CN103416124A - Rape and wheat all-purpose seeder - Google Patents
Rape and wheat all-purpose seeder Download PDFInfo
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- CN103416124A CN103416124A CN2012103769524A CN201210376952A CN103416124A CN 103416124 A CN103416124 A CN 103416124A CN 2012103769524 A CN2012103769524 A CN 2012103769524A CN 201210376952 A CN201210376952 A CN 201210376952A CN 103416124 A CN103416124 A CN 103416124A
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Abstract
The invention discloses a rape and wheat all-purpose seeder and belongs to the technical field of seeders in agricultural machinery. The rape and wheat all-purpose seeder is characterized by comprising front furrow plough combination, rear furrow plough combination, a land wheel assembly, main frame combination, rotary tillage roller combination, suspension bracket combination, a central gearbox assembly, a fertilizer box assembly, a negative pressure main pipe, a positive pressure main pipe, an air pump assembly, a right seeder unit assembly, a left seeder unit assembly, middle transition shaft combination, auxiliary frame combination, double-disc opener fixing beam combination, a double-disc opener and pressing roller combination. The seeder has multiple functions of completing multiple processes of rotary tillage, stubble cleaning, ditching, effective fertilizing, seeding, pressing, and the like in one-step operation. The seeder is widely applicable to dry land operation and can be satisfactory to rice stubble field planting agronomic requirements. The rape and wheat all-purpose seeder is convenient to use, reliable in performance, high in work efficiency and capable of realizing fine-quantity seeding of the rape and direct seeding of crops such as the wheat.
Description
Technical field
The invention belongs to technical field of seeders in agricultural machinery, be specifically related to a kind of novel rape-wheat seeding machine that integrates the functions such as rotary tillage, stubble-cleaning, trench digging, fertilising, sowing, suppression.
Background technology
At present, the domestic degree of the mechanized cultivation to crops such as rape, wheats difference, the mechanized cultivation degree of wheat is far above rape.The few nonirrigated farmland district for preceding crop stalk overlay capacity, the wheat Mechanization sowing is respond well; And for the stalk overlay capacity large nonirrigated farmland district and rice Mai Lunzuoqu, the wheat mechanized cultivation exist facility easily stop up, by poor performance, sow the phenomenon such as easily broken seedling, thereby affect seeding quality and sowing efficiency.In addition, current wheat Mechanization sowing can not be opened the furrow ditch mostly, and carry out separately ditching operation, will certainly increase the sowing cost.The domestic plantation for rape still be take and is manually transplanted or first manually slip kind, broadcasts sowing traditional cropping pattern of rear thinning, final singling as main, though the artificial planting pattern can guarantee seeding quality by thinning, the final singling in later stage, but the operations such as its rotary tillage, stubble-cleaning, fertilising, trench digging are independently carried out, labour cost is high, operation intensity is large, production efficiency is low, thus the development of restriction China rape industry.And domestic rape production mechanization is live, not only have the damaged and large technical barrier of type hole plug two of seed, and it is difficult to realize precision drilling, the later stage operating cost is high.
In recent years, domestic multifunctional seed drill is applicable to the crops such as wheat, corn, paddy rice, rare high-quality rape, wheat dual-purpose type Multifunctional combine seeding machine tool mostly.For the problem existed in above-mentioned wheat, rapeseed cultivation process, develop a kind of novel naked oats dual-purpose type sower economic and practical, high-quality and high-efficiency and there is very important realistic meaning.
Summary of the invention
The objective of the invention is to provide a kind of operations such as rotary tillage, stubble-cleaning, trench digging, fertilising, sowing, suppression that integrate, high-quality, multi-purpose seeder with broad applicability, it can realize the multiple kinds of crops such as precision drilling rape or drilling wheat.
The present invention is directed to wheat cultivation, one-stop operation can complete rotary tillage, stubble-cleaning, opens the furrow ditch and plant the operations such as ditch, fertilising, sowing, earthing, the suppression of following an example, can realize wheat planting line-spacing, plant the agriculture requirements such as dark, fertile amount, fertile dark, the amount of broadcasting, overcome the applicable limitation defect of traditional wheat seeder.
