Quick-Change Coupling for Spray Applicator with Bayonet Lock
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Solution Overview
Problem
Existing quick-change couplings for spray applicators are complex, heavy, and require regular maintenance to prevent fluid leaks and ensure proper operation of power cylinders.
Innovation Solution
A quick-change coupling design featuring a coupling housing that can be fastened to a spray applicator holder and a connection block that can be detachably connected to the spray head, allowing for easy installation and removal of lines, and incorporating features like a bayonet lock, anti-twist device, and strain relief device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex coupling system with power cylinders and sealing points is used, then the connection is secure, but the device becomes heavy and requires regular maintenance
Solution Approach 1:
The coupling system is divided into separate components: a coupling housing with bayonet lock mechanism and a connection block with integrated sealing. This segmentation eliminates the need for complex power cylinders while maintaining secure connection through the bayonet lock's mechanical engagement features.
Solution Approach 2:
The sealing function is extracted from the power cylinder assembly and integrated directly into the connection block. This eliminates the separate sealing point between coupling pieces and removes the need for power cylinders, reducing complexity while maintaining connection security.
2Reliability
If a complex coupling system with power cylinders is used, then the connection is secure, but the device becomes heavy
Solution Approach 1:
The power cylinders are completely removed from the design. Connection security is achieved through the bayonet lock mechanism with its locking lugs and engagement features, eliminating the need for heavy cylindrical actuators while maintaining reliable detachment and attachment capabilities.
3Reliability
If traditional coupling designs are used, then connections are secure, but accessibility to line connections is poor
Solution Approach 1:
The line connections are arranged in a radial pattern around the connection block, allowing access from multiple directions. This dimensional arrangement improves accessibility compared to linear arrangements, enabling operators to connect and disconnect lines more easily while maintaining secure connections through the bayonet lock mechanism.
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
A quick-change coupling for a spray applicator for detachably connecting a spray head to a spray applicator holder, comprising a coupling housing (5) that can be fastened to the spray applicator holder (6) and that has an upstream opening (5.1) for leading out lines (8). A connection block (3) that can be fastened to the spray head (2) is also provided. The connection block (3) can be connected to the coupling housing (5) by means of a detachable connection and has line connections (11) to which the lines (8) that protrude through the upstream opening (5.1) of the coupling housing (5) can be fastened. The connection block (3) and the coupling housing (5) are designed such that the connection block (3) together with the lines (8) on the downstream side (5.7) of the coupling housing (5) can be at least partially pulled out of the coupling housing (5).