Tobacco leaf feeding method and feeding equipment

Abstract

The invention relates to the technical field of material movement, in particular to a tobacco leaf feeding method and feeding equipment. A tobacco leaf feeding method comprises the steps that a controller is used for controlling a material table used for containing tobacco leaves to ascend, a detection probe is arranged on the material table to detect the height of the tobacco leaves, a tobacco leaf height signal detected by the detection probe is transmitted to the controller, and meanwhile after the controller receives position information that a chuck is located at a specific position, the tobacco leaves are fed to the material table. The controller controls the material table to ascend to the height at which the clamping head can grab tobacco leaves, then controls the gripper to grab the tobacco leaves on the material table, and transfers the tobacco leaves to another station through the gripper. The detection probe is arranged to detect the height of tobacco leaves on the material table, the position of the chuck is detected, and the information is transmitted to the controller, so that the problem that in the prior art, a conveyor belt is adopted for feeding the tobacco leaves, and the feeding efficiency is high is solved. And the tobacco leaves are not synchronous with a subsequent transfer mechanism due to the fact that the tobacco leaves are difficult to uniformly spread on the conveyor belt.

Description

Technical Field

[0001] The present invention relates to the technical field of material movement, and particularly to a method and equipment for feeding tobacco leaves. Background Art

[0002] In the processing and manufacturing of tobacco leaves, the feeding operation of tobacco leaves is a key link to ensure production continuity, improve efficiency, and guarantee product quality. Especially in an automated system, the refined design of the feeding operation is directly related to the stability and consistency of subsequent processes (such as rewetting, cutting, baking, etc.).

[0003] In the prior art, there are two types: manual feeding and automatic feeding. Manual feeding has low requirements for equipment, but this undoubtedly increases the labor intensity of workers. Therefore, automatic feeding has gradually become the mainstream. In the prior art, for automatic feeding, suction cups are often used to suck tobacco leaves for material transfer. For example, a Chinese patent application for invention with a publication date of January 21, 2025 and a publication number of CN119330073A discloses an automatic grasping and feeding device for tobacco leaf re-drying. The device includes a suction cup for grasping and transferring tobacco leaves. The suction cup can move up and down reciprocally and adsorb on the surface of the tobacco leaves. The tobacco leaves are adsorbed on the suction cup by vacuum suction and transferred along with the movement of the device. In order to facilitate feeding, a conveyor belt is also provided, and the tobacco leaves are sent below the suction cup through the conveyor belt. During the production process, tobacco leaves need to be continuously supplied, and the distribution of tobacco leaves on the conveyor belt may not be uniform. Then, if the conveyor belt runs at a constant speed, some tobacco leaves may be conveyed downstream before they can be transferred in time, or there may be a lack of tobacco leaves on the conveyor belt when the suction cup needs to grasp. Summary of the Invention

[0004] In view of this, the present invention provides a method for feeding tobacco leaves to solve the problem in the prior art that when using a conveyor belt to feed tobacco leaves, it is difficult for the tobacco leaves to be evenly spread on the conveyor belt, resulting in being out of sync with the subsequent transfer mechanism. The present invention also lies in providing a device for feeding tobacco leaves to solve the above technical problems.

[0005] A method for feeding tobacco leaves uses a controller to control the lifting of a material table for holding tobacco leaves. The height of the tobacco leaves is detected by a detection probe arranged on the material table that can detect the stacking height of the tobacco leaves on the material table, and the tobacco leaf height signal detected by the detection probe is transmitted to the controller. At the same time, after the controller receives the position information that the chuck is in a specific position, the controller controls the material table to rise to a height that the chuck can grasp, and then controls the gripper to grasp the tobacco leaves on the material table, and the gripper transfers the tobacco leaves to another station.

[0006] Further, a detection unit for detecting the position of the chuck is provided at the initial position of the moving stroke of the chuck. When the detection unit detects that the chuck is at the initial position of the moving stroke, the position information of the chuck is sent to the controller.

