Full stroke heavy duty laser pipe cutting chuck

Abstract

This invention provides a full-stroke heavy-duty laser tube cutting chuck, comprising a frame, a rotary drive mechanism mounted on the frame, a rear cover connected to the rotary drive mechanism, a front cover fixedly connected to the rear cover and having a pair of sliding grooves in both the vertical and horizontal directions, two grippers in both the vertical and horizontal directions in front of the front cover, four cylinders with built-in stroke adjustment mechanisms positioned between the front and rear covers as the driving power source for the four grippers, a transmission mechanism between each of the four cylinders and the corresponding four grippers, a synchronization mechanism for achieving synchronous movement of the two vertical and two horizontal grippers, and a displacement detection mechanism for detecting the distance between the two pairs of grippers by detecting the cylinder stroke. Through structural improvements, this invention achieves anti-flattening function of the grippers and the ability to cross deep grooves on the surface of the workpiece with a simpler structure, while reducing the overall structure, saving manufacturing and transportation costs, and improving the automation level of the laser cutting machine production line.

Description

Technical Field

[0001] This invention relates to the field of laser tube cutting auxiliary tools technology, specifically to a full-stroke heavy-duty laser tube cutting chuck. Background Technology

[0002] A chuck is an essential auxiliary tool used to clamp the workpiece during laser cutting machine operation. Laser tube cutting chucks are classified into pneumatic chucks powered by cylinders and electric chucks powered by motors, depending on the driving force. Pneumatic chucks are more common and widely used. Currently, a typical pneumatic chuck consists of a front cover, a rear cover, a pair of transverse jaws and a pair of longitudinal jaws movably mounted on the front cover, four sliders movably mounted in four grooves on the front cover, a drive mechanism located between the front and rear covers that drives the two pairs of jaws to move accordingly by driving the sliders, a synchronization mechanism for achieving synchronous movement of the two pairs of jaws, a frame serving as the mounting base, and a rotary drive mechanism mounted on the frame for driving the front and rear covers and the mechanism mounted thereon to rotate, thereby rotating the two pairs of jaws. The drive mechanism uses a cylinder as power, and through a transmission mechanism, drives the sliders and the jaws fixed on the sliders to move towards or away from each other to clamp or release the workpiece. Pneumatic chucks typically employ two sets of jaws that can engage independently in a full-stroke chuck. However, when clamping thin or fragile pipes, the jaw stroke is difficult to control. If the jaws are loose, the pipe may fall off; if they are tight, the pipe may be flattened or crushed, rendering it unusable. To address this issue, current methods primarily involve installing a dedicated anti-flattening mechanism within the chuck. For example, Chinese patent document No. 217394083U discloses an anti-flattening device for a laser pipe cutting chuck, and Chinese patent document No. 217394081U discloses an anti-flattening mechanism for a laser pipe cutting chuck. While these anti-flattening mechanisms or devices offer good anti-flattening effects, they present technical challenges, such as the difficulty of installation within the limited space inside the chuck and increased manufacturing costs. Due to structural limitations, existing full-stroke heavy-duty laser tube cutting chucks can only achieve the technical requirements of large-diameter workpiece clamping holes, full-stroke movement of the jaws, heavy-duty output, and anti-flattening by increasing the overall size of the chuck. This results in higher manufacturing, transportation, installation, and usage costs. Furthermore, existing pneumatic full-stroke heavy-duty laser tube cutting chucks typically lack automatic jaw stroke detection functions, which hinders the improvement of automation levels in laser cutting machine production lines. In addition, due to structural limitations, when using existing pneumatic full-stroke heavy-duty laser tube cutting chucks to process workpieces with deep grooves on the surface, the jaw rollers may enter the working grooves and become unable to retract, leading to serious accidents such as machine collisions, overloads, or injuries. Summary of the Invention

[0003] The purpose of this invention is to provide a structurally improved full-stroke heavy-duty laser tube cutting chuck to solve the corresponding technical problems existing in similar chucks.

