Torque Enhancer Geometry for Stable High-Torque Fastening
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Solution Overview
Problem
Existing fastening devices lack a geometry that effectively balances torque generation with stability and ease of grasping, often leading to issues like cam-out and axial separation during torque application.
Innovation Solution
A torque enhancement device with a geometric configuration featuring bi-symmetric side walls, corner recesses, and notches that enhance torque transmission while maintaining stability, allowing for improved grasping and usage in various applications, including as a tool or fastener.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If standard fastening device geometries are used, then ease of manufacture and integration into existing tooling is maintained, but torque generation capability and stability during torque application deteriorates
Solution Approach 1:
The fastening device employs asymmetric geometry with non-uniform side wall lengths (first side wall longer than second side wall) and strategically positioned corner recesses that break symmetry. This asymmetric configuration creates optimized contact points and force distribution patterns that simultaneously enhance torque generation capability and maintain stability during torque application, resolving the contradiction between these two requirements.
Solution Approach 2:
The device incorporates localized geometric features including corner recesses at specific positions, notches at predetermined locations, and varied side wall lengths. These local quality modifications create specific contact points and stress distribution patterns that enhance torque transmission efficiency while preventing cam-out and axial separation, thereby improving both torque generation and stability without requiring complete geometric redesign.
2Force
If higher torque is generated through increased spin, then fastening capability is improved, but control over torque rotation and measurement precision deteriorates
Solution Approach 1:
The geometric configuration with specific contact points created by corner recesses and notches provides inherent feedback mechanisms that allow for better control and measurement of torque rotation. The defined contact geometry enables predictable force transmission paths, making it easier to monitor and control the torque application process even at higher spin rates, thus maintaining measurement precision while improving fastening capability.
3Reliability
If conventional fastener geometries are used, then ease of operation and grasping is maintained, but reliability under high torque conditions deteriorates due to cam-out and axial separation
Solution Approach 1:
The fastening device geometry is segmented into distinct functional zones including longer and shorter side walls, corner recesses at specific positions, and notches at predetermined locations. This segmentation creates multiple stable contact points that distribute forces more effectively, preventing cam-out and axial separation while maintaining a geometry that is still easy to grasp and operate. The segmented design enhances reliability without sacrificing ease of operation.
Data Source
AI summary
A torque enhancement device having torque enhancement member(s) with each having an exterior (preferably bi-symmetric or essentially bi-symmetric) surface configuration with parallel, longer side walls extending in a Y-axis direction and shorter side walls extending in an X-axis direction and corner recesses positioned between ends of adjacent longer and shorter side walls, and with some embodiments of the invention featuring a torque enhancement device having a hole extending in a Z-axis direction. A fastener assembly is also provided that includes one or more torque enhancement devices as well as methods for utilization of the torque enhancement device or utilization or assemblage of an assembly including a torque enhancement device. The surface configuration includes arrangements where there is a torque differential in one direction or the other as well as arrangements that are adapted to handle both standard fastener configurations and torque enhancement configurations with a common torque enhancement device.