Novel movable cutter edge fixing structure

Abstract

The utility model discloses a novel movable knife edge fixing structure, and relates to the technical field of FFU movable knife edge fixing, the novel movable knife edge fixing structure comprises a fan frame, the periphery of the fan frame is provided with side plates, and one side of each side plate is provided with a knife edge; the guide groove is formed in the side surface of the side plate, a sprouting step is formed and is higher than the thickness of the cutter edge, and a rivet is arranged at one end of the guide groove; and the limiting frame is arranged on one side of the guide groove, the limiting frame comprises a limiting plate and a positioning seat, the positioning seat and the limiting plate are welded and fixed, and mounting grooves are formed in the two sides of the knife edge. However, in the production, assembly and transportation processes, the self-tapping screw is easy to loosen and fall off, so that the cutter edge is unstable, the installation of the FFU and the filter is influenced, and effective positioning cannot be formed.

Description

Technical Field

[0001] The utility model relates to the technical field of FFU movable knife edge fixing, in particular to a novel movable knife edge fixing structure. Background Art

[0002] FFU fans are widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms and local Class 100 applications;

[0003] For example, the Chinese patent (FFU fan filter unit) with publication number CN115788945A: includes a fan body and a filter, the fan body is connected to the filter, the top surface of the fan body is provided with an air inlet, and flanges are respectively provided at both ends of the fan body along the first direction, the top surfaces of the two flanges are flush and both are higher than the top surface of the fan body, the two flanges and the top surface of the fan body are surrounded by a limiting groove, and a first sealing strip is arranged inside the limiting groove for sealing the air inlet after the FFU fan filter unit is installed, the thickness of the first sealing strip is greater than the distance between the top surface of the flange and the top surface of the fan body, and the deformation of the first sealing strip can be controlled, thereby solving the problem that the deformation of the first sealing strip cannot be controlled during installation, and avoiding the failure of the first sealing strip after excessive compression, thereby improving the sealing effect, reducing the use cost, and increasing the service life of the FFU fan filter unit.

[0004] However, the existing FFU movable knife edge fixing structure usually adopts the self-tapping method. Although this structure is simple and easy, the self-tapping is easy to loosen and fall off during the production, assembly and transportation process, resulting in unstable knife edge, which in turn affects the installation of FFU and filter and cannot form effective positioning; therefore, it does not meet the existing needs. We propose a new movable knife edge fixing structure. Utility Model Content

[0005] The purpose of the utility model is to provide a novel movable knife edge fixing structure to solve the problem that the existing FFU movable knife edge fixing structure proposed in the above background technology usually adopts a self-tapping method. Although this structure is simple and easy to use, the self-tapping screws are easy to loosen and fall off during the production, assembly and transportation process, resulting in unstable knife edges, which in turn affects the installation of the FFU and the filter and cannot form effective positioning.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel movable knife edge fixing structure, comprising: a fan frame, the fan frame is provided with side panels on all four sides, and a knife edge is provided on one side of the side panel;

[0007] Also includes:

[0008] A guide groove is arranged on the side surface of the side plate and forms a sprouting step higher than the thickness of the knife edge, and a rivet is arranged at one end of the guide groove;

[0009] The limiting frame is arranged on one side of the guide groove, and the limiting frame comprises a limiting plate and a positioning seat, and the positioning seat is fixed to the limiting plate by welding.

[0010] Preferably, mounting grooves are provided on both sides of the knife edge, and the mounting grooves penetrate the knife edge, and the knife edge is sleeved on the outside of the guide groove through the mounting grooves.

[0011] Preferably, one end of the rivet passes through the guide groove to extrude and fix the knife edge, and one knife edge corresponds to two guide grooves and two rivets.

[0012] Preferably, a through hole is provided at one end of the limiting plate, and the through hole passes through the limiting plate and the positioning seat, a single-head fastener is provided at one end of the through hole, and one end of the single-head fastener passes through the through hole and is threadedly fixed to the side plate.

[0013] Preferably, a bolt hole is provided at the connection between the single-head fastener and the side plate, and the single-head fastener is threadedly connected to the bolt hole.

[0014] Preferably, the rear surface of the other end of the limiting plate is provided with anti-slip textures, and the anti-slip textures and the limiting plate are an integrated structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a guide groove on the outer wall of the side plate, aligns the installation groove of the knife edge with the guide groove and inserts it, fixes it with rivets, and tightens the rivets, thereby forming a stable sprouting structure. This connection method has higher connection strength and stability, can effectively prevent the knife edge from loosening and falling off, and improves production assembly efficiency and yield rate. One end of the single-head fastener passes through the through hole and is threadedly fixed with the bolt hole of the side plate. The single-head fastener is not tightened first, and one end of the limit frame rotates along the single-head fastener and stops after rotating to the front end of the knife edge. Then the single-head fastener is tightened, thereby clamping the knife edge, further improving the stability of the knife edge fixation, and solving the problem that the existing FFU movable knife edge fixing structure usually adopts the self-tapping method. Although this structure is simple and easy, the self-tapping thread is easy to loosen and fall off during production, assembly and transportation, resulting in unstable knife edge, which in turn affects the installation of FFU and filter, and cannot form effective positioning. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the side plate and knife edge separation structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the limit frame structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the rear surface structure of the limiting frame of the utility model;

