Vehicle Air Treatment Cartridge Coupling to Prevent Mis-Assembly
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Solution Overview
Problem
In the field of vehicle air treatment systems, particularly for utility vehicles, there is a challenge in ensuring that the correct type of air treatment cartridge is assembled for the intended application, leading to potential technical issues due to mis-assembly or unsuitability of the cartridge, which can result in performance problems and missed maintenance intervals.
Innovation Solution
An air treatment device with a housing structure and cartridge designed to be axially symmetric, featuring an eccentric coupling mechanism and customized thread profiles, bayonet fixing means, and protrusions/recesses to ensure only compatible cartridges are connected, preventing mis-assembly and ensuring correct usage for specific applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard symmetric connection elements are used for cartridges, then manufacturing and assembly are simple, but mis-assembly of wrong cartridge types occurs
Solution Approach 1:
The patent applies asymmetry by providing at least one connection element with an asymmetric basic shape that does not possess rotational symmetry. This asymmetric connection element on the cartridge can only be connected to a correspondingly asymmetric receiving element on the housing structure, preventing mis-assembly of wrong cartridge types while maintaining manufacturing feasibility
Solution Approach 2:
The patent applies local quality by making only specific connection elements asymmetric rather than the entire cartridge structure. The asymmetric feature is localized to the connection region, allowing the rest of the cartridge to maintain standard symmetric design for simplified manufacturing and assembly
2Adaptability or versatility
If multiple cartridge types are provided for different applications, then application-specific performance is improved, but assembly errors increase
Solution Approach 1:
The patent applies feedback by providing visual or tactile indicators on the connection elements that give immediate feedback to the assembler about compatibility. The asymmetric shape itself serves as a feedback mechanism - if the cartridge type is wrong, the asymmetric connection element simply cannot be inserted into the receiving element, preventing assembly errors while maintaining versatility
3Productivity
If maintenance intervals are not monitored, then operational continuity is maintained, but system reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by incorporating maintenance indicators that alert users before maintenance is actually needed. The indicator mechanism is set up in advance during cartridge assembly, allowing users to monitor usage duration and receive early warning that maintenance intervals are approaching, thus maintaining both productivity and reliability
Data Source
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Figure 3A~3B
AI summary
The present invention provides an air treatment device (100) for a vehicle, especially utility vehicle, wherein the air treatment device (100) comprises: a housing structure (102) having a connecting neck portion (104), an air treatment cartridge (108) being constructed to be substantially axially symmetric relative to a central axis (cAx) and being connected or connectable to the housing structure (102), wherein the air treatment cartridge (108) has a coupling neck portion (110) configured to connect or be connected to the connecting neck portion (104) of the housing structure (102), wherein, when the air treatment cartridge (108) is connected to the housing structure (102), the coupling neck portion (110) and the connecting neck portion (104) are arranged to be eccentric relative to the central axis (cAx).