Ink disc cleaning device of photogravure press
By designing an automated ink disc cleaning device of the gravure printing press, the automatic cleaning of rotary and hydraulic flushing combined with cleaning rollers and wipe pads is solved, and the problems of low efficiency and unsatisfactory ink disc cleaning in the prior art are achieved, achieving an efficient and environmentally friendly ink disc cleaning effect.
Patent Information
- Application Number
- CN202421920420.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing gravure printing press ink tray cleaning device is cleaned with solvent and cleaned with manual brush, making it difficult to completely remove ink residues and impurities, resulting in low efficiency, unsatisfactory effect, inconvenient operation and possible damage to the ink tray.
An ink disc cleaning device including a cleaning box, a rotating mechanism, a clamping mechanism and a cleaning mechanism is designed. Automatic cleaning is achieved by rotating and moving the cleaning roller and contacting the ink disc with the wipe pad, and combined with water pressure flushing.
It improves the cleaning efficiency of ink discs and completely removes ink residues and impurities. It is suitable for ink discs of different sizes, avoiding inconvenience of manual operation and environmental pollution.
Smart Images

Figure CN223058600U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of intaglio printing, in particular to an ink tray cleaning device for an intaglio printing machine. Background Art
[0002] Intaglio printing is a high-quality printing method, which is widely used in the fields of packaging, publishing, labeling, and security printing. The main feature of intaglio printing is that the graphic part on the printing plate is sunken, and the non-graphic part is convex. During printing, the ink roller coats the ink on the sunken graphic part, and then transfers it through paper or other materials to complete the printing. Intaglio printing has the advantages of high printing quality, rich colors, and being suitable for large-scale printing.
[0003] At present, the ink tray is an important part of an intaglio printing machine, and its main function is to store and supply ink to ensure that the ink is evenly coated on the printing plate. However, during the printing process, the ink tray will gradually accumulate residual ink, paper scraps, and other impurities, resulting in ink pollution, a decline in printing quality, and even possible damage to the printing machine. Therefore, regularly cleaning the ink tray is an important link to ensure the quality of intaglio printing.
[0004] However, the current ink tray cleaning devices for intaglio printing machines often use solvents to clean the ink tray and manually clean the ink tray with brushes, which are difficult to completely remove ink residues and impurities, and are prone to damage the surface of the ink tray. These traditional cleaning methods have problems such as low efficiency, unsatisfactory cleaning effect, environmental pollution, and inconvenient operation. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an ink tray cleaning device for an intaglio printing machine to solve the technical problems that the current ink tray cleaning devices for intaglio printing machines often use solvents to clean the ink tray and manually clean the ink tray with brushes, which are difficult to completely remove ink residues and impurities, are prone to damage the surface of the ink tray, and these traditional cleaning methods have problems such as low efficiency, unsatisfactory cleaning effect, environmental pollution, and inconvenient operation.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] An ink tray cleaning device for an intaglio printing machine, comprising: a cleaning tank, a cleaning mechanism is arranged at the top of the cleaning tank and extends to the inside of the cleaning tank, a rotating mechanism is arranged at the top of the cleaning tank, a clamping mechanism is arranged on the outside of the rotating mechanism, and a cleaning mechanism is arranged on the inner wall of the cleaning tank;
[0008] The cleaning mechanism includes a sleeve, a limiting rod, an arc-shaped frame, a mounting frame, a moving block, a connecting frame, a cleaning roller, a wiping pad, an output shaft, a limiting frame, a lead screw, and a second spring. The sleeve is fixedly installed on the inner wall of the cleaning tank. One end of the limiting rod is inserted into the sleeve in a limited manner, and the other end of the limiting rod is fixedly connected to the arc-shaped frame. The connecting frame is fixedly installed at the bottom of the arc-shaped frame, and the limiting frame is fixedly installed at the bottom of the connecting frame. The mounting frame is fixedly installed on the outer wall of one side of the limiting frame. A second motor is fixedly installed on the top of the mounting frame, and the output end of the second motor is fixedly connected to the lead screw. The moving block is movably sleeved outside the lead screw. A moving plate is fixedly installed on the outer wall of one side of the moving block. A third motor is fixedly installed inside the moving plate, and the output end of the third motor is fixedly connected to the wiping pad. A vertical plate is fixedly installed on the outer wall of one side of the moving plate. Both ends of the cleaning roller are respectively inserted into the two vertical plates in a movable manner, and the cleaning roller is located on the upper and lower sides of the wiping pad.
