Low-loss seedling clamp and seedling feeding device for sweet potatoes

Abstract

The utility model relates to the technical field of transplanter equipment, in particular to a low-loss seedling clamp for sweet potatoes, a placement plate is used for placing seedlings needing to be clamped, under the action of an elastic component, a fixed clamping plate and a movable clamping plate can clamp the seedlings, and meanwhile, the mounting position of the elastic component is controlled according to the pressure resistance degree of the seedlings, so that the seedlings can be conveniently and quickly clamped. The clamping force between the fixed clamping plate and the movable clamping plate can be adjusted, seedling damage is reduced, and the seedling transplanting survival rate is improved. The sweet potato seedling clamping device is suitable for clamping sweet potato seedlings and rhizome crops needing to be transplanted, and the application range is wider. The utility model further provides a seedling conveying device, automatic conveying of the seedlings is achieved, the working efficiency is high, meanwhile, low-loss conveying of the seedlings can be achieved in cooperation with a low-loss seedling clamp, damage to the seedlings is reduced, and the survival rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transplanting machine equipment technical field, concretely relates to a low loss seedling clamp for sweet potato and seedling feeding device. BACKGROUND

[0002] China's sweet potato planting area and export volume are the first in the world, with the characteristics of wide area and large span, the traditional sweet potato transplanting mode relies on a large number of manpower, and the work efficiency is low, the production cost is high, and the quality of seedling transplanting is difficult to guarantee. Since the sweet potato transplanting is mostly bare seedling transplanting, it also brings challenges to the research of the corresponding transplanting machine and its related devices. In the seedling feeding process, the seedling clamping and seedling releasing, seedling taking and other operations are easy to cause the damage of seedling, the damage rate is high, thereby affecting the survival rate of seedling. SUMMARY

[0003] The utility model aims at providing a low loss seedling clamp for sweet potato and seedling feeding device to solve the prior art problems existing in the above background.

[0004] To solve the above technical problems, the technical scheme provided by the utility model is:

[0005] On the one hand, the low loss seedling clamp for sweet potato provided in the application comprises a storage plate, a fixed clamping plate, a movable clamping plate, an elastic assembly and a driving assembly, the fixed clamping plate is fixedly arranged on the storage plate, the movable clamping plate is symmetrically arranged with the fixed clamping plate, the elastic assembly is fixedly arranged between the fixed clamping plate and the movable clamping plate, and the driving assembly drives the movable clamping plate to move on the storage plate.

[0006] On the basis of the above technical scheme, the driving assembly comprises a first protrusion, a pulley, a rocker and a connecting rod, the pulley slides on the first protrusion, one end of the rocker is hinged with the pulley, the other end of the rocker is hinged with the connecting rod, the other end of the connecting rod is hinged with the bottom end of the movable clamping plate, the bottom end of the storage plate is fixedly provided with a connecting piece, and the middle part of the rocker is hinged with the connecting piece.

[0007] On the basis of the above technical scheme, the first protrusion comprises a first protrusion main body and an arc-shaped boss, and the arc-shaped boss is symmetrically arranged at the two ends of the first protrusion main body.

[0008] On the basis of the above technical scheme, one side of the storage plate is provided with a baffle.

[0009] On the basis of the above technical scheme, further comprising an adjusting assembly, the adjusting assembly comprises an adjusting frame and an adjusting rod, the adjusting frame is symmetrically arranged at the bottom end of the fixed clamping plate, the adjusting rod is arranged in the adjusting frame and is fixed by a fixing piece, one end of the elastic assembly is connected to the adjusting rod, and the other end is connected to the bottom end of the movable clamping plate.

[0010] On the basis of the above technical scheme, the fixed clamping plate comprises a clamping plate body, a bent portion and a groove, the bent portion is fixedly arranged at the top end of the clamping plate body, and the groove is arranged on the inner side wall of the clamping plate body; the movable clamping plate is the same in structure as the fixed clamping plate, and the groove of the movable clamping plate is engaged with the groove of the fixed clamping plate to form a profiling accommodation space.

[0011] On the basis of the above technical scheme, the fixed clamping plate and the movable clamping plate are both made of flexible material.

[0012] On the basis of the above technical scheme, the fixed clamping plate and the movable clamping plate are both made of flexible material.

