Nozzle clamping mechanism and laser cutting head automatic nozzle replacement device

Abstract

The present application relates to laser cutting processing technical field, nozzle clamping mechanism and laser cutting head automatic replacement nozzle device are disclosed. The nozzle clamping mechanism includes fixed support;Rotary shaft is fixed below the fixed support, and the rotary shaft is provided with a guide hole;Movable support includes support table and the mobile guide rod fixedly arranged on the bottom of support table, and the mobile guide rod is slidably connected in the guide hole;The elastic member is abutted on the bottom of support table and the top of rotary shaft;Nozzle support is fixed on the support table, and is used for placing nozzle;Clamping assembly includes connecting rod and jaw, one end of connecting rod is hinged with support table, and the other end is hinged with jaw;Jaw connecting seat is fixed above the fixed support, and the jaw connecting seat is provided with a track extending along its radial direction, and the jaw is slidably installed in the track, and the jaw can be close to each other with the descending of movable support, so as to clamp nozzle. The present application has simple structure, and the clamping of nozzle is stable and reliable, and can be suitable for the disassembly and replacement of various different appearance, model nozzle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cutting processing, and particularly relates to a nozzle clamping mechanism and a laser cutting head automatic nozzle replacing device. BACKGROUND

[0002] Laser cutting is a kind of thermal cutting technology, which has the advantages of fast cutting speed, high production efficiency, good cutting end face quality, small heat affected zone and environmental protection. In the process of laser cutting different thicknesses of metal materials, in order to achieve better cutting effect, it is usually necessary to replace the corresponding type of nozzle according to the actual cutting working condition requirements. In addition, since the laser cutting process is a high-heat process, part of the flying debris generated in the cutting process will cause a certain degree of damage to the nozzle, affecting the cutting quality, so the nozzle also needs to be disassembled, detected and replaced.

[0003] The traditional nozzle replacement of the laser cutting head relies on manual operation, and the replacement process is tedious, the safety factor is low, and after the replacement is completed, the corresponding working condition needs to be calibrated, and then the cutting process is carried out, which takes a long time to replace and affects the cutting efficiency. With the development of intelligentization in the field of laser cutting, the laser cutting head automatic nozzle replacing device emerges as the times require, which first clamps the nozzle through the nozzle clamping mechanism, and then drives the nozzle clamping mechanism to rotate through the rotating driving assembly, so as to rotate the nozzle from the laser cutting head or install the nozzle on the laser cutting head, thereby realizing the automatic disassembly and replacement of the nozzle and improving the work efficiency.

[0004] However, the existing nozzle clamping mechanism often uses the friction between the nozzle and the nozzle seat to clamp and constrain the nozzle, which is unstable and has poor reliability. In addition, since the forms of nozzles on the market are various and the appearances are different, the existing nozzle clamping method can only replace a certain specific appearance and type of nozzle, which has poor universality and cannot meet the diversified production needs of laser manufacturers.

[0005] Therefore, there is an urgent need for a nozzle clamping mechanism and a laser cutting head automatic nozzle replacing device to solve the above technical problems. SUMMARY

[0006] Based on the above, the purpose of the present application is to provide a nozzle clamping mechanism and a laser cutting head automatic nozzle replacing device, which has a simple structure, stable and reliable clamping of the nozzle, and can be applied to the disassembly and replacement of nozzles of various appearances and types.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] On the one hand, the present application provides a nozzle clamping mechanism, which comprises:

[0009] The fixed support is internally provided with a containing cavity, and a slot is arranged on the side wall of the containing cavity;

[0010] The rotating shaft is fixedly connected to the lower portion of the fixed support, and is internally provided with a guide hole communicated with the containing cavity, and is used for being connected with a rotating driving assembly;

[0011] The movable support is installed in the containing cavity, and comprises a supporting table and a moving guide rod fixedly arranged on the bottom of the supporting table, and the moving guide rod is slidingly connected in the guide hole;

[0012] The elastic member is sleeved on the moving guide rod, and the two ends of the elastic member are respectively abutted against the bottom of the supporting table and the top of the rotating shaft;

