Part lifting mechanism for large board assembly line

By designing a part lifting mechanism including conveying components, flip-board components, etc., the rapid flip and height adjustment of the large plate are achieved, the inconvenience problems in the prior art are solved, and the production efficiency is improved.

CN222588651UActive Publication Date: 2025-03-11MICROFITS (BEIJING) TECH CO LTD
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Patent Information

Application Number
CN202420684932.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-03
Publication Date
2025-03-11
Estimated Expiration
2034-04-03

AI Technical Summary

Technical Problem

The existing parts lifting mechanism is not convenient to quickly and stably flip the large plate, and it is not convenient to quickly flip the large plate and move to the appropriate height for the next step.

Method used

A part lifting mechanism including a conveying assembly, a flap assembly, a brake assembly, a lifting assembly, a clamping assembly and a thrust assembly is designed. Through the collaborative work of these components, the large plate can be quickly flipped and height adjustment, which facilitates the subsequent process.

Benefits of technology

The rapid and stable flip and height adjustment of the large plate is achieved, and the problem of inconvenience in the part lifting mechanism of the part in the prior art is solved, and the production efficiency is improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of part lifting mechanisms, in particular to a part lifting mechanism for a large board assembly line. The technical problems that in the prior art, a part lifting mechanism is inconvenient to turn over a large plate rapidly and stably, and the large plate is inconvenient to move to a proper height to be subjected to the next procedure after being turned over rapidly are solved. According to the technical scheme, the part lifting mechanism for the large board assembly line comprises a conveying assembly; the device further comprises a turning plate assembly, a braking assembly, a lifting assembly, a clamping assembly and a pushing assembly. According to the utility model, the conveying assembly is started to move the large plate to the plate turning assembly, then the braking assembly is started to enable the plate turning assembly to turn over the large plate, the large plate can be manually assisted to turn over during turning over, so that the large plate can be quickly turned over, and the conveying assembly is started again to move the large plate to the lifting assembly; the clamping assembly is started to clamp the large plate, the pushing assembly is started to push the large plate out of the clamping assembly, and the technical problem is solved.
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Description

Technical Field

[0001] The utility model belongs to the field of parts lifting mechanisms, in particular to a parts lifting mechanism used for a large panel assembly line. Background Art

[0002] In the production process of the large panel assembly line, the parts lifting mechanism plays a vital role. The function of the parts lifting mechanism is to move the parts from one position to another to ensure the smooth operation and efficient production of the production line. In the production process, due to the large size of the large panel, it is sometimes necessary to turn the large panel over and then lift it to a certain height for assembly. However, the parts lifting mechanism in the prior art is not convenient for quickly and stably turning over the large panel, and it is not convenient to quickly turn over the large panel and move it to a suitable height for the next step, which needs further improvement. Utility Model Content

[0003] In order to overcome the problem that the parts lifting mechanism in the prior art is not convenient for turning over the large plate quickly and stably, and is not convenient for turning over the large plate quickly and moving it to a suitable height for the next step of the process.

[0004] The technical solution of the utility model is: a parts lifting mechanism for a large panel assembly line, including a conveying component; also including a flap component, a brake component, a lifting component, a clamping component and a pushing component; a flap component for flipping is arranged on the upper end of the conveying component; a brake component for braking is arranged on the conveying component; a lifting component for lifting is arranged on the upper end of the conveying component; a clamping component for clamping the large panel is arranged on the lifting component; and a pushing component for pushing the large panel is arranged on the clamping component.

[0005] Preferably, when in use, the large plate is placed on the conveying assembly, the conveying assembly is turned on to convey the large plate to the lifting assembly, and then the lifting assembly is turned on to adjust the height of the clamping assembly, the clamping assembly is turned on to clamp the large plate, and the pushing assembly is turned on to push the large plate out of the clamping assembly, and then the next process is connected. When the large plate needs to be turned over, the conveying assembly is first turned on to move the large plate to the flip plate assembly, and then the braking assembly is turned on to make the flip plate assembly flip the large plate. The flipping of the large plate can be manually assisted during flipping, so that the large plate can be quickly flipped, and the conveying assembly can be turned on again to move the large plate to the lifting assembly, which solves the problem that the parts lifting mechanism in the prior art is not convenient for quickly and stably flipping the large plate, and is not convenient for moving the large plate to a suitable height after rapid flipping for the next process.

