CN212857804U - Full-stroke hollow pneumatic chuck - Google Patents

Abstract

The utility model discloses a full-stroke hollow pneumatic chuck, which comprises a chuck body, an inner sleeve and a gas distribution ring component which are fixedly connected in sequence along the axial direction of the chuck; the chuck body is made of aluminum; the front end of the chuck body is provided with a jaw component; the rear end of the chuck body is provided with a rotary supporting component sleeved on the inner sleeve; the chuck also comprises a driving mechanism which is fixedly arranged on the gas distribution ring assembly and is suitable for driving the jaw assembly to move; the driving component comprises a gear component and a pneumatic component which are sleeved on the inner sleeve; the pneumatic assembly is communicated with an external air source through the air distribution ring assembly and drives the jaw assembly to move; a driven gear ring is coaxially and fixedly arranged on the gas distribution ring assembly; a shell arranged on the slewing bearing assembly is coaxially arranged outside the driven gear ring; the chuck also comprises a speed reducer which is matched with the driven gear ring and is arranged on the shell and is suitable for driving the driven gear ring to rotate. The utility model discloses effectively shorten air chuck's cutting tails, reduced chuck self inertia, improved the dustproof effect of chuck simultaneously greatly.

Description

Full-stroke hollow pneumatic chuck

Technical Field

The utility model relates to a laser cutting machine part, especially a full stroke cavity air chuck.

Background

Laser cutting is the most important application technology in the laser processing industry, and has the characteristics of high speed, high precision, no deformation of workpieces and the like, so that the laser cutting technology is widely applied to the fields of automobiles, rolling stock manufacturing, aviation, chemical engineering, light industry, electrical appliances, electronics, petroleum, metallurgy and the like. In recent years, laser cutting technology has developed rapidly, and the laser cutting technology has increased at a rate of 20% to 30% every year internationally. China has increased more than 25% per year since 1985. Because the laser industry foundation in China is poor, the application of the laser processing technology is not common, the overall level of laser processing is still far from the advanced state, and the obstacles and the defects are believed to be solved along with the continuous progress of the laser processing technology. The laser cutting technology is bound to become an important pipe processing means indispensable in the 21 st century. The wide application market of laser cutting processing and the rapid development of modern science and technology enable domestic and foreign science and technology workers to conduct continuous research on laser cutting processing technology, and the laser cutting technology is promoted to develop continuously forward.

Along with the increasing expansion of the market of laser pipe cutting machines, the use of pneumatic chucks is more and more, but the problems of long cutting tailings, large self inertia, poor dust prevention and the like generally exist in the pneumatic chucks used by laser whole machine factories at present, and a chuck with superior performance is urgently needed to replace a simple and crude chuck which cannot fully meet the cutting target at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a full stroke cavity air chuck effectively shortens air chuck's cutting tails, has reduced chuck self inertia, has improved the dustproof effect of chuck simultaneously greatly.

Realize the utility model discloses the technical scheme of purpose is:

a full-stroke hollow pneumatic chuck comprises a chuck body, an inner sleeve and a gas distribution ring assembly which are sequentially and fixedly connected along the axial direction of the chuck; the chuck body is made by the aluminum product, reduces greatly for general steel chuck weight, has reduced the inertia of chuck body, and cast aluminium processing cycle is short simultaneously, and production efficiency is fast, and through accurate aluminum casting, also can reduce the machining allowance, improves the output of chuck body. The front end of the chuck body is provided with a jaw assembly; the rear end of the chuck body is provided with a slewing bearing assembly sleeved on the inner sleeve; the chuck also comprises a driving mechanism which is arranged between the chuck body and the gas distribution ring assembly and is fixedly arranged on the gas distribution ring assembly; the driving mechanism comprises a gear assembly and a pneumatic assembly which are sleeved on the inner sleeve; the pneumatic assembly is communicated with an external air source through the air distribution ring assembly and is suitable for driving the jaw assembly to move; a driven gear ring is coaxially and fixedly arranged on the gas distribution ring assembly; a shell arranged on the slewing bearing assembly is coaxially arranged outside the driven gear ring; the chuck also comprises a speed reducer which is matched with the driven gear ring and is arranged on the shell and is suitable for driving the driven gear ring to rotate.

Further, the chuck body is equipped with the sliding part with jack catch subassembly matched with, the sliding part is equipped with the boss, boss both sides limit is equipped with the friction strip, the up end of friction strip is higher than the boss up end, avoids jack catch subassembly direct contact boss, reduces the sliding friction area of jack catch subassembly and chuck body, reduces frictional force, makes the jack catch subassembly remove more smoothly.

Further, the slewing bearing assembly comprises an integrated base and a slewing bearing, and the slewing bearing comprises a slewing bearing inner ring and a slewing bearing outer ring; the outer ring of the slewing bearing is coaxially and fixedly arranged on the base; the front end and the rear end of the inner ring of the slewing bearing are respectively fixedly connected with the chuck body and the gas distribution ring assembly.

Furthermore, an oil cup is arranged on the outer peripheral surface of the outer ring of the slewing bearing, so that lubricating oil can be automatically supplied conveniently, and the service life of the slewing bearing is prolonged.

Furthermore, the inner hole of the base is provided with a step, so that the slewing bearing can be conveniently positioned and installed.

Furthermore, a filtering device is fixedly arranged on the base.

