An auxiliary hoisting device for steel material handling

Abstract

The present invention relates to the field of steel hoisting, and specifically discloses an auxiliary hoisting device for steel handling. The auxiliary hoisting device for steel handling includes a moving frame, a main guide rail horizontally arranged above the moving frame, a moving trolley installed on the moving frame, and the moving trolley is installed on the main guide rail, and the moving trolley can drive the moving frame to move along the main guide rail; for this auxiliary hoisting device for steel handling, the jaw assembly moves downward, the two clamping arms open, and at the same time, two groups of steel materials are clamped. The moving frame drives the clamped steel materials to rise and reset, and the moving trolley drives the steel materials to move along the main guide rail, and cooperates with the grooving device to groove the middle of the steel materials, and the grooved steel materials are bent and welded together. The two groups of bent steel materials are rotated upward, and the two groups of bent steel materials can approach and contact each other, and the two groups of bent steel materials are welded. This device can complete the actions of bending and splicing two groups of steel materials.

Description

Technical Field

[0001] The present invention belongs to the field of steel hoisting, and particularly relates to an auxiliary hoisting device for steel handling. Background Art

[0002] When processing steel, it needs to be handled, and generally the hoisting method is adopted. When bending and splicing steel, usually a bending device is first used to bend the steel, and then the bent steel is spliced and welded together, resulting in low efficiency of bending and splicing steel. During the processing, the steel needs to be placed at the corresponding position, and after the processing is completed, the steel is lifted again to handle the steel so that the processed steel can be transported to the processing device of the next process. During the process of placing and lifting the steel, it is necessary to re-determine the position of the steel, which affects the processing efficiency of the steel. Summary of the Invention

[0003] The purpose of the present invention is to provide an auxiliary hoisting device for steel handling with a simple structure and reasonable design to solve the above problems.

[0004] The present invention realizes the above purpose through the following technical solutions: It is not necessary to bend and splice the steel through other devices, and it is not necessary to repeatedly place and lift the steel during the processing of the steel, improving the processing and handling efficiency of the steel.

[0005] An auxiliary hoisting device for steel handling includes a moving frame, a main guide rail horizontally arranged above the moving frame, a moving trolley installed on the moving frame, and the moving trolley is installed on the main guide rail, and the moving trolley can drive the moving frame to move along the main guide rail;

[0006] Two jaw mechanisms are arranged below the moving frame, and the two jaw mechanisms are spaced along the length direction of the guide rail. The jaw mechanism includes two support arms, one end of the two support arms is close to each other, and the other end is far from each other. One end of the two support arms close to each other is rotatably installed on a support plate through a hinge shaft A, and the hinge shaft A is horizontally arranged. A jaw assembly is installed at the end of the two support arms far from each other, and the jaw assembly is used for clamping the steel. One end of the two support arms close to each other is connected to an A adjustment mechanism, and the A adjustment mechanism is used to adjust the synchronous rotation of the two support arms around the hinge shaft A;

[0007] The support plate is fixedly connected to a rotating shaft, the rotating shaft is horizontally arranged, the axial direction of the rotating shaft is perpendicular to the axial direction of the hinge shaft A, the rotating shaft is rotatably installed on a support member, and the rotating shaft is connected to a B adjustment mechanism, and the B adjustment mechanism is used to adjust the rotation of the rotating shaft;

[0008] A chute is provided on the moving frame, the chute is horizontally distributed, and the groove direction of the chute is perpendicular to the axial direction of the rotating shaft. The support member is slidably installed in the chute, and the support member is connected to a C adjustment mechanism, and the C adjustment mechanism is used to adjust the mutual approach or separation of the two support members.

[0009] As a further optimization solution of the present invention, the A adjustment mechanism includes an A guide rail, an A lifting rod, and an A transmission component. The A guide rail is distributed along the length direction of the main guide rail. The A lifting rod is arranged vertically. The A lifting rod is slidably installed on the support plate. An A spring is sleeved on the A lifting rod. The A spring is used to maintain the relative position between the A lifting rod and the support plate. The upper end of the A lifting rod abuts against the A guide rail. The A guide rail is used to adjust the lifting of the A lifting rod. The A lifting rod is connected to the A hinge shaft through the A transmission component to realize the rotation adjustment of the A hinge shaft.

