A gear rack synchronous belt laser tube cutting machine chuck and laser tube cutting machine

Abstract

The present invention relates to a gear rack synchronous belt laser tube cutting machine chuck and a laser tube cutting machine. The gear rack synchronous belt laser tube cutting machine chuck comprises a casing, a rotating disk and a front cover are fixedly arranged at both ends of the casing respectively, four groups of claw assemblies are symmetrically arranged in pairs on the front cover, a sliding seat slidably matched with the front cover is arranged at the bottom end of each claw assembly, an inner rack is arranged on the sliding seat, a first synchronous belt, a second synchronous belt, four groups of power assemblies and four groups of transmission assemblies are arranged in the casing, each transmission assembly comprises a rotatably arranged transmission shaft, a first gear, a second gear and a synchronous wheel, the second gear is fixedly arranged at the top end of the transmission shaft and passes through the front cover to mesh with the inner rack, the first gear and the synchronous wheel are matched with the transmission shaft, an outer rack meshed with the first gear is arranged on one side of the power device of the power assembly, so that the power device drives the first gear, the transmission shaft, the second gear and the synchronous wheel to rotate synchronously, and the sliding seat and the claw assembly are driven by the first gear.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting equipment, in particular to a gear rack synchronous belt laser pipe cutting machine chuck and a laser pipe cutting machine. Background Art

[0002] In the field of laser cutting, in order to facilitate the cutting of pipes, it is usually necessary to position the pipe to be cut by using a chuck and then perform the cutting operation.

[0003] In the prior art, a patent document with application publication number CN106984842 A records a light pipe cutting chuck, comprising a motherboard, a through hole for allowing pipe fittings to pass through the middle of the motherboard, and a pneumatic clamp capable of clamping the pipe fittings passing through the through hole is also arranged on the motherboard, the pneumatic clamp comprising a plurality of pairs of clamping rods and a double-hinged clamping rod pneumatic drive mechanism for independently controlling the movement of each pair of clamping rods toward or away from each other, the double-hinged clamping rod pneumatic drive mechanism can ensure the synchronization of the movement of each pair of clamping rods (i.e., the synchronization of the movement of the two clamping rods in each pair of clamping rods toward or away from each other); the ends of the two adjacent connecting rods are hinged on the same slider through the same hinge pin, i.e., each connecting rod has one end fixed to the slider together and the other end independently fixed to the connecting block; the above structure adopts customized non-standard parts for assembly, which is difficult to manufacture and has high manufacturing cost; how to solve the above technical problems is urgently considered by technicians in this field. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gear rack synchronous belt laser pipe cutting machine chuck and a laser pipe cutting machine with simple structure and accurate positioning.

[0005] In order to solve the above technical problems, the present invention provides a gear rack synchronous belt laser pipe cutting machine chuck, including a casing, a rotating disk and a front cover are fixedly arranged at both ends of the casing, a clamping hole is arranged in the center of the rotating disk and the front cover, and four groups of claw assemblies are symmetrically arranged in pairs around the clamping hole on the front cover, and a sliding seat that slides with the front cover is arranged at the bottom end of each claw assembly, and an internal rack is arranged on the sliding seat. A first synchronous belt, a second synchronous belt, four groups of power assemblies, and four groups of transmission assemblies are arranged in the casing, and each transmission assembly includes a rotatably arranged transmission shaft, a first gear, a second gear and a synchronous wheel, and the second gear is fixedly arranged at the top end of the transmission shaft and passes through the front cover and The inner racks are meshed, and the first gear and the synchronous wheel are matched with the transmission shaft. The power assembly includes a power device, and an outer rack meshed with the first gear is arranged on one side of the power device, so that the power device drives the first gear, the transmission shaft, the second gear and the synchronous wheel to rotate synchronously, and the first gear drives the sliding seat and the claw assembly to move, and the first synchronous belt is matched with the synchronous wheels of the two groups of transmission assemblies placed on the upper and lower sides of the clamping hole, and the second synchronous belt is matched with the synchronous wheels of the two groups of transmission assemblies placed on the left and right sides of the clamping hole, so that the two groups of first gears placed on the upper and lower sides of the clamping hole and the two groups of first gears placed on the left and right sides of the clamping hole rotate synchronously.

[0006] Furthermore, the gear rack synchronous belt laser pipe cutting machine chuck also includes 4 groups of synchronous support components, and a synchronous support component is arranged between two adjacent groups of transmission components. Each synchronous support component includes a third synchronous wheel and a fourth synchronous wheel. The first synchronous belt is matched with the synchronous wheels and the third synchronous wheels of the two groups of transmission components placed on the upper and lower sides of the clamping hole, and the second synchronous belt is matched with the synchronous wheels and the fourth synchronous wheels of the two transmission components placed on the left and right sides of the clamping hole. The third synchronous wheel supports the first synchronous belt, and the fourth synchronous wheel supports the second synchronous belt.