[0006] Preferably, the conveying assembly includes a base plate, a support frame, a fixed plate, a belt conveyor, rubber bumps and a limit baffle; the upper end of the base plate is fixedly connected to the support frame; the upper end of the support frame is fixedly connected to a symmetrical fixed plate; the upper end of the support frame is provided with a belt conveyor; the conveyor belt of the belt conveyor is fixedly connected to evenly distributed rubber bumps; the upper end of the base plate is fixedly connected to a symmetrical limit baffle; the thickness of the limit baffle is three centimeters. When large plates need to be conveyed, the large plates are placed on the upper ends of multiple limit baffles. Due to the buffering capacity of the rubber bumps, the bumps on the large plates when placed can be reduced.

[0007] Preferably, the flip plate assembly includes a first electric cylinder, a lifting block, a rotating column, a connecting block, a flipping block and a first gear ring; the limit baffle is in a "U" shape; the first electric cylinder is fixedly connected to the inner walls at the front and rear ends of the limit baffle; the lower end of the telescopic rod of the first electric cylinder is fixedly connected to the lifting block; the left and right ends of the lifting block are rotatably installed with rotating columns; the ends of the two rotating columns close to each other are fixedly connected to the connecting block; the front end of the connecting block is fixedly connected to the flipping block; the lower end of the connecting block is in contact with the upper end of the conveyor belt of the belt conveyor; the first gear ring is fixedly connected to the outer wall at the right end of the rotating column, and when it is necessary to flip the large plate, the braking assembly is turned on to rotate the first gear ring, the first gear ring drives the rotating column to rotate, the rotating column drives the connecting block to rotate, and the connecting block drives the two flipping blocks to rotate to flip the large plate.

[0008] Preferably, the brake assembly includes a first bearing block, a second electric cylinder, a fixed cylinder, a first motor and a gear; the right end of the limit baffle is fixedly connected to the first bearing block; the upper end of the first bearing block is fixedly connected to the second electric cylinder; the upper end of the telescopic rod of the second electric cylinder is fixedly connected to the fixed cylinder; the inner wall of the fixed cylinder is fixedly connected to the first motor; the left end of the output shaft of the first motor is fixedly connected to the gear; the gear and the first gear ring are meshed, and when the flap assembly needs to be rotated, the first motor is turned on to rotate the gear, and the gear drives the first gear ring to rotate, which can drive the flap assembly to rotate. When the height of the gear needs to be adjusted, the second electric cylinder is turned on to make the fixed cylinder rise and fall in the vertical direction, so that the height of the gear can be quickly adjusted.

[0009] Preferably, the lifting assembly includes a frame, a second bearing block and a third electric cylinder; the upper end of the base plate is fixedly connected to the frame; the upper end of the frame is fixedly connected to the second bearing block; the upper end of the second bearing block is fixedly connected to the third electric cylinder; the lower end of the telescopic rod of the third electric cylinder passes through the upper end of the second bearing block and extends to the bottom of the second bearing block. When the clamping assembly needs to be lifted or lowered, the third electric cylinder is opened so that the telescopic rod of the third electric cylinder extends downward, and the clamping assembly can be lifted or lowered.

[0010] Preferably, the clamping assembly includes a lifting plate, a first slot body, a fourth electric cylinder, a clamping block, a limiting hole, a third bearing block and a limiting column; the lower end of the telescopic rod of the third electric cylinder passes through the second bearing block and is fixedly connected to the lifting plate; the left and right ends of the lifting plate pass through a symmetrical first slot body; the inner wall of the first slot body is fixedly connected to an oppositely arranged fourth electric cylinder; the telescopic rod of the fourth electric cylinder is fixedly connected to a clamping block; the left and right ends of the clamping block pass through a limiting hole; the upper end of the lifting plate is fixedly connected to a symmetrical third bearing block; the left and right ends of the third bearing block are fixedly connected to the limiting column; the outer wall of the limiting column is in contact with the inner wall of the limiting hole, and when it is necessary to clamp the large plate, the two fourth electric cylinders with opposite output directions are turned on to make the two clamping blocks move away from or close to each other, so that the large plate can be clamped.