The present invention is directed to rape seed, one-stop operation can complete rotary tillage, stubble-cleaning, open the furrow ditch and plant ditch, fertilising, sowing, earthing, the operation such as follow an example, thereby can realize rapeseed cultivation line-spacing, spacing in the rows, the amount of broadcasting, plant the agriculture requirements such as dark, fertile amount, fertile dark, seed manure spacing and greatly reduce labour cost, improved the quality of production and efficiency.
The present invention realizes by following technical proposal:
A kind of novel rape-wheat seeding machine, comprise front ditching plough combination 1, post-trenching plough combination 2, the rotary tillage rotor combination 5 of two of left and right, hanger bracket combination 6, central gearbox assembly 7, negative pressure house steward 9, malleation house steward 10, air pump assembly 11, right seeding-apparatus assembly 12, left seeding-apparatus assembly 13, middle transition axle combination 14, pack roller combination 18, it also comprises ground wheel assembly 3, slave frame combination 15, double disk opener built-in beam combination 16, double disk opener 17, fertile (kind) box assembly 8 and mainframe combination 4.Described mainframe combination 4 comprises front-axle beam 22, the back rest 23, two of left and right master plate 20, soil-suppressing board 24 and front ditching plough fixed mount 19 and post-trenching plough fixed mount 21, two front-axle beams 22 and the back rest 23 and two master plates 20 link into an integrated entity, front ditching plough fixed mount 19, post-trenching plough fixed mount 21 are arranged on respectively the place ahead and the rear of two master plates 20, and soil-suppressing board 24 is fixed on the rear of the back rest 23; Central authorities' gearbox assembly 7 is fixed on the centre of two front-axle beams 22; Hanger bracket combination 6 is fixed on the front-axle beam 22 and the back rest 23 of mainframe combination 4; The rotary tillage rotor combination 5 of two of left and right all is positioned at front-axle beam 22 belows, and links into an integrated entity by central gearbox assembly 7, and the rotary tillage in left side divides rotor combination 5 to be connected and fixed with left side master plate 20, and the rotary tillage on right side divides rotor combination 5 to be connected and fixed with right side master plate 20; Described ground wheel assembly 3 comprises land wheel 25, land wheel support arm 26, land axle combination 27, freewheel clutch 29, power input sprocket 28, change gear case 30, intermediate transmission sprocket wheel 31 and land wheel Connection Card 32, described land wheel Connection Card 32 is fixedly connected with front-axle beam 22, land wheel support arm 26 and hanger bracket combination 6 be fixedly connected with (wheel assembly 3 be two covers, its left and right is arranged on the place ahead of front-axle beam 20, and its upper-lower position is adjustable); Described front ditching plough combination 1 is connected with front ditching plough fixed mount 19; The combination 2 of described post-trenching plough is connected with post-trenching plough fixed mount 21; Described double disk opener built-in beam combination 16 is arranged on the inboard of left and right master plate 20 and is positioned at the rear of soil-suppressing board 24; The uniform rear that is arranged on double disk opener built-in beam combination 16 of described double disk opener 17; Described pack roller combination 18 is fixed on the rear of double disk opener built-in beam combination 16; Described air pump assembly 11 be positioned at central gearbox assembly 7 directly over, and be connected and fixed with central gearbox assembly 7; Described fertilizer (kind) box assembly 8 comprises row fat sprocket 37, amount of seed metering adjusting device 38, casing 39, fertile case side plate 40, fertilizer regulating mechanism 41, seeding sprocket wheel 42 and central dividing plate 43, and fertile (kind) box assembly 8 is positioned at the top of mainframe combination 4; Described middle transition combination 14 be fastened on the back rest 23 directly over and be positioned at the inboard of left and right master plate 20; Described slave frame combination 15 comprises slave frame support arm 33, slave frame crossbeam 34, negative pressure distributing pipe 35 and malleation distributing pipe 36, and described slave frame combination 15 is arranged on the top of double disk opener built-in beam combination 16 by slave frame support arm 33; Described left seeding-apparatus assembly 13 is arranged on the left side of slave frame crossbeam 34, and described right seeding-apparatus assembly 12 is arranged on the right side of slave frame crossbeam 34.Described negative pressure house steward's 9 two ends are connected with negative pressure distributing pipe 35 with air pump assembly 11 respectively, and described malleation house steward's 10 two ends are connected with malleation distributing pipe 36 with air pump assembly 11 respectively.