[0013] The nozzle support is fixedly arranged on the supporting table, and the nozzle support is internally used for placing a nozzle;

[0014] The clamping assembly comprises at least two connecting rods and at least two clamping claws in one-to-one correspondence, one end of each connecting rod is hingedly connected with the supporting table, and the other end of the connecting rod is hingedly connected with the corresponding clamping claw through the slot;

[0015] The clamping claw connecting seat is fixedly arranged on the upper portion of the fixed support, at least two tracks extending in the radial direction of the clamping claw connecting seat are formed in the clamping claw connecting seat, each clamping claw is slidingly installed in each track in one-to-one correspondence, and each clamping claw can be close to each other to clamp the nozzle with the downward movement of the movable support.

[0016] In some possible implementation manners, the track is provided with a limiting portion at the opening close to the nozzle side, the front end of the clamping claw is provided with an abutting portion, the abutting portion is used for abutting against the nozzle through the opening, and the limiting portion is used for limiting the movement position of the clamping claw.

[0017] In some possible implementation manners, the moving guide rod is provided with a guide groove extending in the axial direction of the moving guide rod, and the rotating shaft is internally provided with a limiting screw, the limiting screw is slidingly matched with the guide groove, and is used for limiting the movement position of the moving guide rod.

[0018] In some possible implementation manners, the supporting table and the connecting rod are hingedly connected through a first pin and a first clamping spring, and the connecting rod and the clamping claw are hingedly connected through a second pin and a second clamping spring.

[0019] In some possible implementation manners, in addition to the clamping spring-pin connection mode, other constraint connection modes can also be adopted between the supporting table and the connecting rod and between the connecting rod and the clamping claw, as long as the purpose of connecting rod transmission can be achieved.

[0020] In some possible implementation manners, the support table is in a cylindrical shape, and an outer sidewall of the support table is provided with a protruding portion; the connecting rod is in an "H" shape, and includes a support portion, a first lug portion located at a lower end of the support portion, and a second lug portion located at an upper end of the support portion; the claw includes a sliding block portion and a connecting portion located below the sliding block portion, the sliding block portion is installed in the track, and the connecting portion penetrates through a bottom of the track; the first pin penetrates through the protruding portion and the first lug portion, and the first clasp spring is installed on the first pin; the second pin penetrates through the second lug portion and the connecting portion, and the second clasp spring is installed on the second pin.

[0021] In some possible implementation manners, an inner wall of the nozzle support is in a conical surface, and the nozzle is coaxially placed in the nozzle support.

[0022] In some possible implementation manners, the nozzle support, the movable support and the rotating shaft are coaxially arranged.

[0023] In some possible implementation manners, the elastic member is a compression spring.

[0024] In some possible implementation manners, the claw connecting seat and the fixed support are fixed through a first fastener; the fixed support and the rotating shaft are fixed through a second fastener, and the second fastener is perpendicular to an axis of the rotating shaft; and the nozzle support and the movable support are fixed through a third fastener.

[0025] In another aspect, the present application provides a laser cutting head automatic nozzle changing device, which comprises a laser cutting head, a nozzle arranged at a bottom of the laser cutting head, a mounting seat located below the laser cutting head, and a rotating driving assembly, and further comprises the nozzle clamping mechanism according to any one of the above-mentioned solutions, the nozzle clamping mechanism is installed on the mounting seat, and the rotating driving assembly is connected with the rotating shaft and used for driving the rotating shaft to rotate.

[0026] The present application has the following beneficial effects:

[0027] The nozzle clamping mechanism provided by the application can achieve the purpose of stable clamping of the nozzle when the movable support is pressed to make the moving guide rod move downward in the guide hole of the rotating shaft, and the movable support can drive the claw to move along the track in the claw connecting seat and approach each other through the connecting rod, so that the nozzle is stably clamped. Meanwhile, the elastic element is compressed during the movement of the moving guide rod, which not only plays the role of elastic buffering, but also makes the nozzle support be subjected to the elastic force in the upward direction, so that the contact between the nozzle and the nozzle support is more close, the friction force is greater, and the connection is more reliable. When the laser cutting head moves upward, the movable support moves upward under the action of the elastic force of the elastic element, and the connecting rod drives the claw to return to the initial position and loosen the nozzle. The application has the advantages of simple structure, easy operation, stable and reliable clamping of the nozzle, good universality, and the clamping assembly can clamp and constrain nozzles of different specifications, models and appearances (such as circular nozzles and hexagonal nozzles).

