CN106612785B - Combined hole type seed sowing device with adjustable sowing quantity - Google Patents
Combined hole type seed sowing device with adjustable sowing quantity Download PDFInfo
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- CN106612785B CN106612785B CN201611093988.6A CN201611093988A CN106612785B CN 106612785 B CN106612785 B CN 106612785B CN 201611093988 A CN201611093988 A CN 201611093988A CN 106612785 B CN106612785 B CN 106612785B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
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Abstract
The invention discloses a combined pit-hole type seed sowing device with adjustable sowing quantity, which comprises a front shell with a seed inlet, a rear shell with a seed inlet, an outer seed sowing disc, an inner seed sowing disc, an outer grooved wheel and a square shaft. Because the seed discharging outer disc is connected to the seed discharging inner disc through the second bolts, when the seeding amount is adjusted, the sizes of all combined holes can be adjusted simultaneously only by unscrewing the four second bolts and rotating the seed discharging outer disc to a required scale, the seed discharging outer disc and the seed discharging inner disc do not need to be replaced or the size of each hole needs to be adjusted one by one, the operation is simple and convenient, the work is reliable, and the stepless adjustment of the seeding amount can be realized; the seed amount in the seed filling chamber can be controlled through the outer grooved wheel so as to reduce the miss seeding caused by the interaction between the seeds in the process of filling the seeds into the combined type hole; when ellipsoidal seeds are sowed, the state that the seeds are filled into the inner-nest metering holes can be improved, and only rolling friction exists between the seeds and the rear shell in the process that the inner-nest metering holes rotate along with the inner seed sowing disc and the outer seed sowing disc, so that the seed injury rate is reduced.
Description
Technical Field
The invention belongs to the field of agricultural seeding machinery, and particularly relates to a combined pit-hole type seed sowing device with adjustable sowing quantity.
Background
Precision seeding is a necessary trend in the development of modern planting industry, and has the advantages of saving seeds and labor, improving the yield and quality of crops and the like. The primary factor in achieving precision seeding depends on the performance of the seed meter.
The precision seeding apparatus can be divided into mechanical type and pneumatic type according to the working principle. At present, a pneumatic seed sowing device is widely adopted on foreign precision sowing machines, has strong applicability, good universality and low requirement on the outline dimension of seeds, but has high requirement on air chamber sealing, complex structure, high price, easy abrasion, inconvenient use and maintenance and is not suitable for small-area farming modes in China. The mechanical seed sowing device has the problems of strict requirement on seed size, high seed damage rate and the like, but has the advantages of simple structure, low manufacturing cost, convenience in use and maintenance, reliability in work and the like, and still occupies a certain proportion in practical application.
Due to the difference of natural conditions, varieties and seed quality in different areas, the requirements for the seeding quantity of the seeds are also greatly different. When the seeding quantity of the traditional inside seed filling type seeding apparatus is adjusted, the seeding disc is replaced or the sizes of the holes are adjusted one by one, the operation is complex, the sizes of all the holes after adjustment can not be ensured to be consistent, and the adjustment range is small.
Disclosure of Invention
The invention aims to provide a combined cell-hole type seed sowing device with adjustable sowing quantity, which can change the sizes of all combined holes only by adjusting a seed sowing outer disc under the condition of not replacing a seed sowing inner disc and a seed sowing outer disc or adjusting the sizes of the holes one by one, thereby realizing stepless regulation of the sowing quantity, improving the seed filling state and reducing the seed injury rate.
