CN214641010U

CN214641010U - Automatic nozzle changing device

Info

Publication number: CN214641010U
Application number: CN202120324560.8U
Authority: CN
Inventors: 李正; 林晋学; 徐侠
Original assignee: Penta Laser Wenzhou Co ltd
Current assignee: Pentium Laser Zhejiang Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-11-09
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses an automatic trade nozzle device, its technical scheme main points are including mounting panel and actuating mechanism, one side of mounting panel is provided with the nozzle storehouse, and actuating mechanism can drive the nozzle storehouse and rotate, is provided with the chamber that holds the nozzle in the nozzle storehouse, and the up end in nozzle storehouse is provided with can with hold the annular that the chamber is linked together, and the annular is built-in to have the annular plate, and the nozzle storehouse is built-in to have locking Assembly, when the annular plate moves towards the annular, can drive locking Assembly and press from both sides tightly the nozzle that holds the intracavity, the utility model discloses a mechanical structure's mode has solved and has changed the nozzle operation danger, and the long machining efficiency who leads to consuming time descends the scheduling problem.

Description

Automatic nozzle changing device

Technical Field

The utility model relates to a laser cutting technical field, more specifically say, it relates to automatic trade nozzle device.

Background

As a novel thermal cutting technology, laser cutting has the advantages of high cutting speed, high production efficiency, good quality of a cut end face, small heat affected zone, environmental protection and the like, has become one of the main metal plate cutting modes, and is increasingly widely applied.

The principle of laser cutting is that a light beam is focused into a very small focus through a lens of a cutting head, so that the focus reaches high power density, the material on a worktable is vaporized or melted, and meanwhile, a high-speed airflow is blown out of the melted and vaporized material from the coaxial or non-coaxial side through a nozzle to form a hole for material cutting. The hole is then formed into a continuous slit of narrow width by moving the cutting head so that there is relative movement between the focal point and the material.

The cutting of completion material in the production course of working panel such as different thickness, material, must change the nozzle of not unidimensional sharp mouth and external diameter according to the demand, install on the laser cutting head through threaded connection after the change, just can realize normal work. In the prior art, manual replacement and the like are often adopted, however, a laser cutting head of the laser cutting machine is generally positioned in a processing area on a workbench, and therefore, it is very dangerous to manually replace a nozzle of the laser cutting machine in the operation of the machine. For safety of operators, the equipment must be shut down when the nozzle is replaced, and the replacement operation is performed after cooling, but a certain amount of time is consumed when the equipment is shut down or cooling is performed, which causes a reduction in the efficiency of the production process.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a can change the nozzle safely, improve production efficiency's laser cutting machine's automation and trade nozzle device.

In order to achieve the above purpose, the utility model provides a following technical scheme: automatic trade nozzle device, including mounting panel and actuating mechanism, one side of mounting panel is provided with the nozzle storehouse, actuating mechanism can drive the nozzle storehouse and rotate, be provided with the chamber that holds the nozzle in the nozzle storehouse, the up end in nozzle storehouse is provided with can with hold the annular that the chamber is linked together, the annular is built-in to have the crown plate, the nozzle storehouse is built-in to have locking Assembly, when the crown plate moves towards the annular, can drive locking Assembly and press from both sides tightly the nozzle that holds the intracavity.

The utility model discloses further set up to: the number of the locking assemblies is two, and the locking assemblies are symmetrically arranged along the axial lead of the nozzle bin.

The utility model discloses further set up to: every locking Assembly is including being located the second wedge of annular, the up end and the annular plate fixed connection of second wedge, the lower terminal surface of second wedge be provided with can with the first wedge of second wedge matched with, be provided with the intercommunication groove that can supply the second wedge to wear out on the inner wall in nozzle storehouse, it is linked together through intercommunication groove and annular to hold the chamber.

The utility model discloses further set up to: and a locking spring is arranged in the communication groove in a penetrating manner, one end of the locking spring is fixedly connected with the first wedge-shaped block, and the other end of the locking spring is fixedly connected with a clamping plate capable of clamping the nozzle. And a return spring is arranged between the first wedge-shaped block and the inner wall of the annular groove.

The utility model discloses further set up to: the annular plate upper end is provided with magnet, is provided with on the laser cutting head can with magnet matched with iron set, when the appeal between magnet and iron set is greater than the frictional force between annular plate and the annular, magnet drives annular plate and second wedge and rises.

