Negative pressure suction cup type primary flue-cured tobacco leaf layered taking and placing device based on servo control

Abstract

The utility model relates to a negative pressure sucker type flue-cured tobacco leaf layered picking and placing device based on servo control, which is characterized by comprising a sucker mechanism for sucking and placing flue-cured tobacco leaves in a tobacco leaf storage box, a first lifting mechanism for controlling the sucker mechanism to lift, and a leaf protecting mechanism arranged on a machine body and positioned beside the sucker mechanism, the leaf protection mechanism comprises a leaf protection mechanism main frame fixed to the machine body, a leaf protection rod rotating shaft rotationally connected to the leaf protection mechanism main frame and located on the outer side of the suction cup mechanism, and a plurality of leaf protection rods vertically fixed to the leaf protection rod rotating shaft and arranged at intervals. A first driving mechanism capable of driving the leaf protecting rod rotating shafts and the leaf protecting rods to rotate is arranged on the leaf protecting mechanism main frame, and the leaf protecting rods are located at folding and unfolding stations under the action of the first driving mechanism; the negative pressure suction cup type primary flue-cured tobacco leaf layered taking and placing device based on servo control is reasonable in design, and tobacco leaves of different forms can be adsorbed easily.

Description

Technical fields:

[0001] This utility model relates to a servo-controlled negative pressure suction cup type layered picking and placing device for pre-cured tobacco leaves. Background technology:

[0002] Currently, the quality of newly cured tobacco leaves needs to be differentiated. The traditional method of differentiation is done manually, which is inefficient and labor-intensive.

[0003] To achieve mechanized identification, current methods involve conveying tobacco leaves via a conveyor belt with a detection camera above it. Before the piles of tobacco leaves enter the conveyor belt, they need to be transferred by a negative pressure suction cup. Currently, the negative pressure suction cups use multiple silicone heads for suction. However, because the shape of the tobacco leaves after initial curing varies, the existing negative pressure suction cup mechanism cannot effectively hold the tobacco leaves of different shapes (i.e., the suction force is insufficient for some tobacco leaves), resulting in frequent suction failures.

[0004] Currently, a Chinese patent application, CN204607220U, titled "X-axis Horizontal Transverse Dual Lifting Adsorption System," has been found. This system includes a support frame, two parallel X-axis guide rails mounted on the support frame, an upper connecting frame connected to the two X-axis guide rails via a slider, an X-axis servo drive mechanism for driving the upper connecting frame to move along the X-axis guide rails, a PCB adsorption mechanism connecting frame fixedly connected to the lower end of the upper connecting frame, a PCB vacuum adsorption mechanism located below the PCB adsorption mechanism connecting frame, a PCB lifting servo drive mechanism mounted on the PCB suction cup assembly connecting frame for driving the PCB vacuum adsorption mechanism to lift, a paper-separating adsorption mechanism connecting frame fixedly connected to the lower end of the upper connecting frame, a paper-separating vacuum adsorption mechanism located below the paper-separating adsorption mechanism connecting frame, and a paper-separating lifting servo drive mechanism mounted on the paper-separating nozzle assembly connecting frame for driving the paper-separating vacuum adsorption mechanism. Although the lifting of this vacuum adsorption device is driven by a servo motor, resulting in more precise movements and the ability to adsorb thin plates without indentation, it is not suitable for adsorbing irregularly shaped tobacco leaves. Summary of the Invention:

[0005] In view of the above-mentioned problems, the purpose of this utility model is to propose a servo-controlled negative pressure suction cup type layered picking and placing device for primary roasted tobacco leaves. This servo-controlled negative pressure suction cup type layered picking and placing device for primary roasted tobacco leaves is reasonably designed and is conducive to adsorbing tobacco leaves of different shapes.

[0006] This utility model is achieved using the following solution:

[0007] This utility model relates to a servo-controlled negative pressure suction cup type layered loading and unloading device for first-cured tobacco leaves, characterized in that it includes a suction cup mechanism for loading and unloading first-cured tobacco leaves located in a tobacco storage box, a first lifting mechanism for controlling the lifting and lowering of the suction cup mechanism, and a leaf protection mechanism located on the machine body and beside the suction cup mechanism. The leaf protection mechanism includes a main frame fixed on the machine body, a leaf protection rod shaft rotatably connected to the main frame and located outside the suction cup mechanism, and multiple leaf protection rods vertically fixed to the leaf protection rod shaft at intervals. The main frame of the leaf protection mechanism is provided with a first driving mechanism capable of driving the leaf protection rod shaft and the leaf protection rods to rotate. Under the action of the first driving mechanism, the leaf protection rods are in a retracting and unfolding position.

