Seedling throwing machine

Abstract

The invention discloses a seedling throwing machine which comprises a seedling pulling mechanism, a belt conveyor, a seedling disc roller and a seedling separating grid plate. The seedling tray roller is installed on the rear portion of the seedling pulling mechanism, the central plane of the seedling tray roller is higher than that of the seedling pulling mechanism, the belt conveyor is installed on the rear portion of the seedling tray roller, the seedling separating grid plate is installed between the seedling pulling mechanism and the seedling tray roller, and an arc-shaped seedling tray channel is formed between the seedling tray roller and the seedling separating grid plate; the seedling pulling mechanism, the belt conveyor and the seedling tray roller rotate in the same direction, and the conveying speed of the belt conveyor is smaller than that of the seedling tray roller; the belt conveyor conveys the seedling trays to the seedling tray roller, and the seedling tray roller drives the seedling trays to be fed along the arc-shaped seedling tray channel and discharged from the lower part of the seedling tray roller; after the seedling pulling mechanism pulls out seedlings in the seedling tray upwards, the seedlings are thrown out from the upper front portion of the seedling pulling mechanism to achieve planting. A belt conveyor and seedling tray roller combined conveying mode is adopted, it is ensured that the planting distance of each row of seedlings is consistent, operation is convenient, high-speed and accurate planting can be achieved, and the planting operation effect is ensured.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery, and in particular to a rice seedling transplanter. Background Art

[0002] Prior art CN114568082A patent discloses a seedling throwing machine, which includes a conveying mechanism, a seedling pulling mechanism, and a seedling guiding device. The seedling pulling mechanism is installed at the end of the conveying mechanism, and the seedling guiding device is installed below the seedling pulling mechanism. The conveying mechanism conveys the seedling tray to the seedling pulling mechanism, and the seedling pulling mechanism pulls out the seedlings in the seedling tray and sends them to the seedling guiding device for throwing. Since the conveying mechanism adopts a grid chain for conveying, there is a gap between the front and rear seedling trays when they are conveyed on the conveying mechanism, resulting in inconsistent planting spacing of each row of seedlings. If the placement of the seedling trays is not continuous or the operation is not precise, the planting spacing of each row of seedlings is larger. Therefore, the seedling throwing machine requires precise operation when placing the seedling trays, which increases the difficulty of operation. Summary of the invention

[0003] In view of this, the present invention proposes a seedling throwing machine, which adopts a combined conveying mode of a belt conveyor and a seedling tray roller to ensure that the planting spacing of each row of seedlings is consistent, is easy to operate, can achieve high-speed and precise planting, and ensure the planting operation effect.

[0004] On the one hand, the present invention provides a seedling throwing machine, including a seedling pulling mechanism, a belt conveyor, a seedling tray drum, and a seedling dividing grid plate; the seedling tray drum is installed at the rear of the seedling pulling mechanism, the center plane of the seedling tray drum is higher than the center plane of the seedling pulling mechanism, the belt conveyor is installed at the rear of the seedling tray drum, the seedling dividing grid plate is installed between the seedling pulling mechanism and the seedling tray drum, and an arc-shaped seedling tray channel is formed between the seedling tray drum and the seedling dividing grid plate; the seedling pulling mechanism, the belt conveyor and the seedling tray drum have the same rotation direction, and the conveying speed of the belt conveyor is lower than the conveying speed of the seedling tray drum; the belt conveyor conveys the seedling tray to the seedling tray drum, and the seedling tray drum drives the seedling tray to feed along the arc-shaped seedling tray channel and discharge it from the bottom of the seedling tray drum; after the seedling pulling mechanism pulls the seedlings in the seedling tray upwards, it is thrown out from the front of the seedling pulling mechanism to achieve planting.

[0005] In order to further ensure that the planting spacing of each row of seedlings is consistent, the operation is convenient, and high-speed and accurate planting can be achieved to ensure the planting effect. In a further technical solution, the angle R5 between the belt conveyor and the horizontal plane is 1-10 degrees, and the feeding front of the belt conveyor is lower than the rear.

[0006] In order to further ensure that the spacing between seedlings in each row is consistent, the operation is convenient, and high-speed and precise planting can be achieved to ensure the effect of planting operations. In a further technical solution, the seedling tray drum includes a roller, a roller, left and right shift gears, and a driving gear. The roller is installed on the roller, the left and right shift gears are installed on the left and right sides of the roller, and the driving gear is installed on the roller; an arc is set on the seedling separation grid plate, the arc is concentric with the roller, and an arc-shaped seedling tray channel is formed between the arc and the roller, and the end of the arc-shaped seedling tray channel faces the rear horizontal direction; the seedling tray drum drives the seedling tray to feed along the arc-shaped seedling tray channel and discharge it from the rear horizontal direction below the seedling tray drum.

