CN217799643U

CN217799643U - Gear rack transmission full-stroke heavy-load laser pipe cutting chuck

Info

Publication number: CN217799643U
Application number: CN202221159770.7U
Authority: CN
Inventors: 牟燕峰; 钟德峰; 朱其楚
Original assignee: Changzhou Biyoute Machinery Technology Co ltd
Current assignee: Changzhou Biyoute Machinery Technology Co ltd
Priority date: 2022-05-14
Filing date: 2022-05-14
Publication date: 2022-11-15
Anticipated expiration: 2032-05-14

Abstract

The utility model provides a rack and pinion transmission full stroke heavy load laser pipe cutting chuck, including the back lid, be equipped with horizontal and the vertical protecgulum of four spouts altogether, respectively establish the slider of one in every spout, respectively establish the jack catch of one on every slider, locate the synchronous drive mechanism between protecgulum and the back lid, synchronous drive mechanism includes two sets of four cylinders altogether, respectively establish a drive rack on every cylinder block, every drives the drive rack and sets a set of drive gear group rather than the meshing, and the cylinder block that is used for realizing the two sets of cylinders of drive two sets of sliders with great ease is synchronous motion's synchronizing assembly respectively, one side outer end of slider is equipped with and organizes the drive tooth of meshing with drive gear, the outer end of the piston rod that each cylinder has is fixed, the cylinder block motion. The utility model discloses a brand-new design of the drive tooth of synchronous drive mechanism and slider makes it realize the full stroke operation and be suitable for the heavy load under the prerequisite that does not increase external dimension, and transmission efficiency and synchronous precision height.

Description

Gear rack transmission full-stroke heavy-load laser pipe cutting chuck

Technical Field

The utility model relates to a supplementary worker utensil technical field of laser cutting pipe, concretely relates to rack and pinion transmission full stroke heavy load laser cutting pipe chuck.

Background

The chuck is a necessary auxiliary tool for the laser cutting machine during working, and when the laser cutting machine is used for cutting and processing workpieces such as pipes, the workpiece is clamped or clamped by the chuck and rotates to be matched with the laser cutting machine for processing the workpiece. The existing chuck generally comprises a front cover, a rear cover, a pair of transverse clamping jaws and a pair of longitudinal clamping jaws which are movably arranged on the front cover, 4 sliding blocks which are movably arranged in 4 sliding grooves of the front cover, a driving mechanism which is arranged between the front cover and the rear cover and correspondingly drives the two pairs of clamping jaws to move by driving the sliding blocks, a synchronizing mechanism which is used for realizing the respective synchronous movement of the two pairs of clamping jaws, a rack which is used as an installation base, a rotary driving mechanism in which a rotary transmission gear is arranged, and the like. In the early laser pipe cutting chuck, a driving mechanism and a synchronizing mechanism are generally arranged respectively, and the synchronizing mechanism mostly adopts a link structure, such as the chuck disclosed in the chinese patent document with the publication number CN106984842B, because the synchronization precision of the link type synchronizing mechanism is gradually eliminated to a limited extent, and the driving mechanism and the synchronizing mechanism are generally not separated any more in the chuck at present, but the synchronizing mechanism and the driving mechanism are integrated into a synchronous driving mechanism, such as the chuck for laser pipe cutting disclosed in the chinese patent document with the publication number CN215846412U, which adopts a flexible member such as a chain and the like as a synchronous and transmission member, and the chain is connected with a slide block through a transmission rod so that two pairs of jaws respectively perform synchronous motion, although the chuck has good synchronization, the chuck cannot realize heavy load, that is, when the chuck is clamped to work with large size and weight, the chuck is not suitable.

