Retractable Non-Marring Cover for Socket Driving Tool
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Solution Overview
Problem
In vehicles with lug nut recesses, the process of threading lug nuts onto lugs using sockets often results in potential marring contact due to axial misalignment, and existing tools may cause damage to wheels or lug nuts, especially when using hard materials.
Innovation Solution
The development of socket-based driving tools with retractable non-marring covers that extend to cover the lug nut seats before threading and retract to facilitate alignment and prevent marring, featuring a spring-loaded mechanism to ensure axial alignment and rotation without causing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sockets are used to thread lug nuts onto lugs inside lug nut recesses, then the threading function is achieved, but marring contact occurs due to axial misalignment
Solution Approach 1:
A non-marring cover made of soft material (rubber, plastic, or foam) is introduced as an intermediary between the socket and the wheel surface. This cover prevents direct contact between the hard socket and the wheel, thereby eliminating marring while allowing the threading function to proceed uninterrupted.
Solution Approach 2:
The cover is pre-installed on the socket before the threading operation begins. This preliminary protective measure ensures that the wheel surface is protected from potential misalignment damage before the actual threading action occurs, allowing operators to work more confidently without precise alignment concerns.
2Object-affected harmful factors
If covers are added to prevent marring, then protection is improved, but device complexity increases
Solution Approach 1:
The cover is designed as a thin, flexible shell that conforms to the socket's outer shape. This flexible design provides effective protection against marring while adding minimal bulk and complexity to the tool. The thin-walled structure allows the cover to be easily manufactured and attached without significantly increasing the overall tool complexity.
3Measurement precision
If the cover is made retractable, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The cover is designed with retractable capability through spring-loaded or telescopic mechanisms that allow it to dynamically adjust its position. During approach, the cover extends to provide protection; during threading, it retracts to clear the lug nut recess. This dynamic behavior enables both protection and precise alignment without requiring complex active control systems.
Solution Approach 2:
The retractable cover mechanism is designed to operate automatically based on the tool's insertion depth or operational state. Spring-loaded designs use mechanical energy storage and release to automatically extend and retract the cover, eliminating the need for external actuators or complex control systems, thereby reducing overall device complexity while maintaining alignment precision.
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 tools effectively prevent marring contact between the sockets, lug nuts, and wheels by ensuring proper alignment and using non-marring materials for the covers, allowing safe and secure threading of lug nuts onto lugs without damaging the wheel or lug nut recesses.
Implementation Method 1
at least one spring engaged between the cover and the setoff. The at least one spring biases the cover against the setoff for the axial extension
Data Source
AI summary
A driving tool includes an elongate socket body, and a non-marring cover around the socket body. The socket body includes a socket compatible with lug nuts, and a driver adaptor behind the socket. The cover is supported on the socket body for axial extension and axial retraction ahead of the socket.