Workpiece jacking and conveying mechanism and method and laser cutting device

Abstract

The invention relates to a workpiece jacking and conveying mechanism and method and a laser cutting device. The workpiece jacking and conveying mechanism comprises a conveying roller, the two ends of the conveying roller are slidably connected with a supporting seat through vertical sliding grooves, the supporting seat is fixed to the end of a supporting frame, the supporting frame is fixedly arranged, and at least one end of the conveying roller is connected with a power mechanism through a transmission mechanism; the two ends of the conveying roller are hinged to the top end of the lifting piece, the bottom end of the lifting piece is hinged to one end of the lever, the other end of the lever extends into a cavity in the lifting base, the lifting base is connected with a hydraulic cylinder fixed to the supporting frame, the non-end set position of the lever is hinged to the bottom end of the connecting rod, and the top end of the connecting rod is fixedly connected with the supporting frame. By the adoption of the jacking conveying mechanism, the working efficiency is improved, and meanwhile workpieces with larger weight can be lifted.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting equipment, and particularly relates to a workpiece lifting and conveying mechanism, method and laser cutting device. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] At present, the workpiece lifting and conveying mechanism device used in supporting laser cutting machines can only lift and convey small-sized workpieces. It uses air to push the cylinder to transmit power, and the lifted and conveyed workpieces are light in weight. The annual production quality tonnage of the using manufacturers is relatively low, unable to meet the normal production requirements. With the rapid development of laser cutting machines, the size of the workpieces cut by laser cutting machines is getting larger and larger, and the weight of the lifted and conveyed workpieces is getting heavier and heavier. The currently used workpiece lifting and conveying mechanism device supporting laser cutting machines cannot meet the normal production needs.

[0004] Patent application CN118455760A discloses a hydraulic workpiece lifting and transmission device and method for a laser cutting machine, including a rack assembly, a lifting assembly, a motor assembly and a sprocket assembly, which is applicable to workpieces with extra-long dimensions and large masses, improving the work efficiency. Compared with the existing transmission devices, it has a wider range of use and higher work efficiency.

[0005] In the technical solution of the above patent application, after a workpiece is conveyed, it is necessary to wait for the lifting assembly to return to the feeding end driven by the sprocket assembly before the next workpiece can be conveyed. Using this method requires waiting for the lifting assembly to return, reducing the work efficiency. Moreover, a hydraulic cylinder is used to lift the workpiece through a lifting plate, and the load borne by the hydraulic cylinder is the weight of the workpiece. For workpieces exceeding the load capacity of the hydraulic cylinder, the hydraulic cylinder cannot lift them normally, and it is necessary to increase the number of hydraulic cylinders to meet the lifting requirements, increasing the cost of equipment improvement. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a workpiece lifting and conveying mechanism, method and laser cutting device, which improve the work efficiency. On the premise of using the same load hydraulic cylinder as the existing workpiece lifting and transmission device, it can lift workpieces with a larger weight and has a wider range of use.

[0007] To achieve the above purpose, the present invention is realized through the following technical solutions: In a first aspect, an embodiment of the present invention provides a workpiece lifting and conveying mechanism, which includes conveying rollers. Both ends of the conveying rollers are slidably connected to the support seats through vertical sliding grooves. The support seats are fixed to the ends of the support frames, and the support frames are fixedly arranged. At least one end of the conveying rollers is connected to the power mechanism through a transmission mechanism. Both ends of the conveying rollers are hinged to the top ends of the lifting members, the bottom ends of the lifting members are hinged to one end of a lever, the other end of the lever extends into the cavity inside the lifting seat, the lifting seat is connected to a hydraulic cylinder fixed to the support frame, and a set position at a non-end portion of the lever is hinged to the bottom end of a connecting rod, and the top end of the connecting rod is fixedly connected to the support frame.

[0008] Optionally, the end of the lever connected to the lifting member is the first end, and the end connected to the lifting seat is the second end. The distance between the position where the connecting rod is connected to the lever and the first end is less than the distance between the position where the connecting rod is connected to the lever and the second end.

