CN111226551B - Seedling box of rice pot seedling transplanter and working method thereof - Google Patents
Seedling box of rice pot seedling transplanter and working method thereof Download PDFInfo
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- CN111226551B CN111226551B CN201910322556.5A CN201910322556A CN111226551B CN 111226551 B CN111226551 B CN 111226551B CN 201910322556 A CN201910322556 A CN 201910322556A CN 111226551 B CN111226551 B CN 111226551B
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- seedling
- shaft
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- seedling tray
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C11/00—Transplanting machines
- A01C11/003—Transplanting machines for aquatic plants; for planting underwater, e.g. rice
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C11/00—Transplanting machines
- A01C11/006—Other parts or details or planting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
- B65G25/02—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having different forward and return paths of movement, e.g. walking beam conveyors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transplanting Machines (AREA)
Abstract
The invention discloses a seedling box of a rice pot seedling transplanter and a working method thereof. The existing seedling box has low precision. The invention comprises a seedling box body, a driving seedling tray conveying mechanism, a driven seedling tray conveying mechanism, a seedling tray conveying gear mechanism, a transverse box moving mechanism and a longitudinal ratchet wheel shifting mechanism. The seedling tray conveying gear mechanism adopts a movement mode similar to a gear rack to drive the seedling tray to feed, each tooth of the gear corresponds to each row of seedling holes on the seedling tray, accurate stepping seedling feeding is realized, and compared with the traditional feeding and seedling feeding mode of a chain and an iron wire, the stability is higher, and the seedling feeding accuracy is improved; the driven seedling tray conveying mechanism adopts the combination of the gear, the ratchet wheel and the pawl, and if the phenomenon of missed seedling tray placement occurs, the seedling tray is pushed manually to connect the previous seedling tray, so that the problem that a gap exists between two seedling trays due to missed seedling tray placement and then a section of distance in a planting process field is short is avoided.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a seedling box of a rice pot seedling transplanter and a working method thereof.
Background
Nowadays, rice pot seedling transplanting machinery is continuously developed, and when a transplanting arm is rapidly developed, the rough mode of conveying pot seedlings by using a seedling box with chains and iron wires in the past cannot be accurately matched with the movement of a seedling taking and transplanting mechanism. The seedling box technology is a key technology of the pot seedling transplanter, and compared with a common felt-type seedling transplanter, the key technical difficulties of the pot seedling transplanter are a pot seedling tray accurate stepping seedling feeding technology, a seedling tray returning technology, a seedling tray seedling feeding repeated positioning precision technology and the like. The prior pot seedling transplanter has larger operation error, and the old seedling box seedling feeding structure needs to be improved.
Disclosure of Invention
The invention aims to provide a seedling box of a pot seedling transplanter and a working method thereof, which can realize accurate stepping seedling feeding, accurate repeated positioning, seedling disc returning and gapless disc supplement.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention relates to a seedling box of a rice pot seedling transplanter, which comprises a seedling box body, a driving seedling plate conveying mechanism, a driven seedling plate conveying mechanism, a seedling box base, a seedling plate conveying gear mechanism, a transverse box moving mechanism, a box moving guide rail support frame, a longitudinal ratchet wheel shifting mechanism, a pressure plate assembly, a seedling box support rod and a seedling box support wheel; the guide rail is fixed on the top of the seedling box base, the upper end of the box-moving guide rail support frame is fixed on the seedling box body, and the lower end of the box-moving guide rail support frame and the guide rail form a sliding pair. The seedling box supporting rod is fixed on the seedling box base; the seedling box supporting wheel is fixed at the lower end of the seedling box body and forms a sliding pair with the seedling box supporting rod. The seedling box supporting rod is arranged at the front part of the seedling box base, and the guide rail is arranged at the rear part of the seedling box base.
The driving seedling tray conveying mechanism comprises a driving seedling feeding shaft A, a driving seedling feeding shaft B, a seedling tray turning and poking disc, a seedling tray conveying gear mechanism, a chain wheel A, a chain wheel B and a chain. n seedling disc turning and poking discs are fixed on the driving seedling feeding shaft A at equal intervals, and n is more than or equal to 5; the active seedling feeding shaft A is supported at the lower end of the seedling box body through a bearing; the chain wheel B is fixed at the right end of the driving seedling feeding shaft A, the driving seedling feeding shaft B is supported on the seedling box body through a bearing, two seedling tray conveying gear mechanisms with the distance of H are arranged on the driving seedling feeding shaft B, the chain wheels A are fixed at the two ends of the driving seedling feeding shaft B, and the chain wheel B at the right end of the driving seedling feeding shaft A is connected with the chain wheel A at the right end of the driving seedling feeding shaft B through a chain.
The driven seedling tray conveying mechanism comprises a driven seedling conveying shaft A, a driven seedling conveying shaft B, a seedling tray conveying gear mechanism, a chain wheel A and a chain. The driven seedling feeding shaft A and the driven seedling feeding shaft B are supported on a seedling box body through bearings, and the driving seedling feeding shaft A, the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B are sequentially arranged from the lower end to the upper end of the seedling box body; two seedling tray conveying gear mechanisms with the distance H are arranged on the driven seedling conveying shaft A and the driven seedling conveying shaft B, chain wheels A are fixed at two ends of the driven seedling conveying shaft A, a chain wheel A is fixed at the right end of the driven seedling conveying shaft B, the chain wheel A at the left end of the driven seedling conveying shaft A is connected with the chain wheel A at the left end of the driving seedling conveying shaft B through a chain, and the chain wheel A at the right end of the driven seedling conveying shaft A is connected with the chain wheel A at the right end of the driven seedling conveying shaft B through a chain.
