A grafting device for garden fruit trees
By designing a grafting device for orchard trees that integrates clamping, guiding, and fixing functions, the problems of uneven cutting surfaces and poor alignment accuracy in manual grafting have been solved, improving the grafting success rate and efficiency, and making it suitable for large-scale orchard production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, manual grafting requires high operator skills, and the unevenness and insufficient smoothness of the cutting surface result in poor cambium alignment accuracy, leading to low grafting success rate and low efficiency. Existing auxiliary tools cannot stably hold the rootstock, affecting the cut quality and scion insertion accuracy.
Design a grafting device for easy grafting of orchard fruit trees. It uses an openable semi-cylindrical body to fix the rootstock and an adjustable extension tube to precisely limit the insertion angle and depth of the scion. It integrates clamping, guiding and fixing functions, reducing the difficulty of operation and improving accuracy.
It effectively solves the problems of large shaking and difficulty in alignment in manual grafting, improves the grafting success rate and operation efficiency, reduces labor intensity, and is suitable for large-scale orchard production.
Smart Images
Figure CN224482248U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of fruit tree grafting equipment, specifically relating to a grafting device for garden fruit trees that is easy to graft. Background Technology
[0002] Grafting is an asexual reproduction technique in orchard and fruit tree cultivation, widely used for variety improvement, tree vigor restoration, enhanced stress resistance, and maintenance of superior traits. Currently, in agricultural production, the most widely used method is still traditional manual grafting, which relies mainly on the operator holding a grafting knife to independently complete a series of steps, including cutting the rootstock, cutting the scion, aligning the cambium layers of both, and finally binding and fixing them.
[0003] First, it demands extremely high levels of professional skills and practical experience from the operator; beginners need extensive practice to master the techniques. Second, the entire process relies entirely on manual control and visual calibration, making it highly susceptible to unevenness and insufficient smoothness due to hand tremors and uneven force, preventing the rootstock and scion from adhering tightly. Third, in the crucial cambium alignment stage, the lack of effective auxiliary positioning devices means it relies entirely on feel, resulting in poor alignment accuracy; even slight deviations can severely impact nutrient transport, leading to grafting failure. Furthermore, manual operation is labor-intensive and inefficient, making it difficult to meet the production needs of large-scale orchards.
[0004] To overcome the shortcomings of manual grafting, some simple auxiliary tools have appeared on the market, the most typical being grafting clips and fixing straps. These tools reduce the intensity of the binding work to some extent, but they cannot stably and reliably hold and fix the rootstock. The rootstock is still prone to shaking during cutting, affecting the quality of the cut, and they cannot limit or guide the insertion of the scion. The operator still needs to hold the small scion in the air, making it difficult to accurately control the angle and depth of its insertion into the rootstock cut, which can easily cause scion displacement, cut abrasion, or secondary misalignment of the cambium.
[0005] There is an urgent need for a specialized grafting device that integrates clamping, guiding, and fixing functions into one unit, effectively reducing the technical threshold and improving operational accuracy and efficiency. Therefore, a grafting device for easy grafting of orchard trees is proposed. Utility Model Content
[0006] The purpose of this invention is to provide a grafting device for garden fruit trees that is easy to graft. It has the advantages of integrating clamping, guiding and fixing functions into one. The rootstock can be quickly fixed by an openable semi-cylindrical body, and the insertion angle and depth of the scion can be precisely limited by an adjustable extension tube. It effectively solves the problems of low grafting success rate and low operation efficiency caused by large shaking during manual operation, difficulty in accurately aligning the cambium layer, and the single function of existing auxiliary tools in the prior art.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a grafting device for garden fruit trees that is easy to graft, including a pair of opposing semi-cylindrical bodies. The outer wall of the semi-cylindrical body is provided with a grafting interface, and an extension tube is connected to the grafting interface. The extension tube is connected to the grafting interface by a thread. Connecting blocks are provided at the front and rear ends of the semi-cylindrical bodies. The connecting blocks are connected to a clamping arm one by a rotating shaft. The clamping arm one is connected to a clamping arm two by a connecting shaft. A rotating block is provided on the clamping arm one. A screw rod is passed through the rotating block. The front end of the screw rod passes through the rotating block and extends backward and through the corresponding through hole at the rear end of the clamping arm two. A rotating rod is provided at the end of the screw rod.
[0008] Preferably, the extension tube is a telescopic structure, including an inner tube and an outer tube, with the inner tube sleeved on the outer tube and connected by threads.
[0009] Preferably, the inner wall of the semi-cylindrical body is provided with anti-slip texture, which is a staggered raised structure.
[0010] Preferably, the pivot between the clamping arm and the connecting block is a damping pivot.
[0011] Preferably, the inner wall of the grafting interface is provided with internal threads, and the end of the extension tube is provided with external threads that mate with the internal threads of the inner wall of the grafting interface.
