Tail end tool for loading and unloading cartons in carriage

Abstract

A tail end tool for loading and unloading cartons in a carriage comprises an adsorption unit, a vacuum generation unit, a sliding unit, a connecting plate, a cross arm, a spring rod and a mounting plate, the adsorption unit is communicated with an air outlet of the spring rod, the spring rod is arranged on the mounting plate and communicated with the vacuum generation unit, and an air outlet of the vacuum generation unit is communicated with an air inlet of the spring rod. The mounting plate is fixedly connected with the sliding unit, the connecting plate is fixedly connected with the sliding unit, the sliding unit is used for sliding of the mounting plate and the connecting plate, transverse supports are arranged at the left end and the right end of the connecting plate, and the transverse supports are used for supporting adsorbates. One end of the flange unit is arranged on the bottom plate, and the other end of the flange unit extends out of the bottom plate in a suspended mode. Single and double cartons can be loaded and unloaded at the same time according to the length of the cartons, working efficiency is effectively improved, and energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to a carton loading and unloading tool, in particular to a terminal tool used for loading and unloading cartons in a carriage, and belongs to the technical field of logistics loading and unloading. Background Art

[0002] At present, in the process of loading and unloading cartons in carriages, most of the operations are manual, which has high labor intensity, poor working environment, low work efficiency and high safety risks. The few existing cartons loading and unloading equipment are still immature. When grabbing cartons from the side, the cartons are easy to tilt and fall off, or be torn. There are shortcomings such as unstable grabbing, high energy consumption, poor adaptability and low work efficiency. In view of the above existing shortcomings, the utility model proposes an end tool for loading and unloading cartons in carriages, which can improve the automation level of cartons loading and unloading, maintain the balance of cartons during the grabbing process, greatly improve work efficiency, significantly improve its environmental adaptability, and effectively reduce manual labor intensity and the risks and hidden dangers of manual operations. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the prior art, the utility model provides an end tool for loading and unloading cartons in a carriage.

[0005] (2) Technical solution

[0006] In order to solve the above problems, the utility model provides the following technical solutions: an end tool for loading and unloading cartons in a carriage, the end tool for loading and unloading cartons in a carriage includes an adsorption unit, a vacuum generating unit, a sliding unit, a connecting plate, a cross brace, a spring rod, and a mounting plate. The adsorption unit is connected to the air outlet of the spring rod, the spring rod is arranged on the mounting plate and is connected to the vacuum generating unit, the air outlet of the vacuum generating unit is connected to the air inlet of the spring rod, the mounting plate is fixedly connected to the sliding unit, the connecting plate is fixedly connected to the sliding unit, the sliding unit is used for sliding of the mounting plate and the connecting plate, cross braces are provided at the left and right ends of the connecting plate, and the cross braces are used to support the adsorbed object.

[0007] Preferably, it also includes a motor, a telescopic unit, a flange unit, and a base plate. One end of the telescopic unit is arranged on the base plate, and the other end is arranged on the mounting plate through a ball joint. The motor is arranged at a position close to the telescopic unit. One end of the flange unit is arranged on the base plate, located between the motor and the telescopic unit, and the other end is suspended out of the base plate.

[0008] Preferably, it also includes a first synchronous wheel, a second synchronous wheel, a synchronous belt, a synchronous plate, a pressure plate, and a shaft. The first synchronous wheel is fixed on the motor shaft, the second synchronous wheel is hinged to one end of the shaft, and the other end of the shaft is fixed to the base plate. The first synchronous wheel and the second synchronous wheel are connected by a synchronous belt. A pressure plate is provided on one side of the synchronous belt and a synchronous plate is provided on the other side. The pressure plate and the synchronous plate are fixedly connected, and the other end of the synchronous plate is fixedly connected to the connecting plate.

[0009] Preferably, it further comprises a fifth hole and a sixth hole, and the fifth hole and the sixth hole are arranged on the mounting plate.

