Buffer structure for high-precision digital embossing machine

Abstract

The utility model relates to the technical field of digital embossing machines, and discloses a buffer structure for a high-precision digital embossing machine, which comprises a digital embossing machine and a buffer base. Various patterns or textures can be accurately manufactured on the surface of a material through the digital embossing machine, buffering and vibration reduction can be conducted on the bottom of the digital embossing machine through the buffering base, the vibration reduction effect on the machine body can be improved through the vibration reduction assembly, vibration reduction can be conducted on the two workbenches through the two pressure reduction assemblies, and the working efficiency is improved. The damping effect on the two workbenches can be further improved through a round rod, a sliding plate, a damping spring, a first buffering pad and a second buffering pad, the using effect of a movable plate and a connecting plate can be improved through four limiting blocks and two control blocks, and the effects that the buffering effect of the digital embossing machine in the embossing process is improved, and the service life is prolonged are achieved; the problem that the buffering effect of a high-precision digital embossing machine is not good enough is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital embossing machines, and in particular relates to a buffer structure for high-precision digital embossing machines. Background Art

[0002] High-precision digital embossing machine is a kind of precision equipment used to create various patterns or textures on the surface of materials. It uses digital control system and high-precision mechanical structure to achieve precise control of parameters such as pressure, position, speed, etc., thereby achieving high-quality embossing effect.

[0003] During the embossing process, the pressure applied by the embossing head on the surface of the material will generate a certain impact force. At the same time, the movement of the embossing head and the workbench will also cause vibration. The vibration will cause the embossing head to be unstable during the embossing process, thereby affecting the accuracy and consistency of the embossing, which may cause the embossed pattern to be unclear, uneven or defective. Excessive vibration may cause damage to the material, especially for brittle materials. Vibration will increase the stress of the material and may cause the material to break, tear or crack. In order to improve the use effect of the high-precision digital embossing machine, the high-precision digital embossing machine needs to be buffered, and the buffering effect of the existing high-precision digital embossing machine is not good enough. The problem with the above technology is that the buffering effect of the high-precision digital embossing machine is not good enough. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a buffer structure for a high-precision digital embossing machine, which can overcome the above problems or at least partially solve the above problems.

[0005] The utility model is implemented as follows: a buffer structure for a high-precision digital embossing machine comprises a digital embossing machine and a buffer base, wherein the digital embossing machine comprises a machine body, an embossing roller, two brackets, a control end and two workbenches, wherein the embossing roller is installed inside the machine body, the opposite sides of the two brackets are fixedly connected to the opposite ends inside the machine body, the control end is installed on the left side of the front side of the machine body, the sides of the two workbenches close to the machine body are fixedly connected to the machine body, the buffer base is located at the bottom of the machine body, the buffer base comprises a connecting plate, a supporting seat, a movable plate and a plurality of dampers, the top of the connecting plate is fixedly connected to the bottom of the machine body, the surface of the connecting plate is movably connected to the inside of the supporting seat, the tops of the plurality of dampers at the top are fixedly connected to the bottom of the connecting plate by bolts, the bottoms of the plurality of dampers at the bottom are fixedly connected to the bottom inside the supporting seat by bolts, the bottoms of the plurality of dampers at the top are fixedly connected to the top of the movable plate, and the tops of the plurality of dampers at the bottom are fixedly connected to the top of the movable plate;

[0006] The digital embossing machine is used to accurately produce various patterns or textures on the surface of the material;

[0007] The buffer base is used for buffering and reducing vibration of the bottom of the digital embossing machine.

[0008] In order to improve the vibration reduction effect of the digital embossing machine, preferably, the movable plate is located inside the support seat, a vibration reduction assembly is arranged on the top of the movable plate, and pressure reduction assemblies are arranged on opposite sides of the bottom of the two workbenches, and an anti-slip pad is fixedly connected to the bottom of the support seat, and baffles are fixedly connected to opposite sides of the two workbenches. Through the vibration reduction assembly and the two pressure reduction assemblies, during the embossing process, the pressure applied by the embossing roller on the surface of the material will generate a certain impact force, and the movement of the embossing head and the workbench will also cause vibration. The vibration reduction assembly and the two pressure reduction assemblies can reduce the vibration generated by the embossing of the embossing roller, and the two baffles can reduce the collision of the two pressure reduction assemblies. The anti-slip pad can make the contact between the support seat and the ground more stable.