[0028] The laser cutting head automatic nozzle replacement device provided by the application can stably clamp the nozzle through the nozzle clamping mechanism, and then drive the rotating shaft to rotate through the rotating drive assembly, so as to twist the nozzle off the laser cutting head or install the nozzle on the laser cutting head. The application has the advantages of stable and reliable clamping of the nozzle, high work efficiency, and can be applied to the disassembly and replacement of nozzles of different appearances and sizes. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the nozzle clamping mechanism provided by the embodiment of the application;

[0030] Figure 2 is a top view of the nozzle clamping mechanism provided by the embodiment of the application;

[0031] Figure 3 is a sectional view of the nozzle clamping mechanism provided by the embodiment of the application;

[0032] Figure 4 is an internal structure view of the nozzle clamping mechanism provided by the embodiment of the application without the fixed support;

[0033] Figure 5 is an exploded view of the nozzle clamping mechanism provided by the embodiment of the application;

[0034] Figure 6 is a structural schematic view of the claw connecting seat provided by the embodiment of the application;

[0035] Figure 7 is a structural schematic view of the clamping assembly provided by the embodiment of the application;

[0036] Figure 8 is a structural schematic view of the movable support provided by the embodiment of the present application.

[0037] In the figure:

[0038] 1, fixed support; 11, accommodating cavity; 12, slot;

[0039] 2, rotating shaft; 21, guide hole; 22, limiting screw;

[0040] 3, movable support; 31, support table; 311, protruding part; 312, first connecting hole; 32, moving guide rod; 321, guide groove;

[0041] 4, elastic member;

[0042] 5, nozzle support;

[0043] 6, clamping assembly; 61, connecting rod; 611, support part; 612, first lug part; 613, second lug part; 614, second connecting hole; 615, third connecting hole; 62, clamping jaw; 621, abutting part; 622, sliding block part; 623, connecting part; 624, fourth connecting hole; 63, first pin; 64, first clamping spring; 65, second pin; 66, second clamping spring;

[0044] 7, clamping jaw connecting seat; 71, track; 711, limiting part;

[0045] 8, first fastener; 9, second fastener; 10, third fastener;

[0046] 100, nozzle. DETAILED DESCRIPTION

[0047] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0048] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0050] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] The present embodiment provides a nozzle clamping mechanism for a laser cutting head automatic nozzle replacement device, which clamps and restrains or stores the nozzle, so as to solve the problem that the existing nozzle clamping device is unstable in clamping the nozzle, has poor reliability, and can only be applied to a nozzle with a certain specific appearance shape.