[0010] As a further optimization solution of the present invention, the A transmission component includes two mutually meshing A driven gears. The two A driven gears are respectively fixedly installed on the two A hinge shafts. An A driving gear is installed on one of the A driven gears. The A driven gear is parallel to the A driving gear, and the centers of the A driven gear and the A driving gear are at the same position. The A driving gear meshes with the A rack. The A rack is arranged vertically. The A rack is fixedly connected to the A lifting rod.

[0011] As a further optimization solution of the present invention, the B adjustment mechanism includes a B guide rail, a B rack, and a B gear. The B guide rail is distributed along the length direction of the main guide rail. The B rack is arranged vertically. The upper end of the B rack abuts against the B guide rail. The B guide rail is used to adjust the lifting of the B rack. The B gear is fixedly installed on the rotating shaft. The B gear meshes with the B rack.

[0012] As a further optimization solution of the present invention, the C adjustment mechanism includes a C guide rail, a C rack, and a C transmission component. The C guide rail is distributed along the length direction of the main guide rail. The C rack is arranged vertically. The upper end of the C rack abuts against the C guide rail. The C guide rail is used to adjust the lifting of the C rack. The C gear is connected to the support member through the C transmission component to realize the adjustment of the two support members approaching or separating from each other.

[0013] As a further optimization solution of the present invention, the C transmission component includes a C driven gear, a C linkage rack, and a C linkage component. The number of the C linkage racks is two groups. The two groups of C linkage racks are respectively fixedly connected to the two groups of support members. The extension lines of the two groups of C linkage racks are parallel to each other. The C driven gear is meshed between the two groups of C linkage racks. The C driven gear is rotatably connected to the frame. The C rack is connected to the C driven gear through the C linkage component to realize the rotation drive of the C linkage gear.

[0014] As a further optimization solution of the present invention, the C linkage component includes a C driven bevel gear, a C driving bevel gear, a C hinge shaft, and a C driving gear. The C driven bevel gear is installed on the C driven gear. The C driven bevel gear meshes with the C driving bevel gear. The C driving bevel gear is connected to the C driving gear through a transmission shaft. The transmission shaft is rotatably connected to the moving frame through a fixing member. The transmission shaft is horizontally arranged. The C driving gear meshes with the C rack.

[0015] As a further optimized solution of the present invention, the jaw assembly includes two groups of jaw arms, which are distributed at an angle. The closer ends of the two groups of jaw arms are hinged to the support arm through a rotating member, and the rotating member is horizontally arranged. A driving assembly is provided at the closer ends of the two groups of jaw arms, and the driving assembly drives the two groups of jaw arms to approach or move away from each other.

[0016] As a further optimized solution of the present invention, the driving assembly includes a driving member, a push plate and a connecting rod. The driving member drives the push plate to move up and down, and the push plate is connected to the jaw arm through the connecting rod to realize the rotation of the adjusting jaw arm.

[0017] As a further optimized solution of the present invention, the driving member includes an air pump, which is fixedly installed on the support arm, and the output end of the air pump is connected to the push plate to realize the lifting of the push plate.

[0018] The beneficial effects of the present invention are as follows: when the jaw assembly of the present invention moves downward, the two jaw arms open, and at the same time, two groups of steel materials are clamped. The moving frame drives the clamped steel materials to rise and reset, and the moving trolley drives the steel materials to move along the main guide rail. Cooperating with the grooving device to groove the middle of the steel materials, the grooved steel materials are bent and welded together. Rotate the two groups of bent steel materials upward, and the two groups of bent steel materials can approach and contact each other to weld the two groups of bent steel materials. This device can complete the actions of bending and splicing two groups of steel materials, which is beneficial to improving the efficiency of transporting steel materials during the steel processing process and reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic diagram of a partial structure of the present invention;

[0021] Figure 3 is a schematic diagram of another motion state of a partial structure of the present invention;

[0022] Figure 4 is a sectional view of a partial structure of the present invention;

[0023] Figure 5 is a top view of a partial structure of the present invention;

[0024] Figure 6 is a schematic structural diagram of the jaw assembly of the present invention;

[0025] Figure 7 is a top view of the guide rail structure of the present invention.