[0013] On the basis of the above technical scheme, the second protruding block is arranged below the first protruding block, the second protruding block comprises a second protruding block body, a first arc-shaped boss and a second arc-shaped boss, the first arc-shaped bosses are symmetrically arranged at two ends of the second protruding block body, the second arc-shaped bosses are symmetrically arranged on the inner sides of the first arc-shaped bosses, and the first arc-shaped boss and the second arc-shaped boss are connected through a third arc portion.

[0014] On the basis of the above technical scheme, the second protruding block is arranged below the first protruding block, the second protruding block comprises a second protruding block body, a first arc-shaped boss and a second arc-shaped boss, the first arc-shaped bosses are symmetrically arranged at two ends of the second protruding block body, the second arc-shaped bosses are symmetrically arranged on the inner sides of the first arc-shaped bosses, and the first arc-shaped boss and the second arc-shaped boss are connected through a third arc portion.

[0015] The technical scheme provided by the utility model has the advantages of:

[0016] 1. The utility model provides a low-damage seedling clamp for sweet potato, the object plate is used for placing the seedling needing to be clamped, under the action of the elastic assembly, the fixed clamping plate and the movable clamping plate can realize the clamping of the seedling, and according to the pressure resistance degree of the seedling, the installation position of the elastic assembly is controlled to realize the adjustable clamping force between the fixed clamping plate and the movable clamping plate, reduce the damage of the seedling and improve the survival rate of the transplanted seedling.

[0017] 2. The application also provides a seedling conveying device, which realizes automatic conveying of seedlings, has high work efficiency, and can realize low-damage conveying of seedlings, reduce damage to seedlings and improve survival rate in cooperation with a low-damage seedling clamp. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 is a schematic diagram of the structure of the first protruding block in the utility model;

[0020] Figure 3 is a schematic diagram of the structure of the fixed clamping plate in the utility model;

[0021] Figure 4 is a schematic diagram of the structure of the movable clamping plate in the utility model;

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of the seedling conveying device in the utility model;

[0023] Figure 6 is a front view of the seedling conveying device in the utility model;

[0024] Figure 7 is a schematic diagram of the structure of the conveying assembly in the utility model;

[0025] Figure 8 is a schematic diagram of the structure of the second protruding block in the utility model;

[0026] Figure 9 is a schematic diagram of the structure of the seedling pressing assembly in the utility model; DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and examples:

[0028] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the description of the utility model, it is understood that the terms "left", "right", "front", "back", "top", "bottom", etc. Indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore it cannot be understood as a limitation on the utility model.

[0030] As Figures 1 to 9 Indicated, the application provides a kind of low-loss seedling clamp for sweet potato, including storage board 1, fixed clamp plate 2, moving clamp plate 3, elastic component 4 and drive component 5, the fixed clamp plate 2 is fixedly arranged on storage board 1, the moving clamp plate 3 is symmetrically arranged with fixed clamp plate 2, the elastic component 4 is fixedly arranged between fixed clamp plate 2 and moving clamp plate 3, the drive component 5 drives moving clamp plate 3 to move on storage board 1.

[0031] The utility model provides a kind of low-loss seedling clamp for sweet potato, the storage board 1 is used to place the seedling needing to be clamped, under the action of elastic component 4, the fixed clamp plate 2 and moving clamp plate 3 can realize the clamping of seedling, simultaneously according to the pressure resistance degree of seedling, the installation position of elastic component 4 is controlled, the clamping force between fixed clamp plate 2 and moving clamp plate 3 is adjusted, reduce seedling damage, improve seedling transplant survival rate.Not only be applicable to the clamping of sweet potato seedling, also can be applicable to need to insert seedling etc. Root crops, more widely applicable. Preferably, the elastic component 4 adopts spring. While single hand can be placed into to fixed clamp plate and moving clamp plate by seedling, the problem that the running speed of current sweet potato transplanting machine is slow due to the slow speed of artificial seedling is solved, and the problem of low work efficiency is solved. In the following embodiment, sweet potato seedling is taken as an example to be described.

