Automatic surface mounting mechanism suitable for rubber-insulated wire lamp production line

Abstract

The invention belongs to the technical field of rubber-insulated wire lamp production, and relates to an automatic surface mounting mechanism suitable for a rubber-insulated wire lamp production line. The device comprises a fixed disc, a suction nozzle unit, a suction nozzle mounting unit and an adsorption unit, a mounting opening is formed in the middle of the fixed disc, and the adsorption unit is communicated with the mounting opening; the other side of the fixed disc is rotationally connected with a rotary disc, a plurality of suction nozzle units are circumferentially distributed on the side, away from the fixed disc, of the rotary disc, each suction nozzle unit comprises a spring rod, a connecting base and a suction nozzle, the spring rods are vertically arranged on the rotary disc, and the connecting bases are installed at the output ends of the spring rods. The suction nozzle can be automatically mounted and dismounted through rotation of the rotary table and stretching of the electric push rod, operation is easy and convenient, manpower is saved, and the production efficiency and the automation level of a rubber-covered wire lamp production line can be improved. And when the rotating disc rotates, air in the suction nozzles is sucked into the annular cavity, so that the suction nozzles are cleaned, and the suction nozzles are prevented from being blocked.

Description

Technical Field

[0001] The invention belongs to the technical field of leather wire lamp production, and relates to an automatic patch mechanism suitable for a leather wire lamp production line. Background Art

[0002] The production line of the leather wire lamp usually includes raw material preparation, wire processing, patch, welding, dispensing, curing, testing and packaging, etc., to achieve automated production from raw materials to finished products. The leather wire lamp patch refers to the installation of LED lamp beads on the flexible circuit board of the leather wire lamp through patch technology. This patch technology enables the LED lamp beads to fit tightly on the circuit board, thereby improving the performance and stability of the lamp.

[0003] When mounting different types of LED lamp beads on leather wire lamps, different types of nozzles need to be used. However, most of the nozzles are replaced manually, which increases the workload of manual workers and is not conducive to improving the automation level of the production line.

[0004] In order to solve the above problems, the present invention proposes an automatic patch mechanism suitable for a leather wire lamp production line. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes an automatic patch mechanism suitable for a leather wire lamp production line.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an automatic patch mechanism suitable for a leather wire lamp production line, comprising a fixed disk, a nozzle unit, a nozzle installation unit and an adsorption unit; one side of the fixed disk is installed on the robot arm through a fixed plate, and a mounting port is opened in the middle of the fixed disk, and the adsorption unit is connected to the mounting port; a turntable is rotatably connected to the other side of the fixed disk, and a plurality of nozzle units are distributed circumferentially on the side of the turntable away from the fixed disk, and the nozzle unit comprises a spring rod, a connecting seat and a nozzle, the spring rod is vertically arranged on the turntable, the connecting seat is installed at the output end of the spring rod, the connecting seat is rotatably connected to a connecting plate, and the nozzle is connected to the connecting plate; the nozzle installation unit comprises a ramp block and an electric push rod, the fixed disk is rotatably connected to a rotating seat, the rotating seat is fixedly connected to the electric push rod, the ramp block is connected to the output end of the electric push rod, and the electric push rod is arranged along the radial direction of the turntable;

[0007] The turntable rotates, causing the target suction nozzle to move to the side of the inclined plane block away from the axis of the fixed plate, causing the inclined plane block to move close to the connecting seat and lift the connecting seat, the suction nozzle unit moves up, and then the connecting plate rotates, causing the suction nozzle to be directly above the installation port, causing the turntable to rotate, and the suction nozzle is gradually screwed into the installation port.

[0008] Furthermore, an annular cavity is provided on the circumferential surface of the turntable, and a plurality of sockets are provided on the side of the turntable away from the fixed plate, and the plurality of sockets correspond one-to-one to the plurality of suction nozzle units. A first protrusion is provided at a position corresponding to the socket in the annular cavity, and a through hole connected to the socket is provided on the first protrusion. A second protrusion is fixedly provided at a position corresponding to the first protrusion in the annular cavity, and the first protrusion and the second protrusion are arranged opposite to each other, and the middle parts of the first protrusion and the second protrusion are both raised.