[0010] Preferably, the sliding unit includes a first guide rail, a second guide rail, a third guide rail, a fourth guide rail, a first slider, a second slider, a third slider, and a fourth slider, the first guide rail and the second guide rail are respectively fixedly connected to the left and right sides of the upper surface of the bottom plate, the first slider and the second slider are respectively slidably connected to the first guide rail and the second guide rail, the mounting plate spans above the first slider and the second slider, and is fixedly connected to the first slider and the second slider, the third guide rail and the fourth guide rail are respectively fixedly chained and connected to the left and right sides of the lower surface of the bottom plate, and are located between the first guide rail and the second guide rail, the third slider and the fourth slider are respectively slidably connected between the third guide rail and the fourth guide rail, the connecting plate spans above the third slider and the fourth slider, and is fixedly connected to the third slider and the fourth slider, a plurality of cross braces are respectively fixed on the front surface of the connecting plate, and a certain spacing is maintained between the cross braces.

[0011] Preferably, the adsorption unit includes a first suction cup, a second suction cup, a third suction cup, a fourth suction cup, a fifth suction cup, and a sixth suction cup, the fourth suction cup, the fifth suction cup, and the sixth suction cup are located on one side of the mounting plate, the first suction cup, the second suction cup, and the third suction cup are located on the other side of the mounting plate, the first suction cup, the second suction cup, the fourth suction cup, and the fifth suction cup are located in a row, the third suction cup and the sixth suction cup are located in a row, the adsorption areas of the first suction cup, the second suction cup, the fourth suction cup, and the fifth suction cup are the same, the adsorption areas of the third suction cup and the sixth suction cup are the same, the adsorption areas of the first suction cup, the second suction cup, the fourth suction cup, and the fifth suction cup are greater than the adsorption areas of the third suction cup and the sixth suction cup, and the number of the spring rods is the same as the number of the suction cups.

[0012] Preferably, the vacuum generating unit includes a first vacuum generating unit and a second vacuum generating unit. The first vacuum generating unit is located below the fifth suction cup and is fixedly connected to the mounting plate. The second vacuum generating unit is located below the first suction cup and is fixedly connected to the mounting plate.

[0013] Preferably, the mounting plate is provided with a first hole, a second hole, a third hole, and a fourth hole for connecting a plurality of end tools, thereby increasing the effective adsorption length.

[0014] Preferably, a terminal tool for loading and unloading cartons in a carriage, the first vacuum generating unit is connected to the first suction cup, the second suction cup, and the third suction cup through a spring rod, the second vacuum generating unit is connected to the fourth suction cup, the fifth suction cup, and the sixth suction cup through a spring rod, the air inlets of the spring rods to which the first suction cup, the second suction cup, and the third suction cup are respectively connected are fixedly connected to the air pipe, pass through the fifth hole, and are connected to the air outlet of the first vacuum generating unit, the air inlets of the spring rods to which the fourth suction cup, the fifth suction cup, and the sixth suction cup are respectively fixedly connected to the air pipe, pass through the sixth hole, and are connected to the air outlet of the second vacuum generating unit, the air inlet of the first vacuum generating unit is connected to the air pipe, passes through the fifth hole, the air inlet of the second vacuum generating unit is connected to the air pipe, passes through the sixth hole, and is connected in parallel with the air pipe passing through the fifth hole to form an air pipe, which is connected to the air source.

[0015] Working principle:

[0016] The flange unit is connected to the flange at the end of the robot arm to perform carton loading and unloading operations:

[0017] The telescopic unit is in a retracted state. At this time, the working surface of the adsorption unit protrudes a short distance from the front end of the bottom plate, and the connecting plate is in the extreme position close to the flange unit side. When the end tool gradually approaches the carton, the adsorption unit first contacts the carton. Under the action of the air source and the first vacuum generating unit and the second vacuum generating unit, the carton is firmly adsorbed. After the carton is adsorbed, the end tool gradually moves backward under the action of the robotic arm. At this time, the telescopic unit remains stationary, and the positive rotation of the motor drives the first synchronous wheel to rotate, and the synchronous plate moves toward the carton through the action of the synchronous belt. The connecting plate drives the cross brace forward under the action of the synchronous plate, the third slider, and the fourth slider. When the synchronous plate contacts the front end of the slot, it stops moving. At this time, the cross brace is fully extended to support the carton. The adsorption area of ​​the first suction cup, the second suction cup, the fourth suction cup, and the fifth suction cup is larger than that of the third suction cup and the sixth suction cup. Under the same air source pressure, the adsorption force on the upper side of the carton is greater The lower adsorption force, combined with the support of the cross brace, can effectively maintain the horizontal state of the carton and prevent the carton from falling off. Under the action of the robotic arm, the end tool that adsorbs the carton is moved to the top of the pallet or the designated position, and the telescopic end of the telescopic unit extends, and the mounting plate is driven forward by the action of the first slider and the second slider. Under the rotation of the motor, the cross brace is driven backward to the rear end of the slot through the third slider, the fourth slider and the connecting plate. At this time, all the cross braces are retracted into the bottom plate, and all the suction cups of the first suction cup partition and the second suction cup partition destroy the vacuum state in the suction cup under the action of the first vacuum generating unit and the second vacuum generating unit, so that the carton automatically detaches from the suction cup and falls to the designated position. When the length of the carton is too long, multiple end tools can be connected through the first hole and the second hole, the third hole and the fourth hole respectively, so as to increase the effective adsorption length. When the length of the carton is small, only the first adsorption unit can be used for loading and unloading operations of the carton.

