A metal sheet punching device for mechanical engineering

Abstract

The present invention discloses a metal sheet stamping device for mechanical engineering, comprising: a base plate, a support column, a fastening plate, a collection box, a transfer module, a first gear, a second gear, a third gear, a fourth gear, a turntable, a limit frame, a rotating part, a first motor, a magnet, a storage bin, and a support plate. The present invention can independently complete the loading and stamping of metal sheets through a linkage structure, and can collect the stamped parts and metal waste plates after stamping, saving unnecessary waste. The overall stamping process does not require manual participation, saving manpower, and can ensure the accuracy of each stamping. The actual stamping efficiency is high and has strong practicality. It solves the problem that the prior art that manual hand-held metal sheet stamping operations not only have safety hazards and large stamping errors, but also that the metal sheets cannot be loaded independently and need to be manually grabbed and stamped one by one, resulting in low overall efficiency and high labor consumption.

Description

Technical Field

[0001] The invention belongs to the field of mechanical engineering, and in particular relates to a metal plate punching device used in mechanical engineering. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, pipes and profiles to produce plastic deformation or separation, thereby obtaining a workpiece of the desired shape and size. Stamping and forging are both plastic processing, collectively known as forging. The blanks for stamping are mainly hot-rolled and cold-rolled steel plates and strips.

[0003] Nowadays, the stamping processing of metal sheets is generally done by manually holding the metal sheets and performing stamping operations through a stamping device. This method not only has great safety hazards, but also it is difficult to accurately locate the stamping position during the actual stamping process. Therefore, the stamping error in the actual operation is large, and the metal sheets cannot be loaded autonomously. They need to be manually grabbed and stamped one by one. The overall efficiency is low and the labor consumption is high. Therefore, it is in line with actual needs to design a stamping device that can replace manual labor to autonomously complete the loading and stamping of metal sheets, improve work efficiency, and reduce manpower and safety hazards.

[0004] In view of the above-mentioned problems, a metal sheet punching device for mechanical engineering is now designed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a metal sheet stamping device for mechanical engineering, which solves the problem that in the prior art, people have to hold metal sheets to perform stamping operations, which not only poses safety hazards and causes large stamping errors, but also that metal sheets cannot be loaded independently and need to be manually grabbed and stamped one by one, resulting in low overall efficiency and high labor consumption.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A metal plate stamping device for mechanical engineering comprises a base plate, a support column is fixedly arranged on the base plate, a fastening plate is fixedly arranged on the support column, and a rotatably connected transfer module is arranged on the base plate.

[0008] The bottom plate is provided with a first gear, a second gear, a third gear and a fourth gear which are rotatably connected. The first gear is meshed with the second gear and the fourth gear, and the third gear is meshed with the second gear. A connecting block is fixedly provided on the bottom plate, a sliding rod is fixedly provided between the connecting blocks, a first rack which is slidably connected is provided on the sliding rod, a first sliding groove is fixedly provided at one end of the first rack, a rotating rod is fixedly provided on the fourth gear, a first transmission block is fixedly provided on the rotating rod, and the first transmission block is slidably connected to the first sliding groove.

[0009] A connecting column is fixedly provided on the bottom plate, a supporting plate is fixedly provided on the connecting column, a first rotating arm is provided on the supporting plate for rotation connection, a first rotating shaft is fixedly provided on the third gear, the first rotating shaft is connected to the supporting plate and is fixedly connected to the first rotating arm, a storage bin is provided above the supporting plate, a first connecting rod is fixedly provided on the side end of the storage bin, the first connecting rod is fixedly connected to the fastening plate, a limiting plate is fixedly provided on the supporting plate, one end of the limiting plate is fixedly connected to the storage bin, a through groove is provided on the supporting plate, and the through groove is placed between the limiting plates.

