CN218977271U

CN218977271U - Seedling plug-in device

Info

Publication number: CN218977271U
Application number: CN202223568700.XU
Authority: CN
Inventors: 高健博; 何晓龙; 郑超; 杨秋男; 吴耀文; 王剑
Original assignee: Zhuofei Dongying Agricultural Science and Technology Research Institute Co Ltd
Current assignee: Zhuofei Dongying Agricultural Science and Technology Research Institute Co Ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-09
Anticipated expiration: 2032-12-22

Abstract

The utility model relates to the technical field of agricultural machinery and discloses a seedling tray throwing device which comprises a frame, wherein a conveying mechanism is arranged on the frame, a seedling conveying conveyor belt is arranged at the bottom of the conveying mechanism, the discharge end of the conveying mechanism is positioned right above the feed end of the seedling conveying conveyor belt, the conveying mechanism comprises a left conveying component and a right conveying component, the left conveying component and the right conveying component are respectively arranged on the frames on two sides of the seedling conveying conveyor belt, a driving mechanism is arranged at the top end of the frame and used for driving the left conveying component and the right conveying component to synchronously lift and move along the vertical direction, a plurality of conveying rods are arranged on the left conveying component and the right conveying component at intervals along the vertical direction, and the conveying rods are used for supporting and conveying seedling trays. The seedling tray throwing device can realize automatic conveying and throwing of the seedling tray, does not need to manually place the seedling tray on the seedling conveying belt, reduces labor intensity and improves working efficiency.

Description

Seedling plug-in device

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to a seedling plug throwing device.

Background

The seedling raising and transplanting are to raise seedling in greenhouse in advance, and this can avoid natural factors of low temperature, frost, etc. effectively, raise seedling survival rate, utilize photo-thermal resource fully, make crop mature in advance and raise crop yield obviously. At present, the plug seedling transplanting operation is still in a semi-automatic stage, the placement of the seedling tray needs to be completed manually, the seedlings are taken from the plug tray and put into a planter or a seedling separating cup of a transplanter, the labor intensity is high, and the operation efficiency is low.

The utility model patent of China with the prior authorized bulletin number of CN211881028U discloses a seedling tray conveying device of a plug seedling transplanting machine, which comprises a power transmission mechanism and a seedling tray fixing mechanism, wherein the power transmission mechanism mainly comprises a frame, side plates, chain wheels, chain wheel shafts, bearings, special-shaped chains, a servo motor and a transmission shaft, and the seedling tray fixing mechanism mainly comprises a supporting plate, a seedling pressing plate mounting plate, round steel, a blocking piece and a proximity switch. The servo motor drives the chain wheel to rotate, the seedling tray is driven to move towards the seedling taking point, the baffle sheet touches the proximity switch, the servo motor stops rotating, and the empty seedling tray is recovered after seedling taking is completed.

Although the seedling tray conveying device disclosed in the prior art realizes seedling tray conveying through chain transmission, the seedling tray conveying device is matched with an automatic seedling taking device for use, and automation of plug seedling transplanting is realized. However, when the next seedling tray needs to be replaced after the seedling in one seedling tray is completely picked, the next seedling tray still needs to be manually carried and placed on the conveying belt, so that the seedling tray placing efficiency is lower; in addition, the seedling tray is provided with seedlings, and has a certain weight, when the area of the seedling tray is large, two workers are usually required to cooperate to carry and place the seedling tray on the conveyor belt, so that the operation is inconvenient, and the labor intensity of the workers is increased.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a seedling tray throwing device which can realize automatic conveying and throwing of seedling trays without manually placing the seedling trays on a seedling conveying belt, thereby reducing the labor intensity and improving the working efficiency.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides a seedling plug put in device, includes the frame, be equipped with conveying mechanism in the frame along vertical direction, the conveying mechanism bottom is equipped with and send seedling conveyer belt, conveying mechanism's discharge end is located send seedling conveyer belt feed end directly over, conveying mechanism includes left conveying component and right conveying component, left conveying component with right conveying component sets up respectively send seedling conveyer belt both sides in the frame, the frame top is equipped with actuating mechanism, actuating mechanism is used for the drive left conveying component with right conveying component follows vertical direction synchronous elevating movement, left conveying component with all be equipped with a plurality of transfer bars along vertical direction interval on the right conveying component, the transfer bar is used for supporting and carries seedling plug.