[0004] The technical solution of this invention is as follows: The full-stroke heavy-duty laser tube cutting chuck of this invention includes a frame as a mounting base, a rotary drive mechanism mounted on the frame, a rear cover transmittedly connected to the rotary drive mechanism, a front cover fixedly connected to the rear cover and located in front of the rear cover, with a pair of sliding grooves in the vertical and horizontal directions, two grippers in the vertical and horizontal directions in front of the front cover, four cylinders located between the front cover and the rear cover and serving as the driving power source for the four grippers, and a transmission mechanism between each of the four cylinders and the corresponding four grippers, for a synchronization mechanism to realize the synchronous movement of the two vertical grippers and the two horizontal grippers respectively. Its structural feature is that the cylinders are cylinders with built-in stroke adjustment mechanisms, each cylinder including a hollow cylindrical cylinder body with openings at both ends, and first and second cylinder covers that are airtightly fixedly connected to the two open ends of the cylinder body, and airtightly movably disposed within the cylinder body. The piston has an inner end fixedly connected to the piston and an outer end that extends movably and airtightly from the cylinder head. The piston rod is an open-end rod with a closed outer end and a countersunk hole axially extending from the open end. The stroke adjustment mechanism includes an adjusting screw, an adjusting nut, a seal, a first retaining ring, and a second retaining ring. The adjusting screw has a rod body and a screw head. The rod body of the adjusting screw passes airtightly through the sealed end of the cylinder body and the piston and extends into the countersunk hole of the piston rod. The screw head of the adjusting screw is located outside the sealed end of the cylinder body. The adjusting nut is located in the countersunk hole of the piston rod and is threadedly connected to the adjusting screw, allowing linear movement. The first retaining ring is fixedly located on the inner side of the sealed end of the cylinder body and on the outer periphery of the rod body of the adjusting screw. The second retaining ring is fixedly located on the end of the adjusting screw that extends into the countersunk hole of the piston rod. The pressure cap is fixedly located in the mounting clearance countersunk hole of the piston and connected to the inner end of the piston rod.

[0005] A further solution is as follows: each cylinder is equipped with a set of cylinder movable support components. Each set of cylinder movable support components includes a guide bracket that is fixedly connected to the front cover and the rear cover respectively, two guide rails fixedly mounted on the guide bracket, two sliding blocks movably mounted on each guide rail, and a piston rod connector fixedly mounted on the extended end of the piston rod of the cylinder. Each sliding block is fixedly connected to the same side of the cylinder body, and the piston rod connector is fixedly mounted on the extended end of the piston rod. Each piston rod connector is fixedly connected to a corresponding mounting connecting post.

[0006] A further embodiment is as follows: The aforementioned transmission mechanism includes a power output rack, a double gear, a power wedge, a transmission gear, a fixed rack, and a slider; the power output rack is fixedly mounted on the cylinder body; the double gear includes a large gear and a small gear that can rotate coaxially, with the large gear meshing with the power output rack for transmission; one side of the power wedge is provided with transmission teeth, and the power wedge is slidably mounted in one of the four slots of the front cover by its transmission teeth meshing with the small gear of the double gear; the transmission gear is embedded and rotatably mounted in the middle of the power wedge and moves with the power wedge; the fixed rack is fixedly mounted on the rear end face of the front cover and meshes with the transmission gear, allowing the transmission gear to rotate based on the fixed rack; the rear end face of the slider is provided with transmission teeth, and the slider is slidably mounted in the power wedge by its transmission teeth meshing with the transmission gear, and the slider is located on the front side of the power wedge; each slider has a clamp fixedly mounted on its front end face.

[0007] A further proposed solution is to have a gear ratio of 2:1 between the large and small gears of the aforementioned double gear system.

[0008] A further embodiment is as follows: The aforementioned synchronization mechanism includes four synchronization chains, eight chain support rollers, and four roller shafts; the front and rear ends of the four roller shafts are respectively fixedly connected to the front and rear covers; two of the eight chain support rollers are rotatably arranged on each of the four roller shafts, one in the front and one in the back; two of the four synchronization chains are arranged in the front and two in the back; the two synchronization chains on the front side are respectively fixedly connected to the cylinder bodies of two cylinders that drive the left and right grippers to move, and the two synchronization chains on the front side are movably tensioned on the two chain support rollers on the front of each of the left and right ends; the two synchronization chains on the rear side are respectively fixedly connected to the cylinder bodies of two cylinders that drive the up and down grippers to move, and the two synchronization chains on the rear side are movably tensioned on the two chain support rollers on the rear of each of the left and right ends.

[0009] A further solution is that the aforementioned full-stroke heavy-duty laser tube cutting chuck also includes a displacement detection mechanism for detecting the cylinder stroke, which serves as the power source for the up-down grippers, and the cylinder stroke, which serves as the power source for the left-right grippers.

[0010] A further solution is as follows: The displacement detection mechanism includes two displacement sensors, a programmable logic controller (PLC), a wireless communication module, and a power supply module. Each displacement sensor has a transmission body and a detection rod that can extend and retract within the transmission body. The transmission bodies of both displacement sensors, the PLC, the wireless communication module, and the power supply module are all fixedly mounted on the inner end face of the front cover. The detection rod of one displacement sensor is fixedly connected to a cylinder that drives the vertical gripper movement, and the detection rod of the other displacement sensor is fixedly connected to a cylinder that drives the horizontal gripper movement. Both displacement sensors and the wireless communication module are electrically connected to the PLC, and the power supply module provides operating power to the displacement detection mechanism. In use, the displacement detection mechanism communicates wirelessly with the laser tube cutting production line control host via the wireless communication module.