[0009] Further, the second spring is movably arranged inside the sleeve, and one end of the limiting rod is clamped with the second spring.
[0010] Further, support legs are fixedly installed at the bottom of the cleaning tank. Foot pads are fixedly installed at the bottom ends of the support legs. A waste liquid tray is fixedly installed on the inner bottom wall of the cleaning tank. A liquid outlet pipe is fixedly installed inside the bottom wall of the waste liquid tray and extends to the bottom of the cleaning tank. A box door is installed on the front part of the cleaning tank through a hinge.
[0011] Further, the cleaning mechanism includes support columns, a top plate, a liquid storage tank, a connecting pipe, a water pump, an output pipe, and a spray head. The support columns are fixedly installed on the top of the cleaning tank. The liquid storage tank is fixedly installed at the top ends of the support columns. The water pump is fixedly installed on the top of the cleaning tank. The input end of the water pump is fixedly connected to one end of the connecting pipe, and the other end of the connecting pipe is communicated with the liquid storage tank.
[0012] Further, the output end of the water pump is connected to the output pipe and extends into the cleaning tank. The spray head is fixedly installed inside the pipe wall of the output pipe. The output pipe and the cleaning mechanism are distributed at intervals.
[0013] Further, the rotating mechanism includes a first motor, a rotating shaft, and a rotating plate. The first motor is fixedly installed on the top of the cleaning tank. The output end of the first motor is fixedly connected to the rotating shaft. The rotating plate is fixedly sleeved outside the rotating shaft. An arc-shaped groove is formed at the edge of the rotating plate, and the arc-shaped groove is connected to the arc-shaped frame in a limited manner.
[0014] Further, the clamping mechanism includes a connecting rod, a clamping frame, a limiting block, a threaded rod, a bottom plate, a telescopic rod and a first spring. One end of the connecting rod is fixedly connected to the outer wall of the rotating shaft, and the other end of the connecting rod is fixedly connected to the clamping frame. The threaded rod is movably inserted into the inner sides of the two side walls of the clamping frame. One end of the threaded rod is connected to the limiting block through a bearing. One end of the telescopic rod is limit-inserted into the inner bottom wall of the clamping frame. The first spring is movably sleeved outside the telescopic rod, and the other end of the telescopic rod is fixedly connected to the bottom plate.
[0015] Advantages of the present utility model:
[0016] By providing a cleaning mechanism, during use, the rotating mechanism drives the rotating plate and the clamping mechanism to rotate. When the arc-shaped groove of the rotating plate rotates to a position adapted to the arc-shaped frame, under the action of the second spring and the limiting rod, the arc-shaped frame is inserted into the arc-shaped groove, enabling the two to be inserted and matched. Then, the connecting frame drives the limiting frame to move, so that the cleaning roller and the wiping pad are in contact with the ink tray to be cleaned, making the cleaning effect of the ink tray better. At the same time, by turning on the switch of the second motor, the lead screw can drive the moving plate to move up and down, so that the cleaning roller and the wiping pad can clean different positions of the ink tray, making the device applicable to ink trays of different sizes. At the same time, by turning on the switch of the third motor to make the wiping pad rotate, rolling friction cleaning of the ink tray can be carried out, completely removing ink residues and impurities, not easily leaving residues, greatly improving the cleaning efficiency and making the cleaning effect better. Description of the drawings
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the ink tray cleaning device for an intaglio printing press;
[0019] Figure 2 It is a three-dimensional internal structural schematic diagram of an embodiment of the ink tray cleaning device for an intaglio printing press;
[0020] Figure 3 It is a three-dimensional structural schematic diagram of the cleaning mechanism of an embodiment of the ink tray cleaning device for an intaglio printing press;
[0021] Figure 4 It is a schematic diagram of the internal structure of the sleeve of an embodiment of the ink tray cleaning device for an intaglio printing press;
[0022] Figure 5Schematic diagram of the internal structure of the cleaning mechanism of the ink tray cleaning device of this intaglio printing press;
[0023] Figure 6 Schematic three-dimensional structure diagram of the water pump connection of the ink tray cleaning device of this intaglio printing press;
[0024] Figure 7 Schematic three-dimensional structure diagram of the clamping mechanism of the ink tray cleaning device of this intaglio printing press.
