Sheet metal laser cutting device

Abstract

This invention provides a sheet metal laser cutting device, belonging to the field of sheet metal laser cutting technology. It includes a support plate, a clamping assembly, a laser cutting head, a driving assembly, and a collecting assembly. The support plate has a U-shaped structure. The clamping assembly is installed on the inner wall of the support plate for clamping sheet metal parts. The laser cutting head and the collecting assembly are disposed inside the support plate. The driving assembly is installed on the inner wall of the support plate and drives the laser cutting head and the collecting assembly to move. When the laser cutting head moves, it emits a laser beam towards the sheet metal part to cut it. When the collecting assembly moves, it collects the fumes generated during the cutting process. Compared with existing technologies, this invention can collect cutting fumes during laser cutting of sheet metal parts, thereby reducing the escape of cutting fumes and improving the safety and protection during sheet metal cutting.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal laser cutting technology, specifically a sheet metal laser cutting device. Background Technology

[0002] Laser cutting of sheet metal is a high-precision metal cutting method. Its working principle involves a laser beam irradiating the workpiece surface, releasing energy that melts or evaporates the material. Simultaneously, high-pressure gas coaxial with the beam blows the molten material away, creating a kerf. Compared to other cutting methods, laser cutting offers significant advantages such as high precision, fast cutting speed, good flexibility, no need for molds, smooth cuts, small heat-affected zone, and high material utilization. It can be applied to the sheet metal cutting process for products such as machine tool guards and machine tool housings.

[0003] Machine tool protective covers are used to protect machine tool guideways. They can protect the internal hardened guideways, linear guideways, ball screws, or transmission racks of the machine tool from external corrosion and damage. The machine tool housing is the external structural shell of the machine tool, mainly used to support and fix internal components, and to provide mechanical strength, sealing, and appearance integrity, thus forming the shape of the machine tool.

[0004] When processing machine tool protective covers and machine tool housings, larger sheet metal raw materials need to be cut into smaller sheet metal parts according to predetermined dimensions. These smaller sheet metal parts then undergo precision processing to allow them to form a cover-like structure through welding or riveting. In the initial material sorting stage, straight-line cutting is the primary method. Currently, the cutting of larger sheet metal raw materials mostly relies on saw blade cutting devices or laser cutting devices. Although laser cutting devices are more expensive than saw blade cutting devices, they offer advantages such as lower noise and higher safety when cutting sheet metal parts. Therefore, laser cutting devices are significantly more practical. In existing technologies, when laser cutting devices cut sheet metal parts, a laser beam is emitted by a laser generator, and the laser cutting head delivers the laser beam to the sheet metal part to achieve melting and cutting. However, the melting process easily generates a large amount of cutting fumes. These fumes, carrying a large amount of particulate matter, can easily escape into the surrounding environment and be inhaled by workers, affecting their physical and mental health. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a sheet metal laser cutting device.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A sheet metal laser cutting device includes a support plate, a clamping assembly, a laser cutting head, a driving assembly, and a collecting assembly.

[0008] The support plate has a U-shaped structure, and the clamping assembly is installed on the inner wall of the support plate for clamping sheet metal parts.

[0009] The laser cutting head and the collecting assembly are disposed inside the support plate.

[0010] The drive assembly is mounted on the inner wall of the support plate and is used to move the laser cutting head and the collecting assembly.

[0011] As the laser cutting head moves, it emits a laser beam towards the sheet metal part to cut it.

[0012] The collection component collects the fumes generated during sheet metal cutting as it moves.

[0013] As a further improvement of the present invention: the driving assembly includes a first motor, a lead screw, a guide rod, a first slider, and a second slider.

[0014] The first motor is fixedly installed on the side wall of the support plate. One end of the lead screw is connected to the output end of the first motor, and the other end passes through the first slider and is threadedly engaged with the first slider. The second slider is fixedly installed on one side of the first slider. The guide rod is fixedly installed on the inner wall of the support plate. The second slider is slidably sleeved on the outside of the guide rod. The laser cutting head is fixedly installed at the bottom of the first slider.

[0015] As a further improvement of the present invention: the collection component includes a traction block and a telescopic airbag.

