Grating fixing structure convenient to disassemble

By designing the anti-rotation positioning structure and shading mechanism of the first U-shaped frame and the second U-shaped frame, the inconvenience of disassembly and assembly of the grille and space occupation are solved, and the convenient operation and efficient disassembly and assembly of the grille in a narrow space are achieved.

CN120270394APending Publication Date: 2025-07-08JIANGSU DAYANG MARINE EQUIP CO LTD
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Patent Information

Application Number
CN202510553462.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-29
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

The existing grille is inconvenient to disassemble and install and occupies a large space during opening, which limits its use and operation in a narrow space.

Method used

Using a structural design including the first U-shaped frame and the second U-shaped frame, through an anti-turn positioning structure and a shading mechanism, the grille and U-shaped frame are allowed to rotate and translate in a specific position, reduce space occupation, and achieve stable positioning through magnetic suction pieces and limit blocks, simplifying the disassembly and assembly process.

Benefits of technology

It realizes convenient disassembly and assembly of the grille in a narrow space, reduces the space occupation during opening, and improves the scope of application and disassembly and assembly efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of grating fixing, in particular to a grating fixing structure convenient to disassemble, which comprises a first U-shaped frame and a second U-shaped frame, the bottom of the second U-shaped frame is in contact with the bottom of the inner wall of the first U-shaped frame, and the inner walls of the two sides of the second U-shaped frame are respectively provided with a mounting groove matched with a grating. The top end of the first U-shaped frame is provided with two shielding mechanisms used for shielding the mounting groove, and the first U-shaped frame is provided with an anti-rotation positioning structure used for limiting the position of the second U-shaped frame. An avoiding hole is formed in the bottom of the inner wall of the first U-shaped frame, a first rotating shaft matched with the avoiding hole is fixedly connected to the bottom of the second U-shaped frame, and the first rotating shaft penetrates through the avoiding hole; the first U-shaped frame, the second U-shaped frame and the grating can be conveniently arranged in a narrow space, the application range is widened, meanwhile, the grating can be conveniently disassembled from the second U-shaped frame, and the disassembling and assembling efficiency is improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of grille fixing, and particularly relates to a grille fixing structure that is convenient for disassembly. Background Art

[0002] The movable grille (also known as a detachable grille or a movable grille) in a ship is a grille structure that can be flexibly installed, disassembled, or adjusted in position, and is usually used in areas that require frequent maintenance, cleaning, or temporary layout changes. On the basis of retaining the functions of an ordinary grille, its design adds convenience and adaptability.

[0003] However, it is worth considering that the grille is generally fixed to the mounting frame by bolts, and it is relatively inconvenient to disassemble and assemble the grille. One end of the mounting frame is rotatably connected to the mounting position. During the opening process of the mounting frame and the grille, the rotation radius of the mounting frame and the grille is the length of the mounting frame, and a large amount of usable space needs to be occupied during the opening process of the grille and the mounting frame, which has certain limitations.

[0004] Therefore, in order to solve the above problems, the emergence of a related facility that more meets the usage requirements is needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a grille fixing structure that is convenient for disassembly, so as to solve the problems that it is relatively inconvenient to disassemble and assemble the grille, and a large amount of usable space needs to be occupied during the opening process of the grille and the mounting frame.

[0006] Based on the above purpose, the present invention provides a grille fixing structure that is convenient for disassembly, including a first U-shaped frame and a second U-shaped frame. The bottom of the second U-shaped frame is in contact with the bottom inner wall of the first U-shaped frame. Installation grooves adapted to the grille are respectively provided on the inner walls of both sides of the second U-shaped frame. Two shielding mechanisms for shielding the installation grooves are installed at the top end of the first U-shaped frame. The first U-shaped frame is provided with an anti-rotation positioning structure for limiting the position of the second U-shaped frame; An avoidance hole is provided at the bottom inner wall of the first U-shaped frame. A first rotating shaft adapted to the avoidance hole is fixedly connected to the bottom of the second U-shaped frame. The first rotating shaft penetrates through the avoidance hole. A support plate is fixedly connected to the bottom of the first U-shaped frame. A limiting hole and a circular hole are respectively provided at the top of the support plate, and the inner wall of one side of the limiting hole is communicated with the inner wall of the circular hole. A sliding block located in the circular hole is fixedly connected to the bottom end of the first rotating shaft, and arc-shaped surfaces adapted to the circular hole are respectively provided at both ends of the sliding block.

