CN104170565A - Pneumatic seeder - Google Patents
Pneumatic seeder Download PDFInfo
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- CN104170565A CN104170565A CN201410411946.7A CN201410411946A CN104170565A CN 104170565 A CN104170565 A CN 104170565A CN 201410411946 A CN201410411946 A CN 201410411946A CN 104170565 A CN104170565 A CN 104170565A
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Abstract
The invention relates to the field of agricultural machinery and in particular relates to a pneumatic seeder. The pneumatic seeder comprises a frame, a tension rack, a seed box and a seeding mechanism, wherein the tension rack is arranged at one end of the frame; the seed box is connected with the seeding mechanism; the seeding mechanism comprises a seeding power device, a hole opening power device, an outer seed guide tube, a hole opener, a hole opening lever and a linkage plate; the seeding power device is arranged on the frame and is connected with the outer seed guide tube; the upper end of the outer seed guide tube is communicated with a seed guide tube, and the lower end of the outer seed guide tube is connected with the hole opener; one end of the hole opening lever is connected with the hole opener, and the other end of the hole opening lever is connected with the linkage plate; the linkage plate is connected with the hole opening power device; and the hole opening power device is arranged on the frame. According to the invention, single seed or multiple seeds in the seed box enter the seed guide tube in advance so as to enter the outer seed guide tube, the seeds are seeded in the holes due to opening and closing of the hole opener, and seeding is further finished. According to the structure, empty holes are effectively avoided, and the yield of crops is improved.
Description
Technical field
The present invention relates to agricultural mechanical field, in particular to the pneumatic sower of one.
Background technology
Sower is the planting machinery taking crop seed as sowing object, for the sower of certain class or certain crop, often titled with crop species title, as grain drill, corn seeding drill, cotton planter, herbage seed broadcaster etc.
By type of seeding, sower can be divided into seed broadcaster, drilling machine and hill-drop planter etc.
Seed broadcaster is to make the seed spreading out sow equally distributed sower on plot.Conventional type is spinner broadcaster, is attached to agricultural transportation vehicle rear portion.
Drilling type is mainly used in the seeding operation of the small-sized seeds such as cereal, vegetables, herbage.When operation, drive seed wheel to rotate by road wheel, seed is entered grain tube from the seed of planting in case by seeding quantity on request, and in plough falls into the groove of holding successfully, then will plant subcovering compacting by earthing compacting device.The ensuing crop that emerges becomes the bar of parallel equidistant capable.
Because the seed of seed broadcaster and drilling machine use is more, therefore just there is the appearance of hill-drop planter.
Bunch planting type is by a line spacing and cave distance, by the planting machinery of seed cavitation sowing.1 or several seeds can be broadcast in every cave, and point another name single grain fine sowing or many bunch plantings, be mainly used in the intertillage crop such as corn, cotton, beet, sunflower, beans, claims again row-crop drill.Each sower monomer can complete the whole operation process such as trench digging, seeding, earthing, suppression.
But the seed of existing hill-drop planter is to broadcast at present, just likely can cause the generation in hole, if continuous hole will cause large area to occur without the phenomenon of seedling, reduce the output of crops.
Summary of the invention
The object of the present invention is to provide a kind of pneumatic sower, to solve the above problems.
A kind of pneumatic sower is provided in an embodiment of the present invention, has comprised frame, tension frame, kind case and at least one sowing mechanism;
Tension frame is arranged on one end of frame, for being connected with tractor to frame onward impulse;
Plant case and be arranged on frame top, be connected with the sowing mechanism that is positioned at frame below by grain conductor;
Sowing mechanism comprises sowing power set, opens cave power set, outer grain conductor, cave opener, opens cave lever and linkage board;
Sowing power set are fixedly installed in frame;
Sowing power set are connected with outer grain conductor, can drive outer grain conductor to move;
The upper end of outer grain conductor is connected with grain conductor, and lower end is connected with cave opener;
Open one end of cave lever and a side of cave opener is connected, the other end is connected with linkage board;
One end of linkage board connects drives cave power set;
Driving cave power set is fixedly installed in frame.