[0007] The beneficial effects of the tobacco leaf feeding method in the present invention are as follows: In the present invention, by providing a liftable material table, it is convenient to place the tobacco leaves on the material table, and the tobacco leaves are fed as the material table rises. The chuck is convenient for grasping the tobacco leaves. In order to make the positions of the chuck and the tobacco leaves correspond and the chuck can grasp the tobacco leaves during operation, a detection probe is provided to detect the height of the tobacco leaves on the material table, that is, to detect the position of the tobacco leaves. By detecting the position of the chuck and transmitting the above information to the controller, the controller can grasp the tobacco leaves on the material table. By detecting the positions of the chuck and the tobacco leaves, the interference between the chuck and the tobacco leaves and the problem that the chuck cannot grasp due to the non-arrival of the tobacco leaves can be effectively avoided, and stable tobacco leaf supply can be carried out according to the action frequency of the chuck, thus solving the problem in the prior art that a conveyor belt is used to feed the tobacco leaves, and due to the difficulty of evenly spreading the tobacco leaves on the conveyor belt, it is out of sync with the subsequent transfer mechanism.

[0008] A tobacco leaf feeding device includes a frame and a transfer mechanism provided on the frame for transferring tobacco leaves. The transfer mechanism includes a chuck for grasping the tobacco leaves and a moving unit for controlling the transfer of the chuck between different work positions. A material table that can move up and down relative to the frame is further provided on the frame. The tobacco leaf feeding device also includes a detection unit for detecting the position of the chuck, a detection probe for detecting the height of the stacked tobacco leaves on the material table, and a controller for controlling the height of the material table. The controller is used to receive the signals from the detection unit and the detection probe to control the material table to rise to a height at which the chuck can grasp the tobacco leaves after the chuck is in a specific position.

[0009] Further, the material table is guidingly arranged on the frame. A third driving mechanism for driving the material table to move up and down is provided on the frame. A guide rod penetrating through the frame is also fixedly provided on the material table.

[0010] Further, the chuck includes a needle for piercing the tobacco leaves to be transferred and a first driving mechanism for driving the needle to move telescopically. The chuck also includes a baffle plate that is relatively fixed to the housing of the first driving mechanism and arranged at intervals. The baffle plate is arranged perpendicular to the moving direction of the needle. During the moving stroke of the needle, there are an extended state in which the needle moves towards the baffle plate or passes through the baffle plate and a retracted state in which the needle moves towards the housing of the first driving mechanism.

[0011] Further, a stripping plate is disposed between the housing of the first driving mechanism and the material baffle, and is arranged in parallel and spaced apart from the material baffle. When the needle is in the extended state, it passes through the stripping plate, and when the needle is in the retracted state, it returns between the stripping plate and the housing of the first driving mechanism. A first avoidance structure for avoiding the needle is provided on the stripping plate.

[0012] Further, a second avoidance structure for avoiding the needle is provided on the material baffle. Both the first avoidance structure and the second avoidance structure are U-shaped cavities.

[0013] Further, the chuck further includes a first base, the first driving mechanism is fixed on the first base, and an installation bracket for installing the first base is provided on the moving unit.

[0014] Further, an arc-shaped groove and a first installation hole located at the center of the arc of the arc-shaped groove are provided on the installation bracket. The first base is provided with a second installation hole and a third installation hole, and the distance between the second installation hole and the third installation hole is the same as the distance between the first installation hole and the arc-shaped groove, so that the first base has different installation positions relative to the installation bracket.

[0015] Further, the moving unit further includes a second driving mechanism provided on the installation bracket for controlling the lifting movement of the installation bracket.

[0016] The beneficial effects of the tobacco leaf feeding device in the present invention are as follows: In the present invention, by providing a transfer mechanism, it is convenient to transfer tobacco leaves between different workstations; by providing a chuck, it is convenient to clamp the tobacco leaves; by providing a moving unit, it is convenient to transfer the tobacco leaves between different workstations; by providing a material table, it is convenient to place the tobacco leaves. Since the material table can perform lifting movement, it can send the tobacco leaves to a specific height for convenient clamping by the chuck. In order to make the positions of the chuck and the tobacco leaves correspond and the chuck can clamp the tobacco leaves when working, a detection probe is provided to detect the height of the tobacco leaves on the material table, that is, to detect the position of the tobacco leaves. By detecting the position of the chuck and transmitting the above information to the controller, the controller can grab the tobacco leaves on the material table. By detecting the positions of the chuck and the tobacco leaves, it can effectively avoid the interference between the chuck and the tobacco leaves and the problem that the chuck cannot clamp the tobacco leaves due to the tobacco leaves not being in place, and can stably supply the tobacco leaves according to the action frequency of the chuck, thereby solving the problem in the prior art that a conveyor belt is used to feed the tobacco leaves, and since it is difficult to evenly spread the tobacco leaves on the conveyor belt, it is out of sync with the subsequent transfer mechanism. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 The front view of the embodiment of the tobacco leaf feeding device in the present invention;