[0010] Furthermore, a second rotating shaft is fixedly provided on the first gear, a turntable is fixedly provided on the second rotating shaft, a punching groove is provided on the turntable, a limiting frame is fixedly provided on the turntable, and the punching groove is placed in the limiting frame.

[0011] A guide rod is fixedly provided at the lower end of the turntable, and a slidably connected storage box is provided at the lower end of the turntable. The guide rod passes through the storage box and is slidably connected to the storage box. A third rotating shaft is fixedly provided on the turntable, and the second rotating shaft is connected to the turntable and fixedly connected to the third rotating shaft. A rotating part is fixedly provided on the third rotating shaft, and a groove and an arc groove are provided on the rotating part.

[0012] Furthermore, a second connecting rod and a third connecting rod are fixedly provided at the lower end of the fastening plate, a first motor is fixedly provided at the side end of the third connecting rod, a third rotating shaft and a fourth rotating shaft which are rotatably connected are provided on the third connecting rod, a first bevel gear and a second rotating arm are fixedly provided on the fourth rotating shaft, and an output end of the first motor is connected to the third connecting rod and is fixedly connected to the fourth rotating shaft.

[0013] A second bevel gear is fixedly provided on the third rotating shaft, and the second bevel gear is meshed with the first bevel gear. An arc block is fixedly provided at the lower end of the third rotating shaft, a shift plate is fixedly provided at the lower end of the arc block, a second transmission block is fixedly provided on the shift plate, and the arc block cooperates with the arc groove on the rotating member.

[0014] Furthermore, a magnet is fixedly provided on one side of the second connecting rod, a mounting rod is fixedly provided on the side end of the second connecting rod, a guide groove is fixedly provided on one end of the mounting rod, a slidingly connected impact rod is provided in the guide groove, a tooth groove is provided on the side end of the impact rod, a rotatably connected third rotating arm is provided on one side of the second connecting rod, one end of the third rotating arm is a gear structure, which meshes with the tooth groove on the impact rod, a pressure rod is fixedly provided on the side end of the impact rod, a stamping part is fixedly provided on the lower end of the pressure rod, and the stamping part is placed directly above the stamping groove.

[0015] Furthermore, a fifth rotating shaft connected in rotation is provided on the other side of the second connecting rod, a fifth gear is fixedly provided at one end of the fifth rotating shaft, a fastening block is fixedly provided at one end of the second connecting rod, a limiting groove is fixedly provided at one end of the fastening block, a sliding rod slidably connected is provided in the limiting groove, the sliding rod is fixedly connected to the second rack, a second sliding groove is fixedly provided on one side of the second rack, a second transmission block is fixedly provided at one end of the second rotating arm, the second transmission block is placed in the second sliding groove and slidably cooperates with the second sliding groove, and the fifth gear is meshed with the second rack.

[0016] Furthermore, a collection box is placed on the upper end of the base plate, and the collection box is placed on one side of the transfer module. The transfer module includes a sixth gear, and the sixth gear is rotatably connected to the upper end of the base plate, and the sixth gear is meshed with the first rack.

[0017] A mounting frame is fixedly provided on the upper end of the sixth gear, a fixedly connected guide rod and a rotatably connected lead screw are arranged inside the mounting frame, a second motor is fixedly provided on the upper end of the mounting frame, an output end of the second motor is connected to the mounting frame and fixedly connected to the lead screw.

[0018] A slidably connected lifting plate is provided in the mounting frame, the guide rod and the screw rod pass through the lifting plate, the guide rod is slidably connected to the lifting plate, the screw rod is threadedly matched with the lifting plate, an air pump is fixedly provided on the lifting plate, a suction cup is fixedly provided at the lower end of the lifting plate, the air pump is connected to the lifting plate and is connected to the suction cup.