[0009] In order to improve the vibration reduction effect of the machine body, preferably, the vibration reduction assembly includes two first matching blocks, multiple matching rods, two second matching blocks and multiple vibration reduction springs, the tops of the two first matching blocks are fixedly connected to the bottom of the connecting plate, the tops inside the multiple matching rods are movably connected to the front and rear sides of the two first matching blocks, the bottoms inside the multiple matching rods are movably connected to the front and rear sides of the two second matching blocks, the bottoms of the two second matching blocks are movably connected to the left and right sides of the top of the movable plate, and the opposite sides of the multiple vibration reduction springs are fixedly connected to the opposite ends of the two second matching blocks, respectively. Through the vibration reduction assembly, when the machine body drives the connecting plate to move downward, the connecting plate will drive the two first matching blocks to move downward, the downward movement of the two first matching blocks will cause the multiple matching rods to move downward and rotate, the movement of the multiple matching rods will cause the two second matching blocks to move toward the opposite ends, and cause the multiple vibration reduction springs to deform, so that under the elastic action of the multiple vibration reduction springs, the vibration reduction effect of the machine body is improved.

[0010] In order to reduce vibration of the front workbench, preferably, the front side decompression assembly includes two long rods, a support plate, two hydraulic structures, a bottom plate and two decompression springs, the tops of the two long rods are fixedly connected to the left and right sides of the bottom of the front workbench respectively, the bottoms of the two long rods are fixedly connected to the top of the support plate, the tops of the output ends of the two hydraulic structures are fixedly connected to the bottom of the support plate, the bottoms of the two hydraulic structures are fixedly connected to the top of the bottom plate, the rear side of the bottom plate is fixedly connected to the bottom of the front side of the support seat, the two decompression springs are both sleeved on the surfaces of the two long rods, and the bottoms of the two decompression springs are fixedly connected to the top of the support plate. Through the decompression assembly, the interiors of the two hydraulic structures can play a buffering effect by injecting hydraulic oil. When the front workbench vibrates downward, the two long rods and the support plate will move downward. The movement of the support plate will cause the two decompression springs to deform and the two hydraulic structures to be subjected to pressure. Under the elastic action of the two decompression springs and the characteristics of the two hydraulic structures, the front workbench is reduced in vibration.

[0011] In order to improve the vibration reduction effect on the front workbench, preferably, two round rods are fixedly connected to the top of the base plate, the surfaces of the two round rods are slidably connected to the inside of the support plate, the tops of the two round rods are fixedly connected to a sliding plate, the tops of the two decompression springs are fixedly connected to the bottom of the sliding plate, the left and right sides of the interior of the sliding plate are respectively slidably connected to the surfaces of the two long rods, the tops of the two round rod surfaces are sleeved with damping springs, the tops of the two damping springs are fixedly connected to the bottom of the sliding plate, and the bottoms of the two damping springs are fixedly connected to the top of the support plate, through the two round rods, the sliding plate and the two damping springs, the two damping springs will be deformed when the support plate moves downward, and under the elastic action of the two damping springs, the vibration reduction effect on the workbench is improved.

[0012] In order to control the moving range of the movable plate and the connecting plate, preferably, the front and rear sides and left and right sides of the bottom of the support seat are fixedly connected to limit blocks, the surfaces of the four limit blocks are respectively movably connected to the four corners inside the connecting plate, and the left and right sides of the movable plate are fixedly connected with control blocks, and the interiors of the two control blocks are respectively movably connected to the surfaces of the four limit blocks. Through the four limit blocks and two control blocks, the movable plate and the connecting plate can only move vertically upward or downward inside the support seat, thereby achieving a limiting effect and achieving a better use effect.

