Sliding Locking Teeth Mechanism for Compact Shaft Coupling
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Solution Overview
Problem
Existing switchable locking devices are inefficient and require significant space and weight, limiting their adaptability to various mechanical applications.
Innovation Solution
A switchable locking device with an internal lock and external case that can be selectively switched between 'ON' and 'OFF' states through sliding engagement, allowing for efficient rotation transmission or disconnection from an external rotational shaft, utilizing either a hydraulic or electro-magnetic system for activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional switchable locking devices are used, then locking function is achieved, but space and weight requirements increase
Solution Approach 1:
The internal lock is nested within the external case, with the internal lock's tubular structure containing locking teeth that engage with slots in the external case. This nested configuration allows the locking mechanism to be compact and integrated, reducing overall device weight while maintaining reliable locking function.
Solution Approach 2:
The locking device is segmented into distinct functional components: the external case with locking slots, the internal lock with external locking teeth, and the internal locking teeth on the tubular structure. This segmentation allows each component to be optimized independently for weight reduction while maintaining the overall locking function.
2Reliability
If conventional switchable locking devices are used, then locking function is achieved, but operational efficiency is low
Solution Approach 1:
The internal lock is designed to slide dynamically within the external case along a defined path, transitioning between engaged and disengaged states. This dynamic sliding mechanism, combined with the meshing engagement of locking teeth and slots, enables rapid and efficient switching between locked and unlocked states, significantly improving operational efficiency.
3Reliability
If conventional switchable locking devices are used, then basic locking application is achieved, but adaptability to various mechanical applications is limited
Solution Approach 1:
The locking device is designed with universal adaptability through its modular structure. The external case can be configured for different applications (transfer gearbox, ladder lock, articulated components), and the internal lock mechanism remains consistent. The meshing engagement system with adjustable geometry allows the same basic design to serve multiple mechanical applications effectively.
4Productivity
If internal lock slides within external case to switch states, then switching speed is improved, but structural complexity increases
Solution Approach 1:
The switching mechanism merges the sliding motion of the internal lock with the meshing engagement of the locking teeth and slots. Instead of separate switching and locking mechanisms, the sliding action simultaneously achieves both state transition and secure engagement. This merging reduces structural complexity while maintaining rapid switching 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 reduces space and weight requirements, enhancing operational efficiency and adaptability for applications such as 2WD to 4WD conversion, static position locking, and articulated components, while maintaining high operational efficiency.
Implementation Method 1
The internal lock is switched between the 'ON' state and the 'OFF' state by a hydraulic system (hydraulic pressure device) incorporated to the external case and the internal lock
Implementation Method 2
Alternatively, the internal lock is switched between the 'ON' state and the 'OFF' state by an electro-magnetic system incorporated to the external case and the internal lock
Data Source
AI summary
A lock device has a pair of locking elements with internal locking teeth, a pair of shafts with external locking teeth configured for meshing engagement with the internal locking teeth, a pair of housing portions configured to receive and retain the respective shafts, and a case configured to receive the locking elements. The locking elements are permitted to undergo sliding movement within the case between first and second states of the lock device. In the first state, the internal locking teeth of the locking elements are disposed in respective meshing engagement with the external locking teeth of the shafts so that the case cannot undergo rotational movement relative to the shafts. In the second state, the internal locking teeth of the locking elements are not disposed in meshing engagement with the external locking teeth of the shafts so that the case can undergo rotational movement relative to the shafts.