chaff cutter
By combining the chain plate and feeding roller with the shifting component, the problem of the inability to accurately control the feeding speed during the chopping process of the straw cutter is solved, realizing automated feeding and flexible control of the length of the chopped chips, thus improving the chopping quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN CHENGHONG MACHINERY EQUIPMENT CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing chaff cutters cannot precisely control the feed speed of raw materials during the chaff cutting process, resulting in inflexible chopped chip lengths that require manual intervention and affect the chaff cutting quality.
It adopts a combination structure of chain plate and feeding roller, and adjusts the raw material conveying speed through the shifting component to realize automated feeding and flexible control of the chopping chip length.
The automatic feeding of the chaff cutter has been realized, and the length of the chopped shreds can be flexibly adjusted as needed, thereby improving the chopping quality and operating efficiency.
Smart Images
Figure CN224521815U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chaff cutter technology, specifically a chaff cutter. Background Technology
[0002] A chaff cutter is an agricultural machine primarily used to cut crop stalks, forage grass, and other plant materials into short segments or fragments for easy feed processing, silage, or organic fertilizer preparation. Existing chaff cutters achieve efficient chopping of raw materials through the high-speed rotation of rotating blades. They are characterized by simple structure, convenient operation, and high production efficiency, and are widely used in livestock breeding and agricultural production. In traditional chaff cutters, the raw materials are manually fed into the feed inlet using a forklift. The motor drives the rotating blades to rotate at high speed, achieving the chopping process. However, with traditional chaff cutters, the raw materials tend to accumulate at the feed inlet, requiring manual assistance to push the material into the machine so that the rotating blades can quickly chop it. Furthermore, the feeding speed is often difficult to precisely control, resulting in an inability to effectively change the length of the chopped fragments and poor flexibility. Therefore, we propose the chaff cutter. Utility Model Content
[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a chaff cutter that can quickly and automatically feed materials through a chain plate and feeding rollers, avoiding manual intervention. Furthermore, it can change the material conveying speed by shifting gears; the faster the conveying speed, the longer the finished stubble, and vice versa, thus flexibly changing the length of the chopped stubble and improving the chaff cutting quality. This effectively solves the problems in the background technology.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a chaff cutter, comprising a base and a chaff cutting mechanism;
[0005] Base: It has a feeding rack at the rear of its upper end and a discharging rack at the front of its upper end;
[0006] The chaff-cutting mechanism includes a chaff cutter holder, transmission rollers, chain plates, feeding rollers, a drive assembly, and a shifting assembly. The chaff cutter holder is rotatably connected to the inside of the discharge frame. The transmission rollers are respectively located on the front and rear sides of the lower part of the feed frame, connected by a chain plate. The feeding roller is rotatably connected to the upper front side of the feed frame, and is fitted with the upper front side of the chain plate, providing a foundation for stable feeding of the chaff cutter. The drive assembly is located on the right side of the feed frame, and the shifting assembly is located on the left side. The chain plate and feeding rollers enable fast and automatic feeding, avoiding manual intervention. Furthermore, the shifting assembly can change the material conveying speed; a faster conveying speed results in a longer finished stubble, and vice versa, thus flexibly changing the length of the chopped stubble and improving the chaff-cutting quality.
[0007] Furthermore, the drive assembly includes a connecting shaft, a sprocket, and a transmission gear. The connecting shaft is rotatably connected to the upper front end inside the feed frame. Both the connecting shaft and the right end of the transmission roller are provided with sprockets. The two sprockets are connected by a chain drive. The outer right side of the transmission roller and the feeding roller are fixedly fitted with transmission gears. The two transmission gears are meshed and connected to provide a stable transmission effect for the feeding operation of the chaff cutter.
[0008] Furthermore, the drive assembly also includes a motor, a double-groove pulley, a first pulley, and a second pulley. The motor is located in the middle of the base, and its input is electrically connected to the output of the microcontroller. The double-groove pulley is located on the right side of the upper chaff cutter holder, and the first pulley is located on the right side of the lower chaff cutter holder. The left groove of the double-groove pulley is connected to the first pulley via a first belt. The second pulley is located at the right end of the motor's output shaft, and its right groove is connected to the second pulley via a second belt, providing a stable drive for the chaff cutter's cutting operation.
