A seedling tray rotary seedling delivery device

Abstract

The present invention belongs to the field of agricultural machinery, and discloses a seedling tray rotary seedling delivery device, comprising: a seedling carrier frame, comprising a base and a bracket arranged on the base; a conveying mechanism, used for conveying seedling trays, comprising a plurality of sprockets respectively arranged on the brackets, two parallel single-side outer plate chains ringed at the ends of the sprockets, and a tray delivery rod between the two; the single-side outer plate chain and the tray delivery rod form an annular conveying path, and the annular conveying path comprises a first conveying section and a second conveying section, the first conveying section is inclined from high to low, and the second conveying section is a straight conveying section located at the bottom; a transmission mechanism, comprising a servo motor connected to the sprocket fixed on the base, used for driving the sprocket to rotate and thus driving the tray delivery rod to rotate; a tray protection mechanism, located in the straight conveying section and extending along the straight conveying section to the top of the sprockets at both ends, to prevent the seedling tray from falling during transmission. The seedling delivery device can not only make the hole pot and the seedling tray easier to separate, but also has the advantages of low hole pot damage and low matrix loss rate.

Description

Technical Field

[0001] The invention belongs to the field of agricultural machinery, and in particular relates to a seedling tray rotary seedling delivery device. Background Art

[0002] Transplanting is an important planting method in agricultural production and has many advantages. On the one hand, it can shorten the field growth period of crops, increase the multiple cropping index, and effectively solve the contradiction between the front and back crops in the multi-cropping planting mode; on the other hand, transplanting can prevent the impact of pests and diseases and bad weather on the growth of seedlings and ensure the quality of seedlings. In addition, transplanting is also conducive to the realization of full mechanization of agricultural production and the development of modern agriculture, thereby improving the economic benefits of agricultural production.

[0003] With the growth of demand, fully automatic transplanting machines have gradually been put into production and application. As the key equipment of the fully automatic transplanting machine, the seedling picking and delivering device has the function of automatically picking and delivering seedlings, and its operation effect has become a research hotspot. However, at this stage, there are many problems in the seedling picking and delivering links of the fully automatic transplanting machine during operation, such as serious damage to the hole pot and seedling injury due to the strong adhesion between the hole pot and the seedling tray when taking seedlings. The damage of the hole pot will lead to an increase in the loss rate of the seedling matrix, an extension of the seedling acclimatization period after planting, and failure of seedling picking, which seriously hinders the widespread application of fully automatic transplanting machines in agricultural production. Therefore, there is an urgent need for a new seedling delivery device to solve the adhesion problem between the hole pot and the seedling tray, and provide a reference for the realization of fully automatic operation of pot seedling transplanting. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings and defects mentioned in the above background technology and provide a seedling tray rotary seedling delivery device which can reduce the adhesion between the hole pot and the seedling tray, achieve low hole pot breakage and low substrate loss rate.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is: a seedling tray rotary seedling delivery device, comprising:

[0006] The seedling carrier frame comprises a base and a bracket arranged on the base;

[0007] The conveying mechanism is used to convey the seedling trays, including a plurality of sprockets respectively arranged on the bracket, two parallel single-side outer plate chains ringed on the ends of the sprockets, and a tray delivery rod arranged between the two single-side outer plate chains; the single-side outer plate chains and the tray delivery rod form an annular conveying path, and the annular conveying path includes a first conveying section and a second conveying section, the first conveying section is inclined from high to low, and the second conveying section is a straight conveying section located at the bottom, and the sprockets are arranged at both ends of the straight conveying section;

[0008] The transmission mechanism includes a servo motor fixed on the base, the servo motor is connected to the sprocket, and is used to drive the sprocket to rotate, thereby driving the two single-side outer plate chains and the disc feeding rod between the single-side outer plate chains to rotate;

[0009] The tray protection mechanism is located in the straight conveying section and extends along the straight conveying section to above the sprocket wheels at both ends to prevent the seedling tray from falling during transportation.

[0010] In one embodiment, it also includes a seedling separation guide rail, which includes a plurality of parallel and spaced seedling separation rods, and the seedling separation rods are used to separate the stems and leaves of adjacent seedlings in the seedling tray being transported.

