CN112775571A

CN112775571A - Cutting head anticollision structure

Info

Publication number: CN112775571A
Application number: CN202110156968.3A
Authority: CN
Inventors: 李正; 吴让大; 林晋学; 徐侠
Original assignee: Penta Laser Wenzhou Co ltd
Current assignee: Penta Laser Wenzhou Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-05-11
Anticipated expiration: 2041-02-04
Also published as: CN112775571B

Abstract

The invention discloses a cutting head anti-collision structure which is characterized by comprising a supporting block, a seat body and a nozzle head, wherein a roller is arranged in the supporting block, a connecting rod is arranged on the roller, an anti-collision assembly is hollow in the seat body and comprises a connecting block, a spherical joint, a moving rod, a flange and a limiting plate, a spherical groove is arranged at the bottom of the connecting block, a supporting rod is arranged on the spherical joint, the moving rod is provided with the flange, an opening is formed in the limiting plate, and a return spring is sleeved on the moving rod.

Description

Cutting head anticollision structure

Technical Field

The invention relates to the technical field of laser cutting, in particular to an anti-collision structure of a cutting head.

Background

At present, laser cutting is used as a novel thermal cutting technology, 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, is one of main metal plate cutting modes, and is increasingly widely applied.

The laser cutting head is one of the core components of the laser cutting machine, the structure is precise, the cost is high, and in the operation process of a machine tool, the rigid structure of the laser cutting head cannot be protected in a buffering mode in the actual production process, so that the damage is easily caused. In particular, chinese patent No. CN208556388U discloses an automatic nozzle replacement device for a laser cutting head, which is easily collided with the laser cutting head when an operation error occurs during nozzle replacement, thereby causing damage to the entire laser cutting head, and greatly reducing the service life and machining accuracy of the cutting head, and thus needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a cutting head anti-collision structure with a timely anti-collision function.

In order to achieve the purpose, the invention provides the following technical scheme: the cutting head anti-collision structure comprises a supporting block, a base and a laser cutting head, wherein a nozzle is connected to the inner surface of the laser cutting head in a threaded manner, the laser cutting head is positioned at the bottom of the base, a rotatable roller is arranged in the supporting block, a connecting rod is arranged on the roller, one end of the connecting rod is connected with the top of the base, the base is hollow and provided with an anti-collision assembly, the anti-collision assembly comprises a connecting block, a spherical joint, a moving rod and a limiting plate, a spherical groove is arranged at the bottom of the connecting block, the spherical groove and the spherical joint are clamped, the opening diameter of the spherical groove is smaller than the outer diameter of the spherical joint, so that the spherical joint can rotate relative to the connecting block, the spherical joint is provided with a supporting rod, the supporting rod is connected with the laser cutting, the limiting plate is provided with an opening for the moving rod to penetrate through, the limiting plate is located between the flange and the moving rod, one side, away from the connecting block, of the limiting plate can be abutted to the flange, the moving rod can slide in a reciprocating mode along the inner wall of the opening of the limiting plate, the moving rod is sleeved with a reset spring, one end of the reset spring is abutted to the limiting plate, and the other end of the reset spring is abutted to the top of the connecting block.

The invention is further configured to: still including automatic change nozzle assembly, this automatic change nozzle assembly includes mounting panel and actuating mechanism, and 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 annular plate, the nozzle storehouse is built-in to have locking assembly, when the annular plate removes towards the annular, can drive locking assembly and press from both sides tightly the nozzle that holds the intracavity.

The invention is further configured to: the number of the locking assemblies is two, the locking assemblies are symmetrically arranged along the axial lead of the nozzle bin, and when the annular plate moves towards the inner side of the annular groove, the two locking assemblies can be driven to simultaneously clamp the nozzles in the accommodating cavities.

The invention is further configured 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 invention is further configured 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 invention is further configured 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 invention is further configured 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.

The invention is further configured 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 key-type connection, every the bearing is connected between transmission shaft and the mounting panel, every drive gear accessible transmission shaft drives a nozzle compartment syntropy and rotates.