The seedling tray conveying gear mechanism comprises eight-tooth gears, a seedling tray conveying ratchet wheel, a seedling tray conveying pawl and a gear inner bearing. The eight-tooth gear is hinged with the tail part of the seedling tray conveying pawl and is connected with the head part of the seedling tray conveying pawl through a spring, and the head part of the seedling tray conveying pawl is embedded into one tooth of the seedling tray conveying ratchet wheel. Eight-tooth gears of the two seedling tray conveying gear mechanisms are respectively supported on the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B through gear inner bearings, and the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B are respectively fixed with seedling tray conveying ratchet wheels of the two seedling tray conveying gear mechanisms; the rotating directions of all the seedling tray conveying ratchet wheels are consistent and are opposite to the rotating directions of the bidirectional spiral shafts of the transverse box moving mechanism.
The transverse box moving mechanism comprises a sliding block, a bearing seat, a bidirectional screw shaft and a swinging rod; the bidirectional screw shaft is supported on a bearing seat through a bearing, and the bearing seat is fixed on a seedling box base; the sliding block is fixed with the box moving guide rail supporting frame and forms a screw pair with the bidirectional screw shaft; the swing rod is fixed at one end of the bidirectional screw shaft, and the driving gear is fixed at the other end of the bidirectional screw shaft.
The longitudinal ratchet wheel shifting mechanism comprises a shifting shaft, a shifting fork, a connecting rod, a driving pawl, a driven oscillating bar, a driving ratchet wheel, a stopping pawl, a positioning rod and a driving oscillating bar; the shifting shaft and the seedling box body form a revolute pair, and the two shifting forks are fixed at the two ends of the shifting shaft; one end of the driving swing rod is fixed on the shifting shaft, and the other end of the driving swing rod is hinged with one end of the connecting rod; the other end of the connecting rod is fixed with a hinged shaft A, the hinged shaft A and one end of the driven swing rod form a revolute pair, and the tail end of the driving pawl is sleeved on the hinged shaft A and is connected with the hinged shaft A through a torsional spring A; the other end of the driven swing rod and the left end of the driving seedling feeding shaft A form a rotating pair; the stopping ratchet wheel and the driving ratchet wheel are both fixed at the left end of the active seedling feeding shaft A; the rotation direction of the stop ratchet wheel is opposite to the rotation direction of the bidirectional screw shaft, and the rotation direction of the drive ratchet wheel is the same as the rotation direction of the bidirectional screw shaft; the head end of the driving pawl is embedded into one tooth of the driving ratchet wheel; two ends of the positioning rod are respectively sleeved on the shifting shaft and the driving seedling feeding shaft A in a hollow manner, and the positioning rod is connected with the shifting shaft through a torsion spring B; the middle part of the positioning rod is fixed with a hinged shaft B; the tail part of the stopping pawl and the articulated shaft B form a revolute pair and are connected with the articulated shaft B through a torsional spring C; one claw of the head of the stopping pawl is embedded into one tooth of the stopping ratchet wheel; one end of the unlocking part is fixed in the middle of the connecting rod, and the other end of the unlocking part is contacted with the side surface of the other claw at the head of the stopping pawl, which is close to the stopping ratchet wheel.
The pressure plate assembly comprises a pressure plate, a pressure plate iron wire and a pressure plate support frame. The two pressure plate support frames are arranged at intervals, and two ends of each pressure plate support frame are fixed on two sides of the seedling box body through screws; two pressure plate plates are fixed on each pressure plate support frame at intervals. The lower ends of every two pressure plate plates aligned on the support frames of different pressure plate plates are fixed by a pressure plate iron wire. The plastic seedling tray guiding platform is fixed at the top end of the pressure plate supporting platform. The pressure plate supporting platform is fixed on the seedling box body and is arranged at a distance from the bottom surface of the inner wall of the seedling box body; six notches A arranged in an array are formed in the pressure plate supporting platform, eight-tooth gears of the six seedling tray conveying gear mechanisms are arranged in the corresponding notches A respectively, and the eight-tooth gears protrude out of the top surface of the pressure plate supporting platform. The pressure plate supporting platform is further provided with n notches B which are arranged at equal intervals, n seedling plate turning stirring plates are arranged in the corresponding notches B respectively, and the height of the seedling plate turning stirring plates, which protrudes out of the top surface of the pressure plate supporting platform, is greater than the height of the eight-tooth gear, which protrudes out of the top surface of the pressure plate supporting platform.
The two end faces of the seedling tray turning poking disc are respectively provided with a plurality of right-angled triangular convex strip groups which are integrally formed and are uniformly distributed along the circumferential direction; the right-angled triangle convex strip group comprises a right-angled triangle convex strip A and a right-angled triangle convex strip B, the right-angled triangle convex strip A and the right-angled triangle convex strip B are arranged along the radial direction, the right-angled triangle convex strip A inclines inwards, and the right-angled triangle convex strip B inclines outwards; the hypotenuse of the right triangle convex strip A is crossed with that of the right triangle convex strip B, and the hypotenuse of the right triangle convex strip B is more than three times that of the right triangle convex strip A; the outermost points of the right-angled triangle convex strip A and the right-angled triangle convex strip B are positioned in the same plane.
The value of H is one third of the length of the active seedling feeding shaft B.
