Grafting device for fruit tree breeding

Abstract

The application discloses a grafting device for fruit tree breeding and relates to the technical field of fruit tree breeding.The grafting device comprises a shell, a radial cutting mechanism is slidably connected in the shell, a clamping mechanism is arranged between the radial cutting mechanism and the shell and is used for clamping and fixing a rootstock or a scion, an axial cutting mechanism is arranged in the shell, an automatic positioning assembly connected with the axial cutting mechanism is arranged on the clamping mechanism, a driving mechanism is arranged on the shell, and a linkage mechanism is connected between the radial cutting mechanism and the axial cutting mechanism.The grafting device can realize automatic centering of branch strips with different diameters and ensure that the incisions are not inclined.The automatic positioning assembly is adaptively positioned to the axis along with the clamping action and accurately limits the radial cutting depth, so that the semicircular incisions are regular and reliable.Meanwhile, the axial cutting mechanism is synchronously positioned along with the positioning assembly, and synchronous linkage of radial and axial cutting is realized through the linkage assembly, so that the L-shaped incisions can be completed through one operation, and the cutting efficiency and incision accuracy are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of fruit tree propagation technology, and in particular to a grafting device for fruit tree propagation. Background Technology

[0002] Grafting is an important method of asexual reproduction in fruit trees. By grafting a scion of a superior variety onto a rootstock with strong resistance, a new plant combining the best traits of both can be obtained. In grafting, the regularity and matching degree of the cut shapes of the rootstock and scion, as well as the cutting efficiency, are key factors determining the grafting survival rate. Among these, the L-shaped cut (i.e., a semi-cylindrical cut) is superior to traditional oblique cuts and cleft grafting cuts, as detailed in the attached diagram. Figure 1 As shown, during grafting, L-shaped cuts 40 are made on both the rootstock 20 and the scion 30. The L-shaped cuts 40 on the rootstock 20 and scion 30 are then joined symmetrically at the center, and a fixing tape is wrapped around the joint. This grafting method offers a larger contact area and better mechanical fit, facilitating the alignment and adhesion of the cambium layers of the rootstock and scion. It significantly promotes callus formation and healing, and therefore has received increasing attention in fruit tree grafting.

[0003] Currently, L-shaped cuts are still primarily made manually. The operator holds a knife in one hand and holds the branch in the other, relying on visual inspection and feel to first make a semi-circular radial cut at the branch end, then a straight axial cut, ultimately forming an L-shaped (semi-cylindrical) cut. This traditional manual method has several insurmountable problems. First, the cutting depth and position depend entirely on the operator's experience and feel. Inconsistency in cut depth and shape is difficult to guarantee between different operators, and even between different operations by the same operator, leading to inaccurate matching of the rootstock and scion cuts, directly affecting grafting adhesion and survival rate. Second, manual cutting requires completing the radial cut first, followed by the axial cut. This step-by-step operation requires two positioning steps, which is highly susceptible to positional deviations due to branch displacement or angle changes, affecting the connection accuracy between the two segments of the L-shaped cut and resulting in an irregular cut shape. Furthermore, for rootstocks or scions of different diameters, it is difficult to accurately control the semi-circular arc of the radial cut to match the branch diameter during manual cutting, resulting in poor cut adaptability. In addition, manual cutting is cumbersome, inefficient, and requires a high level of skill from the operator, making it difficult to standardize and scale up grafting operations. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the cutting of L-shaped incisions in the prior art still relies heavily on manual labor, and to propose a grafting device for fruit tree propagation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a grafting device for fruit tree propagation, comprising a housing, a radial cutting mechanism slidably connected inside the housing, a clamping mechanism provided between the radial cutting mechanism and the housing for clamping and fixing the rootstock or scion, an axial cutting mechanism provided inside the housing, an automatic positioning component connected to the axial cutting mechanism on the clamping mechanism for positioning the axial cutting mechanism and limiting the radial cutting mechanism, a driving mechanism provided on the housing for driving the radial cutting mechanism, and a linkage mechanism connected between the radial cutting mechanism and the axial cutting mechanism for driving the axial cutting mechanism.

[0006] In some embodiments, the radial cutting mechanism includes a push plate and a radial cutting blade. Both the push plate and the radial cutting blade are slidably connected within the housing. The push plate is connected to the drive mechanism, and the radial cutting blade is fixedly connected to the push plate. A positioning notch is provided on the outer side of the radial cutting blade.