[0013] In order to further improve the vibration reduction effect on the front workbench, preferably, the tops of the two long rod surfaces are respectively provided with a first buffer pad, the tops of the two first buffer pads are respectively fixedly connected to the bottom of the front workbench, the bottoms of the two first buffer pads are respectively fixedly connected to the top of the sliding plate, the bottoms of the two round rod surfaces are respectively provided with a second buffer pad, the bottoms of the two second buffer pads are respectively fixedly connected to the top of the bottom plate, and the tops of the two second buffer pads are respectively fixedly connected to the bottom of the support plate, through the two first buffer pads and the two second buffer pads, when the front workbench vibrates downward, the impact force will be reduced through the two first buffer pads, and when the support plate vibrates downward, the impact force will be reduced through the two second buffer pads.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model is provided with structural components such as a digital embossing machine, a machine body, an embossing roller, a bracket, a control end, a workbench and a buffer base. The digital embossing machine can accurately produce various patterns or textures on the surface of a material, the bottom of the digital embossing machine can be buffered and vibration-reduced by the buffer base, the vibration-reducing effect of the machine body can be improved by the vibration-reducing component, the two workbenches can be vibration-reduced by the two decompression components, the vibration-reducing effect of the two workbenches can be further improved by the round rod, the sliding plate, the damping spring, the first buffer pad and the second buffer pad, the use effect of the movable plate and the connecting plate can be improved by the four limit blocks and the two control blocks, thereby achieving the effect of improving the buffering effect of the digital embossing machine during the embossing process and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0017] Figure 2 It is a three-dimensional structural diagram of a decompression assembly provided by an embodiment of the utility model;

[0018] Figure 3 It is an exploded perspective view of a local structure provided by an embodiment of the utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the interior of the support base provided by the embodiment of the utility model;

[0020] Figure 5 It is a three-dimensional structural diagram of a buffer base provided by an embodiment of the utility model;

[0021] Figure 6 It is a three-dimensional structural diagram of a vibration reduction assembly provided in an embodiment of the utility model.

[0022] In the figure: 1. digital embossing machine; 101. machine body; 102. embossing roller; 103. bracket; 104. control end; 105. workbench; 2. buffer base; 201. connecting plate; 202. support seat; 203. movable plate; 204. damper; 3. vibration reduction assembly; 301. first matching block; 302. matching rod; 303. second matching block; 304. vibration reduction spring; 4. pressure reduction assembly; 401. long rod; 402. support plate; 403. hydraulic structure; 404. bottom plate; 405. pressure reduction spring; 5. anti-skid pad; 6. baffle; 7. round rod; 8. sliding plate; 9. damping spring; 10. limit block; 11. control block; 12. first buffer pad; 13. second buffer pad. DETAILED DESCRIPTION

