Brake Motor Stator Positioning Structure for Compact Assembly
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Solution Overview
Problem
Existing methods for assembling brake motors result in poor positioning accuracy due to stator shifting during adhesive curing, and an increased axial dimension caused by the positioning concave component at the housing bottom.
Innovation Solution
A motor design featuring a housing with a through hole at the bottom and a concave component on the resin-covered stator core, allowing for precise positioning without shifting, with the concave component's structure facilitating accurate alignment and reducing the axial distance between the stator and housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a positioning concave component is defined at the bottom of the housing, then the housing can be positioned during assembly, but the axial distance between the bottom of the housing and the stator core increases, resulting in a larger motor axial dimension
Solution Approach 1:
The patent merges the positioning function into the resin component itself by forming a positioning convex component on the stator core that fits into a positioning concave component on the housing bottom. This integration eliminates the need for a separate positioning structure at the housing bottom, thereby reducing the axial dimension while maintaining positioning capability.
Solution Approach 2:
The patent transitions the positioning structure from a purely axial arrangement to a radial arrangement by creating a positioning convex component on the stator core that fits into a positioning concave component. This dimensional change allows positioning to occur without increasing the axial distance between the housing bottom and stator core.
2Ease of manufacture
If the stator is pressed into the housing using existing methods, then assembly can be completed, but the position of the stator relative to the housing shifts during adhesive curing, resulting in poor positioning accuracy
Solution Approach 1:
The patent applies preliminary anti-action by creating a positioning convex component on the stator core that fits into a positioning concave component on the housing bottom before adhesive curing. This pre-established mechanical positioning prevents any potential shifting during the adhesive curing process, counteracting the harmful effect of position changes and ensuring high positioning accuracy.
Solution Approach 2:
The patent implements preliminary action by establishing the positioning relationship between the stator and housing through the convex-concave component fit before the adhesive fully cures. This preliminary positioning action ensures that the stator maintains its correct position throughout the adhesive curing process, preventing any shifts that would compromise positioning accuracy.
Data Source
AI summary
Disclosed are a motor and an electrical product. The motor includes a stator and a housing for accommodating the stator. The housing includes a housing wall and a housing bottom, the stator includes a stator core and a resin component at least covering one side of the stator core facing the housing bottom, and one side of the resin component facing the housing bottom has a concave component. One side of the housing bottom facing the resin component has a positioning component, and the positioning component is axially opposite to the concave component. In this way, the concave component is defined in a part of the resin component of the stator core that is axially opposite to the positioning hole, and the positioning pin is inserted into the positioning hole and the concave component to position the housing and the stator core.