[0009] Furthermore, the shifting assembly includes gear one, gear two, a slider, gear three, and gear four. Gear one is fixedly sleeved on the left side of the outer surface of the upper chaff cutter frame, gear two is located on the left side of the upper chaff cutter frame, a shifting box is provided on the left side of the feed frame, the slider is slidably connected to the left side of the inside of the shifting box, gear three is rotatably connected to the middle of the inside of the slider, and the connecting shaft is slidably connected to the inner wall of gear three through the hexagonal head on the left side. Gear four is fixedly sleeved on the middle of the outer surface of gear three. Gear one and gear three are installed together, and gear two and gear four are installed together, providing a basis for the shifting operation of the chaff cutter.
[0010] Furthermore, the shifting assembly also includes a shift lever, a spring, a clearance opening, and a limiting groove. The shift lever connecting bracket is rotatably connected to the front right end of the slider. A spring is provided between the left side wall of the slider and the inner wall of the shift box. The spring is sleeved on the outer surface of the slider. A shift box cover is provided at the upper end of the shift box. The clearance opening is opened in the middle of the upper end of the shift box cover. The limiting grooves are all opened in front of the clearance opening. The limiting grooves are all inclined to the left. The inner walls of the clearance opening and the limiting grooves are fitted with the middle of the outer surface of the shift lever to provide a limiting effect for the shifting operation of the chaff cutter.
[0011] Furthermore, it also includes a strip-shaped opening and screws. The strip-shaped openings are respectively opened at the rear ends of the left and right sides of the feeding frame. The screws are slidably connected to the rear ends of the left and right sides of the feeding frame through angle irons. Right fixing bolts are provided on both the front and rear sides of the angle irons. The inner walls of the fixing bolts are threaded to the outer surface of the vertically adjacent screws. The left and right sides of the transmission roller located at the rear side are rotatably connected to the inner front side of the vertically adjacent screws through the inner walls of the strip-shaped openings, which can quickly adjust the tension of the chain plate.
[0012] Furthermore, it also includes a feed top cover and a baffle. The feed top cover is located on the upper front side of the feed frame, and the baffle is rotatably connected to the front side of the discharge frame, providing a basis for the stable feeding and discharging of the chaff cutter.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This chaff cutter has the following advantages:
[0014] 1. The rotation of the two drive rollers can drive the chain plate to rotate, causing the chain plate to rotate forward. Combined with the forward rotation of the feeding roller, it can form a forward clamping and conveying effect on the raw material, so that the raw material can be stably conveyed forward, realizing automatic feeding of raw materials and avoiding manual intervention.
[0015] 2. By changing the position of the slider, the positions of gear three and gear four can be changed, realizing the meshing and disengagement of different gears. In conjunction with the shift lever and the limiting groove, the equipment can be shifted, thereby adjusting the feeding speed. The faster the conveying speed, the longer the finished stubble, and vice versa. This allows for flexible adjustment of the length of the chopped stubble, improving the chopping quality of the straw cutter. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the drive component of this utility model;
[0018] Figure 3 This is a schematic cross-sectional view of the grass-cutting mechanism of this utility model;
[0019] Figure 4 This is a schematic diagram of the shifting assembly of this utility model;
[0020] Figure 5 This is a cross-sectional structural diagram of the gear shift box of this utility model.
[0021] In the diagram: 1. Base, 2. Feeding rack, 3. Discharging rack, 4. Chopping mechanism, 41. Chopping cutter holder, 42. Transmission roller, 43. Chain plate, 44. Feeding roller, 45. Drive assembly, 451. Connecting shaft, 452. Sprocket, 453. Transmission gear, 454. Motor, 455. Double groove pulley, 456. Belt pulley one, 457. Belt pulley two, 46. Gear shifting assembly, 461. Gear one, 462. Gear two, 463. Slider, 464. Gear three, 465. Gear four, 466. Gear shifting lever, 467. Spring, 468. Clearance opening, 469. Limiting groove, 5. Gear shifting box, 6. Gear shifting box cover, 7. Strip opening, 8. Screw, 9. Fixing bolt, 10. Feeding top cover, 11. Baffle, 12. Microcontroller. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figure 1-5 This embodiment provides a technical solution: a chaff cutter, including a base 1 and a chaff cutter mechanism 4;
[0024] Base 1: It has a feeding rack 2 on the rear side of its upper end and a discharging rack 3 on its front side. The front side of the discharging rack 3 is provided with a discharge port. The two discharge ports are distributed in an up-down state. It also includes a feeding top cover 10 and a baffle 11. The feeding top cover 10 is set on the front side of the upper end of the feeding rack 2. The rear of the feeding top cover 10 is higher than the front, which facilitates feeding. The baffles 11 are rotatably connected to the front side of the discharging rack 3. The upper baffle 11 is longitudinally adjacent to the upper discharge port, and the lower baffle 11 is longitudinally adjacent to the lower discharge port, which provides a basis for the stable feeding and discharging of the chaff cutter.