[0009] Furthermore, the suction nozzle and the mounting port are threadedly connected.

[0010] Furthermore, the connecting seat is rotatably mounted with a rotating shaft, one end of the connecting plate is fixedly connected to the rotating shaft, and a transmission assembly is arranged between the inclined plane block and the rotating shaft; the inclined plane block drives the rotating shaft to rotate through the transmission assembly.

[0011] Furthermore, the transmission assembly includes a rack, a second gear, a worm and a worm wheel, the rack is fixedly arranged on the bevel block, the second gear is rotatably installed on the connecting seat, the second gear cooperates with the rack, the rotating shaft is coaxially fixedly connected with the worm wheel, and the connecting seat is rotatably connected with a worm that meshes with the worm wheel; the second gear is coaxially fixedly connected with the first bevel gear, and the worm is coaxially fixedly connected with the second bevel gear that meshes with the first bevel gear.

[0012] Furthermore, the adsorption unit includes an air pump and a connecting pipe, the air pump is installed on the fixed plate, one end of the connecting pipe is connected to the suction end of the air pump, and the other end of the connecting pipe is connected to the installation port.

[0013] Furthermore, a motor is mounted on the fixed disk, an output shaft of the motor is fixedly connected to a first gear, and the rotating disk is fixedly connected to a rotating disk meshing with the first gear.

[0014] Furthermore, two positioning blocks are fixedly provided at positions corresponding to each nozzle unit, and the two positioning blocks are respectively arranged on both sides of the nozzle unit; when the inclined plane block is located between the two corresponding positioning blocks, the turntable drives the inclined plane block to rotate through the positioning blocks.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the installation and disassembly of the suction nozzle can be automatically completed by rotating the turntable and extending the electric push rod, the operation is simple and convenient, manpower is saved, and it is beneficial to improve the production efficiency and automation level of the leather wire lamp production line.

[0016] When the turntable rotates, the air in the annular cavity flows, and under the Venturi effect, an adsorption force is generated in the gap between the first protrusion and the second protrusion, and the air in the suction nozzle is sucked into the annular cavity, thereby cleaning the suction nozzle and preventing the suction nozzle from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the distribution of the nozzle unit in the present invention;

[0019] Figure 3 The present invention Figure 2 A magnified view of part A;

[0020] Figure 4 is a cross-sectional view of the fixed disk in the present invention;

[0021] Figure 5 The present invention Figure 4 A magnified view of part B;

[0022] Figure 6 It is a structural schematic diagram of the nozzle unit in the present invention;

[0023] Figure 7 It is a schematic diagram of the state in which the nozzle unit is located on the side of the inclined surface block away from the axis of the turntable in the present invention;

[0024] Figure 8 It is a schematic diagram of the state in which the connecting seat is located on the top surface of the inclined block in the present invention;

[0025] Fig. 9 It is a schematic diagram of the state in which the suction nozzle of the present invention is located directly above the installation port.

[0026] In the figure: 1, fixing plate; 2, fixing disk; 201, mounting column; 3, air pump; 4, connecting pipe; 5, motor; 6, first gear; 7, gear ring; 8, turntable; 9, suction nozzle; 10, rotating seat; 11, connecting plate; 12, inclined block; 13, first inclined surface; 14, second inclined surface; 15, positioning block; 16, electric push rod; 17, connecting seat; 18, rack; 19, first protrusion; 20, second protrusion; 21, spring rod; 22, second gear; 23, first bevel gear; 24, second bevel gear; 25, worm; 26, worm wheel; 27, rotating shaft; 28, mounting port; 29, socket. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 9 The automatic patch mechanism shown is suitable for a leather wire lamp production line.

[0029] Embodiment 1: The technical solution adopted by the present invention is as follows: The automatic patch mechanism suitable for the leather wire lamp production line includes a fixing plate 2, a suction nozzle unit, a suction nozzle installation unit and an adsorption unit.

[0030] A fixing plate 1 is installed on one side of the fixing plate 2. The fixing plate 2 is installed on the robot arm through the fixing plate 1. The robot arm drives the fixing plate 2 to move to complete the patch work.