[0007] In order to further ensure that the spacing between each row of seedlings is consistent, the operation is convenient, high-speed and precise planting can be achieved, and the planting operation effect is guaranteed. In a further technical solution, tooth holes are opened on both sides of the seedling tray along the feeding direction, and the left and right gears are engaged with the tooth holes; seedling cultivation holes are opened in the middle of the seedling tray, and the number of rows of seedling cultivation holes is the same as the number of rows of tooth holes, and overlapping blocks are set at the four corners of the seedling tray, and the overlapping blocks extend along the feeding direction.

[0008] In order to remove the mud on the seedling pulling mechanism, in a further technical solution, a seedling cleaning drum is installed below the seedling pulling mechanism, and a mud cleaning block is installed on the seedling cleaning drum, which is used to clean the mud on the seedling pulling mechanism.

[0009] In order to further ensure that the spacing between seedlings in each row is consistent, the operation is convenient, and high-speed and accurate planting can be achieved to ensure the effect of planting operations. In a further technical solution, a groove wheel mechanism is included, which includes a groove wheel with grooves and a disc with round pins, and a driving gear is installed on the groove wheel, the driving gear is meshed with the driving gear, and the disc is connected to the seedling pulling mechanism; the seedling pulling mechanism drives the seedling disc drum to intermittently move through the groove wheel mechanism; It includes a chain, a first sprocket, a second sprocket and a third sprocket. The first sprocket is connected to a seedling pulling mechanism, the second sprocket is connected to a seedling cleaning roller, the third sprocket is connected to a belt conveyor, and the chain is installed on the first sprocket, the second sprocket and the third sprocket. The seedling pulling mechanism drives the belt conveyor and the seedling cleaning roller to rotate in the same direction and at the same speed through the chain. In order to reduce the wear of the cam profile surface of the cylindrical cam and avoid the self-rotation of the seedling clamping push rod, the reliability and safety of the equipment are improved and the service life of the equipment is extended. In a further technical scheme, the seedling pulling mechanism includes at least two seedling clamping rollers fixedly installed on the roller shaft, a left-end pressure plate fixedly installed on the left end of the roller shaft, and a right-end pressure plate fixedly installed on the right end of the roller shaft, the seedling clamping roller is located between the left-end pressure plate and the right-end pressure plate, a circular fixed seedling clamping plate is fixed on the outer circular surface of the seedling clamping roller, and a guide groove is provided on the seedling clamping roller; at least two seedling clamping push rods are installed in the seedling clamping roller, and at least two return springs and at least two movable seedling clamping plates are installed on the seedling clamping push rods, each movable seedling clamping plate is slidably matched with the seedling clamping push rod, and the left and right fixed seedling clamping plates are fixed on the outer circular surface of the seedling clamping roller. The two ends of the end return spring respectively rest between the dynamic seedling clamping plate and the left end pressure plate, and the two ends of the middle end return spring respectively rest between the two adjacent dynamic seedling clamping plates, and the dynamic seedling clamping plate is located in the guide groove; a ball retaining sleeve and a cylindrical cam are installed on the right side of the right end pressure plate, the ball retaining sleeve is fixedly connected to the right end pressure plate, and a ball is installed in the ball retaining sleeve. The ball is a spherical structure, and the ball rests on the cam contour surface of the cylindrical cam. The ball retaining sleeve and the cylindrical cam can rotate relatively to each other, the left end of the seedling clamping push rod is connected to the left end pressure plate, and the right end of the seedling clamping push rod rests on the ball.

[0010] In order to realize the process of slow loosening, long loosening, quick clamping and slow pulling of seedlings, in a further technical solution, the cylindrical cam includes a disc and a cylinder, the cylinder is fixed on the disc, and the cylinder and the disc are coaxial; the cam profile surface includes a first curved profile surface, a second curved profile surface, a first plane profile surface, and a second plane profile surface, the first curved profile surface, the second curved profile surface and the first plane profile surface are located on the end surface of the cylinder, and the second plane profile surface is located on the surface of the disc; the first curved profile surface is used to overcome the elastic force of the reset spring to push the clamping seedling push rod to move to the left to slowly loosen the seedlings; the first plane ... The first plane contour surface is used to keep the seedlings in a completely loosened state; the second curved contour surface is used to move the seedling clamping push rod to the right under the action of the elastic force of the reset spring to quickly clamp the seedlings; the second plane contour surface is used to keep the seedlings in a completely clamped state; the center angle R4 of the first plane contour surface is greater than the center angle R2 of the second plane contour surface, the center angle R3 of the first curved contour surface is more than twice the center angle R1 of the second curved contour surface, the center angle R2 of the second plane contour surface is greater than the center angle R3 of the first curved contour surface, and the cylinder height H1 is equal to the displacement stroke L1 of the dynamic seedling clamping plate.

[0011] In order to achieve the process of slow loosening, long loosening, quick clamping and slow pulling of seedlings, in a further technical scheme, the central angle R4 of the first plane contour surface is 150-170 degrees, the central angle R2 of the second plane contour surface is 90-100 degrees, the central angle R3 of the first curved contour surface is 20-30 degrees, and the central angle R1 of the second curved contour surface is 70-80 degrees; the sum of the central angle R4 of the first plane contour surface and the central angle R2 of the second plane contour surface and the central angle R3 of the first curved contour surface and the central angle R1 of the second curved contour surface is 360 degrees.

