CN210275137U - Fan device of corn harvester - Google Patents
Fan device of corn harvester Download PDFInfo
- Publication number
- CN210275137U CN210275137U CN201920844185.2U CN201920844185U CN210275137U CN 210275137 U CN210275137 U CN 210275137U CN 201920844185 U CN201920844185 U CN 201920844185U CN 210275137 U CN210275137 U CN 210275137U
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- elevator
- suction fan
- housing
- crushing
- shell
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Abstract
The utility model discloses a fan device of a corn harvester, which comprises an elevator, a suction fan, a blower, a secondary stem drawing machine, a peeler and a grain recoverer, when sundries enter the elevator along with ears, the sundries can be sucked into the suction fan under the suction force of the suction fan in the process of being conveyed by a conveying chain, and are crushed and discharged out of the suction fan by wind power under the action of a crushing flail knife of the suction fan, so that the upper end of the elevator can not be blocked, the secondary stem drawing roller can be drawn out timely, the remaining sundries can be discharged from an air outlet by the wind power of the blower, after the secondary stem drawing roller is drawn out, the ears can enter the peeler and are peeled by a peeling roller, the corn grains, husks and beards stripped by the peeling roller fall down to a grain recovery sieve plate, partial corn beards can be blown out by the recovery fan after passing through holes of the grain recovery sieve plate, and few corn grains in the grain recoverer are realized, has good practicability.
Description
Technical Field
The utility model relates to a harvester technical field specifically, relates to a corn harvester fan device.
Background
With the development of society and the continuous progress of agricultural science and technology, agricultural mechanization begins to be popularized rapidly, corn harvesters are more and more favored by farmers due to the high harvesting efficiency of the corn harvesters, and with the continuous deepening of agricultural modernization, the corn harvesters are bound to become one of important tools of modern agriculture, but with the high-intensity use of the corn harvesters, many problems are caused.
At present, a corn harvester on the market is generally provided with a blower at the bottom of an ear elevator, most of sundries such as straws, husks and weeds conveyed from the elevator are pumped out by a contra-rotating secondary stalk-pulling roller and then are blown by the blower to be discharged from an air outlet, but the straws and other sundries with different lengths and thicknesses reach the upper end of the elevator, so that the upper end of the elevator is easily blocked, the load of a peeling machine is increased, the peeling rate is reduced, the service life of the peeling roller is shortened, the failure rate of the peeling machine is increased, and when the secondary stalk-pulling roller is not pumped out timely, the sundries cannot be discharged from the air outlet by the blower, the air outlet is blocked, and the harvesting operation is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the prior art is not enough to overcome, and a corn harvester fan device is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an embodiment of the utility model provides a corn harvester fan device, draw stem machine, peeler and seed grain recoverer including lift conveyer, suction fan, hair-dryer, secondary, wherein:
the secondary stem pulling machine, the peeling machine and the seed grain recoverer are fixedly connected in sequence from top to bottom, one end of the elevator is fixedly connected with the secondary stem pulling machine, the suction fan is fixedly arranged at the upper part of one end of the elevator fixedly connected with the secondary stem pulling machine, and the blower is fixedly arranged at the lower part of one end of the elevator fixedly connected with the secondary stem pulling machine;
the elevator comprises a shell, an elevator transmission chain, an elevator scraper blade, an elevator upper shaft and an elevator lower shaft, wherein the elevator upper shaft is arranged on the inner side of the upper part of one end, fixedly connected with the secondary stem drawing machine, of the shell;
the suction fan comprises a suction fan shell, a suction fan main shaft, suction fan blades and a crushing flail knife, wherein the suction fan main shaft is rotatably arranged in the suction fan shell, the suction fan blades are fixedly arranged on the suction fan main shaft, and the crushing flail knife is fixedly arranged on the suction fan main shaft at one side of the suction fan blades;
the shell of the elevator is provided with a fruit ear inlet which is arranged above the lower shaft of the elevator, the shell of the suction fan is provided with an air suction opening and an air outlet, the air suction opening is arranged opposite to the blades of the suction fan, the air outlet is arranged opposite to the crushing flail knife, the air suction opening is communicated with the shell, and the air outlet faces the outer side of the elevator;
the shell of the elevator is also provided with a beam outlet, the blower is fixedly arranged below the elevator, and the blowing port of the blower and the beam outlet face in the same direction;