[0007] In some embodiments, the clamping mechanism includes a clamping plate slidably connected to the housing, a first V-shaped clamping block fixedly connected to the clamping plate, a second V-shaped clamping block fixedly connected to the housing at a position opposite to the first V-shaped clamping block, and a clamping spring connected between the clamping plate and the push plate.

[0008] In some embodiments, the automatic positioning assembly includes a positioning shaft connected to an axial cutting mechanism, a slider slidably connected to the positioning shaft, a first connecting rod connecting the slider and a clamping plate, and a second connecting rod connecting the slider and the housing.

[0009] In some embodiments, the axial cutting mechanism includes a blade holder fixedly connected to a positioning shaft, an axial cutting blade slidably connected inside the blade holder, the axial cutting blade being connected to a linkage mechanism, and a receiving cavity provided at the lower part of the blade holder to accommodate a positioning notch, for limiting the positioning notch and for accommodating rootstock or scion.

[0010] In some embodiments, the linkage mechanism includes a first hydraulic component and a second hydraulic component. The first hydraulic component is connected between the push plate and the clamping plate, and the second hydraulic component is disposed on the tool holder and used to drive the axial cutting tool. A hydraulic pipe is connected between the second hydraulic component and the first hydraulic component.

[0011] In some embodiments, the first hydraulic assembly includes a first hydraulic cylinder and a first piston rod. The first hydraulic cylinder is fixedly connected to a clamping plate, the first piston rod is fixedly connected to a push plate, and a first piston fixed to the first piston rod is slidably connected inside the first hydraulic cylinder.

[0012] In some embodiments, the second hydraulic assembly includes a second hydraulic cylinder and a second piston rod. The second hydraulic cylinder is fixedly connected to the tool holder, the second piston rod is fixedly connected to the axial cutting tool, and a second piston fixedly connected to the second piston rod is slidably connected inside the second hydraulic cylinder. A return spring is connected between the second piston and the second hydraulic cylinder.

[0013] In some embodiments, hydraulic oil is provided in the first hydraulic cylinder between the first piston and the hydraulic pipe, the second hydraulic cylinder between the second piston and the hydraulic pipe, and the hydraulic pipe.

[0014] In some embodiments, the drive mechanism includes a rack and two symmetrically distributed handles. The rack is slidably connected to the housing and fixedly connected to a push plate. The two handles are rotatably connected to the outside of the housing via a rotating shaft, and each handle is fixedly connected with a gear that meshes with the rack.

[0015] Compared with the prior art, the present invention provides a grafting device for fruit tree propagation, which has the following beneficial effects:

[0016] 1. This invention, by setting a clamping mechanism with two V-shaped clamping blocks, can automatically center rootstocks or scions of different diameters during the clamping process, ensuring that the axis of the branch is always in the predetermined position, while keeping the branch axis perpendicular to the radial cutting mechanism, effectively preventing the radial cut from being skewed, improving the consistency and reliability of the cut quality, and reducing the dependence on the operator's technical level.

[0017] 2. The present invention provides an automatic positioning component on the clamping mechanism. During the clamping process, the automatic positioning component can adaptively move to the axis of the rootstock or scion, i.e. the axial cutting position, to achieve automatic and precise positioning of the cutting position. The automatic positioning component can automatically adjust the positioning position according to the change of the branch diameter, so that the same device can be used for rootstocks or scions of different diameters, which significantly improves the flexibility and applicability of the device.

[0018] 3. This invention uses an automatic positioning component to form a contact limiting cooperation with the radial cutting blade during the radial cutting process. When the radial cutting blade cuts to the positioning notch and contacts the blade holder, the semi-circular radial cut is just completed. This provides precise positioning and limiting for the depth and position of the radial cut, avoiding cut quality defects caused by cutting too deep or too shallow. This results in a regular semi-circular shape and precise size of the radial cut, overcoming the problem of difficulty in controlling the cutting depth in manual cutting.

[0019] 4. By mounting the axial cutting mechanism on the automatic positioning assembly, the axial cutting mechanism moves synchronously to the axial cutting position with the positioning action of the automatic positioning assembly. The axial cutting position is positioned at the same time as the radial cutting positioning is completed, without the need to adjust the position of the axial cutting mechanism separately, thus ensuring the accuracy of the axial cutting position and simplifying the operation steps.