[0019] Figure 2 The schematic diagram of the cooperation between the material table and the chuck of the tobacco leaf feeding device in the present invention;

[0020] Figure 3 The schematic structural diagram of the material table of the tobacco leaf feeding device in the present invention;

[0021] Figure 4 The schematic structural diagram of the chuck of the tobacco leaf feeding device in the present invention;

[0022] Figure 5 The front view of the chuck of the tobacco leaf feeding device in the present invention.

[0023] The meanings of the reference numerals in the figure are as follows: 11, gantry frame; 12, cross bar; 13, base; 2, moving unit; 21, moving block; 22, second driving mechanism; 23, second base; 24, mounting bracket; 241, arc groove; 3, chuck; 31, first base; 311, second mounting hole; 312, third mounting hole; 32, first driving mechanism; 33, needle head; 34, blanking plate; 35, baffle plate; 4, material table; 41, third driving mechanism; 42, guide rod; 43, column; 44, elastic sheet; 45, detection probe mounting bracket. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0025] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit this disclosure. The singular forms "a", "the" and "said" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0028] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or it may be the communication inside two elements. It may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the subsequent description, the suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of describing the present invention, and they do not have a specific meaning by themselves. Therefore, "module" and "component" can be used interchangeably.

[0030] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the drawings.

[0031] In the embodiment of the tobacco leaf feeding device of the present invention:

[0032] As Figure 1 shown, in this embodiment, the tobacco leaf feeding device includes a frame and a transfer mechanism arranged on the frame for transferring tobacco leaves. The transfer mechanism includes a chuck 3 for clamping tobacco leaves and a moving unit 2 for controlling the transfer of the chuck 3 between different workstations. A needle 33 for piercing and fixing the tobacco leaves is arranged on the chuck 3. After the tobacco leaves are fixed by the chuck 3, the moving unit 2 is used to move the chuck 3 to synchronously transfer the tobacco leaves on the chuck 3 to other workstations.

[0033] Specifically, as Figure 4 and Figure 5As shown, the chuck 3 includes a needle 33 for puncturing the tobacco leaves to be transferred and a first driving mechanism 32 for driving the needle 33 to move telescopically. The first driving mechanism 32 can drive the needle 33 to move telescopically. When extended, it can pierce the main vein of the tobacco leaf, thus facilitating the fixation of the tobacco leaf by the chuck 3. The needle 33 is composed of the sharp parts of multiple needles arranged in parallel at intervals. The first driving mechanism 32 is an electric push rod in this embodiment. When puncturing the tobacco leaf, if the needle 33 is not sharp enough or the tobacco leaf is relatively dry, it may not be able to penetrate directly. Therefore, a material blocking plate 35 fixedly arranged relative to the housing of the first driving mechanism 32 is also provided. The material blocking plate 35 is perpendicular to the movement direction of the needle 33. During the extension of the needle 33, if the tobacco leaf is not penetrated directly, the tobacco leaf will abut against the material blocking plate 35, facilitating the penetration of the needle 33. Correspondingly, during the movement stroke of the needle 33, there are an extended state of moving towards the material blocking plate 35 or passing through the material blocking plate 35 and a retracted state of moving towards the housing of the first driving mechanism 32. Of course, in other embodiments, the first driving mechanism can also be a cylinder or a hydraulic cylinder.

