Nozzle replacing device

Abstract

The utility model discloses a nozzle replacing device, which comprises a mounting seat, a nozzle and a driving device, the rotating shaft is arranged in the mounting hole in a penetrating manner and can rotate; the first clutch part and the second clutch part are arranged on the rotating shaft in a sleeving mode, the first clutch part can rotate along with the rotating shaft, and the adjacent ends of the first clutch part and the second clutch part are connected through clutch teeth; the rotating shaft is sleeved with the nozzle seat, the nozzle seat extends out of the rotating shaft, a limiting hole for containing a nozzle is formed in the side, away from the second clutch part, of the nozzle seat, and the nozzle seat and the second clutch part are connected through a limiting block and a limiting groove which are connected in an inserted mode; and the elastic piece is sleeved on the rotating shaft and is positioned between the nozzle seat and the second clutch part. When the device is used for installing the nozzle for the cutting head, the nozzle in the nozzle seat responds to the rotation of the rotating shaft until the friction force between the first clutch part and the second clutch part is smaller than the resilience force of the elastic piece, the second clutch part is separated from the first clutch part, and at the moment, the nozzle and the cutting head reach preset torque.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting machine technology, specifically a nozzle replacement device. Background Technology

[0002] Laser cutting, as a novel thermal cutting technology, boasts advantages such as high cutting speed, high production efficiency, good cut surface quality, small heat-affected zone, and environmental friendliness, making it one of the main methods for cutting metal sheets and gaining increasingly widespread application. However, in the production and processing of sheets of different thicknesses and materials, different types of nozzles must be installed on the laser cutting head to achieve normal operation. Current technologies often employ manual nozzle replacement; however, the laser cutting head is generally located within the processing area. Therefore, manually replacing the nozzles while the machine is running is extremely dangerous, and the equipment must be shut down and allowed to cool down during nozzle replacement, severely impacting processing efficiency. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a nozzle replacement device. Based on the clutch principle, the device connects a first clutch part and a second clutch part via clutch teeth, and an elastic element is provided between the second clutch part and the nozzle seat. When using this nozzle replacement device to install a nozzle on a cutting head, the drive device drives the rotating shaft to rotate the first clutch part. Under the action of the elastic element, the first and second clutch parts are connected via clutch teeth, and the nozzle seat and the second clutch part are connected via interlocking limiting blocks and limiting grooves. This allows the nozzle in the nozzle seat to respond to the rotation of the rotating shaft. As the torque between the nozzle and the cutting head increases, the second clutch part gradually slides away from the first clutch part until the friction between the first and second clutch parts is less than the rebound force of the elastic element. At this point, the second clutch part disengages from the first clutch part, and the nozzle and the cutting head reach the preset torque, completing the nozzle installation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a nozzle replacement device for replacing the nozzle of a laser cutting head, comprising:

[0005] Mounting base, wherein the mounting base is provided with at least one mounting hole;

[0006] A rotating shaft, which is rotatably inserted into the mounting hole;

[0007] A clutch device, comprising a first clutch part and a second clutch part sleeved on the rotating shaft, the first clutch part being connected to the rotating shaft and capable of rotating with the rotating shaft, the adjacent ends of the first clutch part and the second clutch part being connected by clutch teeth, and the first clutch part driving the second clutch part to rotate through the clutch teeth;

[0008] The nozzle seat has a limiting hole for fixing the nozzle. The nozzle seat is sleeved on the side of the second clutch part away from the first clutch part. The nozzle seat and the second clutch part are connected by mutually inserted limiting blocks and limiting grooves so that the nozzle seat can respond to the rotation of the second clutch part. The mutually inserted limiting blocks and limiting grooves are configured to have axial sliding space so that the second clutch part can slide axially along the rotation axis.

[0009] Furthermore, it also includes an elastic element, which is sleeved on the rotating shaft and disposed between the nozzle seat and the second clutch portion.

