Clutch Self-Lock Mechanism for Faster Transfer Response
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Solution Overview
Problem
Clutch driving devices with a self-lock function face challenges in achieving both increased responsiveness of the transfer mechanism and maintaining the self-lock function, as enhancing responsiveness typically leads to degradation of the self-lock function due to the need to reduce friction force.
Innovation Solution
The solution involves separating the friction mechanism for achieving self-lock from the transfer mechanism, allowing only rotational force transfer, with a movable rotation transfer portion to prevent axial force transfer, thereby reducing friction force variations and enhancing responsiveness while maintaining self-lock functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the friction force of the friction device is increased to maintain the self-lock function, then the self-lock function is maintained, but responsiveness of the transfer mechanism degrades
Solution Approach 1:
The invention divides the original integrated friction device into two separate functional components: a friction mechanism (including friction plate and spring plate) and a rotation transfer mechanism (including worm gear pair). This segmentation allows the friction mechanism to maintain self-lock function through friction force while the rotation transfer mechanism achieves high responsiveness through efficient gear engagement, resolving the contradiction between reliability and speed.
2Reliability
If the elastic restoring force of the spring plate is increased to maintain self-lock, then self-lock function is improved, but responsiveness of transfer mechanism degrades
Solution Approach 1:
The spring plate is separated from the rotation transfer mechanism and dedicated exclusively to the friction mechanism. This allows the spring plate to be optimized for generating sufficient friction force for self-lock without interfering with the responsiveness of the rotation transfer mechanism. The spring plate's elastic restoring force can be independently tuned to maintain self-lock while the rotation transfer mechanism operates with high responsiveness.
3Speed
If the configuration of the worm is changed to increase transfer efficiency, then responsiveness of transfer mechanism is improved, but self-lock function degrades
Solution Approach 1:
The invention separates the worm gear pair (rotation transfer mechanism) from the friction device (friction mechanism). This allows the worm gear pair to be optimized for high transfer efficiency and responsiveness without compromising self-lock function. The friction mechanism independently provides the necessary friction force to maintain self-lock, while the worm gear pair focuses solely on efficient rotation transfer.
Solution Approach 2:
The self-lock function is extracted from the rotation transfer mechanism and assigned to a dedicated friction mechanism. This extraction allows the rotation transfer mechanism to be optimized for responsiveness and efficiency without the constraint of maintaining self-lock, while the friction mechanism independently ensures self-lock functionality.
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
This configuration increases the responsiveness of the transfer mechanism while maintaining the self-lock function, allowing for efficient driving force generation without increasing the clutch driving device's output size, and enhances assembly precision and compactness.
Implementation Method 1
a friction mechanism that generates a friction force in a direction opposite to the rotation direction of rotation transferred by the transfer mechanism
Implementation Method 2
a spring plate that exerts an elastic restoring force
Data Source
AI summary
A clutch driving device having a self-lock function includes a friction mechanism that generates a friction force in a direction opposite to a rotation direction of rotation transferred by a transfer mechanism that transfers an output of a motor to a clutch. The friction mechanism includes a rotation body that rotates by the force in the rotation direction transferred by the transfer mechanism, a friction plate that generates a friction force by contact with the rotation body, and a spring that biases the friction plate toward the rotation body such that the rotation body and the friction plate are brought into contact with each other. An intermediate shaft of the transfer mechanism includes a rotation transfer portion that rotates together with the rotation body and is movable in the axial direction relative to the rotation body.