Furthermore, the middle position of the bottom of the base is provided with a positioning key groove, so that the laser cutting machine is convenient to mount.

Furthermore, the two ends of the bottom of the base are symmetrically provided with the concave parts, so that the weight of the base is reduced, the material is saved, the casting quality can be improved, and the casting defects such as shrinkage cavities, sand holes and the like are avoided.

Further, the gas distribution ring assembly comprises a gas sealing disc, a sealing support ring and a sealing gland; the gas sealing disc is provided with a flange part which is fixedly arranged at the rear end of the inner ring of the slewing bearing; the sealing support ring is rotatably sleeved on the air sealing disc; the sealing gland is fixedly sleeved on the gas sealing disc; the flange part and the sealing gland are respectively arranged on two sides of the sealing support ring; the sealing gland is fixedly connected to the air sealing disc; and the peripheral surface of the sealing support ring is provided with an oil cup, an air inlet and an air outlet.

Furthermore, air channel grooves are formed in two sides of the sealing support ring, and rubber sealing rings are arranged in the air channel grooves; the rubber sealing ring is in axial clearance fit with the gas circuit groove; a plurality of air holes are uniformly distributed on the rubber sealing ring; the air sealing disc is provided with a first air passage communicated with the air passage groove on one side through the air hole; the sealing gland is provided with a second air passage communicated with the air passage groove on the other side through the air hole; the gas sealing disc is also provided with a third air passage communicated with the second air passage; and a limiting plate fixedly connected with the shell is arranged on the outer peripheral surface of the sealing support ring, so that the sealing support ring is prevented from rotating along with the machine tool spindle.

Furthermore, grooves are formed in two sides of the sealing support ring, balls are arranged in the grooves, a roller pin is arranged in an inner hole of the sealing support ring, friction force is small when the sealing support ring and the sealing gland and the air sealing disc rotate mutually, and the sealing support ring and the air sealing disc rotate more smoothly.

Further, the jaw assembly comprises two pairs of symmetrically arranged jaw mechanisms; the clamping jaw mechanism comprises a clamping jaw and a sliding block; one side of the sliding block is provided with a tooth groove.

Furthermore, pressing strips are arranged on two side edges of the sliding block; the pressing strip is made of 30Cr13 material; the pressing strip needs to be subjected to quenching and tempering and surface quenching, so that the pressing strip is more wear-resistant and has longer service life.

Furthermore, one side of the pressing strip, which is close to the sliding block, is provided with a groove, and a felt strip which is filled in the groove is arranged in the groove, so that the dustproof and sealing effects are achieved.

Furthermore, the clamping part of the clamping jaw is provided with a roller structure, so that the pipe can move smoothly and the surface of the pipe is not damaged in a continuous processing state.

Further, the gear assembly comprises an inner gear plate, an outer gear plate, a pair of first bridge gear assemblies and a pair of second bridge gear assemblies; a plurality of supporting pieces are uniformly and fixedly arranged at the rear end of the chuck body, and the first gap bridge gear assembly and the second gap bridge gear assembly are connected with the chuck body through the supporting pieces; the first bridge gear assembly comprises a first rotating shaft, a first gear and a second gear, wherein the first gear and the second gear are coaxially and fixedly arranged on the first rotating shaft and are respectively meshed with the inner fluted disc and the tooth grooves of the sliding blocks; the second bridge gear assembly comprises a second rotating shaft, and a third gear and a fourth gear which are coaxially and fixedly installed on the second rotating shaft, wherein the third gear and the fourth gear are respectively meshed with the tooth grooves of the outer fluted disc and the sliding block.

Furthermore, the inner fluted disc and the outer fluted disc are respectively sleeved on the inner sleeve, and rolling needles are arranged between the inner fluted disc and the inner sleeve and between the outer fluted disc and the inner sleeve, so that the friction force between the inner fluted disc and the inner sleeve is greatly reduced.

Furthermore, the outer peripheral surface of the inner sleeve and the roller pin which are in mutual friction contact is quenched, so that the service life of the inner sleeve is prolonged.

Furthermore, the front part of the inner sleeve is symmetrically provided with oil passages suitable for lubricating the roller pins along the circumferential direction, the front end of the chuck body is provided with oil holes communicated with the oil passages, and the lubricating oil can be directly supplied to the roller pins inside from the outside, so that later maintenance is facilitated.

Further, the pneumatic assembly comprises at least a first cylinder assembly and a second cylinder assembly; the first cylinder assembly comprises a first cylinder, a first mounting pin, a first connecting block, a first guide pin and a first side lug; the first cylinder is rotatably connected to the first mounting pin; one end of the first mounting pin is fixedly mounted on the air sealing disc, and the other end of the first mounting pin is fixedly mounted on the chuck body; the first guide pin is fixedly connected with the first cylinder through a first connecting block; one end of the first side lug is fixedly connected with the inner gear plate, and the other end of the first side lug is rotatably connected with the first guide pin; the second air cylinder assembly comprises a second air cylinder, a second mounting pin, a second connecting block, a second guide pin and a second side lug; the second cylinder is rotatably connected to the second mounting pin; one end of the second mounting pin is fixedly mounted on the air sealing disc, and the other end of the second mounting pin is fixedly mounted on the chuck body; the second guide pin is fixedly connected with the second air cylinder through a second connecting block; one end of the second side lug is fixedly connected with the outer fluted disc, and the other end of the second side lug is rotatably connected with the second guide pin.