[0031] The fixed disk 2 is rotatably connected to a rotating disk 8 on the side facing away from the fixed plate 1. The fixed disk 2 and the rotating disk 8 are coaxially arranged. A mounting column 201 is fixed to the middle of the fixed disk 2, and the rotating disk 8 is rotatably sleeved on the mounting column 201. A motor 5 is fixedly installed on the fixed disk 2, and the motor shaft of the motor 5 is coaxially fixedly connected to the first gear 6. A gear ring 7 is coaxially fixedly connected to the rotating disk 8, and the gear ring 7 is meshed with the first gear 6. The motor 5 drives the rotating disk 8 to rotate through the first gear 6 and the gear ring 7.

[0032] like Figure 4 As shown, the mounting post 201 is provided with a mounting opening 28, and the mounting opening 28 penetrates the fixed plate 2. The mounting opening 28 is coaxially arranged with the rotating plate 8.

[0033] The adsorption assembly includes an air pump 3 and a connecting pipe 4. The air pump 3 is mounted on the fixed plate 1, one end of the connecting pipe 4 is connected to the air suction end of the air pump 3, and the other end of the connecting pipe 4 is connected to the mounting port 28.

[0034] The suction nozzle unit is arranged on a side of the turntable 8 facing away from the fixed plate 2 . There are a plurality of suction nozzle units, and the plurality of suction nozzle units are distributed along the circumference of the axis of the turntable 8 .

[0035] Each nozzle unit includes a spring rod 21, a connecting seat 17 and a nozzle 9. Each nozzle unit includes two spring rods 21, which are vertically fixed on the turntable 8, and the telescopic end of the spring rod 21 is fixedly connected to the connecting seat 17. A rotating shaft 27 is rotatably mounted on the connecting seat 17. The rotating shaft 27 is fixedly connected to one end of the connecting plate 11, and the other end of the connecting plate 11 is connected to the nozzle 9. The connecting plate 11 is arranged along the radial direction of the turntable 8. When the connecting plate 11 rotates 180 degrees, the nozzle 9 is directly above the installation port 28.

[0036] The suction nozzle 9 and the installation port 28 are threadedly matched. Then one end of the suction nozzle 9 is screwed into the installation port 28, and the suction nozzle 9 is installed. The suction nozzle 9 is connected with the installation port 28. The suction nozzle 9 can adsorb the LED lamp bead through the adsorption unit, and then the mechanical arm drives the fixed plate 2 to move to complete the patch work.

[0037] The nozzle mounting unit is used to mount the nozzle 9 onto the mounting port 28. The nozzle mounting unit includes a ramp block 12 and an electric push rod 16. A rotating seat 10 is rotatably mounted on the mounting column 201, and there is a certain rotation damping between the rotating seat 10 and the mounting column 201. One end of the rotating seat 10 protrudes from the turntable 8, and the electric push rod 16 is fixedly connected to the rotating seat 10. The electric push rod 16 is arranged along the radial direction of the turntable 8, and the telescopic end of the electric push rod 16 is fixedly connected to the ramp block 12. There are two electric push rods 16, and the two electric push rods 16 are arranged on both sides of the ramp block 12. A second ramp 14 is provided on the side of the ramp block 12 close to the axis of the turntable 8, and a first ramp 13 is provided on the side of the ramp block 12 away from the second ramp 14.

[0038] Two positioning blocks 15 are fixedly arranged at the positions corresponding to each nozzle unit, and the two positioning blocks 15 are arranged on both sides of the nozzle unit. When the inclined plane block 12 is between the corresponding two positioning blocks 15, when the rotating disk 8 rotates, the rotating disk 8 drives the inclined plane block 12 to rotate through the positioning blocks 15.

[0039] A transmission assembly is provided between the bevel block 12 and the connecting plate 11. The transmission assembly includes a rack 18, a second gear 22, a worm 25 and a worm wheel 26. The rack 18 is fixedly provided on the bevel block 12. The second gear 22 is rotatably mounted on the connecting seat 17, and the second gear 22 cooperates with the rack 18. The rotating shaft 27 is coaxially fixedly connected with the worm wheel 26, and the connecting seat 17 is rotatably connected with the worm 25, and the worm 25 meshes with the worm wheel 26. The second gear 22 is coaxially fixedly connected with the first bevel gear 23, and the worm 25 is coaxially fixedly connected with the second bevel gear 24, and the second bevel gear 24 meshes with the first bevel gear 23.