[0012] Preferably, a bushing is embedded in the through hole at the rear end of the second clamping arm through which the lead screw passes.
[0013] Preferably, the outer circumferential surface of the rotary rod is provided with anti-slip texture, and the semi-cylindrical body, clamping arm one and clamping arm two are made of engineering plastic.
[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0015] 1. This utility model can quickly fix the rootstock and use an adjustable extension tube to accurately guide and fix the scion. It is simple to operate and effectively avoids damage caused by improper operation in traditional grafting. It is highly practical.
[0016] 2. This utility model has the advantage of integrating clamping, guiding and fixing functions into one. It can quickly fix the rootstock through the openable semi-cylindrical body and use the adjustable extension tube to accurately limit the insertion angle and depth of the scion. It effectively solves the problems of low grafting success rate and low operation efficiency caused by large shaking during manual operation, difficulty in accurately aligning the cambium layer and the single function of existing auxiliary tools in the prior art. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a side view of a grafting device for arborescent fruit trees, which is easy to graft, according to one embodiment.
[0019] Figure 2 A three-dimensional structural diagram of a grafting device for arborescent fruit trees that is easy to graft, according to one embodiment;
[0020] Figure 3 A three-dimensional structural diagram of a grafting device for arborescent fruit trees that is easy to graft, according to one embodiment;
[0021] In the above figures, 1. Semi-cylindrical body, 2. Grafting interface, 3. Extension tube, 4. External thread, 5. Connecting block, 6. Rotating shaft, 7. Clamping arm one, 8. Clamping arm two, 9. Connecting shaft, 10. Rotating block, 11. Lead screw, 12. Rotating rod. Detailed Implementation
[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0024] Example 1, as Figure 1-3 As shown, a grafting device for horticultural fruit trees facilitates grafting. It includes a pair of opposing semi-cylindrical bodies 1, which, when joined together, form a complete cylinder used to enclose and secure the cut portion of the rootstock, providing a stable foundation and working platform for grafting operations. By firmly confining the rootstock within the cylinder, it effectively prevents the rootstock from shifting during the cutting of the scion or subsequent operations, ensuring a smooth and high-quality cut. It also facilitates the determination of the grafting site, eliminating the need for the operator to painstakingly search for the cutting position.
[0025] The outer wall of the semi-cylindrical body 1 is provided with a grafting interface 2, and an extension tube 3 is connected to the grafting interface 2. The extension tube 3 is threaded to the grafting interface 2. The grafting interface 2 is a hole opened in the side wall of the semi-cylindrical body 1 for connecting the extension tube 3. The extension tube 3 serves as a precise guide channel to constrain and guide the insertion path of the scion, ensuring that the scion can be stably inserted into the incision of the rootstock, which greatly improves the accuracy of cambium alignment. During the insertion process, the extension tube 3 can also temporarily hold and fix the small scion, freeing up the operator's other hand and reducing the difficulty of operation.
[0026] Connecting blocks 5 are provided at both ends of the semi-cylindrical body 1. The connecting blocks 5 are connected to clamping arm 7 through a rotating shaft 6. Clamping arm 7 is connected to clamping arm 8 through a connecting shaft 9. The connecting shaft 9 is a hinge point, usually a pin, which allows clamping arm 7 and clamping arm 8 to rotate freely relative to each other. A rotating block 10 is provided on clamping arm 7. A lead screw 11 is inserted through the rotating block 10. The front end of the lead screw 11 passes through the rotating block 10 and extends backward, passing through the corresponding through hole at the rear end of clamping arm 8. A rotating rod 12 is provided at the end of the lead screw 11.
[0027] Connecting block 5, clamping arm 7, and clamping arm 8 together form a linkage-type clamping mechanism. Connecting block 5 transmits force to the semi-cylindrical body 1. The hinged connection of clamping arm 7 and clamping arm 8 converts the linear motion of lead screw 11 into the opening and closing motion of the clamping arms, providing a lever-based force-saving effect. This allows clamping force to be generated by rotating the rotating rod 12, easily holding rootstocks of different thicknesses. The linkage design of the clamping arms enables the two semi-cylindrical bodies to be aligned and evenly cover the outer ring of the rootstock, avoiding excessive stress at a single point that could damage the tree.
[0028] The rotating block 10, lead screw 11, and rotary rod 12 enable driving and locking. The thread inside the rotating block 10 engages with the lead screw 11, and the rotating rod 12 drives the lead screw 11 to rotate. Due to the threaded engagement between the rotating block 10 and the lead screw 11, the rotational motion can be converted into the linear forward and backward movement of the lead screw 11, thereby controlling the opening and closing of clamping arms 7 and 8. The lead screw 11 transmission features high precision and good self-locking. It allows for fine adjustment of the clamping force, and once locked, it will not loosen under vibration, exhibiting extremely high reliability. Moreover, the lead screw 11 mechanism can obtain a large output clamping force with a very small input force, making operation labor-saving.