[0007] Furthermore, the power device is a double-headed cylinder, and cylinder seats are fixedly arranged on the outer sides of both ends of each double-headed cylinder. The double-headed cylinder includes a cylinder body, and a piston is arranged in the cylinder body. The cylinder body is separated into a forward chamber and a reverse chamber by the piston. Cylinder rods are arranged at both ends of the cylinder body, and the two ends of each cylinder rod are fixedly connected to the piston and the cylinder seat respectively to enable the cylinder body to move between the two cylinder seats, and the external rack is fixedly arranged on one side of the cylinder body.

[0008] Furthermore, each synchronous support assembly also includes a rotatable synchronous shaft, and the third synchronous wheel and the fourth synchronous wheel are fixedly arranged on the synchronous shaft so that the third synchronous wheel and the fourth synchronous wheel can be rotatably arranged.

[0009] Furthermore, the clamping hole is a square hole, four groups of jaw assemblies and transmission shafts are arranged at the centers of the four sides of the square hole, and four groups of synchronization shafts are arranged at the four corners of the square hole.

[0010] Furthermore, tension wheel assemblies are respectively arranged on both sides of the transmission shaft, and the tension wheel assemblies include a tension frame, a tension shaft, a mounting seat, and a screw rod. The screw rod is threadedly matched with the mounting seat, the front end of the screw rod is transmission matched with the mounting seat, the bottom end of the mounting seat is slidingly matched with the rotating disk, and the front end of the mounting seat is rotatably arranged with a tension shaft, and a first tension wheel and a second tension wheel are arranged on the tension shaft, so that the mounting seat is driven to move when the screw rod rotates, and the first tension wheel adjusts the tightness of the first synchronous belt, and the second tension wheel adjusts the tightness of the second synchronous belt.

[0011] Furthermore, a rectangular sliding seat cavity is set at the bottom of the sliding seat, the inner rack is set on the inner wall of one side of the sliding seat cavity, the front end surface of the front cover is respectively provided with sliding grooves at the centers of the four sides of the clamping hole, a through hole suitable for the first gear to pass through is set in the sliding groove, and the bottom of the sliding seat is slidably matched with the sliding groove.

[0012] Furthermore, the claw assembly includes a claw seat, the bottom end of which is fixedly connected to the sliding seat, and a roller is rotatably arranged at the front end of the claw seat.

[0013] Furthermore, the chuck of the gear rack synchronous belt laser pipe cutting machine also includes a stand and an air intake ring, the stand is provided with a bearing assembly, the inner ring of the bearing of the bearing assembly is fixedly connected to the rotating disk through the air intake ring, and the air intake ring is fixedly connected to the outer ring of the bearing, so that the inner ring of the bearing drives the rotating disk to rotate; a first ring groove and a second ring groove are coaxially arranged on the end surface of the air intake ring, a forward air intake hole communicating with the first ring groove and a reverse air intake hole communicating with the second ring groove are arranged on the ring wall of the air intake ring, and a first sealing gasket and a second sealing gasket are respectively arranged in the first ring groove and the second ring groove. The back of the rotating disk is coaxially provided with a first ring platform, a second ring platform, a third ring platform, and a fourth ring platform, a third ring groove is formed between the first ring platform and the second ring platform, and a fourth ring groove is formed between the third ring platform and the fourth ring platform. When assembled, the first ring platform and the second ring platform extend into the first ring groove, and the third ring platform and the fourth ring platform extend into the second ring groove. The first sealing gasket and the second sealing gasket are provided with air holes, the third ring groove is provided with a first air hole communicating with the front of the rotating disk, and the fourth ring groove is provided with a second air hole communicating with the front of the rotating disk. The forward chamber and the reverse chamber are provided with air holes. A forward air inlet joint and a reverse air inlet joint are respectively arranged on the chamber, and the first air hole and the second air hole are respectively communicated with the forward air inlet joint and the reverse air inlet joint through the forward pipeline and the reverse pipeline. When in use, the gas used to control the action of the double-headed cylinder enters the first annular groove through the forward air inlet hole, and after the gas fills the cavity formed by the first annular groove and the first sealing gasket, the first sealing gasket is closely attached to the first annular platform and the second annular platform, and the third annular groove is covered by the first sealing gasket, and the gas enters the third annular groove through the air hole, and enters through the first air hole, the forward pipeline, and the forward air inlet joint. The gas enters the forward chamber of the double-headed cylinder to drive the cylinder body to move forward. When the cylinder body needs to move in the reverse direction, the gas used to control the action of the double-headed cylinder enters the second ring groove through the reverse air inlet hole. After the gas fills the second ring groove and the cavity formed by the second sealing gasket, the second sealing gasket clings to the third ring platform and the fourth ring platform, and the fourth ring groove is covered by the second sealing gasket. The gas enters the fourth ring groove through the air hole, and enters the reverse chamber of the double-headed cylinder through the second air hole, the reverse pipeline, and the reverse air inlet joint to drive the cylinder body to move in the reverse direction, thereby realizing the position adjustment of the roller assembly.