The utility model is further provided with: the left conveying assembly and the right conveying assembly are identical in structure and comprise an upper driving shaft and a lower driving shaft, the upper driving shaft and the lower driving shaft are located in the same vertical plane and are rotationally connected with the frame, the upper driving shaft and the lower driving shaft are arranged in parallel with the conveying direction of the seedling conveying conveyor belt, an upper chain wheel I and an upper chain wheel II are respectively sleeved and fixed at two ends of the upper driving shaft, a lower chain wheel I and a lower chain wheel II are respectively sleeved and fixed at two ends of the lower driving shaft, a conveying chain I is sleeved and arranged between the upper chain wheel I and the lower chain wheel I, a conveying chain II is sleeved and arranged between the upper chain wheel II, the conveying chain I and the conveying chain II are parallel to each other, a plurality of conveying rods are arranged between the conveying chain I and the conveying chain II, one ends of the conveying rods are connected onto the conveying chain I, and the other ends of the conveying rods are connected onto the conveying chain II.

The utility model is further provided with: the transmission rod comprises a connecting part and a supporting part which are integrally formed, wherein the connecting parts are provided with two connecting parts and are respectively located at two ends of the supporting part, the connecting parts are bent at the connecting parts of the connecting parts and the supporting parts, and the two connecting parts are respectively welded and fixed with the first conveying chain and the second conveying chain.

The utility model is further provided with: the driving mechanism comprises a driving motor, a driving gear, a driven gear and a rotating shaft, wherein the driving motor is fixed at the top end of the frame, an output shaft of the driving motor is connected with one end of an upper driving shaft of the left conveying assembly, the driving gear is sleeved and fixed on the upper driving shaft of the left conveying assembly, one end of the rotating shaft is rotationally connected with the frame, the driven gear is sleeved and fixed at the other end of the rotating shaft, the driven gear is meshed with the driving gear, and the rotating shaft is in transmission connection with the upper driving shaft of the right conveying assembly through a synchronous belt assembly.

The utility model is further provided with: the discharging end of the conveying mechanism is provided with a guiding mechanism, the guiding mechanism is positioned between the left conveying assembly and the right conveying assembly, and the guiding mechanism is used for guiding the seedling tray to slide onto the seedling conveying conveyor belt.

The utility model is further provided with: the guide mechanism comprises a guide rod, a support rod and a support plate, wherein the guide rod is arranged along the conveying direction of the seedling conveying belt, the guide rod is in a mountain shape, the opening end of the guide rod faces the discharging end of the seedling conveying belt, the closed end of the guide rod is hinged to the support rod, one end of the support rod is fixed on the support plate, and the support plate is fixedly connected with the frame.

The utility model is further provided with: the support rod is sleeved with a movable sleeve, a connecting plate is arranged above the movable sleeve, the closed end of the guide rod is fixedly connected with the movable sleeve and the connecting plate respectively, the section of the connecting plate is L-shaped, the vertical part of the connecting plate is fixedly welded with the outer wall of the movable sleeve, a through hole is formed in the horizontal part of the connecting plate, a torsion spring is sleeved on the outer wall of the movable sleeve, one end of the torsion spring penetrates through the through hole, and the other end of the torsion spring penetrates through the support plate and is fixedly connected with the support plate.

The utility model is further provided with: an electromagnet is arranged below the horizontal part of the connecting plate and fixed on the supporting plate.

