CN108934232B - Universal suspension type self-positioning corn seeder - Google Patents
Universal suspension type self-positioning corn seeder Download PDFInfo
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- CN108934232B CN108934232B CN201810624924.7A CN201810624924A CN108934232B CN 108934232 B CN108934232 B CN 108934232B CN 201810624924 A CN201810624924 A CN 201810624924A CN 108934232 B CN108934232 B CN 108934232B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B49/00—Combined machines
- A01B49/04—Combinations of soil-working tools with non-soil-working tools, e.g. planting tools
- A01B49/06—Combinations of soil-working tools with non-soil-working tools, e.g. planting tools for sowing or fertilising
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Abstract
The invention discloses a general suspension type self-positioning corn seeder, which comprises a fertilizer box, wherein the back surface of the fertilizer box is fixedly connected with a seeder pulling plate, the top surface of the seeder pulling plate is fixedly connected with a pulling plate fixing bolt, the bottom of an inner cavity of the fertilizer box is provided with a fertilizer outlet, the bottom of the fertilizer box is fixedly connected with a hydraulic oil tank, the surface of the hydraulic oil tank is fixedly connected with a hydraulic oil pipe, the surface of the hydraulic oil pipe is fixedly connected with a hydraulic motor, and the surface of the hydraulic oil pipe is fixedly connected with a fertilizer baffle. The quantity of self-align spring is two, and two self-align spring distributions are two at the top surface and the bottom surface of box fixed plate, and the quantity of plough groove spring is two, and two plough groove springs distribute respectively in the top and the bottom of plough fixed plate for when meetting the uneven ground of height during the seeding, reduce jolting of seeder, effectual moving away to avoid possible earthquakes has reached and has let the more steady effect of process of seeding.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a general suspension type self-positioning corn seeder.
Background
Corn is an annual cross-pollinated plant with the same male and female plants, has tall and big plants and strong stems, is an important food crop and feed crop, is also the crop with the highest total yield all over the world, and has the planting area and the total yield which are second to rice and wheat. Corn has been praised as a long-life food all the time, contains rich protein, fat, vitamins, trace elements, cellulose and the like, and has great potential for developing high-nutrition and high-biological function foods. However, due to the complex inheritance and rich variation types, the defects of overlong period, overlarge variation coefficient and influence on the growth and development of filial generation exist in the conventional breeding process, and the corn growth period refers to the days from sowing to maturing of new seeds. The growth period is different according to the difference of environmental conditions such as variety, seeding time, illumination, temperature and the like, and generally, the growth period is short under the conditions of early-maturing variety, late seeding and high temperature, and is long otherwise. The whole growth period of the corn is divided into main development periods of seeding, seedling emergence, three leaves, seven leaves, jointing, emasculation, flowering, grouting, milk maturity, maturity and the like. The sowing period is the date of the day of sowing, and the emergence rate of seedlings which are not in the whole field and are about 2-3 cm high in emergence period is more than 60%. The stem node of the base of the plant with the node-pulling period of more than 60 percent of the whole field begins to extend. The upper leaves of the plants with the large flare period of more than 60 percent of the whole field are in a flare shape. The method is characterized in that the tip of the tassel of a plant with a tassel period of more than 60% of the whole field is exposed out of the top leaf by 3-5 cm, the filament of the female ear of a plant with a tassel period of more than 60% of the whole field is exposed out of the bud leaf, the plant seed with a mature period of more than 90% of the whole field is hardened and presents the inherent color and luster of the variety, the seed milk line disappears, the corn seeder is a planting machine taking crop corn seeds as a seeding object, and the method has the characteristics of uniform seeding, consistent depth, stable row spacing, good soil covering, seed saving, high working efficiency and the like.