the secondary stalk pulling machine comprises a straw guide rod and a secondary stalk pulling stick, one end of the straw guide rod is connected with a beam outlet on the shell of the elevator, and one end of the straw guide rod is connected with the secondary stalk pulling stick;
the peeling machine comprises a peeling frame and a peeling roller, the peeling frame is arranged below the secondary stem pulling machine, the peeling roller can be rotatably arranged on the peeling frame, one end of the peeling frame, far away from the elevator, is provided with a fruit ear outlet, and the bottom of the peeling frame is provided with a blanking port;
the seed grain recoverer comprises a seed grain recovery frame, a seed grain recovery sieve plate and a recovery fan, wherein the seed grain recovery frame is fixedly arranged below the peeling machine, the seed grain recovery sieve plate is arranged inside the seed grain recovery frame, and the recovery fan is arranged below the seed grain recovery sieve plate.
Optionally, the suction fan blades are provided with a plurality of blades, each suction fan blade comprises a blade bottom plate and two blade reinforcing plates, the blade bottom plates are fixedly arranged on the suction fan main shaft, and the two blade reinforcing plates are oppositely arranged on two sides of the blade bottom plates.
Optionally, the top of the blade reinforcing plate is bent away from the blade bottom plate.
Optionally, the crushing flail knife comprises a plurality of crushing blades and a plurality of crushing blade seats, the plurality of crushing blade seats are arranged around the main shaft of the suction fan, one ends of the plurality of crushing blade seats are fixedly arranged on the main shaft of the suction fan, and the other ends of the plurality of crushing blade seats are fixedly connected with the corresponding crushing blades.
Optionally, the suction fan further comprises a fixing ring, and the other ends of the plurality of crushing cutter seats are fixedly connected through the fixing ring.
Optionally, the blower device of the corn harvester further comprises an oil injector, and the oil injector is fixedly arranged at the joint of the suction fan and the elevator.
Optionally, the suction fan housing comprises a first housing and a second housing which are arranged side by side, the suction fan main shaft rotatably penetrates through the first housing and the second housing, the first housing and the second housing are communicated, the suction fan blades are fixedly arranged in the first housing, and the crushing flail knife is fixedly arranged in the second housing.
Alternatively, the first housing and the second housing may be relatively rotatable.
The utility model provides a fan device of a corn harvester, because a suction fan is fixedly arranged on an elevator, and an air suction port is opposite to an ear inlet, when sundries enter the elevator along with ears, the sundries can be sucked into the suction fan under the suction force of the suction fan in the conveying process of a conveying chain, the sundries are crushed and discharged out of the suction fan by wind power under the action of a crushing flail knife of the suction fan, the upper end of the elevator can not be blocked, so that a secondary stem pulling roller can be drawn out in time, the remaining sundries can be discharged from an air outlet by the wind power of a blower, after the secondary stem pulling roller is drawn out, the ears can enter a peeling machine, peeling treatment is carried out by a peeling roller, corn kernels peeled off from the peeling roller, wrappers and beards can fall down to a kernel recovery sieve plate, partial corn beards can be blown back by the recovery fan through holes of the kernel recovery sieve plate, and few corn kernels can be realized, has good practicability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a fan device of a corn harvester according to the present invention;
fig. 2 is a schematic front view of the suction fan of the present invention;
fig. 3 is a schematic axial side structure diagram of the suction fan of the present invention;
fig. 4 is a schematic sectional structure view of the suction fan of the present invention;
fig. 5 is a schematic view of the internal structure of the suction fan of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is the utility model discloses a structural schematic diagram of corn harvester fan device, fig. 2 is the utility model discloses a front view structural schematic diagram of suction fan, it is shown with fig. 2 to combine, the embodiment of the utility model discloses a corn harvester fan device includes that lift conveyor 1, suction fan 2, hair-dryer 3, the secondary draws stem machine 4, peeler 5 and seed grain recoverer 6 from last to fixed connection in proper order down, the one end and the secondary of lift conveyor 1 draw stem machine 4 fixed connection, suction fan 2 is fixed to be set up on the upper portion of lift conveyor 1 and the secondary draw stem machine 4 fixed connection's one end, hair-dryer 3 is fixed to be set up in the lower part of lift conveyor 1 and the secondary draw stem machine 4 fixed connection's one end.
