CN214338711U - Full hydraulic drive flexible ear-picking corn header suitable for relay intercropping of beans - Google Patents
Full hydraulic drive flexible ear-picking corn header suitable for relay intercropping of beans Download PDFInfo
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- CN214338711U CN214338711U CN202023312210.4U CN202023312210U CN214338711U CN 214338711 U CN214338711 U CN 214338711U CN 202023312210 U CN202023312210 U CN 202023312210U CN 214338711 U CN214338711 U CN 214338711U
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Abstract
The utility model provides a flexible ear of grain corn header of plucking of full hydraulic drive suitable for jade bean intercropping, which comprises a frame, be provided with hydraulic motor in the frame, the flexible ear of grain assembly of plucking that frame the place ahead set up passes through transmission system and hydraulic motor and links to each other, it is provided with to dial corn stalk and ear of grain to the reel chain assembly of plucking the ear of grain assembly to pluck ear of grain assembly top, it includes flexible ear of grain board assembly to pluck the ear of grain assembly, be provided with breach or clearance that corn stalk passed through between the flexible ear of grain board assembly of plucking, flexible ear of grain board assembly below is provided with the stalk-pulling roller assembly of the corn stalk of pulling downwards, flexible ear of grain assembly rear of plucking is provided with the auger assembly and constitutes transport connection rather than, the auger assembly rear is provided with ear of grain transport device, auger assembly below is equipped with straw reducing mechanism, auger assembly axle core direction level and perpendicular to moving direction, pluck the bilateral symmetry of ear of grain assembly at moving direction and arrange. The header is integrally in a concave symmetrical structure.
Description
Technical Field
The patent of the utility model relates to a corn kernel harvester technical field is a full hydraulic drive flexibility is plucked ear of grain maize header suitable for intercropping of jade beans particularly.
Background
In the current domestic corn-soybean intercropping mode, the field configuration of corn and soybean generally adopts two lines of corn +2～And 4 rows of soybean planting modes. The corn harvesting usually adopts two lines of narrow corn harvesters to harvest, the corn harvesting efficiency is low, and the machine harvesting automation degree is not high. Because the height difference between soybean plants and corn plants is large, the requirements for mature harvest of crops are different, and it is difficult to harvest two crops simultaneously by adopting one harvester. In order to improve the corn harvesting efficiency of a corn and soybean strip composite planting mode and reduce the damage rate and the grain dropping rate of a corn ear machine, a full-hydraulic drive flexible ear picking corn header suitable for jade bean intercropping is urgently needed, so that the development of the corn-soybean planting industry can be better promoted. .
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a full hydraulic drive's flexible ear of grain header of plucking in high ground clearance realizes full hydraulic drive, control, and the ear of grain is plucked in the flexibility, improves machine harvesting efficiency, reduces corn ear damage rate and falls the grain rate.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a full-hydraulic-drive flexible corncob picking corn header suitable for jade and bean intercropping comprises a frame, wherein a hydraulic motor is arranged on the frame, a flexible corncob picking assembly arranged in front of the frame is connected with the hydraulic motor through a transmission system, a corncob pulling chain assembly for pulling cornstalks and corncobs to the corncob picking assembly is arranged above the corncob picking assembly, the corncob picking assembly comprises a flexible corncob picking plate assembly, gaps or gaps through which the cornstalks pass are formed between the flexible corncob picking plate assemblies, a corncob pulling roller assembly for pulling the cornstalks downwards is arranged below the flexible corncob picking plate assembly, an auger assembly is arranged behind the flexible corncob picking assembly and is connected with the flexible corncob picking plate assembly in a conveying mode, a corncob conveying device is arranged behind the auger assembly, a straw smashing device is arranged below the auger assembly, the axial direction of the auger assembly is horizontal and perpendicular to the moving direction, and the corncob picking assembly is symmetrically arranged on two sides of the moving direction. The header is integrally in a concave symmetrical structure, is driven by double hydraulic motors, and can be lifted, adjusted in distance between the stalk pulling rollers and controlled in rotating speed of the hydraulic motors through a hydraulic control system. When the combine harvester runs in the field, the clearance hole between two adjacent stalk pulling rollers is aligned with the corn straw, the harvester drives the stalk pulling rollers to move forwards and pull the corn straw into the clearance between the rollers, after the corn ear is contacted with the ear picking plate, the corn ear is driven to be separated from the straw under the resistance action of the stalk pulling rollers, the picked corn is stirred backwards by the single-chain stalk pulling device to enter the auger mechanism, and the auger mechanism gathers the corn ear towards the middle and conveys the corn ear backwards to the ear conveying device.