[0020] 5. This invention sets up a synchronous linkage component between the radial cutting mechanism and the axial cutting mechanism. When the driving mechanism drives the radial cutting mechanism to perform radial cutting, the radial cutting mechanism synchronously drives the axial cutting mechanism to cut along the axial direction through the linkage component, realizing the linkage of radial cutting and axial cutting. Cutting in two directions can be completed simultaneously in one operation, eliminating the trouble of back-and-forth adjustment and repositioning in traditional step-by-step cutting, and greatly improving cutting efficiency and the connection accuracy between the two cut sections.

[0021] 6. The present invention has a compact overall structure. The various mechanisms work together to achieve the sequential actions of clamping, positioning, radial cutting and axial cutting. The entire cutting process can be completed by operating the drive mechanism in sequence to clamp, position and cut synchronously. The operation is simple and fast, which is conducive to improving the standardization of grafting operations and the efficiency of large-scale production.

[0022] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0023] Figure 1 A schematic diagram of the L-shaped incision on the rootstock and scion;

[0024] Figure 2 This is a frontal three-dimensional structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of a partial cross-sectional view of the present invention.

[0026] Figure 4 This is a top-view cross-sectional schematic diagram of a partial structure at the axial cutting mechanism of the present invention;

[0027] Figure 5 This is a top-view cross-sectional schematic diagram of a partial structure at the radial cutting mechanism of the present invention;

[0028] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle;

[0029] Figure 7 This is a partial structural schematic diagram of the side cross-section of the present invention;

[0030] Figure 8 This is a side view of the three-dimensional structure of the axial cutting mechanism;

[0031] Figure 9 This is a front sectional view of the linkage mechanism.

[0032] Figure 10 This is a schematic diagram of a partial cross-sectional view of the structure after cutting according to the present invention.

[0033] In the diagram: 1. Housing; 2. Drive mechanism; 201. Rack; 202. Gear; 203. Handle; 4. Radial cutting mechanism; 401. Push plate; 402. Radial cutting blade; 403. Positioning notch; 5. Axial cutting mechanism; 501. Tool holder; 502. Axial cutting blade; 503. Guide groove; 504. Receiving cavity; 6. Linkage mechanism; 601. First hydraulic component; 6011. First hydraulic cylinder; 6012. First piston rod; 6013. First piston; 602. Second hydraulic component 6021, Second hydraulic cylinder; 6022, Second piston rod; 6023, Second piston; 6024, Return spring; 603, Hydraulic pipe; 7, Clamping mechanism; 701, Clamping plate; 702, First V-shaped clamping block; 703, Second V-shaped clamping block; 704, Clamping spring; 8, Automatic positioning assembly; 801, Positioning shaft; 802, Slider; 803, First connecting rod; 804, Second connecting rod; 9, First guide post; 10, Second guide post; 20, Rootstock; 30, Scion; 40, L-shaped incision. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 2-8 A grafting device for fruit tree propagation includes a housing 1. The lower part of the housing 1 is open, and a radial cutting mechanism 4 is slidably connected inside it. A clamping mechanism 7 is provided between the radial cutting mechanism 4 and the housing 1 for clamping and fixing the rootstock 20 or scion 30. An axial cutting mechanism 5 is provided inside the housing 1 above the radial cutting mechanism 4. An automatic positioning component 8 connected to the axial cutting mechanism 5 is provided on the clamping mechanism 7 for positioning the axial cutting mechanism 5 and limiting the radial cutting mechanism 4. A driving mechanism 2 is provided on the housing 1 for driving the radial cutting mechanism 4, and a linkage mechanism 6 is connected between the radial cutting mechanism 4 and the axial cutting mechanism 5 for driving the axial cutting mechanism 5.

[0036] The radial cutting mechanism 4 includes a push plate 401 and a radial cutting blade 402. The push plate 401 and the radial cutting blade 402 are slidably connected in the housing 1. The push plate 401 is connected to the drive mechanism 2. The radial cutting blade 402 is fixedly connected to the push plate 401. A positioning notch 403 is provided on the outer side of the radial cutting blade 402.

[0037] The clamping mechanism 7 includes a clamping plate 701 slidably connected to the housing 1. A first V-shaped clamping block 702 is fixedly connected to the clamping plate 701. A second V-shaped clamping block 703 is fixedly connected to the inner side wall of the housing 1 at a position opposite to the first V-shaped clamping block 702. A clamping spring 704 is connected between the clamping plate 701 and the push plate 401. A support groove is provided on the clamping plate 701, and the radial cutting blade 402 is slidably inserted into the support groove. (See attached...) Figure 3 The height of the upper surface of the first V-shaped clamp 702 shown is the same as the height of the lower surface of the radial cutting blade 402.