Specifically, the elevator 1 includes a housing 11, an elevator transmission chain 12, an elevator scraper 13, an elevator upper shaft 14 and an elevator lower shaft 15, the elevator upper shaft 14 is arranged on the inner side of the upper part of one end of the housing 11 fixedly connected with the secondary stem-pulling machine 4, the elevator lower shaft 15 is arranged on the inner side of the other end of the housing 11, the elevator transmission chain 12 is arranged inside the housing 11, the elevator scraper 13 is arranged on the surface of the elevator transmission chain 12, and the elevator upper shaft 14 is connected with the elevator lower shaft 15 through the elevator transmission chain 12;
specifically, the suction fan comprises a suction fan shell 21, a suction fan main shaft 22, suction fan blades 23 and a crushing flail knife 24, wherein the suction fan main shaft 22 is rotatably arranged in the suction fan shell 21, the suction fan blades 23 are fixedly arranged on the suction fan main shaft 22, and the crushing flail knife 24 is fixedly arranged on the suction fan main shaft 22 at one side of the suction fan blades 23;
specifically, a shell 11 of the elevator 1 is provided with a fruit ear inlet, the fruit ear inlet is arranged above a lower shaft 15 of the elevator, a suction fan shell 21 is provided with an air suction opening and an air outlet, the air suction opening is arranged opposite to a suction fan blade 23, the air outlet is arranged opposite to a crushing flail knife 24, the air suction opening is communicated with the shell 11, and the air outlet faces the outer side of the elevator 1;
specifically, a beam outlet is further arranged on the shell 11 of the elevator 1, the blower 3 is fixedly arranged below the elevator 1, and the blowing port of the blower 3 and the beam outlet face in the same direction;
specifically, the secondary stem pulling machine 4 comprises a straw guide rod 41 and a secondary stem pulling rod 42, one end of the straw guide rod 41 is connected with a beam outlet on the shell 11 of the elevator 1, and one end of the straw guide rod 41 is connected with the secondary stem pulling rod 42;
specifically, the peeling machine 5 comprises a peeling frame 51 and a peeling roller 52, the peeling frame 51 is arranged below the secondary stem pulling machine 4, the peeling roller 52 is rotatably arranged on the peeling frame 51, one end of the peeling frame 51, which is far away from the elevator 1, is provided with an ear outlet, and the bottom of the peeling frame 51 is provided with a blanking port;
concretely, seed grain recoverer 6 includes that the seed grain retrieves frame 61, and screen 62 and recovery fan 63 are retrieved to the seed grain, and the fixed below that sets up at peeler 5 is retrieved to seed grain retrieval frame 61, and inside the screen 62 setting was retrieved at seed grain retrieval frame 61 to the seed grain, the below of retrieving screen 62 at seed grain recovery fan 63 setting.
Fig. 4 is the utility model discloses a cross-sectional structure schematic diagram of suction fan, fig. 5 is the utility model discloses an internal structure schematic diagram of suction fan, it is shown with fig. 5 to combine, suction fan blade 23 is provided with a plurality ofly, each suction fan blade 23 all includes blade bottom plate 231 and two blade reinforcing plates 232, blade bottom plate 231 is fixed to be set up on suction fan main shaft 22, two blade reinforcing plates 232 set up the both sides at blade bottom plate 231 relatively, and the direction that blade bottom plate 231 was kept away from mutually at blade reinforcing plate 232's top is buckled, when the blade rotated along with suction fan main shaft 22, can produce great wind-force, thereby follow debris suction in the fruit cluster.
