Fluid Treatment Unit Bayonet Connection for Space-Saving Exchange
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Solution Overview
Problem
Existing treatment devices with exchangeable units face challenges in enabling a simple and space-efficient exchange mechanism, particularly in filtration systems for liquid fluids like fuel and oil in internal combustion engines.
Innovation Solution
A treatment device with a detachable bayonet-type connection system allows for a plug-in/rotation movement, utilizing complementary functional elements with perpendicular support regions and a pretension element to ensure secure and space-efficient attachment of the treatment unit to the connection head, enhancing force transmission and reducing mechanical load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachable bayonet-type connection device is used with complementary functional elements including assembly ramps and support regions, then the ease of operation for exchanging treatment units is improved, but the device complexity increases due to the additional functional elements and precise geometric requirements
Solution Approach 1:
The connection device is segmented into distinct functional elements: assembly ramps for guiding insertion, support regions for load bearing, and lock elements for securing. This segmentation allows each element to perform its specific function efficiently while enabling modular design and manufacturing.
Solution Approach 2:
The complementary functional elements act as intermediaries between the treatment unit and the connection head. The assembly ramps mediate the insertion process, the support regions mediate force transmission, and the lock elements mediate the locking action, thereby simplifying the overall connection operation.
2Stability of the object's composition
If the support regions are positioned perpendicular to the connection axis and stacked on top of each other in the connection end position, then the stability and force transmission are improved, but the length of the connection device in axial direction increases
Solution Approach 1:
The support regions are oriented perpendicular to the connection axis, transitioning the force transmission from an axial arrangement to a radial/circumferential arrangement. This dimensional change allows multiple support regions to be stacked in the circumferential direction rather than extending axially, thereby improving stability without proportionally increasing axial length.
Solution Approach 2:
Multiple support regions are merged into a compact stacked arrangement in the connection end position. By combining the support functions of multiple regions in a space-efficient configuration, the connection achieves high stability with minimized axial footprint.
3Reliability
If complementary functional elements with precise geometric configurations are used, then the reliability of the connection is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The functional elements employ asymmetric geometric configurations that are optimized for their specific functions. The assembly ramps have asymmetric profiles for unidirectional insertion guidance, the support regions have asymmetric arrangements for optimal load distribution, and the lock elements have asymmetric shapes for secure engagement. This asymmetry enhances reliability while allowing for practical manufacturing tolerances.
Data Source
AI summary
A fluid treatment device has an exchangeable treatment unit and a connection head. A bayonet-type connection device connects connection head and treatment unit to each other by a plug-in/rotation movement about a connection axis of the treatment device and is provided with a housing connection part and a head connection part that operatively engage each other to form a connection of the bayonet-type connection device. Housing connection part and head connection part each have a mutually complementary functional element extending circumferentially about the connection axis and operatively connectable to each other. One functional element has an assembly ramp passing into a first support region perpendicular to the connection axis. The other functional element has a slide region adjoined by a second support region perpendicular to the connection axis. In connection end position, first and second support regions are positioned on top of each other relative to the connection axis.