[0019] Beneficial effects of the present invention:

[0020] 1. The metal sheet stamping device for mechanical engineering proposed by the present invention can independently complete the feeding and stamping of metal sheets through the linkage structure, and can collect the stamped parts and metal waste plates after stamping, saving unnecessary waste. The overall stamping process does not require manual participation, saving manpower, and can ensure the accuracy of each stamping. The actual stamping efficiency is high and has strong practicality;

[0021] 2. The metal sheet stamping device for mechanical engineering proposed in the present invention only needs one motor to complete the feeding and stamping operations compared to the existing stamping devices. It has a wide range of applications, convenient operation, strong linkage, low cost, and can be widely used in the stamping field. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at point A;

[0026] Figure 4 It is a partial structural schematic diagram of an embodiment of the present invention;

[0027] Figure 5 It is a partial structural schematic diagram of an embodiment of the present invention;

[0028] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at B;

[0029] Figure 7 It is a schematic diagram of the structure of a transfer module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] like Figure 1 As shown, a metal sheet stamping device for mechanical engineering includes a bottom plate 1, an array of support columns 2 are fixedly provided on the upper end of the bottom plate 1, a fastening plate 3 is fixedly provided on the upper end of the support columns 2, a collection box 4 is placed on the upper end of the bottom plate 1, and a rotatably connected transfer module 5 is provided on the upper end of the bottom plate 1. The collection box 4 is placed on one side of the transfer module 5.

[0033] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the bottom plate 1 is provided with a first gear 6, a second gear 7, a third gear 8 and a fourth gear 9 which are rotatably connected. The first gear 6 meshes with the second gear 7 and the fourth gear 9, and the third gear 8 meshes with the second gear 7. A connecting block 10 is fixedly provided on the bottom plate 1, and a sliding rod 11 is fixedly provided between the connecting blocks 10. A first rack 12 which is slidably connected is provided on the sliding rod 11, and a first slide groove 13 is fixedly provided at one end of the first rack 12. A rotating rod 14 is fixedly provided at the upper end of the fourth gear 9, and a first transmission block 15 is fixedly provided at the upper end of the rotating rod 14. The first transmission block 15 is placed in the first slide groove 13 and is slidably connected to the first slide groove 13.

[0034] A connecting column 16 is fixedly provided at the upper end of the bottom plate 1, a supporting plate 17 is fixedly provided at the upper end of the connecting column 16, a first rotating arm 39 is provided at the upper end of the supporting plate 17 for rotational connection, a first rotating shaft 19 is fixedly provided at the upper end of the third gear 8, the first rotating shaft 19 is connected to the supporting plate 17 and is fixedly connected to the first rotating arm 39. A material storage bin 21 is provided above the supporting plate 17, a first connecting rod 22 is fixedly provided at the side end of the material storage bin 21, and the first connecting rod 22 is fixedly connected to the lower end of the fastening plate 3. The spacing between the supporting plate 17 and the material storage bin 21 is the thickness of a metal plate. A limiting plate 18 is fixedly provided at the upper end of the supporting plate 17, one end of the limiting plate 18 is fixedly connected to the material storage bin 21, and a through groove 20 is provided on the supporting plate 17, and the through groove 20 is placed between the limiting plates 18.

[0035] A second rotating shaft 51 is fixedly provided at the upper end of the first gear 6, and a turntable 23 is fixedly provided at the upper end of the second rotating shaft 51. The turntable 23 is provided with punching grooves 24 distributed in an array, and a limit frame 25 is fixedly provided at the upper end of the turntable 23 in an array, and the punching grooves 24 are placed in the limit frame 25. An array of guide rods 49 are fixedly provided at the lower end of the turntable 23, and a storage box 50 connected in a sliding manner is arranged in an array at the lower end of the turntable 23. The guide rods 49 penetrate the storage box 50 and are slidably connected to the storage box 50. A third rotating shaft 35 is fixedly provided at the upper end of the turntable 23, and the second rotating shaft 51 is connected to the turntable 23 and fixedly connected to the third rotating shaft 35. A rotating member 34 is fixedly provided at the upper end of the third rotating shaft 35, and an array of grooves and arc grooves are arranged on the rotating member 34.

