External cylinder type laser pipe cutting chuck

Abstract

The present invention provides an externally-mounted cylinder laser pipe chuck, which includes a frame, two pairs of clamping jaws respectively arranged in the left-right direction and the up-down direction, a front cover provided with four chutes, a rotary drive mechanism fixedly arranged on the frame for driving the front cover and the clamping jaws to rotate, a cylinder with a cylinder body and a piston rod externally arranged at the rear end of the outer side of the frame, a left-right clamping jaw transmission assembly for realizing the power transmission of the piston rod of the cylinder and the two left-right clamping jaws for clamping and loosening actions, and an up-down clamping jaw transmission assembly for realizing the power transmission of the cylinder body of the cylinder and the two left-right clamping jaws for clamping and loosening actions; the left-right clamping jaw transmission assembly and the up-down clamping jaw transmission assembly each include a pull rod and two angular contact ball bearings cooperating with the pull rod. The present invention can solve the problems that the gas distribution device of the same type of chuck with an internal cylinder is complex, the internal cylinder needs to be customized or manufactured by oneself with high manufacturing cost, and the transmission problem brought about by ensuring the rotation of the clamping jaws while maintaining the clamping function of the clamping jaws when the cylinder is externally mounted.

Description

Technical Field

[0001] The present invention relates to the technical field of laser pipe cutting clamping tools, and particularly to an externally-mounted cylinder laser pipe cutting chuck. Background Art

[0002] When a chuck is used on a laser cutting machine production line, usually two chucks are used in cooperation. According to their different front and rear positions set on the production line, the two cooperating chucks are respectively called the front chuck and the tail chuck in the industry. The front chuck and the tail chuck have obvious structural differences. During the processing, the workpiece to be processed is clamped by the tail chuck and the front chuck together, with the tail chuck gradually approaching the front chuck during the processing. Currently, the common laser pipe cutting tail chuck is usually a pneumatic chuck, and the cylinder serving as the power source is usually placed inside the chuck body. The problems of such a pneumatic laser pipe cutting chuck serving as the tail chuck mainly include: First, the built-in cylinder usually needs to be customized or self-made according to the structure and assembly relationship of other components inside the chuck, and generally, commercially available standard cylinders cannot be used, thus increasing the production cost of the chuck; Second, the built-in cylinder requires a very complex air distribution device that can ensure air supply to the cylinder even when the chuck is rotating to be arranged inside the chuck body, making the processing of components related to the air distribution channel of the chuck complex, and having relatively high requirements for pressure maintenance and sealing of the air duct during use. Otherwise, the air duct is prone to air leakage during use, causing the chuck to malfunction. When using a commercially available finished cylinder as the power source outside the chuck body, to ensure that the clamping jaws can achieve the functions of clamping and loosening the workpiece to be processed while rotating, there is a problem of how to achieve the transmission between the cylinder serving as the power source outside the chuck body and the clamping jaws for clamping the workpiece to be processed. Summary of the Invention

[0003] The purpose of the present invention is: to provide an externally-mounted cylinder laser pipe cutting chuck to solve the problems existing in the built-in cylinder chuck in the prior art.

[0004] The technical solution of the present invention is: The externally-mounted cylinder laser pipe cutting chuck of the present invention includes a frame, two clamping jaws respectively arranged in the left-right direction and the up-down direction, a front cover arranged at the rear end of the above clamping jaws and having two chutes respectively arranged in the left-right direction and the up-down direction, a rotary drive mechanism fixedly arranged on the above frame for driving the above front cover and clamping jaws to rotate, and a cylinder having a cylinder body and a piston rod. Its structural feature is: It further includes a left-right clamping jaw transmission assembly and an up-down clamping jaw transmission assembly; the above cylinder is movably arranged at the rear end of the frame, the piston rod of the cylinder is transmission-connected to the two left-right clamping jaws through the above left-right clamping jaw transmission assembly, and the cylinder body of the cylinder is transmission-connected to the two up-down clamping jaws through the above up-down clamping jaw transmission assembly.

[0005] A further solution is: the piston rod is provided with a connecting flange, the cylinder body is provided with a cylinder drive plate and two or more drive plate connecting rods; the connecting flange is fixedly arranged on the outer end of the piston rod extending out of the cylinder body, and the cylinder body is fixedly connected to the cylinder drive plate through each drive plate connecting rod.

[0006] A further solution is that the cylinder body is also equipped with more than two cylinder guide rods, the front end of each cylinder guide rod is fixedly connected to the frame, and the rear end of each cylinder guide rod is movably plugged into the cylinder body in the front-rear direction.

