Grain harvester

Abstract

The invention discloses a grain harvester which comprises a rack and a chopping mechanism, the chopping mechanism comprises a fixed cutter assembly and a chopping roller assembly, and the chopping roller assembly is provided with a movable cutter; the machine further comprises an adjusting mechanism assembly, the adjusting mechanism assembly comprises an adjusting part and a mounting position arranged on the side wall of the machine frame, the stationary knife assembly is arranged at one end of the adjusting part, and the other end of the adjusting part is connected with the mounting position. According to the invention, after the stationary knife assembly is mounted on the rack, the stationary knife assembly is secondarily fixed by utilizing the matching of an adjusting part and a mounting position in the adjusting mechanism assembly, and when the stationary knife assembly tends to move downwards, the connection between the adjusting part and the mounting position can prevent the stationary knife assembly from descending, so that the distance between a stationary knife and a movable knife is prevented from being increased, and the service life of the stationary knife assembly is prolonged. Therefore, the chopping effect is prevented from being influenced.

Description

Technical Field

[0001] The invention relates to a grain harvester, in particular to a grain harvester with an adjustable crushing mechanism. Background Art

[0002] The shredding mechanism of a grain harvester is a mechanism that shreds the entire section of straw and impurities. Some existing harvesters are equipped with shredding or crushing devices. At present, the shredding effect of some shredding mechanisms is not very good. After harvesting, the straw and impurities will still be difficult to decompose and have a long decomposition cycle. The shredded straw cannot be too long, otherwise its working effect will affect the sowing and growth of the next crop. Therefore, in order to adjust the shredding effect of the shredding mechanism, the distance between the moving knife and the fixed knife in the shredding mechanism is designed to be adjustable, and a better shredding effect can be obtained by adjusting the distance between the moving knife and the fixed knife.

[0003] For example, Chinese patent document CN207151249U discloses a grain combine harvester and its threshing and separation device. In order to achieve the adjustable chopping length and scattering width of the stem by the stem chopping and scattering device, in the stem chopping and scattering device disclosed in the grain combine harvester of the patent document, the stem chopping length is determined by the size of the front-to-back overlap between the fixed blade and the movable blade. The larger the overlap, the shorter the stem chopping length; the smaller the overlap, the longer the stem chopping length. The overlap can be adjusted. When adjusting, the adjustment handle is pulled forward and backward, and the adjustment handle drives the fixed blade to rotate, thereby changing the radial overlap between the fixed blade and the movable blade, thereby achieving the purpose of adjusting the stem chopping length. When the adjustment handle is pulled backward, the fixed blade rotates counterclockwise, the radial overlap with the movable blade is reduced, and the stem chopping length is lengthened; when the adjustment handle is pulled forward, the fixed blade rotates clockwise, the radial overlap with the movable blade is increased, and the stem chopping length is reduced. In other ways, the front-to-back overlap between the fixed blade and the movable blade can also be adjusted by pushing the fixed blade forward and backward by the adjustment handle.

[0004] Another example is Chinese patent document CN101548610A, which discloses a straw chopping device for a combine harvester, comprising a housing connected to a threshing drum, wall panels are provided on the left and right sides of the housing, a rear baffle is provided at the rear end of the housing, a bottom plate is installed at the bottom of the housing, a knife roller mechanism is installed horizontally between the wall panels of the housing, a plurality of movable knife mechanisms are installed in an annular manner along the axial direction of the knife roller mechanism, two movable blades installed in parallel are provided on the movable knife roller mechanism, a fixed blade is provided on the bottom plate and arranged staggered with the position of the movable blade, a long groove is provided on one side of the wall panel corresponding to the installation position of the bottom plate, a pin is provided on one side of the bottom plate, the pin is installed in the long groove, a fastening nut is installed at the end of the pin, and the distance between the fixed blade and the movable blade can be changed by adjusting the longitudinal sliding of the pin in the long groove to adapt to the passage of straws of different lengths. In the prior art, the fixed blade position is kept stable by tightening the pin in the long groove. However, after long-term cutting operation, the distance between the fixed blade and the movable blade will gradually increase, thereby affecting the cutting effect. Summary of the invention

[0005] In order to solve the technical problem in the prior art that the distance between a fixed knife and a movable knife gradually becomes larger, thus affecting the shredding effect, the present invention provides a grain harvester, comprising a frame and a shredding mechanism, the shredding mechanism comprising a fixed knife assembly and a shredding roller assembly, the shredding roller assembly being provided with a movable knife; wherein: it also includes an adjusting mechanism assembly, the adjusting mechanism assembly comprising an adjusting member and a mounting position arranged on a side wall of the frame, the fixed knife assembly being arranged at one end of the adjusting member, and the other end of the adjusting member being connected to the mounting position.