[0029] The specific design of the aforementioned key components will be discussed in detail below:
[0030] The extension tube 3 is a telescopic structure, comprising an inner tube and an outer tube, with the inner tube threadedly connected to the outer tube. By rotating and adjusting the length of the extended inner tube, the length of the guide channel can be changed, allowing for flexible adjustment according to the length and thickness of the scion. This ensures effective guidance and support for scions of different sizes, expanding the applicability of the device. A shorter extension tube 3 is suitable for short scions and situations with limited operating space; a longer extension tube 3 provides more stable guidance for long scions, preventing them from bending or shifting.
[0031] The pivot 6 between the clamping arm 7 and the connecting block 5 is a damping pivot 6. The damping pivot 6 has a large rotational resistance. The operator can freely adjust the clamping arm to any angle and hold it in that position, facilitating grafting operations in the most comfortable posture.
[0032] The grafting interface 2 has an internal thread on its inner wall, and the end of the extension tube 3 has an external thread 4 that mates with the internal thread on the inner wall of the grafting interface 2. The threaded connection of the internal thread and the external thread 4 enables a detachable connection between the grafting interface 2 and the extension tube 3. The extension tube 3 can be installed or removed as needed, making it convenient to replace extension tubes 3 of different diameters with scions of different thicknesses. It can serve as an extension function and also facilitates thorough cleaning and maintenance of the device, preventing the residue of pathogens.
[0033] A bushing is embedded in the through hole at the rear end of the clamping arm 2 8 through which the lead screw 11 passes. The bushing reduces friction, protects the components, and transforms the sliding friction between the lead screw 11 and the clamping arm 2 8 into sliding friction between the lead screw 11 and the bushing. This effectively reduces operating resistance, makes rotation smoother, and avoids wear on the clamping arm body after long-term use, thus extending the equipment's lifespan.
[0034] The inner wall of the semi-cylindrical body 1 is provided with anti-slip textures, which are staggered raised structures. The outer circumferential surface of the rotating rod 12 is also provided with anti-slip textures. The semi-cylindrical body 1, clamping arm 7, and clamping arm 8 are made of engineering plastic. The anti-slip textures are distributed on the inner wall of the semi-cylindrical body 1 and the surface of the rotating rod 12. The anti-slip textures on the inner wall of the semi-cylindrical body 1 significantly increase the friction between the rod and the rootstock bark, preventing slippage and ensuring a firm grip. The anti-slip textures on the rotating rod 12 facilitate the application of force and prevent hand slippage. The engineering plastic material makes the entire device lightweight, easy to carry and operate outdoors; at the same time, it has sufficient strength and toughness, is corrosion-resistant and rust-free, making it very suitable for the humid environment of orchards and with a long service life.
[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A grafting device for horticultural fruit trees that facilitates grafting, comprising a pair of opposing, joined semi-cylindrical bodies, characterized in that, The outer wall of the semi-cylindrical body is provided with a grafting interface, and an extension tube is connected to the grafting interface. The extension tube is connected to the grafting interface by a thread. Connecting blocks are provided at the front and rear ends of the semi-cylindrical body. The connecting blocks are connected to clamping arm one by a rotating shaft. Clamping arm one is connected to clamping arm two by a connecting shaft. A rotating block is provided on clamping arm one. A lead screw is passed through the rotating block. The front end of the lead screw passes through the rotating block and extends backward and through the corresponding through hole at the rear end of clamping arm two. A rotating rod is provided at the end of the lead screw.
2. The grafting device for horticultural fruit trees according to claim 1, characterized in that, The extension tube is a telescopic structure, including an inner tube and an outer tube, with the inner tube sleeved on the outer tube and connected by threads.
3. The grafting device for garden fruit trees that facilitates grafting according to claim 1, characterized in that, The inner wall of the semi-cylindrical body is provided with anti-slip texture, which is a staggered raised structure.
4. The grafting device for horticultural fruit trees according to claim 1, characterized in that, The pivot between the clamping arm and the connecting block is a damping pivot.
5. A grafting device for horticultural fruit trees that facilitates grafting, as described in claim 1 or 2, characterized in that, The inner wall of the grafting interface is provided with internal threads, and the end of the extension tube is provided with external threads that mate with the internal threads of the inner wall of the grafting interface.
6. A grafting device for horticultural fruit trees that facilitates grafting, as described in claim 1, is characterized in that, A bushing is embedded in the through hole at the rear end of the clamping arm through which the lead screw passes.
7. A grafting device for horticultural fruit trees that facilitates grafting, as described in claim 1, is characterized in that... The outer circumferential surface of the rotating rod is provided with anti-slip texture, and the semi-cylindrical body, clamping arm one and clamping arm two are made of engineering plastic.