At present, due to the advantages of reliable transmission, high transmission efficiency and the like, the chucks of gear-meshing transmission mechanisms are currently considered in the industry, and the chucks of various gear-meshing transmission mechanisms appear in the market, for example, chinese patent document with the publication number of CN214443938U discloses a chuck for a laser cutting machine, wherein piston rods of two transverse driving cylinders 71 jointly drive a transverse gear disc 73 to rotate by relying on a mandrel 3, piston rods of two longitudinal driving cylinders 72 jointly drive a longitudinal gear disc 74 to rotate by relying on the mandrel 3, the transverse gear disc 73 and the longitudinal gear disc 74 respectively drive two transmission gears 75 to rotate, and the transverse transmission gears 75 and the longitudinal transmission gears 75 respectively drive a sliding seat 42 provided with a rack 422 to slide in a sliding groove 41 so as to realize synchronous motion of two pairs of jaws. The chuck can realize better motion synchronism of each pair of jaws in the transverse direction and the longitudinal direction, but the following improvements can be obviously improved: firstly, the cylinder pushes the gear disc to rotate by relying on the mandrel, and the gear disc and the mandrel are in sliding friction, so that the power loss of the whole machine is large; secondly, the cylinder body of the air cylinder is fixed, the power of the air cylinder is output to the gear disc through the swinging of the piston rod, the piston rod of the air cylinder drives the gear disc to rotate through the deflector rod, and the speed of the clamping jaw 5 is uneven in the movement process due to the fact that the output force changes greatly in the rotation movement process, and the change of speed is suddenly fast and suddenly slow, so that the clamping jaw is not favorable for stably and reliably clamping a processed workpiece; thirdly, due to the structural limitation, the stroke of the cylinder is small in the working process, in order to realize the full stroke movement of the clamping jaw (namely, the clamping jaw moves from a butt joint state to a state of completely exposing a middle clamping piece hole), the sliding seat 42 and the rack 422 on the sliding seat 42 need to be arranged longer, the stroke of the sliding seat 42 is large in the operation process, and the clamping jaw is very laborious for heavy load, so that the clamping jaw is not suitable for heavy load; meanwhile, because the stroke of the sliding seat 42 is large and exceeds the range of the chuck body, an auxiliary supporting seat 43 needs to be additionally arranged at the outer end of each sliding groove of the chuck body, the peripheral size of the chuck is greatly increased, and the manufacturing and transportation cost of equipment is increased; fourthly, the cylindrical mandrel 3 is a supporting foundation for the rotation of the transverse gear disc 73 and the longitudinal gear disc 74, so that the middle hole for the clamp to pass through can only be a round hole and is difficult to be made into a square hole, and meanwhile, the mandrel 3 cannot be independently taken out of the whole chuck during maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: in order to solve the problems in the prior art, the gear rack transmission full-stroke heavy-load laser pipe cutting chuck which is a brand new improvement on the driving and synchronizing mechanism of the existing chuck is provided.

The technical scheme of the utility model is that: the utility model discloses a full stroke heavy load laser pipe cutting chuck of rack and pinion transmission, including the back lid, locate above-mentioned back lid the place ahead and be equipped with the protecgulum of a pair of horizontal spout and a pair of fore-and-aft spout, each movably sets up the slider of one in every above-mentioned spout, each fixed jack catch that sets up one on every above-mentioned slider, the centre department of above-mentioned protecgulum and back lid is equipped with the folder hole, and its structural feature is: the synchronous driving mechanism comprises two cylinders for respectively driving the two transverse sliders and two cylinders for respectively driving the two longitudinal sliders to move, a driving rack is fixedly arranged on a cylinder body of each cylinder, each driving rack is provided with a group of transmission gear groups in meshing transmission connection with the driving rack, and a synchronous assembly for respectively driving the cylinder bodies of the two cylinders of the two transverse sliders and the cylinder bodies of the two cylinders for driving the two longitudinal sliders to synchronously move, the outer end of one side of each slider, close to the chute, is provided with driving teeth, and each slider is in meshing transmission connection with the corresponding group of transmission gear groups through the driving teeth; the outer end of a piston rod of each cylinder is fixedly arranged.

The further scheme is as follows: the gear rack transmission full-stroke heavy-load laser pipe cutting chuck further comprises an intermediate dust cover, the clamping piece hole is a square hole or a round hole, the intermediate dust cover is a cylindrical plate structural member with the periphery shape matched with the clamping piece hole, and the front end and the rear end of the intermediate dust cover are detachably mounted in the clamping piece holes of the front cover and the rear cover.

