Rotating Dust Extraction Connector with Fixed Angular Locking
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Solution Overview
Problem
Existing connection devices for dust removal systems in hand-held power tools allow for unwanted rotation of suction hoses or dust collection containers, leading to contact with workpieces and potential damage during machining operations.
Innovation Solution
A connection device that fixes the outlet and inlet elements in a form-fitting manner, allowing for predetermined rotational positions and preventing unwanted rotation, using latching and screwing mechanisms to secure the components relative to each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the suction hose or dust collection container is allowed to rotate relative to the hand-held power tool, then the connection device provides flexibility and ease of operation, but the suction hose may twist and come into contact with the workpiece causing damage
Solution Approach 1:
The connection device incorporates a rotatable connecting element that allows dynamic adjustment of the angle between the inlet and outlet elements. This enables the suction hose to be positioned at optimal angles during operation while preventing uncontrolled rotation that would cause the hose to contact the workpiece. The rotatable joint provides controlled flexibility rather than rigid fixation.
2Stability of the object's composition
If the dust collection container is firmly clamped to the hand-held power tool, then the container remains stable and does not rotate, but the connection device complexity increases
Solution Approach 1:
The connection device is divided into separate functional elements: an inlet element connected to the power tool, an outlet element connected to the dust collection container, and a rotatable connecting element joining them. This segmentation allows each component to perform its specific function - the inlet element provides stable attachment to the tool, the outlet element connects to the container, and the connecting element provides controlled rotation - without requiring the entire assembly to be overly complex.
3Reliability
If the inlet element and outlet element are fixed in a form-fitting manner, then the angle of rotation is retained and the suction hose does not twist, but the adaptability of the connection device is reduced
Solution Approach 1:
The connecting element is designed to be rotatable relative to both the inlet element and the outlet element, allowing the user to adjust the angle of connection to suit different working conditions. Once positioned, the form-fitting contours prevent unintended rotation. This provides both adaptability during setup and reliability during operation.
Solution Approach 2:
The inlet element and outlet element have asymmetric form-fitting contours that engage in specific angular positions. This asymmetric design allows the elements to be connected at predetermined angles while preventing rotation to other positions, thus retaining the angle of rotation and preventing hose twisting while still allowing for controlled adaptability.
Data Source
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AI summary
The invention relates to a connection device for connecting a dust extraction device, in particular a suction hose (91) or a dust collection container (80), to a hand-held power tool (10) or a vacuum cleaner (90), wherein the connection device (25; 125) has a tubular inlet element (30) and a tubular outlet element (50) which are connected to each other by a connecting element (60). It is provided that the outlet element (50) and the inlet element (30) are rotatable relative to each other, wherein interlocking positive-locking contours (75) are provided between the inlet element (30) and the outlet element (50) for fixing the outlet element (50) and the inlet element (30) in at least two rotational angular positions relative to each other.