A self-cleaning disc harrow

Abstract

The present invention discloses a self-cleaning disc harrow in the field of disc harrow technology, comprising a main beam, a secondary beam fixedly connected to the left side of the main beam, a plurality of equally spaced connecting rods fixedly connected to the lower side of the main beam, a disc harrow blade rotatably connected to one side of the bottom end of the connecting rod through a rotating connection mechanism, the concave surface of the disc harrow blade is a cone-shaped structure, and the concave surface of the disc harrow blade faces away from the connecting rod; when a certain amount of mud is entangled on the fixed scraper bar, the first movable scraper bar and the second movable scraper bar, the trigger component can automatically trigger the cutting transmission component to operate, and the cutting transmission component can use the rotating disc harrow blade as power to cause the first movable scraper bar and the second movable scraper bar to slide back and forth in opposite directions along the fixed scraper bar, so that the first cutting teeth and the second cutting teeth cut off the entangled weeds, and then the weeds and the soil associated with the weeds can be easily dropped from the fixed scraper bar, the first movable scraper bar and the second movable scraper bar.

Description

Technical Field

[0001] The invention relates to the technical field of disc harrows, in particular to a self-cleaning disc harrow. Background Art

[0002] A disc harrow is a device for tilling and preparing the land, and is mainly used to loosen the soil after plowing. The disc harrow blade is disc-shaped as a whole, with one side of the disc harrow blade being convex and the other being concave. The convex edge is sharpened and used for plowing, and the concave surface is spherical or conical. When plowing, the disc harrow blade penetrates into the soil under the drag of the agricultural vehicle and rotates and cuts the soil. When the soil is wet, the concave surface of the disc harrow blade (especially the concave edge) is prone to sticking to mud, thereby increasing the load on the plowing. Therefore, some disc harrows are provided with a scraper bar at the upper rear side of the concave surface of the disc harrow blade to scrape off the mud in the concave surface of the disc harrow blade, wherein the scraper bar is close to the concave surface of the disc harrow blade but does not contact the disc harrow blade.

[0003] However, when encountering a ground with a lot of weeds, the weeds are easy to be entangled in the scraper bar, and the weeds and soil are easy to accumulate on the scraper bar until the gap between the scraper bar and the disc harrow is filled, thereby increasing the resistance of the disc harrow and the load of the plowing. Moreover, this resistance is easy to squeeze the scraper bar and deform it, thereby affecting the subsequent scraping effect.

[0004] Based on this, the present invention designs a self-cleaning disc harrow to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a self-cleaning disc harrow to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a self-cleaning disc harrow, comprising a main beam, a secondary beam fixedly connected to the left side of the main beam, a plurality of equally spaced connecting rods fixedly connected to the lower side of the main beam, a disc harrow blade rotatably connected to one side of the bottom end of the connecting rod through a rotating connection mechanism, the concave surface of the disc harrow blade is a conical structure, the concave surface of the disc harrow blade faces away from the connecting rod, the rotating shaft of the disc harrow blade is fixedly connected to a transmission column, the outer side wall of the transmission column is a continuous wavy structure, the transmission column is located in the middle of the concave surface of the disc harrow blade, and a weeding and mud scraping strip mechanism is provided on the upper left side of the concave surface of each disc harrow blade on the secondary beam.

[0007] The weeding and scraping strip mechanism includes a fixed frame, the upper end of the fixed frame is fixedly connected to the secondary beam through a fixed mounting assembly, the lower end of the fixed frame is rotatably connected to a rotating shaft, the rotating shaft is concentrically arranged with the rotating shaft of the disc harrow blade, the rotating shaft is fixedly connected to a fixed scraping strip located on the upper left side of the concave surface of the disc harrow blade, the side of the fixed scraping strip away from the concave surface of the disc harrow blade is inclined toward the direction of the main beam, and the side of the fixed scraping strip close to the concave surface of the disc harrow blade is slidably connected to a first movable scraping strip and a second movable scraping strip, the second movable scraping strip is located at the first movable scraping strip The scraper strip is close to one side of the concave surface of the disc harrow blade, and the first movable scraper strip and the second movable scraper strip slide relative to each other. The first movable scraper strip is fixedly connected to one side of the concave surface of the disc harrow blade with a plurality of first cutting teeth distributed at equal intervals, and the second movable scraper strip is fixedly connected to one side of the concave surface of the disc harrow blade with a plurality of second cutting teeth distributed at equal intervals. A cutting transmission assembly is provided between the first movable scraper strip and the second movable scraper strip, and a trigger assembly for triggering the operation of the cutting transmission assembly is provided between the fixed scraper strip and the fixed frame.

