A device for interplanting seedlings of different sizes and a method thereof

Abstract

The application provides a size seedling staggered type transplanting device and method, and belongs to the field of agricultural machinery. The device comprises a crank rocker type dividing and transplanting mechanism, a planetary gear train dividing and transplanting mechanism, a transplanting box, a transverse seedling feeding mechanism, a longitudinal seedling feeding mechanism, a seedling planting table mechanism and a rack. The seedling planting table mechanism is divided into a small seedling planting table and a large seedling planting table. Under the control of the transplanting box, the transverse seedling feeding mechanism and the longitudinal seedling feeding mechanism provide the crank rocker type dividing and transplanting mechanism and the planetary gear train dividing and transplanting mechanism with large and small seedlings for transplanting, respectively. Compared with the prior art, the device can simultaneously have the ability to transplant large and small seedlings, reduce the seedling damage rate, realize the staggered layout of large and small seedlings, and improve the pollination effect of hybrid rice seed production.

Description

Technical Field

[0008] , ,

[0007] , , ,

[0010] ,

[0009]

[0001] The present invention relates to the technical field of agricultural machinery, and particularly to a staggered transplanting device for large and small rice seedlings and its method. Background Art

[0002] Existing research shows that when hybrid rice is seed-produced, by simultaneously planting two batches of male parent rice seedlings with different seedling ages and making the large and small seedlings distributed in a staggered "pin" shape in the paddy field, it can better ensure the meeting of the flowering periods of the male and female parents, so as to improve the pollination effect. Under such agronomic requirements, traditional transplanting devices are difficult to meet the requirements. Moreover, when using the same seedling separation and transplanting mechanism for seedlings of different seedling stages, it is difficult for the transplanting trajectory to bypass the large seedlings, and the large seedlings will be knocked down, thus causing problems such as "bridging, pushing seedlings, and damaging seedlings".

[0003] Therefore, there is an urgent need to develop a staggered transplanting device for large and small rice seedlings applicable to the male parent transplanter for hybrid rice seed production. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings that the rice transplanter cannot meet the requirement of the staggered "pin" shape distribution of large and small seedlings for the male parent transplanting in hybrid rice seed production, and to avoid the behavior of damaging large seedlings during the transplanting process, and to provide a staggered transplanting device for large and small rice seedlings and its method.

[0005] The specific technical solutions adopted by the present invention are as follows:

[0006] In the first aspect, the present invention provides a staggered transplanting device for large and small rice seedlings, including a crank rocker type seedling separation and transplanting mechanism, a planetary gear train seedling separation and transplanting mechanism, a transplanting box, a transverse seedling feeding mechanism, a longitudinal seedling feeding mechanism, a seedling planting table mechanism and a frame.

[0007] The seedling planting table mechanism includes a large seedling planting table, a small seedling planting table and a chute. The large seedling planting table and the small seedling planting table are arranged in parallel, and the lower ends are slidably connected to the chute. Two seedling taking openings are provided below the chute.

[0008] One end of the frame is fixed to the rear end of the traction device of the male parent transplanter for hybrid rice seed production, and the other end is fixedly connected to the chute in the seedling planting table mechanism. A transplanting box is arranged on the frame.

[0009] The transplanting box includes a transplanting input shaft, a transplanting transmission shaft, a guiding cam screw, a guiding slider, a transverse seedling feeding shaft, a longitudinal seedling feeding shaft, a housing and a transplanting arm shaft. Among them, the transplanting transmission shaft, the guiding cam screw and the guiding slider are arranged inside the housing, and the transverse seedling feeding shaft, the longitudinal seedling feeding shaft and the transplanting arm shaft pass through the housing, and both ends are located on both sides of the housing.

[0010] The planting input shaft is rotatably connected to the planting drive shaft via a bevel gear set. The planting drive shaft is rotatably connected to the guide cam screw via a gear set. The guide cam screw has a raised helical groove along its axial direction. The transverse and longitudinal seedling feeding shafts are arranged parallel to the guide cam screw. The transverse and longitudinal seedling feeding shafts and the guide cam screw are connected by a guide slide. The guide slide is perpendicular to the guide cam screw. The contact point between the guide slide and the guide cam screw has a structure that matches the raised helical groove on the guide cam screw, allowing the guide slide to perform a periodic reciprocating translational motion when the guide cam screw rotates axially. The contact point between the guide slide and the transverse seedling feeding shaft is fixed by a pin, allowing the guide slide to drive the transverse seedling feeding shaft in a periodic reciprocating translational motion. A spring and a cam assembly are provided at one end of the guide cam screw, and a cam is also provided at the corresponding position on the longitudinal seedling feeding shaft. During the periodic reciprocating translational motion of the guide slide, the spring on the guide cam screw is periodically compressed. Through the cooperation between the cam on the guide cam screw and the cam on the longitudinal seedling feeding shaft, the longitudinal seedling feeding shaft is controlled to rotate axially periodically.

