CN216882291U - Chuck for laser pipe cutting machine - Google Patents

Abstract

The utility model provides a chuck for a laser pipe cutting machine, which comprises a base disc, 2 groups of 4 clamping jaws, 2 groups of 4 sets of driving devices arranged at the rear end of the base disc and used for driving the 2 groups of clamping jaws to move, 2 sets of gear-rack type synchronizing mechanisms respectively used for rigidly constraining the movement synchronism of the 2 sets of driving devices in the same group in the 2 groups of driving devices, wherein each synchronizing mechanism comprises 2 synchronous driving racks respectively fixedly connected with the 2 sets of driving devices in the same group, 2 synchronizing gears which are rotatably arranged on the base disc and respectively meshed with the 2 synchronous driving racks correspondingly, and a synchronizing connecting piece of which two ends are respectively meshed with the 2 synchronizing gears. This chuck carries out rigidity restraint to 2 sets of drive arrangement's in 2 groups motion synchronism respectively through setting up 2 sets of lazytongs, can make 2 clamping jaws from top to bottom and control to 2 clamping jaws realize accurate synchronization in doing the motion process of pressing from both sides tightly and unclamping the pipe fitting that is processed, and its during operation is level and smooth not have the interference, reliable operation.

Description

Chuck for laser pipe cutting machine

Technical Field

The utility model relates to the technical field of tools and instruments matched with a laser pipe cutting machine, in particular to a chuck for the laser pipe cutting machine.

Background

The chuck is an auxiliary tool necessary for the laser pipe cutting machine to cut and process pipes, and is used for clamping and fixing the pipes during processing. The existing chuck generally adopts a cylinder as power, two groups of clamping jaws which are arranged on a base plate (commonly called a front cover in the industry) as an installation foundation are driven by a transmission mechanism to move so as to clamp a processed pipe fitting, one group of the 2 groups of clamping jaws is 2 clamping jaws moving up and down, the other group is 2 clamping jaws moving left and right, the synchronous precision of the respective synchronous clamping of the pipe fitting has important influence on the precision of the laser cutting processing pipe fitting in the pipe clamping process of the 2 groups of clamping jaws, and the higher the synchronous precision of the two groups of clamping jaws is, the better the synchronous precision is. For this reason, in recent years, chucks are generally provided with a synchronization mechanism for moving two sets of jaws to improve synchronization of clamping a pipe by the two sets of jaws, and conventional chuck jaw synchronization mechanisms generally adopt a link-type structure, and chinese patent documents having publication numbers CN101439454A and entitled "link-type chuck for laser pipe cutting machine" and publication numbers CN106984842B and entitled "light pipe cutting chuck" respectively disclose chucks that utilize 2-link and 4-link synchronization mechanisms to improve synchronization of clamping jaws to clamp a pipe. The effect of the synchronization mechanism of the 2 connecting rod or the 4 connecting rod for improving the synchronization precision of the pipe clamp is limited, and the synchronization precision is seriously influenced by a gap generated by abrasion and looseness of the connecting pin in the use process; chain formula lazytongs has also appeared on the market at present, and it has the problem that synchronous precision needs to improve equally, easily produces the jam phenomenon in the use in addition.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: in order to improve the tube clamping synchronization precision of 2 groups of clamping jaws of the existing chuck, the chuck for the laser tube cutting machine is provided, which realizes 2 groups of clamping jaws to be synchronous by utilizing a gear rack, and has high synchronization precision and smooth and reliable operation in the use process.

In order to realize the purpose of the utility model, the utility model adopts the technical scheme that: the utility model provides a chuck for laser pipe cutting machine, includes as the basal disc of installation basis, can be respectively about and to locating 4 clamping jaws altogether of 2 groups of basal disc front end with moving about to, locate that the basal disc rear end is used for dividing into of the motion of 4 corresponding drive clamping jaws about to and about to 2 groups and every each 2 drive arrangement of group, the centre department of above-mentioned basal disc is equipped with the pipe fitting clearing hole, is equipped with about on the basal disc to and each 2 spouts of about to, its structural feature is: the synchronous mechanism comprises 2 sets of gear-rack type synchronous mechanisms, wherein the 2 sets of gear-rack type synchronous mechanisms are respectively used for carrying out rigid constraint on the motion synchronism of the 2 sets of driving devices in the same group in the 2 sets of driving devices, the synchronous mechanisms comprise 2 synchronous driving racks respectively fixedly connected with the 2 sets of driving devices in the same group, 2 synchronous gears which are rotatably arranged on the base plate and respectively correspondingly meshed with the 2 synchronous driving racks, and synchronous connecting pieces, two ends of each synchronous connecting piece are respectively meshed with the 2 synchronous gears. This chuck is through setting up 2 sets of lazytongs, and wherein 1 set of lazytongs carries out the rigidity restraint through the motion synchronism to 2 sets of drive arrangement that the drive moved to 2 clamping jaws from top to bottom, and 1 set of lazytongs carries out the rigidity restraint through the motion synchronism to 2 sets of drive arrangement that the drive moved to 2 clamping jaws from left to right in addition to can make 2 clamping jaws from top to bottom and 2 clamping jaws from left to right realize accurate synchronization in doing the motion process that presss from both sides tightly and unclamp the processed pipe fitting.