[0010] According to the above technical solution, the nozzle replacement device is based on the clutch principle. It has a first step and a second step with mutually cooperating inclined surfaces on the first clutch part and the second clutch part. An elastic element is provided between the second clutch part and the nozzle seat. When the nozzle is installed on the cutting head using the nozzle replacement device, the drive device drives the rotating shaft to rotate the first clutch part. Under the action of the elastic element, the inclined surfaces of the first step and the second step are in contact until the friction between the first step and the second step is less than the rebound force of the elastic element. The second clutch part will disengage from the first clutch part. At this time, the nozzle and the cutting head reach the preset torque, and the nozzle installation is completed.

[0011] Furthermore, the clutch teeth include:

[0012] A first step is provided at the first clutch part, the first step is distributed along the circumferential direction of the first clutch part, and the first side of the first step along the circumferential direction of the first clutch part is an inclined surface;

[0013] The second step is provided at the second clutch part, and the second side of the second step along the circumferential direction of the second clutch part is an inclined surface.

[0014] The first clutch part and the second clutch part realize the clutch principle through the inclined surfaces of the first step and the second step.

[0015] Furthermore, a bearing is provided within the mounting hole, and the rotating shaft abuts against the inner wall of the bearing. A first gear is provided at the end of the rotating shaft opposite to the nozzle seat, and the first gears of two adjacent rotating shafts mesh. The bearing can fix the position of the rotating shaft and enable the rotating shaft to rotate on its own. The first gear enables transmission between the rotating shafts.

[0016] Furthermore, a first through hole is provided between two adjacent mounting holes on the mounting base. A bearing is installed within the mounting holes and the first through hole. The rotating shaft abuts against the inner wall of the bearing. A first gear is provided at the end of the rotating shaft away from the nozzle seat. A second gear abuts against the inner wall of the bearing within the first through hole. The second gear meshes with two adjacent first gears. The bearing can fix the position of the rotating shaft and enable the rotating shaft to rotate. The first gear realizes the transmission function between the rotating shafts, and the second gear is used to ensure that the rotation direction of each rotating shaft is consistent.

[0017] Furthermore, the driving device includes a motor, and the drive shaft of the motor is provided with a drive gear, which meshes with any of the first gears. Under the drive of the motor, each of the rotating shafts rotates together with the gear.

[0018] Furthermore, one end of the rotating shaft near the nozzle seat extends radially along the rotating shaft to form a stop block, wherein the outer diameter of the stop block is greater than the inner diameter of the nozzle seat near the second clutch portion and greater than the outer diameter of the rotating shaft. The stop block prevents the nozzle seat from disengaging from the rotating shaft.

[0019] Furthermore, the housing includes a mounting base that divides the housing cavity into a first cavity and a second cavity. The first gear and the second gear are located in the second cavity. The top plate of the housing has a second through hole through which the nozzle seat passes. The housing is used to protect the mounting base, rotating shaft, first clutch, second clutch, nozzle seat, and elastic element within its cavity.

[0020] Furthermore, the housing is hinged to a cover that covers the portion of the nozzle seat that protrudes from the top plate. The cover is connected to a flip-top device, which automatically opens and closes under the action of the flip-top device. The cover protects the nozzle seat located outside the housing and the nozzle inside the nozzle seat.

[0021] Furthermore, the flip-top device includes:

[0022] A cylinder, which is connected to the outside of the housing;

[0023] A transmission rod, which is hinged to the drive end of the cylinder;

[0024] A transmission gear is rotatably connected to the housing via a first transmission shaft. The end of the transmission rod opposite to the cylinder is fixedly connected to the side of the transmission gear. Driven by the cylinder, the transmission rod causes the transmission gear to rotate around the first transmission shaft.

[0025] The second drive shaft is rotatably connected to the housing. The second drive shaft is provided with a third gear that meshes with the drive gear. The cover is fixedly connected to the second drive shaft.

[0026] Through the above technical solution, the extension and retraction of the cylinder can control the automatic opening and closing of the cover.

