CN115250759A - Concave plate sieve blockage cleaning device of combine harvester, threshing roller assembly and threshing system - Google Patents
Concave plate sieve blockage cleaning device of combine harvester, threshing roller assembly and threshing system Download PDFInfo
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- CN115250759A CN115250759A CN202211070502.2A CN202211070502A CN115250759A CN 115250759 A CN115250759 A CN 115250759A CN 202211070502 A CN202211070502 A CN 202211070502A CN 115250759 A CN115250759 A CN 115250759A
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- threshing
- threshing cylinder
- steel wire
- spring steel
- concave
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- 238000004140 cleaning Methods 0.000 title claims abstract description 14
- 229910000639 Spring steel Inorganic materials 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 230000002457 bidirectional effect Effects 0.000 claims description 26
- 230000007704 transition Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 14
- 239000011148 porous material Substances 0.000 abstract description 8
- 235000013339 cereals Nutrition 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 240000006162 Chenopodium quinoa Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 244000062793 Sorghum vulgare Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000019713 millet Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/18—Threshing devices
- A01F12/184—Cleaning means
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/18—Threshing devices
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/18—Threshing devices
- A01F12/22—Threshing cylinders with teeth
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Threshing Machine Elements (AREA)
Abstract
The invention discloses a concave sieve blockage removing device, a threshing roller component and a threshing system of a combine harvester, wherein the concave sieve blockage removing device rotates along with a threshing roller of the combine harvester; the concave plate screen blockage cleaning device comprises a spring steel wire and a reciprocating mechanism; the main body part of the spring steel wire extends along the radial direction of the threshing cylinder; the reciprocating mechanism makes the spring steel wire perform reciprocating translation along the axial direction of the threshing cylinder. According to the concave sieve blockage cleaning device, the threshing cylinder assembly and the threshing system of the combine harvester, the concave sieve blockage cleaning device is arranged on the separating cylinder, the spring steel wire is driven by the reciprocating mechanism to reciprocate relative to the threshing cylinder when the threshing cylinder rotates, the spring steel wire can move in a spiral line, and after the threshing cylinder moves for a plurality of periods, the spring steel wire can traverse each sieve pore in the reciprocating movement stroke, so that the spring steel wire does not need to be densely distributed, and the threshing operation of materials is not influenced.
Description
Technical Field
The invention relates to the field of agricultural machinery, in particular to a concave plate sieve blockage cleaning device, a threshing roller component and a threshing system of a combine harvester.
Background
In the working process of the threshing and cleaning system of the combine harvester, partial crushed materials are easy to adhere to a concave plate sieve of the threshing system under the actions of kneading, hitting and the like, especially for the materials with higher water content (the water content of stems can reach about 60% usually when rape is harvested) or small-grain crops such as rape, millet, quinoa and the like, the crushed materials such as the straws with high water content are easy to adhere because the grains are smaller and the screen mesh spacing of the concave plate sieve is smaller, and when the fine crushed materials are adhered to the surface of grid bars of the concave plate sieve, if the crushed materials cannot be removed in time, the spacing distance between the grid bars of the concave plate sieve is gradually reduced, the passing capacity of the concave plate grid is influenced, the grain separation is difficult, and the harvest loss rate is high.
In production, materials adhered to the concave sieve are usually cleaned manually, but because the materials are cleaned by intermittent shutdown, particularly for a threshing system which is not easy to open the concave sieve, the cleaning of the adhered materials is troublesome and labor-consuming. On one hand, the use efficiency of the machine tool is influenced, and on the other hand, the separation capacity of the concave plate screen is also reduced. In the prior art, a scheme that a blockage clearing element is arranged at a fixed position of a concave sieve to clear the blockage of the concave sieve or a scheme that the blockage clearing element acting on the concave sieve is arranged on a threshing cylinder is provided.
Therefore, there is a need to improve the defects and shortcomings of the prior art, and provide a threshing system which occupies less space, can remove the adhered materials in all the areas of the concave sieve, improves the separation capacity of the concave sieve, and particularly reduces the threshing loss obviously for small grain materials and small concave grid intervals.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the concave plate sieve blockage removing device, the threshing roller component and the threshing system of the combine harvester, which have the advantages of small occupied space, capability of removing the adhered materials in all the areas of the concave plate sieve and strong blockage removing capability.
The technical scheme is as follows: in order to achieve the purpose, the concave plate sieve blockage removing device of the combine harvester rotates along with a threshing cylinder of the combine harvester; the concave plate screen blockage cleaning device comprises a spring steel wire and a reciprocating mechanism; the main body part of the spring steel wire extends along the radial direction of the threshing cylinder; the reciprocating mechanism makes the spring steel wire perform reciprocating translation along the axial direction of the threshing cylinder.