The working method of the seedling box of the rice pot seedling transplanter comprises the following specific steps:
the seedling tray is put in by the plastic seedling tray guide platform and is pressed by the pressure plate iron wire; then the seedling tray is pushed manually, so that the bottom of the seedling tray is pressed on the seedling tray turning poking disc. The power is input by the driving gear to drive the bidirectional screw shaft to rotate, thereby driving the slide block and the seedling box body to move left and right. When the seedling box body moves to the leftmost end or the rightmost end, the swinging rod strikes a shifting fork fixed on the shifting shaft to enable the shifting shaft to rotate. The poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism to rotate, so that the driving seedling feeding shaft A rotates to drive the seedling tray turning poking disc on the driving seedling feeding shaft to rotate, and the seedling tray turning poking disc generates poking force to the bottom of the seedling tray to advance the seedling tray, thereby achieving the purpose of feeding and changing seedlings. The driving seedling conveying shaft A rotates to drive a chain wheel B on the driving seedling conveying shaft A to rotate, the chain wheel B drives a chain wheel A at the right end of the driving seedling conveying shaft B to rotate through a chain, the chain wheel A at the left end of the driving seedling conveying shaft B drives a chain wheel A at the left end of the driven seedling conveying shaft A to rotate through the chain, and the chain wheel A at the right end of the driven seedling conveying shaft A drives a chain wheel A at the right end of the driven seedling conveying shaft B to rotate through the chain; the rotation of the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B drives the seedling tray conveying ratchet wheels on the respective shafts to rotate, the eight-tooth gear rotates by one tooth through the acting force of the seedling tray conveying ratchet wheel and the seedling tray conveying pawl, and the eight-tooth gear moves by meshing with the seedling tray to achieve the aim of accurately advancing the seedling tray by one line for seedling feeding. When the seedling box body moves from the leftmost end or the rightmost end to the middle, the shifting fork loses the force given by the swinging rod, the shifting shaft rotates and resets, but the longitudinal ratchet shifting mechanism does not drive the active seedling feeding shaft A to rotate at the moment.
When a space is formed between two seedling trays on the pressure plate supporting platform, the next seedling tray is pushed forwards by external force, the next seedling tray and the eight-tooth gear move to drive the eight-tooth gear to rotate, and the seedling tray conveying pawl on the eight-tooth gear rotates along the seedling tray conveying ratchet wheel, so that the seedling tray conveying ratchet wheel cannot be acted, the eight-tooth gear and the next seedling tray smoothly move forwards until the next seedling tray moves to be contacted with the previous seedling tray, and the gap between the two seedling trays is eliminated.
The process that the poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism to operate is as follows: the poking shaft rotates to enable the driving swing rod to swing, the driving swing rod drives the unlocking part fixed on the connecting rod to move backwards together, the unlocking part enables the stopping pawl to rotate away from the stopping ratchet wheel to achieve the purpose of unlocking, the driven swing rod swings to enable the driving pawl to push the driving ratchet wheel fixed on the driving seedling feeding shaft A to rotate, and the driving seedling feeding shaft A rotates to achieve the purpose of feeding seedlings. When the shifting shaft rotates and resets, the driving swing rod, the connecting rod, the unlocking part, the stopping pawl, the driven swing rod and the driving pawl all reset, the driving pawl is embedded into the next tooth of the driving ratchet wheel, and the stopping pawl blocks the next tooth of the stopping ratchet wheel to achieve the purpose of stopping.
The invention has the beneficial effects that:
1. the seedling tray conveying gear mechanism adopts a movement mode similar to a gear rack to drive the seedling tray to feed, each tooth of the gear corresponds to each row of seedling holes on the seedling tray, accurate stepping seedling conveying can be realized, and the problems that in the prior chain and iron wire feeding seedling conveying mode, the seedling conveying precision is not high, the stability is poor, an iron wire is easy to bend and damage and the like are solved.
2. The invention innovatively designs the seedling tray turning poking disc at the turning position of the seedling tray, can solve the problem that the gear and the seedling tray can not be accurately meshed and meshed to interfere when turning, realizes that the power in the seedling feeding and seedling tray returning processes is not interrupted, and can accurately realize the seedling tray returning.
