A knife-changing device for jujube tree grafting

Abstract

The present invention provides a tool-changing device for jujube tree grafting, which includes a tool set, a cutter disc, a cam mechanism and a power assembly. The tool set includes four tools: a scraping knife, a first notch knife, a second notch knife and a cutting knife. The cutter disc is of an annular structure, and a cam mechanism is arranged at the central position of the cutter disc. The cam mechanism is relatively independent of the cutter disc. Four guide grooves are evenly arranged on the cutter disc, and the scraping knife, the first notch knife, the second notch knife and the cutting knife are respectively slidably installed in the guide grooves. Limit members are arranged at the tails of the tools in the tool set. The cutter disc is connected to the power assembly, and the power assembly is driven by a servo motor to drive the cutter disc to rotate. When the cutter disc rotates, the non-moving cam mechanism will push out the tools, and the four tools cycle repeatedly, facilitating the tool-changing operation. The structure of the present invention is scientifically and reasonably designed, the tool-changing is safe and smooth, the functions are diverse and complete, it is small, light and convenient to carry, and can effectively improve the working efficiency of jujube tree grafting.

Description

Technical Field

[0001] The invention belongs to the technical field of plant grafting, and in particular relates to a knife changing device used for jujube tree grafting. Background Art

[0002] Grafting of jujube trees has the advantages of high reproduction rate, fast seedling raising speed, stable genetic traits, and early fruiting. It is one of the commonly used methods for cultivating improved jujube seedlings. Many knives are used in the grafting process, which is inconvenient to carry, resulting in low work efficiency. At the same time, the blades are exposed during use, which can easily scratch your hands when you pick them up. The knives are exposed to the air for a long time, which reduces the life of the knives.

[0003] When grafting jujube trees, it is usually necessary to go through several steps, including scraping, cutting, grafting, and wrapping with film. There are many types of knives involved, and the knives need to be replaced frequently. Operators need to carry plastic film with them. There are safety hazards when switching knives during work, and the efficiency is low. Most similar devices are designed for a single tool or grafting auxiliary device, which has certain limitations. At the same time, different regions have different requirements for the use of knives. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a tool changing device for jujube tree grafting in view of the deficiencies of the above-mentioned prior art. The tool changing device has smooth tool changing, is safe and reliable, is easy to operate, is small in size and easy to carry, has complete functions, can complete a full set of jujube tree grafting operations, is highly practical, and can be promoted for use.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a tool changing device for jujube tree grafting, characterized in that it includes a tool group, a knife disc, a cam mechanism, a power component, a knife disc housing and a connecting housing, the knife disc is a circular metal part, the tool group includes a scraper, a first slitting knife, a second slitting knife and a cutting knife, four guide rail grooves are equidistantly arranged on the knife disc, and the scraper, the first slitting knife, the second slitting knife and the cutting knife are slidably installed in the four guide rail grooves respectively, the cam mechanism includes a cam and a connecting rod, one end of the connecting rod is fixedly connected to the connecting housing, and the other end of the connecting rod is fixedly connected to the cam, the connecting rod passes through the hollow position of the knife disc, the cam and the guide rail groove are in the same horizontal position, the tails of the four knives contact and press with the cam, the knife disc housing is rotatably sleeved on the outer peripheral side of the connecting housing, the knife disc housing and the knife disc are connected by bolts, and a knife outlet for extending the knife is opened on the knife disc housing, and the knife outlet is a rectangular flat opening;

[0006] The power assembly includes a steering gear and a transmission gear set. The steering gear is fixedly mounted on the connecting rod. The transmission gear set includes an inner gear ring, a first gear, a second gear, a gear shaft and a third gear. The inner gear ring is fixedly connected to the cutter disc. The second gear is fixedly connected to the third gear through the gear shaft. The first gear is arranged on the output shaft of the steering gear. The first gear is meshed and connected to the second gear. The third gear is meshed and connected to the inner gear ring. The steering gear rotates to drive the transmission gear set to operate, thereby driving the cutter disc to rotate. The cam is fixed. When the cutter moves to the top of the cam, the cutter is pushed out of the cutting edge for easy use. The short diameters of the remaining three cutters contact the cam and remain inside the cutter disc housing. When the steering gear continues to rotate, the cutter disc rotates again, and the next cutter is pushed out. The reciprocating cycle completes the process of changing the cutter.

