Cutting device of corn harvesting header

Abstract

The utility model relates to a cutting device of a corn harvesting header, and belongs to the technical field of agricultural harvesters. According to the technical scheme, the stem pulling device comprises a left stem pulling roller assembly and a right stem pulling roller assembly which are axially symmetrically arranged on a rack body, each stem pulling roller assembly comprises a stem pulling roller main shaft, a stem pulling plate, cutters and a spiral conveying shaft, the rear end of each stem pulling roller main shaft is in meshed connection with a gearbox, the spiral conveying shafts are arranged at the front end of each stem pulling roller main shaft, and the cutters are evenly fixed to the outer surface of each stem pulling roller main shaft; the cutters are connected end to end to form an annular structure, and the head end of each cutter extends outwards and is provided with an inclined edge. A stem pulling plate is arranged on the outer side of each cutter and is a bent plate composed of a transverse plate and a vertical plate, the transverse plates are fixed to the outer surfaces of the cutters, and the vertical plates are adjacent to the head ends of the cutters. According to the corn stalk cutting device, the cutting device is simplified, a cutter box body does not need to be independently arranged, corn stalks can be directly pulled and cut up through the stalk pulling roller, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to a cutting device for a corn harvesting header, belonging to the technical field of agricultural harvesters. Background Art

[0002] The cutting device is an important part of the corn harvesting header. Its function is a device that shreds corn straw when harvesting corn ears. At present, the cutting devices at the front end of most headers on the market are mainly spiral ear pulling rollers with cutters and opposed knife type stalk pulling rollers with cutters. Both complete the shredding of straw through high-speed rotating cutters configured at the bottom of the header. This not only makes the transmission system more complex, occupies a large space, and is inconvenient for maintenance with high costs, but also easily causes damage to the cutter device when the ground is uneven, resulting in the inability to carry out normal harvesting work and reducing the harvesting efficiency. Therefore, there is an urgent need to design a cutting device with a simple structure, convenient maintenance and high cutting efficiency to meet the current requirements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cutting device for a corn harvesting header. By evenly arranging the stalk pulling plates and cutters on the stalk pulling main shaft, it can simultaneously complete the pulling and shredding of corn straw, and evenly shred and scatter the straw in the field, solving the problems of complex structure, large occupied space and low cutting efficiency in the above background art.

[0004] The technical solution of the utility model is as follows:

[0005] A corn harvesting cutting device includes a left stalk pulling roller assembly and a right stalk pulling roller assembly symmetrically arranged about an axis on a frame main body. The left stalk pulling roller assembly and the right stalk pulling roller assembly have the same structure, and both include a stalk pulling roller main shaft, a stalk pulling plate, a cutter and a spiral conveyor shaft. The rear end of the stalk pulling roller main shaft is meshed and connected with a gearbox. A spiral conveyor shaft is provided at the front end of the stalk pulling roller main shaft. A plurality of cutters are evenly fixed on the outer surface of the stalk pulling roller main shaft. The heads and tails of the plurality of cutters are connected end to end to form an annular structure. The head end of each cutter extends outwards and is provided with an inclined edge. A stalk pulling plate is provided outside each cutter. The stalk pulling plate is a bent plate composed of a horizontal plate and a vertical plate. The horizontal plate is fixed on the outer surface of the cutter, and the vertical plate is adjacent to the head end of the cutter.

[0006] Further, the stalk pulling roller main shaft is a cube, and a plurality of threaded holes are provided on each face of the cube. Four cutters are respectively fixed on four faces of the stalk pulling roller main shaft through bolts, and the adjacent two cutters are vertically arranged head to tail; the horizontal plates of the corresponding stalk pulling plates are respectively fixed outside each cutter through bolts.

[0007] Further, a plurality of straight slots matching the threaded holes are provided on the cutter. The straight slots are used to adjust the installation position of the cutter on the stalk pulling roller main shaft, and further change the distance between adjacent two cutters in the left stalk pulling roller assembly and the right stalk pulling roller assembly.