[0027] Furthermore, a buffer pad is provided on the outer side of the top plate of the housing. When the cover is closed, the buffer pad is located between the top plate and the cover. The buffer pad is used to cushion the nozzle during the closing process of the cover, preventing the cover from damaging the nozzle when it closes.

[0028] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0029] The nozzle replacement device disclosed in this application is based on the clutch principle. The first clutch part and the second clutch part are connected by clutch teeth, and an elastic element is provided between the second clutch part and the nozzle seat. When using this nozzle replacement device to install a nozzle on the cutting head, the drive device drives the rotating shaft to rotate the first clutch part. Under the action of the elastic element, the first clutch part and the second clutch part are connected by clutch teeth. The nozzle seat and the second clutch part are connected by interlocking limit blocks and limit grooves, so that the nozzle in the nozzle seat responds to the rotation of the rotating shaft. As the torque between the nozzle and the cutting head increases, the second clutch part gradually slides away from the first clutch part until the friction between the first clutch part and the second clutch part is less than the rebound force of the elastic element. At this time, the second clutch part disengages from the first clutch part. At this time, the nozzle and the cutting head reach the preset torque, and the nozzle installation is completed.

[0030] This application provides a second gear between the first gears of each rotating shaft, which ensures that the rotation direction of each rotating shaft is consistent when the rotating shaft is driven by a motor.

[0031] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the nozzle replacement device in this embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the interior of the nozzle replacement device housing in an embodiment of this utility model;

[0035] Figure 3 This is a schematic diagram of the overall structure of the first rotating shaft in an embodiment of this utility model;

[0036] Figure 4 This is a partial structural schematic diagram of the first rotating shaft in an embodiment of this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the first column in an embodiment of this utility model;

[0038] Figure 6 This is a schematic diagram of the structure of the second column in an embodiment of this utility model;

[0039] Figure 7 This is a schematic diagram of the nozzle seat in an embodiment of this utility model;

[0040] Figure 8 This is a schematic diagram of the flip-top device in an embodiment of this utility model.

[0041] The reference numerals in the above figures are as follows: 1. Housing; 11. Base; 12. Mounting seat; 13. Cover; 21. First rotating shaft; 211. First gear; 212. Stop block; 22. First column; 221. First step; 2211. First inclined surface; 23. Second column; 231. Second step; 2311. Second inclined surface; 232. Limiting groove; 24. Spring; 25. Nozzle seat; 251. Limiting block; 252. Limiting hole; 26. Second rotating shaft; 27. Motor; 31. Cylinder; 32. Transmission rod; 33. Transmission gear; 34. Second transmission shaft; 35. Third gear; 36. Buffer pad; 37. Outer shell. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] Example: Combining Figure 1-8 As shown, this embodiment discloses a nozzle replacement device for replacing the nozzle of a laser cutting head, comprising:

[0045] Shell 1, combined Figure 1-2 As shown, a base 11 is provided on the lower side of the housing 1, and the base 11 raises the housing 1.

[0046] The housing 1 has an inner cavity with a mounting base 12, which divides the inner cavity into a first cavity on the upper side and a second cavity on the lower side. The mounting base 12 has six mounting holes, spaced apart along its length. A first through hole is provided between two adjacent mounting holes. A bearing is installed in each mounting hole and the first through hole. A first rotating shaft 21 abuts against the inner wall of the bearing in the mounting hole, and a first gear 211 is fitted onto the portion of the first rotating shaft 21 located in the second cavity. Under the action of the bearing, the first rotating shaft 21 can rotate within the mounting hole. A second rotating shaft 26 abuts against the inner wall of the bearing in the first through hole, and a second gear is fitted onto the portion of the second rotating shaft 26 located in the second cavity. Each second gear meshes with two adjacent first gears 211.

[0047] A third through hole is provided on one side of the mounting hole at the outermost edge. A second rotating shaft 26 is provided in the third through hole. The second rotating shaft 26 is also provided with a second gear. The second gear meshes with the first gear 211 of the first rotating shaft 21 in the mounting hole.

