Leaf removing mechanism and leaf picking device

Abstract

A lead screw pair is installed on a fixed seat, a lead screw of the lead screw pair vertically extends downwards, an installation part is connected with a nut of the lead screw pair, slide carriages are installed on the two outer side walls of the fixed seat, on a forward projection plane, the bottom of the lead screw is located below the slide carriages, and the bottom of the lead screw is located below the slide carriages. A wedge-shaped face expanding outwards is arranged on the inner side of the bottom of the slide carriage, a rotatable ball is arranged at the end, close to the slide carriage, of the leaf picking handle and can slide along the inner side of the corresponding slide carriage, the limiting part is located below the slide carriage, and the top of the limiting part abuts against the bottom of the slide carriage under the action of the extension spring. The leaf removing mechanism has the advantages that the leaf removing mechanism can move up and down through the lead screw pair, leaves can be picked in the descending process of the leaf removing mechanism, the leaf removing handle can move relative to the leaf picking handle in the ascending resetting process of the leaf removing mechanism, leaf removing of the leaves is achieved, leaf removing is convenient, and the leaf removing efficiency is improved. Therefore, the leaf picking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to mulberry leaf picking, in particular to a leaf removing mechanism and a leaf picking device. Background Art

[0002] China is a major exporter of sericulture products worldwide, with a long history and culture. The sericulture industry has experienced rapid development in recent years. Mulberry leaves, a key raw material for the industry, are a key cash crop in my country due to their rich medicinal value, antioxidant properties, and anti-aging properties. However, mechanized harvesting is currently a bottleneck for the industry.

[0003] Currently, there is little research on mulberry leaf harvesters. A stem-leaf separator suitable for mulberry branches has been designed abroad. Domestically, an automatic reciprocating, rocker-type mulberry leaf picking machine with a positioning device has been proposed, such as the Chinese invention patent: A mulberry leaf picking device (publication number: CN116210455A). This device uses a harvesting component to pick mulberry leaves. However, during harvesting, the harvesting component moves from bottom to top to cut the petioles of the mulberry leaves, leaving no restrictions on the branches, which makes it easy to break the mulberry branches when harvesting the leaves. Another example is the Chinese invention patent: A negative pressure automatic mulberry leaf picking machine (publication number: CN114793624A). The mulberry leaf picking device connected to the screw achieves free movement in both horizontal and vertical directions. The scraper combined with the comb teeth can pick the plane within the entire stroke. During the picking process, the mulberry leaves that fall off are immediately collected by the hose connected to the scraper due to gravity and suction, and are collected at the discharge port of the negative pressure blower, and then fall into the traction trolley.

[0004] Therefore, the existing mulberry leaf picking equipment is difficult to remove the mulberry leaves after picking them, and requires manual cleaning, which in turn affects the picking efficiency of the mulberry leaves. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a leaf removing mechanism and a leaf picking device.

[0006] The purpose of the utility model is achieved through the following technical solutions: a leaf removing mechanism, comprising a mounting part and a limiting part, leaf picking petioles are mounted in pairs on the mounting part, and the two leaf picking petioles can rotate relative to the mounting part, a first notch is provided on the inner side of the leaf picking petioles, and a reset spring is also provided between the two leaf picking petioles, leaf stripping petioles are mounted in pairs on the limiting part, and the two leaf stripping petioles can rotate relative to the mounting part, a second notch is provided on the inner side of the leaf stripping petioles, a plurality of columns are mounted on the top of the leaf picking petioles, the columns are connected to one end of the tension spring, and the other end of the tension spring is connected to the corresponding leaf stripping petiole, a plurality of needle rods are mounted on the leaf picking petiole, and the needle rods extend axially downward and pass through the leaf stripping petioles.

[0007] Optionally, the leaf stripping petiole is a semicircular structure, the arc-shaped inner wall of the leaf stripping petiole is a second notch, and an annular blade extending axially downward is provided on the inner wall of the second notch. When the top of the leaf stripping petiole abuts the top of the leaf picking petiole, on the forward projection surface, the bottom of the annular blade is located above the needle rod.

[0008] Optionally, a convex column is provided on the top of the leaf picking stalk, and both ends of the return spring are respectively installed on the corresponding convex columns.