[0011] The planting drive shaft is rotatably connected to the planting arm shaft via a sprocket. One end of the planting arm shaft is connected to a crank-rocker type planting mechanism for planting small seedlings, and the other end is connected to a planetary gear system planting mechanism for planting large seedlings.

[0012] The transverse seedling feeding mechanism includes a seedling platform moving arm and a seedling platform connecting screw. One end of the seedling platform moving arm is connected to the transverse seedling feeding shaft in the planting box, and the other end is connected to one end of the seedling platform connecting screw. The other end of the seedling platform connecting screw is connected to the seedling platform mechanism. The translational movement of the transverse seedling feeding shaft is controlled by the seedling platform moving arm and the seedling platform connecting screw to make periodic reciprocating translational movements of the seedling platform mechanism within the chute.

[0013] The longitudinal seedling feeding mechanism is fixed to both sides of the outer shell of the transplanting box. The mechanism includes a longitudinal seedling feeding rocker arm, a connecting rod, a lever plate, and a return spring. One end of the longitudinal seedling feeding rocker arm is fixedly connected to the longitudinal seedling feeding shaft in the transplanting box. The rocker arm is hinged to the lever plate via the connecting rod. A ratchet is mounted on the lever plate, which drives the seedling feeding ratchet on the transplanting platform mechanism to achieve longitudinal seedling feeding. A return spring is also mounted on the lever plate, connecting the lever plate and the frame, to reset the longitudinal seedling feeding mechanism after rotation.

[0014] Preferably, the lateral spacing between the two seedling picking openings on the chute is set to 300mm, which is 10mm more than the traditional seedling picking opening spacing of 290mm, that is, an increase of half a blanket-shaped seedling row spacing.

[0015] Preferably, the length of the spiral groove on the guide cam screw is set to 120~140mm, which is 20mm longer than the traditional spiral groove length of 100~120mm, that is, an increase of one blanket-shaped seedling row spacing.

[0016] Preferably, the aforementioned crank-rocker type seedling insertion mechanism includes a crank, a rocker arm, a first seedling claw, and a seedling claw connecting rod. The seedling arm shaft is rotatably connected to one end of the crank, and the other end of the crank is rotatably connected to the rocker arm via the seedling claw connecting rod. When the crank rotates around its center of rotation, it drives the seedling claw connecting rod and the rocker arm to swing. A first seedling claw is provided on the outer side of the seedling claw connecting rod, and a seedling picking needle is provided on the first seedling claw.

[0017] Furthermore, in the aforementioned crank-rocker type insertion mechanism, the crank length is 60 mm, the rocker length is 186 mm, and the length of the seedling claw connecting rod (14) is 145 mm.

[0018] Furthermore, the horizontal distance between the rotation center of the rocker arm and the rotation center of the crank is 115 mm, and the vertical distance is 95 mm. In the initial state, the distance from the tip of the seedling-picking needle on the first seedling claw to the driven end of the crank is 220 mm, and the included angle is 45°. The included angle between the crank and the ground is 268°.

[0019] Preferably, the aforementioned planetary gear train insertion mechanism includes two elliptical gear sets, two cylindrical gear sets, a second pawl, an insertion mechanism housing, and a planetary gear train insertion mechanism input shaft. Each elliptical gear set includes a driving elliptical gear and a driven elliptical gear, and each cylindrical gear set includes a driving cylindrical gear and a driven cylindrical gear.

[0020] The driving elliptical gear serves as the sun gear, while the driven elliptical gear is coaxial with the driving cylindrical gear, forming an intermediate gear. The driven cylindrical gear serves as a planetary gear. The planting arm shaft is connected to the planetary gear train insertion mechanism via a chain drive, forming a rotatable connection with the input shaft of the planetary gear train insertion mechanism. The input shaft of the planetary gear train insertion mechanism is rotatably connected to the insertion mechanism housing. The insertion mechanism housing drives the second seedling claw to move via the planetary gear train. The second seedling claw is equipped with seedling-picking needles.

[0021] Furthermore, the eccentricity of both the driving and driven elliptical gears in the aforementioned elliptical gear set is 0.38, and their major diameter is 25 mm. The diameter of both the driving and driven cylindrical gears in the cylindrical gear set is 50 mm.

