Straw chopping flail knife device of corn header

Abstract

The utility model belongs to the field of agricultural machinery, and particularly relates to a straw chopping flail knife device of a corn header. The device comprises a flail knife holder welding body, two lifting oil cylinders are symmetrically connected to the positions, close to the two ends, of the flail knife holder welding body, a transmission box is arranged on the flail knife holder welding body, a plurality of rotatable flail knife assemblies are evenly installed on the front portion of the flail knife holder welding body in the longitudinal direction of the flail knife holder welding body, and the output end of the transmission box is in transmission connection with the upper ends of flail knife shafts of the flail knife assemblies. The rotating shaft is used for driving the flail knife assemblies to rotate simultaneously; connecting plates are fixed to the outer sides of baffles at the two ends of a flail knife holder welding body respectively, profiling sensor assemblies are installed in the middles of the connecting plates, and the lower ends of lower supporting rods of the profiling sensor assemblies are dragged to the ground and used for detecting the distance between the device and the ground, so that stretching and retracting of the two lifting oil cylinders are controlled. The device can realize high uniformity of straw stubbles, and is low in failure rate and convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, specifically relating to a corn harvester stalk chopping and throwing device. Background Technology

[0002] As is well known, straw chopping blades are usually installed on corn harvesters, enabling the harvester to chop straw while simultaneously picking ears of corn.

[0003] Currently, most shredding blades are connected to one side of the ear-picking gearbox via a shredding gearbox, such as the corn ear-picking mechanism unit with straw shredding function disclosed in patent announcement number CN220274292U. During operation, the ear-picking gearbox drives the shredding gearbox, which in turn drives the shredding blade to rotate, thus shredding the straw. Because the angle between the shredding blade and the header is fixed in this structure, it rises and falls with the header. When the corn height in the field is inconsistent, this results in uneven straw stubble height, leading to poor performance. Furthermore, this type of shredding blade uses gearbox transmission, resulting in numerous internal parts, a high failure rate, and difficult maintenance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a corn header stalk chopping and throwing device that can achieve uniform stalk height, low failure rate, and is easy to disassemble and maintain.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A corn harvester stalk chopping and throwing blade device includes a throwing blade seat welded assembly, two lifting cylinders symmetrically connected to the throwing blade seat welded assembly and a transmission box provided thereon, and multiple rotatable throwing blade assemblies evenly distributed along the longitudinal direction at the front of the throwing blade seat welded assembly. The output end of the transmission box is connected to the upper end of the throwing blade shaft of the multiple throwing blade assemblies for driving the multiple throwing blade assemblies to rotate simultaneously.

[0007] Connecting plates are fixed to the outer sides of the baffles at both ends of the welded assembly of the slinger holder. A contour sensor assembly is installed in the middle of the connecting plate. The lower end of the lower support rod of the contour sensor assembly drags to the ground to detect the distance between the device and the ground, thereby controlling the extension and retraction of the two lifting cylinders.

[0008] A further improvement of the present invention is that the welded assembly of the slinger seat includes multiple evenly distributed support angle steels, a channel-shaped plate frame and a rear cover plate arranged in the front and rear are fixed on the multiple support angle steels, baffles are fixed at both ends of the channel-shaped plate frame and the rear cover plate, and a wedge-shaped guide plate is fixed on the front side of the channel-shaped plate frame.

[0009] A further improvement of the present invention is that the transmission box includes a housing, in which an input shaft and an output shaft perpendicular to each other are installed. The input shaft and the output shaft are connected by a bevel gear pair. The input shaft is led out from one side of the housing and connected to a drive shaft via a universal joint for connecting to the drive shaft on the cutting table. The output shaft is led out from the bottom of the housing.

[0010] A further improvement of this utility model is that: multiple sliding plates are installed in the grooved plate frame through a slide formed by a pair of pressure plates; the shaft seat of the blade assembly passes through the grooved plate frame and the sliding plate and is fixed on the corresponding sliding plate; two strip holes are symmetrically provided on the sliding plate on both sides of the blade assembly; the sliding plate is fixed to the grooved plate frame by fixing bolts passing through the strip holes, so as to adjust the position of each blade assembly.

