Grounding Brush Assembly With Convex Fiber-Retaining Flanks
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Solution Overview
Problem
Conventional grounding brush assemblies for electric motors or machines can damage conductive fibers due to sharp cutting edges, leading to contamination within the motor or machine.
Innovation Solution
A grounding brush assembly with a support having convex surfaces at the free ends of its lateral flanks to reduce the risk of cutting the conductive fibers, combined with a mounting plate that axially and radially retains the brush, ensuring secure contact without sharp edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional grounding brush assemblies use supports with sharp edges to retain conductive fibers, then the brush structure is simple and easy to manufacture, but the conductive fibers may be cut causing contamination inside the motor or machine
Solution Approach 1:
The support features convex surfaces at the free ends of its lateral flanks instead of sharp edges. These convex surfaces have a curved geometry that prevents cutting of the conductive fibers while maintaining the retaining function, thus resolving the contradiction between reliability and device complexity
Solution Approach 2:
The support structure applies different geometric properties to different regions: the mounting portion has a standard configuration for structural integrity, while the free ends of lateral flanks have convex surfaces specifically designed to protect conductive fibers. This localized modification addresses the fiber protection issue without unnecessarily complicating the entire support structure
2Reliability
If the support lateral flanks are designed with convex surfaces to protect conductive fibers, then fiber damage is prevented, but the manufacturing complexity increases
Solution Approach 1:
The convex surfaces can be formed using standard manufacturing processes such as forging, casting, or machining curved surfaces. These processes are well-established in the industry and do not require specialized equipment, thus the manufacturing complexity increase is minimal while achieving the protective function
Solution Approach 2:
The invention changes the geometric parameter of the lateral flank ends from sharp edges to convex surfaces with specific curvature radii. This parameter change protects the conductive fibers while being achievable through conventional manufacturing methods with appropriate tooling
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 design effectively prevents damage to conductive fibers, reducing the risk of contamination and maintaining effective electrical grounding by eliminating sharp cutting edges, thus ensuring reliable operation of the electric motor or machine.
Implementation Method 1
By virtue of the conductivity of the fibers, the brush is kept at the same electrical potential as the housing of the electric motor
Implementation Method 2
each lateral flank of the support is provided, at its free end, with a convex surface in contact with the conductive fibers. With the support designed in this way, the risk of the support cutting the conductive fibers is reduced due to the convex surface
Data Source
AI summary
A grounding brush includes a plurality of conductive fibers and a support inside which the conductive fibers are mounted. The support includes a mounting portion and two lateral flanks extending from the mounting portion and axially gripping the conductive fibers. Each lateral flank of the support has a free end with a convex surface in contact with the conductive fibers.