Quick-Clamping Device for Angle Grinders
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Solution Overview
Problem
Existing quick-change clamping devices for portable power tools, such as power angle grinders, require tools for mounting and releasing insert tool units, which complicates the process and increases operator effort.
Innovation Solution
A quick-change clamping device with a movably mounted clamping unit and control unit, allowing for tool-free fixing of insert tool units to the output shaft, utilizing pivotable and rotatable clamping elements and a control element that can move the clamping unit between clamping and release positions with minimal operator force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional clamping devices are used, then secure fixation of insert tool units is achieved, but tool-free mounting and release cannot be realized requiring additional tools and increasing operator effort
Solution Approach 1:
The clamping element is designed to be movable relative to the output shaft, transitioning between a clamping position (where it secures the insert tool unit) and a release position (where it allows removal). This dynamic capability enables tool-free operation while maintaining secure fixation when engaged
Solution Approach 2:
A control unit with a control element serves as an intermediary mechanism that actuates the movable clamping element. The control element translates operator input into clamping element movement, enabling tool-free operation without requiring complex direct manipulation of the clamping mechanism
2Ease of operation
If quick-release mechanism is implemented, then operator effort is reduced, but control precision and safety may be compromised
Solution Approach 1:
The movable clamping element design allows the system to maintain secure fixation automatically when in the clamping position without requiring continuous operator intervention. The mechanism self-secures the insert tool unit reliably while enabling easy release through the control unit when needed
Data Source
AI summary
A quick-clamping device for a portable machine tool, in particular for an angle grinder, includes at least one clamping unit and at least one control unit. The clamping unit includes at least one clamping element mounted movably with respect to a movement axis of the clamping unit so that the clamping unit is configured for tool-free fixing of an insertion tool unit to an output shaft of the portable machine tool. The control unit includes at least one movably mounted control element configured to actuate the clamping unit. The control element is mounted at least in a translatory and/or pivotable manner and is configured to transfer the clamping unit from a clamping position into a release position according to a movement of the control element.