Grinding Disc Quick-Release Clamping for Tool-Free Wheel Changes
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Solution Overview
Problem
Existing grinding means devices for portable machine tools require tools for fixing and removing grinding wheels, which complicates the process and reduces operational convenience.
Innovation Solution
A grinding means device with a securing unit that allows tool-free axial fixation of the grinding wheel on the machine tool, using a form-fitting and/or force-fitting connection with a quick-release clamping device, enabling easy attachment and detachment without screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tool-free quick-release clamping device is used for axial fixation, then ease of operation is improved, but device complexity increases due to the need for form-fitting connections and movable hook jaws
Solution Approach 1:
The securing unit is designed to automatically engage with the movable hook jaw through a form-fitting connection when the receiving unit is mounted on the output unit. The securing unit itself performs the fixation function without requiring external tools, as it can be manually operated to engage and disengage the hook jaw, making the system self-sufficient for the fixation task.
Solution Approach 2:
The quick-release clamping device incorporates a movable hook jaw that can transition between locked and unlocked positions. This dynamic element allows the securing unit to engage and disengage quickly by moving the hook jaw along its guide path, enabling tool-free operation while maintaining secure fixation during use.
2Ease of operation
If thread-free fixation is implemented, then ease of operation is improved, but reliability may worsen due to dependence on form-fitting and force-fitting connections
Solution Approach 1:
The connection system combines form-fitting and force-fitting elements to create a composite fixation mechanism. The securing unit features both geometric interlocking (form-fitting) with the hook jaw and elastic deformation (force-fitting) through its spring element, creating a reliable connection that compensates for tolerances and ensures secure fixation without threads.
Solution Approach 2:
The securing unit utilizes elastic deformation as a key parameter change mechanism. The spring element can be compressed to overcome the elastic resistance of the force-fitting connection during mounting, then maintains constant elastic pressure to hold the form-fitting connection securely in place, providing reliable fixation through controlled parameter changes.
Data Source
AI summary
A grinding-means device, in particular a grinding-disc device or backup-pad device, for arranging at least one grinding means, in particular at least one grinding wheel, on a portable power tool, in particular a grinding machine, includes at least one receiving unit, in particular a grinding disc or backup pad, which is fixable in a thread-free manner on an output unit of the tool and on which at least one grinding means is arranged. The grinding-means device includes at least one securing unit formed separately from the receiving unit and configured to axially fix the receiving unit and/or the grinding means to the output unit of the tool in a tool-free manner, and/or at least to axially fix the grinding means to the receiving unit in a tool-free manner.