The further scheme is as follows: the synchronous connecting piece of the synchronous mechanism comprises a connecting plate, a first rack and a second rack which are respectively and fixedly connected with the two ends of the connecting plate; the synchronous gears are special-shaped gears which are integrally formed by a gear shaft, a driving tooth part and a driven tooth part which are respectively arranged at the outer sides of the front end and the rear end of the gear shaft, 2 synchronous gears are respectively meshed with the 2 synchronous driving racks by the driving tooth part, and 2 synchronous gears are respectively meshed with the first rack and the second rack of the synchronous connecting piece by the driven tooth part.

The further scheme is as follows: the chuck also comprises a connecting seat fixedly arranged in the middle of the rear end surface of the base plate, the connecting seat is a hollow structural member with openings at the front end and the rear end, and the hollow part of the connecting seat is communicated with the pipe fitting through hole of the base plate; preferably, the synchronous connecting member of the synchronous mechanism further includes a synchronous slide rail fixedly disposed on the connecting seat, and a synchronous slider fixedly disposed on the connecting plate and slidably engaged with the synchronous slide rail. The synchronous sliding rail and the synchronous sliding block play a guiding and supporting role, so that the meshing of the first rack and the second rack with the 2 synchronous gears is more accurate, and the synchronous precision is further improved.

The further scheme is as follows: the pipe fitting through hole of the base plate is a square hole; the end surfaces of the front opening and the rear opening of the connecting seat are square.

The further scheme is as follows: the driving device comprises an air cylinder fixedly arranged on a base plate, 1 drive plate slide rail, a drive plate slide block, a drive plate, a piston rod connecting piece, a transmission bearing, a transmission slide block and a transmission shaft, wherein the drive plate slide rails are fixedly arranged on the base plate, are respectively and fixedly arranged at two sides of the air cylinder, are positioned on the base plate, are respectively provided with 1 drive counter bore, are slidably arranged on the drive plate slide rails, the rear end surface of the drive plate slide block is fixedly connected with the drive plate slide block, the front end surface of the drive plate slide block is obliquely provided with a drive counter bore, the front end and the rear end of the piston rod connecting piece are respectively and fixedly connected with a piston rod arranged on the drive plate and the air cylinder, the transmission bearing is rotatably arranged in the drive counter bore of the drive plate, the transmission slide block is movably arranged in a chute of the base plate and is fixed with 1 clamping jaw, and the transmission shaft is sleeved with the transmission bearing at the rear end and is fixedly connected with the transmission slide block at the front end; the piston rods of the respective cylinders of the 2 sets of driving devices in the same group are installed in opposite directions; 2 synchronous driving racks of the synchronous mechanism are fixedly arranged on the driving plates of 2 sets of driving devices in the same group respectively by 1. The driving device adopts the structural design, can stably run without interference when in work, and has quick driving response and high efficiency.

The utility model has the positive effects that: (1) according to the chuck for the laser pipe cutting machine, through the structural design of the synchronizing mechanism and the matching design between the synchronizing mechanism and the driving device, the movement synchronism of 2 sets of driving devices of the same group 1 is rigidly restrained by using 1 set of synchronizing mechanism respectively, so that the accurate synchronization can be realized in the process that 2 sets of clamping jaws respectively driven by 2 sets of driving devices move oppositely to clamp a pipe fitting and move oppositely to loosen the pipe fitting. (2) Compared with the prior art, the chuck for the laser pipe cutting machine has the advantages that the chuck for the laser pipe cutting machine is stable in operation without interference in the working process, the driving response is fast, the efficiency is high, and the working reliability is good through respective structural design of the synchronizing mechanism and the driving device.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic plan view of the structure as viewed from the rear right of fig. 1;

