Multi-Grip Socket Bit Segmented Design for Damaged Fasteners
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Solution Overview
Problem
Existing fastener tools often slip on worn, corroded, or damaged fasteners, leading to damage during tightening or loosening, and require unnecessary tools like bolt extractors for removal.
Innovation Solution
A multidirectional driver bit with segmented portions that grip the fastener head, allowing efficient torque transfer in both clockwise and counterclockwise directions, compatible with various torque tools, and eliminating the need for bolt extractors by using a series of engagement features and a dual-sided design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional driver bits are used on worn, corroded, or damaged fasteners, then the tool can be simple and easy to manufacture, but slippage occurs leading to fastener damage
Solution Approach 1:
The driver bit is divided into multiple segmented portions (first portion, second portion, third portion) with different engagement features. Each segment has specific geometry designed to bite into and grip the fastener head, allowing the bit to maintain reliable grip even on damaged fasteners without requiring overly complex construction
2Force
If higher torque is applied to damaged fasteners with conventional bits, then the tightening or loosening effectiveness improves, but the fastener head or tool suffers damage due to slippage
Solution Approach 1:
Different portions of the driver bit have different local geometries optimized for specific functions. The first portion has engagement features for initial grip, the second portion has features for maintaining grip under torque, and the third portion has features for preventing slippage. This localized optimization allows high torque application without damaging the fastener or tool
3Adaptability or versatility
If bolt extractors are used to remove damaged fasteners, then removal capability is achieved, but additional tools and drilling operations are required increasing process complexity
Solution Approach 1:
The driver bit is designed with multiple engagement features and geometries that enable it to perform multiple functions: tightening intact fasteners, maintaining grip on worn fasteners, and removing damaged fasteners. This multi-functionality eliminates the need for separate bolt extractors and drilling operations, reducing the required toolset while maintaining full capability
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 prevents slippage and damage to fasteners, enabling higher torque application without damaging the fastener or tool, and allows for efficient tightening and loosening in both directions without the need for additional tools.
Implementation Method 1
The design uses a series of segmented portions that bite into the head of the fastener and allow for efficient torque transfer between the driving bit and the head portion of the fastener
Data Source
AI summary
A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance and positioned offset from the second lateral edge by a second distance.