[0025] The chaff-cutting mechanism 4 includes a chaff cutter holder 41, transmission rollers 42, chain plates 43, feeding rollers 44, a drive assembly 45, and a shifting assembly 46. The chaff cutter holder 41 is rotatably connected to the inside of the discharge rack 3. Each chaff cutter holder 41 consists of a steel frame and multiple chaff blades. The chaff blades are fixed in a circular array on the outer surface of the steel frame with the axis of the steel frame as the center. The transmission rollers 42 are respectively located on the front and rear sides of the lower part of the inside of the feeding rack 2. Two transmission rollers 42 are connected by a chain plate 43. The front transmission roller 42 is rotatably connected to the lower front side of the inside of the feeding rack 2. The outer surface of the transmission roller 42 has evenly distributed protrusions that mesh with the gaps in the inner wall of the chain plate 43 to ensure transmission stability. The feeding roller 44 is rotatably connected to the inner wall of the chain plate 43. Inside the feed rack 2, at the upper front side, the feeding roller 44 is fitted with the upper front side of the chain plate 43. The outer surface of the feeding roller 44 has evenly distributed inserts for inserting into the forage, providing a foundation for stable forage conveying and stable feeding of the chaff cutter. The drive assembly 45 is located on the right side of the feed rack 2. The drive assembly 45 includes a connecting shaft 451, a sprocket 452, and a transmission gear 453. The connecting shaft 451 is rotatably connected to the upper front side inside the feed rack 2. Both the connecting shaft 451 and the right end of the transmission roller 42 are equipped with sprockets 452, which are connected by a chain drive. The right side of the outer surface of both the transmission roller 42 and the feeding roller 44 is fixedly fitted with transmission gears 453, which mesh to cut the forage. The machine's feeding operation provides a stable transmission effect. The drive assembly 45 also includes a motor 454, a double-groove pulley 455, a first pulley 456, and a second pulley 457. The motor 454 is located in the middle of the base 1, and its input end is electrically connected to the output end of the microcontroller 12. The double-groove pulley 455 is located on the right side of the upper guillotine holder 41. The double-groove pulley 455 is composed of two coaxial pulley bodies stacked and fixed. The first pulley 456 is located on the right side of the lower guillotine holder 41. The left groove of the double-groove pulley 455 is connected to the first pulley 456 via a first belt. The second pulley 457 is located at the right end of the output shaft of the motor 454. The right groove of the double-groove pulley 455 is connected to the second pulley 457 via a first belt. The chaff cutter is connected by a second belt drive. The diameters of both pulley 456 and pulley 457 are smaller than the diameter of the double-groove pulley 455, which creates a stable transmission effect and provides a stable drive for the chaff cutter's cutting operation. The shifting assembly 46 is located on the left side of the feed frame 2. The shifting assembly 46 includes gear 461, gear 462, slider 463, gear 464, and gear 465. Gear 461 is fixedly sleeved on the left side of the outer surface of the upper chaff cutter holder 41. Gear 462 is located on the left side of the upper chaff cutter holder 41. A shifting box 5 is located on the left side of the feed frame 2. Slider 463 is slidably connected to the left side of the inside of the shifting box 5. Slider 463 is generally square. Gear 464 is rotatably connected to the middle of the inside of slider 463.Connecting shaft 451 is slidably connected to the inner wall of gear three 464 via a hexagonal head on the left side. Gear four 465 is fixedly sleeved on the middle of the outer surface of gear three 464. Gear one 461 is fitted with gear three 464, and gear two 462 is fitted with gear four 465. In the initial state, gear one 461 and gear three 464, and gear two 462 and gear four 465 are all in a separated state. When slider 463 moves to the left, gear one 461 and gear three 464 engage. When slider 463 moves to the right, gear two 462 and gear four 465 engage. This is for chopping grass. The shift assembly 46 provides the foundation for the shifting operation of the machine. It also includes a shift lever 466, a spring 467, a clearance opening 468, and a limiting groove 469. The shift lever 466 is rotatably connected to the front right end of the slider 463. A spring 467 is provided