[0007] A further solution is: the above-mentioned left and right clamping jaw transmission assembly includes a first pull rod, a pull rod connecting head fixedly arranged at the rear end of the above-mentioned first pull rod and fixedly connected to the above-mentioned connecting flange, a supporting connecting seat fixedly arranged at the front end of the first pull rod, two second angular contact ball bearings fixedly sleeved with the above-mentioned supporting connecting seat and arranged adjacent to each other in front and back, a first pushing block fixedly sleeved with the outer ends of the two second angular contact ball bearings, a first outer ring clamping cover sleeved on the rear end surface of the outer ring of the second angular contact ball bearing located on the rear side and fixedly connected to the first pushing block, a first sliding block slidably arranged in each of the two left and right sliding grooves of the front cover, and two first levers each of which is transmission connected to a first sliding block at the front end and transmission connected to the first pushing block at the rear end; the above-mentioned two left and right clamping jaws are each fixedly arranged one on the two first sliding blocks.

[0008] A further solution is: the above-mentioned up and down clamping jaw transmission assembly includes a second pull rod, a pull rod locking nut used to fix the rear end of the above-mentioned second pull rod with the above-mentioned cylinder drive plate, two third angular contact ball bearings are arranged adjacent to each other in front and back by the inner ring of which is fixedly sleeved with the front end of the second pull rod, a second push block fixedly sleeved with the outer ends of the two third angular contact ball bearings, a second outer ring clamping cover sleeved on the rear end surface of the outer ring of the third triangular contact ball bearing located on the rear side and fixedly connected to the second push block, a second slider slidably arranged in each of the two up and down sliding grooves of the front cover, and two second levers each with a front end transmission connection with a second slider and a rear end transmission connection with the second push block; the above-mentioned two up and down clamping jaws are fixedly arranged on each of the two second sliders; the first pull rod of the above-mentioned left and right clamping jaw transmission assembly can movably pass through the axial through hole provided along the axial line of the second pull rod of the up and down clamping jaw transmission assembly and the front and rear sides of the first pull rod extend to the front and rear ends of the second pull rod respectively.

[0009] A further solution is: the above-mentioned left and right clamping jaw transmission assembly also includes an inner ring clamping cover fixedly connected to the above-mentioned supporting connecting seat to lock the inner ring of the second angular contact ball bearing located on the rear side, and the above-mentioned up and down clamping jaw transmission assembly also includes an inner ring clamping nut arranged on the above-mentioned second pull rod for clamping the inner ring of the third angular contact ball bearing located on the rear side.

[0010] A further solution is: the above-mentioned frame includes a base, a front plate fixedly arranged on the upper front side of the above-mentioned base, a left plate and a right plate fixedly arranged on the upper side of the base and oppositely arranged on the left and right sides of the rear side of the front plate and both integral with the front plate or fixedly connected, and a mounting spindle fixedly arranged on the front side of the front plate; a front-to-back mounting through hole is provided in the middle of the front plate, and a front-to-back through hole is provided along the axis of the mounting spindle; the second pull rod of the above-mentioned up-and-down clamping claw transmission assembly can movably pass through the through hole of the mounting spindle of the above-mentioned frame and the mounting through hole of the front plate.

[0011] A further solution is: the above-mentioned rotation drive mechanism includes a mounting plate fixedly mounted on the front plate of the above-mentioned frame, a reducer fixedly mounted on the above-mentioned mounting plate, a driving gear transmission-connected to the above-mentioned reducer, a driven gear meshing with the above-mentioned driving gear, two first angular contact ball bearings rotatably mounted on the mounting main shaft of the frame in the front and rear directions, a first connecting sleeve whose inner side is transmission-fixedly connected to the outer rings of the two first angular contact ball bearings and whose rear end is integrally or fixedly connected to the driven gear, and a second connecting sleeve whose front and rear ends are respectively fixedly connected to the above-mentioned front cover and the front end of the first connecting sleeve; the second pushing block of the above-mentioned up and down clamping jaw transmission assembly is airtightly and movably arranged on the inner side of the second connecting sleeve of the rotation drive mechanism, and the first pushing block of the left and right clamping jaw transmission assembly is airtightly and movably arranged on the inner side of the second pushing block of the up and down clamping jaw transmission assembly.

[0012] A further solution is: the above-mentioned cylinder external laser tube cutting chuck also includes a clamp limit cover fixedly arranged on the front end of the above-mentioned front cover through a limit cover connecting rod, and the above-mentioned two left and right clamping jaws and two up and down clamping jaws can be movably extended forward from the above-mentioned clamp limit cover; the above-mentioned rotation drive mechanism also includes a gear dust cover fixedly arranged on the above-mentioned mounting plate and covering the driving gear and the driven gear, and an inner ring locking nut which cooperates with the mounting spindle of the above-mentioned frame to lock the inner ring of the first angular contact ball bearing located on the front side.