[0011] A further improvement of the present invention is that the blade assembly includes a bearing seat, a blade shaft is mounted in the bearing seat via a bearing, and two blades are symmetrically hinged at the lower end of the blade shaft via a rotating blade holder arranged vertically and a lower clamping plate.

[0012] A further improvement of this utility model is that: the two ends of the connecting plate are respectively fixed to the corresponding baffles by pins, and connecting frames are hinged on the pins at both ends of the connecting plate to facilitate the connection of the corn cutter.

[0013] A further improvement of this utility model is that a long rod is inserted between the baffles at both ends of the welded body of the slinger seat, and an iron chain curtain is fitted on the long rod to prevent the straw from splashing after being chopped.

[0014] A further improvement of this utility model is that the welded assembly of the blade holder and the cylinder rod of the lifting cylinder are connected by an iron chain to achieve a flexible connection with the corn header.

[0015] A further improvement of this utility model is that brackets are fixed on the outer sides of the baffles at both ends of the welded assembly of the blade holder to prevent the blade from hitting the soil.

[0016] The technological advancement achieved by this utility model is:

[0017] 1. Because contour sensor assemblies are respectively installed on the outer side of the baffles at both ends of the welded body of the shovel holder, and the lower end of the lower support rod of the contour sensor assembly drags to the ground, the distance between the device and the ground can be detected, thereby controlling the extension and retraction of the two lifting cylinders, so that the device can automatically adjust its height according to the changes in the ground, thereby achieving uniform straw stubble height.

[0018] 2. Because the device is independently installed under the corn cutter table by two lifting cylinders and connecting frame, it is easy to disassemble and replace parts, and is convenient to maintain. At the same time, the transmission shaft connected to the input shaft of the transmission box is connected to the drive shaft on the cutter table, which realizes the cutting of straw without a cutting gearbox, solving the problems of high failure rate and easy damage of the cutting gearbox, resulting in low failure rate and long service life. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention.

[0020] Figure 2 This is a bottom view of the present invention.

[0021] Figure 3 This is a side sectional view of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 5 This is an installation diagram of this utility model.

[0024] In the diagram: 1. Lifting cylinder; 2. Front cover plate; 3. Welded assembly of the slinger seat; 4. Drive shaft; 5. Transmission box; 6. Contouring sensor assembly; 7. Slinger assembly; 8. Belt drive mechanism; 9. Pressure plate; 10. Sliding plate; 11. Connecting plate; 12. Bracket; 13. Iron chain curtain; 14. Connecting frame; 15. Iron chain. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, this utility model relates to a corn harvester stalk chopping and throwing blade device, including a throwing blade seat welded assembly 3. The throwing blade seat welded assembly 3 includes multiple evenly distributed supporting angle steels 306. A channel-shaped plate frame 301 and a rear cover plate 302 arranged front and rear are welded to the multiple supporting angle steels. Baffles 303 are welded to both ends of the channel-shaped plate frame and the rear cover plate. A wedge-shaped guide plate 304 is welded to the front side of the channel-shaped plate frame. A transmission box bracket 305 is welded to the rear cover plate 302. Three front cover plates 2 are fixed to the channel-shaped plate frame 301 with screws to cover the cavity inside the channel-shaped plate frame 301.

[0027] Two lifting cylinders 1 are symmetrically connected near both ends on the rear cover plate of the blade holder welded assembly 3 for connecting the corn cutter; a transmission box 5 is fixed on the rear cover plate 302 via the transmission box bracket 305; multiple rotatable blade assemblies 7 are evenly installed along the longitudinal direction in the grooved plate frame at the front of the blade holder welded assembly 3; the output end of the transmission box 5 is connected to the upper end of the blade shaft of the multiple blade assemblies 7 for driving the multiple blade assemblies 7 to rotate simultaneously.