[0008] As a further solution of the present invention, the cutting transmission assembly includes a first rack and a transmission wheel, the first rack is fixedly arranged at the upper end of the first movable scraper bar, the first rack is engaged with a gear, the gear is rotatably connected to the fixed scraper bar, the gear is engaged with a second rack on the side away from the first movable scraper bar, the second rack is fixedly arranged at the upper end of the second movable scraper bar, the upper end of the first rack is fixedly connected to a first spring, the upper end of the first spring is fixedly connected to the fixed scraper bar, the transmission wheel is located on the upper side of the transmission column and is rotatably connected to the lower end of the first movable scraper bar, and the rim of the transmission wheel can contact the outer wavy wall of the transmission column.

[0009] As a further solution of the present invention, the trigger assembly includes a first fixed plate and a lifting plate, the first fixed plate is fixedly connected to the upper end of the fixed scraper strip away from the disc rake blade, the first fixed plate is fixedly connected to the second spring on the side of the first fixed plate close to the main beam, the second spring is fixedly connected to the second fixed plate on one end close to the main beam, the second fixed plate is fixedly connected to the fixed frame, the second fixed plate is fixedly connected to a limiting push rod on the side close to the first fixed plate, the end of the limiting push rod away from the second fixed plate can contact the first fixed plate, the second fixed plate is fixedly connected to an L-shaped limit piece, the bending portion of the L-shaped limit piece can contact the side of the first fixed plate away from the second fixed plate, the L-shaped limit piece is fixedly connected to an inclined surface fixing block, the lifting plate is fixedly connected to the first movable scraper strip, and the bottom side of the lifting plate can contact the sloped surface on the inclined surface fixing block.

[0010] As a further solution of the present invention, the fixed mounting assembly includes a first mounting plate and a second mounting plate, the first mounting plate is fixedly arranged at the upper end of the fixed frame, the first mounting plate is located on the lower side of the secondary beam, the second mounting plate is located on the upper side of the secondary beam, and the first mounting plate is fixedly connected to the second mounting plate by a first bolt.

[0011] As a further solution of the present invention, two parallel guide side baffles are fixedly connected to the upper surface of the second mounting plate, and the two guide side baffles are respectively located on the left and right sides of the secondary beam, and the distance between the two guide side baffles matches the width of the secondary beam.

[0012] As a further solution of the present invention, the rotating connection mechanism includes a bearing, the outer ring of the bearing is fixedly connected to the connecting rod, the inner ring of the bearing is fixedly connected to the square shaft, the middle part of the square shaft is fixedly connected to the fixed disk, the side of the fixed disk away from the connecting rod is fixedly connected to the transmission column by a second bolt, the disc harrow blade is clamped between the fixed disk and the transmission column, the disc harrow blade is provided with a square through-hole corresponding to the square shaft, and the transmission column is provided with a square socket corresponding to the square shaft.

[0013] As a further solution of the present invention, the second cutting teeth are arranged in an arc-shaped structure near the corner of the concave surface of the disc harrow blade.

[0014] As a further solution of the present invention, cutting edges are provided on both upper and lower sides of the first cutting teeth.

[0015] As a further solution of the present invention, the bottom end of the first movable mud scraper strip is fixedly connected to a mud guard, and the mud guard is located on the upper left side of the transmission column.