Furthermore, the reciprocating mechanism comprises a bidirectional screw shaft, a reversing sleeve, a reversing block and a limiting guide piece;
the bidirectional spiral shaft is provided with a guide groove, the guide groove comprises a forward spiral groove and a reverse spiral groove, and two ends of the forward spiral groove are respectively communicated with two ends of the reverse spiral groove through transition sliding chutes;
the reversing sleeve is sleeved on the bidirectional spiral shaft in a sliding manner; the reversing block is arranged in the reversing sleeve and can rotate in the reversing sleeve, and the end part of the reversing block is always placed in the guide groove; at two ends of the guide groove, the reversing block rotates relative to the reversing sleeve, and the end part of the reversing block moves along the transition sliding groove to switch between two spiral grooves;
the spring steel wire is arranged on the reversing sleeve, and the limiting guide piece enables the spring steel wire to move linearly relative to the threshing cylinder.
Furthermore, the spring steel wire is connected with the reversing sleeve through a connecting rod; the limiting guide piece is provided with a guide groove extending along the axial direction of the threshing cylinder, and the connecting rod is arranged in the guide groove.
Further, the tail end of the spring steel wire is provided with a U-shaped part, and the U-shaped part is fixed on the connecting rod through a screw.
Furthermore, the reversing sleeve is provided with a transverse through hole for the bidirectional screw shaft to pass through and a vertical hole for the reversing block to be placed in; sliding sleeves and snap springs for limiting the sliding sleeves are respectively arranged at two ends of the transverse through hole.
Further, the end of the reversing block is provided with a circular arc-shaped notch.
The threshing cylinder component comprises a threshing cylinder, and the threshing cylinder comprises a rotating shaft and a plurality of threshing toothed bars which are arranged around the rotating shaft in a circumferential array manner; a plurality of radial plates are dispersedly arranged on the axial direction of the rotating shaft; the concave plate sieve blockage cleaning device is arranged on the threshing cylinder;
the bidirectional screw shaft is rotatably mounted relative to the wheel disc, and the limiting guide piece is fixed between the adjacent wheel discs;
the threshing cylinder is also provided with a driving mechanism for driving the bidirectional screw shaft to rotate.
Further, the driving mechanism comprises a central gear sleeved on the rotating shaft and a spiral shaft driving gear fixed on the bidirectional spiral shaft;
the central gear is fixedly arranged relative to a frame of the combine harvester;
the screw shaft driving gear is meshed with the central gear.
Furthermore, a plurality of groups of concave plate screen blockage removing devices are distributed in the circumferential direction of the threshing cylinder, and the concave plate screen blockage removing devices of all the groups are distributed in a circumferential array manner.
The threshing system comprises the threshing roller component and a concave screen; the threshing roller component is arranged in the concave sieve; when the spring steel wire is completely unfolded, the end part of the spring steel wire can penetrate through the sieve holes on the concave plate sieve and extend out of the sieve holes.
Has the advantages that: according to the concave sieve blockage removing device, the threshing cylinder assembly and the threshing system of the combine harvester, the concave sieve blockage removing device is arranged on the separating cylinder, the spring steel wire is driven by the reciprocating mechanism to reciprocate relative to the threshing cylinder when the threshing cylinder rotates, so that the spring steel wire can make spiral motion, and can traverse each sieve pore in the reciprocating motion stroke after the threshing cylinder moves for a plurality of cycles, so that the spring steel wire does not need to be densely distributed, and the threshing operation of materials is not influenced.
Drawings
Fig. 1 is a perspective view of a threshing cylinder assembly;
fig. 2 is a front view of a threshing cylinder assembly;
fig. 3 is a structural view of the threshing cylinder assembly with the threshing rack hidden;
fig. 4 is a side view of a threshing cylinder assembly;
fig. 5 is a block diagram of a threshing system;
FIG. 6 is an enlarged structural view of portion A in FIG. 5;
FIG. 7 is a structural view of the concave plate screen block cleaning device;
FIG. 8 is a view showing a combination structure of the reversing cover and the spring wire;
FIG. 9 is an internal structural view of the reversing sleeve;
fig. 10 is a structural view of the commutation block.