Further, evenly be equipped with the arc through-hole the same with cylinder assembly quantity on the flange portion of gas seal dish, can hold a part of cylinder assembly, reduce the whole axial distance of chuck, further shorten air chuck's cutting tails, owing to exposed the cylinder assembly, make things convenient for the later maintenance simultaneously.

Further, the shell comprises a rear cover, a groove is formed in the inner ring of the rear cover, and a felt ring is arranged in the groove.

Furthermore, the rear cover is provided with an air inlet through hole and an air outlet through hole which are suitable for being respectively communicated with an air pipe of the air inlet and the air outlet on the sealing support ring.

Further, be equipped with proximity switch on the outer peripheral face of casing, be equipped with on the outer peripheral face of the flange portion of gas seal dish with proximity switch assorted bolt, but response chuck rotation angle is convenient for satisfy the processing demand that needs special rotation angle.

Further, the housing includes a reducer mounting portion; the speed reducer is arranged on the speed reducer mounting part; the shell is adjustably mounted on the outer ring of the slewing bearing.

Furthermore, threaded holes are uniformly distributed in the outer ring of the slewing bearing along the circumferential direction, and stepped holes corresponding to the threaded holes of the slewing bearing are formed in the shell removing speed reducer mounting part.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

1. the chuck of the utility model is sequentially and fixedly provided with a chuck body, an inner sleeve and a gas distribution ring component along the axial direction, and the rear end of the chuck body is provided with a slewing bearing component sleeved on the inner sleeve; the chuck is still including locating the drive mechanism of the cavity that chuck body, endotheca, distribution ring subassembly and slewing bearing subassembly formed and fixed mounting on the distribution ring subassembly, and this structural design makes the whole axial dimensions of chuck reduce, has effectively shortened pneumatic chuck's cutting tails.

2. The utility model discloses the chuck is equipped with the casing and installs the drive on the casing from driving wheel pivoted speed reducer, assembles the speed reducer in advance, and it is more convenient to use, and chuck body, slewing bearing subassembly and casing constitute a whole jointly simultaneously, effectively avoid inside gear assembly, pneumatic component, driven ring gear and speed reducer to expose, have improved the holistic dustproof effect of chuck greatly.

3. The utility model discloses the chuck body is made by the aluminum product, reduces greatly for general steel chuck weight, has reduced the inertia of the chuck body, and cast aluminium processing cycle is short simultaneously, and production efficiency is fast, and through accurate aluminum casting, also can reduce the machining allowance, improves the output of the chuck body.

4. The utility model discloses actuating mechanism includes pneumatic subassembly and pneumatic subassembly driven gear assembly, drives the motion of jack catch subassembly through gear drive, and the transmission is stable, and control is accurate, realizes that two liang of linkages of four jack catch mechanisms are from feeling relieved, the action of mutual noninterference again.

5. The utility model discloses slewing bearing subassembly includes the integral type base, and the structure is more stable, for split type structure, has saved the installation department, can effectively reduce the base height when more convenient, and then reduces the whole height of chuck, has solved the pipe sheet all-in-one walking crossbeam too high, and chuck inertia is big and the vibration that leads to, and then leads to the problem that machining precision is not good.

6. The utility model discloses be equipped with filter equipment, effectively filter the gaseous impurity in the pipeline, improve pneumatic component's life.

7. The utility model adopts the air inlet structure of the air distribution ring, and the chuck can not rotate when clamping the parts; after the parts are clamped, one-way pressure maintaining of the air path is realized through a check valve in an external air path, the pressure maintaining time can be more than 12 hours, and the influence of sudden air cut-off during product processing can be avoided.

8. The utility model discloses an inside and outside fluted disc drives the carrier gear respectively and rotates to the slider that the drive was equipped with the tooth's socket removes, through setting for the difference of two sections tooth numbers about the carrier gear, changes and rotates the different pitch circle girth of round realization, thereby realizes including the outer fluted disc rotates one section distance sliding block and removes longer distance, finally realizes that the jack catch full stroke removes, needn't adjust jack catch position, convenient to use.

9. The utility model discloses all be equipped with the kingpin between internal tooth dish, external tooth dish and the endotheca, frictional force is little during the rotation each other, rotates more smoothly.

10. The utility model discloses the back lid inner circle of casing is equipped with the recess, is equipped with the felt circle in the recess, because can take place relative rotation between back lid and the airtight sealed dish, the felt circle can increase the leakproofness of back lid, further improves the holistic dustproof effect of chuck.

11. The utility model discloses the casing is equipped with the speed reducer installation department, and the speed reducer is installed at the speed reducer installation department, detach the speed reducer installation department on the casing and be equipped with the step hole corresponding with the screw hole of slewing bearing outer lane outward, can realize the casing along the relative pivoted angle in slewing bearing outer lane through the quantity of setting for the screw hole to realize that the speed reducer position is adjustable, satisfy the installation demand of different pipe cutters, application scope is wider.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view at a.

Fig. 3 is a rear view of the present invention.

Fig. 4 is a cross-sectional view of fig. 3.

Fig. 5 is a partial enlarged view of the present invention C.

Fig. 6 is a partial enlarged view of the position D of the present invention.

Fig. 7 is a schematic structural view of the driving mechanism of the present invention.

Fig. 8 is a schematic view of the inner sleeve structure of the present invention.