[0016] As a further solution of the present invention, the secondary beam is parallel to the rotation axis, and the secondary beam is parallel to the rotation axis of the disc harrow blade.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can scrape away soil adhered to the concave surface of the disc harrow blade by means of a fixed scraper bar, a first movable scraper bar, and a second movable scraper bar. When a certain amount of soil is entangled on the fixed scraper bar, the first movable scraper bar, and the second movable scraper bar, a trigger assembly can automatically trigger the operation of the cutting transmission assembly. The cutting transmission assembly can use the rotating disc harrow blade as power to cause the first movable scraper bar and the second movable scraper bar to slide back and forth in opposite directions along the fixed scraper bar, thereby causing the first cutting teeth and the second cutting teeth to cut off the entangled weeds, thereby allowing the weeds and the soil associated with the weeds to easily fall off the fixed scraper bar, the first movable scraper bar, and the second movable scraper bar, thereby avoiding increasing the load on the plowing field and preventing the scraper bars from being deformed due to the accumulation of excessive weeds and soil.

[0019] 2. When weeds and soil accumulated on the fixed scraper bar, the first movable scraper bar, and the second movable scraper bar fall off, the trigger assembly of the present invention can automatically stop the operation of the automatic trigger cutting transmission assembly immediately, and the first movable scraper bar and the second movable scraper bar can resume relative fixation, and the relative resistance to the rotating disc harrow blade can be stopped in time, thereby avoiding excessive energy consumption during normal plowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the disc harrow blade and its internal mechanism;

[0022] Figure 3 A schematic top-down cross-sectional view of a fixed scraper bar and its internal mechanism;

[0023] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the cutting transmission assembly;

[0025] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0026] Figure 7 A schematic diagram showing a top-down view of the trigger component;

[0027] Figure 8 It is a plan view of the fixed installation components;

[0028] Figure 9 Schematic diagram of the transmission column and its internal structure.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Main beam; 2. Secondary beam; 3. Connecting rod; 4. Disc harrow; 5. Transmission column; 6. Fixed frame; 7. Rotating shaft; 8. Fixed scraper bar; 9. First movable scraper bar; 10. Second movable scraper bar; 11. First cutting tooth; 12. Second cutting tooth; 13. First rack; 14. Gear; 15. Second rack; 16. First spring; 17. Transmission wheel; 18. First fixed plate; 19. Second spring; 20. Second fixed plate; 21. Limiting push rod; 22. L-shaped limiting member; 23. Inclined fixing block; 24. Lifting plate; 25. First mounting plate; 26. Second mounting plate; 27. First bolt; 28. Guide side baffle; 29. Bearing; 30. Square shaft; 31. Fixed plate; 32. Second bolt; 33. Mudguard. DETAILED DESCRIPTION

[0031] See also Figure 1-9 The present invention provides a technical solution: a self-cleaning disc harrow, comprising a main beam 1, a secondary beam 2 being fixedly connected to the left side of the main beam 1, a plurality of equally distributed connecting rods 3 being fixedly connected to the lower side of the main beam 1, a disc harrow blade 4 being rotatably connected to one side of the bottom end of the connecting rod 3 through a rotating connection mechanism, the concave surface of the disc harrow blade 4 being a cone-shaped structure, the concave surface of the disc harrow blade 4 facing away from the connecting rod 3, the rotating shafts of the disc harrow blade 4 being fixedly connected to a transmission column 5, the outer side wall of the transmission column 5 being a circle of continuous wavy structure, the transmission column 5 being located in the middle of the concave surface of the disc harrow blade 4, and a weeding and scraping strip mechanism being provided on the upper left side of the concave surface of each disc harrow blade 4 on the secondary beam 2.