[0009] Optionally, the lifting seat includes a lifting block with an inverted U-shaped structure. The end of the lever extends into the internal space of the lifting block, and the bottom open end of the lifting block is provided with a cover plate for sealing.

[0010] Optionally, the bottom end of the connecting rod is provided with a double ear seat, and the lever is rotatably connected to the bottom end of the connecting rod through a pin shaft and the double ear seat.

[0011] Optionally, both ends of the conveying roller are rotatably connected to the bearing seats through bearings, and the bearing seats are fixedly connected to the top ends of the lifting members.

[0012] Optionally, the hydraulic cylinder is installed at the middle position of the bottom surface of the support frame.

[0013] Optionally, the power mechanism includes a motor, the motor is connected to a speed reducer, and the output shaft of the speed reducer is connected to the end of the conveying roller through a transmission mechanism.

[0014] Optionally, the transmission mechanism adopts a chain transmission mechanism or a synchronous belt transmission mechanism.

[0015] In a second aspect, an embodiment of the present invention provides a working method for the workpiece lifting and conveying mechanism described in the first aspect: the piston rod of the hydraulic cylinder extends, acts on one end of the lever through the lifting seat, the lever rotates around the connection position with the connecting rod, the other end of the lever drives the lifting member to rise, the lifting member drives the conveying roller to rise, lifts the workpiece on the conveying roller, the power mechanism drives the conveying roller to rotate through the transmission mechanism, conveys the workpiece, and after the conveying is completed, the piston rod of the hydraulic cylinder contracts, the lever rotates, and the lever drives the conveying roller to descend through the lifting member.

[0016] In a third aspect, an embodiment of the present invention provides a laser cutting device, which includes a material rack, the material rack is provided with at least two disconnection positions, and the workpiece lifting and conveying mechanism described in the first aspect is provided at the disconnection positions.

[0017] The beneficial effects of the present invention are as follows: In the workpiece lifting and conveying mechanism of the present invention, conveyor rollers are used to convey workpieces. Driven by a power mechanism and a transmission mechanism, the conveyor rollers can rotate, thereby realizing the conveyance of workpieces. Therefore, the conveyor rollers can convey workpieces without moving along the conveying direction. Thus, after a workpiece is conveyed and the conveyor rollers descend, new workpieces to be conveyed can be conveyed immediately without waiting for the conveying components to return to their original positions, improving the conveying efficiency of workpieces and thus enhancing the production efficiency. At the same time, through the setting of the lever, on the one hand, a single hydraulic cylinder can be used to lift the conveyor rollers, eliminating the need to install hydraulic cylinders on both sides of the conveyor rollers, saving equipment investment. On the other hand, the lever plays a role in saving effort. Compared with traditional workpiece lifting and conveying mechanisms, under the premise of using hydraulic cylinders of the same specification, workpieces of greater weight can be lifted. The method of using a lever to enhance the load-bearing capacity of the conveying mechanism replaces the method of using multiple hydraulic cylinders to improve the load-bearing capacity of the conveying mechanism, reducing equipment costs and improving the applicability of the entire lifting and conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] Figure 1 is the overall structure schematic diagram of Embodiment 1 of the present invention Figure 1 ; Figure 2 is the present invention Figure 1 partial enlarged view of A in; Figure 3 is the overall structure schematic diagram of Embodiment 1 of the present invention Figure 2 ; Figure 4 is the present invention Figure 3 partial enlarged view of B in; Wherein, 1. hydraulic station, 2. hydraulic pipeline, 3. workpiece, 4. support frame, 5. support seat, 6. lifting plate, 7. lever, 8. connecting rod, 9. pin shaft, 10. double ear seat, 11. pin shaft, 12. hydraulic cylinder, 13. lifting block, 14. cover plate, 15. conveyor roller, 16. bearing seat, 17. driven belt pulley, 18. end cover, 19. bearing, 20. motor, 21. mounting seat, 22. driving belt pulley, 23. transmission chain, 24. material rack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] For the convenience of description, in the present invention, if the words "upper" and "lower" appear, they only indicate the same direction as the upper and lower directions of the attached drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0020] Embodiment 1 This embodiment provides a workpiece lifting and conveying mechanism, as Figures 1 - 4 shown, which includes a conveying roller 15. The conveying roller 15 can rotate around its own axis and is used to support the workpiece 3. When the conveying roller 15 rotates, it can drive the workpiece 3 to move to realize the conveyance of the workpiece 3. Both ends of the conveying roller 15 are slidably connected to the support seat 5 through vertical chutes provided on the support seat 5, and the conveying roller 15 can move up and down vertically. The support seat 5 is fixed at the end of the support frame 4, and the support frame 4 is fixedly arranged. At least one end of the conveying roller 15 is connected to the power mechanism through a transmission mechanism, and the power mechanism can drive the conveying roller to rotate around its own axis through the transmission mechanism. In this embodiment, one end of the conveying roller 15 on one side is connected to the power mechanism through a transmission mechanism. The conveying roller 15 is also connected to a lifting mechanism, and the lifting mechanism is used to drive the conveying roller 15 to lift. The lifting mechanism adopts a lifting member. The top end of the lifting member is hinged to the end of the conveying roller 15, and the bottom end of the lifting member is hinged to one end of a lever 7. The other end of the lever 7 extends into the internal cavity of the lifting seat. At a set position of the non-end part of the lever 7, it is hinged to the bottom end of a connecting rod 8, and the top end of the connecting rod 8 is fixedly connected to the support frame 4. The connection position between the lever 7 and the connecting rod 8 is the fulcrum, and the lever 7 can rotate around the fulcrum. The top surface of the lifting seat is fixedly connected to the bottom end of the piston rod of the hydraulic cylinder 12, and the top surface of the cylinder body of the hydraulic cylinder 12 is fixed to the bottom surface of the support frame 4.