[0014] Furthermore, a forward pressure-maintaining valve is arranged on the forward pipeline, so that gas enters the double-head cylinder through the forward pipeline and the forward pressure-maintaining valve, and the forward pressure-maintaining valve is closed after the cylinder body reaches the desired position to lock the position of the cylinder body; a reverse pressure-maintaining valve is arranged on the reverse pipeline, so that gas enters the double-head cylinder through the reverse pipeline and the reverse pressure-maintaining valve, and the reverse pressure-maintaining valve is closed after the cylinder body reaches the desired position to lock the position of the cylinder body; the forward pressure-maintaining valve is also provided with a forward induction valve, which is communicated with the reverse pipeline through a pipeline, so that when gas is passed into the reverse pipeline, the forward induction valve introduces gas to open the forward pressure-maintaining valve to achieve forward pressure relief; the reverse pressure-maintaining valve is also provided with a reverse induction valve, which is communicated with the forward pipeline through a pipeline, so that when gas is passed into the forward pipeline, the reverse induction valve introduces gas to open the reverse pressure-maintaining valve to achieve reverse pressure relief.

[0015] Furthermore, the forward chambers of the four groups of double-headed cylinders are connected to the first air holes via forward pipelines, and forward control valves are respectively arranged on the forward pipelines of the four groups of double-headed cylinders. The reverse chambers of the four groups of double-headed cylinders are connected to the second air holes via reverse pipelines, and reverse control valves are respectively arranged on the reverse pipelines of the four groups of double-headed cylinders, so that each double-headed cylinder can act simultaneously or individually.

[0016] A laser tube cutting machine comprises the above-mentioned gear rack synchronous belt laser tube cutting machine chuck.

[0017] The technical effects of the invention are as follows: (1) Compared with the prior art, the gear rack synchronous belt laser tube cutting machine chuck of the present invention has a transmission assembly configured as a gear and a rack, and by configuring a first synchronous belt and a second synchronous belt, two symmetrically arranged claw assemblies can move synchronously; (2) The transmission shaft is arranged at the center of the four sides of the square clamping hole, the synchronous shaft is arranged at the four corners of the direction clamping hole, and the tensioning wheel assembly is arranged on both sides of the transmission shaft, which has a compact structure, a reasonable layout, and saves space; (3) By configuring a first synchronous belt and a second synchronous belt, the two groups of claw assemblies arranged above and below can move synchronously, and the left and right groups of claw assemblies can move synchronously. The two groups of claw assemblies can move synchronously; (4) The clamping hole is set as a square hole, which increases the clamping range compared with the circular hole; (5) By setting the first ring groove and the second ring groove on the intake ring, and setting the third ring groove and the fourth ring groove on the rotating disk, and cooperating with the first sealing gasket and the second sealing gasket, the intake function is achieved while the rotating disk rotates; (6) By setting the forward pressure-maintaining valve and the reverse pressure-maintaining valve, the pressure can be maintained after the cylinder moves to the predetermined position, and the position is locked; the setting of the forward induction valve and the reverse induction valve can release the pressure when moving in the other direction, so as to achieve safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the chuck of the gear rack synchronous belt laser pipe cutting machine of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the chuck of the gear rack synchronous belt laser pipe cutting machine of the present invention from another angle;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the claw assembly and the front cover;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure inside the casing;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the casing without the mounting plate;

[0024] Figure 6 It is a three-dimensional structural diagram of the power component and the transmission component;

[0025] Figure 7 is another structural schematic diagram of the power assembly and the transmission assembly;

[0026] Figure 8 It is a three-dimensional structural diagram of the power assembly;

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the synchronous support assembly;

[0028] Fig.10 1 is a schematic diagram of the three-dimensional structure of the mounting plate;

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the first synchronous belt;

[0030] Fig.12 It is a three-dimensional structural schematic diagram of the tensioner assembly;

[0031] Fig.13 1. It is a three-dimensional structural schematic diagram of the claw assembly;

[0032] Fig.14 It is a three-dimensional structural schematic diagram of the sliding seat;

[0033] Fig.15 It is a schematic diagram of the three-dimensional structure of the front cover;

[0034] Fig.16 It is a schematic diagram of the assembly structure of the stand, the intake ring and the inner ring of the bearing;

[0035] Fig.17 This is a schematic diagram of the exploded structure of the stand, intake ring, bearing inner ring, and rotating disk.