The further scheme is as follows: the transmission gear set of the synchronous driving mechanism comprises a driving gear meshed with a driving rack, a group of slide block driving gears which are arranged on the inner side and the outer side of the driving gear and drive the slide blocks to move together with the driving gear, and a group of intermediate transition gears which are arranged on one sides of the driving gear and the slide block driving gears and are used for realizing the synchronous movement of the slide block driving gears and the driving gear in the same direction; the transmission gear set is rotatably arranged on the front cover and is respectively provided with a set at each sliding groove of the front cover, the driving gear of the transmission gear set and the sliding block driving gear are arranged in a mode of being close to the sliding groove of the front cover, and the intermediate transition gear is arranged on one side of the front cover deviating from the sliding groove.

The further scheme is as follows: a group of slide block driving gears in the transmission gear group comprises three slide block driving gears, namely a first slide block driving gear and a second slide block driving gear which are arranged adjacent to the driving gears and a third slide block driving gear which is arranged adjacent to the second slide block driving gear; the group of intermediate transition gears comprises three intermediate transition gears, namely a first intermediate transition gear and a second intermediate transition gear which are arranged adjacent to the driving gear and a third intermediate transition gear which is arranged adjacent to the second intermediate transition gear;

the first intermediate transition gear and the second intermediate transition gear are respectively in meshed transmission connection with the driving gear; the first sliding block driving gear is meshed with the first intermediate transition gear and synchronously rotates in the same direction as the driving gear through the transmission and reversing of the first intermediate transition gear; the second slide block driving gear is respectively meshed with the second intermediate transition gear and the third intermediate transition gear, and the second slide block driving gear synchronously rotates in the same direction as the driving gear through the transmission and the reversing of the second intermediate transition gear and drives the third intermediate transition gear to rotate; the third slider driving gear is meshed with the third intermediate transition gear and synchronously rotates in the same direction as the driving gear through the transmission and reversing of the third intermediate transition gear; when the sliding block transmission mechanism is used, each sliding block driving gear and each sliding block driving gear of the same transmission gear set are respectively meshed with the driving gear of the corresponding sliding block to drive the corresponding sliding block to move in the corresponding sliding groove of the front cover.

The further scheme is as follows: the outer ends of the piston rods of the four cylinders are respectively fixedly connected with a piston rod fixing column which is arranged and fixedly arranged between the front cover and the rear cover; the four cylinders are respectively provided with a group of cylinder body guide limiting wheels for limiting and guiding the movement of the cylinder body of the cylinder, and each group of cylinder body guide limiting wheels are rotatably arranged on the front cover and the rear cover and are positioned on the front side and the rear side of the running track of the corresponding cylinder body.

The further scheme is as follows: the synchronous component of the synchronous driving mechanism comprises a first flexible connecting piece, a second synchronous flexible connecting piece, a reversing roller and a roller mounting shaft, wherein the first flexible connecting piece is used for fixedly connecting cylinder bodies of two cylinders for driving two transverse sliders to move, the second synchronous flexible connecting piece is used for fixedly connecting cylinder bodies of two cylinders for driving two longitudinal sliders to move, the reversing roller is used for realizing the direction conversion of the first flexible connecting piece and the second flexible connecting piece, and the roller mounting shaft is fixedly arranged between the front cover and the rear cover and used for mounting the reversing roller.

The further scheme is as follows: the roller mounting shafts are respectively arranged at four corners of the clamping piece hole, and are fixedly connected with the front cover and the rear cover by the front end and the rear end respectively; the reversing rollers are respectively and rotatably arranged on the front and the back of each roller mounting shaft; the first flexible connecting piece and the second flexible connecting piece are respectively provided with two pieces; two ends of each first flexible connecting piece are respectively and fixedly connected with a cylinder body of a cylinder driving two transverse sliding blocks to move, and are respectively reversed through two reversing rollers positioned on the front side; two ends of each second flexible connecting piece are respectively and fixedly connected with a cylinder body of a cylinder driving two longitudinal sliding blocks to move, and are respectively reversed through two reversing rollers positioned at the rear side.

The further scheme is as follows: the first flexible connecting piece and the second flexible connecting piece are steel belts, chains, synchronous belts or steel wire ropes.

The utility model discloses positive effect has:

(1) The utility model discloses a set up the structure of drive rack, drive gear group and the structural design of the drive tooth of installation design and slider on synchronous drive mechanism's the cylinder block, make the utility model discloses a chuck is outside the outer end that realizes each slider of full stroke operation in-process does not stretch out the protecgulum to effectively solved among the prior art like chuck need add the corresponding manufacturing of the increase equipment of bringing of the chuck peripheral dimension increase of establishing the spout that extends and leading to again in the outer end of each spout of protecgulum for realizing the full stroke operation.