[0016] The traction blocks are provided in two sets, which are arranged vertically opposite each other and are fixedly connected by connecting blocks. Each set of traction blocks has corresponding through holes. The telescopic airbags are provided in two sets, with one end of each set connected to the inner wall of the support plate and the other end connected to the two sets of traction blocks respectively.

[0017] Both sets of traction blocks have linear air channels and annular air channels inside. One end of the linear air channel is connected to the annular air channel, and the other end is connected to the inner cavity of the telescopic airbag. Several air inlets connected to the annular air channels are opened on the inner wall of the through hole. The laser cutting head is positioned above the upper set of traction blocks, and the laser emitting end of the laser cutting head extends into the through hole on the upper set of traction blocks. The outer wall of the laser cutting head is fixedly connected to the upper set of traction blocks by a connecting rod.

[0018] As a further improvement of the present invention: a purification component is also provided on the side wall of the support plate, the purification component being used to purify the cutting fumes inside the two sets of telescopic airbags.

[0019] As a further improvement of the present invention: the purification assembly includes an exhaust pipe, a purification cylinder, a main gas supply pipe, a first gas supply pipe, and a second gas supply pipe.

[0020] The purification cylinder is fixedly installed on the outer wall of the support plate. An activated carbon purification layer is provided inside the purification cylinder. The exhaust pipe is located at one end of the purification cylinder, and the main gas supply pipe is located at the other end of the purification cylinder. One end of the first gas supply branch pipe is connected to the main gas supply pipe, and the other end is connected to the inner cavity of one of the sets of telescopic airbags. One end of the second gas supply branch pipe is connected to the main gas supply pipe, and the other end is connected to the inner cavity of another set of telescopic airbags. One-way valves are provided inside the linear air passage, the first gas supply branch pipe, and the second gas supply branch pipe.

[0021] As a further improvement of the present invention: the clamping assembly includes a U-shaped seat and a screw, the U-shaped seat is fixedly installed on the inner wall of the support plate, and the screw is threadedly engaged with the U-shaped seat.

[0022] As a further improvement of the present invention: a grinding component is also provided on a set of traction blocks located below. When the traction blocks below move against the lower surface of the sheet metal part, the grinding component is used to grind and remove the metal slag deposited on the lower surface of the sheet metal part.

[0023] As a further improvement of the present invention: a groove is formed on the upper part of the lower traction block, and a channel communicating with the groove is formed on the side wall of the lower traction block.

[0024] The grinding assembly includes a grinding wheel, a first pulley, a transmission belt, a second pulley, and a second motor.

[0025] The grinding wheel is rotatably mounted inside the groove via a rotating shaft. The first pulley is fixedly mounted outside the rotating shaft. The second motor is fixedly mounted on the outer wall of the traction block below. The second pulley is mounted on the output end of the second motor. One end of the transmission belt is sleeved outside the second pulley, and the other end extends from the channel into the inside of the groove and is sleeved with the first pulley.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] In this embodiment of the invention, when laser cutting is required for sheet metal parts, the sheet metal parts can be placed inside the support plate and clamped by the clamping assembly. Then, the driving assembly drives the laser cutting head and the collecting assembly to move. When the laser cutting head moves, it emits a laser beam towards the sheet metal parts, thereby achieving the cutting of the sheet metal parts. When the collecting assembly moves, it collects the fumes generated during the cutting process, thereby reducing the phenomenon of fumes escaping and polluting the surrounding environment, reducing the probability of fumes being inhaled by the human body, and improving the safety and protection of sheet metal parts during laser cutting. Compared with the prior art, when laser cutting sheet metal parts, the cutting fumes can be collected, thereby reducing the escape of cutting fumes and improving the safety and protection of sheet metal parts during cutting. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of a sheet metal laser cutting device. Figure 1 ;

[0029] Figure 2 A schematic diagram of the structure of a sheet metal laser cutting device. Figure 2 ;

[0030] Figure 3 A schematic diagram of the structure of a sheet metal laser cutting device. Figure 3 ;

[0031] Figure 4 A schematic diagram of the structure of a sheet metal laser cutting device. Figure 4 ;