[0048] Optionally, the first gears 211 of two adjacent first rotating shafts 21 mesh. This solution eliminates the need for the first through hole, the second rotating shaft 26, and the second gear, simplifying the fabrication of the overall device.

[0049] A fourth through hole is provided on the bottom plate of the housing 1. A motor 27 is installed inside the third through hole. A drive gear is provided on the rotating shaft of the motor 27, and the drive gear meshes with a second gear inside the third through hole. With the above scheme, the motor 27 can drive each of the first rotating shafts 21 to rotate, and the rotation direction of each of the first rotating shafts 21 is the same.

[0050] Optionally, the driving method of the motor 27 can be replaced by other common transmission methods such as chain drive.

[0051] The portion of the first rotating shaft 21 located in the first cavity is provided with a clutch device, which includes a first clutch portion and a second clutch portion sequentially sleeved on the first rotating shaft 21. Figure 5As shown in this application, the first clutch part is a first column 22 disposed around the first rotating shaft 21. The first column 22 and the first rotating shaft 21 are fixedly connected, that is, the first column 22 can rotate with the first rotating shaft 21. The first column 22 has four first steps 221 on the side opposite to the mounting hole. The four first steps 221 are evenly distributed along the circumference of the first column 22, and the first side of the first step 221 along the circumference of the first column is a first inclined surface 2211.

[0052] like Figure 6 As shown, the second clutch part is a second column 23 sleeved on the first rotating shaft 21. The second column 23 can slide along the axial direction of the first rotating shaft 21. The second column 23 is located on the side of the first column 22 away from the mounting hole. The side of the second column 23 facing the first column 22 has four second steps 231 that respectively cooperate with the first step 221. The four second steps 231 are evenly spaced along the circumference of the second column 23, and the second side of the second step 231 along the circumference of the second column 23 is a second inclined surface 2311. It should be noted that the first inclined surface 2211 of the first step 221 and the second inclined surface 2311 of the second step 231 can completely fit together. When the first column 22 rotates with the first rotating shaft 21, under the action of the friction between the first inclined surface 2211 and the second inclined surface 2311, the second column 23 rotates together with the first column 22. The second column 23 has three limiting grooves 232 at one end away from the first column 22, and the three limiting grooves 232 are evenly distributed along the circumference of the second column 23.

[0053] A nozzle seat 25 is also fitted onto the portion of the first rotating shaft 21 located in the first cavity. The nozzle seat 25 is slidable along the axial direction of the first rotating shaft 21 and is located on the side of the second column 23 opposite to the first column 22. A spring 24 is provided between the nozzle seat 25 and the second column 23, and the spring 24 is fitted onto the first rotating shaft 21. Figure 7 As shown, the nozzle seat 25 has three limiting blocks 251 at one end facing the second column 23, which respectively cooperate with the three limiting grooves 232 of the second column 23. The limiting blocks 251 can be inserted into the limiting grooves 232 so that the nozzle seat 25 responds to the rotation of the second column 23. The nozzle seat 25 extends from the end of the first rotating shaft 21 on the side away from the second column 23. The nozzle seat 25 has a limiting hole 252 on the side away from the second column 23. The inner wall of the limiting hole 252 is set into a polygon that matches the shape of the nozzle so that the nozzle responds to the rotation of the nozzle seat 25.

[0054] Optionally, the limiting groove 232 can be disposed on the inner side wall of the second column 23, and the limiting groove 232 extends along the axial direction of the first rotation shaft 21. Correspondingly, the limiting block 251 can be disposed on the outer side wall of the nozzle seat 25, and the limiting block 251 also extends along the axial direction of the first rotation shaft 21. The limiting block 251 can slide along the axial direction of the first rotation shaft 21 within the limiting groove 232.

[0055] The top plate of the housing 1 is provided with six second through holes that are respectively opposite to the mounting holes, and each of the nozzle seats 25 punches out of the inner cavity of the housing 1 through the second through holes.

