Filter Housing Spring Loading Play Compensation
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Solution Overview
Problem
Existing filter devices face challenges in securely receiving and closing the filter element within the housing without play, while ensuring reliable filtration and compensating for component tolerances.
Innovation Solution
A filter device is designed with a spring element that allows axial movement between the filter head and housing, engaging form-fit elements to clamp the filter element in place, providing both play compensation and axial support, and utilizing a central tube for stability and force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter element is received in the housing without play, then the filtration reliability is improved, but the assembly complexity increases due to the need for precise positioning and locking mechanisms
Solution Approach 1:
The filter element is designed with axial play (movability) in the housing, allowing it to dynamically adjust its position. The spring element provides continuous axial loading to maintain sealing contact, compensating for tolerances and ensuring reliable filtration without requiring complex rigid positioning mechanisms.
Solution Approach 2:
The invention changes the parameter of axial positioning from fixed to variable by introducing play and spring loading. The filter element can move axially within a defined range, and the spring force adjusts to maintain optimal sealing pressure, simplifying assembly while ensuring reliability.
2Reliability
If the housing is closed off with form-fit elements engaging each other, then the connection reliability is improved, but the ease of assembly deteriorates due to the need to overcome spring force during closing
Solution Approach 1:
The closing mechanism utilizes dynamic spring loading where the spring force must be overcome during assembly. The bayonet closure with form-fit elements provides reliable angular locking, while the spring element continuously applies axial force to maintain sealing, balancing connection reliability with manageable assembly effort.
3Manufacturing precision
If the spring element axially supports the filter element, then the play compensation is improved, but the force required to close the housing increases
Solution Approach 1:
The spring element provides dynamic axial support to the filter element, automatically compensating for manufacturing tolerances and play. During assembly, the spring force is temporarily overcome to achieve the closed position with form-fit engagement, after which the spring maintains optimal sealing pressure without requiring additional closing force.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures secure, play-free reception of the filter element, compensates for component tolerances, and provides a reliable sealing action, enhancing the stability and sealing force of the filter device during operation.
Implementation Method 1
a spring element for supporting the filter element, wherein the filter head has at least one form-fit element having correlated therewith a corresponding form-fit element on the filter housing
Implementation Method 2
the filter head and the filter housing for reaching a closed position, in which the form-fit elements on filter head and on filter housing engage each other, are movable relative to each other axially against the force of the spring element
Data Source
AI summary
A filter device has a cup-shaped filter housing and a filter element disposed in the filter housing. A filter head is connectable to the filter housing and forms a cover for the filter housing. A spring element is provided that is acting on the filter element. The filter head has at least one first form-fit element. The filter housing has at least one second form-fit element for interacting with the at least one first form-fit element. The spring element is arranged such that the filter head and the filter housing for reaching a closed position, in which the at least one first form-fit element and the at least one second form-fit element engage each other, are movable relative to each other axially against the force of the spring element. The spring element clamps the filter element axially between filter head and filter housing in the closed position.