FIG. 3 is a schematic perspective view of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 2 with 4 cylinders removed;

FIG. 5 is a schematic perspective view of FIG. 4;

FIG. 6 is a schematic perspective view of a transmission slide block, a transmission shaft and a transmission bearing of the driving device in FIG. 1;

FIG. 7 is a schematic plan view of a drive plate of the drive of FIG. 2, as viewed from the rear end;

FIG. 8 is a rear view of FIG. 7;

FIG. 9 is a perspective view of the driving plate;

FIG. 10 is a schematic perspective view of a synchronizing gear of the synchronizing mechanism of FIG. 2;

fig. 11 is a schematic perspective view of a synchronizing link of the synchronizing mechanism of fig. 2.

The reference numbers in the above figures are as follows:

the base plate 1, the pipe fitting through hole 11 and the chute 12; a clamping jaw 2; a connecting seat 3;

the device comprises a driving device 4, an air cylinder 41, an air cylinder mounting column 41-1, a driving plate slide rail 42, a driving plate slide block 43, a driving plate 44, a first slide block connecting part 44-1, a second slide block connecting part 44-2, an air cylinder power connecting part 44-3, a synchronous driving rack connecting part 44-4 and a driving counter bore 44-5; a piston rod connecting piece 45, a transmission slide block 46, a transmission shaft 47 and a transmission bearing 48;

the synchronous mechanism 5, a synchronous driving rack 51, a synchronous gear 52, a gear shaft 52-1, a driving tooth part 52-2, a driven tooth part 52-3, a synchronous connecting piece 53, a connecting plate 53-1, a first rack 53-2, a second rack 53-3, a synchronous sliding rail 53-4 and a synchronous sliding block 53-5.

Detailed Description

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

(example 1)

In the present embodiment, in the description of the orientation, the direction in which fig. 1 faces is taken as the front in the description, the direction opposite to the direction in fig. 1 is taken as the rear in the description, and the up-down and left-right directions in fig. 1 are still the up-down and left-right directions in the description.

Referring to fig. 1 to 5, the chuck for a laser pipe cutting machine according to the present embodiment mainly includes a base plate 1 serving as an installation base, 2 sets of clamping jaws 2 movably disposed at the front end of the base plate 1 in the up-down direction and the left-right direction, a connecting seat 3 fixedly disposed at the middle of the rear end surface of the base plate 1, 4 sets of driving devices 4 disposed at the rear end of the base plate 1 for driving the 2 sets of clamping jaws 2 to move, and 2 sets of gear-rack type synchronizing mechanisms 5 disposed at the rear end of the base plate 1 for realizing respective synchronizing movement of the 2 sets of clamping jaws 2.

The base plate 1 is the structure that wholly is the cake form, and the centre department of base plate 1 is equipped with the pipe fitting clearing hole 11 that is used for being passed through by the centre gripping pipe fitting when using, and the pipe fitting clearing hole 11 of base plate 1 can be the square hole, also can be the round hole, and in this embodiment, the pipe fitting clearing hole 11 of base plate 1 is the square hole. The base plate 1 is provided with 4 sliding grooves 12, wherein 2 sliding grooves 12 are arranged up and down, and the other 2 sliding grooves 12 are arranged left and right, as shown in fig. 1. The structure of the base plate 1 is prior art and will not be described in detail.

The clamping jaws 2 are respectively provided with 2 groups in the vertical direction and the left-right direction. Each group is provided with 2 clamping jaws 2, and the 2 clamping jaws 2 in the same group are oppositely arranged. The structure and arrangement of the clamping jaw 2 are prior art and will not be described in detail.

The connecting socket 3 is used for installation connection. The connecting seat 3 is a hollow structural member with openings at the front end and the rear end, is adapted to the pipe fitting through hole 11 of the base plate 1 and is provided with a square hole, and the end surfaces of the openings at the front end and the rear end of the connecting seat 3 are also square; the connecting seat 3 is fixedly arranged on the rear end surface of the base plate 1, and the hollow part of the connecting seat 3 is communicated with the pipe fitting through hole 11 in the middle of the base plate 1.

4 sets of driving devices 4 with the same structure are arranged on the upper part, the lower part, the left part and the right part of the rear end surface of the base plate 1, and each set of driving device 4 drives 1 clamping jaw 2 to move. The four sets of driving devices 4 are correspondingly divided into 2 sets of driving devices 4 in the up-down direction and two sets of driving devices 4 in the left-right direction as one set, and the two sets of driving devices 4 in the left-right direction are the other set.