[0023] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0024] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 6As shown, a buffer structure for a high-precision digital embossing machine provided by an embodiment of the utility model comprises a digital embossing machine 1 and a buffer base 2. The digital embossing machine 1 comprises a body 101, an embossing roller 102, two brackets 103, a control end 104 and two workbenches 105. The embossing roller 102 is installed inside the body 101. The opposite sides of the two brackets 103 are fixedly connected to the opposite ends inside the body 101. The control end 104 is installed on the left side of the front side of the body 101. The sides of the two workbenches 105 close to the body 101 are fixedly connected to the body 101. The buffer base 2 is located at the bottom of the body 101. The buffer base 2 comprises a connecting plate 201, a supporting seat 202, a movable plate 203 and a plurality of dampers 204. The connecting plate 20 The top of the connecting plate 201 is fixedly connected to the bottom of the body 101, the surface of the connecting plate 201 is movably connected to the inside of the support seat 202, the tops of the multiple dampers 204 on the top are fixedly connected to the bottom of the connecting plate 201 by bolts, the bottoms of the multiple dampers 204 on the bottom are fixedly connected to the bottom of the inside of the support seat 202 by bolts, the bottoms of the output ends of the multiple dampers 204 on the top are fixedly connected to the top of the movable plate 203, and the tops of the output ends of the multiple dampers 204 on the bottom are fixedly connected to the top of the movable plate 203; the digital embossing machine 1 is used to accurately manufacture various patterns or textures on the surface of the material. The buffer base 2 is used to buffer and reduce vibration at the bottom of the digital embossing machine 1. In order to improve the vibration reduction effect of the digital embossing machine 1, the movable plate 203 is positioned Inside the support seat 202, a vibration reduction component 3 is arranged on the top of the movable plate 203, and a decompression component 4 is arranged on the opposite side of the bottom of the two workbenches 105. The bottom of the support seat 202 is fixedly connected with an anti-skid pad 5, and the opposite side of the two workbenches 105 are fixedly connected with a baffle 6. During the embossing process, the pressure applied by the embossing roller 102 on the surface of the material will generate a certain impact force. At the same time, the movement of the embossing head and the workbench 105 will also cause vibration. The vibration reduction component 3 and the two decompression components 4 can reduce the vibration generated by the embossing of the embossing roller 102. The two baffles 6 can reduce the collision of the two decompression components 4, and the anti-skid pad 5 can make the contact between the support seat 202 and the ground more stable. In order to improve the vibration reduction effect on the machine body 101, the vibration reduction assembly 3 includes two first matching blocks 301, a plurality of matching rods 302, two second matching blocks 303 and a plurality of vibration reduction springs 304. The tops of the two first matching blocks 301 are fixedly connected to the bottom of the connecting plate 201, the tops inside the plurality of matching rods 302 are movably connected to the front and rear sides of the two first matching blocks 301, the bottoms inside the plurality of matching rods 302 are movably connected to the front and rear sides of the two second matching blocks 303, the bottoms of the two second matching blocks 303 are movably connected to the left and right sides of the top of the movable plate 203, and the opposite sides of the plurality of vibration reduction springs 304 are fixedly connected to the opposite ends of the two second matching blocks 303. Through the vibration reduction assembly 3,When the machine body 101 drives the connecting plate 201 to move downward, the connecting plate 201 will drive the two first matching blocks 301 to move downward. The downward movement of the two first matching blocks 301 will cause the multiple matching rods 302 to move downward and rotate. The movement of the multiple matching rods 302 will cause the two second matching blocks 303 to move toward the opposite end and cause the multiple damping springs 304 to deform. Under the elastic action of the multiple damping springs 304, the damping effect of the machine body 101 is improved. In order to reduce the vibration of the front workbench 105, the front decompression assembly 4 includes two long rods 401, a support plate 402, two hydraulic structures 403, a bottom plate 404 and two decompression springs 405. The tops of the two long rods 401 are respectively connected to the left and right sides of the bottom of the front workbench 105. The two hydraulic structures 403 are fixedly connected on the side and right sides, the bottoms of the two long rods 401 are fixedly connected to the top of the support plate 402, the tops of the output ends of the two hydraulic structures 403 are fixedly connected to the bottom of the support plate 402, the bottoms of the two hydraulic structures 403 are fixedly connected to the top of the bottom plate 404, the rear side of the bottom plate 404 is fixedly connected to the bottom of the front side of the support seat 202, the two decompression springs 405 are sleeved on the surface of the two long rods 401, the bottoms of the two decompression springs 405 are fixedly connected to the top of the support plate 402, through the decompression component 4, the interior of the two hydraulic structures 403 can be injected with hydraulic oil to achieve a buffering effect, when the front workbench 105 vibrates downward, the two long rods 401 and the support plate 402 will move downward, and the movement of the support plate 402 The two pressure-reducing springs 405 will be deformed and the two hydraulic structures 403 will be subjected to pressure. Under the elastic action of the two pressure-reducing springs 405 and the characteristics of the two hydraulic structures 403, the front workbench 105 is damped. In order to improve the damping effect on the front workbench 105, the top of the bottom plate 404 is fixedly connected to two round rods 7, the surfaces of the two round rods 7 are both slidably connected to the inside of the support plate 402, the tops of the two round rods 7 are fixedly connected to a sliding plate 8, the tops of the two pressure-reducing springs 405 are both fixedly connected to the bottom of the sliding plate 8, the left and right sides of the inside of the sliding plate 8 are respectively slidably connected to the surfaces of the two long rods 401, the tops of the surfaces of the two round rods 7 are both sleeved with damping springs 9, the tops of the two damping springs 9 are both slidably connected to the bottom of the sliding plate 8 The bottom of the two damping springs 9 are fixedly connected to the top of the support plate 402. Through the two round rods 7, the sliding plate 8 and the two damping springs 9, the two damping springs 9 will be deformed when the support plate 402 moves downward. Under the elastic action of the two damping springs 9, the vibration reduction effect on the workbench 105 is improved. In order to control the movement range of the movable plate 203 and the connecting plate 201, the front and rear sides and the left and right sides of the bottom of the support seat 202 are fixedly connected to the limiting blocks 10, and the surfaces of the four limiting blocks 10 are respectively movably connected to the four corners of the inside of the connecting plate 201. The left and right sides of the movable plate 203 are fixedly connected with the control blocks 11, and the interiors of the two control blocks 11 are respectively movably connected to the surfaces of the four limiting blocks 10.Through four limit blocks 10 and two control blocks 11, the movable plate 203 and the connecting plate 201 can only move vertically upward or downward inside the support seat 202, which plays a limiting effect and has a better use effect. In order to further improve the vibration reduction effect on the front workbench 105, the top of the two long rods 401 is sleeved with a first buffer pad 12, the top of the two first buffer pads 12 is fixedly connected to the bottom of the front workbench 105, the bottom of the two first buffer pads 12 is fixedly connected to the top of the sliding plate 8, and the bottom of the two round rods 7 is sleeved with a second buffer pad 13, the bottom of the two second buffer pads 13 is fixedly connected to the top of the bottom plate 404, and the top of the two second buffer pads 13 is fixedly connected to the bottom of the support plate 402. Through the two first buffer pads 12 and the two second buffer pads 13, when the front workbench 105 vibrates downward, the impact force will be reduced by the two first buffer pads 12, and when the support plate 402 vibrates downward, the impact force will be reduced by the two second buffer pads 13.