The invention is further configured to: the roller is connected with the supporting block through a rotating shaft, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively connected with the supporting block and the roller.

The invention is further configured to: the supporting block is internally provided with an alarm device, the alarm device comprises a rotating gear, a rack, a light blocking gear and a light emitter, the rotating gear and one end of the rotating shaft, which is far away from the roller, are coaxially arranged, a chute for accommodating the rack is arranged in the supporting block, the rack can slide along the inner wall of the chute in a reciprocating manner, tooth surfaces are arranged on two sides of the rack, the rack is meshed with the rotating gear, a cavity communicated with the outside and the chute is arranged in the supporting block, the light emitter and the light blocking wheel are arranged in the cavity, the light blocking gear is used for covering the light emitter, the light blocking gear is sector-shaped, and the light blocking gear is meshed with one side, which is close to the cavity, of the.

In conclusion, the invention has the following beneficial effects: when changing nozzle assembly and changing to the nozzle on the laser cutting head, lead to changing nozzle assembly when the side direction striking comes to the laser cutting head because of misoperation, can drive the ball joint through the bracing piece after the laser cutting head outside bears certain pressure and rotate along the direction of pressure, make the side direction striking obtain buffering by a wide margin with this, avoid haring the laser cutting head, laser cutting head can give ascending effort of carriage release lever under the effect of striking simultaneously, make the carriage release lever upwards move in the seat, and drive the laser cutting head rebound and hide in the seat, avoid irregular material's further striking, effectively ensure that the laser cutting head avoids the damage, reset spring can receive vertical striking back quick follow the seat and stretch out the reset at laser cutting head, also can alleviate the striking dynamics when the striking takes place. When the impact does not occur, the reset spring can prevent the nozzle from deviating and deviating in the moving process of the laser cutting head. In addition, when the laser cutting head collides, the supporting block and the laser cutting head can rotate through the roller if the laser cutting head collides, the laser cutting head is prevented from being damaged when colliding, and the service life of the laser cutting head is prolonged.

Drawings

FIG. 1 is a schematic view of a cutting head bump guard of the present invention;

FIG. 2 is a schematic cross-sectional view of the seat and the nozzle of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the support block of FIG. 1;

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

FIG. 5 is a bottom view of the support block and alarm device of FIG. 1;

FIG. 6 is a schematic view of the automatic change nozzle assembly of the present invention;

FIG. 7 is a schematic view of the structure of FIG. 6 with the mounting plate, drive gear and motor removed;

FIG. 8 is a schematic cross-sectional view of FIG. 7;

FIG. 9 is a schematic cross-sectional view of the nozzle cartridge of FIG. 8;

fig. 10 is a schematic sectional view showing the structural linkage of the respective structures in the state of mounting the nozzle in fig. 2 and 8.

Reference numerals: 1. a support block; 11. a drum; 12. a connecting rod; 13. a chute; 2. a base body; 21. connecting blocks; 22. a ball joint; 221. a support bar; 23. a travel bar; 24. a flange; 25. a limiting plate; 26. a spherical groove; 27. a compression spring; 3. a laser cutting head; 31. a nozzle; 4. a rotating shaft; 5. a torsion spring; 6. a rotating gear; 7. a rack; 8. a light blocking gear; 9. a light emitter; 101. mounting a plate; 1011. a motor; 1012. a drive shaft; 1013. a drive gear; 102. a transmission gear; 103. a drive shaft; 1031. a second protrusion; 104. a nozzle bin; 1041. an accommodating chamber; 1042. a communicating groove; 1043. a ring groove; 10431. an annular plate; 1044. a splint; 1045. a locking spring; 1046. a return spring; 1047. a first wedge block; 1048. a second wedge block; 105. a magnet; 106. a torsion spring; 107. rotating the teeth; 1071. a first protrusion; 108. an iron member.