Disclosure of Invention
The invention aims to provide a general suspension type self-positioning corn seeder, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a universal suspension type self-positioning corn planter comprises a fertilizer box, wherein a seeder pulling plate is fixedly connected to the back surface of the fertilizer box, a pulling plate fixing bolt is fixedly connected to the top surface of the seeder pulling plate, a fertilizer outlet is formed in the bottom of an inner cavity of the fertilizer box, a hydraulic oil tank is fixedly connected to the bottom of the fertilizer box, a hydraulic oil pipe is fixedly connected to the surface of the hydraulic oil tank, a hydraulic motor is fixedly connected to the surface of the hydraulic oil pipe, a fertilizer baffle is fixedly connected to the surface of the hydraulic oil pipe, a hydraulic oil pipe baffle is fixedly connected to the bottom of the fertilizer box, a self-positioning groove is formed in one side of the fertilizer box, a first fixing baffle is fixedly connected to the surface of the self-positioning groove, a self-positioning spring is movably connected to the surface of the self-positioning groove, a box, the surface of the box body fixing plate is fixedly connected with a box body connecting plate, one end of the box body connecting plate, far away from the box body fixing plate, is fixedly connected with a seeding box body, the other side of the fertilizer box is provided with a plough groove, the surface of the plough groove is fixedly connected with a second fixing baffle, the surface of the plough groove is movably connected with a plough groove spring, one end of the plough groove spring, far away from the plough groove, is fixedly connected with a plough fixing plate, the surface of the plough fixing plate is fixedly connected with a plough, the surface of the plough is fixedly connected with a synchronizing rod, one end of the synchronizing rod, far away from the plough, is fixedly connected with the bottom surface of the seeding box body, the surface of the seeding box body is provided with a seeding hole, the inner wall of the seeding hole is fixedly connected with a seeding pipe, the inside of the seeding box body is provided with a corn seed box, the top surface of, one end of the first feeding roller bracket, which is far away from the inner wall of the corn seed box, is fixedly connected with a first feeding roller, the surface of the first feeding roller is in transmission connection with a conveyor belt, the surface of the conveyor belt is fixedly connected with a feeding plate, the inner wall of the conveyor belt, which is far away from the first feeding roller, is in transmission connection with a second feeding roller, the surface of the second feeding roller is fixedly connected with a second feeding roller bracket, the surface of the second feeding roller bracket is fixedly connected with a transmission motor, the top of the inner cavity of the corn seed box is provided with a seed inlet, the top of the seed inlet is fixedly connected with a seed inlet funnel, the bottom of the corn seed box is fixedly connected with a soil burying rod, the bottom of the soil burying rod is fixedly connected with a soil burying plate, the surface of the fertilizer box is fixedly connected with a box wheel fixing plate, the surface of the box wheel rod is fixedly connected with a box wheel.
Preferably, the hydraulic oil pipe baffle is positioned at the bottom of the fertilizer box and close to the fertilizer outlet.
Preferably, the surface of the box fixing plate is fixedly connected with a box fixing block, and the surface of the plough fixing plate is fixedly connected with a plough fixing block.
Preferably, the number of the self-positioning springs is two, and the two self-positioning springs are respectively distributed at the top and the bottom of the box body fixing plate.
Preferably, the number of the plough trough springs is two, and the two plough trough springs are respectively distributed at the top and the bottom of the plough fixing plate.
Preferably, the inner wall of the seeding pipe is funnel-shaped with a wide upper part and a narrow lower part.
Preferably, the bottom surface of the inner cavity of the corn seed box is an inclined plane which is inclined from the seed feeding port to the first feeding roller bracket.
Preferably, the surface of the second feeding roller bracket, which is positioned at the position close to the seed feeding opening of the sowing box body, is provided with a second feeding roller.
Advantageous effects
The utility model provides a general floated self-align corn drill possesses following beneficial effect:
1. this general floated self-align corn drill, quantity through self-align spring is two, and two self-align spring distributions are two at the top surface and the bottom surface of box fixed plate, and the quantity of plough groove spring is two, and two plough groove springs distribute respectively in the top and the bottom of plough fixed plate for when meetting the ground of height unevenness during the seeding, reduce jolting of seeder, effectual moving away to avoid possible earthquakes, reached and let the more steady effect of process of seeding.