[0011] In one embodiment, the disk protection mechanism includes a plurality of parallel and spaced disk protection rods, the seedling separation rods are in two groups, respectively connected to the two ends of the disk protection mechanism, and the spacing between adjacent seedling separation rods is greater than the spacing between adjacent disk protection rods.

[0012] In one embodiment, the seedling separation rod and the disk protection rod are designed to be integrally formed, and the seedling separation rods at both ends of the disk protection mechanism are forked into 2 or 3 rods to form the disk protection rods.

[0013] In one embodiment, among the two components of seedling rods, one component of seedling rods at the entrance end of the seedling separation guide rail is composed of a plurality of parallel polygonal brackets, which form a plurality of parallel seedling separation spaces along the extension direction of the stems and leaves of the seedlings in the seedling tray to separate the adjacent stems and leaves of the seedlings, and the other component of seedling rods is composed of a plurality of parallel straight rods; the two components of seedling rods are fixed to the brackets or base by two fixed connecting rods.

[0014] In one embodiment, it also includes a tray-out guide rail fixed on the bracket and arranged at the top of the annular conveying path, so as to convey out the empty seedling tray after the seedlings are delivered.

[0015] In one embodiment, a vibration mechanism is further included, wherein the vibration mechanism includes a vibration part, and the vibration part is located between two sprockets at the end of the straight conveying section and above the tray sending rod, and the seedling tray being conveyed is beaten by the vibration part.

[0016] In one embodiment, the vibration mechanism also includes a speed regulating motor, a large gear connected to the speed regulating motor, a small gear meshing with the large gear, a cam transmission-connected to the small gear, a connecting rod connected to the cam, and a vibration part arranged at the end of the connecting rod.

[0017] In one embodiment, the vibration part is a vibration plate.

[0018] In one embodiment, a control box is also included, and the control box is used to control the operation of the motor of the seedling tray rotary seedling delivery device.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: when the seedling tray rotary seedling delivery device of the present application is used, after the seedling tray is placed on the tray delivery rod, the servo motor is started, the servo motor moves intermittently, drives the sprocket to rotate, and drives the seedling tray to do intermittent movement through the tray delivery rod on the single-side outer plate chain. The initial position of the seedling tray is located above one of the sprockets at the end of the straight conveying section. When the seedling tray runs along the conveying mechanism (such as clockwise), when passing through the two sprockets at the end of the straight conveying section, during the two rotations at the turning point, the tray delivery rod squeezes the bottom of the seedling tray, so that the hole pot in the seedling tray is slightly deformed and not broken, and the adhesion between the hole pot and the seedling tray is greatly reduced, which is convenient for subsequent seedling removal operations. At the same time, after the seedling tray passes through the straight conveying section, the seedling tray entering the seedling picking stage moves from bottom to top, the stems and leaves of the seedlings tilt downward under the action of gravity, and the seedling picking mechanism picks the seedlings from top to bottom. Each time the seedlings are picked, the seedling picker can directly aim at the first hole pot or the stems and leaves of the seedlings in the hole pot that are transported from bottom to top of the seedling tray to pick the seedlings. The stems and leaves of the adjacent seedlings tilt away from the seedling picker. Therefore, the seedling picker will not touch the adjacent seedlings, thereby achieving accurate alignment of the seedling picking and significantly reducing damage to the seedlings. In addition, the good coordination of the seedling tray rotary seedling delivery device of the patent application with the seedling picking mechanism and the planting mechanism can reduce manual labor, realize the automation of the seedling transplanting process, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a side structural schematic diagram of a seedling tray rotary seedling delivery device according to one embodiment;

[0022] Figure 2 It is a structural schematic diagram of another side of the seedling tray rotary seedling delivery device according to one embodiment;

[0023] Figure 3 It is a schematic diagram of the structure of the seedling separation guide rail and the seedling protection mechanism of the seedling tray rotary seedling delivery device according to one embodiment;

