Four-Disc Cycloid Speed Reducer for High-Load Dynamic Balance
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Solution Overview
Problem
Conventional cycloid speed reducers face issues with high volume, weight, and cost, as well as low rigidity and short lifespan due to deformation and teeth difference friction, while also struggling to maintain dynamic equilibrium under high-load conditions.
Innovation Solution
A cycloid speed reducer design featuring an eccentric device with two roller assemblies and four cycloid disc assemblies, where each disc is connected with rollers to distribute load evenly and enhance structural strength, eliminating the need for additional weight compensation for dynamic equilibrium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional cycloid speed reducers use traditional designs with fewer cycloid discs, then the structure is simpler, but the rigidity is low and the lifespan is short due to deformation and teeth difference friction
Solution Approach 1:
The speed reducer is divided into two independent rotating disc assemblies, each with two cycloid discs, totaling four cycloid discs. This segmentation distributes the mechanical load across multiple discs, reducing deformation and friction on individual components while maintaining structural integrity through the modular assembly design
2Productivity
If conventional cycloid speed reducers use single-stage reduction, then the device is more compact, but the reduction ratio capability is limited
Solution Approach 1:
Two rotating disc assemblies are merged into a single integrated speed reducer unit, sharing common components such as the eccentric device and housing. This combination achieves high reduction ratio capability through dual-stage cycloid mechanism while keeping the device volume compact by eliminating redundant components
3Reliability
If conventional cycloid speed reducers use metallic gear materials, then the strength and durability are high, but the volume and weight are large and the cost is high
Solution Approach 1:
The patent employs composite material construction for the cycloid discs and roller assemblies, combining materials with high strength-to-weight ratios. This allows the components to maintain high durability and load-bearing capacity while significantly reducing the overall weight compared to traditional all-metallic gear systems
4Stability of the object's composition
If conventional cycloid speed reducers use eccentric mechanisms without dynamic balance, then the structure is simpler, but vibration and instability occur under high-load conditions
Solution Approach 1:
The two rotating disc assemblies are positioned and configured to act as counterweights to each other, creating dynamic balance through their opposing rotational masses. This counterbalancing effect eliminates vibration and instability under high-load conditions without requiring additional weight compensation mechanisms
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
The design achieves high rigidity and dynamic equilibrium, allowing the cycloid speed reducer to handle high loads effectively without additional weight compensation, reducing the risk of damage and vibration, and improving operational stability and lifespan.
Implementation Method 1
The eccentric assembly is eccentrically rotated relative to an axle center of the rotating shaft
Data Source
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AI summary
A cycloid speed reducer (1, 1') includes two rotating disc assemblies (5, 6, 5', 6'). Each rotating disc assembly (5, 6, 5', 6') includes two cycloid discs (50, 51, 60, 61, 50', 51', 60', 61'). In other words, the cycloid speed reducer (1, 1') has four cycloid discs (50, 51, 60, 61, 50', 51', 60', 61') to be contacted with the corresponding rollers (31, 41, 31', 41'). Consequently, the load withstood by each cycloid disc (50, 51, 60, 61, 50', 51', 60', 61') is reduced. Since the cycloid speed reducer (1, 1') has stronger structural strength, the cycloid speed reducer (1, 1') can be applied to the high-load circumstance. Moreover, an eccentric assembly (21, 21') of the eccentric device (2, 2') includes plural eccentric cylinders (22, 23, 24, 25, 22', 23', 24', 25'). The eccentric cylinders (22, 23, 24, 25, 22', 23', 24', 25') are installed within the axle holes (57, 58, 65, 66, 56', 57', 65', 66') of the corresponding cycloid discs (50, 51, 60, 61, 50', 51', 60', 61'). Due to the plural eccentric cylinders (22, 23, 24, 25, 22', 23', 24', 25'), the eccentric direction of two cycloid discs (50, 51, 60, 61, 50', 51', 60', 61') is opposite to the eccentric direction of the other two cycloid discs (50, 51, 60, 61, 50', 51', 60', 61'). Consequently, it is not necessary to install an additional weight compensation device in the cycloid speed reducer (1, 1') to compensate the dynamic equilibrium.