Flexible Shaft Coupling for Angular Misalignment Compensation
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Summary
Problems
Standard flexible shaft couplings are limited in compensating for axial and angular misalignments, particularly moderate angular misalignments, which can cause tumbling movements that damage the rubber flexible annular body and require costly spring steel membranes for adequate compensation.
Innovation solutions
A flexible shaft coupling design incorporating a membrane-type coupling disk between the elastomeric ring and bolt fastener, with axially shiftable stems and a stiffening ring, allows for effective absorption of dynamic loads and compensation of moderate angular misalignments, maintaining a simple and cost-efficient construction while preventing buckling and torque transmission.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a standard flexible shaft coupling with a rubber annular body and bolt fastener is used, then the coupling is simple and cost-efficient, but it can only compensate for small angular misalignments and the tumbling movements damage the rubber core
Why choose this principle:
A membrane-type coupling disk is introduced as an intermediary element between the elastomeric ring and the bolt fastener. This thin metal membrane absorbs the tumbling movements caused by angular misalignments through its flexibility, preventing direct transmission of damaging forces to the rubber core while maintaining the simple and cost-efficient construction of the overall coupling assembly
Principle concept:
If a standard flexible shaft coupling with a rubber annular body and bolt fastener is used, then the coupling is simple and cost-efficient, but it can only compensate for small angular misalignments and the tumbling movements damage the rubber core
Why choose this principle:
The coupling system combines two different material properties: the elastomeric ring provides torsional and radial flexibility, while the thin metal membrane disk provides angular flexibility. By changing the physical state and properties of different components (rubber vs. metal), the system can handle both small and moderate angular misalignments without damaging the rubber core
Application Domain
Data Source
AI summary:
A flexible shaft coupling design incorporating a membrane-type coupling disk between the elastomeric ring and bolt fastener, with axially shiftable stems and a stiffening ring, allows for effective absorption of dynamic loads and compensation of moderate angular misalignments, maintaining a simple and cost-efficient construction while preventing buckling and torque transmission.
Abstract
A coupling for transmitting torque between a driving element and a driven element, one of which is rotatable about an axis an formed with an annular array or mounting holes centered on the axis, has an elastomeric ring centered on the axis and having a dished face concave toward and directed axially at one of the elements and an opposite generally planar face directed axially at the other of the elements. Respective face plates conform and are vulcanized to the faces. Formations serve for connecting the face plate of the planar face directly to the other element. An annular and thin coupling disk centered on the axis has an outer periphery and an inner periphery and an inner face turned toward the elastomeric ring and an outer face turned away therefrom. Bolts secure the disk outer periphery directly to an outer edge of the face plate of the dished face.