Liquid Filter Radial Nose Inclined Plane Positioning
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Solution Overview
Problem
Existing liquid filters for internal combustion engines face challenges in ensuring reliable and space-efficient automatic engagement of the blocking element with the outlet during installation of the ring filter insert, often requiring operator intervention and occupying valuable space in the filter housing.
Innovation Solution
The implementation of inclined planes and radially protruding noses as positioning means on the inner and outer circumferences of the filter housing and ring filter insert, allowing for automatic alignment and engagement of the blocking element with the outlet without increasing the filter's size, enabling free space for other components and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ramp is provided on the bottom of the filter housing to guide the blocking element into the outlet, then automatic positioning is achieved, but the bottom space is occupied and prevents arrangement of other components
Solution Approach 1:
The positioning function is moved from the bottom surface (2D plane) to the inner circumference (cylindrical surface), utilizing the vertical wall space of the filter housing instead of the bottom surface. This dimensional transition allows the ramp to be positioned on the inner circumference rather than occupying bottom space, enabling coexistence with other bottom-mounted components.
Solution Approach 2:
The filter housing inner surface is segmented into functional zones: the inner circumference contains positioning features (ramp and groove) while the bottom surface remains free for other components. This spatial segmentation separates the positioning function from the bottom space, resolving the conflict between automatic positioning and component arrangement flexibility.
2Ease of operation
If guide means are provided separately from press-lock elements, then positioning and closing functions are separated, but the overall size of the filter insert is markedly extended
Solution Approach 1:
The positioning function (ramp) and the structural support function are merged into a single integrated component on the inner circumference. The ramp serves both as a positioning guide and as part of the structural housing, eliminating the need for separate guide means that would extend the filter insert size.
Solution Approach 2:
The inner circumference structure serves multiple functions: it provides the ramp for automatic positioning, supports the outlet structure, and maintains housing integrity. This multi-functionality eliminates the need for dedicated separate positioning components, preventing size extension of the filter insert.
3Extent of automation
If spring means are provided in the filter housing for positioning, then automatic positioning is achieved, but the filter housing structure becomes more complex
Solution Approach 1:
The blocking element performs self-positioning through the geometric interaction between the ramp and groove features during insertion. This passive geometric guidance eliminates the need for active spring means or motorized positioning systems, achieving automation without adding structural complexity.
Solution Approach 2:
The complex spring-based mechanical positioning system is replaced with simple geometric ramp-groove features. The positioning function is achieved through the shape and orientation of these features rather than through elastic forces, significantly simplifying the filter housing structure while maintaining automatic positioning capability.
Data Source
AI summary
A liquid filter including a filter housing, a ring filter insert and a cover. The housing bottom contains an outlet for emptying the housing when the filter insert is removed. The filter insert includes a filter material body surrounded by front panels. A blocking element for the outlet is arranged on one front panel, and positioning elements are provided on the filter insert and on the housing. The positioning elements include an inclined plane and an engaging radially protruding nose. The inclined plane is arranged on one and the nose is arranged on the other of the filter housing part and the ring filter insert. When the ring filter insert is rotated relative to the filter housing, the inclined plane and the nose are moved in relation to each other such that they slide along each other and engage the blocking element with the outlet.