Pneumatic Hose Fitting for Deformation-Free Nozzle Assembly
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Solution Overview
Problem
The manual attachment of elastic hoses to dimensionally stable nozzles is time-consuming and prone to hose deformation, leading to potential hydraulic leaks, and existing solutions like using dimensionally stable end pieces are costly and involve additional work steps.
Innovation Solution
A method using a hose assembly tool to generate a flow of pressurized gas, reducing the flow cross section to expand the hose end, attaching it to the nozzle without deformation, and then increasing the cross section to secure it, allowing for reliable attachment without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual attachment method is used, then flexibility and simplicity are maintained, but productivity is low and manufacturing precision is poor due to hose deformation
Solution Approach 1:
The patent uses a pneumatic expansion device that introduces compressed air into the hose end to expand it radially, allowing the hose to be fitted onto the nozzle without mechanical deformation. This pneumatic approach replaces manual stretching and positioning, simultaneously improving attachment speed and fitting precision.
Solution Approach 2:
The patent changes the physical state of the hose by temporarily increasing its internal pressure through compressed air, which alters the hose's dimensional parameters (expanding its diameter). This parameter change enables precise fitting during the attachment process, and the hose returns to its original state after attachment, ensuring manufacturing precision while maintaining productivity.
2Manufacturing precision
If dimensionally stable end pieces are used on hoses, then manufacturing precision is improved, but device complexity increases and productivity decreases due to additional work steps
Solution Approach 1:
The patent extracts the dimensional stability requirement from the hose structure itself and provides it temporarily through the pneumatic expansion device during the attachment process. This eliminates the need for permanent dimensionally stable end pieces or connectors, reducing device complexity while maintaining fitting precision through controlled pneumatic expansion.
Solution Approach 2:
The hose itself performs the fitting function through pneumatic expansion without requiring additional connectors or end pieces. The compressed air enables the hose to expand and fit onto the nozzle autonomously, eliminating the need for separate dimensionally stable components and simplifying the overall device structure while maintaining precision.
3Productivity
If hose is expanded by compressed air from nozzle, then productivity is improved, but manufacturing precision deteriorates due to hose deformation and potential leaks
Solution Approach 1:
The patent introduces a hose expansion device as an intermediary between the compressed air source and the hose. This intermediary controls the air delivery to ensure uniform radial expansion of the hose end, preventing deformation and ensuring precise fitting. The mediator device manages the air flow to achieve both high productivity and manufacturing precision simultaneously.
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
Enables reliable and deformation-free attachment of elastic hoses to nozzles, reducing manual labor and avoiding additional cost steps, with the option for manual or automated execution and leak detection through pressure measurement.
Implementation Method 1
reducing the flow cross-section of the hose behind the connection point to generate a dynamic pressure in the hose that expands the hose end
Data Source
AI summary
The present invention relates to a method for fitting an elastic hose onto a dimensionally stable connector, wherein the method comprises the following steps: a) generating a flow of pressurized gas out of the connector; b) bringing the hose end to the connector against the flow direction of the gas out of the connector; and c) reducing the flow cross section of the hose beyond the connection point in order to generate dynamic pressure in the hose, widening the hose end; d) fitting the hose end onto the connector; and e) increasing the flow cross section of the hose beyond the connection point to mount the hose end to the outside of the connector.