[0034] After the needle 33 punctures the tobacco leaf, that is, the clamping of the tobacco leaf is completed. The moving unit 2 can control the chuck 3 to move to a specific station. After that, the chuck 3 needs to release the tobacco leaf so that the tobacco leaf falls on another station. If the main vein of the tobacco leaf is tightly combined with the needle 33, the tobacco leaf may move together with the needle 33 during the retraction of the needle 33. Therefore, a material discharging plate 34 arranged in parallel at intervals with the material blocking plate 35 is also provided between the housing of the first driving mechanism 32 and the material blocking plate 35. During the retraction of the needle 33, the tobacco leaf will abut against the material discharging plate 34 and will not move with the retraction of the needle 33, facilitating the detachment of the tobacco leaf from the needle 33. Of course, in other embodiments, if the needle can retract all the way into the housing of the first driving mechanism, the housing of the first driving mechanism can also play the role of material blocking, and at this time, there is no need to additionally provide a material blocking plate.

[0035] During the movement of the needle 33, it will inevitably pass through the material discharging plate 34. Therefore, a first avoidance structure for avoiding the needle 33 is provided on the material discharging plate 34. In addition, a second avoidance structure for avoiding the needle 33 is also provided on the material blocking plate 35 to prevent the needle 33 from abutting against the plate surface during movement, which may cause the needle 33 to be broken or other damages. Since the needle 33 is composed of multiple needles, it has a certain coverage area. Both the first avoidance structure and the second avoidance structure are U-shaped cavities for the needle 33 to pass through.

[0036] To facilitate the movement of the chuck 3 between different workstations, a moving unit 2 is also provided on the frame. The frame includes a base 13 at the bottom and a gantry frame 11 located above the base 13. A cross bar 12 is provided on the gantry frame 11, and the moving unit 2 is arranged on the cross bar 12. The moving unit 2 includes a moving block 21 that is guided and movably arranged on the cross bar 12. The moving block 21 moves along the guidance of the cross bar 12 and can span different workstations, thereby realizing the transfer of tobacco leaves. A second base 23 is fixedly arranged on the moving block 21, and a second driving mechanism 22 is fixedly arranged on the second base 23. In this embodiment, the second driving mechanism 22 is a cylinder, which has a housing and a telescopic rod. The housing of the second driving mechanism 22 is fixedly arranged on the second base 23, and an installation bracket 24 for installing the chuck 3 is fixedly arranged at the end of the telescopic rod. The telescopic rod of the second driving mechanism 22 is vertically arranged, so that when the telescopic rod extends and retracts, it can drive the installation bracket 24 to move up and down, thereby driving the chuck 3 to move up and down. Of course, in other embodiments, the second driving mechanism can also be other forms such as an electric push rod or a hydraulic cylinder, or the second driving mechanism can be no longer provided. Correspondingly, the installation bracket can also be no longer provided, and the chuck can be directly fixedly arranged on the second base. Of course, at this time, the chuck only has translational movement and can no longer be lifted and lowered.

[0037] For tobacco leaves of different batches, and their shapes may not be the same. When clamping the tobacco leaves, the main vein of the tobacco leaves may be curled. In order to better clamp, the installation angle of the chuck 3 needs to be adjusted. The installation bracket 24 has two parallel and spaced-apart installation plates. Each installation plate is provided with an arc-shaped groove 241 and a first installation hole located at the center of the arc-shaped groove 241. Correspondingly, a clamping plate for being arranged outside the two installation plates is provided on the first base 31. Second installation holes 311 and third installation holes 312 are respectively arranged on the two clamping plates of the first base 31. The distance between the second installation hole 311 and the third installation hole 312 is the same as the distance between the first installation hole and the arc-shaped groove 241. During installation, the first installation hole and the second installation hole 311 are aligned and fixed with bolts, and the third installation hole 312 corresponds to the arc-shaped groove 241 on the installation bracket 24 and is fixed with bolts. Fixing the third installation hole 312 at different positions on the arc-shaped groove 241 can change the installation angle of the chuck 3. Of course, if the quality and shape of the tobacco leaves are relatively constant, the arc-shaped groove can also be no longer provided, but the first base can be directly fixedly arranged on the installation bracket.

