Laser pipe cutting chuck

Abstract

This invention provides a laser tube cutting chuck, comprising a front cover, four grippers, two sets of drive devices (two sets in each set) for correspondingly driving the movement of the four grippers, a rear cover, a connecting seat for fixing the front and rear covers together, a frame, a rotary drive mechanism mounted on the frame for driving the rotation of the four grippers, and two sets of rack and pinion synchronization mechanisms fixedly mounted at the rear end of the front cover for rigidly constraining the motion synchronization of the two sets of drive devices in the same set of the two sets of drive devices. The synchronization mechanism includes two synchronous drive racks fixedly connected to the two sets of drive devices in the same set, two synchronous gears rotatably mounted on the front cover and correspondingly meshing with the two synchronous drive racks, and synchronous connectors at both ends meshing with the two synchronous gears. This chuck enables precise synchronization during the movement of the two sets of grippers (up / down and left / right), and the drive devices and synchronization mechanisms operate smoothly without interference, ensuring reliable operation.

Description

Technical Field

[0001] This invention relates to the field of tools and equipment for laser tube cutting machines, specifically to a laser tube cutting chuck. Background Technology

[0002] A chuck is an essential auxiliary tool for laser tube cutting machines when cutting and processing tubes. The chuck is used to clamp and fix the tube during processing, and sometimes it is necessary to rotate the tube after clamping. Existing chucks generally use cylinders as power, driving two sets of jaws mounted on the front end of the front cover through a transmission mechanism to clamp the tube being processed. One set of jaws moves vertically, and the other set moves horizontally. The synchronization accuracy of the two sets of jaws during the clamping process has a significant impact on the precision of laser cutting of the tube; the higher the synchronization accuracy of the two sets of jaws, the better. Therefore, chucks in recent years generally incorporate a synchronization mechanism for the movement of two sets of grippers to improve the synchronicity of the gripping of the pipe by the two sets of grippers. Existing chuck gripper synchronization mechanisms typically employ a linkage structure. For example, Chinese patent documents CN101439454A ("A Linkage-Type Chuck for a Laser Pipe Cutting Machine") and CN106984842B ("Lightweight Pipe Cutting Chuck") disclose chucks that utilize 2-link and 4-link synchronization mechanisms to improve the synchronicity of the grippers clamping the pipe. However, the aforementioned 2-link or 4-link synchronization mechanisms have limited effectiveness in improving the accuracy of pipe clamping synchronization, and the wear and loosening of the connecting pins during use can severely affect the synchronization accuracy. Currently, chain-type synchronization mechanisms have also appeared on the market, but they also suffer from the need to improve synchronization accuracy and are prone to jamming during use. Summary of the Invention

[0003] The purpose of this invention is to improve the synchronization accuracy of the two sets of grippers when using existing chucks, and to provide a laser tube cutting chuck that uses gears and racks to achieve synchronization of the two sets of grippers. It has high synchronization accuracy and smooth and reliable operation during use.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: a laser tube cutting chuck, comprising a front cover with a tube passage hole in the middle and four sliding grooves, two sets of four grippers movably disposed at the front end of the front cover, two sets of two drive devices each for driving the four grippers to move, a rear cover fixedly disposed at the rear side of the front cover, a connecting seat for fixing the front cover and the rear cover, a frame for mounting and connecting, and a rotary drive mechanism disposed on the frame for driving the four grippers to rotate. Its structural feature is that it further includes two sets of gear and rack type synchronization mechanisms fixedly disposed at the rear end of the front cover for rigidly constraining the motion synchronization of the two sets of drive devices in the same group of the two drive devices; the synchronization mechanism includes two synchronous drive racks fixedly connected to the two sets of drive devices in the same group, two synchronous gears rotatably disposed on the front cover and correspondingly meshing with the two synchronous drive racks, and synchronous connecting members at both ends meshing with the two synchronous gears. The chuck is equipped with two synchronization mechanisms. One synchronization mechanism rigidly constrains the motion synchronization of the two drive devices that drive the vertical jaws, and the other synchronization mechanism rigidly constrains the motion synchronization of the two drive devices that drive the horizontal jaws. This enables the vertical jaws and the horizontal jaws to achieve precise synchronization during the clamping and releasing of the workpiece.

