Secure Tool Attachment for Hand-Held Machine Tools
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Summary
Problems
Existing tool attachments for hand-held machine tools can automatically detach due to vibrations, leading to potential damage and user injury, as the bayonet connection is not secure enough to prevent unintended disengagement during operation.
Innovation solutions
A tool attachment with a locking unit featuring a rotatable locking body and a resilient locking member that prevents rotation from the locked to the unlocked position, utilizing a set of locking teeth and an actuating element to ensure secure engagement and prevent automatic detachment, combined with a blocking member for additional stability.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a bayonet connection is used for fastening the tool attachment to the hand-held machine tool, then the locking mechanism is simple and easy to operate, but the connection may come undone automatically due to vibrations during operation
Why choose this principle:
The locking member is designed to proactively counteract the harmful effect of vibrations before they can cause detachment. The resilient locking portion continuously applies a blocking force in the direction opposite to potential displacement, preventing the bayonet connection from disengaging during vibratory operation of the hand-held machine tool.
Principle concept:
If a bayonet connection is used for fastening the tool attachment to the hand-held machine tool, then the locking mechanism is simple and easy to operate, but the connection may come undone automatically due to vibrations during operation
Why choose this principle:
The locking member utilizes elastic deformation as a key parameter change mechanism. By designing the locking portion with resilient properties, it can dynamically adjust its blocking force based on the intensity of vibrations, maintaining reliable engagement while accommodating operational variations without requiring additional complex mechanisms.
Application Domain
Data Source
AI summary:
A tool attachment with a locking unit featuring a rotatable locking body and a resilient locking member that prevents rotation from the locked to the unlocked position, utilizing a set of locking teeth and an actuating element to ensure secure engagement and prevent automatic detachment, combined with a blocking member for additional stability.
Abstract
In a tool attachment for fastening to a fastening interface of a hand-held machine tool, having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body, and a first rotational position of the locking body being associated with the unlocked state and a second rotational position of the locking body being associated with the locked state, the locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.