[0013] A further solution is: a middle air outlet is provided in the middle of the above-mentioned front cover, a central air hole is provided along the axis of the first pull rod which runs through in the front-to-back direction, a dust blowing air inlet nozzle is provided on the pull rod connecting head and an air duct connected to the dust blowing air inlet nozzle is provided in the pull rod connecting head, an air outlet is provided in the supporting connecting seat and an air outlet nozzle connected to the air outlet is provided at the front end of the supporting connecting seat, the first pushing block is provided with an air outlet channel ventilated to the air outlet nozzle, and the front and rear ends of the central air hole of the first pull rod are respectively ventilatedly connected to the air outlet of the supporting connecting seat and the air duct in the pull rod connecting head; thus, the dust blowing gas channel is jointly constituted by the dust blowing air inlet nozzle and the air duct in the pull rod connecting head which are arranged in sequence from back to front, the central air hole of the first pull rod, the air outlet and the air outlet nozzle of the supporting connecting seat, the air outlet channel of the first pushing block and the middle air outlet of the front cover.

[0014] The present invention has positive effects:

[0015] (1) The overall structure of the present invention is designed so that the cylinder serving as the power source can be placed outside the chuck body, and the cylinder is a commercially available part, which is simple and convenient to replace during installation and use, and has low cost. This effectively solves the problems of high chuck manufacturing cost, low working reliability and short service life caused by the existing similar chucks using customized or self-made built-in cylinders.

[0016] (2) The present invention places the cylinder outside the chuck body through the overall structural design, so that there is no need to set up a very complex gas distribution device in the chuck body as required by the existing similar chucks using built-in cylinders, which can reduce manufacturing costs and improve manufacturing efficiency.

[0017] (3) The present invention adopts a transmission structure design including two tie rods respectively connected to the cylinder body and the piston rod, and the two tie rods cooperate with a group of angular contact bearings, so that the two groups of jaws can rotate while clamping the workpiece, thereby effectively solving the transmission problem between the cylinder as a power source and the two groups of jaws when the cylinder is externally placed, which is caused by the need to ensure that the jaws can rotate while achieving the clamping function of the workpiece.

[0018] (4) Since the cylinder of the present invention is externally mounted, the clamping force of the two sets of jaws can be achieved by replacing the output force of the cylinder. The outer diameter of the existing similar tail card with an internal cylinder determines the clamping force of the two sets of jaws. Therefore, under the same clamping force, the outer diameter of the present invention is smaller. As the outer diameter of the tail card is reduced, its own manufacturing cost is reduced. At the same time, the size of the front card that cooperates with it when in use can be reduced accordingly, thereby reducing the manufacturing cost of the front card. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 for Figure 1 Left view of

[0021] Figure 3 for Figure 2 AA section view;

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

[0023] Figure 5 for Figure 4 Schematic diagram of the longitudinal section structure through the axis centerline;

[0024] Figure 6 For Figure 4 Schematic diagram of the three-dimensional structure of the present invention at different viewing angles;

[0025] Figure 7 To removeFigure 6 Schematic three-dimensional structure diagram of the present invention after the limit cover and the limit cover mounting post in

[0026] The reference numerals in the above-mentioned drawings are as follows:

[0027] Frame 1, base 11, front plate 12, left plate 13, right plate 14, mounting main shaft 15;

[0028] Rotary drive mechanism 2, mounting plate 21, reduction gear 22, driving gear 23, driven gear 24, first angular contact ball bearing 25, inner ring locking nut 25-1, first connecting sleeve 26, second connecting sleeve 27, gear dust cover 28;

[0029] Front cover 3, middle air outlet 31;

[0030] Jaw 4, left-right jaw 41, up-down jaw 42;

[0031] Cylinder 5, cylinder block 51, piston rod 52, connecting flange 53, cylinder block drive plate 54, drive plate connecting rod 55, cylinder block guide rod 56;

[0032] Left-right jaw transmission assembly 6, first pull rod 61, central ventilation hole 61-1, pull rod connection head 62, dust blowing air inlet nozzle 62-1, support connection seat 63, air outlet hole 63-1, air outlet nozzle 63-2, second angular contact ball bearing 64, inner ring pressing cover 65, first outer ring pressing cover 66, first push block 67, air outlet channel 67-1, first lever 68, first slider 69;

[0033] Up-down jaw transmission assembly 7, second pull rod 71, pull rod locking nut 72, third angular contact ball bearing 73, inner ring pressing nut 74, second outer ring pressing cover 75, second push block 76, second lever 77, second slider 78;

[0034] Part limit cover 8, limit cover connecting rod 81. Specific embodiments

[0035] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0036] (Embodiment 1)

[0037] In this embodiment, when describing the orientation, the direction facing Figure 1 is the front in the description, and the direction facing away from Figure 1 is the rear in the description, Figure 1 The up-down and left-right directions in

[0038] are still the up-down and left-right directions in the description. Figures 1 to 7, the cylinder-external laser pipe cutting chuck of this embodiment mainly consists of a frame 1, a rotary drive mechanism 2, a front cover 3, clamping jaws 4, a cylinder 5, a left-right clamping jaw transmission assembly 6, an up-down clamping jaw transmission assembly 7, and a clamping part limit cover 8.

