Transmission Axial Support via Thrust Washer
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Solution Overview
Problem
Existing transmissions with radially movable toothed segments experience high wear due to axial support issues, leading to reduced service life and increased frictional losses.
Innovation Solution
The transmission incorporates thrust washers arranged for conjoint rotation with the tooth holder, providing axial support to swivel segments, and rolling elements with separate flanges for optimal bearing, reducing friction and wear by ensuring continuous contact and minimizing edge sliding during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If axial support is provided by a thrust washer moving with the drive element, then axial support for swivel segments is achieved, but frictional losses and wear increase significantly
Solution Approach 1:
The patent introduces an intermediary element (thrust washer fixed to tooth holder) between the swivel segment and the moving components. This thrust washer remains stationary relative to the tooth holder while providing axial support, mediating the interaction to reduce friction and wear compared to direct contact with moving parts.
2Reliability
If axial support is provided by a thrust washer moving with the drive element, then axial support for swivel segments is achieved, but service life decreases due to high wear
Solution Approach 1:
The stationary thrust washer acts as a mediator that provides durable axial support without undergoing wear from relative motion. By fixing the thrust washer to the tooth holder rather than allowing it to move with the drive element, the system achieves both axial support and extended service life.
3Ease of operation
If swivel segments are arranged between teeth and drive element, then defined movement of teeth is enabled, but axial support becomes critical and complex
Solution Approach 1:
The thrust washer serves as a simple intermediary component that provides axial support without adding complexity. By placing this single element in the tooth holder, the patent enables defined tooth movement through swivel segments while maintaining a straightforward support structure.
Data Source
AI summary
Disclosed herein is a transmission having a tooth holder for holding teeth of a toothed ring, said teeth being arranged around an axis of rotation of the transmission, wherein the teeth are arranged in the tooth holder in such a way as to be movable and to be guided in a radial direction. The transmission furthermore has a drive element, which is rotatable about the axis of rotation, for driving the teeth in a radial direction, wherein the drive element has a cam contour with lobes in a radial direction. Swivel segments are arranged between the teeth and the drive element. A thrust washer is arranged in the tooth holder, at least on one side in an axial direction of the swivel segments. A method for producing a transmission according to the embodiments described herein is furthermore described.