[0007] Preferably, the tails of the four types of tools that contact the cam are all provided with limiters to prevent the tools from escaping from the guide grooves. The scraper is composed of an integrally formed scraper blade, a bent body and a connector. The scraper blade is 12 mm long and 27 mm wide, and the blade inclination angle of the scraper blade is 20°. The scraper is mainly used to scrape off the outer bark of perennial rootstocks, exposing the new bark for easy film wrapping, and preventing gaps in the film from leaking. The main body of the first breaking knife is in the shape of a triangle, the blade inclination angle of the first breaking knife is 20°, the main cutting edge is 50 mm long, the knife is 2 mm thick, and the blade surface has a smooth transition. The first breaking knife is mainly used to cut the outer bark of the rootstock, and the incision shape is a 20x20 mm square opening to expose the wood for convenient grafting. The blade surface of the first breaking knife has a smooth transition, making the blade sharper, and the back blade is convenient for chip removal. The inner radius of the connecting part is a 5 mm arc, and the outer radius is a 7 mm arc The transition makes the tool transition more natural; the second slashing knife has a quadrilateral shape, a blade inclination angle of 20°, a main cutting edge length of 60mm, a secondary cutting edge length of 5mm, and a knife thickness of 2mm. The second slashing knife is mainly suitable for thicker jujube tree openings, and the slash shape is a square opening of 30x30mm, which leaks out wood and is convenient for grafting. The secondary cutting edge is convenient for cutting into the bark, and the main cutting edge is convenient for cutting the opening shape. The tool and the connecting part are 5mm arc transitions, and the connecting part is 60mm long; the blade inclination angle of the cutting knife is 30°, the blade face width is 30mm, and the blade face width is 35mm. The cutting knife is mainly used for cutting scions. The cutting knife is similar to a rectangle, and the force is more even, which is convenient for cutting scions and exposing wood. Flat wood can increase the survival rate of grafting. Grafting requires that the scion is fully in contact with the epidermis of the rootstock, and the scion wood is fully in contact with the rootstock wood cambium. The epidermis transmits the moisture and nutrients required for the grafting site, and the wood contact facilitates better fusion of the two.

[0008] Preferably, the angle between the four guide grooves is 90°, the opening direction of the guide grooves is away from the cutter disc, the guide grooves can limit the tool to only move radially, and the shape and width of the four guide grooves correspond to the size of each tool to prevent left and right swinging.

[0009] Preferably, the outer side of the connecting shell is provided with an installation opening, and a film device is fixedly arranged in the installation opening, the film device comprises a film container and a film reel, the film reel is rotatably installed in the film container, the film reel is provided with a film for winding and protecting the grafting part, the film container is provided with a film outlet, and a row of blade teeth for cutting the film are arranged at the film outlet. The function of the film device is to wrap the film around the grafting part to protect the callus tissue after the grafting is completed, so as to ensure that the water and nutrients needed by the jujube tree are not evaporated.

[0010] Preferably, the cutter disc is provided with four columnar cutter disc fixing pins, and the four cutters are provided with L-shaped cutter fixing pins, which are connected to the corresponding cutter disc fixing pins through a reset spring, and the scraper and the cutting cutter are provided with spring notches along the moving direction of the cutter, and the cutter disc fixing pins are provided at positions corresponding to the spring notches on the cutter disc, and the cutter and the cutting cutter are provided with cutter fixing pins at the end positions of the spring notches, and the cutter disc fixing pins are fixed on one side of the first cutter and the second cutter on the cutter disc, and the cutter fixing pins are fixed on the sides of the first cutter and the second cutter, and the side of the guide groove for installing the first cutter and the second cutter is provided with a spring limiting groove to prevent the spring from shaking. When the cam ejects a cutter, the reset spring is in a compressed state, and when the servo turns again, the ejected cutter retracts into the cutter disc housing under the rebound action of the reset spring.

[0011] Preferably, the outer peripheral side of the blade disc is in nested contact with the bottom of the inner wall of the connecting shell, and the connecting shell is provided with a handle for easy hand-held carrying.

