Rolling-Roller Clamping Spindle for High-Force Low-Effort Tensioning
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Solution Overview
Problem
Existing clamping devices face challenges in achieving a simple and effective clamping mechanism with high clamping force while minimizing the effort required to rotate the nut or spindle body, often due to high frictional forces associated with conventional threaded engagements.
Innovation Solution
The clamping device employs a spindle body with axially rotatably mounted roller bodies and engagement structures that allow for ring-shaped displacement relative to the nut element without threaded engagement, reducing frictional forces and enabling high clamping force with reduced effort, using roller bodies that can be brought into engagement with spindle body threads or grooves for effective clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional threaded engagement is used between nut and spindle, then clamping force can be generated, but high frictional forces increase the effort required to rotate the nut or spindle
Solution Approach 1:
The patent replaces the conventional sliding friction-based threaded engagement with a rolling friction-based system using roller bodies. The roller bodies are arranged between the nut and spindle, converting the sliding friction mechanism into a rolling friction mechanism, which significantly reduces the effort required to rotate the nut or spindle while maintaining clamping force generation capability
Solution Approach 2:
The roller bodies act as intermediary elements between the nut and spindle. These rollers mediate the force transmission between the rotating nut/spindle and the clamping action, reducing direct frictional contact while enabling the generation of clamping force through the rolling motion and geometric arrangement of the rollers
2Reliability
If threaded engagement is used for clamping, then reliable clamping force is achieved, but the clamping process is time-consuming
Solution Approach 1:
The patent substitutes the time-consuming threaded engagement process with a faster rolling-based mechanism. The roller bodies enable quicker force transmission and clamping action compared to traditional threading, reducing the time required to achieve reliable clamping while maintaining the reliability through the rolling friction mechanism and geometric design
3Adaptability or versatility
If conventional vice mechanism is used, then workpiece clamping is achieved, but adjustment for different workpiece sizes is slow
Solution Approach 1:
The patent replaces the slow conventional vice adjustment mechanism with a faster rolling-based adjustment system. The roller bodies enable rapid repositioning and adjustment of the clamping elements for different workpiece sizes, significantly increasing the speed of adjustment while maintaining adaptability through the modular roller arrangement and geometric design
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
This solution allows for easy and quick clamping of objects with high clamping force, reducing the effort needed to rotate the nut or spindle body, as it minimizes sliding friction and maximizes rolling friction, enabling efficient clamping of components and workpieces.
Implementation Method 1
the frictional forces acting when the nut element is screwed to the spindle body are significantly reduced. All that needs to be overcome is rolling friction and not sliding friction like with conventional threads.
Data Source
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AI summary
The invention relates to a clamping device for clamping an object, comprising a spindle body (3; 61; 71; 91; 103) and a nut element (5; 65; 105) that can be screwed to the spindle body (3; 61; 71; 91; 103), wherein by screw actuation of the spindle body (3; 61; 71; 91; 103) and/or the nut element (5; 65; 105) a distance between a first and a second clamping element of the clamping device (1; 63) can be reduced and thus an object arranged between the clamping elements can be clamped by means of the clamping elements. According to the invention, the mother element (5; 65; 105) has several, in particular cylindrical, roller bodies (14; 69) with a defined roller engagement structure (35), wherein the roller bodies (14; 69) are axially rotatable on a, in particular sleeve-shaped, receiving body (11) of the mother element (5; 65; 105) and are distributed circumferentially (U) on the mother element (5; 65;105) are arranged such that several engagement areas (45), in particular distributed and/or spaced apart from one another, with a spindle body engagement structure (47) each, are formed on the spindle body (3; 61; 71; 91; 103), wherein the roller bodies (14; 69) with their roller engagement structure (35) are in engagement with the spindle body engagement structures (47) of the spindle body (3; 61; 71; 91; 103) or can be brought into engagement with the spindle body engagement structures (47) of the spindle body (3; 61; 71; 91; 103), that the nut element (5; 65; 105) is engaged with the spindle body (3; 61; 71; 91; 103) by means of the engagement structures (35, 47) of the spindle body (3; 61; 71; 91; 103) and the roller bodies (14; 69), in particular by rolling the roller bodies on the spindle body. 91; 103) is screwable.;