Tool-Free Brush Terminal Installation via Spring Compression
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Solution Overview
Problem
Conventional brush holders for dynamoelectric machines require the use of tools for installation and removal, posing safety hazards and increasing downtime due to their weight and unwieldiness, especially when handling energized machines.
Innovation Solution
A brush holder apparatus with a stationary support member and a brush holder that allows for tool-free installation and removal, featuring a conductive bar for electrical connectivity and a L-shaped brush terminal that can be manually engaged or disengaged from a terminal compression plate without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tools are used for installation and removal of brush terminal, then secure connection is achieved, but safety hazards increase and downtime increases
Solution Approach 1:
The patent replaces the traditional mechanical tool-based fastening system with a spring-loaded compression mechanism. The spring applies continuous radial force to press the brush terminal against the collector, eliminating the need for tools during installation and removal while maintaining secure electrical connection. This substitution of mechanical fastening with elastic compression resolves the contradiction by removing tool requirements (reducing safety hazards) while preserving connection reliability through the spring's constant contact force.
2Manufacturing precision
If tools are used for brush terminal installation, then proper mounting is ensured, but operational downtime increases
Solution Approach 1:
The spring-loaded brush terminal design enables self-service installation and removal without requiring external tools or specialized equipment. The operator can manually insert or remove the brush terminal, and the spring automatically provides the necessary mounting force and positional alignment. This self-servicing mechanism ensures proper mounting through the spring's inherent elastic properties while dramatically reducing operational downtime by eliminating tool-based procedures.
3Stability of the object's composition
If conventional brush holder design is used, then structural stability is maintained, but ease of operation deteriorates
Solution Approach 1:
The patent introduces dynamic elements to the traditionally static brush holder design. The spring-loaded mechanism allows the brush terminal to dynamically adjust its position and apply variable force based on operational conditions. The spring can compress and expand to accommodate wear, thermal expansion, and misalignment, maintaining structural stability while enabling easy manual operation for installation and removal. This dynamic approach replaces rigid, tool-dependent fastening with flexible, hand-operable elastic compression.
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
Enables safe and efficient manual replacement of brushes, reducing downtime and minimizing the risk of accidents by eliminating the need for tools, thus enhancing operational safety and convenience.
Implementation Method 1
A brush spring is configured to be clipped on the brush holder. The brush spring is configured to press a brush against a collector of a dynamoelectric machine.
Implementation Method 2
The stationary support member has a conductive bar configured to pass through a portion of a main body of the stationary support member. The conductive bar is configured to provide electrical conductivity with a collector mount and the fork electrical connector.
Data Source
AI summary
A brush holder apparatus has a stationary support member having two opposing grooves, a fork electrical connector, and a conductive bar passing through a main body of the stationary support member. A brush holder is releasably affixed to the stationary support member, and has two rails that slide along the grooves. The brush holder's knife electrical connector mates with the fork electrical connector. A brush spring is clipped on the brush holder, and presses a brush against a collector. A brush lead connects the brush to a brush terminal. The brush terminal has a generally L-shaped body with a lower part thereof retained under a terminal compression plate, and an upper part thereof located on a front side of the terminal compression plate. The brush terminal is removed from or installed into a front side of the brush holder, and by hand or without the use of any tools.