[0022] Furthermore, the distance from the tip of the seedling-picking needle on the second seedling claw to the center of rotation is 110mm. The initial angle between the tip of the seedling-picking needle on the second seedling claw and its center of rotation is 70°. In the initial state, the housing of the dispensing mechanism is perpendicular to the ground, and the angle between the active elliptical gear and the ground is 315°.

[0023] Secondly, the present invention provides a method for interleaving seedlings of different sizes using the interleaved planting device described in the first aspect, as follows:

[0024] Fix one end of the rack at the rear end of the traction device of the hybrid rice seed production male parent transplanter. Add large seedlings and small seedlings of hybrid rice male parent to the large-seedling transplanting table and the small-seedling transplanting table respectively, and then input power to the planting input shaft to drive the crank rocker type seedling separating and planting mechanism, the planetary gear train seedling separating and planting mechanism, the horizontal seedling feeding mechanism and the vertical seedling feeding mechanism to move periodically.

[0025] When the first seedling claw of the crank rocker type seedling separating and planting mechanism reaches the seedling taking port for taking small seedlings at two intervals, the second seedling claw in the planetary gear train seedling separating and planting mechanism just takes seedlings. When the crank of the crank rocker type seedling separating and planting mechanism makes two intervals for small-seedling planting, the second seedling claw of the planetary gear train seedling separating and planting mechanism just makes large-seedling planting, so that the large seedlings and small seedlings are staggered in the paddy field.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) In the large and small seedling staggered planting device provided by the present invention, the planetary gear train seedling separating and planting mechanism and the crank rocker type seedling separating and planting mechanism are set to plant large seedlings and small seedlings respectively, avoiding the problem that the seedling separating and planting mechanism cannot bypass the large seedlings and being impacted by the seedling separating and planting mechanism, and further causing problems such as "bridging, pushing seedlings, and damaging seedlings".

[0028] (2) In the large and small seedling staggered planting device provided by the present invention, the crank rocker type seedling separating and planting mechanism and the planetary gear train seedling separating and planting mechanism are installed on both sides of the planting box with a certain initial phase difference, and the distances between the two seedling taking ports set on the sliding groove and the lengths of the spiral grooves on the guiding cam screw are changed, so that when the crank of the crank rocker type seedling separating and planting mechanism reaches the interval for taking small seedlings at the seedling taking port, the planetary gear train seedling separating and planting mechanism just takes seedlings; when the crank of the crank rocker type seedling separating and planting mechanism makes an interval for small-seedling planting, the planetary gear train seedling separating and planting mechanism just makes large-seedling planting, realizing the agronomic requirements of the "pin" type staggered distribution of large and small seedlings. Brief Description of the Drawings

[0029] Figure 1 Is an axonometric drawing of the large and small seedling staggered planting device provided in this embodiment;

[0030] Figure 2 Is a schematic diagram of the distance between the seedling taking ports in the planting table mechanism and the traditional distance provided in this embodiment;

[0031] Figure 3 Is a structural diagram of the vertical seedling feeding mechanism provided in this embodiment;

[0032] Figure 4 Is a top view of the horizontal seedling feeding mechanism and the planting box provided in this embodiment;

[0033] Figure 5This is a schematic diagram of the internal structure of the planting box provided in this embodiment;

[0034] Figure 6 This is a simplified diagram of the planetary gear train insertion mechanism provided in this embodiment;

[0035] Figure 7 This is a simplified diagram of the crank-rocker type dispensing mechanism provided in this embodiment;

[0036] Figure 8 This is a schematic diagram of the motion trajectory of the planetary gear train insertion mechanism and the crank-rocker type insertion mechanism provided in this embodiment;

[0037] Figure 9 This is a schematic diagram illustrating the planting effect of the staggered planting device for seedlings of different sizes provided in this embodiment;

[0038] In the diagram: 1. Crank-rocker type seedling insertion mechanism; 11. Crank; 12. Rocker; 13. First seedling claw; 14. Seedling claw connecting rod; 2. Planetary gear train seedling insertion mechanism; 21. Elliptical gear set; 23. Second seedling claw; 24. Seeding mechanism housing; 25. Planetary gear train seedling insertion mechanism input shaft; 3. Planting box; 31. Planting input shaft; 32. Planting transmission shaft; 33. Guide cam screw; 34. Guide slide; 35. Transverse seedling feeding shaft; 36. Longitudinal seedling feeding shaft; 37. Housing; 38. Planting arm shaft; 4. Transverse seedling feeding mechanism; 41. Seeding platform moving arm; 42. Seeding platform connecting screw; 5. Longitudinal seedling feeding mechanism; 5. Longitudinal seedling feeding rocker; 51. Connecting rod; 52. Paddle plate; 53. Return spring; 54. Seeding platform mechanism; 6. Large seedling planting platform; 61. Small seedling planting platform; 62. Slide; 63. Seedling taking port; 7. Frame. Detailed Implementation

[0039] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly, provided that there is no mutual conflict.