Detailed Description

As shown with reference to figures 1-10,

cutting head anticollision structure, including setting up supporting shoe 1, pedestal 2 and the laser cutting head 3 on the laser cutting lathe, the internal surface threaded connection of laser cutting head 3 has nozzle 31, adopts threaded connection's mode to cooperate between nozzle 31 and the laser cutting head 3, and this is prior art, and chinese patent that can refer to publication number CN106735938B in detail discloses a non-metallic laser cutting head of CO 2.

The laser cutting head 3 is positioned at the bottom of the seat body 2, the rotatable roller 11 is arranged in the supporting block 1, the roller 11 is provided with a connecting rod 12, one end of the connecting rod 12 is connected with the top of the seat body 2, the seat body 2 is hollow and is provided with an anti-collision assembly, the anti-collision assembly comprises a connecting block 21, a spherical joint 22, a moving rod 23 and a limiting plate 25, the bottom of the connecting block 21 is provided with a spherical groove 26, the spherical groove 26 is clamped with the spherical joint 22, the opening diameter of the spherical groove 26 is smaller than the outer diameter of the spherical joint 22, so that the spherical joint 22 can rotate relative to the connecting block 21, the spherical joint 22 is provided with a supporting rod 221, the supporting rod 221 is connected with the laser cutting head 3, the moving rod 23 is integrally connected with the connecting block 21, one end of the moving rod 23, which is far away from the, one side that connecting block 21 was kept away from to limiting plate 25 can be inconsistent with flange 24, and the carriage release lever 23 can follow limiting plate 25 trompil inner wall and reciprocate to slide, and the outside cover of carriage release lever 23 is equipped with reset spring 1046, and reset spring 1046 one end and limiting plate 25 looks butt, the other end and connecting block 21 top looks butt.

When the nozzle assembly is replaced aiming at the nozzle 31 on the laser cutting head 3, and the laser cutting head 3 is impacted from the side direction by the replacement nozzle assembly due to misoperation, the spherical joint 22 is driven to rotate along the direction of the pressure force by the support rod 221 after the outer side of the laser cutting head 3 bears a certain pressure, so that the side impact is greatly buffered, the laser cutting head 3 is prevented from being damaged, at the same time, the laser cutting head 3 will give an upward force to the moving rod 23 under the impact force, so that the moving rod 23 moves upward in the seat body 2, and drive laser cutting head 3 rebound and hide in pedestal 2, avoid further striking, effectively ensure that laser cutting head 3 avoids the damage, reset spring 1046 can receive vertical striking back at laser cutting head 3 and stretch out from pedestal 2 fast and reset, also can alleviate the striking dynamics when the striking takes place. When no impact occurs, the return spring 1046 can prevent the nozzle 31 from deviating and deviating during the movement of the laser cutting head 3. In addition, when the laser cutting head 3 collides, the supporting block 1 and the laser cutting head 3 can rotate through the roller 11, the laser cutting head 3 is prevented from being damaged when colliding, and the service life of the laser cutting head 3 is prolonged.

Further, still including automatic nozzle assembly of changing, this automatic nozzle assembly of changing includes mounting panel 101 and actuating mechanism, one side of mounting panel 101 is provided with nozzle bin 104, actuating mechanism can drive nozzle bin 104 and rotate, be provided with the chamber 1041 that holds nozzle 31 in the nozzle bin 104, the up end of nozzle bin 104 is provided with can with hold the annular 1043 that the chamber 1041 is linked together, annular 1043 embeds there is annular plate 10431, nozzle bin 104 embeds there is locking Assembly, when annular plate 10431 removes towards annular 1043, can drive locking Assembly and press from both sides tightly nozzle 31 on the laser cutting head 3.

When using the original nozzle 31 of change nozzle assembly on to laser cutting head 3 of this application to take off, then only need will hold chamber 1041 and aim at nozzle 31 on the laser cutting head 3, and then remove annular plate 10431 towards annular groove 1043 in to the drive locking assembly presss from both sides tightly nozzle 31. At this moment, the driving mechanism is started to drive the nozzle bin 104 to rotate, and then the original nozzle 31 on the laser cutting head 3 is synchronously rotated through the locking assembly, so that the original nozzle 31 is spirally discharged from the laser cutting head 3.