The reference numbers in the drawings are:

the chuck comprises a chuck body 1, a sliding part 11, a boss 111, a friction strip 12, a support 13 and an oil hole 14;

an inner sleeve 2 and an oil path 21;

the gas distribution ring component 3, the gas sealing disc 31, the flange part 311, the first gas passage 312, the second gas passage 313, the arc through hole 314, the sealing support ring 32, the gas path groove 321, the rubber sealing ring 322, the sealing gland 33 and the third gas passage 331;

the clamping jaw assembly 4, the clamping jaw 41, the sliding block 42, the pressing strip 43, the felt strip 44 and the roller structure 45;

slewing bearing assembly 5, base 51, filtering device 511, positioning key groove 512, concave part 513, slewing bearing inner ring 52 and slewing bearing outer ring 53;

the gear assembly 6, the internal gear 61, the external gear 62, the first intermediate gear assembly 63, the first rotating shaft 631, the first gear 632, the second gear 633, the second intermediate gear assembly 64, the second rotating shaft 641, the third gear 642 and the fourth gear 643;

the pneumatic assembly 7, the first cylinder assembly 71, the first cylinder 711, the first mounting pin 712, the first connecting block 713, the first guide pin 714, the first side lug 715, the second cylinder assembly 72, the second cylinder 721, the second mounting pin 722, the second connecting block 723, the second guide pin 724, and the second side lug 725;

a driven ring gear 8;

the device comprises a shell 9, a rear cover 91, an air inlet through hole 911, an air outlet through hole 912, a felt ring 92, a speed reducer mounting part 93, a limit plate 94 and a proximity switch 95;

a speed reducer 10.

Detailed Description

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Referring to fig. 1 to 8, the full-stroke air chuck of the present embodiment includes a chuck body 1, an inner sleeve 2 and a gas distribution ring assembly 3, which are fixedly connected in sequence along an axial direction of the chuck; the chuck body 1 adopts an aluminum casting; the front end of the chuck body 1 is provided with a jaw component 4; the rear end of the chuck body 1 is provided with a slewing bearing assembly 5 which is sleeved on the inner sleeve 2; chuck body 1 is equipped with the sliding part 11 with jaw assembly 4 matched with, and sliding part 11 is equipped with boss 111, and boss 111 both sides limit is equipped with rubbing strip 12, and the up end of rubbing strip 12 is higher than the up end of boss 111, avoids jaw assembly 4 direct contact boss 111, reduces jaw assembly 4 and chuck body 1's sliding friction area, reduces frictional force, makes jaw assembly 4 remove more smoothly. The inner sleeve 2 is a 45-steel forged piece, and compared with a forged piece which is generally made of a steel plate, the forged piece is excellent in performance.

The chuck also comprises a driving mechanism which is arranged in a cavity formed by the chuck body 1, the inner sleeve 2, the gas distribution ring component 3 and the rotary support component 5 and is fixedly arranged on the gas distribution ring component 3. A gas inlet structure of a gas distribution ring is adopted, so that a chuck cannot rotate when a part is clamped; after the parts are clamped, one-way pressure maintaining of the air path is realized through a check valve in an external air path, the pressure maintaining time can be more than 12 hours, and the influence of sudden air cut-off during product processing can be avoided. The driving mechanism is suitable for driving the jaw assembly 4 to move, comprises a gear assembly 6 and a pneumatic assembly 7 which are sleeved on the inner sleeve 2, drives the jaw assembly 4 to move through gear transmission, is stable in transmission and accurate in control, and realizes the self-centering of pairwise linkage of the four jaw mechanisms without mutual interference. This structural design makes the whole axial dimensions of chuck reduce, has effectively shortened air chuck's cutting tails. The gas distribution ring component 3 is respectively communicated with an external gas source and a pneumatic component 7; a driven gear ring 8 is coaxially and fixedly arranged on the gas distribution ring component 3; a shell 9 arranged on the slewing bearing assembly 5 is coaxially arranged outside the driven gear ring 8; the chuck also comprises a reducer 10 cooperating with the driven ring gear 8 and mounted on the casing 9 and suitable for driving the driven ring gear 8 in rotation. This embodiment assembles speed reducer 10 in advance, and it is more convenient to use, and chuck body 1, slewing bearing subassembly 5 and casing 9 constitute a whole jointly simultaneously, effectively avoid inside gear assembly 6, pneumatic component 7, driven ring gear 8 and speed reducer 10 to expose, have improved the holistic dustproof effect of chuck greatly.

Slewing bearing assembly 5 includes integral base 51 and slewing bearing, and slewing bearing includes slewing bearing inner circle 52 and slewing bearing outer circle 53. Base 51 formula as an organic whole, the structure is more stable, for split type structure, has saved the installation department, can effectively reduce the base height when more convenient, and then reduce the whole height of chuck, has solved the pipe sheet all-in-one walking crossbeam too high, chuck inertia is big and the vibration that leads to, and then leads to the not good problem of machining precision. The outer ring 53 of the slewing bearing is coaxially and fixedly arranged on the base 51; the inner ring 52 of the rotary support is coaxially and fixedly arranged at the rear end of the chuck body 1. The outer peripheral surface of the outer ring 53 of the slewing bearing is provided with an oil cup, so that lubricating oil can be conveniently and automatically supplied, and the service life of the slewing bearing is prolonged. The hole of base 51 is equipped with the step, and the fixed filter equipment 511 that is equipped with on the right side of slewing bearing's location installation base 51 of being convenient for effectively filters the gaseous impurity in the pipeline, improves pneumatic component 7's life. The middle position of the bottom of the base 51 is provided with a positioning key slot 512, which is convenient for installation with a laser cutting machine. The bottom of the base 51 is symmetrically provided with the concave parts 513 at two sides of the positioning key groove 512, so that the weight of the base is reduced, the material is saved, the casting quality can be improved, and the casting defects such as shrinkage cavities, sand holes and the like are avoided.