[0009] Optionally, a second mounting groove is provided on the mounting portion, and the leaf picking stalk is rotatably mounted in the second mounting groove via a rotating shaft.

[0010] Optionally, a third mounting groove is provided on the limiting portion, and the end of the petiole can be rotatably mounted in the third mounting groove via a rotating shaft.

[0011] Optionally, the petiole is a semicircular structure, the arc-shaped inner wall of the petiole is the first notch, and the needle rods are distributed at equal intervals on the same circumference.

[0012] Optionally, two upright posts are provided on the top of the leaf picking petiole, and the upright posts are distributed at both ends of the leaf picking petiole.

[0013] A leaf-picking device includes a leaf-removing mechanism and a fixed seat, a screw pair is installed on the fixed seat, the screw of the screw pair extends vertically downward, the mounting portion is connected to the nut of the screw pair, and slides are installed on the two outer side walls of the fixed seat. On the positive projection surface, the bottom of the screw is located below the slide, and the inner side of the bottom of the slide is provided with an outward-extending wedge surface. A rotatable ball is provided at the end of the leaf-picking handle close to the slide, and the ball can slide along the inner side of the corresponding slide. The limiting portion is located below the slide, and when the two leaf-picking handles are in the open state, the top of the limiting portion abuts against the bottom of the slide under the action of the tension spring.

[0014] Optionally, a step is provided at the end of the rotating end of the leaf picking handle, and the ball is rotatably mounted on the step via a rotating shaft.

[0015] Optionally, a subsidence step is provided on the outer side of the top of the petiole, the needle rod is distributed on the subsidence step, and the top of the needle rod passes through the subsidence step.

[0016] The utility model has the following advantages:

[0017] 1. The defoliation mechanism of the present invention realizes defoliation of leaves by enabling the defoliation petiole to slide to the bottom of the needle rod through the relative movement of the defoliation petiole and the picking petiole;

[0018] 2. The leaf-picking device of the present invention can move the leaf-picking mechanism up and down through the screw pair, and can pick the leaves during the downward movement of the leaf-picking mechanism. Moreover, during the upward resetting process of the leaf-picking mechanism, the leaf-picking stalk can move relative to the leaf-picking stalk to remove the leaves, thereby facilitating leaf-picking and improving the efficiency of leaf picking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0021] Figure 3 for Figure 2 Schematic cross-sectional view of the middle BB;

[0022] Figure 4 for Figure 2 Schematic cross-sectional view of CC;

[0023] Figure 5 for Figure 2 Schematic cross-sectional view of the middle DD;

[0024] Figure 6 Schematic diagram of the structure of the defoliation mechanism;

[0025] In the figure, 11-petiole picking, 12-needle rod, 13-petiole removing, 14-annular blade, 15-column, 16-tension spring, 17-limiting part, 24-fixed seat, 25-slide, 26-drive motor, 27-nut, 28-screw, 29-reset spring, 33-ball. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Example