3. The seedling tray conveying gear mechanism adopts the combination of the gear, the ratchet wheel and the pawl, so that the seedling tray can be manually pushed to be connected with the previous seedling tray if the phenomenon of seedling tray missing occurs, and the problem that the seedlings in two trays have gaps due to seedling tray missing, and then the seedlings do not exist in a certain distance in a field in the planting process is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3a is a schematic view of a seedling tray conveying gear mechanism of the present invention;
FIG. 3b is a schematic view of the octant gear installation of the present invention;
FIG. 4 is a drawing of a seedling tray turning toggle tray of the present invention;
FIG. 5 is a schematic view of the contact position of the seedling turning driving plate of the present invention with the seedling plate;
FIG. 6 is a schematic cross-sectional view of the seedling box for simultaneously conveying seedling-feeding trays and recovering trays according to the present invention;
FIGS. 7a, 7b, 7c and 7d are schematic views of four positions of movement of an eight-tooth gear of the present invention and between a seedling tray conveying ratchet and a seedling tray conveying pawl, respectively, during the process of pushing the seedling tray to advance by one rotation under the action of an external force;
FIGS. 8a, 8b, 8c and 8d are schematic views of four movement positions of a seedling tray conveying ratchet wheel in rotation and the positional relationship between the octave gear and the seedling tray conveying pawl, respectively;
in the figure: 1. sprocket B, 2, bidirectional screw shaft, 3, seedling tray turning and poking disc, 4, chain, 5, driving seedling feeding shaft B, 6, sprocket A, 7, box moving guide rail support frame, 8, seedling tray conveying gear mechanism, 9, pressure plate, 10, seedling box body, 11, plastic seedling tray guide platform, 12, pressure plate support frame, 13, pressure plate iron wire, 14, pressure plate support platform, 15, guide rail, 16, driving seedling feeding shaft A, 17, longitudinal ratchet poking mechanism, 18, seedling box base, 19, seedling box support rod, 20, eight-tooth gear, 21, seedling tray conveying ratchet, 22, seedling tray conveying pawl, 23, gear inner bearing, 24, driven seedling feeding shaft A, 25, driven seedling feeding shaft B, 26, seedling box support wheel, 27, poking shaft, 28, shifting fork, 29, sliding block, 30, swinging rod, 31, connecting rod, 32, unlocking part, 33, driving pawl, 34 and driven swinging rod, 35. the driving ratchet wheel 36, the stopping ratchet wheel 37, the stopping pawl 38, the positioning rod 39 and the driving swing rod.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, 2, 3a, 3b and 6, the seedling box of the rice pot seedling transplanter comprises a seedling box body 10, a driving seedling tray conveying mechanism, a driven seedling tray conveying mechanism, a seedling box base 18, a seedling tray conveying gear mechanism 8, a transverse box moving mechanism, a box moving guide rail support frame 7, a longitudinal ratchet wheel toggle mechanism 17, a pressure plate assembly, a seedling box support rod 19 and a seedling box support wheel 26; the guide rail 15 is fixed on the top of the seedling box base 18, the upper end of the box-moving guide rail support frame 7 is fixed on the seedling box body 10, and the lower end of the box-moving guide rail support frame 7 and the guide rail 15 form a sliding pair. The seedling box supporting rod 19 is fixed on the seedling box base 18; the seedling box supporting wheel 26 is fixed at the lower end of the seedling box body 10 and forms a sliding pair with the seedling box supporting rod 19.
The driving seedling tray conveying mechanism comprises a driving seedling feeding shaft A16, a driving seedling feeding shaft B5, a seedling tray turning poking disc 3, a seedling tray conveying gear mechanism 8, a chain wheel A6, a chain wheel B1 and a chain 4. Seven seedling turning dial plates 3 are fixed on the driving seedling feeding shaft A16 at equal intervals, and the driving seedling feeding shaft A16 is supported at the lower end of the seedling box body 10 through a bearing; the chain wheel B1 is fixed at the right end of the driving seedling feeding shaft A16, the driving seedling feeding shaft B5 is supported on the seedling box body 10 through a bearing, two seedling tray conveying gear mechanisms 8 with the distance of H are arranged on the driving seedling feeding shaft B5, the H is one third of the length of the driving seedling feeding shaft B5, the chain wheels A6 are fixed at both ends of the driving seedling feeding shaft B5, and the chain wheel B1 at the right end of the driving seedling feeding shaft A16 is connected with the chain wheel A6 at the right end of the driving seedling feeding shaft B5 through a chain 4.
The driven seedling tray conveying mechanism comprises a driven seedling conveying shaft A24, a driven seedling conveying shaft B25, a seedling tray conveying gear mechanism 8, a chain wheel A6 and a chain 4. The driven seedling feeding shaft A24 and the driven seedling feeding shaft B25 are supported on the seedling box body 10 through bearings, and the driving seedling feeding shaft A16, the driving seedling feeding shaft B5, the driven seedling feeding shaft A24 and the driven seedling feeding shaft B25 are sequentially arranged from the lower end to the upper end of the seedling box body 10; two seedling tray conveying gear mechanisms 8 with the distance of H are arranged on the driven seedling feeding shaft A24 and the driven seedling feeding shaft B25, chain wheels A6 are fixed at both ends of the driven seedling feeding shaft A24, a chain wheel A6 is fixed at the right end of the driven seedling feeding shaft B25, a chain wheel A6 at the left end of the driven seedling feeding shaft A24 is connected with a chain wheel A6 at the left end of the driving seedling feeding shaft B5 through a chain 4, and a chain wheel A6 at the right end of the driven seedling feeding shaft A24 is connected with a chain wheel A6 at the right end of the driven seedling feeding shaft B25 through a chain 4.
The seedling tray conveying gear mechanism 8 comprises an eight-tooth gear 20, a seedling tray conveying ratchet wheel 21, a seedling tray conveying pawl 22 and a gear inner bearing 23. The eight-tooth gear 20 is hinged with the tail part of a seedling tray conveying pawl 22 and is connected with the head part of the seedling tray conveying pawl 22 through a spring, and the head part of the seedling tray conveying pawl 22 is embedded into one tooth of a seedling tray conveying ratchet wheel 21. Eight-tooth gears 20 of two seedling tray conveying gear mechanisms 8 are respectively supported on the driving seedling feeding shaft B5, the driven seedling feeding shaft A24 and the driven seedling feeding shaft B25 through gear inner bearings 23, and the driving seedling feeding shaft B5, the driven seedling feeding shaft A24 and the driven seedling feeding shaft B25 are respectively fixed with seedling tray conveying ratchet wheels 21 of the two seedling tray conveying gear mechanisms 8; the rotation directions of all the seedling tray conveying ratchet wheels 21 are consistent and are opposite to the rotation direction of the bidirectional screw shaft 2.