[0024] Figure 4 The present invention is a schematic structural diagram of a vibration mechanism of a seedling tray rotary seedling delivery device according to one embodiment. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0026] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0027] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0028] See also Figure 1-4 , one embodiment of the seedling tray rotary seedling delivery device mainly includes a seedling carrier frame 2, a conveying mechanism, a transmission mechanism and a tray protection mechanism 17. Among them, the conveying mechanism is used to transport the seedling tray, including a plurality of sprockets 6 respectively arranged on the bracket, two parallel single-sided outer plate chains 7 ring-arranged at the ends of the sprockets 6, and a tray delivery rod 8 arranged between the two single-sided outer plate chains 7. The single-sided outer plate chain 7 and the tray delivery rod 8 form an annular conveying path. The annular conveying path includes a first conveying section and a second conveying section, the first conveying section is tilted from high to low, the second conveying section is a straight conveying section located at the bottom, and the two ends of the straight conveying section are provided with the sprocket 6. The transmission mechanism includes a servo motor 3 fixed on the base, the servo motor 3 is connected to the sprocket 6, and is used to drive the sprocket 6 to rotate, thereby driving the two single-sided outer plate chains 7 and the tray delivery rod 8 between the single-sided outer plate chains to rotate. The tray protection mechanism 17 is located in the straight conveying section and extends along the straight conveying section to the top of the sprockets at both ends to prevent the seedling tray from falling during transportation.

[0029] With the seedling tray rotary seedling delivery device of the present application, when the seedling tray is placed on the tray delivery rod 8, the servo motor 3 is started, the servo motor moves intermittently, drives the sprocket 6 to rotate, and drives the seedling tray to do intermittent movement through the tray delivery rod 8 on the single-side outer plate chain 7. The initial position of the seedling tray is located above one of the sprockets 6 at the end of the straight conveying section. When the seedling tray runs along the conveying mechanism (such as clockwise), when passing through the two sprockets 6 at the end of the straight conveying section, during the two rotations at the turning point, the tray delivery rod 8 squeezes the bottom of the seedling tray, so that the hole pot in the seedling tray is slightly deformed without breaking, and the adhesion between the hole pot and the seedling tray is greatly reduced, reducing the probability of the chuck phenomenon. At the same time, after the seedling tray passes through the straight conveying section, the seedling tray entering the seedling picking stage moves from bottom to top, the seedlings tilt downward under the action of gravity, and the seedling picking mechanism picks the seedlings from top to bottom. Each time the seedlings are picked, the seedling picker can directly aim at the first hole pot or the stems and leaves of the seedlings in the hole pot that are transported from bottom to top of the seedling tray to pick the seedlings. The adjacent seedlings tilt away from the seedling picker. Therefore, the seedling picker will not touch the adjacent stems and leaves of the seedlings, thereby achieving accurate alignment of the seedling picking and significantly reducing damage to the seedlings. In addition, the good coordination of the seedling tray rotary seedling delivery device of the patent application with the seedling picking mechanism and the planting mechanism can reduce manual labor, realize the automation of the seedling transplanting process, and improve production efficiency.

[0030] Specifically, in one embodiment, the main components of the above-mentioned seedling tray rotary seedling delivery device include: a control box 1, a seedling loading frame 2, a servo motor 3, a sprocket chain 4, a transmission shaft 5, a sprocket 6, a single-sided outer plate chain 7, a tray delivery rod 8, a seedling tray 9, a seedling separation guide rail 10, a speed regulating motor 11, a large gear 12, a small gear 13, a cam 14, a connecting rod 15, a vibration plate 16, a tray protection mechanism 17, and a tray outlet guide rail 18.

[0031] Specifically, the control box 1 is electrically connected to the servo motor 3 and the speed regulating motor 11, and is used to control the motor drive, start and stop, and speed regulation. The seedling carrier 2 includes a base 20 and a bracket 22 arranged on the base. Preferably, the base 20 is a steel structure, which is used to support the entire seedling tray rotary seedling delivery device. The bracket 22 is fixed on the base, and the bracket 22 is in a triangular or trapezoidal shape, which is used to support the conveying mechanism and form a circular conveying path such as a triangular or trapezoidal shape. The conveying mechanism includes a sprocket 6 respectively arranged at the end of the bracket 22, two parallel single-sided outer plate chains 7 arranged around the two ends of the sprocket 6, and a feeding rod 8 arranged between the two single-sided outer plate chains 7, and the feeding rod 8 is fixed to the single-sided outer plate chain 7. Specifically, in the present embodiment, the bracket 22 is a triangle, and the ends of the three corners of the triangle are provided with a sprocket 6. Specifically, the feeding rod 8 includes a plurality of cross bars arranged at intervals between the two parallel single-sided outer plate chains 7. When the seedling tray 9 is placed, the groove at the bottom of the seedling tray 9 is aligned with the tray delivery rod 8, and the seedling tray 9 is engaged on the tray delivery rod 8, so that it will not fall.