[0040] The turntable 8 rotates, and the nozzle unit moves to the side of the inclined surface block 12 away from the axis of the turntable 8, and the electric push rod 16 is started, and the electric push rod 16 drives the inclined surface block 12 to move. When the rack 18 is engaged with the second gear 22, as the inclined surface block 12 moves, the second gear 22 rotates, the first bevel gear 23 rotates, the second bevel gear 24 rotates, the worm 25 drives the worm wheel 26 to rotate, the connecting plate 11 rotates, and then the connecting plate 11 drives the nozzle 9 to rotate, so that the nozzle 9 moves to the top of the installation port 28.

[0041] Working principle: the suction nozzle 9 is located on the side of the connecting plate 11 away from the installation opening 28. The electric push rod 16 is in a shortened state.

[0042] When the selected suction nozzle 9, i.e., the target suction nozzle 9, is installed on the installation opening 28, the motor 5 is started, the rotating disk 8 rotates relative to the fixed disk 2, and the suction nozzle unit rotates. Since there is a certain rotation damping between the rotating seat 10 and the installation column 201, the inclined surface block 12 remains stationary until the target suction nozzle 9 moves to the side of the inclined surface block 12 away from the installation column 201.

[0043] Then the electric push rod 16 is started to extend, the inclined plane block 12 moves away from the mounting column 201, and the inclined plane block 12 extends to the bottom of the corresponding connecting seat 17 through the first inclined plane 13. Under the action of the first inclined plane 13, as the inclined plane block 12 moves, the connecting seat 17 gradually moves upward, the spring rod 21 extends, and the connecting plate 11 and the target suction nozzle 9 move upward until the first protrusion 19 moves to the top surface of the inclined plane block 12. As the inclined plane block 12 moves, the rack 18 gradually approaches the second gear 22. When the rack 18 and the second gear 22 are engaged, as the inclined plane block 12 moves, the second gear 22 rotates, the second bevel gear 24 rotates, the worm gear 26 rotates, and the connecting plate 11 and the target suction nozzle 9 rotate around the rotating shaft 27. When the rack 18 and the second gear 22 are disengaged, the connecting plate 11 rotates exactly 180 degrees, and the target suction nozzle 9 is located directly above the mounting opening 28. The axis of the target suction nozzle 9 coincides with the axis of the mounting opening 28 .

[0044] Then, the inclined surface block 12 is moved further to be located between the two positioning blocks 15 . At this time, the connecting seat 17 is in contact with the second inclined surface 14 .

[0045] Then the motor 5 is started again to rotate the turntable 8, the nozzle unit rotates, the turntable 8 drives the inclined plane block 12 to rotate through the positioning block 15, so that the connecting plate 11 and the rotating seat 10 rotate around the axis of the turntable 8. The target nozzle 9 rotates around the axis of the turntable 8, and at the same time, the electric push rod 16 continues to extend, and the connecting seat 17 moves down, so that the target nozzle 9 is gradually screwed into the installation port 28, and then the target nozzle 9 is installed on the installation port 28, and the target nozzle 9 is connected with the connecting pipe 4 through the installation port 28.

[0046] When the suction nozzle 9 needs to be replaced, the suction nozzle 9 at the installation port 28 needs to be removed first. Specifically, the motor 5 is started, the turntable 8 rotates, and the suction nozzle unit and the suction nozzle installation unit rotate accordingly. The suction nozzle 9 in the installation port 28 rotates around the axis of the installation port 28, and then the suction nozzle 9 is gradually screwed out of the installation port 28. The electric push rod 16 is started to shorten the electric push rod 16, and the inclined plane block 12 moves toward the direction close to the axis of the turntable 8. The inclined plane block 12 gradually lifts the connecting seat 17 through the first inclined plane 13, and the connecting plate 11 and the suction nozzle 9 move up until the connecting seat 17 contacts the top surface of the inclined plane block 12. As the inclined plane block 12 moves, when the rack 18 and the second gear 22 are engaged, the second gear 22 rotates, the worm 25 rotates, and the worm wheel 26 rotates, so that the connecting plate 11 and the suction nozzle 9 rotate around the rotating shaft 27. When the rack 18 and the second gear 22 are disengaged, the connecting plate 11 and the suction nozzle 9 are just rotated 180 degrees, and the suction nozzle 9 returns to the initial position. The electric push rod 16 is further shortened, and the ramp block 12 returns to the initial position, and the suction nozzle unit returns to the initial state.