[0008] Furthermore, the aforementioned suction cup mechanism includes a suction cup main beam and multiple sets of parallel suction cup branches fixedly disposed below the suction cup main beam. Multiple strip-shaped suction cup air inlet grooves are arranged on the lower surface of the suction cup branches. The suction cup air inlet grooves are connected to the suction cup branches and the negative pressure chamber inside the suction cup main beam. The suction cup main beam is provided with a suction cup air outlet connected to the negative pressure mechanism.

[0009] Furthermore, the aforementioned first lifting mechanism includes a first outer shell, a servo motor fixed to the upper part of the first outer shell, and a synchronous belt mechanism disposed on the output end of the servo motor. An upper plate is fixedly connected to the belt of the synchronous belt mechanism. Two pulleys of the synchronous belt mechanism are respectively disposed on the upper and lower parts of the first outer shell. First guide rods are fixedly connected to both sides of the upper plate. The lower end of the first guide rod extends out of the lower part of the first outer shell and is fixedly connected to the lower plate. The lower surface of the lower plate is connected to the upper surface of the suction cup main beam through several springs.

[0010] Furthermore, the main frame of the aforementioned leaf-protecting mechanism includes a main beam fixedly mounted on the machine body and cantilever rods vertically connected to both ends of the main beam. The leaf-protecting rod shaft has two parallel shafts, one close to the main beam and the other close to the free end of the cantilever rod. Both ends of the leaf-protecting rod shaft are rotatably connected to the cantilever rod. Two oppositely arranged leaf-protecting rod drive cylinders are fixedly installed on the inner side of one cantilever rod. The free ends of the extension rods of the leaf-protecting rod drive cylinders are connected to the leaf-protecting rod shafts through a swing arm. Under the action of the leaf-protecting rod drive cylinders, the two leaf-protecting rod shafts and the leaf-protecting rods swing relative to each other. The first drive mechanism is the leaf-protecting rod drive cylinder.

[0011] Furthermore, a limiting plate is fixedly installed on the inner side of the aforementioned cantilever rod and sleeved on the leaf guard rod shaft. The limiting plate is provided with two protruding pins. One end of the swing arm is fixed on the leaf guard rod shaft, and the other end of the swing arm is hinged to the free end of the telescopic rod of the leaf guard rod drive cylinder. The two protruding pins are located on both sides of the swing arm to limit its swing angle.

[0012] Furthermore, the aforementioned negative pressure mechanism includes a blower installed in the lower part of the machine body, a main air duct connected to the inlet of the blower, and an air outlet connected to the outlet of the blower. A side air pipe is connected to the main air duct. A main air duct butterfly valve is provided at the inlet of the main air duct, and a side air duct butterfly valve is provided at the inlet of the side air pipe. The inlet of the main air duct is connected to the suction cup air outlet.

[0013] The working method of this utility model is based on a servo-controlled negative pressure suction cup type layered picking and placing device for first-cured tobacco leaves. Since the main frame of the leaf protection mechanism is provided with a first driving mechanism that can drive the leaf protection rod shaft and the leaf protection rod to rotate, the leaf protection rod is in the retracting and unfolding position under the action of the first driving mechanism. When the leaf protection rod is retracted, it is flush with or nearly flush with the suction lower surface of the suction cup mechanism so as to support the first-cured tobacco leaves adsorbed by the suction cup mechanism. When the leaf protection rod is unfolded, it is perpendicular to the suction lower surface of the suction cup mechanism and does not interfere with the lifting and lowering action of the suction mechanism.

[0014] By using the leaf-protecting rod to support the tobacco leaves when the working station is closed, the adsorption mechanism can provide support when facing tobacco leaves of different shapes with small adsorption areas and insufficient adsorption force, thus preventing the adsorbed tobacco leaves from falling off and affecting the adsorption efficiency. Attached image description:

[0015] The present invention will be further described below with reference to the accompanying drawings;

[0016] Figure 1 , Figure 2 It is a three-dimensional diagram of two devices for the layered absorption and output of primary flue-cured tobacco leaves (the outer shell and part of the frame of the machine are omitted).