Further, outer grain conductor is to tilting away from tension frame direction;
The angle of inclination of outer grain conductor is 60 °.
Further, the both sides of each sowing mechanism are provided with fertilizing mechanism;
Fertilizing mechanism comprises fertilising power set, opens cave power set, outer fertilizer guiding tube, cave opener, opens cave lever and linkage board;
Fertilising power set are fixedly installed in frame;
Fertilising power set are connected with outer fertilizer guiding tube, can drive outer fertilizer guiding tube to move;
The upper end of outer fertilizer guiding tube is connected with the fertilizer guiding tube that is connected fertile case, and lower end is connected with cave opener;
Open one end of cave lever and a side of cave opener is connected, the other end is connected with linkage board;
One end of linkage board connects drives cave power set;
Driving cave power set is fixedly installed in frame.
Further, cave opener comprises that first opens cave sheet and second and open cave sheet;
First opens cave sheet and second opens cave sheet and is combined rear formation cone;
First opens on the sheet of cave and is provided with the first gear, can rotate with the rotation of the first gear;
Second opens on the sheet of cave and is provided with the second gear, can rotate with the rotation of the second gear;
The first gear engages with the second gear;
The first gear with open cave lever and be connected, can open under the effect of cave lever, realize first and open cave sheet and the second opening and closing of opening between the sheet of cave.
Further, pneumatic sower also comprises main land wheel;
Main land wheel is arranged on frame one end near tension frame by land wheel support arm.
Further, pneumatic sower also comprises Triggering Control System;
Triggering Control System comprises data processor, approach switch and time-delay relay;
Data processor, approach switch and time-delay relay are all arranged in frame,
Approach switch is used for monitoring main land wheel operating range, and transfers data to data processor;
Data processor receives after the data of approach switch, when judging that it reaches after predetermined stroke, drives sowing mechanism to sow, and is transferred to time-delay relay time delayed signal;
Time-delay relay with drive cave power set and be connected, for receiving after the signal of data processor, time-delay closing is driven cave power set.
Further, pneumatic sower also comprises earthing wheel and adjusts spring;
Earthing wheel is taken turns support arm by earthing and is arranged on frame one end away from tension frame;
One end of adjusting spring is connected with frame, and the other end is connected with earthing wheel support arm, for regulating the height of earthing wheel.
Further, the power set of sowing mechanism are hydraulic cylinder.
Further, the power set of sowing mechanism are cylinder;
In frame, be also provided with air compressor and air accumulator, the atmosphere storage that contains certain pressure producing when by the power take-off output rotatory force of tractor is at air accumulator, for cylinder provides power.
Further, plant between case and sowing mechanism and be provided with seed adjustment case, for the seed in kind of case is toggled it in sowing mechanism.
Pneumatic sower provided by the invention, is introduced into the seed simple grain in kind of case or many in advance at grain conductor and then enters outside in grain conductor, then by the folding of cave opener, seed being sown in kind of cave, and then completing sowing.Such structure setting can have seed to sow at each sowing mechanism, thereby effectively avoid the appearance in hole in the time sowing, and has improved the output of crops.
Brief description of the drawings
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the pneumatic sower of the present invention;
Fig. 2 is the partial structurtes schematic diagram of the pneumatic sower of the present invention;
Fig. 3 is the power set structural representation of the pneumatic sower of the present invention;
Fig. 4 is cave opener structural representation of the present invention.