[0032] like Figure 6 As shown, a leaf removal mechanism includes a mounting portion and a limiting portion 17, on which leaf picking handles 11 are mounted in pairs, and the two leaf picking handles 11 can rotate relative to the mounting portion. In this embodiment, as shown in FIG. Figure 2As shown, a second mounting groove is provided on the mounting portion, and the leaf-picking petiole 11 is rotatably mounted in the second mounting groove through a rotating shaft. A first notch is provided on the inner side of the leaf-picking petiole 11. When the two leaf-picking petioles 11 are brought close together, the two first notches form a through-hole for the branches to pass through. Furthermore, a reset spring 29 is provided between the two leaf-picking petioles 11. The two leaf-picking petioles 11 are in a close state under the action of the reset spring 29. Leaf-removing petioles 13 are installed in pairs on the limiting portion 17, and the two leaf-removing petioles 13 can rotate relative to the mounting portion. The inner side of the leaf-removing petiole 13 is opened. A second notch is provided, and the two second notches also form a through-hole for the branches to pass through. A plurality of columns 15 are installed on the top of the petiole 11, and one end of the tension spring 16 is connected to the column 15. The other end of the tension spring 16 is connected to the corresponding petiole 13. A plurality of needle rods 12 are installed on the petiole 11. The needle rod 12 extends axially downward and passes through the petiole 13, so that the petiole 13 can only move along the extension direction of the needle rod 12. The tension spring 16 is in a stretched state. Without being affected by other external forces, the petiole 13 is under the action of the tension spring 16. It is always in contact with the leaf picking stalk 11. When in use, the two leaf picking stalks 11 are opened, and then the branches are placed in the perforations. Then, external force is applied to the leaf removing mechanism so that the leaf removing mechanism moves from top to bottom along the branches. During the movement, the leaves are stuck between two adjacent needle rods 12, and several needle rods 12 form comb teeth. During the downward movement, the petioles of the leaves are torn off from the branches, and the picked leaves are stacked between the comb teeth, which is not easy to cause damage to the leaves. Furthermore, the leaf picking stalk 11 is a semicircular structure. The arc-shaped inner wall of 11 is the first notch, and the needle rods 12 are distributed at equal intervals on the same circumference, so that the needle rods 12 are evenly distributed, which is convenient for adjusting the appropriate spacing for different leaves. After the leaves are picked, a downward pulling force is applied to the leaf stripping petiole 13, and the leaf stripping petiole 13 moves downward along the needle rod 12, thereby driving the leaves to move downward. When the bottom of the leaf stripping petiole 13 is flush with the bottom of the needle rod 12, the leaf stripping is completed, and then the leaf stripping petiole 13 is released. The leaf stripping petiole 13 moves upward under the tension of the tension spring 16, and finally abuts against the leaf picking petiole 11.

[0033] In this embodiment, if Figure 6As shown, since the leaves all grow sideways, the leaf-picking petiole 11 can tear the petioles of the leaves off the branches when moving from top to bottom, but a small number of leaves cannot be broken off. In order to improve the collection rate of leaves, in this embodiment, the leaf-removing petiole 13 is a semicircular structure, and the arc-shaped inner wall of the leaf-removing petiole 13 is a second notch. An annular blade 14 extending axially downward is provided on the inner wall of the second notch. When the top of the leaf-removing petiole 13 abuts the top of the leaf-picking petiole 11, the bottom of the annular blade 14 is located above the needle rod 12 on the forward projection surface. For the leaves that have not been torn off, the end of the petiole close to the leaf blade is stuck between the needle rods 12, and the petiole is in a bent shape. When the annular blade 14 contacts the end of the petiole close to the branch, the annular blade 14 can cut off the petiole, and the cut leaves are still stacked between the needle rods 12.

[0034] In this embodiment, if Figure 6 As shown, a boss is provided on the top of the leaf picking stalk 11 , and both ends of the return spring 29 are respectively mounted on the corresponding bosses, thereby facilitating the installation of the return spring 29 .

[0035] In this embodiment, if Figure 2 As shown, a third mounting groove is provided on the limiting portion 17, and the end of the leaf stripping petiole 13 is rotatably mounted in the third mounting groove through a rotating shaft. Since the leaf stripping petiole 13 is also pierced with a needle rod 12, further, at least two guide rods are installed on the leaf stripping petiole 13 at intervals. The guide rods extend upward and pass through the corresponding leaf stripping petioles 13. The tops of the guide rods are connected by connecting pieces. Therefore, when the leaf picking petiole 11 is opened, the leaf stripping petiole 13 is also opened, and when the leaf picking petioles 11 are closed, the leaf stripping petioles 13 are also closed.

[0036] In this embodiment, if Figure 2 As shown, two upright posts 15 are provided on the top of the leaf-picking petiole 11, and the upright posts 15 are distributed at both ends of the leaf-picking petiole 11, so that the force on the leaf-removing petiole 13 is more uniform, which facilitates the restoration of the leaf-removing petiole 13 after removing the leaves. Example

