A disc harrow for corn planting

Abstract

This utility model relates to the field of agricultural planting machinery technology, and discloses a disc harrow for corn planting, including a frame. A connecting frame is fixedly connected to the upper surface of the frame by bolts. A slide rail is fixedly connected to the lower surface of the frame. A rotating roller is rotatably connected to the inner side wall of the slide rail. A slider is slidably connected to the inner side wall of the slide rail. A movable rod is fixedly connected to the lower surface of the slider. A connecting barrel is fixedly connected to the inner side wall of the lower end of the movable rod. A first bearing is rotatably connected to the outer surface of the connecting barrel. A scraper is fixedly connected to the outer surface of the first bearing. A second bearing is rotatably connected to the inner side wall of the connecting barrel. A first bevel gear is fixedly connected to one side of the second bearing and to one end of the rotating roller of the disc harrow body. A rotating shaft is rotatably connected to the inner side wall of the middle part of the frame. This device has the beneficial effects of facilitating quick and easy adjustment of the spacing between adjacent disc harrow bodies and facilitating the cleaning of soil adhering to the outer surface of the disc harrow body.

Description

Technical Field

[0001] This utility model relates to the field of agricultural planting machinery technology, and more specifically, it relates to a disc harrow for corn planting. Background Technology

[0002] The disc harrow for corn planting is a type of land preparation machinery used in agricultural tillage operations. It primarily uses rotating disc blades mounted on a frame to break up the soil and level the surface, creating a suitable seedbed environment for corn planting. This device typically consists of a traction frame, main beam, disc assembly, and adjustment mechanism. During operation, the disc blades cut into the soil, using mechanical traction or power drive to break up, mix, and level the topsoil. It is widely applicable to the land preparation stage before corn planting and plays a crucial role in improving sowing quality and seedling survival rate.

[0003] Existing disc harrows have significant drawbacks in practical applications: First, traditional devices are mostly fixed directly to the frame with bolts and connecting brackets. Adjusting the disc spacing requires disassembly and reassembly using tools, making it difficult to adapt to different widths of tillage or the row spacing requirements of corn planting. Especially when frequent adjustments to the plow width are needed, repeated disassembly and reassembly are not only time-consuming and labor-intensive, but may also affect the uniformity of tillage due to installation errors, leading to inconsistent corn planting depth and reduced seed survival rate. Second, in soils with high moisture content, the disc plow blades easily adhere to soil during operation. Especially in wet tillage environments before corn planting, soil adhesion gradually increases the thickness of the discs, increasing mechanical resistance and compromising soil fragmentation precision, resulting in uneven soil clods after tillage, affecting the quality of corn planting. Furthermore, the adhered soil requires frequent manual cleaning, further reducing operational efficiency. Therefore, there is an urgent need for a disc harrow for corn planting that combines adjustable spacing and prevents soil adhesion to improve the flexibility and reliability of tillage operations. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a disc harrow for corn planting, which aims to solve the problems in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a disc harrow for corn planting, comprising a frame, a connecting bracket fixedly connected to the upper surface of the frame by bolts, a slide rail fixedly connected to the lower surface of the frame, a rotating roller rotatably connected to the inner wall of the slide rail, a slider slidably connected to the inner wall of the slide rail, a spiral groove provided on the slide rail, the slider being adapted to the spiral groove, and the slider being able to move axially along the rotating roller via the rotating roller, a movable rod fixedly connected to the lower surface of the slider, a connecting barrel fixedly connected to the inner wall of the lower end of the movable rod, a first bearing rotatably connected to the outer surface of the connecting barrel, a scraper fixedly connected to the outer ring of the first bearing, a second bearing rotatably connected to the inner wall of the connecting barrel, and a disc harrow body fixedly connected to one side of the second bearing.