[0032] Furthermore, due to the situation that the seedling root and stem may be tilted during the growth of the seedling, the adjacent seedling leaves in the seedling tray 9 may touch or be close to each other. In this case, the seedlings are easily damaged during the seedling removal or seedling delivery process. To avoid this situation, a seedling separation guide 10 is also included. The seedling separation guide 10 includes a plurality of parallel and spaced seedling separation rods 110, which are used to separate adjacent seedlings in the seedling tray being transmitted. The tray protection mechanism 17 includes a plurality of parallel and spaced protection rods, which are located between the two sprocket wheels 6 at the end of the linear conveying section and extend above the two sprocket wheels 6 at the end of the linear conveying section. Specifically, the spacing between adjacent seedling separation rods 110 is greater than the spacing between adjacent protection rods. The spacing between adjacent seedling separation rods 110 is approximately the width of a hole pot in the seedling tray 9. The spacing of the protection rods is less than the spacing between adjacent hole pots, thereby preventing the seedling tray from falling during the transmission of the linear transmission section. The spacing between adjacent tray guard rods is smaller than the width of a hole pot, so that when the seedling tray 9 moves along the conveying path to the straight conveying section, the seedling tray 9 will not fall. The tray exit guide rail 18 is fixed on the bracket 22 and is arranged at the top of the annular conveying path, and is used to convey the empty seedling tray after the seedlings are delivered. The tray exit guide rail 18 includes a plurality of parallel guide rails.

[0033] In one embodiment, there are two groups of seedling rods 110, which are respectively connected to the two ends of the disc protection mechanism 17, and the two groups of seedling rods 110 are fixed to the bracket or base by two fixed connecting rods 120. In the two groups of seedling rods 110, one group of seedling rods 110 at the entrance end of the seedling guide rail 10 is composed of a plurality of parallel polygonal brackets, and the polygonal bracket forms a plurality of parallel seedling spaces along the extension direction of the stems and leaves of the seedlings in the seedling tray, which is used to separate the stems and leaves of the adjacent seedlings, and the other group of seedling rods 110 is composed of a plurality of parallel straight rods. In one embodiment, the seedling rod 110 is a triangular or T-shaped polygonal bracket, and is fixed to the bracket 22 or the base 20 by one of the fixed connecting rods 120. Preferably, in one embodiment, the seedling rod 110 and the disc protection rod are integrally designed, and the seedling rods 110 at the two ends of the disc protection mechanism 17 are bifurcated into 2 or 3 rods to form a disc protection rod. The seedling guide rail 10 and the disc protection mechanism are integrally designed and U-shaped. Preferably, both ends of the seedling separation guide rail 10 are fixed to the bracket 22 by two fixed connecting rods 120, so that the structure is simple and the stability is good.

[0034] The transmission mechanism includes a servo motor 3 fixed on a base 20, a sprocket 6 connected to the servo motor 3, and the sprockets 6 are connected through a sprocket chain 4 and a transmission shaft 5. The sprocket 6 includes a plurality of groups of sprockets of different sizes. For example, the sprocket 6 may include a first sprocket, a second sprocket, and a third sprocket of different sizes, and the sprocket may also include a first sprocket and a second sprocket of different sizes. Specifically, in one embodiment, the servo motor 3 is connected to the sprocket 6 (only one of the sprockets is marked, and the other sprockets are not marked) through the sprocket chain 4 and the transmission shaft 5. After the servo motor 3 is started, the sprocket 6 is driven to rotate, thereby driving the two single-sided outer plate chains 7 and the disc feeding rod 8 between the single-sided outer plate chains 7 to rotate.

[0035] Furthermore, the seedling tray rotary seedling delivery device also includes a vibration mechanism, which includes a vibration part, which is located between the two sprockets 6 at the end of the linear conveying section and above the tray delivery rod 8. The seedling tray 9 in transmission is slapped by the vibration part, and the bottom of the seedling tray 9 is slapped by high-frequency intermittent up and down motion, which can reduce the adhesion of the matrix of the seedling tray 9 to the inner wall of the seedling tray 9, prepare for subsequent seedling removal, achieve better removal of seedlings and reduce seedling damage. In one embodiment, the vibration part can be a vibration plate, which adopts a vibration plate structure, which is simple to manufacture and can better transmit the vibration force to each hole pot in the seedling tray, so as to achieve better separation of the matrix from the hole pot body.