[0025] Explanation of the markings in the figure: 1. Cleaning tank; 11. Tank door; 12. Support legs; 13. Foot pads; 14. Waste liquid tray; 15. Liquid outlet pipe; 2. Rotating mechanism; 21. Motor 1; 22. Rotating shaft; 23. Rotating plate; 3. Cleaning mechanism; 31. Support columns; 32. Top plate; 33. Liquid storage tank; 34. Connecting pipe; 35. Water pump; 36. Output pipe; 37. Nozzle; 4. Clamping mechanism; 41. Connecting rod; 42. Clamping frame; 43. Limiting block; 44. Threaded rod; 45. Bottom plate; 46. Expansion rod; 47. Spring 1; 5. Cleaning mechanism; 51. Sleeve; 52. Limiting rod; 53. Arc-shaped frame; 54. Mounting frame; 55. Moving block; 56. Connecting frame; 57. Cleaning roller; 58. Wiping pad; 59. Output shaft; 50. Limiting frame; 510. Lead screw; 511. Spring 2; 512. Motor 2; 513. Moving plate; 514. Motor 3. Detailed implementation manners
[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the appended Figure 1-7 , obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0027] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.
[0028] It should also be understood that the terms used in this specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in this specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include the plural forms.
[0029] It should also be further understood that the term "and / or" used in the specification and appended claims of the present utility model refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0030] Please refer to Figure 1-7 As shown, a cleaning device for an intaglio printing press ink tray includes: a cleaning box 1, a cleaning mechanism 3 is arranged on the top of the cleaning box 1 and extends to the inside of the cleaning box 1, a rotating mechanism 2 is arranged on the top of the cleaning box 1, a clamping mechanism 4 is arranged on the outside of the rotating mechanism 2, and a cleaning mechanism 5 is arranged on the inner wall of the cleaning box 1;
[0031] The cleaning mechanism 5 includes a sleeve 51, a limiting rod 52, an arc-shaped frame 53, a mounting frame 54, a moving block 55, a connecting frame 56, a cleaning roller 57, a wiping pad 58, an output shaft 59, a limiting frame 50, a lead screw 510 and a second spring 511. The sleeve 51 is fixedly installed on the inner wall of the cleaning box 1. One end of the limiting rod 52 is inserted into the inside of the sleeve 51 in a limited manner, and the other end of the limiting rod 52 is fixedly connected to the arc-shaped frame 53. The connecting frame 56 is fixedly installed at the bottom of the arc-shaped frame 53. The limiting frame 50 is fixedly installed at the bottom of the connecting frame 56. The mounting frame 54 is fixedly installed on the outer wall of one side of the limiting frame 50. A second motor 512 is fixedly installed on the top of the mounting frame 54. The output end of the second motor 512 is fixedly connected to the lead screw 510. The moving block 55 is movably sleeved on the outside of the lead screw 510. A moving plate 513 is fixedly installed on the outer wall of one side of the moving block 55. A third motor 514 is fixedly installed inside the moving plate 513. The output end of the third motor 514 is fixedly connected to the wiping pad 58. A vertical plate is fixedly installed on the outer wall of one side of the moving plate 513. Both ends of the cleaning roller 57 are respectively inserted into the inside of the two vertical plates in a movable manner, and the cleaning roller 57 is located on the upper and lower sides of the wiping pad 58. The second spring 511 is movably arranged inside the sleeve 51. One end of the limiting rod 52 is clamped with the second spring 511..
