Curved surface roller coating robot

Abstract

The invention belongs to the technical field of roller coating, and discloses a curved surface roller coating robot which comprises a workbench, a mechanical arm is fixedly connected to one side of the top of the workbench, and when a coating mechanism gets close to the top of a curved plate, an arc-shaped plate firstly makes contact with the top of the curved plate and is subjected to the counter-acting force of the curved plate; the arc-shaped plates drive the first sliding rods to slide along the inner wall of the annular frame, the multiple arc-shaped plates get close to one another, and therefore a circle smaller than the outer wall of the coating roller is defined, in this way, the contact face between the coating roller and the curved plate can be adjusted, the pressure of the coating roller on the curved plate is stabilized, and as the arc-shaped plates get close to one another, the coating roller can rotate around the curved plate. The surface, making contact with the curved plate, of the coating roller becomes smaller, so that the coating roller can conduct coating on the curved plate more finely, coating can be more uniform through adjustment, and particularly, the quality and consistency of a coating can be guaranteed when the curved plate has different curvatures.

Description

Technical Field

[0001] The present invention belongs to the technical field of roll coating, and specifically relates to a curved surface roll coating robot. Background Art

[0002] A roll coating robot is a robot used for automated coating processes, mainly by a roller or a coating roller to evenly coat the surface of an object with paint. It is usually used in large-scale production to replace manual painting and improve painting efficiency, quality, and consistency.

[0003] In the prior art when performing roll coating on a curved panel, usually the robot is started to move the coating roller to the top of the curved panel, and then the robotic arm is moved to make the coating roller perform roll coating work. In this process, due to different parts of the curved surface shape, and the outer wall of the coating roller is made of a flexible material, the pressure during the robot's roll coating may be uneven, resulting in uneven paint distribution. Excessive pressure may cause the paint to be too thick or too thin, affecting the coating quality. Summary of the Invention

[0004] To solve the problem of uneven paint distribution proposed in the above background art, and to prevent the pressure of the robot manipulating the coating roller in contact with the curved panel from being sometimes too large and sometimes too small, and being unable to evenly coat the coating surface of the curved panel, the present invention provides a curved surface roll coating robot.

[0005] To achieve the above object, the present invention provides the following technical solution: A curved surface roll coating robot, including a workbench, on one side of the top of the workbench is fixedly connected with a robotic arm, on the side wall of the end of the robotic arm away from the workbench is fixedly connected with a material storage shell, and on both sides of the material storage shell are respectively fixedly connected with fixing plates, and further includes; A paint spraying mechanism, which is arranged on the top of the material storage shell; A coating mechanism, the coating mechanism includes a rotating shaft rotatably connected between two fixing plates, on the outer wall of the middle end of the rotating shaft is fixedly connected with a paint roller, and at both ends of the rotating shaft are provided with limiting components for limiting the coating pressure of the paint roller.

[0006] Preferably, the paint spraying mechanism includes a paint pump fixedly connected to the top of the material storage shell, the output end of the paint pump is communicated with the inside of the material storage shell, on both sides of the material storage shell are respectively communicated with elbow pipes, the end of the elbow pipe away from the material storage shell is communicated with a conversion shell, there is one conversion shell, the top of the conversion shell is fixedly connected to the bottom of the material storage shell, and the bottom of the conversion shell is communicated with a discharging device.

[0007] Preferably, the limiting component includes annular frames fixedly connected to both ends of the rotating shaft. The outer walls of the annular frames are respectively penetrated and slidably connected with first sliding rods. One end of each first sliding rod is fixedly connected with a compression spring, and the end of the compression spring away from the first sliding rod is fixedly connected to one side of the inner wall of the annular frame. The end of the first sliding rod away from the compression spring is fixedly connected with an arc-shaped plate.

[0008] Preferably, one side wall of one end of the first sliding rod is rotatably connected with a first rotating plate. There are eight first rotating plates. One end of the first rotating plate away from the first sliding rod is rotatably connected with a diamond ring. There are two diamond rings. The inner walls of the diamond rings are slidably connected to the outer wall of one end of the rotating shaft. An annular groove is formed on one side of the outer wall of the diamond ring.