[0021] The conveying roller 15 includes a roller body. Roller shafts are coaxially provided at both end faces of the roller body. The roller shafts pass through the support 5 through the vertical chutes. The two end faces of the roller body are respectively in contact with the two support seats 5, so as to limit the axial direction of the conveying roller. The roller shafts are slidably connected to the vertical chutes to enable the conveying roller 15 to move vertically up and down. At the same time, the vertical chutes do not prevent the roller shafts and the roller body from rotating around their own axes. The vertical chutes play a guiding role in the lifting movement of the conveying roller 15.

[0022] The support seat 5 includes a rectangular bottom plate. Side plates are provided at the four edges of the top surface of the bottom plate. Among them, the side plate perpendicular to the axis of the conveying roller 15 and close to the roller body is provided with a vertical chute matching the roller shaft, and the roller shaft is slidably connected to the side plate through the vertical chute. Another side plate perpendicular to the axis of the conveying roller 15 is provided with a vertical chute matching the bearing seat 16, and the bearing seat 16 is slidably connected to this side plate through the vertical chute.

[0023] The side plates with vertical slides matching the roller shafts are fixed to the top surface of the end of the support frame 4 through a connecting seat. The connecting seat includes a horizontal plate fixed to the top surface of the support frame 4, the horizontal plate is fixed to the outer side of the side plate, and a stiffening plate is provided between the horizontal plate and the outer side of the side plate.

[0024] The end portion of the roller shaft extending outward from the support seat is rotatably connected to the bearing seat 16 via a bearing 19, so that the roller shaft and the roller body can rotate around their own axis.

[0025] The outer shell of the bearing seat 16 is connected to the lifting mechanism, and the lifting mechanism can drive the conveying roller 15 to move up and down through the bearing seat 16.

[0026] The roller shaft at one end of the conveying roller 15 is connected to the power mechanism through a transmission mechanism, and the power mechanism can drive the conveying roller to rotate around its own axis through the transmission mechanism.

[0027] In this embodiment, the power mechanism utilizes a motor 20. The output shaft of the motor 20 is connected to a reducer, which is fixed to a mounting base 21. The mounting base 21 is fixedly positioned. The output shaft of the reducer is connected to the roller shaft at one end of the conveyor roller 15 via a transmission mechanism. The motor transmits power to the roller shaft via the reducer and transmission mechanism, driving the entire conveyor roller 15 to rotate about its axis.

