CN106717366B - Coaxial double-rod ejection type wide-narrow row seedling throwing mechanism of cylindrical and elliptic bevel gear planetary system - Google Patents
Coaxial double-rod ejection type wide-narrow row seedling throwing mechanism of cylindrical and elliptic bevel gear planetary system Download PDFInfo
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- CN106717366B CN106717366B CN201611074840.8A CN201611074840A CN106717366B CN 106717366 B CN106717366 B CN 106717366B CN 201611074840 A CN201611074840 A CN 201611074840A CN 106717366 B CN106717366 B CN 106717366B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The invention discloses a coaxial double-rod ejection type cylindrical gear-elliptical bevel gear planetary system wide-narrow row seedling throwing mechanism, which comprises a gear box, wherein a central cylindrical gear, an upper middle cylindrical gear, a lower middle elliptical bevel gear, an upper middle elliptical bevel gear and a lower planetary elliptical bevel gear are supported in the gear box; the upper transplanting arm and the lower transplanting arm are coaxially connected with the upper planetary elliptic bevel gear and the lower planetary elliptic bevel gear; a hollow sleeve rod is arranged in the planting arm shell in a sliding manner, and a solid push rod is arranged in the hollow sleeve rod in a sliding manner; the planting arm shell is internally hinged with a double-contour cam, a shifting fork and a trigger, and the outer end part of the hollow sleeve rod is provided with a seedling taking mechanism; the invention adopts cylindrical gear-elliptic bevel gear transmission as a transmission mechanism, and is matched with a coaxial double-rod ejection type planting arm, thereby being capable of effectively meeting the agronomic requirements of different wide and narrow row seedling throwing and filling the technical blank of seedling throwing machines.
Description
Technical Field
The invention relates to agricultural machinery, in particular to a coaxial double-rod ejection type wide and narrow row seedling throwing mechanism for a cylindrical and elliptical bevel gear planetary system.
Background
At present, three main modes exist for mechanical rice planting: direct seeding, transplanting and throwing seedling. Wherein, the direct seeding is a disordered planting mode and has long growing period, the seedling transplanting has a seedling recovering period of 5-7 days, and both methods can prolong the growing period; however, the seedling throwing has no seedling reviving period, and the seedling throwing can improve 10-15% of yield for common seedlings. In addition, the seedling throwing has the advantages of high transplanting speed and no root injury, and is recommended by rice planting specialists as the planting agriculture with the highest yield increasing rate. However, the unordered seedling throwing operation is not beneficial to the later field management, influences the ventilation of rice, uniformly absorbs sunlight and soil nutrients, is easy to cause diseases and insect pests, and is not suitable for the national conditions of small field planting in China, thereby influencing the popularization of the seedling throwing machine. The development of an orderly seedling throwing mechanism is therefore a key to solving the above problems.
At the beginning of the 80 s, japan has produced ordered seedling-throwing machines and entered the market; due to the reasons of complex structure, high processing precision requirement, high cost, low working efficiency and the like, the method can not be popularized in a large area, and only accounts for less than 0.5% of the rice planting area.
In addition, the wide-narrow row seedling throwing refers to a wide-narrow planting mode of a rice seedling throwing machine, the planting mode utilizes the yield increasing principle of marginal advantages of crops, ventilation and transmittance among plants are improved, diseases are relieved, leaf area indexes are increased, the service life of leaves is prolonged, dry matter accumulation is accelerated, and therefore the purposes of high quality, high yield, cost saving and efficiency improvement are achieved.