Specifically, the following are mentioned: because among the prior art, change nozzle assembly and come from there being relative movement between the two to the side direction collision of laser cutting head 3 when changing nozzle 31, and this application adopts locking Assembly to make to change nozzle assembly and laser cutting head 3 and form a whole to avoid taking place relative movement between the two, and then avoid the condition of side direction collision to take place.

Further, the number of the locking devices is two, and the locking devices are symmetrically arranged along the axial line of the nozzle bin 104. When the annular plate 10431 moves toward the annular groove 1043, two locking assemblies are actuated to simultaneously clamp the nozzle 31 in the receiving chamber 1041.

Further, every locking subassembly is including being located second wedge 1048 in annular groove 1043, the up end and the annular plate 10431 fixed connection of second wedge 1048, and the lower terminal surface of second wedge 1048 is provided with first wedge 1047, specific that can cooperate with second wedge 1048: the inclined surface of the second wedge block 1048 is attached to the inclined surface of the first wedge block 1047. The inner wall of the nozzle bin 104 is provided with a communicating groove 1042 through which the second wedge-shaped block 1048 can penetrate, and the accommodating cavity 1041 is communicated with the annular groove 1043 through the communicating groove 1042.

Further, the communicating groove 1042 penetrates through a locking spring 1045, one end of the locking spring 1045 is fixedly connected with the first wedge block 1047, and the other end of the locking spring 1045 is fixedly connected with a clamping plate 1044 capable of clamping the nozzle 31. A return spring 1046 is arranged between the first wedge block 1047 and the inner wall of the annular groove 1043.

Further, a magnet 105 is disposed at the upper end of the annular plate 10431, and an iron member 108 which can cooperate with the magnet 105 is disposed on the laser cutting head 3. During the installation of the nozzle 31: by arranging the magnet 105 on the annular plate 10431, before the nozzle replacement assembly is operated, the nozzle replacement assembly is guided to a designated safety position under the action of magnetic force, a positioning function is achieved, the laser cutting head 3 is prevented from colliding due to misoperation, in the rotating and lifting process of the nozzle cabin 104, the magnet 105 gradually rises to be close to the iron piece 108 on the laser cutting head 3, when the attraction force between the magnet 105 and the iron piece 108 is less than the sum of the gravity of the magnet 105, the annular plate 10431 and the second wedge block 1048 and is greater than the friction force between the annular plate 10431 and the annular groove 1043, the magnet 105 drives the annular plate 10431 and the second wedge block 1048 to rise, the return spring 1046 restores to deform to drive the first wedge block 1047 to return, the clamp plate 1044 is driven to shrink to release the locking of the nozzle 31, the nozzle 31 is unlocked after the installation is finished, and the nozzle cabin 104 is prevented from being driven to rotate by the motor to cause damage to the nozzle 31, the durability of the nozzle 31 is secured.

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. It can be seen that when the magnet 105 approaches the iron 108 of the laser cutting head 3, the magnetic attraction between the magnet 105 and the iron 108 increases gradually. When the attraction force between the magnet 105 and the iron member 108 is increased to be larger than the friction force between the annular plate 10431 and the annular groove 1043, it represents that the new nozzle 31 is completely installed.

