Filter Device Trap Space for Assembly Residue Containment
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Solution Overview
Problem
Existing filter devices face issues with residues, such as shavings, formed during the assembly of orifice members, which can impair the filtering function and lead to breakage or clogging, as there is no effective structure to handle these residues.
Innovation Solution
A filter device design that includes an engaging member and a trap member forming a closed trap space to catch residues during assembly, preventing them from entering the fluid passage and compromising the filter's function, with options for the trap member being a second flange or an annular portion, and materials like synthetic resin and metal for the filter and orifice members respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an orifice member is forcibly inserted into the filter body for assembly, then the orifice member is securely fixed in the fluid passage, but residues (shavings) are generated during assembly that can reduce the filter device function
Solution Approach 1:
The invention divides the filter device into functional zones by introducing a trap member that creates a dedicated trap space. This segmentation isolates the assembly area from the fluid passage, containing residues in a specific region while maintaining the integrity of the filtering function in another region.
Solution Approach 2:
The trap member acts as an intermediary structure between the orifice member assembly area and the fluid passage. It mediates the harmful effect of residues by providing a buffer zone (trap space) that prevents direct contact between residues and the filtering components, thus protecting the system while allowing secure orifice member installation.
2Device complexity
If no trap structure is provided during orifice member assembly, then the device structure remains simple, but residues enter the filter device and cause breakage or clogging
Solution Approach 1:
The trap member is pre-installed in the filter body before the orifice member is forcibly inserted. This preliminary action creates the trap space in advance, ensuring that any residues generated during subsequent assembly operations will be automatically contained, preventing reliability issues before they occur.
Solution Approach 2:
The invention converts the harmful residues generated during assembly into a beneficial containment scenario. By providing the trap space, residues that would otherwise cause breakage or clogging are redirected into a designated storage area, transforming a potential failure mode into a controlled condition that does not affect operational reliability.
3Object-generated harmful factors
If the trap space is formed between the engaging member and trap member, then residues are effectively caught, but the space between these components must be precisely controlled
Solution Approach 1:
The trap member is designed with specific local geometric features that create the trap space. By concentrating the precision requirement to the local interface between the trap member and engaging member rather than the entire assembly, the manufacturing precision demand is localized and more manageable, while still achieving effective residue containment in that critical local region.
Data Source
AI summary
A filter device is formed by installing an orifice member to the fluid passage of a filter body and avoids being functionally impaired by residue such as shavings generated during the installing of the orifice member. A filter device is provided with a filter body that has a fluid passage; and an orifice member that is installed in the fluid passage. The orifice member is provided with a body that has an orifice, a first flange that is press-fitted into the large-diameter part of the fluid passage, and a second flange that forms a closed trap space between itself and the first flange. A knurling is provided to the outer peripheral surface of the first flange. A knurling is provided to the outer peripheral surface of the first flange. Shavings formed during the installing of the orifice member to the filter body are captured in the trap space.