[0012] In order to reduce the cam profile of the cylindrical cam and avoid the self-rotation of the vine clamping push rod, the reliability and safety of the equipment are improved and the service life of the equipment is extended. The ball retaining sleeve includes an inner ring and an outer ring, a ring groove is formed between the inner ring and the outer ring, and the cylinder is inserted into the ring groove; a cylindrical hole is opened between the inner ring and the outer ring, and an oil nozzle hole is opened on the outer ring, the oil nozzle hole is connected to the cylindrical hole, and a lubricating oil nozzle is installed on the oil nozzle hole; the ball is located in the cylindrical hole, and the right end of the vine clamping push rod is inserted into the cylindrical hole; the roller shaft and the inner ring are fixedly connected by a positioning pin.

[0013] In order to improve the efficiency of clamping the seedlings. The seedling clamping push rods include three, which are evenly arranged; three cylindrical holes are opened between the inner ring and the outer ring, and three oil nozzle holes are opened on the outer ring, and the three oil nozzle holes are respectively connected to the three cylindrical holes. In order to improve the sealing performance, a sealing ring is installed at the right end of the seedling clamping push rod, the right end of the seedling clamping push rod is inserted into the inner ring of the sealing ring, and the outer ring of the sealing ring is inserted into the right end pressure plate. The end face of the sealing ring cooperates with the end face of the ball retaining sleeve to form a plane seal. In order to realize the relative rotation of the roller shaft and the cylindrical cam, a bearing seat is installed at the right end of the roller shaft, and the cylindrical cam is connected to the bearing seat.

[0014] Compared with the prior art, the rice seedling throwing machine of the present invention has the following beneficial effects: The present invention adopts a combined conveying mode of a belt conveyor and a seedling tray drum, and the conveying speed of the belt conveyor is lower than the conveying speed of the seedling tray drum. During the feeding process, the seedling trays are placed on the belt conveyor one by one. After the front seedling tray enters the seedling tray drum, the front end of the front seedling tray enters the arc-shaped seedling tray channel and bends and deforms, and the rear end of the front seedling tray is upturned. Since the rear seedling tray is located on the belt conveyor and the front seedling tray is located on the seedling tray drum, the speed of the rear seedling tray is greater than the speed of the front seedling tray. The front end of the rear seedling tray is inserted under the rear end of the front seedling tray, so that the front and rear end of the front and rear seedling trays are overlapped, and the distance between the front and rear end of the front and rear seedling trays is eliminated, ensuring that the planting distance of each row of seedlings is consistent, easy to operate, and can achieve high-speed and precise planting to ensure the planting operation effect.

[0015] The present invention adopts left and right shifting gears to mesh with tooth holes, and the left and right shifting gears drive the seedling tray to bend and deform along the arc-shaped seedling tray channel to feed in an orderly manner. After the seedling tray is bent and deformed along the arc-shaped seedling tray channel, the seedling cultivation hole is bent and enlarged, and the seedlings are easily pulled out of the seedling cultivation hole by the seedling pulling mechanism. The seedlings will not be damaged during the pulling process, so that high-speed and accurate planting is achieved, and the planting operation effect is guaranteed.

[0016] In the present invention, a ball is installed in a ball retaining sleeve, the ball is a spherical structure, and the ball abuts against the cam profile surface of the cylindrical cam. The ball can rotate 360 ​​degrees, and there is only rolling friction between the ball and the cam profile surface of the cylindrical cam, and there is no sliding friction, which reduces the wear of the cam profile surface of the cylindrical cam, avoids the self-rotation of the rice seedling clamping push rod, improves the reliability and safety of the equipment, and prolongs the service life of the equipment.