Described freewheel clutch 29 is arranged on the output shaft of change gear case 30, by the power of ground wheel assembly 3, divides two-way input in parallel middle transition axle combination 14.
The invention has the beneficial effects as follows:
1, this novel rape-wheat seeding machine can be realized rape essence amount combined sowing, and one-stop operation can complete rotary tillage, stubble-cleaning simultaneously, open the operations such as furrow ditch, fertilising, precision drilling, earthing.
2, this novel rape-wheat seeding machine can be realized the wheat combined sowing, the operations such as one-stop operation can complete rotary tillage, stubble-cleaning simultaneously, open kind of ditch or furrow ditch, fertilising, sowing, earthing, the suppression of following an example.
3, this novel naked oats dual-purpose type sower has adaptability preferably, both can be at working on farm land, also can be in the rice stubble field non-ploughing operation, and its production efficiency is high, operation quality good.
The accompanying drawing explanation
Fig. 1: be the rape-wheat seeding machine structural representation.
Fig. 2: be the main frame structure schematic diagram.
Fig. 3: be land wheel assembly structure schematic diagram.
Fig. 4: be slave frame combining structure schematic diagram.
Fig. 5: be double disk opener and built-in beam combining structure schematic diagram thereof.
Fig. 6: be fertile (kind) box assembly structural representation.
Fig. 7: be rape-wheat seeding machine transmission system schematic diagram.
In figure, number: 1. front ditching plough combination, 2. post-trenching plough combination, 3. wheel assembly, 4. mainframe combination, 5. rotary tillage rotor combination, 6. hanger bracket combination, 7. central gearbox assembly, 8. fertile (kind) box assembly, 9. negative pressure house steward, 10. malleation house steward, 11. air pump assembly, 12. right seeding-apparatus assembly, 13. left seeding-apparatus assembly, 14. middle transition axle combination, 15. slave frame combination, 16. double disk opener built-in beam combination, 17. double disk opener, 18. pack roller combination, 19. front ditching plough fixed mount, 20. master plate, 21. post-trenching plough fixed mount, 22. front-axle beam, 23. the back rest, 24. soil-suppressing board, 25. land wheel, 26. land wheel support arm, 27.. land axle combination, 28. power input sprocket, 29. freewheel clutch, 30. change gear case, 31. intermediate transmission sprocket wheel, 32. land wheel Connection Card, 33. slave frame support arm, 34. slave frame crossbeam, 35. negative pressure distributing pipe, 36. malleation distributing pipe, 37. row fat sprocket, 38. amount of seed metering adjusting device, 39. casing, 40. fertile case side plate, 41. fertilizer regulating mechanism, 42. seeding sprocket wheel, 43. central dividing plate, 44. feed shaft, 45. seeding unit, 46. fertilizer expelling shaft, 47. fertilizer apparatus.
Specific embodiments
By reference to the accompanying drawings the present invention is made further instructions.
As shown in Figure 1, the present embodiment provides a kind of design of novel rape-wheat seeding machine, comprise front ditching plough combination 1, post-trenching plough combination 2, mainframe combination 4, the rotary tillage rotor combination 5 of two of left and right, hanger bracket combination 6, central authorities' gearbox assembly 7, negative pressure house steward 9, malleation house steward 10, air pump assembly 11, the right seeding-apparatus assembly 12(patent No. 200620172781.3), left seeding-apparatus assembly 13, middle transition axle combination 14, pack roller combination 18, ground wheel assembly 3, slave frame combination 15, double disk opener built-in beam combination 16, double disk opener 17, fertile (kind) box assembly 8, mainframe combination 4 comprises front-axle beam 22, the back rest 23, two of left and right master plate 20, soil-suppressing board 24 and front ditching plough fixed mount 19 and post-trenching plough fixed mount 21, two front-axle beams 22 and the back rest 23 and two master plates 20 link into an integrated entity, front ditching plough fixed mount 19, post-trenching plough fixed mount 21 are arranged on respectively the place ahead and the rear of two master plates 20, and soil-suppressing board 24 is fixed on the rear (see figure 2) of the back rest 20, central authorities' gearbox assembly 7 is fixed on the centre of two front-axle beams 22, hanger bracket combination 6 is fixed on the front-axle beam 22 and the back rest 23 of mainframe combination 4, the rotary tillage rotor combination 5 of two of left and right all is positioned at front-axle beam 22 belows, and links into an integrated entity by central gearbox assembly 7, and the rotary tillage in left side divides rotor combination 5 to be connected and fixed with left side master plate 20, and the rotary tillage on right side