Further, be provided with transmission shaft 103 between nozzle chamber 104 and the actuating mechanism, be provided with the safeties that can avoid causing nozzle 31 to damage on the transmission shaft 103, safeties is including torsional spring 106 and commentaries on classics tooth 107, torsional spring 106 and commentaries on classics tooth 107 are located on the transmission shaft 103 between nozzle chamber 104 and the mounting panel 101, torsional spring 106 both ends link to each other with nozzle chamber 104 and commentaries on classics tooth 107 respectively, the outside of transmission shaft 103 is located to commentaries on classics tooth 107 cover, the one end that changes tooth 107 and is close to the mounting panel 101 is provided with the first arch 1071 of a plurality of, the outside fixedly connected with fixed plate (the drawing does not mark) of transmission shaft 103, the fixed plate is provided with the second arch 1031 that a plurality of and first arch 1071 mesh along the circumferencial direction, first arch. The safety device is arranged, when the magnet 105 cannot unlock the nozzle 31 due to weak magnetic force or loss and the like, the nozzle bin 104 moves relative to the nozzle 31 to generate friction force, the force applied to the nozzle bin 104 is transmitted to the rotating teeth 107, the rotating teeth 107 and the transmission shaft 103 are movable, the fixing plate is fixedly connected with the transmission shaft 103, the connecting part of the first bulge 1071 and the second bulge 1031 is disengaged due to meshing slip force when being subjected to resistance, and when the force applied to the radial rotation of the rotating teeth 107 is greater than the pre-pressure of the torsion spring 106, the rotating teeth 107 and the transmission shaft 103 will disengage force, so that the collision damage of the nozzle 31 caused by over-transduction of the motor 1011 is prevented, and the service durability of the nozzle 31 is improved.

Further, the driving mechanism comprises a motor 1011, the motor 1011 is located at the bottom of the mounting plate 101, a driving shaft 1012 is arranged at the output end of the motor 1011, the driving shaft 1012 is in bearing connection with the mounting plate 101, a driving gear 1013 is arranged at one end of the driving shaft 1012 penetrating through the mounting plate 101, the driving gear 1013 is in key connection with the driving shaft 1012, two transmission gears 102 are meshed with one end of the driving gear 1013, each transmission gear 102 is in key connection with the transmission shaft 103, each transmission shaft 103 is in bearing connection with the mounting plate 101, and each transmission gear 102 can drive one nozzle bin 104 to rotate in the same direction through the. By arranging two nozzle bins 104, one nozzle bin 104 can detach the original nozzle 31 on the laser cutting head 3, and the other nozzle bin 104 can install the other nozzle 31 on the laser cutting head 3. The "disassembly" and "assembly" processes are achieved separately by two independent nozzle cartridges 104, simplifying the process to limit the chance of collision damage. It should be noted that the upper end of the nozzle chamber 104 for performing the disassembling operation may not be provided with the magnet 105.

Further, the roller 11 is connected with the supporting block 1 through the rotating shaft 4, the rotating shaft 4 is sleeved with the torsion spring 5, and two ends of the torsion spring 5 are respectively connected with the supporting block 1 and the winding drum. Through the torsional spring 5 that the cover was established on the axis of rotation 4, can make the laser cutting head 3 can resume to initial position, simple and convenient after the emergence collision automatically.

Further, still including alarm device in the supporting shoe 1, alarm device is including rotating gear 6 and rack 7, rotating gear 6 and the coaxial setting of the one end that the axis of rotation 4 kept away from cylinder 11, be provided with spout 13 that holds rack 7 in the supporting shoe 1, rack 7 can follow the reciprocal sliding of spout 13 inner wall, rack 7 both sides all are provided with the flank of tooth, rack 7 meshes with rotating gear 6 mutually, be provided with the cavity that is linked together with outside and spout 13 respectively in the supporting shoe 1, be provided with illuminator 9 and gear 8 that is in the cavity, gear 8 that is in the light is used for covering illuminator 9, gear 8 that is in the light is fan-shaped, gear 8 that is in the light meshes with the one side that rack 7 is close to the cavity mutually. When the roller 11 rotates, the rotating gear 6 can be driven to rotate, the rack 7 is driven to move through the meshing effect between the rotating gear 6 and the rack 7, meanwhile, in the process that the rack 7 moves, the light blocking gear 8 is driven to generate angle deviation, the vacancy of the light blocking gear 8 is right opposite to the illuminator 9, the light source of the illuminator 9 is emitted out of the supporting block 1, the laser cutting head 3 of a user is reminded of shaking, the cutting work can be stopped in time, the cutting precision is prevented from being influenced, the warning effect is good, and the safety factor is high.