[0017] The first curved contour surface of the present invention is used to overcome the elastic force of the return spring to push the seedling clamping push rod to move to the left side, and slowly loosen the seedlings; the first plane contour surface is used to keep the seedlings in a completely loosened state; the second curved contour surface is used to move the seedling clamping push rod to the right side under the action of the elastic force of the return spring, and quickly clamp the seedlings; the second plane contour surface is used to keep the seedlings in a completely clamped state, realizing the process of slow loosening, long loosening, quick clamping, and slow seedling pulling, ensuring that the seedling pulling process is accurate and reliable, quick to take and slow to release, and no damage to the seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 A three-dimensional view of a rice seedling transplanter of the present invention; Figure 2 A three-dimensional view of a rice seedling transplanter of the present invention; Figure 3 for Figure 1 The main view; Figure 4 for Figure 1 Rear view of Figure 5 for Figure 1 A top view of Figure 6 for Figure 5 CC section view; Figure 7 for Figure 5 DD section view; Figure 8 for Figure 5 EE cross-sectional view; Fig. 9 for Figure 5 F magnified view; Fig.10 A three-dimensional diagram of a seedling pulling mechanism of the present invention; Fig.11 for Fig.10 The main view; Fig.12 for Fig.11 A-A sectional view; Fig.13 for Fig.11 Left view of Fig.14 for Fig.10 Schematic diagram of cylindrical cam; Fig.15 for Fig.14 Top view; Fig.16 for Fig.14Main view; Fig.17 for Fig.10 Schematic diagram of a ball retaining sleeve; Fig.18 for Fig.17 A top view of Fig.19 for Fig.18 B-B section view. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] like Figure 1 and Figure 2 and Figure 5 and Figure 6 As shown, the present invention preferably adopts a seedling throwing machine, which includes a seedling pulling mechanism 100, a belt conveyor 600, a seedling tray drum 500, and a seedling separation grid plate 400; the seedling tray drum 500 is installed on the rear of the seedling pulling mechanism 100, the center plane of the seedling tray drum 500 is higher than the center plane of the seedling pulling mechanism 100, the belt conveyor 600 is installed behind the seedling tray drum 500, the seedling separation grid plate 400 is installed between the seedling pulling mechanism 100 and the seedling tray drum 500, and an arc is formed between the seedling tray drum 500 and the seedling separation grid plate 400. Seedling tray channel 900; the seedling pulling mechanism 100, the belt conveyor 600 and the seedling tray drum 500 have the same rotation direction, and the conveying speed of the belt conveyor 600 is lower than that of the seedling tray drum 500; the belt conveyor 600 conveys the seedling tray 800 to the seedling tray drum 500, and the seedling tray drum 500 drives the seedling tray 800 to be fed along the arc-shaped seedling tray channel 900 and discharged from the bottom of the seedling tray drum 500; after the seedling pulling mechanism 100 pulls the seedlings in the seedling tray 800 upwards, it is thrown out from the upper front of the seedling pulling mechanism 100 to achieve planting.

[0021] like Figure 2 As shown, the seedling cleaning drum 200 is installed below the seedling pulling mechanism 100, and a mud cleaning block 201 is installed on the seedling cleaning drum 200, and the mud cleaning block 201 is used to clean the mud on the seedling pulling mechanism 100. Figure 2 and Figure 4 As shown, it includes a groove wheel mechanism 700, which includes a groove wheel 702 with grooves and a disc 701 with a round pin. A driving gear is installed on the groove wheel 702, which meshes with the driving gear 502. The disc 701 is connected to the seedling pulling mechanism 100; the seedling pulling mechanism 100 drives the seedling tray drum 500 to intermittently move through the groove wheel mechanism 700. Figure 3As shown, it comprises a chain 1000, a first sprocket 101, a second sprocket 202, and a third sprocket 601. The first sprocket 101 is connected to the seedling pulling mechanism 100, the second sprocket 202 is connected to the seedling cleaning drum 200, and the third sprocket 601 is connected to the belt conveyor 600. The chain 1000 is mounted on the first sprocket 101, the second sprocket 202, and the third sprocket 601. The seedling pulling mechanism 100 drives the belt conveyor (600) and the seedling cleaning drum 200 to rotate in the same direction and at the same speed through the chain (1000).

[0022] The present invention adopts a belt conveyor and a seedling tray drum combined conveying mode. The seedling pulling mechanism 100, the belt conveyor 600, the seedling tray drum 500 and the seedling cleaning drum 200 rotate in the same direction. The seedling pulling mechanism 100, the belt conveyor 600 and the seedling cleaning drum 200 rotate in the same direction and at the same speed. Since the seedling pulling mechanism 100 drives the seedling tray drum 500 to intermittently move through the groove wheel mechanism 700, the conveying speed of the belt conveyor 600 is lower than the conveying speed of the seedling tray drum 500. During the feeding process, the seedling trays 800 are placed one by one on the belt conveyor 600. After the front seedling tray 800 enters the seedling tray drum 500, the front end of the front seedling tray 800 enters the arc-shaped seedling tray channel 900 and bends and deforms, and the rear end of the front seedling tray 800 is upturned. Since the rear seedling tray 800 is located on the belt conveyor 600 and the front seedling tray 800 is located on the seedling tray drum 500, the speed of the rear seedling tray 800 is greater than that of the front seedling tray 800, and the front end of the rear seedling tray 800 is inserted under the rear end of the front seedling tray 800, so that the front and rear ends of the front and rear seedling trays 800 are overlapped, and the front and rear end spacing of the front and rear seedling trays 800 is eliminated. It ensures that the planting spacing of each row of seedlings is consistent, the operation is convenient, and high-speed and accurate planting can be achieved to ensure the planting operation effect.

[0023] In order to achieve the front and rear end overlap of the front and rear seedling trays 800 and eliminate the front and rear end spacing of the front and rear seedling trays 800, in a further technical solution, as Figure 7 As shown, the angle R5 between the belt conveyor 600 and the horizontal plane is 3 degrees, and the feeding front of the belt conveyor 600 is lower than the rear, so that the front end of the rear seedling tray 800 is inserted under the rear end of the front seedling tray 800, which makes it easy to achieve the front and rear end overlap of the front and rear seedling trays 800 and eliminate the front and rear end spacing of the front and rear seedling trays 800.