[0037] like Figure 1 and Figure 2As shown, a leaf picking device includes a leaf removing mechanism and a fixed seat 24. In this embodiment, the leaf picking device also includes a walking mechanism (not shown in the figure). A multi-axis manipulator is provided on the walking mechanism, and the fixed seat 24 of the clamping mechanism is connected to the end of the multi-axis manipulator. The walking mechanism and the multi-axis manipulator are both existing technologies. Preferably, the walking mechanism is a crawler-type walking mechanism, which has good off-road maneuverability and can walk on uneven ground, cross obstacles, climb steps with a small gradient, climb slopes, cross ditches, etc., so it is suitable for walking in mulberry fields. The multi-axis manipulator preferably adopts a four-axis, five-axis or six-axis manipulator, and a screw pair is installed on the fixed seat 24. The screw 28 of the screw pair extends vertically downward. In this embodiment, as shown in FIG. Figure 6 As shown, the leaf removal mechanism includes a mounting portion and a limiting portion 17, the mounting portion is connected to the nut 27 of the screw pair, and the mounting portion is equipped with a pair of leaf picking handles 11, and the two leaf picking handles 11 can rotate relative to the mounting portion. In this embodiment, as shown in FIG. Figure 2 As shown, a second mounting groove is provided on the mounting portion, and the leaf picking stalk 11 is rotatably mounted in the second mounting groove via a rotating shaft. Figure 3 As shown, a first notch is provided on the inner side of the leaf-picking petiole 11. When the two leaf-picking petioles 11 are brought close together, the two first notches form a through-hole for the branches to pass through. Furthermore, a reset spring 29 is provided between the two leaf-picking petioles 11. The two leaf-picking petioles 11 are in a close state under the action of the reset spring 29. The leaf-picking petioles 13 are installed in pairs on the limiting portion 17, and the two leaf-picking petioles 13 can rotate relative to the mounting portion, as shown in FIG. Figure 4 As shown, a second notch is provided on the inner side of the leaf-removing petiole 13, and the two second notches also form a through-hole for the branches to pass through. A plurality of upright posts 15 are installed on the top of the leaf-picking petiole 11, and one end of the tension spring 16 is connected to the upright post 15, and the other end of the tension spring 16 is connected to the corresponding leaf-removing petiole 13. A plurality of needle rods 12 are installed on the leaf-picking petiole 11, and the needle rod 12 extends axially downward and passes through the leaf-removing petiole 13, so that the leaf-removing petiole 13 can only move along the extension direction of the needle rod 12, and the tension spring 16 is in a stretched state. Under the action of no other external force, the leaf-removing petiole 13 is always in contact with the leaf-picking petiole 11 under the action of the tension spring 16. In this embodiment, slides 25 are installed on the two outer side walls of the fixed seat 24. On the forward projection surface, as shown Figure 5As shown, the bottom of the screw 28 is located below the slide 25, and the inner side of the bottom of the slide 25 is provided with a wedge-shaped surface that stretches outward. The end of the leaf picking handle 11 close to the slide 25 is provided with a rotatable ball 33, and the ball 33 can slide along the inner side of the corresponding slide 25. The limiting part 17 is located below the slide 25, and when the two leaf picking handles 11 are in the open state, the top of the limiting part 17 abuts against the bottom of the slide 25 under the action of the tension spring 16. When the ball 33 enters the wedge-shaped surface area, the leaf picking handle 11 gradually closes together under the action of the return spring 29. When the ball 33 leaves the wedge-shaped surface, the two leaf picking handles 11 close together. When in use, the drive motor 26 of the screw pair works to make the leaf picking handle 11 move upward. The upward process of the leaf picking handle 11 The ball 33 enters the wedge-shaped surface area, and the wedge-shaped surface squeezes the ball 33, and the two leaf-picking petioles 11 gradually open. When the ball 33 moves up and down and leaves the wedge-shaped surface area, the ball 33 contacts the inner side of the slide 25, thereby opening the two leaf-picking petioles 11. In the upward process of the leaf-picking petiole 11, the tension spring 16 assembly is stretched. When the ball 33 enters the wedge-shaped surface area, the limiting part 17 abuts against the bottom of the slide 25, and the leaf-picking petiole 13 cannot move upward. The distance between the leaf-picking petiole 13 and the leaf-picking petiole 11 is widened. When the leaf-picking petiole 11 moves to the upper stroke, the bottom of the needle rod 12 is located in the leaf-picking petiole 13, and then the branch is placed in the perforation, and the drive motor 26 rotates in the opposite direction. The leaf-picking petiole 11 first moves When the ball 33 moves downward, since the ball 33 is still between the inner walls of the two slides 25, the leaf picking petiole 11 is still in an open state. When the upper part of the branch is clamped and the leaves are picked downward, the tender leaves on the top will not be picked. During the downward process, when the ball 33 enters the wedge-shaped surface area, the two leaf stripping petioles 13 are assembled together. When the ball 33 leaves the wedge-shaped surface area, the two leaf picking petioles 11 are moved together under the action of the return spring 29, and the leaf stripping petiole 13 is in contact with the leaf picking petiole 11. As the leaf stripping petiole 13 and the leaf picking petiole 11 move from top to bottom along the branch, the petiole is stuck between two adjacent needle rods 12 during the movement, and several needle rods 12 form comb teeth, which tear the petioles of the leaves off the branch during the downward movement. The picked leaves are stacked between the comb teeth, which makes it difficult to damage the leaves. Furthermore, the leaf picking stalk 11 is a semicircular structure, and the arc-shaped inner wall of the leaf picking stalk 11 is the first notch. The needle rods 12 are evenly spaced on the same circumference, so that the needle rods 12 are evenly distributed, which is convenient for adjusting the appropriate spacing for different leaves. When the nut 27 moves to the lower stroke of the screw 28, the leaf picking is completed, and then the multi-axis manipulator moves the defoliation mechanism to the leaf collection area, and then the drive motor 26 drives the nut 27 to move upward along the screw 28. When the ball 33 enters the wedge surface area, the leaf stripping stalk 13 abuts against the slide 25. As the leaf picking stalk 11 moves upward, the distance between the leaf stripping stalk 13 and the leaf picking stalk 11 gradually increases.At this time, the leaves stuck between the needle rods 12 are separated from the needle rods 12 under the action of the leaf stripping stalks 13 and fall into the leaf collection area, completing the leaf stripping.