The gas distribution ring component 3 comprises a gas sealing disc 31, a sealing support ring 32 and a sealing gland 33; the front part of the air sealing disc 31 is provided with a flange part 311, and the flange part 311 is fixedly arranged on the inner slewing bearing ring 52 through screws; the sealing support ring 32 and the sealing gland 33 are sequentially sleeved on the air sealing disc 31; the flange portion 311 and the seal gland 33 are respectively provided on both sides of the seal support ring 32; the sealing gland 33 is fixedly connected to the air sealing disc 31; an oil cup, an air inlet and an air outlet are arranged on the outer peripheral surface of the sealing support ring 32. Air passage grooves 321 are formed in two sides of the sealing support ring 32, and rubber sealing rings 322 are arranged in the air passage grooves 321; eight air holes are uniformly distributed on the rubber sealing ring 322; rubber seal 322 and gas circuit groove 321 axial clearance fit, if when left side gas circuit groove 321 admits air, rubber seal 322 removes left along gas circuit groove 321 in atmospheric pressure effect to closely laminate with the flange portion 311 of the left gas seal dish 31 of seal support ring 32, realize sealed function, thereby guarantee the leakproofness of gas circuit switching-over. The flange part 311 of the air sealing disc 31 is provided with a first air passage 312 communicated with the left air passage groove 321 through an air hole; the sealing gland 33 is provided with a third air passage 331 which is communicated with the right air passage groove 321 through an air hole; the air sealing disc 31 is provided with a second air passage 313 communicated with the third air passage 331; the outer peripheral surface of the seal support ring 32 is provided with a limit plate 94 fixedly connected with the housing 9, so that the seal support ring 32 is prevented from rotating along with the machine tool spindle. The two sides of the sealing support ring 32 are provided with grooves, balls are arranged in the grooves, the inner hole of the sealing support ring 32 is provided with a roller pin, friction force is small when the sealing support ring 32 and the sealing gland 33 and the air sealing disc 31 rotate mutually, and rotation is smooth. Evenly be equipped with the same arc through-hole 314 with cylinder assembly 7 quantity on the flange portion 311 of gas seal dish 31, can hold cylinder assembly's partly, reduce the whole axial distance of chuck, further shorten air chuck's cutting tails, owing to exposed cylinder assembly 7, make things convenient for later maintenance simultaneously.

The jaw assembly 4 comprises two pairs of jaw mechanisms which are symmetrically arranged; the jaw mechanism comprises a jaw 41 and a sliding block 42; one side of the sliding block 42 is provided with a tooth groove. Two sides of the sliding block 42 are provided with pressing strips 43, so that the sliding block 42 is limited to move along the radial direction of the chuck; the pressing strip 43 is made of 30Cr 13; the pressing strip 43 needs to be subjected to quenching and tempering and surface quenching, so that the pressing strip is more wear-resistant and has a longer service life. One side of the pressing strip 43 close to the sliding block 42 is provided with a groove, and a felt strip 44 filling the groove is arranged in the groove, so that the dustproof and sealing effects are achieved. The clamping part of the clamping jaw 41 is provided with a roller structure 45, so that the pipe can move smoothly and the surface of the pipe is not damaged in a continuous processing state.

The gear assembly 6 comprises an inner toothed disc 61, an outer toothed disc 62, a pair of first carrier gear assemblies 63 and a pair of second carrier gear assemblies 64; four supporting pieces 13 are uniformly and fixedly arranged at the rear end of the chuck body 1, and the first gap bridge gear assembly 63 and the second gap bridge gear assembly 64 are connected with the chuck body 1 through the supporting pieces 13; the first bridge gear assembly 63 includes a first rotating shaft 631, and a first gear 632 and a second gear 633 coaxially and fixedly mounted on the first rotating shaft 631, the first gear 632 and the second gear 633 respectively mesh with the internal gear 61 and the tooth grooves of the sliding block 42; the second carrier gear assembly 64 includes a second shaft 641, and a third gear 642 and a fourth gear 643 coaxially and fixedly mounted on the second shaft 641, wherein the third gear 642 and the fourth gear 643 are respectively engaged with the tooth grooves of the outer toothed disc 62 and the sliding block 42. This embodiment drives the carrier gear rotation respectively through inside and outside ring gear to the sliding block 42 that the drive was equipped with the tooth's socket removes, through setting for the difference of two sections tooth number about the carrier gear, changes and rotates the different pitch circle girth of round realization, thereby realizes including outer fluted disc rotates one section distance sliding block and removes longer distance, finally realizes that the jack catch full stroke removes, realizes jack catch 41 full stroke design, needn't adjust the position of jack catch 41, convenient to use. The inner fluted disc 61 and the outer fluted disc 62 are respectively sleeved on the inner sleeve 2, rolling needles are respectively arranged between the inner fluted disc 61 and the inner sleeve 2 as well as between the outer fluted disc 62 and the inner sleeve 2, so that the friction force between the inner and outer fluted discs and the inner sleeve 2 is greatly reduced, and the friction force is small during mutual rotation, so that the rotation is smoother. The outer peripheral surface of the inner sleeve 2 in mutual frictional contact with the roller pin is quenched, so that the service life of the inner sleeve 2 is prolonged. The front part of the inner sleeve 2 is symmetrically provided with oil passages 21 suitable for lubricating the roller pins along the circumferential direction, the front end of the chuck body 1 is provided with oil holes 14 communicated with the oil passages 21, and the lubricating oil can be directly supplied to the roller pins in the chuck body from the outside, so that later maintenance is facilitated.

