CN201312493Y - Straw collecting and pulverizing device of maize harvesting machine - Google Patents
Straw collecting and pulverizing device of maize harvesting machine Download PDFInfo
- Publication number
- CN201312493Y CN201312493Y CNU2008202258925U CN200820225892U CN201312493Y CN 201312493 Y CN201312493 Y CN 201312493Y CN U2008202258925 U CNU2008202258925 U CN U2008202258925U CN 200820225892 U CN200820225892 U CN 200820225892U CN 201312493 Y CN201312493 Y CN 201312493Y
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- straw
- housing
- roll
- discharging opening
- pulverizer
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Abstract
The utility model relates to a straw collecting and pulverizing device of a maize harvesting machine, which comprises a straw cutter, a straw collector and a straw pulverizer. The straw cutter is the front end of a fixing frame which is installed below a picking roll and connected with a header fixing frame. The device is characterized in that the straw collector is installed at the rear end of the fixing frame and corresponds to the straw cutter; the straw pulverizer is installed at the front end part of a front frame which is fixedly connected with a power machine; a straw conveyer is arranged between a discharge hole of the straw collector and a feed hole of the straw pulverizer; and a straw thrower is assembled on a discharge hole of the straw pulverizer. Through the straw collecting and pulverizing device, the maize straw is cut by the straw cutter, picked by the picking roll, collected by the straw collector, and conveyed to the straw pulverizer through the straw conveyer for pulverizing, or returned to the field or thrown to a following vehicle by the straw thrower for reutilization. The device has the advantages of compact structure, reasonable design, reliable operation and strong practicability.
Description
Technical field
The utility model relates to a kind of shredding mechanism with the harvesting crop, especially a kind of straw collecting and pulverizing device of the maize harvesting machine that the maize straw of plucking behind the fringe can be handled.
Background technology
Corn is one of staple crops of China, and its cultivated area is only second to paddy rice, mainly is distributed in areas such as northeast, North China and northwest.Maize harvesting machine has mechanical automation degree height, strong, the results efficient advantages of higher of easy to operate, adaptability because of it, and extensively is subjected to the welcome of peasant household.Adopt maize harvesting machine that corn is carried out in the results process, processing of stalk also is an important techniques problem behind fringe to plucking for it.Existing Backpack-type maize harvester on the market, its processing to stalk is to adopt the hammer disk mill of body postposition to carry out break process, promptly utilize the hammer pawl of the cracker that is arranged at rear tractor that maize straw is impacted fragmentation fast, realize straw-returning.But along with the rise of livestock breeding industry, maize straw can be used as a kind of very excellent green fodder at present, and processing and utilization will be reclaimed with maize straw in the corn planting family.Therefore adopting rearmounted hammer disk mill that stalk is handled, loose because of arbitrarily throwing after its stalk fragmentation, problem such as soil-containing rate height, is to be unfavorable for planting the family maize straw is reclaimed and to utilize.Primary study and exploitation have been done for this reason by numerous agricultural machinery producer.For example: the application that proposes by the applicant and authorize the Chinese utility model patent specification of disclosed CN2877247Y on March 14th, 2007 in a kind of " backpack stalk-spike-reaping maize harvesting machine " disclosed, it comprises harvesting-platform, fruit ear is carried gathering unit, crushed stalk retracting device and actuating unit, harvesting-platform comprises the forebay that is fixedly connected with tractor, several results bodies that ceding of Taiwan fixed mount that connects with forebay and ceding of Taiwan fixed mount are provided with, wherein each results body comprises that the axis of a pair of fore-and-aft tilt is parallel, snapping bar and a pair of dialing-grain unit that rotates that drives by power-transmitting part that height interlaces and arranges, on the ceding of Taiwan fixed mount below the dialing-grain unit, be provided with by stationary knife, the straw cutter that moving knife is formed, the straw cutter is realized reciprocal shearing motion by power-transmitting part, the crushed stalk retracting device comprises Straw cutting machine, auger conveyor and stalk throwing device, cutter mill correspondence respectively is arranged on the ceding of Taiwan fixed mount