[0038] In this embodiment, since the leaves all grow sideways, the leaf picking petiole 11 can tear the leaf petioles off the branches when it moves from top to bottom. However, the petioles of a small number of leaves cannot be torn off the branches. In order to improve the collection rate of leaves, in this embodiment, Figure 6 and Figure 4 As shown, the leaf stripping petiole 13 is a semicircular structure, and the arc-shaped inner wall of the leaf stripping petiole 13 is a second notch. An annular blade 14 extending axially downward is provided on the inner wall of the second notch. When the top of the leaf stripping petiole 13 abuts the top of the leaf picking petiole 11, the bottom of the annular blade 14 is located above the needle rod 12 on the positive projection surface. The leaves that have not been torn off, the end of the petiole close to the leaf blade is stuck between the needle rods 12, and the petiole is in a bent shape. When the annular blade 14 contacts the end of the petiole close to the branch, the annular blade 14 can cut off the petiole, and the cut leaves are still stacked between the needle rods 12.

[0039] In this embodiment, if Figure 6 As shown, a boss is provided on the top of the leaf picking stalk 11 , and both ends of the return spring 29 are respectively mounted on the corresponding bosses, thereby facilitating the installation of the return spring 29 .

[0040] In this embodiment, if Figure 2 As shown, a third mounting groove is provided on the limiting portion 17, and the end of the leaf stripping petiole 13 is rotatably mounted in the third mounting groove through a rotating shaft. Since the leaf stripping petiole 13 is also pierced with a needle rod 12, further, at least two guide rods are installed on the leaf stripping petiole 13 at intervals. The guide rods extend upward and pass through the corresponding leaf stripping petioles 13. The tops of the guide rods are connected by connecting pieces. Therefore, when the leaf picking petiole 11 is opened, the leaf stripping petiole 13 is also opened, and when the leaf picking petioles 11 are closed, the leaf stripping petioles 13 are also closed.

[0041] In this embodiment, if Figure 6 As shown, two upright posts 15 are provided on the top of the leaf-picking petiole 11, and the upright posts 15 are distributed at both ends of the leaf-picking petiole 11, so that the force on the leaf-removing petiole 13 is more uniform, which facilitates the restoration of the leaf-removing petiole 13 after removing the leaves.