[0032] On the basis of the above technical scheme, the drive component 5 includes a first protrusion 51, a pulley 52, a rocker 53, and a connecting rod 54. The pulley 52 slides on the first protrusion 51. One end of the rocker 53 is hingedly connected to the pulley 52, and the other end is hingedly connected to the connecting rod 54. The other end of the connecting rod 54 is hingedly connected to the bottom end of the moving clamp plate 3. The bottom end of the storage board 1 is fixedly provided with a connecting piece 11. The middle part of the rocker 53 is hingedly connected to the connecting piece 11.

[0033] The driving assembly 5 drives the moving clamping plate 3 to move on the placing plate 1, facilitating the placement and clamping of seedlings; specifically, under the action of the elastic assembly 4, the moving clamping plate 3 and the fixed clamping plate 2 are in a normally closed state; when working, the conveying chain 81 drives the placing plate 1 to move, the pulley 52 slides to the top end of the first protrusion 51 when moving to the position of the first protrusion 51, the rocker 53 is hinged with the connecting rod 54, so as to drive the moving clamping plate 3 to slide to the direction away from the fixed clamping plate 2 against the tension of the elastic assembly 4, and enter the working area; at this time, the person only needs to place the seedling between the fixed clamping plate 2 and the moving clamping plate 3 with one hand; after continuing to convey to the position where the pulley 52 is separated from the first protrusion 51, under the action of the tension of the elastic assembly 4, the moving clamping plate 3 slides to the direction close to the fixed clamping plate 2, so as to realize the clamping of the seedling.

[0034] On the basis of the above technical scheme, the first protrusion 51 comprises a first protrusion main body 511 and an arc-shaped boss 512, and the arc-shaped boss 512 is symmetrically arranged at the two ends of the first protrusion main body 511.

[0035] By arranging the first protrusion 51, the fixed clamping plate 2 and the moving clamping plate 3 can be brought into the working state, that is, the moving clamping plate 3 is moved to open the working distance, so as to facilitate the placement of the seedling between the fixed clamping plate 2 and the moving clamping plate 3.

[0036] On the basis of the above technical scheme, one side of the placing plate 1 is provided with a baffle 12.

[0037] In a more preferred embodiment, by arranging the baffle 12, the seedling can be better prevented from falling during the conveying process, and the use is more convenient.

[0038] On the basis of the above technical scheme, an adjusting assembly is further arranged, the adjusting assembly comprises an adjusting frame 61 and an adjusting rod 62, the adjusting frame 61 is symmetrically arranged at the bottom end of the fixed clamping plate 2, the adjusting rod 62 is arranged in the adjusting frame 61 and is fixed by a fixing member, one end of the elastic assembly 4 is connected to the adjusting rod 62, and the other end is connected to the bottom end of the moving clamping plate 3.

[0039] Specifically, the bottom end of the moving clamping plate 3 is symmetrically provided with a connecting block 31, the connecting blocks 31 are fixedly provided with a connecting rod 32 therebetween, and the elastic assembly 4 is fixedly arranged between the adjusting rod 61 and the connecting rod 62; in a preferred embodiment, the elastic assembly 4 adopts a spring, and the tension spring can adjust the spring tension according to the distance between the adjusting rod 62, so as to adjust the clamping force between the fixed clamping plate 2 and the moving clamping plate 6.

[0040] The bottom end of the placing plate 1 is provided with a sliding groove 13, and the outer side wall of the moving clamping plate 3 is provided with a sliding block 33 matched with the sliding groove 13. Through the sliding groove 13 and the sliding block 33, the moving clamping plate 3 can be guided to move more stably and be adjusted conveniently.

[0041] On the basis of the above technical scheme, the fixed clamping plate 2 comprises a clamping plate body 21, a bent portion 22 and a groove 23, the bent portion 22 is fixedly arranged at the top end of the clamping plate body 21, and the groove 23 is arranged on the inner side wall of the clamping plate body 21; the moving clamping plate 3 is the same in structure as the fixed clamping plate 2, and the grooves of the moving clamping plate 3 and the fixed clamping plate 2 are engaged to form a profiling accommodation space.

[0042] In a more preferred embodiment, the bent portion 22 and the clamping plate body 21 are arranged in an integral molding structure; the grooves are arranged on the fixed clamping plate 2 and the moving clamping plate 3, and the grooves are engaged to form the accommodation space of the seedlings, preferably, the groove 23 has a profiling structure design, that is, the upper end face of the groove 23 is a curved surface extending outward, and the seedling is placed in the profiling groove during clamping, and the seedling slides out along the curved surface of the upper end of the groove when the mechanical hand takes it away, compared with the conventional seedling clamping, the seedling clamping can effectively reduce the scratch.