The beneficial effects of the utility model are as follows:

1. the seedling tray throwing device can realize automatic conveying and throwing of seedling trays, does not need manual conveying to place the seedling trays on a seedling conveying belt, greatly reduces labor intensity of workers, improves working efficiency, can carry 6 72 seedling trays at one time, enables a transplanter to complete 432 pot seedling transplanting work at one time, and realizes unmanned throwing of the seedling trays.

2. According to the seedling tray throwing device, the guiding mechanism is arranged, so that the seedling tray can be guided to slide onto the seedling conveying belt smoothly, adverse effects on pot seedlings planted in the seedling tray when the seedling tray directly falls onto the seedling conveying belt from the conveying rod are avoided, and smooth and stable throwing process of the seedling tray is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a seedling tray delivery device of the utility model;

FIG. 2 is a schematic diagram of the front view structure of a seedling tray throwing device;

FIG. 3 is a schematic side view of a seedling tray delivery device of the present utility model;

FIG. 4 is a schematic view of the structure of a frame and a conveying mechanism of the seedling tray throwing device;

FIG. 5 is an enlarged partial schematic view at A in FIG. 4;

FIG. 6 is a schematic view showing the bottom view of a seedling tray feeding device of the present utility model with the seedling tray and the seedling feeding conveyor belt removed;

FIG. 7 is a schematic structural view of a guide mechanism of the seedling tray throwing device;

FIG. 8 is another schematic structural view of a guide mechanism of a seedling tray feeding device according to the present utility model

FIG. 9 is a schematic view showing a seedling tray sliding state structure of a seedling tray throwing device of the utility model;

fig. 10 is a schematic view of a seedling tray structure of the present utility model.

In the figure, 1, a rack; 2. a seedling conveying belt; 3. a left transport assembly; 4. a right conveying assembly; 5. a driving mechanism; 6. a transmission rod, 6a, a connection part, 6b, and a support part; 7. an upper drive shaft; 8. a lower drive shaft; 9. an upper chain wheel I; 10. an upper chain wheel II; 11. a lower chain wheel I; 12. a lower chain wheel II; 13. a first conveying chain; 14. a second conveying chain; 15. a driving motor; 16. a drive gear; 17. a driven gear; 18. a rotating shaft; 19. a timing belt assembly; 20. a guide mechanism; 21. a guide rod; 22. a support rod; 23. a support plate; 24. a movable sleeve; 25. a connecting plate; 26. a through hole; 27. a torsion spring; 28. an electromagnet; 29. seedling tray.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

Referring to fig. 1, fig. 2 and fig. 3, a seedling plug 29 throwing device comprises a frame 1, a conveying mechanism is arranged on the frame 1 along the vertical direction, a seedling conveying belt 2 is arranged at the bottom of the conveying mechanism, the discharging end of the conveying mechanism is located right above the feeding end of the seedling conveying belt 2, the conveying mechanism comprises a left conveying component 3 and a right conveying component 4, the left conveying component 3 and the right conveying component 4 are respectively arranged on the frame 1 on two sides of the seedling conveying belt 2, a driving mechanism 5 is arranged at the top end of the frame 1, the driving mechanism 5 is used for driving the left conveying component 3 and the right conveying component 4 to synchronously lift along the vertical direction, a plurality of conveying rods 6 are arranged on the left conveying component 3 and the right conveying component 4 along the vertical direction at intervals, and the conveying rods 6 are used for supporting and conveying the seedling plug 29. It should be noted that, a plurality of seedling holes (as shown in fig. 10) with top ends connected to each other and arranged in a matrix are provided on the seedling hole tray 29, when the seedling hole tray 29 is conveyed by the conveying mechanism, the seedling hole tray 29 is placed on two opposite conveying rods 6 of the left conveying assembly 3 and the right conveying assembly 4, so that bottoms of two adjacent rows of seedling holes are inserted on the conveying rods 6, and thus, the seedling hole tray 29 is supported and fixed.

