Hand-held Power Tool Connecting Conduit Rotational Securing
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Solution Overview
Problem
Hand-held power tools face challenges in achieving a compact configuration while ensuring safe and precise installation of connecting conduits due to limited space, which can lead to damage and leakage issues.
Innovation Solution
The use of securing means to fix the rotational position of connecting members and the integration of shaped hoses with pre-configured bends and seals, such as nitrile rubber, to ensure proper orientation and alignment of conduits, reducing the risk of damage and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the power tool is configured to be compact, then the overall size is reduced, but the available space for arranging connecting conduits is minimized making installation difficult
Solution Approach 1:
The connecting member is provided with securing means that pre-determine its rotational position in the opening, and the connecting conduit is pre-shaped with predetermined bends and orientations. This preliminary configuration ensures proper installation orientation is achieved automatically during assembly, eliminating the need for complex alignment procedures in the compact space.
Solution Approach 2:
The connecting member features asymmetric securing means including positioning protrusions and corresponding positioning recesses that engage in specific orientations. The connecting conduit is also asymmetrically shaped with predetermined bends that only fit in the correct rotational position, preventing wrong installation in the limited space available.
2Volume of moving object
If the connecting conduit is installed in minimal space, then the compact configuration is maintained, but the conduit may become damaged or misaligned during operation
Solution Approach 1:
The connecting conduit is pre-shaped with predetermined bends and configurations that account for the expected movement and vibration during operation. The connecting member is pre-configured with securing means that lock the conduit in a safe orientation, preventing damage before it can occur during tool operation.
Solution Approach 2:
The securing means on the connecting member actively prevent wrong installation and rotational movement before damage can occur. The asymmetric positioning protrusions and recesses ensure the conduit is locked in the correct orientation, counteracting any tendency toward misalignment or damage during vibration and operation.
3Manufacturing precision
If additional securing components are added to fix the rotational position, then the installation precision is improved, but the device complexity increases
Solution Approach 1:
The securing means are integrated directly into the connecting member and opening structure rather than being separate additional components. The positioning protrusions and recesses are formed as part of the connecting member and opening geometry, combining the securing function with the existing structural elements to avoid increasing overall device complexity.
Solution Approach 2:
The opening serves multiple functions: it provides the connection interface for the connecting conduit and simultaneously incorporates the securing means through its geometric features. The connecting member also serves both as a connection element and as a securing mechanism through its integrated positioning protrusions, reducing the need for separate dedicated securing components.
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
This solution allows for a safe and precise installation of connecting conduits in minimal space, enhancing seal-tightness and preventing damage from vibration, thereby increasing the service life of components like the venting valve.
Implementation Method 1
The seal is comprised in particular of nitrile rubber (NBR) that swells when in contact with fuel
Data Source
AI summary
A hand-held power tool has at least one operating medium tank having at least one opening. At least one connecting conduit is arranged external to the operating medium tank. At least one connecting member is inserted into the opening, wherein the at least one connecting conduit is connected to the at least one connecting member. Securing devices that secure a rotational position of the at least one connecting member in the opening are provided.