[0012] Preferably, the connection shell is wrapped around the outside of the power assembly, a battery for powering the steering gear is arranged inside the connection shell, and a charging port for charging the battery is arranged on the connection shell. The connection shell is used to protect against electric shock when using the device, and to prevent the aging of the wires to increase the service life, and to protect the transmission gear set from running in a closed space, and to prevent particles from entering the gears, causing tooth surface wear and pitting.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The invention has the advantages of simple structure, convenient operation, small size and portability, smooth knife change, and can greatly improve the working efficiency of jujube tree grafting. It has complete functions and can assist in completing the whole set of operations of jujube tree grafting, and can be promoted and used in jujube tree grafting.

[0015] 2. The present invention adopts electric drive to complete the automatic tool change process. The steering gear rotates to drive the transmission gear set to operate, thereby driving the tool holder to rotate to complete the tool change. The transmission gear set has a large reduction ratio, a small size, a compact structure, high efficiency, low power loss, more precise transmission, more stable transmission, long service life, and easy maintenance.

[0016] 3. The knife disc housing in the present invention provides a protective space for the tool, which can effectively protect the tool, prevent the tool from being exposed to the air, corroded and rusted, and has relatively high safety. The knife outlet opening is flat, so the tool can be fully extended. The steering gear protection shell can protect the steering gear and the battery, and wrap the wires inside to prevent electric shock during use. At the same time, it prevents the wires from aging and increases the service life of the tool. A film device is installed on the connecting shell to keep the moisture and nutrients required for the callus tissue from evaporating, facilitate the use of the film, reasonably optimize the structure, and make full use of the space. The device integrates multiple functions into one, which is convenient for the operator to use. It has a simple structure, is compact and light, is convenient for field use, and has complete functions, which can achieve the smooth completion of the entire grafting work.

[0017] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the connection structure of the cutter disc, the cutter group and the cam mechanism in the present invention.

[0020] Figure 3 It is a front view cross-sectional structural schematic diagram of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the power component in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the thin film device in the present invention.

[0023] Figure 6 It is a schematic diagram of the arrangement of the return spring between the cutter disc and the cutter in the present invention.

[0024] Figure 7 It is a schematic diagram of the connection structure of the return spring between the cutting knife and the cutter disc in the present invention.

[0025] Figure 8 It is a schematic diagram of the connection structure of the return spring between the second breaching knife and the knife disc in the present invention.

[0026] Description of reference numerals:

[0027] 1—cutter disc; 2—cutter disc housing; 3—connecting housing;

[0028] 4—scraper; 5—first slitting knife; 6—second slitting knife;

[0029] 7—cutting knife; 8—guide rail groove; 9—cam;

[0030] 10—connecting rod; 11—knife edge; 12—servo engine;

[0031] 13—internal gear ring; 14—first gear; 15—second gear;

[0032] 16—gear shaft; 17—third gear; 18—limiting member;

[0033] 19—film device; 20—film container; 21—film reel;

[0034] 22—tooth; 23—handle; 24—reset spring;

[0035] 25—tool fixing pin; 26—tool disc fixing pin. DETAILED DESCRIPTION

[0036] like Figures 1 to 8 As shown, the present invention comprises a tool set, a knife disc 1, a cam mechanism, a power assembly, a knife disc housing 2 and a connecting housing 3, wherein the knife disc 1 is a circular metal part, the tool set comprises four kinds of tools, namely, a scraper 4, a first slitting knife 5, a second slitting knife 6 and a cutting knife 7, four guide rail grooves 8 are equidistantly arranged on the knife disc 1, and the scraper 4, the first slitting knife 5, the second slitting knife 6 and the cutting knife 7 are slidably installed in the four guide rail grooves 8, the cam mechanism comprises a cam 9 and a connecting rod 10, and the connecting rod 10 One end of the connecting rod 10 is fixedly connected to the connecting shell 3, and the other end of the connecting rod 10 is fixedly connected to the cam 9. The connecting rod 10 passes through the hollow position of the cutter disc 1. The cam 9 and the guide rail groove 8 are at the same horizontal position. The tails of the four types of tools are in contact with the cam 9 and pressed. The cutter disc housing 2 is rotatably sleeved on the outer peripheral side of the connecting shell 3. The cutter disc housing 2 and the cutter disc 1 are connected by bolts. The cutter disc housing 2 is provided with a knife outlet 11 for extending the cutter, and the knife outlet 11 is a rectangular flat opening;

