Movable cutter shaft assembly of rice straw chopper

Abstract

The utility model belongs to the technical field of rice combine harvesters, and particularly relates to a movable cutter shaft assembly of a rice straw chopper, which comprises a roller, two ends of the roller are fixedly connected with shaft heads, a plurality of cutter holders are arranged on the roller, movable cutters are arranged in the cutter holders, each cutter holder comprises a connecting part, and the connecting parts are fixedly connected with the roller. The end, away from the roller, of the connecting part is fixedly connected with a mounting part, and the width of the end, close to the roller, of the connecting part is larger than that of the end, close to the mounting part, of the connecting part. Through the integral structural design of the tool apron, the tool apron is firmer and more durable, and the quality problems of cracking, deformation, open welding and the like of the tool apron are effectively avoided; and through reasonable design of the tool apron and the movable tool mounting hole, the tool apron and the movable tool mounting hole are fixedly mounted together by using a standard hexagon bolt and a nut, so that the production cost is reduced, and the mounting is more convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of rice combine harvesters, and in particular relates to a moving blade shaft assembly of a rice straw shredder. Background Technology

[0002] Rice is usually harvested using rice combine harvesters, which can automatically cut, thresh, and screen rice, and classify the grains and straw. The grains are then transported to grain bins for storage.

[0003] Existing rice combine harvesters handle straw in two ways: one is to discharge it back into the field, and the other is to bale the straw. When discharging straw back into the field, the threshed rice straw is laid out on the ground to facilitate rotary tillage and burying of the straw. However, the straw discharged by existing rice combine harvesters is too long, making it inconvenient to operate during rotary tillage and burying, and it is easy for the straw to become entangled in the rotary tillage equipment, reducing the effectiveness of use.

[0004] Utility model patent application number CN202320089985.4 discloses a rice straw chopper, including a chopper support, a chopping chamber in the middle of the chopper support, a fixed blade assembly near its lower part inside the chopper support, and a moving blade assembly rotatably mounted inside the chopper support. The moving blade assembly cooperates with the fixed blade assembly to chop crop straw. The moving blade assembly includes a moving blade shaft, multiple moving blade mounting seats are mounted on the moving blade shaft, and moving blades are mounted on the moving blade mounting seats. The moving blades and moving blade mounting seats are positioned and connected by a positioning mounting assembly, which includes a fixing bolt. The fixing bolt includes a positioning end, a positioning shaft part, and a threaded shaft part integrally connected from left to right. However, the above structure has problems such as poor connection between the moving blade mounting seat and the moving blade shaft, complex fixing bolt structure, and cumbersome moving blade installation. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a rice straw chopper moving blade shaft assembly that has a sturdy and durable blade holder, a reliable connection, and convenient and quick blade installation.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A moving blade shaft assembly for a rice straw shredder includes a drum, with shaft heads fixedly connected to both ends of the drum. Multiple blade holders are provided on the drum, and moving blades are provided inside the blade holders. Each blade holder includes a connecting part, which is fixedly connected to the drum. An installation part is fixedly connected to the end of the connecting part away from the drum, and the width of the connecting part near the drum is greater than the width of the end near the installation part.

[0008] The following are further optimizations of the above technical solution by this utility model:

[0009] The connecting part and the mounting part are integrated into one structure.

[0010] Further optimization: An included angle α is provided between the two sides of the connecting part and the corresponding side of the mounting part, and the angle value of included angle α is 169°±2°.

[0011] Further optimization: The tool holder has an installation cavity, and hexagonal through holes and a first circular through hole are respectively opened on the two side walls of the tool holder. A second circular through hole is opened on the moving tool. After the second circular through hole is aligned with the hexagonal through hole and the first circular through hole, the moving tool is fixedly installed together with the tool holder by hexagonal bolts and nuts.

[0012] Further optimization: The moving tool includes a handle, which is slidably connected to the mounting cavity. A cutting head is fixed to the end of the handle away from the tool holder. Both sides of the cutting head are provided with cutting edges, which are arranged diagonally.

[0013] Further optimization: Flanges are fixed to the outer surfaces of the rollers near both ends, and counterweights are installed on the flanges.

[0014] Further optimization: The flange has multiple mounting holes for fixing the counterweight, and the mounting holes are arranged in a ring at intervals.

[0015] This utility model adopts the above-mentioned technical solution, with a reasonable structure. By increasing the contact area at the connection between the tool holder and the roller, the reliability of the connection between the tool holder and the roller is improved. Through the integrated structural design of the tool holder, the tool holder is made more robust and durable, effectively avoiding quality problems such as cracking, deformation, and weld failure. Through the rational design of the tool holder and the moving tool mounting hole, standard hexagonal bolts and nuts are used to fix the two together, reducing production costs and making installation more convenient.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the tool holder in an embodiment of the present utility model;

[0019] Figure 3 This is a front view of the tool holder in an embodiment of the present utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the moving blade in an embodiment of the present utility model;

[0021] Figure 5This is a schematic diagram of the mounting structure of the moving blade in an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the flange structure in an embodiment of this utility model.