of snapping bar below, be by the housing that has feeding mouth and discharging opening, line shaft, the chopping moving knife, stationary knife is formed, the last feeding mouth placement direction of cutter mill housing is identical with the placement direction and the corn stalk direction of motion of snapping bar, auger conveyor is installed on the ceding of Taiwan fixed mount of lower discharge port below of cutter mill housing, one end of auger conveyor is communicated with the stalk throwing device, and the discharging opening of spinner is corresponding with the trailer of following tractor.What this maize harvesting machine adopted the processing of stalk is that the mode that reclaims is collected in first pulverizing, back, be that maize straw is to pull down by rotating snapping bar to send, it becomes the feeding roller of cutter mill, sends in the cutter mill and shreds, by the auger conveyor lateral collection, reclaim again through the throwing of stalk throwing device.But above-mentioned disclosed maize harvesting machine, its cutter mill is corresponding one by one the setting below snapping bar, along with increasing of harvest corn line number, the quantity of snapping bar, cutter mill is wanted corresponding increase, therefore can cause the weight increase of equipment and the rising of manufacturing cost, auger conveyor and stalk throwing device also are to be assemblied on ceding of Taiwan fixed mount tractor the place ahead, that connect with forebay simultaneously, thereby caused the centre offset of harvest equipment on tractor, the front-wheel of tractor is taken place in running " fall in ground " phenomenon influences operation.
Summary of the invention
In order to overcome harvest equipment centre offset on the tractor and the high deficiency of manufacturing cost in the prior art, the utility model provides a kind of maize harvesting machine straw collecting and pulverizing device.Not only compact conformation rationally, simple installation, cost be low for this straw crushing and collecting device, and reliable, maize straw can be collected earlier, the back chopping reclaims.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of maize harvesting machine straw collecting and pulverizing device, comprise a straw cutter, a straw collecting device, a straw pulverizer, described straw cutter be mounted in snapping bar below, with the joining fixed mount front end of ceding of Taiwan fixed mount, form by stationary knife, moving knife, and realize reciprocal shearing motion through power-transmitting part; Described straw collecting device is made up of a cartridge type housing and the rotation roll shaft of a rotational support on housing that has feeding mouth, discharging opening, is fixed with spiral blade on the rotation roll shaft, rotates roll shaft and drives rotation by power-transmitting part; Described straw pulverizer is made up of a cartridge type housing and the moving knife roll shaft of a rotational support on housing that has feeding mouth and discharging opening, on the periphery of moving knife roll shaft, be evenly equipped with moving knife, one stationary knife is installed on the tool fixing frame that is positioned at the feeding mouth place by fixture, described moving knife roll shaft is driven by drive disk assembly and rotates, it is characterized in that: the corresponding straw cutter of described straw collecting device is installed in the fixed mount rear end, described straw pulverizer is installed in the leading section of the forebay that is fixedly connected with engine, is provided with a stalk conveyer between the feeding mouth of the discharging opening of described straw collecting device and described straw pulverizer.
The described straw collecting device that is installed in the fixed mount rear end, it is fixed on the spiral blade that rotates on the roll shaft is symmetry, setting in opposite directions, the corresponding housing discharging opening is fixed with some toothed group of plates on the rotation roll shaft periphery between two spiral blades.
Stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it is that rigid attachment is on the fixed mount that straw cutter, straw collecting device are installed, this stalk conveyer is by forming with the housing of fixed mount rigid attachment and the conveying roller that level is installed between housing, described conveying roller comprises one group of toothed lower roll and top roll, and described lower roll, top roll are driven to turn round relatively by driving member and pinch stalk.
Stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it comprises that also one group of level is installed in a smooth roll once and the toothed top roll between the output housing, and described smooth roll down drives relative revolution delivery stalk with band tooth top roll by driving member.
Stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it is being equipped with a band tooth lower roll and also is being horizontally installed with a toothed intermediate calender rolls on the housing between the smooth roll once, this intermediate calender rolls and described band tooth lower roll, smooth roll speed, rotation in the same way together down, and be on the same transportation work face.
Stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, its band tooth top roll that is installed between housing can upper and lowerly float.
Discharging opening in described straw pulverizer also assembles a stalk throwing device, this stalk throwing device is installed in the forebay middle and upper part that is fixedly connected with engine, form by a cartridge type housing and the turning cylinder of a rotational support on housing that has feeding mouth, discharging opening, on turning cylinder, be fixed with the throwing impeller, assembling one is thrown and is sent conduit on the discharging opening of housing, and turning cylinder is driven by drive disk assembly and rotates.
The utility model is that stalk is cut off, after snapping bar plucks fringe, collected through the straw collecting device earlier by the straw cutter, and the back is transported in the straw pulverizer by the stalk conveyer and pulverizes, or field or recycled in accompanying vehicle by the throwing of stalk throwing device also.
The utility model compactness rational in infrastructure, easy for installation, cost is low, and each performance element body is distributed in respectively on the engine, the engine gravity balance, reliable, applicability is strong.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a kind of structural front view of the present utility model.
Fig. 2 is that A among Fig. 1 is to zoomed-in view.
Fig. 3 is the cutaway view along B among Fig. 1-B line.
Fig. 4 is the structural representation after the stalk conveyer among Fig. 1 removes a side body.
Fig. 5 is the zoomed-in view of the stalk conveyer among Fig. 1.
Fig. 6 is the rearview of Fig. 5.
1. snapping bars among the figure, 2. straw cutter, 201. stationary knifes, 202. moving knife, 3. straw collecting device, 301. cartridge type housings, 302. feeding mouths, 303. spiral blades, 304. discharging opening, 305. groups of plates, 306. spiral blades, 307. rotate roll shaft, 4. fixed mount, 5. stalk conveyer, 501. housings, 502. band tooth top rolls, 503. band tooth lower roll, 504. intermediate calender rolls, 505. times smooth rolls, 506. band tooth top roll, 507. back-moving springs, 508. crank throw connecting plates, 509. connecting plate, 5010. back-moving springs, 5011. crank throw connecting plates, 5012. back-moving spring, 5013. crank throw connecting plates, 5014 back-moving springs, 5015 jackshafts, 6. straw pulverizer, 601. stationary knifes, 602. moving knife, 603. feeding mouths, 604. moving knife roll shafts, 605. the cartridge type housing, 606. discharging openings, 607. bearing blocks, 7. forebay, 8. stalk throwing device, 801. throwing impellers, 802. turning cylinder, 803. cartridge type housings, conduit is sent in 804. throwings, 9. ceding of Taiwan fixed mount, 10. groove, 11. grooves.
Embodiment
In Fig. 1, a kind of maize harvesting machine straw collecting and pulverizing device, comprise a straw cutter 2, this straw cutter 2 be mounted in snapping bar 1 below, with ceding of Taiwan fixed mount 9 joining fixed mount 4 front ends, form by stationary knife 201, moving knife 202, and realize reciprocal shearing motion through power-transmitting part, the maize straw root can be cut off.
As shown in Figure 1, a kind of maize harvesting machine straw collecting and pulverizing device also comprises a straw collecting device 3, and straw collecting device 3 corresponding straw cutters 2 are installed in fixed mount 4 rear ends by bearings.
As shown in Figure 2, straw collecting device 3 is that a cartridge type housing 301 and the rotation roll shaft 307 of a rotational support on this housing are formed, cartridge type housing 301 is provided with a feeding mouth 302 and a discharging opening 304, rotating on the roll shaft 307 spiral blade 303,306 that is fixed with symmetry, is provided with in opposite directions, corresponding housing discharging opening 304 evenly is fixed with 6 toothed group of plates 305 on rotation roll shaft 307 peripheries between two spiral blades 303,306.The maize straw that the rotation of two spiral blades 303,306 is collected runs to the middle part of two spiral blades, dials plate 305 by the band tooth and pulls over and send through housing discharging opening 304, realizes follow-up processing processing.