[0009] Preferably, a lifting component is arranged on the inner wall of the annular groove. The lifting component includes a sliding frame slidably connected to the top end of the inner wall of the annular groove. One end of the sliding frame is rotatably connected with a second rotating plate. One end of the second rotating plate away from the sliding frame is rotatably connected with a slider.

[0010] Preferably, a square groove is formed on one side of the fixed plate close to the material storage shell. One end outer wall of the slider is slidably connected to the inner wall of the square groove. The bottom of the slider is fixedly connected with a rack frame. The side wall of the rack frame is meshed with a toothed ring. The inner wall of the toothed ring is fixedly connected to the outer wall of one end of the rotating shaft.

[0011] Preferably, an auxiliary component is arranged at the bottom of the rack frame. The auxiliary component includes a fixed strip fixedly connected to the bottom of the rack frame. Two arc-shaped frame plates are respectively fixedly connected to both ends of the fixed strip. One side of the arc-shaped frame plate is penetrated and slidably connected with a second sliding rod.

[0012] Preferably, one side wall of one end of the second sliding rod is fixedly connected with a return spring. One end of the return spring is fixedly connected to the side wall of the arc-shaped frame plate. The end of the second sliding rod away from the return spring is fixedly connected with a special-shaped clamping plate. One side of the special-shaped clamping plate is in contact with the outer wall of one side of the coating roller. Limiting grooves are respectively formed at both ends of one side of the special-shaped clamping plate close to the second sliding rod.

[0013] Preferably, a moving block is slidably connected to the inner wall of the limiting groove. One end of the moving block is rotatably connected with a rotating bar. One end of the rotating bar away from the moving block is rotatably connected to the side wall of the arc-shaped frame plate. A clamping block is fixedly connected to the side wall of the moving block.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the spraying mechanism and the coating mechanism, the present invention starts the paint pump, so that the paint sprays the outer wall of the rotating paint roller through the discharging device. Subsequently, the robotic arm is started, and the paint roller in the coating mechanism driven by the robotic arm performs a rolling coating operation on the surface of the curved panel. When the coating mechanism approaches the top of the curved panel, the arc plate will first come into contact with the top of the curved panel. Subject to the reaction force of the curved panel, the arc plate drives the first sliding rod to slide along the inner wall of the annular frame, and multiple arc plates approach each other, thus enclosing a circle slightly smaller than the outer wall of the paint roller. Such a setting can adjust the contact surface between the paint roller and the curved panel, stabilize the pressure of the paint roller on the curved panel. As the arc plates approach each other, the surface of the paint roller in contact with the curved panel will become smaller, so that the paint roller can coat the curved panel more precisely. This adjustment can make the coating of the paint more uniform. Especially when facing different curvatures of the curved panel, it can ensure the quality and consistency of the coating.

[0015] Through the cooperation of the limiting component and the lifting component, when multiple first sliding rods approach each other, the rack frame in the lifting component moves upward. During the upward movement of the rack frame, it will come into contact with the outer wall of the gear ring, causing the gear ring to drive the rotating shaft to rotate. The rotating shaft drives the paint roller to rotate, applying an initial velocity to the paint roller, enabling the paint roller to rotate, preventing the force of contact between the paint roller and the curved panel from being insufficient to cause the paint roller to rotate by itself. And due to the multiple card slots provided on the outer wall of the arc plate, the friction between the arc plate and the top of the curved panel is increased, further improving the rotational stability of the paint roller, ensuring the uniform coating of the paint, and improving the coating effect.