Disclosure of Invention
The invention aims to provide a coaxial double-rod ejection type wide-narrow row seedling throwing mechanism for a cylindrical and elliptic bevel gear planetary system according to the defects of the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme: a coaxial double-rod ejection type cylindrical gear-elliptical bevel gear planetary system wide and narrow row seedling throwing mechanism comprises a gear box, wherein a central cylindrical gear, an upper middle elliptical bevel gear, an upper planetary elliptical bevel gear, a lower middle cylindrical gear, a lower middle elliptical bevel gear and a lower planetary elliptical bevel gear are supported in the gear box; the upper middle cylindrical gear is coaxially and fixedly connected with the upper middle elliptical bevel gear, the lower middle cylindrical gear is coaxially and fixedly connected with the lower middle elliptical bevel gear, the central cylindrical gear is respectively meshed with the upper middle cylindrical gear and the lower middle cylindrical gear, the upper middle elliptical bevel gear is meshed with the upper planetary elliptical bevel gear, and the lower middle elliptical bevel gear is meshed with the lower planetary elliptical bevel gear;
the transplanting machine also comprises an upper transplanting arm and a lower transplanting arm; the upper transplanting arm is coaxially connected with the upper planetary elliptic bevel gear, and the lower transplanting arm is coaxially connected with the lower planetary elliptic bevel gear; the upper transplanting arm and the lower transplanting arm are identical in structure and both comprise: the planting arm comprises a planting arm shell, wherein a hollow sleeve rod is arranged in the planting arm shell in a sliding manner, a solid push rod is arranged in the hollow sleeve rod in a sliding manner, a sleeve rod spring is arranged between the tail end of the hollow sleeve rod and the planting arm shell, and a push rod energy-collecting spring is arranged between the solid push rod and the planting arm shell; the hollow loop bar is provided with a first limiting plate, a second limiting plate and an opening and closing mechanism; the solid push rod is provided with a buckling groove, and the opening and closing mechanism is connected with the buckling groove in an opening and closing manner; the planting arm shell is internally hinged with a double-profile cam, a shifting fork and a trigger, the shifting fork and the trigger are coaxial, one end of the shifting fork is arranged between a first limiting plate and a second limiting plate, the other end of the shifting fork and one end of the trigger are both abutted with the double-profile cam, the other end of the trigger is matched and driven with an opening and closing mechanism, and a trigger pulling spring is arranged between the other end of the trigger and the planting arm shell; the outer end part of the hollow sleeve rod is provided with a seedling taking mechanism;
the planting arm shell is fixedly connected with the lower middle elliptical bevel gear in a coaxial manner, and the double-profile cam is fixedly connected with the gear box.
Further, the axes of the upper middle cylindrical gear and the lower middle cylindrical gear are parallel to the axis of the central cylindrical gear, and the intersection angle of the axes of the upper planetary elliptic bevel gear and the lower planetary elliptic bevel gear and the axes of the upper middle cylindrical gear and the lower middle cylindrical gear is not equal to 90 degrees
And (5) corners.
Further, the relative positions of the central cylindrical gear, the upper middle cylindrical gear, the lower middle cylindrical gear and the triaxial axis of the triaxial gear planetary system of the upper planetary elliptic bevel gear and the lower elliptic bevel gear are arranged in a straight line.
Further, the central cylindrical gear, the upper middle cylindrical gear and the lower middle cylindrical gear are all right circular spur gears; the upper middle cylindrical gear and the lower middle cylindrical gear are right circular straight gears with identical geometric parameters; the upper middle elliptical bevel gear and the lower middle elliptical bevel gear are elliptical bevel gears with identical geometric parameters, and the upper planetary elliptical bevel gear and the lower planetary elliptical bevel gear are elliptical bevel gears with identical geometric parameters.
Further, the opening and closing mechanism comprises a Z-shaped buckle and a Z-shaped buckle compression spring, the Z-shaped buckle is hinged to the hollow loop bar, the Z-shaped buckle compression spring is arranged between one end of the Z-shaped buckle and the hollow loop bar, and the other end of the Z-shaped buckle is connected with the buckling groove in an opening and closing mode.
Further, the dual profile cam has a first annular groove and a second annular groove thereon.
Further, the central angle range alpha of the first annular groove is 75-85 degrees, the central angle range beta of the second annular groove is 345-350 degrees, and the first annular grooveAnd the symmetry axis of the second annular groove
100-250 degrees.
Further, one end of the shifting fork is arranged between the first limiting plate and the second limiting plate; the other end of the shifting fork is abutted with the first annular groove of the double-profile cam, one end of the trigger is abutted with the second annular groove of the double-profile cam, a trigger pulling spring is arranged between the other end of the trigger and the planting arm shell, and the other end of the trigger is matched and driven with the Z-shaped buckle.
