Air Cleaner Housing Twist-Lock Mechanism for Serviceability
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Solution Overview
Problem
Existing air cleaner and crankcase ventilation filter assemblies face challenges in secure and efficient assembly, serviceability, and maintenance due to complex interactions between housing components and filter cartridges, which can lead to difficulties in ensuring a tight seal and easy replacement of filter media.
Innovation Solution
The proposed solution involves a housing assembly with a removable cover that uses a twist-lock mechanism with oblique lugs and a lock mechanism to securely engage and disengage the cover, ensuring a tight seal and easy access for maintenance, featuring a housing body with first and second pluralities of lugs with ramped engagement surfaces and a lock member that prevents reverse rotation, allowing for secure positioning and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a removable cover is used to allow easy access for maintenance, then serviceability is improved, but the risk of leakage or improper sealing increases
Solution Approach 1:
The housing is divided into a housing body and a removable cover that can be separated to access the filter cartridge. The cover includes a seal member that engages with the housing body to maintain sealing during removal and reinstallation operations.
Solution Approach 2:
A seal member is introduced as an intermediary element between the removable cover and the housing body. This seal member includes a sealing surface that contacts the housing body to prevent leakage while allowing the cover to be removed for maintenance.
2Ease of operation
If a simple cover attachment is used for easy removal, then ease of operation is improved, but the security and tight seal of the assembly deteriorates
Solution Approach 1:
The lugs on the cover and housing body are configured with asymmetric ramped engagement surfaces. The ramped surfaces are angled to guide the lugs into proper engagement during assembly while preventing premature disengagement, providing both ease of assembly and secure locking.
Solution Approach 2:
The ramped engagement surfaces of the lugs are designed to automatically align and guide the cover into the correct position during assembly. This preliminary alignment action ensures proper engagement before the final locked position is reached, simplifying the assembly operation while maintaining security.
3Reliability
If complex locking mechanisms are used to ensure secure assembly, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking function is merged with the existing lug structure. The lugs serve dual purposes: providing structural support and enabling the twist-lock mechanism. The lock member is integrated with the cover assembly, combining multiple functions into a single component to reduce overall complexity.
Solution Approach 2:
Instead of using a complex multi-component locking system, the invention uses a simple twist-lock mechanism where the cover is rotated to engage and disengage the lugs. The lock member can be easily inserted and removed to secure or release the cover, providing reliable locking with minimal complexity.
Data Source
AI summary
An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.