When the seedling tray 29 throwing device is used, a plurality of seedling trays 29 planted with pot seedlings can be placed on a transmission rod 6 between a left conveying assembly 3 and a right conveying assembly 4 along the vertical direction before the transplanting operation starts, after the throwing device starts to operate, the left conveying assembly 3 and the right conveying assembly 4 are driven by a driving mechanism 5 to convey the seedling tray 29 downwards, so that the seedling tray 29 slides onto a seedling conveying belt 2 from the discharge end of the conveying mechanism, the seedling tray 29 is conveyed to a seedling taking and throwing device through the seedling conveying belt 2, the seedling taking and throwing device is used for taking and throwing seedlings, and the automatic operation of pot seedling transplanting is realized. When the seedlings in one seedling tray 29 are picked, the driving mechanism 5 is started again, the next seedling tray 29 is conveyed to the seedling conveying belt 2 through the conveying mechanism, the seedling tray 29 is placed on the seedling conveying belt 2 without manual conveying, the labor intensity of workers is greatly reduced, the placing efficiency of the seedling tray 29 is improved, and the seedling tray 29 throwing device can carry 6 72 seedling trays 29 at one time, so that the transplanting machine can finish 432 pot seedling transplanting works at one time. Preferably, the lower part of the frame 1 is provided with supporting legs, universal casters can be arranged at the bottoms of the supporting legs, when all the seedling trays 29 carried on the frame 1 are put in, the frame 1 can be moved to return to the seedling supplementing position, the seedling trays 29 are restored to the seedling conveying belt 2 for continuous operation after being supplemented, normal operation of the transplanting machine is not affected, in addition, in the long-time operation process of the transplanting machine, the seedling trays 29 are not required to be put manually and frequently, and the operation efficiency is improved.

Referring to fig. 2 and 4, the left conveying component 3 and the right conveying component 4 have the same structure and comprise an upper driving shaft 7 and a lower driving shaft 8, the upper driving shaft 7 and the lower driving shaft 8 are located in the same vertical plane and are rotationally connected with the frame 1, the upper driving shaft 7 and the lower driving shaft 8 are arranged in parallel with the conveying direction of the seedling conveying belt 2, an upper chain wheel I9 and an upper chain wheel II 10 are respectively sleeved and fixed at two ends of the upper driving shaft 7, a lower chain wheel I11 and a lower chain wheel II 12 are respectively sleeved and fixed at two ends of the lower driving shaft 8, a conveying chain I13 is sleeved and arranged between the upper chain wheel I9 and the lower chain wheel I11, a conveying chain II 14 is sleeved and arranged between the upper chain wheel II 10 and the lower chain wheel II 12, the conveying chain I13 and the conveying chain II 14 are mutually parallel, a plurality of conveying rods 6 are arranged between the conveying chain I13 and the conveying chain II 14, one ends of the conveying rods 6 are connected to the conveying chain I13, and the other ends of the conveying rods 6 are connected to the conveying chain II 14. The transmission rod 6 includes integrated into one piece's connecting portion 6a and supporting part 6b, connecting portion 6a is equipped with two and is located the both ends of supporting part 6b respectively, connecting portion 6a and the junction kink setting of supporting part 6b, two connecting portion 6a respectively with carry chain one 13 and carry chain two 14 welded fastening, the setting of supporting part 6b can provide stable supporting role to seedling cave dish 29, the setting of connecting portion 6a, make the transmission rod 6 and carry chain one 13, carry chain two 14 be connected more firmly stable, make seedling cave dish 29 place on transmission rod 6 simultaneously after, leave certain clearance with carry chain one 13 and carry chain two 14, the transportation of seedling cave dish 29 of being convenient for, the seedling cave dish 29 of being convenient for simultaneously slides to send on the seedling conveyer belt 2.