[0007] Optionally, the anti-rotation positioning structure includes a rotating plate disposed above the support plate. One end of the rotating plate is fixedly connected to a second baffle adapted to the second U-shaped frame. The top end of the first U-shaped frame is provided with a rotating mechanism adapted to the rotating plate. One side of the first U-shaped frame away from the rotating plate is fixedly connected to a support portion. A second rotating shaft penetrates through the support portion. Both ends of the second rotating shaft are respectively fixedly connected to a first baffle, and the adjacent surfaces of the two first baffles are respectively in contact with both sides of the second U-shaped frame. The first U-shaped frame is provided with a magnetic attraction member adapted to the first baffle.

[0008] Optionally, the magnetic attraction member includes a first iron plate fixedly installed on the first baffle. A first magnet block is in contact with the bottom of the first iron plate, and the first magnet block is fixedly connected to the first U-shaped frame.

[0009] Optionally, the rotating mechanism includes a third rotating shaft fixedly installed at one end of the rotating plate away from the second baffle. Both ends of the third rotating shaft are respectively rotatably connected to a side plate, and the side plate is fixedly connected to the first U-shaped frame.

[0010] Optionally, a second iron plate is fixedly connected to the rotating plate. A second magnet block is in contact with the side of the second iron plate facing the third rotating shaft. The bottom of the second magnet block is fixedly connected to a limiting block, and the bottom end of the limiting block penetrates through the rotating plate.

[0011] Optionally, the shielding mechanism includes two fixing blocks fixedly installed on the top of the first U-shaped frame. A chute is formed on the fixing block. Two retaining blocks adapted to the installation groove are in contact with the top of the first U-shaped frame, and the retaining block penetrates through the corresponding chute. The fixing block is provided with a locking unit adapted to the retaining block.

[0012] Optionally, the locking unit includes a fixing disk disposed above the fixing block. A positioning column is fixedly connected to the bottom of the fixing disk. A positioning groove is formed on the top of the retaining block, and the bottom end of the positioning column is located in the positioning groove. A tension spring is sleeved outside the positioning column, and both ends of the tension spring are respectively fixedly connected to the bottom of the fixing disk and the top of the fixing block.

[0013] Optionally, two receiving grooves are formed on both inner walls of the chute. Two anti-detachment blocks adapted to the receiving groove are fixedly connected to both sides of the retaining block.

[0014] Optionally, mounting frames are respectively in contact with both sides of the first U-shaped frame. A lead screw is fixedly connected inside the mounting frame. A support block is sleeved outside the lead screw, and the support block is fixedly connected to the first U-shaped frame. Two nuts are sleeved outside the lead screw, and the adjacent two nuts are respectively located above and below the support block.

[0015] Advantages of the present invention: When it is necessary to drive the grille and the second U-shaped frame to open, the limitation on the position of the grille is released through the anti-rotation positioning structure, so that the grille, the second U-shaped frame, the first rotating shaft and the slider can rotate relative to the first U-shaped frame. The staff drives the second U-shaped frame and the grille to rotate, and the slider rotates in the round hole. When the grille and the second U-shaped frame rotate by 90 degrees and the arc surface of the slider faces the limiting hole, at this time, the staff drives the grille, the second U-shaped frame, the first rotating shaft and the slider to translate, so that the slider slides into the limiting hole, and the first rotating shaft slides relative to the avoidance hole. The position of the slider is limited by the inner walls on both sides of the limiting hole to prevent the slider from rotating and shaking relative to the limiting hole. When the grille is translated to the preset position, the position of the grille is limited through the anti-rotation positioning structure to prevent the grille and the second U-shaped frame from rotating and shaking relative to the first U-shaped frame, so that the grille and the second U-shaped frame can always be in the open state; changing the opening method of the grille and the second U-shaped frame can reduce the occupied space during the opening process of the grille, facilitate the arrangement of the first U-shaped frame, the second U-shaped frame and the grille in a narrow space, improve the applicable range, and at the same time facilitate the disassembly of the grille from the second U-shaped frame, improving the disassembly and assembly efficiency. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is one of the overall structural schematic diagrams of the embodiment of the present invention; Figure 2 is the second of the overall structural schematic diagrams of the embodiment of the present invention; Figure 3 is the structural schematic diagram of the bottom of the first U-shaped frame of the embodiment of the present invention; Figure 4 is the structural schematic diagram of the split of the limiting block and the rotating plate of the embodiment of the present invention; Figure 5 is the structural schematic diagram of the second U-shaped frame of the embodiment of the present invention; Figure 6 is the structural schematic diagram of the split of the locking unit of the embodiment of the present invention.

