Clamp Movement Management with Low-Friction Bearings for Smooth Release
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Solution Overview
Problem
Existing clamps face issues with jaw binding and sudden 'bar jump' movements during clamp force release, which can cause jerking and make it difficult to achieve precise adjustments.
Innovation Solution
Incorporation of low-friction bearings and a bar jump mitigation mechanism, including a release lever with pivotable brake plates and a jump mitigation spring, to prevent binding and control the release of clamp force, allowing smooth and controlled movement of the movable assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional clamp mechanism is used, then the clamp can apply force to hold workpieces, but the jaw binds to the bar and causes sudden bar jump movements during release
Solution Approach 1:
A bearing surface is introduced as an intermediary element between the jaw and the bar. This bearing surface, formed of low-friction material, acts as a mediator that prevents direct binding between the jaw and bar while still allowing the clamp to apply and release force controllably, eliminating the sudden bar jump movement during release.
Solution Approach 2:
The friction parameter between the jaw and bar is changed by introducing a low-friction bearing surface. This parameter change reduces the coefficient of friction significantly, allowing the jaw to move smoothly along the bar during clamp force release while maintaining reliable clamp force application when engaged.
2Ease of operation
If the movable assembly is disengaged from the bar, then the clamp force can be released, but the movable assembly binds to the bar causing jerking movements
Solution Approach 1:
The bearing surface serves as a mediator between the movable assembly and the bar during release. It allows the release lever to disengage the movable assembly smoothly by providing a low-friction interface, preventing the harmful binding and jerking movements that would otherwise occur when the clamp force is released.
3Ease of operation
If a standard bearing surface is used, then the movable assembly can move along the bar, but the bearing surface wears and allows excessive movement
Solution Approach 1:
The bearing surface is designed with specific local qualities - it is formed of low-friction material at the critical interface between the movable assembly and bar. This localized application of low-friction material provides smooth movement where needed while maintaining position stability through the bearing insert's structural design and alignment features.
Solution Approach 2:
The bearing surface is formed of a low-friction material that can be integrated into the movable assembly structure. This composite approach combines the low-friction property needed for smooth sliding with the structural integrity required for position stability, preventing both binding and excessive movement.
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 effectively prevents jaw binding and sudden jumps, enabling precise and smooth adjustment of clamp force, enhancing user control and safety.
Implementation Method 1
a bearing surface formed of a low-friction material, supported in the movable assembly, and positioned to prevent the movable assembly from binding to the bar when a clamp load is released
Data Source
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AI summary
A clamp includes a bar having top and bottom surfaces, a fixed jaw fixed to the bar, and a movable assembly movable along the bar. The movable assembly includes a movable jaw, an actuator that incrementally moves the movable assembly to apply a clamp force to a clamp load, a release lever to disengage the movable assembly to release a clamp force and permit free sliding of the movable assembly along the bar. The movable assembly may support a bearing surface formed of a low-friction material, positioned to prevent the movable assembly from binding to the bar when a clamp load is released. The release lever may be movable between a position engaging the bar, a position where the release lever disengages the bar, and another position engaging the bar, the third position being opposite the first position with the second position therebetween.