[0040] In the description of this invention, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0041] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it can be a direct connection to the other element or an indirect connection, i.e., there is an intermediate element. Conversely, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0042] This embodiment, as a preferred embodiment of a specific implementation, provides a seedling transplanting device with alternating seedling sizes, which is suitable for installation in a hybrid rice seed production male parent transplanter.

[0043] like Figure 1 As shown, the alternating seedling planting device of different sizes provided in this embodiment includes a crank-rocker type planting mechanism 1, a planetary gear system planting mechanism 2, a planting box 3, a transverse seedling feeding mechanism 4, a longitudinal seedling feeding mechanism 5, a planting platform mechanism 6, and a frame 7. The frame 7 can be installed at the rear end of the traction device of the hybrid rice seed production male parent rice transplanter.

[0044] like Figure 2 As shown, the seedling planting platform mechanism 6 includes a large seedling planting platform 61, a small seedling planting platform 62, and a sliding groove 63. The large seedling planting platform 61 and the small seedling planting platform 62 are arranged side by side, with their lower ends mounted on the sliding groove 63, forming a sliding connection. The large seedling planting platform 61 and the small seedling planting platform 62 can perform periodic reciprocating translational movement on the sliding groove 63. Two seedling picking ports 64 are provided below the sliding groove 63. In this embodiment, the lateral spacing between the two seedling picking ports 64 is set to 300mm, which is 10mm larger than the traditional seedling picking port spacing of 290mm. Unlike the symmetrical design of the two seedling picking ports in the traditional device, the lateral spacing between the two seedling picking ports 64 is increased by half a row spacing of seedlings, that is, increased by 10mm, which can ensure that the first seedling claw 13 or the second seedling claw 23 will not collide with the seedling planting platform mechanism 6.

[0045] One end of the frame 7 is fixed to the rear end of the traction device of the hybrid rice seed production male parent transplanter, and the other end is fixedly connected to the slide 63 in the transplanting platform mechanism 6. A transplanting box 3 is also provided on the frame 7.

[0046] like Figure 4 and Figure 5 As shown, the transplanting box 3 includes a transplanting input shaft 31, a transplanting drive shaft 32, a guide cam screw 33, a guide slide 34, a transverse seedling feeding shaft 35, a longitudinal seedling feeding shaft 36, a housing 37, and a transplanting arm shaft 38. The transplanting drive shaft 32, guide cam screw 33, and guide slide 34 are located inside the housing 37. The transverse seedling feeding shaft 35, the longitudinal seedling feeding shaft 36, and the transplanting arm shaft 38 pass through the housing 37, with their ends located on both sides of the housing.

[0047] The insertion input shaft 31 is rotatably connected to the insertion drive shaft 32 via a bevel gear set, enabling control of the axial rotation of the insertion drive shaft 32. The insertion drive shaft 32 is rotatably connected to the guide cam screw 33 via a gear set. When the insertion drive shaft 32 rotates axially, it drives the guide cam screw 33 to rotate axially via the gear set. The guide cam screw 33 has raised helical grooves along its axial direction.

[0048] The transverse seedling feeding shaft 35 and the longitudinal seedling feeding shaft 36 are arranged parallel to the guide cam screw 33. The transverse seedling feeding shaft 35, the longitudinal seedling feeding shaft 36, and the guide cam screw 33 are connected by a guide slide 34. The guide slide 34 is arranged perpendicular to the guide cam screw 33, and the internal structure of the guide cam screw 33 at the contact position is provided with a structure that matches the helical groove protruding on the guide cam screw 33. When the guide cam screw 33 rotates axially, the helical groove protruding on the guide cam screw 33 cooperates with the internal structure of the guide slide 34, so that when the guide cam screw 33 rotates axially, it drives the guide slide 34 to perform a periodic reciprocating translational motion.

[0049] The guide slide 34 and the transverse seedling feeding shaft 35 are fixedly connected at their contact points by a pin. Therefore, when the guide slide 34 performs a periodic reciprocating translational movement, it drives the transverse seedling feeding shaft 35 to perform a periodic reciprocating translational movement. Figure 5 As shown, a spring and a cam assembly are provided at one end of the guide cam screw 33, and a cam is also provided at a corresponding position on the longitudinal seedling feeding shaft 36. When the guide slide body 34 moves in a periodic reciprocating translational motion, the spring on the guide cam screw 33 is periodically compressed. Through the interaction between the cam on the guide cam screw 33 and the cam on the longitudinal seedling feeding shaft 36, the longitudinal seedling feeding shaft 36 is controlled to rotate axially in a periodic manner.