[0018] (3) Beneficial effects

[0019] Compared with the prior art, the present invention provides a core engine self-cooling device for a magnetic levitation compressor, which has the following beneficial effects:

[0020] 1. The utility model is provided with an adsorption unit, which can realize the simultaneous loading and unloading of single and double cartons according to the length of the cartons, effectively improving work efficiency and reducing energy loss.

[0021] 2. The utility model can install multiple end tools on the left and right sides through the first hole and the second hole, the third hole and the fourth hole, which effectively improves its adaptability and greatly improves the loading and unloading efficiency.

[0022] 3. The adsorption areas of the first suction cup, the second suction cup, the fourth suction cup and the fifth suction cup in the two suction cup partitions described in the utility model are the same, the adsorption areas of the third suction cup and the sixth suction cup are the same, and the adsorption areas of the first suction cup, the second suction cup, the fourth suction cup and the fifth suction cup are larger than the adsorption areas of the third suction cup and the sixth suction cup; under the same air source pressure, the adsorption force on the upper side of the carton is greater than the adsorption force on the lower side, and with the support of the cross brace, the horizontal state of the carton can be effectively maintained to prevent the carton from falling off.

[0023] 4. The motor and telescopic unit of the utility model can work simultaneously, thereby driving the connecting plate and the mounting plate to move simultaneously, which can reduce the effective working space and improve work efficiency.

[0024] 5. The utility model effectively solves the problems of carton falling off, carton damage, low work efficiency, poor adaptability, etc. caused by grabbing the side of the carton in the carriage, effectively improves the intelligence level of carton loading and unloading, greatly improves work efficiency, and significantly improves its adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is one of the structural diagrams of the present utility model;

[0026] Figure 2 It is a top view of the utility model;

[0027] Figure 3 This is the second structural diagram of the present utility model;

[0028] Figure 4 This is a working state diagram of the adsorption unit of the utility model;

[0029] Figure 5 This is a working principle diagram of the utility model;

[0030] Figure 6 This is the third structural diagram of the present utility model.

[0031] In the figure: 1 adsorption unit, 101 first suction cup, 102 second suction cup, 103 third suction cup, 104 fourth suction cup, 105 fifth suction cup, 106 sixth suction cup, 2 vacuum generating unit, 201 first vacuum generating unit, 202 second vacuum generating unit, 3 sliding unit, 301 first guide rail, 302 second guide rail, 303 third guide rail, 304 fourth guide rail, 305 first slider, 306 second slider, 307 third slider, 308 fourth slider, 4 connecting plate, 5 cross brace, 6 spring rod, 7 mounting plate, 8 motor, 9 telescopic unit, 10 flange unit, 11 first synchronous wheel, 12 second synchronous wheel, 13 synchronous belt, 14 synchronous plate, 15 pressure plate, 16 fifth hole, 17 sixth hole, 18 first hole, 19 second hole, 20 third hole, 21 fourth hole, 22 shaft, 23 bottom plate. DETAILED DESCRIPTION

[0032] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0033] The utility model provides a new technical solution:

[0034] A terminal tool for loading and unloading cartons in a carriage, the terminal tool for loading and unloading cartons in a carriage comprising an adsorption unit 1, a vacuum generating unit 2, a sliding unit 3, a connecting plate 4, a cross brace 5, a spring rod 6, and a mounting plate 7. The adsorption unit 1 is connected to the air outlet of the spring rod 6, the spring rod 6 is arranged on the mounting plate 7 and is connected to the vacuum generating unit 2, the air outlet of the vacuum generating unit 2 is connected to the air inlet of the spring rod 6, the mounting plate 7 is fixedly connected to the sliding unit 3, the connecting plate 4 is fixedly connected to the sliding unit 3, the sliding unit 3 is used for sliding of the mounting plate 7 and the connecting plate 4, cross braces 5 are provided at the left and right ends of the connecting plate 4, and the cross braces 5 are used to support the adsorbed object.

[0035] In this embodiment, the end tool for loading and unloading cartons in a carriage further includes a motor 8, a telescopic unit 9, a flange unit 10, and a base plate 23. One end of the telescopic unit 9 is arranged on the base plate 23, and the other end is arranged on the mounting plate 7 through a ball joint. The motor 8 is arranged at a position close to the telescopic unit 9. One end of the flange unit 10 is arranged on the base plate 23, located between the motor 8 and the telescopic unit 9, and the other end is suspended out of the base plate 23.

[0036] In this embodiment, the end tool for loading and unloading cartons in the carriage also includes a first synchronous wheel 11, a second synchronous wheel 12, a synchronous belt 13, a synchronous plate 14, a pressure plate 15, and a shaft 22. The first synchronous wheel 11 is fixed on the shaft of the motor 8, the second synchronous wheel 12 is hinged to one end of the shaft 22, and the other end of the shaft 22 is fixed to the bottom plate 23. The first synchronous wheel 11 and the second synchronous wheel 12 are connected by a synchronous belt 13. A pressure plate 15 is provided on one side of the synchronous belt 13, and a synchronous plate 14 is provided on the other side. The pressure plate 15 and the synchronous plate 14 are fixedly connected, and the other end of the synchronous plate 14 is fixedly connected to the connecting plate 4.

[0037] In this embodiment, the end tool for loading and unloading cartons in a vehicle compartment further includes a fifth hole 16 and a sixth hole 17 , and the fifth hole 16 and the sixth hole 17 are provided on the mounting plate 7 .

[0038] In this embodiment, the sliding unit 3 includes a first guide rail 301, a second guide rail 302, a third guide rail 303, a fourth guide rail 304, a first slider 305, a second slider 306, a third slider 307, and a fourth slider 308. The first guide rail 301 and the second guide rail 302 are fixedly connected to the left and right sides of the upper surface of the bottom plate 23, respectively. The first slider 305 and the second slider 306 are slidably connected to the first guide rail 301 and the second guide rail 302, respectively. The mounting plate 7 spans over the first slider 305 and the second slider 306 and is connected to the first slider 305, the second slider 306, and the mounting plate 7 is fixed to the left and right sides of the upper surface of the bottom plate 23, respectively. The two sliders 306 are fixedly connected, the third guide rail 303 and the fourth guide rail 304 are respectively fixedly connected to the left and right sides of the lower surface of the bottom plate 23, and are located between the first guide rail 301 and the second guide rail 302. The third slider 307 and the fourth slider 308 are respectively slidably connected between the third guide rail 303 and the fourth guide rail 304. The connecting plate 4 spans over the third slider 307 and the fourth slider 308 and is fixedly connected to the third slider 307 and the fourth slider 308. A plurality of cross braces 5 are fixed to the front surface of the connecting plate 4, and a certain distance is maintained between the cross braces 5.

[0039] In this embodiment, the adsorption unit 1 includes a first suction cup 101, a second suction cup 102, a third suction cup 103, a fourth suction cup 104, a fifth suction cup 105, and a sixth suction cup 106. The fourth suction cup 104, the fifth suction cup 105, and the sixth suction cup 106 are located on one side of the mounting plate 7, and the first suction cup 101, the second suction cup 102, and the third suction cup 103 are located on the other side of the mounting plate 7. The third suction cup 103 and the sixth suction cup 106 are located in a row, the first suction cup 101, the second suction cup 102, the fourth suction cup 104 and the fifth suction cup 105 have the same suction area, the third suction cup 103 and the sixth suction cup 106 have the same suction area, the first suction cup 101, the second suction cup 102, the fourth suction cup 104 and the fifth suction cup 105 have greater suction areas than the third suction cup 103 and the sixth suction cup 106, and the number of the spring rods 6 is the same as the number of the suction cups.