[0026] The working principle of this utility model:

[0027] When the digital embossing machine 1 generates vibration during the embossing process, the workbench 105 vibrates downward, causing the two long rods 401 and the support plate 402 to move downward. The movement of the support plate 402 causes the two decompression springs 405 to deform and the two hydraulic structures 403 to be subjected to pressure. Under the elastic action of the two decompression springs 405 and the characteristics of the two hydraulic structures 403, the workbench 105 is damped. When the support plate 402 moves downward, the two damping springs 9 are deformed. Under the elastic action of the two damping springs 9, the vibration reduction effect of the workbench 105 is improved. When the workbench 105 vibrates downward, the impact force is reduced by the two first buffer pads 12. The support plate 40 When the machine body 101 vibrates downward, the impact force will be reduced by the two second buffer pads 13. When the machine body 101 vibrates, the connecting plate 201 will move downward, and the connecting plate 201 will drive the two first matching blocks 301 to move downward. The downward movement of the two first matching blocks 301 will cause the multiple matching rods 302 to move downward and rotate. The movement of the multiple matching rods 302 will cause the two second matching blocks 303 to move toward the opposite end and cause the multiple damping springs 304 to deform. Under the elastic action of the multiple damping springs 304, the damping effect on the machine body 101 is improved. When the connecting plate 201 and the movable plate 203 vibrate, the bottom of the machine body 101 will be damped through the multiple dampers 204.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device.

[0029] The above description is only a preferred embodiment of the utility model, and does not constitute any form of limitation to the utility model. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent will not depart from the scope of the technical solution of the utility model.

Claims

1. A buffer structure for a high-precision digital embossing machine, comprising a digital embossing machine (1) and a buffer base (2), characterized in that: The digital embossing machine (1) comprises a machine body (101), an embossing roller (102), two brackets (103), a control end (104) and two workbenches (105); the embossing roller (102) is installed inside the machine body (101); opposite sides of the two brackets (103) are fixedly connected to opposite ends inside the machine body (101); the control end (104) is installed on the left side of the front side of the machine body (101); the sides of the two workbenches (105) close to the machine body (101) are fixedly connected to the machine body (101); the buffer base (2) is located at the bottom of the machine body (101); the buffer base (2) comprises a connecting plate (201), a supporting seat (202), A movable plate (203) and a plurality of dampers (204), wherein the top of the connecting plate (201) is fixedly connected to the bottom of the machine body (101), the surface of the connecting plate (201) is movably connected to the inside of the support seat (202), the tops of the plurality of dampers (204) at the top are fixedly connected to the bottom of the connecting plate (201) by bolts, the bottoms of the plurality of dampers (204) at the bottom are fixedly connected to the bottom of the inside of the support seat (202) by bolts, the bottoms of the output ends of the plurality of dampers (204) at the top are fixedly connected to the top of the movable plate (203), and the tops of the output ends of the plurality of dampers (204) at the bottom are fixedly connected to the top of the movable plate (203); The digital embossing machine (1) is used to accurately produce various patterns or textures on the surface of a material; The buffer base (2) is used for buffering and reducing vibration of the bottom of the digital embossing machine (1).