[0008] The present invention is further configured such that the spiral groove includes a first spiral groove, a second spiral groove, a third spiral groove and a fourth spiral groove formed on the outer surface of the rotating roller, wherein the depth of the first spiral groove, the second spiral groove, the third spiral groove and the fourth spiral groove gradually increases, and the pitch of the first spiral groove, the second spiral groove, the third spiral groove and the fourth spiral groove gradually increases along the axial direction of the rotating roller.

[0009] The present invention is further configured such that the slider includes: a first spiral slider adapted to the first spiral groove, a second spiral slider adapted to the second spiral groove, a third spiral slider adapted to the third spiral groove, and a fourth spiral slider adapted to the fourth spiral groove.

[0010] The present invention is further configured such that an adapter groove is provided on the outer surface of the scraper, the inner sidewall of the adapter groove is slidably connected to the outer surface of the disc rake body, and a spring damper is fixedly connected to the upper end of the movable rod located below the slider, and one end of the spring damper is fixedly connected to the upper surface of the scraper.

[0011] The present invention is further configured such that four slide rails are provided and symmetrically arranged, and several scraper blades and disc rake bodies are provided and evenly distributed in a rectangular array.

[0012] The present invention is further configured such that vertical rods are fixedly connected to the lower surfaces of both ends of the slide rail, and sliding rods are fixedly connected to the outer surfaces of the two vertical rods. The sliding rods penetrate the inner wall of the connecting barrel and the inner wall of the second bearing. The inner wall of the second bearing is movably connected to the outer surface of the sliding rods, and the inner wall of the connecting barrel is slidably connected to the outer surface of the sliding rods.

[0013] The present invention is further configured such that a second bevel gear is fixedly connected to the outer surface of the rotating shaft, the outer surface of the rotating shaft is connected to one end of the rotating roller through the second bevel gear and the first bevel gear, and an adjusting wheel is fixedly connected to one end of the rotating shaft.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a disc harrow for corn planting, which has the following beneficial effects:

[0016] 1. This disc harrow for corn planting, through the arrangement of a slide rail, rotating roller, slider, movable rod, second bearing, sliding rod, and rotating shaft, enables easy adjustment of the spacing between adjacent disc harrow bodies. The arrangement of the first, second, third, and fourth spiral grooves on the outer surface of the rotating roller, and the first, second, third, and fourth spiral sliders on the upper surface of the slider, along with the slide rail, movable rod, connecting barrel, second bearing, and sliding rod, allows for simultaneous adjustment of the spacing between multiple disc harrow bodies during use. This simple and efficient method facilitates quick and easy adjustment of the spacing between adjacent disc harrow bodies.

[0017] 2. This type of disc harrow for corn planting, through the arrangement of a connecting bucket, a first bearing, a scraper, an adapter groove, and a spring damper, enables the disc harrow to easily clean the soil adhering to the outer surface of the harrow body. Through the coordinated arrangement of the connecting bucket, the first bearing, the scraper, the adapter groove, and the spring damper, during use, the disc harrow body is continuously scraped and cleaned by the inner wall of the adapter groove on the scraper as it rotates, preventing soil from continuously adhering to the outer surface of the disc harrow body. This effectively improves the quality of tillage and achieves the purpose of easily cleaning the soil adhering to the outer surface of the disc harrow body. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the lower side structure of the slide rail of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the rotating roller and slider of this utility model;

[0022] Figure 5 This utility model Figure 4 Schematic diagram of the structure at point A;

[0023] Figure 6 This is a three-dimensional exploded view of the sludge scraper and disc rake of this utility model;

[0024] Figure 7 This is a structural diagram of the assembled sludge scraper and disc rake of this utility model;

[0025] Figure 8 This is a three-dimensional structural diagram of the rotating shaft of this utility model.