[0017] Figure 3 It is a three-dimensional diagram of the tobacco storage box and the film self-sealing packaging mechanism in the stratified absorption and output equipment for primary flue-cured tobacco leaves;

[0018] Figure 4 It is a 3D view of a tobacco storage box;

[0019] Figure 5 This is a partial perspective view of the suction cup mechanism of this utility model;

[0020] Figure 6 This is a partial bottom-view perspective view of the suction cup mechanism of this utility model;

[0021] Figure 7 This is a three-dimensional view of the adsorption mechanism of this utility model;

[0022] Figure 8 This is a perspective view of the leaf-protecting mechanism of this utility model;

[0023] Figure 9 This is a partial perspective view of the leaf-protecting mechanism of this utility model;

[0024] Figure 10 It is a 3D image of the camera and light strip of the equipment for the layered absorption and output of the first-cured tobacco leaves;

[0025] Figure 11 It is a 3D view of the first station of the nested cylinder module of the first-stage flue-cured tobacco leaf layering and output device;

[0026] Figure 12 It is a 3D view of the second station of the nested cylinder module of the first-cured tobacco leaf layering absorption and output device;

[0027] Figure 13 It is a 3D diagram of the third station of the nested cylinder module of the first-cured tobacco leaf layering absorption and output device;

[0028] Figure 14 It is a 3D diagram of the unloading mechanism of the stratified absorption and output equipment for primary flue-cured tobacco leaves;

[0029] Figure 15 yes Figure 1 A partial 3D view;

[0030] Figure 16 yes Figure 2 A partial 3D view;

[0031] Figure 17 This is a schematic diagram of the box in three different work positions. Detailed implementation method:

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] The equipment for stratified suction and output of primary roasted tobacco leaves includes a body 1, a multi-station tobacco storage box B on the body 1, and a primary roasted tobacco leaf stratified pick-and-place device A1 located above the tobacco storage box. The primary roasted tobacco leaf stratified pick-and-place device A1 includes a suction cup mechanism A2 for suction and placement of primary roasted tobacco leaves in the tobacco storage box, a first lifting mechanism A3 for controlling the lifting and lowering of the suction cup mechanism, and a leaf protection mechanism A4 located on the body and next to the suction cup mechanism.

[0034] The first lifting mechanism A3 can be a lifting cylinder, an electric push cylinder, etc. In this application, the first lifting mechanism A3 specifically includes a first outer shell A26 (the first outer shell A26 covers the overall periphery of the first lifting mechanism; for ease of display, most of the components of the first outer shell are omitted in the figure), a servo motor A27 fixed on the upper part of the first outer shell, and a synchronous belt mechanism A28 provided on the output end of the servo motor. An upper plate A29 is fixedly connected to the belt of the synchronous belt mechanism. The two pulleys of the synchronous belt mechanism are respectively provided on the upper and lower parts of the first outer shell (when the servo motor is working, it drives the belt of the synchronous belt mechanism to circulate, thereby driving the upper plate A29 to rise and fall within the first outer shell). The two sides of the upper plate A29 are fixedly connected to the first guide rods A30. The lower end of the first guide rods A30 extends out of the lower part of the first outer shell and is fixedly connected to the lower plate A31. The lower surface of the lower plate A31 is connected to the upper surface of the suction cup main beam A15 through several springs A32. The springs A32 can play a buffering role to avoid excessive pressure damage to the tobacco leaves.

[0035] The suction cup mechanism A2 includes a suction cup main beam A15 and multiple sets of parallel suction cup branches A16 vertically fixed below the suction cup main beam (both the suction cup main beam A15 and the suction cup branches A16 can be thin shells made of stainless steel). The lower surface of the suction cup branches A16 is provided with multiple strip-shaped suction cup air inlet slots A17 (a 1cm thick sponge can be attached to the suction cup air inlet slots for cushioning to reduce damage to the tobacco leaves during operation). The suction cup air inlet slots A17 are connected to the negative pressure chambers in the suction cup branches A16 and the suction cup main beam A15. The suction cup main beam is provided with a suction cup air outlet A25 connected to the negative pressure mechanism A18. Under the action of the negative pressure mechanism, the suction cup air inlet slots A17 of the suction cup branches A16 generate negative pressure for adsorbing tobacco leaves.