[0011] Preferably, the pushing assembly includes a fixed seat, a bearing seat, a second motor, a screw, a threaded sleeve and a push plate; the lower end of the lifting plate is fixedly connected to the fixed seat; the lifting plate is fixedly connected to the bearing seat; the front end of the fixed seat is fixedly connected to the second motor; the rear end of the output shaft of the second motor passes through the fixed seat and is fixedly connected to the screw; the rear end outer wall of the screw is in contact with the inner wall of the bearing seat; the outer wall of the screw is movably mounted with a threaded sleeve; the lower end of the threaded sleeve is fixedly connected to the push plate, and when it is necessary to move the large plate clamped on the clamping assembly out, the second motor is turned on to rotate the screw, the threaded sleeve will move along the outer wall of the screw, thereby driving the push plate to move, and the push plate will move the large plate on the clamping assembly out.

[0012] Beneficial effects of the utility model:

[0013] 1. When the flip plate assembly needs to be rotated, the first motor is turned on to rotate the gear, the gear drives the first gear ring to rotate, the first gear ring drives the rotating column to rotate, the rotating column drives the connecting block to rotate, and the connecting block drives the two flipping blocks to rotate to flip the large plate, which solves the problem that the parts lifting mechanism in the prior art is not convenient for quickly and stably flipping the large plate, and is not convenient for quickly flipping the large plate and moving it to a suitable height for the next step;

[0014] 2. By turning on the third electric cylinder to extend the telescopic rod of the third electric cylinder downward, the clamping assembly is lifted and lowered, and the two fourth electric cylinders with opposite output directions are turned on to make the two clamping blocks move away from or close to each other, so that the large plate can be clamped. When the large plate clamped on the clamping assembly needs to be moved out, the second motor is turned on to rotate the screw rod, and the screw sleeve will move along the outer wall of the screw rod, thereby driving the push plate to move, and the push plate will move the large plate on the clamping assembly out, which is convenient for use in the next process, solving the problem that the parts lifting mechanism in the prior art is not convenient for quickly turning over the large plate and moving it to a suitable height for the next process;

[0015] 3. When the height of the gear needs to be adjusted, turn on the second electric cylinder to make the fixed cylinder rise and fall in the vertical direction, so that the height of the gear can be quickly adjusted. Turn on the first electric cylinder to make the lifting block rise and fall, so that the height of the flipping block can be adjusted, thereby facilitating the flipping of the large plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a parts lifting mechanism for a large panel assembly line of the utility model;

[0017] Figure 2 The present invention shows a three-dimensional structural schematic diagram of a conveying component and a lifting component of a parts lifting mechanism for a large panel assembly line;

[0018] Figure 3 What is shown is a three-dimensional structural schematic diagram of a flap assembly of a parts lifting mechanism for a large panel assembly line according to the utility model;

[0019] Figure 4 The three-dimensional structure diagram of a brake assembly of a part lifting mechanism for a large panel assembly line according to the utility model is shown;

[0020] Figure 5 What is shown is a three-dimensional structural schematic diagram of a clamping assembly of a parts lifting mechanism for a large panel assembly line according to the utility model;

[0021] Figure 6 What is shown is a three-dimensional structural schematic diagram of a push assembly of a part lifting mechanism used in a large panel assembly line according to the utility model.

[0022] The marks in the attached drawings are: 1-conveying assembly, 101-bottom plate, 102-support frame, 103-fixed plate, 104-belt conveyor, 105-rubber bump, 106-limit baffle, 2-flip assembly, 201-first electric cylinder, 202-lifting block, 203-rotating column, 204-connecting block, 205-flipping block, 206-first gear ring, 3-brake assembly, 301-first bearing block, 302-second electric cylinder, 303-fixed cylinder, 304-first Motor, 305-gear, 4-lifting assembly, 401-frame, 402-second bearing block, 403-third electric cylinder, 5-clamping assembly, 501-lifting plate, 502-first trough, 503-fourth electric cylinder, 504-clamping block, 505-limiting hole, 506-third bearing block, 507-limiting column, 6-pushing assembly, 601-fixed seat, 602-bearing seat, 603-second motor, 604-screw, 605-thread sleeve, 606-push plate. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1 The utility model provides an embodiment: a parts lifting mechanism for a large panel assembly line, comprising a conveying component 1; further comprising a flap component 2, a brake component 3, a lifting component 4, a clamping component 5 and a pushing component 6; a flap component 2 for flipping is arranged at the upper end of the conveying component 1; a brake component 3 for braking is arranged on the conveying component 1; a lifting component 4 for lifting is arranged at the upper end of the conveying component 1; a clamping component 5 for clamping the large panel is arranged on the lifting component 4; a pushing component 6 for pushing the large panel is arranged on the clamping component 5.