[0032] The weeding and scraping strip mechanism includes a fixed frame 6, the upper end of the fixed frame 6 is fixedly connected to the secondary beam 2 through a fixed mounting assembly, the lower end of the fixed frame 6 is rotatably connected to a rotating shaft 7, the rotating shaft 7 is concentrically arranged with the rotating shaft of the disc harrow blade 4, the rotating shaft 7 is fixedly connected to a fixed scraping strip 8 located on the upper left side of the concave surface of the disc harrow blade 4, the fixed scraping strip 8 is away from the side of the concave surface of the disc harrow blade 4 and is inclined toward the main beam 1, the fixed scraping strip 8 is close to the side of the concave surface of the disc harrow blade 4 and is slidably connected to a first movable scraping strip 9 and a second movable scraping strip 10, the second movable scraping strip 10 is located at the first movable scraping strip 8. The scraping strip 9 is close to the side of the concave surface of the disc harrow blade 4, and the first movable scraping strip 9 and the second movable scraping strip 10 slide relative to each other. The first movable scraping strip 9 is fixedly connected to the side of the concave surface of the disc harrow blade 4 with a plurality of first cutting teeth 11 distributed at equal intervals, and the second movable scraping strip 10 is fixedly connected to the side of the concave surface of the disc harrow blade 4 with a plurality of second cutting teeth 12 distributed at equal intervals. A cutting transmission assembly is provided between the first movable scraping strip 9 and the second movable scraping strip 10, and a trigger assembly for triggering the operation of the cutting transmission assembly is provided between the fixed scraping strip 8 and the fixed frame 6.

[0033] When the above scheme is put into actual use, the main beam 1 is towed by the agricultural vehicle, with the main beam 1 in front and the secondary beam 2 behind. The disc harrow blade 4 is dragged deep into the soil and rotates clockwise under the resistance of the soil. The wet mud adhering to the concave surface of the disc harrow blade 4 will be scraped off together by the fixed scraping strip 8, the first movable scraping strip 9 and the second movable scraping strip 10 of the main beam. The fixed scraping strip 8, the first movable scraping strip 9 and the second movable scraping strip 10 of the main beam are relatively fixed at the beginning. When the wet mud adhering to the concave surface of the disc harrow blade 4 contains weeds, the weeds will be entangled with a large amount of mud on the fixed scraping strip 8, the first movable scraping strip 9 and the second movable scraping strip 10. When the weeds fill the gap between the second movable scraping strip 10 and the disc harrow blade 4, The rotating disc harrow blade 4 triggers the cutting transmission assembly to operate through the trigger assembly. The rotating disc harrow blade 4 serves as a power to make the first movable scraper bar 9 and the second movable scraper bar 10 slide back and forth in the opposite direction along the fixed scraper bar 8 through the cutting transmission assembly, so that the first cutting teeth 11 and the second cutting teeth 12 cooperate to cut the weeds. As the weeds are cut, most of the weeds and soil will fall from the fixed scraper bar 8, the first movable scraper bar 9 and the second movable scraper bar 10; when most of the weeds and soil fall from the fixed scraper bar 8, the first movable scraper bar 9 and the second movable scraper bar 10, the trigger assembly automatically stops the operation of the cutting transmission assembly, and the first movable scraper bar 9 and the second movable scraper bar 10 are turned off. The strips 10 return to a relatively fixed state until a large amount of weeds and soil accumulates again on the fixed scraping strips 8, the first movable scraping strips 9 and the second movable scraping strips 10; in this way, the disc harrow can scrape off the soil adhered to the concave surface of the disc harrow blade 4 through the fixed scraping strips 8, the first movable scraping strips 9 and the second movable scraping strips 10. When a certain amount of soil is wrapped around the fixed scraping strips 8, the first movable scraping strips 9 and the second movable scraping strips 10, the trigger assembly can automatically trigger the cutting transmission assembly to operate, and the cutting transmission assembly can use the rotating disc harrow blade 4 as power to cause the first movable scraping strips 9 and the second movable scraping strips 10 to slide back and forth in the opposite direction along the fixed scraping strip 8, thereby making the first cutting teeth 11 The first movable scraper bar 9 and the second movable scraper bar 10 cut off the entangled weeds, so that the weeds and the soil associated with the weeds can easily fall off from the fixed scraper bar 8, the first movable scraper bar 9 and the second movable scraper bar 10, which can avoid increasing the load of the plowing and can avoid deformation of the scraper bars caused by excessive accumulation of weeds and soil; the trigger component in the disc harrow can automatically prompt the automatic trigger cutting transmission component to stop running immediately after the weeds and soil accumulated on the fixed scraper bar 8, the first movable scraper bar 9 and the second movable scraper bar 10 fall off, and the first movable scraper bar 9 and the second movable scraper bar 10 are restored to relative fixity, which can stop the relative resistance to the rotating disc harrow blade 4 in time, thereby avoiding excessive energy consumption during normal plowing.