[0028] In this embodiment, the transmission mechanism adopts a chain transmission mechanism or a synchronous belt transmission mechanism, preferably a chain transmission mechanism, which includes a driving sprocket 22 installed on the output shaft of the reducer, a driven sprocket 17 installed on the roller shaft, and a transmission chain 23 wrapped around the driving sprocket 22 and the driven sprocket 17.

[0029] An end cover 18 is provided on the roller shaft at the outer side of the driven sprocket for positioning the driven sprocket 17 .

[0030] When the lifting mechanism drives the conveying roller 15 to the lowest position, the transmission chain 23 is in a relaxed state. When the conveying roller 15 is raised to the highest position, the transmission chain 23 is in a taut state, which facilitates the transmission of power. Those skilled in the art can achieve this by designing the length of the transmission chain, which will not be described in detail here.

[0031] With this arrangement, when the lifting mechanism drives the conveying roller 15 to rise to the highest position, the transmission chain 23 can still transmit power from the driving sprocket 22 to the driven sprocket 17.

[0032] A support frame 4 is provided below the conveying roller 15 , and a support seat 5 is fixed to an end of the support frame 4 .

[0033] In this embodiment, the support frame 4 is made of channel steel, and the support seat 15 is fixed to the end of the top surface of the support frame.

[0034] The lifting mechanism includes a hydraulic cylinder 12. The cylinder block of the hydraulic cylinder 12 is fixed at the middle position of the bottom surface of the support frame 4. A lifting seat is fixed at the bottom end of the piston rod of the hydraulic cylinder 12. The lifting seat includes a lifting block 13 with an inverted U-shaped structure. A cover plate 14 is provided at the open bottom end of the inverted U-shaped lifting block 13, and the open bottom end of the inverted U-shaped lifting block 13 is blocked by the cover plate 14.

[0035] Levers 7 are provided on both sides of the lifting seat. The two levers 7 are symmetrically distributed with respect to the center of the lifting seat. One end of the lever 7 extends into the inner space of the lifting block 13, and the lifting movement of the lifting block 13 can drive the lifting of this end of the lever 7.

[0036] In this embodiment, the lever 7 adopts a plate-like structure, which is convenient for connecting with the lifting member.

[0037] The other end of the lever 7 is hinged to the bottom end of the lifting member. In this embodiment, the lifting member adopts a lifting plate 6. The lifting plate 6 is composed of two groups of parallel plates. Pins are provided between the top and bottom ends of the two plates. The bottom end of the lifting plate 6 is hinged to the end of the lever 7 through a pin 11, and the top end of the lifting plate 6 is rotatably connected to the connecting plate provided on the outer shell of the bearing seat 16 through a pin 9.

[0038] The lever 7 is rotatably connected to the bottom end of the connecting rod 8 at a set position other than the end. The connection position between the lever 7 and the connecting rod 8 serves as the fulcrum of the lever 7. The lever 7 can rotate around the fulcrum, thereby driving the bearing seat 16 to perform vertical lifting movement through the lifting plate 6.

[0039] In this embodiment, the end of the lever 7 connected to the lifting plate 6 is defined as the first end, the end of the lever 7 extending into the inner space of the lifting block 13 is defined as the second end, and the connection position between the connecting rod 8 and the lever 7 is the fulcrum of the lever 7. The distance between the fulcrum and the first end is less than the distance between the lever 7 and the second end, so that when the hydraulic cylinder 12 drives the conveyor roller 15 to lift through the lever 7, the lever 7 plays a role in saving effort and reduces the load on the hydraulic cylinder 12.

[0040] The top end of the connecting rod 8 is fixedly connected to the support frame 4. Specifically, the top end of the connecting rod 8 passes through the support frame 4. Fixing nuts are threadedly connected to the connecting rod parts on both sides of the support frame 4, and the two fixing nuts are pressed against the surface of the support frame 4, thereby realizing the fixation of the connecting rod 8 and the support frame 4.