[0025] See also Figure 2 In this embodiment, the conveying assembly 1 includes a bottom plate 101, a support frame 102, a fixing plate 103, a belt conveyor 104, a rubber bump 105 and a limit baffle 106; the upper end of the bottom plate 101 is fixedly connected to the support frame 102; the upper end of the support frame 102 is fixedly connected to a symmetrical fixing plate 103; the upper end of the support frame 102 is provided with a belt conveyor 104; the conveyor belt of the belt conveyor 104 is fixedly connected to rubber bumps 105 evenly distributed; the upper end of the bottom plate 101 is fixedly connected to the There are symmetrical limit baffles 106; the thickness of the limit baffle 106 is three centimeters; the lifting component 4 includes a frame 401, a second bearing block 402 and a third electric cylinder 403; the upper end of the base plate 101 is fixedly connected to the frame 401; the upper end of the frame 401 is fixedly connected to the second bearing block 402; the upper end of the second bearing block 402 is fixedly connected to the third electric cylinder 403; the lower end of the telescopic rod of the third electric cylinder 403 passes through the upper end of the second bearing block 402 and extends to the bottom of the second bearing block 402.

[0026] See also Figure 3 In this embodiment, the flap assembly 2 includes a first electric cylinder 201, a lifting block 202, a rotating column 203, a connecting block 204, a flipping block 205 and a first gear ring 206; the limit baffle 106 is in a "U" shape; the inner walls of the front and rear ends of the limit baffle 106 are fixedly connected with the first electric cylinder 201; the lower end of the telescopic rod of the first electric cylinder 201 is fixedly connected with the lifting block 202; the left and right ends of the lifting block 202 are rotatably installed with rotating columns 203; the ends of the two rotating columns 203 that are close to each other are fixedly connected with the connecting block 204; the front end of the connecting block 204 is fixedly connected with the flipping block 205; the lower end of the connecting block 204 is in contact with the upper end of the conveyor belt of the belt conveyor 104; the outer wall of the right end of the rotating column 203 is fixedly connected with the first gear ring 206.

[0027] See also Figure 4In this embodiment, the brake assembly 3 includes a first bearing block 301, a second electric cylinder 302, a fixed cylinder 303, a first motor 304 and a gear 305; the right end of the limit baffle 106 is fixedly connected to the first bearing block 301; the upper end of the first bearing block 301 is fixedly connected to the second electric cylinder 302; the upper end of the telescopic rod of the second electric cylinder 302 is fixedly connected to the fixed cylinder 303; the inner wall of the fixed cylinder 303 is fixedly connected to the first motor 304; the left end of the output shaft of the first motor 304 is fixedly connected to the gear 305; the gear 305 is meshed with the first gear ring 206.

[0028] See also Figure 5 In the present embodiment, the clamping assembly 5 comprises a lifting plate 501, a first slot body 502, a fourth electric cylinder 503, a clamping block 504, a limiting hole 505, a third bearing block 506 and a limiting column 507; the lower end of the telescopic rod of the third electric cylinder 403 passes through the second bearing block 402 and is fixedly connected to the lifting plate 501; the left and right ends of the lifting plate 501 pass through the first slot body 502 which is symmetrically provided; the inner wall of the first slot body 502 is fixedly connected to the fourth electric cylinder 503 which is oppositely arranged; the telescopic rod of the fourth electric cylinder 503 is fixedly connected to the clamping block 504; the left and right ends of the clamping block 504 pass through the limiting hole 505; the upper end of the lifting plate 501 is fixedly connected to the third bearing block 506 which is symmetrical; the left and right ends of the third bearing block 506 are fixedly connected to the limiting column 507; the outer wall of the limiting column 507 is in contact with the inner wall of the limiting hole 505.