In order to achieve the purpose, the combined cellular seed sowing device with adjustable sowing quantity comprises a front shell with a seed inlet, a rear shell with a seed inlet, a seed sowing outer disc, a seed sowing inner disc and a square shaft, wherein the front shell and the rear shell are arranged in an involutory mode and are fixedly connected through a first bolt; the first bearing seat on the front shell is in interference fit with the first bearing, the third bearing seat on the rear shell is in interference fit with the third bearing, one end of the square shaft penetrates through the first bearing and then is connected with the driving sprocket, and the other end of the square shaft penetrates through the first central hole of the seed discharging outer disc, the square through hole of the seed discharging inner disc and the third bearing in sequence and then is connected with the outer sprocket;
The middle part of the seed discharging outer disc is provided with a plurality of arc-shaped holes along the circumference, the middle part of the seed discharging inner disc is provided with a plurality of counter bores matched with the arc-shaped holes, and the seed discharging outer disc and the seed discharging inner disc are fixedly connected through a second bolt;
a plurality of uniformly distributed outer bosses are vertically arranged on the edge of the seed sowing outer disc along the circumference, and an outward convex lug extending outwards is horizontally arranged at one end part of each outer boss; a plurality of inner bosses matched with the outer bosses are vertically arranged on the edge of the seed sowing inner disc along the circumference, and an outer lug is arranged in an inner gap between every two adjacent inner bosses; an outer gap between two adjacent outer bosses, a gap between an outer lug on one outer boss of the two adjacent outer bosses and an inner boss corresponding to the other outer boss and a front shell form a combined hole, the combined hole comprises a horizontal inner nest quantifying hole and a vertical seed charging hole, and the circumferential size of the seed charging hole is gradually reduced along with the radial outward direction of the seed discharging outer disc;
the second bearing seat on the front shell is in interference fit with the second bearing, one end of the stepped shaft penetrates through the second central hole of the outer grooved wheel, the other end of the stepped shaft penetrates through the second bearing until the other end of the stepped shaft is connected with the driven sprocket, the cylindrical pin penetrating through one end of the stepped shaft is horizontally arranged in the second central hole until the two ends of the cylindrical pin are inserted into the grooves at the two ends of the second central hole, and a plurality of shaped holes are formed in the outer periphery of the outer grooved wheel.
Furthermore, the seed discharging outer disc is marked with scale marks on any outer boss by taking the center of the seed discharging outer disc as the circle center.
Further, the thickness of the outer lug is equal to that of the inner lug, and the thickness of the outer grooved wheel type hole is consistent with that of the seed filling hole.
Furthermore, the number of the arc-shaped holes on the seed sowing outer disc is four, correspondingly, the number of the counter bores on the seed sowing inner disc is also four, and the central angles corresponding to the arc-shaped holes are equal and are all 18-22 degrees.
Further, be equipped with the dog on the procapsid internal surface and protect the blank, the dog is installed and is cleaned the clear kind brush of dog of brushing the outer dish of seed metering, the one end of protecting the blank is installed and is cleaned the clear kind brush of blank of protecting of the outer dish of seed metering, the other end of protecting the blank is installed and is cleaned the clear kind brush of outer sheave.
Further, the inner convex table surface chamfer angle of each inner concave quantitative hole is formed in a ratio of 1: 10.
Furthermore, a support connected with the seeder frame is arranged on the rear shell.
Compared with the prior art, the invention has the following advantages:
1. the seed discharging outer disc is connected to the seed discharging inner disc through the bolts, when the seeding amount is adjusted, the sizes of all combined holes can be adjusted simultaneously only by loosening the four bolts and rotating the seed discharging outer disc to the required scale positions, the seed discharging outer disc and the seed discharging inner disc do not need to be replaced or the size of each hole does not need to be adjusted one by one, the operation is simple and convenient, the work is reliable, and the stepless adjustment of the seeding amount can be realized;
2. The seed amount in the seed filling chamber can be controlled through the outer grooved wheel so as to reduce the miss seeding caused by the interaction between the seeds in the process of filling the seeds into the combined type hole;
3. when ellipsoidal seeds are sown, the thickness of the outer grooved wheel type hole is equal to that of the seed filling hole and the inner nest quantifying hole, the circumferential size of the seed filling hole is gradually reduced along the radial outward direction of the seed sowing outer disc, the seed filling form of the seeds is limited, the seeds tend to enter the inner nest quantifying hole in a flat-lying rolling mode, the state that the seeds are filled into the inner nest quantifying hole is improved, and only rolling friction exists between the seeds and the rear shell in the rotation process of the inner nest quantifying hole along with the seed sowing inner disc and the seed sowing outer disc, so that the seed injury rate is reduced.
Drawings
FIG. 1 is an exploded view of the combined cell-hole seed metering device of the present invention with adjustable seeding rate;
FIG. 2 is a schematic view of the inner surface configuration of the front housing of FIG. 1;
FIG. 3 is a schematic view of the exterior surface configuration of the front housing of FIG. 1;
FIG. 4 is a schematic structural view of the rear housing of FIG. 1;
FIG. 5 is a schematic view of the structure of the outer seeding plate in FIG. 1;
FIG. 6 is a schematic view of the inner seed plate of FIG. 1;
fig. 7 is a schematic structural view of an outer sheave shown in fig. 1;
FIG. 8 is a left side cross-sectional view of FIG. 1;
FIG. 9 is a rear cross-sectional view of FIG. 1;
Fig. 10 is a schematic top cross-sectional view of fig. 1.