[0026] In the figure: 1. Moving frame; 11. Main guide rail; 12. Moving trolley; 21. Support arm; 22. Support plate; 23. A hinge shaft; 24. Rotating shaft; 25. Support member; 26. Slide groove; 31. A guide rail; 32. A lifting rod; 33. A spring; 34. A driven gear; 35. A driving gear; 36. A rack; 41. B guide rail; 42. B rack; 43. B gear; 51. C guide rail; 52. C rack; 53. C driven gear; 54. C linkage gear; 55. C driven bevel gear; 56. C driving bevel gear; 57. C hinge shaft; 58. C driving gear; 59. C linkage rack; 61. Clamping arm; 62. Rotating member; 63. Pushing plate; 64. Connecting rod; 65. Air pump. Detailed implementation mode

[0027] The following further describes the present application in conjunction with the attached drawings. It is necessary to point out here that the following specific implementation modes are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0028] Embodiment 1

[0029] As Figures 1 to 7 shown, in this embodiment, an auxiliary hoisting device for steel handling is proposed, including a moving frame 1. A horizontally distributed main guide rail 11 is arranged above the moving frame 1. A moving trolley 12 is installed on the moving frame 1, and the moving trolley 12 is installed on the main guide rail 11. The moving trolley 12 can drive the moving frame 1 to move along the main guide rail 11;

[0030] Two clamping jaw mechanisms are arranged below the moving frame 1, and the two clamping jaw mechanisms are spaced apart along the length direction of the guide rail. The clamping jaw mechanism includes two support arms 21. One ends of the two support arms 21 are close to each other, and the other ends are far from each other. One ends of the two support arms 21 close to each other are rotatably installed on the support plate 22 through an A hinge shaft 23. The A hinge shaft 23 is horizontally arranged. A clamping jaw assembly is installed at the other ends of the two support arms 21 far from each other. The clamping jaw assembly is used for clamping steel. One ends of the two support arms 21 close to each other are connected to an A adjustment mechanism, and the A adjustment mechanism is used to adjust the synchronous rotation of the two support arms 21 around the A hinge shaft 23;

[0031] The support plate 22 is fixedly connected to a rotating shaft 24. The rotating shaft 24 is horizontally arranged, and the axial direction of the rotating shaft 24 is perpendicular to the axial direction of the A hinge shaft 23. The rotating shaft 24 is rotatably installed on the support member 25. The rotating shaft 24 is connected to a B adjustment mechanism, and the B adjustment mechanism is used to adjust the rotation of the rotating shaft 24;

[0032] The movable frame 1 is provided with a sliding groove 26 which is horizontally distributed, and the groove direction of the sliding groove 26 is perpendicular to the axial direction of the rotating shaft 24. The support member 25 is slidably installed in the sliding groove 26. The support member 25 is connected to a C adjustment mechanism which is used to adjust the two support members 25 to approach or separate from each other.

[0033] The A adjustment mechanism includes an A guide rail 31, an A lifting rod 32 and an A transmission assembly. The A guide rail 31 is distributed along the length direction of the main guide rail 11. The A lifting rod 32 is arranged vertically. The A lifting rod 32 is slidably installed on the support plate 22. An A spring 33 is sleeved on the A lifting rod 32, and the A spring 33 is used to maintain the relative position between the A lifting and the support plate 22. The upper end of the A lifting rod 32 abuts against the A guide rail 31, and the A guide rail 31 is used to adjust the lifting of the A lifting rod 32. The A lifting rod 32 is connected to the A hinge shaft 23 through the A transmission assembly to realize the adjustment of the rotation of the A hinge shaft 23.

[0034] The A transmission assembly includes two mutually meshing A driven gears 34. The two A driven gears 34 are respectively fixedly installed on the two A hinge shafts 23. An A driving gear 35 is installed on one of the A driven gears 34. The A driven gear 34 is parallel to the A driving gear 35, and the centers of the A driven gear 34 and the A driving gear 35 are at the same position. The A driving gear 35 meshes with an A rack 36. The A rack 36 is arranged vertically, and the A rack 36 is fixedly connected to the A lifting rod 32.