Further, the seedling taking mechanism comprises a seedling needle, the seedling needle is hinged to the outer end of the hollow sleeve rod, and a seedling needle clamping spring is arranged between the seedling needle and the hollow sleeve rod.
Further, the outer end of the solid push rod is fixedly connected with a trapezoid guide block, and the trapezoid guide block is positioned between two seedling needles.
The invention has the beneficial effects that:
1. the central cylindrical gear and the middle cylindrical gear which are meshed with each other are arranged in the gear box fixed on the central shaft, the middle cylindrical gear and the middle elliptic bevel gear which are coaxially arranged, the middle elliptic bevel gear and the planetary elliptic bevel gear which are meshed with each other, and the axial angle between the planetary elliptic bevel gear and the middle elliptic bevel gear is an angle which is not equal to 90 degrees, so that after seedling taking, the seedling throwing point of the transplanting arm is offset leftwards or rightwards by a corresponding distance relative to the seedling taking point, the row spacing of the thrown seedling drop point is changed into wide and narrow, the agronomic requirements of wide and narrow row seedling throwing are realized, the size of the axial angle is changed, and the seedling throwing mechanism can meet the agronomic requirements of different wide and narrow rows.
2. At present, most of domestic seedling throwers adopt a manpower backpack type seedling thrower, the principle is that compressed air is utilized to blow out rice pot bodies, and gravity is utilized to land, so that the mode is the same as the traditional manpower seedling thrower, the labor cost is saved, and the problems of floating seedlings, uneven seedling distribution and the like can not be solved. The invention makes an innovative design for the planting arm of the seedling throwing mechanism, the clamping and ejection process of the pot seedling is realized in two steps, a double-cam profile mechanism and a separable seedling pushing rod device are adopted, the working sequence of the traditional seedling throwing mechanism is changed, the ejection link of the rice pot seedling is increased, the design can achieve the purposes of not damaging the seedling, improving the survival rate of the seedling, ejecting the seedling into the soil at a certain height, effectively solving the problems of floating and uneven distribution of the seedling and the like when the rice seedling throwing mechanism works, and the design aims to solve the problems of floating and uneven distribution of the seedling when the rice seedling throwing mechanism works and replaces the manual seedling throwing by machinery. The cylindrical gear-elliptic bevel gear transmission is adopted as a transmission mechanism, and the coaxial double-rod ejection type planting arm is matched, so that the agricultural requirements of different wide and narrow rows of seedling throwing can be effectively met, and the technical blank of the seedling throwing machine is filled.
Drawings
FIG. 1 is a schematic view of a seedling throwing mechanism according to an embodiment of the present invention;
FIG. 2 is a transmission gear arrangement diagram illustrating an embodiment of the present invention;
FIG. 3 is a diagram of a drive gear in an embodiment of the invention, the corners of the diagram
Representing an intersection angle between the planetary elliptical bevel gear and the intermediate elliptical bevel gear;
FIG. 4 is a cross-sectional view of a planting arm according to an embodiment of the present disclosure;
FIG. 5 is a top view of a planting arm according to an embodiment of the present disclosure;
FIG. 6 is an enlarged view of a portion of FIG. 4;
FIG. 7 is an isometric view of a dual profile cam in accordance with an embodiment of the invention;
FIG. 8 is a side view of a rotary shaft of the trigger and fork of an embodiment of the present invention;
FIG. 9 is a schematic view of the central angle of the first annular groove according to an embodiment of the present invention;
FIG. 10 is a schematic view of the central angle of the second annular groove according to an embodiment of the present invention;
FIG. 11 is a schematic diagram showing the positional relationship between a first annular groove and a second annular groove according to an embodiment of the present invention;
FIG. 12 is a schematic illustration of 5 motion events of a hollow loop bar on a dual profile cam in accordance with an embodiment of the present invention;
in the figure: 1. a gear box comprises a sleeve rod spring, a 2 push rod energy-collecting spring, a 3 hollow sleeve rod, a 4 solid push rod, a 5 shift fork, a 6.Z buckle, a 7.Z buckle compression spring, a 8 buckle trigger, a 9 buckle trigger extension spring, a 10 dual-contour line cam, a 11 planting arm shell, a 12 seedling needle, a 13 seedling needle clamping spring, a 14 trapezoid guide block, a 15 seedling needle fixing frame, a 16 first limiting plate, a 17 buckle groove, a 18 second limiting plate, a 101 first annular groove, a 102 second annular groove, a 19 central sprocket, a 20 central shaft, a 21 toothed flange, a 22 lower middle cylindrical gear, a 23 lower planetary shaft, a 24 lower planetary elliptic bevel gear, a 25 lower planting arm, a 26 lower middle elliptic bevel gear, a 27 lower middle shaft, a 28 upper middle shaft, a 29 upper middle cylindrical gear, a 30 upper middle elliptic bevel gear, a 31 upper middle elliptic bevel gear, a 32 upper planetary bevel gear, a 33 upper elliptic bevel gear, a 34 gear box, a 35 central cylindrical gear, a 36 driving chain, a 38 and a 39 chain sprocket.