[0016] Through the cooperation of the limiting component, the lifting component and the auxiliary component, during the overall rotation of the limiting component, since the sliding frame rotates on the inner wall of the annular groove, the upward movement of the lifting component will not be stuck when the limiting component rotates, improving the stability of the device operation. When the rack frame rises, the special-shaped clamping plate in the auxiliary component can slide along the curved outer wall of the paint roller, thereby leveling the paint on the outer wall of the paint roller, preventing the paint from being unevenly covered on the outer wall of the paint roller, making the coating of the paint roller on the curved panel more uniform. And during the upward movement of the special-shaped clamping plate, it is extruded by the curved surface of the paint roller, causing the special-shaped clamping plate to drive the second sliding rod to slide along the inner wall of the arc-shaped frame plate. At this time, the special-shaped clamping plate and the arc-shaped frame plate approach each other, causing the two clamping blocks to move away. When the arc plates enclose a circle, the clamping blocks can move to the outer wall of the arc plate to slightly position the arc plate, preventing the two special-shaped clamping plates from excessively squeezing the outer wall of the paint roller and affecting the paint coating of the paint roller. Description of the Drawings

[0017] Figure 1 It is a schematic side view of the whole of the present invention; Figure 2Schematic cross-sectional structure diagram of the storage shell of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of A in; Figure 4 Schematic cross-sectional structure diagram of the coating roller of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of B in; Figure 6 Schematic top view structure diagram of the fixing bar of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of C in; Figure 8 Schematic side view structure diagram of the arc-shaped frame plate of the present invention; Figure 9 Schematic front view structure diagram of the annular frame of the present invention.

[0018] In the figure: 1, workbench; 2, robotic arm; 3, storage shell; 4, fixing plate; 5, spraying mechanism; 6, coating mechanism; 51, coating pump; 52, elbow pipe; 53, conversion shell; 54, discharging device; 61, rotating shaft; 62, coating roller; 63, limiting component; 64, lifting component; 65, auxiliary component; 631, annular frame; 632, first sliding rod; 633, compression spring; 634, arc-shaped plate; 635, first rotating plate; 636, diamond ring; 637, annular groove; 641, sliding frame; 642, second rotating plate; 643, slider; 644, square groove; 645, rack frame; 646, toothed ring; 651, fixing bar; 652, arc-shaped frame plate; 653, second sliding rod; 654, return spring; 655, special-shaped clamping plate; 656, limiting groove; 657, moving block; 658, rotating bar; 659, clamping block. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] As Figures 1 to 9 shown, the present invention provides a curved surface roller coating robot, including a workbench 1, a robotic arm 2 is fixedly connected to one side of the top of the workbench 1, a storage shell 3 is fixedly connected to the side wall of the end of the robotic arm 2 far from the workbench 1, fixing plates 4 are respectively fixedly connected to both sides of the storage shell 3, and further includes; A spraying mechanism 5, the spraying mechanism 5 is arranged on the top of the storage shell 3; Coating mechanism 6, the coating mechanism 6 includes a rotating shaft 61 rotatably connected between two fixed plates 4. The outer wall of the middle end of the rotating shaft 61 is fixedly connected with a coating roller 62. Limit components 63 are arranged at both ends of the rotating shaft 61 for limiting the coating pressure of the coating roller 62.

[0021] With the above solution: When the coating mechanism 6 approaches the top of the curved panel, due to the reaction force of the curved panel, the outer wall of the limit component 63 is squeezed, forming a circle that is slightly smaller than the outer wall of the coating roller 62. This setting can adjust the contact surface between the coating roller 62 and the curved panel, stabilizing the pressure of the coating roller 62 on the curved panel. As the outer circle of the limit component 63 gradually becomes smaller, the surface of the coating roller 62 in contact with the curved panel will become smaller, so that the coating roller 62 can coat the curved panel more precisely. This adjustment can make the coating more uniform, especially when facing different curvatures of the curved panel, ensuring the quality and consistency of the coating.

[0022] As Figures 1 to 9 shown, the spraying mechanism 5 includes a coating pump 51 fixedly connected to the top of the storage shell 3. The output end of the coating pump 51 communicates with the inside of the storage shell 3. Elbow pipes 52 are respectively communicated on both sides of the storage shell 3. One end of the elbow pipe 52 away from the storage shell 3 is communicated with a conversion shell 53. There is one conversion shell 53. The top of the conversion shell 53 is fixedly connected to the bottom of the storage shell 3. The bottom of the conversion shell 53 is communicated with a discharger 54.