[0035] The B adjustment mechanism includes a B guide rail 41, a B rack 42 and a B gear 43. The B guide rail 41 is distributed along the length direction of the main guide rail 11. The B rack 42 is arranged vertically. The upper end of the B rack 42 abuts against the B guide rail 41, and the B guide rail 41 is used to adjust the lifting of the B rack 42. The B gear 43 is fixedly installed on the rotating shaft 24, and the B gear 43 meshes with the B rack 42.

[0036] The C adjustment mechanism includes a C guide rail 51, a C rack 52 and a C transmission assembly. The C guide rail 51 is distributed along the length direction of the main guide rail 11. The C rack 52 is arranged vertically. The upper end of the C rack 52 abuts against the C guide rail 51, and the C guide rail 51 is used to adjust the lifting of the C rack 52. The C gear is connected to the support member 25 through the C transmission assembly to realize the adjustment of the two support members 25 to approach or separate from each other.

[0037] The C transmission assembly includes a C driven gear 53, two C linkage racks 59 and a C linkage assembly. The number of the C linkage racks 59 is two groups. The two groups of C linkage racks 59 are respectively fixedly connected to the two groups of support members 25. The extension lines of the two groups of C linkage racks 59 are parallel to each other. The C driven gear 53 is meshed between the two groups of C linkage racks 59. The C driven gear 53 is rotationally connected to the frame body. The C rack 52 is connected to the C driven gear 53 through the C linkage assembly to realize the driving of the rotation of the C linkage gear 54.

[0038] The C linkage assembly includes a C driven bevel gear 55, a C driving bevel gear 56, a C hinge shaft 57 and a C driving gear 58. The C driven gear 53 is mounted on the C driven gear 53. The C driven bevel gear 55 meshes with the C driving bevel gear 56. The C driving bevel gear 56 is connected to the C driving gear 58 through a transmission shaft. The transmission shaft is rotatably connected to the moving frame 1 through a fixing member. The transmission shaft is horizontally arranged. The C driving gear 58 meshes with the C rack 52.

[0039] The jaw assembly includes two groups of jaw arms 61. The two groups of jaw arms 61 are distributed at an angle. One ends of the two groups of jaw arms 61 close to each other are hinged to the support arm 21 through a rotating member 62. The rotating member 62 is horizontally arranged. A driving assembly is arranged at one ends of the two groups of jaw arms 61 close to each other. The driving assembly drives the two groups of jaw arms 61 to approach or separate from each other.

[0040] The driving assembly includes a driving member, a push plate 63 and a connecting rod 64. The driving member drives the push plate 63 to move up and down. The push plate 63 is connected to the jaw arm 61 through the connecting rod 64 to realize the rotation of the adjusting jaw arm 61. The driving member includes an air pump 65. The air pump 65 is fixedly installed on the support arm 21. The output end of the air pump 65 is connected to the push plate 63 to realize the up and down movement of the push plate 63.

[0041] The moving frame 1 drives the two groups of jaw arms 61 to move downward so that the steel is located between the two groups of jaw arms 61. Connect the air pump 65 to an external power source. The output end of the air pump 65 drives the push plate 63 to move upward. With the cooperation of the connecting rod 64, the connecting rod 64 can pull the two groups of jaw arms 61 to approach each other, so that the two groups of jaw arms 61 can clamp the steel. Two groups of steel are hung below the support arm 21 and the two groups of steel are parallel to each other. The moving frame 1 drives the support arm 21 to move upward for reset. The moving trolley 12 drives the moving frame 1 to move along the main guide rail 11. When the steel moves to the grooving device position, the grooving device can groove the middle of the steel. The angle of the groove is 90 degrees, and finally the steel is cut into two sections.