The utility model discloses further set up to: be provided with the transmission shaft between nozzle storehouse and the actuating mechanism, be provided with the safeties that can avoid causing the nozzle to damage on the transmission shaft, safeties is including torsional spring and commentaries on classics tooth, torsional spring and commentaries on classics tooth are located on the transmission shaft between nozzle storehouse and the mounting panel, the torsional spring both ends link to each other with nozzle storehouse and commentaries on classics tooth respectively, the outside of transmission shaft is located to the commentaries on classics tooth cover, the one end that changes the tooth and be close to the mounting panel is provided with the first arch of a plurality of, the transmission shaft is provided with the second arch of a plurality of and first protruding meshing mutually along the circumferencial direction, first arch is the same with the protruding quantity of second.

The utility model discloses further set up to: actuating mechanism is including the motor, the motor is located the bottom of mounting panel, be provided with the drive shaft on the motor output, the bearing is connected between drive shaft and the mounting panel, the one end that the drive shaft passed the mounting panel is provided with drive gear, the key-type connection between drive gear and the drive shaft, drive gear one end meshing is provided with two drive gear, every drive gear all with the transmission shaft between the key-type connection, every the bearing is connected between transmission shaft and the mounting panel, every drive gear accessible transmission shaft drives a nozzle storehouse syntropy and rotates.

The utility model discloses further set up to: and a sinking platform is also arranged in the nozzle bin.

The utility model discloses further set up to: an annular buffer inclined plane with a large upper part and a small lower part is arranged between the bottom of the sinking platform and the inner wall of the accommodating cavity.

The utility model discloses further set up to: the transmission gears are symmetrical left and right by taking the driving gear as a center.

To sum up, the utility model discloses following beneficial effect has: the nozzle is placed in the nozzle bin, a step circle is formed on the bottom surface of the sinking platform and the cavity wall of the accommodating cavity through the arrangement of the sinking platform and the accommodating cavity, the sharp mouth of the nozzle extends into the cavity wall of the accommodating cavity while the outer diameter of the nozzle is abutted against the bottom surface of the sinking platform, the contact area with each part of the nozzle is increased, the nozzle is preliminarily clamped, when the nozzle bin rotates, the nozzle can be effectively driven to synchronously rotate with the nozzle bin by utilizing the friction force between the step circle and the nozzle, the clamping of the nozzle is realized under the action of the locking spring through the arrangement of the clamping plate, when the nozzle is installed, the nozzle is placed in the nozzle bin to be in contact clamping with the sinking platform and the accommodating cavity, the annular plate is pressed downwards, the elastic force of the reset spring is smaller than the friction force between the annular plate and the annular groove, the first wedge block moves towards the end face of the communicating groove, the clamping plate is driven by the locking spring to clamp the nozzle, and the motor rotates forwards, drive gear and motor syntropy are rotatory, and drive gear rotates with drive gear meshing simultaneously, and drive gear is the antiport, and the nozzle storehouse is rotatory to be carried out the nozzle installation, and the installation is accomplished the back, lifting annular plate, and reset spring drives first wedge and resets, removes the locking to the nozzle, dismantles the reversal of process motor, realizes the dismantlement to the nozzle, realizes the automatic change of nozzle, improves production efficiency, protection operating personnel's safety.

Drawings

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

FIG. 2 is a schematic view of the structure of FIG. 1 with the mounting plate, drive gear and motor removed;

FIG. 3 is a schematic view of the structure of FIG. 2 in another state;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

fig. 5 is a schematic sectional structure view of the nozzle cartridge of fig. 4.

Reference numerals: 1. mounting a plate; 11. a motor; 12. a drive shaft; 13. a drive gear; 2. a transmission gear; 3. a drive shaft; 31. a second protrusion; 4. a nozzle bin; 41. an accommodating chamber; 42. sinking a platform; 421. a communicating groove; 43. a ring groove; 431. an annular plate; 44. a splint; 45. a locking spring; 46. a return spring; 47. a first wedge block; 48. a second wedge block; 5. a magnet; 6. a torsion spring; 7. rotating the teeth; 71. a first protrusion; 8. annular buffering inclined plane.

