Oscillating Tool Clamp Shaft for Secure Clamping and Easy Release
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Solution Overview
Problem
Existing oscillating tools face challenges in securely clamping and efficiently removing tool accessories due to sticking issues, which affect processing operations.
Innovation Solution
The oscillating tool incorporates a spindle with a first inclined face and a clamp shaft with a biasing mechanism, including compression coil springs and balls, to clamp the tool accessory firmly and facilitate easy removal by applying a downward biasing force, ensuring reliable engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the spindle and tool accessory are formed with inclined faces for torque absorption, then torque application is improved, but the tool accessory may stick to the spindle during oscillation
Solution Approach 1:
The biasing part applies a preliminary downward biasing force on the tool accessory in the axial direction of the spindle before oscillation occurs. This preliminary force creates friction between the tool accessory and spindle that counteracts the sticking tendency caused by the inclined faces during oscillating motion, thereby preventing the tool accessory from adhering to the spindle
2Reliability
If the clamp shaft firmly clamps the tool accessory, then clamping reliability is improved, but tool accessory removal becomes difficult
Solution Approach 1:
The clamp shaft is designed to dynamically change its clamping force based on operational needs. During oscillation, the biasing part maintains firm clamping through downward biasing force on the tool accessory. During removal, the clamp shaft can be manually displaced axially to reduce clamping force, allowing easy tool accessory detachment while maintaining reliable clamping during operation
3Reliability
If the biasing part applies downward force on the tool accessory, then sticking is reduced, but the clamp shaft structure becomes more complex
Solution Approach 1:
The biasing part is integrated within the clamp shaft structure, merging the biasing function with the existing clamping mechanism. The biasing part includes elements that work in conjunction with the clamp shaft's inclined faces and clamping surfaces, combining multiple functions into a unified structure rather than adding separate independent components
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
This configuration ensures secure clamping and easy removal of tool accessories, reducing sticking issues and enhancing operational efficiency during processing operations.
Implementation Method 1
the at least one biasing part is configured to always bias the tool accessory downward, while the tool accessory is clamped by the head part and the spindle
Implementation Method 2
The first inclined face is formed on a lower end portion of the spindle, and inclined in a direction crossing the driving axis
Data Source
AI summary
A work tool includes a spindle, a clamp shaft and at least one biasing part. The spindle is configured to be reciprocally rotated within a specified angle range around a driving axis. The spindle has a first inclined face inclined in a direction crossing the driving axis. The clamp shaft includes a shaft part and a head part. The shaft part is configured to be coaxially inserted into the spindle. The head part is formed on a lower end portion of the shaft part and configured to clamp the tool accessory in cooperation with the spindle while a second inclined face of the tool accessory is pressed against the first inclined face. The at least one biasing part is provided in the spindle and configured to always bias the tool accessory downward while the tool accessory is clamped by the head part and the spindle.