The working process is as follows:

when the laser cutting head 3 receives impact, the support rod 221 drives the spherical joint 22 to rotate in the spherical groove 26 to buffer the impact, under the impact force, the moving rod 23 contracts to drive the laser cutting head 3 to move upwards, the return spring 1046 compresses and deforms, meanwhile, the laser cutting head 3 and the base body 2 realize relative rotation through the roller 11, simultaneously drive the rotating shaft 4 and the rotating gear 6 to rotate, the torsion spring 5 deforms, the rotating gear 6 drives the rack 7 to move, the rack 7 moves to drive the light blocking gear 8 to rotate to generate angular deviation, so that the light blocking gear 8 no longer covers the light source of the illuminator 9, the light source of the illuminator 9 is emitted out of the supporting block 1 to complete the alarm, after the impact is released in the first time, the return spring 1046 is reset and deformed to drive the laser cutting head 3 to extend out of the base body 2 to reset, meanwhile, the torsion spring 5 resets to drive the rotating shaft 4 to rotate, and the base body 2 and the laser cutting head 3 which are connected with the connecting rod 12 are driven to reset through the rotation of the roller 11.

In addition, the application also has another working process:

1. the nozzle dismounting process comprises: the mounting plate 101 connected with a machine tool is controlled by a control system to move to the lower part of the laser cutting head 3, after one nozzle bin 104 is aligned with a nozzle 31 to be disassembled, the mounting plate 101 is slowly controlled to move upwards, then the annular plate 10431 is pressed downwards to drive the first wedge block 1047 to press downwards, the force in the vertical direction is dispersed out of the force in the horizontal direction through the inclined plane and is transmitted to the first wedge block 1047 to drive the first wedge block 1047 to move towards the end surface of the communicating groove 1042, the clamping plate 1044 is driven by the locking spring 1045 to move to clamp and lock the nozzle 31, the motor 1011 of the control system rotates in the forward direction, the driving gear 1013 rotates in the same direction as the motor, meanwhile, the transmission gear 102 is meshed with the driving gear 1013, the transmission gear 102 rotates in the reverse direction to drive the nozzle bin 104 to rotate in the reverse direction, the threaded connection between the nozzle 31 and the laser cutting head 3, automatic disassembly is realized, safety and no collision are realized, and the quality of the nozzle 31 is guaranteed.