Detailed Description

As shown with reference to figures 1 to 5,

automatic trade nozzle device, including mounting panel 1 and actuating mechanism, one side of mounting panel 1 is provided with nozzle storehouse 4, actuating mechanism can drive nozzle storehouse 4 and rotate, be provided with the chamber 41 that holds the nozzle in the nozzle storehouse 4, the up end of nozzle storehouse 4 is provided with can with hold the annular 43 that the chamber 41 is linked together, annular 43 embeds there is annular 431, nozzle storehouse 4 embeds there is locking Assembly, when annular 431 removes towards annular 43, can drive locking Assembly and press from both sides tightly holding the nozzle in the chamber 41.

When using the original nozzle of change nozzle assembly on this application to the laser cutting head to take off, then only need to hold chamber 41 and aim at former nozzle, and then remove annular plate 431 towards annular 43 in to the drive locking assembly presss from both sides tightly holding the former nozzle in the chamber 41. At this moment, actuating mechanism starts and then drives nozzle storehouse 4 and rotates, and then carries out synchronous rotation to the former nozzle on the laser cutting head through locking Assembly to realize that former nozzle is from laser cutting head department spiral shell rotation play.

When the nozzle needs to be replaced to other types or sizes, the operations are carried out in the reverse direction, and the replacement of the nozzle can be realized. When the scheme is adopted to replace the nozzle, the replacement operation is not required after the nozzle is cooled, so that the production efficiency can be improved.

Further, the number of the locking devices is two, and the locking devices are symmetrically arranged along the axis of the nozzle bin 4. As the annular plate 431 moves toward the annular groove 43, two locking assemblies can be actuated to simultaneously clamp the nozzle in the receiving chamber 41.

Further, each locking assembly comprises a second wedge block 48 positioned in the annular groove 43, the upper end surface of the second wedge block 48 is fixedly connected with the annular plate 431, and the lower end surface of the second wedge block 48 is provided with a first wedge block 47 which can be matched with the second wedge block 48, specifically: the inclined surface of the second wedge-shaped block 48 is in fit with the inclined surface of the first wedge-shaped block 47. The inner wall of the nozzle bin 4 is provided with a communicating groove 421 for the second wedge-shaped block 48 to penetrate out, and the accommodating cavity 41 is communicated with the annular groove 43 through the communicating groove 421.

The communicating groove 421 is provided with a locking spring 45 in a penetrating manner, one end of the locking spring 45 is fixedly connected with the first wedge-shaped block 47, and the other end of the locking spring 45 is fixedly connected with a clamping plate 44 capable of clamping the nozzle. A return spring 46 is arranged between the first wedge block 47 and the inner wall of the annular groove 43.

When using the original nozzle of change nozzle assembly on to the laser cutting head of this application to take off, then only need will hold chamber 41 and aim at former nozzle, and then remove annular plate 431 towards annular groove 43 in, thereby drive second wedge 48 and extrude first wedge 47 downwards, because be the inclined plane cooperation between second wedge 48 and the first wedge 47, make first wedge 47 wear out along intercommunication groove 421 opening direction, thereby shorten the interval between first wedge 47 and splint 44, lead to locking spring 45 to compress. Specifically, the following are mentioned: the pressing force of the clamping plate 44 on the primary nozzle comes from the degree of compression of the locking spring 45 itself. At this moment, the driving mechanism is started to drive the nozzle bin 4 to rotate, and then the original nozzle on the laser cutting head is synchronously rotated through the clamping plate 44, so that the original nozzle is spirally discharged from the laser cutting head.

When the original nozzle is required to be taken out of the nozzle bin 4, the annular plate 431 only needs to be pulled upwards to further drive the second wedge block 48 to move upwards, so that the first wedge block 47 resets under the action of the return spring 46, the extrusion force of the clamp plate 44 to the original nozzle is reduced due to the increase of the distance between the first wedge block 47 and the clamp plate 44, and the original nozzle can be taken out of the nozzle bin 4 at the moment.

When the nozzle needs to be replaced to other types or sizes, the operations are carried out in the reverse direction, and the replacement of the nozzle can be realized.

Further, a magnet 5 is disposed at the upper end of the annular plate 431, and an iron member (not shown) which can be matched with the magnet 5 is disposed on the laser cutting head. During nozzle installation: through being provided with magnet 5 on annular plate 431, in the rotatory in-process that rises in nozzle storehouse 4, magnet 5 rises gradually and is close to the iron part on the laser cutting head, when the attraction between magnet 5 and iron part subtracts magnet 5, be greater than the annular plate 431 and the annular groove 43 between the frictional force behind the gravity sum of annular plate 431 and second wedge 48, magnet 5 drives annular plate 431 and second wedge 48 and rises, reset spring 46 resumes deformation and drives first wedge 47 and reset, drive splint 44 shrink contact and to the locking of nozzle, realize the unblock to the nozzle after the installation, prevent that motor 11 from continuing work and driving nozzle storehouse 4 rotation and cause the harm to the nozzle, the durability of nozzle has been ensured.