[0041] A double-ear seat 10 is fixed to the bottom end of the connecting rod 8 through a nut 9. The double-ear seat 10 can adopt the existing technology and includes a horizontal plate fixed to the bottom end of the connecting rod. Vertical plates are provided at both ends of the horizontal plate, and a pin shaft 11 is provided between the two vertical plates. The fulcrum position of the lever 7 is rotatably connected to the pin shaft 11, thereby realizing the rotational connection between the bottom end of the connecting rod 8 and the lever 7.

[0042] The hydraulic cylinder 12 is connected to the hydraulic station 1 through a hydraulic pipeline 2. The hydraulic station 1 supplies oil to the hydraulic cylinder 12 to drive the operation of the hydraulic cylinder 12. The hydraulic station 1 and its connection mode with the hydraulic cylinder 12 through the hydraulic pipeline 2 can adopt the existing technology and will not be described in detail here.

[0043] Embodiment 2 This embodiment provides a working method of the workpiece lifting and conveying mechanism described in Embodiment 1: The workpiece 3 to be conveyed is H-shaped steel, I-shaped steel, channel steel, L-shaped steel, equal-angle steel, unequal-angle steel, square steel, rectangular steel, round steel, long plate, etc.

[0044] In the normal state, the piston rod of the hydraulic cylinder 12 contracts, the two levers 7 are in a horizontal state, the lifting plate 6 is in a vertical state, the roller is at the bottommost end of the vertical chute, and the height of the top of the conveying roller 15 is lower than or flush with the top surface of the rack. At this time, the incoming workpiece 3 falls onto the surface of the rack.

[0045] When it is necessary to convey the workpiece 3, the piston rod of the hydraulic cylinder 12 extends, driving the lifting seat to move downward. At this time, driven by the lifting seat, the lever 7 rotates, one end of the lever 7 descends, and the other end rises. Thus, the bearing seat 16 is lifted through the lifting plate 6. The bearing seat 16 drives the entire conveying roller 15 to rise, and the conveying roller 15 drives the workpiece 3 to rise. The workpiece 3 is separated from the rack, and the motor 20 operates. The motor 20 drives the conveying roller 15 to rotate around its own axis through a chain drive mechanism to convey the workpiece 3.

[0046] When the workpiece 3 reaches the target position, the motor 20 stops operating, the piston rod of the hydraulic cylinder 12 retracts, the lever 7 returns to the horizontal state, and at the same time, the lifting plate 6 drives the bearing seat 16 to descend, and the lifting plate 6 returns to the vertical state. The roller falls back to the bottom end of the vertical chute again, and the workpiece 3 falls onto the surface of the rack.

[0047] At this time, the next workpiece 3 to be conveyed can be fed into the workpiece lifting and conveying mechanism of this embodiment and conveyed by the same method.

[0048] With the workpiece lifting and conveying mechanism of this embodiment, the conveyor roller 15 is used to convey the workpiece 3. Driven by the power mechanism and the chain drive mechanism, the conveyor roller 15 can rotate, thus realizing the conveyance of the workpiece 3. Therefore, compared with the workpiece lifting and transmission device disclosed in the patent application CN118455760A, the conveyor roller 15 can convey the workpiece 3 without moving along the conveying direction. Therefore, after a workpiece 3 is conveyed and the conveyor roller 15 descends to the in-place position, the new workpiece 3 to be conveyed can immediately enter the workpiece lifting and conveying mechanism for conveyance without waiting for the conveying component to return to its position, improving the conveying efficiency of the workpiece 3 and thus the production efficiency. At the same time, through the setting of the lever 7, on the one hand, only one hydraulic cylinder 12 is needed to lift the conveyor roller 15, without setting hydraulic cylinders on both sides of the conveyor roller 15, saving equipment investment and reducing equipment costs. On the other hand, the lever 7 plays a role in saving effort. Compared with the traditional workpiece lifting and conveying mechanism, on the premise of using the same specification hydraulic cylinder 12, a workpiece 3 with a greater weight can be lifted. The method of using the lever 7 to improve the load-bearing capacity of the conveying mechanism replaces the method of using multiple hydraulic cylinders to improve the load-bearing capacity of the conveying mechanism, reducing equipment costs and improving the applicability of the entire lifting and conveying mechanism.