[0056] Optionally, one end of the first rotating shaft 21 near the nozzle seat 25 extends radially along the first rotating shaft 21 to form a stop block 212, wherein the outer diameter of the stop block 212 is greater than the inner diameter of the nozzle seat 25 near the second column 23 and greater than the outer diameter of the first rotating shaft 21. The stop block 212 can prevent the nozzle seat 25 from disengaging from the first rotating shaft 21.

[0057] The process of installing a nozzle on the cutting head of a laser cutting machine using the above-mentioned nozzle replacement device is as follows:

[0058] The cutting head is moved so that it is aligned with the nozzle in the limiting hole 252 of the nozzle seat 25. The motor 27 moves clockwise, driving the first rotating shaft 21 to rotate clockwise. Kinetic energy is transmitted sequentially through the first column 22, the second column 23, the nozzle seat 25, and the nozzle, ultimately causing the nozzle to rotate clockwise relative to the cutting head, thus tightening the nozzle onto the cutting head. During the rotation of the nozzle, influenced by the torque between the nozzle and the cutting head, the second column 23 slides along the first rotating shaft 21 toward the side away from the first column 22 until the friction between the first inclined surface 2211 of the first step 221 and the second inclined surface 2311 of the second step 231 is less than the restoring force of the spring 24. At this point, the nozzle and the cutting head reach the preset torque, and the nozzle installation is complete.

[0059] The process of removing the nozzle from the cutting head of a laser cutting machine using the above-mentioned nozzle replacement device is as follows:

[0060] The cutting head is moved so that the nozzle on it is placed in the limiting hole 252. The motor 27 moves in a counterclockwise direction, driving the first rotating shaft 21 to rotate counterclockwise. Kinetic energy is transmitted sequentially by the first column 22, the second column 23, the nozzle seat 25, and the nozzle, eventually causing the nozzle to rotate counterclockwise relative to the cutting head until the nozzle is completely detached from the cutting head, and the nozzle disassembly is completed.

[0061] Optionally, a cover 13 is hinged to one side of the top plate of the housing 1. The cover 13 covers the portion of the nozzle seat 25 that protrudes from the top plate. The cover 13 is connected to a flip-top device, which allows the cover 13 to open and close automatically. The cover 13 is used to protect the nozzle seat 25 located outside the housing 1 and the nozzle inside the nozzle seat 25.

[0062] like Figure 8 As shown, the flip-top device includes:

[0063] Cylinder 31, which is connected to the outside of the housing 1;

[0064] The transmission rod 32 is hinged to the drive end of the cylinder 31;

[0065] The transmission gear 33 is rotatably connected to the housing 1 via a first transmission shaft. The end of the transmission rod 32 facing away from the cylinder 31 is fixedly connected to the side of the transmission gear 33. Under the drive of the cylinder 31, the transmission rod 32 causes the transmission gear 33 to rotate around the first transmission shaft.

[0066] The second drive shaft 34 is rotatably connected to the housing 1. The second drive shaft 34 is provided with a third gear 35, which meshes with the drive gear 33. The cover 13 is fixedly connected to the second drive shaft 34.

[0067] Through the above technical solution, the extension and retraction of the cylinder 31 can control the automatic opening and closing of the cover 13.

[0068] Optionally, a buffer pad 36 is provided on the outer side of the top plate of the housing 1. When the cover 13 is closed, the buffer pad 36 is located between the top plate and the cover 13. The buffer pad 36 is used to cushion the nozzle during the closing process of the cover 13, preventing the cover 13 from damaging the nozzle when it closes.

[0069] Optionally, the flip cover device is provided with a housing 37 on the outside to protect the flip cover device.

