Sleeve Speed Reducer Eliminates Output Shaft
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Solution Overview
Problem
Conventional speed reducers require an output shaft, have complex structures, and are thick, making them costly and inefficient in increasing speed reduction ratios without increasing volume.
Innovation Solution
A speed reducer design that eliminates the need for an output shaft by using a sleeve-shaped rotation member with driving assemblies and bearing sets, allowing for thinner construction and reduced component count, while achieving speed reduction through eccentric operation of rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an output shaft is used in conventional speed reducers, then the structure is complete and functional, but the structure becomes complicated and the total thickness increases
Solution Approach 1:
The patent removes the output shaft from the conventional speed reducer structure. The sleeve-shaped rotation member directly transmits rotational motion to the driven device without requiring a separate output shaft, thereby simplifying the structure and reducing total thickness while maintaining functional completeness
Solution Approach 2:
The patent combines the functions of the output shaft and the sleeve-shaped rotation member into a single integrated structure. The sleeve-shaped rotation member serves both as the rotating component and the transmission element, eliminating the need for separate output shaft and reducing structural complexity
2Productivity
If the volume is increased to achieve higher speed reduction ratios in conventional speed reducers, then the speed reduction ratio increases, but the cost increases
Solution Approach 1:
The patent transitions from a single-dimension speed reduction approach to a multi-dimensional solution by arranging multiple driving assemblies (at least two) that operate simultaneously on the sleeve-shaped rotation member. This parallel arrangement achieves higher speed reduction ratios without proportionally increasing volume, as the assemblies share the same spatial envelope rather than requiring sequential or radial expansion
Solution Approach 2:
The patent employs a compact nested arrangement where multiple driving assemblies are positioned around the sleeve-shaped rotation member in a circular pattern. The inner rollers are nested within the sleeve, and the driving assemblies are arranged to engage with these inner rollers, creating a space-efficient configuration that maximizes speed reduction capability within a limited volume
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
This design simplifies the structure, reduces costs, and achieves higher speed reduction ratios without increasing volume, meeting market demands for thinner and more efficient speed reduction solutions.
Implementation Method 1
The first bearing set covers one end of the first rod section which is opposite to the second rod section, the first bearing set is press-fit in the corresponding rear pivoting hole, the second bearing set has a first outer-roller bearing, a second outer-roller bearing, and a third outer-roller bearing
Implementation Method 2
each driving assembly and each inner roller of the sleeve-shaped rotation member are eccentrically operated; a plurality of outer rollers is axially arranged at a peripheral of each wheel and operates with each inner roller of the sleeve-shaped rotation member
Data Source
AI summary
A speed reducer comprises a sleeve-shaped rotation member, a rear carrier, a front carrier, three driving assemblies, a third bearing set, a fourth bearing set, and three wheels. When a shaft of a motor inserts into the front central through hole, each axial hole of each wheel, and the rear central through hole and then drives each driving assembly to rotate, the first bearing set and the second bearing set both operate to an inner peripheral of each corresponding through hole of each wheel and the outer rollers of each wheel drive the inner rollers of the sleeve-shaped rotation member due to the eccentric arrangement of the first rod section and the second rod section of the eccentric rod so as to drive the sleeve-shaped rotation member to rotate and then achieve the effect of reducing speed.