Toggle Clamping Device Locking Mechanism Wear Reduction
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Solution Overview
Problem
Toggle lever clamping devices in the automotive industry face issues with unintentional movement of the clamping arm due to pressure drops or heavy loads, leading to potential damage or injury, and existing locking mechanisms experience wear and require high torque for secure locking.
Innovation Solution
The clamping device incorporates a first locking means with movable portions and rollers that increase spacing against a spring force, allowing for secure locking with reduced wear and adjustable locking force, enabling the clamping arm to be locked in a desired position without unintentional movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is used to prevent unintentional movement of the clamping arm, then reliability is improved, but device complexity increases due to the need for multiple locking means and their interaction mechanisms
Solution Approach 1:
A spring element is introduced as an intermediary between the first and second locking means. This spring mediates the interaction by providing a force that pushes the clamping arm toward the locked position, reducing the complexity of direct mechanical engagement while maintaining reliable locking through the coordinated action of multiple simpler components
Solution Approach 2:
The locking mechanism is divided into separate locking means (first locking means and second locking means) that function independently but coordinate through the spring intermediary. This segmentation allows each component to be simpler while the system as a whole achieves high reliability through distributed locking functions
2Reliability
If a secure locking mechanism is implemented to prevent clamping arm movement, then reliability is improved, but manufacturing complexity increases due to precision requirements for the locking means interaction
Solution Approach 1:
The spring constant and pre-load force of the spring intermediary are optimized to provide sufficient locking force while accommodating normal manufacturing tolerances. By adjusting these parameters, the system achieves secure locking without requiring extremely precise manufacturing of the locking means engagement surfaces
Solution Approach 2:
The spring element provides a cushioning force that compensates for minor variations in manufacturing precision. This beforehand cushioning ensures that the locking means interact reliably even when there are small deviations in the dimensions or positions of the locking surfaces
3Reliability
If locking means with high interaction force are used to secure the clamping arm, then reliability is improved, but wear increases due to the force required for secure locking
Solution Approach 1:
The spring acts as a force-distributing intermediary that reduces peak contact forces between the locking means. Instead of one locking point bearing the full locking force, the spring distributes this force across multiple contact points and over time, significantly reducing wear on individual components while maintaining secure locking
Solution Approach 2:
The spring provides beforehand cushioning by absorbing and distributing the locking forces before they reach the locking means contact surfaces. This cushioning effect reduces the intensity of force transmission, thereby minimizing wear and extending the service life of the locking components
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 ensures secure and low-wearing interaction between locking means, allowing for easy adjustment of locking force based on torque, reducing wear and preventing unintentional movement of the clamping arm, thus enhancing safety and operational efficiency.
Implementation Method 1
the two portions, with the second locking means acting upon the two projections, are movable toward one another against a spring force with the spacing between the projections increasing
Data Source
AI summary
A clamping device has a clamping arm mounted pivotable in a housing of the clamping device, a first locking means pivotable corresponding to the pivoting movement of the clamping arm, and a second locking means arranged in the pivot path of the first locking means and mounted in the housing, wherein the two locking means interact in an end position of the clamping arm. The first locking means, in the region of the end remote from the pivot axis of the first locking means, on the side facing the second locking means, has a recess defined at the side by two projections, wherein the second locking means contacts the projections when the clamping arm pivots into the end position thereof and is inserted into the recess in the end position, wherein the first locking means has a first portion which receives the first projection, and a second portion which receives the second projection, wherein the two portions, with the second locking means acting upon the two projections, are movable toward one another against a spring force with the spacing between the projections increasing.