Adsorption device for taking out notebook computer shell

Abstract

The invention belongs to the technical field of notebook computer production and detection, and discloses an adsorption device for taking out a notebook computer shell, the adsorption device comprises a mounting disc, the top of the mounting disc is provided with a plurality of first sliding holes, the inner walls of the first sliding holes are fixedly connected with second sliding rods, and the outer walls of the second sliding rods are sleeved with first springs; the outer wall of each second sliding rod is sleeved with a slidable positioning column, the outer wall of each second sliding rod is sleeved with a slidable limiting sleeve, the outer wall of each positioning column is rotationally connected with a swing arm, the end of each swing arm is fixedly connected with a suction cup, and a limiting assembly is installed on the outer wall of the installation disc. And on the other hand, a multi-point adsorption mode is adopted, so that the force can be distributed more uniformly, the risk of single-point stress is reduced, and meanwhile, the shell can be quickly taken out.

Description

Technical Field

[0001] The invention relates to the technical field of notebook computer production detection, and more particularly to an adsorption device for taking out a notebook computer shell. Background Art

[0002] The laptop shell is the outer protective layer of the laptop. It is generally made of engineering plastics, magnesium-aluminum alloy or carbon fiber composite materials, and is lightweight, strong and beautiful. During the production process of the laptop shell, an adsorption device is used to remove the shell from the mold, avoiding the tedious and time-consuming manual removal of the shell, thereby improving production efficiency.

[0003] The existing adsorption method often relies on manual operation during the shell removal process. Specifically, the operator holds a suction cup and directly adsorbs it to a specific position of the notebook shell, and then removes the shell from the mold. Since the suction cup is usually only adsorbed on a single point position of the shell, the force is too concentrated at this position. This unbalanced force situation not only increases the risk of damage to the shell, but also makes it impossible to effectively remove the shell due to insufficient force. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an adsorption device for removing a laptop computer shell, which can adapt to the removal of laptop shells of different sizes and shapes, and adopts a multi-point adsorption method, which can distribute the force more evenly, reduce the risk of single-point force, and facilitate the rapid removal of the shell.

[0005] In order to solve the above-mentioned technical problems, the present invention proposes the following technical solutions: an adsorption device for removing a laptop computer casing comprises a mounting plate, a plurality of first sliding holes are opened on the top of the mounting plate, the inner walls of the first sliding holes are fixedly connected with second sliding rods, the outer walls of the second sliding rods are sleeved with first springs, the outer walls of the second sliding rods are sleeved with slidable positioning columns, the outer walls of the second sliding rods are sleeved with slidable limiting sleeves, the outer walls of the positioning columns are rotatably connected with swing arms, the ends of the swing arms are fixedly connected with suction cups, a limiting assembly is installed on the outer wall of the mounting plate, a clamping assembly is installed on the inner wall of the positioning column, and the limiting assembly is used to fix the clamping assembly.

[0006] Preferably, one end of the first spring is fixedly connected to the limiting sleeve, and the other end of the first spring is fixedly connected to the inner wall of the mounting plate.

[0007] Preferably, the limit assembly includes a movable rod, which passes through the mounting plate and is slidably connected thereto, the outer wall of the movable rod is sleeved with a third spring, the bottom of the movable rod is fixedly connected to the tray, the outer wall of the movable rod is fixedly connected to a plurality of connecting arms, the inner walls of the connecting arms are fixedly connected to a fourth sliding rod, a plurality of tooth plates are provided above the mounting plate, the ends of the tooth plates are rotatably connected to support shafts, both ends of the support shafts are fixedly connected to support blocks, the bottom of the support block is fixedly connected to the mounting plate, second sliding holes are provided on both sides of the inner wall of the tooth plate, the inner walls of the second sliding holes are fixedly connected to a fifth sliding rod, the ends of the fifth sliding rod pass through the fourth sliding rod and are slidably connected thereto, and the outer walls of the fifth sliding rod are sleeved with a fourth spring.

[0008] Preferably, one end of the third spring is fixedly connected to the bottom of the mounting plate, and the other end of the third spring is fixedly connected to the tray.