[0052] As Figures 1-8As shown, the embodiment provides a nozzle clamping mechanism, which comprises a fixed support 1, a rotating shaft 2, a movable support 3, an elastic member 4, a nozzle support 5, a clamping assembly 6 and a claw connecting seat 7. The fixed support 1 is a support structure of the whole nozzle clamping mechanism, which is in a cylindrical shape, with an open upper end and a rotating shaft mounting hole at the lower end. The inside of the fixed support 1 is provided with a containing cavity 11 for containing the movable support 3, the elastic member 4, the nozzle support 5 and other structures. The side wall of the containing cavity 11 is uniformly provided with at least two notches 12 for avoiding the clamping assembly 6 and facilitating the clamping assembly 6 to pass through. Preferably, the fixed support 1 of the embodiment is provided with three notches 12. The upper end of the rotating shaft 2 is mounted in the rotating shaft mounting hole of the fixed support 1, and the rotating shaft 2 is provided with a guide hole 21 communicating with the containing cavity 11. The rotating shaft 2 is used to be connected with a rotating driving assembly to drive the whole nozzle clamping mechanism to rotate. The movable support 3 is mounted in the containing cavity 11, and the movable support 3 comprises a support table 31 and a moving guide rod 32 fixedly arranged at the bottom of the support table 31. The moving guide rod 32 can move up and down in the guide hole 21. The elastic member 4 is sleeved on the moving guide rod 32, and the two ends of the elastic member 4 abut against the bottom of the support table 31 and the top of the rotating shaft 2, respectively. In the embodiment, the elastic member 4 is preferably a compression spring. Further, the diameter of the moving guide rod 32 is smaller than the diameter of the guide hole 21, the inner diameter of the compression spring is larger than the outer diameter of the moving guide rod 32, and the outer diameter of the compression spring is smaller than the outer diameter of the rotating shaft 2, so as to ensure the normal compression and rebound of the compression spring. The nozzle support 5 is fixed on the support table 31, and different appearance and different model nozzles 100 can be placed in the nozzle support 5, so as to support and store the nozzles 100. The clamping assembly 6 comprises at least two connecting rods 61 and at least two claws 62 corresponding to each other. One end of each connecting rod 61 is hinged to the support table 31 of the movable support 3, and the other end passes through the notch 12 and is hinged to the corresponding claw 62. The movable support 3, the connecting rod 61 and the claw 62 can form a connecting rod mechanism. Preferably, the embodiment is provided with three connecting rods 61 and three claws 62. The claw connecting seat 7 is fixed above the fixed support 1, and the claw connecting seat 7 is provided with at least two radial tracks 71. Each claw 62 is slidingly installed in each track 71. Preferably, the embodiment is provided with three tracks 71. When the laser cutting head presses down the nozzle support 5, the moving guide rod 32 moves down in the guide hole 21 of the rotating shaft 2, and each claw 62 moves along the corresponding track 71 and approaches each other under the action of each connecting rod 61. When the front end of the claw 62 contacts and abuts against the nozzle 100, the nozzle 100 can be clamped and constrained. When the claw 62 completely constrains the nozzle 100, the rotating driving assembly drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives the whole nozzle clamping mechanism to rotate, so as to realize the dismounting and replacing of the nozzle 100.

[0053] The nozzle clamping mechanism provided by the application can clamp and constrain the nozzle 100 when the laser cutting head presses the nozzle support 5 or the nozzle 100, and the movable support 3 is pressed to move the moving guide rod 32 downward in the guide hole 21 of the rotating shaft 2. Since the movable support 3, the connecting rod 61 and the claw 62 form a connecting rod mechanism, the movable support 3 can drive the claw 62 to move along the track 71 in the claw connecting seat 7 and approach each other through the connecting rod 61, so as to clamp and constrain the nozzle 100. At the same time, the elastic member 4 is compressed during the movement of the moving guide rod 32, which not only plays a role of elastic buffering, but also makes the nozzle support 5 subjected to the elastic force upward, so that the contact between the nozzle support 5 and the nozzle 100 is more close, the friction is greater, and the connection is more reliable. When the laser cutting head moves upward, the movable support 3 moves upward under the action of the elastic force of the elastic member 4, and the connecting rod 61 drives the claw 62 to return to the initial position and loosen the nozzle 100. The nozzle clamping mechanism has the advantages of simple structure, easy operation, stable and reliable clamping of the nozzle 100, good universality, and the clamping assembly 6 can clamp and constrain nozzles 100 of different specifications, models and appearances (such as circular nozzles and hexagonal nozzles). It should be noted that the nozzle clamping mechanism can clamp and constrain the nozzle 100 during the replacement of the nozzle 100, and can store the nozzle 100 when the nozzle 100 is not replaced.

[0054] Further, with reference to Figure 6 The claw connecting seat 7 of the embodiment further comprises a limiting portion 711 located at the opening of the track 71 close to the nozzle 100, which is used to limit the moving position of the claw 62 along the track 71. Preferably, the limiting portion 711 of the embodiment is a limiting step. With reference to Figure 7 In the embodiment, the front end of the claw 62 (i.e. the end close to the nozzle 100) is further provided with a protruding abutting portion 621, which can pass through the opening and abut against the nozzle 100 to clamp and fix the nozzle 100. The other parts of the claw 62 will not extend out of the opening due to the limitation of the limiting portion 711, so that the claw 62 will not move excessively and damage the nozzle 100. Specifically, the length of the track 71 and the size of the abutting portion 621 can be set according to the size of the nozzle 100 to be clamped and the clamping force, and the embodiment does not make specific limitation. In addition, the surface roughness and flatness of the track 71 in the claw connecting seat 7 are as small as possible, so that the claw 62 will not be stuck during movement.