[0032] Figure 5 for Figure 1 Enlarged view of region A in the middle;

[0033] Figure 6 for Figure 2 Enlarged view of region B in the middle;

[0034] Figure 7 for Figure 3 Enlarged diagram of region C in the middle;

[0035] In the diagram: 10-Support plate, 20-Clamping assembly, 201-U-shaped seat, 202-Screw, 30-Laser cutting head, 301-Connecting rod, 40-Drive assembly, 401-First motor, 402-Lead screw, 403-Guide rod, 404-First slider, 405-Second slider, 50-Collection assembly, 501-Traction block, 502-Linear airway, 503-Telescopic airbag, 504-Annular airway, 505-Passive tube. 506 - Air inlet, 507 - Connecting block, 508 - Groove, 509 - Channel, 60 - Purification component, 601 - Exhaust pipe, 602 - Purification cylinder, 603 - Main air supply pipe, 604 - First air supply branch pipe, 605 - Second air supply branch pipe, 70 - Grinding component, 701 - Grinding wheel, 702 - First pulley, 703 - Transmission belt, 704 - Shaft, 705 - Second pulley, 706 - Second motor. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 This embodiment provides a sheet metal laser cutting device, including a support plate 10, a clamping assembly 20, a laser cutting head 30, a driving assembly 40, and a collecting assembly 50. The support plate 10 has a U-shaped structure. The clamping assembly 20 is installed on the inner wall of the support plate 10 for clamping sheet metal parts. The laser cutting head 30 and the collecting assembly 50 are disposed on the inner side of the support plate 10. The driving assembly 40 is installed on the inner wall of the support plate 10 for driving the laser cutting head 30 and the collecting assembly 50 to move. When the laser cutting head 30 moves, it emits a laser beam towards the sheet metal parts to cut them. When the collecting assembly 50 moves, it collects the fumes generated during the cutting of the sheet metal parts.

[0039] When laser cutting is required for sheet metal parts, the sheet metal parts can be placed inside the support plate 10 and clamped by the clamping component 20. Then, the drive component 40 drives the laser cutting head 30 and the collecting component 50 to move. When the laser cutting head 30 moves, it emits a laser beam towards the sheet metal parts, thereby achieving the cutting of the sheet metal parts. When the collecting component 50 moves, it collects the fumes generated during the cutting process, thereby reducing the phenomenon of fumes escaping and polluting the surrounding environment, reducing the probability of fumes being inhaled by the human body, and improving the safety and protection of sheet metal parts during laser cutting.

[0040] Please see Figure 1 In one embodiment, the drive assembly 40 includes a first motor 401, a lead screw 402, a guide rod 403, a first slider 404, and a second slider 405. The first motor 401 is fixedly mounted on the side wall of the support plate 10. One end of the lead screw 402 is connected to the output end of the first motor 401, and the other end passes through the first slider 404 and is threadedly engaged with the first slider 404. The second slider 405 is fixedly disposed on one side of the first slider 404. The guide rod 403 is fixedly mounted on the inner wall of the support plate 10, and the second slider 405 is slidably sleeved on the outside of the guide rod 403. The laser cutting head 30 is fixedly mounted on the bottom of the first slider 404.

[0041] After the clamping assembly 20 clamps the sheet metal part, the first motor 401 drives the lead screw 402 to rotate. When the lead screw 402 rotates, it drives the first slide block 404 to move along the length direction of the lead screw 402 through the threaded engagement with the first slider 404 and the sliding engagement between the second slider 405 and the guide rod 403. When the first slider 404 moves, it drives the laser cutting head 30 to move along the upper part of the sheet metal part, thereby performing laser cutting on the sheet metal part.