[0043] On the basis of the above technical scheme, the fixed clamping plate 2 and the moving clamping plate 3 are made of flexible materials. In a more preferred embodiment, the fixed clamping plate 2 and the moving clamping plate 3 are made of flexible materials, such as rubber materials, to assist in protecting the seedlings and more effectively realize low-loss clamping and conveying of the seedlings.

[0044] The utility model also provides a kind of seedling feeding device, including above-mentioned sweet potato with low-loss seedling clamp, still include rack 7 and drive placing plate movement conveying assembly 8, the conveying assembly 8 includes first sprocket 82, second sprocket 83, third sprocket 84, fourth sprocket 85 connected by conveying chain 81 sequentially and is rotated by power source drive, the second sprocket 83 and first sprocket 82 are located on same horizontal line and are rotatably connected with rack 7, the fourth sprocket 85 and third sprocket 84 are located on same horizontal line and are rotatably connected with rack 7, the third sprocket 84 is below second sprocket 83, placing plate 1 is uniformly provided with multiple groups on conveying chain 81.

[0045] The application also provides a seedling conveying device, which realizes automatic conveying of seedlings, has high work efficiency, and can realize low-damage conveying of seedlings, reduce damage to seedlings, and improve survival rate in cooperation with a low-damage seedling clamp. Specifically, four conveying sprockets are rotatably arranged on a rack 1, a conveying chain 81 is sequentially sleeved on the four conveying sprockets, and the placement plates 1 are fixedly arranged on the conveying chain 81 at equal intervals. One of the sprockets is driven to rotate by a power source, and the four sprockets can rotate synchronously through the conveying chain 81. More preferably, the power source can be a driving motor, or a ground wheel on a sweet potato transplanting machine can drive the sprocket to rotate through a chain.

[0046] On the basis of the above technical scheme, the second protrusion 9 is arranged below the first protrusion 51, the second protrusion 9 comprises a second protrusion body 91, a first arc-shaped boss 92 and a second arc-shaped boss 93, the first arc-shaped boss 92 is symmetrically arranged at both ends of the second protrusion body 91, the second arc-shaped boss 93 is symmetrically arranged on the inner side of the first arc-shaped boss 92, and the first arc-shaped boss 92 and the second arc-shaped boss 93 are connected through a third arc part 94.

[0047] In a more preferred embodiment, the second protrusion 9 is further arranged below the first protrusion 51, so that the fixed clamp plate 2 and the movable clamp plate 3 are slightly opened when conveyed to the position of the second protrusion 9, but not opened to the working state, the stress on the seedlings in the conveying process is reduced, low-damage conveying is further realized, and the seedlings can be easily removed by a subsequent mechanical hand and transplanted to the ridge.

[0048] In a more preferred embodiment, the second protrusion 9 can also be arranged in the same shape as the first protrusion 51, and the appropriate size is modified accordingly according to needs.

[0049] On the basis of the above technical scheme, the seedling pressing assembly 10 is arranged on the rack 7, the seedling pressing assembly 10 comprises a driving sprocket 101, a driven sprocket 102 and a seedling pressing belt 103, the driving sprocket 101 is driven to rotate by the conveying assembly 8 through a reversing gear, the driven sprocket 102 is driven to rotate by the driving sprocket 101 through the seedling pressing belt 103, and the bottom end of the seedling pressing belt 103 is arranged parallel above the placement plates 1.

[0050] In this embodiment, a seedling pressing assembly 10 is arranged on the rack, which can prevent the seedling from being warped or having a strange shape, so that the subsequent mechanical hand cannot correctly clamp the seedling, the seedling is protected to reduce damage, and the working efficiency is improved. Specifically, the driving wheel 101 is driven to rotate by the conveying assembly 8 through a chain and a gear, and after transmission through a reversing gear, the seedling pressing belt 103 can be relatively stationary with the conveying chain 81, for example, the placement plate 1 moves clockwise, the seedling pressing belt 103 moves counterclockwise, and the conveying process is more stable; the driven wheel 102 is provided with two groups and is located on the same horizontal line, that is, the bottom end of the seedling pressing belt 103 is arranged in parallel above the placement plate 1; more preferably, the driving wheel 101 and the driven wheel 102 are not on the same horizontal line, that is, the misalignment of the driving wheel 101 and the driven wheel 102 causes an inclination angle in front of the seedling pressing belt 103, so that the seedling can correctly enter the seedling pressing assembly 10.