Referring to fig. 5 and 6, the driving mechanism 5 includes a driving motor 15, a driving gear 16, a driven gear 17 and a rotating shaft 18, the driving motor 15 is fixed at the top end of the frame 1, an output shaft of the driving motor 15 is connected with one end of an upper driving shaft 7 of the left conveying assembly 3, the driving gear 16 is sleeved and fixed on the upper driving shaft 7 of the left conveying assembly 3, one end of the rotating shaft 18 is rotationally connected with the frame 1, the driven gear 17 is sleeved and fixed at the other end of the rotating shaft 18, the driven gear 17 is meshed with the driving gear 16, the rotating shaft 18 is in transmission connection with the upper driving shaft 7 of the right conveying assembly 4 through a synchronous belt assembly 19, the synchronous belt assembly 19 includes a belt and two belt pulleys, the two belt pulleys are respectively sleeved and fixed on the rotating shaft 18 and the upper driving shaft 7 of the right conveying assembly 4, and the belt is sleeved and arranged on the two belt pulleys to realize synchronous rotation of the rotating shaft 18 and the upper driving shaft 7. When the seedling tray 29 is conveyed, the driving motor 15 is started to drive the upper driving shaft 7 of the left conveying assembly 3 to rotate, and the upper driving shaft 7 drives the lower driving shaft 8 to synchronously rotate through a chain wheel and chain transmission structure of the upper chain wheel 9, the upper chain wheel 10, the conveying chain 13, the conveying chain 14, the lower chain wheel 11 and the lower chain wheel 12, so that the circulating rotation of the left conveying assembly 3 is realized; meanwhile, the upper driving shaft 7 of the left conveying assembly 3 drives the rotating shaft 18 to rotate through the driving gear 16 and the driven gear 17, the rotating shaft 18 drives the right conveying assembly 4 to synchronously rotate through the synchronous belt assembly 19, and finally, the left conveying assembly 3 and the right conveying assembly 4 synchronously rotate and rotate in opposite directions, as indicated by arrows in fig. 3, so that the seedling hole trays 29 placed on the conveying rods 6 can be conveniently conveyed downwards to the seedling conveying conveyor belt 2.

Referring to fig. 6, a guiding mechanism 20 is arranged at the discharging end of the conveying mechanism, the guiding mechanism 20 is positioned between the left conveying component 3 and the right conveying component 4, and the guiding mechanism 20 is used for guiding seedling trays 29 to slide onto the seedling conveying conveyor belt 2. The guiding mechanism 20 can enable the seedling tray 29 to slide onto the seedling conveying belt 2 smoothly, and prevent the seedling tray 29 from directly falling onto the seedling conveying belt 2 from the transmission rod 6, so that adverse effects are caused on pot seedlings planted in the seedling tray 29.

Referring to fig. 6 and 7, the guide mechanism 20 includes a guide rod 21, a support rod 22 and a support plate 23, the guide rod 21 is arranged along the conveying direction of the seedling conveying belt 2, the guide rod 21 is in a shape of a Chinese character 'shan', the opening end of the guide rod 21 faces the discharging end of the seedling conveying belt 2, the closed end of the guide rod 21 is hinged with the support rod 22, one end of the support rod 22 is fixed on the support plate 23, and the support plate 23 is fixedly connected with the frame 1. The distance between the rods of the guide rod 21 is matched with the distance between the seedling holes at the bottom of the seedling tray 29, so that the seedling tray 29 can smoothly and stably fall on the guide rod 21 along with the conveying of the conveying mechanism, one end of the seedling tray 29 is inclined under the guiding action of the guide rod 21, the seedling tray 29 is driven to slowly slide off the guide rod 21 through the movement of the seedling conveying belt 2, and finally, the seedling tray 29 is completely and horizontally fallen onto the seedling conveying belt 2, so that the seedling tray 29 is put in.

