Modularized quick-release FFU filter screen positioning mechanism

Abstract

The utility model relates to the technical field of filter screen positioning, in particular to a modularized quick-release type FFU filter screen positioning mechanism which comprises a modularized main body frame and an inner frame, the modularized main body frame is of a hollow structure with a hollow-square-shaped cross section formed by extruding aluminum alloy sections, a filter screen is installed above the modularized main body frame, and the inner frame is arranged above the modularized main body frame. Interface grooves are formed in four sides of the inner frame, quick-release unit mounting seats are arranged on four sides of the inner frame, and quick-release locking mechanisms are mounted at four corners of the inner frame. The three-point contact elastic locking mechanism is adopted, compared with a traditional single-point locking mode, FEA analysis and verification show that stress concentration is reduced by 62%, and the problem that local stress is too large is effectively avoided; and due to the innovative design of the modular interface slot, only the damaged unit needs to be replaced when a part is damaged, so that the maintenance cost is greatly reduced by 70%, and the practicability and the economical efficiency of the mechanism are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of filter positioning technology, specifically a modular quick-release FFU filter positioning mechanism. Background Technology

[0002] Currently, the mainstream FFU filter fixing methods on the market are bolt fastening and snap-fit ​​embedding. Although bolt fastening uses four corner bolts to press the filter screen onto the housing frame, it has drawbacks such as requiring special tools for disassembly, taking up to 15-20 minutes for a single maintenance, being prone to stripping threads due to repeated tightening, and uneven stress caused by multiple fastening points leading to inconsistent compression of the frame sealing strip and increased risk of leakage. Snap-fit ​​embedding uses elastic plastic snaps for fixing, but it has disadvantages such as the snaps being prone to plastic deformation after long-term pressure, having a service life of less than 6 months, lacking precise positioning benchmarks, having filter screen installation offset of ±2mm, and the need to replace the entire frame when a local damage occurs due to the integral structure.

[0003] Existing technologies cannot simultaneously meet the requirements of tool-free quick disassembly and assembly, repeatability positioning accuracy <0.5mm, modular replacement design, and uniform compression rate of sealing surface >85%. Therefore, we propose a new modular quick-release FFU filter positioning mechanism. Utility Model Content

[0004] The purpose of this utility model is to provide a modular quick-release FFU filter positioning mechanism to solve the problems mentioned in the background art that the existing technology cannot simultaneously meet the requirements of tool-free quick disassembly and assembly, repeatability positioning accuracy <0.5mm, modular replacement design, and uniform compression rate of sealing surface >85%.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A modular quick-release FFU filter positioning mechanism includes a modular main frame and an inner frame. The modular main frame is a hollow structure with a "U"-shaped cross-section, extruded from aluminum alloy profiles. A filter screen is installed on top of the modular main frame. Interface grooves are provided on the four sides of the inner frame. Quick-release unit mounting seats are provided on the four sides of the inner frame. Quick-release locking mechanisms are installed at the four corners of the inner frame. The quick-release locking mechanism includes a stainless steel elastic buckle, a polyetheretherketone (PEEK) slider, and a stainless steel spring. A stainless steel elastic buckle is engaged at the inner end of the filter screen. A PEEK slider is engaged at one end of the stainless steel elastic buckle. A stainless steel spring is fixed at one end of the quick-release unit mounting seat. A spring preload nut is provided at one end of the stainless steel spring. The PEEK slider is connected to the stainless steel elastic buckle. The modular main frame is a hollow structure with a "U"-shaped cross-section, extruded from 6061-T6 aluminum alloy profiles, with a wall thickness of 3mm. The inner frame has grooves with a depth of 5mm and a tolerance of H7 / g6 on the four sides. Standardized interface slots for compatibility.

[0007] Preferably, the quick-release unit mounting base is connected to the filter screen component via an M6 pre-embedded threaded sleeve.

[0008] Preferably, the inner wall of the inner frame is provided with double V-shaped guide rails on all four sides. The double V-shaped guide rails are parallel to the installation direction of the filter screen. The surface of the double V-shaped guide rails is plated with a hard chrome layer with a thickness of 0.05mm and a hardness of ≥800HV. The guide rails have an inclination angle of 45° and a contact surface roughness of Ra0.8.

[0009] Preferably, the tail locking surface of the stainless steel elastic buckle is connected and fixed to the filter screen.

[0010] Preferably, the double V-shaped guide rail is fixedly installed within the modular main frame and is coordinated with the movement path of the filter screen.

[0011] Preferably, a ball positioning pin is installed above the double V-shaped guide rail, and the ball positioning pin is installed between the double V-shaped guide rail. The diameter tolerance of the ball positioning pin is g6, and it contains a ceramic ball with a diameter of 3mm. The contact stress is ≤500MPa.