[0023] With the above solution: The setting of the discharger 54 can spray the flowing coating on the outer wall of the coating roller 62, facilitating the subsequent coating work of the coating roller.

[0024] The limit component 63 includes annular frames 631 fixedly connected to both ends of the rotating shaft 61. First sliding rods 632 respectively penetrate and are slidably connected to the outer wall around the annular frames 631. One end of the first sliding rod 632 is fixedly connected with a compression spring 633. The end of the compression spring 633 away from the first sliding rod 632 is fixedly connected to one side of the inner wall of the annular frame 631. The end of the first sliding rod 632 away from the compression spring 633 is fixedly connected with an arc-shaped plate 634.

[0025] One side wall of one end of the first sliding rod 632 is rotatably connected with a first rotating plate 635. There are eight first rotating plates 635. One end of the first rotating plate 635 away from the first sliding rod 632 is rotatably connected with a rhombic ring 636. There are two rhombic rings 636. The inner wall of the rhombic ring 636 is slidably connected to the outer wall of one end of the rotating shaft 61. An annular groove 637 is opened on one side of the outer wall of the rhombic ring 636.

[0026] The inner wall of the annular groove 637 is provided with a lifting component 64. The lifting component 64 includes a sliding frame 641 slidably connected to the top end of the inner wall of the annular groove 637. One end of the sliding frame 641 is rotatably connected to a second rotating plate 642, and one end of the second rotating plate 642 away from the sliding frame 641 is rotatably connected to a slider 643.

[0027] On one side of the fixing plate 4 close to the material storage shell 3, a square groove 644 is opened. One end outer wall of the slider 643 is slidably connected to the inner wall of the square groove 644. The bottom of the slider 643 is fixedly connected to a rack frame 645. The side wall of the rack frame 645 is meshed with a toothed ring 646. The inner wall of the toothed ring 646 is fixedly connected to one end outer wall of the rotating shaft 61.

[0028] Adopting the above scheme: The outer wall at the bottom end of the rack frame 645 is not provided with teeth because after the rack frame 645 rises to a certain position, it no longer makes the toothed ring 646 rotate meshingly, preventing the paint roller 62 from getting stuck during rotation, and improving the stability of the rotation and coating of the paint roller 62.

[0029] An auxiliary component 65 is arranged at the bottom of the rack frame 645. The auxiliary component 65 includes a fixing bar 651 fixedly connected to the bottom of the rack frame 645. Two arc-shaped frame plates 652 are respectively fixedly connected to both ends of the fixing bar 651. One side of the arc-shaped frame plate 652 penetrates and is slidably connected to a second sliding rod 653.

[0030] One end side wall of the second sliding rod 653 is fixedly connected to a return spring 654. One end of the return spring 654 is fixedly connected to the side wall of the arc-shaped frame plate 652. One end of the second sliding rod 653 away from the return spring 654 is fixedly connected to a special-shaped clamping plate 655. One side of the special-shaped clamping plate 655 is in contact with one side of the outer wall of the paint roller 62. Two ends of one side of the special-shaped clamping plate 655 close to the second sliding rod 653 are respectively provided with limiting grooves 656.

[0031] A moving block 657 is slidably connected to the inner wall of the limiting groove 656. One end of the moving block 657 is rotatably connected to a rotating bar 658. One end of the rotating bar 658 away from the moving block 657 is rotatably connected to the side wall of the arc-shaped frame plate 652. A clamping block 659 is fixedly connected to the side wall of the moving block 657.

[0032] Adopting the above scheme: The setting of the clamping block 659 is such that when it moves to the outer wall of the arc-shaped plate 634 that forms a circle, it can come into contact with the outer wall of the arc-shaped plate 634 and make a clamping contact with the arc-shaped plate 634, preventing the two special-shaped clamping plates 655 from excessively squeezing the outer wall of the paint roller 62 and affecting the paint coating of the paint roller 62.