[0009] Preferably, one end of the fourth spring is fixedly connected to the tooth plate, and the other end of the fourth spring is fixedly connected to the fourth sliding rod.

[0010] Preferably, the clamping assembly includes a clamping column, a clamping groove is formed at the end of the clamping column, and the clamping groove is clamped with the bottom of the tooth plate. Two second sliding blocks are fixedly connected to the outer wall of the positioning column, and the inner walls of the two second sliding blocks are both slidably connected to a third sliding rod, and the outer wall of the third sliding rod is sleeved with a second spring.

[0011] Preferably, a telescopic groove is provided on the inner wall of the positioning column, two second sliding grooves are provided on the inner wall of the telescopic groove, two ends of the third sliding rod are respectively fixedly connected to the inner walls of the second sliding grooves, and the clamping column is slidably connected to the inner wall of the telescopic groove.

[0012] Preferably, one end of the second spring is fixedly connected to the positioning column, and the other end of the second spring is fixedly connected to the second sliding block.

[0013] Preferably, the outer wall of the mounting plate is fixedly connected with a gear ring, the top of the swing arm is fixedly connected with a support plate, the inner wall of the support plate is slidably connected with a clamping rod, the outer wall of the clamping rod is sleeved with a fifth spring, the end of the clamping rod is clamped with the gear ring, one end of the fifth spring is fixedly connected to the support plate, and the other end of the fifth spring is fixedly connected to the clamping rod.

[0014] Preferably, it also includes a mounting seat, wherein the inner wall of the mounting seat is fixedly connected to a bracket, the top of the bracket is fixedly connected to an electric push rod, the output end of the electric push rod passes through the bracket and is slidably connected to the bracket, the output end of the electric push rod is fixedly connected to a connecting shaft, the bottom of the connecting shaft is fixedly connected to the mounting plate, and a plurality of first sliding grooves are opened on the top of the mounting seat, the inner wall of the first sliding groove located in the middle is rotatably connected to a two-way threaded rod, the end of the two-way threaded rod passes through the mounting seat and extends to its outside, the outer end of the two-way threaded rod is fixedly connected to a knob, the inner wall of the first sliding groove located in the middle is slidably connected to a threaded block, the two ends of the two-way threaded rod respectively pass through the threaded blocks and are threadedly connected thereto, the inner walls of the first sliding grooves on both sides are slidably connected to two first sliding blocks, the tops of the two threaded blocks are fixedly connected to positioning plates, the inner wall of the positioning plate is fixedly connected to two first sliding rods, the inner wall of the positioning plate is slidably connected to a pressing plate, the end of the first sliding rod passes through the pressing plate and is slidably connected thereto, the top of the positioning plate is threadedly connected to an adjusting screw, the end of the adjusting screw is rotatably connected to the pressing plate, and the bottom of the positioning plate is respectively fixedly connected to the first sliding block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the position of the suction cup can be flexibly adjusted through the coordinated work of the swing arm, the positioning column, the clamping column and the tooth plate, so as to adapt to the removal of notebook shells of different sizes and shapes. The multi-point adsorption method can distribute the force more evenly, reduce the risk of single-point force, and facilitate the rapid removal of the shell.

[0017] 2. In the present invention, the position of the suction cup can be locked by pulling the swing arm outward and compressing the spring, and by the interaction between the clamping column and the toothed plate, thereby ensuring the stability and reliability of the suction cup during the adsorption process.

[0018] 3. In the present invention, by pressing the tray upward, the movable rod slides upward, the movable rod drives the connecting arm to move, and then drives the fourth slide bar to move. The fourth slide bar pushes the tooth plate to rotate around the support shaft, so that the tooth plate is disengaged from the clamping column. Under the elastic force of the first spring, multiple clamping columns can be quickly reset, and the gymnastics operation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the installation structure of the suction cup in the first embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the installation disk in the first embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation structure of the swing arm in the first embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the installation structure of the clamping column in the first embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the installation structure of the tooth plate in the first embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the installation structure of the clamping rod in the first embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the installation structure of the fourth sliding bar in the first embodiment of the present invention

[0028] Fig. 9 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0029] Fig.10 This is a schematic diagram of the installation structure of the positioning plate in the second embodiment of the present invention.

