Power Tool Torque Transfer Pin for Low-Wobble Socket Alignment
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Solution Overview
Problem
Torque transferring devices for power tools, such as sockets and extensions, face issues with wobbling during rotation, which complicates positioning and is particularly problematic in automated tightening operations, as existing solutions either fail to provide sufficient guiding or increase the device's height.
Innovation Solution
A torque transferring device with a compact design that incorporates a pin extending into a center hole of the power tool output shaft, utilizing a conical head portion to ensure accurate rotation and featuring magnets for secure engagement, along with an outer sleeve and inner insulating elements for operator protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a larger diameter guide structure is added before the square on the socket, then guiding and positioning are improved, but device height increases
Solution Approach 1:
The pin is nested within the square recess of the socket body, with the pin extending through the socket wall into the tool output shaft. This nesting arrangement allows the guiding function to be integrated within the existing socket structure without adding external height, as the pin utilizes the internal space of the square recess.
Solution Approach 2:
Instead of adding guiding structure in the vertical dimension (which会增加 height), the solution moves the guiding function to the horizontal dimension by implementing the pin extending radially from the socket wall into the tool output shaft. This dimensional shift provides effective guiding while maintaining compact vertical profile.
2Stability of the object's composition
If traditional socket design is used without pin extension, then device complexity is low, but wobbling during rotation occurs
Solution Approach 1:
The pin acts as an intermediary element between the socket and the tool output shaft, providing guiding and positioning functionality. By introducing this intermediate component that extends into the tool output, the socket achieves stable rotation without requiring complex internal guiding mechanisms or external attachments.
Solution Approach 2:
The guiding function is extracted from the main socket body and implemented as a separate pin element that extends into the tool output. This extraction allows the guiding function to be achieved with minimal additional complexity, as the pin is a simple cylindrical or conical element rather than a complex mechanism.
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 reduces wobbling and circular run-out, enhances positioning accuracy, and maintains a compact size, making it suitable for both automated and manual power tool operations.
Implementation Method 1
wherein the pin comprises a body portion and a head portion, wherein the head portion is adapted to, in use, extend into the correspondingly shaped hole in the power tool output
Implementation Method 2
featuring magnets for secure engagement
Data Source
Figure 1a~1b
Figure 2
AI summary
The present specification relates to a torque transferring device (1) for power tools, comprising a first portion (10) comprising a first engaging structure (13) arranged at a front end (10a) of the first portion and adapted to engage a corresponding mating structure to transfer torque thereto, and a second portion (20) comprising a second engaging structure (22) for connection to the output shaft (OS) of a power tool arranged at a rear end portion (20b) of the second portion, wherein the second engaging portion comprises an open cavity (11) adapted to receive the output shaft of a power tool. The device further comprising a pin (40) arranged at least partly in the open cavity, wherein the pin is arranged to extend in an axial direction and further arranged to, in use, engage a hole (H) formed in the power tool output shaft.