In the figure: a-threshing cylinder assembly; 1-a threshing cylinder; 11-a rotating shaft; 12-threshing toothed bar; 13-a web; 2-a concave plate screen blockage cleaning device; 21-spring steel wire; 21 a-U-shaped portion; 22-a bidirectional helical shaft; 22 a-forward spiral groove; 22 b-reverse helical groove; 23-a reversing sleeve; 23 a-transverse through hole; 23 b-vertical holes; 24-a commutation block; 24 a-a notch; 25-a limit guide; 26-a connecting rod; 27-a sliding sleeve; 28-clamp spring; 29-a bearing seat; 3-a drive mechanism; 31-a sun gear; 32-screw shaft drive gear; 4-concave plate sieve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The concave plate sieve blockage removing device 2 is arranged on a threshing cylinder 1 of a combine harvester and rotates along with the threshing cylinder 1 of the combine harvester; as shown in fig. 1-2, a threshing cylinder assembly a is composed of a threshing cylinder 1 and a concave screen blockage removing device 2, wherein the threshing cylinder 1 comprises a rotating shaft 11 and a plurality of threshing toothed bars 12 arranged in a circumferential array around the rotating shaft 11; a plurality of radial plates 13 are dispersedly arranged on the axial direction of the rotating shaft 11, and the threshing toothed bar 12 is fixedly connected with the edge of each radial plate 13.
The concave plate screen blockage cleaning device 2 comprises a spring steel wire 21 and a reciprocating mechanism; the main body of the spring wire 21 extends along the radial direction of the threshing cylinder 1; the reciprocating mechanism causes the spring wire 21 to perform reciprocating translation along the axial direction of the threshing cylinder 1.
As shown in fig. 5, the threshing system of the combine harvester comprises the threshing cylinder component a and further comprises a concave sieve 4; the threshing roller component is arranged in the concave plate sieve 4; when the spring wire 21 is fully deployed, its ends can pass through the holes in the recess screen 4 and extend beyond the holes (as shown in fig. 6).
In the structure, when threshing cylinder 1 rotates, reciprocating motion mechanism makes spring steel wire 21 reciprocating motion in the direction that is on a parallel with threshing cylinder 1's axial, combined action between them makes spring steel wire 21 be the helix motion, and spring steel wire 21 returns along reverse helix along forward helix motion earlier again, circulate according to this, clear up concave plate sieve 4, after threshing cylinder 1 moves a plurality of cycle, spring steel wire 21 can traverse each sieve mesh that is in its reciprocating motion stroke on the concave plate sieve 4, so do not need intensive overall arrangement spring steel wire 21, do not influence the threshing operation of material.
The spring steel wire 21 is adopted for clearing blockage, because the spring steel wire 21 has elasticity, after the end part of the spring steel wire 21 finishes clearing blockage of a sieve pore, along with the rotation of the threshing cylinder 1, the end part of the spring steel wire 21 is contacted with the edge of the sieve pore to be bent and deformed and accumulate force in the process of moving out of the sieve pore, when the spring steel wire 21 is separated from the edge of the sieve pore, the end part of the spring steel wire 21 enters another sieve pore, and at the moment, the spring steel wire 21 is rapidly straightened to release accumulated energy, so that sundries in the sieve pore can be flicked away, and a good blockage clearing effect can be achieved.
Specifically, as shown in fig. 7, the reciprocating mechanism includes a bidirectional screw shaft 22, a reversing sleeve 23, a reversing block 24 and a limiting guide 25; the two-way screw spindle 22 is rotatably mounted relative to the web 13. The bidirectional screw shaft 22 is provided with a guide groove, the guide groove comprises a forward spiral groove 22a and a reverse spiral groove 22b, and two ends of the forward spiral groove 22a are respectively communicated with two ends of the reverse spiral groove 22b through transition sliding grooves; the reversing sleeve 23 is sleeved on the bidirectional screw shaft 22 in a sliding manner; the reversing block 24 is installed in the reversing sleeve 23 and can rotate in the reversing sleeve 23, the end of the reversing block 24 is always placed in the guide groove, at the two ends of the guide groove, the reversing block 24 rotates relative to the reversing sleeve 23, and the end of the reversing block 24 moves along the transition sliding groove to switch between two spiral grooves (namely, a forward spiral groove 22a and a reverse spiral groove 22 b); the spring wire 21 is mounted on the reversing sleeve 23, and the limiting guide 25 enables the spring wire 21 to move linearly relative to the threshing cylinder 1.
The spring steel wire 21 is connected with the reversing sleeve 23 through a connecting rod 26; the limit guide 25 has a guide groove extending in the axial direction of the threshing cylinder 1, in which the connecting rod 26 is placed. The stopper guide 25 is fixed between the adjacent webs 13.