[0050] In this embodiment, the length of the spiral groove on the guide cam screw 33 is set to 120-140mm, which is 20mm longer than the traditional spiral groove length of 100-120mm, i.e., an increase of one blanket-shaped seedling row spacing. The length of the spiral groove on the guide cam screw 33 being one blanket-shaped seedling row spacing longer than the traditional spiral groove length allows the time of the periodic reciprocating translational movement of the guide slide body 34 to be staggered with the time of the periodic axial rotation of the transverse seedling feeding shaft 35. Furthermore, the increase in the length of the spiral groove on the guide cam screw 33 by one blanket-shaped seedling row spacing compared to the traditional spiral groove length of 100-120mm also ensures that all seedlings on the planting platform can be planted in the soil.

[0051] The insertion drive shaft 32 is rotatably connected to the insertion arm shaft 38 via a sprocket. One end of the insertion arm shaft 38 is connected to the crank-rocker type insertion mechanism 1 outside the housing 37, and the other end is connected to the planetary gear insertion mechanism 2 outside the housing 37.

[0052] like Figure 4As shown, the transverse seedling feeding mechanism 4 includes two seedling platform moving arms 41 and two seedling platform connecting screws 42. One end of each seedling platform moving arm 41 is connected to the transverse seedling feeding shaft 35 in the planting box 3, and the other end is connected to one end of the seedling platform connecting screw 42. The two seedling platform connecting screws 42 are respectively connected to the large seedling seedling planting platform 61 and the small seedling seedling planting platform 62 in the seedling platform mechanism 6. When the transverse seedling feeding shaft 35 moves periodically, the seedling platform moving arms 41 and the seedling platform connecting screws 42 control the seedling platform mechanism 6 to make periodic reciprocating translational movements within the slide groove 63.

[0053] The longitudinal seedling feeding mechanism 5 is fixed to both sides of the outer shell 37 of the transplanting box 3. For example... Figure 3 As shown, the longitudinal seedling feeding mechanism 5 includes a longitudinal seedling feeding rocker arm 51, a connecting rod 52, a lever plate 53, and a return spring 54. One end of the longitudinal seedling feeding rocker arm 51 is fixedly connected to the longitudinal seedling feeding shaft 36 in the planting box 3. The longitudinal seedling feeding rocker arm 51 is hinged to the lever plate 53 via the connecting rod 52, and a ratchet is provided on the lever plate 53. When the longitudinal seedling feeding shaft 36 in the planting box 3 rotates at a small angle, it drives the longitudinal seedling feeding rocker arm 51 to rotate at a certain angle, and drives the lever plate 53 to rotate via the connecting rod 52. Finally, the ratchet drives the seedling feeding ratchet belt on the planting platform mechanism 6 to achieve longitudinal seedling feeding.

[0054] A return spring 54 is provided on the dial plate 53. The return spring 54 connects the dial plate 53 and the frame 7, and can reset the longitudinal seedling feeding mechanism 5 after rotation. Through the transmission of this planting box, a periodic and stable coordination between planting, longitudinal seedling feeding, and transverse seedling feeding can be achieved.

[0055] This embodiment uses a planetary gear train transplanting mechanism 2 to transplant large seedlings. For example... Figure 6 The schematic diagram of the mechanical structure shown illustrates that the planetary gear train transplanting mechanism 2 includes two elliptical gear sets 21, two cylindrical gear sets 22, a second seedling claw 23, a transplanting mechanism housing 24, and a planetary gear train transplanting mechanism input shaft 25. Each elliptical gear set 21 includes a driving elliptical gear and a driven elliptical gear, and each cylindrical gear set 22 includes a driving cylindrical gear and a driven cylindrical gear. The driving elliptical gear serves as the sun gear, and the driven elliptical gear is coaxial with the driving cylindrical gear, serving as an intermediate gear. The driven cylindrical gear serves as a planetary gear. The transplanting arm shaft 38 is rotatably connected to the planetary gear train transplanting mechanism 2 via a chain drive to the input shaft 25. The planetary gear train transplanting mechanism input shaft 25 is rotatably connected to the transplanting mechanism housing 24. The transplanting mechanism housing 24 drives the seedling-picking needles on the second seedling claw 23 through the planetary gear train to transplant large seedlings.