The components in the figures are numbered as follows: the seed sowing inner disk 1, the seed sowing outer disk 2, the rear shell 3, the seed protection plate seed cleaning brush 4, a third bolt 5, a shaped hole 7, a gasket 6, an outer grooved wheel seed cleaning brush 8, a stop block seed cleaning brush 9, a screw 10, a countersunk head screw 11, an outer convex lug 12, an outer chain wheel 13, a nut 14, an inner gap 15, a third bearing end cover 16, a second bolt 17, a first bolt 18, an outer gap 19, a combined shaped hole 20, a front shell 21, a gap 22, an inner pit quantitative hole 23, a square shaft 24, a first bearing end cover 25, a third bearing 26, a cylindrical pin 27, an outer grooved wheel 28, a second bearing 29, a seed filling hole 30, a driven chain wheel 31, a key 32, a stepped shaft 33, a second bearing end cover 34, an inner convex table surface 35, a driving chain wheel 36, a first bearing 37, a stop block 38, a first through hole 39, a seed protection plate 40, a first bearing 41, a seed inlet 42, a second bearing 43, a seed feeding port 44, a support 45, a second central hole 46, The bearing comprises a third bearing seat 47, a second through hole 48, an arc-shaped hole 49, an outer boss 50, a first central hole 51, a counter bore 52, an inner boss 53, a square through hole 54 and a groove 55.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The combined cellular seed sowing device with adjustable sowing quantity as shown in figure 1 comprises a front shell 21 with a seed inlet 42, a rear shell 3 with a seed inlet 44, a seed sowing outer disk 2, a seed sowing inner disk 1, an outer grooved wheel 28 and a square shaft 24. Referring to fig. 2, 3 and 4, a plurality of first through holes 39 are circumferentially formed in the edge of the front housing 21, second through holes 48 matched with the first through holes 39 are circumferentially formed in the edge of the rear housing 3, and the front housing 21 and the rear housing 3 are oppositely arranged and fixedly connected through first bolts 18; referring to fig. 5 and 6, a plurality of arc-shaped holes 49 are formed in the middle of the outer seeding plate 2 along the circumference, a plurality of counter bores 52 matched with the arc-shaped holes 49 are formed in the middle of the inner seeding plate 1, and the outer seeding plate 2 and the inner seeding plate 1 are fixedly connected through second bolts 17 and then are located in a space formed by the front shell 21 and the rear shell 3; in addition, the number of the arc-shaped holes 49 on the seed discharging outer disk 2 is four, correspondingly, the number of the counter bores 52 on the seed discharging inner disk 1 is also four, and the central angles corresponding to the arc-shaped holes 49 are equal and are all 18-22 degrees (preferably 20 degrees), so that the seed discharging outer disk 2 can rotate around the seed discharging inner disk 1 along the circumferential direction.