The frame is provided with a header lifting device which drives the header lifting device to move up and down. The header lifting device is completed by a pair of hydraulic cylinders, and a distance measuring sensor is integrated on the hydraulic cylinders, so that the height of the header from the ground can be measured, and data can be displayed on a display. When the header needs to be lifted and lowered, the 1YA and the 12YA (2YA and 11YA) simultaneously obtain action signals, the oil cylinder starts to act, and the header starts to ascend and descend. Is convenient for adapting to different corn heights.
An organic shell is arranged on the outer side of the ear picking assembly. Prevent the corn leaf stems from entering the snapping assembly.
The reel chain assembly comprises a reel chain, the reel chain and the symmetrical center of the harvester form a splayed shape with a large front end spacing and a small rear end spacing and perform closing-in type movement, and the flexible ear picking plate assembly is arranged below the rear end of the splayed shape of the flexible reel belt. The stem-pulling roller is matched with the flexible ear picking plate, so that damage reduction and ear picking can be realized. The single-chain reel device can realize the harvesting of the corn in the ultra-narrow row.
And a tension wheel and a driving wheel are respectively arranged at the front end and the rear end of the reel chain, and a driven wheel is arranged between the tension wheel and the driving wheel.
The stem drawing roller assembly comprises a star-shaped roller body with the roller core direction consistent with the moving direction, the star-shaped roller body is installed on the rack through a roller body fixing device, a stem drawing roller adjusting oil cylinder for adjusting the distance between the two star-shaped roller bodies is arranged at the front end of the star-shaped roller body and is a spiral guide head, and the front section of the star-shaped roller body is provided with a 5-tooth structure. The distance between the stalk-pulling rollers is adjusted by changing the stroke of the hydraulic oil cylinder. The stem-drawing roller adjusting oil cylinder is integrated with a displacement sensor, can detect the stroke change of the oil cylinder and converts the stroke change into the distance change of the stem-drawing roller through the central processor. Taking the left stalk-pulling roll adjusting oil cylinder as an example, when the stalk-pulling roll interval needs to be changed, 3YA (4YA) obtains an action signal, the oil cylinder starts to act, and the stalk-pulling roll interval is reduced and increased. The oil cylinder is provided with a limiting device to protect the stalk-pulling roller from interfering with the frame. The left and right side hydro-cylinders can move independently, also can move simultaneously, increases the adaptability of header. The front end of the stalk-pulling roller is provided with a conical guide head, and the guide head is provided with spiral patterns which are beneficial to the corn straws to enter the clearance of the stalk-pulling roller. The two adjacent stalk-pulling rollers have the same rotating speed and the opposite rotating direction.
The flexible ear picking plate assembly comprises a plate body, wherein the outer side plate of the plate body is hinged to a frame, the inner side plate of the plate body is provided with a cage-type flexible buffer wheel along the upper direction, a spring is arranged between the lower side of the plate body and the frame, a limiting block is further arranged below the plate body, and the cage-type flexible buffer wheel is covered with a fine steel wire mesh. When the corn ear contacts the ear picking plate, the spring is compressed, and when the stress of the corn ear is larger than the connecting force between the corn ear and the straw, the corn ear is picked. When the corn ear is picked off, the spring can reset and bounce the ear. The corn ears move backwards under the action of the single-chain reel device.