[0030] Explanation of the numbers in the figure: 1. Mounting seat; 2. First slide groove; 3. Bidirectional threaded rod; 4. Knob; 5. Threaded block; 6. Positioning plate; 7. First slider; 8. First slide rod; 9. Press plate; 10. Adjusting screw; 11. Bracket; 12. Electric push rod; 13. Connecting shaft; 14. Mounting plate; 15. First slide hole; 16. Gear ring; 17. Second slide rod; 18. First spring; 19. Positioning column; 20. Limit sleeve; 21. Telescopic slot; 22 , second slide groove; 23, second slider; 24, third slide rod; 25, second spring; 26, clamping column; 27, clamping groove; 28, tooth plate; 29, suction cup; 30, movable rod; 31, third spring; 32, tray; 33, connecting arm; 34, fourth slide rod; 35, support block; 36, support shaft; 37, swing arm; 38, second slide hole; 39, fifth slide rod; 40, fourth spring; 41, support plate; 42, clamping rod; 43, fifth spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the implementation mode of the present application clearer, the technical solution in the implementation mode of the present application will be clearly and completely described in combination with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application. The specific implementation modes of the present invention are described in detail in combination with the drawings in the specification.

[0032] Embodiment 1, as Figures 1 to 8 As shown, this embodiment provides a technical solution: an adsorption device for taking out the shell of a laptop computer, comprising a bracket 11, a top of the bracket 11 is fixedly connected to an electric push rod 12, an output end of the electric push rod 12 passes through the bracket 11 and is slidably connected thereto, an output end of the electric push rod 12 is fixedly connected to a connecting shaft 13, a bottom of the connecting shaft 13 is fixedly connected to a mounting plate 14, a top of the mounting plate 14 is provided with a plurality of first sliding holes 15, inner walls of the first sliding holes 15 are fixedly connected to second sliding rods 17, outer walls of the second sliding rods 17 are sleeved with first springs 18, outer walls of the second sliding rods 17 are sleeved with slidable positioning columns 19, outer walls of the second sliding rods 17 are sleeved with slidable limiting sleeves 20, one end of the first spring 18 is fixedly connected to the limiting sleeve 20, and the first spring 18 is fixedly connected to the limiting sleeve 20. The other end of the spring 18 is fixedly connected to the inner wall of the mounting plate 14, and the outer wall of the positioning column 19 is rotatably connected to a swing arm 37, and the end of the swing arm 37 is fixedly connected to a suction cup 29. A limiting assembly is installed on the outer wall of the mounting plate 14, and a clamping assembly is installed on the inner wall of the positioning column 19, and the limiting assembly is used to fix the clamping assembly; by pulling the swing arm 37 outward, the swing arm 37 drives the positioning column 19 to slide along the second slide rod 17, and the swing arm 37 compresses the first spring 18 through the limiting sleeve 20. The movement of the positioning column 19 causes the end of the clamping column 26 to slide along the bottom of the tooth plate 28. Under the elastic force of the first spring 18 and the second spring 25, the clamping column 26 is clamped at the bottom of the tooth plate 28, so that the adjusted swing arm 37 can be quickly fixed.