As shown in fig. 8, 9 and 10, the first bearing seat 41 and the second bearing seat 43 on the front housing 21 are in interference fit with outer races of the first bearing 37 and the second bearing 29 (i.e., the first bearing seat 41 is in interference fit with an outer race of the first bearing 37, and the second bearing seat 43 is in interference fit with an outer race of the second bearing 29), respectively, and the third bearing seat 47 on the rear housing 3 is in interference fit with an outer race of the third bearing 26;
One end of the square shaft 24 passes through the first bearing 37 and then is connected with the driving sprocket 36, the driving sprocket 36 is positioned and connected with the square shaft 24 through the key 32, the other end of the square shaft 24 sequentially passes through the first central hole 51 of the seed sowing outer disc 2, the square through hole 54 of the seed sowing inner disc 1 and the third bearing 26 and then is connected with the outer sprocket 13 through the nut 14, and the gasket 6 is lined between the outer sprocket 13 and the end surface of the rear shell 3; the third bearing end cover 16 is fixed on the third bearing seat 47 by a countersunk screw 11, and the first bearing end cover 25 is fixed on the first bearing seat 41 by a countersunk screw 11;
as shown in fig. 7, one end of the stepped shaft 33 passes through the second central hole 46 of the outer sheave 28, the second bearing end cap 34 is fixed on the second bearing seat 43 by the countersunk screw 11, the other end of the stepped shaft 33 passes through the second bearing 29 until the other end of the stepped shaft 33 is connected to the driven sprocket 31, and the driven sprocket 31 is in positioning connection with the stepped shaft 33 by the key 32, and in addition, the cylindrical pin 27 penetrating one end of the stepped shaft 33 is laid on the second central hole 46 until both ends of the cylindrical pin 27 are inserted into the grooves 55 at both ends of the second central hole 46, so that the outer sheave 28 rotates circumferentially with the stepped shaft 33 by the cylindrical pin 27, and the outer periphery of the outer sheave 28 is provided with a plurality of shaped holes 7;
As shown in fig. 5, 6 and 8 again, a plurality of uniformly distributed outer bosses 50 are vertically arranged on the edge of the seed-metering outer disc 2 along the circumference, and an outer lug 12 extending outwards is horizontally arranged at one end of each outer boss 50; a plurality of inner bosses 53 matched with the outer bosses 50 are vertically arranged on the edge of the inner seeding plate 1 along the circumference, an outer lug 12 is arranged in an inner gap 15 between two adjacent inner bosses 53, and the thickness of the outer lug 12 is equal to that of the inner bosses 53; each outer lug 12 is correspondingly arranged on the inner gap 15, the outer gap 19 of two adjacent outer bosses 50, the gap 22 between the outer lug 12 on one outer boss 50 of the two adjacent outer bosses 50 and the inner boss 53 corresponding to the other outer boss 50 and the front shell 21 form a combined type hole 20, the combined type hole 20 comprises a horizontal inner nest quantitative hole 23 and a vertical seed charging hole 30, the chamfer 1:10 of the inner boss 35 forming each inner nest quantitative hole 23 is convenient for smooth seed charging, the thickness of the outer sheave 28 type hole 7 is consistent with that of the seed charging hole sheave 30, and each type hole 7 of the outer sheave 28 can only contain one seed; because the thickness (along the axial direction) of the outer lug 12 is equal to the thickness (along the axial direction) of the inner lug 53, the thicknesses of the inner nest dosing hole 23 and the seed charging hole 30 are also consistent, and the circumferential dimension of the seed charging hole 30 is gradually reduced along the radial outward (along the radial direction outward) direction of the seed sowing outer disc 2; in addition, the seed-metering outer disk 2 is marked with a scale mark (not shown in the figure) on any outer boss 50 by taking the center of the seed-metering outer disk 2 as the center of a circle, so as to facilitate the adjustment of the circumferential dimension (along the circumferential direction) of the inner nest metering hole 23 of the combined hole 20.
As shown in fig. 2 and 8 again, a stopper 38 and a seed protection plate 40 are arranged on the inner surface of the front housing 21, the stopper 38 is provided with a stopper seed cleaning brush 9 for cleaning and brushing the seed sowing outer disc 2 through a screw 10, one end of the seed protection plate 40 is clamped with a seed protection plate seed cleaning brush 4 for cleaning and brushing the seed sowing outer disc 2, and the other end of the seed protection plate 40 is provided with an outer sheave seed cleaning brush 8 for cleaning and brushing the outer sheave 28 through a third bolt 5, a gasket 6 and a nut 14; and, a support 45 connected to the frame of the sowing machine is provided on the rear housing 3.
When the outer chain wheel 13 drives the square shaft 24 to rotate, the seed sowing outer disc 2 and the seed sowing inner disc 1 start to rotate together, meanwhile, the key 32 drives the driving chain wheel 36 to rotate, and then the chain transmission drives the driven chain wheel 31 to rotate, so that the stepped shaft 33 starts to rotate, and the cylindrical pin 27 penetrates through the stepped shaft 33, so that the outer grooved wheel 28 starts to rotate.
The seeds enter the shaped hole 7 of the outer grooved wheel 28 from the seed inlet 42 and rotate along with the outer grooved wheel 28, when the seeds pass through the outer grooved wheel seed cleaning brush 8 on the seed protection plate 40, redundant seeds in the shaped hole 7 are brushed out of the shaped hole 7 and fall back to the seed filling area, the seeds in the shaped hole 7 enter the seed protection area along with the rotation of the outer grooved wheel 28, after passing through the seed protection area, the seeds fall into the combined shaped hole 20 formed by the outer seeding plate 2 and the inner seeding plate 1, then rotate along with the outer seeding plate 2 and the inner seeding plate 1 and are cleaned by gravity, then enter the seed protection area, after rotating for a certain angle, enter the seed feeding area, and are discharged through the seed feeding port 44 by gravity and centrifugal force, so that the seed feeding process is completed.