[0055] Further, in order to limit the movement between the rotating shaft 2 and the moving guide rod 32, the side wall of the moving guide rod 32 is provided with a guide groove 321 extending along the axial direction thereof, and the rotating shaft 2 is provided with a limiting screw 22 penetrating the side wall of the guide hole 21 and being in sliding fit with the guide groove 321. During the movement of the movable support 3, the limiting screw 22 slides relative to the guide groove 321, and when the upper end or the lower end of the guide groove 321 abuts against the limiting screw 22, the limiting screw 22 can limit the continuous movement of the moving guide rod 32. In this way, on the one hand, the clamping force of the pawl 62 can be prevented from being too large to damage the nozzle 100, thereby playing a limiting protection role; on the other hand, the moving guide rod 32 and the rotating shaft 2 are connected as a whole, thereby preventing the moving guide rod 32 from being detached from the guide hole 21. Preferably, the axis of the limiting screw 22 is perpendicular to the axis of the rotating shaft 2. It should be noted that the specific position of the guide groove 321 on the moving guide rod 32 and the length of the guide groove 321 can be reasonably set according to the clamping constraint force of the nozzle, as long as the nozzle 100 can be clamped and constrained and the nozzle 100 can be prevented from being damaged.

[0056] Reference Figures 4-8In the embodiment, the support table 31 is hingedly connected with the connecting rod 61 through the first pin 63 and the first clasp 64, and the connecting rod 61 is hingedly connected with the claw 62 through the second pin 65 and the second clasp 66, so that a linkage mechanism is formed between the support table 31, the connecting rod 61 and the claw 62. Specifically, the support table 31 is in a cylindrical shape, and three protruding portions 311 are uniformly arranged on the outer side wall of the support table 31, and each protruding portion 311 is provided with a first connecting hole 312. The connecting rod 61 is in an "H" shape, including a support portion 611, a first lug portion 612 located at the lower end of the support portion 611 and a second lug portion 613 located at the upper end of the support portion 611, the first lug portion 612 is provided with a second connecting hole 614, and the second lug portion 613 is provided with a third connecting hole 615. The claw 62 includes a sliding block portion 622 and a connecting portion 623 located below the sliding block portion 622, the sliding block portion 622 is installed in the track 71, and the abutting portion 621 is arranged at the front end of the sliding block portion 622; the connecting portion 623 penetrates through the bottom of the track 71, and the connecting portion 623 is provided with a fourth connecting hole 624. The first pin 63 penetrates through the first connecting hole 312 and the second connecting hole 614 to connect the protruding portion 311 with the first lug portion 612; the first clasp 64 is installed at both ends of the first pin 63 and abuts against the first lug portion 612, so that the stable hinging connection between the support table 31 and the connecting rod 61 is realized. The second pin 65 penetrates through the third connecting hole 615 and the fourth connecting hole 624 to connect the second lug portion 613 with the connecting portion 623; the second clasp 66 is installed at both ends of the second pin 65 and abuts against the second lug portion 613, so that the stable hinging connection between the connecting rod 61 and the claw 62 is realized. Of course, in other embodiments, the support table 31 and the connecting rod 61, and the connecting rod 61 and the claw 62 can also adopt other constraint connection modes, as long as the purpose of transmission between linkages is achieved, and the embodiment is not limited.

[0057] Preferably, the inner wall of the nozzle holder 5 in the embodiment is in a conical surface, so that when the nozzle 100 is placed in the nozzle holder 5, the nozzle holder 5 and the nozzle 100 can maintain good coaxiality, prevent the nozzle 100 from tilting, and ensure good contact between the nozzle 100 and the nozzle holder 5. The nozzle holder 5 of the embodiment is suitable for placing various nozzles of different shapes and sizes, such as circular nozzles and hexagonal nozzles. Further, the nozzle holder 5, the movable holder 3 and the rotating shaft 2 in the embodiment are also coaxially arranged, so that the operation of the whole nozzle clamping mechanism is more stable and reliable.