divides rotor combination 5 to be connected and fixed with right side master plate 20, described ground wheel assembly 3 comprises that land wheel 25, land wheel support arm 26, land axle combination 27, freewheel clutch 29, power input sprocket 28, change gear case 30, intermediate transmission sprocket wheel 31 and land wheel Connection Card 32(are shown in Fig. 3), described land wheel Connection Card 32 is fixedly connected with front-axle beam 22, and land wheel support arm 26 is fixedly connected with hanger bracket combination 6, described front ditching plough combination 1 is connected with front ditching plough fixed mount 19, the combination 2 of described post-trenching plough is connected with post-trenching plough fixed mount 21, described double disk opener built-in beam combination 16(is shown in Fig. 5) be arranged on the inboard of left and right master plate 20 and be positioned at the rear of soil-suppressing board 24, the uniform rear (see figure 5) that is arranged on double disk opener built-in beam combination 16 of described double disk opener 17, described pack roller combination 18 is fixed on the rear of double disk opener built-in beam combination 16, described air pump assembly 11 be positioned at central gearbox assembly 7 directly over, and be connected and fixed with central gearbox assembly 7, described fertilizer (kind) box assembly 8 comprises that row fat sprocket 37, amount of seed metering adjusting device 38, casing 39, fertile case side plate 40, fertilizer regulating mechanism 41, seeding sprocket wheel 42 and central dividing plate 43(are shown in Fig. 6), fertile (kind) box assembly 8 is positioned at the top of mainframe combination 4, described middle transition combination 14 be fastened on the back rest 23 directly over and be positioned at the inboard of left and right master plate 20, described slave frame combination 15 comprises that slave frame support arm 33, slave frame crossbeam 34, negative pressure distributing pipe 35 and malleation distributing pipe 36(are shown in Fig. 4), described slave frame combination 15 is arranged on the top of double disk opener built-in beam combination 16 by slave frame support arm 33, described left seeding-apparatus assembly 13 is arranged on the left side of slave frame crossbeam 34, and described right seeding-apparatus assembly 12 is arranged on the right side of slave frame crossbeam 34, described negative pressure house steward's 9 two ends are connected with negative pressure distributing pipe 35 with air pump assembly 11 respectively, and described malleation house steward's 10 two ends are connected with malleation distributing pipe 36 with air pump assembly 11 respectively.
Operation principle of the present invention:
When the novel rape-wheat seeding machine of the present embodiment is used for sowing wheat, once can sow 8 row wheats.Before sowing, the combination of removal slave frame, left seeding-apparatus assembly, right seeding-apparatus assembly, equipped 8 cover double disk openers, and the central dividing plate in fertile (kind) box assembly is vertically placed to separate seed and fertilizer.According to different farming environment, adjust ditching depth and the angle of front ditching plough combination, the combination of post-trenching plough, adjusting the rotary tillage degree of depth makes the tilling depth of two the rotary tillage rotor combinations in left and right in the 100mm left and right, adjust the installation site of ground wheel assembly, adjustment amount of seed metering adjusting device, fertilizer regulating mechanism make it meet agriculture requirement.Wheel assembly totally two covers in ground is installed on girder the place ahead, each is a set of for left side, right side, for driving the combination of middle transition axle, power is by middle transition axle combination minute two-way output, one road power passes to fertilizer expelling shaft to drive fertilizer apparatus to carry out fertilizer through row fat sprocket, and another road power passes to feed shaft to drive seeding unit to carry out seeding through the seeding sprocket wheel.During sowing, the tractor-drawn sower advance and by universal joint to central gearbox assembly transferring power.In walking process, both sides furrow ditch is outputed in left and right two cover front ditching plough combinations, post-trenching plough combination acting in conjunction; Central authorities' gearbox assembly drives rotary tillage rotor combination rotary tillage stubble-cleaning; The ground wheel assembly drives fertilizer apparatus, seeding unit to carry out fertilizer, seeding; Pack roller combination realizes following an example suppression, thereby completes rotary tillage, stubble-cleaning, the earthing of novel rape-wheat seeding machine when the sowing wheat, open furrow ditch and the functions such as kind ditch, fertilising, the suppression of sowing, follow an example.