[0006] In the prior art, during the shredding process, the fixed knife will also be subjected to the force and tend to move downward. After a long period of shredding operation, the fixed knife will move downward, which will increase the distance between the moving knife and the fixed knife, and ultimately affect the cutting effect. Therefore, in this solution, after the fixed knife assembly is installed on the frame, the fixed knife assembly is fixed for a second time by using the cooperation between the adjustment member in the adjustment mechanism assembly and the mounting position. When the fixed knife assembly tends to move downward, the connection between the adjustment member and the mounting position can prevent the fixed knife assembly from falling, thereby preventing the distance between the fixed knife and the moving knife from increasing, so as to prevent the shredding effect from being affected.

[0007] Preferably, the adjusting member is provided with a position-adjustable fixing member, and the adjusting member is connected to the mounting position through the fixing member. Since the position of the fixed knife assembly on the frame is adjustable, when the position of the fixed knife assembly changes, the distance between the adjusting member and the mounting position also needs to change accordingly. In this solution, the position between the adjusting member and the mounting position is adjustable through the cooperation of the adjusting member and the fixing member, so as to ensure that the position of the fixed knife assembly can be adjusted normally, the structure is simple, and the cost of the device can be reduced.

[0008] Preferably, a mounting plate is provided on the side wall of the frame, and the mounting position is arranged on the mounting plate. This solution can realize the arrangement of the mounting position on the side wall of the frame, and the structure is simple.

[0009] Preferably, the mounting plate is located outside the rack. In this solution, the mounting plate is arranged outside the rack to facilitate the position adjustment of the adjusting member.

[0010] Preferably, the fixing member is a nut, and the mounting position is a mounting hole matching the adjusting member. This solution can quickly adjust the adjusting member and has a simple structure.

[0011] Preferably, two fixing members are provided on the adjusting member, and the two fixing members are respectively located on both sides of the mounting position. This solution can ensure a stable connection between the adjusting rod and the mounting position after the adjustment is completed, and avoid displacement of the adjusting rod during use, so as to ensure the best shredding effect, and the structure is simple.

[0012] Preferably, a cutting concave plate is provided on the frame, and the fixed knife assembly is connected to the cutting concave plate. This solution can ensure the normal cutting operation and has a simple structure.

[0013] Preferably, both sides of the cutting concave plate are connected to the adjusting member via a fixed shaft. This solution realizes the arrangement of the adjusting member on the cutting concave plate, and has a simple structure.

[0014] Preferably, the fixed knife assembly includes a fixed knife and a fixed knife seat, the fixed knife is fixed on the fixed knife seat, the fixed knife seat is connected to the shredding concave plate, and the position of the fixed knife seat on the shredding concave plate is adjustable. In this solution, the design of adjustable position between the fixed knife seat and the shredding concave plate can realize secondary adjustment of the distance between the fixed knife and the moving knife, increase the adjustment range of the distance between the fixed knife and the moving knife, improve the application range of the shredding mechanism, and have a simple structure.

[0015] Preferably, the shredding concave plate includes a fixed knife limiter, and adjustment plates are provided on both sides of the fixed knife limiter, and adjustment holes of different heights are provided on the adjustment plates, and the fixed knife seat is connected to one of the adjustment holes through a connecting piece. This solution realizes the position adjustment of the fixed knife seat on the shredding concave plate, and the structure is simple.

[0016] Preferably, the adjustment plate is located on the side of the shredding concave plate away from the shredding roller assembly, and the fixed knife limiting portion is provided with a fixed knife hole for the fixed knife to pass through. This solution can avoid the interference of the adjustment plate on the shredding operation and has a simple structure.

[0017] Preferably, the shredding concave plate is provided with a plurality of working areas located on both sides of the fixed knife limiting portion, and the working areas include the concave plate rod and the partitions on both sides. This solution can ensure the normal shredding operation and has a simple structure.

[0018] Preferably, the working area also includes a sealing plate for shielding the concave plate rod. This solution can ensure the normal shredding operation and has a simple structure.

[0019] Preferably, the sealing plate is detachably connected in the working area. This solution facilitates the removal of the sealing plate, thereby facilitating the cleaning of the accumulated materials in the working area, and has a simple structure.