[0056] A crank-rocker mechanism refers to a four-bar linkage with a crank and a rocker arm. This embodiment uses a crank-rocker type seedling insertion mechanism 1 for inserting small seedlings. For example... Figure 7The schematic diagram of the mechanical structure shown illustrates a crank-rocker type seeding insertion mechanism 1, comprising a crank 11, a rocker arm 12, a first seedling claw 13, and a seedling claw connecting rod 14. The insertion arm shaft 38 is rotatably connected to one end of the crank 11, and the other end of the crank 11 is rotatably connected to the rocker arm 12 via the seedling claw connecting rod 14. When the crank 11 rotates around its center of rotation, it drives the seedling claw connecting rod 14 and the rocker arm 12 to swing. The first seedling claw 13 is located on the outer side of the seedling claw connecting rod 14, and a seedling-picking needle is provided on the first seedling claw 13.

[0057] In the planetary gear train insertion mechanism 2 provided in this embodiment, the eccentricity of both the driving and driven elliptical gears in the elliptical gear set 21 is 0.38, and their major diameter is 25 mm. The diameter of both the driving and driven cylindrical gears in the cylindrical gear set 22 is 50 mm. The distance from the tip of the seedling-picking needle on the second seedling claw 23 to the center of rotation is 110 mm. In the initial state, the angle between the tip of the seedling-picking needle on the second seedling claw 23 and its center of rotation is 70°. The insertion mechanism housing 24 is set perpendicular to the ground, and the angle between the driving elliptical gear and the ground is 315°.

[0058] In the crank-rocker type insertion mechanism 1 provided in this embodiment, the crank 11 has a length of 60 mm, the rocker arm 12 has a length of 186 mm, and the seedling claw connecting rod 14 has a length of 145 mm. The horizontal distance between the rotation center of the rocker arm 12 and the rotation center of the crank 11 is 115 mm, and the vertical distance is 95 mm. The distance from the tip of the seedling picking needle on the first seedling claw 13 to the driven end of the crank 11 is 220 mm, and the included angle is 45°. In the initial state, the included angle between the crank 11 and the ground is 268°.

[0059] Taking the above parameters as an example, the insertion trajectory of this planetary gear train insertion mechanism is as follows: Figure 8 As shown, the insertion height of the planetary gear system insertion mechanism is more than twice that of the crank-rocker type insertion mechanism, which can effectively prevent collisions with large seedlings.

[0060] The alternating seedling planting device of different sizes provided by this invention is fixed to a hybrid rice seed production male parent rice transplanter, and the working process is as follows:

[0061] S1: Fix one end of the frame 7 to the rear end of the traction device of the hybrid rice seed production male parent transplanter. Place the hybrid rice male parent large seedlings and small seedlings into the large seedling transplanting platform 61 and the small seedling transplanting platform 62, respectively.

[0062] S2: Input power to the input end of the planting input shaft 31 of the planting box 3, and drive the axial rotation of the planting transmission shaft 32 through the bevel gear set. When the planting transmission shaft 32 rotates axially, drive the axial rotation of the guiding cam screw 33 through the gear set. When the guiding cam screw 33 rotates axially, through the cooperation of the raised spiral groove and the guiding slider 34, the guiding slider 34 can make a periodic reciprocating translational movement on the guiding cam screw 33, thereby driving the transverse seedling feeding shaft 35 to make a periodic reciprocating translational movement, and compressing the spring arranged on the guiding cam screw 33 periodically. During the periodic compression of the spring, through the cooperation of the cams on the guiding cam screw 33 and the longitudinal seedling feeding shaft 36, the periodic axial rotation of the longitudinal seedling feeding shaft 36 is controlled.

[0063] While the planting transmission shaft 32 rotates axially, drive the axial rotation of the planting arm shaft 38 through the sprocket wheel, thereby driving the periodic movement of the crank rocker type transplanting mechanism 1 and the planetary gear train transplanting mechanism 2 at both ends of the planting arm shaft 38.

[0064] When the first seedling claw 13 of the crank rocker type transplanting mechanism 1 reaches the two intervals of taking small seedlings at the seedling taking port 64, the second seedling claw 23 in the planetary gear train transplanting mechanism 2 just takes seedlings. When the first seedling claw 13 of the crank rocker type transplanting mechanism 1 has two intervals of transplanting small seedlings, the second seedling claw 23 of the planetary gear train transplanting mechanism 2 just transplants large seedlings, so that the large seedlings and small seedlings are distributed in a staggered "pin" shape in the paddy field, specifically as Figure 9 shown.

[0065] Compared with the prior art, the staggered planting device provided by the present invention has the ability to plant large seedlings and small seedlings simultaneously, reduces the seedling injury rate, and realizes the staggered layout of large and small seedlings, improving the pollination effect of hybrid rice seed production.