[0042] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 as well as Figure 6In one embodiment, the collection component 50 includes traction blocks 501 and telescopic airbags 503. Two sets of traction blocks 501 are arranged vertically opposite each other and are fixedly connected by connecting blocks 507. Each set of traction blocks 501 has corresponding through holes 505. Two sets of telescopic airbags 503 are also provided, with one end connected to the inner wall of the support plate 10 and the other end connected to the two sets of traction blocks 501 respectively. Each set of traction blocks 501 has a linear air passage 502 inside. And an annular airway 504, one end of the linear airway 502 is connected to the annular airway 504, and the other end is connected to the inner cavity of the telescopic airbag 503. A plurality of air inlets 506 connected to the annular airway 504 are provided on the inner wall of the through hole 505. The laser cutting head 30 is positioned above a group of traction blocks 501 located above, and the laser emitting end of the laser cutting head 30 extends into the through hole 505 on the group of traction blocks 501. The outer wall of the laser cutting head 30 is fixedly connected to the group of traction blocks 501 located above through a connecting rod 301.

[0043] When the first motor 401 drives the lead screw 402 to rotate, thereby moving the laser cutting head 30 above the sheet metal part, the laser cutting head 30 drives the upper traction block 501 to move synchronously via the connecting rod 301. As the upper traction block 501 moves, it drives the lower traction block 501 to move synchronously via the connecting block 507. When the laser cutting head 30 moves, it emits a laser beam into the through hole 505 on the upper traction block 501. The laser beam acts on the upper surface of the sheet metal part, thus cutting it. After cutting, a cutting kerf is formed. The connecting block 507 enters the cutting kerf and moves along it. The upper traction block 501 moves against the upper surface of the sheet metal part, and the lower traction block 501 moves against the lower surface. As the upper and lower traction blocks 501 move, they pull the corresponding telescopic airbags 503, causing the airbags 503 to extend. When the upper telescopic airbag 503 extends, it will be positioned above the sheet metal part. Air is drawn from the air inlet 506 on the upper traction block 501 into the corresponding annular air passage 504, then from the annular air passage 504 into the corresponding linear air passage 502, and finally through the corresponding linear air passage 502 into the upper telescopic airbag 503. During this process, the air carries the cutting fumes generated above the sheet metal part into the upper telescopic airbag 503, thereby collecting the cutting fumes above the sheet metal part. When the lower telescopic airbag 503 extends, air located below the sheet metal part is drawn from the air inlet 506 on the lower traction block 501 into the corresponding annular air passage 504, then from the annular air passage 504 into the corresponding linear air passage 502, and finally through the corresponding linear air passage 502 into the lower telescopic airbag 503. During this process, the air carries the cutting fumes generated below the sheet metal part into the lower telescopic airbag 503, thereby collecting the cutting fumes below the sheet metal part.

[0044] Please see Figure 4 In one embodiment, a purification component 60 is further provided on the side wall of the support plate 10. The purification component 60 is used to purify the cutting fumes inside the two sets of telescopic airbags 503. Specifically, the purification component 60 includes an exhaust pipe 601, a purification cylinder 602, a main gas supply pipe 603, a first gas supply pipe 604, and a second gas supply pipe 605. The purification cylinder 602 is fixedly installed on the outer wall of the support plate 10, and an activated carbon purification layer is provided inside the purification cylinder 602. The exhaust pipe 601 is disposed on the purification cylinder 602. At one end of the purification cylinder 602, the main gas supply pipe 603 is located at the other end of the purification cylinder 602. One end of the first gas supply branch pipe 604 is connected to the main gas supply pipe 603, and the other end is connected to the inner cavity of one of the sets of telescopic airbags 503. One end of the second gas supply branch pipe 605 is connected to the main gas supply pipe 603, and the other end is connected to the inner cavity of another set of telescopic airbags 503. One-way valves (not shown in the figure) are provided inside the linear air passage 502, the first gas supply branch pipe 604, and the second gas supply branch pipe 605.

