Filter Assembly Locking Mechanism Prevents Missing Insert
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Solution Overview
Problem
Existing filter assemblies for motor vehicles do not prevent inadvertent operation when a filter insert is missing, leading to the possibility of contaminated oil passing into the vehicle's systems.
Innovation Solution
A filter assembly design that incorporates a locking element which ensures the housing cover can only be assembled if a filter insert is present, utilizing a mechanical or electromechanical locking mechanism that transitions between a blocking and release position based on the presence of the filter insert, preventing assembly without it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter housing is designed with a simple screw connection between housing cover and housing head, then the ease of assembly and disassembly is improved, but the reliability is worsened due to the possibility of inadvertent operation when filter insert is missing
Solution Approach 1:
The blocking element is positioned in advance in a blocking position that prevents assembly of the housing cover when the filter insert is missing. This preliminary positioning of the blocking element ensures that the harmful effect (inadvertent operation) cannot occur before the correct filter insert is installed.
Solution Approach 2:
The blocking element acts as an intermediary component between the housing cover and housing head. It mediates the assembly process by physically preventing the housing cover from being connected to the housing head when the filter insert is absent, thus eliminating the possibility of inadvertent operation while maintaining normal assembly functionality when the filter insert is present.
2Reliability
If a locking element with blocking element is added to prevent assembly without filter insert, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The blocking element is merged with the locking element, which is in turn integrated into the existing screw connection structure. This merging approach allows the reliability function to be achieved without adding separate, independent components, thereby minimizing the increase in device complexity while still preventing inadvertent operation.
Solution Approach 2:
The locking element serves multiple functions: it provides the blocking action to prevent assembly when the filter insert is missing, and it also serves as part of the normal assembly and disassembly mechanism when the filter insert is present. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Data Source
AI summary
A filter assembly for filtering a liquid or gaseous medium includes a filter housing for receiving an exchangeable filter insert. The filter housing has a housing head and a housing cover that can be removably connected to the housing head by means of a connecting element. The connecting element interacts with a locking element associated with the housing head so that, for the purpose of assembly, the housing cover can be connected to the housing head only if the filter insert is located in the filter housing.