The screw feeder assembly comprises a screw feeder rotating shaft, and a screw feeder main body and a rotating speed monitoring sensor for monitoring the rotating speed of the screw feeder are arranged on the screw feeder rotating shaft. The rotational speed monitoring sensor transmits monitoring data to the central processor and outputs the monitoring data to the display, so that a driver can visually monitor the operation condition of the header. The screw feeder can be divided into three working states of normal, deceleration and stop according to the motion state of the screw feeder.
The transmission system comprises a safety coupling connected with a hydraulic motor and double rows of roller chains connected with the snapping assemblies which are symmetrically arranged.
The straw smashing device comprises a cutter cage, a rotating shaft of the cutter cage is provided with a rotating shaft speed monitoring sensor, and the rotating shaft is connected with a transmission system through a driving chain wheel. The straw crushing device is powered by chain transmission, the rotating shaft speed monitoring sensor can monitor the rotating shaft speed in real time, and when the rotating shaft speed is sharply reduced or suddenly set to zero, a power cut-off signal is sent out and the operation of the hydraulic motor is stopped.
The hydraulic system can be controlled through the central controller, data are collected through the displacement sensor, actual actions of the oil cylinder are converted into data to be reflected on the display screen, and touch control over the hydraulic system can be achieved. The hydraulic control system can control the header working mode selection, and can realize the respective operation of the header at the left side and the header at the right side, namely single-side operation, double-side synchronous operation and double-side asynchronous operation, which are three working modes in total.
The utility model has the advantages that: the full hydraulic drive and control are realized, the ears are flexibly picked, the machine harvesting efficiency is improved, and the damage rate and the grain dropping rate of the corn ears are reduced.
Drawings
FIG. 1 is a top view of the present solution;
FIG. 2 is a side view of the present solution;
FIG. 3 is a cross-sectional view of the present solution;
FIG. 4 is a schematic structural view of a flexible ear picking plate assembly according to the present embodiment;
FIG. 5 is a schematic view of the stem-pulling roller assembly of the present embodiment;
FIG. 6 is a schematic view of the auger assembly of the present embodiment;
FIG. 7 is a schematic view of the crushing apparatus according to the present embodiment; (ii) a
FIG. 8 is a schematic view of a multi-hydraulic system according to the present embodiment
FIG. 9 is a schematic view of the multi-sensor monitoring system of the present solution;
1. a transmission system; 111. a safety coupling; 112. double rows of roller chains; 121. a first drive chain 122, a first drive sprocket 123, a second drive sprocket; 2. a body housing; 3. a flexible ear picking assembly; 311. a reel chain driving wheel; 312. a reel chain tension wheel; 313. a reel chain driven wheel; 314. a reel chain; 321. a star-shaped roller body; 322. a roller body fixing device; 323. a spiral guide head; 324. a stalk-pulling roller adjusting oil cylinder; 331. picking the ear plate bracket; 332. a spring mount; 333. a cage-type flexible buffer wheel; 334. a spring; 335. a limiting block; 4. an auger assembly; 401. a screw conveyor rotating shaft; 402. a screw body; 403. a rotation speed monitoring sensor; 5. A hydraulic motor; 6. a frame; 7. a cluster transport device; 8. a straw crushing device; 801. a knife cage; 802. a rotation speed monitoring sensor; 803. a rotating shaft; 804. a drive sprocket; 9. header elevating gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to the schematic illustrations of figures 1-9,
a full hydraulic drive flexible ear picking corn header suitable for jade and bean intercropping comprises a frame 6, a hydraulic motor 5 is arranged on the frame 6, a flexible ear picking assembly 3 arranged in front of the frame 6 is connected with the hydraulic motor 5 through a transmission system 1, a stalk shifting chain assembly 31 for shifting corn stalks and ears to the ear picking assembly 3 is arranged above the ear picking assembly 3, the ear picking assembly 3 comprises a flexible ear picking plate assembly 33, gaps or gaps for the corn stalks to pass through are arranged between the flexible ear picking plate assemblies 33, a stalk pulling roller assembly 32 for pulling the corn stalks downwards is arranged below the flexible ear picking plate assembly 33, an auger assembly 4 is arranged behind the flexible ear picking assembly 3 and is connected with the auger assembly in a conveying way, an ear conveying device 7 is arranged behind the auger assembly 4, a straw crushing device 8 is arranged below the auger assembly 4, the auger assembly 4 is horizontal in the axial core direction and vertical to the moving direction, the ear picking assemblies 3 are symmetrically arranged at two sides of the moving direction. The header is integrally in a concave symmetrical structure, is driven by the double hydraulic motors 5, and can be lifted, the spacing of the stalk-pulling rollers and the rotating speed of the hydraulic motors 5 can be controlled by a hydraulic control system. When the combine harvester runs in the field, the clearance hole between two adjacent stalk pulling rollers is aligned with the corn stalks, the harvester drives the stalk pulling rollers to move forwards and pull the corn stalks into the clearance between the stalk pulling rollers, after the corn ears are contacted with the ear picking plate 33, the corn ears are driven to be separated from the stalks under the resistance action of the stalk pulling rollers, then the picked corns are stirred backwards by the single-chain stalk pulling device 31 to enter the auger mechanism 4, and the auger mechanism 4 gathers the corn ears towards the middle and conveys the corn ears backwards to the ear conveying device 7.
