Power Tool Clamping Device for Oscillating Working Elements
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Solution Overview
Problem
Existing power tools cannot securely clamp working elements that oscillate, leading to torque mutations and impact issues, and lack the ability to adjust working elements' angles without removing and re-clamping, making operations laborious and time-consuming.
Innovation Solution
A power tool with a clamping device that has a clamping position, rotating position, and release position, featuring a locking assembly with a form-fit structure and a flange member that allows for angular adjustment of the working element without disengagement, ensuring secure clamping even during oscillation and enabling tool-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional clamping device is used to clamp the working element, then the working element can be securely clamped during rotation, but it cannot securely clamp working elements that oscillate back and forth, causing torque mutations and impact issues
Solution Approach 1:
The clamping device transitions from a static clamping structure to a dynamic one where the clamping flange can rotate relative to the driving shaft while maintaining clamping force. The spring member provides continuous elastic pressure that adapts to oscillation movements, allowing the working element to oscillate back and forth without compromising clamping reliability.
Solution Approach 2:
The invention changes the clamping force parameter from a fixed value to a variable value that adapts to oscillation. The spring member's elastic deformation allows the clamping force to dynamically adjust during oscillation, maintaining reliable clamping while accommodating the oscillating motion of the working element.
2Reliability
If the working element is clamped firmly to the driving shaft, then secure operation is achieved, but angular adjustment requires removal and re-clamping, making operations laborious and time consuming
Solution Approach 1:
The clamping device enables dynamic adjustment by allowing the clamping flange to rotate relative to the driving shaft while remaining clamped. The spring member maintains continuous pressure during this rotation, securing the working element at different angular positions without requiring removal and re-clamping, thus reducing adjustment time while maintaining clamping security.
Solution Approach 2:
The clamping device is segmented into independently rotatable components (clamping flange, locking pin) that can adjust angular position while maintaining clamping force. This segmentation allows angular adjustment without complete disassembly, reducing adjustment time while preserving clamping security.
3Adaptability or versatility
If a locking mechanism is added to enable angular adjustment, then adjustment capability is improved, but device complexity increases
Solution Approach 1:
The operating member serves multiple functions: it simultaneously controls the locking pin to enable both angular adjustment and secure locking. This multi-functionality reduces the number of separate components needed, improving angular adjustment capability while minimizing the increase in device complexity.
Solution Approach 2:
The locking mechanism is merged with the existing clamping structure. The locking pin integrates with the clamping flange and operating member, combining angular adjustment and locking functions into a unified system rather than adding separate independent mechanisms, thus improving adaptability with limited complexity increase.
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 allows for quick, reliable, and tool-free clamping of working elements, ensuring firm attachment during oscillation and enabling angular adjustments without removing the element, thus saving time and effort while providing a strong hand feeling during operation.
Implementation Method 1
a spring member for pushing the clamping flange
Implementation Method 2
there is no friction therebetween, so the threaded pin of the clamping flange can be threaded out of the thrust piece without any tools
Data Source
AI summary
A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position.