[0051] More preferably, the inner side of the seedling pressing belt 103 is further provided with a tensioning wheel 104, and the tensioning wheel 104 is arranged between the driving wheel 101 and the driven wheel 102.

[0052] When the seedling conveying device works, it can be driven by the ground wheel of the sweet potato transplanting machine. The conveying chain 81 drives the placement plate to move clockwise. Due to the pulling force of the spring, the fixed clamping plate 2 and the movable clamping plate 3 on the placement plate 1 are in a normally closed state. The pulley 52 is lifted upward by the action of the first protrusion 51. The movable clamping plate 3 moves to the right against the pulling force of the spring, and enters the working area. At this time, the worker only needs to put the sweet potato seedling between the fixed clamping plate 2 and the movable clamping plate 3 with one hand; move to the seedling pressing assembly 10, the two sides of which are seedling pressing belts 103 linked with sprockets. After transmission by the two sprockets, the direction is turned over, so that the conveying chain 81 and the seedling pressing belt 103 of the seedling pressing assembly 10 can move relatively stationary. This can ensure that the sweet potato seedling is less damaged by friction; the pulling force of the tension spring gradually decreases due to the action of the first protrusion 51, and the movable clamping plate 3 moves to the left, and at the same time, under the influence of the seedling pressing assembly 10, the sweet potato seedling will not be warped or have a strange shape, so that it can be clamped tightly by the fixed clamping plate 2 and the movable clamping plate 3; after the seedling is clamped, it continues to be conveyed and moves to the second protrusion 9. Under the action of the second protrusion 9, the movable clamping plate 3 slides, and the fixed clamping plate 2 and the movable clamping plate 3 are slightly opened, reducing the stress on the sweet potato seedling, so that the mechanical hand can easily take the sweet potato seedling and transplant it to the ridge.

[0053] The clamping force calculation formula of the fixed clamping plate and the movable clamping plate is:

[0054] The distance between the installation position of the adjusting rod and the right end of the fixed clamping plate is y, the original length of the elastic component is b, the diameter of the seedling is c, the distance between the connecting position of the spring at the bottom end of the moving clamping plate and the left end surface is 4mm; when the fixed clamping plate and the moving clamping plate are in the closed state, the space reserved for the seedling is 3mm, so the seedling with a diameter greater than 3mm will be subjected to pressure;

[0055] When no seedling is placed and the fixed clamping plate and the moving clamping plate are in the initial force in the free closed state, ;

[0056] When the seedling is to be placed, the force of the fixed clamping plate and the moving clamping plate in the open state is ;

[0057] When the seedling is placed, the pressure of the fixed clamping plate and the moving clamping plate on the seedling in the closed state is ;

[0058] Therefore, according to the formula, the installation distance of the elastic component for seedlings of different diameters is obtained .

[0059] In the preferred embodiment, the sweet potato seedlings are selected, and the compression limit size of the sweet potato seedlings can be obtained according to the compression test of the stems of the sweet potato seedlings; since the sweet potato seedlings need to extend 5cm, plus the width of the seedling clamp, the compression limit size of 20cm from the root is selected, the average diameter c of the sweet potato seedlings is 4mm, and the critical pressure value is 9N, so the designed clamping force should be less than 9N, Fmax=9N. The AUM-D6-L30 type spring is selected as the elastic component, wherein the original length is 25mm, the maximum displacement is 12.7mm, the maximum load is 17.26N, and the spring coefficient is 1.08N / mm. Substituting the formula, the maximum installation distance is .

[0060] In other preferred embodiments, the clamping force can be adjusted according to the clamping requirements of different types of seedlings, which is convenient to operate and has a wider application range.

