Zero-Point Clamping Plate With Toggle Lever Force Amplification
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Solution Overview
Problem
Conventional zero-point clamping plates for machine tools lack sufficient holding force while maintaining precise positioning, which is essential for optimal manufacturing quality and efficiency.
Innovation Solution
Integration of lever arms in the power flow between the drive element and the clamping wedge to amplify the clamping force, utilizing a toggle lever mechanism that increases force transmission as the clamping wedge approaches its end position, allowing for higher holding force without compromising positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional fastening mechanisms are used in zero-point clamping plates, then the structure remains simple, but the holding force is insufficient
Solution Approach 1:
The patent applies the dynamics principle by implementing a toggle lever mechanism that transforms the rotational movement of the drive spindle into a translational movement of the clamping wedge. The mechanism dynamically adjusts the clamping force through the geometric relationship of the lever arms, where the angle between the lever arms changes during the clamping process to amplify the holding force significantly as the clamping wedge approaches its end position.
Solution Approach 2:
The patent applies the parameter changes principle by utilizing the changing angle between the lever arms during the clamping process. As the clamping wedge moves toward the end position, the angle between the lever arms changes, which dynamically amplifies the clamping force. This parameter change (angle variation) allows the system to generate high holding force without requiring a complex multi-component fastening mechanism.
2Force
If higher clamping force is achieved through conventional means, then holding force increases, but positioning precision deteriorates
Solution Approach 1:
The toggle lever mechanism dynamically optimizes the force transmission ratio during the clamping process. In the initial stage, the mechanism allows for precise positioning with minimal force, and as the clamping wedge approaches the end position, the geometric relationship of the lever arms automatically amplifies the force while maintaining the achieved position. This dynamic characteristic ensures both positioning precision and high holding force.
Solution Approach 2:
The lever arms act as intermediaries between the drive element and the clamping wedge. The toggle lever mechanism serves as a mediator that decouples the positioning function (achieved during the approach phase) from the force amplification function (achieved during the final clamping phase). This intermediary mechanism allows high clamping force to be generated without compromising the positioning precision that was established earlier in the process.
3Force
If minimal additional parts are used, then device complexity remains low, but clamping force amplification is limited
Solution Approach 1:
The lever arms in the toggle lever mechanism serve multiple functions simultaneously: they transmit the rotational movement from the drive spindle, amplify the clamping force through their geometric relationship, and guide the clamping wedge along its path. This multi-functionality allows significant force amplification to be achieved with minimal additional parts, as the same components perform multiple critical functions in the clamping process.
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
Significantly enhances the clamping force generated by the clamping wedge with minimal additional parts, ensuring precise and repeatable positioning of clamping devices on machine tools, thereby improving manufacturing quality and reducing setup times.
Implementation Method 1
at least one lever arm for force amplification in the force flow between the drive element and the clamping wedge
Implementation Method 2
at least one clamping wedge, which is operatively connected to the drive element and is configured to move as a function of a movement of the drive element
Data Source
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AI summary
The invention relates to a zero-point clamping plate (1) for mounting clamping devices on machine tools, in particular on milling and/or turning machines, with a plurality of mounting recesses (5) which are configured to each receive a correspondingly dimensioned mounting element of a clamping device, and a fastening mechanism (9) embedded in the clamping plate (1) which is configured to reversibly and releasably fix the mounting elements when they are engaged with the mounting recesses (5), wherein the fastening mechanism (9) has a drive element drive spindle (13) and at least one clamping wedge (27) which is operatively connected to the drive spindle (13) and is configured to extend into the mounting recesses (5) as a function of a rotational movement of the drive element of the drive spindle (13).The invention proposes that at least one lever arm (29, 31) is provided in the force flow between the drive element spindle (13) and the clamping wedge (27) for force amplification.