[0037] The power assembly includes a steering gear 12 and a transmission gear set. The steering gear 12 is fixedly mounted on the connecting rod 10. The transmission gear set includes an inner gear ring 13, a first gear 14, a second gear 15, a gear shaft 16 and a third gear 17. The inner gear ring 13 is fixedly connected to the cutter disc 1. The second gear 15 is fixedly connected to the third gear 17 through the gear shaft 16. The first gear 14 is arranged on the output shaft of the steering gear 12. The first gear 14 is meshed and connected with the second gear 15. The third gear 17 is meshed and connected with the inner gear ring 13. The steering gear 12 rotates to drive the transmission gear set to operate, thereby driving the cutter disc 1 to rotate. The cam 9 is fixed. When the cutter moves to the top of the cam 9, the cutter is ejected for easy use. The remaining three cutters contact the short diameter of the cam 9 and remain inside the cutter disc housing 2. When the steering gear 12 continues to rotate, the cutter disc 1 rotates again, and the next cutter is ejected. The reciprocating cycle completes the process of changing the cutter.

[0038] In this embodiment, the tails of the four types of tools that contact the cam 9 are all provided with a limit piece 18 to prevent the tools from escaping from the guide groove 8. The scraper 4 is composed of an integrally formed scraper blade, a bent body and a connector. The scraper blade is 12 mm long and 27 mm wide, and the blade inclination angle of the scraper blade is 20°. The scraper 4 is mainly used to scrape off the outer skin of perennial rootstocks, exposing the new skin for easy film coating, and preventing gaps in the film from leaking. The main body shape of the first breaking knife 5 is a triangle, the blade inclination angle of the first breaking knife 5 is 20°, the main cutting edge is 50 mm long, the knife is 2 mm thick, and the blade surface has a smooth transition. The first breaking knife 5 is mainly used to cut the outer skin of the rootstock, and the incision shape is a square opening of 20x20 mm, exposing the wood for convenient grafting. The blade surface of the first breaking knife 5 has a smooth transition, making the blade sharper, and the back blade is convenient for chip removal. The inner radius of the connecting part is a 5 mm arc, and the outer radius is 7 The second breaker knife 6 has a quadrilateral shape, a blade inclination angle of 20 °, a main cutting edge length of 60 mm, a secondary cutting blade length of 5 mm, and a knife thickness of 2 mm. The second breaker knife is mainly suitable for thicker jujube tree openings, and the square opening of the breaker shape is 30x30 mm, which leaks wood and is convenient for grafting. The secondary chip blade is convenient for cutting into the bark, and the main cutting blade is convenient for cutting the opening shape. The tool and the connecting part are 5mm arc transitions, and the connecting part is 60 mm long; the blade inclination angle of the cutting knife 7 is 30 °, the blade face width is 30 mm, and the blade face width is 35 mm. The cutting knife 7 is mainly used for cutting scions. The cutting knife 7 is similar to a rectangle, and the force is more even, which is convenient for cutting scions to expose wood. Flat wood can increase the survival rate of grafting. Grafting requires that the scion is fully contacted with the rootstock epidermis, and the scion wood is fully contacted with the rootstock wood cambium. The epidermis transmits the moisture and nutrients required for the grafting site, and the wood contact facilitates better fusion of the two.

[0039] In this embodiment, the angle between the four guide grooves 8 is 90°, and the opening direction of the guide grooves is away from the cutter disc 1. The guide grooves 8 can limit the tool to only make radial movement. The shapes and widths of the four guide grooves 8 correspond to the sizes of each tool to prevent left and right swinging. A sliding channel adapted to each tool is opened in the guide groove 8 to ensure that the tool does not shake, and the long axis end of the cam 9 is directly opposite to the cutting edge 11.

