Eccentric Shaft Centrifugal Saddle Weight Assembly
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Solution Overview
Problem
Current variable transmission mechanisms lack precision and available transmission positions, especially in high horsepower applications, and struggle with weight assemblies returning to home positions efficiently.
Innovation Solution
An easily switchable automatic transmission eccentric shaft design featuring an input shaft, centrifugal saddle, weight assembly, and balance weights with a limiting structure comprising retention members and an elastic element, which controls preciseness, increases transmission positions, and facilitates weight assemblies' return to home positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional variable transmission mechanisms are used, then the structure is relatively simple, but the transmission precision and available transmission positions are insufficient
Solution Approach 1:
The weight assembly is divided into multiple independent weights, each capable of moving along guide rails. This segmentation allows each weight to independently control a specific transmission position, thereby increasing the number of available transmission positions and improving transmission precision without requiring a completely complex new structure
Solution Approach 2:
The patent introduces movable weights that can dynamically adjust their positions along guide rails, and a movable centrifugal saddle that can shift between different flat sections of the input shaft. This dynamic capability enables continuous variable transmission with multiple discrete positions, improving transmission precision while maintaining operational flexibility
2Ease of operation
If conventional transmission mechanisms are used, then the basic transmission function is achieved, but the weight assemblies cannot return to home positions efficiently
Solution Approach 1:
The patent introduces balance weights that are positioned to counterbalance the centrifugal weights. When the centrifugal weights need to return to their home positions, the balance weights provide the necessary counteracting force to facilitate this return motion, significantly improving the efficiency and speed of weight assembly return without requiring additional complex actuation mechanisms
Solution Approach 2:
The balance weights automatically perform the function of returning the centrifugal weights to their home positions through their own gravitational and centrifugal forces. The system uses its own components (balance weights) to service the return function, eliminating the need for separate return mechanisms and reducing the time required for weight assembly reset
3Manufacturing precision
If conventional eccentric shaft designs are used, then the basic variable transmission is achieved, but the precision and suitability for high horsepower applications are insufficient
Solution Approach 1:
The input shaft is designed with multiple flat sections instead of a traditional circular cross-section. This segmentation allows the centrifugal saddle to lock onto specific flat sections at precise angular positions, enabling accurate control of transmission ratios even under high horsepower conditions. The segmented design provides multiple stable locking positions that maintain precision under high power loads
Solution Approach 2:
The patent introduces curved guide rails along which the weights move, and a centrifugal saddle with curved engagement surfaces that mate with the flat sections of the input shaft. These curved elements provide smooth transitions between transmission positions and ensure stable engagement under high horsepower conditions, improving both precision and power capability
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 solution enhances the precision and availability of transmission positions while ensuring smooth operation and efficient return to home positions, making it suitable for high horsepower applications.
Implementation Method 1
An elastic body is arranged between the centrifugal saddle and the input shaft
Implementation Method 2
an elastic element arranged between the retention members
Implementation Method 3
The balance weight is arranged at one side of the weight assembly and is coupled to the weight assembly
Data Source
AI summary
An easily switchable automatic transmission eccentric shaft includes an input shaft over which a movable centrifugal saddle is fit. An elastic body is arranged between the centrifugal saddle and the input shaft. The centrifugal saddle is provided at one side thereof with an openable weight assembly, which selectively moves the centrifugal saddle with respect to the input shaft. A balance weight is coupled to one side of the weight assembly. The balance weight forms a limiting structure that includes two retention members and an elastic element between the retention members. The limiting structure helps controlling preciseness of variable transmission, helps increasing available transmission positions, facilitates the weight assemblies returning back to home positions, and is suitable for high horsepower applications.