[0023] In the figure: 1-Drum; 2-Shaft head; 3-Tool holder; 301-Connecting part; 302-Mounting part; 303-Mounting cavity; 4-Moving tool; 401-Tool holder; 402-Tool head; 403-Tool blade; 5-Flange; 501-Mounting hole. Detailed Implementation

[0024] like Figure 1-6 As shown: A moving blade shaft assembly for a rice straw shredder includes a drum 1, with shaft heads 2 fixedly connected to both ends of the drum 1. Multiple blade holders 3 are provided on the drum 1, and the multiple blade holders 3 are arranged in a spiral shape along the outer surface of the drum 1 and spaced apart. Moving blades 4 are provided inside the blade holders 3.

[0025] The tool holder 3 includes a connecting part 301, which is fixedly connected to the roller 1. A mounting part 302 is fixedly connected to the end of the connecting part 301 away from the roller 1. The width of the connecting part 301 near the roller 1 is greater than the width of the end near the mounting part 302.

[0026] This design increases the contact area at the connection between the tool holder 3 and the roller 1, thereby improving the reliability of the connection between the tool holder 3 and the roller 1.

[0027] An included angle α is provided between the two sides of the connecting part 301 and the corresponding sides of the mounting part 302, and the angle value of the included angle α is 169°±2°.

[0028] The tool holder 3 has a mounting cavity 303 for mounting the moving tool 4.

[0029] The cross-sectional shape of the mounting cavity 303 is rectangular.

[0030] The connecting part 301 and the mounting part 302 are integral structures, forged as one piece, which makes the tool holder 3 more robust and durable, and effectively avoids quality problems such as cracking, deformation and weld failure of the tool holder 3.

[0031] Hexagonal through holes and first circular through holes are respectively opened on the two side walls of the tool holder 3. A second circular through hole is opened on the moving tool 4 at the position corresponding to the hexagonal through hole and the first circular through hole. After the second circular through hole is aligned with the hexagonal through hole and the first circular through hole, the moving tool 4 is fixedly installed together with the tool holder 3 by hexagonal bolts and nuts.

[0032] With this design, the hexagonal bolts are standard parts that can be directly purchased from the market, which reduces production costs compared to custom-made fixing bolts and makes installation more convenient.

[0033] The moving blade 4 includes a handle 401, which is slidably connected to the mounting cavity 303. A blade head 402 is fixedly connected to the end of the handle 401 away from the blade holder 3.

[0034] The cross-sectional shape of the tool holder 401 is rectangular.

[0035] The blade 402 has blades 403 on both sides, and the two blades 403 are arranged diagonally.

[0036] With this design, when the working blade 403 wears out, the moving blade 4 can be reversed and reinstalled, and the other blade 403 can still be used, thereby improving the utilization rate of the moving blade 4.

[0037] Flanges 5 are fixed to the outer surfaces of roller 1 near both ends, and counterweights are installed on the flanges 5.

[0038] The flange 5 has multiple mounting holes 501 for fixing the counterweight, and the multiple mounting holes 501 are arranged in a ring at intervals.

[0039] This design, with one or more counterweights installed at one or more matching locations on flange 5, ensures dynamic balance during the rotation of the moving cutter shaft assembly, reducing vibration and noise during the operation of the shredder.

[0040] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A moving blade shaft assembly for a rice straw shredder, comprising a drum (1), with shaft heads (2) fixedly connected to both ends of the drum (1), and a plurality of blade holders (3) provided on the drum (1), with moving blades (4) provided inside the blade holders (3), characterized in that: The tool holder (3) includes a connecting part (301), which is fixedly connected to the roller (1). The end of the connecting part (301) away from the roller (1) is fixedly connected to the mounting part (302). The width of the connecting part (301) near the roller (1) is greater than the width of the end near the mounting part (302).

2. The moving blade shaft assembly of a rice straw shredder according to claim 1, characterized in that: The connecting part (301) and the mounting part (302) are an integral structure.

3. The moving blade shaft assembly of a rice straw shredder according to claim 2, characterized in that: An included angle α is provided between the two sides of the connecting part (301) and the corresponding sides of the mounting part (302), and the angle value of the included angle α is 169°±2°.

4. The moving blade shaft assembly of a rice straw shredder according to claim 3, characterized in that: The tool holder (3) has an installation cavity (303) inside. Hexagonal through holes and first circular through holes are respectively opened on the two side walls of the tool holder (3). The moving tool (4) has a second circular through hole. After the second circular through hole is aligned with the hexagonal through hole and the first circular through hole, the moving tool (4) is fixedly installed together with the tool holder (3) by hexagonal bolts and nuts.

5. The moving blade shaft assembly of a rice straw shredder according to claim 4, characterized in that: The moving knife (4) includes a handle (401), which is slidably connected to the mounting cavity (303). A blade head (402) is fixedly connected to one end of the handle (401) away from the knife holder (3). Blades (403) are provided on both sides of the blade head (402), and the two blades (403) are arranged diagonally.

6. The moving blade shaft assembly of a rice straw shredder according to claim 1, characterized in that: Flanges (5) are fixed to the outer surfaces of the roller (1) near both ends, and counterweights are installed on the flanges (5).

7. The moving blade shaft assembly of a rice straw shredder according to claim 6, characterized in that: The flange (5) has multiple mounting holes (501) for fixing the counterweight, and the multiple mounting holes (501) are arranged in a ring at intervals.

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