A device for grafting a rootstock of a Chinese jujube tree

Abstract

The utility model discloses a kind of stock grafting used wedge grafting device, comprising: symmetrical arrangement and first end hinged clamping half ring one and clamping half ring two, the inner ring surface of both oppositely constitutes clamping hole site, clamping half ring one second end is equipped with rotating hole, clamping half ring two second end is equipped with corresponding opening slot;Still including wedge knife subassembly, its pivot is rotatably connected with rotating hole, blade is equipped with the blade of one end of cutter bar and insertion, blade wedge surface coincides with the axis of clamping hole site, pivot is equipped with pivot locking block on, parallel with cutter bar, spacing adaptation clamping half ring two thickness of pivot locking block.The utility model is through the stable clamping of clamping half ring, the rotation cooperation of pivot and rotating hole and the dynamic locking of pivot locking block, solved the problem that stock wedge grafting in prior art is easily displaced due to reaction force, wedge opening cannot be accurately centered, and operation is easy to damage stock, affect wedge grafting precision and grafting effect.

Description

Technical Field

[0001] This utility model relates to the field of jujube grafting technology, and more specifically to a rootstock splitting grafting device for jujube grafting. Background Technology

[0002] In the jujube grafting industry, the core requirements for cleft grafting are to achieve stable fixation of the rootstock and precise clefting. These two factors directly determine the subsequent fit of the scion and the grafting survival rate. Currently, the industry mainly adopts two traditional technical solutions for cleft grafting of jujube rootstock: one is to rely entirely on manual handling of the rootstock and manually cleft it using a clefting tool; the other is to use a simple fixing tool to initially limit the position of the rootstock before using a tool to perform the cleft grafting.

[0003] From the perspective of practical application, manual hand-held cleft grafting has obvious drawbacks: First, although the diameter of the jujube rootstock is relatively regular, it is difficult to keep the rootstock in a stable position when held manually. The reaction force generated by the clefting tool when it is chopped down can easily cause the rootstock to shift or rotate, making it impossible to align the cleft with the central axis of the rootstock. This results in asymmetry of the cambium layers on both sides of the cleft, making it difficult to accurately align the cambium layers of the scion and rootstock, which directly affects the grafting survival rate. Second, manual operation requires simultaneous control of the rootstock fixing and the force and angle of the clefting tool. This is not only labor-intensive, but also prone to over-clefting of the rootstock or insufficient cleft depth due to improper force control, further reducing the quality and efficiency of cleft grafting.

[0004] While using simple fixing tools to assist in cleft grafting alleviates the difficulty of holding the rootstock in place to some extent, key technical shortcomings remain: Firstly, existing simple fixing tools can only achieve a static initial positioning of the rootstock. At the moment the chopping blade assembly contacts the rootstock during the cleft grafting, the reaction force can easily cause a slight displacement of the rootstock within the fixing tool, still failing to prevent cleft offset and making it difficult to guarantee grafting accuracy. Secondly, these fixing tools and the chopping blade assembly are mostly separate designs, requiring a single person to frequently switch between fixing the rootstock and operating the chopping blade assembly, or requiring two people to work together, which not only increases the complexity of operation but also reduces the continuity and efficiency of the cleft grafting process. In addition, existing fixing tools lack a protective structure adapted to the rootstock, and improper clamping force during the fixing process can easily damage the rootstock's bark and xylem, disrupting the rootstock's vascular tissue and further affecting nutrient transport and rootstock survival after grafting.

[0005] Therefore, how to provide a new rootstock cleft grafting device for jujube grafting that ensures the rootstock remains stable during the cleft grafting process, avoids displacement of the rootstock due to the reaction force of the clefting tool, and can also achieve precise centering of the rootstock cleft, reducing damage to the bark and xylem of the rootstock during the cleft grafting operation, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a rootstock cleft grafting device for jujube grafting, which aims to solve the technical problems mentioned above, such as the rootstock being easily displaced due to reaction force during cleft grafting, the cleft not being accurately centered, and the operation easily damaging the rootstock, thus affecting the cleft grafting accuracy and grafting effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A rootstock cleft grafting device for jujube grafting includes:

[0009] A symmetrically arranged clamping half-ring one and clamping half-ring two are provided. The first end of clamping half-ring one along its circumference is hinged to the first end of clamping half-ring two along its circumference. The inner ring surface of clamping half-ring two is arranged opposite to the inner ring surface of clamping half-ring one and forms a clamping hole. The second end of clamping half-ring one is provided with a rotating hole along its tangent direction of rotation. The second end of clamping half-ring two is provided with an opening groove along its tangent direction of rotation. The opening groove is arranged corresponding to the rotating hole and its opening direction is opposite to the center of clamping half-ring two.

[0010] The cleaver assembly includes a rotating shaft and a cleaver shank. The axial surface of the rotating shaft near its first end is rotatably connected to a rotating hole. The first end of the cleaver shank is located on the concave side of the clamping half-ring one and is fixedly connected to the axial surface of the rotating shaft. A blade is inserted into the shank surface near its first end. The cleaver surface of the blade coincides with the axis of the clamping hole during the rotation of the cleaver shank. A rotating shaft locking block is fixedly connected to the axial surface of the rotating shaft near its second end. The rotating shaft locking block is arranged parallel to the cleaver shank and faces the same direction. The distance between the rotating shaft locking block and the cleaver shank corresponds to the thickness of the second end of the clamping half-ring two.

[0011] Therefore, the symmetrically arranged clamping semi-ring one and clamping semi-ring two with their first ends hinged together form clamping holes on their relative inner ring surfaces, achieving stable clamping and initial positioning of the rootstock and preventing radial displacement and damage to the bark. The rotating hole at the second end of clamping semi-ring one provides rotational support for the splitting blade assembly shaft. The opening groove at the second end of clamping semi-ring two, facing away from its own center, provides a channel for the shaft and shaft locking block to pass through, while avoiding interference between components. The shaft locking block on the shaft, parallel to the blade bar and spaced to match the thickness of clamping semi-ring two, can rotate synchronously with the shaft during splitting and press against clamping semi-ring two, achieving dynamic locking of the semi-ring clamping state and preventing the rootstock from shifting due to the reaction force of the blade splitting downwards. The blade inserted on the blade bar has its splitting surface coinciding with the axis of the clamping hole when rotating, enabling precise splitting along the central axis of the rootstock to form a symmetrical and uniform split, ensuring precise alignment of the cambium layer of the scion and rootstock.

[0012] Preferably, the first end of the clamping half-ring one is fixedly connected to a pin ring one, and the first end of the clamping half-ring two is fixedly connected to a pin ring two arranged coaxially with the pin ring, and also includes a pin, which is pin-connected to the inner ring surfaces of pin ring one and pin ring two.

[0013] Preferably, the tool holder has a recessed section near its first end, and a slot is formed on the surface of the tool holder corresponding to the recessed section, and the blade is inserted into the slot.

[0014] Preferably, the plane containing the cutting edge of the blade is arranged to coincide with the axis of the clamping semi-ring.

[0015] Preferably, the axes of clamping half-ring one and clamping half-ring two are arranged coaxially.

[0016] Preferably, it also includes a grip assembly, which includes a grip one and a grip two, the grip one and the grip two being fixedly connected to the second ends of the clamping half ring one and the clamping half ring two, respectively.

[0017] Preferably, both grip one and grip two are arranged at an angle.

[0018] Preferably, the gripping ends of grip one and grip two are arranged at intervals.

[0019] Preferably, the chopping knife assembly also includes a handle, which is fixedly connected to the blade face near its second end.

[0020] Preferably, it also includes spring pads, with the two spring pads being fixedly connected to the inner ring surfaces of clamping half-ring one and clamping half-ring two, respectively.

