Motor Connector Positioning to Prevent Surface Contact Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing motor designs with connectors exposed from the resin sealing member are prone to damage when mounted on a workbench with the opposite-to-output side facing downwards, as the connector's end portion can contact the surface, leading to potential damage and increased manufacturing costs due to excessive resin usage.
Innovation Solution
The motor incorporates a resin sealing member with two protruded parts on the opposite-to-output side, positioning the connector's end portion on the output side of an imaginary face intersecting the rotation center line, ensuring the connector is not contacted with the placing surface when the motor is mounted with the opposite-to-output side down, and includes a bearing member holding part to enhance heat dissipation and protect the coil wire connecting parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connector is exposed from the resin sealing member to enable cable connection, then the ease of operation is improved, but the reliability deteriorates because the connector may contact the placing surface and get damaged
Solution Approach 1:
The patent positions the connector in a specific spatial relationship to the resin sealing member, exposing it from the opposite-to-output side while controlling its projection distance. This dimensional arrangement allows the connector to be accessible for cable connection while preventing contact with the placing surface when the motor is mounted with the opposite-to-output side down.
2Ease of operation
If the connector is exposed from the resin sealing member, then the ease of operation is improved, but the manufacturing cost increases due to excessive resin usage
Solution Approach 1:
The patent optimizes the geometric parameters of the resin sealing member, specifically controlling the extent to which the connector is exposed. By adjusting the projection distance and positioning of the connector relative to the resin sealing member, the design achieves cable accessibility while minimizing resin material usage.
3Ease of operation
If the connector is positioned closer to the opposite-to-output side for cable connection, then the ease of operation is improved, but the reliability worsens as the connector is more likely to contact the placing surface
Solution Approach 1:
The patent resolves this contradiction by utilizing the vertical dimension relative to the placing surface. The connector is positioned to project from the opposite-to-output side, creating a configuration where the motor's mounting orientation causes the connector to clear the placing surface, thus protecting it while maintaining accessibility.
Data Source
AI summary
A motor includes a rotor, a stator having coils, a connector for supplying electrical power to the coils, and a resin sealing member. The resin sealing member comprises an opposite-to-output side sealing part and a connector sealing part covering the connector. The connector comprises a frame part into which the cable side connector is to be inserted, and the opposite-to-output side sealing part comprises a first protruded part and a second protruded part. A tip end face of the first protruded part and a tip end face of the second protruded part are located on one imaginary face intersecting the rotation center line, a tip end on the opposite-to-output side of the frame part is located on the output side with respect to the imaginary face, and the second protruded part is provided at a position closer to the frame part between the first protruded part and the frame part.