[0028] The transmission box 5 includes a housing. Inside the housing, an input shaft and an output shaft, perpendicular to each other, are mounted via bearings. The input and output shafts are connected by a bevel gear pair. The input shaft extends from one side of the housing and is connected to a drive shaft 4 via a universal joint, for connecting to the drive shaft on the cutting table. The output shaft extends from the bottom of the housing. In this embodiment, four blade-slinging assemblies 7 are used as an example. The lower end of the output shaft is connected to the upper end of the blade-slinging shafts of the two blade-slinging assemblies 7 closest to the transmission box 5 via belt drive mechanisms 8. Adjacent blade-slinging shafts of the three blade-slinging assemblies 7 on the left side are connected via belt drive mechanisms 8.

[0029] The slinger assembly 7 includes a cylindrical hollow shaft seat 701, a slinger shaft 702 is mounted inside the shaft seat via bearings, a rotating tool holder 703 is mounted at the lower end of the slinger shaft via splines, a lower clamping plate 704 is connected to the rotating tool holder via square neck bolts, and two slinger blades 705 are symmetrically hinged on the square neck bolts between the rotating tool holder and the lower clamping plate.

[0030] Multiple sliding plates 10 are installed in the grooved plate frame through slides formed by a pair of pressure plates 9. The shaft seat of the slinger assembly 7 passes through the grooved plate frame and the sliding plate 10 and is welded to the corresponding sliding plate 10. Two strip holes are symmetrically provided on the sliding plate 10 on both sides of the slinger assembly 7. The sliding plate 10 is fixed to the grooved plate frame 301 by fixing bolts passing through the strip holes so as to adjust the relative position of each slinger assembly 7.

[0031] Connecting plates 11 are fixed to the outer sides of the baffles at both ends of the welded assembly 3 of the cutter head. A contour sensor assembly 6 is installed in the middle of the connecting plate 11. The lower end of the lower support rod of the contour sensor assembly 6 drags on the ground to detect the distance between the device and the ground, thereby controlling the extension and retraction of the two lifting cylinders 1. The contour sensor assembly 6 adopts a contour device for the header of a corn combine harvester disclosed in patent announcement number CN217825997U, which is welded to the connecting plate 11 via a sensor mounting base.

[0032] The two ends of the connecting plate 11 are fixed to the corresponding baffles 303 by pins. A connecting frame 14 is hinged to the pins at both ends of the connecting plate 11. The connecting frame 14 and the connecting plate 11 form a parallelogram mechanism to facilitate connection to the corn cutter and assist in the extension and retraction adjustment of the lifting cylinder 1.

[0033] A long rod is inserted between the baffles at both ends of the cutter head welded assembly 3. Several iron chain curtains 13 are fitted onto the long rod to prevent straw from splashing after being chopped. The cutter head welded assembly 3 is connected to the cylinder rod of the lifting cylinder 1 by an iron chain 15 to achieve a flexible connection with the corn cutter head, so that the lower support rod of the contour sensor assembly 6 can automatically lift when it encounters a protruding ground. Brackets 12 are fixed to the outside of the baffles at both ends of the cutter head welded assembly 3 by bolts. The bottom surface of the brackets 12 is a boat-shaped baffle to prevent the cutter head from hitting the soil.

[0034] During installation, if Figure 5 As shown, the components of the device are assembled together by the blade holder welded assembly 3, and hoisted to the bottom of the corn cutter table by the lifting cylinder 1 and the connecting frame 14. They are then connected to the drive shaft on the cutter table by the transmission shaft 4 and the belt drive mechanism.

[0035] During operation, the lower end of the lower support rod of the contour sensor assembly 6 is dragged to the ground to detect the distance between the device and the ground. When a change in distance is detected, the angle sensor of the contour sensor assembly 6 outputs a rotation angle signal to the hydraulic control system of the corn harvester. The control system controls the lifting cylinder 1 to push out or retract based on the feedback data, thereby adjusting the height of the device. At the same time, the connecting frame will also adjust according to the height change of the device.