2. The general suspension type self-positioning corn seeder is characterized in that a self-positioning groove is formed in the surface of a fertilizer box, the surface of the self-positioning groove is connected with a first fixed baffle, the surface of the self-positioning groove is connected with a self-positioning spring, the self-positioning spring is connected with the surface of a box body fixed plate, the box body fixed plate is connected with a box body connecting plate, the box body connecting plate is connected with a seeding box body, the surface of a plough groove is connected with a second fixed baffle, the surface of the plough groove is connected with a plough groove spring, the plough groove spring is connected with a plough fixed plate, the plough fixed plate is connected with a plough, the plough is connected, when meeting the bottom surface with different heights, the plow and the box body fixing plate can move up and down through the self-positioning groove and the plow groove, and the current height of the plow and the seeding box body is kept unchanged, so that the seeder can adapt to different ground heights, and the effect that the seeder can automatically position the height to ensure the consistent corn seeding distance is achieved.
Drawings
FIG. 1 is a schematic side sectional view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a bottom view of the present invention;
FIG. 4 is a schematic side sectional view of the fertilizer box of the present invention;
FIG. 5 is an enlarged view of the structure of the present invention at A.
In the figure: 1 fertilizer box, 2 seeder arm-tie, 3 arm-tie fixing bolt, 4 fertilizer outlet, 5 hydraulic oil tank, 6 hydraulic oil pipe, 7 hydraulic motor, 8 fertilizer baffle, 9 hydraulic oil pipe baffle, 10 self-positioning groove, 11 first fixing plate, 12 self-positioning spring, 13 box fixing plate, 14 box connecting plate, 15 seeding box, 16 plough groove, 17 second fixing baffle, 18 plough groove spring, 19 plough fixing plate, 20 plough, 21 synchronizing rod, 22 sowing holes, 23 sowing pipes, 24 corn seed boxes, 25 seed feeding ports, 26 first feeding roller supports, 27 first feeding rollers, 28 conveyor belts, 29 feeding plates, 30 second feeding rollers, 31 second feeding roller supports, 32 transmission motors, 33 seed feeding ports, 34 seed feeding hoppers, 35 soil burying rods, 36 soil burying plates, 37 box wheel fixing plates, 38 box wheel rods, 39 box wheels, 40 box body fixing blocks and 41 plough fixing blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a general suspension type self-positioning corn planter comprises a fertilizer box 1, wherein a seeder pull plate 2 is fixedly connected to the back of the fertilizer box 1, a pull plate fixing bolt 3 is fixedly connected to the top surface of the seeder pull plate 2, a fertilizer outlet 4 is formed in the bottom of an inner cavity of the fertilizer box 1, a hydraulic oil tank 5 is fixedly connected to the bottom of the fertilizer box 1, a hydraulic oil pipe 6 is fixedly connected to the surface of the hydraulic oil tank 5, a hydraulic motor 7 is fixedly connected to the surface of the hydraulic oil pipe 6, a fertilizer baffle 8 is fixedly connected to the surface of the hydraulic oil pipe 6, the hydraulic oil pipe baffle 9 is positioned at the position, close to the fertilizer outlet 4, of the bottom of the fertilizer box 1, so that the hydraulic oil pipe 6 cannot extend over the head, a hydraulic oil pipe baffle 9 is fixedly connected to the bottom of the fertilizer box 1, a self-positioning groove 10 is formed in one side of the fertilizer box 1, a first fixing, the number of the self-positioning springs 12 is two, and the two self-positioning springs 12 are respectively distributed at the top and the bottom of the box body fixing plate 13, so that the box body fixing plate 13 can effectively absorb shock when moving up and down, one end of the self-positioning spring 12 far away from the self-positioning groove 10 is fixedly connected with the box body fixing plate 13, the surface of the box body fixing plate 13 is fixedly connected with a box body fixing block 40, the surface of the plow fixing plate 19 is fixedly connected with a plow fixing block 41, so that the box body fixing plate 13 and the plow fixing plate 19 can be fixed in the self-positioning groove 10 and the plow groove 16 without falling out, the surface of the box body fixing plate 13 is fixedly connected with a box body connecting plate 14, one end of the box body connecting plate 14 far away from the box body fixing plate 