The transverse box moving mechanism comprises a slide block 29, a bearing seat, a bidirectional screw shaft 2 and a swinging rod 30; the bidirectional spiral shaft 2 is provided with two spiral wire grooves with opposite rotation directions; two ends of the two spiral wire grooves are respectively communicated; the bidirectional screw shaft 2 is supported on a bearing seat through a bearing, and the bearing seat is fixed on a seedling box base 18; the sliding block 29 is fixed with the box moving guide rail supporting frame 7 and forms a screw pair with the bidirectional screw shaft 2; the oscillating rod 30 is fixed at one end of the bidirectional screw shaft 2, and the driving gear is fixed at the other end of the bidirectional screw shaft 2. Power is input from the drive gear.
The longitudinal ratchet wheel toggle mechanism 17 comprises a toggle shaft 27, a shift fork 28, a connecting rod 31, a driving pawl 33, a driven swing rod 34, a driving ratchet wheel 35, a stopping ratchet wheel 36, a stopping pawl 37, a positioning rod 38 and a driving swing rod 39; the shifting shaft 27 and the seedling box body form a revolute pair, and two shifting forks 28 are fixed at two ends of the shifting shaft 27; one end of the driving swing rod 39 is fixed on the shifting shaft 27, and the other end is hinged with one end of the connecting rod 31; a hinged shaft A is fixed at the other end of the connecting rod, the hinged shaft A and one end of the driven swing rod 34 form a revolute pair, and the tail end of the driving pawl 33 is sleeved on the hinged shaft A and is connected with the hinged shaft A through a torsional spring A; the other end of the driven swing rod and the left end of the driving seedling feeding shaft A16 form a rotating pair; the stopping ratchet wheel 36 and the driving ratchet wheel 35 are both fixed at the left end of the active seedling feeding shaft A; the rotation direction of the stop ratchet wheel 36 is opposite to the rotation direction of the bidirectional screw shaft 2, and the rotation direction of the drive ratchet wheel 35 is the same as the rotation direction of the bidirectional screw shaft 2; the head end of the driving pawl 33 is embedded in one tooth of the driving ratchet wheel 35; two ends of the positioning rod 38 are respectively sleeved on the shifting shaft 27 and the driving seedling feeding shaft A16 in a hollow manner, and the positioning rod 38 is connected with the shifting shaft 27 through a torsion spring B; a hinge shaft B is fixed in the middle of the positioning rod 38; the tail part of the stopping pawl 37 and the hinged shaft B form a revolute pair and are connected with the hinged shaft B through a torsional spring C; one of the claws of the head of the stopping pawl 37 is fitted into one of the teeth of the stopping ratchet 36; the unlocking element 32 has one end fixed to the middle of the link and the other end in contact with the other jaw of the head of the stopping pawl 37 adjacent to the side of the stopping ratchet 36.
The platen assembly includes platen plate 9, platen wire 13 and platen plate support frame 12. The two pressure plate support frames 12 are arranged at intervals, and the two ends of the pressure plate support frames 12 are fixed on the two sides of the seedling box body 10 through screws; two platen plates 9 are arranged on each platen plate support frame 12 at fixed intervals. The lower ends of every two pressure plate plates 9 aligned in position on different pressure plate support frames 12 are fixed through a pressure plate iron wire 13. A plastic seedling tray guide platform 11 is fixed on top of the platen support platform 14. The pressure plate supporting platform 14 is fixed on the seedling box body 10 and is arranged at a distance from the bottom surface of the inner wall of the seedling box body 10; six notches A arranged in an array are formed in the pressure plate supporting platform 14, eight-tooth gears 20 of the six seedling plate conveying gear mechanisms 8 are respectively arranged in the corresponding notches A, and the eight-tooth gears protrude out of the top surface of the pressure plate supporting platform. Seven notches B arranged at equal intervals are further formed in the pressure plate supporting platform 14, the seven seedling turning poking discs 3 are respectively arranged in the corresponding notches B, and the height of the seedling turning poking discs protruding out of the top surface of the pressure plate supporting platform is larger than the height of the eight-tooth gears protruding out of the top surface of the pressure plate supporting platform.
As shown in fig. 4, thirteen right-angled triangular convex strip groups which are integrally formed and are uniformly distributed along the circumferential direction are arranged on both end surfaces of the seedling tray turning poking disc 3; the right-angled triangle convex strip group comprises a right-angled triangle convex strip A and a right-angled triangle convex strip B, the right-angled triangle convex strip A and the right-angled triangle convex strip B are arranged along the radial direction, the right-angled triangle convex strip A inclines inwards, and the right-angled triangle convex strip B inclines outwards; the hypotenuse of the right triangle convex strip A is crossed with that of the right triangle convex strip B, and the hypotenuse of the right triangle convex strip B is more than three times that of the right triangle convex strip A; the outermost points of the right-angled triangle convex strip A and the right-angled triangle convex strip B are positioned in the same plane.
As shown in FIG. 5, which is a schematic view of the movement of the seedling turning dial 3 and the contact of the seedling with the seedling in the present invention, two curves with a spacing a are the theoretical action profile of the seedling turning dial 3, but the actual part has thickness, so the profile line is shifted inwards to reach the spacing b of the two curves. The invention mainly depends on seven same seedling tray turning poking disks 3 to drive the turning of the whole seedling tray, and solves the problem that the distance between two teeth is enlarged when the rack type belt is used for driving the seedling tray to turn, so that the seedling tray can not turn corresponding to the teeth on the belt one by one.