Because the seed discharging outer disc 2 is connected to the seed discharging inner disc 1 through the second bolts 17, when the seeding amount is adjusted, the sizes of all the combined holes 20 can be adjusted simultaneously only by unscrewing the four second bolts 17, rotating the seed discharging outer disc 2 to the required scale positions and then screwing the second bolts 17, the seed discharging outer disc 2 and the seed discharging inner disc 1 do not need to be replaced, or the sizes of all the combined holes are adjusted one by one, the operation is simple and convenient, the operation is reliable, and the stepless adjustment of the seeding amount can be realized.
In addition, the seed amount in the seed filling chamber can be controlled through the outer grooved wheel 28, so that the missing seeding caused by the interaction among the seeds in the process of filling the seeds into the combined holes is reduced; secondly, when ellipsoidal seeds are sown, the thickness of the outer grooved wheel 28-shaped hole 7 is equal to the thickness of the seed filling hole 30 and the inner nest metering hole 23, the circumferential size of the seed filling hole 30 is gradually reduced along the radial outward direction of the seed sowing outer disc 2, the seed filling form of the seeds is limited, the seeds tend to enter the inner nest metering hole in a flat rolling mode, the state that the seeds are filled into the inner nest metering hole is improved, and only rolling friction exists between the inner nest metering hole and the rear shell in the rotation process of the inner nest metering hole along with the seed sowing inner disc and the seed sowing outer disc, so that the seed injury rate is reduced.
Claims (4)
1. A combined pit hole type seed sowing device with adjustable sowing quantity comprises a front shell (21) with a seed inlet (42), a rear shell (3) with a seed inlet (44), an outer seed sowing disc (2), an inner seed sowing disc (1) and a square shaft (24), wherein the front shell (21) and the rear shell (3) are arranged in an involutory mode and are fixedly connected through a first bolt (18), and the outer seed sowing disc (2) and the inner seed sowing disc (1) are both positioned in a space formed by the front shell (21) and the rear shell (3); a first bearing seat (41) on the front shell (21) is in interference fit with a first bearing (37), a third bearing seat (47) on the rear shell (3) is in interference fit with a third bearing (26), one end of the square shaft (24) penetrates through the first bearing (37) and then is connected with the driving sprocket (36), and the other end of the square shaft (24) penetrates through a first central hole (51) of the seed sowing outer disc (2), a square through hole (54) of the seed sowing inner disc (1) and the third bearing (26) in sequence and then is connected with the outer sprocket (13); the method is characterized in that:
A plurality of arc-shaped holes (49) are formed in the middle of the outer seeding plate (2) along the circumference, a plurality of counter bores (52) matched with the arc-shaped holes (49) are formed in the middle of the inner seeding plate (1), and the outer seeding plate (2) is fixedly connected with the inner seeding plate (1) through second bolts (17);
a plurality of uniformly distributed outer bosses (50) are vertically arranged on the edge of the seed sowing outer disc (2) along the circumference, and an outward convex lug (12) extending outwards is horizontally arranged at one end part of each outer boss (50); a plurality of inner bosses (53) matched with the outer bosses (50) are vertically arranged on the edge of the inner seeding plate (1) along the circumference, and an outer lug (12) is arranged in an inner gap (15) between every two adjacent inner bosses (53); an outer gap (19) between two adjacent outer bosses (50), a gap (22) between an outer lug (12) on one outer boss (50) of the two adjacent outer bosses (50) and an inner boss (53) corresponding to the other outer boss (50) and a front shell (21) form a combined hole (20), the combined hole (20) comprises a horizontal inner nest quantitative hole (23) and a vertical seed charging hole (30), and the circumferential size of the seed charging hole (30) is gradually reduced along with the radial outward direction of the seed sowing outer disc (2);
a second bearing seat (43) on the front shell (21) is in interference fit with a second bearing (29), one end of a stepped shaft (33) penetrates through a second central hole (46) of the outer sheave (28), the other end of the stepped shaft (33) penetrates through the second bearing (29) until the other end of the stepped shaft (33) is connected with the driven sprocket (31), and a cylindrical pin (27) penetrating through one end of the stepped shaft (33) is horizontally arranged in the second central hole (46) until two ends of the cylindrical pin (27) are inserted into grooves (55) at two ends of the second central hole (46), and the outer periphery of the outer sheave (28) is provided with a plurality of shaped holes (7);
Scale marks are marked on any outer boss (50) on the seed discharging outer disc (2) by taking the center of the seed discharging outer disc (2) as the circle center; the thickness of the outer lug (12) is equal to that of the inner lug (53), and the thickness of the outer grooved wheel (28) type hole (7) is consistent with that of the seed filling hole (30); the seed metering outer disc (2) is provided with four arc-shaped holes (49), correspondingly, the seed metering inner disc (1) is provided with four counter bores (52), and the central angles corresponding to the arc-shaped holes (49) are equal and are all 18-22 degrees.