[0036] Fig.18 It is a schematic diagram of the three-dimensional structure of the intake ring;

[0037] Fig.19 It is a schematic diagram of the three-dimensional structure of the rotating disk;

[0038] Fig. 20 It is a schematic diagram of the three-dimensional structure of the rotating disk from another angle;

[0039] In the figure:

[0040] Stand 1, bearing inner ring 11, bearing outer ring 12,

[0041] Inlet ring 2, forward air inlet hole 21, reverse air inlet hole 22, first ring groove 23, second ring groove 24,

[0042] Rotating disk 3, housing 31, inner housing 32, mounting plate 33, square hole 34, third annular groove 35, fourth annular groove 36, first air hole 37, second air hole 38,

[0043] Front cover 4, central square hole 41, slide slot 42, through hole 43, mounting column 44, air pipe joint 45,

[0044] Double-head cylinder 5, cylinder body 51, cylinder rod 52, external rack 53, first cylinder seat 54, second cylinder seat 55, forward air inlet joint 56, reverse air inlet joint 57,

[0045] Transmission assembly 6, transmission shaft 61, first gear 62, second gear 63, first synchronous wheel 64, first bearing 65, second bearing 66, second synchronous wheel 67,

[0046] Synchronous support assembly 7, first synchronous belt 71, second synchronous belt 72, synchronous shaft 73, third bearing 74, fourth bearing 75, third synchronous wheel 76, fourth synchronous wheel 77,

[0047] Tensioner assembly 8, tensioner frame 81, tensioner shaft 82, first tensioner 83, second tensioner 84, mounting seat 85, screw rod 86,

[0048] Claw assembly 9, sliding seat 91, sliding seat cavity 92, inner rack 93, sliding block 94, claw seat 95, roller 96, pressing block 97. DETAILED DESCRIPTION

[0049] Example 1

[0050] like Figures 1 to 20 As shown, the gear rack synchronous belt laser pipe cutting machine chuck of this embodiment includes a stand 1, a casing 31, and an air intake ring 2. A rotating disk 3 and a front cover 4 are fixedly arranged at both ends of the casing 31. A square hole 34 is arranged at the center of the rotating disk 3. A square center square hole 41 is arranged at the center of the front cover 4. A square inner shell 32 is arranged in the casing 31. The end of the inner shell 32 is fixedly connected to the rotating disk 3, so that a clamping hole for passing the pipe is formed in the center of the front cover 4, the inner shell 32, and the rotating disk 3.

[0051] Four groups of claw assemblies 9 are symmetrically arranged in pairs around the clamping hole on the front cover 4, and the claw assembly 9 includes a claw seat 95, a sliding seat 91 is fixedly arranged at the bottom end of the claw seat 95, and a roller 96 is rotatably arranged at the front end of the claw seat 95; the front end surface of the front cover 4 is respectively provided with sliding grooves 42 at the centers of the four sides of the central square hole 41, and a through hole 43 is arranged in the sliding groove 42. The bottom end of the sliding seat 91 is slidably matched with the sliding groove 42, and a slider 94 is arranged in the middle of the sliding seat 91, and pressure blocks 97 are arranged on both sides of the sliding groove 42. An L-shaped groove is arranged on the pressure block 97, so that the slider 94 slides in the L-shaped groove of the pressure block after the pressure block 97 is fixed to the front cover 4; a rectangular sliding seat cavity 92 is arranged at the bottom of the sliding seat 91, and an inner rack 93 is arranged on the inner wall of one side of the sliding seat cavity 92.

[0052] A first synchronous belt 71, a second synchronous belt 72, four groups of power components, four groups of transmission components 6, and four groups of synchronous support components 7 are arranged in the casing 31. A mounting plate 33 is arranged in the casing 31. The inner shell 32 passes through the center of the mounting plate 31, and the bottom end of the mounting plate 31 is fixedly connected to the rotating disk 3 via the mounting column 44.

[0053] Each transmission assembly 6 includes a rotatably arranged transmission shaft 61, a first gear 62, and a second gear 63. One end of each transmission shaft 61 is rotatably matched with the rotating disk 3 via a first bearing 65, and the other end of the transmission shaft 61 is rotatably matched with the mounting plate 32 via a second bearing 66, so that the transmission shaft 61 is rotatably arranged; the second gear 63 is fixedly arranged at the top end of the transmission shaft 61 and extends into the sliding seat cavity 92 through the front cover 4 and meshes with the inner rack 93. The first gear 62 is fixedly arranged in the middle of the transmission shaft 61, and the two transmission shafts 61 located on the upper and lower sides of the inner housing 32 are on the first A second synchronous wheel 67 is arranged between the gear 62 and the second bearing 66, that is, the second synchronous wheel 67 on the two transmission shafts 61 on the upper and lower sides of the inner housing 32 is placed in the lower middle part of the transmission shaft 61; a first synchronous wheel 64 is arranged between the first gear 62 and the first bearing 65 on the two transmission shafts 61 on the left and right sides of the inner housing 32, that is, the first synchronous wheel 64 on the two transmission shafts 61 on the left and right sides of the inner housing 32 is placed in the upper middle part of the transmission shaft 61, and the second synchronous wheel 67 and the first synchronous wheel 64 are respectively used to transmit the second synchronous belt 72 and the first synchronous belt 71.