[0042] In this embodiment, if Figure 6As shown, a step is provided at the end of the rotating end of the leaf picking handle 11, and the ball 33 is rotatably mounted on the step through a rotating shaft. On the horizontal projection plane, part of the ball 33 is located on the outside of the step, thereby ensuring that the ball 33 can roll along the inner side of the slide 25. Of course, in this embodiment, when the two leaf picking handles 11 are in a close state, on the horizontal projection plane, at least half of the ball 33 is covered by the wedge surface. Therefore, when the nut 27 is in the upward process, it can ensure that the ball 33 enters between the two wedge surfaces, and under the guiding action of the wedge surfaces, the distance between the two balls 33 gradually decreases.

[0043] In this embodiment, if Figure 6 As shown, a sinking step is provided on the outer side of the top of the leaf picking stalk 11, and the needle rod 12 is distributed at the sinking step, and the top of the needle rod 12 passes through the sinking step, so that the top of the needle rod 12 is in a leaking state, thereby facilitating the pulling of the needle rod 12. Preferably, the needle rod 12 is made of a steel needle.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A defoliation mechanism, characterized in that: It includes a mounting part and a limiting part, the mounting part is provided with leaf picking petioles in pairs, and the two leaf picking petioles can rotate relative to the mounting part, a first notch is provided on the inner side of the leaf picking petioles, and a reset spring is provided between the two leaf picking petioles, the limiting part is provided with leaf stripping petioles in pairs, and the two leaf stripping petioles can rotate relative to the mounting part, a second notch is provided on the inner side of the leaf stripping petioles, a plurality of columns are provided on the top of the leaf picking petioles, the columns are connected to one end of the tension spring, and the other end of the tension spring is connected to the corresponding leaf stripping petiole, a plurality of needle rods are provided on the leaf picking petiole, and the needle rods extend axially downward and pass through the leaf stripping petioles.

2. A defoliation mechanism according to claim 1, characterized in that: The leaf stripping petiole is a semicircular structure, and the arc-shaped inner wall of the leaf stripping petiole is the second notch. An annular blade extending axially downward is provided on the inner wall of the second notch. When the top of the leaf stripping petiole abuts the top of the leaf picking petiole, on the forward projection surface, the bottom of the annular blade is located above the needle rod.

3. A defoliation mechanism according to claim 1 or 2, characterized in that: A convex column is provided on the top of the leaf picking handle, and the two ends of the return spring are respectively installed on the corresponding convex columns.

4. A defoliation mechanism according to claim 1 or 2, characterized in that: A second mounting groove is provided on the mounting portion, and the leaf picking handle is rotatably mounted in the second mounting groove via a rotating shaft.

5. A defoliation mechanism according to claim 1 or 2, characterized in that: A third mounting groove is provided on the limiting portion, and the end of the leaf removal stalk is rotatably mounted in the third mounting groove via a rotating shaft.

6. A defoliation mechanism according to any one of claims 1 or 2, characterized in that: The leaf picking petiole is a semicircular structure, the arc-shaped inner wall of the leaf picking petiole is the first notch, and the needle rods are distributed on the same circumference at equal intervals.

7. A defoliation mechanism according to claim 1 or 2, characterized in that: Two upright posts are provided on the top of the leaf picking stalk, and the upright posts are distributed at both ends of the leaf picking stalk.

8. A leaf picking device, characterized in that: The leaf removal mechanism includes any one of claims 1 to 7, and further includes a fixed seat, a screw pair is installed on the fixed seat, the screw of the screw pair extends vertically downward, the mounting portion is connected to the nut of the screw pair, and slides are installed on the two outer side walls of the fixed seat, and on the positive projection surface, the bottom of the screw is located below the slide, and the inner side of the bottom of the slide is provided with an outward-expanding wedge surface, and a rotatable ball is provided on the end of the leaf picking handle near the slide, and the ball can slide along the corresponding inner side of the slide, and the limiting portion is located below the slide, and when the two leaf picking handles are in the open state, the top of the limiting portion abuts against the bottom of the slide under the action of the tension spring.

9. The leaf picking device according to claim 8, characterized in that: A step is provided at the end of the rotating end of the leaf picking handle, and the ball is rotatably mounted on the step through a rotating shaft.

10. The leaf picking device according to claim 8, characterized in that: A subsidence step is provided on the outer side of the top of the leaf picking stalk, the needle rod is distributed on the subsidence step, and the top of the needle rod passes through the subsidence step.

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