The driving device 4 mainly comprises a cylinder 41, a driving plate slide rail 42, a driving plate slider 43, a driving plate 44, a piston rod connecting piece 45, a transmission slider 46, a transmission shaft 47 and a transmission bearing 48.

The cylinder 41 is used as a power source, the cylinder 41 is fixed on the base plate 1 through a cylinder mounting column 41-1, and the cylinder 41 is provided with a piston rod for outputting power. The two sets of driving devices 4 in the same group are installed with piston rods of respective cylinders 41 in opposite directions. The drive plate slide rails 42 are respectively and fixedly arranged on the front end of the air cylinder 41 on the base plate 1 up and down, and drive plate sliders 43 which can slide by the drive plate slide rails 42 are arranged on the 2 drive plate slide rails 42. The driving plate 44 is a shaped plate, each part of the rear end surface of the driving plate 44 is divided into a first slider connecting part 44-1, a second slider connecting part 44-2, a cylinder power connecting part 44-3 and a synchronous driving rack connecting part 44-4 according to the connected components, a driving counter bore 44-5 is obliquely arranged on the front end surface of the driving plate 44, and the structure of the driving plate 44 is shown in fig. 7 to 9. The driving plate 44 is respectively fixedly connected with the front ends of the driving plate sliding blocks 43 on the 2 driving plate sliding rails 42 through a first sliding block connecting part 44-1 and a second sliding block connecting part 44-2; the driving plate 44 is fixedly connected with the front end of the piston rod connecting piece 45 through the cylinder power connecting part 44-3, and the rear end of the piston rod connecting piece 45 is fixedly connected with the piston rod of the cylinder 41, so that under the driving action of the cylinder 41 and the transmission action of the piston rod connecting piece 45, the driving plate 44 can stably and smoothly move by depending on 2 driving plate sliding rails 42 and the driving plate sliding blocks 43 on the driving plate sliding rails.

Referring to fig. 6, the transmission sliding block 46 is a structural member matched with the sliding groove 12 of the base disc 1, the front end of the transmission shaft 47 is fixedly connected with the transmission sliding block 46, and the rear end of the transmission shaft 47 is sleeved with the transmission bearing 48; drive bearing 48 is movably disposed within drive counterbore 44-5 of drive plate 44.

Still referring to fig. 1, 4 sets of driving devices 4 are respectively connected with 1 sliding chute 12 of the base disc 1 in a sliding fit manner through a transmission slide block 46, and 1 clamping jaw 2 of 4 is fixedly arranged on each transmission slide block 46.

When the base disc is in work, the driving plate 44 moves due to the driving force of the air cylinder 41, the transmission bearing 48 rolls in the oblique driving counter bore 44-5 of the driving plate 44 and is transmitted through the transmission shaft 47, so that the transmission slide block 46 makes linear motion in the chute 12 of the base disc 1, and further, the clamping jaw 2 fixedly mounted on the transmission slide block 46 makes linear motion in the vertical direction or the left-right direction.

The above structural design of the driving device 4 of the embodiment makes it operate stably without interference during working, and has fast driving response and high efficiency.

Referring to fig. 2 to 5, 2 sets of synchronizing mechanisms 5 with the same structure are arranged at the rear end of the base plate 1, wherein the 1 set of synchronizing mechanism 5 is used for realizing the synchronous driving of 2 sets of driving devices 4 in the vertical direction so as to realize the synchronous motion among 2 clamping jaws in the vertical direction; the other 1 set of synchronizing mechanism 5 is used for realizing the synchronous driving of the left and right 2 sets of driving devices 4 and further realizing the synchronous motion among the left and right 2 clamping jaws 2.

The synchronous mechanism 5 mainly comprises 2 synchronous driving racks 51, 2 synchronous gears 52 and a synchronous connecting piece 53. The 2 synchronous driving racks 51 are fixedly arranged at 1 position of a synchronous driving rack connecting part 44-4 of each driving plate 44 of the same group of 2 sets of driving devices 4, the 2 synchronous driving racks 51 extend out of the corresponding driving plates 44 in the same direction, and the tooth parts of the 2 synchronous driving racks 51 are oppositely arranged. The synchronizing gear 52 is a gear with a special-shaped structure, and the structure of the synchronizing gear 52 is as shown in fig. 10, the synchronizing gear 52 is integrally composed of a gear shaft 52-1, a driving tooth portion 52-2 arranged outside the front end of the gear shaft 52-1 and a driven tooth portion 52-3 arranged outside the rear end of the gear shaft 52-1, 2 synchronizing gears 52 are respectively matched with 2 synchronizing driving racks 51 and rotatably arranged on the base plate 1, and the 2 synchronizing driving racks 51 are respectively meshed with the driving tooth portion 52-2 of the 1 synchronizing gear 52, so that the synchronizing driving racks 51 are driven to move when the driving plate 44 of the driving device 4 moves, and the synchronizing gears 52 rotate.