(2) The utility model discloses the power of cylinder output is by the drive rack on the cylinder block and drive gear group and the meshing transmission between the slider, and the transmission is powerful, reliable, for the sliding friction transmission of ubiquitous among the prior art, power loss is few, and transmission efficiency is high.

(3) The utility model discloses the power of cylinder output is via the fixed drive rack straight line output that locates on the cylinder block of activity, and the output power is stable unchangeable to make the jack catch even at motion in-process speed, effectively solved among the prior art chuck cylinder power swing output of the same kind cause the jack catch operation in-process to exist suddenly slowly change be unfavorable for the technical problem of jack catch stable and reliable ground centre gripping processed work piece.

(4) The utility model discloses the stroke of the cylinder block of cylinder is 1 with the stroke proportion of slider: and the power of the cylinder is transmitted to the sliding block through the meshing of the rack and the gear, so that the heavy-load machined workpiece is suitable, and the technical problem that the chuck of the same type in the prior art is difficultly suitable for heavy load due to small stroke of the cylinder and large stroke of the sliding block is effectively solved.

(5) The utility model discloses a structure and the brand-new design of mounting means of synchronizing assembly can make two pairs of jack catchs realize the synchronization of high accuracy at the during operation.

(6) The utility model discloses an overall structure's design makes its middle dust cover not regard as the installation basis of other components, and detachably installs downtheholely at the folder, can tear out alone in the use, and the convenience is adjusted, is adjusted and is overhauld chuck inside.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with the slider and the latch removed;

FIG. 3 is a schematic view of the front cover and intermediate dust cap of FIG. 2 with one half removed;

FIG. 4 is a schematic structural view of the front cover of FIG. 3 with the other half removed;

FIG. 5 is a schematic view of the rear cover and intermediate dust cap of FIG. 2 shown removed and viewed from the rear of FIG. 2;

FIG. 6 is a schematic view of a connection structure between the slider and the jaws in FIG. 1;

fig. 7 is a schematic view of the transmission structure between the cylinder, the transmission gear set and the slider of the present invention.

The reference numbers in the above figures are as follows:

the front cover 1, the clamp piece hole 11 and the sliding chute 12; a rear cover 2; a middle dust cover 3 and a claw 4; a slider 5, a drive tooth 51; the device comprises a synchronous driving mechanism 6, an air cylinder 61, an air cylinder body 61-1, a piston rod 61-2, a piston rod fixing column 61-3, an air cylinder body guide limiting wheel 61-4, a driving rack 62, a transmission gear set 63, a driving gear 63-1, a slider driving gear 63-2, a first slider driving gear 63-2-1, a second slider driving gear 63-2-2, a third slider driving gear 63-2-3, an intermediate transition gear 63-3, a first intermediate transition gear 63-3-1, a second intermediate transition gear 63-3-2, a third intermediate transition gear 63-3-3, a synchronizing assembly 64, a first flexible connecting piece 64-1, a second flexible connecting piece 64-2, a reversing roller 64-3 and a roller mounting shaft 64-4.

Detailed Description

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

(example 1)

Referring to fig. 1 to 7, the full-stroke heavy-duty laser pipe cutting chuck with gear rack transmission of the present embodiment mainly comprises a front cover 1, a rear cover 2, a middle dust cover 3, a jaw 4, a slider 5 and a synchronous driving mechanism 6.

The protecgulum 1 is discoid structure for whole, and the centre department of protecgulum 1 is equipped with the front and back and is used for the folder hole 11 that is passed through by the centre gripping work piece when using to link up, and folder hole 11 can adopt the round hole, also can adopt the square hole, preferably adopts the square hole in this embodiment. The front cover 1 is respectively provided with two sliding chutes 12 in the transverse direction and the longitudinal direction; the inner ends of the four sliding grooves 12 are communicated with the clamping piece hole 11. The rear cover 2 is a structural member which is integrally disc-shaped, and a clamping piece hole which is communicated with the clamping piece hole 11 of the front cover 1 in the front-back direction is arranged in the middle of the rear cover 2.