[0034] like Figure 5 、 7As shown, as a further solution of the present invention, the cutting transmission assembly includes a first rack 13 and a transmission wheel 17, the first rack 13 is fixedly arranged at the upper end of the first movable scraper bar 9, the first rack 13 is engaged with a gear 14, the gear 14 is rotatably connected to the fixed scraper bar 8, the gear 14 is engaged with a second rack 15 on the side away from the first movable scraper bar 9, the second rack 15 is fixedly arranged at the upper end of the second movable scraper bar 10, the upper end of the first rack 13 is fixedly connected to a first spring 16, the upper end of the first spring 16 is fixedly connected to the fixed scraper bar 8, the transmission wheel 17 is located on the upper side of the transmission column 5 and is rotatably connected to the lower end of the first movable scraper bar 9, and the rim of the transmission wheel 17 can contact the outer wavy wall of the transmission column 5.

[0035] When the above scheme is put into actual use, after the cutting transmission assembly is triggered by the trigger assembly, the first movable scraper strip 9 can slide freely along the fixed scraper strip 8. At this time, the first movable scraper strip 9 slides down under the elastic force of the first spring 16, causing the transmission wheel 17 to contact the wavy wall on the outside of the transmission column 5. The transmission column 5 rotates with the disc harrow 4 all the time. In this way, the first movable scraper strip 9 moves back and forth up and down under the interaction of the extrusion of the transmission wheel 17 by the outer wall of the transmission column 5 and the thrust of the first spring 16. At the same time, the first movable scraper strip 9 drives the first rack 13 to move synchronously, the first rack 13 drives the gear 14 to rotate, and the gear 14 drives the second rack 15 and the second movable scraper strip 10 to move back and forth up and down in the opposite direction of the first movable scraper strip 9, so that the first cutting teeth 11 and the second cutting teeth 12 can quickly cut weeds.

[0036] like Figure 5 、 7 As shown, as a further solution of the present invention, the trigger assembly includes a first fixed plate 18 and a lifting plate 24, the first fixed plate 18 is fixedly connected to the upper end of the fixed scraper strip 8 away from the disc rake blade 4, the first fixed plate 18 is fixedly connected to the side of the first fixed plate 18 close to the main beam 1 with a second spring 19, the second spring 19 is fixedly connected to the end close to the main beam 1 with a second fixed plate 20, the second fixed plate 20 is fixedly connected to the fixing frame 6, the second fixed plate 20 is fixedly connected to the side of the second fixed plate 20 close to the first fixed plate 18 with a limiting push rod 21, the end of the limiting push rod 21 away from the second fixed plate 20 can contact the first fixed plate 18, the second fixed plate 20 is fixedly connected to an L-shaped limiter 22, the bent portion of the L-shaped limiter 22 can contact the side of the first fixed plate 18 away from the second fixed plate 20, the L-shaped limiter 22 is fixedly connected to the inclined surface fixing block 23, the lifting plate 24 is fixedly connected to the first movable scraper strip 9, and the bottom side of the lifting plate 24 can contact the sloped surface on the inclined surface fixing block 23.