Further, as shown in fig. 5, the crushing flail knife 24 includes a plurality of crushing blades 241 and a plurality of crushing knife bases 242, the plurality of crushing knife bases 242 are disposed around the suction fan main shaft 22, one ends of the plurality of crushing knife bases 242 are fixedly disposed on the suction fan main shaft 22, the other ends of the plurality of crushing knife bases 242 are fixedly connected with the corresponding crushing blades 241, the crushing blades 241 can rapidly crush the impurities along with the rotation process of the suction fan main shaft 22, and then are flail out from the gap between the two crushing knife bases 242, so as to discharge the suction fan through the air outlet.
Further, the suction fan 2 further comprises a fixing ring 25, the other ends of the plurality of crushing cutter holders 242 are fixedly connected through the fixing ring 25, and the fixing ring 25 reinforces the stability of the crushing cutter holders 242.
Further, corn harvester fan unit still includes the oil squirt, and the oil squirt is fixed to be set up on the junction of suction fan 2 and lift conveyor 1, and the oil-out of oil squirt is linked together with suction fan 2 and lift conveyor 1, injects lubricating oil through oil squirt 4, guarantees the lubrication and the steady operation of all machines.
Furthermore, a first chain wheel is arranged at the first end of the lower shaft 15 of the elevator, a transition shaft is arranged on the suction fan shell 21, a second chain wheel and a third chain wheel are arranged at the first end of the transition shaft, a fourth chain wheel is arranged at the first end of the main shaft of the suction fan, the first chain wheel is connected with the second chain wheel through a chain, and the third chain wheel is connected with the fourth chain wheel through another chain. The elevator 1 is provided with a motor with power input, the motor drives the elevator lower shaft 15 to rotate, so that the elevator transmission chain 12 is controlled to convey the fruit clusters, and along with the rotation of the elevator lower shaft 15, the power of the motor can be transmitted to the fourth chain wheel through the first chain wheel through the step transmission of the two chains, so that the rotation of the suction fan main shaft 22 is ensured, and the suction force is generated.
Furthermore, a first connecting rod and a second connecting rod are arranged on the suction fan shell 21, a first tensioning wheel is arranged at one end, away from the suction fan shell 21, of the first connecting rod, the first tensioning wheel is connected with one chain, a second tensioning wheel is arranged at one end, away from the suction fan shell 21, of the second connecting rod, the second tensioning wheel is connected with the other chain, and due to the fact that the chains are easy to loosen in the rotating process, the two tensioning wheels are arranged to respectively compress the two chains, tensioning of the chains can be achieved, and transmission is more stable.
Fig. 3 is a schematic axial side structure of the suction fan of the present invention, as shown in fig. 3, the suction fan housing 21 includes a first housing 211 and a second housing 212 arranged side by side, the suction fan main shaft 22 rotatably passes through the first housing 211 and the second housing 212, the first housing 211 and the second housing 212 are communicated, the suction fan blade 23 is fixedly arranged in the first housing 211, the crushing flail knife 24 is fixedly arranged in the second housing 212, the first housing 211 and the second housing 212 can rotate relatively, when the elevator 1 needs to be set to different angles, the heights of the fruit clusters are different, and the angle of the air outlet also needs to be adjusted when impurities are discharged, therefore, after the first shell 211 is fixedly arranged on the elevator 1, the air suction opening is always aligned with the ear inlet, the second housing 212 can rotate on the main shaft 22 of the suction fan, so as to adjust the position of the air outlet and discharge the impurities into the impurity recovery point.