[0054] The power assembly includes a power device, which is a double-headed cylinder 5. A first cylinder seat 54 and a second cylinder seat 55 are fixedly arranged on the outer sides of both ends of each double-headed cylinder 5. The double-headed cylinder 5 includes a cylinder body 51. A piston is arranged in the cylinder body 51, and the cylinder body 51 is separated into a forward chamber and a reverse chamber by the piston. Cylinder rods 52 are arranged at both ends of the cylinder body 51. The two ends of the cylinder rod 52 on one side are fixedly connected to the piston and the first cylinder seat 54, respectively, and the two ends of the cylinder rod 52 on the other side are fixedly connected to the piston and the second cylinder seat 55, respectively, so that the cylinder body 51 moves between the first cylinder seat 54 and the second cylinder seat 55. The outer rack 53 is fixedly arranged on one side of the cylinder body 51, and the outer rack 51 is meshed with the first gear 62, so that the power device drives the first gear 62, the transmission shaft 61, the second gear 63 and the first synchronous wheel 64, or the second synchronous wheel 67 to rotate synchronously, and the first gear 62 drives the sliding seat 91 and the claw assembly 9 to move.

[0055] The gear rack synchronous belt laser pipe cutting machine chuck also includes 4 groups of synchronous support components 7, and the synchronous support components 7 are arranged between two adjacent groups of transmission components 6. Each synchronous support component 7 includes a synchronous shaft 73, a third synchronous wheel 76 and a fourth synchronous wheel 77. The 4 groups of synchronous shafts 73 are arranged on the outside of the four corners of the inner shell 32, and one end of each synchronous shaft 73 is rotatably matched with the rotating disk 3 through the third bearing 74, and the other end of the synchronous shaft 73 is rotatably matched with the mounting plate 33 through the fourth bearing 75, so that the synchronous shaft 73 can be rotatably arranged; the third synchronous wheel 76 and the fourth synchronous wheel 77 are fixedly arranged on the upper and lower parts of the synchronous shaft 73 in sequence. The synchronous wheel 77 and the first synchronous belt 71 cooperate with the first synchronous wheel 64 and the third synchronous wheel 76 of the two groups of transmission components 6 placed on the upper and lower sides of the inner shell 32, and the second synchronous belt 72 cooperates with the second synchronous wheel 67 and the fourth synchronous wheel 77 of the two groups of transmission components 6 placed on the left and right sides of the inner shell 32. The third synchronous wheel 76 supports the first synchronous belt 71, and the fourth synchronous wheel 77 supports the second synchronous belt 72, so that the two groups of first gears 62 placed on the upper and lower sides of the inner shell 32 rotate synchronously, and the two groups of first gears 62 placed on the left and right sides of the inner shell 32 rotate synchronously.

[0056] A group of tensioning wheel assemblies 8 are respectively arranged on both sides of each transmission shaft 61, and each tensioning wheel assembly 8 includes a tensioning frame 81 with a rectangular opening, a tensioning shaft 82, a mounting seat 85, and a screw 86. The screw 86 is threadedly matched with the mounting seat 85, the front end of the screw 86 is transmission matched with the mounting seat 85, the bottom end of the mounting seat 85 is slidingly matched with the rotating disk 3, and the front end of the mounting seat 85 is rotatably set with a tensioning shaft 82, and the first tensioning wheel 83 and the second tensioning wheel 84 are arranged on the tensioning shaft 82, so that when the screw 86 rotates, the mounting seat 85 is driven to move, and the first tensioning wheel 83 adjusts the tightness of the first synchronous belt 71, and the second tensioning wheel 84 adjusts the tightness of the second synchronous belt 72.