[0040] In this embodiment, the vacuum generating unit 2 includes a first vacuum generating unit 201 and a second vacuum generating unit 202. The first vacuum generating unit 2 is located below the fifth suction cup 105 and is fixedly connected to the mounting plate 7. The second vacuum generating unit 2 is located below the first suction cup 101 and is fixedly connected to the mounting plate 7.

[0041] In this embodiment, the mounting plate 7 is provided with a first hole 18 , a second hole 19 , a third hole 20 , and a fourth hole 21 for connecting a plurality of end tools, thereby increasing the effective adsorption length.

[0042] In this embodiment, the first vacuum generating unit 201 is connected to the first suction cup 101, the second suction cup 102, and the third suction cup 103 through the spring rod 6, and the second vacuum generating unit 202 is connected to the fourth suction cup 104, the fifth suction cup 105, and the sixth suction cup 106 through the spring rod 6. The air inlets of the spring rod 6 connected to the first suction cup 101, the second suction cup 102, and the third suction cup 103 are respectively fixedly connected to the air pipe, pass through the fifth hole 16, and are connected to the air outlet of the first vacuum generating unit 201. The air inlets of the spring rod 6 connected to the fourth suction cup 104, the fifth suction cup 105, and the sixth suction cup 106 are respectively fixedly connected to the air pipe, pass through the sixth hole 17, and are connected to the air outlet of the second vacuum generating unit 202. The air inlet of the first vacuum generating unit 201 is connected to the air pipe, passes through the fifth hole 16, and the air inlet of the second vacuum generating unit 202 is connected to the air pipe, passes through the sixth hole 17, and is connected in parallel with the air pipe passing through the fifth hole 16 to form an air pipe connected to the air source.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A terminal tool for loading and unloading cartons in a carriage, characterized in that: The end tool for loading and unloading cartons in a carriage comprises an adsorption unit (1), a vacuum generating unit (2), a sliding unit (3), a connecting plate (4), a cross brace (5), a spring rod (6), and a mounting plate (7). The adsorption unit (1) is connected to the air outlet of the spring rod (6). The spring rod (6) is arranged on the mounting plate (7) and is connected to the vacuum generating unit (2). The air outlet of the vacuum generating unit (2) is connected to the air inlet of the spring rod (6). The mounting plate (7) is fixedly connected to the sliding unit (3). The connecting plate (4) is fixedly connected to the sliding unit (3). The sliding unit (3) is used for sliding of the mounting plate (7) and the connecting plate (4). Cross braces (5) are arranged at the left and right ends of the connecting plate (4). The cross braces (5) are used to support adsorbed objects.

2. The end tool for loading and unloading cartons in a carriage according to claim 1, characterized in that: The invention also includes a motor (8), a telescopic unit (9), a flange unit (10), and a base plate (23). One end of the telescopic unit (9) is arranged on the base plate (23), and the other end is connected to the mounting plate (7) through a ball joint. The motor (8) is arranged at a position close to the telescopic unit (9). One end of the flange unit (10) is arranged on the base plate (23) and is located between the motor (8) and the telescopic unit (9), and the other end is suspended and extends out of the base plate (23).

3. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: The invention also includes a first synchronous wheel (11), a second synchronous wheel (12), a synchronous belt (13), a synchronous plate (14), a pressure plate (15), and a shaft (22). The first synchronous wheel (11) is fixed on the shaft of the motor (8). The second synchronous wheel (12) is hinged to one end of the shaft (22). The other end of the shaft (22) is fixed to the bottom plate (23). The first synchronous wheel (11) and the second synchronous wheel (12) are connected through a synchronous belt (13). A pressure plate (15) is provided on one side of the synchronous belt (13) and a synchronous plate (14) is provided on the other side. The pressure plate (15) and the synchronous plate (14) are fixedly connected. The other end of the synchronous plate (14) is fixedly connected to the connecting plate (4).

4. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: It also includes a fifth hole (16) and a sixth hole (17), and the fifth hole (16) and the sixth hole (17) are arranged on the mounting plate (7).

5. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: The sliding unit (3) comprises a first guide rail (301), a second guide rail (302), a third guide rail (303), a fourth guide rail (304), a first slider (305), a second slider (306), a third slider (307), and a fourth slider (308). The first guide rail (301) and the second guide rail (302) are fixedly connected to the left and right sides of the upper surface of the bottom plate (23), respectively. The first slider (305) and the second slider (306) are slidably connected to the first guide rail (301) and the second guide rail (302), respectively. The mounting plate (7) spans above the first slider (305) and the second slider (306), and is in contact with the first slider (305) and the second slider (306). The third guide rail (303) and the fourth guide rail (304) are respectively fixedly connected to the left and right sides of the lower surface of the bottom plate (23) and are located between the first guide rail (301) and the second guide rail (302). The third slider (307) and the fourth slider (308) are respectively slidably connected to the third guide rail (303) and the fourth guide rail (304). The connecting plate (4) spans over the third slider (307) and the fourth slider (308) and is fixedly connected to the third slider (307) and the fourth slider (308). A plurality of cross braces (5) are respectively fixed on the front surface of the connecting plate (4), and a certain distance is maintained between the cross braces (5).

6. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: The adsorption unit (1) comprises a first suction cup (101), a second suction cup (102), a third suction cup (103), a fourth suction cup (104), a fifth suction cup (105), and a sixth suction cup (106); the fourth suction cup (104), the fifth suction cup (105), and the sixth suction cup (106) are located on one side of the mounting plate (7); the first suction cup (101), the second suction cup (102), and the third suction cup (103) are located on the other side of the mounting plate (7); the first suction cup (101), the second suction cup (102), the fourth suction cup (104), and the fifth suction cup (105) are located on the The third suction cup (103) and the sixth suction cup (106) are located in a row, the first suction cup (101), the second suction cup (102), the fourth suction cup (104), and the fifth suction cup (105) have the same suction area, the third suction cup (103) and the sixth suction cup (106) have the same suction area, the first suction cup (101), the second suction cup (102), the fourth suction cup (104), and the fifth suction cup (105) have a greater suction area than the third suction cup (103) and the sixth suction cup (106), and the number of the spring rods (6) is the same as the number of the suction cups.

7. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: The vacuum generating unit (2) comprises a first vacuum generating unit (201) and a second vacuum generating unit (202); the first vacuum generating unit (2) is located below the fifth suction cup (105) and is fixedly connected to the mounting plate (7); the second vacuum generating unit (2) is located below the first suction cup (101) and is fixedly connected to the mounting plate (7).

8. The end tool for loading and unloading cartons in a vehicle compartment according to claim 1, characterized in that: The mounting plate (7) is provided with a first hole (18), a second hole (19), a third hole (20), and a fourth hole (21) for connecting a plurality of end tools, thereby increasing the effective adsorption length.

9. The end tool for loading and unloading cartons in a vehicle compartment according to any one of claims 1 to 8, characterized in that: The first vacuum generating unit (201) is connected to the first suction cup (101), the second suction cup (102), and the third suction cup (103) through the spring rod (6); the second vacuum generating unit (202) is connected to the fourth suction cup (104), the fifth suction cup (105), and the sixth suction cup (106) through the spring rod (6); the air inlets of the spring rod (6) to which the first suction cup (101), the second suction cup (102), and the third suction cup (103) are respectively connected are fixedly connected to the air pipe, pass through the fifth hole (16), and are connected to the first vacuum generating unit (20 1), the air inlets of the spring rods (6) to which the fourth suction cup (104), the fifth suction cup (105), and the sixth suction cup (106) are respectively connected are fixedly connected to the air pipes, pass through the sixth hole (17), and are connected to the air outlet of the second vacuum generating unit (202); the air inlet of the first vacuum generating unit (201) is connected to the air pipe, passes through the fifth hole (16); the air inlet of the second vacuum generating unit (202) is connected to the air pipe, passes through the sixth hole (17), and is connected in parallel with the air pipe passing through the fifth hole (16) to form an air pipe, which is connected to the air source.

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