Screening mechanism for corn harvester
By designing a screening mechanism with a single-axis bidirectional rotating blade and spiral screen structure on the corn harvester, the problem of the inability to completely screen corn leaves and corn cobs in the prior art is solved, and efficient corn collection and screening is achieved, reducing waste and equipment blockage.
Patent Information
- Application Number
- CN202422023300.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The screening mechanism of the existing corn harvester cannot completely and thoroughly screen corn leaves and corn cobs, resulting in the corn kernels being transported with the leaves, causing waste.
A screening mechanism for corn harvesters is designed, adopting a single-axis bidirectional rotating blade design and a spiral screen structure, which collects corn through bidirectional rotating blades and separates corn kernels and leaves using spiral screens.
It effectively improves the corn collection speed and screening efficiency, reduces the waste of corn kernels, avoids equipment blockage, and simplifies the corn kernel recycling process.
Smart Images
Figure CN222897658U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of corn harvesters, in particular to a screening mechanism for a corn harvester. Background Technique
[0002] A corn harvester is an agricultural machinery that can complete multiple operations such as ear picking, stacking, and straw returning to the field at one time when the corn is ripe; the technological process: the corn harvester picks the ears when the corn is in a growing state. Under the action of the ear picking rollers and the ear picking plates, the ear stalks are broken; due to the height difference between the inner and outer picking rollers, the ears fall into the ear box, and when the ear box is full, the box is opened for stacking; the high-speed rotating cutter cuts the straw from the root and then enters the crushing mechanism to be cut into pieces 3 to 5 centimeters long, and the cut straw naturally falls to the ground; then the ears are transported to the field, peeled by a peeling machine, and threshed after drying.
[0003] However, for the screening mechanism of the currently used corn harvester, when the corn harvester is harvesting, the corn leaves and the corn cobs cannot be completely and thoroughly screened, and it is easy to be transported together. During transportation, due to the large area of the leaves blocking, the scattered corn kernels are easily discharged together, resulting in waste.
[0004] In view of this, in order to study and improve the existing problems, a screening mechanism for a corn harvester is provided, which has a reasonable structural design, integrates good screening effect, waste reduction, and non-clogging, reduces manpower and material resources, and greatly improves the working efficiency. The purpose is to solve the problems and improve the practical value through this technology. Content of the Utility Model
[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a screening mechanism for a corn harvester is proposed.
[0006] To achieve the above object, the utility model adopts the following technical solutions: A screening mechanism for a corn harvester, including a main body frame, one side of the main body frame is movably connected with a side plate, a main shaft is arranged on the inner wall of the main body frame, a first rotating blade is arranged on the outer wall of the main shaft, a second rotating blade is arranged on one side of the first rotating blade, a movable plate is movably connected to the outer wall of the main body frame, a hinge is movably connected to the outer wall of the movable plate, a cutting table is arranged on one side of the side plate, a connection port is arranged on the inner wall of the main body frame, a conveying device is movably connected to the outer wall of the connection port, an arc plate is arranged at the bottom of the main shaft, a feeding port is arranged at the top of the arc plate, a recycling box is movably connected to the bottom of the arc plate, a screening barrel is arranged inside the recycling box, a rotating rod is arranged inside the screening barrel, a first spiral screen is fixedly connected to the outer wall of the rotating rod, a second spiral screen is arranged at the bottom of the first spiral screen, a first discharge chamber is arranged inside the recycling box, a second discharge chamber is arranged at the bottom of the first discharge chamber, a discharge pipe is arranged at the bottom of the screening barrel, a driving motor is arranged at the bottom of the rotating rod, a baffle is fixedly connected to the outer wall of the rotating rod, a first outlet is arranged on one side of the first spiral screen, and a second outlet is arranged on one side of the second spiral screen.
[0007] As a further description of the above technical solution:
[0008] Both the first rotating blade and the second rotating blade are located on the outer wall of the main shaft. The first rotating blade is located on the left side of the main shaft, and the second rotating blade is located on the right side of the main shaft. The first rotating blade is arranged in a right-handed manner, and the second rotating blade is arranged in a left-handed manner.
[0009] As a further description of the above technical solution:
[0010] The driving motor, the first spiral screen, the second spiral screen, the rotating rod, and the screening barrel form a screening structure, and the apertures of the first spiral screen and the second spiral screen are different.
[0011] As a further description of the above technical solution:
[0012] A valve is arranged on the outer wall of the discharge pipe. The discharge pipe is located at the bottom of the screening barrel, and the outer diameter size of the discharge pipe matches the inner diameter size of the bottom opening of the recycling box.
[0013] As a further description of the above technical solution:
[0014] One side of the bottom of the first spiral screen and the second spiral screen is fixedly connected with a baffle, and the distance between the baffle and the inner wall of the screening barrel is about three to four millimeters.
[0015] As a further description of the above technical solution:
[0016] The movable plate and the main body frame are connected by hinges, and the number of hinges is two groups.