[0021] In the figure: 1. Fan frame; 2. Side panel; 3. Knife edge; 4. Mounting slot; 5. Rivet; 6. Limiting frame; 7. Guide slot; 8. Bolt hole; 9. Limiting plate; 10. Single-head fastener; 11. Positioning seat; 12. Through hole; 13. Anti-slip pattern. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: a novel movable knife edge fixing structure, comprising: a fan frame 1, side panels 2 are arranged around the fan frame 1, and a knife edge 3 is arranged on one side of the side panel 2;

[0024] Also includes:

[0025] A guide groove 7 is provided on the side surface of the side plate 2 and forms a sprouting step higher than the thickness of the knife edge 3. A rivet 5 is provided at one end of the guide groove 7;

[0026] The limit frame 6 is arranged on one side of the guide groove 7. The limit frame 6 includes a limit plate 9 and a positioning seat 11, and the positioning seat 11 is welded and fixed to the limit plate 9. Installation grooves 4 are arranged on both sides of the knife edge 3, and the installation grooves 4 pass through the knife edge 3. The knife edge 3 is sleeved on the outside of the guide groove 7 through the installation groove 4. One end of the rivet 5 passes through the guide groove 7 to extrude and fix the knife edge 3, and one knife edge 3 corresponds to two guide grooves 7 and two rivets 5.

[0027] Align the mounting groove 4 of the knife edge 3 with the guide groove 7 and insert it, then insert the rivet 5 along the guide groove 7, and tighten the rivet 5 to form a stable sprouting structure. This connection method has higher connection strength and stability, can effectively prevent the knife edge 3 from loosening and falling off, and improve production assembly efficiency and yield rate.

[0028] See also Figure 1 , 2, 3, 4, a through hole 12 is provided at one end of the limiting plate 9, and the through hole 12 passes through the limiting plate 9 and the positioning seat 11, a single-head fastener 10 is provided at one end of the through hole 12, and one end of the single-head fastener 10 passes through the through hole 12 and is threadedly fixed to the side plate 2, one end of the single-head fastener 10 passes through the through hole 12 and is threadedly fixed to the bolt hole 8 of the side plate 2, a bolt hole 8 is provided at the connection between the single-head fastener 10 and the side plate 2, and the single-head fastener 10 is threadedly connected to the bolt hole 8, the single-head fastener 10 is not tightened first, one end of the limiting frame 6 rotates along the single-head fastener 10, stops after rotating to the front end of the knife edge 3, and then the single-head fastener 10 is tightened, thereby clamping the knife edge 3, further improving the stability of the fixation of the knife edge 3.

[0029] See also Figure 4 The rear surface of the other end of the limiting plate 9 is provided with anti-skid patterns 13, and the anti-skid patterns 13 and the limiting plate 9 are an integrated structure. The limiting plate 9 contacts the surface of the knife edge 3 through the anti-skid patterns 13, thereby improving the protection and thus improving the connection stability.

[0030] Working principle: When in use, align the mounting groove 4 of the knife edge 3 with the guide groove 7 and insert it, then insert the rivet 5 along the guide groove 7, and tighten the rivet 5 to form a stable sprouting structure. This connection method has higher connection strength and stability, can effectively prevent the knife edge 3 from loosening and falling off, and improve production assembly efficiency and yield rate. One end of the single-head fastener 10 passes through the through hole 12 and is threadedly fixed with the bolt hole 8 of the side panel 2. The single-head fastener 10 is not tightened first. One end of the limit frame 6 rotates along the single-head fastener 10 and stops after rotating to the front end of the knife edge 3. Then the single-head fastener 10 is tightened, thereby clamping the knife edge 3 and further improving the stability of the fixation of the knife edge 3.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A novel movable knife edge fixing structure, comprising a fan frame (1), wherein the fan frame (1) is provided with side panels (2) on all four sides, and a knife edge (3) is provided on one side of the side panel (2); Features: Also includes: A guide groove (7) is provided on the side surface of the side plate (2) and forms a sprouting step higher than the thickness of the knife edge (3); a rivet (5) is provided at one end of the guide groove (7); A limiting frame (6) is arranged on one side of the guide groove (7); the limiting frame (6) comprises a limiting plate (9) and a positioning seat (11); and the positioning seat (11) is fixed to the limiting plate (9) by welding.

2. The novel movable knife edge fixing structure according to claim 1 is characterized in that: Mounting grooves (4) are provided on both sides of the knife edge (3), and the mounting grooves (4) penetrate the knife edge (3). The knife edge (3) is sleeved on the outside of the guide groove (7) through the mounting grooves (4).

3. The novel movable knife edge fixing structure according to claim 1 is characterized in that: One end of the rivet (5) passes through the guide groove (7) to squeeze and fix the knife edge (3), and one knife edge (3) corresponds to two guide grooves (7) and two rivets (5).

4. The novel movable knife edge fixing structure according to claim 1 is characterized in that: One end of the limit plate (9) is provided with a through hole (12), and the through hole (12) passes through the limit plate (9) and the positioning seat (11); one end of the through hole (12) is provided with a single-head fastener (10), and one end of the single-head fastener (10) passes through the through hole (12) and is threadedly fixed to the side plate (2).

5. The novel movable knife edge fixing structure according to claim 4 is characterized in that: A bolt hole (8) is provided at the connection between the single-head fastener (10) and the side plate (2), and the single-head fastener (10) is threadedly connected to the bolt hole (8).

6. The novel movable knife edge fixing structure according to claim 1 is characterized in that: The rear surface of the other end of the limiting plate (9) is provided with an anti-skid pattern (13), and the anti-skid pattern (13) and the limiting plate (9) are an integral structure.

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