Detailed Description
The novel use will now be further described with reference to the drawings and examples.
As shown in fig. 1, the invention is mounted on a transmission part of a seedling throwing machine, the transmission part comprises a chain wheel box 39, power in the chain wheel box 39 is transmitted to a central chain wheel 19 through a chain 36 by a driving chain wheel 37 mounted on a driving chain wheel shaft 38, the central chain wheel 19 is fixedly connected on a central shaft 20, and the invention with the same internal transmission structure is respectively fixed at two shaft ends of the central shaft 20;
as shown in fig. 1-2, the present invention comprises a gear case 34, a central cylindrical gear 35 in the gear case 34 is sleeved at one end of a central shaft 20, and is fixedly connected with one end of a sprocket case 39 through a jaw flange 21, the central cylindrical gear 35 is meshed with upper and lower intermediate cylindrical gears 29, 22 fixedly mounted on upper and lower intermediate shafts 28, 27, and drives upper and lower intermediate elliptical bevel gears 30, 26 coaxially mounted with the upper and lower intermediate cylindrical gears 29, 22 to rotate, the upper and lower intermediate elliptical bevel gears 30, 26 are meshed with upper and lower elliptical bevel gears 32, 24 fixedly mounted on upper and lower planetary shafts 31, 23, one end of the upper and lower planetary shafts 31, 23 extending out of the gear case 34 is fixedly provided with upper and lower planting arms 33, 25, and the absolute movement of the upper and lower planting arms 33, 25 is a resultant movement of non-uniform rotation of the upper and lower elliptical bevel gears 32, 24 relative to the gear case 34 and circular movement of the gear case 34 about the central shaft 20;
as shown in FIG. 3, the upper and lower intermediate shafts 28, 27 are parallel to the central shaft 20, and the axial intersection angles of the upper and lower planetary shafts 31, 23 and the upper and lower intermediate shafts 28, 27 are not equal to 90 degrees
The angle is adjusted and designed according to the agricultural requirements of the corresponding wide and narrow row spacing, so that after seedling pot bodies are obtained by seedling needles on the upper planting arm and the lower planting arm 33 and 25, the seedling throwing points of the seedling needles are offset to the left or right by corresponding distances relative to the seedling taking points, and the wide and narrow distribution of the thrown seedling row spacing is realized.
The central cylindrical gear 35 in the gear box 34, the upper and lower intermediate cylindrical gears 29, 22 and the upper and lower planetary elliptic bevel gears 32, 24 are arranged in a straight line at the opposite positions of the triaxial axes of the triaxial gear planetary system.
The central cylindrical gear 35 in the gear box 34, and the upper and lower intermediate cylindrical gears 29, 22 are all spur gears.
The upper and lower middle cylindrical gears 29, 22 are right circular spur gears with identical geometric parameters; the upper and lower intermediate elliptical bevel gears 30, 26 and the upper and lower planetary elliptical bevel gears 32, 24 are elliptical bevel gears having identical geometric parameters.