[0011] A further solution is: both the front cover and the rear cover are integrally disc-shaped structural components. The middle of both the front cover and the rear cover is provided with a square clamping hole that runs through the front and rear for the workpiece to pass through during use. The clamping holes of the front cover and the rear cover together constitute the workpiece receiving hole.

[0012] A further option is to detachably provide an intermediate dust cover for a square cylindrical plate structure within the aforementioned workpiece receiving hole.

[0013] A further option is to provide a dust cover around the periphery of a ring-shaped thin plate between the outer periphery of the aforementioned front cover and rear cover.

[0014] The present invention has the following positive effects: (1) The present invention improves the structure of the cylinder that serves as the power source for the gripper and sets up a stroke adjustment mechanism in the cylinder so that the stroke of the cylinder can be easily adjusted according to different workpieces. This enables the stroke of the power cylinder to control the final gripping position of the gripper, thereby realizing the gripper's anti-flattening function and the function of crossing the deep groove on the surface of the workpiece. This effectively solves the technical problems of existing chucks, such as the difficulty of installation and setting up the limited space in the chuck, the increased cost, and the possibility that the rollers of the gripper may enter the working groove and cannot be withdrawn when processing workpieces with deep grooves on the surface, leading to serious accidents such as machine collision, overload, or injury. (2) The present invention improves the overall structure, especially the transmission mechanism between the power cylinder and the gripper, so that it can achieve the technical requirements of large diameter, full stroke movement of the gripper, heavy load output, and anti-flattening, while significantly reducing the overall size compared with the existing full stroke heavy load laser tube cutting chuck. This can greatly reduce the manufacturing, transportation, installation and use costs of the chuck. (3) By setting a displacement detection mechanism, the present invention can automatically detect the travel of the gripper and thus automatically detect the external dimensions of the workpiece. It can assist the control host of the laser tube cutting production line in judging whether the workpiece, chuck and laser cutting equipment are working properly, avoid the workpiece from colliding with the expensive cutting elements of the laser cutting machine, and help improve the automation level of the laser cutting machine production line. Attached Figure Description

[0015] Figure 1 This is a frontal view of the overall structure of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 To remove Figure 2 A schematic diagram of the three-dimensional structure of the front cover, outer dust cover, and the middle dust cover;

[0018] Figure 4 This is a cross-sectional view of the cylinder of the present invention;

[0019] Figure 5 This is a simplified planar structural diagram of the synchronization mechanism and transmission mechanism of the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the cylinder and transmission mechanism of the present invention.

[0021] Figure 7 for Figure 6 The right view;

[0022] Figure 8 for Figure 6Sectional view along axis AA;

[0023] Figure 9 This is a schematic diagram of the displacement detection mechanism provided on the rear end face of the front cover according to the present invention.

[0024] Figure 10 for Figure 9 A schematic diagram of the structure in which the displacement sensor is installed on the front cover and the cylinder.

[0025] The reference numerals in the above figures are as follows:

[0026] Gripper 1; Front cover 2; Rear cover 3;

[0027] Cylinder 4, cylinder body 41, cylinder head 42, first cylinder head 42-1, second cylinder head 42-2, piston 43, piston rod 44, stroke adjustment mechanism 45, adjusting screw 45-1, adjusting nut 45-2, seal 45-3, first retaining ring 45-4, second retaining ring 45-5, gland 45-6; cylinder movable support assembly 46, guide bracket 46-1, guide rail 46-2, sliding block 46-3, piston rod connector 46-4, piston rod support column 46-5;

[0028] Transmission mechanism 5, power output rack 51, double gear 52, large gear 52-1, small gear 52-2, power wedge 53, transmission gear 53-1, transmission gear 54, fixed rack 55, slider 56;

[0029] Synchronization mechanism 6, synchronization chain 61, chain support roller 62, roller shaft 63;

[0030] Displacement detection mechanism 7, displacement sensor 71, transmission body 71-1, signal output terminal 71-1-1, detection rod 71-2, programmable logic controller 72, wireless communication module 73, power supply module 74;

[0031] Frame 8; rotary drive mechanism 9; workpiece receiving hole 100; outer dust cover 101; middle dust cover 102. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] (Example 1)

[0034] In this embodiment, when describing the orientation, it uses... Figure 1 The direction being faced is the front as described, with the back to the front. Figure 1 The direction it faces is the rear, as described. Figure 1 The up-down and left-right directions in the text are still the same as those in the description.

[0035] See Figures 1 to 10 The full-stroke heavy-duty laser tube cutting chuck of this embodiment mainly consists of a gripper 1, a front cover 2, a rear cover 3, a cylinder 4, a transmission mechanism 5, a synchronization mechanism 6, a displacement detection mechanism 7, a frame 8, and a rotary drive mechanism 9.

