Cycloid Speed Reducer Structure for Compact Sealing and Bearing Control
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Solution Overview
Problem
Current cycloid speed reducers are bulky and not conducive to miniaturization, while harmonic speed reducers have low rigidity and a short lifespan due to teeth difference friction.
Innovation Solution
Integrate the accommodation space for sealing elements into the track ring, omit traditional end covers, use a spacer ring to adjust bearing clearances, and optimize the output plate's shape through mass production molding to reduce size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional end covers are used for sealing, then sealing function is achieved, but overall volume and material cost increase
Solution Approach 1:
The patent integrates the sealing function directly into the track ring structure by forming an integrated sealing cavity within the track ring itself, eliminating the need for separate end covers. This merging of functions reduces the overall volume and material cost while maintaining the sealing reliability.
2Manufacturing precision
If spacer ring is added to adjust bearing clearances, then transmission precision is improved, but device complexity increases
Solution Approach 1:
The spacer ring acts as an intermediary component between the input shaft and bearings, providing a simple yet effective means to adjust and control bearing clearances. This intermediary element enables precise transmission control without significantly increasing overall device complexity.
3Ease of manufacture
If output plate is optimized through mass production molding, then manufacturing cost is reduced, but positioning precision may be affected
Solution Approach 1:
The output plate is pre-formed with integrated positioning features through mass production molding processes. This preliminary action of incorporating positioning structures during molding eliminates the need for subsequent precision machining, thereby reducing manufacturing costs while maintaining positioning precision through design optimization.
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
Achieves miniaturization, saves material and manufacturing costs, and enhances stability and precision by integrating sealing elements into the track ring, using a spacer ring to adjust bearings, and optimizing the output plate's shape.
Implementation Method 1
The roller wheel assembly is sleeved on the cycloidal gear plate and includes a plurality of rollers spatially corresponding to the outer tooth portion of the cycloidal gear plate
Implementation Method 2
The output plate is connected to the cycloidal gear plate through an eccentric transmission shaft, wherein when the input shaft drives the outer tooth portion of the cycloidal gear plate to engage with the corresponding rollers of the roller wheel assembly, the cycloid gear plate is rotated with the eccentric transmission shaft
Data Source
AI summary
A cycloid speed reducer is disclosed. The accommodation space required for the sealing component is integrated into the track ring to save the material costs and significantly reduce the overall volume. Moreover, a spacer ring is placed between the front bearing and the rear bearing, and the thickness of the spacer ring can be used to adjust the clearances of the front bearing and the rear bearing to facilitate the quantitative production and control the yield. On the other hand, the initial shape of the output plate is adjusted through mass production molding, and the thickness next to the protruding structures of the output plate is increased, so that the supporting plane can be milled through a lower-cost lathe processing, and the accuracy of bearing plane can meet the requirements. There is no need to perform full-circle milling on the output plate, and the processing hours are reduced significantly.