As shown in fig. 4-6, the upper planting arm 33 and the lower planting arm 25 have the same structure and each comprise a planting arm shell 11, a hollow sleeve rod 3 is slidably arranged in the planting arm shell 11, a solid push rod 4 is slidably arranged in the hollow sleeve rod 3, a sleeve rod spring 1 is arranged between the tail end of the hollow sleeve rod 3 and the planting arm shell 11, and a push rod energy-collecting spring 2 is arranged between the solid push rod 4 and the planting arm shell 11; the hollow loop bar 3 is provided with a first limiting plate 16, a second limiting plate 18 and an opening and closing mechanism; the solid push rod 4 is provided with a buckling groove, and the opening and closing mechanism is connected with the buckling groove 17 in an opening and closing manner; the planting arm shell 11 is internally hinged with a double-profile cam 10, a shifting fork 5 and a trigger button 8, the shifting fork 5 and the trigger button 8 are coaxial, as shown in fig. 5, one end of the shifting fork 5 is arranged between a first limiting plate 16 and a second limiting plate 18, the other end of the shifting fork 5 is abutted with the double-profile cam 10, the trigger button 8 is matched with an opening and closing mechanism for transmission, and a trigger button stretching spring 9 is arranged between the trigger button 8 and the planting arm shell 11; the outer end part of the hollow sleeve rod 3 is provided with a seedling taking mechanism.
The planting arm shell 11 of the upper planting arm 33 is fixedly connected with the upper planetary elliptic bevel gear 32 coaxially, the shaft is an upper planetary shaft 31, and the planting arm shell 11 and the upper planetary shaft 31 do not have relative displacement; the planting arm shell 11 of the lower planting arm 25 is fixedly connected with the lower planetary elliptic bevel gear 24 coaxially, the shaft is a lower planetary shaft 23, and the double-profile cam 10 is fixedly connected with the gear box 34.
As shown in fig. 6, the opening and closing mechanism comprises a Z-shaped buckle 6 and a Z-shaped buckling spring 7, the Z-shaped buckle 6 is hinged on the hollow loop bar 3, the Z-shaped buckling spring 7 is arranged between one end of the Z-shaped buckle 6 and the hollow loop bar 3, and the other end of the Z-shaped buckle 6 is buckled on the buckling groove 17.
As shown in fig. 7 and fig. 9-11, the dual-profile cam 10 has two annular grooves, namely a first annular groove 101 and a second annular groove 102, wherein the central angle range α of the first annular groove 101 is 75-85 degrees, the central angle range β of the second annular groove 102 is 345-350 degrees, and the included angle between the symmetry axes of the first annular groove 101 and the second annular groove 102 is
100-250 degrees. The dual profile cam 10 is characterized in that only one power source is required compared with a common cam, and a plurality of mutually independent works can be completed within the same rotation period without mutual interference.
In this embodiment, two shifting forks 5 are adopted, the middle of the two shifting forks 5 clamps the trigger 8, the three shifting forks are hinged on the same rotation shaft, as shown in fig. 8, one end of each shifting fork 5 is supported between a first limiting plate 16 and a second limiting plate 18, one end of each shifting fork 5 rotates around the hinging point of each shifting fork 5 under the driving of a double-profile cam 10, and as one end of each shifting fork 5 is supported between the first limiting plate 16 and the second limiting plate 18 and between the tail end of a hollow loop bar 3 and a planting arm shell 11, a loop bar spring 1 is arranged, so that one end of each shifting fork 5 always supports against the first limiting plate 16; when the hollow sleeve rod 3 moves outwards, the second limiting plate 18 limits the axial travel of the hollow sleeve rod 3; the other end of the shifting fork 5 is abutted with a first annular groove 101 of the double-profile cam 10, one end of the trigger 8 is abutted with a second annular groove 102 of the double-profile cam 10, the other end of the trigger 8 is matched and driven with the Z-shaped buckle 6 to toggle the Z-shaped buckle 6, and a trigger pulling spring 9 is arranged between the other end of the trigger 8 and the planting arm shell 11.