Specifically, the following are mentioned: magnetic pole force formula: where m is the magnetic pole strength and H is the magnetic field strength, the magnetic field strength generated by the magnetic pole is inversely proportional to the third power of the distance r. Therefore, when the magnet 5 gradually approaches the iron member on the laser cutting head, the magnetic attraction force between the magnet 5 and the iron member gradually increases.

Further, be provided with transmission shaft 3 between nozzle storehouse 4 and the actuating mechanism, be provided with the safeties that can avoid causing the nozzle to damage on the transmission shaft 3, safeties is including torsional spring 6 and commentaries on classics tooth 7, torsional spring 6 and commentaries on classics tooth 7 are located on the transmission shaft 3 between nozzle storehouse 4 and the mounting panel 1, the torsional spring 6 both ends link to each other with nozzle storehouse 4 and commentaries on classics tooth 7 respectively, the outside of transmission shaft 3 is located to commentaries on classics tooth 7 cover, the one end that commentaries on classics tooth 7 is close to mounting panel 1 is provided with the first arch 71 of a plurality of, the outside fixedly connected with fixed plate (the drawing does not mark) of transmission shaft 3, the fixed plate is provided with the second arch 31 of a plurality of and first arch 71 looks meshing along the circumferencial direction, first arch 71 is the same with the protruding 31 quantity of second. The safety device is arranged, when the magnet 5 cannot unlock the nozzle due to weak magnetic force or loss and the like, the nozzle bin 4 generates friction force relative to the movement of the nozzle, the stress of the nozzle bin 4 is transferred to the rotating teeth 7, the rotating teeth 7 and the transmission shaft 3 are movable, the fixing plate is fixedly connected with the transmission shaft 3, the connecting part of the first protrusion 71 and the second protrusion 31 is meshed with slipping force and loosened when the resistance is applied, and when the radial rotation of the rotating teeth 7 is applied with force greater than the pre-pressure of the torsion spring 6, the rotating teeth 7 and the transmission shaft 3 can loosen the slipping force, so that the damage of the nozzle caused by the over-transduction of the motor 11 is prevented, and the service durability of the nozzle is improved.

Further, actuating mechanism is including motor 11, motor 11 is located the bottom of mounting panel 1, be provided with drive shaft 12 on the motor 11 output, bearing connection between drive shaft 12 and the mounting panel 1, the one end that drive shaft 12 passed mounting panel 1 is provided with drive gear 13, the key-type connection between drive gear 13 and the drive shaft 12, the meshing of drive gear 13 one end is provided with two drive gear 2, every drive gear 2 all with 3 key-type connections of transmission shaft, bearing connection between every transmission shaft 3 and the mounting panel 1, every drive gear 2 accessible transmission shaft 3 drives a nozzle compartment 4 syntropy and rotates. Through setting up two nozzle storehouses 4, can realize that one nozzle storehouse 4 is dismantled the former nozzle that is located on the laser cutting head, and another nozzle storehouse 4 can realize installing another nozzle to the laser cutting head on. The processes of disassembly and assembly can be respectively realized by two mutually independent nozzle bins 4. It should be noted that the upper end of the nozzle chamber 4 for performing the disassembling operation may not be provided with the magnet 5, and the fool-proofing is realized by one arrangement with or without the magnet.

Further, still be provided with heavy platform 42 in nozzle storehouse 4, through heavy platform 42 and the setting that holds chamber 41, make the bottom surface that sinks platform 42 and the chamber jade interior that holds chamber 41 form a step circle, the sharp mouth of nozzle stretches into the outer wall that holds chamber 41 chamber jade interior nozzle simultaneously and the bottom surface that sinks platform 42 inconsistent, increase the area of contact with each position of nozzle, carry out preliminary centre gripping to the nozzle, when nozzle storehouse 4 is rotatory, the effectual nozzle and the 4 synchronous rotations in nozzle storehouse of driving of frictional force between usable step circle and the nozzle, through being provided with splint 44, realize pressing from both sides tightly to the nozzle under locking spring 45's effect.