2. The nozzle installation process comprises the following steps: placing a new nozzle 31 to be replaced into another nozzle bin 104, then pressing down the annular plate 10431 to drive the first wedge block 1047 to press down, dispersing a vertical force to a horizontal force to the first wedge block 1047 through an inclined plane, driving the first wedge block 1047 to move towards the end surface of the communicating groove 1042, driving the clamp plate 1044 to move through the locking spring 1045 to clamp and lock the new nozzle 31 to be replaced, then controlling the mounting plate 101 connected with the machine tool to move to the lower part of the laser cutting head 3 through the control system, aligning the new nozzle 31 to the laser cutting head 3 under the guidance of magnetic force between the magnet 105 and the iron piece 108, slowly controlling the mounting plate 101 to move upwards until threads on the new nozzle 31 are aligned with threads on the laser cutting head 3, controlling the motor 1011 to rotate reversely, controlling the driving gear 1013 to rotate in the same direction as the motor 1011, and simultaneously meshing the driving gear 102 with the driving gear 1013, the transmission gear 102 rotates forward to drive the nozzle bin 104 to rotate forward, the nozzle 31 is rotatably mounted on the laser cutting head 3, meanwhile, the nozzle bin 104 gradually rises in the rotating process to drive the magnet 105 to be close to the iron part 108 on the laser cutting head 3, when the nozzle 31 is mounted, the motor 1011 still rotates, when the attraction force of the magnet 105 and the iron part 108 minus the sum of the gravity of the magnet 105, the annular plate 10431 and the second wedge 1048 is greater than the friction force between the annular plate 10431 and the annular groove 1043, the magnet 105 drives the annular plate 10431 and the second wedge 1048 to move upwards, the return spring 1046 recovers deformation to drive the first wedge 1047 to contract and return, the clamp plate is driven to contract through the locking spring 1045 to release the locking of the nozzle 31, thereby preventing the nozzle 31 from being damaged due to the over-transduction of the motor 1011, and when the nozzle 31 is mounted, the magnet 105 cannot drive the locking assembly to release the locking, and the motor 1011 still rotates, the nozzle cabin 104 moves relative to the nozzle 31 to generate friction force, the force applied to the nozzle cabin 104 is transmitted to the rotating teeth 107, the joint part of the first bulge 1071 and the second bulge 1031 is loosened by the engaging slip force when being subjected to resistance, and the rotating teeth 107 and the transmission shaft 103 are loosened by the radial rotation force of the rotating teeth 107 which is larger than the pre-pressure force of the torsion spring 106, thereby preventing the nozzle 31 from being damaged by collision caused by the over-transduction of the motor 1011.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. Cutting head anticollision structure, characterized by: comprises a supporting block (1), a base body (2) and a laser cutting head (3), wherein the inner surface of the laser cutting head (3) is connected with a nozzle (31) in a threaded manner, the laser cutting head (3) is positioned at the bottom of the base body (2), a rotatable roller (11) is arranged in the supporting block (1), a connecting rod (12) is arranged on the roller (11), one end of the connecting rod (12) is connected with the top of the base body (2), the base body (2) is hollow and is provided with an anti-collision component, the anti-collision component comprises a connecting block (21), a spherical joint (22), a moving rod (23) and a limiting plate (25), the bottom of the connecting block (21) is provided with a spherical groove (26), the spherical groove (26) and the spherical joint (22) are clamped with each other, the opening diameter of the spherical groove (26) is smaller than the outer diameter of the spherical joint (22), so that the spherical, the laser cutting head comprises a spherical joint (22) and is characterized in that the spherical joint (22) is provided with a supporting rod (221), the supporting rod (221) is connected with a laser cutting head (3), a moving rod (23) is connected with a connecting block (21), one end, far away from the laser cutting head (3), of the moving rod (23) is provided with a flange (24), a hole for the moving rod (23) to pass through is formed in a limiting plate (25), the limiting plate (25) is located between the flange (24) and the moving rod (23), one side, far away from the connecting block (21), of the limiting plate (25) can be abutted to the flange (24), the moving rod (23) can slide in a reciprocating mode along the inner wall of the hole of the limiting plate (25), a compression spring (27) is sleeved outside the moving rod (23), one end of the compression spring (27) is abutted to the limiting ring;

the roller (11) is connected with the supporting block (1) through a rotating shaft (4), a torsion spring (5) is sleeved on the rotating shaft (4), and two ends of the torsion spring (5) are respectively connected with the supporting block (1) and the winding drum;

the supporting block (1) is also internally provided with an alarm device which comprises a rotating gear (6), a rack (7), a light blocking gear (8) and a light emitter (9), the rotating gear (6) and one end of the rotating shaft (4) far away from the roller (11) are coaxially arranged, a sliding groove (13) for accommodating the rack (7) is arranged in the supporting block (1), the rack (7) can slide along the inner wall of the chute (13) in a reciprocating way, the two surfaces of the rack (7) are both provided with tooth surfaces, the rack (7) is meshed with the rotating gear (6), a cavity communicated with the outside and the chute (13) is arranged in the supporting block (1), a light emitter (9) and a light blocking gear (8) are arranged in the cavity, the light blocking gear (8) is used for covering the light emitter (9), the light blocking gear (8) is fan-shaped, and the light blocking gear (8) is meshed with one surface, close to the cavity, of the rack (7).

