Torque Dividing Arrangement for Vehicle Door Locking
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Solution Overview
Problem
Existing locking devices for vehicle doors face challenges in unlocking due to insufficient torque, particularly in overcrowded conditions, dirty guides, or when drives are at the edge of their tolerances, leading to difficulties in applying the required torque to rotate the spindle nut.
Innovation Solution
A torque dividing arrangement is integrated into the door drive system, allowing for adjustable active torque and unlocking force through a locking transmission, which transmits reaction torque to the locking mechanism, enabling enhanced unlocking capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the drive force is used for normal door movement, then the door can be opened and closed, but the torque is insufficient for unlocking under adverse conditions
Solution Approach 1:
The door drive system is segmented into two functional paths: one for normal door movement and another dedicated path for unlocking. The torque dividing arrangement separates the reaction torque to specifically power the locking mechanism, ensuring sufficient unlocking torque independent of the main drive's limitations.
Solution Approach 2:
A torque dividing arrangement acts as an intermediary mechanism that intercepts the reaction torque from the drive and redirects it to the locking mechanism. This mediator ensures that the unlocking function receives adequate torque even when the main drive force is insufficient.
2Reliability
If the spindle nut is rotationally fixed, then the door remains locked in closed position, but it cannot be unlocked when drive torque is insufficient
Solution Approach 1:
The locking mechanism is pre-configured with a dedicated torque transmission path that activates when unlocking is needed. The torque dividing arrangement is预先 set up to redirect reaction torque to the locking mechanism, enabling unlocking without requiring additional manual effort or exceeding drive torque limits.
3Device complexity
If the locking mechanism uses the same drive force as normal movement, then the system is simple, but unlocking fails under adverse conditions
Solution Approach 1:
The reaction torque from the drive serves dual purposes: it powers the door movement during normal operation and simultaneously powers the unlocking mechanism when needed. This multi-functional use of the same torque source maintains system simplicity while ensuring reliable unlocking.
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 provides greater torque for unlocking, ensuring reliable door operation even in challenging conditions, such as overcrowding or when drive torque is insufficient, by allowing adjustable locking and unlocking forces within wide limits.
Implementation Method 1
A torque dividing arrangement is integrated into the door drive system, allowing for adjustable active torque and unlocking force through a locking transmission, which transmits reaction torque to the locking mechanism
Data Source
AI summary
A locking device for a sliding door or a swing and sliding door having a door leaf, the lock device comprising a drive train including at least one motor, a drive transmission and a drive spindle. The locking device also comprises a locking transmission and a torque dividing arrangement.