[0018] The labels in the figure are: 1. First U-shaped frame; 2. Second U-shaped frame; 3. Installation groove; 4. Grille; 5. Avoidance hole; 6. First rotating shaft; 7. Slide block; 8. Limit hole; 9. Round hole; 10. Support plate; 11. Support part; 12. Second rotating shaft; 13. First baffle; 14. First iron plate; 15. First magnet block; 16. Rotating plate; 17. Third rotating shaft; 18. Side plate; 19. Second baffle; 20. Second magnet block; 21. Second iron plate; 22. Limit block; 23. Fixed block; 24. Slide groove; 25. Stop block; 26. Positioning groove; 27. Fixed disk; 28. Positioning column; 29. Tensile spring; 30. Accommodation groove; 31. Anti-detachment block; 32. Installation frame; 33. Lead screw; 34. Support block; 35. Nut. Detailed implementation manner

[0019] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in detail in conjunction with specific embodiments.

[0020] Example 1, given by Figure 1 , Figure 2 , Figure 3 and Figure 5 The present invention includes a first U-shaped frame 1 and a second U-shaped frame 2. The bottom of the second U-shaped frame 2 is in contact with the bottom of the inner wall of the first U-shaped frame 1. Installation grooves 3 adapted to the grille 4 are respectively formed in the inner walls on both sides of the second U-shaped frame 2. Two shielding mechanisms for shielding the installation grooves 3 are installed at the top end of the first U-shaped frame 1. The first U-shaped frame 1 is provided with an anti-rotation positioning structure for limiting the position of the second U-shaped frame 2; A relief hole 5 is provided at the bottom of the inner wall of the first U-shaped frame 1. A first rotating shaft 6 adapted to the relief hole 5 is fixedly connected to the bottom of the second U-shaped frame 2. The first rotating shaft 6 penetrates through the relief hole 5. A support plate 10 is fixedly connected to the bottom of the first U-shaped frame 1. A limiting hole 8 and a circular hole 9 are respectively provided at the top of the support plate 10, and the inner walls of one side of the limiting hole 8 and the inner wall of the circular hole 9 are communicated. A sliding block 7 located in the circular hole 9 is fixedly connected to the bottom end of the first rotating shaft 6, and arc-shaped surfaces adapted to the circular hole 9 are respectively provided at both ends of the sliding block 7; The staff fixedly installs the first U-shaped frame 1 at a preset position. The staff inserts the two ends of the grille 4 to be installed into the two installation slots 3 respectively. The installation slots 3 and the grille 4 are blocked by a shielding mechanism to prevent the ends of the grille 4 from sliding out of the installation slots 3, so that the grille 4 is fixed relative to the second U-shaped frame 2. When it is necessary to drive the grille 4 and the second U-shaped frame 2 to open, the limitation of the position of the grille 4 is released through an anti-rotation positioning structure, so that the grille 4, the second U-shaped frame 2, the first rotating shaft 6 and the sliding block 7 can rotate relative to the first U-shaped frame 1. The staff drives the second U-shaped frame 2 and the grille 4 to rotate. The sliding block 7 rotates in the circular hole 9. When the grille 4 and the second U-shaped frame 2 rotate 90 degrees, when the arc-shaped surface of the sliding block 7 faces the limiting hole 8, at this time, the staff drives the grille 4, the second U-shaped frame 2, the first rotating shaft 6 and the sliding block 7 to translate, so that the sliding block 7 slides into the limiting hole 8, and the first rotating shaft 6 slides relative to the relief hole 5. The position of the sliding block 7 is limited by the inner walls on both sides of the limiting hole 8 to prevent the sliding block 7 from rotating and shaking relative to the limiting hole 8. When the grille 4 is translated to the preset position, the position of the grille 4 is limited by the anti-rotation positioning structure to prevent the grille 4 and the second U-shaped frame 2 from rotating and shaking relative to the first U-shaped frame 1, so that the grille 4 and the second U-shaped frame 2 can always be in an open state; Change the opening method of the grille 4 and the second U-shaped frame 2, so as to reduce the occupied space during the opening process of the grille 4, facilitate the arrangement of the first U-shaped frame 1, the second U-shaped frame 2 and the grille 4 in a narrow space, improve the scope of application, and at the same time facilitate the disassembly of the grille 4 from the second U-shaped frame 2, improving the disassembly and assembly efficiency.