[0008] Further, the front end of the spiral conveyor shaft is fixedly connected to the guiding cone through a bearing inside it. The guiding cone is bolted to the main body of the frame through a U-shaped support plate.

[0009] Further, a weed removing plate is provided at the lower end of the main body of the frame. The front end of the weed removing plate is bent at a certain angle and is provided with a blade tip.

[0010] Further, a chamfer is provided at the bending part of the pulling stem plate.

[0011] Further, a guiding key is provided at the rear end of the spiral conveyor shaft. The guiding key and the cutting knife are arranged in the same plane.

[0012] Further, an external spline is provided at the rear end of the main shaft of the pulling stem roller, which meshes with the gear in the gearbox. The front end of the main shaft of the pulling stem roller is a round shaft and is fixedly connected to the rear end of the spiral conveyor shaft.

[0013] Further, a grass blocking plate is provided at the rear ends of the left pulling stem roller assembly and the right pulling stem roller assembly. The front end edge of the grass blocking plate is semi-circular and is fixedly connected to the gearbox housing.

[0014] Further, the spiral threads on the spiral conveyor shafts of the left pulling stem roller assembly and the right pulling stem roller assembly are arranged in a staggered manner.

[0015] Further, a weeding piece is arranged at the front end of the spiral conveyor shaft and is fixed on the guiding cone. The front end of the weeding piece is provided with a blade edge and is closely attached to the spiral conveyor shaft.

[0016] Positive effects of the present utility model: The present utility model simplifies the cutting device, eliminates the need to separately set up a cutting knife box body, and can directly complete the pulling and shredding of corn straws through the pulling stem rollers. The structure is simple and the manufacturing cost is low; moreover, the distance between the inclined edges of two adjacent cutting knives in the left pulling stem roller assembly and the right pulling stem roller assembly can be adjusted through the straight grooves on the cutting knife, adapting to corn crops in different regions; the guiding cone is fixed on the main body of the frame while the spiral conveyor shaft rotates, reducing the accumulation of crops during work, and effectively and evenly enabling the crops to enter the next process, greatly improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic view of the bottom structure of an embodiment of the present invention;

[0018] Figure 2 It is an isometric view of an embodiment of the present invention;

[0019] Figure 3 It is a schematic view of the working state of the pulling stem plate of an embodiment of the present invention;

[0020] Figure 4Schematic diagram of the working state of the cutting knife according to the embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the structure of the pulling roller assembly according to the embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the main shaft of the pulling roller according to the embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the weed removing board according to the embodiment of the present invention

[0024] In the figure: frame body 1, main shaft of pulling roller 2, threaded hole 201, pulling plate 3, horizontal plate 301, vertical plate 302, cutting knife 4, inclined edge 401, spiral conveyor shaft 5, gearbox 6, guiding cone 7, U-shaped support plate 8, weed removing board 9, blade tip 901, grass blocking board 10, weed removing piece 11. Specific embodiments

[0025] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0026] Refer to the attached Figure 1-7 , this embodiment provides a corn harvesting and cutting device, which includes a left pulling roller assembly and a right pulling roller assembly symmetrically arranged on the frame body 1 along the axis. The left pulling roller assembly and the right pulling roller assembly have the same structure, and both include a main shaft of pulling roller 2, a pulling plate 3, a cutting knife 4, a spiral conveyor shaft 5 and a guiding cone 7. The rear end of the main shaft of pulling roller 2 is meshed and connected with the gearbox 6. The front end of the main shaft of pulling roller 2 is successively provided with a spiral conveyor shaft 5 and a guiding cone 7. A plurality of cutting knives 4 are evenly fixed on the outer surface of the main shaft of pulling roller 2. The plurality of cutting knives 4 are connected end to end to form a ring structure. The front end of each cutting knife 4 extends outwards and is provided with an inclined edge 401; a pulling plate 3 is arranged outside each cutting knife 4. The pulling plate 3 is an L-shaped plate composed of a horizontal plate 301 and a vertical plate 302. In this embodiment, the included angle between the horizontal plate 301 and the vertical plate 302 is 90 degrees. The horizontal plate 301 is fixed on the outer surface of the cutting knife 4, and the vertical plate 302 is adjacent to the front end of the cutting knife 4.