The middle dust cover 3 is a cylindrical plate structure member with an end face shape adapted to the shape (circular or square) of the clamping piece hole 11 of the front cover 1, in this embodiment, the middle dust cover 3 is a square cylindrical structure member, and the structure member generally has a different function as an installation base compared with the prior art, in this embodiment, the middle dust cover 3 is only used for preventing dust from entering the inside of the chuck during use and is not used as an installation base of other members, the front end and the rear end of the middle dust cover 3 are detachably installed in the clamping piece hole 11 of the front cover 1 and the clamping piece hole of the rear cover 2, and the middle dust cover 3 of this embodiment can be detachably installed in this way, so that the middle dust cover can be detached independently, and the inside of the chuck can be conveniently adjusted, adjusted and maintained. The intermediate dust cover 3 is preferably provided.

Referring to fig. 1 and 6, the four jaws 4 are arranged, 2 jaws are arranged on each of the four jaws in the transverse direction and the longitudinal direction, and the structure of the jaws 4 is the same as that of the prior art and is not described in detail. Four sliders 5 are provided, and one slider 5 is slidably provided in each of the four sliding grooves 12 of the front cover 1. Four claws 4 are fixedly arranged one on each of four sliders 5. Be equipped with the driving tooth 51 on the slider 5, with the prior art in the slider along length direction one side establish the driving tooth difference entirely, the driving tooth 51 sets up shorter section for the outer end at the chuck center in slider 5 along length direction one side only in this embodiment, the driving tooth 51 is so designed on slider 5, it cooperatees with the improved design of the synchronous drive mechanism 6 of this embodiment, make the chuck of this embodiment can realize the full stroke motion while, can also guarantee that the outer end of slider 5 does not outwards stretch out in protecgulum 1.

Referring to fig. 3 to 5, the synchronous drive mechanism 6 is mainly composed of a cylinder 6, a drive rack 62, a transmission gear set 63, and a synchronizing assembly 64.

The cylinder 61 has a cylinder block 61-1 and a piston rod 61-2, and the number of the cylinders 61 is 4, which is the same as the prior art. Unlike the prior art in which the cylinder block 61-1 is fixedly disposed to be moved by the piston rod 61-2 to output the driving force, the present embodiment is configured such that the outer end of the piston rod 61-2 is fixedly disposed to be moved by the cylinder block 61-1 relative to the piston rod 61-2 to output the driving force. Correspondingly, each cylinder 61 is provided with a piston rod fixing column 61-3, the front end and the rear end of each piston rod fixing column 61-3 are fixedly connected with the front cover 1 and the rear cover 2 respectively, and the outer end of the piston rod 61-2 of each cylinder 61 is fixedly connected with one piston rod fixing column 61-3 respectively. Preferably, each cylinder 61 is further provided with a set of cylinder block guide limiting wheels 61-4 for limiting and guiding the movement of the cylinder block 61-1, the cylinder block guide limiting wheels 61-4 are rollers, and the set of cylinder block guide limiting wheels 61-4 provided for each cylinder 61 are rotatably disposed on the front cover 1 and the rear cover 2 and located on the front side and the rear side of the moving track of the cylinder block 61-1.

The driving racks 62 are fixedly provided one by one on the cylinder block 61-1 of each cylinder 61.

The transmission gear set 63 is used to drive the cylinder block 61-1 of the cylinder 61 to the slider 5 by driving the rack gear 62. The transmission gear set 63 is rotatably provided on the front cover 1 and 1 set is provided at each slide groove 12 of the front cover 1.

Referring to fig. 7 and 3, as a specific implementation manner, the transmission gear set 63 includes a pinion gear 63-1 engaged with the driving rack 62, a set of slider driving gears 63-2 disposed on both inner and outer sides of the pinion gear 63-1 and driving the slider 5 to move together with the pinion gear 63-1, and a set of intermediate transition gears 63-3 disposed on one side of the pinion gear 63-1 and the slider driving gears 63-2 and used for implementing synchronous movement of each slider driving gear 63-2 and the pinion gear 63-1 in the same direction. In this embodiment, three slider driving gears 63-2 are provided, namely, a first slider driving gear 63-2-1 and a second slider driving gear 63-2-2 which are disposed adjacent to the driving gear 63-1, and a third slider driving gear 63-2-3 which is disposed adjacent to the second slider driving gear 63-2-2; correspondingly, three intermediate transition gears 63-3 are provided, namely a first intermediate transition gear 63-3-1 and a second intermediate transition gear 63-3-2 which are disposed adjacent to the driving gear 63-1, and a third intermediate transition gear 63-3-3 which is disposed adjacent to the second intermediate transition gear 63-3-2.