[0040] In this embodiment, the outer side of the connecting shell 3 is provided with an installation opening, and a film device 19 is fixedly arranged in the installation opening, and the film device 19 includes a film container 20 and a film reel 21, and the film reel 21 is rotatably installed in the film container 20, and a film for winding and protecting the grafting part is arranged on the film reel 21, and a film outlet is arranged on the film container 20, and a row of blade teeth 22 for cutting the film are arranged at the film outlet. The function of the film device 19 is to wrap the film around the grafting part to protect the callus tissue after the grafting is completed, so as to ensure that the water and nutrients needed by the jujube tree are not evaporated.

[0041] In this embodiment, the outer peripheral side of the blade disc 1 is in nested contact with the bottom of the inner wall of the connecting shell 3, and the connecting shell 3 is provided with a handle 23 for easy hand-holding and carrying.

[0042] In this embodiment, a cylindrical contact surface is provided on the upper end surface of the cutter disc 1, and the cylindrical contact surface is nested and rotatably connected to the inner wall of the connecting shell. Lubricating oil is applied to the cylindrical contact surface so that the cutter disc 1 can rotate freely and can be provided with certain support by the connecting shell 3 to ensure that the cutter disc 1 will not shift or fall off.

[0043] In this embodiment, four columnar knife disc fixing pins 26 are provided on the knife disc 1, and L-shaped knife fixing pins 25 are provided on each of the four knives. The knife fixing pins 25 are connected to the corresponding knife disc fixing pins 26 through a reset spring 24. Spring slots are provided on the scraper 4 and the cutting knife 7 along the tool moving direction. Knife disc fixing pins 26 are provided on the knife disc 1 at positions corresponding to the spring slots. Tool fixing pins 25 are provided on the scraper 4 and the cutting knife 7 at the end positions of the spring slots. The knife disc fixing pins 26 are fixed on one side of the first slitting knife 5 and the second slitting knife 6 on the knife disc 1. The tool fixing pins 25 are fixed on the sides of the first slitting knife 5 and the second slitting knife 6. A spring limiting groove is provided on the side of the guide groove 8 for installing the first slitting knife 5 and the second slitting knife 6 to prevent the spring from shaking. When the tool is ejected, the reset spring 24 is in the longest stretching state, and the maximum distance is limited by the tool displacement to avoid exceeding the stretching range of the spring. When the tool is retracted, the length and compression limit of the reset spring 24 itself limit the shortest distance, and the extension length of the tool is also accurately controlled. The reset structure designed in this way is simple and reasonable, can well realize the tool retraction, the spring tension is moderate, will not cause the device to deform and twist, the spring has a long life, low cost, easy assembly, stable mechanical properties, and is safe and reliable.

[0044] In this embodiment, the connection shell 3 is wrapped around the outside of the power assembly, and a battery for powering the servo 12 is arranged inside the connection shell 3, and a charging port for charging the battery is arranged on the connection shell 3. The connection shell 3 is used to protect against electric shock when using the device, and at the same time prevent the aging of the wires to increase the service life, protect the transmission gear set from running in a closed space, and prevent particles from entering the gears, causing tooth surface wear and pitting. The servo 12 is a position (angle) servo driver, suitable for control systems that require angles to change continuously and can be maintained, with good control performance, and starting, stopping, and flipping are all completed within a few pulses. When running within a certain frequency range, no step will be lost in any movement mode, with large torque, smooth start, high precision, and good tool change action.

[0045] When in use, the steering engine 12 is started to rotate the cutter disc 1. When a certain cutter rotates to the long axis end of the cam 9, it is ejected, which is convenient for the operator to take and use for the jujube tree grafting operation. The outer skin of the rootstock is scraped off by the scraper 4, and the new skin is exposed for easy film coating; the outer skin of the rootstock is cut by the first slitting knife 5 to expose the wood for easy grafting; the second slitting knife 6 is used for the thicker jujube tree opening; and the cutting knife 7 is used to cut the scion. After the grafting is completed, the film in the film device 19 is used to wrap and protect the callus tissue.