The coaxial double-rod ejection mechanism is one of the main mechanisms of the design, and the design that the hollow sleeve rod 3 is sleeved with the solid push rod 4 enables the double rods to always work on the same axis. In fig. 6, the Z-shaped buckle 6 is hinged on the hollow sleeve rod 3, the Z-shaped buckle 6 can only rotate around the hinged position or move axially along the axis of the hollow sleeve rod 3 along with the hollow sleeve rod 3, the solid push rod 4 is internally provided with a buckle groove 17, the double rods can move together by buckling the solid push rod 4 through the Z-shaped buckle 6 (as shown in fig. 6), and two characteristic actions of seedling taking and ejection are completed on the same axis by means of the mechanism and the double-contour cam 10.
As shown in fig. 5, the seedling taking mechanism comprises a seedling needle fixing frame 15 and seedling needles 12, the seedling needle fixing frame 15 is fixed at the outer end of the hollow sleeve rod 3, the seedling needles 12 are symmetrically hinged on the seedling needle fixing frame 15, and a seedling needle clamping spring 13 is arranged between the seedling needles 12 and the seedling needle fixing frame 15. The outer end of the solid push rod 4 is fixedly connected with a trapezoid guide block 14, and the trapezoid guide block 14 is positioned between two seedling needles 12. The seedling taking mechanism belongs to an end actuating mechanism of the planting arm, wherein a trapezoidal guide block 14 is rigidly connected with the outer end of a solid push rod 4, and cooperates with the inner guide surface of a seedling needle 12 to realize the opening and closing of the seedling needle while moving along with the axial direction of the solid push rod 4. Compared with seedling needles of the existing rice transplanter, the seedling needle clamping spring 13 is adopted to provide clamping force, so that the seedling needle is not damaged and seedlings are not easily damaged when clamping hard objects.
The working principle of the invention is as follows:
the central cylindrical gear 35 is fixedly connected with the sprocket box 39 through the jaw flange 21, so that the central cylindrical gear 35 is static and does not rotate, the central shaft 20 rotates to drive the gear box 34 fixedly connected with the central shaft 20 to rotate, the lower middle elliptical bevel gear 30 is meshed with the lower planetary elliptical bevel gear 24 through the meshing of the central cylindrical gear 35 and the lower middle cylindrical gear 29, the non-constant speed rotation is realized, and the planting arm shell 11 of the lower planting arm 25 and the lower elliptical bevel gear 24 are coaxially and fixedly connected through the double-profile cam 10 and the gear box 34, so that the double-profile cam 10 and the planting arm shell 11 have relative rotation.
The seedling taking action is realized by a seedling taking mechanism, as shown in fig. 4, the hollow loop bar 3 is rigidly connected with the whole seedling needle 12 fixing frame to realize the simultaneous movement of the hollow loop bar and the whole seedling needle 12 fixing frame;
as shown in fig. 12, the hollow loop bar 3 is controlled by a double-profile cam 10, a shifting fork 5 and a spring (comprising a Z-shaped buckling spring 7 and a trigger pulling spring 9), and the whole movement process comprises a near-break movement process, a pushing-away movement process, a return movement process, a far-break movement process and an ejection movement process, which are as follows in detail:
(1) And (3) near-rest: the seedling needle 12 is in an initial state, the absolute movement and the pulling movement of the seedling needle 12 are identical in the section, at the moment, the solid push rod 4 and the trapezoid guide block 14 are in an ejecting state, the other end of the Z-shaped buckle 6 is not buckled on the buckling groove 17, and the second limiting plate 18 abuts against the planting arm shell 11, so that the hollow sleeve rod 3 does not axially move.
(2) Pushing: the seedling taking process of the seedling needle 12 is realized, the other end of the shifting fork 5 slides into the first annular groove 101 of the double-contour cam 10, the hollow loop bar 3, the seedling needle fixing frame 15 and the seedling needle 12 extend outwards along the axial direction through the first annular groove 101 on the double-contour cam 10, at the moment, the solid push rod 4 and the trapezoid guide block 14 are still static, the seedling needle 12 moves forwards relative to the trapezoid guide block 14, the inner side of the seedling needle 12 is contacted with the trapezoid guide block 14, the seedling needle 12 clamps a pot body under the combined action of the pressure of the seedling needle clamping spring 13 and the trapezoid guide block 14, and the other end of the Z-shaped buckle 6 is buckled on the buckling groove 17.