[0020] Preferably, the shredding roller assembly includes a moving knife mechanism, which includes a knife shaft, on which a moving knife seat is spirally distributed, and the moving knife is mounted on the moving knife seat. This solution realizes the installation of the moving knife on the knife shaft, and has a simple structure.

[0021] Preferably, the movable knife is detachably connected to the movable knife seat. This solution facilitates the maintenance of the movable knife.

[0022] Preferably, the knife shaft comprises transmission shafts at both ends and a knife shaft tube in the middle, and fixing plates are provided at both ends of the knife shaft tube, and the fixing plates are connected to the transmission shaft. This solution facilitates the connection between the knife shaft and the transmission shaft and has a simple structure.

[0023] Preferably, the chopping roller assembly further comprises a pulley for driving the transmission shaft to rotate, and the pulley is provided with a belt groove. In this solution, the rotation speed of the transmission shaft can be adjusted by selecting different belt grooves, so that the rotation speed of the moving knife can be adjusted to improve the harvesting efficiency.

[0024] The present invention has the following beneficial effects: 1. After the fixed knife assembly is installed on the frame in the present invention, the fixed knife assembly is fixed for a second time by using the cooperation between the adjusting member in the adjusting mechanism assembly and the mounting position. When the fixed knife assembly tends to move downward, the connection between the adjusting member and the mounting position can prevent the fixed knife assembly from falling, thereby preventing the distance between the fixed knife and the movable knife from increasing, so as to prevent the shredding effect from being affected.

[0025] 2. The present invention can ensure a stable connection between the adjusting rod and the mounting position after the adjustment is completed, avoiding displacement of the adjusting rod during use, thereby ensuring the best shredding effect and having a simple structure.

[0026] 3. The present invention can realize secondary adjustment of the distance between the fixed knife and the movable knife through the design of adjustable position between the fixed knife seat and the shredding concave plate, thereby increasing the adjustment range of the distance between the fixed knife and the movable knife and improving the application range of the shredding mechanism.

[0027] 4. The rotating speed of the moving knife in the present invention is adjustable, which can improve the harvesting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A partial cross-sectional view of an embodiment of a grain harvester of the present invention; Figure 2 for Figure 1 A partial schematic diagram of the shredding mechanism; Figure 3 for Figure 2 A schematic diagram of the structure of the middle shredder roller assembly; Figure 4 for Figure 3 Schematic diagram of the structure of the middle knife shaft; Figure 5 for Figure 4 Left view of Figure 6 for Figure 3 Schematic diagram of the structure of the middle moving knife; Figure 7 It is a structural schematic diagram of the fixed knife seat; Figure 8 It is a structural schematic diagram of the fixed knife assembly; Fig. 9 It is the structural schematic diagram of the fixed knife; Fig.10 The schematic diagram of the structure of the cutting concave plate ①; Fig.11 The schematic diagram of the structure of the cutting concave plate is shown in FIG2; Fig.12 The schematic diagram of the structure of the cutting concave plate ③; Fig.13 It is a structural schematic diagram of the adjustment mechanism assembly; Fig.14 for Figure 1 A is an enlarged schematic diagram. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: knife shaft 1, movable knife seat 2, movable knife 3, connecting plate 4, shredding concave plate 5, fixed knife 6, adjusting member 7, fixing member 8, pulley 9, mounting plate 10, transmission shaft 11, fixing plate 12, fixed knife seat 13, connecting member 14, concave plate rod 15, partition plate 16, fixed knife limit part 17, adjusting plate 18, fixed knife hole 19, sealing plate 20, fixed shaft 21, protective plate 22, connecting part 23.

[0030] The embodiment is basically as shown in the attached Figure 1-Figure 14 As shown: a grain harvester comprises a frame and a chopping mechanism, wherein the chopping mechanism comprises a fixed knife assembly, a chopping roller assembly and an adjusting mechanism assembly, wherein the chopping roller assembly is provided with a moving knife 3, and the fixed knife assembly is provided with a fixed knife 6.