[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a rootstock cleft grafting device for jujube grafting, which has the following beneficial effects:

[0022] 1. Stable clamping and maintenance of the rootstock: The symmetrically hinged clamping half-ring one and clamping half-ring two form a clamping hole position that is adapted to the rootstock, achieving initial stable clamping; the distance between the rotating shaft locking block on the rotating shaft and the blade bar is adapted to the thickness of the clamping half-ring two. During chopping, it rotates synchronously with the rotating shaft and engages with the outside of the clamping half-ring two, which can firmly maintain the closed clamping state of the two half-rings, effectively counteracting the reaction force generated by the blade chopping down, avoiding displacement of the rootstock or loosening of the half-rings due to the reaction force, and solving the problem of easy failure of static fixation in traditional devices.

[0023] 2. Precise centering of the split: When the blade rotates with the blade handle, the split surface and the axis of the clamping hole are strictly coincident, which can accurately split along the central axis of the rootstock, ensuring that the cambium on both sides of the split is symmetrical and uniform. This lays the foundation for the precise alignment of the cambium of the scion and the rootstock, greatly improving the grafting survival rate and making up for the defects of easy deviation of the split by hand or simple tools.

[0024] 3. Integrated structure and simplified operation: The chopping knife assembly is connected to the clamping half ring by a rotating shaft, eliminating the need for separation. A single person can complete the continuous actions of fixing the rootstock, maintaining the clamping state, and chopping, simplifying the operation process and avoiding the trouble of frequently switching actions required by traditional separate tools, thus improving work efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is a structural schematic diagram of a rootstock cleft grafting device (open state) for jujube grafting provided by this utility model;

[0027] Figure 2 The attached figure is a structural schematic diagram of a rootstock cleft grafting device (closed state) for jujube grafting provided by this utility model;

[0028] Figure 3 The attached figure is a structural schematic diagram of a rootstock cleft grafting device (cleft grafting state) for jujube grafting provided by this utility model;

[0029] Figure 4 for Figure 2 A magnified view of a section at point A;

[0030] Figure 5 The attached figure is a schematic diagram of the structure of the clamping semi-ring two provided by this utility model;

[0031] Figure 6 The attached figure is a structural schematic diagram of the clamping half-ring provided by this utility model;

[0032] Figure 7 The attached figure is a structural schematic diagram of the cleaver assembly provided by this utility model;

[0033] Figure 8 for Figure 7 A magnified view of section B.

[0034] in:

[0035] 1-Clamping half-ring one; 2-Clamping half-ring two; 3-Cleaving knife assembly; 4-Pin; 5-Grip assembly; 6-Spring pad; 11-Pin ring one; 12-Rotating hole; 21-Pin ring two; 22-Opening groove; 31-Spindle; 32-Knife bar; 33-Blade; 34-Handle; 51-Grip one; 52-Grip two; 311-Spindle locking block; 321-Interlocking groove. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] See appendix Figure 1 To be continued Figure 4 This utility model embodiment discloses a rootstock cleft grafting device for jujube grafting, including: symmetrically arranged clamping half ring 1 and clamping half ring 2, and cleft blade assembly 3.

[0038] The first end of the clamping half ring 1 along its circumference is hinged to the first end of the clamping half ring 2 along its circumference. The inner ring surface of the clamping half ring 2 is arranged opposite to the inner ring surface of the clamping half ring 1 and forms a clamping hole. The second end of the clamping half ring 1 is provided with a rotating hole 12 along its rotational tangent direction. The second end of the clamping half ring 2 is provided with an opening groove 22 along its rotational tangent direction. The opening groove 22 is arranged corresponding to the rotating hole 12 and its opening direction is opposite to the center of the clamping half ring 2.

[0039] The chopping knife assembly 3 includes a rotating shaft 31 and a knife bar 32. The axial surface of the rotating shaft 31 near its first end is rotatably connected to the rotating hole 12. The first end of the knife bar 32 is located on the concave side of the clamping half ring 1 and is fixedly connected to the axial surface of the rotating shaft 31. A blade 33 is inserted into the bar surface of the knife bar 32 near its first end. The chopping surface of the blade 33 coincides with the axis of the clamping hole during the rotation of the knife bar 32. A rotating shaft locking block 311 is fixedly connected to the axial surface of the rotating shaft 31 near its second end. The rotating shaft locking block 311 is arranged parallel to the knife bar 32 and facing the same direction. The distance between the rotating shaft locking block 311 and the knife bar 32 corresponds to the thickness of the second end of the clamping half ring 2.