[0021] Embodiment 2, on the basis of Embodiment 1, by Figure 1 、 Figure 2 、 Figure 3 and Figure 4Given that the anti-rotation positioning structure includes a rotating plate 16 disposed above the support plate 10. One end of the rotating plate 16 is fixedly connected to a second baffle 19 adapted to the second U-shaped frame 2. The top end of the first U-shaped frame 1 is provided with a rotating mechanism adapted to the rotating plate 16. One side of the first U-shaped frame 1 away from the rotating plate 16 is fixedly connected to a support portion 11. A second rotating shaft 12 penetrates through the support portion 11. Both ends of the second rotating shaft 12 are respectively fixedly connected to a first baffle 13. And the adjacent surfaces of the two first baffles 13 are respectively in contact with both sides of the second U-shaped frame 2. The first U-shaped frame 1 is provided with a magnetic attraction member adapted to the first baffle 13. The magnetic attraction member includes a first iron plate 14 fixedly installed on the first baffle 13. The bottom of the first iron plate 14 is in contact with a first magnet block 15. And the first magnet block 15 is fixedly connected to the first U-shaped frame 1. The rotating mechanism includes a third rotating shaft 17 fixedly installed at one end of the rotating plate 16 away from the second baffle 19. Both ends of the third rotating shaft 17 are respectively rotatably connected to a side plate 18. And the side plate 18 is fixedly connected to the first U-shaped frame 1. A second iron plate 21 is fixedly connected to the rotating plate 16. A second magnet block 20 is in contact with the side of the second iron plate 21 facing the third rotating shaft 17. The bottom of the second magnet block 20 is fixedly connected to a limiting block 22. And the bottom end of the limiting block 22 penetrates through the rotating plate 16; The first iron plate 14 and the first magnet block 15 are magnetically attracted to each other. Through the design of the first iron plate 14 and the first magnet block 15, it is avoided that the first baffle 13 rotates and shakes relative to the support part 11 and the first U-shaped frame 1 due to non-human factors. When it is necessary to open the second U-shaped frame 2 and the grille 4, the staff drives the first baffle 13 and the second rotating shaft 12 to rotate relative to the support part 11, so that the first iron plate 14 is no longer magnetically attracted to the first magnet block 15, and the two first baffles 13 are no longer in contact with both sides of the second U-shaped frame 2, releasing the limitation on the position of the second U-shaped frame 2. Then, the second U-shaped frame 2, the first rotating shaft 6 and the slider 7 can rotate relative to the first U-shaped frame 1 and the round hole 9. When the second U-shaped frame 2 and the grille 4 rotate 90 degrees, and the second U-shaped frame 2 and the grille 4 slide relative to the first U-shaped frame 1 to a preset position, the staff drives the rotating plate 16 and the third rotating shaft 17 to rotate relative to the side plate 18, so that the second baffle 19 rotates to the side of the grille 4 away from the third rotating shaft 17. The position of the grille 4 is limited by the second baffle 19 to prevent the grille 4 and the second U-shaped frame 2 from moving towards the support part 11, so that the second U-shaped frame 2 and the grille 4 are stationary after being translated to the preset position. And the staff drives the limiting block 22 to penetrate the rotating plate 16 through the second magnet block 20, so that the rotating plate 16 moves to the side of the first U-shaped frame 1 away from the second baffle 19, and the limiting block 22 is in contact with the first U-shaped frame 1. The position of the rotating plate 16 is limited by the limiting block 22, and the grille 4 and the first U-shaped frame 1 are clamped by the second baffle 19 and the limiting block 22 to prevent the rotating plate 16 and the second baffle 19 from rotating and shaking relative to the first U-shaped frame 1. And the second magnet block 20 and the second iron plate 21 are magnetically attracted to each other. When it is necessary to release the limitation on the positions of the grille 4 and the second U-shaped frame 2, the staff drives the second magnet block 20 and the limiting block 22 to move, and the limiting block 22 is no longer in contact with the first U-shaped frame 1, so that the rotating plate 16 and the second baffle 19 can rotate. The staff can drive the second baffle 19 and the rotating plate 16 to rotate, so that the second baffle 19 no longer obstructs the grille 4 and the second U-shaped frame 2 from translating back to the initial position in the reverse direction.