[0038] The automatic positioning components 8 consist of two sets, symmetrically distributed front and back. Each automatic positioning component 8 includes a positioning shaft 801 connected to the axial cutting mechanism 5. The positioning shaft 801 is slidably mounted inside the housing 1, and a slider 802 is slidably connected to the positioning shaft 801. A first connecting rod 803 connects the slider 802 to the clamping plate 701, and a second connecting rod 804 connects the slider 802 to the housing 1. The first connecting rod 803 and the second connecting rod 804 are symmetrically distributed left and right. One end of the first connecting rod 803 is hinged to the slider 802, and the other end is hinged to the clamping plate 701. One end of the second connecting rod 804 is hinged to the slider 802, and the other end is hinged to the housing 1.

[0039] The axial cutting mechanism 5 includes a tool holder 501 fixedly connected between two positioning shafts 801. An axial cutting blade 502 is slidably connected inside the tool holder 501 and is connected to the linkage mechanism 6. The lower part of the tool holder 501 has an inverted U-shaped receiving cavity 504 that matches the positioning notch 403. This cavity is used to limit the positioning notch 403 and to receive the rootstock 20 or scion 30. The inner sidewall of the receiving cavity 504 has a guide groove 503 that matches the axial cutting blade 502 to ensure the sliding stability and accuracy of the axial cutting blade 502.

[0040] The linkage mechanism 6 includes a first hydraulic component 601 and a second hydraulic component 602. The first hydraulic component 601 is connected between the push plate 401 and the clamping plate 701. The second hydraulic component 602 is mounted on the tool holder 501 and is used to drive the axial cutting tool 502. A hydraulic pipe 603 is connected between the second hydraulic component 602 and the first hydraulic component 601.

[0041] Reference Figure 9The first hydraulic assembly 601 includes a first hydraulic cylinder 6011 and a first piston rod 6012. The first hydraulic cylinder 6011 is fixedly connected to the clamping plate 701, and the first piston rod 6012 is fixedly connected to the push plate 401. A first piston 6013, which is fixed to the first piston rod 6012, is slidably connected inside the first hydraulic cylinder 6011.

[0042] The second hydraulic assembly 602 includes a second hydraulic cylinder 6021 and a second piston rod 6022. The second hydraulic cylinder 6021 is fixedly connected to the tool holder 501, and the second piston rod 6022 is fixedly connected to the axial cutting blade 502. A second piston 6023, which is fixedly connected to the second piston rod 6022, is slidably connected inside the second hydraulic cylinder 6021. A return spring 6024 is connected between the second piston 6023 and the second hydraulic cylinder 6021.

[0043] Hydraulic oil is provided in the first hydraulic cylinder 6011 located between the first piston 6013 and the hydraulic pipe 603, the second hydraulic cylinder 6021 located between the second piston 6023 and the hydraulic pipe 603, and the hydraulic pipe 603.

[0044] Reference Figure 3-5 The drive mechanism 2 includes a rack 201 and two symmetrically distributed handles 203. The rack 201 is slidably connected to the housing 1 and fixedly connected to the push plate 401. The two handles 203 are rotatably connected to the outside of the housing 1 through a rotating shaft. Each handle 203 is fixedly connected to a gear 202 that meshes with the rack 201. The rotating shaft between the handles 203 and the housing 1 is coaxial with the gear 202.

[0045] The housing 1 is fixedly connected with a first guide post 9 and a second guide post 10. The push plate 401, the clamping plate 701 and the tool holder 501 are all slidably sleeved on the first guide post 9, and the tool holder 501 is slidably sleeved on the second guide post 10, which is used to ensure the sliding stability of the push plate 401, the clamping plate 701 and the tool holder 501.

[0046] In this invention, before cutting, the end of the rootstock 20 or scion 30 is trimmed to a flat cross-section perpendicular to the axial direction. Then, the axial cutting depth is determined based on the diameter of the rootstock 20 or scion 30. Since the radial cutting depth is the diameter of the rootstock 20 or scion 30, and the axial cutting depth is preferably twice the radial cutting depth, the radial cutting depth can be calculated by measuring the diameter of the rootstock 20 or scion 30, and the axial cutting depth can then be further calculated. Then, starting from the cross-section of the rootstock 20 or scion 30 (the cross-section being the trimmed flat end), a certain length is measured along the axial direction. This measured length is the same as the calculated axial cutting depth. After measurement, a mark is made at the designated position to complete the preliminary preparation work (this mark is the radial cutting position).