[0036] The specific negative pressure mechanism A18 includes a blower A19 installed in the lower part of the body, a main air duct A20 connected to the inlet of the blower, and an air outlet A21 connected to the outlet of the blower. A side air duct A22 is connected to the main air duct A20. A main air duct butterfly valve A23 is provided at the inlet of the main air duct A20, and a side air duct butterfly valve A24 is provided at the inlet of the side air duct A22. The inlet of the main air duct is connected to the suction cup air outlet A25 on the suction cup main beam A15 through a pipeline.

[0037] During operation, the air pump A19 operates continuously. The opening and closing states of the two butterfly valves (main air duct butterfly valve A23 and side air duct butterfly valve A24) are mutually exclusive (i.e., opposite). When the main air duct butterfly valve is open and the side air duct butterfly valve is closed, negative pressure is generated in the main air duct and the suction cup inlet groove A17, etc., that is, the suction cup generates negative pressure to suck up the tobacco leaves. Conversely, when the main air duct butterfly valve is closed and the side air duct butterfly valve is open, negative pressure is generated in the side air duct, and there is no negative pressure at the suction cup inlet groove A17, that is, the suction cup does not generate negative pressure, and the suction cup unloads the tobacco leaves. This structure can repeatedly generate negative pressure on the suction cup inlet groove A17 of the suction cup mechanism, while avoiding the problems of easy damage to the air pump A19 due to repeated opening and closing and insufficient negative pressure.

[0038] The leaf protection mechanism A4 includes a main frame A5 fixed to the body, a leaf protection rod shaft A6 rotatably connected to the main frame and located outside the suction cup mechanism, and multiple spaced leaf protection rods A7 vertically fixed to the shaft. The main frame A5 is equipped with a first drive mechanism A8 (which can be a cylinder, electric cylinder, etc.) capable of driving the shaft A6 and the leaf protection rods A7 to rotate. Under the action of the first drive mechanism, the leaf protection rods are in a retracting and unfolding position. In the retracting position, the leaf protection rods A7 adhere to the lower surface of the suction cup mechanism A2 (i.e., the suction cup air inlet groove A17). The lower surface of the leaf guard rod is flush or nearly flush with the suction cup mechanism to support the first-cured tobacco leaves adsorbed by the suction cup mechanism. When the working position is extended, the leaf guard rod is perpendicular to the lower surface of the suction cup mechanism and does not interfere with the lifting and lowering action of the suction mechanism. That is, the leaf guard rod swings repeatedly between the horizontal and vertical working positions. When the suction mechanism adsorbs tobacco leaves, some tobacco leaves may fall off easily due to insufficient adsorption area. When the leaf guard rod swings to the horizontal working position, it supports the tobacco leaves adsorbed by the suction mechanism. When the suction mechanism needs to lift and lower (mainly downward to adsorb tobacco leaves), the leaf guard rod swings to the vertical working position to avoid the lifting and lowering action of the suction mechanism.

[0039] The main frame A5 of the leaf-protecting mechanism includes a main beam A9 fixedly mounted on the machine body and cantilever rods A10 vertically connected to both ends of the main beam. The leaf-protecting rod pivot A6 has two shafts parallel to the main beam A9. One pivot A6 is closer to the main beam A9, and the other pivot A6 is closer to the free end of the cantilever rod (i.e., farther from the main beam A9). Both ends of the leaf-protecting rod pivot A6 are rotatably connected to the cantilever rod A10. Two phases are fixedly mounted on the inner side of one cantilever rod. The back-mounted leaf guard rod drive cylinder A11 (the first drive mechanism A8 is the leaf guard rod drive cylinder A11) has its free end of the telescopic rod connected to the leaf guard rod rotating shaft A6 via a swing arm A12. Under the action of the leaf guard rod drive cylinder A11, the two leaf guard rod rotating shafts A6 and the leaf guard rod A7 swing relative to each other (that is, the leaf guard rod A7 rotates around the axis of the leaf guard rod rotating shaft A6), realizing the switching of the leaf guard rod A7 between the horizontal and vertical working positions.