[0057] A bearing assembly is arranged on the stand 1, and the bearing inner ring 11 of the bearing assembly passes through the intake ring 2 and is fixedly connected to the rotating disk 3, the intake ring 2 is fixedly connected to the bearing outer ring 12, and a plurality of balls are arranged between the bearing inner ring 11 and the bearing outer ring 12, so that the bearing inner ring 11 drives the rotating disk 3 to rotate, and the bearing outer ring 12 and the intake ring 2 are arranged statically; a first annular groove 23 and a second annular groove 24 are arranged coaxially on the end surface of the intake ring 2, a forward air inlet hole 21 communicating with the first annular groove 23 and a reverse air inlet hole 22 communicating with the second annular groove 24 are arranged on the annular wall of the intake ring 2, and a first annular groove 23 and a second annular groove 24 are arranged in the first annular groove 23 and the second annular groove 24, respectively. The first ring platform, the second ring platform, the third ring platform, and the fourth ring platform are coaxially arranged on the back of the rotating disk 3. A third ring groove 35 is formed between the first ring platform and the second ring platform, and a fourth ring groove 36 is formed between the third ring platform and the fourth ring platform. When assembled, the first ring platform and the second ring platform extend into the first ring groove 23, and the third ring platform and the fourth ring platform extend into the second ring groove 24. The first sealing gasket and the second sealing gasket are provided with air holes. The third ring groove 35 is provided with a first air hole 37 communicating with the front of the rotating disk 3, and the fourth ring groove 36 is provided with a second air hole 38 communicating with the front of the rotating disk 3. The forward chamber and the reverse chamber are respectively provided with The forward air inlet joint 56 and the reverse air inlet joint 57, the first air hole 37 is communicated with the forward air inlet joint 56 through the air pipe joint 45 and the forward pipeline, and the second air hole 38 is communicated with the reverse air inlet joint 57 through the air pipe joint 45 and the reverse pipeline. When in use, the gas used to control the action of the double-headed cylinder 5 enters the first annular groove 23 through the forward air inlet hole 21. After the gas fills the cavity formed by the first annular groove 23 and the first sealing gasket, the first sealing gasket is tightly attached to the first ring platform and the second ring platform, and the third annular groove 35 is covered by the first sealing gasket. The gas enters the third annular groove 35 through the air hole, and passes through the first air hole 37, the forward pipeline, and the forward air inlet joint 57. The joint 56 enters the forward chamber of the double-headed cylinder 5 to drive the cylinder body 51 to move forward. When the cylinder body 51 needs to move in the reverse direction, the gas used to control the action of the double-headed cylinder 5 enters the second annular groove 24 through the reverse air inlet hole 22. After the gas fills the second annular groove 24 and the cavity formed by the second sealing gasket, the second sealing gasket is pressed against the third ring platform and the fourth ring platform, and the fourth annular groove 36 is covered by the second sealing gasket. The gas enters the fourth annular groove 36 through the air hole, and enters the reverse chamber of the double-headed cylinder 5 through the second air hole 38, the reverse pipeline, and the reverse air inlet joint 57 to drive the cylinder body 51 to move in the reverse direction, thereby realizing the position adjustment of the roller assembly 7.

[0058] Preferably, a forward pressure-maintaining valve is arranged on the forward pipeline, so that gas enters the double-headed cylinder 5 through the forward pipeline and the forward pressure-maintaining valve, and the cylinder body 51 reaches the desired position, and then the forward pressure-maintaining valve is closed to lock the position of the cylinder body 51; a reverse pressure-maintaining valve is arranged on the reverse pipeline, so that gas enters the double-headed cylinder 5 through the reverse pipeline and the reverse pressure-maintaining valve, and the cylinder body 51 reaches the desired position, and then the reverse pressure-maintaining valve is closed to lock the position of the cylinder body 51; the forward pressure-maintaining valve is also provided with a forward induction valve, which is communicated with the reverse pipeline through a pipeline, so that when gas is passed into the reverse pipeline, the forward induction valve introduces gas to open the forward pressure-maintaining valve, thereby realizing forward pressure relief; the reverse pressure-maintaining valve is also provided with a reverse induction valve, which is communicated with the forward pipeline through a pipeline, so that when gas is passed into the forward pipeline, the reverse induction valve introduces gas to open the reverse pressure-maintaining valve, thereby realizing reverse pressure relief.

[0059] Preferably, the forward chambers of the four groups of double-headed cylinders 5 are connected to the first air holes 37 via forward pipelines, and forward control valves are respectively arranged on the forward pipelines of the four groups of double-headed cylinders 5, and the reverse chambers of the four groups of double-headed cylinders 5 are respectively connected to the second air holes 38 via reverse pipelines, and reverse control valves are respectively arranged on the reverse pipelines of the four groups of double-headed cylinders 5, so that each double-headed cylinder 5 can act simultaneously or individually. Specifically, when the two double-headed cylinders 5 on the upper and lower sides of the inner shell 32 act simultaneously, the forces of the two double-headed cylinders 5 are superimposed on the first synchronous belt 71, so that the first gears 62 on the upper and lower sides of the inner shell 32 rotate synchronously to increase the thrust of the sliding seats 91 on the upper and lower sides of the inner shell 32; when only one of the two double-headed cylinders 5 on the upper and lower sides of the inner shell 32 acts and the gas in the forward chamber and reverse chamber of the other double-headed cylinder 5 is exhausted, the force of the single double-headed cylinder 5 acts on the first synchronous belt 71 , to drive the first gears 62 on the upper and lower sides of the inner shell 32 to rotate synchronously. At this time, the sliding seats 91 on the upper and lower sides of the inner shell 32 are subjected to a smaller thrust, which is suitable for clamping thin-walled tubes (for example, thin-walled tubes with a wall thickness of 0.2 mm); similarly, when the two double-headed cylinders 5 on the left and right sides of the inner shell 32 act at the same time, the forces of the two double-headed cylinders 5 are superimposed on the second synchronous belt 72, so that the first gears 62 on the left and right sides of the inner shell 32 rotate synchronously to increase the thrust of the sliding seats 91 on the left and right sides of the inner shell 32. When only one of the two double-headed cylinders 5 on the left and right sides of the inner shell 32 acts and the gas in the forward chamber and the reverse chamber of the other double-headed cylinder 5 is exhausted, the force of the single double-headed cylinder 5 acts on the second synchronous belt 72 to drive the first gears 62 on the left and right sides of the inner shell 32 to rotate synchronously. At this time, the sliding seats 91 on the left and right sides of the inner shell 32 are subjected to a smaller thrust, which is suitable for clamping thin-walled tubes.