The embodiment of the specification provides a fan device of a corn harvester, wherein a suction fan is fixedly arranged on an elevator, an air suction port is opposite to an ear inlet, when impurities enter the elevator along with ears, the impurities are sucked into the suction fan under the suction force of the suction fan in the conveying process of a conveying chain, the impurities are crushed and discharged out of the suction fan by wind power under the action of a crushing flail knife of the suction fan, the upper end of the elevator cannot be blocked, so that a secondary stem pulling roller is drawn out timely, the residual impurities can be discharged from an air outlet by the wind power of a blower, after the secondary stem pulling roller is drawn out, the ears enter a peeling machine and are subjected to peeling treatment by a peeling roller, corn kernels, husks and beard kernels peeled off from the peeling roller fall to a recovery sieve plate, part of corn beard hairs can be blown back by the recovery fan through holes of the recovery sieve plate, and few impurities in the corn kernels can be recovered, has good practicability.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. It should be noted that, for those skilled in the art, without departing from the principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present application.
Claims (8)
1. The utility model provides a corn harvester fan device, its characterized in that, includes lift conveyer (1), suction fan (2), hair-dryer (3), secondary stem machine (4), peeler (5) and seed grain recoverer (6), wherein:
the secondary stem pulling machine (4), the peeling machine (5) and the seed grain recoverer (6) are fixedly connected from top to bottom in sequence, one end of the elevator (1) is fixedly connected with the secondary stem pulling machine (4), the suction fan (2) is fixedly arranged at the upper part of one end of the elevator (1) fixedly connected with the secondary stem pulling machine (4), and the blower (3) is fixedly arranged at the lower part of one end of the elevator (1) fixedly connected with the secondary stem pulling machine (4);
the elevator (1) comprises a shell (11), an elevator transmission chain (12), an elevator scraper (13), an elevator upper shaft (14) and an elevator lower shaft (15), wherein the elevator upper shaft (14) is arranged on the inner side of the upper part of one end, fixedly connected with the secondary stem pulling machine (4), of the shell (11), the elevator lower shaft (15) is arranged on the inner side of the other end of the shell (11), the elevator transmission chain (12) is arranged in the shell (11), the elevator scraper (13) is arranged on the surface of the elevator transmission chain (12), and the elevator upper shaft (14) is connected with the elevator lower shaft (15) through the elevator transmission chain (12);
the suction fan comprises a suction fan shell (21), a suction fan main shaft (22), suction fan blades (23) and a crushing flail knife (24), wherein the suction fan main shaft (22) is rotatably arranged in the suction fan shell (21), the suction fan blades (23) are fixedly arranged on the suction fan main shaft (22), and the crushing flail knife (24) is fixedly arranged on the suction fan main shaft (22) on one side of the suction fan blades (23);
the shell (11) of the elevator (1) is provided with a fruit ear inlet which is arranged above the lower shaft (15) of the elevator, the suction fan shell (21) is provided with an air suction opening and an air outlet, the air suction opening is arranged opposite to the suction fan blades (23), the air outlet is arranged opposite to the crushing flail knife (24), the air suction opening is communicated with the shell (11), and the air outlet faces the outer side of the elevator (1);
a beam outlet is further formed in the shell (11) of the elevator (1), the blower (3) is fixedly arranged below the elevator (1), and the blowing port of the blower (3) and the beam outlet face in the same direction;
the secondary stem pulling machine (4) comprises a straw guide rod (41) and a secondary stem pulling rod (42), one end of the straw guide rod (41) is connected with a beam outlet on the shell (11) of the elevator (1), and one end of the straw guide rod (41) is connected with the secondary stem pulling rod (42);
the peeling machine (5) comprises a peeling frame (51) and a peeling roller (52), the peeling frame (51) is arranged below the secondary stem pulling machine (4), the peeling roller (52) is rotatably arranged on the peeling frame (51), one end, far away from the elevator (1), of the peeling frame (51) is provided with a fruit ear outlet, and the bottom of the peeling frame (51) is provided with a blanking port;
seed grain recoverer (6) retrieve frame (61) including seed grain, and sieve (62) are retrieved to seed grain and recovery fan (63), seed grain is retrieved frame (61) and is fixed to be set up the below of peeler (5), seed grain is retrieved sieve (62) and is set up inside seed grain recovery frame (61), it sets up to retrieve fan (63) the below of sieve (62) is retrieved to seed grain.