[0029] See also Figure 6 In this embodiment, the pushing assembly 6 includes a fixed seat 601, a bearing seat 602, a second motor 603, a screw rod 604, a threaded sleeve 605 and a push plate 606; the lower end of the lifting plate 501 is fixedly connected to the fixed seat 601; the lifting plate 501 is fixedly connected to the bearing seat 602; the front end of the fixed seat 601 is fixedly connected to the second motor 603; the rear end of the output shaft of the second motor 603 passes through the fixed seat 601 and is fixedly connected to the screw rod 604; the rear end outer wall of the screw rod 604 is in contact with the inner wall of the bearing seat 602; the outer wall of the screw rod 604 is movably mounted with a threaded sleeve 605; the lower end of the threaded sleeve 605 is fixedly connected to the push plate 606.

[0030] During the work, when it is necessary to transport the large plate, the large plate is placed on the upper end of the plurality of limit baffles 106, the transport component 1 is turned on to transport the large plate to the lifting component 4, and then the lifting component 4 is turned on to adjust the height of the clamping component 5, the clamping component 5 is turned on to clamp the large plate, and the push component 6 is turned on to push the large plate out of the clamping component 5 to connect to the next process;

[0031] When the large plate needs to be turned over, the belt conveyor 104 is first turned on to move the large plate to the upper end of the two turning blocks 205, and then the first motor 304 is turned on to rotate the gear 305, the gear 305 drives the first gear ring 206 to rotate, the first gear ring 206 drives the rotating column 203 to rotate, the rotating column 203 drives the connecting block 204 to rotate, and the connecting block 204 drives the two turning blocks 205 to rotate to turn the large plate over;

[0032] After the large plate is turned over, the belt conveyor 104 is turned on again to move the large plate to the bottom of the lifting assembly 4, the third electric cylinder 403 is turned on to extend the telescopic rod of the third electric cylinder 403 downward, and the clamping assembly 5 is lifted and lowered, and then the two fourth electric cylinders 503 with opposite output directions are turned on to move the two clamping blocks 504 away from or close to each other to clamp the large plate;

[0033] When it is necessary to remove the large plate clamped on the clamping assembly 5, the second motor 603 is turned on to rotate the screw rod 604, and the wire sleeve 605 moves along the outer wall of the screw rod 604, thereby driving the push plate 606 to move, and the push plate 606 moves the large plate on the clamping assembly 5 out to connect to the next process.

[0034] Through the above steps, when in use, the large plate is placed on the conveying component 1, the conveying component 1 is turned on to convey the large plate to the lifting component 4, and then the lifting component 4 is turned on to adjust the height of the clamping component 5, the clamping component 5 is turned on to clamp the large plate, and the pushing component 6 is turned on to push the large plate from the clamping component 5, and then the next process is connected. When it is necessary to turn the large plate over, first turn on the conveying component 1 to move the large plate to the flip plate component 2, and then turn on the braking component 3 to make the flip plate component 2 flip the large plate. The flipping of the large plate can be manually assisted during flipping, so that the large plate can be quickly flipped. Turning on the conveying component 1 again can move the large plate to the lifting component 4, which solves the problem that the parts lifting mechanism in the prior art is not convenient for quickly and stably flipping the large plate, and it is not convenient to move the large plate to a suitable height after quickly flipping it for the next process.

[0035] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A parts lifting mechanism for a large panel assembly line, comprising a conveying assembly (1); characterized in that: The conveying assembly (1) further comprises a flap assembly (2), a brake assembly (3), a lifting assembly (4), a clamping assembly (5) and a pushing assembly (6); the upper end of the conveying assembly (1) is provided with a flap assembly (2) for flipping; the conveying assembly (1) is provided with a brake assembly (3) for braking; the upper end of the conveying assembly (1) is provided with a lifting assembly (4) for lifting; the lifting assembly (4) is provided with a clamping assembly (5) for clamping a large plate; the clamping assembly (5) is provided with a pushing assembly (6) for pushing the large plate.

2. The part lifting mechanism for a large panel assembly line according to claim 1, characterized in that: The conveying assembly (1) comprises a bottom plate (101), a support frame (102), a fixing plate (103), a belt conveyor (104), rubber bumps (105) and a limit baffle (106); the upper end of the bottom plate (101) is fixedly connected to the support frame (102); the upper end of the support frame (102) is fixedly connected to a symmetrical fixing plate (103); the upper end of the support frame (102) is provided with a belt conveyor (104); the conveyor belt of the belt conveyor (104) is fixedly connected to rubber bumps (105) distributed evenly; the upper end of the bottom plate (101) is fixedly connected to a symmetrical limit baffle (106); the thickness of the limit baffle (106) is three centimeters.

