Helical Groove Clamping Mechanism for Low-Wear Coupling
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Solution Overview
Problem
Existing clamping systems experience significant wear due to the radial movement of spheres during the build-up of coupling forces, leading to undesirable wear and inefficiencies.
Innovation Solution
A clamping system design where clamping spheres move circumferentially along helical groove courses to build up coupling forces, reducing material wear and incorporating a rotating mechanism to minimize friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spheres are moved radially to build up coupling force, then the clamping mechanism can be activated, but significant wear occurs on the groove periphery
Solution Approach 1:
The invention changes the movement direction of the spheres from radial (perpendicular to coupling axis) to axial (parallel to coupling axis). This dimensional change allows the spheres to build up coupling force without contacting the groove periphery, thereby eliminating wear while maintaining activation functionality
Solution Approach 2:
The invention introduces an activation member with a cam surface that acts as an intermediary. The cam surface guides the axial movement of spheres and converts rotational movement into linear axial displacement, enabling force buildup without direct radial contact between spheres and groove periphery
2Force
If activation member presses spheres radially onto groove periphery, then coupling force is built up, but high forces create undesirable wear
Solution Approach 1:
The invention redirects the force application from radial direction to axial direction. The activation member applies force axially to move spheres along the coupling axis, building up coupling force between contact faces without generating high radial forces that cause wear on the groove periphery
3Ease of operation
If spheres are displaced in radial guides toward center of groove, then coupling is prepared, but radial movement is required for activation
Solution Approach 1:
The invention replaces radial guides with axial guides. The sphere guides now constrain movement in the axial direction (parallel to coupling axis) rather than radial direction, simplifying the mechanism by eliminating the need for radial displacement while maintaining proper coupling preparation
Solution Approach 2:
The activation member with its cam surface serves as an intermediary that eliminates the need for complex radial guide mechanisms. The cam surface directly converts rotational activation into axial sphere displacement, simplifying the overall guide mechanism while maintaining ease of operation
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 reduces material wear and enhances the efficiency of the clamping process by minimizing friction and ensuring precise alignment of components.
Implementation Method 1
at least three clamping spheres (6), which are mounted at positions (5a) of the second element (5), which are fixed in the circumferential direction and in the radial direction, so as to be able to roll along a circular line leading about the first mechanism axis (2a)
Implementation Method 2
The clamping portions (9b) are formed by helical groove courses having tangential components about the rotation axis and having components parallel to the rotation axis
Implementation Method 3
incorporating a rotating mechanism to minimize friction
Data Source
AI summary
A clamping system having first and second clamping mechanisms with respective contact faces, that are couplable such that the contact faces press together with a coupling force. The first clamping mechanism has first and second elements and at least three clamping spheres, the first and second elements being twistable relative to one another, and the clamping spheres being mounted on fixed positions of the second element to be rollable along a circular line. The second clamping mechanism has groove guides assigned to the clamping spheres which have helical groove courses in clamping portions. When coupling the clamping mechanisms, by twisting the second element relative to the first, first regions of the clamping spheres are moved to a clamping position which presses the contact faces together via coupling force. When coupling, the clamping spheres in the clamping portions roll over large distances, leading to low wear and activation with reduced force.