[0005] A further solution is as follows: the synchronization connector of the aforementioned synchronization mechanism includes a connecting plate, and a first rack and a second rack fixedly connected to both ends of the connecting plate; the aforementioned synchronization gears are irregularly shaped gears integrally composed of a gear shaft, driving teeth and driven teeth respectively located on the outer sides of the front and rear ends of the gear shaft; the two synchronization gears respectively mesh with the two synchronized drive racks via their driving teeth, and the two synchronization gears respectively mesh with the first rack and the second rack of the aforementioned synchronization connector via their driven teeth. The synchronization connector can effectively achieve consistent movement between the two synchronization gears, thereby achieving rigid constraint on the synchronized movement of the two sets of drive devices.

[0006] A further embodiment is as follows: the connecting seat is a hollow structure with openings at both the front and rear ends, and the hollow part of the connecting seat communicates with the tubular component of the front cover through a hole; as a preferred embodiment, the synchronous connecting component of the synchronous mechanism further includes a synchronous slide rail fixedly mounted on the connecting seat, and a synchronous slider fixedly mounted on the connecting plate and slidingly engaging with the synchronous slide rail. The synchronous slide rail and synchronous slider play a guiding and supporting role, ensuring more accurate meshing of the first and second racks with the two synchronous gears, further improving synchronization accuracy.

[0007] A further solution is that the through hole of the aforementioned front cover is a square hole; and the end faces of the front and rear openings of the aforementioned connecting seat are square.

[0008] A further embodiment is as follows: The aforementioned drive device includes a cylinder fixedly mounted on the front cover; one drive plate slide rail fixedly mounted on each side of the cylinder on the front cover; a drive plate slider slidably mounted on the drive plate slide rail; a drive plate whose rear end face is fixedly connected to the drive plate slider and whose front end face has an obliquely angled drive countersunk hole; a piston rod connector whose front and rear ends are fixedly connected to the piston rods of the drive plate and the cylinder, respectively; a transmission bearing rotatably mounted in the drive countersunk hole of the drive plate; a transmission slider movably mounted in the slide groove of the front cover and fixed to a gripper; and a transmission shaft whose rear end is sleeved with the transmission bearing and whose front end is fixedly connected to the transmission slider. The piston rods of the cylinders in the two sets of drive devices in the same group are installed in opposite directions. The two synchronous drive racks of the aforementioned synchronization mechanism are each fixedly mounted on the drive plate of the two sets of drive devices in the same group. This structural design of the drive device enables it to operate smoothly without interference, with fast drive response and high efficiency.

[0009] A further solution is that the aforementioned laser tube cutting chuck also includes a dustproof assembly, which comprises four accordion-style dust covers and one dust cover housing. One of the four accordion-style dust covers is located at each of the four sliding grooves on the front cover. The dust cover housing is a cylindrical structure fixedly positioned on the outer periphery between the front and rear covers. By incorporating this dustproof assembly, dust and debris can be prevented from entering the chuck's interior, thus ensuring the laser tube cutting chuck's high reliability and long service life.

[0010] A further embodiment is as follows: The aforementioned rotary drive mechanism includes a gearbox fixedly mounted on the frame, a driving gear and a driven gear housed within the gearbox, and a bearing fixedly mounted within the frame; the driven gear meshes with the driving gear, and the driven gear is sleeved with the inner ring of the bearing and fixedly connected to the rear cover. This rotary drive mechanism enables the gripper to rotate when needed. This type of rotary drive mechanism has a simple structure and compact installation.