[0036] The gripper 1 is used by the chuck of this embodiment to hold the workpiece during operation. The gripper 1 can be a roller-type or non-roller-type gripper in the prior art, and a roller-type gripper is preferred. The gripper 1 includes two grippers arranged vertically and two grippers arranged horizontally; the gripper 1 is prior art, and its structure will not be described in detail.

[0037] The front cover 2 is a disc-shaped structural component. A circular or square clamping hole, which runs through the center of the front cover 2, is provided for the workpiece to be clamped during use. In this embodiment, the clamping hole is preferably square. The front cover 2 has two sliding grooves each in the horizontal and vertical directions; the inner ends of all four sliding grooves communicate with the clamping hole.

[0038] The rear cover 3 is a disc-shaped structural component. The middle of the rear cover 3 is provided with a clamping hole that is corresponding to the clamping hole of the front cover 2 and runs through it in the front and back directions. The clamping holes of the front cover 2 and the rear cover 3 together constitute the workpiece receiving hole 100 of the chuck in this embodiment.

[0039] Cylinder 4 serves as the power source for the movement of the gripper 1. Corresponding to the four grippers 1, there are four cylinders 4 with identical structures, each cylinder 4 serving as the power source for one gripper 1. Unlike the cylinder structure of existing pneumatic chucks that use cylinders as power sources, the cylinder 4 in this embodiment is a stroke-adjustable cylinder with a built-in stroke adjustment mechanism. This allows the cylinder, as the power source, to accurately control the movement position of the gripper 1 (i.e., the clamping position during operation), thereby achieving the gripper 1's anti-flattening function and its ability to cross deep grooves on the surface of the workpiece.

[0040] See Figure 4As a specific implementation, the cylinder 4 mainly consists of a cylinder body 41, a cylinder head 42, a piston 43, a piston rod 44, and a stroke adjustment mechanism 45. The cylinder body 41 is a hollow cylindrical structure with openings at both ends; the cylinder head 42 includes a first cylinder head 42-1 and a second cylinder head 42-2, each of which is airtightly and fixedly connected to one open end of the cylinder body 41; the piston 43 is airtightly and movably disposed inside the cylinder body 41, dividing the space inside the cylinder body 41 into two air chambers, and a mounting clearance countersunk hole is provided in the middle of one side of the piston 43; unlike the solid piston rod of the cylinder commonly used in similar pneumatic chucks, the piston rod 44 of this embodiment is a rod with an open inner end, a closed outer end, and a countersunk hole provided axially from the open end, the inner end of the piston rod 44 is integrally or fixedly connected to the piston 43, the inner end opening of the piston rod 44 communicates with the mounting clearance countersunk hole of the piston 43, and the outer end of the piston rod 44 is airtightly and movably extended outward from the middle of the cylinder head 42.

[0041] The stroke adjustment mechanism 45 mainly consists of an adjusting screw 45-1, an adjusting nut 45-2, a seal 45-3, a first retaining ring 45-4, a second retaining ring 45-5, and a pressure cap 45-6. The adjusting screw 45-1 has a rod body and a screw head. The rod body of the adjusting screw 45-1 passes through the first cylinder head 42-1 of the cylinder 4 and the pressure cap 45-6 in an airtight manner through the seal 45-3 and then extends into the countersunk hole of the piston rod 44. The screw head of the adjusting screw 45-1 is located on the outside of the first cylinder head 42-1 of the cylinder 4. The adjusting nut 45-2 is located in the countersunk hole of the piston rod 44 and is threadedly connected to the adjusting screw 45-1. It is linearly movable but non-rotatable and is located on the rod body of the adjusting screw 45-1. The first retaining ring 45-4 is fixedly mounted on the inner side of the first cylinder head 42-1 of the cylinder 4 and located on the outer periphery of the adjusting screw 45-1. The first retaining ring 45-4 is used to prevent the adjusting screw 45-1 from moving outward of the closed end of the cylinder body 41 of the cylinder 4 during use. The second retaining ring 45-5 is fixedly mounted on the end of the adjusting screw 45-1 that extends into the countersunk hole of the piston rod 44. The second retaining ring 45-5 is used to prevent the adjusting nut 45-2 from falling off the adjusting screw 45-1 during stroke adjustment operation and use. The pressure cap 45-6 is fixedly mounted in the mounting clearance countersunk hole of the piston 43 and connected to the inner end of the piston rod 44.