3. The part lifting mechanism for a large panel assembly line according to claim 2 is characterized in that: The flap assembly (2) comprises a first electric cylinder (201), a lifting block (202), a rotating column (203), a connecting block (204), a flipping block (205) and a first gear ring (206); the limit baffle (106) is in a "U" shape; the first electric cylinder (201) is fixedly connected to the inner walls of the front and rear ends of the limit baffle (106); the lifting block (202) is fixedly connected to the lower end of the telescopic rod of the first electric cylinder (201); the rotating columns (203) are rotatably installed through the left and right ends of the lifting block (202); the connecting block (204) is fixedly connected to one end of the two rotating columns (203) close to each other; the flipping block (205) is fixedly connected to the front end of the connecting block (204); the lower end of the connecting block (204) is in contact with the upper end of the conveyor belt of the belt conveyor (104); and the first gear ring (206) is fixedly connected to the outer wall of the right end of the rotating column (203).

4. The part lifting mechanism for a large panel assembly line according to claim 3 is characterized in that: The brake assembly (3) comprises a first bearing block (301), a second electric cylinder (302), a fixed cylinder (303), a first motor (304) and a gear (305); the right end of the limit baffle (106) is fixedly connected to the first bearing block (301); the upper end of the first bearing block (301) is fixedly connected to the second electric cylinder (302); the upper end of the telescopic rod of the second electric cylinder (302) is fixedly connected to the fixed cylinder (303); the inner wall of the fixed cylinder (303) is fixedly connected to the first motor (304); the left end of the output shaft of the first motor (304) is fixedly connected to the gear (305); The gear (305) is meshed with the first gear ring (206).

5. The part lifting mechanism for a large panel assembly line according to claim 2 is characterized in that: The lifting assembly (4) comprises a frame (401), a second bearing block (402) and a third electric cylinder (403); the upper end of the bottom plate (101) is fixedly connected to the frame (401); the upper end of the frame (401) is fixedly connected to the second bearing block (402); the upper end of the second bearing block (402) is fixedly connected to the third electric cylinder (403); the lower end of the telescopic rod of the third electric cylinder (403) passes through the upper end of the second bearing block (402) and extends to the bottom of the second bearing block (402).

6. The part lifting mechanism for a large panel assembly line according to claim 5, characterized in that: The clamping assembly (5) comprises a lifting plate (501), a first slot body (502), a fourth electric cylinder (503), a clamping block (504), a limiting hole (505), a third bearing block (506) and a limiting column (507); the lower end of the telescopic rod of the third electric cylinder (403) passes through the second bearing block (402) and is fixedly connected to the lifting plate (501); the left and right ends of the lifting plate (501) pass through the first slot body (502) which is symmetrical; the first slot body (502) ) is fixedly connected to the inner wall of a fourth electric cylinder (503) which is arranged opposite to the inner wall of the lifting plate (501); a clamping block (504) is fixedly connected to the telescopic rod of the fourth electric cylinder (503); limiting holes (505) are provided through the left and right ends of the clamping block (504); a symmetrical third bearing block (506) is fixedly connected to the upper end of the lifting plate (501); the left and right ends of the third bearing block (506) are fixedly connected to limiting columns (507); and the outer wall of the limiting column (507) is in contact with the inner wall of the limiting hole (505).

7. The part lifting mechanism for a large panel assembly line according to claim 6, characterized in that: The push assembly (6) comprises a fixed seat (601), a bearing seat (602), a second motor (603), a screw rod (604), a threaded sleeve (605) and a push plate (606); the lower end of the lifting plate (501) is fixedly connected to the fixed seat (601); the lifting plate (501) is fixedly connected to the bearing seat (602); the front end of the fixed seat (601) is fixedly connected to the second motor (603); the rear end of the output shaft of the second motor (603) passes through the fixed seat (601) and is fixedly connected to the screw rod (604); the rear end outer wall of the screw rod (604) is in contact with the inner wall of the bearing seat (602); the outer wall of the screw rod (604) is movably mounted with a threaded sleeve (605); the lower end of the threaded sleeve (605) is fixedly connected to the push plate (606).