The synchronous connecting piece 53 is used for realizing the movable fit connection of the 2 synchronous gears 52, and the structure of the synchronous connecting piece 53 is shown in fig. 11, and mainly comprises a connecting plate 53-1, a first rack 53-2 and a second rack 53-3 which are respectively fixedly connected with two ends of the connecting plate 53-1, a synchronous sliding rail 53-4 arranged on the inner side of the connecting plate 53-1, and a synchronous sliding block 53-5 which is fixedly arranged on the connecting plate 53-1 and is in sliding fit with the synchronous sliding rail 53-4. The synchronous slide rail 53-4 of the synchronous connecting piece 53 is fixedly arranged on the outer end surface of the connecting seat 3, and the first rack 53-2 and the second rack 53-3 of the synchronous connecting piece 53 are respectively meshed with the driven tooth parts 52-3 of the 1 synchronous gear 52. The synchronous sliding rail 53-4 and the synchronous sliding block 53-5 are preferably arranged, and the synchronous sliding rail 53-4 and the synchronous sliding block 53-5 play a guiding and supporting role to ensure that the first rack 53-2 and the second rack 53-3 are meshed with the 2 synchronous gears 52 more accurately.

During operation, through the restraint of synchronous connecting piece 53, make 2 synchronous gear 52 synchronous rotations, rethread 2 synchronous drive rack 51's restraint, make with 2 synchronous drive rack 51 respectively fixed connection the same 2 sets of drive plate 44 of drive arrangement 4 respective synchronous motion of 2, and then make 2 clamping jaws 2 that are driven respectively by the same 2 sets of drive arrangement 4 of a set of.

As can be seen from the foregoing, the above-mentioned structural design of the synchronization mechanism 5 of the present embodiment enables the same set of 2 sets of driving devices 4 to effectively ensure accurate synchronization of movement when working, so as to enable the 2 clamping jaws 2 respectively driven by the same set of 2 sets of driving devices 4 to perform accurate synchronization movement, and compared with the synchronization mechanism of the chuck in the prior art, the synchronization mechanism has higher synchronization accuracy; and the gear and rack matching and the assistance of the synchronous sliding rail 53-4 and the synchronous sliding block 53-5 are adopted, so that the synchronous mechanism 5 runs smoothly without interference when working, and the working reliability is high.

The working principle and process of the chuck for the laser pipe cutting machine of the embodiment are briefly described as follows:

taking 2 clamping jaws 2 moving up and down as an example, during work, air is simultaneously fed into respective air cylinders 41 of 2 sets of driving devices 4 moving up and down in the same group, piston rods of the 2 air cylinders 41 extend in opposite directions, corresponding driving plates 44 are driven to move by corresponding driving plate sliders 43 and driving plate slide rails 42 through corresponding piston rod connecting pieces 45 respectively, the moving directions of the 2 driving plates 44 are opposite, and the opposite movements of the 2 driving plates 44 are driven by driving bearings 48 and driving shafts 47 respectively, so that the corresponding 2 driving sliders 46 perform centripetal linear sliding in the up-and-down 2 sliding grooves 12 of the base disc 1, and the up-and-down 2 clamping jaws 2 are driven to perform opposite movement to clamp a processed pipe fitting inserted into a pipe fitting 11 of the base disc 1 through a hole; when 2 sets of driving devices 4 drive 2 clamping jaws 2 to perform opposite clamping action, 2 drive plates 44 with reverse motion push and pull, so that 2 synchronous drive racks 51 fixedly arranged on 2 drive plates 44 perform reverse motion, 2 synchronous drive racks 51 move to enable 2 synchronous gears 52 to rotate in the same direction, synchronous connecting pieces 53 with two ends respectively meshed with the 2 synchronous gears 52 perform rigid constraint on the synchronism of the 2 synchronous gears 52 in the same direction, and the synchronous mechanism 5 performs rigid constraint on the movement synchronism of the 2 drive plates 44 with reverse motion, thereby ensuring that the 2 clamping jaws 2 move up and down in an opposite clamping motion process to be accurate and synchronous. When the respective cylinders 41 of the 2 sets of driving devices 4 which face up and down simultaneously give vent to air, the actions of the 2 sets of driving devices 4, the synchronizing mechanism 5 and the 2 clamping jaws 2 are opposite to those of the air inlet, the 2 clamping jaws 2 move away from each other to loosen the pipe to be processed, and the synchronizing mechanism 5 similarly ensures the synchronism of the 2 clamping jaws 2 in the process of moving away from each other up and down. Similarly, the working principle and process of the 2 clamping jaws 2 moving left and right are basically the same, and are not described in detail.