[0046] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A knife changing device for jujube tree grafting, It is characterized in that The invention comprises a tool set, a tool disc (1), a cam mechanism, a power assembly, a tool disc housing (2) and a connecting housing (3); the tool disc (1) is a circular metal part; the tool set comprises four types of tools, namely a scraper (4), a first slitting knife (5), a second slitting knife (6) and a cutting knife (7); four guide grooves (8) are equidistantly arranged on the tool disc (1); the scraper (4), the first slitting knife (5), the second slitting knife (6) and the cutting knife (7) are respectively slidably mounted in the four guide grooves (8); the cam mechanism comprises a cam (9) and a connecting rod (10); One end of the connecting rod (10) is fixedly connected to the connecting shell (3), and the other end of the connecting rod (10) is fixedly connected to the cam (9). The connecting rod (10) passes through the hollow position of the cutter disc (1). The cam (9) and the guide rail groove (8) are at the same horizontal position. The tails of the four types of cutters are in contact with the cam (9) and pressed against the cutter disc shell (2). The cutter disc shell (2) is rotatably sleeved on the outer peripheral side of the connecting shell (3). The cutter disc shell (2) and the cutter disc (1) are connected by bolts. The cutter disc shell (2) is provided with a cutter outlet (11) for extending the cutter. The power assembly comprises a steering gear (12) and a transmission gear set, wherein the steering gear (12) is fixedly mounted on the connecting rod (10), and the transmission gear set comprises an inner gear ring (13), a first gear (14), a second gear (15), a gear shaft (16) and a third gear (17), wherein the inner gear ring (13) is fixedly connected to the cutter disc (1), the second gear (15) is fixedly connected to the third gear (17) via the gear shaft (16), the first gear (14) is arranged on the output shaft of the steering gear (12), the first gear (14) is meshedly connected to the second gear (15) for transmission, and the third gear (17) is meshedly connected to the inner gear ring (13) for transmission; The tails of the four types of cutting tools that contact the cam (9) are all provided with a stopper (18) for preventing the cutting tools from falling out of the guide groove (8); the scraper (4) is composed of an integrally formed scraper blade, a bent body and a connecting body; the scraper blade is 12 mm long and 27 mm wide, and the blade inclination angle of the scraper blade is 20°; the main body shape of the first slitting knife (5) is triangular, the blade inclination angle of the first slitting knife (5) is 20°, the main cutting edge is 50 mm long, the blade thickness is 2 mm, and the blade surface has a smooth transition; the main body shape of the second slitting knife (6) is quadrilateral, the blade inclination angle is 20°, the main cutting edge is 60 mm long, the auxiliary cutting edge is 5 mm long, and the blade thickness is 2 mm; the blade inclination angle of the cutting knife (7) is 30°, the blade surface width is 30 mm, and the blade surface width is 35 mm; Four cutter head fixing pins (26) are provided on the cutter head (1), cutter fixing pins (25) are provided on each of the four cutting tools, the cutter fixing pins (25) are connected to the corresponding cutter head fixing pins (26) through return springs (24), spring notches are formed in the scraping cutter (4) and the cutting-off cutter (7) along the tool moving direction, columnar cutter head fixing pins (26) are provided on the cutter head (1) at positions corresponding to the spring notches, cutter fixing pins (25) are provided at the end positions of the spring notches of the scraping cutter (4) and the cutting-off cutter (7), cutter head fixing pins (26) are fixed on one side of the first notch cutter (5) and the second notch cutter (6) on the cutter head (1), and cutter fixing pins (25) are fixedly arranged on the sides of the first notch cutter (5) and the second notch cutter (6).

2. The tool changing device for jujube tree grafting according to claim 1, characterized in that, a film device (19) is arranged on the outer side of the connecting housing (3), the film device (19) comprises a film container (20) and a film reel (21), the film reel (21) is rotatably installed in the film container (20), a film for winding and protecting the callus is arranged on the film reel (21), a film outlet is formed in the film container (20), and a row of cutter teeth (22) for cutting the film are arranged at the film outlet.

3. The tool changing device for jujube tree grafting according to claim 1, characterized in that, the outer peripheral side of the cutter head (1) is in nested contact with the inner wall bottom of the connecting housing (3), and a handle (23) for convenient hand-held carrying is arranged on the connecting housing (3).

4. The tool changing device for jujube tree grafting according to claim 1, characterized in that, the connecting housing (3) wraps the outside of the power assembly, a storage battery for powering the steering gear (12) is arranged in the connecting housing (3), and a charging port for charging the storage battery is arranged on the connecting housing (3).

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