[0040] See appendix Figure 5 and attached Figure 6 The first end of the clamping half-ring 1 is fixedly connected to a pin ring 11, and the first end of the clamping half-ring 2 is fixedly connected to a pin ring 21 arranged coaxially with pin ring 11. It also includes a pin 4, which is pinned to the inner ring surfaces of pin ring 11 and pin ring 21. Thus, the hinge connection between the clamping half-ring 1 and the clamping half-ring 2 is achieved through the cooperation of pin ring 11, pin ring 21, and pin 4. The core benefits lie in the stability of the hinge connection and the ease of maintenance.

[0041] Specifically, the second ends of both the clamping half-ring 1 and the clamping half-ring 2 are folded with flanges in their radial direction. The flange of the clamping half-ring 1 has a rotating hole 12, and the flange of the clamping half-ring 2 has an opening groove 22.

[0042] See appendix Figure 7 and attached Figure 8 The blade shank 32 has a recessed section near its first end, and a slot 321 is formed on the surface of the blade shank 32 corresponding to the recessed section. The blade 33 is inserted into the slot 321. Therefore, the plug-in connection does not require complicated tools. When the blade 33 becomes worn or dull, or when it is necessary to replace it with a different size blade 33 according to the diameter of the rootstock, it can be directly plugged in and replaced, which greatly shortens the tool adjustment time, ensures the continuity of the splitting operation, and solves the problem of cumbersome replacement of the traditional fixed connection of the blade 33.

[0043] In this embodiment, the plane where the cutting edge of the blade 33 is located coincides with the axis of the clamping half-ring 1.

[0044] In one embodiment, the axes of clamping half-ring 1 and clamping half-ring 2 are arranged coaxially.

[0045] In some embodiments, the system further includes a grip assembly 5, which includes a first grip 51 and a second grip 52, respectively fixedly connected to the second ends of the clamping half-ring 1 and the clamping half-ring 2. Thus, the grip assembly 5 provides the operator with a fulcrum for applying force, allowing the operator to open and close the half-rings by gripping the first grip 51 and the second grip 52 without direct contact with the half-ring body; simultaneously, the lever principle is used to reduce the clamping force intensity, thereby reducing labor intensity and making it suitable for long-term batch splitting operations.

[0046] In other embodiments, both grip 1 51 and grip 2 52 are arranged at an angle.

[0047] In some other specific embodiments, the gripping ends of grip one 51 and grip two 52 are arranged at intervals.

[0048] In another embodiment, the chopping blade assembly 3 further includes a handle 34, which is fixedly connected to the blade face near its second end of the blade shank 32. Thus, by adding a handle 34 to the second end of the blade shank 32, the operability and safety of the chopping blade assembly 3 are significantly improved.

[0049] In this embodiment, two spring pads 6 are also included, which are fixedly connected to the inner ring surfaces of clamping half-ring 1 and clamping half-ring 2, respectively. Thus, the spring pads 6 are elastic and can buffer the rigid pressure of the half-rings on the rootstock during clamping, avoiding damage to the rootstock bark and deformation of the xylem due to excessive clamping force, protecting the integrity of the rootstock's vascular tissue, and reducing the impact on subsequent nutrient transport.

[0050] The method of using the rootstock cleft grafting device for jujube grafting provided in this embodiment is as follows:

[0051] 1. Press the handle 1 51 and handle 2 52 inward with both hands, which will cause the clamping half ring 1 1 and clamping half ring 2 2 to gradually close until the spring pad 6 on the inner ring surface is tightly attached to the circumferential surface of the rootstock. At this time, the rootstock is initially stabilized and the spring pad 6 can buffer the clamping force to avoid damaging the bark and wood of the rootstock. The rotating shaft 31 and the rotating shaft locking block 311 are located on the convex side of the clamping half ring 2 2 through the opening groove.