With the above structure, when the bidirectional screw shaft 22 rotates in the fixed direction, the end of the guide 25 moves along the guide groove, and at the same time, the reversing sleeve 23 is translated in the direction parallel to the axial direction of the threshing cylinder 1 and does not rotate relative to the threshing cylinder 1 under the restriction of the guide 25. The end of the guide 25 is reciprocally switched between the forward spiral groove 22a and the reverse spiral groove 22b, so as to realize the reciprocal translation movement of the reversing sleeve 23, that is, the reciprocal translation movement of the spring steel wire 21. As shown in fig. 8, the rear end of the spring wire 21 has a U-shaped portion 21a, and the U-shaped portion 21a is fixed to the link 26 by a screw.
As shown in fig. 9, the reversing sleeve 23 has a transverse through hole 23a for the bidirectional screw shaft 22 to pass through and a vertical hole 23b for the reversing block 24 to be inserted; sliding sleeves 27 and snap springs 28 for limiting the sliding sleeves 27 are respectively mounted at two ends of the transverse through hole 23 a. In this embodiment, the sliding sleeve 27 is a nylon sleeve, so that the reversing sleeve 23 can move smoothly relative to the two-way screw shaft 22, and abrasion is reduced.
As shown in fig. 10, the end of the commutation block 24 has a notch 24a in the shape of a circular arc. With this structure, the length of the portion of the reversing block 24 to be inserted into the guide groove is long, so that the end portion of the reversing block 24 smoothly passes through the crossing position between the forward spiral groove 22a and the reverse spiral groove 22b without entering an erroneous groove.
In order to drive the bidirectional screw shafts 22 to rotate relative to the web 13, the threshing cylinder 1 is also provided with a drive mechanism 3. As shown in fig. 4, the driving mechanism 3 includes a central gear 31 sleeved on the rotating shaft 11 and a screw shaft driving gear 32 fixed on the bidirectional screw shaft 22; the central gear 31 is fixedly arranged relative to a frame of the combine harvester; the screw shaft driving gear 32 is engaged with the sun gear 31. With the structure, the central gear 31 is fixed relative to the frame, so when the threshing cylinder 1 rotates relative to the frame to perform threshing operation, the screw shaft driving gear 32 rotates along with the threshing cylinder 1, and due to the meshing relationship between the central gear 31 and the screw shaft driving gear 32, the screw shaft driving gear 32 rotates relative to the threshing cylinder 1 to further drive the bidirectional screw shaft 22 to rotate, so that the concave plate screen blockage removing device 2 can be driven to perform blockage removing operation.
Preferably, a plurality of groups of the concave sieve blockage removing devices 2 are distributed on the circumferential direction of the threshing cylinder 1, and the concave sieve blockage removing devices 2 of all the groups are distributed in a circumferential array. Through the layout, the counter weight of the concave plate screen blockage removing device 2 on the threshing cylinder 1 is balanced, and the concave plate screen blockage removing device 2 cannot influence the dynamic balance of the threshing cylinder 1.
The bearing seats 29 are respectively mounted on the two radial plates 13 at the two ends of the rotating shaft 11, the bearing seats 29 on the two radial plates 13 at the two ends of the rotating shaft 11 respectively support the two ends of the bidirectional screw shaft 22, the bidirectional screw shaft 22 is divided into a plurality of sections by all the radial plates 13, each section of the bidirectional screw shaft is provided with a complete guide groove, and a reversing sleeve 23, a reversing block 24 and a limiting guide 25 are arranged correspondingly to each guide groove in a matched manner. In this way, a block clearing mechanism is provided between every two adjacent webs 13.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The concave sieve blockage removing device of the combine harvester is characterized by rotating along with a threshing cylinder (1) of the combine harvester; the concave plate screen blockage cleaning device comprises a spring steel wire (21) and a reciprocating mechanism; the main body part of the spring steel wire (21) extends along the radial direction of the threshing cylinder (1); the reciprocating mechanism makes the spring steel wire (21) perform reciprocating translation along the axial direction of the threshing cylinder (1).
2. The concave sieve blockage removing device of the combine harvester according to claim 1, wherein the reciprocating mechanism comprises a bidirectional screw shaft (22), a reversing sleeve (23), a reversing block (24) and a limiting guide (25);
the bidirectional screw shaft (22) is provided with a guide groove, the guide groove comprises a forward spiral groove (22 a) and a reverse spiral groove (22 b), and two ends of the forward spiral groove (22 a) are respectively communicated with two ends of the reverse spiral groove (22 b) through transition sliding grooves;
the reversing sleeve (23) is sleeved on the bidirectional screw shaft (22) in a sliding manner; the reversing block (24) is arranged in the reversing sleeve (23) and can rotate in the reversing sleeve (23), and the end part of the reversing block (24) is always placed in the guide groove; at the two ends of the guide groove, the reversing block (24) rotates relative to the reversing sleeve (23), and the end part of the reversing block (24) moves along the transition sliding groove to switch between two spiral grooves;
the spring steel wire (21) is arranged on the reversing sleeve (23), and the limiting guide piece (25) enables the spring steel wire (21) to move linearly relative to the threshing cylinder (1).