[0026] In the diagram: 1. Frame; 2. Connecting frame; 3. Slide rail; 4. Rotating roller; 401. First spiral groove; 402. Second spiral groove; 403. Third spiral groove; 404. Fourth spiral groove; 5. Slider; 501. First spiral slider; 502. Second spiral slider; 503. Third spiral slider; 504. Fourth spiral slider; 6. Movable rod; 7. Connecting bucket; 8. First bearing; 9. Scraper; 10. Adaptor groove; 11. Spring damper; 12. Second bearing; 13. Disc rake body; 14. Vertical rod; 15. Slide rod; 16. First bevel gear; 17. Rotating shaft; 18. Second bevel gear; 19. Adjusting wheel. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-8A disc harrow for corn planting includes a frame 1. The frame 1 has a connecting frame 2 fixedly connected to its upper surface by bolts. A slide rail 3 is fixedly connected to the lower surface of the frame 1. Four slide rails 3 are symmetrically arranged along the axial direction of the frame 1. Several scraper blades 9 and disc harrow bodies 13 are evenly distributed in a rectangular array. A rotating roller 4 is rotatably connected to the inner wall of the slide rail 3. A slider 5 is slidably connected to the inner wall of the slide rail 3. A spiral groove is formed on the slide rail 3, and the slider 5 is adapted to the spiral groove. The slider 5 can move axially along the rotating roller 4. A movable rod 6 is fixedly connected to the lower surface of the slider 5. A connecting barrel 7 is fixedly connected to the inner wall of the lower end of the movable rod 6. A second bearing 12 is rotatably connected to the inner wall of the connecting barrel 7. A disc rake body 13 is fixedly connected to one side of the second bearing 12. Vertical rods 14 are fixedly connected to the lower surfaces of both ends of the slide rail 3. Slide rods 15 are fixedly connected to the outer surfaces of the two vertical rods 14. The slide rods 15 penetrate the inner wall of the connecting barrel 7 and the inner wall of the second bearing 12. The inner wall of the second bearing 12 is movably connected to the outer surface of the slide rods 15. The inner wall of the connecting barrel 7 is slidably connected to the outer surface of the slide rods 15. A first bevel gear 16 is fixedly connected to one end of the rotating roller 4. A rotating shaft 17 is rotatably connected to the inner wall of the middle part of the frame 1. A second bevel gear 18 is fixedly connected to the outer surface of the rotating shaft 17. The outer surface of the rotating shaft 17 is connected to one end of the rotating roller 4 through the second bevel gear 18 and the first bevel gear 16. An adjusting wheel 19 is fixedly connected to one end of the rotating shaft 17.

[0031] The spiral groove includes a first spiral groove 401, a second spiral groove 402, a third spiral groove 403, and a fourth spiral groove 404 formed on the outer surface of the rotating roller 4. The depth of the first spiral groove 401, the second spiral groove 402, the third spiral groove 403, and the fourth spiral groove 404 gradually increases, and the pitch of the first spiral groove 401, the second spiral groove 402, the third spiral groove 403, and the fourth spiral groove 404 gradually increases along the axial direction of the rotating roller 4.

[0032] The slider 5 includes: a first spiral slider 501 adapted to the first spiral groove 401, a second spiral slider 502 adapted to the second spiral groove 402, a third spiral slider 503 adapted to the third spiral groove 403, and a fourth spiral slider 504 adapted to the fourth spiral groove 404.