[0070] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A nozzle replacement device for replacing nozzles in a laser cutting head, characterized in that, include: Mounting base, wherein the mounting base is provided with at least one mounting hole; A rotating shaft, which is rotatably inserted into the mounting hole; A clutch device, comprising a first clutch part and a second clutch part sleeved on the rotating shaft, the first clutch part being connected to the rotating shaft and capable of rotating with the rotating shaft, the adjacent ends of the first clutch part and the second clutch part being connected by clutch teeth, and the first clutch part driving the second clutch part to rotate through the clutch teeth; The nozzle seat has a limiting hole for fixing the nozzle. The nozzle seat is sleeved on the side of the second clutch part away from the first clutch part. The nozzle seat and the second clutch part are connected by mutually inserted limiting blocks and limiting grooves so that the nozzle seat can respond to the rotation of the second clutch part. The mutually inserted limiting blocks and limiting grooves are configured to have axial sliding space so that the second clutch part can slide axially along the rotation axis.

2. The nozzle replacement device as described in claim 1, characterized in that, It also includes an elastic element, which is sleeved on the rotating shaft and disposed between the nozzle seat and the second clutch portion.

3. The nozzle replacement device as described in claim 1 or 2, characterized in that, The clutch teeth include: A first step is provided at the first clutch part, the first step is distributed along the circumferential direction of the first clutch part, and the first side of the first step along the circumferential direction of the first clutch part is an inclined surface; A second step is provided at the second clutch part, and the second side of the second step along the circumferential direction of the second clutch part is an inclined surface, and the inclined surface of the first step and the inclined surface of the second step can fit together.

4. The nozzle replacement device as described in claim 2, characterized in that, A bearing is provided in the mounting hole, the rotating shaft abuts against the inner wall of the bearing, and a first gear is provided at the end of the rotating shaft away from the nozzle seat. The first gears of two adjacent rotating shafts mesh.

5. The nozzle replacement device as described in claim 2, characterized in that, A first through hole is provided between two adjacent mounting holes on the mounting base. A bearing is provided in the mounting hole and the first through hole. The rotating shaft abuts against the inner wall of the bearing. A first gear is provided at the end of the rotating shaft away from the nozzle seat. A second gear abuts against the inner wall of the bearing in the first through hole. The second gear meshes with two adjacent first gears.

6. The nozzle replacement device as described in claim 4 or 5, characterized in that, The rotating shaft is connected to a driving device, and under the action of the driving device, the rotating shaft rotates within the mounting hole. The driving device includes a motor, and the drive shaft of the motor is provided with a drive gear, which meshes with any of the first gears.

7. The nozzle replacement device according to claim 1 or 2, characterized in that, The end of the rotating shaft near the nozzle seat extends radially along the rotating shaft to form a stop block, wherein the outer diameter of the stop block is greater than the inner diameter of the nozzle seat near the second clutch portion and is greater than or equal to the outer diameter of the rotating shaft.

8. The nozzle replacement device as described in claim 5, characterized in that, The device includes a housing, wherein the mounting base divides the inner cavity of the housing into a first cavity and a second cavity, the first gear and the second gear are located in the second cavity, and the top plate of the housing is provided with a second through hole for the nozzle seat to pass through; The housing is hinged to a cover that covers the portion of the nozzle seat that protrudes from the top plate. The cover is connected to a flip-top device that allows the cover to open and close automatically.

9. The nozzle replacement device as claimed in claim 8, characterized in that, The flip-top device includes: A cylinder, which is connected to the outside of the housing; A transmission rod, which is hinged to the drive end of the cylinder; A transmission gear is rotatably connected to the housing via a first transmission shaft. The end of the transmission rod opposite to the cylinder is fixedly connected to the side of the transmission gear. Driven by the cylinder, the transmission rod causes the transmission gear to rotate around the first transmission shaft. The second drive shaft is rotatably connected to the housing. The second drive shaft is provided with a third gear that meshes with the drive gear. The cover is fixedly connected to the second drive shaft.

10. The nozzle replacement device as claimed in claim 8 or 9, characterized in that, A buffer pad is provided on the outer side of the top plate of the housing. When the cover is closed, the buffer pad is located between the top plate and the cover.

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