[0017] The utility model has the following beneficial effects:
[0018] In the utility model, by combining good screening effect, reducing waste, not being easily blocked, etc., the screening efficiency of the screening mechanism of the corn harvester is greatly improved. While conveying corn, through the design of the conveying blades with a single-shaft bidirectional setting, the corn is rotated and gathered towards the middle part from two directions at the same time, shortening the travel of all the corn on both sides when being gathered. Under the condition that other conditions remain unchanged, the gathering speed of the corn is greatly improved, greatly improving the efficiency and at the same time relieving the conveying and discharging pressure at the connection with the elevator, realizing the function of single-shaft bidirectional gathering and improving the gathering efficiency so as to avoid corn congestion. In addition, during spiral conveying, the bottom screen can screen corn leaves and corn kernels, preventing the corn kernels from being scraped out together with the leaves and causing waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of a screening mechanism for a corn harvester proposed by the utility model;
[0020] Figure 2 It is a schematic diagram of a partial structure of a screening mechanism for a corn harvester proposed by the utility model;
[0021] Figure 3 It is a schematic diagram of the inside of the recycling box of a screening mechanism for a corn harvester proposed by the utility model;
[0022] Figure 4 It is a schematic diagram of the side of the screening barrel of a screening mechanism for a corn harvester proposed by the utility model.
[0023] Legend:
[0024] 1. Main body frame; 2. Side plate; 3. Main shaft; 4. First rotating blade; 5. Second rotating blade; 6. Movable plate; 7. Hinge; 8. Cutting table; 9. Connection port; 10. Conveying device; 11. Arc plate; 12. Feeding port; 13. Recycling box; 14. Screening barrel; 15. Rotating rod; 16. First spiral screen; 17. Second spiral screen; 18. First discharge cavity; 19. Second discharge cavity; 20. Discharge pipe; 21. Driving motor; 22. Baffle; 23. First outlet; 24. Second outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] Refer to Figures 1-4, an embodiment provided by the present utility model: a screening mechanism for a corn harvester, including a main body frame 1, a side plate 2 is movably connected to one side of the main body frame 1, a main shaft 3 is arranged on the inner wall of the main body frame 1, a first rotating blade 4 is arranged on the outer wall of the main shaft 3, a second rotating blade 5 is arranged on one side of the first rotating blade 4, and it rotates bidirectionally on a single shaft, shortening the conveying distance of the corn, saving time, and at the same time avoiding blockage caused by single - shaft unidirectional rotation. An activity plate 6 is movably connected to the outer wall of the main body frame 1, and a hinge 7 is movably connected to the outer wall of the activity plate 6, which is convenient for collecting the recycled corn kernels later and reducing waste. A cutting table 8 is arranged on one side of the side plate 2, a connection port 9 is arranged on the inner wall of the main body frame 1, a conveying device 10 is movably connected to the outer wall of the connection port 9, an arc - shaped plate 11 is arranged at the bottom of the main shaft 3, a feeding port 12 is arranged at the top of the arc - shaped plate 11, a recycling box 13 is movably connected to the bottom of the arc - shaped plate 11, a screening barrel 14 is arranged inside the recycling box 13, a rotating rod 15 is arranged inside the screening barrel 14, a first spiral screen 16 is fixedly connected to the outer wall of the rotating rod 15, a second spiral screen 17 is arranged at the bottom of the first spiral screen 16, for stratifying and screening corn kernels of different sizes. A first discharge cavity 18 is arranged inside the recycling box 13, a second discharge cavity 19 is arranged at the bottom of the first discharge cavity 18, a discharge pipe 20 is arranged at the bottom of the screening barrel 14, for discharging the corn kernels from the inside, which is convenient for the staff to recycle. A driving motor 21 is arranged at the bottom of the rotating rod 15, a baffle 22 is fixedly connected to the outer wall of the rotating rod 15, a first outlet 23 is arranged on one side of the first spiral screen 16, and a second outlet 24 is arranged on one side of the second spiral screen 17.
[0028] Specifically, both the first rotating blade 4 and the second rotating blade 5 are located on the outer wall of the main shaft 3. The first rotating blade 4 is located on the left side of the main shaft 3, and the second rotating blade 5 is located on the right side of the main shaft 3. The first rotating blade 4 is arranged in a right - hand helix, and the second rotating blade 5 is arranged in a left - hand helix. Rotating bidirectionally on a single shaft shortens the conveying distance of the corn, saves the conveying time, and at the same time avoids the problem of blockage that is easily caused by single - shaft unidirectional rotation.
[0029] Specifically, the driving motor 21, the first spiral screen 16, the second spiral screen 17, the rotating rod 15, and the screening barrel 14 form a screening structure. The apertures of the first spiral screen 16 and the second spiral screen 17 are different, for stratifying and screening corn kernels of different sizes of large, medium, and small, saving the time consumption of manual screening by the staff and being more convenient to use.
[0030] Specifically, a valve is arranged on the outer wall of the discharge pipe 20. The discharge pipe 20 is located at the bottom of the screening barrel 14, and the outer diameter size of the discharge pipe 20 matches the inner diameter size of the bottom opening of the recycling box 13, which is convenient for discharging small - particle corn kernels and avoiding accumulation and inability to discharge inside the screening barrel 14, causing equipment damage.