[0011] The present invention has the following positive effects: (1) The laser tube cutting chuck of the present invention, through the structural design of the synchronization mechanism and the cooperation design between the synchronization mechanism and the drive device, uses one set of synchronization mechanism to rigidly constrain the motion synchronization of the two sets of drive devices in the same group, so that the two sets of jaws driven by the two sets of drive devices can achieve precise synchronization in the process of clamping the tube in opposite directions and releasing the tube in opposite directions. Compared with the synchronization mechanism of the prior art chuck, it can greatly improve the synchronization accuracy and is conducive to improving the accuracy of laser cutting of tubes. (2) The laser tube cutting chuck of the present invention, compared with the prior art, through the structural design of the synchronization mechanism and the drive device, makes it run smoothly without interference during the working process, with fast drive response, high efficiency and good working reliability. (3) The laser tube cutting chuck of the present invention, through the setting of dustproof components, can prevent dust from entering the inside of the chuck, thereby making the laser tube cutting chuck have good working reliability and long service life. (4) The laser tube cutting chuck of the present invention, through the structural design of the rotary drive mechanism, can realize the rotation of the jaws when needed. The rotary drive mechanism has a simple structure and compact installation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention when viewed from the front;

[0013] Figure 2 This is a three-dimensional structural diagram of the present invention as viewed from the rear;

[0014] Figure 3 for Figure 2 A schematic diagram of a half-section structure;

[0015] Figure 4 To remove Figure 1 A three-dimensional structural diagram showing the rear cover, frame, rotary drive mechanism, and dustproof components.

[0016] Figure 5 From Figure 4 A schematic diagram of the planar structure when viewed from the right rear.

[0017] Figure 6 for Figure 5 A schematic diagram of the three-dimensional structure;

[0018] Figure 7 To remove Figure 5 A schematic diagram of the structure after the four cylinders in the middle;

[0019] Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure;

[0020] Figure 9 for Figure 4A three-dimensional structural diagram of the transmission slider, transmission shaft, and transmission bearing of the drive unit;

[0021] Figure 10 for Figure 5 A schematic diagram of the planar structure of the drive plate of the drive unit when viewed from the rear end;

[0022] Figure 11 for Figure 5 A schematic diagram of the planar structure of the drive plate of the drive unit when viewed from the front end.

[0023] Figure 12 This is a schematic diagram of the three-dimensional structure of the driver board;

[0024] Figure 13 for Figure 5 A three-dimensional structural diagram of the synchronizing gear in the intermediate synchronizing mechanism;

[0025] Figure 14 for Figure 5 A three-dimensional structural diagram of the synchronization connector of the synchronization mechanism.

[0026] The reference numerals in the above figures are as follows:

[0027] Front cover 1, pipe fitting through hole 11, slide groove 12; clamp 2; connecting seat 3;

[0028] Drive unit 4, cylinder 41, cylinder mounting post 41-1, drive plate slide rail 42, drive plate slider 43, drive plate 44, first slider connecting part 44-1, second slider connecting part 44-2, cylinder power connecting part 44-3, synchronous drive rack connecting part 44-4, drive countersunk hole 44-5; piston rod connecting part 45, transmission slider 46, transmission shaft 47, transmission bearing 48;

[0029] Synchronization mechanism 5, synchronous drive rack 51, synchronous gear 52, gear shaft 52-1, driving gear 52-2, driven gear 52-3, synchronous connector 53, connecting plate 53-1, first rack 53-2, second rack 53-3, synchronous slide rail 53-4, synchronous slider 53-5;

[0030] 6. Rear cover; 7. Frame;

[0031] Rotary drive mechanism 8, gearbox 81, drive gear 82, driven gear 83, bearing 84;

[0032] Dustproof component 9, accordion-style dust cover 91, dust cover shell 92. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] (Example 1)

[0035] In this embodiment, when describing the orientation, using Figure 1 The direction being faced is the front as described, with the back to the front. Figure 1 The direction is as described in the description, behind. Figure 1 The up-down and left-right directions are still the same as those described.

[0036] See Figures 1 to 5 The laser tube cutting chuck of this embodiment mainly consists of a front cover 1, a gripper 2, a connecting seat 3, a driving device 4, a synchronization mechanism 5, a rear cover 6, a frame 7, a rotary driving mechanism 8, and a dustproof component 9.