[0047] Afterwards, the turntable 8 is rotated to move the selected suction nozzle 9 to the side of the inclined surface block 12 away from the mounting column 201 , and then the suction nozzle 9 is installed on the mounting opening 28 .

[0048] The installation and removal of the suction nozzle 9 can be automatically completed by rotating the turntable 8 and extending the electric push rod 16. The operation is simple and convenient, saving manpower, and is conducive to improving the production efficiency and automation level of the leather wire lamp production line.

[0049] Embodiment 2: This embodiment is an improvement based on embodiment 1.

[0050] like Figure 4 , Figure 5 As shown, an annular cavity is provided on the circumferential surface of the rotating disk 8. A plurality of sockets 29 are provided on the side of the rotating disk 8 away from the fixed disk 2. The plurality of sockets 29 correspond to the plurality of suction nozzle units one by one, and the sockets 29 are adapted to the suction nozzles 9 in the corresponding suction nozzle units. When the suction nozzle 9 is located on the side of the suction nozzle unit away from the installation opening 28, the suction nozzle 9 is inserted into the socket 29. When the connecting seat 17 moves upward along the first inclined surface 13, the suction nozzle 9 gradually moves out of the socket 29.

[0051] A first protrusion 19 is fixedly provided at a position corresponding to the socket 29 in the installation cavity. A through hole connected to the socket 29 is opened on the first protrusion 19. The through hole is adapted to the suction nozzle 9. When the suction nozzle 9 is inserted into the socket 29, the through hole is connected to the suction nozzle 9.

[0052] A second protrusion 20 is fixedly installed in the installation cavity at a position corresponding to the first protrusion 19, and the second protrusion 20 is arranged opposite to the first protrusion 19. The middle parts of the second protrusion 20 and the first protrusion 19 are both raised. From the edge to the middle, the gap between the first protrusion 19 and the second protrusion 20 gradually decreases.

[0053] When the turntable 8 rotates, the air in the annular cavity flows relative to the turntable 8. When the air flows through the first protrusion 19 and the second protrusion 20, due to the Venturi effect, the flow rate of the air increases when it flows between the first protrusion 19 and the second protrusion 20. Adsorption force is generated between the first protrusion 19 and the second protrusion 20, so that the air in the suction nozzle 9 flows into the annular cavity through the perforation, thereby cleaning the suction nozzle 9. Since the suction nozzle 9 will absorb dust and other tiny particles in the air after long-term use. These impurities may enter the inside of the suction nozzle and gradually accumulate, causing the suction nozzle to be blocked. As the turntable 8 rotates, the suction nozzle 9 can be cleaned in time to avoid the occurrence of suction nozzle 9 blockage, which helps to ensure the smooth operation of the leather wire lamp growth line, and thus helps to improve the production efficiency of the leather wire lamp growth line.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Automatic patch mechanism suitable for leather wire lamp production line, characterized by: The invention comprises a fixed disk (2), a suction nozzle unit, a suction nozzle installation unit and a suction unit; one side of the fixed disk (2) is installed on the robot arm through a fixed plate (1); a mounting opening (28) is provided in the middle of the fixed disk (2); the suction unit is connected to the mounting opening (28); the other side of the fixed disk (2) is rotatably connected to a rotating disk (8); a side of the rotating disk (8) away from the fixed disk (2) is circumferentially distributed with a plurality of suction nozzle units; the suction nozzle unit comprises a spring rod (21), a connecting seat (17) and a suction nozzle (9); the spring rod (2 1) is vertically arranged on a rotating disk (8), a connecting seat (17) is installed at the output end of a spring rod (21), the connecting seat (17) is rotatably connected to a connecting plate (11), and a suction nozzle (9) is connected to the connecting plate (11); the suction nozzle installation unit comprises an inclined surface block (12) and an electric push rod (16), the fixed disk (2) is rotatably connected to a rotating seat (10), the rotating seat (10) is fixedly connected to the electric push rod (16), the inclined surface block (12) is connected to the output end of the electric push rod (16), and the electric push rod (16) is arranged along the radial direction of the rotating disk (8); The turntable (8) rotates, causing the target suction nozzle (9) to move to the side of the inclined surface block (12) away from the axis of the fixed disk (2), causing the inclined surface block (12) to move close to the connecting seat (17) and lift up the connecting seat (17), the suction nozzle unit moves upward, and then the connecting plate (11) rotates, causing the suction nozzle (9) to be located directly above the installation opening (28), causing the turntable (8) to rotate, and the suction nozzle (9) is gradually screwed into the installation opening (28).