The above embodiments are illustrative of specific embodiments of the present invention, and are not restrictive of the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions, and therefore all equivalent technical solutions should be included in the scope of the present invention.

Claims (5)

1. The utility model provides a chuck for laser pipe cutting machine, includes as the basal disc of installation basis, can be respectively about to and about to locating 2 groups of basal disc front end 4 clamping jaws altogether with moving about, locate that the basal disc rear end is used for dividing into of the motion of corresponding 4 clamping jaws of drive about to and about to 2 groups and every each 2 drive arrangement of group, the centre department of basal disc is equipped with the pipe fitting clearing hole, is equipped with about on the basal disc to and each 2 spouts of about to, its characterized in that: still including being arranged in 2 sets of drive arrangement's in 2 sets of drive arrangement respectively the motion synchronism carry out the 2 sets of rack and pinion formula's of rigidity restraint lazytongs, lazytongs includes respectively with 2 sets of drive arrangement fixed connection's of same group 2 synchronous drive racks, rotationally locates on the basal disc and corresponds 2 synchronous gears of meshing with 2 synchronous drive racks respectively to and both ends respectively with 2 synchronous gear engaged's synchro-nization connecting piece.

2. The chuck for a laser pipe cutter as defined in claim 1, wherein: the synchronous connecting piece of the synchronous mechanism comprises a connecting plate, a first rack and a second rack which are respectively and fixedly connected with two ends of the connecting plate; the synchronous gears are special-shaped gears which are integrally formed by a gear shaft, a driving tooth part and a driven tooth part which are respectively arranged at the outer sides of the front end and the rear end of the gear shaft, 2 synchronous gears are respectively meshed with the 2 synchronous driving racks through the driving tooth part, and 2 synchronous gears are respectively meshed with the first rack and the second rack of the synchronous connecting piece through the driven tooth part.

3. The chuck for a laser pipe cutter as defined in claim 2, wherein: the chuck also comprises a connecting seat fixedly arranged in the middle of the rear end face of the base plate, the connecting seat is a hollow structural member with openings at the front end and the rear end, and the hollow part of the connecting seat is communicated with the pipe fitting through hole of the base plate; the synchronous connecting piece of the synchronous mechanism further comprises a synchronous sliding rail fixedly arranged on the connecting seat, and a synchronous sliding block fixedly arranged on the connecting plate and in sliding fit with the synchronous sliding rail.

4. The chuck for a laser pipe cutter as defined in claim 3, wherein: the pipe fitting through hole of the base plate is a square hole; the end faces of the front opening and the rear opening of the connecting seat are square.

5. The chuck for a laser pipe cutter as claimed in any one of claims 1 to 4, wherein: the driving device comprises an air cylinder fixedly arranged on a base plate, 1 drive plate slide rail, a drive plate slide block, a drive plate, a piston rod connecting piece, a transmission bearing, a transmission slide block and a transmission shaft, wherein the drive plate slide rails are fixedly arranged on the base plate, the drive plate slide rails are respectively and fixedly arranged on two sides of the air cylinder on the base plate, the drive plate slide block is slidably arranged on the drive plate slide rails, the rear end face of the drive plate slide block is fixedly connected with the drive plate slide block, the front end face of the drive plate slide block is obliquely provided with a drive counter bore, the front end and the rear end of the piston rod connecting piece are respectively and fixedly connected with a piston rod arranged on the drive plate and the air cylinder, the transmission bearing is rotatably arranged in the drive counter bore of the drive plate, the transmission slide block is movably arranged in a chute of the base plate and is fixed with 1 clamping jaw, and the transmission shaft is sleeved with the transmission bearing at the rear end and fixedly connected with the transmission slide block at the front end; the piston rods of the respective cylinders of the 2 sets of driving devices in the same group are arranged in opposite directions; and 1 synchronous driving rack of 2 synchronous driving mechanisms is fixedly arranged on each driving plate of 2 sets of driving devices in the same group.

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