[0038] Such as Figure 2 and Figure 3As shown, in order to transport tobacco leaves, a material table 4 for feeding is further provided on the frame. The material table 4 is arranged below the chuck 3, and the chuck 3 transfers the tobacco leaves on the material table 4 to the next working station. The material table 4 is guidingly arranged on the base 13 of the frame. Specifically, the material table 4 includes a flat tabletop for placing tobacco leaves, and a third driving mechanism 41 for driving the material table 4 to lift is arranged below the tabletop. The third driving mechanism 41 is a cylinder, and the telescopic rod of the third mechanism is fixedly connected to the material table 4. The lifting movement of the third driving mechanism 41 can drive the material table 4 to lift. In order to be more stable during the movement, guide rods 42 penetrating through the base 13 are fixedly arranged below the material table 4. There are two guide rods 42, which are respectively arranged on both sides of the third driving mechanism 41. Thus, the movement is kept stable. Of course, in other embodiments, if the third driving mechanism 41 itself is already stable and the connection between the telescopic rod of the third driving mechanism 41 and the material table 4 is relatively stable, the guide rods 42 may not be provided anymore. It should be noted that the material table 4 described in this embodiment being below the chuck 3 does not mean directly below it, but is a description of the height. Since the chuck 3 can move along with the moving block 21, the material table 4 will be directly below the chuck 3 only when picking up the tobacco leaves.

[0039] During the feeding process, as the tobacco leaves are picked up, the number of tobacco leaves on the material table 4 gradually decreases, and its height also decreases accordingly. In order to ensure that the chuck 3 can exactly clamp the tobacco leaves, the material table 4 is set to be liftable, and its rising height can be controlled by the controller. During feeding, the number of tobacco leaves on the material table 4 gradually decreases, and the controller controls the material table 4 to gradually rise, that is, the material table 4 is in an intermittent rising state, and the chuck 3 is in a reciprocating motion. Interference and collision with the tobacco leaves should also be avoided during the movement. Therefore, not only the material table 4 needs to be precisely controlled, but also the chuck 3 needs to be detected and controlled.

[0040] Specifically, the chuck makes a reciprocating motion, and it has a clamping station for clamping above the tobacco leaves and a feeding station for clamping the tobacco leaves and sending them to the next working station. The lifting of the material table 4 is carried out when the chuck 3 is in the feeding station. In order to accurately know the position of the chuck 3, especially when it is in the clamping station, a detection unit is further provided in the clamping operation. In this embodiment, the detection switch is a proximity sensor, and the proximity sensor can detect the approach of the chuck 3 and send out a signal. The controller can receive the signal sent by the proximity sensor and make a move.

[0041] On the other hand, the stroke of the up-and-down movement of the chuck 3 is limited. By raising and lowering the material table 4, the tobacco leaves on the material table 4 can be sent below the chuck 3, facilitating the direct clamping of the chuck 3. Naturally, the rising height of the material table 4 needs to match the height of the chuck 3. In this embodiment, a column 43 is further provided on one side of the material table 4, and a spring piece 44 is provided at the top of the column 43. The spring piece 44 can press the tobacco leaves tightly during the rising process of the material table 4 to prevent the tobacco leaves from falling off the material table 4. In addition, a detection probe mounting bracket 45 is further provided on the side of the material table 4, and a height sensor for detecting the height of the tobacco leaves is provided on the detection probe mounting bracket 45. In this embodiment, the height sensor is an optoelectronic probe. Through the setting of the optoelectronic probe, the height of the tobacco leaves can be known in real time. The device is also provided with a controller for controlling the lifting height of the third driving mechanism 41. The optoelectronic probe can send the detected data to the controller, and the controller controls the third driving mechanism 41 to rise to a specific height convenient for the chuck 3 to clamp.

[0042] During the entire feeding process, first, the tobacco leaves are placed on the material table 4. The detection probe detects the height of the tobacco leaves and the controller controls the material table 4 to rise to an appropriate height. Then, the second driving mechanism 22 controls the chuck 3 to descend to contact the tobacco leaves, and the first driving mechanism 32 controls the needle 33 to extend and pierce the main vein of the tobacco leaves. Then, the moving block 21 moves relative to the cross bar 12, drives the chuck 3 and drives the tobacco leaves to the next station. The chuck 3 opens, correspondingly realizing the transfer of the tobacco leaves at different stations. Finally, the second driving mechanism 22 controls the chuck 3 to rise, and under the control of the moving block 21, it moves back above the tobacco leaves again. Then, the detection unit is triggered, and the detection unit sends a signal to the controller. The controller then judges whether it is necessary to raise the material table 4 and the rising height according to the height of the tobacco leaves detected by the detection probe. Then, the chuck 3 descends to grab, and then the next cycle is carried out.