The working method of the seedling box of the rice pot seedling transplanter comprises the following specific steps:
power is input by the driving gear to drive the bidirectional screw shaft in the transverse box moving mechanism to rotate, so that the sliding block is driven to move left and right, and the whole seedling box body 10 moves left and right as the sliding block is fixed with the box moving guide rail supporting frame 7 and the upper end of the box moving guide rail supporting frame 7 is fixed with the seedling box body 10. When the seedling box body 10 moves to the leftmost end or the rightmost end, the swing rod of the transverse box moving mechanism strikes a shifting fork fixed on the shifting shaft 27, so that the shifting shaft rotates. The poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism 17 to rotate, so that the driving seedling feeding shaft A16 rotates to drive the seedling disc turning poking disc 3 on the driving seedling feeding shaft to rotate, and the seedling disc turning poking disc 3 generates poking power to the bottom of the seedling disc to advance the seedling disc, thereby achieving the purpose of feeding and changing seedlings. The driving seedling feeding shaft A16 rotates to drive a chain wheel B1 on the driving seedling feeding shaft A16 to rotate, the chain wheel B1 drives a chain wheel A6 at the right end of the driving seedling feeding shaft B5 to rotate through a chain 4, then a chain wheel A6 at the left end of the driving seedling feeding shaft B5 drives a chain wheel A6 at the left end of the driven seedling feeding shaft A24 to rotate through the chain 4, and a chain wheel A6 at the right end of the driven seedling feeding shaft A24 drives a chain wheel A6 at the right end of the driven seedling feeding shaft B25 to rotate through the chain 4; the rotation of the driving seedling feeding shaft B5, the driven seedling feeding shaft A24 and the driven seedling feeding shaft B25 drives the seedling tray conveying ratchet wheels 21 on the respective shafts to rotate, the eight-tooth gear 20 rotates by one tooth through the acting force of the seedling tray conveying ratchet wheels 21 and the seedling tray conveying pawls 22, the eight-tooth gear 20 achieves the purpose of conveying the seedling trays forward by one line through the meshing motion with the seedling trays, the four motion positions of the position relation among the one eight-tooth gear, the seedling tray conveying ratchet wheels and the seedling tray conveying pawls in the whole motion process are shown in figures 8a, 8B, 8c and 8d, arrows show the rotation direction of the seedling tray conveying ratchet wheels, and the upper seedling tray and the lower seedling tray are respectively a seedling conveying tray on the upper side and a seedling tray on the lower side. When the seedling box body 10 moves from the leftmost end or the rightmost end to the middle, the shifting fork 28 loses the force given by the swinging rod 30, the shifting shaft rotates and resets, but the longitudinal ratchet wheel shifting mechanism 17 does not drive the active seedling feeding shaft A16 to rotate at the moment. When a space is formed between two seedling trays on the pressure plate supporting platform 14 (for example, the distance is caused by forgetting to place the seedling trays), the next seedling tray is pushed forwards by external force, the next seedling tray and the eight-tooth gear 20 move to drive the eight-tooth gear to rotate, the seedling tray conveying pawl 22 on the eight-tooth gear rotates along the seedling tray conveying ratchet wheel 21, so that the seedling tray conveying ratchet wheel 21 cannot be acted, the eight-tooth gear and the next seedling tray smoothly move forwards until the next seedling tray moves to be in contact with the previous seedling tray, and the space between the two seedling trays is eliminated. Four movement positions of a eight-tooth gear and the seedling tray conveying ratchet wheel and the seedling tray conveying pawl in the process of pushing the seedling tray to advance by one grid under the action of external force are shown in figures 7a, 7b, 7c and 7 d.
Wherein, the process that the poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism 17 to operate is as follows: the poking shaft 27 rotates to lead the driving swing rod 39 to swing, and a four-bar mechanism consisting of the driving swing rod 39, the connecting rod 31, the driven swing rod 34 and a rack formed by connecting the central lines of the poking shaft and the driving seedling feeding shaft A16 starts to move. The driving swing rod 39 drives the unlocking part 32 fixed on the connecting rod 31 to move backwards together, the unlocking part 32 enables the stopping pawl 37 to rotate away from the stopping ratchet wheel 36 to achieve the purpose of unlocking, the driven swing rod 34 swings to enable the driving pawl 33 to push the driving ratchet wheel 35 fixed on the driving seedling feeding shaft A16 to rotate, and the driving seedling feeding shaft A16 rotates together to achieve the purpose of feeding seedlings. When the shifting shaft rotates to reset, the four-bar mechanism resets, the driving pawl 33 is embedded into the next tooth of the driving ratchet wheel 35, and the stopping pawl 37 blocks the next tooth of the stopping ratchet wheel 36 to achieve the purpose of stopping.
