Combined Tooth Surface Cycloidal Transmission for Higher Power Density
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Solution Overview
Problem
Existing cycloidal movable tooth transmission mechanisms suffer from low power density, large size, and limited space utilization due to undercutting issues, leading to inefficiencies and market competitiveness challenges.
Innovation Solution
A cycloidal movable tooth transmission mechanism with a combined tooth surface, featuring a single-stage or multi-stage transmission units with a combined tooth surface cycloid race, allowing for efficient meshing of three different tooth surfaces to form a complete cycloid, enhancing power transmission and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cycloidal movable tooth transmission is designed to avoid undercutting, then the tooth surface integrity is maintained, but the power density decreases and size increases
Solution Approach 1:
The tooth surface is segmented into multiple discrete surfaces, each responsible for a specific portion of the cycloid meshing curve. This allows each surface to be optimized independently, avoiding undercutting while maximizing the utilization of the complete cycloid path for power transmission.
Solution Approach 2:
The invention transitions from traditional two-dimensional tooth profiles to three-dimensional combined tooth surfaces with discrete facets. This dimensional enhancement allows the tooth to engage the raceway along the complete cycloid path without undercutting, thereby increasing power density while maintaining surface integrity.
2Reliability
If the movable tooth race is designed to be free of undercuts, then the transmission mechanism is reliable, but space utilization becomes insufficient and size increases
Solution Approach 1:
Different portions of the tooth surface have different geometric qualities and functions. The discrete tooth surfaces are locally optimized to match specific sections of the cycloid path, eliminating undercutting in critical areas while maximizing space utilization in other regions.
Solution Approach 2:
The tooth structure employs a composite geometry combining multiple discrete surfaces rather than a uniform traditional profile. This composite approach allows the tooth to achieve both reliability (no undercutting) and compactness (improved space utilization) by strategically placing different surface types in different locations.
3Loss of energy
If friction is reduced in the transmission mechanism, then efficiency improves, but the complexity of the tooth surface design increases
Solution Approach 1:
The discrete tooth surfaces are pre-configured with specific orientations and positions that are optimized beforehand to minimize friction during meshing. This preliminary design ensures that the contact between tooth and raceway occurs at optimal angles, reducing friction loss without requiring complex real-time adjustments.
Data Source
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AI summary
The present disclosure proposes a cycloidal movable tooth transmission mechanism with a combined tooth surface. The cycloidal movable tooth transmission mechanism with a combined tooth surface is based on a combined tooth surface cycloid race and takes a combined tooth surface cycloidal movable tooth meshing pair as a core. The cycloidal movable tooth transmission mechanism with a combined tooth surface includes a single-stage cycloidal movable tooth transmission unit with a combined tooth surface, a single-stage closely-packed cycloidal movable tooth transmission unit with a combined tooth surface, a two-tooth-difference closely-packed cycloidal movable tooth transmission unit with a combined tooth surface, and a double-output two-tooth-difference cycloidal movable tooth transmission unit with a combined tooth surface. These transmission units can be connected in series, in parallel, or in series and parallel to form a more complex multi-stage transmission unit, which can be used in a reducer in a variety of forms. A tooth surface of the combined tooth surface cycloid race is composed of three different tooth surfaces that are discretized. A union of meshing curves of all the tooth surfaces forms a complete cycloid, either a hypocycloid or an epicycloid.