[0022] Embodiment 3, on the basis of Embodiment 1, by Figure 3 and Figure 6Given that the shielding mechanism includes two fixing blocks 23 fixedly installed on the top of the first U-shaped frame 1. A chute 24 is formed on the fixing block 23. Two stop blocks 25 adapted to the installation groove 3 are in contact with the top of the first U-shaped frame 1, and the stop blocks 25 penetrate through the corresponding chutes 24. The fixing block 23 is equipped with a locking unit adapted to the stop block 25. The locking unit includes a fixing disk 27 arranged above the fixing block 23. A positioning column 28 is fixedly connected to the bottom of the fixing disk 27. A positioning groove 26 is formed on the top of the stop block 25, and the bottom end of the positioning column 28 is located in the positioning groove 26. A tension spring 29 is sleeved outside the positioning column 28. The two ends of the tension spring 29 are respectively fixedly connected to the bottom of the fixing disk 27 and the top of the fixing block 23. Two receiving grooves 30 are formed on both inner walls of the two sides of the chute 24. Two anti-disengagement blocks 31 adapted to the receiving grooves 30 are fixedly connected to both sides of the stop block 25. Mounting frames 32 are respectively in contact with both sides of the first U-shaped frame 1. A lead screw 33 is fixedly connected inside the mounting frame 32. A support block 34 is sleeved outside the lead screw 33, and the support block 34 is fixedly connected to the first U-shaped frame 1. Two nuts 35 are sleeved outside the lead screw 33, and the two adjacent nuts 35 are respectively located above and below the support block 34; The staff drives the fixing disk 27 and the positioning column 28 to move upward, so that the bottom end of the positioning column 28 disengages from the positioning groove 26, and the tension spring 29 is in a stretched state, releasing the limitation on the position of the stop block 25. The staff drives the stop block 25 to slide relative to the fixing block 23, so that the stop block 25 no longer shields the installation groove 3, and the anti-disengagement blocks 31 slide into the corresponding receiving grooves 30. Through the design of the anti-disengagement blocks 31, it is avoided that the stop block 25 slides out and falls off from the chute 24. At this time, the staff can drive the grille 4 to move upward, so that the end of the grille 4 slides out of the installation groove 3, facilitating the disassembly and assembly of the grille 4. The staff fixedly installs the mounting frame 32 at a preset position. The staff drives the support block 34 and the first U-shaped frame 1 to move vertically relative to the lead screw 33, changing the initial height of the first U-shaped frame 1. When the height of the first U-shaped frame 1 is adjusted, the staff drives the two adjacent nuts 35 to rotate, so that the two adjacent nuts 35 clamp the support block 34, and then the support block 34 and the first U-shaped frame 1 can be fixed relative to the mounting frame 32, facilitating the adjustment of the initial height of the first U-shaped frame 1 according to actual needs.