[0037] When the above scheme is put into actual use, after a certain amount of weeds and soil are squeezed into the gap between the first movable scraper strip 9, the second movable scraper strip 10 and the concave surface of the disc harrow blade 4, the rotating disc harrow blade 4 can drive the fixed scraper strip 8, the first movable scraper strip 9 and the second movable scraper strip 10 to flip upward slightly by friction, and the first fixed plate 18 moves with the fixed scraper strip 8 and compresses the second spring 19. At the same time, the lifting plate 24 moves with the first movable scraper strip 9 and slides along the slope of the inclined fixed block 23. When the first fixed plate 18 flips over to be supported by the limiting push rod 21, the lifting plate 24 just slides to the end of the inclined fixed block 23 and separates from the inclined fixed block 23. At this time, the lifting plate 24 is no longer limited by the inclined fixed block 23 in the up and down directions, that is, the first movable scraper strip 9 can slide freely up and down along the fixed scraper strip 8, so that the cutting transmission assembly can operate; when the weeds are cut and the fixed scraper strip 8, the first movable scraper strip 9 and the second movable scraper strip 10 are After most of the weeds and soil on the movable scraper strip 10 fall off, there are not enough weeds and soil in the gap between the first movable scraper strip 9, the second movable scraper strip 10 and the concave surface of the disc harrow blade 4 to increase the friction. The first fixed plate 18 provides the fixed scraper strip 8 with the potential energy for resetting under the elastic force of the second spring 19. Subsequently, as long as the transmission wheel 17 is pushed to the highest point by the transmission column 5, the bottom surface of the lifting plate 24 on the first movable scraper strip 9 can just meet the upper slope of the inclined fixed block 23. The end of the surface contacts, at this time, under the thrust of the second spring 19, the first fixed plate 18, the fixed scraper strip 8, the first movable scraper strip 9 and the second movable scraper strip 10 gradually flip over in the opposite direction, and the lifting plate 24 slides along the slope of the inclined surface of the inclined fixed block 23, causing the transmission wheel 17 to separate from the transmission column 5, thereby stopping the cutting transmission assembly from running. When the first fixed plate 18 contacts the L-shaped limiter 22, the fixed scraper strip 8, the first movable scraper strip 9 and the second movable scraper strip 10 are just reset.

[0038] like Figure 2 、 8 As shown, as a further solution of the present invention, the fixed mounting assembly includes a first mounting plate 25 and a second mounting plate 26, the first mounting plate 25 is fixedly arranged on the upper end of the fixing frame 6, the first mounting plate 25 is located on the lower side of the secondary beam 2, and the second mounting plate 26 is located on the upper side of the secondary beam 2, and the first mounting plate 25 is fixedly connected to the second mounting plate 26 by a first bolt 27; during installation, the setting of the fixed mounting assembly can facilitate the installation and disassembly of the weeding and scraping strip mechanism, thereby facilitating the installation and disassembly of the disc harrow blade 4.

[0039] like Figure 8As shown, as a further solution of the present invention, two parallel guide side baffles 28 are fixedly connected to the upper surface of the second mounting plate 26, and the two guide side baffles 28 are respectively located on the left and right sides of the secondary beam 2, and the spacing between the two guide side baffles 28 matches the width of the secondary beam 2; during installation, the setting of the guide side baffles 28 on both sides can facilitate the stabilization of the orientation of the weeding and scraping strip mechanism.

[0040] like Figure 9 As shown, as a further solution of the present invention, the rotating connection mechanism includes a bearing 29, the outer ring of the bearing 29 is fixedly connected to the connecting rod 3, the inner ring of the bearing 29 is fixedly connected to a square shaft 30, the middle part of the square shaft 30 is fixedly connected to a fixed plate 31, the side of the fixed plate 31 away from the connecting rod 3 is fixedly connected to the transmission column 5 by a second bolt 32, the disc harrow blade 4 is clamped between the fixed plate 31 and the transmission column 5, the disc harrow blade 4 is provided with a square through-hole corresponding to the square shaft 30, and the transmission column 5 is provided with a square jack corresponding to the square shaft 30; during installation, the fixed plate 31 can clamp the two sides of the disc harrow blade 4 with the transmission column 5, and fix the disc harrow blade 4 and the transmission column 5 through the fixed plate 31, so that the disc harrow blade 4 is not easy to swing during rotation.