[0037] The front cover 1 is a circular disc-shaped structural component. A pipe passage hole 11 is provided in the center of the front cover 1 for clamping pipes during use. The pipe passage hole 11 of the front cover 1 can be square or round; in this embodiment, the pipe passage hole 11 of the front cover 1 is square. The front cover 1 has four sliding grooves 12, two of which are arranged vertically, and the other two are arranged horizontally. Figure 4 As shown. The structure of the front cover 1 is existing technology and will not be described in detail.

[0038] The gripper 2 is arranged in two groups, one vertically and the other horizontally. Each group has two grippers 2, and the two grippers 2 in the same group are arranged opposite each other. The structure and arrangement of the gripper 2 are existing technologies and will not be described in detail.

[0039] The connecting seat 3 is used for installation and connection. The connecting seat 3 is a square tubular structure with openings at both the front and rear ends, which is adapted to the square hole 11 of the pipe fitting of the front cover 1. The hollow part of the connecting seat 3 is also square. The connecting seat 3 is fixedly installed on the rear end face of the front cover 1, and the hollow part of the connecting seat 3 communicates with the pipe fitting through hole 11 in the middle of the front cover 1.

[0040] See Figures 4 to 8 The drive unit 4 is arranged in four identical sets on the rear end face of the front cover 1, one in the top, one in the bottom, one in the left and one in the right. Each set of drive unit 4 drives one gripper 2 to move. Corresponding to the fact that the gripper 2 is divided into two groups according to the top and bottom direction and the left and right direction, the four sets of drive units 4 are also divided into two sets of drive units 4 in the top and bottom direction as one group and two sets of drive units 4 in the left and right direction as the other group.

[0041] The drive unit 4 mainly consists of a cylinder 41, a drive plate slide rail 42, a drive plate slider 43, a drive plate 44, a piston rod connector 45, a transmission slider 46, a transmission shaft 47, and a transmission bearing 48.

[0042] Cylinder 41 serves as the power source and is fixed to the front cover 1 via a cylinder mounting post 41-1. Cylinder 41 has a piston rod that outputs power. The piston rods of the cylinders 41 in the two sets of drive devices 4 in the same group are installed in opposite directions. One drive plate slide rail 42 is fixedly installed on the front cover 1 at the front end of cylinder 41, one at the top and one at the bottom. Drive plate sliders 43 that can slide on the two drive plate slide rails 42 are mounted on them. The drive plate 44 is an irregularly shaped plate. The rear end face of the drive plate 44 is provided with a first slider connection part 44-1, a second slider connection part 44-2, a cylinder power connection part 44-3, and a synchronous drive rack connection part 44-4, depending on the connecting components. The front end face of the drive plate 44 is provided with a drive countersunk hole 44-5 at an angle. The structure of the drive plate 44 is as follows. Figures 10 to 12 As shown. The drive plate 44 is fixedly connected to the front end of the drive plate slider 43 on the two drive plate slide rails 42 by its first slider connecting part 44-1 and the second slider connecting part 44-2 respectively; the drive plate 44 is fixedly connected to the front end of the piston rod connecting part 45 by its cylinder power connecting part 44-3, and the rear end of the piston rod connecting part 45 is fixedly connected to the piston rod of the cylinder 41. Thus, under the driving action of the cylinder 41 and the transmission action of the piston rod connecting part 45, the drive plate 44 can move smoothly and steadily by relying on the two drive plate slide rails 42 and the drive plate slider 43 on them.

[0043] See Figure 9 The transmission slider 46 is a structural component that cooperates with the groove 12 of the front cover 1. The front end of the transmission shaft 47 is fixedly connected to the transmission slider 46, and the rear end of the transmission shaft 47 is sleeved with the transmission bearing 48. The transmission bearing 48 is movably disposed in the drive countersunk hole 44-5 of the drive plate 44.

[0044] Still see Figure 4 Each of the four drive units 4 is connected to a sliding groove 12 of the front cover 1 by its transmission slider 46. Each of the four grippers 2 is fixedly installed on each transmission slider 46.