In figure, 1: tension frame; 2: air accumulator; 3: plant case; 4: frame; 5: adjust spring; 6: earthing wheel support arm; 7: earthing wheel; 8: seed adjustment case; 9: sowing mechanism; 10: fertilizing mechanism; 11: main land wheel; 12: land wheel support arm; 13: grain conductor; 14: outer grain conductor; 15: outer fertilizer guiding tube; 16: cave opener; 17: fertilizer guiding tube; 18: sowing power set; 19: drive cave power set; 20: linkage board; 21: open cave lever; 22: the first gears; Open cave sheet at 23: the first; Open cave sheet at 24: the second; 25: the second gears.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, will technical scheme of the present invention be carried out to clear, complete description below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, all other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belong to the scope that the present invention protects.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
As shown in drawings, pneumatic sower provided by the invention, comprises frame 4, tension frame 1, plants case 3 and at least one sowing mechanism 9;
Tension frame 1 is arranged on one end of frame 4, for being connected with tractor to frame 4 onward impulses;
Plant case 3 and be arranged on frame 4 tops, be connected with the sowing mechanism 9 that is positioned at frame 4 belows by grain conductor 13;
Sowing mechanism 9 comprises sowing power set 18, opens cave power set 19, outer grain conductor 14, cave opener 16, opens cave lever 21 and linkage board 20;
Sowing power set 18 are fixedly installed in frame 4;
Sowing power set 18 are connected with outer grain conductor 14, can drive outer grain conductor 14 to move;
The upper end of outer grain conductor 14 is connected with grain conductor 13, and lower end is connected with cave opener 16;
Open one end of cave lever 21 and a side of cave opener 16 is connected, the other end is connected with linkage board 20;
One end of linkage board 20 connects drives cave power set 19;
Driving cave power set 19 is fixedly installed in frame 4.
Outer grain conductor 14 is slidably socketed with grain conductor 13, rises and accepts seed and positioning action; Cave opener 16 is hinged on outer grain conductor 14 bottoms, driving cave power set 19, open timing under the effect of cave lever 21 and linkage board 20 and open and close, when cave opener 16 is descending, closes completely, and instantaneous opening when up, plays storage, opens cave and release seed.
Sowing power set 18 drive outer grain conductor 14 descending, now, drive cave power set 19 and do not start, and cave opener 16 is not worked.When outside sowing power set 18 drive, grain conductor 14 comes downwards to least significant end, be after cave opener 16 enters in soil, driving cave power set 19 starts, cave opener 16 is worked, open cave, seed in grain conductor 14 from grain conductor 13 enters, under self gravitation effect, is fallen into the soil pit that cave opener 16 is outputed.After seeds fall, sowing power set 18 start, drives outer grain conductor 14 up, open cave power set 19 delayed startups, until seed from outer grain conductor 14 interior completely release after, closed cave opener 16, completes sowing work.
Further, outer grain conductor 14 is to tilting away from described tension frame 1 direction;
The angle of inclination of outer grain conductor 14 is 60 °.
Angle-inserting type can make cave opener 16 more effectively be inserted in soil, opens cave.
Further, the both sides of each sowing mechanism 9 are provided with fertilizing mechanism;
Fertilizing mechanism 10 comprises fertilising power set, opens cave power set 19, outer fertilizer guiding tube 15, cave opener 16, opens cave lever 21 and linkage board 20;
Fertilising power set are fixedly installed in frame 4;
Fertilising power set are connected with outer fertilizer guiding tube 15, can drive outer fertilizer guiding tube 15 to move;
The upper end of outer fertilizer guiding tube 15 is connected with the fertilizer guiding tube 17 that is connected fertile case, and lower end is connected with cave opener 16;
Open one end of cave lever 21 and a side of cave opener 16 is connected, the other end is connected with linkage board 20;
One end of linkage board 20 connects drives cave power set 19;
Driving cave power set 19 is fixedly installed in frame 4.
The structural similarity of fertilizing mechanism 10 and sowing mechanism 9, a side of planting case 3 in frame 4 arranges fertile case, by fertilizer guiding tube 17, fertilizer is entered to outer fertilizer guiding tube 15, and outer fertilizer guiding tube 15 lower ends connect cave openers 16, can realize and applying fertilizer with sowing to synchronize.
Now, linkage board 20 can share, and drives cave power set 19 and also can share, and fertilising power set replace with sowing power set 18,, in the time that sowing power set 18 drive sowing mechanism 9 to work, drive fertilizing mechanism 10 to work simultaneously.
