Slip Ring Brush Holder With Pivot Lever
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Solution Overview
Problem
Existing slipring brush holders face challenges in maintaining constant pressure over the lifetime of the brush, leading to changing electrical contact characteristics due to wear, and often require large designs to achieve this stability.
Innovation Solution
A compact brush holder design featuring a base, lever, and brush mount with a pivot system and spring configuration that maintains constant pressure through adjustable pivot axes and spring forces, allowing for tilting and alignment with sliding tracks while preventing rotation, thus compensating for wear and size constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded lever with long spring and long lever is used to achieve constant pressure, then the pressure stability is improved, but the brush holder size increases
Solution Approach 1:
The brush mount is made pivotable about a pivot axis, allowing it to dynamically adjust its position as the brush wears. This dynamic adjustment mechanism replaces the need for long levers and springs, maintaining constant pressure while keeping the structure compact.
Solution Approach 2:
The invention changes the geometric parameters of the lever arm and pivot axis position to achieve the desired mechanical advantage. By optimizing these parameters, constant pressure is maintained without requiring excessive lever length, thus avoiding increased brush holder size.
2Adaptability or versatility
If a pivotable ball mounting allowing tilting in two axes and rotation is used, then the adaptability to sliding tracks is improved, but the device complexity increases
Solution Approach 1:
The brush mount is designed to be pivotable about a single pivot axis rather than allowing free rotation in multiple axes. This asymmetric constraint provides sufficient alignment capability while significantly reducing the complexity of the mounting mechanism.
Solution Approach 2:
The mounting mechanism is segmented into distinct functional elements: the pivot axis for alignment, the lever arm for force transmission, and the brush mount for brush holding. This segmentation allows each element to perform its specific function efficiently without the complexity of a fully articulated ball mounting.
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 provides a compact and stable brush holder that maintains constant pressure over the brush's lifetime, ensuring consistent electrical contact and reducing wear-related issues, while allowing for efficient torque compensation and alignment with varying sliding track surfaces.
Implementation Method 1
a spring (230), which is connected between the base and the lever such that the brush mount pivot increases its distance to the base under the force of the spring
Implementation Method 2
a lever (220), which has a first side and a second side, wherein the second side is connected to the base by a base pivot (221) having a base pivot axis (222)
Data Source
AI summary
A brush holder for slipring brushes comprises a brush mount held by a lever at a base. The lever is connected by a base pivot to the base and is pivotable in a plane orthogonal to a brush mount pivot axis and/or to a slipring rotation axis. A spring is provided between the base and the lever. The brush mount is connected to the lever by a brush mount pivot pivotable in said plane. The brush mount holds a first brush and a second brush wherein the brush mount pivot is between the first brush and the second brush.