[0045] The laser cutting head 30 drives two sets of traction blocks 501 to move to perform laser cutting on the sheet metal parts and to collect the fumes. The two sets of telescopic airbags 503 are stretched. At this time, the one-way valves in the linear air passages 502 inside the two sets of traction blocks 501 open, while the one-way valves inside the first air supply branch pipe 604 and the second air supply branch pipe 605 close. Outside air, carrying the cutting fumes, smoothly enters the telescopic airbags 503 through the air inlet 506, the annular air passage 504, and the linear air passage 502. After the sheet metal parts are cut, the first single-machine 401 drives the lead screw 402 to rotate in the opposite direction, thereby driving the laser cutting head 30 and the two sets of traction blocks 501 to move in the opposite direction. When the traction block 501 moves in the reverse direction, it drives the two sets of telescopic airbags 503 to compress. At this time, the one-way valve inside the linear air passage 502 is closed, and the one-way valves inside the first gas supply branch pipe 604 and the second gas supply branch pipe 605 are opened. The flue gas inside the two sets of telescopic airbags 503 is compressed into the gas supply main pipe 603 through the first gas supply branch pipe 604 and the second gas supply branch pipe 605, respectively. Then, it enters the purification cylinder 602 through the gas supply main pipe 603 and is finally discharged from the exhaust pipe 601. During this process, the flue gas passes through the activated carbon layer inside the purification cylinder 602. The activated carbon layer adsorbs particulate matter and odors in the flue gas, thereby achieving the purification treatment of the cut flue gas.

[0046] Please see Figure 1 In one embodiment, the clamping assembly 20 includes a U-shaped seat 201 and a screw 202. The U-shaped seat 201 is fixedly installed on the inner wall of the support plate 10, and the screw 202 is threadedly engaged with the U-shaped seat 201.

[0047] By placing the edge of the sheet metal part inside the U-shaped seat 201 and then rotating the screw 202, the sheet metal part is pressed against the inner wall of the U-shaped seat 201, thereby achieving the clamping and fixing of the sheet metal part.

[0048] Please see Figure 3 In one embodiment, a grinding component 70 is also provided on a set of traction blocks 501 located below. When the traction blocks 501 below move against the lower surface of the sheet metal part, the grinding component 70 is used to grind and remove the metal slag deposited on the lower surface of the sheet metal part, thereby improving the cutting quality.

[0049] Please see Figure 6 as well as Figure 7In one embodiment, a groove 508 is formed on the upper part of the lower traction block 501, and a channel 509 communicating with the groove 508 is formed on the side wall of the lower traction block 501. The grinding assembly 70 includes a grinding wheel 701, a first pulley 702, a transmission belt 703, a second pulley 705, and a second motor 706. The grinding wheel 701 is rotatably mounted inside the groove 508 via a rotating shaft 704. The first pulley 702 is fixedly disposed outside the rotating shaft 704. The second motor 706 is fixedly disposed on the outer wall of the lower traction block 501. The second pulley 705 is mounted on the output end of the second motor 706. One end of the transmission belt 703 is sleeved outside the second pulley 705, and the other end extends from the channel 509 into the groove 508 and is sleeved with the first pulley 702.

[0050] When the lower traction block 501 moves against the lower surface of the sheet metal part, the second motor 706 drives the second pulley 705 to rotate. When the second pulley 705 rotates, it drives the first pulley 702 to rotate, which in turn drives the rotating shaft 704 and the grinding wheel 701 to rotate. When the grinding wheel 701 rotates, it acts on the lower surface of the sheet metal part, thereby grinding and removing the metal slag deposited on the lower surface of the sheet metal part to improve the laser cutting quality of the sheet metal part.

[0051] In this embodiment of the invention, when laser cutting is required for sheet metal parts, the sheet metal parts can be placed inside the support plate 10 and clamped by the clamping component 20. Then, the driving component 40 drives the laser cutting head 30 and the collecting component 50 to move. When the laser cutting head 30 moves, it emits a laser beam towards the sheet metal parts, thereby achieving the cutting of the sheet metal parts. When the collecting component 50 moves, it collects the fumes generated during the cutting process, thereby reducing the phenomenon of fumes escaping and polluting the surrounding environment, reducing the probability of fumes being inhaled by the human body, and improving the safety and protection of sheet metal parts during laser cutting. Compared with the prior art, when laser cutting sheet metal parts, the cutting fumes can be collected, thereby reducing the phenomenon of cutting fumes escaping and improving the safety and protection of sheet metal parts during cutting.

