Divided Gear Wheel With Elastic Coupling for Smooth Gear Shifts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic power transmission systems in vehicles suffer from energy loss due to friction during gear shifting and cannot continuously transfer power during gear ratio changes.
Innovation Solution
An automatic power transmission system utilizing divided gear wheels with elastic elements that allow for angular deflection, enabling torque transfer and compensation of differences in angular velocity during gear ratio changes, thereby reducing power losses and facilitating smooth engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional automatic power transmission systems are used for gear shifting, then gear ratio change can be achieved, but energy loss due to friction occurs and continuous power transfer is not possible
Solution Approach 1:
The gear wheel is divided into two independent parts: an inner part that can rotate relative to the outer part. This segmentation allows the inner part to be engaged or disengaged from the shaft independently, enabling smooth gear ratio changes without complete power interruption and reducing frictional losses during shifting.
Solution Approach 2:
The inner part of the divided gear wheel is designed to be angularly deflectable relative to the outer part during engagement. This dynamic capability allows the inner part to accommodate speed differences during gear shifting, enabling continuous power transfer and eliminating frictional losses associated with rigid engagement.
2Reliability
If divided gear wheels with elastic elements are used, then continuous power transfer during gear ratio changes is achieved, but device complexity increases
Solution Approach 1:
The gear wheel is segmented into an inner part and an outer part, with the inner part being angularly deflectable relative to the outer part. This segmentation enables continuous power transfer during gear ratio changes by allowing the inner part to accommodate speed differences, while the overall structure remains relatively simple.
3Productivity
If multiple gears are provided to cover wide torque and speed range, then engine efficiency is improved, but transmission system complexity increases
Solution Approach 1:
The divided gear wheel with the angularly deflectable inner part enables smoother and more efficient gear ratio changes, allowing the engine to operate more consistently within the optimal BSFC area. This dynamic engagement mechanism improves fuel efficiency without requiring an excessive number of gears, as the shifting process itself becomes more efficient.
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 system achieves continuous power transfer during gear ratio changes with reduced frictional losses, enhancing efficiency and smoothness in gear shifting.
Implementation Method 1
The inner part is coupled to the outer part by means of at least sets of two elastic elements, so that the inner part is arranged angularly deflectable with respect to the outer part around the common rotational axis.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The present application relates to a divided gear wheel 100, 200, for an automatic power transmission system 1, to an automatic power transmission system and a method to operate said automatic power transmission system. The automatic power transmission system comprises at least one divided gear wheel that comprises an inner part 130, 230, being engageable with a shaft and an outer part 110, 210, comprising teeth, adapted for torque transmission to another gear wheel. The inner part and the outer part have a common rotational axis, and the inner part is at least partially arranged within the outer part. Further, the inner part is coupled to the outer part by means of at least two elastic elements, so that the inner part is arranged angularly deflectable with respect to the outer part around the common rotational axis. The inner part and the outer part are adapted to rotate with the same angular speed if the elastic elements are fully loaded.