Referring to fig. 8, a movable sleeve 24 is sleeved on a supporting rod 22, a connecting plate 25 is arranged above the movable sleeve 24, the closed end of a guide rod 21 is fixedly connected with the movable sleeve 24 and the connecting plate 25 respectively, the cross section of the connecting plate 25 is L-shaped, the vertical part of the connecting plate 25 is fixedly welded with the outer wall of the movable sleeve 24, a through hole 26 is formed in the horizontal part of the connecting plate 25, a torsion spring 27 is sleeved on the outer wall of the movable sleeve 24, one end of the torsion spring 27 penetrates through the through hole 26, the other end of the torsion spring 27 penetrates through the supporting plate 23 and is fixedly connected with the supporting plate 23, and after a seedling tray 29 slides from the guide rod 21, the guide rod 21 can be smoothly reset under the action of the torsion spring 27 so as to carry out next seedling tray 29 throwing. Preferably, an electromagnet 28 is arranged below the horizontal part of the connecting plate 25, the electromagnet 28 is fixed on the supporting plate 23, the electromagnet 28 is used for locking the guide rod 21, and the guide rod 21 can provide a stable supporting effect for the seedling tray 29 when the seedling tray 29 is not required to be put in.

Working principle: when the dispensing device starts to operate, the electromagnet 28 is magnetic, so that the guide rod 21 is locked and cannot rotate. The driving motor 15 is started to drive the upper driving shaft 7 of the left conveying assembly 3 to rotate, the upper driving shaft 7 transmits power to the driven gear 17 through the driving gear 16, the driven gear 17 transmits power to the upper driving shaft 7 of the right conveying assembly 4 through the synchronous belt assembly 19, the left conveying assembly 3 and the right conveying assembly 4 rotate simultaneously and reversely, the conveying chains are driven to rotate synchronously, and the conveying rods 6 are welded at joints of the conveying chains, so that the conveying rods 6 start to move downwards along with the chains, and the seedling hole trays 29 are hung on the conveying rods 6 and descend along with the conveying rods 6 synchronously. When the seedling tray 29 descends to the position of the guide rod 21, the seedling tray 29 is blocked at the position of the guide rod 21 by the guide rod 21, at the moment, the transmission rod 6 continues to rotate along with the conveying mechanism for a small distance to the lowest point of the conveying chain, the seedling tray 29 can be ensured not to touch the transmission rod 6 in the falling process, at the moment, the electromagnet 28 is controlled to demagnetize, the guide rod 21 rotates downwards because of the weight of the seedling tray 29, when the guide rod 21 and the seedling tray 29 rotate to the position shown in fig. 9, the seedling conveying belt 2 is started, the seedling conveying belt 2 moves along the direction shown by an arrow in fig. 9, the seedling tray 29 is driven to slide from the guide rod 21 when the seedling conveying belt 2 moves, and after the seedling tray 29 completely and flatly falls onto the seedling conveying belt 2, the guide rod 21 is rebounded to the initial position under the action of the torsion spring 27, at the moment, the electromagnet 28 returns to the magnetism to lock the guide rod 21. When the next seedling tray 29 needs to be replaced after the seedlings in one seedling tray 29 are picked, the driving motor 155 is started again to start operation, the steps are circulated, and the next seedling tray 29 throwing is completed.

Claims

1. Seedling cave dish input device, its characterized in that: including frame (1), be equipped with conveying mechanism along vertical direction on frame (1), conveying mechanism bottom is equipped with and send seedling conveyer belt (2), conveying mechanism's discharge end is located send seedling conveyer belt (2) feed end directly over, conveying mechanism includes left conveying component (3) and right conveying component (4), left conveying component (3) with right conveying component (4) set up respectively send seedling conveyer belt (2) both sides on frame (1), frame (1) top is equipped with actuating mechanism (5), actuating mechanism (5) are used for the drive left conveying component (3) with right conveying component (4) follow vertical direction synchronous lifting movement, left side conveying component (3) with all be equipped with a plurality of transfer bars (6) along vertical direction interval on right conveying component (4), transfer bar (6) are used for supporting and carry seedling cave dish (29).