[0024] like Figure 8As shown, the seedling tray drum 500 includes a roller 501, a roller 504, left and right shift gears 503, and a driving gear 502. The roller 504 is mounted on the roller 501, the left and right shift gears 503 are mounted on the left and right sides of the roller 504, and the driving gear 502 is mounted on the roller 501. An arc 401 is provided on the seedling separation grid plate 400. The arc 401 is cocentric with the roller 504. An arc-shaped seedling tray channel 900 is formed between the arc 401 and the roller 504. The end of the arc-shaped seedling tray channel 900 faces the rear horizontal direction. The seedling tray drum 500 drives the seedling tray 800 to feed along the arc-shaped seedling tray channel 900 and discharge it from the rear horizontal direction below the seedling tray drum 500. Fig. 9 As shown, tooth holes 803 are provided on both sides of the seedling tray 800 along the feeding direction, and the left and right shifting gears 503 mesh with the tooth holes 803. Seedling cultivation holes 802 are provided in the middle of the seedling tray 800, and the number of rows of seedling cultivation holes 802 is the same as the number of rows of tooth holes 803. In order to facilitate the front and rear ends of the front and rear seedling trays 800 to overlap, overlapping blocks 801 are provided at the four corners of the seedling tray 800, and the overlapping blocks 801 extend along the feeding direction.

[0025] The present invention adopts the left and right shifting gears 503 to mesh with the tooth holes 803, and the left and right shifting gears 503 drive the seedling tray 800 to bend and deform along the arc-shaped seedling tray channel 900 to feed in an orderly manner. After the seedling tray 800 is bent and deformed along the arc-shaped seedling tray channel 900, the seedling cultivation hole 802 is bent and enlarged, and the seedlings are easily pulled out of the seedling cultivation hole 802 by the seedling pulling mechanism 100. The seedlings will not be damaged during the pulling process, so that high-speed and accurate planting is achieved, and the planting operation effect is guaranteed.

[0026] like Fig.10 and Fig.11 and Fig.12 and Fig.13 As shown, the seedling pulling mechanism 100 includes 21 seedling clamping rollers 6 fixedly mounted on the roller shaft 1, a left end pressure plate 7 fixedly mounted on the left end of the roller shaft 1, and a right end pressure plate 11 fixedly mounted on the right end of the roller shaft 1. The 21 seedling clamping rollers 6 are located between the left end pressure plate 7 and the right end pressure plate 11, and a circular fixed seedling clamping plate 61 is fixed on the outer circumferential surface of the seedling clamping roller 6. A guide groove 60 is provided on the seedling clamping roller 6; three fixing rods 9 are fixed in the 21 seedling clamping rollers 6, and the two ends of the three fixing rods 9 are respectively connected and fixed to the left end pressure plate 7 and the right end pressure plate 11, so as to connect and fix the 21 seedling clamping rollers 6. The 21 seedling clamping rollers 6 can pull out 21 seedlings by rotating one circle. The present invention adopts a plurality of seedling clamping rollers 6 to be assembled with each other, and the corresponding number of seedling clamping rollers 6 is assembled according to actual needs. Each seedling clamping roller 6 has the same structure, and modular production is realized, which reduces production cost and maintenance cost.

[0027] Three seedling clamping push rods 8 are installed in the seedling clamping roller 6. The three seedling clamping push rods 8 are evenly arranged and the interval angle of the three seedling clamping push rods 8 is 120 degrees. Seven return springs 80 and seven movable seedling clamping plates 81 are installed on the seedling clamping push rods 8. Each movable seedling clamping plate 81 is slidably matched with the seedling clamping push rods 8. The two ends of the left end return spring 80 are respectively against the movable seedling clamping plate 81 and the left end pressure plate 7. The two ends of the middle end return spring 80 are respectively against the adjacent two movable seedling clamping plates 81. The movable seedling clamping plate 81 is located in the guide groove 60. Rotating 120 degrees can pull out 7 seedlings, and rotating 360 degrees can pull out 21 seedlings.

[0028] like Fig.12 As shown, a ball retaining sleeve 4 and a cylindrical cam 3 are installed on the right side of the right end pressure plate 11, the ball retaining sleeve 4 is fixedly connected to the right end pressure plate 11, a ball 10 is installed in the ball retaining sleeve 4, the ball 10 is a spherical structure, the ball 10 abuts against the cam profile surface of the cylindrical cam 3, the ball retaining sleeve 4 and the cylindrical cam 3 can rotate relatively, the left end of the vine clamping push rod 8 is connected to the left end pressure plate 7, and the right end of the vine clamping push rod 8 abuts against the ball 10. The ball 10 can rotate 360 ​​degrees, and there is only rolling friction between the ball 10 and the cam profile surface of the cylindrical cam 3, and there is no sliding friction, which reduces the wear of the cam profile surface of the cylindrical cam 3, avoids the self-rotation of the vine clamping push rod, improves the reliability and safety of the equipment, and extends the service life of the equipment. A sealing ring 13 is installed at the right end of the rice-clamping push rod 8, the right end of the rice-clamping push rod 8 is inserted into the inner ring of the sealing ring 13, the outer ring of the sealing ring 13 is inserted into the right end pressure plate 11, and the end face of the sealing ring 13 cooperates with the end face of the ball retaining sleeve 4 to form a plane seal. A bearing seat 2 is installed at the right end of the roller shaft 1, and a cylindrical cam 3 is connected to the bearing seat 2.