The frame 6 is provided with a header lifting device 9 which drives the header lifting device to move up and down. The header lifting device is completed by a pair of hydraulic oil cylinders 9, and a distance measuring sensor is integrated on the hydraulic oil cylinders, so that the height of the header from the ground can be measured, and data can be displayed on a display. When the header needs to be lifted and lowered, the 1YA and the 12YA (2YA and 11YA) simultaneously obtain action signals, the oil cylinder starts to act, and the header starts to ascend and descend. Is convenient for adapting to different corn heights.
The outer side of the ear picking assembly 3 is provided with an organic shell 2. Preventing the corn leaf stalks from entering the snapping assembly 3.
The reel chain assembly 31 comprises a reel chain 314, the reel chain 314 and the symmetrical center of the harvester form a splayed shape with a large front end spacing and a small rear end spacing and perform closing movement, and the flexible ear picking plate assembly 33 is arranged below the splayed rear end of the flexible reel belt. The stem-pulling roller is matched with the flexible ear picking plate, so that damage reduction and ear picking can be realized. The single-chain reel device can realize the harvesting of the corn in the ultra-narrow row.
The front and rear ends of the reel chain 314 are respectively provided with a tension pulley 312 and a driving pulley 311, and a driven pulley 313 is arranged between the tension pulley 312 and the driving pulley 311.
The stem drawing roller assembly 32 comprises star-shaped roller bodies 321 with the roller core directions consistent with the moving direction, the star-shaped roller bodies 321 are installed on the frame 6 through roller body fixing devices 322, the front ends of the star-shaped roller bodies 321 are spiral guide heads 323, stem drawing roller adjusting cylinders 324 for adjusting the distance between the two star-shaped roller bodies 321 are arranged at the front sections of the star-shaped roller bodies 321, and the stem drawing roller assembly 32 is of a 5-tooth structure. The distance between the stalk-pulling rollers is adjusted by changing the stroke of the hydraulic oil cylinder 324. A displacement sensor is integrated on the stem-roller adjusting cylinder 324, which can detect the change of the cylinder stroke and convert it into the change of the stem-roller spacing by the central processor. Taking the left stalk-pulling roll adjusting oil cylinder as an example, when the stalk-pulling roll interval needs to be changed, 3YA (4YA) obtains an action signal, the oil cylinder starts to act, and the stalk-pulling roll interval is reduced and increased. The oil cylinder is provided with a limiting device to protect the stalk-pulling roller from interfering with the frame 6. The left and right side hydro-cylinders can move independently, also can move simultaneously, increases the adaptability of header. The front end of the stalk-pulling roller is provided with a conical guide head, and the guide head is provided with spiral patterns which are beneficial to the corn straws to enter the clearance of the stalk-pulling roller. The two adjacent stalk-pulling rollers have the same rotating speed and the opposite rotating direction.