[0060] Preferably, the two double-headed cylinders 5 on the upper and lower sides of the inner shell 32 are double-headed cylinders of different specifications, and the two double-headed cylinders 5 on the left and right sides of the inner shell 32 are also double-headed cylinders of different specifications to increase the force range of the corresponding two sliding seats 91 and increase the applicable range of clamping.

[0061] Example 2

[0062] A laser tube cutting machine comprises the above-mentioned gear rack synchronous belt laser tube cutting machine chuck.

[0063] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A gear rack synchronous belt laser pipe cutting machine chuck, characterized in that: The invention comprises a casing, a rotating disk and a front cover are fixedly arranged at two ends of the casing respectively, a clamping hole is arranged in the center of the rotating disk and the front cover, four groups of claw assemblies are symmetrically arranged in pairs around the clamping hole on the front cover, a sliding seat slidably matched with the front cover is arranged at the bottom end of each claw assembly, an inner rack is arranged on the sliding seat, a first synchronous belt, a second synchronous belt, four groups of power assemblies, and four groups of transmission assemblies are arranged in the casing, each transmission assembly comprises a rotatably arranged transmission shaft, a first gear, a second gear and a synchronous wheel, the second gear is fixedly arranged at the top end of the transmission shaft and passes through the front cover to mesh with the inner rack, the first gear, the second gear are meshed with the inner rack, and the first gear, the second gear are fixedly arranged at the top end of the transmission shaft and pass through the front cover to mesh with the inner rack. The step wheel cooperates with the transmission shaft in transmission, and the power assembly includes a power device. An external rack meshing with the first gear is arranged on one side of the power device, so that the power device drives the first gear, the transmission shaft, the second gear and the synchronous wheel to rotate synchronously, and the first gear drives the sliding seat and the claw assembly to move. The first synchronous belt cooperates with the synchronous wheels of the two groups of transmission assemblies placed on the upper and lower sides of the clamping hole, and the second synchronous belt cooperates with the synchronous wheels of the two groups of transmission assemblies placed on the left and right sides of the clamping hole, so that the two groups of first gears placed on the upper and lower sides of the clamping hole rotate synchronously, and the two groups of first gears placed on the left and right sides of the clamping hole rotate synchronously; The gear rack synchronous belt laser pipe cutting machine chuck also includes 4 groups of synchronous support components, a synchronous support component is arranged between two adjacent groups of transmission components, each synchronous support component includes a third synchronous wheel and a fourth synchronous wheel, the first synchronous belt is matched with the synchronous wheels and the third synchronous wheel of the two groups of transmission components arranged on the upper and lower sides of the clamping hole, the second synchronous belt is matched with the synchronous wheels and the fourth synchronous wheel of the two transmission components arranged on the left and right sides of the clamping hole, the third synchronous wheel supports the first synchronous belt, and the fourth synchronous wheel supports the second synchronous belt; The power device is a double-headed cylinder, and cylinder seats are fixedly arranged on the outer sides of both ends of each double-headed cylinder. The double-headed cylinder includes a cylinder body, and a piston is arranged in the cylinder body. The cylinder body is separated into a forward chamber and a reverse chamber by the piston. Cylinder rods are arranged at both ends of the cylinder body, and the two ends of each cylinder rod are fixedly connected to the piston and the cylinder seat respectively, so that the cylinder body can move between the two cylinder seats, and the external rack is fixedly arranged on one side of the cylinder body.

2. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 1 is characterized in that: Each synchronous support assembly further includes a rotatably arranged synchronous shaft, and the third synchronous wheel and the fourth synchronous wheel are fixedly arranged on the synchronous shaft so that the third synchronous wheel and the fourth synchronous wheel can be rotatably arranged; The clamping hole is a square hole, four groups of claw assemblies and transmission shafts are arranged at the centers of the four sides of the square hole, and four groups of synchronization shafts are arranged at the four corners of the square hole.

3. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 2 is characterized in that: A tensioning wheel assembly is respectively arranged on both sides of the transmission shaft, and the tensioning wheel assembly includes a tensioning frame, a tensioning shaft, a mounting seat, and a screw rod. The screw rod is threadedly matched with the mounting seat, the front end of the screw rod is transmission matched with the mounting seat, the bottom end of the mounting seat is sliding matched with the rotating disk, and the front end of the mounting seat is rotatably arranged with a tensioning shaft, and a first tensioning wheel and a second tensioning wheel are arranged on the tensioning shaft, so that the mounting seat is driven to move when the screw rod rotates, and the first tensioning wheel adjusts the tightness of the first synchronous belt, and the second tensioning wheel adjusts the tightness of the second synchronous belt.

4. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 3 is characterized in that: A rectangular sliding seat cavity is arranged at the bottom of the sliding seat, the inner rack is arranged on the inner wall of one side of the sliding seat cavity, the front end surface of the front cover is respectively provided with sliding grooves at the centers of the four sides of the clamping hole, a through hole suitable for the first gear to pass through is arranged in the sliding groove, and the bottom of the sliding seat is slidably matched with the sliding groove.

5. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 4 is characterized in that: The air intake ring is fixedly connected to the bearing outer ring so that the inner ring of the bearing drives the rotating disk to rotate. The air intake ring is coaxially arranged on the end face of the air intake ring, and a positive air intake hole communicating with the first ring groove and a reverse air intake hole communicating with the second ring groove are arranged on the ring wall of the air intake ring. A first sealing gasket and a second sealing gasket are respectively arranged in the first ring groove and the second ring groove. The back face of the rotating disk is coaxially arranged with a first ring groove and a second ring groove. The shaft is provided with a first ring stage, a second ring stage, a third ring stage, and a fourth ring stage, a third ring groove is formed between the first ring stage and the second ring stage, and a fourth ring groove is formed between the third ring stage and the fourth ring stage. When assembled, the first ring stage and the second ring stage extend into the first ring groove, and the third ring stage and the fourth ring stage extend into the second ring groove. The first sealing gasket and the second sealing gasket are provided with air holes, the third ring groove is provided with a first air hole communicating with the front of the rotating disk, and the fourth ring groove is provided with a second air hole communicating with the front of the rotating disk. The positive chamber and the reverse chamber are respectively provided with positive The first air hole and the second air hole are connected with the forward air hole and the reverse air hole respectively through the forward pipeline and the reverse pipeline. When in use, the gas used to control the action of the double-headed cylinder enters the first ring groove through the forward air hole. After the gas fills the cavity formed by the first ring groove and the first sealing gasket, the first sealing gasket is closely attached to the first ring platform and the second ring platform. The third ring groove is covered by the first sealing gasket. The gas enters the third ring groove through the air hole, and enters the double-headed air hole through the first air hole, the forward pipeline, and the forward air hole. The forward chamber of the cylinder is used to drive the cylinder body to move forward. When the cylinder body needs to move in the reverse direction, the gas used to control the action of the double-headed cylinder enters the second ring groove through the reverse air inlet hole. After the gas fills the second ring groove and the cavity formed by the second sealing gasket, the second sealing gasket is pressed against the third ring platform and the fourth ring platform, and the fourth ring groove is covered by the second sealing gasket. The gas enters the fourth ring groove through the air hole, and enters the reverse chamber of the double-headed cylinder through the second air hole, the reverse pipeline, and the reverse air inlet joint to drive the cylinder body to move in the reverse direction, thereby realizing the position adjustment of the roller assembly.

6. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 5, characterized in that: A forward pressure-maintaining valve is arranged on the forward pipeline, so that gas enters the double-head cylinder through the forward pipeline and the forward pressure-maintaining valve, and the forward pressure-maintaining valve is closed after the cylinder body reaches the desired position to lock the position of the cylinder body; a reverse pressure-maintaining valve is arranged on the reverse pipeline, so that gas enters the double-head cylinder through the reverse pipeline and the reverse pressure-maintaining valve, and the reverse pressure-maintaining valve is closed after the cylinder body reaches the desired position to lock the position of the cylinder body; the forward pressure-maintaining valve is also provided with a forward induction valve, which is communicated with the reverse pipeline through a pipeline, so that when gas is passed into the reverse pipeline, the forward induction valve introduces gas to open the forward pressure-maintaining valve to achieve forward pressure relief; the reverse pressure-maintaining valve is also provided with a reverse induction valve, which is communicated with the forward pipeline through a pipeline, so that when gas is passed into the forward pipeline, the reverse induction valve introduces gas to open the reverse pressure-maintaining valve to achieve reverse pressure relief.

7. The gear rack synchronous belt laser pipe cutting machine chuck according to claim 6, characterized in that: The forward chambers of the four groups of double-headed cylinders are connected to the first air holes via forward pipelines, and forward control valves are respectively arranged on the forward pipelines of the four groups of double-headed cylinders. The reverse chambers of the four groups of double-headed cylinders are connected to the second air holes via reverse pipelines, and reverse control valves are respectively arranged on the reverse pipelines of the four groups of double-headed cylinders, so that each double-headed cylinder can act simultaneously or individually.

8. A laser tube cutting machine, characterized in that: It comprises a gear rack synchronous belt laser pipe cutting machine chuck as described in any one of claims 1 to 7.

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