Yoke Accessory Tool for Oscillating Power Tools
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Solution Overview
Problem
Oscillating power tools are limited in performing intricate cutting and sanding operations due to their rigid one-piece construction and high-frequency oscillating drive motion, which restricts the use of thin, flexible work elements like wires or blades.
Innovation Solution
A yoke accessory tool with spring-loaded bracket arms that can be manually pivoted to securely hold and drive thin, longitudinal workpieces, such as wires or blades, by interlocking with the tool holder's drive structure, allowing for tensioning and flexible positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid one-piece construction is used for the accessory tool, then the connection between the tool holder and accessory tool is secure and rigid, but the ability to perform intricate cutting and sanding operations is limited
Solution Approach 1:
The accessory tool is divided into two separate arms (first arm and second arm) that are spaced apart from each other, allowing independent positioning and movement. This segmentation enables the holding structures at the distal ends to accommodate thin, flexible work elements while maintaining secure connection through the drive structures at the proximal ends.
Solution Approach 2:
The spring component provides dynamic flexibility to the accessory tool, allowing the two arms to move relative to each other and adapt to the oscillating motion of the tool holder. This dynamic structure enables the tool to perform intricate operations while maintaining stable connection through the oscillating drive structures.
2Productivity
If high-frequency oscillating drive motion is used, then the power tool achieves effective cutting and sanding, but thin, flexible work elements cannot be properly tensioned and positioned
Solution Approach 1:
The spring component and spaced-apart arm structure create a dynamic system that can accommodate high-frequency oscillations while maintaining proper tension on thin, flexible work elements. The flexibility allows the work elements to be properly positioned and tensioned despite the rapid oscillating motion.
Solution Approach 2:
The oscillating tool changes the motion parameter from continuous rotation to high-frequency oscillation, and the accessory tool is designed to accommodate this by using flexible connection points at the distal ends that can handle the oscillating motion while maintaining work element tension.
3Reliability
If the tool holder and accessory tool are rigidly connected, then slippage and relative movement are prevented, but the tool becomes too rigid for intricate work requiring flexible work elements
Solution Approach 1:
The connection is segmented into rigid proximal ends with drive structures for reliable connection to the tool holder, and flexible distal ends with holding structures for accommodating thin, flexible work elements. This segmentation allows the connection to be reliable at the drive interface while flexible at the work interface.
Solution Approach 2:
Different parts of the accessory tool have different mechanical properties: the proximal ends have rigid drive structures for reliable connection, while the distal ends have flexible holding structures for intricate work. This local differentiation of quality allows the tool to simultaneously achieve connection reliability and operational flexibility.
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
Enables handheld oscillating power tools to perform intricate cutting, sanding, and shaping operations effectively by securely retaining and driving thin workpieces, overcoming the limitations of rigid constructions and high-frequency oscillations.
Implementation Method 1
a spring component and has a first arm and a second arm attached to the spring component
Data Source
AI summary
An accessory tool is configured to be coupled to a power tool having a tool drive structure. The accessory tool includes a spring component and has a first arm and a second arm attached to the spring component. The first arm includes (i) a first proximal end portion defining a first accessory drive structure that is configured to mate with a first portion of the tool drive structure, and (ii) a first distal end portion having a first holding structure. The second arm is spaced apart from the first arm and includes (i) a second proximal end portion defining a second accessory drive structure that is configured to mate with a second portion of the tool drive structure, and (ii) a second distal end portion having a second holding structure.