Suction hose connecting piece
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Solution Overview
Problem
Existing suction hose connecting pieces are not sufficiently resistant to high loads applied in the pulling direction, particularly when connected to hard suction hoses from machine tools, due to inadequate longitudinal snap-locking engagement.
Innovation Solution
Incorporating rotational form-fit contours on the plug section of the connecting piece, which can engage with corresponding mating contours through rotational movement, providing a more secure hold than traditional longitudinal snap-locking and allowing for easier connection and disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If longitudinal snap-locking engagement is used to connect the plug section, then the connection is easy to establish and release, but the connection is not sufficiently resistant to high loads in the pulling direction
Solution Approach 1:
The patent introduces a rotational form-fit engagement mechanism that adds a rotational dimension to the connection process. The plug section features a rotational form-fit contour that engages with a corresponding mating contour on the machine tool connection, requiring a quarter-turn motion to establish the connection. This rotational mechanism provides superior resistance to pulling loads compared to simple longitudinal snap-locking, while still maintaining ease of operation through the intuitive turn-to-connect motion.
2Ease of operation
If the plug section is made elastic to facilitate connection to hard suction hose connections, then connection is easier, but the longitudinal snap-locking engagement becomes less resistant to loading
Solution Approach 1:
The patent segments the connection functions into two distinct mechanisms: the plug section itself remains elastic for ease of insertion, while the rotational form-fit contour (separate from the snap-locking mechanism) provides the load-bearing engagement. This segmentation allows the elastic plug section to facilitate easy connection to hard suction hose connections, while the rigid rotational engagement features provide the necessary strength and load resistance independently.
3Ease of manufacture
If traditional longitudinal snap-locking engagement is used, then the connecting piece can be easily assembled, but the connection may be released under high load in the plugging axis direction
Solution Approach 1:
The patent incorporates preliminary action by designing the rotational form-fit contour and longitudinal latch contour to work together in a predetermined sequence. The elastic plug section is inserted first, followed by a quarter-turn rotation that simultaneously engages both the rotational form-fit engagement and the longitudinal snap-locking mechanism. This preliminary sequencing ensures that both easy assembly and high reliability under load are achieved through coordinated engagement of multiple mechanisms.
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 rotational form-fit connection ensures a secure and stable attachment of the suction hose connecting pieces, even under high loads, while maintaining ease of assembly and disassembly.
Implementation Method 1
at least one rotational form-fit contour is arranged on the plug section in order to create a form-fit connection with a rotational form-fit mating contour of the mating connecting piece
Implementation Method 2
The material of the plug section is elastic or elastically yielding, as a result of which on the one hand the longitudinal snap-locking engagement is, advantageously, easier to establish or release
Implementation Method 3
For example, a frictional connection between the material of the plug section, which is relatively soft, and the mating connecting piece ensures an optimally secure connection with the mating connecting piece
Data Source
AI summary
A suction hose connecting piece for a suction hose for producing a flow connection from a machine tool to a vacuum cleaner, the connecting piece including a tubular body with a circumferential wall that delimits a flow channel, and a plug section which is arranged on the tubular body for the purpose of producing a plug connection with a mating connecting piece, it being possible to plug the connecting piece and mating connecting piece one onto the other along a longitudinal axis of the plug section, a longitudinal latch contour being arranged on the plug section, counteracting release of the mating connecting piece from the connecting piece relative to the longitudinal axis, and engaging with a longitudinal mating latch contour of the mating connecting piece when the mating connecting piece is plugged onto the connecting piece, along the longitudinal axis of the plug section.