2. The automatic patch mechanism for a leather-line lamp production line according to claim 1 is characterized in that: An annular cavity is provided on the circumferential surface of the turntable (8); a plurality of sockets (29) are provided on the side of the turntable (8) facing away from the fixed plate (1); the plurality of sockets (29) correspond to the plurality of suction nozzle units one by one; a first protrusion (19) is provided at a position corresponding to the socket (29) in the annular cavity; a through hole connected to the socket (29) is provided on the first protrusion (19); a second protrusion (20) is fixedly provided at a position corresponding to the first protrusion (19) in the annular cavity; the first protrusion (19) and the second protrusion (20) are arranged opposite to each other, and the middle parts of the first protrusion (19) and the second protrusion (20) are both raised.

3. The automatic patch mechanism for a leather-line lamp production line according to claim 1 is characterized in that: The suction nozzle (9) and the mounting port (28) are threadedly connected.

4. The automatic patch mechanism for a leather-line lamp production line according to claim 1 is characterized in that: The connecting seat (17) is rotatably mounted with a rotating shaft (27); one end of the connecting plate (11) is fixedly connected to the rotating shaft (27); a transmission assembly is provided between the inclined plane block (12) and the rotating shaft (27); and the inclined plane block (12) drives the rotating shaft (27) to rotate via the transmission assembly.

5. The automatic patch mechanism for a leather wire lamp production line according to claim 4 is characterized in that: The transmission assembly comprises a rack (18), a second gear (22), a worm (25) and a worm wheel (26); the rack (18) is fixedly arranged on the inclined plane block (12); the second gear (22) is rotatably mounted on the connecting seat (17); the second gear (22) cooperates with the rack (18); the rotating shaft (27) is coaxially fixedly connected with the worm wheel (26); the connecting seat (17) is rotatably connected with a worm (25) meshing with the worm wheel (26); the second gear (22) is coaxially fixedly connected with the first bevel gear (23); the worm (25) is coaxially fixedly connected with the second bevel gear (24) meshing with the first bevel gear (23).

6. The automatic patch mechanism for a leather wire lamp production line according to claim 1 is characterized in that: The adsorption unit comprises an air pump (3) and a connecting pipe (4); the air pump (3) is mounted on a fixed plate (1); one end of the connecting pipe (4) is connected to an air suction end of the air pump (3); and the other end of the connecting pipe (4) is connected to a mounting port (28).

7. The automatic patch mechanism for a leather-line lamp production line according to claim 1 is characterized in that: A motor (5) is mounted on the fixed disk (2); an output shaft of the motor (5) is fixedly connected to a first gear (6); and the rotating disk (8) is fixedly connected to a rotating disk (8) meshing with the first gear (6).

8. The automatic patch mechanism for a leather wire lamp production line according to claim 1 is characterized in that: Two positioning blocks (15) are fixedly arranged at positions corresponding to each suction nozzle unit, and the two positioning blocks (15) are arranged on both sides of the suction nozzle unit; when the inclined surface block (12) is located between the two corresponding positioning blocks (15), the rotating disk (8) drives the inclined surface block (12) to rotate through the positioning blocks (15).

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