[0047] Next, the housing 1 is placed on the rootstock 20, ensuring that the upper surface of the first V-shaped clamp 702 is in contact with the markings made above. Then, the handles 203 on both sides can be pressed towards the rack 201 to rotate the handles 203 and the gear 202 by a certain angle. The rotation of the gear 202 can push the push plate 401 to slide closer to the second V-shaped clamp 703 through the rack 201. The push plate 401 will then push the clamping plate 701 and the first V-shaped clamp 702 to slide synchronously through the clamping spring 704 until the first V-shaped clamp 702 and the second V-shaped clamp 703 clamp the rootstock 20. The clamping action of the first V-shaped clamp 702 and the second V-shaped clamp 703 can center the rootstock 20 of different diameters, ensuring that the axis of the rootstock 20 is always in the predetermined position, while keeping the axis of the rootstock 20 perpendicular to the radial cutting blade 402, effectively preventing the radial cut from being skewed.

[0048] Then, by pressing the handle 203, the push plate 401 can be pushed further. At this time, due to the obstruction of the anvil 20, the first V-shaped clamping block 702 and the clamping plate 701 stop moving. Therefore, the sliding of the push plate 401 can not only compress the clamping spring 704, but also push the radial cutting blade 402 to extend outward from the support groove on the clamping plate 701 and slide to perform radial cutting on the anvil 20. Moreover, during the clamping process of the anvil 20 between the first V-shaped clamping block 702 and the second V-shaped clamping block 703, the clamping plate 701 and the housing 1 will push the blade holder 501 to slide closer to the second V-shaped clamping block 703 through the first connecting rod 803 and the second connecting rod 804, and finally move the blade holder 501 to the middle position of the anvil 20, which is the position where axial cutting is required, as shown in the attached figure. Figure 3 As shown. Therefore, when the radial cutting blade 402 makes a radial cut on the rootstock 20, until the cutting edge of the radial cutting blade 402 is inserted into the receiving cavity 504 on the blade holder 501, the positioning notch 403 on the radial cutting blade 402 will also be exactly against the edge of the receiving cavity 504. At this time, the edge of the receiving cavity 504 can block and restrict the radial cutting blade 402, and the radial cutting blade 402 has just completed the radial cut on the rootstock 20. That is, the depth to which the radial cutting blade 402 is inserted into the rootstock 20 is exactly half the diameter of the rootstock 20. Therefore, the radial cutting blade 402 can not only achieve radial cutting, but also, through the cooperation of the positioning notch 403 and the receiving cavity 504 on the blade holder 501, can precisely control the insertion depth of the radial cutting blade 402 to half the diameter of the rootstock 20, so that the semi-circular shape of the radial cut is regular and the size is accurate.

[0049] Furthermore, during the process of the pusher plate 401 pushing the radial cutting blade 402 to slide and cut, since the clamping plate 701 is stationary, the pusher plate 401 will simultaneously push the first piston rod 6012 and the first piston 6013 to slide within the first hydraulic cylinder 6011, and then push the second piston 6023 and the second piston rod 6022 downward through hydraulic oil. The second piston rod 6022 can directly drive the axial cutting blade 502 to slide downward and cut the anvil 20 in the axial direction, as detailed in the attached figure. Figure 10 As shown. Furthermore, since the blade holder 501 has been moved and positioned by the automatic positioning component 8 to the axial cutting position in the middle of the anvil 20, the accuracy of the axial cutting blade 502's cutting position can be guaranteed, and the purpose of cutting in two directions at once can also be achieved.

[0050] After completing the above cutting action, the two handles 203 can be opened and reset. At this time, the moving parts will be reset under the pulling force of the rack 201 and the rebound force of the clamping spring 704 and the return spring 6024. Then the housing 1 can be removed from the anvil 20. At this time, the radial cutting blade 402 has completed the radial cut. If the axial cut is not completely cut, an external auxiliary tool can be used to further cut along the axial cut to complete the L-shaped cut 40 on the anvil 20. Then, the scion 30 can be cut by following the above operation.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A grafting device for fruit tree propagation, characterized in that: The device includes a housing (1), a radial cutting mechanism (4) is slidably connected inside the housing (1), a clamping mechanism (7) is provided between the radial cutting mechanism (4) and the housing (1) for clamping and fixing the rootstock (20) or scion (30), an axial cutting mechanism (5) is provided inside the housing (1), an automatic positioning component (8) connected to the axial cutting mechanism (5) is provided on the clamping mechanism (7) for positioning the axial cutting mechanism (5) and limiting the radial cutting mechanism (4), a driving mechanism (2) is provided on the housing (1) for driving the radial cutting mechanism (4), and a linkage mechanism (6) is connected between the radial cutting mechanism (4) and the axial cutting mechanism (5) for driving the axial cutting mechanism (5).