When the novel rape-wheat seeding machine of the present embodiment is used for sowing rape, once can sow 6 row rape seed.Before sowing, removal pack roller combination, equipped 6 cover double disk openers, adjust fertilizer regulating mechanism and make it meet agriculture requirement, and by the central dividing plate removal in fertile (kind) box assembly or slant setting to increase fertile case volume.The ground wheel assembly passes to the combination of middle transition axle by power via power input sprocket, intermediate transmission sprocket wheel, change gear case and freewheel clutch, the combination of middle transition axle divides two-way output by power, one road power passes to fertilizer expelling shaft to drive fertilizer apparatus to carry out fertilizer through row fat sprocket, and another road power is respectively used to drive left seeding-apparatus assembly and right seeding-apparatus assembly.During sowing, the tractor-drawn sower advance and by output shaft to central gearbox assembly transferring power.In walking process, both sides furrow ditch is outputed in left and right two cover front ditching plough combinations, post-trenching plough combination acting in conjunction; Central authorities' gearbox assembly drives rotary tillage rotor combination rotary tillage stubble-cleaning, drives the air pump assembly simultaneously; The ground wheel assembly drives fertilizer apparatus and left seeding-apparatus assembly, right seeding-apparatus assembly to carry out fertilizer, seeding, thereby realizes the functions such as the rotary tillage of novel rape-wheat seeding machine when the sowing rape, stubble-cleaning, earthing, trench digging, fertilising, precision drilling.
Novel rape-wheat seeding machine provided by the invention is a kind of multi-functional, dual-purpose type sower, and it can sow rape seed, can sow the multiple kinds of crops such as wheat, corn, soybean again; One-stop operation can complete the multinomial operations such as rotary tillage, stubble-cleaning, trench digging, earthing, fertilising, the suppression of sowing, follow an example.The present invention has good adaptability to soil, not only can adapt to the nonirrigated farmland district operation that a large amount of stalks cover, and also can adapt to rape, the wheat precision drilling of toothing paddy plate field, and its tillage operation quality is high, the stubble-cleaning ability is strong.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, does not break away from the spirit and scope of technical solution of the present invention and technical scheme of the present invention is modified or replaced on an equal basis, all should be encompassed in claim scope of the present invention.
Claims (3)
1. a rape-wheat seeding machine, comprise front ditching plough combination (1), post-trenching plough combination (2), two the rotary tillage rotor combinations in left and right (5), hanger bracket combination (6), central authorities' gearbox assembly (7), negative pressure house steward (9), malleation house steward (10), air pump assembly (11), right seeding-apparatus assembly (12), left seeding-apparatus assembly (13), middle transition axle combination (14), pack roller combination (18), it is characterized in that, it also comprises ground wheel assembly (3), slave frame combination (15), double disk opener built-in beam combination (16), double disk opener (17), fertile (kind) box assembly (8) and mainframe combination (4), described mainframe combination (4) comprises front-axle beam (22), the back rest (23), two the master plates in left and right (20), soil-suppressing board (24) and front ditching plough fixed mount (19) and post-trenching plough fixed mount (21), two front-axle beams (22) and the back rest (23) link into an integrated entity with two master plates (20), front ditching plough fixed mount (19), post-trenching plough fixed mount (21) are arranged on respectively the place ahead and the rear of two master plates (20), and soil-suppressing board (24) is fixed on the rear of the back rest (23), central authorities' gearbox assemblies (7) are fixed on the centre of two front-axle beams (22), hanger bracket combination (6) is fixed on the front-axle beam (22) and the back rest (23) of mainframe combination (4), two the rotary tillage rotor combinations in left and right (5) all are positioned at front-axle beam (22) below, and link into an integrated entity by central gearbox assembly (7), the rotary tillage in left side divides rotor combination (5) and left side master plate (20) to be connected and fixed, and the rotary tillage on right side divides rotor combination (5) and right side master plate (20) to be connected and fixed, described ground wheel assembly (3) comprises land wheel (25), land wheel support