[0033] The limit assembly includes a movable rod 30, which passes through the mounting plate 14 and is slidably connected thereto. A third spring 31 is sleeved on the outer wall of the movable rod 30. A tray 32 is fixedly connected to the bottom of the movable rod 30. One end of the third spring 31 is fixedly connected to the bottom of the mounting plate 14. The other end of the third spring 31 is fixedly connected to the tray 32. A plurality of connecting arms 33 are fixedly connected to the outer wall of the movable rod 30. The inner walls of the connecting arms 33 are all fixedly connected to the fourth sliding rod 34. A plurality of tooth plates 28 are provided above the mounting plate 14. The ends of the tooth plates 28 are fixedly connected to the outer wall of the movable rod 30. The tooth plate 28 is rotatably connected to a support shaft 36, both ends of the support shaft 36 are fixedly connected to a support block 35, the bottom of the support block 35 is fixedly connected to the mounting plate 14, second sliding holes 38 are opened on both sides of the inner wall of the tooth plate 28, the inner walls of the second sliding holes 38 are fixedly connected to a fifth sliding rod 39, the end of the fifth sliding rod 39 passes through the fourth sliding rod 34 and is slidably connected thereto, the outer wall of the fifth sliding rod 39 is sleeved with a fourth spring 40, one end of the fourth spring 40 is fixedly connected to the tooth plate 28, and the other end of the fourth spring 40 is fixedly connected to the fourth sliding rod 34.

[0034] The clamping assembly includes a clamping column 26, a clamping groove 27 is provided at the end of the clamping column 26, and the clamping groove 27 is clamped and matched with the bottom of the tooth plate 28. The outer wall of the positioning column 19 is fixedly connected to two second sliders 23, and the inner walls of the two second sliders 23 are both slidably connected with the third slide rod 24. The outer walls of the third slide rod 24 are sleeved with a second spring 25. The inner wall of the positioning column 19 is provided with a telescopic groove 21, and the inner wall of the telescopic groove 21 is provided with two second slide grooves 22. The two ends of the third slide rod 24 are respectively fixedly connected to the inner walls of the second slide groove 22, the clamping column 26 is slidably connected to the inner wall of the telescopic groove 21, one end of the second spring 25 is fixedly connected to the positioning column 19, and the other end of the second spring 25 is fixedly connected to the second slider 23.

[0035] The outer wall of the mounting plate 14 is fixedly connected with the gear ring 16, the top of the swing arm 37 is fixedly connected with the support plate 41, the inner wall of the support plate 41 is slidably connected with the clamping rod 42, the outer wall of the clamping rod 42 is sleeved with a fifth spring 43, one end of the fifth spring 43 is fixedly connected to the support plate 41, the other end of the fifth spring 43 is fixedly connected to the clamping rod 42, and the end of the clamping rod 42 is clamped and matched with the gear ring 16.

[0036] When the shell needs to be taken out of the mold, the bracket 11 is installed at the corresponding position, and the electric push rod 12 pushes the installation plate 14 to move through the connecting shaft 13, and the suction cup 29 on the installation plate 14 adsorbs the shell, so that the shell can be taken out;

[0037] Pull the swing arm 37 outward, the swing arm 37 drives the positioning column 19 to slide along the second slide bar 17, and the swing arm 37 compresses the first spring 18 through the limiting sleeve 20. When the positioning column 19 moves, the end of the clamping column 26 slides along the bottom of the tooth plate 28, and under the elastic force of the first spring 18 and the second spring 25, the clamping column 26 is clamped at the bottom of the tooth plate 28, thereby fixing the adjusted swing arm 37, and then adjusting the position of the suction cup 29 to adapt to the size of notebook shells of different sizes;

[0038] The tray 32 is pressed upward to slide the movable rod 30 upward, and the movable rod 30 drives the connecting arm 33 to move, and the connecting arm 33 drives the fourth slide bar 34 to move, and the fourth slide bar 34 drives the tooth plate 28 to rotate around the support shaft 36. At this time, the tooth plate 28 is disengaged from the clamping column 26. At this time, under the elastic force of the first spring 18, the multiple clamping columns 26 can be quickly reset;

[0039] Pull the clamping rod 42 outward to disengage the clamping rod 42 from the gear ring 16, and rotate the swing arm 37 to rotate around the positioning column 19. Under the elastic force of the fifth spring 43, the gear ring 16 is fixed by the clamping rod 42, thereby adjusting the position of the suction cup 29.