[0012] Preferably, a positioning auxiliary mechanism is installed between the double V-shaped guide rail and the filter screen. The positioning auxiliary mechanism includes a small, powerful magnet and a magnetic metal sheet. The small, powerful magnet is fixedly installed on the side of the double V-shaped guide rail, and multiple sets of small, powerful magnets are provided. A magnetic metal sheet is provided on the side of the small, powerful magnet corresponding to the filter screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This modular quick-release FFU filter positioning mechanism, by adopting a three-point contact elastic locking mechanism, reduces stress concentration by 62% compared to the traditional single-point locking method, as verified by FEA analysis, effectively avoiding the problem of excessive local stress; the innovative design of the modular interface groove means that only the damaged unit needs to be replaced when a component is damaged, which greatly reduces maintenance costs by 70%, and greatly improves the practicality and economy of the mechanism.

[0015] 2. This modular quick-release FFU filter positioning mechanism significantly reduces the disassembly and assembly time from 15 minutes to 18 seconds in actual operation, greatly improving work efficiency. After 500 disassembly and assembly tests, the positioning accuracy has consistently remained at a high level of ≤0.25mm, according to coordinate measuring machine data. Aerosol detection method shows that the sealing strip compression uniformity reaches 92.3%, ensuring good sealing performance and comprehensively improving the overall performance of the mechanism.

[0016] 3. This modular quick-release FFU filter positioning mechanism reduces maintenance labor costs by 80% due to its ease of operation, which can be completed independently by a single technician. In the production process, the increased standardization of components improves mold reuse, thereby reducing production costs by 45%. This brings significant economic benefits from both maintenance and production aspects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the inner frame of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the double V-shaped guide rail of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall structure of the stainless steel elastic buckle of this utility model;

[0021] Figure 5 This is a schematic diagram of the overall structure of the quick-release unit mounting base of this utility model.

[0022] In the diagram: 1. Modular main frame; 2. Inner frame; 3. Filter screen; 4. Interface groove; 5. Quick-release unit mounting base; 6. Quick-release locking mechanism; 601. Stainless steel elastic buckle; 602. Polyetheretherketone slider; 603. Stainless steel spring; 604. Spring preload nut; 7. Double V-shaped guide rail; 8. Ball bearing positioning pin; 9. Positioning auxiliary mechanism; 901. Small strong magnet; 902. Magnetic metal sheet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 As shown, this utility model provides a technical solution:

[0025] A modular quick-release FFU filter positioning mechanism includes a modular main frame 1 and an inner frame 2. The modular main frame 1 is a hollow structure with a "U"-shaped cross-section, extruded from aluminum alloy profiles. A filter 3 is installed on top of the modular main frame 1. The inner frame 2 has interface grooves 4 on its four sides and quick-release unit mounting seats 5 on its four sides. Quick-release locking mechanisms 6 are installed at the four corners of the inner frame 2. The quick-release locking mechanism 6 includes a stainless steel elastic buckle 601, a polyetheretherketone (PEEK) slider 602, and a stainless steel spring 603. The inner end of the filter 3 is engaged with the stainless steel elastic buckle 601, and one end of the stainless steel elastic buckle 601 is engaged with the PEEK slider 602. A stainless steel spring 603 is fixedly installed on one end of the quick-release unit mounting seat 5, and a spring preload nut 604 is installed on one end of the stainless steel spring 603. By adopting a three-point contact elastic locking mechanism, compared with the traditional single-point locking method, the FFU... Analysis and verification show that stress concentration was reduced by 62%, effectively avoiding the problem of excessive local stress. The innovative design of the modular interface groove 4 means that only the damaged unit needs to be replaced when a component is damaged, which greatly reduces maintenance costs by 70% and significantly improves the practicality and economy of the mechanism. The polyetheretherketone slider 602 is connected to the stainless steel elastic buckle 601. Pressing the slider can move the stainless steel elastic buckle 601 to lock the filter screen 3.

[0026] In this embodiment, preferably, the quick-release unit mounting base 5 is connected to the filter screen 3 component through the M pre-embedded threaded sleeve, and is used to fix the quick-release locking mechanism 6 and other components to the four corners of the modular main frame 1.

[0027] In this embodiment, preferably, double V-shaped guide rails 7 are installed on the four sides of the inner wall of the inner frame 2. The double V-shaped guide rails 7 are parallel to the installation direction of the filter screen 3. By contacting the filter screen 3, when the filter screen 3 is pushed into the frame along the guide rail, the ball positioning pin 8 can automatically correct the positional deviation of the filter screen 3.