[0036] The lower end of the fastening plate 3 is fixed with a second connecting rod 26 and a third connecting rod 27, and the side end of the third connecting rod 27 is fixed with a first motor 29. The third connecting rod 27 is provided with a third rotating shaft 32 and a fourth rotating shaft 30 that are rotatably connected, and the fourth rotating shaft 30 is fixed with a first bevel gear 31 and a second rotating arm 28. The output end of the first motor 29 is connected to the third connecting rod 27 and is fixedly connected to the fourth rotating shaft 30. The upper end of the third rotating shaft 32 is fixed with a second bevel gear 33, and the second bevel gear 33 is meshed with the first bevel gear 31. The lower end of the third rotating shaft 32 is fixed with an arc block 36, and the lower end of the arc block 36 is fixed with a shift plate 37, and the upper end of the shift plate 37 is fixed with a second transmission block 38, and the arc block 36 is matched with the arc groove on the rotating member 34.

[0037] A magnet 40 is fixedly provided on one side of the second connecting rod 26, a mounting rod 42 is fixedly provided on the side end of the second connecting rod 26, a guide groove 43 is fixedly provided on one end of the mounting rod 42, a sliding impact rod 44 is provided in the guide groove 43, a tooth groove is provided on the side end of the impact rod 44, a third rotating arm 45 is rotatably provided on one side of the second connecting rod 26, one end of the third rotating arm 45 is a gear structure, meshing with the tooth groove on the impact rod 44. A pressing rod 46 is fixedly provided on the side end of the impact rod 44, a stamping part 47 is fixedly provided on the lower end of the pressing rod 46, and the stamping part 47 is placed just above the stamping groove 24.

[0038] A fifth rotating shaft 56 is provided at the other side of the second connecting rod 26 for rotation connection, a fifth gear 57 is fixedly provided at one end of the fifth rotating shaft 56, a fastening block 52 is fixedly provided at one end of the second connecting rod 26, a limiting groove 53 is fixedly provided at one end of the fastening block 52, a sliding rod 55 is provided in a sliding connection in the limiting groove 53, and the sliding rod 55 is fixedly connected to the second rack 54. A second sliding groove 48 is fixedly provided at one side of the second rack 54, a second transmission block 41 is fixedly provided at one end of the second rotating arm 28, the second transmission block 41 is placed in the second sliding groove 48, and slides with the second sliding groove 48. The fifth gear 57 meshes with the second rack 54.

[0039] like Figure 7As shown, the transfer module 5 includes a sixth gear 501, which is rotatably connected to the upper end of the base plate 1, and the sixth gear 501 is meshed with the first rack 12. A mounting frame 502 is fixedly provided on the upper end of the sixth gear 501, and a guide rod 504 fixedly connected and a screw rod 503 rotatably connected are provided in the mounting frame 502. A second motor 505 is fixedly provided on the upper end of the mounting frame 502, and the output end of the second motor 505 is connected to the mounting frame 502 and fixedly connected to the screw rod 503. A lifting plate 506 slidably connected is provided in the mounting frame 502, and the guide rod 504 and the screw rod 503 penetrate the lifting plate 506, and the guide rod 504 is slidably connected to the lifting plate 506, and the screw rod 503 is threadedly matched with the lifting plate 506. An air pump 507 is fixedly provided at the upper end of the lifting plate 506 , and a suction cup 508 is fixedly provided at the lower end of the lifting plate 506 . The air pump 507 is connected to the lifting plate 506 and is connected to the suction cup 508 .