2. The seedling tray delivery device according to claim 1, wherein: left side conveying component (3) with right side conveying component (4) structure is the same, all includes drive shaft (7) and lower drive shaft (8), go up drive shaft (7) with drive shaft (8) down are located same vertical plane and all with frame (1) rotation is connected, go up drive shaft (7) with drive shaft (8) down all with the direction of delivery parallel arrangement who send seedling conveyer belt (2), go up drive shaft (7) both ends cover respectively and establish respectively and be fixed with sprocket one (9) and last sprocket two (10), the both ends cover of drive shaft (8) down are established respectively and are fixed with sprocket one (11) down and sprocket two (12) down, go up sprocket one (9) with cover down between sprocket one (11) is equipped with conveyor chain one (13), go up sprocket two (10) with cover down between sprocket two (12) is equipped with conveyor chain two (14), conveyor chain one (13) with conveyor chain two (14) are parallel to each other, conveyor chain (6) are equipped with conveyor chain (6) one end is connected on conveyor chain (6).

3. The seedling tray feeding device according to claim 2, wherein: the transmission rod (6) comprises a connecting portion (6 a) and a supporting portion (6 b) which are integrally formed, the connecting portion (6 a) is provided with two connecting portions and is located at two ends of the supporting portion (6 b) respectively, the connecting portion (6 a) and the connecting portion of the supporting portion (6 b) are bent, and the two connecting portions (6 a) are welded and fixed with the first conveying chain (13) and the second conveying chain (14) respectively.

4. The seedling tray feeding device according to claim 2, wherein: the driving mechanism (5) comprises a driving motor (15), a driving gear (16), a driven gear (17) and a rotating shaft (18), wherein the driving motor (15) is fixed at the top end of the frame (1), an output shaft of the driving motor (15) is connected with one end of the upper driving shaft (7) of the left conveying assembly (3), the driving gear (16) is fixedly sleeved on the upper driving shaft (7) of the left conveying assembly (3), one end of the rotating shaft (18) is rotatably connected with the frame (1), the driven gear (17) is fixedly sleeved at the other end of the rotating shaft (18), the driven gear (17) is meshed with the driving gear (16), and the rotating shaft (18) is in transmission connection with the upper driving shaft (7) of the right conveying assembly (4) through a synchronous belt assembly (19).

5. The seedling tray delivery device according to any one of claims 1 to 4, characterized in that: the seedling conveying device is characterized in that a guide mechanism (20) is arranged at the discharge end of the conveying mechanism, the guide mechanism (20) is located between the left conveying assembly (3) and the right conveying assembly (4), and the guide mechanism (20) is used for guiding the seedling tray (29) to slide onto the seedling conveying conveyor belt (2).

6. The seedling tray feeding device according to claim 5, wherein: guiding mechanism (20) are including guide bar (21), bracing piece (22) and backup pad (23), guide bar (21) are followed send the direction of delivery setting of seedling conveyer belt (2), guide bar (21) are "mountain" style of calligraphy, the open end orientation of guide bar (21) send the discharge end of seedling conveyer belt (2), the blind end of guide bar (21) with bracing piece (22) are articulated, the one end of bracing piece (22) is fixed in backup pad (23), backup pad (23) with frame (1) fixed connection.

7. The seedling tray feeding device according to claim 6, wherein: the support rod (22) is sleeved with a movable sleeve (24), a connecting plate (25) is arranged above the movable sleeve (24), the closed end of the guide rod (21) is fixedly connected with the movable sleeve (24) and the connecting plate (25) respectively, the section of the connecting plate (25) is L-shaped, the vertical part of the connecting plate (25) is fixedly welded with the outer wall of the movable sleeve (24), a through hole (26) is formed in the horizontal part of the connecting plate (25), a torsion spring (27) is sleeved on the outer wall of the movable sleeve (24), one end of the torsion spring (27) penetrates through the through hole (26), and the other end of the torsion spring (27) penetrates through the support plate (23) and is fixedly connected with the support plate (23).

8. The seedling tray delivery device according to claim 7, wherein: an electromagnet (28) is arranged below the horizontal part of the connecting plate (25), and the electromagnet (28) is fixed on the supporting plate (23).