[0039] The frame 1 serves as the installation foundation of the cylinder-external laser pipe cutting chuck of this embodiment. As a specific implementation, in this embodiment, the frame 1 includes a base 11, a front plate 12 fixedly arranged above the front side of the base 11, a left plate 13 and a right plate 14 fixedly arranged above the base 11 and relatively arranged left and right at the rear side of the front plate 12 and both integrally or fixedly connected to the front plate 12, and an installation main shaft 15 fixedly arranged on the front side of the front plate 12. There is a front-back installation through hole in the middle of the front plate 12, and the installation main shaft 15 is provided with a front-back through hole along its axis.

[0040] The rotary drive mechanism 2 includes a mounting plate 21, a reduction gear 22, a driving gear 23, a driven gear 24, a first angular contact ball bearing 25, a first connecting sleeve 26, a second connecting sleeve 27, and a gear dust cover 28. The mounting plate 21 serves as the installation foundation of the rotary drive mechanism 2. The mounting plate 21 can be one of the components of the rotary drive mechanism 2, or one of the components of the frame 1 integrally or fixedly connected to the front plate 12 of the frame 1. The reduction gear 22, the driving gear 23, the driven gear 24, and the first angular contact ball bearing 25 are all commercially available parts. The reduction gear 22 is fixedly arranged on the mounting plate 21. The driving gear 23 is in transmission connection with the reduction gear 22, and the driven gear 24 is in meshing transmission connection with the driving gear 23. Two first angular contact ball bearings 25 are rotatably sleeved on the installation main shaft 15 of the frame 1 in the front-back direction. The inner side of the first connecting sleeve 26 is fixedly connected to the outer rings of the two first angular contact ball bearings 25 in a transmission manner. The rear end of the first connecting sleeve 26 is integrally or fixedly connected to the driven gear 24, and the front end of the first connecting sleeve 26 is fixedly connected to the rear end of the second connecting sleeve 27. Preferably, the inner ring of the first angular contact ball bearing 25 located at the front side is locked by an inner ring locking nut 25-1 arranged on the installation main shaft 15 to prevent its movement during use. The gear dust cover 28 is provided as a preferred method. The gear dust cover 28 is fixedly arranged on the mounting plate 21 and covers the driving gear 23 and the driven gear 24. During use, the rotary drive mechanism 2 is in transmission connection with a motor (not shown in the figure) configured as a rotary power source on the laser cutting machine production line by its reduction gear 22.

[0041] The front cover 3 is a structural member with an overall round cake shape. There are a total of four chutes on the front cover 3, two in the up-down direction and two in the left-right direction. The front cover 3 is fixedly connected to the front end of the second connecting sleeve 27.

[0042] The jaw 4 includes two left - right jaws 41 and two up - down jaws 42; the specific structure of the jaw 4 is prior art and will not be elaborated. During use, the two left - right jaws 41 and the two up - down jaws 42 respectively clamp or release the workpiece synchronously from the left - right direction and the up - down direction.

[0043] The cylinder 5 is a commercially available component. The cylinder 5 includes a cylinder block 51 and a piston rod 52; to cooperate with the external design of the cylinder 5 with the chuck of this embodiment as the power source, a connecting flange 53 is provided on the piston rod 52 of the cylinder 5. The connecting flange 53 is fixedly arranged at the outer end of the piston rod 52 extending out of the cylinder block 51. The cylinder block 51 is provided with a cylinder - block driving plate 54 and more than two driving - plate connecting rods 55. The cylinder - block driving plate 54 is a rectangular plate - like component. A mounting through - hole penetrating from front to back is provided in the middle of the cylinder - block driving plate 54. The cylinder block 51 is fixedly connected to the cylinder - block driving plate 54 through the driving - plate connecting rods 55. Preferably, the cylinder block 51 is also provided with more than two cylinder - block guide rods 56. The front ends of the cylinder - block guide rods 56 are fixedly connected to the left plate 13 and the right plate 14 of the frame 1 respectively, and the rear ends of the cylinder - block guide rods 56 are movably inserted into the cylinder block in the front - back direction. By providing the cylinder - block guide rods 56, the cylinder block 51 can move more smoothly in the front - back direction during operation.