arm (26), land axle combination (27), freewheel clutch (29), power input sprocket (28), change gear case (30), intermediate transmission sprocket wheel (31) and land wheel Connection Card (32), described land wheel Connection Card (32) is fixedly connected with front-axle beam (22), and land wheel support arm (26) is fixedly connected with hanger bracket combination (6), described front ditching plough combination (1) is connected with front ditching plough fixed mount (19), described post-trenching plough combination (2) is connected with post-trenching plough fixed mount (21), described double disk opener built-in beam combination (16) is arranged on the inboard of left and right master plate (20) and is positioned at the rear of soil-suppressing board (24), the uniform rear that is arranged on double disk opener built-in beam combination (16) of described double disk opener (17), described pack roller combination (18) is fixed on the rear of double disk opener built-in beam combination (16), described air pump assembly (11) be positioned at central gearbox assembly (7) directly over, and be connected and fixed with central gearbox assembly (7), described fertilizer (kind) box assembly (8) comprises row fat sprocket (37), amount of seed metering adjusting device (38), fertile case overall (39), fertile case side plate (40), fertilizer regulating mechanism (41), seeding sprocket wheel (42) and central dividing plate (43), and fertile (kind) box assembly 8 is positioned at the top of mainframe combination (4), described middle transition combination (14) be fastened on the back rest (23) directly over and be positioned at the inboard of left and right master plate (20), described slave frame combination (15) comprises slave frame support arm (33), slave frame crossbeam (34), negative pressure distributing pipe (35) and malleation distributing pipe (36), and described slave frame combination (15) is arranged on the top of double disk opener built-in beam combination (16) by slave frame support arm (33), described left seeding-apparatus assembly (13) is arranged on the left side of slave frame crossbeam (34), and described right seeding-apparatus assembly (12) is arranged on the right side of slave frame crossbeam (34).Described negative pressure house steward's (9) two ends are connected with negative pressure distributing pipe (35) with air pump assembly (11) respectively, and described malleation house steward's (10) two ends are connected with malleation distributing pipe (36) with air pump assembly (11) respectively.
2. novel rape-wheat seeding machine according to claim 1, is characterized in that described ground wheel assembly (3) is two covers, and its left and right is arranged on the place ahead of front-axle beam (20), and its upper-lower position is adjustable.
3. according to claim 1 and 2 described novel rape-wheat seeding machines, it is characterized in that described freewheel clutch (29) is arranged on the output shaft of change gear case (30), by the power of ground wheel assembly (3), divide two-way input in parallel middle transition axle combination (14).
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| CN2012103769524A CN103416124A (en) | 2012-10-08 | 2012-10-08 | Rape and wheat all-purpose seeder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104335726A (en) * | 2014-10-27 | 2015-02-11 | 滨州市农业机械化科学研究所 | Summer cotton precision no-tillage planter capable of realizing seedling strip cleaning |
| CN105960901A (en) * | 2016-05-16 | 2016-09-28 | 安徽农业大学 | No-tillage stubble cleaning and dibbling machine |
| CN106358518A (en) * | 2016-09-29 | 2017-02-01 | 湖南农业大学 | Multiaxial shallow tillage ditching machine for transplanting rape |
| CN107306524A (en) * | 2017-06-23 | 2017-11-03 | 华中农业大学 | Driving trench digging site preparation all-in-one |
| CN108353554A (en) * | 2018-03-05 | 2018-08-03 | 华中农业大学 | Rice stubble field non-ploughing rape no-tillage essence amount seed-sowing machine |
| CN109392337A (en) * | 2018-11-30 | 2019-03-01 | 北京德邦大为科技股份有限公司 | A kind of leveling screw and its application method |
| CN109566029A (en) * | 2019-02-01 | 2019-04-05 | 东北林业大学 | A kind of the disengaging type land wheel and its transmission device of air seeder |
| CN110574514A (en) * | 2019-09-11 | 2019-12-17 | 华中农业大学 | Rice stubble field rape covers grass seeder |
| CN111512720A (en) * | 2020-04-07 | 2020-08-11 | 华中农业大学 | Rape precision direct seeding machine based on crawler-type combined harvesting power platform |
| CN111990000A (en) * | 2020-07-22 | 2020-11-27 | 华中农业大学 | Wide folding no-tillage double-furrow fertilizing and seeding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107306524A (en) * | 2017-06-23 | 2017-11-03 | 华中农业大学 | Driving trench digging site preparation all-in-one |
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