Claims (5)
1. The seedling box of the rice pot seedling transplanter comprises a seedling box body, a seedling box base, a transverse box moving mechanism, a box moving guide rail support frame, a longitudinal ratchet wheel stirring mechanism, a pressure plate assembly, a seedling box supporting rod and a seedling box supporting wheel; the guide rail is fixed on the top of the seedling box base, the upper end of the box-moving guide rail support frame is fixed on the seedling box body, and the lower end of the box-moving guide rail support frame and the guide rail form a sliding pair; the seedling box supporting rod is fixed on the seedling box base; the seedling box supporting wheel is fixed at the lower end of the seedling box body and forms a sliding pair with the seedling box supporting rod; the seedling box supporting rod is arranged at the front part of the seedling box base, and the guide rail is arranged at the rear part of the seedling box base; the method is characterized in that: the seedling tray conveying device also comprises a driving seedling tray conveying mechanism, a driven seedling tray conveying mechanism and a seedling tray conveying gear mechanism;
the driving seedling tray conveying mechanism comprises a driving seedling feeding shaft A, a driving seedling feeding shaft B, a seedling tray turning and poking disc, a seedling tray conveying gear mechanism, a chain wheel A, a chain wheel B and a chain; n seedling disc turning and poking discs are fixed on the driving seedling feeding shaft A at equal intervals, and n is more than or equal to 5; the active seedling feeding shaft A is supported at the lower end of the seedling box body through a bearing; the chain wheel B is fixed at the right end of the driving seedling feeding shaft A, the driving seedling feeding shaft B is supported on a seedling box body through a bearing, two seedling tray conveying gear mechanisms with the distance of H are arranged on the driving seedling feeding shaft B, the chain wheels A are fixed at two ends of the driving seedling feeding shaft B, and the chain wheel B at the right end of the driving seedling feeding shaft A is connected with the chain wheel A at the right end of the driving seedling feeding shaft B through a chain;
the driven seedling tray conveying mechanism comprises a driven seedling conveying shaft A, a driven seedling conveying shaft B, a seedling tray conveying gear mechanism, a chain wheel A and a chain; the driven seedling feeding shaft A and the driven seedling feeding shaft B are supported on a seedling box body through bearings, and the driving seedling feeding shaft A, the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B are sequentially arranged from the lower end to the upper end of the seedling box body; two seedling tray conveying gear mechanisms with the distance H are arranged on the driven seedling conveying shaft A and the driven seedling conveying shaft B, chain wheels A are fixed at two ends of the driven seedling conveying shaft A, a chain wheel A is fixed at the right end of the driven seedling conveying shaft B, the chain wheel A at the left end of the driven seedling conveying shaft A is connected with the chain wheel A at the left end of the driving seedling conveying shaft B through a chain, and the chain wheel A at the right end of the driven seedling conveying shaft A is connected with the chain wheel A at the right end of the driven seedling conveying shaft B through a chain;
the seedling tray conveying gear mechanism comprises an eight-tooth gear, a seedling tray conveying ratchet wheel, a seedling tray conveying pawl and a gear inner bearing; the eight-tooth gear is hinged with the tail part of the seedling tray conveying pawl and is connected with the head part of the seedling tray conveying pawl through a spring, and the head part of the seedling tray conveying pawl is embedded into one tooth of the seedling tray conveying ratchet wheel; eight-tooth gears of the two seedling tray conveying gear mechanisms are respectively supported on the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B through gear inner bearings, and the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B are respectively fixed with seedling tray conveying ratchet wheels of the two seedling tray conveying gear mechanisms; the rotation directions of all the seedling tray conveying ratchet wheels are consistent and are opposite to the rotation directions of the bidirectional screw shafts of the transverse box moving mechanism;
the transverse box moving mechanism comprises a sliding block, a bearing seat, a bidirectional screw shaft and a swinging rod; the bidirectional screw shaft is supported on a bearing seat through a bearing, and the bearing seat is fixed on a seedling box base; the sliding block is fixed with the box moving guide rail supporting frame and forms a screw pair with the bidirectional screw shaft; the swing rod is fixed at one end of the bidirectional screw shaft, and the driving gear is fixed at the other end of the bidirectional screw shaft;
the longitudinal ratchet wheel shifting mechanism comprises a shifting shaft, a shifting fork, a connecting rod, a driving pawl, a driven oscillating bar, a driving ratchet wheel, a stopping pawl, a positioning rod and a driving oscillating bar; the shifting shaft and the seedling box body form a revolute pair, and the two shifting forks are fixed at the two ends of the shifting shaft; one end of the driving swing rod is fixed on the shifting shaft, and the other end of the driving swing rod is hinged with one end of the connecting rod; the other end of the connecting rod is fixed with a hinged shaft A, the hinged shaft A and one end of the driven swing rod form a revolute pair, and the tail end of the driving pawl is sleeved on the hinged shaft A and is connected with the hinged shaft A through a torsional spring A; the other end of the driven swing rod and the left end of the driving seedling feeding shaft A form a rotating pair; the stopping ratchet wheel and the driving ratchet wheel are both fixed at the left end of the active seedling feeding shaft A; the rotation direction of the stop ratchet wheel is opposite to the rotation direction of the bidirectional screw shaft, and the rotation direction of the drive ratchet wheel is the same as the rotation direction of the bidirectional screw shaft; the head end of the driving pawl is embedded into one tooth of the driving ratchet wheel; two ends of the positioning rod are respectively sleeved on the shifting shaft and the driving seedling feeding shaft A in a hollow manner, and the positioning rod is connected with the shifting shaft through a torsion spring B; the middle part of the positioning rod is fixed with a hinged shaft B; the tail part of the stopping pawl and the articulated shaft B form a revolute pair and are connected with the articulated shaft B through a torsional spring C; one claw of the head of the stopping pawl is embedded into one tooth of the stopping ratchet wheel; one end of the unlocking part is fixed in the middle of the connecting rod, and the other end of the unlocking part is contacted with the side surface of the other claw at the head of the stopping pawl, which is close to the stopping ratchet wheel;
the pressure plate assembly comprises a pressure plate, a pressure plate iron wire and a pressure plate support frame; the two pressure plate support frames are arranged at intervals, and two ends of each pressure plate support frame are fixed on two sides of the seedling box body through screws; two pressure plate plates are fixedly arranged on each pressure plate support frame at intervals; the lower ends of every two pressure plate plates aligned on the different pressure plate support frames are fixed by a pressure plate iron wire; the plastic seedling tray guiding platform is fixed at the top end of the pressure plate supporting platform; the pressure plate supporting platform is fixed on the seedling box body and is arranged at a distance from the bottom surface of the inner wall of the seedling box body; the pressure plate supporting platform is provided with six notches A which are arranged in an array manner, eight-tooth gears of the six seedling plate conveying gear mechanisms are respectively arranged in the corresponding notches A, and the eight-tooth gears protrude out of the top surface of the pressure plate supporting platform; the pressure plate supporting platform is also provided with n notches B which are arranged at equal intervals, n seedling plate turning poking plates are respectively arranged in the corresponding notches B, and the height of the seedling plate turning poking plates protruding out of the top surface of the pressure plate supporting platform is greater than the height of the eight-tooth gears protruding out of the top surface of the pressure plate supporting platform;
the two end faces of the seedling tray turning poking disc are respectively provided with a plurality of right-angled triangular convex strip groups which are integrally formed and are uniformly distributed along the circumferential direction; the right-angled triangle convex strip group comprises a right-angled triangle convex strip A and a right-angled triangle convex strip B, the right-angled triangle convex strip A and the right-angled triangle convex strip B are arranged along the radial direction, the right-angled triangle convex strip A inclines inwards, and the right-angled triangle convex strip B inclines outwards; the hypotenuse of the right triangle convex strip A is crossed with that of the right triangle convex strip B, and the hypotenuse of the right triangle convex strip B is more than three times that of the right triangle convex strip A; the outermost points of the right-angled triangle convex strip A and the right-angled triangle convex strip B are positioned in the same plane.