[0040] A limiting plate A13 is fixedly installed on the inner side of the aforementioned cantilever rod A10 and sleeved on the leaf guard rod shaft A6. The limiting plate A13 is provided with two spaced protrusions A14. One end of the swing arm A12 is fixed on the leaf guard rod shaft A6, and the other end of the swing arm A12 is hinged to the free end of the telescopic rod of the leaf guard rod drive cylinder A11. The two protrusions A14 are located on both sides of the swing arm to limit its swing angle. Under the action of the telescopic rod of the leaf guard rod drive cylinder A11, the cantilever rod A10 and the leaf guard rod shaft A6 rotate. Through the limiting of the two protrusions A14, the leaf guard rod A7 can be limited to move within the horizontal and vertical working positions.

[0041] The multi-station tobacco storage box B includes a nested cylinder module B1 mounted on the machine body and a box body B2 mounted on the nested cylinder module. The box body B2 includes a box body B3 to be inspected and a box body B4 after inspection. The nested cylinder module B1 includes two outer outer linkage cylinders B5 arranged side by side and an inner cylinder B6 located between the two outer outer linkage cylinders. The free ends of the piston push rods of the outer outer linkage cylinders B5 and the inner cylinder B6 are fastened together by a cylinder push rod connecting block B7 (that is, the outer outer linkage cylinders B5 and the inner cylinder B6 face the same direction). The cylinder bodies of the two outer linkage cylinders B5 are fixed to the machine body 1, and the cylinder body of the inner cylinder B6 is fixed. A mounting sleeve B0 is fixedly connected to the bottom plate B8 of the housing B2. Under the linkage of the outer sleeve cylinder and the inner sleeve cylinder, the housing can be in three working positions (that is, the nested cylinder module B1 has three working positions). In the first working position, the piston rod of the outer sleeve cylinder extends and the piston rod of the inner sleeve cylinder retracts, so that the housing B3 to be inspected, which is mounted on the nested cylinder module B1, extends out of the machine body, so that the uncured tobacco leaves (a whole bundle of uncured tobacco leaves weighing several kilograms) to be inspected can be put into the housing to be inspected from outside the machine body. In the second working position, the piston rod of the outer sleeve cylinder retracts and the piston rod of the inner sleeve cylinder retracts. This moves the inspection box (and the uncured tobacco leaves inside it) directly below the detection camera B10 inside the machine, allowing the camera to detect the uncured tobacco leaves on the surface of the inspection box (the specific method for camera detection and identification of the uncured tobacco leaves on the surface of the inspection box and the grade of tobacco leaves are existing technologies and will not be elaborated here). The inspection box is then positioned directly below the liftable suction cup mechanism to allow the uncured tobacco leaves sucked up from the previous process (except for the first time when the inspection box receives tobacco leaves from outside the machine) to be placed into the inspection box. At the third station, the piston rod of the outer linkage cylinder retracts, and the piston rod of the inner cylinder extends. This allows the inspection chamber to be positioned directly below the lifting suction cup mechanism, enabling the suction cup mechanism to pick up the surface layer of the first-cured tobacco leaves that have already been inspected in the inspection chamber. Then, the outer linkage cylinder and the inner cylinder return to the second working position (i.e., the piston rod of the outer linkage cylinder retracts, and the piston rod of the inner cylinder retracts). The suction cup mechanism then puts the first-cured tobacco leaves picked up in the third working position into the inspection chamber, and the detection camera inside the machine re-inspects and identifies the surface layer of the first-cured tobacco leaves in the inspection chamber. This process is repeated until all the first-cured tobacco leaves in the inspection chamber have been inspected and identified. During this process, the tobacco leaves put into the inspection chamber several times can be packaged and output.

[0042] The bottom plate B8 of the aforementioned box is supported on both sides and moves on the horizontal track B9 of the machine body. The bottom surface of the bottom plate B8 is provided with a fixing block that cooperates with the horizontal track B9. The detection camera B10 installed on the machine body is located directly above the center of the box B2 to be inspected in the second station (the adsorption mechanism is located directly above the center of the box B3 after inspection in the second station). Four strip-shaped homogeneous light strips B11 are provided around the detection camera to form a rectangular illumination area with uniform irradiation. The height and illumination angle of the strip-shaped light strips are adjustable.