[0029] like Fig.14 and Fig.15 and Fig.16As shown, the cylindrical cam 3 includes a disc 31 and a cylinder 30, the cylinder 30 is fixed on the disc 31, and the cylinder 30 is coaxial with the disc 31; the cam profile surface includes a first curved profile surface 300, a second curved profile surface 302, a first plane profile surface 301, and a second plane profile surface, the first curved profile surface 300, the second curved profile surface 302 and the first plane profile surface 301 are located on the end surface of the cylinder 30, and the second plane profile surface is located on the surface of the disc 31; the first curved profile surface 300 is used to overcome the elastic force of the reset spring 80 to push the clamping seedling push rod 8 to move to the left side, and slowly release the seedlings; the first plane profile surface 301 01 is used to keep the seedlings in a completely loosened state; the second curved contour surface 302 is used to move the seedling clamping push rod 8 to the right under the elastic force of the reset spring 80 to quickly clamp the seedlings; the second plane contour surface is used to keep the seedlings in a completely clamped state; the center angle R4 of the first plane contour surface 301 is greater than the center angle R2 of the second plane contour surface, the center angle R3 of the first curved contour surface 300 is more than twice the center angle R1 of the second curved contour surface 302, the center angle R2 of the second plane contour surface is greater than the center angle R3 of the first curved contour surface 300, and the height H1 of the cylinder 30 is equal to the displacement stroke L1 of the dynamic seedling clamping plate 81. The center angle R4 of the first plane contour surface 301 is 160 degrees, the center angle R2 of the second plane contour surface is 95 degrees, the center angle R3 of the first curved contour surface 300 is 25 degrees, and the center angle R1 of the second curved contour surface 302 is 80 degrees; the sum of the center angle R4 of the first plane contour surface 301, the center angle R2 of the second plane contour surface, the center angle R3 of the first curved contour surface 300, and the center angle R1 of the second curved contour surface 302 is 360 degrees. The process of slow loosening, long loosening, fast clamping, and slow pulling of seedlings is realized, ensuring that the pulling process is accurate and reliable, fast picking and slow release, and no damage to the seedlings.

[0030] like Fig.17 and Fig.18 and Fig.19 As shown, the ball retaining sleeve 4 includes an inner ring 44 and an outer ring 43, an annular groove 40 is formed between the inner ring 44 and the outer ring 43, and the cylinder 30 is inserted into the annular groove 40; three cylindrical holes 41 are opened between the inner ring 44 and the outer ring 43, and three oil nozzle holes 42 are opened on the outer ring 43, the oil nozzle holes 42 are communicated with the cylindrical holes 41, and three lubricating oil nozzles 5 are installed on the three oil nozzle holes 42. Lubricating oil is injected into the cylindrical hole 41 through the three lubricating oil nozzles 5. The ball 10 is located in the cylindrical hole 41, and the right ends of the three vine clamping push rods 8 are inserted into the three cylindrical holes 41; the roller shaft 1 is fixedly connected to the inner ring 44 by the positioning pin 12. The self-rotation of the vine clamping push rod is avoided, the reliability and safety of the equipment are improved, and the service life of the equipment is extended.

[0031] The working process of the seedling pulling mechanism 100 of the present invention is as follows: the roller shaft 1 drives 21 seedling clamping rollers 6, the seedling clamping push rod 8 and the ball retaining sleeve 4 to rotate, the cylindrical cam 3 is fixed, and the ball 10 rolls on the cam contour surface. The ball 10 has rolling friction relative to the right end of the seedling clamping push rod 8, and the ball 10 has rolling friction relative to the cam contour surface. There is no sliding friction, which reduces the wear of the cam contour surface of the cylindrical cam 3, avoids the self-rotation of the seedling clamping push rod, improves the reliability and safety of the equipment, and extends the service life of the equipment. The first curved contour surface 300 overcomes the elastic force of the return spring 80 to push the rolling ball 10 and the seedling clamping push rod 8 to move to the left, the dynamic seedling clamping plate 81 moves to the left, the gap between the dynamic seedling clamping plate 81 and the fixed seedling clamping plate 61 increases, the seedlings are slowly released, and a slow loosening process is achieved; then, the rolling ball 10 is located on the first plane contour surface 301, and the seedlings remain in a completely loosened state, achieving a long-term loosened state; then, the rolling ball 10 is located on the second curved contour surface 302, and the seedling clamping push rod 8 moves to the right under the elastic force of the return spring 80, the gap between the dynamic seedling clamping plate 81 and the fixed seedling clamping plate 61 decreases, and the seedlings are quickly clamped to achieve a quick clamping process; finally, the roller shaft 1 continues to rotate, the rolling ball 10 is located on the second plane contour surface, the seedlings remain in a completely clamped state, and the seedlings are slowly pulled out, ensuring that the seedling pulling process is accurate and reliable, quick to take and slow to release, and no damage to the seedlings.