Further, cave opener 16 comprises that first opens cave sheet 23 and second and open cave sheet 24;
First opens cave sheet 23 and second opens cave sheet 24 and is combined rear formation cone;
First opens on cave sheet 23 and is provided with the first gear 22, can rotate with the rotation of the first gear 22;
Second opens on cave sheet 24 and is provided with the second gear 25, can rotate with the rotation of the second gear 25;
The first gear 22 engages with the second gear 25;
The first gear 22 with open cave lever 21 and be connected, can open under the effect of cave lever 21, realize first and open cave sheet 23 and the second opening and closing of opening between cave sheet 24.
Cave opener 16 structures of sowing mechanism 9 and fertilizing mechanism 10 are identical.
First opens cave sheet 23 and second opens after cave sheet 24 closures, outward appearance be shaped as cone, in it, be cavity, be communicated with outer grain conductor 14, can make seed open cave sheet 23 and second from first and open between cave sheet 24 and pass through.
Open on cave sheet 23 and arrange and can drive first to open the first gear 22 that cave sheet 23 rotates first, open on cave sheet 24 and arrange and can drive second to open the second gear 25 that cave sheet 24 rotates second, the first gear 22 and the second gear 25 are engaged, make out cave lever 21 in the time driving the first gear 22 to rotate, can drive the second gear 25 to rotate round about simultaneously.Open cave lever 21 by linkage board 20 with drive cave power set 19 and be connected, make out cave power set 19 can drive out cave lever 21 to move, and then control the folding condition of cave opener 16.
It is to be noted, driving cave power set 19 can be the optional position that is connected to linkage board 20, and then the cave lever 21 of opening in multiple cave openers 16 of connection of linkage board 20 is connected, and then make one to drive cave power set 19 and drive multiple cave openers 16 to carry out synchronous on-off, improve operating efficiency, saved the energy.
Further, pneumatic sower also comprises main land wheel 11;
Main land wheel 11 is arranged on frame 4 one end near tension frame 1 by land wheel support arm 12.
Main land wheel 11 is arranged on to the dead ahead of outer grain conductor 14, by the support of main land wheel 11, carries out at work effective balance can to transplanter, reduce the vibrations of sowing mechanism 9 and fertilizing mechanism 10.
Further, pneumatic sower also comprises Triggering Control System;
Triggering Control System comprises data processor, approach switch and time-delay relay;
Data processor, approach switch and time-delay relay are all arranged in frame 4,
Approach switch is used for monitoring main land wheel 11 operating ranges, and transfers data to data processor;
Data processor receives after the data of approach switch, when judging that it reaches after predetermined stroke, drives sowing mechanism 9 to sow, and is transferred to time-delay relay time delayed signal;
Time-delay relay with drive cave power set 19 and be connected, for receiving after the signal of data processor, time-delay closing is driven cave power set 19.
Triggering Control System provides electric power by 12 volts of power supplys on tractor, relies on magnetic switch and time-delay relay etc. to be used for realizing the interlock of sowing mechanism 9 and fertilizing mechanism 10.Main land wheel 11 often turns over certain angle in the time rotating or arc length is laid a finger on switch, the sowing power set 18 of sowing mechanism 9 and drive cave power set 19 and do descending action under the control of data processor, start up moment when going downwards to after desired depth, Kai Xue mechanism timing is opened and is kept certain opening time, to facilitate the seed in grain conductor 13 is slipped to cave opener 16 to be in advance slipped to soil by deadweight, seed after being up to cave opener 16 openings and closing in kind of case 3 falls into by deadweight in grain conductor 13 again, so move in circles and realize the continuous operation of pneumatic sower.
Further, pneumatic sower also comprises earthing wheel 7;
Earthing wheel 7 is taken turns support arm 6 by earthing and is arranged on frame 4 one end away from tension frame 1.
Earthing wheel 7 is arranged on to the opposite side in the dead astern of outer grain conductor 14, when seed enters after soil pit, takes turns 7 pairs of soil pits by earthing and carry out earthing, and then ensure that seed can be not exposed in air, and then ensured the survival rate of seed.
Further, pneumatic sower also comprises adjustment spring 5;
One end of adjusting spring 5 is connected with frame 4, and the other end is connected with earthing wheel support arm 6, for regulating the height of earthing wheel 7.