[0042] The method for adjusting the stroke of the piston rod 44 of the cylinder 4 using the stroke adjustment mechanism 45 is as follows: The adjusting screw 45-1 is rotated by rotating the screw head of the adjusting screw 45-1. The adjusting nut 45-2 moves linearly relative to the adjusting screw 45-1 within the countersunk hole of the piston rod 44. Based on the required maximum extension length of the piston rod 44 (i.e., the maximum stroke of the piston rod 44), the adjusting nut 45-2 is moved to the corresponding position on the adjusting screw 45-1. During operation, when the piston rod 44 extends outward, the movement of the piston 43 is blocked by the adjusting nut 45-2 when the pressure cap 45-6 fixed on the piston 43 contacts it. The piston rod 44 then stops extending outward, reaching the set stroke. This causes the corresponding gripper 1 to move to the set clamping position, achieving the anti-flattening function of preventing the gripper 1 from flattening the workpiece and the function of the gripper 1 crossing the deep groove on the profile surface.

[0043] See Figure 3 and Figure 5 Each cylinder 4 is equipped with a set of cylinder movable support assembly 46 for supporting the movement of the cylinder 4 and fixing the front cover 2 and the rear cover 3. Each set of cylinder movable support assembly 46 includes a guide bracket 46-1 fixedly connected to the front cover 2 and the rear cover 3, two guide rails 46-2 fixedly mounted on the guide bracket 46-1, two sliding blocks 46-3 movably mounted on each guide rail 46-2, a piston rod connector 46-4 fixedly mounted on the extended end of the piston rod 44 of the cylinder 4, and a piston rod support column 46-5 fixedly mounted between the front cover 2 and the rear cover 3; each sliding block 46-3 is fixedly connected to the same side of the cylinder body 41 of the cylinder 4, the piston rod connector 46-4 is fixedly mounted on the extended end of the piston rod 44 of the cylinder 4, and each piston rod connector 46-4 is fixedly connected to a corresponding piston rod support column 46-5. When the cylinder 4 is in operation, the piston rod 44 is fixed at the extended end, so the cylinder body 41 moves by sliding on the two guide rails 46-2 with the help of four sliding blocks 46-3.

[0044] See Figure 2 , 3 and Figures 6 to 8The transmission mechanism 5 is used to realize the transmission between the cylinder 4 and the gripper 1. Four sets of the transmission mechanism 5 are provided, one set for each cylinder 4 and one corresponding gripper 1. The transmission mechanism 5 includes a power output rack 51, a double gear 52, a power wedge 53, a transmission gear 54, a fixed rack 55, and a slider 56. The power output rack 51 is fixedly mounted on the cylinder body 41 of the cylinder 4; the double gear 52 includes a large gear 52-1 and a small gear 52-2 that can rotate coaxially between the front cover 2 and the rear cover 3. In this embodiment, the gear ratio of the large gear 52-1 to the small gear 52-2 is preferably 2:1. The large gear 52-1 of the double gear 52 meshes with the power output rack 51 for transmission; one side of the power wedge 53 is provided with a transmission tooth 53-1, and the power wedge 53 is driven by its transmission tooth 53-1 and the small gear 52-1 of the double gear 52. The four jaws 1 are slidably disposed in one of the four grooves of the front cover 2; the transmission gear 54 is rotatably disposed in the middle of the power wedge 53 and moves with the power wedge 53; the fixed rack 55 is fixedly disposed on the rear end face of the front cover 2 and meshes with the transmission gear 54, so that the transmission gear 54 can rotate by means of the fixed rack 55; the rear end face of the slider 56 is provided with transmission teeth, and the slider 56 is slidably disposed in the power wedge 53 and located on the front side of the power wedge 53 by means of its transmission teeth meshing with the transmission gear 54. The aforementioned four jaws 1 are fixedly disposed on the front end face of each slider 56.

[0045] The transmission mechanism 5 realizes the transmission process of the cylinder 4 driving the gripper 1 to move as follows: When the cylinder 4 is in and out of the cylinder, the cylinder body 41 of the cylinder 4 moves relative to the piston rod 44 by relying on the cylinder movable support component 46. The movement of the cylinder body 41 causes the power output rack 51 fixed on the cylinder body 41 to move synchronously. The movement of the power output rack 51 causes the small gear 52-2 of the double gear 52 to rotate through the transmission of the large gear 52-1 of the double gear 52. The rotation of the small gear 52-2 drives the power wedge 53 meshing with it to slide in the groove of the front cover 2. The sliding of the power wedge 53 causes the transmission gear 54 embedded in the power wedge 53 to rotate by relying on the fixed rack 55. The rotation of the fixed rack 55 causes the slider 56 meshing with it to slide in the power wedge 53, thereby causing the gripper 1 fixed on the slider 56 to move.