[0032] Specifically, by providing a cleaning mechanism 5, during use, the rotating mechanism 2 drives the rotating plate and the clamping mechanism 4 to rotate. When the arc-shaped groove of the rotating plate 23 rotates to a position adapted to the arc-shaped frame 53, under the action of the second spring 511 and the limiting rod 52, the arc-shaped frame 53 is inserted into the arc-shaped groove, enabling the two to be fitted and inserted. Then, the connecting frame 56 drives the limiting frame 50 to move, so that the cleaning roller 57 and the wiping pad 58 are in contact with the ink tray to be cleaned, improving the cleaning effect of the ink tray. At the same time, by turning on the switch of the second motor 512, the lead screw 510 can drive the moving plate 513 to move up and down, so that the cleaning roller 57 and the wiping pad 58 can clean different positions of the ink tray, making the device applicable to ink trays of different sizes. At the same time, by turning on the switch of the third motor 514, the wiping pad 58 rotates, enabling rolling friction cleaning of the ink tray, thoroughly removing ink residues and impurities, with no easy residue, greatly improving the cleaning efficiency and making the cleaning effect better.
[0033] In this embodiment, support legs 12 are fixedly installed at the bottom of the cleaning box 1, and foot pads 13 are fixedly installed at the bottom ends of the support legs 12. A waste liquid tray 14 is fixedly installed on the inner bottom wall of the cleaning box 1. A liquid outlet pipe 15 is fixedly installed inside the bottom wall of the waste liquid tray 14 and extends to the bottom of the cleaning box 1. A box door 11 is installed on the front of the cleaning box 1 through a hinge.
[0034] Specifically, an external power supply of the device provides electrical energy for the device. The device is externally connected to a controller, which is a PLC board. The controller is electrically connected to the motors and the water pump 35. The mixed waste liquid after cleaning is collected by the waste liquid tray 14 and finally discharged through the liquid outlet pipe 15.
[0035] The cleaning mechanism 3 includes support columns 31, a top plate 32, a liquid storage tank 33, a connecting pipe 34, a water pump 35, an output pipe 36, and a spray head 37. The support columns 31 are fixedly installed on the top of the cleaning box 1. The liquid storage tank 33 is fixedly installed at the top of the support columns 31. The water pump 35 is fixedly installed on the top of the cleaning box 1. The input end of the water pump 35 is fixedly connected to one end of the connecting pipe 34, and the other end of the connecting pipe 34 communicates with the liquid storage tank 33. The output end of the water pump 35 is connected to the output pipe 36 and extends into the cleaning box 1. The spray head 37 is fixedly installed inside the pipe wall of the output pipe 36. The output pipe 36 and the cleaning mechanism 5 are distributed at intervals.
[0036] Specifically, during use, by turning on the switch of the water pump 35, the cleaning liquid enters the output pipe 36 through the connecting pipe 34 and is then sprayed out through the spray head 37, so that the cleaning liquid performs a water pressure flushing on the ink tray and is used in conjunction with the cleaning mechanism 5, making it more convenient to remove the attached ink on the ink tray and greatly improving the cleaning efficiency of the ink tray.
[0037] The rotating mechanism 2 includes a first motor 21, a rotating shaft 22 and a rotating plate 23. The first motor 21 is fixedly installed on the top of the cleaning tank 1. The output end of the first motor 21 is fixedly connected to the rotating shaft 22. The rotating plate 23 is fixedly sleeved outside the rotating shaft 22. An arc-shaped groove is formed at the edge of the rotating plate 23, and the arc-shaped groove is connected to the arc-shaped frame 53 in a limiting manner.