2. The adjustable seeding combination cellular seed metering device of claim 1, wherein: be equipped with dog (38) and seed protection board (40) on procapsid (21) internal surface, dog (38) are installed and are cleaned the dog of outer dish of seed metering (2) and clear kind of brush (9), seed protection board clear kind of brush (4) of cleaning outer dish of seed metering (2) are installed to the one end of protecting seed board (40), the other end of protecting seed board (40) is installed and is cleaned outer sheave clear kind of brush (8) of outer sheave (28).
3. The adjustable seeding combination cellular seed metering device of claim 1, wherein: the inner convex table surface (35) forming each inner nest quantifying hole (23) is chamfered 1: 10.
4. The adjustable seeding combination cellular seed metering device of claim 1, wherein: and a support (45) connected with the seeder frame is arranged on the rear shell (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093988.6A CN106612785B (en) | 2016-12-02 | 2016-12-02 | Combined hole type seed sowing device with adjustable sowing quantity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093988.6A CN106612785B (en) | 2016-12-02 | 2016-12-02 | Combined hole type seed sowing device with adjustable sowing quantity |
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| Publication Number | Publication Date |
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| CN106612785A CN106612785A (en) | 2017-05-10 |
| CN106612785B true CN106612785B (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611093988.6A Active CN106612785B (en) | 2016-12-02 | 2016-12-02 | Combined hole type seed sowing device with adjustable sowing quantity |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700063111A1 (en) * | 2017-06-08 | 2018-12-08 | Matermacc S P A | Distributor of material for agricultural machinery |
| CN110199633B (en) * | 2019-05-21 | 2021-07-09 | 华中农业大学 | Internal-charging air-suction type high-speed precision seed sowing device |
| CN111869377B (en) * | 2020-07-15 | 2024-04-26 | 石河子大学 | Duplex side-charging precision seed metering device |
| CN112042334B (en) * | 2020-09-17 | 2021-09-07 | 浙江奕乌侬食品有限公司 | Seed metering dish device based on three-dimensional printing technology |
| CN113287395B (en) * | 2021-06-08 | 2022-06-24 | 安徽农业大学 | Inclined cavity type rice precision hole sowing seed sowing device |
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| CN105594350A (en) * | 2016-01-14 | 2016-05-25 | 华南农业大学 | Seeding rate adjusting device for seed metering device |
| CN206226981U (en) * | 2016-12-02 | 2017-06-09 | 华中农业大学 | The adjustable combination socket bore formula feed mechanism for seed of one kind amount of broadcasting |
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|---|---|---|---|---|
| CN2327159Y (en) * | 1998-03-03 | 1999-07-07 | 牛青山 | Adjustable push-pull seed distributor |
| CN2320003Y (en) * | 1998-03-20 | 1999-05-26 | 赵记州 | Seed number adjustable combined seeding and fertilizing implement |
| CN102668785A (en) * | 2012-06-12 | 2012-09-19 | 山东理工大学 | Peanut sowing seed-metering device with adjustable particle size |
| CN104255139A (en) * | 2014-08-29 | 2015-01-07 | 吉林大学 | Type hole volume variable type precision seed metering device |
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| CN206226981U (en) * | 2016-12-02 | 2017-06-09 | 华中农业大学 | The adjustable combination socket bore formula feed mechanism for seed of one kind amount of broadcasting |
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| CN106612785A (en) | 2017-05-10 |
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