[0040] When in use, the metal sheets are stacked and placed in the storage bin 21, and the metal sheets at the bottom are fitted with the support plate 17. Then the first motor 29 is started to rotate the fourth shaft 30, thereby rotating the third shaft 32 and the second rotating arm 28, so that the rotating member 34 drives the turntable 23 to rotate intermittently, and the second rotating arm 28 drives the second rack 54 to reciprocate, and the second rack 54 just completes a reciprocating motion after the turntable 23 makes an intermittent rotation. The second rack 54 reciprocates while driving the fifth gear 57 and the third rotating arm 45 to reciprocate, so the impact rod 44 placed on both sides of the third rotating arm 45 intermittently moves up and down, and when the third rotating arm 45 moves to the bottom, it is just inserted into the stamping groove 24, and when the third rotating arm 45 moves to the top, it is just adsorbed by the magnet 40. When the turntable 23 rotates intermittently, the first gear 6, the second gear 7, the third gear 8 and the fourth gear 9 rotate synchronously, and when the first gear 6 rotates intermittently, the third gear 8 and the fourth gear 9 rotate completely. Then the first rotating arm 39 moves the metal sheet at the bottom into the through slot 20, and it just falls into the limit frame 25. Then, the metal sheet is punched through the intermittent movement of the impact rod 44. The punched part falls into the storage box 50 for collection, and the remaining part moves to one side of the transfer module 5 with the next rotation of the turntable 23. Since the fourth gear 9 rotates completely, the first rack 12 also reciprocates, so that the sixth gear 501 reciprocates. Therefore, during the rotation of the sixth gear 501, the second motor 505 and the air pump 507 are controlled to transfer the remaining metal sheet to the collection box 4 for collection, and can be recycled later.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A metal sheet punching device for mechanical engineering, characterized in that: It comprises a base plate (1), a support column (2) is fixedly provided on the base plate (1), a fastening plate (3) is fixedly provided on the support column (2), and a transfer module (5) which is rotatably connected is provided on the base plate (1); The bottom plate (1) is provided with a first gear (6), a second gear (7), a third gear (8) and a fourth gear (9) which are rotatably connected. The first gear (6) is meshed with the second gear (7) and the fourth gear (9), and the third gear (8) is meshed with the second gear (7). A connecting block (10) is fixedly provided on the bottom plate (1). A sliding rod (11) is fixedly provided between the connecting blocks (10). A first rack (12) which is slidably connected is provided on the sliding rod (11). A first sliding groove (13) is fixedly provided at one end of the first rack (12). A rotating rod (14) is fixedly provided on the fourth gear (9). A first transmission block (15) is fixedly provided on the rotating rod (14). The first transmission block (15) is slidably connected with the first sliding groove (13). A connecting column (16) is fixedly provided on the bottom plate (1), a supporting plate (17) is fixedly provided on the connecting column (16), a first rotating arm (39) rotatably connected to the supporting plate (17) is fixedly provided on the supporting plate (17), a first rotating shaft (19) is fixedly provided on the third gear (8), the first rotating shaft (19) is connected to the supporting plate (17) and is fixedly connected to the first rotating arm (39), a material storage bin (21) is provided above the supporting plate (17), a first connecting rod (22) is fixedly provided at a side end of the material storage bin (21), the first connecting rod (22) is fixedly connected to the fastening plate (3), a limiting plate (18) is fixedly provided on the supporting plate (17), one end of the limiting plate (18) is fixedly connected to the material storage bin (21), a through groove (20) is provided on the supporting plate (17), and the through groove (20) is placed between the limiting plates (18); A second rotating shaft (51) is fixedly provided on the first gear (6), a turntable (23) is fixedly provided on the second rotating shaft (51), a punching groove (24) is provided on the turntable (23), a limit frame (25) is fixedly provided on the turntable (23), and the punching groove (24) is placed in the limit frame (25); A guide rod (49) is fixedly provided at the lower end of the turntable (23), a storage box (50) is slidably connected to the lower end of the turntable (23), the guide rod (49) passes through the storage box (50) and is slidably connected