Oscillating Tool Dust Extraction Mount With Bayonet Locking
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Solution Overview
Problem
Existing suction devices for oscillating hand-held power tools are cumbersome to attach and lack adaptability, posing risks of detachment and inhalation of dust and chips during woodworking processes.
Innovation Solution
A suction device with a hollow cylindrical fastening section and coding area for secure attachment, a pivotable locking mechanism, adjustable air inlet angle, and a rotatable air outlet with limited rotation to ensure effective dust and chip collection without obstructing the work area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the extraction device is screwed onto the power tool, then the attachment is secure, but the mounting process becomes cumbersome and time-consuming
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a bayonet-style coupling mechanism. The mounting section features a hollow cylinder with coding areas that engage with corresponding features on the power tool's drive shaft, allowing secure attachment through a simple rotational motion rather than threading screws. This substitution maintains attachment reliability while dramatically reducing mounting time and complexity.
2Stability of the object's composition
If the extraction device is fixed in position, then the attachment is stable, but the device cannot be adapted to different working positions and angles
Solution Approach 1:
The patent implements a dynamic mounting system where the extraction device can be rotated around the drive shaft to different angular positions. The bayonet coupling allows the device to be locked at various angles depending on the specific woodworking application, providing both stability when locked and adaptability when repositioning is needed. The coding areas guide the rotation and ensure proper engagement at the desired orientation.
3Ease of operation
If the extraction device can be easily attached, then the ease of operation improves, but the risk of unintentional detachment increases
Solution Approach 1:
The patent employs asymmetric coding areas on the mounting section that create a unique engagement geometry with the drive shaft. This asymmetric design allows the device to be easily attached through a simple push-and-rotate motion, while the specific shape of the coding features ensures that once engaged, the attachment is secure and resistant to unintentional detachment. The asymmetry provides both ease of operation and reliability by ensuring only the correct orientation engages properly.
4Productivity
If the air inlet is fixed at a specific angle, then the dust extraction efficiency is optimized for one position, but the device cannot adapt to different working angles
Solution Approach 1:
The patent designs the air inlet with multi-functionality, allowing it to effectively capture dust and chips regardless of the specific working angle. The air inlet structure and positioning are optimized to maintain effective dust extraction across multiple orientations of the power tool, making the system universally effective for various woodworking applications without requiring angle-specific adjustments.
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
Facilitates easy and secure attachment of the suction device, reduces the risk of detachment, and enhances dust and chip collection efficiency while maintaining clear visibility and safety during woodworking.
Implementation Method 1
a locking mechanism (12) on the mounting section (7), which is pivotably mounted about a pivot axis (14) against the force of a return spring (13)
Implementation Method 2
an air guide channel (4) which is limited at one end by an air inlet (5) and at the other end by an air outlet (6), to which a suction device, in particular a vacuum cleaner, can be detachably attached
Data Source
Figure 1~2
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Figure 4
AI summary
The invention relates to a suction device (1) for an oscillating hand-held power tool (2) equipped with a gear neck (8) for mounting the suction device (1), comprising a base body (3) that can be attached to the gear neck (8) of the hand-held power tool (2) by means of a mounting section (7), and an air guide channel (4) formed in the base body (3), which is bounded at one end by an air inlet (5) and at the other end by an air outlet (6) to which a suction device, in particular a vacuum cleaner, can be detachably attached. The mounting section (7) of the base body (3) is essentially hollow and cylindrical and extends between a first plane (9) and a second plane (10), which are preferably parallel.