Collet-to-Shaft Coupling Structure for Concentric Clamping
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Solution Overview
Problem
Existing components for connecting a rotor to a clamping receptacle can impair the clamping process by exerting forces that lead to incorrect measurements and affect the concentricity of the clamping holder, especially in centrifugal force compensation systems.
Innovation Solution
A cup-shaped thin-walled housing with fastening means that have recesses on their base surface, allowing for a rotationally fixed connection to the shaft without deforming the housing, ensuring a stable and rigid transmission of forces and torque while maintaining radial flexibility to avoid influencing centrifugal force compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fastening means are used to fix the clamping receptacle in the housing, then the clamping receptacle is securely positioned, but the housing may deform under clamping forces
Solution Approach 1:
The base area of the fastening means is designed with recesses that create point contacts rather than continuous surface contact. This localizes the contact areas on the housing outer surface, distributing clamping forces to specific regions while leaving other areas free to deform naturally under centrifugal loads, thus preventing overall housing deformation
Solution Approach 2:
The recesses in the base area of the fastening means are pre-designed to anticipate and accommodate the deformation forces that will occur during operation. By preparing these recesses in advance, the housing can deform without creating harmful stress concentrations or compromising the secure positioning of the clamping receptacle
2Manufacturing precision
If the housing is made rigid to maintain concentricity, then positioning accuracy is improved, but centrifugal force compensation is impaired
Solution Approach 1:
The housing is designed with differentiated local properties: the base area contact zones provide rigid positioning for concentricity, while the thin-walled cylindrical portion maintains radial flexibility for centrifugal force compensation. This spatial differentiation of mechanical properties resolves the contradiction between rigidity and flexibility
Solution Approach 2:
The housing transitions from a static rigid structure to a dynamic structure that adapts its stiffness characteristics. The thin-walled design allows the housing to deform radially under centrifugal forces while maintaining axial positioning accuracy, enabling both concentricity and centrifugal force compensation to function properly
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 provides a stable and concentric connection that prevents deformation of the housing, ensuring accurate clamping and torque transmission without affecting the centrifugal force compensation, allowing for reliable attachment and detachment of the rotor.
Implementation Method 1
the housing has a certain radial flexibility due to its thin-walled design, so that no influence is exerted on a centrifugal force compensating clamping fixture
Implementation Method 2
fastening means are arranged with their base area on the outer circumferential surface of the housing and can be brought into engagement with the clamping receptacle through bores present in the housing and have at least one recess in the base area, so that their base area only rests on the outer circumferential surface in some areas
Data Source
Figure 1~2
Figure 3
AI summary
In a component (1) for connecting a shaft to a clamping holder (6) which can hold a rotor, it is proposed that the clamping holder can be introduced into a pot-like housing (2) and can be fixed there by means of a fastener (13). On the housing base (3) of the housing (2), connection means (7) are provided for connecting the housing (2) to the shaft for conjoint rotation. The base surface (17) of the fastener (13) is arranged on the outer lateral surface (12) of the housing (2) and the fastener can be brought into engagement with the clamping holder (6) through boreholes provided in the housing (2). The fastener (13) has at least one recess (18) in the base surface (17) such that the base surface (17) of the fastener rests on the outer lateral surface (12) only in some regions.