[0036] Specifically, the vibration mechanism mainly includes a speed regulating motor 11, a large gear 12 connected to the speed regulating motor, a small gear 13 meshing with the large gear 12, a cam 14 connected to the small gear 13 through a transmission rod, a connecting rod 15 connected to the cam 14, and a vibration plate arranged at the bottom of the connecting rod 15. The speed of the speed regulating motor 11 is amplified by the large gear 12 and the small gear 13 to the cam 14, that is, the speed is increased by the large and small gears. The cam 14 drives the connecting rod 15 to move up and down through friction, so that the connecting rod 15 and the vibration plate 16 can achieve high-frequency up and down intermittent movement. The vibration plate 16 beats the bottom of the seedling tray 9 through high-frequency intermittent up and down movement, which can reduce the adhesion of the seedling tray 9 matrix to the inner wall of the seedling tray 9, and prepare for subsequent seedling removal.

[0037] Working principle: After the control box 1 is powered on, the seedling tray 9 is placed on the tray delivery rod 8, and the groove at the bottom of the seedling tray 9 is aligned with the tray delivery rod 8. At the same time, the tray delivery rod 8 is fixed to the single-sided outer plate chain 7, and the sprocket 6 is driven to rotate by the servo motor 3, so that the tray delivery rod 8 fixed to the single-sided outer plate chain 7 drives the seedling tray 9 to do intermittent movement. When the tray delivery rod 8 drives the seedling tray 9 to move to the entrance position of the seedling separation guide rail 10, the seedling separation guide rail 10 uses the seedling separation rod 110 to separate the seedlings, and the seedling tray 9 moves closely following the tray delivery rod 8 to ensure that the movement path of the seedling tray 9 is correct. When the seedling tray 9 passes the end of the straight conveying section, the seedling tray is prevented from falling by the tray protection mechanism 17, and the bottom of the seedling tray is slapped by the vibration mechanism to reduce the adhesion of the seedling tray matrix to the inner wall of the seedling tray. After turning, it reaches the exit position near the seedling separation guide rail 10, and the seedling removal device takes out the seedlings and seedling matrix in the seedling tray 9 in turn. After the seedlings and seedling matrix of the seedling tray are all taken out, the empty seedling tray 9 moves to the top of the seedling carrying frame together with the tray sending rod 8 until the empty seedling tray 9 is transmitted along the tray outlet guide rail 18.

[0038] In the seedling tray rotary seedling feeding device of the present application, when the seedling tray is placed on the tray feeding rod 8, the servo motor 3 is started, the servo motor 3 moves intermittently, drives the sprocket 6 to rotate, and drives the seedling tray to do intermittent movement through the tray feeding rod on the single-side outer plate chain 7. The initial position of the seedling tray is above the sprocket wheel 6 at the end of the straight conveying section. When the seedling tray runs along the conveying mechanism (clockwise or counterclockwise), when passing through the two sprocket wheels 6 at the end of the straight conveying section, during the two rotations at the turning point, the tray feeding rod squeezes the bottom of the seedling tray, so that the hole pot in the seedling tray is slightly deformed and not broken, and the adhesion between the hole pot and the seedling tray is greatly reduced, making the hole pot and the seedling tray easier to separate, and having the advantages of low hole pot damage and low matrix loss rate; at the same time, when the seedling tray moves from bottom to top in the seedling picking stage after the straight conveying section, the seedling tilts downward under the action of gravity, and the seedling picking mechanism picks up the seedlings from top to bottom. Each time the seedling is picked up, the seedling picker can directly aim at the first hole pot or the seedling stems and leaves in the hole pot conveyed from bottom to top of the seedling tray to pick up the seedlings, and the adjacent seedlings are inclined away from the seedling picker. Therefore, the seedling picker will not touch the adjacent seedling stems and leaves, thereby achieving accurate alignment of the seedling picking and significantly reducing the damage to the seedling. In the prior art, in the commonly used translational transport, the holes of the seedling tray are located on the same straight line, and the gap between adjacent seedlings is small, which makes it easy to damage the seedlings when taking them out. In the top-down inclined transport, when taking seedlings, the seedlings are taken out from the lowest position (seedling delivery outlet position), and the seedlings of adjacent seedling trays will tilt toward the seedling taker, which also easily damages the seedlings. The technical solution of the present application can solve this technical problem. Furthermore, the vibration mechanism beats the bottom of the seedling tray through high-frequency intermittent up and down motion, which can reduce the adhesion of the seedling tray matrix to the inner wall of the seedling tray, prepare for subsequent seedling removal, and significantly improve the success rate of seedling removal and the integrity of the hole. In addition, the good coordination of the seedling tray rotary seedling delivery device of the present patent application with the seedling taking mechanism and the planting mechanism can reduce manual labor, realize the automation of the seedling transplanting process, and improve production efficiency.