2. The corn harvester fan device according to claim 1, wherein the plurality of the suction fan blades (23) are provided, each suction fan blade (23) comprises a blade bottom plate (231) and two blade reinforcing plates (232), the blade bottom plate (231) is fixedly arranged on the suction fan main shaft (22), and the two blade reinforcing plates (232) are oppositely arranged on two sides of the blade bottom plate (231).
3. The corn harvester fan device of claim 2, wherein a top of the blade reinforcement plate (232) is bent away from the blade base plate (231).
4. The corn harvester fan device of claim 1, wherein the crushing flail knife (24) comprises a plurality of crushing blades (241) and a plurality of crushing knife bases (242), the plurality of crushing knife bases (242) are arranged around the suction fan main shaft (22), one end of each of the plurality of crushing knife bases (242) is fixedly arranged on the suction fan main shaft (22), and the other end of each of the plurality of crushing knife bases (242) is fixedly connected with the corresponding crushing blade (241).
5. The corn harvester fan device according to claim 4, wherein the suction fan (2) further comprises a fixing ring (25), and the other ends of the plurality of crushing blade seats (242) are fixedly connected through the fixing ring (25).
6. The corn harvester fan device of claim 1, further comprising an oil injector fixedly disposed at a junction of the suction fan (2) and the elevator (1).
7. The corn harvester fan device of claim 1, wherein the suction fan housing (21) comprises a first housing (211) and a second housing (212) arranged side by side, the suction fan main shaft (22) rotatably penetrates through the first housing (211) and the second housing (212), the first housing (211) and the second housing (212) are communicated, the suction fan blades (23) are fixedly arranged in the first housing (211), and the crushing flail knife (24) is fixedly arranged in the second housing (212).
8. The corn harvester fan device of claim 7, wherein the first housing (211) and the second housing (212) are relatively rotatable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920844185.2U CN210275137U (en) | 2019-06-05 | 2019-06-05 | Fan device of corn harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920844185.2U CN210275137U (en) | 2019-06-05 | 2019-06-05 | Fan device of corn harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210275137U true CN210275137U (en) | 2020-04-10 |
Family
ID=70072574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920844185.2U Expired - Fee Related CN210275137U (en) | 2019-06-05 | 2019-06-05 | Fan device of corn harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210275137U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112913467A (en) * | 2021-02-05 | 2021-06-08 | 常州常发重工科技有限公司 | Corn harvester |
| CN113632635A (en) * | 2021-07-23 | 2021-11-12 | 河北英虎农业机械股份有限公司 | Corn ear lifting system and corn harvester thereof |
| CN116982471A (en) * | 2023-07-12 | 2023-11-03 | 九方泰禾国际重工(青岛)股份有限公司 | Ear separating mechanism and corn harvester |
| CN117280940A (en) * | 2023-11-02 | 2023-12-26 | 山东钧湃智能农业装备有限公司 | Impurity removing device for corn harvester |
-
2019
- 2019-06-05 CN CN201920844185.2U patent/CN210275137U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112913467A (en) * | 2021-02-05 | 2021-06-08 | 常州常发重工科技有限公司 | Corn harvester |
| CN113632635A (en) * | 2021-07-23 | 2021-11-12 | 河北英虎农业机械股份有限公司 | Corn ear lifting system and corn harvester thereof |
| CN116982471A (en) * | 2023-07-12 | 2023-11-03 | 九方泰禾国际重工(青岛)股份有限公司 | Ear separating mechanism and corn harvester |
| CN116982471B (en) * | 2023-07-12 | 2024-05-14 | 九方泰禾国际重工(青岛)股份有限公司 | Corn harvester |
| CN117280940A (en) * | 2023-11-02 | 2023-12-26 | 山东钧湃智能农业装备有限公司 | Impurity removing device for corn harvester |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200410 |