Preloaded Reduction Gear Backlash Elimination
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Solution Overview
Problem
The existing reduction gear systems require complex constructions and increased production costs to reduce backlash, which complicates the working properties due to the need for fastening plates and Shepin rings to manage interference.
Innovation Solution
A reduction gear system that preloads internal and external gears from the outer circumferences of the first and second reduction gears, with a configuration that includes fixed support elements and bearings strategically placed to reduce backlash without the need for additional bearings between the first internal gear and its support element, simplifying the design and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fastening plates and Shepin rings are used to reduce backlash, then backlash is reduced, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the fastening plate and Shepin ring from the system by redesigning the support element to directly integrate the backlash reduction function. The support element is modified to include a pressing portion that directly presses the external gear, removing the need for separate fastening components while maintaining backlash control.
Solution Approach 2:
The patent merges the functions of the support element and the backlash reduction mechanism into a single integrated component. The support element now includes an integrated pressing portion that performs both structural support and gear pressing functions, eliminating the need for separate fastening plates and Shepin rings.
2Manufacturing precision
If fastening plates and Shepin rings are used to reduce backlash, then backlash is reduced, but production costs increase
Solution Approach 1:
The patent removes the fastening plate and Shepin ring components from the assembly, reducing the number of parts that need to be manufactured, inventoried, and assembled. This extraction of unnecessary components directly reduces production costs while maintaining the backlash reduction function through the integrated pressing portion.
Solution Approach 2:
By combining the support and pressing functions into a single support element, the patent reduces the total component count and assembly steps. This merging of functions simplifies manufacturing processes and reduces production costs while achieving the same backlash reduction effect.
3Manufacturing precision
If fastening plates and Shepin rings are used to reduce backlash, then backlash is reduced, but working properties are worsened
Solution Approach 1:
The patent extracts the interfering fastening plate and Shepin ring components that complicated the working properties. By removing these components and using a simplified integrated support element, the patent improves working properties such as rotational smoothness and operational reliability while maintaining backlash control.
Solution Approach 2:
The integration of the pressing function into the support element creates a more streamlined mechanism with fewer moving parts and less interference. This merging improves working properties by reducing mechanical complexity and enhancing the smoothness of operation during rotation.
Data Source
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AI summary
Backlash can be removed by simply preloading a first reduction gear and a second reduction gear. Consequently, a reduction gear system from which backlash is removed can be provided simply and inexpensively. There is provided a reduction gear system comprising a first reduction gear having a first internal gear, a first external gear which meshes with the first internal gear, a first crank element which engages with the first external gear so as to cause the first external gear to perform an eccentric motion and a first support element for supporting the first crank element rotatably and a second reduction gear having a second internal gear, a second external gear which meshes with the second internal gear, a second crank element which engages with the second external gear so as to cause the second external gear to perform an eccentric motion and a second support element for supporting the second crank element rotatably, wherein the first crank element and the second crank element are connected to each other, wherein the first support element and the second support element or the first internal gear and the second internal gear are fixed to each other, and wherein the first internal gear and the second internal gear are fixed to each other under a state that the first internal gear and the second internal gear are rotated in opposite directions relative to each other.