Clamping Ring Shaft Assembly With Anti-Loss Dual Pins
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Solution Overview
Problem
Existing shaft-hub connections, particularly those involving adapter shafts and clamping rings, lack a reliable non-positive connection that balances material distribution and provides adequate protection against loss, while maintaining high pressing force and elasticity.
Innovation Solution
A clamping ring is used to connect an adapter shaft to a shaft, featuring a first threaded pin that presses onto a flattened area of the adapter shaft and a second threaded pin that protrudes into a recess, forming an anti-loss device, with axial slots for enhanced elasticity and a chamfer for easy installation, ensuring a non-positive connection with integrated captive security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a clamping ring with single threaded pin is used to connect adapter shaft to shaft, then high pressing force is achieved, but protection against loss is insufficient
Solution Approach 1:
The single threaded pin function is segmented into two distinct threaded pins: the first threaded pin (2) provides pressing force through the flattened area (20), while the second threaded pin (3) provides protection against loss through the recess (30). This segmentation allows each pin to specialize in one function, resolving the contradiction between achieving high pressing force and providing adequate protection against loss.
2Reliability
If material is removed from adapter shaft to create recess and flattening, then protection against loss and pressing surface are provided, but material distribution balance is disrupted
Solution Approach 1:
The recess (30) and flattened area (20) are positioned asymmetrically at diametrically opposite locations on the adapter shaft (1). This asymmetric arrangement ensures that the mass moments of inertia are balanced, preventing the adapter shaft from becoming unbalanced despite material removal. The solution resolves the contradiction by strategically placing the material removal zones to maintain rotational balance while providing the necessary functional features.
3Reliability
If multiple threaded pins and recesses are added to provide protection against loss, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective function against loss is merged into the existing clamping ring structure by integrating the second threaded pin (3) and its associated recess (30) with the first threaded pin (2) and flattened area (20). Both pins are incorporated into the same clamping ring (4), creating a unified component that provides both pressing force and protection against loss without requiring separate protective devices, thus minimizing additional complexity.
4Adaptability or versatility
If axial slots are added to adapter shaft, then elasticity is enhanced, but manufacturing complexity increases
Solution Approach 1:
The axial slots (10) are pre-formed in the adapter shaft (1) during the manufacturing process, enabling the shaft to achieve the necessary elasticity for the force-fit connection before assembly. This preliminary preparation of the slots ensures that the adapter shaft can be easily expanded or contracted during installation and operation, while the slot formation is integrated into the manufacturing workflow, minimizing the impact on manufacturing complexity.
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 achieves a high pressing force, balances material distribution, and provides protection against loss without additional balancing measures, while allowing for simple production and easy assembly, ensuring a secure and elastic non-positive connection.
Implementation Method 1
the first threaded pin presses onto the adapter shaft, wherein the threaded pin has a diameter at least three times larger than the second threaded pin
Implementation Method 2
the adapter shaft has axial slots, wherein the axial slots are regularly spaced apart from one another in the circumferential direction and/or the axial slots extend radially through and/or open at a first axial end of the adapter shaft
Data Source
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AI summary
The invention relates to an assembly for connecting an adapter shaft (1) to a shaft in a force-fitting manner using a clamping ring (4), wherein the clamping ring is plugged onto the adapter shaft, the shaft is inserted into the adapter shaft, and the clamping ring has a first radially continuous threaded bore into which a first screw part, in particular a first threaded pin (2), is screwed, said screw part being pressed onto the adapter shaft. The clamping ring (4) has a second radially continuous threaded bore into which a second screw part, in particular a second threaded pin (3), is screwed, wherein the second screw part at least partly protrudes into a depression of the adapter shaft, in particular the second screw part is pressed onto the adapter shaft.