[0046] In this embodiment, the power of cylinder 4 is transmitted to power wedge 53 through power output rack 51 and double gear 52. The torque of the large gear 52-1 (force input) and small gear 52-2 (force output) of double gear 52 is the same. Since the gear ratio of large gear 52-1 and small gear 52-2 is 2:1, the output force of small gear 52-2 is twice the input force of large gear 52-1, thereby realizing the heavy-load output of chuck in this embodiment. As can be seen from the aforementioned transmission mechanism 5, during operation, slider 56 drives jaw 1 to center and clamp the workpiece at twice the movement speed of power wedge 53. This allows power wedge 53 to make jaw 1 move in its full stroke with a small movement stroke. As a result, the overall size of chuck in this embodiment can be significantly reduced compared to similar chucks, thereby greatly reducing the manufacturing, transportation, installation and use costs of chuck.

[0047] See Figure 3 and Figure 5 The synchronization mechanism 6 is used to achieve synchronous movement of the two vertical grippers 1 and the two horizontal grippers 1. In one specific implementation, the synchronization mechanism 6 includes four synchronization chains 61, eight chain support rollers 62, and four roller shafts 63. The front and rear ends of the four roller shafts 63 are fixedly connected to the front cover 2 and the rear cover 3, respectively, and one is provided at each of the four corners of the workpiece receiving hole 100 of the chuck in this embodiment. Two chain support rollers 62 are rotatably arranged on each of the four roller shafts 63, one at the front and one at the rear. Two synchronization chains 61 are arranged on each of the four roller shafts 63, with the two synchronization chains 61 located at the front being... Each end of the two cylinders 4 driving the left and right grippers 1 is fixedly connected to the cylinder body 41 of the two cylinders 4 that drive the left and right grippers 1 to move. The two synchronous chains 61 located at the front are movably tensioned on the two chain support rollers 62 at the front of each of the left and right ends. The two synchronous chains 61 located at the rear are fixedly connected to the cylinder body 41 of the two cylinders 4 driving the up and down grippers 1 to move. The two synchronous chains 61 located at the rear are movably tensioned on the two chain support rollers 62 at the rear of each of the left and right ends. Thus, during operation, the two cylinders 4 driving the left and right grippers 1 to move synchronously under the constraint of the two synchronous chains 61, thereby causing the left and right grippers 1 to move synchronously. Similarly, the two cylinders 4 driving the up and down grippers 1 to move synchronously under the constraint of the other two synchronous chains 61, thereby causing the up and down grippers 1 to move synchronously.

[0048] See Figure 9 and Figure 10The displacement detection mechanism 7 is used to detect the displacement information of the cylinder 4 and convert it into the displacement information of the gripper 1, thereby obtaining the vertical and horizontal outer perimeter dimensions of the workpiece and wirelessly feeding it back to the control host of the laser cutting production line for comparison and judgment on whether the workpiece or equipment is working properly. In one specific embodiment, the displacement detection mechanism 7 includes two displacement sensors 71, a programmable logic controller (PLC) 72, a wireless communication module 73, and a power supply module 74. In this embodiment, the displacement sensor 71 is a commercially available WY-01-250 model displacement sensor. The displacement sensor 71 has a transmission body 71-1 and a detection rod 71-2 that can extend and retract within the transmission body 71-1. The transmission body 71-1 is provided with a signal output terminal 71-1-1. The transmission bodies 71-1, programmable logic controller 72, wireless communication module 73, and power module 74 of the two displacement sensors 71 are all fixedly mounted on the inner end face of the front cover 2. The detection rod 71-2 of one displacement sensor 71 is fixedly connected to the cylinder body 41 of a cylinder 4 used to drive the vertical gripper 1 to move, and the detection rod 71-2 of the other displacement sensor 71 is fixedly connected to the cylinder body 41 of a cylinder 4 used to drive the horizontal gripper 1 to move. The signal output terminals 71-1-1 of the wireless communication module 73 and the two displacement sensors 71 are electrically connected to the programmable logic controller 72. The power supply module 74 provides operating power to the displacement detection mechanism 7. In use, the displacement detection mechanism 7 communicates wirelessly with the control host of the laser tube cutting production line using the chuck in this embodiment through the wireless communication module 73. The displacement sensors 71, programmable logic controller 72, wireless communication module 73, and power supply module 74 are all commercially available components, and their individual structures and working principles will not be described in detail.