Between earthing wheel support arm 6 and frame 4, arrange and adjust spring 5, can effectively adjust the height of earthing wheel 7, and then can adjust the earthing amount of soil pit, can ensure that the seed of every Plants is in the time that earthing amount demand is different, can regulate, and then ensure its growth demand.
Further, the power set of sowing mechanism 9 are hydraulic cylinder.
Power set in sowing mechanism 9, as sowed power set 18 and driving cave power set 19, it can be hydraulic cylinder, by the mode of hydraulic pressure, drives each parts to carry out work.
It is pointed out that it can be hydraulic cylinder, but be not only confined to hydraulic cylinder, it can also be other devices, as cylinder, as electric device etc., provides required power as long as can realize to each parts in transplanter.
Further, the power set of sowing mechanism 9 are cylinder;
In frame 4, be also provided with air compressor and air accumulator 2, the atmosphere storage that contains certain pressure producing when by the power take-off output rotatory force of tractor is at air accumulator 2, for cylinder provides power.
In the time sowing power set 18 and open cave power set 19 for cylinder, air compressor and air accumulator 2 can be set in frame 4, air accumulator 2 is connected by pipeline with each cylinder.The part producing due to pressure during in output rotatory force at the power take-off of tractor, can provide certain source of the gas for each cylinder, and then can reduce power consumption and the energy resource consumption of cylinder with the atmosphere storage of pressure in air accumulator 2.
Further, plant between case 3 and sowing mechanism 9 and be provided with seed adjustment case 8, for the seed in kind of case 3 is toggled it in sowing mechanism 9.
For ensureing that the seed in kind of case 3 can all not enter grain conductor 13; between kind of case 3 and sowing mechanism 9, be provided with seed adjustment case 8; the seed of planting in case 3 first passes through seed adjustment case 8; by seed adjustment case 8, seed is controlled; the seed that makes simultaneously to enter in every grain conductor 13 can only be one or several; and can not be to enter continuously, and then ensure that it can not become drilling.
Pneumatic sower provided by the invention, is introduced into the seed simple grain in kind of case 3 or many in advance at grain conductor 13 and then enters outside in grain conductor 14, then by the folding of cave opener 16, seed being sown in kind of cave, and then completing sowing.Such structure setting can have seed to sow at each sowing mechanism 9, thereby effectively avoid the appearance in hole in the time sowing, and has improved the output of crops.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a pneumatic sower, is characterized in that, comprises frame, tension frame, kind case and at least one sowing mechanism;
Described tension frame is arranged on one end of described frame, for being connected with tractor to described frame onward impulse;
Described kind of case is arranged on described frame top, is connected with the described sowing mechanism that is positioned at described frame below by grain conductor;
Sowing mechanism comprises sowing power set, opens cave power set, outer grain conductor, cave opener, opens cave lever and linkage board;
Described sowing power set are fixedly installed in described frame;
Described sowing power set are connected with described outer grain conductor, can drive described outer grain conductor to move;
The upper end of described outer grain conductor is connected with described grain conductor, and lower end is connected with described cave opener;
Describedly open one end of cave lever and a side of described cave opener is connected, the other end is connected with described linkage board;
Cave power set are driven described in connecting in one end of described linkage board;
The described cave power set of opening are fixedly installed in described frame.
2. pneumatic sower according to claim 1, is characterized in that, described outer grain conductor is to tilting away from described tension frame direction;
The angle of inclination of described outer grain conductor is 60 °.
3. pneumatic sower according to claim 1, is characterized in that, the both sides of each described sowing mechanism are provided with fertilizing mechanism;
Described fertilizing mechanism comprises fertilising power set, opens cave power set, outer fertilizer guiding tube, cave opener, opens cave lever and linkage board;
Described fertilising power set are fixedly installed in described frame;
Described fertilising power set are connected with described outer fertilizer guiding tube, can drive described outer fertilizer guiding tube to move;
The upper end of described outer fertilizer guiding tube is connected with the fertilizer guiding tube that is connected fertile case, and lower end is connected with described cave opener;
Describedly open one end of cave lever and a side of described cave opener is connected, the other end is connected with described linkage board;
Cave power set are driven described in connecting in one end of described linkage board;
The described cave power set of opening are fixedly installed in described frame.