[0058] In this embodiment, the clamping seat 7 and the fixed support 1 can be fixed by the first fasteners 8. Preferably, the first fasteners 8 are screws, and three first fasteners 8 are evenly arranged between the three clamping jaws 62, and the axis of the first fasteners 8 is parallel to the axis of the clamping seat 7, that is, the first fasteners 8 extend downward from the upper end surface of the clamping seat 7 to connect the fixed support 1 and the clamping seat 7. Further, the fixed support 1 and the rotating shaft 2 can be fixed by the second fasteners 9. Preferably, the second fasteners 9 are screws, and three second fasteners 9 are evenly arranged, and the axis of the second fasteners 9 is perpendicular to the axis of the rotating shaft 2, and the second fasteners 9 extend along the radial direction of the side wall of the fixed support 1 to connect the fixed support 1 and the rotating shaft 2. Further, the nozzle seat 5 and the movable support 3 are fixed by the third fasteners 10. Preferably, the third fasteners 10 are screws, and the third fasteners 10 are coaxially arranged with the nozzle seat 5 and are connected with the nozzle seat 5 and the movable support 3 in the axial direction.

[0059] The embodiment also provides a laser cutting head automatic nozzle changing device, which comprises a laser cutting head, a nozzle 100, a mounting seat, a rotating drive assembly and a nozzle clamping mechanism as described above. The mounting seat is located below the laser cutting head, the nozzle clamping mechanism and the rotating drive assembly are arranged on the mounting seat, the nozzle 100 is threadedly connected to the bottom of the laser cutting head or placed in the nozzle seat 5 of the nozzle clamping mechanism; the rotating drive assembly is in transmission connection with the rotating shaft 2 through a key to drive the rotating shaft 2 and the entire nozzle clamping mechanism to rotate.

[0060] The laser cutting head automatic nozzle replacement device provided by the embodiment is used when the laser cutting head executes a nozzle replacement instruction, the laser cutting head is moved to the upper side of the nozzle clamping mechanism, the laser cutting head is positioned according to the visual recognition detection device of the laser cutting head, so as to ensure the accurate alignment between the laser cutting head and the nozzle clamping mechanism; then the laser cutting head is moved downward to press the nozzle support 5, the nozzle support 5 drives the moving guide rod 32 of the movable support 3 to move downward in the guide hole 21 in the rotating shaft 2, the movable support 3, the connecting rod 61 and the claw 62 form a connecting rod mechanism, so as to drive the claw 62 to move radially in the track 71 of the claw connecting seat 7, when the laser cutting head is moved to the specified position, the claw 62 completely clamps and restrains the nozzle 100; then the rotating shaft 2 is driven to rotate by the rotating driving assembly, so as to drive the nozzle clamping mechanism to rotate, thereby the nozzle 100 can be screwed off from the laser cutting head or the nozzle 100 can be installed on the laser cutting head, the disassembly and replacement of the nozzle are realized. The nozzle 100 is clamped stably, safely and reliably, the time for automatically replacing the nozzle 100 is short, the work efficiency is high, and the disassembly and replacement of the nozzle 100 with various appearances, sizes and the like can be realized. It should be noted that the distance of the laser cutting head moving downward in the embodiment can be set according to the moving distance of the claw 62 and the moving guide rod 32, when the nozzle 100 needs to be replaced, the parameters and related control parameters of the nozzle 100 are input on the control system, so as to realize the purpose of automatically disassembling and replacing the corresponding nozzle 100.