Further, the annular buffer inclined plane 8 with a large upper part and a small lower part is arranged between the bottom of the sinking platform 42 and the inner wall of the accommodating cavity 41, a certain taper exists through the annular buffer inclined plane 8 with the large upper part and the small lower part, the friction force between the nozzle and the nozzle bin 4 can be increased through increasing the friction area between the nozzle and the nozzle, the abrasion of the nozzle is effectively reduced, and the service life of the nozzle is prolonged.

Further, the transmission gears 2 are symmetrical left and right around the driving gear 13, the distances between the transmission gears 2 and the driving gear 13 are kept equal, and the direction is fixed, so that the transmission gears can be used for multiple times.

The working process is as follows:

1. the nozzle dismounting process comprises: the mounting plate 1 connected with a machine tool is controlled by a control system to move to the lower part of a laser cutting head, after one nozzle bin 4 is aligned with a nozzle to be disassembled, the mounting plate 1 is slowly controlled to move upwards until a sharp mouth of the nozzle extends into the cavity wall of the accommodating cavity 41 and the outer diameter of the nozzle is abutted to the bottom surface of the sinking platform 42, then the annular plate 431 is pressed downwards to drive the first wedge-shaped block 47 to press downwards, the force in the vertical direction is dispersed out of the force in the horizontal direction through the inclined surface and is transmitted to the first wedge-shaped block 47 to drive the first wedge-shaped block 47 to move towards the end surface of the communicating groove 421, the clamping plate 44 is driven by the locking spring 45 to move to clamp and lock the nozzle, the control system motor 11 rotates forwards, the driving gear 13 and the motor 11 rotate in the same direction, the transmission gear 2 and the driving gear 13 are meshed and rotate, the transmission gear 2 rotates reversely to drive the nozzle bin 4 to rotate reversely, and the threaded connection between the nozzle and the laser cutting head is released, the nozzle is disassembled from the laser cutting head, and automatic disassembly is realized.

2. The nozzle installation process comprises the following steps: putting a new nozzle to be replaced into another nozzle bin 4, enabling a sharp nozzle of the nozzle to extend into the cavity wall of the accommodating cavity 41, enabling the outer diameter of the nozzle to be abutted against the bottom surface of the sinking platform 42, then pressing down the annular plate 431 to drive the first wedge-shaped block 47 to press down, dispersing force in the vertical direction to force in the horizontal direction through the inclined surface, transmitting the force to the first wedge-shaped block 47 to drive the first wedge-shaped block 47 to move towards the end surface of the communicating groove 421, driving the clamping plate 44 to move through the locking spring 45 to clamp and lock the new nozzle to be replaced, controlling the mounting plate 1 connected with the machine tool to move to the lower part of the laser cutting head through the control system, aligning the new nozzle to the laser cutting head, slowly controlling the mounting plate 1 to move upwards until threads on the new nozzle are aligned with threads on the laser cutting head, controlling the motor 11 to rotate reversely, enabling the driving gear 13 to rotate in the same direction as the motor 11, and enabling the driving gear 2 to be meshed with the driving gear 13 to rotate, the transmission gear 2 rotates in the positive direction to drive the nozzle bin 4 to rotate in the positive direction, the nozzle is rotatably installed on the laser cutting head, meanwhile, the nozzle bin 4 gradually rises in the rotating process to drive the magnet 5 to be close to an iron piece on the laser cutting head, when the nozzle is installed, the motor 11 still rotates, when the attraction force of the magnet 5 and the iron piece minus the sum of the gravity of the magnet 5, the annular plate 431 and the second wedge block 48 is larger than the friction force between the annular plate 431 and the annular groove 43, the magnet 5 drives the annular plate 431 and the second wedge block 48 to move upwards, the return spring 46 restores deformation to drive the first wedge block 47 to contract and reset, the clamping plate 44 is driven to contract through the locking spring 45 to release the locking of the nozzle, thereby preventing the nozzle from being damaged due to the over-transduction of the motor 11, if the nozzle is installed, the magnet 5 cannot drive the locking assembly to release the locking, and the motor 11 still rotates, the nozzle bin 4 generates friction force relative to the nozzle movement, the force of the nozzle bin 4 is transmitted to the rotating tooth 7, the connecting part of the first bulge 71 and the second bulge 31 is engaged, slipped and released under the resistance, the rotating tooth 7 and the transmission shaft 3 will be released and released under the condition that the radial rotation force of the rotating tooth 7 is greater than the pre-pressure of the torsion spring 6, and therefore the nozzle damage caused by the over-transduction of the motor 11 is prevented.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. Automatic trade nozzle device, characterized by: including mounting panel (1) and actuating mechanism, one side of mounting panel (1) is provided with nozzle storehouse (4), actuating mechanism can drive nozzle storehouse (4) and rotate, be provided with chamber (41) that holds the nozzle in nozzle storehouse (4), the up end of nozzle storehouse (4) is provided with annular groove (43) that can be linked together with holding chamber (41), annular groove (43) embeds there is annular plate (431), nozzle storehouse (4) embeds there is locking Assembly, when annular plate (431) removed towards annular groove (43) and in, can drive locking Assembly and press from both sides tightly holding the nozzle in chamber (41).