The pneumatic assembly 7 comprises two first cylinder assemblies 71 and two second cylinder assemblies 72; the first cylinder assembly 71 includes a first cylinder 711, a first mounting pin 712, a first connecting block 713, a first guide pin 714, and a first side ear 715; the first cylinder 711 is rotatably connected to the first mounting pin 712; the first mounting pin 712 is fixedly mounted on the air sealing disc 31; the first guide pin 714 is fixedly connected with the first cylinder 711 through a first connecting block 713; one end of the first side lug 715 is fixedly connected with the inner toothed disc 61, and the other end is rotatably connected with the first guide pin 714; the second cylinder assembly 72 includes a second cylinder 721, a second mounting pin 722, a second connecting block 723, a second guide pin 724, and a second side lug 725; the second cylinder 721 is rotatably connected to the second mounting pin 722; the second mounting pin 722 is fixedly mounted on the air sealing disc 31; the second guide pin 724 is fixedly connected with the second air cylinder 721 through a second connecting block 723; one end of the second side lug 725 is fixedly connected to the external toothed disc 62, and the other end is rotatably connected to the second guide pin 724.

The driven gear ring 8 is made of 40Cr forgings, and the chemical components and the mechanical properties meet the requirements of GB/T3077-2015. The steel ingot is refined outside a vacuum degassing furnace, the forging requirement of the forge piece is executed according to JB/T5000.8-2007 'heavy machinery general technical condition forge piece' IV grade requirement, the forging ratio is more than 3, and compared with a plate adopted in the traditional process, the forge piece adopted in the embodiment has excellent performance; the forging piece is subjected to a pretreatment mode of normalizing and high-temperature tempering, wherein the normalizing temperature is 890-910 ℃, the temperature is kept for 6-8 hours, and the forging piece is subjected to air cooling; the high-temperature tempering temperature is 560-600 ℃, the heat preservation is carried out for 6-8 h, and the hardness is 180-220 HBS. In the embodiment, the normalizing temperature is preferably 900 ℃, the heat preservation time is 7 hours, the high-temperature tempering temperature is preferably 580 ℃, and the heat preservation time is 7 hours. The chemical composition, the nonmetallic inclusion, the grain size and the mechanical property of the alloy are inspected, and the chemical composition meets the requirements of GB/T3077-2015 standard; c, carbon C: 0.38-0.45%, Si: 0.17-0.37%, Mn: 0.50-0.80%, S: allowable residual content is less than or equal to 0.035%, phosphorus P: allowable residual content is less than or equal to 0.035%, Cr: 0.90-1.20%, Ni: allowable residual content is less than or equal to 0.30%, Cu: allowable residual content is less than or equal to 0.30%, molybdenum Mo: 0.15 to 0.25 percent. The nonmetallic inclusion meets the GB/T10561-2005 standard requirement; the class A, the class B, the class C, the class D and the class DS are not more than 2.5. The grain size meets the requirement of GB/T6934-2002 standard, and the grain size is not less than 6 grade. The mechanical property meets the requirement of GB/T3077-2015 standard; the tensile strength is more than or equal to 1080Mpa, the yield strength is more than or equal to 930Mpa, and the elongation after fracture is more than or equal to 12 percent; the reduction of area is more than or equal to 45 percent, and the impact absorption energy is more than or equal to 63J. Then ultrasonic flaw detection is carried out according to the requirements of JB/T5000.15-2007 No. II requirements of nondestructive flaw detection of forged steel parts under general technical conditions of heavy machinery. After semi-finish turning, performing quenching and tempering treatment, wherein the allowance of each excircle, each inner hole and each end face is 6-8 mm, and the hardness is 240 plus 280 HBS; finely turning a first part, wherein the allowance of the excircle and the inner hole with tolerance is 0.8-1.0 mm, and the allowance of the surface with tolerance in thickness is 0.4-0.5 mm; hobbing, and keeping the allowance of a common normal line at 0.5-0.6 mm; performing induction quenching on the tooth surface, wherein the hardness of the tooth surface is 45-50 HRC, the effective hardening layer depth is 0.4-0.6 mm, and the process layer depth is 0.8-1.0 mm; finish turning the second workpiece, wherein the allowance of each tolerance inner hole is 0.3-0.4 mm, the allowance of each tolerance surface is 0.15-0.2 mm, and each hole is drilled and tapped to form a finished product; plane grinding and inner circle grinding, namely positioning and grinding a non-base surface by using a reference end surface, turning over and grinding the reference surface, ensuring the size and form and position tolerance, positioning by using the reference end surface, aligning the jump of an inner hole to be less than or equal to 0.02, and grinding the inner hole to a finished product; and finally, grinding the teeth, namely grinding the common normal line of the numerically-controlled forming gear grinding machine with the upper inlet to a finished product. Because the driven gear ring 8 has large outer diameter, large inner hole, thin thickness, large processing deformation and high precision grade of the tooth part, the traditional process is adopted, namely after thermal refining, the gear is directly finished by finish turning, drilling and tapping, gear hobbing and induction quenching to be processed into a finished product, the gear grinding adopts a domestic gear grinding machine, the rejection rate is high, and the rejection rate is greatly reduced while the product quality is ensured by adopting the process.