[0049] The working principle of the displacement detection mechanism 7 is as follows: During operation, the two cylinders 4 used to drive the vertical grippers 1 move synchronously with the same stroke. Therefore, only one displacement sensor 71 is needed to detect the stroke of one cylinder. Since the two cylinders are identical to the transmission mechanism 5 between the two vertical grippers 1, there is a one-to-one correspondence between the stroke of cylinder 4 and the stroke of the two vertical grippers 1. The displacement sensor 71 sends the detected stroke information of cylinder 4 to the programmable logic controller 72 in real time. The programmable logic controller 72 then converts the real-time stroke information of cylinder 4 into distance information between the two vertical grippers 1 and sends it to the laser tube cutting production line control host via the wireless communication module 73. Similarly, the two cylinders 4 used to drive the horizontal grippers 1 move synchronously with the same stroke. Therefore, only one displacement sensor 71 is needed to detect the stroke of one cylinder. Since the two cylinders are identical to the transmission mechanism 5 between the two horizontal grippers 1, the stroke of cylinder 4 corresponds to the stroke of the two vertical grippers 1. There is a one-to-one correspondence between the strokes of the two grippers 1. The displacement sensor 71 sends the detected stroke information of the cylinder 4 to the programmable logic controller 72 in real time. The programmable logic controller 72 can then convert the real-time stroke information of the cylinder 4 into the distance information between the two left-right grippers 1 and send it to the control host of the laser tube cutting production line via the wireless communication module 73. When the two left-right grippers 1 and the two up-down grippers 1 move to the set position, the distance between the two left-right grippers 1 and the distance between the two up-down grippers 1 are the detected external dimensions of the workpiece. The control host of the laser tube cutting production line compares the distance information between the two up-down grippers 1 and the two left-right grippers 1 sent in real time by the displacement detection mechanism 7 with the corresponding dimensions of the workpiece built in, so as to determine whether the workpiece and the equipment are in normal working condition, avoid the workpiece from colliding with the valuable cutting elements of the laser cutting machine, and improve the automation level of the laser cutting machine production line.

[0050] The frame 8 serves as the mounting base for the chuck in this embodiment, and the aforementioned rear cover 3 is rotatably mounted on the frame 8. The rotary drive mechanism 9 is located on the frame 8 and is used to drive the aforementioned rear cover 3, front cover 2, and all components located on the rear cover 3 and front cover 2 to rotate as a whole, so that the four grippers 1 can hold the workpiece and rotate together during operation. The frame 8 and the rotary drive mechanism 9 are both mature existing technologies, and their structure and installation relationship will not be described in detail.

[0051] The outer peripheral dust cover 101 is a thin, annular plate component. It is fixedly disposed between the outer peripheries of the front cover 2 and the rear cover 3, and serves to prevent dust and debris from entering the chuck from between the outer ends of the front cover 2 and the rear cover 3. The outer peripheral dust cover 101 is a preferred embodiment.

[0052] The intermediate dust cover 102 is a cylindrical plate structure whose end face shape is adapted to the shape (circular or square) of the clamping holes of the front cover 2 and the rear cover 3. In this embodiment, the intermediate dust cover 102 adopts a square cylindrical structure. Unlike the prior art, where this component usually also serves as an installation base, in this embodiment, the intermediate dust cover 102 is only used to prevent dust from entering the chuck during use and does not serve as an installation base for other components. The front and rear ends of the intermediate dust cover 102 are detachably installed in the clamping holes of the front cover 2 and the rear cover 3. The detachable installation method of the intermediate dust cover 102 in this embodiment allows it to be removed separately, facilitating adjustment, maintenance, and repair of the chuck's interior. The intermediate dust cover 102 is provided as a preferred embodiment.