[0041] like Figure 4 As shown, as a further embodiment of the present invention, the second cutting teeth 12 are arranged in an arc-shaped structure near the corner of the concave surface of the disc blade 4; during operation, the arrangement of the arc angle can reduce the wear on the disc blade 4 when the second cutting teeth 12 may accidentally collide or contact with the disc blade 4.

[0042] like Figure 6 As shown, as a further solution of the present invention, the upper and lower sides of the first cutting tooth 11 are provided with cutting edges; during operation, the setting of the cutting edges on both sides of the first cutting tooth 11 can improve the efficiency of weed cutting.

[0043] like Figure 1 、 2 As shown in Figure 7, as a further solution of the present invention, the bottom end of the first movable scraper strip 9 is fixedly connected to a mudguard 33, and the mudguard 33 is located on the upper left side of the transmission column 5; for working purposes, the mudguard 33 can prevent weeds and dirt from falling onto the transmission column 5.

[0044] like Figure 2 As shown, as a further embodiment of the present invention, the secondary beam 2 is parallel to the rotation axis 7, and the secondary beam 2 is parallel to the rotation axis of the disc blade 4. During operation, because the secondary beam 2, the rotation axis 7 and the rotation axis of the disc blade 4 are parallel, it is easier to place the rotation axis 7 and the rotation axis of the disc blade 4 on the same axis during installation.

Claims

1. A self-cleaning disc harrow, comprising: The invention comprises a main beam (1), wherein a secondary beam (2) is fixedly connected to the left side of the main beam (1), and a plurality of equally spaced connecting rods (3) are fixedly connected to the lower side of the main beam (1), and a disc harrow blade (4) is rotatably connected to one side of the bottom end of each connecting rod (3) through a rotating connection mechanism, wherein the concave surface of each disc harrow blade (4) is a conical structure, and the concave surface of each disc harrow blade (4) faces away from the connecting rod (3), and the rotating shaft of each disc harrow blade (4) is fixedly connected to a transmission column (5), wherein the outer wall of the transmission column (5) is a continuous wavy structure, and the transmission column (5) is located in the middle of the concave surface of the disc harrow blade (4), and a weeding and mud scraping strip mechanism is provided on the upper left side of the concave surface of each disc harrow blade (4) on the secondary beam (2); The weeding and scraping strip mechanism comprises a fixed frame (6), the upper end of the fixed frame (6) is fixedly connected to the secondary beam (2) through a fixed mounting assembly, the lower end of the fixed frame (6) is rotatably connected to a rotating shaft (7), the rotating shaft (7) is concentrically arranged with the rotating shaft of the disc harrow blade (4), the rotating shaft (7) is fixedly connected to a fixed scraping strip (8) located on the upper left side of the concave surface of the disc harrow blade (4), the side of the fixed scraping strip (8) away from the concave surface of the disc harrow blade (4) is inclined toward the main beam (1), and the side of the fixed scraping strip (8) close to the concave surface of the disc harrow blade (4) is slidably connected to a first movable scraping strip (9) and a second movable scraping strip (10), the second movable scraping strip (10) being located The first movable scraper strip (9) is located near the concave surface of the disc harrow blade (4), and the first movable scraper strip (9) and the second movable scraper strip (10) slide relative to each other. The first movable scraper strip (9) is fixedly connected to the side of the concave surface of the disc harrow blade (4) with a plurality of first cutting teeth (11) distributed at equal intervals, and the second movable scraper strip (10) is fixedly connected to the side of the concave surface of the disc harrow blade (4) with a plurality of second cutting teeth (12) distributed at equal intervals. A cutting transmission assembly is provided between the first movable scraper strip (9) and the second movable scraper strip (10), and a trigger assembly for triggering the operation of the cutting transmission assembly is provided between the fixed scraper strip (8) and the fixed frame (6); The cutting transmission assembly includes a first rack (13) and a transmission wheel (17), wherein the first rack (13) is fixedly arranged on the upper end of the first movable scraper strip (9), the first rack (13) is meshed with a gear (14), the gear (14) is rotatably connected to the fixed scraper strip (8), the gear (14) is meshed with a second rack (15) on the side away from the first movable scraper strip (9), the second rack (15) is fixedly arranged on the upper end of the second movable scraper strip (10), the upper end of the first rack (13) is fixedly connected to a first spring (16), the upper end of the first spring (16) is fixedly connected to the fixed scraper strip (8), the transmission wheel (17) is located on the upper side of the transmission column (5) and is rotatably connected to the lower end of the first movable scraper strip (9), and the rim of the transmission wheel (17) can contact the outer wavy wall of the transmission column (5); The trigger assembly comprises a first fixed plate (18) and a lifting plate (24), wherein the first fixed plate (18) is fixedly connected to the upper end of the fixed scraper strip (8) on the side away from the disc harrow blade (4), the first fixed plate (18) is fixedly connected to a second spring (19) on the side close to the main beam (1), the second spring (19) is fixedly connected to an end close to the main beam (1), the second fixed plate (20) is fixedly connected to the fixing frame (6), and the second fixed plate (20) is fixedly connected to a limiting push rod (20) on the side close to the first fixed plate (18). 1), one end of the limiting push rod (21) away from the second fixed plate (20) can contact the first fixed plate (18), the second fixed plate (20) is fixedly connected to an L-shaped limiting member (22), the bent portion of the L-shaped limiting member (22) can contact the side of the first fixed plate (18) away from the second fixed plate (20), the L-shaped limiting member (22) is fixedly connected to an inclined surface fixing block (23), the lifting plate (24) is fixedly connected to the first movable scraping strip (9), and the bottom side of the lifting plate (24) can contact the slope surface on the inclined surface fixing block (23).