[0045] During operation, the driving force of cylinder 41 causes drive plate 44 to move. Drive bearing 48 rolls in drive countersunk hole 44-5 of drive plate 44 through drive shaft 47, causing drive slider 46 to move linearly in slide groove 12 of front cover 1, thereby causing gripper 2 fixedly mounted on drive slider 46 to move linearly up and down or left and right.

[0046] The above-described structural design of the drive device 4 in this embodiment enables it to operate smoothly without interference, with fast drive response and high efficiency.

[0047] See Figures 5 to 8The synchronization mechanism 5 has two identical sets at the rear end of the front cover 1. One set of synchronization mechanism 5 is used to realize the synchronous driving of the two sets of driving devices 4 in the up and down direction, thereby realizing the synchronous movement between the two grippers in the up and down direction; the other set of synchronization mechanism 5 is used to realize the synchronous driving of the two sets of driving devices 4 in the left and right direction, thereby realizing the synchronous movement between the two grippers 2 in the left and right direction.

[0048] The synchronization mechanism 5 mainly consists of two synchronous drive racks 51, two synchronous gears 52, and a synchronous connector 53. One synchronous drive rack 51 is fixedly installed at the synchronous drive rack connection portion 44-4 of each drive plate 44 in the same set of two drive devices 4. The two synchronous drive racks 51 extend in the same direction from their respective drive plates 44, and their teeth are positioned opposite each other. The synchronous gears 52 are irregularly shaped gears, and their structure is as follows... Figure 13 As shown, the synchronous gear 52 is integrally composed of a gear shaft 52-1, a driving tooth 52-2 located on the outer side of the front end of the gear shaft 52-1, and a driven tooth 52-3 located on the outer side of the rear end of the gear shaft 52-1. The two synchronous gears 52 are rotatably mounted on the front cover 1, respectively engaging with the positions of the two synchronous drive racks 51. Each of the two synchronous drive racks 51 meshes with the driving tooth 52-2 of one synchronous gear 52, thereby driving the synchronous drive racks 51 to move and causing the synchronous gears 52 to rotate when the drive plate 44 of the drive device 4 moves.

[0049] Synchronous connector 53 is used to achieve dynamic engagement of the two synchronous gears 52. The structure of synchronous connector 53 is described in [reference needed]. Figure 14 It mainly consists of a connecting plate 53-1, a first rack 53-2 and a second rack 53-3 fixedly connected to both ends of the connecting plate 53-1, a synchronous slide rail 53-4 located on the inner side of the connecting plate 53-1, and a synchronous slider 53-5 fixedly mounted on the connecting plate 53-1 and slidingly engaged with the synchronous slide rail 53-4. The synchronous slide rail 53-4 of the synchronous connector 53 is fixedly mounted on the outer end face of the connecting seat 3. The first rack 53-2 and the second rack 53-3 of the synchronous connector 53 each mesh with the driven teeth 52-3 of one synchronous gear 52. The synchronous slide rail 53-4 and the synchronous slider 53-5 are preferably configured to guide and support, ensuring more accurate meshing of the first rack 53-2 and the second rack 53-3 with the two synchronous gears 52.

[0050] During operation, the two synchronous gears 52 rotate synchronously due to the constraint of the synchronous connector 53. Then, the two synchronous drive racks 51 constrain the movement of the drive plates 44 of the two sets of drive devices 4 that are fixedly connected to the two synchronous drive racks 51, thereby making the two grippers 2 driven by the two sets of drive devices 4 move synchronously.

[0051] As can be seen from the foregoing, the above-mentioned structural design of the synchronization mechanism 5 in this embodiment can effectively ensure the precise synchronization of the movement of the two sets of drive devices 4 in the same group during operation, thereby enabling the two grippers 2 driven by the two sets of drive devices 4 to move in precise synchronization. Compared with the synchronization mechanism of the chuck in the prior art, its synchronization accuracy is higher. Furthermore, the use of gear and rack cooperation, along with the assistance of the synchronization slide rail 53-4 and the synchronization slider 53-5, makes the synchronization mechanism 5 run smoothly without interference during operation, resulting in high reliability.

