Filtration Assembly Snap-Fit Engagement Mechanism
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Solution Overview
Problem
Existing filtration assemblies in vehicles face challenges in safely and intuitively connecting filtering cartridges with auxiliary devices, often requiring a trade-off between safety and simplicity for maintenance operations.
Innovation Solution
The filtration assembly employs engagement/disengagement means with axial and rotational configurations, utilizing blocking groups with stems and teeth for secure snap-fit connections, ensuring safe and intuitive operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional connection methods are used between filtering cartridge and auxiliary device, then the connection can be established, but the engagement and disengagement operations become complex and non-intuitive
Solution Approach 1:
The connection mechanism is segmented into distinct functional elements: cartridge members on the filtering cartridge and device members on the auxiliary device. Each member has specific engagement features (protrusions, recesses, blocking groups) that work together to create a modular, easy-to-operate connection system where engagement and disengagement are separated into distinct, intuitive actions.
Solution Approach 2:
The cartridge members and device members are designed with asymmetric geometries including inclined surfaces, blocking groups, and complementary protrusions/recesses. This asymmetry ensures that engagement follows a specific directional sequence (pushing in axial direction then rotating) while disengagement requires the reverse sequence, preventing erroneous operations and making the correct procedure intuitive through tactile feedback.
2Ease of repair
If the filtering cartridge is designed to be easily removable for maintenance, then maintenance operations are simplified, but the risk of mutual disconnection during operation increases
Solution Approach 1:
The connection mechanism transitions from a static fixed connection to a dynamic multi-state system. The cartridge and auxiliary device can be in engaged state (secure connection), disengaged state (for maintenance), or partially engaged state (during operation). The blocking groups and inclined surfaces provide progressive engagement that ensures secure locking once properly connected, while allowing controlled disengagement for maintenance.
Solution Approach 2:
The engagement means act as an intermediary mechanism between the filtering cartridge and auxiliary device. The blocking groups serve as intermediate elements that must be sequentially overcome during engagement (via axial push then rotation) and during disengagement. This intermediary mechanism prevents accidental disconnection while enabling intentional maintenance removal.
3Reliability
If the engagement mechanism uses multiple steps for secure connection, then connection reliability is improved, but the operational simplicity is reduced
Solution Approach 1:
The engagement process is divided into periodic distinct actions: first an axial pushing motion to initial engagement, then a rotational motion to final secure locking. The disengagement follows the reverse periodic sequence. This periodic structure makes each step deliberate and controllable, providing tactile feedback that confirms proper engagement while maintaining operational simplicity through clear, separated motion phases.
Data Source
Figure 1~2a
Figure 2b~2c
Figure 2d~2e
AI summary
The invention is a filtration assembly (900) for a fluid of a vehicle, which extends along an axis (X-X) and comprises a filtering cartridge (1) and an auxiliary device (2). Furthermore, the filtration assembly (900) comprises engagement/disengagement means (3) comprising cartridge members (4) and device members (5) which are configurable in an engagement configuration and a disengagement configuration, respectively. The filtering cartridge (1) comprises, at an axial end, an end plate (10) on which said cartridge members (4) are positioned. The cartridge members (4) comprise at least two blocking groups (40), each comprising a stem (41) and at least one tooth (42) positioned at the axial end of the stem (41) projecting therefrom in a lateral direction defining, with the stem (41), an engagement undercut (43), and the device members (5) comprise at least one housing region (52) and a lug (53). In the engagement configuration, the tooth (42) is housed in a snap-fit manner in the respective housing region (52) specially shaped, and the lug (53) is housed in the undercut (43). Furthermore, the cartridge members (4) and the device members (5) comprise a cartridge edge (48) and a device edge (58) suitable to engage each other in the rotary disengagement action, in which at least one of the cartridge edge (48) and the device edge (58) is shaped thus identifying a ramp. Thereby, in the mutual engagement between the cartridge edge (48) and the device edge (58), the respective blocking group (40) elastically flexes in a radial direction so that the tooth (42) leaves the respective housing region (52).