[0032] The above-mentioned technologies are common knowledge to those skilled in the art. The above-mentioned are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rice seedling throwing machine, characterized in that: The invention comprises a seedling pulling mechanism (100), a belt conveyor (600), a seedling tray roller (500), and a seedling separation grid plate (400); the seedling tray roller (500) is installed on the rear of the seedling pulling mechanism (100), the center plane of the seedling tray roller (500) is higher than the center plane of the seedling pulling mechanism (100), the belt conveyor (600) is installed behind the seedling tray roller (500), the seedling separation grid plate (400) is installed between the seedling pulling mechanism (100) and the seedling tray roller (500), and an arc-shaped seedling tray channel (900) is formed between the seedling tray roller (500) and the seedling separation grid plate (400). The seedling pulling mechanism (100), the belt conveyor (600) and the seedling tray drum (500) rotate in the same direction, and the conveying speed of the belt conveyor (600) is lower than the conveying speed of the seedling tray drum (500); the belt conveyor (600) conveys the seedling tray (800) to the seedling tray drum (500), and the seedling tray drum (500) drives the seedling tray (800) to be fed along the arc-shaped seedling tray channel (900) and discharged from the bottom of the seedling tray drum (500); after the seedling pulling mechanism (100) pulls the seedlings in the seedling tray (800) upwards, the seedlings are thrown out from the front of the seedling pulling mechanism (100) to achieve planting.

2. A rice seedling throwing machine according to claim 1, characterized in that: The angle R5 between the belt conveyor (600) and the horizontal plane is 1-10 degrees, and the feeding front of the belt conveyor (600) is lower than the rear.

3. A rice seedling throwing machine according to claim 1, characterized in that: The seedling tray drum (500) comprises a roller (501), a roller (504), left and right shifting gears (503), and a driving gear (502); the roller (504) is mounted on the roller (501); the left and right shifting gears (503) are mounted on the left and right sides of the roller (504); and the driving gear (502) is mounted on the roller (501); an arc (401) is arranged on the seedling separation grid plate (400); the arc (401) and the roller (504) are concentric; an arc-shaped seedling tray channel (900) is formed between the arc (401) and the roller (504); and the end of the arc-shaped seedling tray channel (900) faces in a rearward horizontal direction; the seedling tray drum (500) drives the seedling tray (800) to be fed along the arc-shaped seedling tray channel (900) and discharged in a rearward horizontal direction from below the seedling tray drum (500).

4. A rice seedling throwing machine according to claim 3, characterized in that: Tooth holes (803) are provided on both sides of the seedling tray (800) along the feeding direction, and the left and right shift gears (503) mesh with the tooth holes (803); seedling cultivation holes (802) are provided in the middle of the seedling tray (800), and the number of rows of the seedling cultivation holes (802) is the same as the number of rows of the tooth holes (803); overlapping blocks (801) are provided at the four corners of the seedling tray (800), and the overlapping blocks (801) extend along the feeding direction.

5. A rice seedling throwing machine according to claim 3, characterized in that: The seedling cleaning roller (200) is installed below the seedling pulling mechanism (100), and a mud cleaning block (201) is installed on the seedling cleaning roller (200), and the mud cleaning block (201) is used to clean the mud on the seedling pulling mechanism (100).

6. A rice seedling throwing machine according to claim 5, characterized in that: The invention comprises a grooved wheel mechanism (700), wherein the grooved wheel mechanism (700) comprises a grooved wheel (702) with grooves and a disc (701) with a round pin, wherein a driving gear is mounted on the grooved wheel (702), the driving gear is meshed with a driving gear (502), and the disc (701) is connected to a seedling pulling mechanism (100); the seedling pulling mechanism (100) drives the seedling disc roller (500) to intermittently move through the grooved wheel mechanism (700); The invention comprises a chain (1000), a first sprocket (101), a second sprocket (202), and a third sprocket (601); the first sprocket (101) is connected to a seedling pulling mechanism (100); the second sprocket (202) is connected to a seedling cleaning roller (200); the third sprocket (601) is connected to a belt conveyor (600); the chain (1000) is mounted on the first sprocket (101), the second sprocket (202), and the third sprocket (601); and the seedling pulling mechanism (100) drives the belt conveyor (600) and the seedling cleaning roller (200) to rotate in the same direction and at the same speed via the chain (1000).