2. A buffer structure for a high-precision digital embossing machine as claimed in claim 1, characterized in that: The movable plate (203) is located inside the support seat (202), a vibration reduction assembly (3) is arranged on the top of the movable plate (203), a decompression assembly (4) is arranged on opposite sides of the bottoms of the two workbenches (105), an anti-slip pad (5) is fixedly connected to the bottom of the support seat (202), and a baffle (6) is fixedly connected to opposite sides of the two workbenches (105).

3. A buffer structure for a high-precision digital embossing machine as claimed in claim 2, characterized in that: The vibration reduction assembly (3) comprises two first matching blocks (301), a plurality of matching rods (302), two second matching blocks (303) and a plurality of vibration reduction springs (304); the tops of the two first matching blocks (301) are fixedly connected to the bottom of the connecting plate (201); the tops inside the plurality of matching rods (302) are movably connected to the front and rear sides of the two first matching blocks (301); the bottoms inside the plurality of matching rods (302) are movably connected to the front and rear sides of the two second matching blocks (303); the bottoms of the two second matching blocks (303) are movably connected to the left and right sides of the top of the movable plate (203); and the opposite sides of the plurality of vibration reduction springs (304) are fixedly connected to the opposite ends of the two second matching blocks (303).

4. The buffer structure for a high-precision digital embossing machine according to claim 2, characterized in that: The front pressure reducing assembly (4) comprises two long rods (401), a support plate (402), two hydraulic structures (403), a bottom plate (404) and two pressure reducing springs (405); the tops of the two long rods (401) are respectively fixedly connected to the left and right sides of the bottom of the front workbench (105); the bottoms of the two long rods (401) are fixedly connected to the top of the support plate (402); the tops of the output ends of the two hydraulic structures (403) are fixedly connected to the bottom of the support plate (402); the bottoms of the two hydraulic structures (403) are fixedly connected to the top of the bottom plate (404); the rear side of the bottom plate (404) is fixedly connected to the bottom of the front side of the support seat (202); the two pressure reducing springs (405) are sleeved on the surfaces of the two long rods (401); and the bottoms of the two pressure reducing springs (405) are fixedly connected to the top of the support plate (402).

5. A buffer structure for a high-precision digital embossing machine as claimed in claim 4, characterized in that: Two round rods (7) are fixedly connected to the top of the bottom plate (404), the surfaces of the two round rods (7) are slidably connected to the inside of the support plate (402), the tops of the two round rods (7) are fixedly connected to a sliding plate (8), the tops of the two decompression springs (405) are fixedly connected to the bottom of the sliding plate (8), the left and right sides of the inside of the sliding plate (8) are slidably connected to the surfaces of the two long rods (401), the tops of the surfaces of the two round rods (7) are sleeved with damping springs (9), the tops of the two damping springs (9) are fixedly connected to the bottom of the sliding plate (8), and the bottoms of the two damping springs (9) are fixedly connected to the top of the support plate (402).

6. The buffer structure for a high-precision digital embossing machine according to claim 1, characterized in that: The front and rear sides and the left and right sides of the bottom of the support seat (202) are fixedly connected to the limiting blocks (10), the surfaces of the four limiting blocks (10) are movably connected to the four corners of the inside of the connecting plate (201), the left and right sides of the movable plate (203) are fixedly connected to the control blocks (11), and the insides of the two control blocks (11) are movably connected to the surfaces of the four limiting blocks (10).

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