2. The seedling box of the rice pot seedling transplanter as claimed in claim 1, characterized in that: the value of H is one third of the length of the active seedling feeding shaft B.
3. The working method of the seedling box of the rice pot seedling transplanter according to claim 1 or 2, characterized in that: the method comprises the following specific steps:
the seedling tray is put in by the plastic seedling tray guide platform and is pressed by the pressure plate iron wire; then manually pushing the seedling tray to press the bottom of the seedling tray on the seedling tray turning poking disc; the power is input by the driving gear to drive the bidirectional screw shaft to rotate, thereby driving the slide block and the seedling box body to move left and right; when the seedling box body moves to the leftmost end or the rightmost end, the swinging rod strikes a shifting fork fixed on the shifting shaft to enable the shifting shaft to rotate; the poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism to operate, so that the driving seedling feeding shaft A rotates to drive the seedling tray turning poking disc on the driving seedling feeding shaft to rotate, and the seedling tray turning poking disc generates poking force to the bottom of the seedling tray to advance the seedling tray, thereby achieving the purpose of feeding and changing the rows; the driving seedling conveying shaft A rotates to drive a chain wheel B on the driving seedling conveying shaft A to rotate, the chain wheel B drives a chain wheel A at the right end of the driving seedling conveying shaft B to rotate through a chain, the chain wheel A at the left end of the driving seedling conveying shaft B drives a chain wheel A at the left end of the driven seedling conveying shaft A to rotate through the chain, and the chain wheel A at the right end of the driven seedling conveying shaft A drives a chain wheel A at the right end of the driven seedling conveying shaft B to rotate through the chain; the rotation of the driving seedling feeding shaft B, the driven seedling feeding shaft A and the driven seedling feeding shaft B drives the seedling tray conveying ratchet wheels on the respective shafts to rotate, the octadentate gear rotates by one tooth through the acting force of the seedling tray conveying ratchet wheel and the seedling tray conveying pawl, and the octadentate gear moves by meshing with the seedling tray to achieve the aim of accurately advancing the seedling tray by one line and feeding the seedling; when the seedling box body moves from the leftmost end or the rightmost end to the middle, the shifting fork loses the force given by the swinging rod, the shifting shaft rotates and resets, but the longitudinal ratchet shifting mechanism does not drive the active seedling feeding shaft A to rotate at the moment.
4. The working method of the seedling box of the rice pot seedling transplanter according to claim 3, characterized in that: when a space is formed between two seedling trays on the pressure plate supporting platform, the next seedling tray is pushed forwards by external force, the next seedling tray and the eight-tooth gear move to drive the eight-tooth gear to rotate, and the seedling tray conveying pawl on the eight-tooth gear rotates along the seedling tray conveying ratchet wheel, so that the seedling tray conveying ratchet wheel cannot be acted, the eight-tooth gear and the next seedling tray smoothly move forwards until the next seedling tray moves to be contacted with the previous seedling tray, and the gap between the two seedling trays is eliminated.
5. The working method of the seedling box of the rice pot seedling transplanter according to claim 3, characterized in that: the process that the poking shaft rotates to drive the longitudinal ratchet wheel poking mechanism to operate is as follows: the poking shaft rotates to enable the driving swing rod to swing, the driving swing rod drives the unlocking part fixed on the connecting rod to move backwards together, the unlocking part enables the stopping pawl to rotate away from the stopping ratchet wheel to achieve the purpose of unlocking, the driven swing rod swings to enable the driving pawl to push the driving ratchet wheel fixed on the driving seedling feeding shaft A to rotate, and the driving seedling feeding shaft A rotates to achieve the purpose of feeding seedlings; when the shifting shaft rotates and resets, the driving swing rod, the connecting rod, the unlocking part, the stopping pawl, the driven swing rod and the driving pawl all reset, the driving pawl is embedded into the next tooth of the driving ratchet wheel, and the stopping pawl blocks the next tooth of the stopping ratchet wheel to achieve the purpose of stopping.
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