7. A rice seedling throwing machine according to claim 1, characterized in that: The seedling pulling mechanism (100) comprises at least two seedling clamping rollers (6) fixedly mounted on a roller shaft (1), a left end pressure plate (7) fixedly mounted on the left end of the roller shaft (1), a right end pressure plate (11) fixedly mounted on the right end of the roller shaft (1), the seedling clamping roller (6) being located between the left end pressure plate (7) and the right end pressure plate (11), a circular fixed seedling clamping plate (61) being fixed on the outer circumferential surface of the seedling clamping roller (6), and a guide groove (60) being provided on the seedling clamping roller (6); at least two seedling clamping push rods (8) being mounted inside the seedling clamping roller (6), at least two return springs (80) and at least two movable seedling clamping plates (81) being mounted on the seedling clamping push rod (8), each movable seedling clamping plate (81) being slidably matched with the seedling clamping push rod (8), and the left end return spring (80) being in a position to move the seedling clamping plate (81) and the seedling clamping plate (81) being in a position to move the seedling clamping plate (81) and the seedling clamping push rod (8). The two ends respectively abut between the movable seedling clamping plate (81) and the left end pressure plate (7); the two ends of the middle end return spring (80) respectively abut between two adjacent movable seedling clamping plates (81); the movable seedling clamping plate (81) is located in the guide groove (60); a ball retaining sleeve (4) and a cylindrical cam (3) are installed on the right side of the right end pressure plate (11); the ball retaining sleeve (4) is fixedly connected to the right end pressure plate (11); a ball (10) is installed in the ball retaining sleeve (4); the ball (10) is a spherical structure; the ball (10) abuts against the cam profile surface of the cylindrical cam (3); the ball retaining sleeve (4) and the cylindrical cam (3) can rotate relative to each other; the left end of the seedling clamping push rod (8) is connected to the left end pressure plate (7); and the right end of the seedling clamping push rod (8) abuts against the ball (10).

8. The seedling pulling mechanism according to claim 7, characterized in that: The cylindrical cam (3) comprises a disc (31) and a cylinder (30), the cylinder (30) being fixed on the disc (31), and the cylinder (30) and the disc (31) being coaxial; the cam profile surface comprises a first curved profile surface (300), a second curved profile surface (302), a first plane profile surface (301), and a second plane profile surface; the first curved profile surface (300), the second curved profile surface (302), and the first plane profile surface (301) are located on the end surface of the cylinder (30), and the second plane profile surface is located on the surface of the disc (31); the first curved profile surface (300) is used to overcome the elastic force of the return spring (80) to push the seedling clamping push rod (8) to move to the left side, thereby slowly releasing the seedlings; The planar contour surface (301) is used to keep the seedlings in a completely loosened state; the second curved contour surface (302) is used to move the seedling clamping push rod (8) to the right under the elastic force of the return spring (80) to quickly clamp the seedlings; the second planar contour surface is used to keep the seedlings in a completely clamped state; the center angle R4 of the first planar contour surface (301) is greater than the center angle R2 of the second planar contour surface, the center angle R3 of the first curved contour surface (300) is greater than twice the center angle R1 of the second curved contour surface (302), the center angle R2 of the second planar contour surface is greater than the center angle R3 of the first curved contour surface (300), and the height H1 of the cylinder (30) is equal to the displacement stroke L1 of the movable seedling clamping plate (81).

9. The seedling pulling mechanism according to claim 8, characterized in that: The center angle R4 of the first planar contour surface (301) is 150-170 degrees, the center angle R2 of the second planar contour surface is 90-100 degrees, the center angle R3 of the first curved contour surface (300) is 20-30 degrees, and the center angle R1 of the second curved contour surface (302) is 70-80 degrees; the sum of the center angle R4 of the first planar contour surface (301) and the center angle R2 of the second planar contour surface, the center angle R3 of the first curved contour surface (300) and the center angle R1 of the second curved contour surface (302) is 360 degrees; The ball retaining sleeve (4) comprises an inner ring (44) and an outer ring (43); an annular groove (40) is formed between the inner ring (44) and the outer ring (43); a cylinder (30) is inserted into the annular groove (40); a cylindrical hole (41) is formed between the inner ring (44) and the outer ring (43); an oil nozzle hole (42) is formed on the outer ring (43); the oil nozzle hole (42) is communicated with the cylindrical hole (41); a lubricating oil nozzle (5) is installed on the oil nozzle hole (42); the ball (10) is located in the cylindrical hole (41); the right end of the rice seedling clamping push rod (8) is inserted into the cylindrical hole (41); the roller shaft (1) is fixedly connected to the inner ring (44) by a positioning pin (12).

10. The seedling pulling mechanism according to claim 9, characterized in that: The seedling clamping push rods (8) include three, and the three seedling clamping push rods (8) are evenly arranged; three cylindrical holes (41) are opened between the inner ring (44) and the outer ring (43); three oil nozzle holes (42) are opened on the outer ring (43); the three oil nozzle holes (42) are respectively communicated with the three cylindrical holes (41); a sealing ring (13) is installed at the right end of the seedling clamping push rod (8); the right end of the seedling clamping push rod (8) is inserted into the inner ring of the sealing ring (13); the outer ring of the sealing ring (13) is inserted into the right end pressure plate (11); the end surface of the sealing ring (13) cooperates with the end surface of the ball retaining sleeve (4) to form a plane seal; a bearing seat (2) is installed at the right end of the roller shaft (1); and the cylindrical cam (3) is connected to the bearing seat (2).

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