2. A self-cleaning disc harrow according to claim 1, characterized in that: The fixed installation assembly comprises a first installation plate (25) and a second installation plate (26), wherein the first installation plate (25) is fixedly arranged on the upper end of the fixed frame (6), the first installation plate (25) is located on the lower side of the secondary beam (2), and the second installation plate (26) is located on the upper side of the secondary beam (2), and the first installation plate (25) is fixedly connected to the second installation plate (26) by a first bolt (27).

3. A self-cleaning disc harrow according to claim 2, characterized in that: Two parallel guide side baffles (28) are fixedly connected to the upper surface of the second mounting plate (26), and the two guide side baffles (28) are respectively located on the left and right sides of the secondary beam (2), and the distance between the two guide side baffles (28) matches the width of the secondary beam (2).

4. The self-cleaning disc harrow according to claim 1, characterized in that: The rotating connection mechanism comprises a bearing (29), the outer ring of the bearing (29) is fixedly connected to the connecting rod (3), the inner ring of the bearing (29) is fixedly connected to a square shaft (30), the middle part of the square shaft (30) is fixedly connected to a fixed disk (31), the side of the fixed disk (31) away from the connecting rod (3) is fixedly connected to the transmission column (5) through a second bolt (32), the disc harrow blade (4) is clamped between the fixed disk (31) and the transmission column (5), the disc harrow blade (4) is provided with a square through hole corresponding to the square shaft (30), and the transmission column (5) is provided with a square plug hole corresponding to the square shaft (30).

5. The self-cleaning disc harrow according to claim 1, characterized in that: The second cutting teeth (12) are arranged in an arc-shaped structure near the corner of the concave surface of the disc harrow blade (4).

6. The self-cleaning disc harrow according to claim 1, characterized in that: Cutting edges are provided on both upper and lower sides of the first cutting tooth (11).

7. The self-cleaning disc harrow according to claim 1, characterized in that: The bottom end of the first movable mud scraper strip (9) is fixedly connected to a mud guard (33), and the mud guard (33) is located on the upper left side of the transmission column (5).

8. The self-cleaning disc harrow according to claim 1, characterized in that: The secondary beam (2) is parallel to the rotating shaft (7), and the secondary beam (2) is parallel to the rotating shaft of the disc harrow blade (4).

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