[0042] The upper end of the A lifting rod 32 abuts against the A guide rail 31. As the moving trolley 12 continues to move, the moving trolley 12 drives the A lifting rod 32 to slide along the A guide rail 31. When the A lifting rod 32 moves to a certain position, the A lifting rod 32 disengages from the A guide rail 31. At this time, under the elastic force of the A spring 33, the A spring 33 pushes the A lifting rod 32 to move upward. It should be noted that in the initial state, the two support arms 21 are perpendicular to each other. When the A lifting rod 32 rolls inside the A guide rail 31, the A spring 33 is in a compressed state, and the two support arms 21 are on the same horizontal line. After the A lifting rod 32 disengages from the A guide rail 31, the A lifting rod 32 moves upward, thereby driving the A rack 36 to move synchronously. Since the A rack 36 meshes with the A driving gear 35, the A rack 36 can drive the A driving gear 35 to rotate. The A driving gear 35 drives the support arm 21 to rotate synchronously. Since the two A driven gears 34 mesh with each other, the two support arms 21 can rotate relative to each other, enabling the two support arms 21 to bend the steel. The A adjustment mechanism adjusts the two support arms 21 to rotate synchronously around the A hinge shaft 23. When the support arm 21 rotates, it can drive the steel cut into two sections to rotate, making the cut steel perpendicular to each other, and the cut parts of the two sections of steel fit together. The moving frame 1 drives the cut steel to continue to move. When the steel moves to the position of the welding device, the welding device can weld the cut position of the steel, making the steel bent at a 90-degree angle.

[0043] After welding is completed, the bent steel continues to move with the moving frame 1. During the movement, the bent steel contacts the cutting device, and the cutting device cuts the two ends of the bent steel pipe into an inclined shape. After cutting is completed, the upper end of the B rack 42 abuts against the B guide rail 41. The B gear 42 slides along the B guide rail 41 with the moving trolley 12. As the B rack 42 continues to move, the B rack 42 moves to the descending section of the B guide rail 41, and the position of the B rack 42 moves downward. Since the B rack 42 meshes with the B gear 43, the B rack 42 can drive the B gear 43 to rotate. The B gear 43 drives the rotating shaft 24 and the support plate 22 to rotate, thereby providing power for the rotation of the support plate 22 and facilitating the adjustment of the angle of the steel. The B adjustment mechanism drives the support plate 22 to rotate through the rotating shaft 24, and the two support plates 22 rotate relative to each other, thereby driving the bent steel pipe to rotate upward, making the cut part of the steel pipe corresponding.

[0044] The upper end of the C rack 52 abuts against the C guide rail 51. The C rack 52 slides along the C guide rail 51 as the moving trolley 12 moves. When the C rack 52 moves to the descending section of the C guide rail 51, the C rack 52 moves downward during the movement. Since the C rack 52 meshes with the C driving gear 58, the C rack 52 can drive the C driving gear 58 to rotate. With the cooperation of the fixing member, the C driving gear 58 drives the C driving bevel gear 56 to rotate synchronously through the transmission shaft. Since the C driving bevel gear 56 meshes with the C driven bevel gear 55, the C driving bevel gear 56 can drive the C driven bevel gear 55 to rotate. The C driven bevel gear 55 drives the C driven gear 53 to rotate synchronously. Since the C driven gear 53 meshes with the C linkage rack 59, the C driven gear 53 drives the two C linkage racks 59 to move. The two groups of C linkage racks 59 approach each other, thereby driving the two support plates 22 to approach each other, enabling the two bent steel materials to approach each other. The welding assembly welds the inclined parts of the steel pipes, thereby welding the two groups of bent steel pipes together.

[0045] In the present invention, the jaw assembly moves downward, the two jaw arms 61 open, and at the same time, the two groups of steel materials are clamped. The moving frame 1 drives the clamped steel materials to rise and reset. The moving trolley 12 drives the steel materials to move along the main guide rail 11, cooperating with the grooving device to groove the middle of the steel materials, bend and weld the grooved steel materials together, rotate the two groups of bent steel materials upward, and the two groups of bent steel materials can approach and contact each other, and weld the two groups of bent steel materials. This device can complete the operations of bending and splicing the two groups of steel materials, which is beneficial to improving the efficiency of transporting the steel materials during the steel processing process and reducing the workload of the staff.

