Torque-Limiting Maneuvering Flywheel With Belleville Washer
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Solution Overview
Problem
Existing maneuvering and tightening elements face challenges in identifying the maximum allowable torque, leading to potential overload, premature wear, and breakage due to imperceptible deformation of abutment surfaces during the tightening process.
Innovation Solution
A maneuvering flywheel with a cylindrical base and crown, incorporating a Belleville washer and a pin with engagement teeth, limits torque by compressing the washer to disengage the track with spheres once the predetermined torque is reached, ensuring safe operation and preventing unwanted unscrewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the operator forces the tightening element beyond the maximum allowable torque, then the tightening force increases, but the abutment surfaces deform and premature wear and breakage occur
Solution Approach 1:
The Belleville washer is pre-compressed during assembly to establish a predetermined torque limit. This preliminary action sets the maximum allowable torque before actual use, preventing operators from exceeding the safe tightening force that would deform abutment surfaces.
Solution Approach 2:
The Belleville washer acts as an intermediary element between the handle body and the engagement mechanism. It mediates the torque transmission by compressing at the predetermined torque threshold, thereby protecting the abutment surfaces from excessive force while still allowing effective tightening.
2Reliability
If a torque limiting mechanism is added to the maneuvering element, then the risk of overload and wear is reduced, but the device complexity increases
Solution Approach 1:
The torque limiting function is merged into the existing handle body structure by integrating the Belleville washer within the cylindrical base. This combination allows the torque limiting mechanism to work seamlessly with the maneuvering element without requiring separate complex components or assembly procedures.
Solution Approach 2:
The Belleville washer changes its physical parameter (compression) in response to torque application. By selecting washers with specific compression characteristics, the device achieves torque limiting functionality through material parameter selection rather than complex mechanical mechanisms, thereby reducing overall device 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 effectively limits torque to prevent wear and malfunctions, ensuring precise contact and extended product life by disengaging the tightening mechanism at the predetermined torque, while allowing higher torque during unscrewing to prevent unwanted loosening.
Implementation Method 1
incorporating torque limiting means comprising a Belleville washer
Data Source
AI summary
Manoeuvering flywheel of the type consisting of a main flywheel body composed of a cylindrical base and a crown consisting of a regular series of gripping lobes characterised in that the cylindrical base centrally provides a cylindrical cavity, wherein a septum is located which is centrally perforated, perpendicular to the directrices of the cylindrical cavity, and apt to make up two separate chambers, on the lower surface of which a series of engagement teeth is housed.