Self-Adaptive Locking Clamp for Deformation-Stable Grip
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Solution Overview
Problem
Existing clamping apparatuses face issues with geometric elastic deformation that destabilize pawl and ratchet self-locking mechanisms, leading to jamming or disengagement during high stress operations, particularly in applications like jar openers and oil filter wrenches, where fulcrum placement exacerbates deformation.
Innovation Solution
A self-adaptive self-locking mechanism using an integrated pawl and ratchet locking system with a scissor linkage and torsion/compression springs that maintain clamping force and gap adjustment, even under stress and deformation, through a self-adaptive self-locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pawl and ratchet self-locking mechanism is used in a clamping apparatus, then self-locking function is achieved, but geometric elastic deformation under stress destabilizes the mechanism causing it to jam or disengage
Solution Approach 1:
The patent employs a dynamic self-adjusting mechanism where the pawl and ratchet components can move relative to each other to accommodate geometric elastic deformation. The linkage system includes movable connection points and flexible elements that allow the mechanism to adapt its geometry during stress, maintaining proper engagement angles and preventing jamming or disengagement while preserving the self-locking function.
2Power
If fulcrum is placed on one end for jar opener and oil filter wrench applications, then leverage is maximized, but deformation is exacerbated destabilizing the self-locking mechanism
Solution Approach 1:
The patent segments the clamping apparatus into multiple independent linkage segments connected by pivots and joints. This segmentation allows each segment to deform independently under stress, distributing the deformation throughout the structure rather than concentrating it at the fulcrum. The modular linkage system maintains overall structural integrity and self-locking capability while accommodating the high leverage forces generated by end-placed fulcrums.
3Adaptability or versatility
If quick adjustment of clamping gap is implemented, then adaptability to different workpiece sizes is improved, but mechanism complexity increases
Solution Approach 1:
The patent designs the linkage system with universal joints and standardized connection points that serve multiple functions: they enable quick adjustment of the clamping gap to accommodate different workpiece sizes, maintain the self-locking mechanism's geometric relationships, and accommodate elastic deformation. The same linkage components facilitate both adjustment and load-bearing functions, reducing overall device complexity while improving adaptability.
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 mechanism ensures sustained clamping force and self-locking engagement by adapting to geometric deformation, maintaining grip on workpieces without continuous user input, benefiting users with weak hand grip or dexterity issues.
Implementation Method 1
a first spring assembly comprising a torsion spring
Implementation Method 2
a second spring assembly comprising a compression spring
Implementation Method 3
so that friction can be generated to firmly lock the workpiece in a position
Data Source
AI summary
The self-adaptive self-locking clamping apparatus comprises a pair of arms pivotally interconnected to each other via a fulcrum either in the middle or on one end of the pair of arms, forming a pair of jaws with at least a variable gap for load, a fulcrum and a pair of handles for effort. The pair of handles engage with each other via a pawl and ratchet mechanism to achieve directional self-locking function, so that the clamping force applied to the pair of handles are maintained after such clamping force is removed. The self-locking pawl and ratchet engagement is self-adaptive to the geometric deformation of the pair of arms resulted from the elastic deformation caused by the clamping force, creating a firm locking grip so that a user does not have to keep maintaining the clamping force while in operation.