13 is fixedly connected with a seeding box body 15, the other side of the fertilizer box 1 is provided with a plow groove 16, the, the number of the plow groove springs 18 is two, the two plow groove springs 18 are respectively distributed at the top and the bottom of the plow fixing plate 19, the number of the self-positioning springs 12 is two, the two self-positioning springs 12 are distributed at the top and the bottom of the box fixing plate 13, the number of the plow groove springs 18 is two, the two plow groove springs 18 are respectively distributed at the top and the bottom of the plow fixing plate 19, so that when the seeding encounters uneven ground, the jolt of the seeder is reduced, the effective shock absorption is realized, the effect of making the seeding process more stable is achieved, one end of the plow groove spring 18 far away from the plow groove 16 is fixedly connected with the plow fixing plate 19, the surface of the plow fixing plate 19 is fixedly connected with the plow 20, the surface of the plow 20 is fixedly connected with the synchronizing rod 21, one end of the synchronizing rod 21 far away from the plow 20 is fixedly connected with the bottom of the seeding box 15, the self-positioning groove 10 is arranged on the surface of the fertilizer box 1, the surface of the self-positioning groove 10 is connected with a first fixed baffle 11, the surface of the self-positioning groove 10 is connected with a self-positioning spring 12, the self-positioning spring 12 is connected with the surface of a box body fixed plate 13, the box body fixed plate 13 is connected with a box body connecting plate 14, the box body connecting plate 14 is connected with a seeding box body 15, the surface of a plough groove 16 is connected with a second fixed baffle 17, the surface of the plough groove 16 is connected with a plough groove spring 18, the plough groove spring 18 is connected with a plough fixed plate 19, the plough fixed plate 19 is connected with a plough 20, the plough 20 is connected with the seeding box body 15 through a synchronizing rod 21, when the bottom surfaces with different heights are met, the plough 20 and the box body fixed plate 13 can move up and down through the self-positioning groove 10 and the plough groove 16, the current heights of the plough 20 and, the effect that the seeder can guarantee the corn seeding distance to be consistent by self-positioning height is achieved, the surface of the seeding box body 15 is provided with the seeding holes 22, the inner wall of the seeding holes 22 is fixedly connected with the seeding pipe 23, the inner wall of the seeding pipe 23 is funnel-shaped with wide top and narrow bottom, so that the corn seeds can fall at a constant speed, the interior of the seeding box body 15 is provided with the corn seed box 24, the top surface of the corn seed box 24 is provided with the seed sending port 25, the inner wall of the corn seed box 24 is fixedly connected with the first feeding roller bracket 26, one end of the first feeding roller bracket 26, which is far away from the inner wall of the corn seed box 24, is fixedly connected with the first feeding roller 27, the surface of the first feeding roller 27 is in transmission connection with the conveyor belt 28, the surface of the conveyor belt 28 is fixedly connected with the feeding plate 29, the inner wall of the conveyor belt, the surface of the second feed roller support 31 located at the sowing box 15 near the seed discharge opening 25, so that the corn seeds can be sent out from the corn seed box 24 to the sowing hole 22, the surface of the second feeding roller bracket 31 is fixedly connected with a transmission motor 32, the top of the inner cavity of the corn seed box 24 is provided with a seed inlet 33, the top of the seed inlet 33 is fixedly connected with a seed inlet funnel 34, the bottom surface of the inner cavity of the corn seed box 24 is an inclined plane which is inclined from the seed inlet 25 to the first feeding roller bracket 26, make the maize can glide to first feeding roller 27 department, more make things convenient for the transport of maize kind, the bottom fixedly connected with of maize seed case 24 buries soil rod 35, and the bottom fixedly connected with of burying soil rod 35 buries soil board 36, and the fixed surface of fertilizer case 1 is connected with case wheel fixed plate 37, and bearing and case wheel pole 38 fixed connection are passed through to the surface of case wheel fixed plate 37, and the fixed surface of case wheel pole 38 is connected with case wheel 39.