[0044] The left - right jaw transmission assembly 6 is used to realize the power transmission between the piston rod 52 of the cylinder 5 and the two left - right jaws 41 for clamping and releasing actions. As a specific implementation manner, the left - right jaw transmission assembly 6 includes a first pull rod 61, a pull - rod connection head 62, a support connection seat 63, a second angular contact ball bearing 64, an inner - ring pressing cover 65, a first outer - ring pressing cover 66, a first push block 67, a first lever 68, and a first slider 69.

[0045] The first tie rod 61 is a structural member that is in the shape of a hollow round rod as a whole. The tie rod connector 62 is fixedly arranged at the rear end of the first tie rod 61. The support connector 63 is fixedly connected to the front end of the first tie rod 61 by threaded cooperation. Two second angular contact ball bearings 64 are arranged adjacent to each other in front and back, with their inner rings fixedly sleeved on the outer periphery of the support connector 63. The inner ring clamping cover 65 is preferably arranged. The inner ring clamping cover 65 is sleeved on the front end of the first tie rod 61 and fixedly connected to the support connector 63, thereby locking the inner ring of the second angular contact ball bearing 64 located on the rear side to prevent it from moving backward during use. The first outer ring clamping cover 66 is sleeved on the rear end surface of the outer ring of the second angular contact ball bearing 64 located on the rear side and is fixedly connected to the first push block 67. The first push block 67 is fixedly sleeved on the outer end surfaces of the outer rings of the two second angular contact ball bearings 64 to realize the front-to-back transmission between the two second angular contact ball bearings 64 and the first push block 67, and the first push block 67 can rotate relying on the outer rings of the two second angular contact ball bearings 64; there are two first levers 68 and two first sliders 69 respectively, and the two first sliders 69 are slidably arranged one each in the two left and right sliding grooves of the front cover 3; the two first levers 68 are respectively connected to a first slider 69 by their front ends, and the rear ends of the two first levers 68 are connected to the first push block 67 by their rear ends.

[0046] The left and right clamp transmission assembly 6 is fixedly connected to the connecting flange 53 fixedly arranged on the piston rod 52 of the cylinder 5 by its pull rod connector 62, and the two first sliders 69 are respectively fixedly connected to the two left and right clamps 41, thereby realizing the transmission connection between the piston rod 52 of the cylinder 5 and the two left and right clamps 41.

[0047] As a preferred embodiment, the cylinder external laser tube cutting chuck of this embodiment is also provided with a dust blowing gas channel for preventing dust generated during processing from entering the interior of the chuck from the front end. Accordingly, a middle air outlet 31 is provided in the middle of the front cover 3; the first pull rod 61 is provided with a central air vent 61-1 that passes through in the front-to-back direction along its axis; an air duct is provided in the pull rod connector 62, and a dust blowing air inlet nozzle 62-1 that communicates with its air duct is provided on the pull rod connector 62; an air outlet 63-1 is provided in the support connection seat 63, and an air outlet nozzle 63-2 that communicates with the air outlet 63-1 is provided at the front end of the support connection seat 63, and the first push block 67 is provided with an air outlet channel 67-1 that communicates with the air outlet nozzle 63-2, and the front and rear ends of the central air vent 61-1 of the first pull rod 61 are respectively connected to the air outlet 63-1 of the support connection seat 63 and the air duct in the pull rod connector 62.

[0048] The dust blowing gas channel is thus formed by the dust blowing air inlet nozzle 62-1 and the air duct in the pull rod connector 62, the central air vent 61-1 of the first pull rod 61, the air outlet hole 63-1 of the supporting connecting seat 63, the air outlet nozzle 63-2, the air outlet channel 67-1 of the first push block 67 and the middle air outlet hole 31 of the front cover 3, which are arranged in sequence from back to front.

[0049] The up-down clamping jaw transmission assembly 7 is used to realize the power transmission of the cylinder body 51 of the cylinder 5 and the two up-down clamping jaws 42 for clamping and loosening. As a specific implementation mode, the up-down clamping jaw transmission assembly 7 includes a second pull rod 71, a pull rod locking nut 72, a third angular contact ball bearing 73, an inner ring clamping nut 74, a second outer ring clamping cover 75, a second push block 76, a second lever 77 and a second slider 78.

