Suspended Wheel Reducer With Rigid Ring Gears for High Reduction Ratios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gear reducers with high reduction ratios require complex configurations, increased volume, weight, and cost, and often have reliability issues due to the use of flexible inner gear rings, which complicate manufacturing and reduce maintainability.
Innovation Solution
A suspended wheel reducer with rigid inner gear rings and a novel gear transmission configuration that allows for adjustable reduction ratios through dimensional design of planetary gear trains, enabling simple, reliable, and cost-effective operation by integrating the front and rear inner gear rings with the suspended wheel, and using a connecting tie rod for power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional gear reducers use multiple gear sets to achieve high reduction ratios, then the reduction ratio is improved, but the device complexity, volume, weight, and cost increase
Solution Approach 1:
The patent employs nested planetary gear sets where multiple reduction stages are contained within a single compact planetary gear structure. The first and second planetary gear sets are arranged concentrically, with the sun gear, planet gears, and ring gear of one stage nested within or adjacent to the other stage, achieving high reduction ratios without increasing overall device volume or complexity
Solution Approach 2:
The planetary gear structure serves multiple functions simultaneously: it provides both the first and second reduction stages, supports multiple planet gears for load distribution, and maintains compact geometry. The single planetary gear mechanism performs what would traditionally require multiple separate gear sets, reducing overall device complexity while maintaining high reduction capability
2Power
If flexible inner gear rings are used in special type reducers, then the reduction ratio and compactness are improved, but the reliability and manufacturing cost worsen
Solution Approach 1:
The patent replaces the flexible inner gear ring with a conventional rigid ring gear that can be manufactured using standard processes. This rigid ring gear, while potentially requiring slightly more material, provides superior reliability and maintainability compared to flexible rings, and can be produced through conventional manufacturing methods rather than specialized processes
Solution Approach 2:
The invention changes the fundamental parameter of the inner gear ring from flexible to rigid, fundamentally altering the transmission mechanism from a flexible-coupling system to a rigid-gear system. This parameter change enables the use of conventional manufacturing processes and improves reliability while maintaining the high reduction ratio capability through proper gear geometry design
3Power
If flexible inner gear rings are used in special type reducers, then the reduction ratio and compactness are improved, but the manufacturing cost and process complexity increase
Solution Approach 1:
The patent replaces the flexible inner gear ring with a conventional rigid ring gear that can be manufactured using standard gear manufacturing processes such as hobbing or shaping. This eliminates the need for specialized flexible ring manufacturing processes, reducing production complexity and cost while maintaining the ability to achieve high reduction ratios through conventional rigid gear design
Data Source
Figure 1
Figure 2
AI summary
The present invention provides a Suspended Wheel Reducer and a suspended wheel crossing-zero multilevel transmission, both of which comprise a front planetary gear train, a rear planetary gear train and a suspended wheel. With different design for the dimension of the gear wheels contained in the front planetary gear train, the rear planetary gear train and the suspended wheel, it's possible to achieve optional different reduction ratios. The Suspended Wheel Reducer and the suspended wheel crossing-zero multilevel transmission have simple configuration, higher reliability, thus overcoming the drawback in prior art, in which a transmission mechanism for multilevel gear shift mechanism is required to achieve greater reduction ratio, reducing its overall dimensions and cost.