Handheld Tool Attachment Anti-Rotation Locking Unit
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Solution Overview
Problem
Existing tool attachments for handheld machine tools have a large overall length, limiting manipulability and precision due to their design.
Innovation Solution
A tool attachment with an anti-rotation locking unit and a fastening unit forming a form-locking connection, where the locking element is situated near the anti-rotation unit, and a control element facilitates self-locking without manual operation of the locking sleeve, reducing overall length and enhancing secure fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locking element is positioned away from the anti-rotation locking unit, then the locking mechanism can be operated separately, but the overall length of the tool attachment increases
Solution Approach 1:
The patent combines the locking element and anti-rotation locking unit into a single integrated fastening system. The locking element is positioned in the vicinity of the anti-rotation locking unit, allowing both functions to be performed by a unified mechanism rather than separate components, thereby reducing the overall length while maintaining operational effectiveness.
Solution Approach 2:
The locking element is nested within the base body structure near the anti-rotation locking unit, with both components sharing the same spatial region. This nesting arrangement allows the locking mechanism to be compact while still enabling the locking sleeve to displace the locking element radially for fastening operations.
2Ease of operation
If the locking element is positioned away from the anti-rotation locking unit, then the locking mechanism can be operated separately, but the manipulability of the tool attachment is limited
Solution Approach 1:
By merging the locking and anti-rotation functions into a single fastening system, the patent improves the manipulability and adaptability of the tool attachment. The integrated design allows the tool to be more versatile and easier to handle in various positions and orientations, while still providing secure fastening through the combined action of the locking element and anti-rotation locking unit.
3Ease of operation
If the locking element is positioned away from the anti-rotation locking unit, then the locking mechanism can be operated separately, but the precision of the tool attachment is insufficient
Solution Approach 1:
The integrated fastening system with the locking element positioned near the anti-rotation locking unit enhances the precision of the tool attachment. By combining both locking functions in one mechanism, the patent ensures more accurate and reliable fastening, reducing play and improving the overall precision of tool operation.
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 provides a robust, secure, and precise fastening system with reduced overall length, allowing for easy attachment and detachment of the tool attachment to the handheld machine tool, enhancing user convenience and tool system stability.
Implementation Method 1
a spring element (244), which acts upon the locking sleeve (240) with spring force into a locking position
Implementation Method 2
The anti-rotation locking unit (220) and the fastening unit (170) are provided to develop a form-locking connection
Data Source
AI summary
In a tool attachment, for fastening to an handheld machine tool equipped with a tool holding fixture, having an output shaft and a base body, which forms an inner cavity and on whose outer circumference an axially displaceable locking sleeve is situated, for releasing at least one associated locking element against a spring force of a spring element, which has a clamping ring, in the inner cavity, a anti-rotation locking unit is configured for the rotationally locked fastening of the base body to a fastening unit associated with the handheld machine tool, the anti-rotation locking unit and the fastening unit having complementary geometric forms, which are configured to engage with each other for the detachable rotationally locked fastening of the base body on the fastening unit; and the at least one associated locking element being situated in the vicinity of the anti-rotation locking unit.