Threaded Coupling Sleeve Locking for Adjustable Friction Fixing
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Solution Overview
Problem
Existing coupling arrangements are complex in structure and lack a simplified design that effectively secures components through frictional forces.
Innovation Solution
A coupling arrangement with a clamping sleeve featuring coordinated locking geometries on its inner and outer surfaces with the first coupling part, allowing for adjustable frictional forces through rotational positioning, ensuring secure fixation without significant deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coupling arrangements are used to connect components, then the connection is secure, but the structure becomes complex
Solution Approach 1:
The clamping sleeve integrates multiple functions into a single component: it provides frictional connection between coupling parts, enables adjustable clamping force through rotational positioning, and incorporates locking geometries for securing the connection. This merging of functions reduces the number of separate components needed while maintaining connection security.
Solution Approach 2:
The clamping sleeve serves multiple purposes within the coupling arrangement: it acts as a friction element, an adjustment mechanism, and a locking device. The same component that creates frictional connection also provides adjustable clamping force and securing through its locking geometries, making the structure more compact and less complex.
2Adaptability or versatility
If frictional forces are used to secure coupling parts, then the connection is adjustable, but the structure requires additional components
Solution Approach 1:
The clamping sleeve combines the friction-generating surface, the adjustment mechanism, and the locking system into a single integrated component. The inner surface provides friction, the rotational capability enables adjustment, and the locking geometries secure the position, eliminating the need for separate adjustment devices and locking mechanisms.
Solution Approach 2:
The clamping sleeve is self-adjusting through its rotational capability, allowing the user to directly control the frictional force and clamping pressure by rotating the sleeve to different angular positions. The locking geometries automatically engage at specific positions to maintain the adjusted state without requiring additional fastening components.
3Reliability
If locking geometries are added to adjust frictional forces, then the connection becomes more secure, but the manufacturing complexity increases
Solution Approach 1:
The locking geometries on the inner and outer surfaces are designed with asymmetric shapes that interengage at specific angular positions. This asymmetric design provides secure locking through geometric interlocking while being manufacturable using standard machining operations for creating non-circular profiles on cylindrical surfaces.
Solution Approach 2:
The locking geometries are localized features on specific portions of the clamping sleeve and coupling part surfaces. Rather than requiring complex overall geometries, the locking features are concentrated in specific local areas, allowing the majority of the component surfaces to maintain simple cylindrical shapes that are easy to manufacture.
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 arrangement provides a secure and adjustable frictional connection between coupling parts, enabling easy assembly and disassembly while maintaining a stable joint under various conditions.
Implementation Method 1
These radially inward-acting forces, which can also be referred to as normal forces, cause frictional forces between the internal thread formed on the end section of the first coupling part and the end section of the second coupling part provided with the external thread, which frictional forces act in a circumferential direction of the external thread and which ensure the desired fixing of the second coupling part to the first coupling part.
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
The invention relates to a coupling arrangement (1) comprising a first coupling part (11) and a second coupling part (42), an end portion (21) of the first coupling part (11) being provided with an internal screw thread (19) that extends along a screw thread axis (2), and an end portion (21) of the second coupling part (42) being provided with an external screw thread (44) that extends along the screw thread axis (2) and is screwed into the internal screw thread (19) of the first coupling part (11). According to the invention, a clamping sleeve (23) is rotatably accommodated on an outer surface (22) of the end portion (21) of the first coupling part (11), an inner surface (25) of the clamping sleeve (23) and the outer surface (22) of the end portion (21) of the first coupling part (11) each having, in a cross-sectional plane oriented transversely to the screw thread axis (2), locking geometries (26, 46, 47, 48) which deviate from a circular geometry and correspond to one another.