[0031] like Fig.13 and Fig.14 As shown, the adjustment mechanism assembly includes an adjustment member 7 and a mounting position on the side wall of the frame, the fixed knife assembly is arranged at one end of the adjustment member 7, and the other end of the adjustment member 7 is connected to the mounting position. The adjustment member 7 is provided with a position-adjustable fixing member 8, and the adjustment member 7 is connected to the mounting position through the fixing member 8. Specifically, a mounting plate 10 is provided on the outer wall of the frame, the mounting position is arranged on the mounting plate 10, the fixing member 8 is a nut, and the mounting position is a mounting hole matching the adjustment member 7. Two fixing members 8 are arranged on the adjustment member 7, and the two fixing members 8 are respectively located on both sides of the mounting position. A shredding concave plate 5 is provided on the frame, and both sides of the shredding concave plate 5 are connected to the adjustment member 7 through a fixed shaft 21. The fixed shaft 21 passes through the protective plate 22 and is connected to the adjustment member 7. A flat washer and a cotter pin are installed at the right end of the fixed shaft 21. A protruding connecting portion 23 is provided on the outer wall of the frame, and the protective plate 22 is slidably connected to the connecting portion 23. A slot for the adjustment member 7 to move up and down is provided on the connecting portion 23.

[0032] like Figure 7 , Figure 8 and Fig. 9As shown, the fixed knife assembly is connected to the shredding concave plate 5. Specifically, the fixed knife assembly includes a fixed knife 6 and a fixed knife seat 13, the fixed knife 6 is fixed on the fixed knife seat 13, the fixed knife seat 13 is connected to the shredding concave plate 5 and the position of the fixed knife seat 13 on the shredding concave plate 5 is adjustable. The shredding concave plate 5 includes a fixed knife limiting portion 17, and adjustment plates 18 are provided on both sides of the fixed knife limiting portion 17. The adjustment plates 18 are located on the side of the shredding concave plate 5 away from the shredding roller assembly, and the fixed knife limiting portion 17 is provided with a fixed knife hole 19 for the fixed knife 6 to pass through. The adjustment plate 18 is provided with adjustment holes of different heights, and the fixed knife seat 13 is connected to one of the adjustment holes through a connecting member 14. In this embodiment, the fixed knife assembly is provided with a total of 14 fixed knives 6, and each fixed knife 6 is installed on the fixed knife seat 13 with two sets of semicircular head square neck bolts, flat washers and locking nuts. The connecting member 14 is a sliding latch, and the two ends of the fixed knife seat 13 are equipped with a sliding latch, a latch spring, a flat washer and a cotter pin.

[0033] like Fig.10 , Fig.11 and Fig.12 As shown, the shredding concave plate 5 is provided with a plurality of working areas located on both sides of the fixed knife limiter 17, and the working areas include the concave plate rod 15 and the partitions 16 on both sides. The working areas are also provided with a detachable sealing plate 20 for shielding the concave plate rod 15. In this embodiment, the shredding concave plate 5 is provided with 12 working areas, 6 working areas on both sides of the fixed knife limiter 17, each working area is provided with a sealing plate 20, and each sealing plate 20 is installed using 2 sets of flange surface locking nuts and flange surface locking bolts.

[0034] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the shredder roller assembly includes a moving knife mechanism, which includes a knife shaft 1, on which a moving knife seat 2 is spirally distributed, and a moving knife 3 is mounted on the moving knife seat 2. The moving knife 3 is detachably connected to the moving knife seat 2. The knife shaft 1 includes a transmission shaft 11 at both ends and a knife shaft tube in the middle, and fixed plates 12 are provided at both ends of the knife shaft tube, and the fixed plates 12 are connected to the transmission shaft 11. The moving knife 3 is as shown in FIG. Figure 6 shown.

[0035] The shredder roller assembly further comprises a pulley 9 for driving the transmission shaft 11 to rotate, and a belt groove is provided on the pulley 9.

[0036] In this embodiment, the shredder roller assembly is provided with 28 moving knives 3, and moving knife seats 2 are distributed on the knife shaft 1 in two spiral lines, and 14 moving knife seats 2 are distributed on each spiral line. The moving knives 3 are installed on the moving knife seats 2 with flange locking nuts and flange bolts. The left and right ends of the knife shaft 1 are both installed with connecting plates 4, protective welding joints and outer spherical bearings, and the connecting plates 4, protective welding joints and outer spherical bearings are installed on the knife shaft 1 with four sets of bolts, spring washers and flat washers. The pulley 9 is installed on the right end of the knife shaft 1 with a set of flat keys, flange bolts and retaining rings.