[0033] The working principle and usage process of the present invention: Start the paint pump 51. The paint pump 51 injects air pressure into the interior of the material storage shell 3. The air pressure causes the paint inside the material storage shell 3 to enter the interior of the elbow 52. The paint enters the interior of the conversion shell 53 through the elbow 52. The paint enters the interior of the discharge device 54 through the conversion shell 53. The paint sprays onto the outer wall of the rotating paint roller 62 through the discharge device 54. Subsequently, start the robotic arm 2. The robotic arm 2 drives the material storage shell 3 to move. The material storage shell 3 drives the fixed plate 4 to move. The fixed plate 4 drives the coating mechanism 6 to move, enabling the paint roller 62 in the coating mechanism 6 to perform a rolling coating operation on the surface of the curved panel. When the coating mechanism 6 approaches the top of the curved panel, the arc-shaped plate 634 will first come into contact with the top of the curved panel. Subject to the reaction force of the curved panel, the arc-shaped plate 634 drives the first sliding rod 632 to slide along the inner wall of the annular frame 631. Multiple arc-shaped plates 634 move closer to each other, thus forming a circle slightly smaller than the outer wall of the paint roller 62. This setting can adjust the contact surface between the paint roller 62 and the curved panel, stabilizing the pressure of the paint roller 62 on the curved panel. As the arc-shaped plates 634 move closer to each other, the surface of the paint roller 62 in contact with the curved panel will become smaller, enabling the paint roller 62 to coat the curved panel more precisely. This adjustment can make the coating of the paint more uniform. Especially when facing different curvatures of the curved panel, it can ensure the quality and consistency of the coating.

[0034] When multiple first sliding rods 632 move closer to each other, the first sliding rod 632 drives the first rotating plate 635 to move. The first rotating plate 635 drives the diamond ring 636 to slide along the outer wall of the rotating shaft 61. The diamond ring 636 drives the second rotating plate 642 to move. The second rotating plate 642 drives the slider 643 to vertically move upward along the inner wall of the square groove 644. The slider 643 drives the rack frame 645 to move upward. During the upward movement of the rack frame 645, it will come into contact with the outer wall of the gear ring 646, causing the gear ring 646 to drive the rotating shaft 61 to rotate. The rotating shaft 61 drives the paint roller 62 to rotate, applying an initial velocity to the paint roller 62, enabling the paint roller 62 to rotate, preventing the force of the paint roller 62 in contact with the curved panel from being insufficient to cause the paint roller 62 to rotate by itself. Moreover, due to the multiple card slots provided on the outer wall of the arc-shaped plate 634, the friction between the arc-shaped plate 634 and the top of the curved panel is increased, further improving the rotational stability of the paint roller 62, ensuring the uniform coating of the paint, and improving the coating effect.

[0035] During the rotation of the overall position-limiting component 63, since the sliding frame 641 rotates on the inner wall of the annular groove 637, the upward movement of the lifting component 64 will not be jammed when the position-limiting component 63 rotates, improving the stability of the device operation. When the rack frame 645 rises, the rack frame 645 drives the fixed bar 651 to rise, the fixed bar 651 drives the arc-shaped frame plate 652 to rise, the arc-shaped frame plate 652 drives the second sliding rod 653 to rise, and the second sliding rod 653 drives the special-shaped clamping plate 655 to rise. The special-shaped clamping plate 655 slides along the curved outer wall of the coating roller 62, thereby leveling the coating on the outer wall of the coating roller 62, preventing the coating from being unevenly covered on the outer wall of the coating roller 62, and making the coating roller 62 coat the curved panel more evenly. Moreover, during the upward movement of the special-shaped clamping plate 655, it is squeezed by the curved surface of the coating roller 62, causing the special-shaped clamping plate 655 to drive the second sliding rod 653 to slide along the inner wall of the arc-shaped frame plate 652. At this time, the special-shaped clamping plate 655 and the arc-shaped frame plate 652 move closer to each other, enabling the rotating bar 658 to drive the moving block 657 to slide along the inner wall of the limiting groove 656. The two moving blocks 657 move away from each other, and the moving block 657 drives the clamping block 659 to move. When the arc-shaped plates 634 form a circle, the clamping block 659 can move to the outer wall of the arc-shaped plate 634 to slightly position-limit the arc-shaped plate 634, preventing the two special-shaped clamping plates 655 from excessively squeezing the outer wall of the coating roller 62 and affecting the coating application of the coating roller 62.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A curved surface roller coating robot, comprising a workbench, one side of the top of the workbench is fixedly connected with a robotic arm, one end side wall of the robotic arm far away from the workbench is fixedly connected with a material storage shell, and fixing plates are respectively fixedly connected to both sides of the material storage shell, and it is characterized in that: Further comprising; A spraying mechanism, which is arranged on the top of the material storage shell; A coating mechanism, which includes a rotating shaft rotatably connected between two fixed plates. A coating roller is fixedly connected to the outer wall of the middle end of the rotating shaft. Limiting components are arranged at both ends of the rotating shaft for limiting the coating pressure of the coating roller.