[0049] Embodiment 3 This embodiment provides a laser cutting device, which includes a material rack 24. The material rack 24 is provided with at least two discontinuous positions, and at each discontinuous position, there is the workpiece lifting and conveying mechanism described in Embodiment 1. Through the two workpiece lifting and conveying mechanisms, the stable support and conveyance of the workpiece 3 can be realized by using the principle that two points determine a straight line. Those skilled in the art can set the number and positions of the discontinuous positions according to the length of the workpiece 3 and other actual needs, and no detailed description will be given here. The support frame 4 is fixedly connected to the material rack 24 or the support frame 4 is fixed on other fixedly arranged external frames. The mounting seat 21 is fixed on the ground foundation or fixedly connected to the material rack 24. When the conveyor roller 15 is in the lowest position, the top of the conveyor roller 15 is below the top surface of the material rack 24 or flush with the top surface of the material rack 24. At this time, the workpiece 3 can fall onto the surface of the material rack 24. When the conveyor roller 15 is in the highest position, the top height of the conveyor roller 15 is higher than the top surface height of the material rack 24. At this time, the conveyor roller 15 can lift the workpiece 3, causing the workpiece 3 to be separated from the top surface of the material rack 24, thus realizing the conveyance of the workpiece 3 by using the conveyor roller 15.

[0050] The remaining structures of the laser cutting device can adopt the technology of existing laser cutting machines, and no detailed description will be given here.

[0051] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A workpiece lifting and conveying mechanism, characterized in that, It includes conveying rollers. Both ends of the conveying rollers are slidably connected to the support seats through vertical chutes. The support seats are fixed at the ends of the support frames, and the support frames are fixedly arranged. At least one end of the conveying rollers is connected to the power mechanism through a transmission mechanism. Both ends of the conveying rollers are hinged to the top ends of the lifting members. The bottom ends of the lifting members are hinged to one end of the lever. The other end of the lever extends into the cavity inside the lifting seat. The lifting seat is connected to the hydraulic cylinder fixed to the support frame. The non-end set position of the lever is hinged to the bottom end of the connecting rod, and the top end of the connecting rod is fixedly connected to the support frame.

2. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, The end of the lever connected to the lifting member is the first end, and the end connected to the lifting seat is the second end. The distance between the position where the connecting rod is connected to the lever and the first end is less than the distance between it and the second end.

3. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, The lifting seat includes a lifting block with an inverted U-shaped structure. The end of the lever extends into the internal space of the lifting block, and a cover plate is provided at the open bottom end of the lifting block for blocking.

4. The workpiece lifting and conveying mechanism according to claim 1, wherein, The bottom end of the connecting rod is provided with a double-ear seat, and the lever is rotatably connected to the bottom end of the connecting rod through a pin shaft and the double-ear seat.

5. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, Both ends of the conveying roller are rotatably connected to the bearing seats through bearings, and the bearing seats are fixedly connected to the top ends of the lifting members.

6. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, The hydraulic cylinder is installed at the middle position of the bottom surface of the support frame.

7. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, The power mechanism includes a motor. The motor is connected to a speed reducer, and the output shaft of the speed reducer is connected to the end of the conveying roller through a transmission mechanism.

8. The workpiece lifting and conveying mechanism according to claim 1, characterized in that, The transmission mechanism adopts a chain transmission mechanism or a synchronous belt transmission mechanism.

9. A working method of the workpiece lifting and conveying mechanism according to any one of claims 1-8, characterized in that, When the piston rod of the hydraulic cylinder extends, it acts on one end of the lever through the lifting seat. The lever rotates around the connection position with the connecting rod. The other end of the lever drives the lifting member to rise. The lifting member drives the conveying roller to rise, lifting the workpiece on the conveying roller. The power mechanism drives the conveying roller to rotate through the transmission mechanism to convey the workpiece. After the conveying is completed, the piston rod of the hydraulic cylinder contracts, the lever rotates, and the lever drives the conveying roller to descend through the lifting member.

10. A laser cutting device, comprising a material rack, characterized in that, The material rack is provided with at least two disconnection positions, and the workpiece lifting and conveying mechanism according to any one of claims 1-8 is provided at the disconnection positions.

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