The working principle is as follows: when a general suspension type self-positioning corn seeder is used, a tractor is connected with the corn seeder through a pull plate fixing bolt 3, fertilizer is put into a fertilizer box 1, then a hydraulic motor 7 is started to draw hydraulic oil from a hydraulic oil pipe 6 into a hydraulic oil tank 5, the hydraulic oil pipe 6 is contracted, a fertilizer baffle plate 8 is moved, a fertilizer outlet 4 is exposed, the fertilizer falls along with the fertilizer, a transmission motor 32 is started, a second feeding roller 30 rotates to drive a conveyor belt 28 to move, a feeding plate 29 on the conveyor belt 28 pockets a proper amount of corn and conveys the corn to a sowing hole 22, the corn falls from a sowing pipe 23, then the tractor is started to move the seeder, a plough 20 ploughs the ground out of a groove, the fertilizer and seeds fall into the groove, a soil embedding plate 36 buries the soil later and is pressed by a box wheel 39, when the ground is uneven, the box wheel 39 and the fertilizer box 1 bump up and down, the box body fixing plate 13 and the plow fixing plate 19 in the self-positioning groove 10 and the plow groove 16 drive the seeding box body 15 and the plow 20 in the self-positioning groove 10 to keep the current position unchanged under the action of gravity of the ground center, and the effect that the seeding machine can self-position the height to ensure the corn seeding distance to be consistent is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a general floated self-align corn drill, includes fertilizer can (1), its characterized in that: the fertilizer box comprises a fertilizer box (1), a seeder pull plate (2) is fixedly connected to the back of the fertilizer box (1), a pull plate fixing bolt (3) is fixedly connected to the top surface of the seeder pull plate (2), a fertilizer outlet (4) is formed in the bottom of an inner cavity of the fertilizer box (1), a hydraulic oil tank (5) is fixedly connected to the bottom of the fertilizer box (1), a hydraulic oil pipe (6) is fixedly connected to the surface of the hydraulic oil tank (5), a hydraulic motor (7) is fixedly connected to the surface of the hydraulic oil pipe (6), a fertilizer baffle (8) is fixedly connected to the surface of the hydraulic oil pipe (6), a hydraulic oil pipe baffle (9) is fixedly connected to the bottom of the fertilizer box (1), a self-positioning groove (10) is formed in one side of the fertilizer box (1), a first fixing baffle (11) is fixedly connected to the surface of the self-positioning groove (10), and a self-, the self-positioning device is characterized in that one end, far away from the self-positioning groove (10), of the self-positioning spring (12) is fixedly connected with a box body fixing plate (13), the surface of the box body fixing plate (13) is fixedly connected with a box body connecting plate (14), one end, far away from the box body fixing plate (13), of the box body connecting plate (14) is fixedly connected with a seeding box body (15), the other side of the fertilizer box (1) is provided with a plough groove (16), the surface of the plough groove (16) is fixedly connected with a second fixing baffle plate (17), the surface of the plough groove (16) is movably connected with a plough groove spring (18), one end, far away from the plough groove (16), of the plough groove spring (18) is fixedly connected with a plough fixing plate (19), the surface of the plough fixing plate (19) is fixedly connected with a plough (20), the surface of the plough (20) is fixedly connected with a synchronizing rod (21), one end, far away from the plough (20), of, the corn seed sowing machine is characterized in that a sowing hole (22) is formed in the surface of the sowing box body (15), a sowing pipe (23) is fixedly connected to the inner wall of the sowing hole (22), a corn seed box (24) is arranged inside the sowing box body (15), a seed feeding port (25) is formed in the top surface of the corn seed box (24), a first feeding roller support (26) is fixedly connected to the inner wall of the corn seed box (24), a first feeding roller (27) is fixedly connected to one end, away from the inner wall of the corn seed box (24), of the first feeding roller support (26), a conveying belt (28) is connected to the surface of the first feeding roller (27) in a transmission manner, a feeding plate (29) is fixedly connected to the surface of the conveying belt (28), a second feeding roller (30) is connected to the inner wall, away from the first feeding roller (27), of the conveying belt (28), and a second feeding roller support (31), the fixed surface of second pay-off roller support (31) is connected with drive motor (32), kind of a mouthful (33) has been seted up at the inner chamber top of maize seed case (24), the top fixedly connected with of kind of a mouthful (33) is planted funnel (34), the bottom fixedly connected with of maize seed case (24) buries native pole (35), the bottom fixedly connected with of burying native pole (35) buries native board (36), the fixed surface of fertilizer case (1) is connected with case wheel fixed plate (37), the surface of case wheel fixed plate (37) passes through bearing and case wheel pole (38) fixed connection, the fixed surface of case wheel pole (38) is connected with case wheel (39).
2. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the hydraulic oil pipe baffle (9) is positioned at the bottom of the fertilizer box (1) and close to the fertilizer outlet (4).
3. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the surface of the box body fixing plate (13) is fixedly connected with a box body fixing block (40), and the surface of the plough fixing plate (19) is fixedly connected with a plough fixing block (41).
4. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the number of the self-positioning springs (12) is two, and the two self-positioning springs (12) are respectively distributed at the top and the bottom of the box body fixing plate (13).
5. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the number of the plough trough springs (18) is two, and the two plough trough springs (18) are respectively distributed at the top and the bottom of the plough fixing plate (19).
6. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the inner wall of the seeding pipe (23) is funnel-shaped with a wide upper part and a narrow lower part.
7. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the bottom surface of the inner cavity of the corn seed box (24) is an inclined plane which is inclined from the seed feeding port (25) to the first feeding roller bracket (26).
8. The universal self-positioning suspended corn planter as claimed in claim 1, wherein: the second feeding roller bracket (31) is positioned on the surface of the sowing box body (15) close to the seed feeding port (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624924.7A CN108934232B (en) | 2018-06-17 | 2018-06-17 | Universal suspension type self-positioning corn seeder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624924.7A CN108934232B (en) | 2018-06-17 | 2018-06-17 | Universal suspension type self-positioning corn seeder |
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| CN108934232A CN108934232A (en) | 2018-12-07 |
| CN108934232B true CN108934232B (en) | 2021-06-18 |
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| CN201810624924.7A Active CN108934232B (en) | 2018-06-17 | 2018-06-17 | Universal suspension type self-positioning corn seeder |
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| CN110521344A (en) * | 2019-08-12 | 2019-12-03 | 蒋宝华 | A kind of water cave live streaming mounted spreader of rice |
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| CN203748219U (en) * | 2014-04-07 | 2014-08-06 | 王梅忠 | Adjustable four-connecting-rod surrounded suspension seeding device |
| KR101746902B1 (en) * | 2014-09-22 | 2017-06-15 | 동양물산기업 주식회사 | Attachment assembly for tractor including peanut seeder |
| BR102015008244A2 (en) * | 2015-04-13 | 2018-04-10 | Cnh Ind Latin America Ltda | suspension set and kit for a farm implement |
| CN204887940U (en) * | 2015-08-18 | 2015-12-23 | 张云翔 | Floating fertilizing and seeding all -in -one |
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Effective date of registration: 20211223 Address after: 062550 gexinzhuang village, yanlunbao Township, Renqiu City, Cangzhou City, Hebei Province Patentee after: Hebei Zhengrong Agricultural Machinery Co.,Ltd. Address before: 233500 north of Weisan road and east of Jingliu Road, South District, Mengcheng Economic Development Zone, Bozhou City, Anhui Province Patentee before: MENGCHENG COUNTY YUTIAN MACHINERY CO.,LTD. |