2. The grafting device for fruit tree propagation according to claim 1, characterized in that: The radial cutting mechanism (4) includes a push plate (401) and a radial cutting blade (402). The push plate (401) and the radial cutting blade (402) are slidably connected inside the housing (1). The push plate (401) is connected to the drive mechanism (2). The radial cutting blade (402) is fixedly connected to the push plate (401). A positioning notch (403) is provided on the outer side of the radial cutting blade (402).

3. The grafting device for fruit tree propagation according to claim 2, characterized in that: The clamping mechanism (7) includes a clamping plate (701) slidably connected to the housing (1), a first V-shaped clamping block (702) fixedly connected to the clamping plate (701), a second V-shaped clamping block (703) fixedly connected to the housing (1) at a position opposite to the first V-shaped clamping block (702), and a clamping spring (704) connected between the clamping plate (701) and the push plate (401).

4. The grafting device for fruit tree propagation according to claim 3, characterized in that: The automatic positioning component (8) includes a positioning shaft (801) connected to the axial cutting mechanism (5), a slider (802) is slidably connected on the positioning shaft (801), a first connecting rod (803) is connected between the slider (802) and the clamping plate (701), and a second connecting rod (804) is connected between the slider (802) and the housing (1).

5. The grafting device for fruit tree propagation according to claim 4, characterized in that: The axial cutting mechanism (5) includes a knife holder (501) fixedly connected to the positioning shaft (801), an axial cutting knife (502) is slidably connected in the knife holder (501), the axial cutting knife (502) is connected to the linkage mechanism (6), and the lower part of the knife holder (501) is provided with a receiving cavity (504) that cooperates with the positioning notch (403) for limiting the positioning notch (403) and for receiving the rootstock (20) or scion (30).

6. The grafting device for fruit tree propagation according to claim 5, characterized in that: The linkage mechanism (6) includes a first hydraulic component (601) and a second hydraulic component (602). The first hydraulic component (601) is connected between the push plate (401) and the clamping plate (701). The second hydraulic component (602) is mounted on the tool holder (501) and is used to drive the axial cutting tool (502). A hydraulic pipe (603) is connected between the second hydraulic component (602) and the first hydraulic component (601).

7. The grafting device for fruit tree propagation according to claim 6, characterized in that: The first hydraulic assembly (601) includes a first hydraulic cylinder (6011) and a first piston rod (6012). The first hydraulic cylinder (6011) is fixedly connected to the clamping plate (701), and the first piston rod (6012) is fixedly connected to the push plate (401). A first piston (6013) fixed to the first piston rod (6012) is slidably connected inside the first hydraulic cylinder (6011).

8. The grafting device for fruit tree propagation according to claim 7, characterized in that: The second hydraulic assembly (602) includes a second hydraulic cylinder (6021) and a second piston rod (6022). The second hydraulic cylinder (6021) is fixedly connected to the tool holder (501), and the second piston rod (6022) is fixedly connected to the axial cutting tool (502). A second piston (6023) is slidably connected inside the second hydraulic cylinder (6021) and fixedly connected to the second piston rod (6022). A return spring (6024) is connected between the second piston (6023) and the second hydraulic cylinder (6021).

9. The grafting device for fruit tree propagation according to claim 8, characterized in that: Hydraulic oil is provided in the first hydraulic cylinder (6011) between the first piston (6013) and the hydraulic pipe (603), in the second hydraulic cylinder (6021) between the second piston (6023) and the hydraulic pipe (603), and in the hydraulic pipe (603).

10. The grafting device for fruit tree propagation according to claim 2, characterized in that: The drive mechanism (2) includes a rack (201) and two symmetrically distributed handles (203). The rack (201) is slidably connected to the housing (1) and fixedly connected to the push plate (401). The two handles (203) are rotatably connected to the outside of the housing (1) through a rotating shaft, and each handle (203) is fixedly connected to a gear (202) that meshes with the rack (201).

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