[0050] The second tie rod 71 is an integral round rod-shaped structural member with an axial through hole along the axial line. The inner diameter of the second tie rod 71 is larger than the outer diameter of the first tie rod 61. The second tie rod 71 can movably pass through the through hole axially arranged on the mounting spindle 15 of the aforementioned frame 1 and the mounting through hole in the middle of the front plate 12. The rear end of the second tie rod 71 cooperates with the rear end surface of the cylinder drive plate 54 equipped with the cylinder body 51 of the cylinder 5 through the tie rod locking nut 72 to fix the rear end of the second tie rod 71 with the cylinder drive plate 54; the third angular contact ball bearing 73 is respectively fixedly sleeved with the outer periphery of the front end of the second tie rod 71 by its inner ring, and two are adjacent to each other in front and back. The inner ring clamping nut 74 is preferably arranged, and the inner ring clamping nut 74 is threadedly arranged on the second tie rod 71 for fixing the third angular contact ball bearing 73 located on the rear side. 3 is pressed to prevent it from moving during operation; the second outer ring pressing cover 75 is sleeved on the rear end surface of the outer ring of the third angular contact ball bearing 73 located on the rear side and is fixedly connected to the second push block 76, and the second push block 76 is fixedly sleeved with the outer end surfaces of the outer rings of the two third angular contact ball bearings 73 to realize the front and rear transmission between the two third angular contact ball bearings 73 and the second push block 76, and the second push block 76 can rotate relying on the outer rings of the two third angular contact ball bearings 73; two second levers 77 and second sliders 78 are respectively provided, and the two second sliders 78 are slidably arranged one each in the two up and down sliding grooves of the front cover 3; the two second levers 77 are respectively connected to a second slider 78 by their front ends, and the rear ends of the two second levers 77 are connected to the second push block 76 by their rear ends.

[0051] Thus, the transmission connection between the cylinder body 51 of the cylinder 5 and the two upper and lower clamping jaws 42 is realized by the drive plate connecting rod 55, the cylinder body drive plate 54, the second pull rod 71 and the pull rod locking nut 72, the third angular contact ball bearing 73, the second push block 76, the second lever 77 and the second slider 78.

[0052] The second push block 76 of the up-and-down jaw drive assembly 7 is hermetically movably arranged inside the second connecting sleeve 27 of the rotary drive mechanism 2, and the first push block 67 of the left-and-right jaw drive assembly 6 is hermetically movably arranged inside the second push block 76 of the up-and-down jaw drive assembly 7; the first pull rod 61 of the left-and-right jaw drive assembly 6 movably passes through the axial through hole of the second pull rod 71 of the up-and-down jaw drive assembly 7, and both the front and rear sides of the first pull rod 61 extend towards the front and rear ends of the second pull rod 71 respectively.

[0053] The clamp part limit cover 8 is arranged as a preferred mode. The clamp part limit cover 8 is fixedly arranged at the front end of the front cover 3 through a plurality of limit cover connecting rods 81 arranged. The purpose of arranging the clamp part limit cover 8 is to prevent the workpiece to be processed from colliding with the front cover 3 and related components during use, and to shorten the tail-end waste of the workpiece to be processed so as to avoid waste. The two left-and-right jaws 41 and the two up-and-down jaws 42 can all movably extend forward from the clamp part limit cover 8.

[0054] The aforementioned external cylinder 5 can be replaced by a linear drive mechanism such as an electric push rod or a hydraulic cylinder, and each angular contact ball bearing can be replaced by a thrust bearing. The specific structure will not be elaborated, but both types of replacements are equivalent replacements for the corresponding components in this embodiment.

[0055] The working principle and process of the cylinder-external laser pipe cutting chuck in this embodiment are briefly described as follows:

[0056] When the cylinder 5 intakes air, the piston rod 52 of the cylinder 5 extends forward. The connecting flange 53 arranged on the piston rod 52 drives through the left-and-right jaw drive assembly 6, so that the two left-and-right jaws 41 move centripetally from the open state to clamp the workpiece to be processed. At the same time, the cylinder block 51 of the cylinder 5 moves backward. Through the drive plate connecting rod 55, the cylinder block drive plate 54 and the up-and-down jaw drive assembly 7, the two front-and-rear jaws 42 synchronously move centripetally from the open state to clamp the workpiece to be processed; among them, the action process of the left-and-right jaw drive assembly 6 is: the pull rod connection head 62 fixedly connected to the connecting flange 53 transmits the forward thrust of the piston rod 52 successively through the first pull rod 61, the support connecting seat 63, the two second angular contact ball bearings 64, the first push block 67, the two first levers 68 and the two first sliders 69, so that the two left-and-right jaws 41 make centripetal clamping actions; the action process of the up-and-down jaw drive assembly 7 is: the second pull rod 71 locked at the rear end on the cylinder block drive plate 54 by the pull rod locking nut 72 transmits the backward pull of the cylinder block 51 successively through the two third angular contact ball bearings 73, the second push block 76, the two second levers 77 and the two second sliders 78, so that the two up-and-down jaws 42 make centripetal clamping actions. When the cylinder 5 exhausts air, it makes the opposite actions to the above, and the two left-and-right jaws 41 and the two up-and-down jaws 42 make reset movements, which will not be elaborated specifically.