In Fig. 1, a kind of maize harvesting machine straw collecting and pulverizing device also comprises a straw pulverizer 6, and this straw pulverizer 6 is mounted in the leading section of the forebay 7 that is fixedly connected with engine.
Straw pulverizer 6 by a cartridge type housing 605 and a rotational support moving knife roll shaft 604 on housing form, on cartridge type housing 605, be respectively arranged with a feeding mouth 603 and a discharging opening 606.Be installed on the tool fixing frame that is positioned at feeding mouth 603 places by fixture being evenly equipped with moving knife 602, one stationary knifes 601 on the periphery of moving knife roll shaft 604.
As shown in Figure 3, the moving knife roll shaft 604 of straw pulverizer 6 is installed on the forebay 7 through a bearing block 607.But relatively rotate on these bearing block 607 mmi machine framves 7.
The moving knife roll shaft 604 of straw pulverizer 6 can drive be rotated by drive disk assembly, makes to produce between the stationary knife 601 at moving knife uniform on the moving knife roll shaft 604 602 and housing feeding mouth 603 places to shear, and will be transported to the maize straw pulverizing at feeding mouth 603 places.
In Fig. 1, between the feeding mouth 603 of the discharging opening of straw collecting device 3 and straw pulverizer 6, also be provided with a stalk conveyer 5.Stalk conveyer 5 is that rigid attachment is on fixed mount 4.
As shown in Figure 4, stalk conveyer 5 is by forming with the housing 501 of fixed mount rigid attachment and the conveying roller that level is installed between housing, this conveying roller comprises one group of toothed lower roll 503 and toothed top roll 502, the toothed lower roll 503 of this group drives relative revolution with top roll 502 by driving member, and maize straw is carried in clamping.
In Fig. 4, conveying roller comprises that also one group of level is installed in a smooth roll once 505 and the toothed top roll 506 between housing 501 outputs, and smooth roll 505 drives relative revolution, delivery maize straw with band tooth top roll 506 by driving member under this group.
Among Fig. 4, between band tooth lower roll 503 and following smooth roll 505, also be horizontally installed with a toothed intermediate calender rolls 504 on its housing 501.This intermediate calender rolls 504 and band tooth lower roll 503, smooth roll 505 speed, rotation in the same way together down, and be on the same transportation work face.Intermediate calender rolls 504 has played the effect of delivery maize straw.
The band tooth top roll 502 and the band tooth top roll 506 that are installed between housing can upper and lowerly float.As Fig. 5, shown in Figure 6, upper and lower the floating of band tooth top roll 502 and band tooth top roll 506 is achieved in that corresponding respectively having for band tooth top roll 502 and band tooth top roll 506 upper and lower unsteady grooves 10,11 on two housings 501.Among Fig. 5, correspondence is equipped with back-moving spring 507,5010 respectively on a sidewall of housing 501, be positioned on the roll shaft of band tooth top roll 506 of groove 10 and connect with an end of connecting plate 508,509 is movable respectively, the other end of connecting plate 509 is movably arranged on the roll shaft of band tooth top roll 502, the roll shaft of band tooth top roll 502 is positioned at groove 11, and back-moving spring 5010 is hooked on the middle part of connecting plate 509; Connecting plate 508 is connecting plates of a crank throw shape, and position, intermediate portion hinge is contained on the jackshaft 5015 that is assemblied in housing 501, and its crank end connects with back-moving spring 507 hooks.In Fig. 6, correspondence is equipped with back-moving spring 5012,5014 respectively on the sidewall of opposite side housing 501, be positioned on the roll shaft of band tooth top roll 506 opposite sides of its groove 10 and connect with an end of connecting plate 5011,5013 is movable respectively, connecting plate 5011,5013 is respectively the connecting plate of a crank throw shape, the middle part of connecting plate 5011 is hinged on the jackshaft 5015, and its crank end connects with back-moving spring 5012 hooks; The middle part of connecting plate 5013 is movably arranged on the opposite side roll shaft of band tooth top roll 502, and the roll shaft of this band tooth top roll 502 is installed in the groove 11 of opposite side housing, and the crank end of connecting plate 5013 connects with back-moving spring 5014 hooks.
