Motor Lock Gear Element Translational Overload Protection
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Solution Overview
Problem
Motor locks with self-controlling transmission devices can become stuck in the unlocking position due to drive engine or gearbox device failures, leading to overuse of the gearbox and preventing manual unlocking.
Innovation Solution
Incorporating a gear element with a bearing element that switches between an intervention position with a drive-effective connection and an extraordinary position with a translucent connection, allowing the gear element to pre-tension and automatically switch to prevent overuse and enable manual unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gear mechanism is made self-locking to prevent backward movement, then security and positioning stability are improved, but the ability to manually unlock the lock is lost when the drive motor fails
Solution Approach 1:
The gear element is made dynamically reconfigurable through translational movement between engaged and disengaged positions. The bearing element allows the gear element to shift its position dynamically, enabling the system to transition from a locked self-locking state to an unlocked state where manual operation is possible, thus resolving the contradiction between security and manual unlockability
Solution Approach 2:
The bearing element acts as an intermediary mechanism between the gear element and the housing. It mediates the interaction by allowing controlled translational movement of the gear element, enabling the system to switch between motor-driven operation and manual operation modes without direct mechanical linkage that would prevent either function
2Productivity
If the gear mechanism is continuously engaged to maintain drive connection, then motor operation efficiency is improved, but the risk of overload and damage increases when the locking bolt is stuck
Solution Approach 1:
The gear element's translational freedom allows it to dynamically respond to overload conditions. When excessive force is applied during motor operation with a stuck locking bolt, the gear element can translate to the disengaged position, protecting the gear mechanism from damage while maintaining normal operation efficiency under typical conditions
Solution Approach 2:
The bearing element provides beforehand cushioning by allowing pre-positioning of the gear element in a way that enables it to deflect or translate under excessive load. This preemptive design feature protects the gear mechanism from catastrophic failure by allowing controlled movement that dissipates overload forces before they can cause damage
3Reliability
If the gear element is fixed in position to maintain consistent drive connection, then transmission reliability is improved, but the ability to disengage and protect against overload is lost
Solution Approach 1:
The gear element transitions from a fixed position to a dynamically positionable element that can translate between engaged and disengaged states. This dynamic capability allows the system to maintain consistent drive connection during normal operation while enabling disengagement under overload conditions to prevent damage
Solution Approach 2:
The positional parameter of the gear element is made variable through the bearing element's translational allowance. This parameter change enables the gear element to adjust its position based on operational conditions, maintaining engaged position for reliable power transmission while allowing disengagement to protect against harmful overload forces
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 solution prevents gearbox overuse and allows manual unlocking even if the drive engine or gearbox is defective, ensuring the motor lock can be operated safely and efficiently.
Implementation Method 1
the gear element is preloaded by a preloading element in the direction of its engaged position
Data Source
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AI summary
The present invention relates to a motorized lock with a locking bolt movable between a locking position and an unlocking position, and a drive motor which is coupled to the locking bolt via a drive mechanism comprising a rotatable gear element in the form of a gear that is at least partially toothed. The drive element is mounted on a bearing element so as to be translationally movable between an engaged position, in which a drive-effective connection to the drive motor exists, and a disengaged position, in which the drive-effective connection is released. The drive element is preloaded in the direction of the engaged position by a preload element to allow it to move translationally into the disengaged position in the event of overloading of the drive mechanism.