Brush Mounting Plate with Offset Guiding Plates for Universal Motors
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Solution Overview
Problem
Existing brush mounting plates for universal motors are limited in their ability to accommodate different commutator diameters, requiring multiple components and complex assembly steps due to the specific design of U-shaped brush guiding plates, which are often suited only for particular diameters.
Innovation Solution
A brush mounting plate with radially offset, rotationally symmetrical guiding plate feet that extend through mounting holes, allowing for adjustable positioning by 180° to accommodate different commutator diameters using a single set of components, and featuring bottom plates with adapted holes for guiding carbon brushes with minimal wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If U-shaped brush guiding plates are designed with specific dimensions for a particular commutator diameter, then the guidance precision for that diameter is improved, but the adaptability to different commutator diameters deteriorates
Solution Approach 1:
The brush guiding plate is designed with a rotatable mounting mechanism that allows the guide direction to be changed by 180 degrees. This dynamic reconfiguration enables the same guiding plate to accommodate different commutator diameters by altering its orientation, thus resolving the contradiction between precision for a specific diameter and adaptability to varying diameters.
Solution Approach 2:
The invention changes the operational parameter of the brush guiding plate by introducing asymmetrical spacing between the guiding plate feet and the end surfaces. This parameter change allows the guiding plate to function correctly with different commutator diameters when mounted in different orientations, maintaining guidance precision across multiple applications.
2Adaptability or versatility
If multiple different components are used to accommodate different commutator diameters, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The brush guiding plate is designed as a universal component that can serve multiple functions by being mounted in different orientations. The same guiding plate can accommodate different commutator diameters when rotated 180 degrees, eliminating the need for multiple specialized components and reducing overall device complexity while maintaining adaptability.
Solution Approach 2:
The guiding plate feet are positioned asymmetrical to the end surfaces of the brush guiding plate, with different distances from respective adjacent end surfaces. This asymmetry enables the guiding plate to be mounted in two different orientations (0° and 180°), allowing a single component to adapt to different commutator diameters without requiring multiple variants.
3Stability of the object's composition
If screws or rivets are used to secure the brush guiding plates, then the structural stability is improved, but the assembly complexity increases
Solution Approach 1:
The mounting holes are formed integrally as part of the brush mounting plate structure, combining the mounting function with the existing plate geometry. This eliminates the need for separate mounting components and reduces assembly steps while maintaining structural stability through the unified design.
Data Source
AI summary
A brush mounting plate for a universal motor includes U-shaped brush guiding plates (4) for radially guiding carbon brushes (3) and having radially offset guiding plate feet (5) which extend through associated mounting holes (6) formed in the brush mounting plate (1), with at least two guiding plate feet (5) being spaced at different distances from respective adjacent end surfaces (11a, 11b) of an associated brush guiding plate (4).