2. The automatic nozzle changing device according to claim 1, wherein: the number of the locking assemblies is two, the locking assemblies are symmetrically arranged along the axial lead of the nozzle bin (4), and when the annular plate (431) moves towards the annular groove (43), the two locking assemblies can be driven to simultaneously clamp the nozzles in the accommodating cavity (41).

3. The automatic nozzle changing device according to claim 1, wherein: every locking Assembly is including second wedge (48) that is located annular (43), the up end and annular plate (431) fixed connection of second wedge (48), the lower terminal surface of second wedge (48) is provided with first wedge (47) that can cooperate with second wedge (48), be provided with intercommunication groove (421) that can supply second wedge (48) to wear out on the inner wall of nozzle storehouse (4), it is linked together through intercommunication groove (421) and annular (43) to hold chamber (41).

4. The automatic nozzle changing device according to claim 3, wherein: locking spring (45) wear to be equipped with in intercommunication groove (421), the one end and first wedge (47) fixed connection of locking spring (45), the other end fixedly connected with of locking spring (45) can carry out splint (44) that press from both sides tightly to the nozzle, be provided with reset spring (46) between first wedge (47) and annular (43) inner wall.

5. The automatic nozzle changing device according to claim 3, wherein: the annular plate (431) upper end is provided with magnet (5), is provided with on the laser cutting head can with magnet (5) matched with ironware, when the attraction between magnet (5) and ironware subtracts the gravity sum back that magnet (5), annular plate (431) and second wedge (48) are greater than the frictional force between annular plate (431) and annular groove (43), and magnet (5) drive annular plate (431) and second wedge (48) rise.

6. The automatic nozzle changing device according to claim 1, wherein: be provided with between nozzle storehouse (4) and the actuating mechanism transmission shaft (3), be provided with the safeties that can avoid causing the nozzle to damage on transmission shaft (3), safeties is including torsional spring (6) and commentaries on classics tooth (7), torsional spring (6) and commentaries on classics tooth (7) are located transmission shaft (3) between nozzle storehouse (4) and mounting panel (1), torsional spring (6) both ends link to each other with nozzle storehouse (4) and commentaries on classics tooth (7) respectively, the outside of transmission shaft (3) is located to commentaries on classics tooth (7) cover, the one end that changes tooth (7) and be close to mounting panel (1) is provided with the first arch (71) of a plurality of, transmission shaft (3) are provided with the protruding (31) of the second of a plurality of and first arch (71) engaged with along the circumferencial direction, first arch (71) are the same with the protruding (31) quantity of second.

7. The automatic nozzle changing device according to claim 6, wherein: actuating mechanism is including motor (11), motor (11) are located the bottom of mounting panel (1), be provided with drive shaft (12) on motor (11) output, the bearing is connected between drive shaft (12) and mounting panel (1), the one end that mounting panel (1) was passed in drive shaft (12) is provided with drive gear (13), the key-type connection between drive gear (13) and drive shaft (12), drive gear (13) one end meshing is provided with two drive gear (2), every drive gear (2) all with transmission shaft (3) key-type connection, every the bearing is connected between transmission shaft (3) and mounting panel (1), every drive gear (2) accessible transmission shaft (3) drive a nozzle storehouse (4) syntropy and rotate.

8. The automatic nozzle changing device according to claim 1, wherein: a sinking platform (42) is also arranged in the nozzle bin (4).

9. The automatic nozzle changer as claimed in claim 8, wherein: an annular buffer inclined plane (8) with a large upper part and a small lower part is arranged between the bottom of the sinking platform (42) and the inner wall of the accommodating cavity (41).

10. The automatic nozzle changer as claimed in claim 7, wherein: the two transmission gears (2) are symmetrical left and right by taking the driving gear (13) as a center.