[0040] Embodiment 2: This embodiment is further optimized on the basis of embodiment 1, and the same parts as the above technical solution will not be repeated here. Fig. 9 and Fig.10As shown, in order to facilitate the removal of the shell during maintenance, the following setting method is particularly adopted: an adsorption device for removing the shell of a laptop computer, also includes a mounting seat 1, a bracket 11 is fixedly connected to the inner wall of the mounting seat 1, a plurality of first slide grooves 2 are opened on the top of the mounting seat 1, a bidirectional threaded rod 3 is rotatably connected to the inner wall of the first slide groove 2 located in the middle, the end of the bidirectional threaded rod 3 penetrates the mounting seat 1 and extends to its outside, a knob 4 is fixedly connected to the outer end of the bidirectional threaded rod 3, a threaded block 5 is slidably connected to the inner wall of the first slide groove 2 located in the middle, the two ends of the bidirectional threaded rod 3 penetrate the threaded block 5 respectively and are threadedly connected thereto, two first sliders 7 are slidably connected to the inner walls of the first slide groove 2 on both sides, a positioning plate 6 is fixedly connected to the top of the two threaded blocks 5, two first slide rods 8 are fixedly connected to the inner wall of the positioning plate 6, a pressing plate 9 is slidably connected to the inner wall of the positioning plate 6, the end of the first slide rod 8 penetrates the pressing plate 9 and is slidably connected thereto, an adjusting screw 10 is threadedly connected to the top of the positioning plate 6, the end of the adjusting screw 10 is rotatably connected to the pressing plate 9, and the bottom of the positioning plate 6 is respectively fixedly connected to the first slider 7. Place the notebook with the screws removed on the top of the mounting base 1, and rotate the knob 4 to drive the bidirectional threaded rod 3 to rotate. The two threaded blocks 5 slide along the inner wall of the first slide groove 2 respectively, and at the same time drive the positioning plate 6 to move. The positioning plate 6 drives the first slide block 7 to slide along the inner wall of the first slide groove 2, and the two positioning plates 6 are moved to both sides of the notebook computer shell. By rotating the adjusting screw 10, the pressure plate 9 is pushed to slide downward along the outer wall of the first slide rod 8 to fix the side of the notebook, thereby facilitating the removal of the shell during maintenance.

[0041] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adsorption device for removing a notebook computer casing, comprising a mounting plate (14), characterized in that: A plurality of first sliding holes (15) are provided on the top of the mounting plate (14), the inner walls of the first sliding holes (15) are fixedly connected with second sliding rods (17), the outer walls of the second sliding rods (17) are sleeved with first springs (18), the outer walls of the second sliding rods (17) are sleeved with slidable positioning columns (19), the outer walls of the second sliding rods (17) are sleeved with slidable limiting sleeves (20), the outer walls of the positioning columns (19) are rotatably connected with swing arms (37), the ends of the swing arms (37) are fixedly connected with suction cups (29), the outer wall of the mounting plate (14) is installed with a limiting assembly, the inner wall of the positioning columns (19) is installed with a clamping assembly, and the limiting assembly is used to fix the clamping assembly.

2. The suction device for removing a laptop computer casing according to claim 1, characterized in that: One end of the first spring (18) is fixedly connected to the limiting sleeve (20), and the other end of the first spring (18) is fixedly connected to the inner wall of the mounting plate (14).

3. The suction device for removing a notebook computer shell according to claim 2, characterized in that: The limiting assembly comprises a movable rod (30), the movable rod (30) passes through the mounting plate (14) and is slidably connected thereto, the outer wall of the movable rod (30) is sleeved with a third spring (31), the bottom of the movable rod (30) is fixedly connected to a tray (32), the outer wall of the movable rod (30) is fixedly connected to a plurality of connecting arms (33), the inner walls of the connecting arms (33) are fixedly connected to a fourth sliding rod (34), and a plurality of tooth plates (28) are arranged above the mounting plate (14), the tooth plates (28) ) ends are rotatably connected to support shafts (36), both ends of the support shafts (36) are fixedly connected to support blocks (35), the bottom of the support block (35) is fixedly connected to the mounting plate (14), second sliding holes (38) are opened on both sides of the inner wall of the tooth plate (28), the inner wall of the second sliding hole (38) is fixedly connected to a fifth sliding rod (39), the end of the fifth sliding rod (39) passes through the fourth sliding rod (34) and is slidably connected thereto, and the outer wall of the fifth sliding rod (39) is sleeved with a fourth spring (40).