[0027] Refer to the attached Figure 6 , the main shaft of pulling roller 2 is a cube, and three threaded holes 201 are provided on each face of the cube, and the threaded holes 201 are evenly arranged. Refer to the attached Figure 3 and 4 , four cutting knives 4 are respectively fixed on four faces of the main shaft of pulling roller 2 by bolts, and the adjacent two cutting knives 4 are arranged perpendicular to each other end to end; the horizontal plate 301 of the corresponding pulling plate 3 is respectively fixed outside each cutting knife 4 by bolts, and the vertical plate 302 forms a 90-degree angle with the cutting knife 4.

[0028] Preferably, a plurality of straight notches matching the threaded holes 201 are provided on the cutter 4. The straight notches are used to adjust the installation position of the cutter 4 on the main shaft 2 of the pulling roller, thereby changing the distance between the inclined edges 401 of two adjacent cutters 4 in the left pulling roller assembly and the right pulling roller assembly.

[0029] The front end of the spiral conveyor shaft 5 is fixedly connected to the guiding cone 7 through a bearing inside it. The guiding cone 7 is bolted to the main body 1 of the frame through a U-shaped support plate 8, thus ensuring the disassembly and replacement of the subsequent guiding cone 8. The guiding cone 7 is fixed on the main body 1 of the frame, while the spiral conveyor shaft 5 rotates through a bearing, reducing the accumulation of crops during operation, and can effectively and evenly enable the crops to enter the next process, greatly improving the working efficiency.

[0030] A weed removal plate 9 is provided at the lower end of the main body 1 of the frame. The front end of the weed removal plate 9 is bent at a certain angle and is provided with a blade tip 901. The blade tip 901 is tangent to the outer diameter of the left and right pulling roller assemblies with an interval of 2 - 3 mm, effectively preventing weeds from winding around the left and right pulling roller assemblies.

[0031] A chamfer is provided at the bent part of the pulling plate 3 to avoid the accumulation of corn straws and enable the straws to enter the cutting device orderly.

[0032] A guiding key is provided at the rear end of the spiral conveyor shaft 5. The guiding key and the cutter 4 are arranged in the same plane, reducing material blockage and increasing smoothness.

[0033] The rear end of the main shaft 2 of the pulling roller is provided with an external spline, which meshes with the gear in the gearbox 6. The front end of the main shaft 2 of the pulling roller is a round shaft and is fixedly connected to the rear end of the spiral conveyor shaft 5.

[0034] A weed blocking plate 10 is provided at the rear end of the left and right pulling roller assemblies. The front end edge of the weed blocking plate 10 is designed to be semi-circular, and the rear end is fixedly connected to the housing of the gearbox 6. The semi-circular design fits the outer diameter of the left and right pulling roller assemblies, thus largely preventing weeds from accumulating on the housing of the gearbox 6.

[0035] The spiral threads on the spiral conveyor shaft 5 of the left pulling roller assembly and the spiral threads on the spiral conveyor shaft 5 of the right pulling roller assembly are arranged alternately.

[0036] Weed removal pieces 11 are arranged at the front end of the spiral conveyor shaft. The weed removal pieces 11 are fixed on the guiding cone 7. The front end of the weed removal pieces 11 is provided with an edge, which is closely attached to the spiral conveyor shaft 5, preventing weeds from winding around the front end of the spiral conveyor shaft 5 and affecting the normal rotation of the spiral conveyor shaft 5.