The flexible ear picking plate assembly 33 comprises a plate body 331, wherein the outer side plate edge of the plate body 331 is hinged to the frame, the inner side plate edge of the plate body 331 is provided with a cage-type flexible buffer wheel 333, a spring 334 is arranged between the lower side of the plate body 331 and the frame 6, a limiting block 335 is further arranged below the plate body 331, and the cage-type flexible buffer wheel 333 is covered with a fine steel wire mesh. When the corn ear contacts the ear picking plate 33, the spring 334 is compressed, and when the stress of the corn ear is larger than the connecting force between the corn ear and the straw, the corn ear is picked. When the ear of corn is removed, the spring 334 will return and spring the ear. The corn ears move backwards under the action of the single-chain reel device 31.
The auger assembly 4 comprises an auger rotating shaft 401, and an auger main body 402 and a rotating speed monitoring sensor 403 for monitoring the rotating speed of the auger are arranged on the auger rotating shaft 401. The rotation speed monitoring sensor 403 transmits the monitoring data to the central processor and outputs the monitoring data to the display, so that a driver can visually monitor the operation condition of the header. The screw feeder can be divided into three working states of normal, deceleration and stop according to the motion state of the screw feeder.
The transmission system 1 comprises a safety coupling 111 connected with the hydraulic motor 5 and a double-row roller chain 112 connected with the snapping assemblies 3 which are symmetrically arranged.
The straw crushing device 8 comprises a cutter cage 801, a rotating shaft 803 of the cutter cage 801 is provided with a rotating shaft speed monitoring sensor 802, and the rotating shaft 803 is connected with the transmission system 1 through a driving chain wheel 804. The power is provided for the straw smashing device through chain transmission, the rotating shaft speed monitoring sensor 502 can monitor the rotating shaft speed in real time, and when the rotating shaft speed is sharply reduced or suddenly set to zero, a power cut-off signal is sent out, and the operation of the hydraulic motor is stopped.
The hydraulic system can be controlled through the central controller, data are collected through the displacement sensor, actual actions of the oil cylinder are converted into data to be reflected on the display screen, and touch control over the hydraulic system can be achieved. The hydraulic control system can control the header working mode selection, and can realize the respective operation of the header at the left side and the header at the right side, namely single-side operation, double-side synchronous operation and double-side asynchronous operation, which are three working modes in total.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only, and various modifications, additions and substitutions as described for the specific embodiments described herein may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (10)
1. A full hydraulic drive flexible ear picking corn header suitable for jade and bean intercropping is characterized by comprising a rack (6), a hydraulic motor (5) is arranged on the rack (6), a flexible ear picking assembly (3) arranged in front of the rack (6) is connected with the hydraulic motor (5) through a transmission system (1), a seedling pulling chain assembly (31) for pulling corn stalks and ears to the ear picking assembly (3) is arranged above the ear picking assembly (3), the ear picking assembly (3) comprises a flexible ear picking plate assembly (33), gaps or gaps through which the corn stalks pass are arranged between the flexible ear picking plate assembly (33), a stalk pulling roller assembly (32) for pulling the corn stalks downwards is arranged below the flexible ear picking plate assembly (33), an auger assembly (4) is arranged behind the flexible ear picking assembly (3) and is in conveying connection with the auger assembly, and an ear conveying device (7) is arranged behind the auger assembly (4), straw smashing devices (8) are arranged below the auger assembly (4), the axial core direction of the auger assembly (4) is horizontal and perpendicular to the moving direction, and the ear picking assemblies (3) are symmetrically arranged on two sides of the moving direction.
2. A fully hydraulically driven flexible snapping corn header suitable for use in jade-bean intercropping according to claim 1, wherein the frame (6) is provided with a header lifting device (9) that drives it up and down.
3. The all-hydraulic drive flexible snapping corn header suitable for the green pea intercropping according to claim 1, wherein an organic shell (2) is arranged outside the snapping assembly (3).
4. The all-hydraulic drive flexible corncob picking corn header suitable for the jade bean intercropping of claim 1, wherein the grain pulling chain assembly (31) comprises a grain pulling chain (314), the grain pulling chain (314) and a symmetrical center of the harvester form a splayed shape with a large front end distance and a small rear end distance, and perform closing-in type movement, and the flexible corncob picking plate assembly (33) is arranged below the rear end of the splayed shape of the flexible grain pulling belt.