As Fig. 4, Fig. 5, shown in Figure 6, when the maize straw thickness is uneven, band tooth top roll 502 that cooperates with band tooth lower roll 503 and the band tooth top roll 506 that cooperates with following smooth roll 505 are under the acting in conjunction of back-moving spring that is positioned at the housing both sides and connecting plate, can upper and lowerly float, to guarantee the smooth delivery of power of maize straw.
In Fig. 1, a kind of maize harvesting machine straw collecting and pulverizing device, a stalk throwing device 8 is also assembled at discharging opening 606 places in straw pulverizer 6, this stalk throwing device 8 is installed on the middle and upper part support body of the forebay 7 that is fixedly connected with engine, have cartridge type housing 803 and the turning cylinder 820 of a rotational support on housing formed by one, be fixed with throwing impeller 801 on turning cylinder 802, assembling one is thrown and is sent conduit 804 on the discharging opening of housing.Turning cylinder 802 is driven by drive disk assembly and rotates, and the crushing straw that straw pulverizer is sent here send the conduit ejection with higher speed by throwing, and the crushing straw of ejection can be accepted and recovery by accompanying vehicle.
The utility model is when work, maize straw is cut off from its root by straw cutter 2, and pluck fringe by snapping bar 1, plucking maize straw behind the fringe is pushed to housing discharging opening 304 by straw collecting device 3 with it and sends, be transported in the straw pulverizer 6 by stalk conveyer 5 again and pulverize, realized straw-returning, perhaps thrown and deliver to accompanying vehicle acceptance and recovery by stalk throwing device 8.
Claims (8)
1, a kind of maize harvesting machine straw collecting and pulverizing device, comprise a straw cutter, a straw collecting device, a straw pulverizer, described straw cutter be mounted in snapping bar below, with the joining fixed mount front end of ceding of Taiwan fixed mount, form by stationary knife, moving knife, and realize reciprocal shearing motion through power-transmitting part; Described straw collecting device is made up of a cartridge type housing and the rotation roll shaft of a rotational support on housing that has feeding mouth, discharging opening, is fixed with spiral blade on the rotation roll shaft, rotates roll shaft and drives rotation by power-transmitting part; Described straw pulverizer is made up of a cartridge type housing and the moving knife roll shaft of a rotational support on housing that has feeding mouth and discharging opening, on the periphery of moving knife roll shaft, be evenly equipped with moving knife, one stationary knife is installed on the tool fixing frame that is positioned at the feeding mouth place by fixture, described moving knife roll shaft is driven by drive disk assembly and rotates, it is characterized in that: the corresponding straw cutter of described straw collecting device is installed in the fixed mount rear end, described straw pulverizer is installed in the leading section of the forebay that is fixedly connected with engine, is provided with a stalk conveyer between the feeding mouth of the discharging opening of described straw collecting device and described straw pulverizer.
2, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 1, it is characterized in that: the described straw collecting device that is installed in the fixed mount rear end, it is fixed on the spiral blade that rotates on the roll shaft is symmetry, setting in opposite directions, and the corresponding housing discharging opening is fixed with some toothed group of plates on the rotation roll shaft periphery between two spiral blades.
3, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 1 and 2, it is characterized in that: the stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it is that rigid attachment is on the fixed mount that straw cutter, straw collecting device are installed, this stalk conveyer is by forming with the housing of fixed mount rigid attachment and the conveying roller that level is installed between housing, described conveying roller comprises one group of toothed lower roll and top roll, and described lower roll, top roll are driven to turn round relatively by driving member and pinch stalk.
4, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 3, it is characterized in that: the stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it comprises that also one group of level is installed in a smooth roll once and the toothed top roll between the output housing, and described smooth roll down drives relative revolution delivery stalk with band tooth top roll by driving member.
5, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 4, it is characterized in that: the stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, it is being equipped with a band tooth lower roll and also is being horizontally installed with a toothed intermediate calender rolls on the housing between the smooth roll once, this intermediate calender rolls and described band tooth lower roll, smooth roll speed, rotation in the same way together down, and be on the same transportation work face.
6, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 3, it is characterized in that: the stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, its band tooth top roll that is installed between housing can upper and lowerly float.
7, according to claim 4 or 5 described a kind of maize harvesting machine straw collecting and pulverizing devices, it is characterized in that: the stalk conveyer between the feeding mouth of described discharging opening that is arranged on the straw collecting device and straw pulverizer, its band tooth top roll that is installed between housing can upper and lowerly float.
8, a kind of maize harvesting machine straw collecting and pulverizing device according to claim 1, it is characterized in that: the discharging opening in described straw pulverizer also assembles a stalk throwing device, this stalk throwing device is installed in the forebay middle and upper part that is fixedly connected with engine, form by a cartridge type housing and the turning cylinder of a rotational support on housing that has feeding mouth, discharging opening, on turning cylinder, be fixed with the throwing impeller, assembling one is thrown and is sent conduit on the discharging opening of housing, and turning cylinder is driven by drive disk assembly and rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202258925U CN201312493Y (en) | 2008-11-13 | 2008-11-13 | Straw collecting and pulverizing device of maize harvesting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202258925U CN201312493Y (en) | 2008-11-13 | 2008-11-13 | Straw collecting and pulverizing device of maize harvesting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201312493Y true CN201312493Y (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202258925U Expired - Lifetime CN201312493Y (en) | 2008-11-13 | 2008-11-13 | Straw collecting and pulverizing device of maize harvesting machine |
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| CN (1) | CN201312493Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101731057B (en) * | 2008-11-13 | 2013-03-20 | 荣成市海山机械制造有限公司 | Straw collecting and pulverizing device of corn harvester |
| CN103053272A (en) * | 2012-12-20 | 2013-04-24 | 荣成市海山机械制造有限公司 | Straw conveying and throwing device of corn harvester |
| CN103168554A (en) * | 2013-04-02 | 2013-06-26 | 王光敏 | Turf harvester |
| CN104984784A (en) * | 2015-07-02 | 2015-10-21 | 中机美诺科技股份有限公司 | Grain crushing device for forage harvester |
| CN105210571A (en) * | 2014-05-28 | 2016-01-06 | 东北农业大学 | The three-dimensional field-returning machine of a kind of maize straw |
-
2008
- 2008-11-13 CN CNU2008202258925U patent/CN201312493Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101731057B (en) * | 2008-11-13 | 2013-03-20 | 荣成市海山机械制造有限公司 | Straw collecting and pulverizing device of corn harvester |
| CN103053272A (en) * | 2012-12-20 | 2013-04-24 | 荣成市海山机械制造有限公司 | Straw conveying and throwing device of corn harvester |
| CN103168554A (en) * | 2013-04-02 | 2013-06-26 | 王光敏 | Turf harvester |
| CN105210571A (en) * | 2014-05-28 | 2016-01-06 | 东北农业大学 | The three-dimensional field-returning machine of a kind of maize straw |
| CN104984784A (en) * | 2015-07-02 | 2015-10-21 | 中机美诺科技股份有限公司 | Grain crushing device for forage harvester |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090923 Effective date of abandoning: 20081113 |
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| RGAV | Abandon patent right to avoid regrant |