[0052] Still see Figures 1 to 3 The rear cover 6 is a circular plate with a square hole in the middle. The rear cover 6 is fixedly connected to the connecting seat 3 and is located on the rear end face of the connecting seat 3.

[0053] The frame 7 serves as the mounting and connection base, and its structure is the same as that of existing technology, so it will not be described in detail.

[0054] The rotary drive mechanism 8 is used to drive the aforementioned front cover 1, gripper 2, connecting seat 3, drive device 4, synchronization mechanism 5, and rear cover 6 to rotate as a whole. The rotary drive mechanism 8 includes a gearbox 81 fixedly mounted on the frame 7, a driving gear 82 and a driven gear 83 disposed within the gearbox 81, and a bearing 84 fixedly mounted within the frame 7; the driven gear 83 meshes with the driving gear 82, and the driven gear 83 is sleeved with the inner ring of the bearing 84 and fixedly connected to the rear cover 6. In use, the driving gear 82 is connected to the power source motor (not shown in the figure) for transmission.

[0055] The dustproof component 9 is preferably configured. The dustproof component 9 includes four accordion-style dust covers 91 and one dust cover shell 92. One of the four accordion-style dust covers 91 is located at each of the four sliding grooves 12 on the front cover 1. The dust cover shell 92 is a cylindrical structure, fixedly disposed on the outer periphery between the front cover 1 and the rear cover 6, to shield the connecting seat 3, driving device 4, and synchronization mechanism 5 mounted on the front cover 1. By providing the dustproof component 9, dust and debris can be prevented from entering the chuck, thereby ensuring the chuck of this embodiment has good operational reliability and a long service life.

[0056] The working principle and process of the laser tube cutting chuck in this embodiment are briefly described as follows:

[0057] Taking the two grippers 2 moving up and down as an example, during operation, the cylinders 41 of the two sets of up and down drive devices 4 in the same group simultaneously receive air. The piston rods of the two cylinders 41 extend in opposite directions, and through the corresponding piston rod connectors 45, the corresponding drive plates 44 move based on the corresponding drive plate sliders 43 and drive plate slide rails 42. The two drive plates 44 move in opposite directions, and the reverse movement of the two drive plates 44 is transmitted through the transmission bearings 48 and the transmission shafts 47, so that the corresponding two transmission sliders 46 slide in a centripetal linear motion within the two up and down slide grooves 12 of the front cover 1, thereby driving the two grippers 2 to move in opposite directions to clamp the pipe inserted into the front cover 1. The pipe fitting being processed is located within the through hole 11. Simultaneously, while the two sets of drive devices 4 drive the two grippers 2 to perform opposing clamping actions, two opposing drive plates 44 push and pull, causing the two synchronous drive racks 51 fixed on the two drive plates 44 to move in opposite directions. The movement of the two synchronous drive racks 51 causes the two synchronous gears 52 to rotate in the same direction. Synchronous connectors 53, which mesh with the two synchronous gears 52 at both ends, rigidly constrain the synchronicity of the synchronicity of the rotation of the two synchronous gears 52 in the same direction. Thus, the synchronicity of the movement of the two opposing drive plates 44 is rigidly constrained by the synchronicity mechanism 5, thereby ensuring precise synchronization of the two grippers 2 during their opposing clamping movements. When the cylinders 41 of the two vertical drive units 4 simultaneously release air, the movements of the two drive units 4, the synchronization mechanism 5, and the two grippers 2 are opposite to those during air intake. The two grippers 2 move in opposite directions to release the workpiece. During this movement, the synchronization mechanism 5 similarly ensures the synchronicity of the two grippers 2 during their vertical opposing movements. Similarly, the working principle and process of the two grippers 2 moving in the left and right directions are basically the same and will not be elaborated further.

