Cycloid Gear Assembly With Alternating Pin Contact for Shock Resistance
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Solution Overview
Problem
Conventional cycloid and strain-wave gear assemblies face challenges in miniaturization and shock resistance, making them unsuitable for applications requiring high precision and durability in compact sizes.
Innovation Solution
The gear assembly incorporates pins that bridge adjacent areas between transfer members, engaging them unequally during operation. This unequal engagement, combined with the use of roller bearings suited for miniaturization, enhances miniaturizability and shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional cycloid and strain-wave gear assemblies are used, then gear functionality is achieved, but miniaturization and shock resistance are insufficient
Solution Approach 1:
The gear assembly is segmented into multiple pins distributed around the cycloid path, each pin independently engaging the cycloid gear. This segmentation allows the assembly to be miniaturized while maintaining shock resistance through distributed load bearing across multiple contact points
Solution Approach 2:
The gear assembly combines different material properties and structural elements - pins made from shock-resistant materials, cycloid gear teeth optimized for contact stress, and composite structural design that integrates multiple functions into unified components, achieving both miniaturization and enhanced shock resistance
2Volume of moving object
If gear assembly size is reduced for miniaturization, then compactness is improved, but shock resistance deteriorates
Solution Approach 1:
The invention transitions from traditional two-dimensional gear contact to three-dimensional pin engagement along the cycloid path. Multiple pins engage the cycloid gear at different angular positions simultaneously, creating a three-dimensional load distribution that maintains shock resistance while reducing overall assembly size
Solution Approach 2:
The pins are strategically positioned and dimensioned to counterbalance shock loads from multiple directions. The distributed pin arrangement creates counteracting force vectors that neutralize impact stresses, enabling miniaturized design without sacrificing shock resistance
Data Source
AI summary
A gear assembly in accordance with at least some embodiments of the present technology includes first and second supports extending circumferentially around an axis in first and second planes, respectively. The gear assembly further includes a first transfer member including first lobes and first troughs circumferentially alternating around the axis in a third plane. The gear assembly also includes a second transfer member including second lobes and second troughs circumferentially alternating around the axis in a fourth plane. The planes intersect the axis with the third and fourth planes between the first and second planes. The gear assembly further includes first and second pins circumferentially interspersed around the axis and extending between the first and second supports. The gear assembly transfers torque at least primarily via contact between the first pins and the first lobes and via contact between the second pins and the second lobes.