[0033] Specifically, four symmetrically distributed slide rails 3 are welded to the lower surface of frame 1. The inner walls of the slide rails 3 are rotatably connected to rotating rollers 4 via bearings. The outer surface of rotating rollers 4 has first spiral grooves 401 to fourth spiral grooves 404 with increasing depth and pitch. Sliding sliders 5 are slidably connected to the slide rails 3, with the first spiral sliders 501 to fourth spiral sliders 504 at their upper ends respectively embedded in the corresponding spiral grooves. A connecting barrel 7 is welded to the lower end of the movable rod 6. The connecting barrel 7 is rotatably connected to the disc rake body 13 via a second bearing 12. A sliding rod 15 passes through the connecting barrel 7 and the second bearing 12 and is fixed to the vertical rod 14 at the lower end of frame 1. The rotating shaft 17 engages with the first bevel gear 16 at the end of the rotating roller 4 via a second bevel gear 18 for transmission. One end of the rotating roller 19 is fixed. When the rotating roller 19 is rotated, the rotating shaft 17 drives the rotating roller 4 to rotate through the bevel gear set. The spiral grooves with different pitches drive the corresponding sliders 5 to slide along the slide rail 3. Since the pitch of the first spiral groove 401 to the fourth spiral groove 404 is designed in double proportion, the first spiral slider 501 moves a distance of 1 / 2 of the second spiral slider 502, 1 / 4 of the third spiral slider 503, and 1 / 8 of the fourth spiral slider 504 for each rotation of the rotating roller 4. This achieves gradient adjustment of the spacing between adjacent disc harrow bodies 13. This structure can adjust the spacing between multiple discs simultaneously without tools, which improves the adjustment efficiency compared with the traditional bolt fixing method and meets the tillage needs of different corn row spacings.

[0034] Please see Figure 1 and Figure 7 A connecting barrel 7 is fixedly connected to the inner wall of the lower end of the movable rod 6. A first bearing 8 is rotatably connected to the outer surface of the connecting barrel 7. A scraper 9 is fixedly connected to the outer surface of the first bearing 8. An adapter groove 10 is provided on the outer surface of the scraper 9. The inner wall of the adapter groove 10 is slidably connected to the outer surface of the disc rake body 13. A spring damper 11 is fixedly connected to the upper end of the movable rod 6 located below the slider 5. One end of the spring damper 11 is fixedly connected to the upper surface of the scraper 9.

[0035] Specifically, the outer surface of the connecting barrel 7 is rotatably connected to the scraper 9 via the first bearing 8. The inner side of the scraper 9 has an adapter groove 10, the curvature of which matches the outer contour of the disc harrow body 13. The lower end of the movable rod 6 is connected to the upper end of the scraper 9 via a spring damper 11, which provides buffering force. The sliding rod 15 passes through the connecting barrel 7, and the connecting barrel 7 can slide up and down along the sliding rod 15. The second bearing 12 ensures that the disc harrow body 13 rotates independently. When the disc harrow body 13 rotates with the device, the scraper 9 is pressed against its outer surface through the adapter groove 10. The soil falls off under the action of centrifugal force and scraping. When encountering dry soil, the spring damper 11 is compressed to make the scraper 9 retract, avoiding jamming. After the soil falls off, the spring returns to its original position and continues to scrape. This mechanism can continuously remove soil clumps, reduce the amount of mud and dirt adhering to the disc harrow body 13, and reduce plowing resistance.

[0036] In summary, when using the overall equipment: the connecting frame 2 is connected to the rear end of the tractor, and then the device is lowered by the tractor's drive mechanism and moves with the tractor. During the movement, the disc harrow body 13 penetrates the ground, thus plowing the soil. When high-quality plowing is required, the rotating shaft 17 is rotated by the adjusting wheel 19. At this time, the rotating roller 4 is driven to rotate through the second bevel gear 18 and the first bevel gear 16. When the rotating roller 4 rotates, multiple spiral grooves 401 and the first spiral slider 501, the second spiral groove 402 and the third spiral slider 503, the third spiral groove 403 and the third spiral slider 503, and the fourth spiral groove 404 and the fourth spiral slider 504 are driven through the transmission action. The slider 5 slides inside the slide rail 3. When rotated at a certain angle, the moving distance of the first spiral slider 501 is equal to the moving distance of the two second spiral sliders 502, the moving distance of the four third spiral sliders 503, and the moving distance of the eight fourth spiral sliders 504. This achieves the effect of synchronously adjusting the spacing between adjacent disc rake bodies 13. During operation, when there is mud adhering to the outer surface of the disc rake body 13, the mud will be scraped off by the scraper 9 when passing through the inner wall of the adapter groove 10 on the inner side of the scraper 9. The spring damper 11 can buffer the scraper 9 to prevent the difficult-to-remove material from completely jamming the scraper 9 and the disc rake body 13, thus improving the practicality of the device.