[0043] The specific adjustable structure for the height and illumination angle of the light strip is as follows: Two parallel and spaced light source mounting brackets B12 are installed on the body. Strip grooves B13 are provided on the lower sides of the mounting brackets. Lugs B14 with screw holes are flush at both ends of the two light strips. Bolts B15 pass through the screw holes and strip grooves for fixation. A lifting U-shaped plate B16 is provided in the middle of the mounting bracket. Racetrack-shaped grooves B17 are provided on both sides of the lifting U-shaped plate. Bolts passing through the racetrack-shaped grooves are provided on the mounting bracket to adjust the height of the lifting U-shaped plate. A buckle B18 is provided at the lower part of the lifting U-shaped plate to hold the other two light strips. The buckle B18 is rotatably and adjustablely connected to the lower part of the lifting U-shaped plate.

[0044] By loosening bolt B15, the lifting and illumination angles of the two strip light strips can be adjusted. By loosening the bolt passing through the racetrack-shaped groove B17, the lifting and lowering of the other two strip light strips can be adjusted.

[0045] To achieve tobacco leaf packaging, a film self-sealing packaging mechanism D with a pressing function is installed on the machine body 1. The film self-sealing packaging mechanism D includes a base plate B8 on the box body, a vertical plate D1 on the base plate, and a vertical guide rail D2 fixed on the vertical plate. A sealing drive plate D3 (which can slide vertically on the vertical guide rail D2) is slidably connected to the vertical guide rail D2. The sealing drive plate D3 is driven to rise and fall by a third lifting drive mechanism D4 fixed on the vertical plate (this third lifting drive mechanism D4 can be an electric cylinder or a pneumatic cylinder, etc.). A penetration groove D5 is provided in the middle of the base plate B8 (this penetration groove is located at the bottom of the inspection box B4). Mounting brackets D6 and sealing brackets D7 rotatably connected to the mounting brackets are provided on both sides of the penetration groove D5. Sealing brackets D7 are equipped with a sealing roll D8 and a sealing kit D9 (which is prior art, including...). The sealing support D7 is connected to a sealing frame drive shaft D10 along its length. The sealing frame drive shaft D10 is connected to the sealing drive plate D3 via a sealing frame power rocker arm D11. When the third lifting drive mechanism drives the sealing drive plate D3 to rise and fall, the sealing support D7 is driven to swing and cover the penetration groove D5 via the sealing frame power rocker arm D11 and the sealing frame drive shaft D10. Conversely, the penetration groove D5 is opened. During operation, after the aforementioned suction cup mechanism has placed the detected and identified tobacco leaves into the inspection box several times, the tobacco leaves in the inspection box can be packaged. During packaging, the third lifting drive mechanism drives the sealing drive plate D12 to move, which in turn drives the sealing frame drive shaft D10 and the sealing support D7 to swing, so that the two sealing kits D9 come together. After they come together, the heating wire sealing and cutting are started to realize the packaging action.

[0046] The box B2 includes a box to be inspected B3 and a box after inspection B4. There is a middle partition cavity B21 between the box to be inspected and the box after inspection to accommodate a mounting bracket and a sealing film support on one side. The two side walls of the box after inspection B4 are provided with notches B41 to allow the sealing film support D7 to swing.

[0047] In order to flatten and tighten the tobacco leaves in the inspection box B4 during packaging, a tobacco leaf pressing mechanism C is provided on the machine body. The tobacco leaf pressing mechanism includes a second lifting mechanism C1 (the second lifting mechanism can be a cylinder, electric push cylinder, etc.) and two outer fixed pressure plates C2 fixedly connected to the lower end of the telescopic rod of the second lifting mechanism and spaced apart. The inner sides of the two outer fixed pressure plates are rotatably connected to an openable middle flipping pressure plate C3 located between the two outer fixed pressure plates.

[0048] The second lifting mechanism C1 includes a second outer shell (the second outer shell is omitted in the figure for easy viewing of the internal structure; the second lifting mechanism C1 and the second outer shell are fixed to the machine body) and a fixed cylinder C5 disposed in the second outer shell. The telescopic rod of the fixed cylinder extends downward through the second outer shell C4 and is fixedly connected to the lower horizontal plate C6. The lower horizontal plate C6 has second guide rods C7 on both sides that slide in cooperation with guide sleeves on the second outer shell. Side frames C8 are fixedly disposed below the two sides of the lower horizontal plate (the outer fixed pressure plate C2 is fixed to the lower part of the side frame C8). The side frames C8 are respectively connected to pressure plate flipping cylinders C9. The free end of the telescopic rod of the pressure plate flipping cylinder is rotatably connected to the middle part of the intermediate flipping pressure plate C3. Under the drive of the pressure plate flipping cylinder C9, the intermediate flipping pressure plate C3 can be in a position flush with the outer fixed pressure plate C2 or in a position perpendicular to the outer fixed pressure plate C2.