[0066] The above embodiments are only a preferred solution of the present invention, but it is not intended to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by adopting equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A device for staggered planting of seedlings of different sizes, characterized in that, It includes a crank-rocker type seeding mechanism (1), a planetary gear seeding mechanism (2), a seeding box (3), a transverse seedling feeding mechanism (4), a longitudinal seedling feeding mechanism (5), a seedling planting platform mechanism (6), and a frame (7). The seedling planting platform mechanism (6) includes a large seedling planting platform (61), a small seedling planting platform (62), and a chute (63); the large seedling planting platform (61) and the small seedling planting platform (62) are arranged side by side, and their lower ends are slidably connected to the chute (63); two seedling picking ports (64) are opened below the chute (63). One end of the frame (7) is fixed to the rear end of the traction device of the hybrid rice seed production male parent transplanter, and the other end is fixedly connected to the slide (63) in the transplanting platform mechanism (6); a transplanting box (3) is provided on the frame (7). The planting box (3) includes a planting input shaft (31), a planting transmission shaft (32), a guide cam screw (33), a guide slide (34), a transverse seedling feeding shaft (35), a longitudinal seedling feeding shaft (36), a housing (37), and a planting arm shaft (38); wherein the planting transmission shaft (32), the guide cam screw (33), and the guide slide (34) are located inside the housing (37), and the transverse seedling feeding shaft (35), the longitudinal seedling feeding shaft (36), and the planting arm shaft (38) pass through the housing (37), with both ends located on both sides of the housing (37); The planting input shaft (31) is rotatably connected to the planting transmission shaft (32) via a bevel gear set; the planting transmission shaft (32) is rotatably connected to the guide cam screw (33) via a gear set; the guide cam screw (33) has a raised spiral along its axial direction; the transverse seedling feeding shaft (35) and the longitudinal seedling feeding shaft (36) are arranged parallel to the guide cam screw (33); the transverse seedling feeding shaft (35), the longitudinal seedling feeding shaft (36) and the guide cam screw (33) are connected by a guide slide (34); the guide slide (34) is arranged perpendicular to the guide cam screw (33); the guide slide (34) has a structure inside the contact position with the guide cam screw (33) that matches the raised spiral on the guide cam screw (33). The structure allows the guide cam screw (33) to rotate axially, causing the guide slide (34) to perform periodic reciprocating translational motion. The guide slide (34) is fixedly connected to the transverse seedling feeding shaft (35) at the contact position by a pin, so that the guide slide (34) drives the transverse seedling feeding shaft (35) to perform periodic reciprocating translational motion. One end of the guide cam screw (33) is provided with a spring and a cam assembly, and a cam is also provided at the corresponding position on the longitudinal seedling feeding shaft (36). During the periodic reciprocating translational motion of the guide slide (34), the spring on the guide cam screw (33) is periodically compressed. Through the cooperation between the cam on the guide cam screw (33) and the cam on the longitudinal seedling feeding shaft (36), the longitudinal seedling feeding shaft (36) is controlled to perform periodic axial rotation. The planting drive shaft (32) is rotatably connected to the planting arm shaft (38) via a sprocket; one end of the planting arm shaft (38) is connected to the crank-rocker type splitting mechanism (1) for planting small seedlings, and the other end is connected to the planetary gear splitting mechanism (2) for planting large seedlings. The transverse seedling feeding mechanism (4) includes a seedling platform moving arm (41) and a seedling platform connecting screw (42); one end of the seedling platform moving arm (41) is connected to the transverse seedling feeding shaft (35) in the planting box (3), and the other end is connected to one end of the seedling platform connecting screw (42); the other end of the seedling platform connecting screw (42) is connected to the seedling platform mechanism (6); the transverse seedling feeding shaft (35) moves in translation, and the seedling platform mechanism (6) is controlled by the seedling platform moving arm (41) and the seedling platform connecting screw (42) to make periodic reciprocating translational movements in the chute (63); The longitudinal seedling feeding mechanism (5) is fixed on both sides of the outer shell (37) of the planting box (3). The longitudinal seedling feeding mechanism (5) includes a longitudinal seedling feeding rocker (51), a connecting rod (52), a deflector plate (53), and a return spring (54). One end of the longitudinal seedling feeding rocker (51) is fixedly connected to the longitudinal seedling feeding shaft (36) in the planting box (3). The longitudinal seedling feeding rocker (51) is hinged to the deflector plate (53) through the connecting rod (52). A ratchet is provided on the deflector plate (53), which drives the seedling feeding ratchet on the planting platform mechanism (6) to achieve longitudinal seedling feeding. A return spring (54) is also provided on the deflector plate (53). The return spring (54) connects the deflector plate (53) and the frame (7) to reset the longitudinal seedling feeding mechanism (5) after rotation. The planetary gear train insertion mechanism (2) includes two elliptical gear sets (21), two cylindrical gear sets (22), a second claw (23), an insertion mechanism housing (24), and a planetary gear train insertion mechanism input shaft (25); each elliptical gear set (21) includes a driving elliptical gear and a driven elliptical gear, and each cylindrical gear set (22) includes a driving cylindrical gear and a driven cylindrical gear.