[0052] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sheet metal laser cutting device, characterized in that, Includes a support plate, clamping assembly, laser cutting head, drive assembly, and collection assembly. The support plate has a U-shaped structure, and the clamping assembly is installed on the inner wall of the support plate for clamping sheet metal parts. The laser cutting head and the collecting assembly are disposed inside the support plate. The drive assembly is mounted on the inner wall of the support plate and is used to move the laser cutting head and the collecting assembly. As the laser cutting head moves, it emits a laser beam towards the sheet metal part to cut it. The collection component collects the fumes generated during sheet metal cutting as it moves.

2. The sheet metal laser cutting device according to claim 1, characterized in that, The drive assembly includes a first motor, a lead screw, a guide rod, a first slider, and a second slider. The first motor is fixedly installed on the side wall of the support plate. One end of the lead screw is connected to the output end of the first motor, and the other end passes through the first slider and is threadedly engaged with the first slider. The second slider is fixedly installed on one side of the first slider. The guide rod is fixedly installed on the inner wall of the support plate. The second slider is slidably sleeved on the outside of the guide rod. The laser cutting head is fixedly installed at the bottom of the first slider.

3. The sheet metal laser cutting device according to claim 1, characterized in that, The collection assembly includes a traction block and a telescopic airbag. The traction blocks are provided in two sets, which are arranged vertically opposite each other and are fixedly connected by connecting blocks. Each set of traction blocks has corresponding through holes. The telescopic airbags are provided in two sets, with one end of each set connected to the inner wall of the support plate and the other end connected to the two sets of traction blocks respectively. Both sets of traction blocks have linear air channels and annular air channels inside. One end of the linear air channel is connected to the annular air channel, and the other end is connected to the inner cavity of the telescopic airbag. Several air inlets connected to the annular air channels are opened on the inner wall of the through hole. The laser cutting head is positioned above the upper set of traction blocks, and the laser emitting end of the laser cutting head extends into the through hole on the upper set of traction blocks. The outer wall of the laser cutting head is fixedly connected to the upper set of traction blocks by a connecting rod.

4. The sheet metal laser cutting device according to claim 3, characterized in that, A purification component is also provided on the side wall of the support plate, which is used to purify the cutting fumes inside the two sets of telescopic airbags.

5. A sheet metal laser cutting device according to claim 4, characterized in that, The purification assembly includes an exhaust pipe, a purification cylinder, a main gas supply pipe, a first gas supply pipe, and a second gas supply pipe. The purification cylinder is fixedly installed on the outer wall of the support plate. An activated carbon purification layer is provided inside the purification cylinder. The exhaust pipe is located at one end of the purification cylinder, and the main gas supply pipe is located at the other end of the purification cylinder. One end of the first gas supply branch pipe is connected to the main gas supply pipe, and the other end is connected to the inner cavity of one of the sets of telescopic airbags. One end of the second gas supply branch pipe is connected to the main gas supply pipe, and the other end is connected to the inner cavity of another set of telescopic airbags. One-way valves are provided inside the linear air passage, the first gas supply branch pipe, and the second gas supply branch pipe.

6. The sheet metal laser cutting device according to claim 1, characterized in that, The clamping assembly includes a U-shaped seat and a screw. The U-shaped seat is fixedly installed on the inner wall of the support plate, and the screw is threadedly engaged with the U-shaped seat.

7. A sheet metal laser cutting device according to claim 3, characterized in that, A grinding component is also provided on the lower set of traction blocks. When the lower traction blocks move against the lower surface of the sheet metal part, the grinding component is used to grind and remove the metal slag deposited on the lower surface of the sheet metal part.

8. A sheet metal laser cutting device according to claim 7, characterized in that, The lower traction block has a groove on its upper part, and a channel communicating with the groove is formed on the side wall of the lower traction block. The grinding assembly includes a grinding wheel, a first pulley, a transmission belt, a second pulley, and a second motor. The grinding wheel is rotatably mounted inside the groove via a rotating shaft. The first pulley is fixedly mounted outside the rotating shaft. The second motor is fixedly mounted on the outer wall of the traction block below. The second pulley is mounted on the output end of the second motor. One end of the transmission belt is sleeved outside the second pulley, and the other end extends from the channel into the inside of the groove and is sleeved with the first pulley.

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