5. The all-hydraulic drive flexible corn ear picking header suitable for the green bean intercropping of claim 4, characterized in that the front and back ends of the reel chain (314) are respectively provided with a tension wheel (312) and a driving wheel (311), and a driven wheel (313) is arranged between the tension wheel (312) and the driving wheel (311).
6. A full hydraulic drive flexible corn harvesting table suitable for jade bean intercropping according to claim 1, wherein the stem pulling roller assembly (32) comprises a star-shaped roller body (321) with a roller core direction consistent with a moving direction, the star-shaped roller body (321) is installed on the frame (6) through a roller body fixing device (322), the front end of the star-shaped roller body (321) is a spiral guide head (323), the front section of the star-shaped roller body (321) is provided with a stem pulling roller adjusting cylinder (324) for adjusting the distance between the two star-shaped roller bodies (321), and the stem pulling roller assembly (32) is of a 5-tooth structure.
7. A fully hydraulic drive flexible ear-picking corn header suitable for use in the relay intercropping of beans as claimed in claim 1, wherein the flexible ear-picking plate assembly (33) comprises a plate body (331), the outer side edge of the plate body (331) is hinged to the frame, the inner side edge of the plate body (331) is provided with a cage-type flexible buffer wheel (333), a spring (334) is arranged between the lower side of the plate body (331) and the frame (6), a limit block (335) is further arranged below the plate body (331), and the cage-type flexible buffer wheel (333) is covered with a fine steel wire mesh.
8. The all-hydraulic drive flexible corncob picking corn header suitable for jade bean intercropping according to claim 1, wherein the auger assembly (4) comprises an auger rotating shaft (401), and an auger main body (402) and a rotating speed monitoring sensor (403) for monitoring the rotating speed of the auger are arranged on the auger rotating shaft (401).
9. A fully hydraulically driven flexible snapping corn header suitable for green bean intercropping according to claim 1, wherein the transmission system (1) comprises a safety coupling (111) connected to a hydraulic motor (5), double rows of roller chains (112) connecting symmetrically arranged snapping assemblies (3).
10. The all-hydraulic drive flexible snapping corn header suitable for green bean intercropping according to claim 1, wherein the straw smashing device (8) comprises a cutter cage (801), a rotating shaft (803) of the cutter cage (801) is provided with a rotating shaft speed monitoring sensor (802), and the rotating shaft (803) is connected with the transmission system (1) through a driving chain wheel (804).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023312210.4U CN214338711U (en) | 2020-12-31 | 2020-12-31 | Full hydraulic drive flexible ear-picking corn header suitable for relay intercropping of beans |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023312210.4U CN214338711U (en) | 2020-12-31 | 2020-12-31 | Full hydraulic drive flexible ear-picking corn header suitable for relay intercropping of beans |
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| CN214338711U true CN214338711U (en) | 2021-10-08 |
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|---|---|---|---|
| CN202023312210.4U Expired - Fee Related CN214338711U (en) | 2020-12-31 | 2020-12-31 | Full hydraulic drive flexible ear-picking corn header suitable for relay intercropping of beans |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115191217A (en) * | 2022-06-21 | 2022-10-18 | 山东省农业机械科学研究院 | Synchronous soybean and corn combine harvester and working method thereof |
| CN116210446A (en) * | 2022-12-28 | 2023-06-06 | 西南大学 | Small self-propelled corn cob picking machine |
-
2020
- 2020-12-31 CN CN202023312210.4U patent/CN214338711U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115191217A (en) * | 2022-06-21 | 2022-10-18 | 山东省农业机械科学研究院 | Synchronous soybean and corn combine harvester and working method thereof |
| CN115191217B (en) * | 2022-06-21 | 2024-04-05 | 山东省农业机械科学研究院 | Synchronous soybean and corn combine harvester and working method thereof |
| CN116210446A (en) * | 2022-12-28 | 2023-06-06 | 西南大学 | Small self-propelled corn cob picking machine |
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