The casing 9 comprises a rear cover 91, a groove is formed in the inner ring of the rear cover 91, a felt ring 92 is arranged in the groove, relative rotation can occur between the rear cover 91 and the air sealing disc 31, the felt ring 92 can increase the sealing performance of the rear cover 91, and the overall dustproof effect of the chuck is further improved. The rear cover 91 is provided with an air inlet through hole 911 and an air outlet through hole 912 adapted to communicate with the air inlet and the air outlet 323 on the seal support ring 32, respectively. The outer peripheral surface of the shell 9 is provided with a proximity switch 95, and the outer peripheral surface of the flange part 311 of the air sealing disc 31 is provided with a bolt matched with the proximity switch 95, so that the rotation angle of the chuck can be sensed, and the processing requirement of needing a special rotation angle can be met conveniently. The housing 9 further includes a reducer mounting portion 93; the speed reducer 10 is mounted on the speed reducer mounting part 93; 16 screw holes of slewing bearing outer lane 53 along circumference equipartition, because speed reducer installation department 93 has just in time covered 2 the processing position that corresponds with the screw hole, therefore be equipped with 14 step holes corresponding with the screw hole of slewing bearing outer lane 53 on the casing 9, the angle between two adjacent screw holes is 22.5, can realize casing 9 and rotate along slewing bearing outer lane 53 relatively, thereby it is adjustable to realize speed reducer 10 position, speed reducer 10 is 22.5 integral multiples for the rotatable angle of main shaft, satisfy different pipe cutting machine's installation demand, application scope is wider.

The utility model discloses a theory of operation: when air is fed, an air inlet pipe of an external air source enters the left air channel groove 321 through the air inlet through hole 911 on the rear cover 91 and the air inlet of the sealing support ring 32, and is communicated with four air cylinders through air pipes along the first air channel 312, so that power is provided for the air cylinders to move; during air exhaust, the air cylinder is communicated with the second air passage 313 through an air pipe, enters the right air passage groove 321 of the sealing support ring 32 through the third air passage 313 and the second air passage 331 of the sealing gland 33, is communicated with an external air source air pipe through an air outlet, and is communicated with the outside from the air outlet through hole 912 on the rear cover 91. It should be noted that the air inlet and the air outlet are opposite, air can enter from the air inlet and also can enter from the air outlet, so that the reciprocating motion of the air cylinder is realized, and the reversing of the air flow is controlled by an electromagnetic valve of an external air passage.

When the chuck is mounted on a laser cutting machine, the reduction gear 10 rotates the driven ring gear 8, thereby rotating the pneumatic seal disk 31, the inner slewing bearing ring 51, the inner sleeve 2, and the chuck body 1. When the part is clamped, the chuck does not rotate, and the two first cylinders are symmetrically arranged along the axial direction of the chuck. The first cylinder 711 drives the first guide pin 714 to move so as to drive the internal gear disc 61 fixedly connected with the first side lug 715 to rotate, the internal gear disc 61 drives the first gear 632 of the first bridge gear assembly 63 to rotate, and then drives the second gear 633 coaxially and fixedly installed on the first rotating shaft 631 with the first gear 632 to rotate, so as to drive the sliding block 42 to slide along the sliding portion 11 of the chuck body 1, and thus the movement of the pair of jaw mechanisms is realized; similarly, the second cylinder 721 drives the second guide pin 724 to move so as to drive the external toothed disc 62 to rotate, and the second bridge gear assembly 64 drives the sliding blocks 42 of the other pair of jaw assemblies to move, so that the other pair of jaw mechanisms move, and the part is clamped. By adopting the structure, the different pitch circle circumferences are realized by changing the rotation circle through setting the difference of the tooth numbers of the upper section of the gear and the lower section of the carrier gear, so that the inner fluted disc and the outer fluted disc rotate for a distance, the sliding block moves for a longer distance, the full-stroke movement of the clamping jaw is finally realized, the full-stroke design of the clamping jaw mechanism can be realized, the position of the clamping jaw mechanism does not need to be adjusted, and the use is convenient.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a full stroke air chuck which characterized in that: comprises a chuck body (1), an inner sleeve (2) and a gas distribution ring component (3) which are fixedly connected in sequence along the axial direction of the chuck; the chuck body (1) is made of aluminum; the front end of the chuck body (1) is provided with a jaw component (4); the rear end of the chuck body (1) is provided with a slewing bearing assembly (5) sleeved on the inner sleeve (2); the chuck also comprises a driving mechanism which is arranged between the chuck body (1) and the gas distribution ring assembly (3) and is fixedly arranged on the gas distribution ring assembly (3); the driving mechanism comprises a gear assembly (6) and a pneumatic assembly (7) which are sleeved on the inner sleeve (2); the pneumatic assembly (7) is communicated with an external air source through the air distribution ring assembly (3) and is suitable for driving the jaw assembly (4) to move; a driven gear ring (8) is coaxially and fixedly arranged on the gas distribution ring assembly (3); a shell (9) arranged on the slewing bearing assembly (5) is coaxially arranged outside the driven gear ring (8); the chuck also comprises a speed reducer (10) which is matched with the driven gear ring (8) and is arranged on the shell (9) and is suitable for driving the driven gear ring (8) to rotate.