[0061] The above shows and describes the basic principle and main features of the present application, and for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, therefore the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0062] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A low-damage seedling clip for sweet potatoes, characterized in that, The utility model provides a kind of movable storage board, including storage board (1), fixed clamping plate (2), moving clamping plate (3), elastic component (4) and drive component (5), the fixed clamping plate (2) is fixedly arranged on storage board (1), the moving clamping plate (3) is symmetrically arranged with fixed clamping plate (2), the elastic component (4) is fixedly arranged between fixed clamping plate (2) and moving clamping plate (3), the drive component (5) drives moving clamping plate (3) and moves on storage board (1).

2. The low-damage seedling clip for sweet potato according to claim 1, characterized in that, The drive component (5) includes first lug (51), pulley (52), rocker (53) and connecting rod (54), the pulley (52) slides on the first lug (51), the rocker (53) is hinged to the pulley (52) at one end, and is hinged to the connecting rod (54) at the other end, the other end of the connecting rod (54) is hinged to the bottom end of the moving clamping plate (3), the bottom end of the storage board (1) is fixedly provided with a connecting piece (11), and the middle of the rocker (53) is hinged to the connecting piece (11).

3. The low-damage seedling holder for sweet potato according to claim 2, characterized in that, The first lug (51) includes a first lug body (511) and a circular-arc-shaped boss (512), and the circular-arc-shaped boss (512) is symmetrically arranged at both ends of the first lug body (511).

4. The low-damage seedling holder for sweet potato according to claim 1, wherein One side of the storage board (1) is provided with a baffle (12).

5. The low-damage seedling holder for sweet potato according to claim 1, wherein Further comprising an adjusting assembly, the adjusting assembly includes an adjusting frame (61) and an adjusting rod (62), the adjusting frame (61) is symmetrically arranged at the bottom end of the fixed clamping plate (2), the adjusting rod (62) is arranged in the adjusting frame (61) and is fixed by a fixing member, one end of the elastic component (4) is connected to the adjusting rod (62), and the other end is connected to the bottom end of the moving clamping plate (3).

6. The low-damage seedling clip for sweet potato according to claim 1, wherein The fixed clamping plate (2) includes a clamping plate body (21), a bent portion (22) and a groove (23), the bent portion (22) is fixedly arranged at the top end of the clamping plate body (21), and the groove (23) is arranged on the inner side wall of the clamping plate body (21); the moving clamping plate (3) is the same as the fixed clamping plate (2) in structure, and the grooves of the moving clamping plate (3) and the fixed clamping plate (2) are engaged to form a profiled accommodation space.

7. The low-damage seedling clip for sweet potato according to claim 6, characterized in that, The fixed clamping plate (2) and the moving clamping plate (3) are both made of flexible material.

8. A seedling delivery device comprising the low-damage seedling holder for sweet potato according to claim 4, characterized in that, Further comprising a rack (7) and a conveying assembly (8) for driving the storage board to move, the conveying assembly (8) includes first sprocket (82), second sprocket (83), third sprocket (84), fourth sprocket (85) connected in sequence by conveying chain (81) and driven to rotate by a power source, the second sprocket (83) and the first sprocket (82) are located on the same horizontal line and are rotatably connected with the rack (7), the fourth sprocket (85) and the third sprocket (84) are located on the same horizontal line and are rotatably connected with the rack (7), the third sprocket (84) is located below the second sprocket (83), and the storage board (1) is uniformly provided with multiple groups on the conveying chain (81).

9. The seedling delivery device of claim 8, wherein, The second protrusion (9) is arranged below the first protrusion (51), the second protrusion (9) comprises a second protrusion body (91), a first arc-shaped boss (92) and a second arc-shaped boss (93), the first arc-shaped boss (92) is symmetrically arranged at both ends of the second protrusion body (91), the second arc-shaped boss (93) is symmetrically arranged at the inner side of the first arc-shaped boss (92), and the first arc-shaped boss (92) and the second arc-shaped boss (93) are connected through a third arc part (94).

10. The seedling delivery device of claim 8, wherein, The seedling pressing assembly (10) is arranged on the rack (7), the seedling pressing assembly (10) comprises a driving wheel (101), a driven wheel (102) and a seedling pressing belt (103), the driving wheel (101) is driven to rotate by the conveying assembly (8) through a reversing gear, the driven wheel (102) is driven to rotate by the driving wheel (101) through the seedling pressing belt (103), and the bottom end of the seedling pressing belt (103) is arranged in parallel above the storage plate (1).

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