Fluid Filter End Plate Torque Locking Mechanism
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Solution Overview
Problem
Existing hydraulic spin-on fluid filters face challenges in torsionally locking the end plate to the canister, particularly during installation and removal, which affects torque transfer and fluid port functionality.
Innovation Solution
The design incorporates an end plate with radial notches and a locking portion on the canister's side wall, allowing for improved torque transfer through a locking engagement mechanism, enhancing the structural integrity and sealing between the end plate and canister.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the end plate is connected directly to the canister without a separate seaming lid, then the number of parts is reduced, but torque transfer during installation and removal becomes problematic
Solution Approach 1:
The invention segments the torque transfer function by introducing radial notches in the end plate that engage with a locking portion on the canister. This segmentation allows the end plate to be directly connected to the canister (reducing part count) while still providing effective torque transfer through the notched engagement features.
2Ease of manufacture
If the end plate is directly attached to the canister, then manufacturing is simplified, but torsional locking mechanism becomes more challenging
Solution Approach 1:
The invention introduces asymmetric radial notches in the end plate that correspond to a locking portion on the canister. This asymmetric geometry provides reliable torsional locking while maintaining direct attachment between the end plate and canister, simplifying the manufacturing process compared to using separate seaming lids.
3Ease of operation
If radial notches are formed in the end plate, then torque transfer is improved, but structural strength of the end plate may be compromised
Solution Approach 1:
The radial notches are strategically positioned and dimensioned to provide adequate torque transfer while minimizing impact on the overall structural strength of the end plate. The notches are located in regions where they can engage with the canister's locking portion without creating weak points that would compromise the end plate's ability to withstand high pressure.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A fluid filter includes a base plate, a canister, and filtering media contained in the canister for filtering fluid from an inlet port to an outlet port. Notches are formed into an outer periphery of the base plate. An annular bead of the canister side wall is partially formed into the notches to provide a torque locking mechanism between the base plate and the canister. The terminating lip portion of the canister is wrapped around the outer face of the base plate and formed into an annular trough to directly secure the base plate to the canister. The annular trough includes a diverging outer wall that provides a narrow contact interface between the terminating lip portion and the retention corner of the base plate to thereby reduce moment loads induced therebetween as a result of high fluid pressures in the filter.