[0037] The specific implementation process is as follows: After the grain harvester is started, the transmission shaft 11 rotates to drive the chopping roller assembly to rotate. The movable knife 3 moves and then cooperates with the fixed knife 6 to complete the chopping operation. When the distance between the movable knife 3 and the fixed knife 6 needs to be adjusted, there are two ways to adjust it. One is to adjust the position of the fixed knife seat 13 on the adjustment plate 18. Fig.12 As shown, the adjustment plate 18 is provided with two adjustment holes, namely, the adjustment hole 18a and the adjustment hole 18b. When the connecting member 14 is in the adjustment hole 18a, the distance between the fixed knife 6 and the movable knife 3 is closer, and when the connecting member 14 is in the adjustment hole 18b, the distance between the fixed knife 6 and the movable knife 3 is farther. The second method is to use the adjustment mechanism assembly to adjust the position of the shredding mechanism. By adjusting the position of the fixing member 8 on the adjustment member 7, the shredding mechanism can be driven to move up and down. Since the fixed knife assembly is installed on the shredding concave plate 5, the fixed knife assembly will also move up and down with the shredding concave plate 5, thereby changing the distance between the movable knife 3 and the fixed knife 6.

[0038] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A grain harvester, comprising a frame and a chopping mechanism, wherein the chopping mechanism comprises a chopping roller assembly and a fixed knife assembly whose position is adjustable on the frame, and the chopping roller assembly is provided with a moving knife; characterized in that: It also includes an adjustment mechanism assembly, which includes an adjustment member and a mounting position arranged on the side wall of the frame, one end of the adjustment member is connected to the fixed knife assembly, and the other end of the adjustment member is connected to the mounting position.

2. The grain harvester according to claim 1, characterized in that: The adjusting member is provided with a fixing member with adjustable position, and the adjusting member is connected to the installation position through the fixing member.

3. The grain harvester according to claim 2, characterized in that: A mounting plate is provided on the side wall of the frame, and the mounting position is arranged on the mounting plate.

4. The grain harvester according to claim 3, characterized in that: The mounting plate is located outside the frame.

5. The grain harvester according to claim 4, characterized in that: The fixing member is a nut, and the mounting position is a mounting hole matching the adjusting member.

6. The grain harvester according to claim 5, characterized in that: The fixing members are provided with two on the adjusting member, and the two fixing members are respectively located at two sides of the installation position.

7. The grain harvester according to any one of claims 1 to 6, characterized in that: The frame is provided with a cutting concave plate, and the fixed knife assembly is connected to the cutting concave plate.

8. The grain harvester according to claim 7, characterized in that: Both sides of the cutting concave plate are connected with the adjusting member through a fixed shaft.

9. The grain harvester according to claim 8, characterized in that: The fixed knife assembly comprises a fixed knife and a fixed knife seat, the fixed knife is fixed on the fixed knife seat, the fixed knife seat is connected to the cutting concave plate, and the position of the fixed knife seat on the cutting concave plate is adjustable.

10. The grain harvester according to claim 9, characterized in that: The shredding concave plate comprises a fixed knife limiting portion, and adjustment plates are arranged on both sides of the fixed knife limiting portion. The adjustment plates are provided with adjustment holes at different heights, and the fixed knife seat is connected to one of the adjustment holes through a connecting piece.

11. The grain harvester according to claim 10, characterized in that: The adjusting plate is located on a side of the shredding concave plate away from the shredding roller assembly, and the fixed knife limiting portion is provided with a fixed knife hole for the fixed knife to pass through.

12. The grain harvester according to claim 11, characterized in that: The cutting concave plate is provided with a plurality of working areas located on both sides of the fixed knife limiting portion, and the working areas include a concave plate rod and partitions on both sides.

13. The grain harvester according to claim 12, characterized in that: The working area also includes a sealing plate for shielding the concave plate rod.

14. The grain harvester according to claim 13, characterized in that: The sealing plate is detachably connected in the working area.

15. The grain harvester according to claim 14, characterized in that: The shredding roller assembly comprises a moving knife mechanism, and the moving knife mechanism comprises a knife shaft, a moving knife seat is spirally distributed on the knife shaft, and the moving knife is installed on the moving knife seat.

16. The grain harvester according to claim 15, characterized in that: The movable knife is detachably connected to the movable knife seat.

17. The grain harvester according to claim 16, characterized in that: The knife shaft comprises transmission shafts at two ends and a knife shaft tube in the middle. Fixed plates are provided at both ends of the knife shaft tube, and the fixed plates are connected to the transmission shaft.

18. The grain harvester according to claim 17, characterized in that: The shredder roller assembly also includes a pulley for driving the transmission shaft to rotate, and a belt groove is provided on the pulley.

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