2. The surface rolling and coating robot according to claim 1, characterized in that: The spraying mechanism includes a coating pump fixedly connected to the top of the material storage shell. The output end of the coating pump communicates with the inside of the material storage shell. Elbow pipes are respectively communicated on both sides of the material storage shell. One end of the elbow pipe away from the material storage shell communicates with a conversion shell. There is one conversion shell. The top of the conversion shell is fixedly connected to the bottom of the material storage shell. A discharging device is communicated with the bottom of the conversion shell.

3. The surface rolling coating robot according to claim 2, wherein: The limiting component includes annular frames fixedly connected to both ends of the rotating shaft. First sliding rods respectively penetrate and are slidably connected to the outer periphery of the outer wall of the annular frame. One end of the first sliding rod is fixedly connected with a compression spring. The end of the compression spring away from the first sliding rod is fixedly connected to one side of the inner wall of the annular frame. The end of the first sliding rod away from the compression spring is fixedly connected with an arc-shaped plate.

4. The surface rolling coating robot according to claim 3, wherein: One side wall of one end of the first sliding rod is rotatably connected with a first rotating plate. There are eight first rotating plates. The end of the first rotating plate away from the first sliding rod is rotatably connected with a diamond ring. There are two diamond rings. The inner wall of the diamond ring is slidably connected to the outer wall of one end of the rotating shaft. An annular groove is opened on one side of the outer wall of the diamond ring.

5. The surface rolling coating robot according to claim 4, wherein: A lifting component is arranged on the inner wall of the annular groove. The lifting component includes a sliding frame slidably connected to the top end of the inner wall of the annular groove. One end of the sliding frame is rotatably connected with a second rotating plate. The end of the second rotating plate away from the sliding frame is rotatably connected with a slider.

6. The surface rolling and coating robot according to claim 5, characterized in that: A square groove is opened on one side of the fixed plate close to the material storage shell. One end outer wall of the slider is slidably connected to the inner wall of the square groove. A rack frame is fixedly connected to the bottom of the slider. A gear ring is meshed with the side wall of the rack frame. The inner wall of the gear ring is fixedly connected to the outer wall of one end of the rotating shaft.

7. The surface rolling coating robot according to claim 6, characterized in that: An auxiliary component is arranged at the bottom of the rack frame. The auxiliary component includes a fixed strip fixedly connected to the bottom of the rack frame. Two arc-shaped frame plates are respectively fixedly connected to both ends of the fixed strip. A second sliding rod penetrates and is slidably connected to one side of the arc-shaped frame plate.

8. The surface rolling coating robot according to claim 7, wherein: One side wall of one end of the second sliding rod is fixedly connected with a reset spring. One end of the reset spring is fixedly connected to the side wall of the arc-shaped frame plate. The end of the second sliding rod away from the reset spring is fixedly connected with a special-shaped clamping plate. One side of the special-shaped clamping plate is in contact with one side of the outer wall of the coating roller. Limiting grooves are respectively opened at both ends of one side of the special-shaped clamping plate close to the second sliding rod.

9. The surface rolling coating robot according to claim 8, wherein: A moving block is slidably connected to the inner wall of the limiting groove. One end of the moving block is rotatably connected with a rotating bar. The end of the rotating bar away from the moving block is rotatably connected to the side wall of the arc-shaped frame plate. A clamping block is fixedly connected to the side wall of the moving block.

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