(3) Backhaul: after the other end of the shifting fork 5 slides in the first annular groove 101 of the double-profile cam 10, the double-profile cam 10 continues to rotate, so that the other end of the shifting fork 5 starts to slide out of the first annular groove 101, and the shifting fork 5 pushes the first limiting plate 16, so that the sleeve spring 1 is compressed, in the process, the Z-shaped buckle 6 is buckled on the buckling groove 17 of the solid push rod 4 and moves along with the hollow sleeve 3 in the compression direction of the sleeve spring 1, and meanwhile, the bowl body moves along with the hollow sleeve 3.
(4) Long-distance rest: in the state of fig. 4, the pot body is clamped on the seedling needle 12, and the loop bar spring 1 and the push rod energy-gathering spring 2 are in a compressed state; the distance from the sharp point of the seedling needle 12 to the rotation center of the planet wheel of the planetary gear train of the seedling throwing mechanism is kept unchanged.
(5) Ejection: the second annular groove 102 of the double-contour cam 10 controls the movement of one end of the trigger 8, when one end of the trigger 8 slides out of the second annular groove 102, the other end of the trigger 8 toggles one end of the Z-shaped buckle 6, the Z-shaped buckle 6 utilizes the lever principle to enable the other end of the Z-shaped buckle 6 to be disconnected with the buckle groove 17, and at the moment, the compressed push rod energy-gathering spring 2 releases elastic potential energy, so that the solid push rod drives the guide block 14 to move fast, and the bowl body clamped by the seedling needle 12 is ejected fast and injected into the ground. And then the state is kept, and preparation is made for next seedling taking.
Claims (10)
1. A coaxial double-rod ejection type cylindrical gear-elliptical bevel gear planetary system wide and narrow row seedling throwing mechanism comprises a gear box, wherein a central cylindrical gear, an upper middle elliptical bevel gear, an upper planetary elliptical bevel gear, a lower middle cylindrical gear, a lower middle elliptical bevel gear and a lower planetary elliptical bevel gear are supported in the gear box; the upper middle cylindrical gear is coaxially and fixedly connected with the upper middle elliptical bevel gear, the lower middle cylindrical gear is coaxially and fixedly connected with the lower middle elliptical bevel gear, the central cylindrical gear is respectively meshed with the upper middle cylindrical gear and the lower middle cylindrical gear, the upper middle elliptical bevel gear is meshed with the upper planetary elliptical bevel gear, and the lower middle elliptical bevel gear is meshed with the lower planetary elliptical bevel gear; the transplanting machine also comprises an upper transplanting arm and a lower transplanting arm; the upper transplanting arm is coaxially connected with the upper planetary elliptic bevel gear, and the lower transplanting arm is coaxially connected with the lower planetary elliptic bevel gear;
the transplanting device is characterized in that the upper transplanting arm and the lower transplanting arm have the same structure and comprise transplanting arm shells, a hollow sleeve rod is slidably arranged in the transplanting arm shells, a solid push rod is slidably arranged in the hollow sleeve rod, a sleeve rod spring is arranged between the tail end of the hollow sleeve rod and the transplanting arm shells, and a push rod energy-gathering spring is arranged between the solid push rod and the transplanting arm shells; the hollow loop bar is provided with a first limiting plate, a second limiting plate and an opening and closing mechanism; the solid push rod is provided with a buckling groove, and the opening and closing mechanism is connected with the buckling groove in an opening and closing manner; the planting arm shell is internally hinged with a double-profile cam, a shifting fork and a trigger, the shifting fork and the trigger are coaxial, one end of the shifting fork is arranged between a first limiting plate and a second limiting plate, the other end of the shifting fork and one end of the trigger are both abutted with the double-profile cam, the other end of the trigger is matched and driven with an opening and closing mechanism, and a trigger pulling spring is arranged between the other end of the trigger and the planting arm shell; the outer end part of the hollow sleeve rod is provided with a seedling taking mechanism;
the planting arm shell is fixedly connected with the lower middle elliptical bevel gear in a coaxial manner, and the double-profile cam is fixedly connected with the gear box.