The first intermediate transition gear 63-3-1 and the second intermediate transition gear 63-3-2 are respectively in meshed transmission connection with the driving gear 63-1; the first sliding block driving gear 63-2-1 is meshed with the first intermediate transition gear 63-3-1, and synchronous and same-direction rotation with the driving gear 63-1 is realized through transmission and reversing of the first intermediate transition gear 63-3-1; the second sliding block driving gear 63-2-2 is respectively meshed with the second intermediate transition gear 63-3-2 and the third intermediate transition gear 63-3-3, and the second sliding block driving gear 63-2-2 synchronously rotates in the same direction as the driving gear 63-1 through the transmission and reversing of the second intermediate transition gear 63-3-2 and drives the third intermediate transition gear 63-3-3 to rotate; the third slider driving gear 63-2-3 is meshed with the third intermediate transition gear 63-3-3, and synchronous and same-direction rotation with the driving gear 63-1 is realized through transmission and reversing of the third intermediate transition gear 63-3-3. The driving gear 63-1 and each sliding block driving gear 63-2 of the transmission gear set 63 are arranged close to the sliding chute 12 of the front cover 1, and each intermediate transition gear 63-3 is arranged on one side of the front cover 1, which is far away from the sliding chute 12.

During operation, each slide block driving gear 63-2 and each driving gear 63-1 of the same transmission gear set 63 are respectively meshed with the driving gear 51 of the corresponding slide block 5 to drive the corresponding slide block 5 to move in the corresponding sliding groove 12 of the front cover 1, so as to drive the clamping jaws 4 fixedly arranged on the slide block 5 to move. When a pair of jaws 4 which are transversely or longitudinally opposite move to the butting position, the driving teeth 51 of the corresponding slide blocks 5 of the jaws 4 are meshed with the third slide block driving gear 63-2-3 which is positioned at the innermost side in the corresponding transmission gear set 63; when a pair of jaws 4 which are transversely or longitudinally opposite move to expose the clamping piece holes 11 of the front cover 1 completely without shielding, the driving teeth 51 of the sliding blocks 5 corresponding to the jaws 4 are meshed with the first sliding block driving gear 63-2-1 which is positioned at the outermost side in the corresponding transmission gear set 63, so that the full-stroke operation of the chuck of the embodiment is realized, and the outer ends of the sliding blocks 5 do not extend out of the front cover 1, so that the problem of the increase of the peripheral size of the similar chuck in the prior art is solved. The power output by the cylinder 6 is transmitted by the meshing between the driving rack 62 and the transmission gear set 63 and between the transmission gear set 63 and the sliding block 5, the transmission is powerful and reliable, and the power loss is less compared with the sliding friction transmission power loss in the prior art. The power of the cylinder 61 is output linearly through the driving rack 62, the output force is stable and constant, so that the speed of the jaws 4 is uniform in the moving process, the technical problem that in the prior art, the swing output of the cylinder power causes that the change of sudden and slow in the operation process of the clamping jaw is not beneficial to the clamping jaw to stably and reliably clamp the machined workpiece is solved. The ratio of the stroke of the cylinder block 61-1 of the cylinder 61 to the stroke of the slider 5 is 1:1, and the power of cylinder 61 all through rack and pinion meshing transmission to slider 5, consequently is fit for the heavy load to solved the technical problem that the cylinder stroke is little and the slider stroke is big to be moved hard and is not fit for the heavy load among the prior art.

Still referring to fig. 3-5, a synchronizing assembly 64 is provided for synchronizing the movement of each pair of jaws 4, both laterally and longitudinally. The synchronizing assembly 64 includes a first flex connector 64-1, a second synchronizing flex connector 64-2, a reversing roller 64-3 and a roller mounting shaft 64-4.