[0049] The aforementioned film sealing bracket D7 swing area is directly opposite the flipping area of ​​the intermediate flipping pressure plate C3, so that the intermediate flipping pressure plate flips up during film sealing. The intermediate flipping pressure plate C3 not only flattens and tightens the middle position of the tobacco leaf in the box after inspection, but also effectively avoids the flipping action of the film sealing bracket D7.

[0050] To facilitate the output of packaged tobacco leaves, the machine body is equipped with a unloading mechanism E. The unloading mechanism includes a base plate B8 and an unloading plate E1 that is flipped and connected to a through slot E5 on the base plate. The first side of the unloading plate is fixedly connected to an unloading shaft E2, which is rotatably connected to a bearing seat E3 on the base plate. A curved unloading shaft drive arm E4 (specifically L-shaped) is fixedly connected to the unloading shaft E2. A fourth lifting mechanism E5 is fixedly connected to the base plate. The free end of the telescopic rod of the fourth lifting mechanism is rotatably connected to the free end of the unloading shaft drive arm E4. When the fourth lifting mechanism E5 drives the telescopic rod to extend or retract, it causes the unloading plate to close and open the through slot. When the unloading plate is closed, it can receive the tobacco leaves. When the through slot is open, the packaged tobacco leaves fall through the through slot and are output.

[0051] The lower part of the machine has a chamber for receiving the packaged tobacco leaves. After all the tobacco leaves have been packaged, they can be taken out from this chamber.

[0052] To make the unloading plate more stable when it closes, a corner cylinder E6 and a corner cylinder rotating arm E7 driven by the corner cylinder are provided on the second side of the through groove. When the corner cylinder rotating arm E7 swings, it supports the second side of the unloading plate E1 (when the corner cylinder rotating arm E7 swings in the opposite direction, it avoids the opening of the unloading plate E1). When the unloading plate E1 closes, it is supported by the corner cylinder rotating arm E7, which makes the closing of the unloading plate E1 more stable and reliable. Even the downward pressing action of the tobacco leaf pressing mechanism C can ensure the closing of the unloading plate E1.

[0053] The original images of the tobacco leaves and their corresponding grade information obtained by the camera during the layered identification process are stored in real time by the active device in the equipment. After the entire bundle of tobacco leaves has been layered and graded, the monitoring system provides a comprehensive grade evaluation result for the entire bundle of tobacco leaves according to a preset comprehensive grade evaluation method. The evaluation result can be displayed on the human-machine interface touch screen of the equipment and a QR code strip can be automatically printed (the QR code strip can be affixed to the packaged tobacco leaves) for subsequent scanning to query the identification result. The data and test results of each test process are uploaded to a remote server after the workflow is completed for subsequent comprehensive traceability query and analysis evaluation (this content is existing technology and will not be described in detail here).