[0037] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A disc harrow for corn planting, comprising a frame (1), characterized in that: The upper surface of the frame (1) is fixedly connected to the connecting frame (2) by bolts. The lower surface of the frame (1) is fixedly connected to the slide rail (3). The inner side wall of the slide rail (3) is rotatably connected to the rotating roller (4). The inner side wall of the slide rail (3) is slidably connected to the slider (5). A spiral groove is provided on the slide rail (3). The slider (5) is adapted to the spiral groove. The slider (5) can be moved axially along the rotating roller (4) by the rotating roller (4). The lower surface of the slider (5) is fixedly connected to the movable rod (6). The inner side wall of the lower end of the movable rod (6) is fixedly connected to the connecting barrel (7). The outer surface of the connecting barrel (7) is rotatably connected to the first bearing (8). The outer ring of the first bearing (8) is fixedly connected to the mud scraper (9). The inner side wall of the connecting barrel (7) is rotatably connected to the second bearing (12). The side of the second bearing (12) is fixedly connected to the disc rake body (13). The spiral groove includes a first spiral groove (401), a second spiral groove (402), a third spiral groove (403), and a fourth spiral groove (404) formed on the outer surface of the rotating roller (4). The depth of the first spiral groove (401), the second spiral groove (402), the third spiral groove (403), and the fourth spiral groove (404) gradually increases, and the pitch of the first spiral groove (401), the second spiral groove (402), the third spiral groove (403), and the fourth spiral groove (404) gradually increases along the axial direction of the rotating roller (4). The slider (5) includes: a first spiral slider (501) adapted to the first spiral groove (401), a second spiral slider (502) adapted to the second spiral groove (402), a third spiral slider (503) adapted to the third spiral groove (403), and a fourth spiral slider (504) adapted to the fourth spiral groove (404).

2. The disc harrow for corn planting according to claim 1, characterized in that: The outer surface of the scraper (9) is provided with an adapter groove (10). The inner sidewall of the adapter groove (10) is slidably connected to the outer surface of the disc rake body (13). The upper end of the movable rod (6) is fixedly connected to a spring damper (11) located below the slider (5). One end of the spring damper (11) is fixedly connected to the upper surface of the scraper (9).

3. The disc harrow for corn planting according to claim 1, characterized in that: The slide rails (3) are provided in four symmetrical arrangements along the axial direction of the frame (1), and the scraper (9) and the disc rake body (13) are provided in several symmetrical arrangements in a rectangular array.

4. A disc harrow for corn planting according to claim 1, characterized in that: Vertical rods (14) are fixedly connected to the lower surfaces of both ends of the slide rail (3). Slide rods (15) are fixedly connected to the outer surfaces of the two vertical rods (14). The slide rods (15) penetrate the inner wall of the connecting barrel (7) and the inner wall of the second bearing (12). The inner wall of the second bearing (12) is movably connected to the outer surface of the slide rods (15). The inner wall of the connecting barrel (7) is slidably connected to the outer surface of the slide rods (15).

5. A disc harrow for corn planting according to claim 1, characterized in that: One end of the rotating roller (4) is fixedly connected to a first bevel gear (16), and the inner sidewall of the middle part of the frame (1) is rotatably connected to a rotating shaft (17). The outer surface of the rotating shaft (17) is fixedly connected to a second bevel gear (18). The outer surface of the rotating shaft (17) is connected to one end of the rotating roller (4) through the second bevel gear (18) and the first bevel gear (16). One end of the rotating shaft (17) is fixedly connected to an adjusting wheel (19).

Images