Motor Brush Vibration Damping via Deformable Bracket Protrusion
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Solution Overview
Problem
In motors, vibration of the brush can cause damper members to move towards the rotation shaft, hindering electrical contact between the brush and the commutator, leading to noise issues and contact problems.
Innovation Solution
A motor design incorporating a commutator on the rotation shaft, a brush in contact with it, a bracket with a wall surface, and a deformable portion in contact with the brush and the wall surface, featuring protrusions on the commutator side to prevent the deformable portion from moving towards the commutator, ensuring stable electrical contact and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If damper members are fixed to the brush and brush holder to reduce vibration, then noise is reduced, but the damper members may move toward the commutator and hinder electrical contact
Solution Approach 1:
A deformable portion is introduced as an intermediary element between the brush and the bracket. This deformable portion absorbs vibrations while maintaining proper spacing through elastic deformation, preventing direct contact between the damper member and commutator, thus resolving the contradiction between noise reduction and electrical contact reliability
Solution Approach 2:
The bracket includes a protrusion that changes the spatial parameter by protruding toward the brush, maintaining a safe distance between the deformable portion and commutator. This parameter adjustment ensures that even during vibration, the deformable portion cannot move far enough to interfere with electrical contact
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively dampens brush vibration and maintains consistent electrical contact, reducing noise and improving motor performance by preventing the deformable portion from interfering with the commutator, thus enhancing noise reduction and contact reliability.
Implementation Method 1
a deformable portion in contact with the brush and the wall surface
Implementation Method 2
vibration of the brush may cause the damper members to move toward a rotation shaft
Data Source
AI summary
A motor according to an embodiment includes a commutator provided to a rotation shaft, a brush in contact with the commutator, a bracket having a wall surface opposing the brush, and a deformable portion in contact with the brush and the wall surface. The bracket includes a protrusion provided on the commutator side with respect to the deformable portion. The protrusion protrudes from the wall surface toward the brush.