[0054] The working method of the equipment for layered suction and output of first-cured tobacco leaves is as follows: Initially, the box is in the first station. At this time, the first-cured tobacco leaves to be inspected are placed into the inspection box. Then, the nested cylinder module moves the box to the second station. At this time, the camera detects the first-cured tobacco leaves on the surface of the inspection box. Then, the nested cylinder module moves the box to the third station. At this time, the suction cup mechanism picks up the first-cured tobacco leaves on the surface of the inspection box. Then, the outer linkage cylinder and the inner cylinder return to the second station. The suction cup mechanism puts the first-cured tobacco leaves picked up in the third station into the post-inspection box. The detection camera inside the machine then detects the first-cured tobacco leaves on the surface of the inspection box again. This cycle is repeated several times. When the first-cured tobacco leaves in the post-inspection box reach a certain amount, the nested cylinder module moves the box to the third station. The tobacco leaf pressing mechanism starts to operate, causing the outer fixed pressing plate to press and flatten both ends of the virgin tobacco leaf. At the same time, the middle flipping pressing plate flips and presses and flattens the middle of the virgin tobacco leaf. Then, the middle flipping pressing plate flips up to avoid the flipping of the sealing film support. The flipping of the two sealing film supports brings the sealing film kit closer and heat-fuses the sealing film output from the drum. The sealing film wraps around the virgin tobacco leaf in the inspection box. Finally, the fourth lifting mechanism operates, causing the unloading plate to open and the penetration slot to open. The virgin tobacco leaf in the inspection box falls due to gravity, completing the wrapping and output of a stack of virgin tobacco leaf. Then, the unloading plate returns to close the penetration slot. At this time, the tobacco leaf pressing mechanism operates again so that the outer fixed pressing plate can lay the sealing film output from the drum flat in the inspection box, so that the tobacco leaf subsequently put into the inspection box is located on the sealing film.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves, characterized in that: The device includes a suction cup mechanism for sucking up and dropping first-cured tobacco leaves in a tobacco storage box, a first lifting mechanism for controlling the lifting and lowering of the suction cup mechanism, and a leaf protection mechanism located on the machine body and next to the suction cup mechanism. The leaf protection mechanism includes a main frame fixed to the machine body, a leaf protection rod shaft rotatably connected to the main frame and located outside the suction cup mechanism, and multiple leaf protection rods spaced apart and vertically fixed to the leaf protection rod shaft. The main frame of the leaf protection mechanism is provided with a first driving mechanism that can drive the leaf protection rod shaft and the leaf protection rods to rotate. The leaf protection rods are in a retracting and unfolding position under the action of the first driving mechanism.

2. The servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves according to claim 1, characterized in that: The suction cup mechanism includes a suction cup main beam and multiple sets of parallel suction cup branches fixed below the suction cup main beam. The lower surface of the suction cup branches is provided with multiple strip-shaped suction cup air inlet slots. The suction cup air inlet slots are connected to the suction cup branches and the negative pressure chamber inside the suction cup main beam. The suction cup main beam is provided with a suction cup air outlet connected to the negative pressure mechanism.

3. The servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves according to claim 2, characterized in that: The first lifting mechanism includes a first outer shell, a servo motor fixed on the upper part of the first outer shell, and a synchronous belt mechanism on the output end of the servo motor. An upper plate is fixedly connected to the belt of the synchronous belt mechanism. Two pulleys of the synchronous belt mechanism are respectively set on the upper and lower parts of the first outer shell. First guide rods are fixedly connected to both sides of the upper plate. The lower end of the first guide rod passes through the lower part of the first outer shell and is fixedly connected to the lower plate. The lower surface of the lower plate is connected to the upper surface of the suction cup main beam through several springs.

4. The servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves according to claim 3, characterized in that: The main frame of the leaf protection mechanism includes a main beam fixedly installed on the machine body and cantilever rods vertically connected to both ends of the main beam. The leaf protection rod shaft has two parallel shafts, one close to the main beam and the other close to the free end of the cantilever rod. Both ends of the leaf protection rod shaft are rotatably connected to the cantilever rod. Two oppositely arranged leaf protection rod drive cylinders are fixedly installed on the inner side of one cantilever rod. The free ends of the extension rods of the leaf protection rod drive cylinders are connected to the leaf protection rod shafts through a swing arm. Under the action of the leaf protection rod drive cylinders, the two leaf protection rod shafts and the leaf protection rods swing relative to each other. The first drive mechanism is the leaf protection rod drive cylinder.

5. The servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves according to claim 4, characterized in that: A limiting plate is fixedly installed on the inner side of the cantilever rod and sleeved on the leaf guard rod shaft. The limiting plate is provided with two protruding pins. One end of the swing arm is fixed on the leaf guard rod shaft, and the other end of the swing arm is hinged to the free end of the telescopic rod of the leaf guard rod drive cylinder. The two protruding pins are located on both sides of the swing arm to limit its swing angle.

6. The servo-controlled negative pressure suction cup type layered loading and unloading device for pre-cured tobacco leaves according to claim 5, characterized in that: The negative pressure mechanism includes a blower installed in the lower part of the machine body, a main air duct connected to the inlet of the blower, and an air outlet connected to the outlet of the blower. A side air pipe is connected to the main air duct. A main air duct butterfly valve is provided at the inlet of the main air duct, and a side air duct butterfly valve is provided at the inlet of the side air pipe. The inlet of the main air duct is connected to the suction cup air outlet.

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