[0038] Specifically, during use, turn on the switch of the first motor 21, so that the rotating shaft 22 drives the rotating plate 23 to rotate, so that the clamping mechanism 4 can rotate, and further the ink tray can rotate, and it can repeatedly pass through different cleaning mechanisms 5 for multiple cleanings, avoiding residues adhering to the surface of the ink tray, making the cleaning efficiency higher.
[0039] The clamping mechanism 4 includes a connecting rod 41, a clamping frame 42, a limiting block 43, a threaded rod 44, a bottom plate 45, a telescopic rod 46 and a first spring 47. One end of the connecting rod 41 is fixedly connected to the outer wall of the rotating shaft 22, and the other end of the connecting rod 41 is fixedly connected to the clamping frame 42. The threaded rod 44 is movably inserted into the inner sides of the two side walls of the clamping frame 42. One end of the threaded rod 44 is connected to the limiting block 43 through a bearing. One end of the telescopic rod 46 is inserted into the inner bottom wall of the clamping frame 42 in a limiting manner. The first spring 47 is movably sleeved outside the telescopic rod 46, and the other end of the telescopic rod 46 is fixedly connected to the bottom plate 45.
[0040] Specifically, during use, install the ink tray on the top of the bottom plate 45. Then, under the action of the first spring 47, the telescopic rod 46 clamps and fixes the upper and lower sides of the ink tray. Adjust the threaded rod 44, so that the limiting block 43 clamps and limits the left and right sides of the ink tray, thus preventing the ink tray from shaking or falling off during cleaning, making the ink tray more stable during cleaning. At the same time, a limiting baffle is provided at the rear side of the clamping frame 42, making the installation of the ink tray more stable.
[0041] In summary, compared with the prior art, the ink tray cleaning device of the intaglio printing press has at least the following beneficial effects: By providing a cleaning mechanism 5, during use, the rotating mechanism 2 drives the rotating plate and the clamping mechanism 4 to rotate. When the arc-shaped groove of the rotating plate 23 rotates to a position adapted to the arc-shaped frame 53, under the action of the second spring 511 and the limiting rod 52, the arc-shaped frame 53 is inserted into the arc-shaped groove, enabling the two to be inserted and matched. Then, the connecting frame 56 drives the limiting frame 50 to move, so that the cleaning roller 57 and the wiping pad 58 are in contact with the ink tray to be cleaned, making the cleaning effect of the ink tray better. At the same time, by turning on the switch of the second motor 512, the lead screw 510 can drive the moving plate 513 to move up and down, so that the cleaning roller 57 and the wiping pad 58 can clean different positions of the ink tray, making the device applicable to ink trays of different sizes. At the same time, by turning on the switch of the third motor 514, the wiping pad 58 rotates, and rolling friction cleaning can be performed on the ink tray, completely removing ink residues and impurities, not easily leaving residues, greatly improving the cleaning efficiency, and making the cleaning effect better.
[0042] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims
1. An ink tray cleaning device for an intaglio printing press, characterized in that, Including: A cleaning tank (1), a cleaning mechanism (3) is arranged on the top of the cleaning tank (1) and extends to the inside of the cleaning tank (1), a rotating mechanism (2) is arranged on the top of the cleaning tank (1), a clamping mechanism (4) is arranged on the outside of the rotating mechanism (2), and a cleaning mechanism (5) is arranged on the inner wall of the cleaning tank (1); The cleaning mechanism (5) includes a sleeve (51), a limiting rod (52), an arc-shaped frame (53), a mounting frame (54), a moving block (55), a connecting frame (56), a cleaning roller (57), a wiping pad (58), an output shaft (59), a limiting frame (50), a lead screw (510) and a second spring (511). The sleeve (51) is fixedly installed on the inner wall of the cleaning tank (1). One end of the limiting rod (52) is inserted into the sleeve (51) in a limited manner, and the other end of the limiting rod (52) is fixedly connected to the arc-shaped frame (53). The connecting frame (56) is fixedly installed at the bottom of the arc-shaped frame (53). The limiting frame (50) is fixedly installed at the bottom of the connecting frame (56). The mounting frame (54) is fixedly installed on the outer wall of one side of the limiting frame (50). A second motor (512) is fixedly installed on the top of the mounting frame (54). The output end of the second motor (512) is fixedly connected to the lead screw (510). The moving block (55) is movably sleeved outside the lead screw (510). A moving plate (513) is fixedly installed on the outer wall of one side of the moving block (55). A third motor (514) is fixedly installed inside the moving plate (513). The output end of the third motor (514) is fixedly connected to the wiping pad (58). A vertical plate is fixedly installed on the outer wall of one side of the moving plate (513). Both ends of the cleaning roller (57) are respectively inserted into the two vertical plates in a movable manner, and the cleaning roller (57) is located on the upper and lower sides of the wiping pad (58).
