Toggle Clamp Zero-Angle Clamping Element
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Solution Overview
Problem
Current toggle clamps with angled clamping arms cause workpieces to move during clamping due to the angle of contact, necessitating the use of shims to offset the angle and ensure transverse clamping without movement.
Innovation Solution
A toggle clamp design featuring a base with a support and securement portion, a handle mechanism, and a clamping arm that pivots about a pivot pin, with a biased clamping element moving transverse to the workpiece, utilizing a linkage and helical spring mechanism to maintain a zero-angle contact through a linear motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the clamping arm contacts the workpiece at an angle, then the clamping mechanism can be simpler in structure, but the workpiece may move during clamping
Solution Approach 1:
The clamping mechanism is divided into two functional parts: the clamping arm that provides mechanical advantage through angular contact, and the clamping element that provides transverse clamping force. This segmentation allows each component to perform its specialized function - the arm simplifies the mechanism while the element ensures workpiece stability.
Solution Approach 2:
The clamping element acts as an intermediary between the angled clamping arm and the workpiece. It converts the angular motion and force from the clamping arm into transverse clamping force, mediating between the simple angular contact mechanism and the requirement for stable workpiece clamping.
2Stability of the object's composition
If shims are used to offset the angle of the clamping arm, then the workpiece can be clamped transverse without movement, but the device complexity increases
Solution Approach 1:
The clamping element automatically self-adjusts during the clamping motion. As the clamping arm rotates and the clamping element moves toward the workpiece, it naturally orients itself to contact the workpiece at the correct transverse angle, eliminating the need for external shims or adjustment mechanisms.
Solution Approach 2:
The clamping element is designed to move dynamically during clamping, transitioning from a retracted position to a forward position where it contacts the workpiece. This dynamic motion allows the element to automatically achieve the correct clamping orientation without static adjustments like shims.
3Stability of the object's composition
If the clamping element moves in a linear direction transverse to the workpiece, then the workpiece is secured without movement, but the mechanism requires additional linkage components
Solution Approach 1:
The linkage mechanism is merged with the clamping arm assembly rather than being a separate system. The clamping element is integrated into the clamping arm structure, and the linkage components work together as a unified mechanism to convert rotational motion into linear clamping motion.
Solution Approach 2:
The linkage mechanism provides continuous useful action throughout the clamping cycle. As the handle is actuated, the linkage continuously converts the rotational motion of the clamping arm into linear motion of the clamping element, maintaining effective clamping force throughout the entire motion sequence.
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 clamp effectively secures the workpiece without movement by ensuring the clamping element contacts the workpiece along a zero-angle line, providing a stable and secure clamping mechanism.
Implementation Method 1
The biasing clamping element includes a plunger, a helical spring surrounding the plunger
Data Source
AI summary
A toggle clamp has a base with a support portion and a securement portion. A handle mechanism is connected to the base support portion. A clamping arm is movably supported by a pivot pin on the base support portion. The clamping arm is coupled with the handle mechanism. The clamping arm includes a clamping element that moves transverse to the workpiece. The handle is moved between a first and second position. The clamp arm pivots about the pivot pin on the base until reaching a stop position. The handle continues to a clamping second position as the clamping element moves linearly transverse toward the workpiece into a clamped position.