Switchable Locking Shaft Coupling With Nested Sliding Lock
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Solution Overview
Problem
Existing switchable locking devices are inefficient in operation, require large space, and are not adapted for various mechanical applications, leading to increased weight and inefficiency.
Innovation Solution
A switchable locking device with an internal lock and external case that can be selectively switched between 'ON' and 'OFF' states, allowing for efficient space reduction and weight optimization through sliding engagement of locking teeth and slots, activated by hydraulic or electro-magnetic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional switchable locking devices are used, then locking function is provided, but the device requires large space and increases overall weight
Solution Approach 1:
The internal lock is positioned inside the external case, with the locking teeth of the internal lock engaging with locking slots formed in the external case. This nested configuration allows the locking mechanism to be compact while maintaining reliable locking function, as the internal lock operates within the confines of the external case rather than requiring separate external components.
Solution Approach 2:
The locking and unlocking functions are integrated into a single sliding motion of the internal lock relative to the external case. As the internal lock slides, its locking teeth simultaneously disengage from one set of locking slots and engage with another, combining multiple locking positions into one continuous motion sequence, thereby reducing space while maintaining reliability.
2Adaptability or versatility
If conventional switchable locking devices are used, then locking function is provided, but the device structure is complex and not adapted for various mechanical applications
Solution Approach 1:
The locking device is designed with a universal structure where the internal lock can slide within the external case to provide multiple locking positions (first locking position, second locking position, and unlocked position). This multi-functional design allows the same basic mechanism to be applied to various mechanical applications including transfer gearboxes, folding ladders, and articulated components, enhancing versatility without increasing structural complexity.
Solution Approach 2:
The locking mechanism is segmented into distinct functional components: the internal lock with locking teeth, the external case with locking slots, and the spring mechanism. This segmentation allows each component to perform its specific function efficiently while maintaining overall simplicity, making the device adaptable to different applications without requiring complex redesign.
3Productivity
If internal lock slides within external case to switch between ON and OFF states, then operational efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The internal lock is designed to slide dynamically within the external case along a defined path, transitioning between locked and unlocked states. The locking teeth are configured to engage with locking slots at specific positions during this sliding motion. This dynamic design improves operational efficiency by allowing quick switching between states while the spring mechanism provides automatic positioning to maintain manufacturing tolerances.
Solution Approach 2:
The spring mechanism automatically biases the internal lock to engage with the locking slots, providing self-aligning and self-positioning functionality. This self-service mechanism reduces the need for high manufacturing precision by allowing the spring to compensate for minor tolerances and ensure proper meshing engagement between the locking teeth and slots during operation.
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 device operates with high efficiency and reduced space requirements, enhancing the performance of mechanical systems by integrating as a single, integral piece, and enabling versatile applications such as 2WD to 4WD conversion, static position locks, and articulated components.
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 switchable locking device has a switchable lock and an output shaft configured to receive the switchable lock and to be selectively connected to and disconnected from a rotational shaft via the switchable lock. When received by the output shaft, the switchable lock is configured to be selectively switched between an ON state and an OFF state. In the ON state of the switchable lock, the output shaft is connected to the rotational shaft for undergoing rotation therewith. In the OFF state of the switchable lock, the output shaft is disconnected from the rotational shaft and does not undergo rotation therewith.