The roller mounting shafts 64-4 are respectively provided with 1 at 4 corners of the clamping piece hole 11 of the front cover 1, and the roller mounting shafts 64-4 are respectively fixedly connected with the front cover 1 and the rear cover 2 by the front end and the rear end thereof. The reversing rollers 64-3 are respectively and rotatably arranged on 2 front and back of each roller mounting shaft 64-4. The first flexible connecting element 64-1 and the second flexible connecting element 64-2 can be steel belts, chains, synchronous belts, steel wire ropes, etc., in this embodiment, chains are used; the first flexible connecting piece 64-1 and the second synchronous flexible connecting piece 64-2 are respectively provided with two flexible connecting pieces; two ends of each of the two first flexible connecting pieces 64-1 are respectively and fixedly connected with the cylinder bodies 61-1 of the two cylinders 61 driving the transverse pair of clamping jaws 4 to move, and are respectively reversed through 2 reversing rollers 64-3 positioned on the front side; two ends of each of the two second flexible connecting pieces 64-2 are fixedly connected with the cylinder bodies 61-1 of the two cylinders 61 driving the longitudinal pair of jaws 4 to move respectively, and are reversed respectively through 2 reversing rollers 64-3 positioned at the rear side. Therefore, in operation, the cylinder bodies 61-1 of the two cylinders 61 driving the transverse pair of jaws 4 to move synchronously move through the two first flexible connecting pieces 64-1, and then the transverse pair of jaws 4 are driven to move synchronously through the corresponding driving racks 62, the transmission gear set 63 and the sliding block 5; the cylinder bodies 61-1 of the two cylinders 61 for driving the longitudinal pair of jaws 4 to move are synchronously moved through the two second flexible connectors 64-2, and then the longitudinal pair of jaws 4 are synchronously moved through the corresponding driving rack 62, the transmission gear set 63 and the slide block 5. The synchronizing assembly 64 of the present embodiment directly and fixedly connects the cylinder blocks 61-1 of the two sets of cylinders 61 moving as power sources, so that it can make the synchronizing accuracy of the two pairs of jaws 4 higher compared to the synchronizing mechanism of the same kind of chucks in the prior art.

The working principle and the process of the gear rack transmission full-stroke heavy-duty laser pipe cutting chuck of the embodiment are briefly described as follows:

during work, when the 4 cylinders 6 are charged, the cylinder bodies 61-1 of the 4 cylinders 6 do stretching movement relative to the respective piston rods with one fixed end, and the movement of each cylinder body 61-1 is transmitted by the corresponding driving rack 62, the transmission gear set 63 and the slide block 5, so that each 2 transverse and longitudinal jaws respectively and synchronously do clamping movement towards the center of the chuck under the action of the synchronizing assembly 64 and even clamp a processed workpiece passing through the clamp hole 11 of the front cover 1; when 4 air cylinders 6 are exhausted, each 2 transverse and longitudinal clamping jaws synchronously move away from the center of the chuck under the action of the synchronous assembly 64 to loosen the machined workpiece.

The above embodiments are illustrative of the specific embodiments of the present invention, but not limiting to the present invention, and those skilled in the relevant art can also make various changes and modifications to obtain the equivalent technical solutions without departing from the spirit and scope of the present invention, so that all equivalent technical solutions should fall under the protection scope of the present invention.

Claims

1. The utility model provides a rack and pinion transmission full stroke heavy load laser pipe cutting chuck, includes the back lid, locates back lid the place ahead and be equipped with the protecgulum of a pair of horizontal spout and a pair of fore-and-aft spout, every respectively movably sets up the slider of one in the spout, every respectively fix the jack catch that sets up one on the slider, the centre department of protecgulum and back lid is equipped with folder hole, its characterized in that: the synchronous driving mechanism is arranged between the front cover and the rear cover and fixedly connects the front cover and the rear cover and is used for driving the two transverse sliders and the two longitudinal sliders to respectively move synchronously; the outer end of a piston rod of each cylinder is fixedly arranged.

2. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 1, wherein: the clamping piece hole is a square hole or a round hole, the middle dust cover is a cylindrical plate structural member with the periphery shape matched with the shape of the clamping piece hole, and the front end and the rear end of the middle dust cover are detachably mounted in the clamping piece holes of the front cover and the rear cover.

3. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 1 wherein: the transmission gear set of the synchronous driving mechanism comprises a driving gear meshed with a driving rack, a group of slide block driving gears which are arranged on the inner side and the outer side of the driving gear and drive the slide blocks to move together with the driving gear, and a group of intermediate transition gears which are arranged on one sides of the driving gear and the slide block driving gears and are used for realizing the synchronous movement of the slide block driving gears and the driving gear in the same direction; the transmission gear set is rotatably arranged on the front cover and is respectively provided with a set at each sliding groove of the front cover, the driving gear of the transmission gear set and the sliding block driving gear are arranged in a mode of being close to the sliding groove of the front cover, and the intermediate transition gear is arranged on one side of the front cover deviating from the sliding groove.

4. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 3, wherein: a group of slide block driving gears in the transmission gear group comprises three slide block driving gears, namely a first slide block driving gear and a second slide block driving gear which are arranged adjacent to the driving gears and a third slide block driving gear which is arranged adjacent to the second slide block driving gear; the group of intermediate transition gears comprises three intermediate transition gears, namely a first intermediate transition gear and a second intermediate transition gear which are arranged adjacent to the driving gear and a third intermediate transition gear which is arranged adjacent to the second intermediate transition gear;

the first intermediate transition gear and the second intermediate transition gear are respectively in meshed transmission connection with the driving gear; the first slider driving gear is meshed with the first intermediate transition gear and synchronously rotates in the same direction as the driving gear through the transmission and reversing of the first intermediate transition gear; the second slide block driving gear is respectively meshed with the second intermediate transition gear and the third intermediate transition gear, and the second slide block driving gear synchronously rotates in the same direction as the driving gear through the transmission and reversing of the second intermediate transition gear and drives the third intermediate transition gear to rotate; the third slider driving gear is meshed with the third intermediate transition gear and synchronously rotates in the same direction as the driving gear through the transmission and reversing of the third intermediate transition gear; when the sliding block transmission mechanism is used, the sliding block driving gear and the sliding block driving gear of the same transmission gear set are respectively meshed with the driving gear of the corresponding sliding block to drive the corresponding sliding block to move in the corresponding sliding groove of the front cover.

5. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 1 wherein: the outer ends of the piston rods of the four cylinders are respectively fixedly connected with a piston rod fixing column which is arranged between the front cover and the rear cover; the four cylinders are respectively provided with a group of cylinder body guide limiting wheels for limiting and guiding the movement of the cylinder body of the cylinder, and each group of cylinder body guide limiting wheels are rotatably arranged on the front cover and the rear cover and are positioned on the front side and the rear side of the moving track of the corresponding cylinder body.

6. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 1, wherein: the synchronous component of the synchronous driving mechanism comprises a first flexible connecting piece, a second synchronous flexible connecting piece, a reversing roller and a roller mounting shaft, wherein the first flexible connecting piece is used for fixedly connecting cylinder bodies of two cylinders for driving two transverse sliders to move, the second synchronous flexible connecting piece is used for fixedly connecting cylinder bodies of two cylinders for driving two longitudinal sliders to move, the reversing roller is used for realizing the direction conversion of the first flexible connecting piece and the second flexible connecting piece, and the roller mounting shaft is fixedly arranged between the front cover and the rear cover and used for mounting the reversing roller.

7. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 6, wherein: the roller mounting shafts are respectively arranged at four corners of the clamping piece hole, and are fixedly connected with the front cover and the rear cover respectively from the front end and the rear end; the reversing rollers are respectively and rotatably arranged on the front and the back of each roller mounting shaft; the first flexible connecting piece and the second flexible connecting piece are respectively provided with two pieces; two ends of each first flexible connecting piece are respectively and fixedly connected with a cylinder body of a cylinder driving two transverse sliding blocks to move, and are respectively reversed through two reversing rollers positioned on the front side; two ends of each second flexible connecting piece are respectively and fixedly connected with a cylinder body of a cylinder driving two longitudinal sliding blocks to move, and are respectively reversed through two reversing rollers positioned at the rear side.

8. The rack and pinion drive full stroke heavy duty laser pipe cutting chuck of claim 6, wherein: the first flexible connecting piece and the second flexible connecting piece are steel belts, chains, synchronous belts or steel wire ropes.