[0058] When the gripper 2 needs to rotate during use, the motor in the rotary drive mechanism 8 that is connected to the drive gear 82 is turned on. The drive gear 82 drives the driven gear 83 to rotate, relying on the bearing 84 and the frame 7. The rotation of the driven gear 83 drives the rear cover that is fixedly connected to it to rotate. The rotation of the rear cover drives the connecting seat 3 that is fixedly connected to the rear cover to rotate. The rotation of the connecting seat 3 drives the front cover 1, gripper 2, drive device 4, and synchronization mechanism 5 to rotate together as a whole, thereby realizing the rotation function of the gripper 2.

[0059] The above embodiments are descriptions of specific implementations of the present invention, and not limitations thereof. Those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A laser tube cutting chuck, comprising a front cover with a tube passage hole in the middle and four sliding grooves, two sets of four grippers movably disposed at the front end of the front cover, two sets of two drive devices each for driving the four grippers to move, a rear cover fixedly disposed at the rear side of the front cover, a connecting seat for fixing the front cover and the rear cover together, a frame for mounting and connecting, and a rotary drive mechanism disposed on the frame for driving the four grippers to rotate, characterized in that: It also includes two sets of gear and rack type synchronization mechanisms fixedly mounted on the rear end of the front cover, which are used to rigidly constrain the motion synchronization of the two sets of drive devices in the same group of the two sets of drive devices; the synchronization mechanism includes two synchronous drive racks fixedly connected to the two sets of drive devices in the same group, two synchronous gears rotatably mounted on the front cover and respectively meshing with the two synchronous drive racks, and synchronous connectors at both ends meshing with the two synchronous gears respectively; The synchronizing mechanism includes a synchronizing connector comprising a connecting plate, a first rack and a second rack fixedly connected to both ends of the connecting plate; the synchronizing gear is an irregularly shaped gear integrally composed of a gear shaft, a driving gear portion and a driven gear portion respectively located on the outer side of the front end and the rear end of the gear shaft, the two synchronizing gears respectively meshing with the two synchronizing drive racks by their driving gear portions, and the two synchronizing gears respectively meshing with the first rack and the second rack of the synchronizing connector by their driven gear portions; The connecting seat is a hollow structural component with openings at both the front and rear ends. The hollow part of the connecting seat communicates with the tube of the front cover through a hole. The synchronous connecting component of the synchronous mechanism also includes a synchronous slide rail fixedly mounted on the connecting seat and a synchronous slider fixedly mounted on the connecting plate and slidingly engaged with the synchronous slide rail. The driving device includes a cylinder fixedly mounted on the front cover; one drive plate slide rail fixedly mounted on each side of the cylinder on the front cover; a drive plate slider slidably mounted on the drive plate slide rail; a drive plate whose rear end face is fixedly connected to the drive plate slider and whose front end face has an obliquely angled drive countersunk hole; a piston rod connector whose front and rear ends are respectively fixedly connected to the piston rod of the drive plate and the cylinder; a transmission bearing rotatably mounted in the drive countersunk hole of the drive plate; a transmission slider movably mounted in the slide groove of the front cover and fixed to a gripper; and a transmission shaft whose rear end is sleeved with the transmission bearing and whose front end is fixedly connected to the transmission slider; the piston rods of the cylinders of the two sets of driving devices in the same group are installed in opposite directions; and the two synchronous drive racks of the synchronization mechanism are each fixedly mounted on the drive plate of the two sets of driving devices in the same group. The rotary drive mechanism includes a gearbox fixedly mounted on the frame, a driving gear and a driven gear mounted in the gearbox, and a bearing fixedly mounted in the frame; the driven gear meshes with the driving gear, the driven gear is sleeved with the inner ring of the bearing and fixedly connected to the rear cover.

2. The laser tube cutting chuck according to claim 1, characterized in that: The tubes of the front cover have square holes; the end faces of the front and rear openings of the connecting seat are square.

3. The laser tube cutting chuck according to claim 1, characterized in that: It also includes a dustproof component, which includes four accordion-style dust covers and one dust cover shell; one of the four accordion-style dust covers is provided at each of the four sliding grooves of the front cover; the dust cover shell is a cylindrical structural component, and the dust cover shell is fixedly located on the outer periphery between the front cover and the rear cover.

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