to the storage box (50), a third rotating shaft (35) is fixedly provided on the turntable (23), the second rotating shaft (51) is connected to the turntable (23) and is fixedly connected to the third rotating shaft (35), a rotating member (34) is fixedly provided on the third rotating shaft (35), and a groove and an arc groove are provided on the rotating member (34); A second connecting rod (26) and a third connecting rod (27) are fixedly provided at the lower end of the fastening plate (3); a first motor (29) is fixedly provided at the side end of the third connecting rod (27); a third rotating shaft (32) and a fourth rotating shaft (30) are rotatably connected to the third connecting rod (27); a first bevel gear (31) and a second rotating arm (28) are fixedly provided to the fourth rotating shaft (30); an output end of the first motor (29) is connected to the third connecting rod (27) and is fixedly connected to the fourth rotating shaft (30); A second bevel gear (33) is fixedly provided on the third rotating shaft (32), the second bevel gear (33) is meshed with the first bevel gear (31), a circular arc block (36) is fixedly provided on the lower end of the third rotating shaft (32), a shift plate (37) is fixedly provided on the lower end of the circular arc block (36), a second transmission block (38) is fixedly provided on the shift plate (37), and the circular arc block (36) is matched with the circular arc groove on the rotating member (34); A magnet (40) is fixedly provided on one side of the second connecting rod (26), a mounting rod (42) is fixedly provided on the side end of the second connecting rod (26), a guide groove (43) is fixedly provided on one end of the mounting rod (42), a slidingly connected impact rod (44) is provided in the guide groove (43), a tooth groove is provided on the side end of the impact rod (44), a rotatably connected third rotating arm (45) is provided on one side of the second connecting rod (26), one end of the third rotating arm (45) is a gear structure, meshing with the tooth groove on the impact rod (44), a pressure rod (46) is fixedly provided on the side end of the impact rod (44), a stamping part (47) is fixedly provided on the lower end of the pressure rod (46), and the stamping part (47) is placed directly above the stamping groove (24); A fifth rotating shaft (56) which is rotatably connected is provided on the other side of the second connecting rod (26), and a fifth gear (57) is fixedly provided on one end of the fifth rotating shaft (56). A fastening block (52) is fixedly provided on one end of the second connecting rod (26), and a limiting groove (53) is fixedly provided on one end of the fastening block (52). A sliding rod (55) which is slidably connected is provided in the limiting groove (53), and the sliding rod (55) is fixedly connected to the second rack (54). A second sliding groove (48) is fixedly provided on one side of the second rack (54). A second transmission block (41) is fixedly provided on one end of the second rotating arm (28), and the second transmission block (41) is placed in the second sliding groove (48) and slidably cooperates with the second sliding groove (48), and the fifth gear (57) is meshed with the second rack (54).

2. A metal sheet punching device for mechanical engineering according to claim 1, characterized in that: A collection box (4) is placed on the upper end of the base plate (1), and the collection box (4) is placed on one side of the transfer module (5). The transfer module (5) comprises a sixth gear (501), and the sixth gear (501) is rotatably connected to the upper end of the base plate (1), and the sixth gear (501) is meshed with the first rack (12); A mounting frame (502) is fixedly provided at the upper end of the sixth gear (501), a guide rod (504) fixedly connected and a screw rod (503) rotatably connected are provided inside the mounting frame (502), a second motor (505) is fixedly provided at the upper end of the mounting frame (502), an output end of the second motor (505) is connected to the mounting frame (502) and is fixedly connected to the screw rod (503); A lifting plate (506) is provided in the mounting frame (502) in a sliding connection. The guide rod (504) and the screw rod (503) penetrate the lifting plate (506). The guide rod (504) is slidably connected to the lifting plate (506). The screw rod (503) is threadedly matched with the lifting plate (506). An air pump (507) is fixedly provided on the lifting plate (506). A suction cup (508) is fixedly provided at the lower end of the lifting plate (506). The air pump (507) is connected to the lifting plate (506) and is connected to the suction cup (508).

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