2. The device according to claim 1, wherein The lateral spacing between the two seedling openings (64) on the chute (63) is set to 300mm, which is 10mm more than the traditional seedling opening spacing of 290mm, that is, an increase of half a blanket-shaped seedling row spacing.

3. The device according to claim 1, wherein The length of the spiral groove on the guide cam screw (33) is set to 120~140mm, which is 20mm longer than the traditional spiral groove length of 100~120mm, that is, an additional blanket-shaped seedling row spacing.

4. The device according to claim 1, wherein The crank-rocker type insertion mechanism (1) includes a crank (11), a rocker (12), a first seedling claw (13), and a seedling claw connecting rod (14); the insertion arm shaft (38) is rotatably connected to one end of the crank (11), and the other end of the crank (11) is rotatably connected to the rocker (12) through the seedling claw connecting rod (14); when the crank (11) rotates around its rotation center, it drives the seedling claw connecting rod (14) and the rocker (12) to swing; the first seedling claw (13) is provided on the outside of the seedling claw connecting rod (14), and a seedling picking needle is provided on the first seedling claw (13).

5. The device for staggered planting of seedlings of claim 4, wherein The crank (11) of the crank-rocker type insertion mechanism (1) has a length of 60 mm, the rocker (12) has a length of 186 mm, and the seedling claw connecting rod (14) has a length of 145 mm.

6. The device for staggered planting of seedlings of claim 4, wherein The horizontal distance between the rotation center of the rocker arm (12) and the rotation center of the crank (11) is 115 mm, and the vertical distance is 95 mm. In the initial state, the distance from the tip of the seedling needle on the first seedling claw (13) to the driven end of the crank (11) is 220 mm, and the included angle is 45°. The included angle between the crank (11) and the ground is 268°.

7. The device according to claim 1, wherein The driving elliptical gear serves as the sun gear, and the driven elliptical gear is coaxial with the driving cylindrical gear, serving as an intermediate gear. The driven cylindrical gear serves as a planetary gear. The planting arm shaft (38) and the planetary gear train insertion mechanism (2) are connected to the input shaft (25) of the planetary gear train insertion mechanism via chain transmission. The input shaft (25) of the planetary gear train insertion mechanism is connected to the housing (24) of the insertion mechanism. The housing (24) of the insertion mechanism drives the second seedling claw (23) to move via the planetary gear train. The second seedling claw (23) is provided with a seedling picking needle.

8. The device for staggered planting of seedlings of claim 7, wherein The eccentricity of the driving elliptical gear and the driven elliptical gear in the elliptical gear set (21) is 0.38, and the major diameter is 25 mm; the diameter of the driving cylindrical gear and the driven cylindrical gear in the cylindrical gear set (22) is 50 mm.

9. The device according to claim 7, wherein The distance from the tip of the seedling picking needle on the second seedling claw (23) to the center of rotation is 110mm; in the initial state, the angle between the tip of the seedling picking needle on the second seedling claw (23) and its center of rotation is 70°; in the initial state, the housing (24) of the splitting mechanism is set perpendicular to the ground, and the angle between the active elliptical gear and the ground is 315°.

10. A method for staggered transplanting of different sizes of seedlings using the staggered transplanting device according to any one of claims 1 to 9, wherein, Specifically as follows: One end of the frame (7) is fixed to the rear end of the traction device of the hybrid rice seed production male parent transplanter; hybrid rice male parent large seedlings and small seedlings are added to the large seedling planting platform (61) and small seedling planting platform (62) respectively, and then power is input into the planting input shaft (31) to drive the crank rocker type planting mechanism (1), planetary gear planting mechanism (2), transverse seedling feeding mechanism (4) and longitudinal seedling feeding mechanism (5) to move periodically; Between the two intervals when the first seedling claw (13) of the crank-rocker type seedling insertion mechanism (1) reaches the seedling picking port (64) to pick small seedlings, the second seedling claw (23) of the planetary gear system seedling insertion mechanism (2) picks seedlings; between the two intervals when the crank (11) of the crank-rocker type seedling insertion mechanism (1) inserts small seedlings, the second seedling claw (23) of the planetary gear system seedling insertion mechanism (2) inserts large seedlings, so that large seedlings and small seedlings are distributed alternately in the paddy field.

Images