Friction Ring Structure for Cleanable Low-Friction Bobbin Clamping
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Solution Overview
Problem
Existing friction rings used in the packaging industry face challenges such as difficulty in cleaning due to disassembly requirements, limited durability, and complexity in production due to the positioning of springs and flat springs causing internal friction.
Innovation Solution
A friction ring design featuring a laterally open structure for easy cleaning, wire springs for long-lasting durability, and a synchronized ring with wire springs providing tension on balls to minimize internal friction, allowing for unidirectional and bidirectional clamping with a single synchronous ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed-circuit friction rings with flat springs are used, then the structure provides stable clamping force, but cleaning becomes difficult requiring complete disassembly
Solution Approach 1:
The friction ring is divided into separable components: the body, the synchronous ring, and the flat springs are treated as distinct elements that can be independently removed. This segmentation allows the synchronous ring to be accessed and cleaned without removing the entire friction ring assembly, resolving the contradiction between maintaining stable clamping force and enabling easy cleaning.
2Reliability
If flat springs are positioned on the body to provide tension on balls, then clamping function is achieved, but production complexity increases due to separate manufacturing requirements
Solution Approach 1:
The flat springs are integrated with the synchronous ring rather than being separately positioned on the body. This merging of components allows the springs to be pre-assembled with the synchronous ring as a single unit, simplifying production by reducing the number of separate assembly operations required while maintaining the clamping function.
3Reliability
If flat springs are used to provide tension on balls, then the balls can maintain contact with the synchronous ring, but internal friction increases causing energy loss
Solution Approach 1:
The patent changes the physical state of the spring material from rigid flat springs to elastomeric material. This parameter change allows the springs to deform elastically under load, providing the necessary tension on the balls to maintain contact with the synchronous ring while reducing internal friction and energy loss through the flexible, dampening properties of elastomeric materials.
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 new friction ring design enables efficient cleaning without disassembly, enhances durability with wire springs, and reduces internal friction, making it suitable for winding tear-sensitive materials with minimal operational complexity.
Implementation Method 1
a wire spring (40) disposed on the inner surface of the synchronous ring (20) that provides tension on the ball (30) to ensure that the bobbin rotates on the synchronous ring (20) without friction
Implementation Method 2
a body (10) comprising a cam (11), a spiral spring groove (12) and stroke determining groove (13) on its outer surface
Data Source
AI summary
Disclosed is a friction ring used for gripping paper, plastic, and steel bobbins in the packaging industry. The friction ring has a body with a cam, a spiral spin groove, and stroke determining groove on its outer surface. A ball that moves is on the cam and locks the bobbin somewhere between the minimum and maximum expanding diameter to ensure the fixing of the bobbin. A synchronous ring is disposed on the body to enable the balls to move synchronously. A wire spring is disposed on the inner surface of the synchronous ring to provide tension on the ball to ensure the bobbin builds a unit with the synchronous ring and rotates on the body with minimum friction.