Clamping Device Shielding Knob from Substrate Contact
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Solution Overview
Problem
Existing power tools lack a secure and keyless fastening system for non-cranked, flat tool discs that prevents undesired contact between the fastening system's knob and the substrate, leading to potential tool disc tightening or loosening issues during operation.
Innovation Solution
A clamping device with a screw that screws into the power tool's drive spindle, featuring a coupling module with a first flange and internal contour, providing a form-fitting fastening and preventing undesired loosening or tightening by shielding the operating element from the tool disc.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a keyless fastening system is used for flat tool discs, then tool-free fastening is enabled, but undesired contact between the knob and substrate causes tightening or loosening issues
Solution Approach 1:
A shielding element is introduced as an intermediary component between the operating element (knob) and the substrate. This shielding element prevents direct contact while allowing the keyless fastening operation to proceed, thus resolving the contradiction between ease of operation and reliability by mediating the harmful interaction.
2Ease of operation
If the knob is exposed to the tool disc, then keyless operation is possible, but contact with substrate causes unintended tightening or loosening
Solution Approach 1:
The shielding element serves as a protective intermediary that blocks the harmful contact between the knob and substrate while preserving the keyless operational capability. The shielding element is positioned to prevent substrate contact during rotation, eliminating the harmful effect without compromising ease of operation.
3Reliability
If a first flange is added to shield the operating element, then contact prevention is achieved, but device complexity increases
Solution Approach 1:
The shielding element is merged with the existing fastening system components, specifically integrating it with the operating element assembly. This combination approach provides contact prevention functionality while minimizing the increase in device complexity by reusing existing structural elements rather than adding completely separate components.
Data Source
AI summary
A clamping device for fastening a tool disc to a power tool, wherein the clamping device has a screw provided for being screwed into a drive spindle of the power tool in order to fasten the tool disc. The screw is mounted in a coupling module of the clamping device, wherein the coupling module has a first flange and an internal contour, wherein the clamping device gives rise to a form-fitting fastening of the tool disc to the power tool, and wherein the second flange prevents undesired loosening or tightening of the screw. A power tool having a drive spindle, to which a tool disc can be fastened by the proposed clamping device, and to a method for fastening a tool disc to such a power tool.