[0053] 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 full-stroke heavy-duty laser tube cutting chuck, comprising a frame as a mounting base, a rotary drive mechanism mounted on the frame, a rear cover driven by the rotary drive mechanism, a front cover fixedly connected to the rear cover and located in front of the rear cover, having a pair of vertical and horizontal sliding grooves on it, two grippers in the vertical and horizontal directions in front of the front cover, four cylinders located between the front cover and the rear cover serving as driving power sources for the four grippers, and a transmission mechanism between each of the four cylinders and the corresponding four grippers, for a synchronization mechanism to realize the synchronous movement of the two vertical grippers and the two horizontal grippers, characterized in that: The cylinder is a cylinder with a built-in stroke adjustment mechanism. The cylinder includes a hollow cylindrical body with openings at both ends, first and second cylinder heads that are airtightly fixed to the two open ends of the cylinder body, a piston that is airtightly movably disposed within the cylinder body, and a piston rod whose inner end is integrally or fixedly connected to the piston and whose outer end is airtightly movably extended outward from the second cylinder head. The piston rod is a rod component with an open inner end, a closed outer end, and a countersunk hole along the axial direction from the open end. A clearance countersunk hole is provided in the middle of one side of the piston. The stroke adjustment mechanism includes an adjusting screw, an adjusting nut, a seal, a first retaining ring, and a second retaining ring. The adjusting screw has a rod body and a screw head. The rod body of the adjusting screw passes through the first cylinder head and the pressure cap in an airtight manner through a sealing element and extends into the countersunk hole of the piston rod. The screw head of the adjusting screw is located on the outside of the first cylinder head. The adjusting nut is located in the countersunk hole of the piston rod and is threadedly connected to the adjusting screw, and is linearly movable on the adjusting screw. The first retaining ring is fixed on the inner side of the first cylinder head and located on the outer periphery of the rod body of the adjusting screw. The second retaining ring is fixed on the end of the adjusting screw that extends into the countersunk hole of the piston rod. The pressure cap is fixed in the countersunk hole of the piston mounting clearance and is connected to the inner end of the piston rod. Each cylinder is equipped with a set of cylinder movable support components. Each set of cylinder movable support components includes a guide bracket fixedly connected to the front cover and the rear cover respectively, two guide rails fixedly mounted on the guide bracket, two sliding blocks movably mounted on each guide rail, and a piston rod connector fixedly mounted on the extended end of the piston rod of the cylinder. Each sliding block is fixedly connected to the same side of the cylinder body, and the piston rod connector is fixedly mounted on the extended end of the piston rod. Each piston rod connector is fixedly connected to a corresponding mounting connecting post. The transmission mechanism includes a power output rack, a double gear, a power wedge, a transmission gear, a fixed rack, and a slider. The power output rack is fixedly mounted on the cylinder body. The double gear includes a large gear and a small gear that can rotate coaxially. The large gear of the double gear meshes with the power output rack for transmission. The power wedge has a transmission tooth on one side. The power wedge is slidably mounted in one of the four slots of the front cover by its transmission tooth meshing with the small gear of the double gear. The transmission gear is embedded and rotatably mounted in the middle of the power wedge and moves with the power wedge. The fixed rack is fixedly mounted on the rear end face of the front cover and meshes with the transmission gear, allowing the transmission gear to rotate based on the fixed rack. The slider has a transmission tooth on its rear end face. The slider is slidably mounted in the power wedge by its transmission tooth meshing with the transmission gear, and the slider is located on the front side of the power wedge. Each slider has a clamp fixedly mounted on its front end face. The ratio of the number of teeth of the large gear to the small gear in the double gear is 2:

1.

2. The full-stroke heavy-duty laser tube cutting chuck according to claim 1, characterized in that: The synchronization mechanism includes four synchronization chains, eight chain support rollers, and four roller shafts. The front and rear ends of the four roller shafts are fixedly connected to the front and rear covers, respectively. Two chain support rollers are rotatably arranged on each of the four roller shafts, one in the front and one in the back. Two synchronization chains are arranged on each of the four synchronization chains, one in the front and one in the back. The two synchronization chains on the front are fixedly connected at both ends to the cylinder bodies of two cylinders that drive the left and right grippers to move, and the two synchronization chains on the front are movably tensioned on the two chain support rollers on the front of each of the left and right ends. The two synchronization chains on the rear are fixedly connected at both ends to the cylinder bodies of two cylinders that drive the up and down grippers to move, and the two synchronization chains on the rear are movably tensioned on the two chain support rollers on the rear of each of the left and right ends.

3. The full-stroke heavy-duty laser tube cutting chuck according to claim 1 or 2, characterized in that: It also includes a displacement detection mechanism for detecting the cylinder stroke as a power source for the vertical gripper and the cylinder stroke as a power source for the horizontal gripper.

4. The full-stroke heavy-duty laser tube cutting chuck according to claim 3, characterized in that: The displacement detection mechanism includes two displacement sensors, a programmable logic controller (PLC), a wireless communication module, and a power supply module. Each displacement sensor has a transmission body and a detection rod that can extend and retract within the transmission body. The transmission bodies of both displacement sensors, the PLC, the wireless communication module, and the power supply module are all fixedly mounted on the inner end face of the front cover. The detection rod of one displacement sensor is fixedly connected to a cylinder that drives the vertical gripper movement, and the detection rod of the other displacement sensor is fixedly connected to a cylinder that drives the horizontal gripper movement. Both displacement sensors and the wireless communication module are electrically connected to the PLC, and the power supply module provides operating power to the displacement detection mechanism. In use, the displacement detection mechanism communicates wirelessly with the laser tube cutting production line control host via the wireless communication module.

5. The full-stroke heavy-duty laser tube cutting chuck according to claim 1, characterized in that: Both the front cover and the rear cover are integrally disc-shaped structural components. The middle of both the front cover and the rear cover is provided with a square clamping hole that runs through the front and rear for the workpiece to pass through during use. The clamping holes of the front cover and the rear cover together constitute the workpiece receiving hole.

6. The full-stroke heavy-duty laser tube cutting chuck according to claim 5, characterized in that: The workpiece receiving hole is provided with a detachable intermediate dust cover for a square cylindrical plate structure.

7. The full-stroke heavy-duty laser tube cutting chuck according to claim 1, characterized in that: A circular thin plate dust cover is provided between the outer periphery of the front cover and the rear cover.

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