[0057] When the two groups of clamps 4 are clamping the workpiece for processing, if the workpiece needs to be rotated, the motor as a rotation power source provided on the laser cutting machine production line is turned on, and the first connecting sleeve 26 is driven by the reducer 22, the driving gear 23, and the driven gear 24 of the rotary drive mechanism 2 to rotate the first connecting sleeve 26 relying on the two first angular contact ball bearings 25, driving the second connecting sleeve 27 connected to the first connecting sleeve 26 to rotate synchronously, and the rotation of the second connecting sleeve 27 drives the front cover 3 connected thereto to rotate, and the rotation of the front cover 3 causes the two first sliders 69 provided in the slide groove of the front cover 3 and the sliders 69 fixed thereto to rotate. The two left and right clamping jaws 41 on the two first sliders 69 and the two second sliders 78 and the two up and down clamping jaws 42 fixed on the two second sliders 78 rotate synchronously with the front cover 3, and the follow-up rotation of the two first sliders 69 and the two second sliders 78 is transmitted by the two first levers 68 and the second levers 77, respectively, so that the first push block 67 and the second push block 76 respectively rely on the outer rings of the two second angular contact ball bearings 64 and the two third angular contact ball bearings 73 to rotate synchronously, so that when each clamping jaw 4 rotates, it does not interfere with the action of clamping the workpiece.

[0058] As can be seen from the foregoing, the cylinder external laser tube cutting chuck of this embodiment is designed with an overall structure so that the cylinder 5 as a power source can be placed outside the chuck body, and the cylinder 5 is a commercially available part, thereby effectively solving the problem of raising the production cost of the chuck caused by the use of customized or homemade built-in cylinders in existing similar chucks; and there is no need for a very complex gas distribution device as required by existing similar chucks using built-in cylinders; and through a transmission structure design including two pull rods respectively connected to the cylinder body and the piston rod, and the two pull rods cooperating with a group of angular contact bearings, the two sets of jaws can rotate while clamping the workpiece, thereby effectively solving the transmission problem between the cylinder and the two sets of jaws in the prior art that when the cylinder is external, the rotation of the clamping jaws must be ensured while the clamping function of the workpiece is realized.

[0059] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. An externally-mounted cylinder laser pipe cutting chuck, comprising a frame, clamping jaws provided in two each in the left-right direction and the up-down direction, a front cover provided at the rear ends of the clamping jaws and having two chutes each in the left-right direction and the up-down direction, a rotary drive mechanism fixedly provided on the frame for driving the front cover and the clamping jaws to rotate, and a cylinder having a cylinder body and a piston rod. Characterized in that: It further includes a left-right clamping jaw transmission assembly and an up-down clamping jaw transmission assembly; the cylinder is movably provided at the rear end of the frame, the piston rod of the cylinder is drivingly connected to the two left-right clamping jaws through the left-right clamping jaw transmission assembly, and the cylinder body of the cylinder is drivingly connected to the two up-down clamping jaws through the up-down clamping jaw transmission assembly; The piston rod is provided with a connecting flange, and the cylinder body is provided with a cylinder body drive plate and more than two drive plate connecting rods; the connecting flange is fixedly provided at the outer end of the piston rod extending out of the cylinder body, and the cylinder body is fixedly connected to the cylinder body drive plate through each drive plate connecting rod; The left-right clamping jaw transmission assembly includes a first pull rod, a pull rod connection head fixedly provided at the rear end of the first pull rod and fixedly connected to the connecting flange, a support connection seat fixedly provided at the front end of the first pull rod, two second angular contact ball bearings fixedly sleeved on the support connection seat and arranged adjacent to each other front and back, a first push block fixedly sleeved on the outer ends of the two second angular contact ball bearings, a first outer ring pressing cover sleeved on the rear end face of the outer ring of the second angular contact ball bearing located at the rear side and fixedly connected to the first push block, a first slider slidably provided in each of the two left-right chutes of the front cover, and two first levers each having a front end drivingly connected to a first slider and a rear end drivingly connected to the first push block; one of the two left-right clamping jaws is fixedly provided on each of the two first sliders; The up-down clamping jaw transmission assembly includes a second pull rod, a pull rod locking nut for fixedly connecting the rear end of the second pull rod to the cylinder body drive plate, two third angular contact ball bearings fixedly sleeved on the front end of the second pull rod with their inner rings respectively and arranged adjacent to each other front and back, a second push block fixedly sleeved on the outer ends of the two third angular contact ball bearings, a second outer ring pressing cover sleeved on the rear end face of the outer ring of the third angular contact ball bearing located at the rear side and fixedly connected to the second push block, a second slider slidably provided in each of the two up-down chutes of the front cover, and two second levers each having a front end drivingly connected to a second slider and a rear end drivingly connected to the second push block; one of the two up-down clamping jaws is fixedly provided on each of the two second sliders; the first pull rod of the left-right clamping jaw transmission assembly movably passes through an axial through hole provided along the axis of the second pull rod of the up-down clamping jaw transmission assembly and the front and rear sides of the first pull rod respectively extend towards the front and rear ends of the second pull rod.