2. The cutting head bump guard structure of claim 1, wherein: still including automatic change nozzle assembly, this automatic change nozzle assembly includes mounting panel (101) and actuating mechanism, and one side of mounting panel (101) is provided with nozzle storehouse (104), actuating mechanism can drive nozzle storehouse (104) and rotate, be provided with chamber (1041) that holds nozzle (31) in nozzle storehouse (104), the up end of nozzle storehouse (104) is provided with annular (1043) that can be linked together with holding chamber (1041), annular (1043) embeds there is annular plate (10431), nozzle storehouse (104) embeds there is locking Assembly, when annular plate (10431) move towards annular groove (1043), can drive locking assembly and press from both sides tightly nozzle (31) that hold in the chamber (1041).

3. The cutting head bump guard structure of claim 2, wherein: the number of the locking assemblies is two, the locking assemblies are symmetrically arranged along the axial lead of the nozzle bin (104), and when the annular plate (10431) moves towards the annular groove (1043), the two locking assemblies can be driven to simultaneously clamp the nozzle (31) in the accommodating cavity (1041).

4. The cutting head bump guard structure of claim 2, wherein: every locking Assembly is including second wedge (1048) that is located annular (1043), the up end and the annular plate (10431) fixed connection of second wedge (1048), the lower terminal surface of second wedge (1048) is provided with first wedge (1047) that can cooperate with second wedge (1048), be provided with intercommunication groove (1042) that can supply second wedge (1048) to wear out on the inner wall of nozzle storehouse (104), it is linked together with annular (1043) through intercommunication groove (1042) to hold chamber (1041).

5. The cutting head bump guard structure of claim 4, wherein: the nozzle (31) is characterized in that a locking spring (1045) penetrates through the communicating groove (1042), one end of the locking spring (1045) is fixedly connected with a first wedge-shaped block (1047), and the other end of the locking spring (1045) is fixedly connected with a clamping plate (1044) capable of clamping the nozzle (31). And a return spring (1046) is arranged between the first wedge-shaped block (1047) and the inner wall of the ring groove (1043).

6. The cutting head bump guard structure of claim 4, wherein: the upper end of the annular plate (10431) is provided with a magnet (105), the laser cutting head (3) is provided with an iron piece (108) which can be matched with the magnet (105), and when the attraction force between the magnet (105) and the iron piece (108) is less than the gravity sum of the magnet (105), the annular plate (10431) and the second wedge-shaped block (1048) and then is larger than the friction force between the annular plate (10431) and the ring groove (1043), the magnet (105) drives the annular plate (10431) and the second wedge-shaped block (1048) to ascend.

7. The cutting head bump guard structure of claim 1, wherein: be provided with transmission shaft (103) between nozzle storehouse (104) and the actuating mechanism, be provided with the safeties that can avoid causing nozzle (31) to damage on transmission shaft (103), safeties is including torsional spring (106) and commentaries on classics tooth (107), torsional spring (106) and commentaries on classics tooth (107) are located on transmission shaft (103) between nozzle storehouse (104) and mounting panel (101), torsional spring (106) both ends link to each other with nozzle storehouse (104) and commentaries on classics tooth (107) respectively, the outside of transmission shaft (103) is located to commentaries on classics tooth (107) cover, the one end that changes tooth (107) and is close to mounting panel (101) is provided with the first arch (1071) of a plurality of, transmission shaft (103) are provided with the second arch (1031) of a plurality of and first arch (1071) engaged with along the circumferencial direction, first arch (1071) are the same with second arch (1031) quantity.

8. The cutting head bump guard structure of claim 7, wherein: the drive mechanism is including motor (1011), motor (1011) is located the bottom of mounting panel (101), be provided with drive shaft (1012) on motor (1011) output, bearing connection between drive shaft (1012) and mounting panel (101), the one end that drive shaft (1012) passed mounting panel (101) is provided with drive gear (1013), the key-type connection between drive gear (1013) and drive shaft (1012), drive gear (1013) one end meshing is provided with two drive gear (102), every drive gear (102) all with transmission shaft (103) key-type connection, every bearing connection between transmission shaft (103) and mounting panel (101), every drive gear (102) accessible transmission shaft (103) drive a nozzle storehouse (104) syntropy.