2. The coaxial double-rod ejection type cylindrical gear-elliptical bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 1, wherein the axes of the upper middle cylindrical gear and the lower middle cylindrical gear are parallel to the axis of the central cylindrical gear, and the intersection angle of the axes of the upper planetary elliptical bevel gear and the lower planetary elliptical bevel gear and the axes of the upper middle cylindrical gear and the lower middle cylindrical gear is phi which is not equal to 90 degrees.
3. The wide and narrow row seedling throwing mechanism of coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system according to claim 1, wherein the relative positions of the central cylindrical gear, the upper middle cylindrical gear, the lower middle cylindrical gear and the triaxial axes of the upper and lower elliptic bevel gear triaxial gear planetary system are arranged in a straight line.
4. The coaxial double-rod ejection type cylindrical gear-elliptical bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 1, wherein the central cylindrical gear, the upper middle cylindrical gear and the lower middle cylindrical gear are all right circular spur gears; the upper middle cylindrical gear and the lower middle cylindrical gear are right circular straight gears with identical geometric parameters; the upper middle elliptical bevel gear and the lower middle elliptical bevel gear are elliptical bevel gears with identical geometric parameters, and the upper planetary elliptical bevel gear and the lower planetary elliptical bevel gear are elliptical bevel gears with identical geometric parameters.
5. The coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 1, wherein the opening and closing mechanism comprises a Z-shaped buckle and a Z-shaped buckle compression spring, the Z-shaped buckle is hinged on the hollow sleeve rod, the Z-shaped buckle compression spring is arranged between one end of the Z-shaped buckle and the hollow sleeve rod, and the other end of the Z-shaped buckle is connected with the buckling groove in an opening and closing mode.
6. The coaxial double-bar catapulting cylindrical gear-elliptical bevel gear planetary system wide-narrow row seedling throwing mechanism of claim 5, wherein the double-profile cam is provided with a first annular groove and a second annular groove.
7. The wide-narrow row seedling throwing mechanism of the coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system according to claim 6, wherein the central angle range alpha of the first annular groove is 75-85 degrees, the central angle range beta of the second annular groove is 345-350 degrees, and the included angle phi between the symmetrical axes of the first annular groove and the second annular groove is 100-250 degrees.
8. The coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 6 or 7, wherein one end of the shifting fork is supported between the first limiting plate and the second limiting plate; the other end of the shifting fork is abutted with the first annular groove of the double-profile cam, one end of the trigger is abutted with the second annular groove of the double-profile cam, a trigger pulling spring is arranged between the other end of the trigger and the planting arm shell, and the other end of the trigger is matched and driven with the Z-shaped buckle.
9. The coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 8, wherein the seedling taking mechanism comprises seedling needles, the seedling needles are hinged to the outer ends of the hollow loop bars in a symmetrical manner, and seedling needle clamping springs are arranged between the seedling needles and the hollow loop bars.
10. The coaxial double-rod ejection type cylindrical gear-elliptic bevel gear planetary system wide-narrow row seedling throwing mechanism according to claim 9, wherein the outer end of the solid push rod is fixedly connected with a trapezoid guide block, and the trapezoid guide block is positioned between two seedling needles.
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| CN103858574B (en) * | 2014-04-03 | 2016-01-20 | 任思远 | Land for growing field crops crops pot seedling elasticity seedlings clamping device |
| CN106068832A (en) * | 2016-07-20 | 2016-11-09 | 湖南省农友机械集团有限公司 | A kind of rice seedling thrower |
| CN206314195U (en) * | 2016-11-26 | 2017-07-11 | 浙江农林大学 | A kind of coaxial double-rod ejection type roller gear elliptic cone gear planetary system type wide-and narrow-row rice seedling throwing mechanism |
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