[0023] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A grille fixing structure that is convenient for disassembly, comprising a first U-shaped frame (1) and a second U-shaped frame (2), characterized in that, The bottom of the second U-shaped frame (2) is in contact with the bottom of the inner wall of the first U-shaped frame (1). Installation grooves (3) adapted to the grille (4) are respectively formed in the inner walls on both sides of the second U-shaped frame (2). Two shielding mechanisms for shielding the installation grooves (3) are installed at the top end of the first U-shaped frame (1). The first U-shaped frame (1) is provided with an anti-rotation positioning structure for limiting the position of the second U-shaped frame (2). An avoidance hole (5) is formed in the bottom of the inner wall of the first U-shaped frame (1). A first rotating shaft (6) adapted to the avoidance hole (5) is fixedly connected to the bottom of the second U-shaped frame (2). The first rotating shaft (6) penetrates through the avoidance hole (5). A support plate (10) is fixedly connected to the bottom of the first U-shaped frame (1). A limit hole (8) and a circular hole (9) are respectively formed in the top of the support plate (10). The inner wall on one side of the limit hole (8) is communicated with the inner wall of the circular hole (9). A slider (7) located in the circular hole (9) is fixedly connected to the bottom end of the first rotating shaft (6). Arc-shaped surfaces adapted to the circular hole (9) are respectively arranged at both ends of the slider (7).

2. The detachable grille fixing structure according to claim 1, characterized in that, The anti-rotation positioning structure includes a rotating plate (16) arranged above the support plate (10). A second baffle (19) adapted to the second U-shaped frame (2) is fixedly connected to one end of the rotating plate (16). A rotating mechanism adapted to the rotating plate (16) is installed at the top end of the first U-shaped frame (1). A support portion (11) is fixedly connected to one side of the first U-shaped frame (1) away from the rotating plate (16). A second rotating shaft (12) penetrates through the support portion (11). First baffles (13) are respectively fixedly connected to both ends of the second rotating shaft (12). The adjacent surfaces of the two first baffles (13) are respectively in contact with both sides of the second U-shaped frame (2). A magnetic attraction member adapted to the first baffle (13) is installed on the first U-shaped frame (1).

3. The detachable grille fixing structure according to claim 2, wherein, The magnetic attraction member includes a first iron plate (14) fixedly installed on the first baffle (13). A first magnet block (15) is in contact with the bottom of the first iron plate (14). The first magnet block (15) is fixedly connected to the first U-shaped frame (1).

4. The detachable grille fixing structure according to claim 2, characterized in that, The rotating mechanism includes a third rotating shaft (17) fixedly installed at one end of the rotating plate (16) away from the second baffle (19). Side plates (18) are respectively rotatably connected to both ends of the third rotating shaft (17). The side plates (18) are fixedly connected to the first U-shaped frame (1).

5. The detachable grille fixing structure according to claim 4, wherein, A second iron plate (21) is fixedly connected to the rotating plate (16). A second magnet block (20) is in contact with the side of the second iron plate (21) facing the third rotating shaft (17). A limit block (22) is fixedly connected to the bottom of the second magnet block (20). The bottom end of the limit block (22) penetrates through the rotating plate (16).

6. The detachable grille fixing structure according to claim 1, wherein The shielding mechanism includes two fixed blocks (23) fixedly installed on the top of the first U-shaped frame (1). A sliding groove (24) is formed in the fixed block (23). Two stop blocks (25) adapted to the installation grooves (3) are in contact with the top of the first U-shaped frame (1). The stop blocks (25) penetrate through the corresponding sliding grooves (24). A locking unit adapted to the stop blocks (25) is installed on the fixed block (23).

7. The detachable grille fixing structure according to claim 6, characterized in that, The locking unit includes a fixed disk (27) arranged above the fixed block (23). A positioning column (28) is fixedly connected to the bottom of the fixed disk (27). A positioning groove (26) is formed in the top of the stop block (25), and the bottom end of the positioning column (28) is located in the positioning groove (26). A tension spring (29) is sleeved outside the positioning column (28), and the two ends of the tension spring (29) are respectively fixedly connected to the bottom of the fixed disk (27) and the top of the fixed block (23).

8. The detachable grille fixing structure according to claim 6, characterized in that, Two receiving grooves (30) are formed in the inner walls on both sides of the sliding groove (24). Two anti - detachment blocks (31) adapted to the receiving grooves (30) are fixedly connected to both sides of the stop block (25).

9. The detachable grille fixing structure according to claim 1, characterized in that Mounting frames (32) are respectively contacted on both sides of the first U - shaped frame (1). A lead screw (33) is fixedly connected inside the mounting frame (32). A support block (34) is sleeved outside the lead screw (33), and the support block (34) is fixedly connected to the first U - shaped frame (1). Two nuts (35) are sleeved outside the lead screw (33), and two adjacent nuts (35) are respectively located above and below the support block (34).