[0028] In this embodiment, preferably, the tail locking surface of the stainless steel elastic buckle 601 is connected and fixed to the filter screen 3. The relatively large contact area between the tail plane locking surface and the filter screen 3 provides a stable locking force, which firmly fixes the filter screen 3 in the modular main frame 1.

[0029] In this embodiment, preferably, the double V-shaped guide rail 7 is fixedly installed inside the modular main frame 1 and cooperates with the moving path of the filter screen 3, thereby providing guidance for the installation of the filter screen 3.

[0030] In this embodiment, preferably, a ball positioning pin 8 is installed above the double V-shaped guide rail 7, and the ball positioning pin 8 is installed between the double V-shaped guide rails 7. Since the double V-shaped guide rail 7 itself has good guiding properties, the ball positioning pin 8 can effectively restrict the movement of the object in the direction.

[0031] In this embodiment, preferably, a positioning auxiliary mechanism 9 is installed between the double V-shaped guide rail 7 and the filter screen 3. The positioning auxiliary mechanism 9 includes a small strong magnet 901 and a magnetic metal sheet 902. The small strong magnet 901 is fixedly installed on the side of the double V-shaped guide rail, and multiple sets of small strong magnets 901 are provided. The small strong magnet 901 is provided on the side of the filter screen 3 corresponding to the side of the filter screen 3. When the filter screen 3 approaches the double V-shaped guide rail, the magnet and the magnetic metal sheet 902 attract each other, which helps the filter screen 3 to be quickly and accurately positioned on the guide rail, improving the efficiency and accuracy of the filter screen 3 installation. At the same time, it can also play a certain role in preventing displacement and stabilizing the filter screen 3 when it is working.

[0032] In this embodiment, a modular quick-release FFU filter positioning mechanism is used such that the filter 3 is pushed into the frame along the guide rail, and the position deviation is automatically corrected by the ball positioning pin 8. After it is in place, press the slider until a "click" sound indicates that the locking is complete. When disassembling, pull the operating handle outward, and the spring releases the buckle to disengage from the locking surface, thereby realizing quick installation and disassembly.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A modular quick release FFU screen positioning mechanism comprising a modular main body frame (1) and an inner frame (2), characterized in that, The modular main frame (1) is extruded from aluminum alloy profiles into a hollow structure with a "return" - shaped cross - section. A filter screen (3) is installed above the modular main frame (1). Interface grooves (4) are provided on the four sides of the inner frame (2). Quick - release unit mounting seats (5) are provided on the four sides of the inner frame (2). Quick - release locking mechanisms (6) are installed at the four corners of the inner frame (2). The quick - release locking mechanism (6) includes a stainless - steel elastic buckle (601), a polyether - ether - ketone slider (602), and a stainless - steel spring (603). The inner end of the filter screen (3) is snap - fitted with the stainless - steel elastic buckle (601). One end of the stainless - steel elastic buckle (601) is snap - fitted with the polyether - ether - ketone slider (602). One end of the stainless - steel spring (603) is fixedly arranged on the quick - release unit mounting seat (5). A spring pre - tightening nut (604) is arranged at one end of the stainless - steel spring (603). The polyether - ether - ketone slider (602) is connected to the stainless - steel elastic buckle (601).

2. A modular quick release FFU screen positioning mechanism according to claim 1, characterized in that: The quick - release unit mounting seat (5) is connected to the filter screen (3) component through an M embedded threaded sleeve.

3. A modular quick release FFU screen positioning mechanism according to claim 1, wherein: Double V - shaped guide rails (7) are installed on the four sides of the inner wall of the inner frame (2). The double V - shaped guide rails (7) are parallel to the installation direction of the filter screen (3).

4. The modular quick-release FFU screen positioning mechanism of claim 1, wherein: The tail locking surface of the stainless - steel elastic buckle (601) is connected and fixed to the filter screen (3).

5. A modular quick release FFU screen (3) positioning mechanism according to claim 3, characterized in that: The double V - shaped guide rails (7) are fixedly installed in the modular main frame (1) and are matched with the moving path of the filter screen (3).

6. A modular quick release FFU screen positioning mechanism according to claim 3, wherein: A ball - locating pin (8) is installed above the double V - shaped guide rails (7), and the ball - locating pin (8) is installed between the double V - shaped guide rails (7).

7. A modular quick-release FFU filter positioning mechanism according to claim 3, characterized in that: A positioning auxiliary mechanism (9) is installed between the double V - shaped guide rails (7) and the filter screen (3). The positioning auxiliary mechanism (9) includes a small powerful magnet (901) and a magnetic metal sheet (902). The small powerful magnet (901) is fixedly installed on the side of the double V - shaped guide rail, and multiple groups of small powerful magnets (901) are provided. A magnetic metal sheet (902) is arranged on the side of the small powerful magnet (901) corresponding to the filter screen (3).

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