[0043] In the embodiment of the tobacco leaf feeding method of the present invention: In this embodiment, the tobacco leaf feeding method is consistent with the control method of the tobacco leaf feeding device, and will not be repeated here.

[0044] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

Claims

1. A method for feeding tobacco leaves, characterized in that: Use a controller to control the lifting of the material platform for holding tobacco leaves. Detect the height of the tobacco leaves by setting a detection probe on the material platform that can detect the stacking height of the tobacco leaves on the material platform. Transmit the tobacco leaf height signal detected by the detection probe to the controller. At the same time, after the controller receives the position information that the chuck is in a specific position, the controller controls the material platform to rise to a height that the chuck can grasp, and then controls the gripper to grasp the tobacco leaves on the material platform, and the gripper transfers the tobacco leaves to another station.

2. The tobacco leaf feeding method according to claim 1, characterized in that: A detection unit for detecting the position of the chuck is provided at the initial position of the moving stroke of the chuck. When the detection unit detects that the chuck is at the initial position of the moving stroke, it sends the position information of the chuck to the controller.

3. A tobacco leaf feeding device, comprising a frame and a transfer mechanism arranged on the frame for transferring tobacco leaves. The transfer mechanism includes a chuck for clamping the tobacco leaves and a moving unit for controlling the transfer of the chuck between different workstations. A material table capable of lifting relative to the frame is further arranged on the frame, and it is characterized in that: The tobacco leaf feeding device further includes a detection unit for detecting the position of the chuck, a detection probe for detecting the stacking height of the tobacco leaves on the material platform, and a controller for controlling the height of the material platform. The controller is used to receive the signals from the detection unit and the detection probe to control the material platform to rise to a height that the chuck can clamp after the chuck is in a specific position.

4. The tobacco leaf feeding device according to claim 3, characterized in that: The material platform is guidingly arranged on the frame. A third driving mechanism for driving the lifting of the material platform is arranged on the frame. A guiding rod penetrating through the frame is also fixedly arranged on the material platform.

5. The tobacco leaf feeding device according to claim 3 or 4, characterized in that: The chuck includes a needle for puncturing the tobacco leaves to be transferred and a first driving mechanism for driving the telescopic movement of the needle. The chuck further includes a baffle plate that is relatively fixed and spaced apart from the housing of the first driving mechanism. The baffle plate is arranged perpendicular to the moving direction of the needle. In the moving stroke of the needle, there are an extended state of moving towards the baffle plate or passing through the baffle plate and a retracted state of moving towards the housing of the first driving mechanism.

6. The tobacco leaf feeding device according to claim 5, wherein: A stripping plate that is parallel and spaced apart from the baffle plate is further arranged between the housing of the first driving mechanism and the baffle plate. When the needle is in the extended state, it passes through the stripping plate. When the needle is in the retracted state, it returns between the stripping plate and the housing of the first driving mechanism. The first avoidance structure for avoiding the needle is arranged on the stripping plate.

7. The tobacco leaf feeding device according to claim 6, characterized in that: The second avoidance structure for avoiding the needle is arranged on the baffle plate. Both the first avoidance structure and the second avoidance structure are U-shaped cavities.

8. The tobacco leaf feeding device according to claim 5, characterized in that: The chuck further includes a first base. The first driving mechanism is fixed on the first base. An installation bracket for installing the first base is arranged on the moving unit.

9. The tobacco leaf feeding device according to claim 8, characterized in that: An arc-shaped groove and a first installation hole located at the center of the circle of the arc-shaped groove are arranged on the installation bracket. The first base is provided with a second installation hole and a third installation hole, and the distance between the second installation hole and the third installation hole is the same as the distance between the first installation hole and the arc-shaped groove, so that the first base has different installation positions relative to the installation bracket.

10. The tobacco leaf feeding device according to claim 8, wherein: The moving unit further includes a second driving mechanism arranged on the installation bracket for controlling the lifting movement of the installation bracket.

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