3. A pit screen blockage clearing device for a combine harvester according to claim 2, characterized in that the spring wire (21) is connected with the reversing sleeve (23) through a connecting rod (26); the limiting guide piece (25) is provided with a guide groove extending along the axial direction of the threshing cylinder (1), and the connecting rod (26) is arranged in the guide groove.
4. A pit screen clearing device for a combine harvester according to claim 3, characterised in that the spring wire (21) has a U-shaped portion (21 a) at its trailing end, the U-shaped portion (21 a) being screwed onto the connecting rod (26).
5. The well screen blockage clearing device of the combine harvester according to claim 2, wherein the reversing sleeve (23) is provided with a transverse through hole (23 a) for the bidirectional screw shaft (22) to pass through and a vertical hole (23 b) for the reversing block (24) to be placed in; sliding sleeves (27) and snap springs (28) for limiting the sliding sleeves (27) are respectively arranged at two ends of the transverse through holes (23 a).
6. A pit screen unblocking apparatus according to claim 2, characterized in that the end of the diverter block (24) has a notch (24 a) in the shape of a circular arc.
7. The threshing cylinder assembly comprises a threshing cylinder (1), wherein the threshing cylinder (1) comprises a rotating shaft (11) and a plurality of threshing toothed bars (12) which are arranged around the rotating shaft (11) in a circumferential array manner; a plurality of radial plates (13) are dispersedly arranged on the axial direction of the rotating shaft (11); characterized in that the threshing cylinder (1) is provided with a concave screen blockage removing device (2) according to any one of claims 2 to 6;
the bidirectional screw shafts (22) are rotatably mounted relative to the wheel webs (13), and the limiting guide pieces (25) are fixed between the adjacent wheel webs (13);
the threshing cylinder (1) is also provided with a driving mechanism (3) for driving the bidirectional screw shaft (22) to rotate.
8. The threshing cylinder assembly according to claim 7, wherein the driving mechanism (3) comprises a central gear (31) sleeved on the rotating shaft (11) and a screw shaft driving gear (32) fixed on the bidirectional screw shaft (22);
the central gear (31) is fixedly arranged relative to a frame of the combine harvester;
the screw shaft driving gear (32) is meshed with the central gear (31).
9. Threshing cylinder assembly according to claim 7, wherein several groups of said concave screen clearing devices (2) are arranged in the circumferential direction of the threshing cylinder (1), said concave screen clearing devices (2) of all groups being arranged in a circumferential array.
10. Threshing system, characterized in that it comprises a threshing cylinder assembly according to any of claims 7-9, further comprising a concave screen (4); the threshing roller component is arranged in the concave plate sieve (4); when the spring steel wire (21) is completely unfolded, the end part of the spring steel wire can penetrate through the sieve holes on the concave plate sieve (4) and extend out of the sieve holes.
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CN202211070502.2A CN115250759B (en) | 2022-09-02 | 2022-09-02 | Concave plate screening and blocking removing device of combine harvester, threshing cylinder assembly and threshing system |
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CN202211070502.2A CN115250759B (en) | 2022-09-02 | 2022-09-02 | Concave plate screening and blocking removing device of combine harvester, threshing cylinder assembly and threshing system |
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CN115250759B CN115250759B (en) | 2024-01-19 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116235708A (en) * | 2023-04-25 | 2023-06-09 | 佳木斯惠尔橡塑股份有限公司 | Threshing device for harvester |
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CN113228945A (en) * | 2021-05-16 | 2021-08-10 | 郑州西格罗丁电子科技有限公司 | Quantitative mechanism of corn threshing device |
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CN110972725A (en) * | 2019-12-08 | 2020-04-10 | 山西农业大学 | Centrifugal thresher is used to coarse cereals crop |
CN111742694A (en) * | 2020-07-27 | 2020-10-09 | 江西农业大学 | Anti-blocking device for concave plate sieve of combine harvester |
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CN116235708A (en) * | 2023-04-25 | 2023-06-09 | 佳木斯惠尔橡塑股份有限公司 | Threshing device for harvester |
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