[0052] 2. Hold the handle assembly 5 with one hand to keep it in a stable clamping state, and hold the handle 34 of the chopping knife assembly 3 with the other hand. Slowly rotate the handle 34 clockwise to drive the knife bar 32 and the blade 33 to rotate around the rotating shaft 31. The rotating shaft locking block 311 is offset from the opening of the opening groove 22, and the clamping half ring 1 and clamping half ring 2 are locked together.

[0053] 3. During the rotation, since the cleft of the blade 33 coincides with the axis of the clamping hole, the blade will precisely cut into the central axis of the rootstock. As the handle 34 continues to apply force, the blade 33 gradually penetrates into the rootstock until a cleft depth that meets the grafting requirements is formed. During this process, the rotating shaft locking block 311 rotates synchronously with the rotating shaft 31 and engages with the outside of the clamping half ring 2, firmly maintaining the closed clamping state of the two half rings, counteracting the reaction force generated by the downward cleft of the blade 33, and preventing the rootstock from shifting.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rootstock cleft grafting device for jujube grafting, characterized in that, include: A symmetrically arranged clamping half-ring one (1) and clamping half-ring two (2) are provided. The first end of the clamping half-ring one (1) along its circumference is hinged to the first end of the clamping half-ring two (2) along its circumference. The inner ring surface of the clamping half-ring two (2) is arranged opposite to the inner ring surface of the clamping half-ring one (1) and forms a clamping hole. The second end of the clamping half-ring one (1) is provided with a rotating hole (12) along its rotational tangent direction. The second end of the clamping half-ring two (2) is provided with an opening groove (22) along its rotational tangent direction. The opening groove (22) is arranged corresponding to the rotating hole (12) and its opening direction is opposite to the center of the clamping half-ring two (2). A chopping knife assembly (3) includes a rotating shaft (31) and a knife bar (32). The axial surface of the rotating shaft (31) near its first end is rotatably connected to the rotating hole (12). The first end of the knife bar (32) is located on the concave side of the clamping half ring (1) and is fixedly connected to the axial surface of the rotating shaft (31). A blade (33) is inserted into the bar surface of the knife bar (32) near its first end. The chopping surface of the blade (33) during the rotation of the knife bar (32) coincides with the axis of the clamping hole. A rotating shaft locking block (311) is fixedly connected to the axial surface of the rotating shaft (31) near its second end. The rotating shaft locking block (311) is arranged parallel to the knife bar (32) and facing the same direction. The distance between the rotating shaft locking block (311) and the knife bar (32) corresponds to the thickness of the second end of the clamping half ring (2).

2. The rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, The first end of the clamping half ring (1) is fixedly connected to the first pin ring (11), and the first end of the clamping half ring (2) is fixedly connected to the second pin ring (21) arranged coaxially with the first pin ring (11). It also includes a pin (4), which is pinned to the inner ring surface of the first pin ring (11) and the second pin ring (21).

3. The rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, The blade (32) has a recessed section near its first end, and a insertion groove (321) is opened on the surface of the blade (32) corresponding to the recessed section. The blade (33) is inserted into the insertion groove (321).

4. The rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, The plane of the blade (33) is arranged to coincide with the axis of the clamping half-ring (1).

5. The rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, The clamping half-ring one (1) and the clamping half-ring two (2) are arranged coaxially.

6. The rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, It also includes a grip assembly (5), which includes a grip one (51) and a grip two (52), the grip one (51) and the grip two (52) being fixedly connected to the second ends of the clamping half ring one (1) and the clamping half ring two (2), respectively.

7. A rootstock cleft grafting device for jujube grafting according to claim 6, characterized in that, Both grip one (51) and grip two (52) are arranged at an angle.

8. A rootstock cleft grafting device for jujube grafting according to claim 6, characterized in that, The grip ends of the first grip (51) and the second grip (52) are arranged at intervals.

9. A rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, The chopping knife assembly (3) also includes a handle (34), which is fixedly connected to the blade (32) near its second end.

10. A rootstock cleft grafting device for jujube grafting according to claim 1, characterized in that, It also includes spring pads (6), and the two spring pads (6) are fixedly connected to the inner ring surfaces of the clamping half ring one (1) and the clamping half ring two (2), respectively.

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