[0036] The corn harvester outputs power to drive the header, which in turn drives the transmission shaft 4 to rotate. This rotation, via the transmission box 5 and belt drive mechanism, drives the blades of multiple stalk-splitting assemblies 7 to rotate simultaneously, thus achieving the straw chopping function. The chopped straw is blocked by the iron chain curtain 13 and falls to the ground, preventing the straw from scattering everywhere.

[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A corn harvester stalk chopping and shredding device, characterized in that: It includes a welded assembly of a slinger base, on which two lifting cylinders are symmetrically connected and a transmission box is provided. Multiple rotatable slinger assemblies are evenly distributed along the longitudinal direction at the front of the welded assembly of the slinger base. The output end of the transmission box is connected to the upper end of the slinger shaft of the multiple slinger assemblies for driving the multiple slinger assemblies to rotate simultaneously. Connecting plates are fixed to the outer sides of the baffles at both ends of the welded assembly of the slinger. A contour sensor assembly is installed in the middle of the connecting plate. The lower end of the lower support rod of the contour sensor assembly drags to the ground to detect the distance between the device and the ground, thereby controlling the extension and retraction of the two lifting cylinders.

2. The corn header stalk chopping and shredding device according to claim 1, characterized in that: The welded assembly of the slinger seat includes multiple evenly distributed support angle steels, on which a channel-shaped plate frame and a rear cover plate are fixed in the front and rear. Baffles are fixed at both ends of the channel-shaped plate frame and the rear cover plate, and a wedge-shaped guide plate is fixed at the front side of the channel-shaped plate frame.

3. The corn header stalk chopping and shredding device according to claim 1, characterized in that: The transmission box includes a housing, in which an input shaft and an output shaft perpendicular to each other are installed. The input shaft and the output shaft are connected by a bevel gear pair. The input shaft is led out from one side of the housing and connected to a drive shaft via a universal joint, which is used to connect to the drive shaft on the cutting table. The output shaft is led out from the bottom of the housing.

4. The corn header stalk chopping and shredding device according to claim 2, characterized in that: Multiple sliding plates are installed in the grooved plate frame through slides formed by a pair of pressure plates. The shaft seat of the slinger assembly passes through the grooved plate frame and the sliding plate and is fixed on the corresponding sliding plate. Two strip holes are symmetrically provided on the sliding plate on both sides of the slinger assembly. The sliding plate is fixed to the grooved plate frame by fixing bolts passing through the strip holes so as to adjust the position of each slinger assembly.

5. A corn harvester stalk chopping and shredding device according to claim 1 or 4, characterized in that: The slinger assembly includes a bearing seat, in which a slinger shaft is mounted via bearings, and at the lower end of the slinger shaft, two slinger blades are symmetrically hinged via a rotating tool holder arranged vertically and a lower clamping plate.

6. The corn header stalk chopping and shredding device according to claim 1, characterized in that: The two ends of the connecting plate are fixed to the corresponding baffles by pins, and connecting frames are hinged to the pins at both ends of the connecting plate to facilitate the connection of the corn cutter.

7. A corn header stalk chopping and shredding device according to claim 1 or 2, characterized in that: in A long rod is inserted between the baffles at both ends of the welded assembly of the shovel holder, and an iron chain curtain is fitted on the long rod to prevent the straw from splashing after being chopped.

8. A corn harvester stalk chopping and shredding device according to claim 1 or 2, characterized in that: The welded assembly of the blade holder is connected to the cylinder rod of the lifting cylinder by an iron chain, which is used to achieve a flexible connection between the device and the corn harvester.

9. A corn header stalk chopping and shredding device according to claim 8, characterized in that: in Brackets are fixed to the outer sides of the baffles at both ends of the welded assembly of the slinger to prevent the slinger from hitting the soil.

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