[0031] Specifically, on one side of the bottom of the first spiral screen 16 and the second spiral screen 17, there is a fixed connection with a baffle 22. The distance between the baffle 22 and the inner wall of the screening barrel 14 is about three to four millimeters, which not only blocks the corn kernels but also avoids being too close to the inner wall of the screening barrel 14, thus preventing friction with the inner wall and causing damage to the equipment.
[0032] Specifically, the movable plate 6 is connected to the main body frame 1 through hinges 7, and the number of hinges 7 is two groups, which facilitates the subsequent users to open and close the movable plate 6 to recycle the corn kernels collected inside.
[0033] Working principle: When in use, the cutting table 8 harvests corn and conveys it into the main body frame 1. The main shaft 3 starts to rotate under the action of the driving motor 21 on the left outer wall of the main body frame 1. The first rotating blade 4 and the second rotating blade 5 are both located on the surface of the main shaft 3 and rotate simultaneously, but in opposite directions. During the rotation, the corn on both sides is conveyed towards the middle connection port 9. When corn kernels fall, the fallen corn kernels enter the screening barrel 14 through the feeding port 12. Then, the driving motor 21 drives the rotating rod 15 to rotate. The first spiral screen 16 screens the large - particle corn kernels, causing the large - particle corn kernels to stay on the surface of the first spiral screen 16 and be discharged into the first discharge cavity 18 through the first outlet 23 under the action of rotational centrifugal force for storage. The smaller - particle corn kernels that fall on the surface of the second spiral screen 17 are screened as described above for the first spiral screen 16 and are discharged into the second discharge cavity 19 through the second outlet 24. At the same time, the smaller - particle corn kernels pass through the screening of the second spiral screen 17 and fall to the bottom of the screening barrel 14. Finally, when the corn harvester finishes harvesting, the staff opens the movable plate 6 and the valve to take out the corn kernels of different sizes, reducing waste.
[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A screening mechanism for a corn harvester, comprising a main frame (1), characterized in that: A side plate (2) is movably connected to one side of the main frame (1); a main shaft (3) is provided on the inner wall of the main frame (1); a first rotating blade (4) is provided on the outer wall of the main shaft (3); a second rotating blade (5) is provided on one side of the first rotating blade (4); a movable plate (6) is movably connected to the outer wall of the main frame (1); a hinge (7) is movably connected to the outer wall of the movable plate (6); a cutting platform (8) is provided on one side of the side plate (2); a connecting port (9) is provided on the inner wall of the main frame (1); a conveying device (10) is movably connected to the outer wall of the connecting port (9); an arc plate (11) is provided at the bottom of the main shaft (3); a material discharge port (12) is provided at the top of the arc plate (11); a recovery box (13) is movably connected to the bottom of the arc plate (11); and the recovery box (13) is movably connected to the outer wall of the recovery box (13). A screening barrel (14) is arranged inside the collection box (13), a rotating rod (15) is arranged inside the screening barrel (14), a first spiral screen (16) is fixedly connected to the outer wall of the rotating rod (15), a second spiral screen (17) is arranged at the bottom of the first spiral screen (16), a first discharge cavity (18) is arranged inside the collection box (13), a second discharge cavity (19) is arranged at the bottom of the first discharge cavity (18), a discharge pipe (20) is arranged at the bottom of the screening barrel (14), a driving motor (21) is arranged at the bottom of the rotating rod (15), a baffle (22) is fixedly connected to the outer wall of the rotating rod (15), a first outlet (23) is arranged on one side of the first spiral screen (16), and a second outlet (24) is arranged on one side of the second spiral screen (17).
2. A screening mechanism for a corn harvester according to claim 1, characterized in that: The first rotating blade (4) and the second rotating blade (5) are both located on the outer wall of the main shaft (3); the first rotating blade (4) is located on the left side of the main shaft (3), and the second rotating blade (5) is located on the right side of the main shaft (3); the first rotating blade (4) is arranged to rotate rightward, and the second rotating blade (5) is arranged to rotate leftward.
3. The screening mechanism for a corn harvester according to claim 1, characterized in that: The driving motor (21), the first spiral screen (16), the second spiral screen (17), the rotating rod (15), and the screening barrel (14) form a screening structure, and the first spiral screen (16) and the second spiral screen (17) have different apertures.
4. A screening mechanism for a corn harvester according to claim 1, characterized in that: The outer wall of the discharge pipe (20) is provided with a valve. The discharge pipe (20) is located at the bottom of the screening barrel (14). The outer diameter of the discharge pipe (20) matches the inner diameter of the bottom opening of the recovery box (13).
5. The screening mechanism for a corn harvester according to claim 1, characterized in that: A baffle (22) is fixedly connected to one side of the bottom of the first spiral screen (16) and the second spiral screen (17), and the distance between the baffle (22) and the inner wall of the screening barrel (14) is about three to four millimeters.
6. The screening mechanism for a corn harvester according to claim 1, characterized in that: The movable plate (6) is connected to the main frame (1) via hinges (7), and the hinges (7) are provided in two sets.