4. according to the pneumatic sower described in claim 1 or 3, it is characterized in that, described cave opener comprises that first opens cave sheet and second and open cave sheet;
Described first opens cave sheet and described second opens cave sheet and is combined rear formation cone;
Described first opens on the sheet of cave and is provided with the first gear, can rotate with the rotation of described the first gear;
Described second opens on the sheet of cave and is provided with the second gear, can rotate with the rotation of described the second gear;
Described the first gear engages with described the second gear;
Described the first gear with described in open cave lever and be connected, can be under described effect of opening cave lever, realize described first and open cave sheet and described the second opening and closing of opening between the sheet of cave.
5. pneumatic sower according to claim 1, is characterized in that, also comprises main land wheel;
Described main land wheel is arranged on described frame one end near described tension frame by land wheel support arm.
6. pneumatic sower according to claim 5, is characterized in that, also comprises Triggering Control System;
Described Triggering Control System comprises data processor, approach switch and time-delay relay;
Described data processor, described approach switch and described time-delay relay are all arranged in described frame,
Described approach switch is used for monitoring described main land wheel operating range, and transfers data to described data processor;
Described data processor receives after the data of described approach switch, when judging that it reaches after predetermined stroke, drives described sowing mechanism to sow, and is transferred to described time-delay relay time delayed signal;
Described time-delay relay with described in drive cave power set and be connected, for receiving after the signal of described data processor, drive cave power set described in time-delay closing.
7. pneumatic sower according to claim 1, is characterized in that, also comprises earthing wheel and adjusts spring;
Described earthing wheel is taken turns support arm by earthing and is arranged on described frame one end away from described tension frame;
One end of described adjustment spring is connected with described frame, and the other end is connected with described earthing wheel support arm, for regulating the height of described earthing wheel.
8. pneumatic sower according to claim 1, is characterized in that, the power set of described sowing mechanism are hydraulic cylinder.
9. pneumatic sower according to claim 1, is characterized in that, the power set of described sowing mechanism are cylinder;
In described frame, be also provided with air compressor and air accumulator, the atmosphere storage that contains certain pressure producing when by the power take-off output rotatory force of tractor is at described air accumulator, for described cylinder provides power.
10. according to the pneumatic sower described in claim 1-9 any one, it is characterized in that, between described kind of case and described sowing mechanism, be provided with seed adjustment case, for the seed in described kind of case is toggled it in described sowing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411946.7A CN104170565B (en) | 2014-08-20 | 2014-08-20 | Pneumatic seeder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411946.7A CN104170565B (en) | 2014-08-20 | 2014-08-20 | Pneumatic seeder |
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| CN104170565A true CN104170565A (en) | 2014-12-03 |
| CN104170565B CN104170565B (en) | 2015-06-03 |
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| CN201410411946.7A Active CN104170565B (en) | 2014-08-20 | 2014-08-20 | Pneumatic seeder |
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| CN105144922A (en) * | 2015-09-16 | 2015-12-16 | 安庆市宜秀区永兴农机农艺综合发展专业合作社 | Pneumatic seeder |
| CN108738534A (en) * | 2018-08-09 | 2018-11-06 | 郭在斌 | A kind of soybean planting device |
| CN108901264A (en) * | 2018-08-31 | 2018-11-30 | 韩志冀 | Profound sowing bilateral trapezoid multilayer fertilising an animal-drawn seed plough |
| CN110881291A (en) * | 2019-12-26 | 2020-03-17 | 河北农哈哈机械集团有限公司 | Equal plant spacing seed sowing device |
| CN112075163A (en) * | 2020-08-14 | 2020-12-15 | 山东省农业机械科学研究院 | Dual-drive type on-film hole-opening seeding device and method |
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| CN112075163A (en) * | 2020-08-14 | 2020-12-15 | 山东省农业机械科学研究院 | Dual-drive type on-film hole-opening seeding device and method |
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| CN104170565B (en) | 2015-06-03 |
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