2. The cleaning device for the ink tray of an intaglio printing press according to claim 1, wherein The second spring (511) is movably arranged inside the sleeve (51), and one end of the limiting rod (52) is clamped with the second spring (511).
3. The anilox roll cleaning device for a gravure printing press according to claim 2, characterized in that, Support legs (12) are fixedly installed at the bottom of the cleaning tank (1), foot pads (13) are fixedly installed at the bottom ends of the support legs (12), a waste liquid tray (14) is fixedly installed on the inner bottom wall of the cleaning tank (1), a liquid outlet pipe (15) is fixedly installed inside the bottom wall of the waste liquid tray (14) and extends to the bottom of the cleaning tank (1), and a box door (11) is installed on the front part of the cleaning tank (1) through a hinge.
4. The cleaning device for the ink tray of a gravure printing press according to claim 3, characterized in that, The cleaning mechanism (3) includes support columns (31), a top plate (32), a liquid storage tank (33), a connecting pipe (34), a water pump (35), an output pipe (36) and a spray head (37). The support columns (31) are fixedly installed on the top of the cleaning tank (1). The liquid storage tank (33) is fixedly installed at the top end of the support columns (31). The water pump (35) is fixedly installed on the top of the cleaning tank (1). The input end of the water pump (35) is fixedly connected to one end of the connecting pipe (34), and the other end of the connecting pipe (34) is communicated with the liquid storage tank (33).
5. The cleaning device for the ink tray of a gravure printing press according to claim 4, characterized in that, The output end of the water pump (35) is connected to the output pipe (36) and extends into the interior of the cleaning tank (1). The spray head (37) is fixedly installed inside the pipe wall of the output pipe (36), and the output pipe (36) and the cleaning mechanism (5) are spaced apart.
6. The cleaning device for the ink tray of a gravure printing press according to claim 1, wherein, The rotating mechanism (2) includes a first motor (21), a rotating shaft (22), and a rotating plate (23). The first motor (21) is fixedly installed on the top of the cleaning tank (1). The output end of the first motor (21) is fixedly connected to the rotating shaft (22). The rotating plate (23) is fixedly sleeved outside the rotating shaft (22). An arc-shaped groove is formed at the edge of the rotating plate (23), and the arc-shaped groove is connected to the arc-shaped frame (53) in a limiting manner.
7. The cleaning device for the ink tray of the intaglio printing press according to claim 6, characterized in that, The clamping mechanism (4) includes a connecting rod (41), a clamping frame (42), a limiting block (43), a threaded rod (44), a bottom plate (45), a telescopic rod (46), and a first spring (47). One end of the connecting rod (41) is fixedly connected to the outer wall of the rotating shaft (22), and the other end of the connecting rod (41) is fixedly connected to the clamping frame (42). The threaded rod (44) is movably inserted into the inner sides of the two side walls of the clamping frame (42). One end of the threaded rod (44) is connected to the limiting block (43) through a bearing. One end of the telescopic rod (46) is inserted into the inner bottom wall of the clamping frame (42) in a limiting manner. The first spring (47) is movably sleeved outside the telescopic rod (46), and the other end of the telescopic rod (46) is fixedly connected to the bottom plate (45).