[0046] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An auxiliary hoisting device for transporting steel, comprising a moving frame, characterized in that: A horizontally distributed main guide rail is arranged above the moving frame. A moving trolley is installed on the moving frame, and the moving trolley is installed on the main guide rail. The moving trolley can drive the moving frame to move along the main guide rail. Two jaw mechanisms are arranged below the moving frame, and the two jaw mechanisms are spaced apart along the length direction of the guide rail. The jaw mechanism includes two support arms. One ends of the two support arms are close to each other, and the other ends are far from each other. The close ends of the two support arms are rotatably installed on a support plate through a hinge shaft A. The hinge shaft A is horizontally arranged. Claw assemblies are installed at the far ends of the two support arms. The claw assemblies are used for clamping steel. The close ends of the two support arms are connected to an A adjustment mechanism. The A adjustment mechanism is used to adjust the synchronous rotation of the two support arms around the hinge shaft A. The support plate is fixedly connected to a rotating shaft. The rotating shaft is horizontally arranged. The axial direction of the rotating shaft is perpendicular to the axial direction of the hinge shaft A. The rotating shaft is rotatably installed on a support member. The rotating shaft is connected to a B adjustment mechanism. The B adjustment mechanism is used to adjust the rotation of the rotating shaft. A chute is opened on the moving frame. The chute is horizontally distributed. The groove direction of the chute is perpendicular to the axial direction of the rotating shaft. The support member is slidably installed in the chute. The support member is connected to a C adjustment mechanism. The C adjustment mechanism is used to adjust the mutual approach or separation of the two support members; The A adjustment mechanism includes an A guide rail, an A lifting rod and an A transmission component. The A guide rail is distributed along the length direction of the main guide rail. The A lifting rod is vertically arranged. The A lifting rod is slidably installed on the support plate. An A spring is sleeved on the A lifting rod. The A spring is used to maintain the relative position of the A lifting rod and the support plate. The upper end of the A lifting rod abuts against the A guide rail. The A guide rail is used to adjust the lifting of the A lifting rod. The A lifting rod is connected to the hinge shaft A through the A transmission component to realize the adjustment of the rotation of the hinge shaft A; The A transmission component includes two mutually meshing A driven gears. The two A driven gears are respectively fixedly installed on the two hinge shafts A. An A driving gear is installed on one of the A driven gears. The A driven gear is parallel to the A driving gear, and the centers of the A driven gear and the A driving gear are at the same position. The A driving gear meshes with an A rack. The A rack is vertically arranged, and the A rack is fixedly connected to the A lifting rod; The B adjustment mechanism includes a B guide rail, a B rack and a B gear. The B guide rail is distributed along the length direction of the main guide rail. The B rack is vertically arranged. The upper end of the B rack abuts against the B guide rail. The B guide rail is used to adjust the lifting of the B rack. The B gear is fixedly installed on the rotating shaft. The B gear meshes with the B rack; The C adjustment mechanism includes a C guide rail, a C rack and a C transmission component. The C guide rail is distributed along the length direction of the main guide rail. The C rack is vertically arranged. The upper end of the C rack abuts against the C guide rail. The C guide rail is used to adjust the lifting of the C rack. The C gear is connected to the support member through the C transmission component to realize the adjustment of the mutual approach or separation of the two support members; The C transmission assembly includes a C driven gear, a C linkage rack and a C linkage assembly. The number of the C linkage racks is two groups. The two groups of C linkage racks are respectively fixedly connected to two groups of support members. The extension lines of the two groups of C linkage racks are parallel to each other. The C driven gear is meshed between the two groups of C linkage racks. The C driven gear is rotatably connected to the frame body. The C rack is connected to the C driven gear through the C linkage assembly to realize the rotation of the C driven gear; The C linkage assembly includes a C driven bevel gear, a C driving bevel gear, a C hinge shaft and a C driving gear. The C driven bevel gear is installed on the C driven gear. The C driven bevel gear is meshed with the C driving bevel gear. The C driving bevel gear is connected to the C driving gear through a transmission shaft. The transmission shaft is rotatably connected to the moving frame through a fixing member. The transmission shaft is horizontally arranged. The C driving gear is meshed with the C rack; The jaw assembly includes two groups of jaw arms. The two groups of jaw arms are distributed at an angle. The closer ends of the two groups of jaw arms are hinged to the support arm through a rotating member. The rotating member is horizontally arranged. A driving assembly is arranged at the closer ends of the two groups of jaw arms. The driving assembly drives the two groups of jaw arms to approach or separate from each other; The driving assembly includes a driving member, a push plate and a connecting rod. The driving member drives the push plate to move up and down. The push plate is connected to the jaw arm through the connecting rod to realize the rotation of the adjusting jaw arm; The driving member includes an air pump. The air pump is fixedly installed on the support arm. The output end of the air pump is connected to the push plate to realize the lifting of the push plate.

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