Crown Wheel Gear With Axially Adjustable Pinion Backlash
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Solution Overview
Problem
Existing crown wheel gears require high installation and design efforts to adjust the pivoting flank play between the pinion and the crown wheel, often necessitating the displacement of the crown wheel shaft and other components, which can be unfavorable and complex.
Innovation Solution
A crown wheel gear design where the pinion is displaceable relative to the crown wheel, parallel to the crown wheel shaft axis, allowing for adjustment of the pivoting flank play without displacing the crown wheel shaft or other components, thereby simplifying the installation and design process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the crown wheel is displaced axially to adjust the pivoting flank play, then the pivoting flank play can be adjusted, but the installation effort and design complexity increase significantly
Solution Approach 1:
Instead of displacing the crown wheel axially to adjust pivoting flank play, the patent inverts the approach by making the pinion displaceable axially relative to the crown wheel. This allows adjustment of the pivoting flank play through pinion displacement rather than crown wheel displacement, thereby avoiding the need to redesign the crown wheel shaft guidance and sealing points while still achieving the required play adjustment.
2Manufacturing precision
If the crown wheel shaft is displaced to adjust the pivoting flank play, then the pivoting flank play can be adjusted, but the design effort and complexity increase
Solution Approach 1:
The patent applies inversion by making the pinion the displaceable component instead of the crown wheel shaft. The pinion is designed with axial displacement capability through a displaceable pinion shaft, allowing pivoting flank play adjustment without displacing the crown wheel shaft or its associated components, thus avoiding additional design complexity.
Solution Approach 2:
The patent segments the displacement function from the crown wheel shaft to the pinion shaft. By making the pinion shaft displaceable independently while keeping the crown wheel shaft fixed, the system achieves play adjustment without affecting the crown wheel shaft guidance and sealing point design.
3Manufacturing precision
If shim rings are used to adjust the pivoting flank play, then the pivoting flank play can be adjusted, but the installation effort increases
Solution Approach 1:
Instead of using shim rings under the crown wheel to achieve axial displacement for play adjustment, the patent inverts the approach by making the pinion shaft itself displaceable. This eliminates the need for shim rings and their associated installation complexity, as the pinion can be directly positioned axially relative to the crown wheel.
Data Source
AI summary
The invention relates to a crown wheel gear, having a housing, a pinion shaft rotatably mounted relative to the housing, a pinion connected to the pinion shaft, a crown wheel shaft rotatably mounted relative to the housing, and a crown wheel connected to the crown wheel shaft, wherein the pinion and the crown wheel are in toothed engagement with one another. In this case, the crown wheel and the crown wheel shaft are arranged rotatably but fixed in position relative to the housing. The pinion is displaceable relative to the crown wheel in order to adjust a pivoting flank play between the crown wheel and the pinion.