Claims

1. A seedling tray rotary seedling delivery device, characterized in that: include: The seedling carrier frame comprises a base and a bracket arranged on the base; The conveying mechanism is used to convey the seedling trays, including a plurality of sprockets respectively arranged on the bracket, two parallel single-side outer plate chains ringed on the ends of the sprockets, and a tray delivery rod arranged between the two single-side outer plate chains; the single-side outer plate chains and the tray delivery rod form an annular conveying path, and the annular conveying path includes a first conveying section and a second conveying section, the first conveying section is inclined from high to low, and the second conveying section is a straight conveying section located at the bottom, and the sprockets are arranged at both ends of the straight conveying section; The transmission mechanism includes a servo motor fixed on the base, the servo motor is connected to the sprocket, and is used to drive the sprocket to rotate, thereby driving the two single-side outer plate chains and the disc feeding rod between the single-side outer plate chains to rotate; The tray protection mechanism is located in the straight conveying section and extends along the straight conveying section to above the sprockets at both ends to prevent the seedling tray from falling during transportation; It also includes a seedling separation guide rail, which includes a plurality of parallel and spaced seedling separation rods, and the seedling separation rods are used to separate the stems and leaves of adjacent seedlings in the seedling tray being transported; The disc protection mechanism comprises a plurality of disc protection rods arranged in parallel and at intervals, the seedling separation rods have two groups, which are respectively connected to the two ends of the disc protection mechanism, and the spacing between adjacent seedling separation rods is greater than the spacing between adjacent disc protection rods; Among the two groups of seedling rods, one group of seedling rods at the entrance end of the seedling separation guide rail is composed of a plurality of parallel polygonal brackets, which form a plurality of parallel seedling separation spaces along the extension direction of the stems and leaves of the seedlings in the seedling tray to separate the adjacent stems and leaves of the seedlings, and the other group of seedling rods is composed of a plurality of parallel straight rods; the two groups of seedling rods are fixed to the brackets or base by two fixed connecting rods.

2. The seedling tray rotary seedling delivery device according to claim 1, characterized in that: The seedling separation rod and the disk protection rod are designed to be integrally formed, and the seedling separation rods at both ends of the disk protection mechanism are forked into two or three rods to form the disk protection rod.

3. The seedling tray rotary seedling delivery device according to claim 1, characterized in that: It also includes a tray-out guide rail fixed on the bracket and arranged at the top of the annular conveying path, and is used for conveying out the empty seedling tray after the seedlings are delivered.

4. The seedling tray rotary seedling delivery device according to claim 1, characterized in that: It also includes a vibration mechanism, which includes a vibration part. The vibration part is located between two sprockets at the end of the straight conveying section and above the tray sending rod. The seedling tray being conveyed is beaten by the vibration part.

5. The seedling tray rotary seedling delivery device according to claim 4, characterized in that: The vibration mechanism also includes a speed regulating motor, a large gear connected to the speed regulating motor, a small gear meshing with the large gear, a cam drivingly connected to the small gear, a connecting rod connected to the cam, and a vibration part arranged at the end of the connecting rod.

6. The seedling tray rotary seedling delivery device according to claim 4 or 5, characterized in that: The vibration part is a vibration plate.

7. The seedling tray rotary seedling delivery device according to claim 1, characterized in that: The utility model also comprises a control box, which is used for controlling the operation of the motor of the seedling tray rotary seedling delivery device.

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