2. The full-stroke air chuck as set forth in claim 1, wherein: the slewing bearing assembly (5) comprises an integrated base (51) and a slewing bearing, and the slewing bearing comprises a slewing bearing inner ring (52) and a slewing bearing outer ring (53); the slewing bearing outer ring (53) is coaxially and fixedly arranged on the base (51); the front end and the rear end of the slewing bearing inner ring (52) are respectively fixedly connected with the chuck body (1) and the gas distribution ring assembly (3).

3. The full-stroke air chuck as set forth in claim 2, wherein: and a filtering device (54) is fixedly arranged on the base (51).

4. The full-stroke air chuck as set forth in claim 1, wherein: the gas distribution ring assembly (3) comprises a gas sealing disc (31), a sealing support ring (32) and a sealing gland (33); the gas sealing disc (31) is provided with a flange part (311), and the flange part (311) is fixedly arranged at the rear end of the rotary support inner ring (52); the sealing support ring (32) is rotatably sleeved on the air sealing disc (31); the sealing gland (33) is fixedly sleeved on the gas sealing disc (31); the flange part (311) and the sealing gland (33) are respectively arranged on two sides of the sealing support ring (32); an oil cup, an air inlet and an air outlet are arranged on the outer peripheral surface of the sealing support ring (32).

5. The full-stroke air chuck as set forth in claim 4, wherein: the jaw assembly (4) comprises two pairs of jaw mechanisms which are symmetrically arranged; the jaw mechanism comprises a jaw (41) and a sliding block (42); one side of the sliding block (42) is provided with a tooth groove.

6. The full-stroke air chuck as set forth in claim 5, wherein: the gear assembly (6) comprises an inner gear disc (61), an outer gear disc (62), a pair of first bridge gear assemblies (63) and a pair of second bridge gear assemblies (64); a plurality of supporting pieces (13) are uniformly and fixedly arranged at the rear end of the chuck body (1), and the first gap bridge gear assembly (63) and the second gap bridge gear assembly (64) are connected with the chuck body (1) through the supporting pieces (13); the first bridge gear assembly (63) comprises a first rotating shaft (631) and a first gear (632) and a second gear (633) which are coaxially and fixedly installed on the first rotating shaft (631), and the first gear (632) and the second gear (633) are respectively meshed with tooth grooves of the inner tooth disc (61) and the sliding block (42); the second bridge gear assembly (64) comprises a second rotating shaft (641) and a third gear (642) and a fourth gear (643) which are coaxially and fixedly installed on the second rotating shaft (641), wherein the third gear (642) and the fourth gear (643) are respectively meshed with the tooth grooves of the outer tooth disc (62) and the sliding block (42).

7. The full-stroke air chuck as set forth in claim 6, wherein: the inner toothed disc (61) and the outer toothed disc (62) are respectively sleeved on the inner sleeve (2), and rolling needles are arranged between the inner toothed disc (61) and the inner sleeve (2) and between the outer toothed disc (62) and the inner sleeve (2).

8. The full-stroke air chuck as set forth in claim 6, wherein: the pneumatic assembly (7) comprises at least one first cylinder assembly (71) and at least one second cylinder assembly (72); the first cylinder assembly (71) comprises a first cylinder (711), a first mounting pin (712), a first connecting block (713), a first guide pin (714), and a first side ear (715); the first cylinder (711) is rotatably connected to the first mounting pin (712); one end of the first mounting pin (712) is fixedly mounted on the air sealing disc (31), and the other end of the first mounting pin is fixedly mounted on the chuck body (1); the first guide pin (714) is fixedly connected with the first air cylinder (711) through a first connecting block (713); one end of the first side lug (715) is fixedly connected with the inner fluted disc (61), and the other end of the first side lug is rotatably connected with the first guide pin (714); the second cylinder assembly (72) comprises a second cylinder (721), a second mounting pin (722), a second connecting block (723), a second guide pin (724) and a second lug (725); the second air cylinder (721) is rotatably connected to a second mounting pin (722); one end of the second mounting pin (722) is fixedly mounted on the air sealing disc (31), and the other end of the second mounting pin is fixedly mounted on the chuck body (1); the second guide pin (724) is fixedly connected with the second air cylinder (721) through a second connecting block (723); one end of the second side lug (725) is fixedly connected with the outer fluted disc (62), and the other end of the second side lug is rotatably connected with the second guide pin (724).

9. The full-stroke air chuck as set forth in claim 1, wherein: the shell (9) comprises a rear cover (91), a groove is formed in the inner ring of the rear cover (91), and a felt ring (92) is arranged in the groove.

10. The full-stroke air chuck as set forth in claim 1, wherein: the housing (9) includes a speed reducer mounting portion (93); the speed reducer (10) is mounted on the speed reducer mounting part (93); the shell (9) is adjustably mounted on the slewing bearing outer ring (53).

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