2. The externally-mounted cylinder laser pipe cutting chuck according to claim 1, Characterized in that: The cylinder body is further provided with more than two cylinder body guide rods, the front ends of the cylinder body guide rods are fixedly connected to the frame, and the rear ends of the cylinder body guide rods are movably inserted into the cylinder body in the front-rear direction.

3. The externally-mounted cylinder laser pipe cutting chuck according to claim 1, Characterized in that: The left-right clamp transmission assembly also includes an inner ring clamping cover fixedly connected to the support connecting seat for locking the inner ring of the second angular contact ball bearing located on the rear side, and the up-down clamp transmission assembly also includes an inner ring clamping nut arranged on the second pull rod for clamping the inner ring of the third angular contact ball bearing located on the rear side.

4. The cylinder external laser tube cutting chuck according to claim 1, Features: The frame includes a base, a front plate fixedly arranged above the front side of the base, a left plate and a right plate fixedly arranged above the base and oppositely arranged on the left and right sides of the rear side of the front plate and both integral with the front plate or fixedly connected, and a mounting spindle fixedly arranged on the front side of the front plate; a front-to-back mounting through hole is provided in the middle of the front plate, and a front-to-back through hole is provided along the axis of the mounting spindle; the second pull rod of the up-and-down clamp transmission assembly can movably pass through the through hole of the mounting spindle of the frame and the mounting through hole of the front plate.

5. The cylinder external laser tube cutting chuck according to claim 4, Features: The rotary drive mechanism includes a mounting plate fixedly mounted on the front plate of the frame, a reducer fixedly mounted on the mounting plate, a driving gear transmission-connected to the reducer, a driven gear meshing with the driving gear, two first angular contact ball bearings rotatably mounted front and rear on the mounting main shaft of the frame, a first connecting sleeve whose inner side is transmission-fixedly connected to the outer rings of the two first angular contact ball bearings and whose rear end is integrally or fixedly connected to the driven gear, and a second connecting sleeve whose front and rear ends are respectively fixedly connected to the front cover and the front end of the first connecting sleeve; the second push block of the up-and-down clamping jaw transmission assembly is airtightly and movably arranged on the inner side of the second connecting sleeve, and the first push block of the left-and-right clamping jaw transmission assembly is airtightly and movably arranged on the inner side of the second push block of the up-and-down clamping jaw transmission assembly.

6. The cylinder external laser tube cutting chuck according to claim 5, Features: It also includes a clamp limit cover fixed to the front end of the front cover by a limit cover connecting rod, and the two left and right clamping jaws and the two up and down clamping jaws can be movably extended forward from the clamp limit cover; the rotation drive mechanism also includes a gear dust cover fixed to the mounting plate and covering the driving gear and the driven gear, and an inner ring locking nut that cooperates with the mounting spindle of the frame to lock the inner ring of the first angular contact ball bearing located on the front side.

7. The cylinder external laser tube cutting chuck according to any one of claims 1 or 3 to 6, Features: A middle air outlet hole is provided at the middle of the front cover. The first pull rod is provided with a central ventilation hole that penetrates through from front to back along its axis. A dust blowing air inlet nozzle is provided on the pull rod connector, and a ventilation channel communicating with the dust blowing air inlet nozzle is provided inside the pull rod connector. An air outlet hole is provided inside the support connecting seat, and an air outlet nozzle communicating with the air outlet hole is provided at the front end of the support connecting seat. The first push block is provided with an air outlet channel communicating with the air outlet nozzle. The front and rear ends of the central ventilation hole of the first pull rod are respectively in ventilation connection with the air outlet hole of the support connecting seat and the ventilation channel inside the pull rod connector; thus, a dust blowing gas channel is jointly formed by the dust blowing air inlet nozzle and the ventilation channel inside the pull rod connector, the central ventilation hole of the first pull rod, the air outlet hole and the air outlet nozzle of the support connecting seat, the air outlet channel of the first push block, and the middle air outlet hole of the front cover, which are arranged in sequence from back to front.

Images