[0037] The distance between the front ends of the inclined edges 401 of two adjacent cutters 6 on the left pulling roller assembly and the right pulling roller assembly is approximately 2 - 3 mm, and the rear ends of the two blades of the inclined edge 401 are tangent to the same circle.

[0038] The usage method of the utility model is as follows: When the header works, the transmission 6 drives the main shaft 2 of the pulling roller to rotate. The corn straw in the front is guided by the guiding cone 7, and then the corn straw is conveyed into the space between the left pulling roller assembly and the right pulling roller assembly through the spiral conveying shaft 5. The pulling plate 3 and the cutter 4 on the main shaft 2 of the pulling roller pull down and evenly cut the corn straw, thus completing the cutting of the corn straw.

Claims

1. A corn harvesting header cutting device, characterized in that: The invention comprises a left stem pulling roller assembly and a right stem pulling roller assembly which are symmetrically arranged on a frame body (1) about an axis. The left stem pulling roller assembly and the right stem pulling roller assembly have the same structure and both comprise a stem pulling roller main shaft (2), a stem pulling plate (3), a cutter (4) and a spiral conveying shaft (5). The rear end of the stem pulling roller main shaft (2) is meshingly connected with a gearbox (6), and the front end of the stem pulling roller main shaft (2) is provided with a spiral conveying shaft (5). A plurality of cutters (4) are evenly fixed on the outer surface of the stem pulling roller main shaft (2). The plurality of cutters (4) are connected end to end to form a ring structure. The head end of each cutter (4) protrudes outward and is provided with an oblique blade (401). The outer side of each cutter (4) is provided with a stem pulling plate (3), and the stem pulling plate (3) is a bent plate composed of a horizontal plate (301) and a vertical plate (302). The horizontal plate (301) is fixed on the outer surface of the cutter (4), and the vertical plate (302) is adjacent to the head end of the cutter (4).

2. A corn harvesting header cutting device according to claim 1, characterized in that: The stem pulling roller main shaft (2) is a cube, and each face of the cube is provided with a plurality of threaded holes (201). Four cutters (4) are respectively fixed to the four faces of the stem pulling roller main shaft (2) by bolts, and two adjacent cutters (4) are arranged vertically end to end; and the outer side of each cutter (4) is respectively fixed to the horizontal plate (301) of the corresponding stem pulling plate (3) by bolts.

3. A corn harvesting header cutting device according to claim 2, characterized in that: The cutter (4) is provided with a plurality of straight slots matching the threaded holes (201), and the straight slots are used to adjust the installation position of the cutter (4) on the stem pulling roller main shaft (2), thereby changing the distance between two adjacent cutters (4) in the left stem pulling roller assembly and the right stem pulling roller assembly.

4. A corn harvesting header cutting device according to claim 1 or 2, characterized in that: The front end of the spiral conveying shaft (5) is fixedly connected to the guide cone (7) via a bearing inside the spiral conveying shaft (5); the guide cone (7) is connected to the frame body (1) via a U-shaped support plate (8) with bolts.

5. A corn harvesting header cutting device according to claim 1 or 2, characterized in that: A grass picking plate (9) is provided at the lower end of the frame body (1), and the front end of the grass picking plate (9) is bent and provided with a blade tip (901).

6. A corn harvesting header cutting device according to claim 1 or 2, characterized in that: The bending part of the stem pulling plate (3) is provided with a chamfer.

7. A corn harvesting header cutting device according to claim 1 or 2, characterized in that: A guide key is provided at the rear end of the spiral conveying shaft (5), and the guide key and the cutter (4) are arranged on the same plane.

8. A corn harvesting header cutting device according to claim 1 or 2, characterized in that: A grass baffle (10) is provided at the rear ends of the left stem pulling roller assembly and the right stem pulling roller assembly. The front end edge of the grass baffle (10) is semicircular, and the rear end is fixedly connected to the housing of the gearbox (6).

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