4. The adsorption device for removing the notebook computer shell according to claim 3, characterized in that: One end of the third spring (31) is fixedly connected to the bottom of the mounting plate (14), and the other end of the third spring (31) is fixedly connected to the tray (32).

5. The suction device for removing a notebook computer shell according to claim 4, characterized in that: One end of the fourth spring (40) is fixedly connected to the toothed plate (28), and the other end of the fourth spring (40) is fixedly connected to the fourth sliding rod (34).

6. The suction device for removing a notebook computer shell according to claim 5, characterized in that: The clamping assembly comprises a clamping column (26), a clamping groove (27) is formed at the end of the clamping column (26), and the clamping groove (27) is clamped with the bottom of the tooth plate (28). The outer wall of the positioning column (19) is fixedly connected with two second sliding blocks (23), and the inner walls of the two second sliding blocks (23) are both slidably connected with a third sliding rod (24), and the outer wall of the third sliding rod (24) is sleeved with a second spring (25).

7. The adsorption device for removing the notebook computer shell according to claim 6, characterized in that: The inner wall of the positioning column (19) is provided with a telescopic groove (21), the inner wall of the telescopic groove (21) is provided with two second sliding grooves (22), the two ends of the third sliding rod (24) are respectively fixedly connected to the inner walls of the second sliding grooves (22), and the clamping column (26) is slidably connected to the inner wall of the telescopic groove (21).

8. The adsorption device for removing the notebook computer shell according to claim 7, characterized in that: One end of the second spring (25) is fixedly connected to the positioning column (19), and the other end of the second spring (25) is fixedly connected to the second sliding block (23).

9. The suction device for removing a notebook computer shell according to claim 8, characterized in that: The outer wall of the mounting plate (14) is fixedly connected with a gear ring (16), the top of the swing arm (37) is fixedly connected with a support plate (41), the inner wall of the support plate (41) is slidably connected with a clamping rod (42), the outer wall of the clamping rod (42) is sleeved with a fifth spring (43), the end of the clamping rod (42) is clamped with the gear ring (16), one end of the fifth spring (43) is fixedly connected with the support plate (41), and the other end of the fifth spring (43) is fixedly connected with the clamping rod (42).

10. The adsorption device for removing the notebook computer shell according to claim 9, characterized in that: The mounting base (1) further comprises a mounting base (1), wherein the inner wall of the mounting base (1) is fixedly connected to a bracket (11), the top of the bracket (11) is fixedly connected to an electric push rod (12), the output end of the electric push rod (12) passes through the bracket (11) and is slidably connected thereto, the output end of the electric push rod (12) is fixedly connected to a connecting shaft (13), the bottom of the connecting shaft (13) is fixedly connected to a mounting plate (14), a plurality of first slide grooves (2) are provided on the top of the mounting base (1), the inner wall of the first slide groove (2) located in the middle is rotatably connected to a bidirectional threaded rod (3), the end of the bidirectional threaded rod (3) passes through the mounting base (1) and extends to the outside thereof, the outer end of the bidirectional threaded rod (3) is fixedly connected to a knob (4), the first slide groove (2) located in the middle 2) The inner wall is slidably connected with a thread block (5), the two ends of the bidirectional threaded rod (3) respectively penetrate the thread block (5) and are threadedly connected thereto, the inner walls of the first slide groove (2) on both sides are slidably connected with two first sliding blocks (7), the tops of the two thread blocks (5) are fixedly connected with a positioning plate (6), the inner wall of the positioning plate (6) is fixedly connected with two first sliding rods (8), the inner wall of the positioning plate (6) is slidably connected with a pressing plate (9), the end of the first sliding rod (8) penetrates the pressing plate (9) and is slidably connected thereto, the top of the positioning plate (6) is threadedly connected with an adjusting screw (10), the end of the adjusting screw (10) is rotatably connected to the pressing plate (9), and the bottom of the positioning plate (6) is respectively fixedly connected to the first sliding block (7).

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