Rotatable Holder for Motor Temperature Sensor Alignment
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Solution Overview
Problem
Existing electric motor designs face challenges in accommodating size variations of temperature detection elements, leading to inconsistent contact with the coil end portion, resulting in a narrow tolerable range for size variation.
Innovation Solution
A holder with a circular pillar shape, featuring a recessed portion for housing the temperature detection element and a wing portion that extends outward, allowing for adjustment and bonding to the coil, enabling consistent contact even with size variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature detection element is inserted into a guide provided in the space between the coil end and the core, then the temperature sensitive portion contacts the inner surface of the winding, but the tolerable range for size variation of the temperature detection element becomes extremely narrow
Solution Approach 1:
The holder is designed to rotate about the central axis of the holder body, enabling dynamic adjustment of the temperature detection element's position. This rotation allows the temperature sensitive portion to contact the coil end portion regardless of size variations, transforming a static positioning problem into a dynamic solution that adapts to different element dimensions.
Solution Approach 2:
The holder acts as an intermediary mechanism between the temperature detection element and the coil end portion. Instead of directly inserting the temperature detection element into a fixed guide, the holder mediates the positioning process by providing a rotatable structure that facilitates reliable contact while accommodating size variations.
2Adaptability or versatility
If the temperature detection element size varies, then manufacturing flexibility is improved, but consistent contact with the coil end portion cannot be ensured
Solution Approach 1:
The rotatable holder structure dynamically adjusts the position of the temperature detection element to ensure consistent contact with the coil end portion, regardless of manufacturing variations in element size. The rotation capability compensates for dimensional tolerances while maintaining precise contact.
Solution Approach 2:
The invention changes the positioning parameter from fixed insertion depth to rotatable angular/positional adjustment. By allowing the holder to rotate, the system can compensate for size variations in the temperature detection element while maintaining consistent contact pressure and position with the coil end portion.
Data Source
AI summary
A holder for fixing a temperature detection element to a coil includes: a holder body shaped as a circular pillar; a recessed portion formed on a circumferential surface of the holder body, along a central axis of the holder body; a wing portion that extends farther outward than the circumferential surface of the holder body, along a direction intersecting the central axis of the holder body; and a temperature detection element that is housed in the recessed portion so that a portion of the temperature detection element protrudes from the circumferential surface of the holder body.