[0061] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. A nozzle holding mechanism characterized by, The utility model relates to a kind of nozzle clamping device, including: Fixed support (1), inside is equipped with containing cavity (11), the side wall of the containing cavity (11) is equipped with notch (12); Rotary shaft (2), fixedly connected below the fixed support (1), the rotary shaft (2) is equipped with with the guiding hole (21) of communication with the containing cavity (11) in, the rotary shaft (2) is used for being connected with rotary drive assembly; Movable support (3), it is installed in the containing cavity (11), the movable support (3) includes support table (31) and the mobile guide rod (32) of being fixed to the bottom of the support table (31), the mobile guide rod (32) is slidably connected in the guiding hole (21); Elastic member (4), sleeve is connected on the mobile guide rod (32), the two ends of the elastic member (4) are respectively abutted on the bottom of the support table (31) and the top of the rotary shaft (2); Nozzle support (5), fixed on the support table (31), the nozzle support (5) is used for placing nozzle (100) in; Clamping assembly (6), including at least two connecting rods (61) and at least two clamping jaws (62) one by one, one end of each connecting rod (61) is hinged with the support table (31), and the other end is hinged with the corresponding clamping jaw (62) through the notch (12); Clamping jaw connecting seat (7), fixed above the fixed support (1), at least two radial tracks (71) are provided in the clamping jaw connecting seat (7), each clamping jaw (62) is slidably installed in each track (71), and each clamping jaw (62) can be close to each other to clamp the nozzle (100) with the movable support (3) moves down.

2. The nozzle clamp mechanism of claim 1, wherein The opening of the track (71) close to the nozzle (100) side is provided with a limiting portion (711), and the front end of the clamping jaw (62) is provided with a abutting portion (621), the abutting portion (621) is used for abutting with the nozzle (100) through the opening, and the limiting portion (711) is used for limiting the moving position of the clamping jaw (62).

3. The nozzle clamp mechanism of claim 1, wherein The mobile guide rod (32) is provided with a guide groove (321) extending in the axial direction, and the rotary shaft (2) is provided with a limiting screw (22) slidably matched with the guide groove (321) for limiting the moving position of the mobile guide rod (32).

4. The nozzle clamp mechanism of claim 1, wherein The support table (31) and the connecting rod (61) are hinged by a first pin (63) and a first snap spring (64), and the connecting rod (61) and the clamping jaw (62) are hinged by a second pin (65) and a second snap spring (66).

5. The nozzle clamp mechanism of claim 4, wherein, The support table (31) is in a cylindrical shape, and the outer side wall of the support table (31) is provided with a protruding part (311); the connecting rod (61) is in an "H" shape, including a support part (611), a first lug part (612) located at the lower end of the support part (611), and a second lug part (613) located at the upper end of the support part (611); the claw (62) includes a sliding block part (622) and a connecting part (623) located below the sliding block part (622), the sliding block part (622) is installed in the track (71), and the connecting part (623) penetrates the bottom of the track (71); the first pin (63) is provided through the protruding part (311) and the first lug part (612), and the first circlip (64) is installed on the first pin (63); the second pin (65) is provided through the second lug part (613) and the connecting part (623), and the second circlip (66) is installed on the second pin (65).

6. The nozzle holder mechanism according to any one of claims 1 to 5, characterized in that, The inner wall of the nozzle support (5) is in a conical surface, and the nozzle (100) is coaxially placed in the nozzle support (5).

7. The nozzle clamp mechanism of claim 6, wherein, The nozzle support (5), the movable support (3) and the rotating shaft (2) are coaxially arranged.

8. The nozzle holder mechanism according to any one of claims 1 to 5, characterized by The elastic member (4) is a compression spring.

9. The nozzle holder mechanism according to any one of claims 1 to 5, characterized in that, The claw connecting seat (7) and the fixed support (1) are fixed through the first fastener (8); the fixed support (1) and the rotating shaft (2) are fixed through the second fastener (9), and the second fastener (9) is perpendicular to the axis of the rotating shaft (2); the nozzle support (5) and the movable support (3) are fixed through the third fastener (10).

10. A device for automatically replacing a nozzle of a laser cutting head, comprising a laser cutting head, a nozzle (100) arranged at the bottom of the laser cutting head, a mounting seat located below the laser cutting head, and a rotary drive assembly, characterized in that, Further comprising the nozzle clamping mechanism as claimed in any one of claims 1-9, the nozzle clamping mechanism is installed on the mounting seat, the rotating drive assembly is connected with the rotating shaft (2) for driving the rotating shaft (2) to rotate.

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