Threaded Rod Locking Sleeve for Adjustable Anti-Rotation Joints
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Solution Overview
Problem
Existing rod-tube assemblies in mechanical connections lack a reliable locking mechanism that prevents unwanted pivoting while allowing for easy adjustment by screwing and unscrewing, which is essential for maintaining adjustable length connections and secure positioning.
Innovation Solution
A locking device comprising a sleeve with an inner lug sliding in a longitudinal groove of the rod, an elastic element, and anti-rotation forms that allow the tube to rotate freely by compressing and decompressing, enabling secure locking and unlocking positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking device is added to prevent unwanted pivoting, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking and unlocking functions are merged into a single rotational operation of the sleeve. The sleeve simultaneously performs locking by engaging with the rod's groove and unlocking by disengaging, eliminating the need for separate locking and unlocking mechanisms.
Solution Approach 2:
The locking mechanism transitions from a static fixed position to a dynamic system where the sleeve can rotate between locked and unlocked positions. The elastic element enables dynamic movement, allowing the mechanism to adapt between stable locked states and flexible unlocked states as needed.
2Stability of the object's composition
If a locking mechanism is implemented to secure positions, then stability is improved, but ease of operation deteriorates
Solution Approach 1:
The sleeve utilizes rotational movement around a circular path to achieve locking and unlocking. This curved motion path provides mechanical advantage and smooth transitions between states, making the operation easier compared to linear locking mechanisms.
Solution Approach 2:
The complex multi-step locking process is replaced by a simple rotational action of the sleeve. The elastic element substitutes for complex spring-loaded or cam-based locking mechanisms, providing stable locking with minimal user input.
3Reliability
If the tube is constrained to prevent rotation, then reliability is improved, but adaptability deteriorates
Solution Approach 1:
The system dynamically switches between two states: when the sleeve is in the locked position, the tube is constrained against rotation for reliable positioning; when the sleeve is rotated to the unlocked position, the tube gains rotational freedom for adjustment. The elastic element enables this dynamic state transition.
Solution Approach 2:
The elastic element is pre-compressed to store energy that will be released during the unlocking rotation. This preliminary energy storage ensures that when the sleeve rotates to unlock, there is sufficient force to quickly release the constraint and allow free tube rotation.
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 locking device effectively secures the rod and tube positions while allowing for easy adjustment by compressing and decompressing the elastic element, providing multiple locked positions and ensuring the tube can rotate freely when needed.
Implementation Method 1
an elastic element connected to the locking sleeve, said locking sleeve and said elastic element being movable between a locked position and a release position
Data Source
AI summary
The present invention relates to a locking device (10), comprising a threaded rod (12) and a tapping tube (14), which are movable relative to each other. An outer surface of the tube includes a first anti-rotation form.The device further comprises: a locking sleeve (16) positioned around the rod and comprising a second anti-rotation form (60, 62) capable of being assembled to the first anti-rotation form; and an elastic element (18) connected to the locking sleeve.In a locked position, the first (38, 40) and second (60, 62) anti-rotation forms are assembled; and in a release position, said anti-rotation forms are axially spaced apart, whereby the tube is free to rotate relative to the sleeve.