between the left side wall of the slider 463 and the inner wall of the shift box 5. The spring 467 is sleeved on the outer surface of the slider 463. A shift box cover 6 is provided at the upper end of the shift box 5. The clearance opening 468 is located in the middle of the upper end of the shift box cover 6. The limiting grooves 469 are all located in front of the clearance opening 468 and are all inclined to the left. The inner walls of the opening 468 and the limiting groove 469 are fitted to the middle of the outer surface of the shift lever 466 to provide a limiting effect for the shifting operation of the chaff cutter. It also includes a strip-shaped opening 7 and screws 8. The strip-shaped openings 7 are respectively opened at the rear ends of the left and right sides of the feeding frame 2. The screws 8 are slidably connected to the rear ends of the left and right sides of the feeding frame 2 via angle irons. Right-hand fixing bolts 9 are provided on both the front and rear sides of the angle irons. The inner walls of the fixing bolts 9 are threaded to the outer surface of the vertically adjacent screws 8. The left and right sides of the transmission roller 42 located at the rear penetrate the inner walls of the strip-shaped openings 7 and are connected to the vertically adjacent screws 8. The internal front rotating connection allows for quick adjustment of the chain plate 43's tension. When the chain plate 43 becomes loose, the position of the rear transmission roller 42 can be changed by tightening or loosening the fixing bolt 9 and the moving screw 8. This enables rapid adjustment of the chain plate 43's tension, allowing for fast and automatic feeding via the chain plate 43 and the feeding roller 44, avoiding manual intervention. Furthermore, the conveying speed of the raw material can be changed by shifting gears; a faster conveying speed results in a longer finished stubble, and vice versa, thus flexibly changing the length of the chopped stubble and improving the chopping quality of the straw cutter.
[0026] The working principle of the chaff cutter provided by this utility model is as follows: When using the chaff cutter for chaff cutting, first shift gears according to the actual situation. In the initial state, the shift lever 466 is located inside the middle limiting groove 469. At this time, gear one 461 and gear three 464 are in a disengaged state, and gear two 462 and gear four 465 are also in a disengaged state. The chaff cutter is in an idling state at this time. Turn the shift lever 466 backward until the shift lever 466 is completely away from the middle limiting groove 469. Then pull the shift lever 466 to the right, causing the slider 463 and gear three 464 to move to the right. The spring 467 is under force close to the compression limit, and gear four 465 also moves to the right until gear two 462 and gear four 465 are in a meshing state. The connecting shaft 4 The hexagonal head on the left side of 51 slides against the inner wall of gear 3 464, providing stable transmission between gear 3 464 and connecting shaft 451 as they move left and right. At this time, the shift lever 466 is longitudinally adjacent to the rightmost limiting groove 469. Deflecting the shift lever 466 forward causes it to enter the rightmost limiting groove 469, which then limits its movement. Due to the elastic deformation of spring 467, after the shift lever 466 enters the rightmost limiting groove 469, spring 467 exerts a leftward force on the shift lever 466. Combined with the limiting effect of the inclined limiting groove 469, the shift lever 466 remains positioned at the front of the rightmost limiting groove 469. At this point, gear 2 462 and gear... When gear 465 meshes, the number of teeth on gear 2 (462) is much smaller than that on gear 465. Gear 2 (462) needs to rotate many times for gear 465 to rotate once, creating a deceleration effect and slowing down the feeding speed. Following the shifting steps described above, after moving shift lever 466 to the leftmost limit slot 469, gear 3 (464) also moves to the left and meshes with gear 1 (461). At this point, gear 1 (461) meshes with gear 3 (464), and since the number of teeth on gear 3 (464) is much smaller than that on gear 1 (461), gear 3 (464) will rotate many times for gear 1 (461) to rotate once, creating an acceleration effect and speeding up the feeding speed. Taking the slowing feeding speed as an example, when gear 2 (462) meshes with gear 4 (465), the microcontroller 12 controls motor 454. When the motor 454 is in operation, the output shaft drives pulley 457 to rotate forward. Through the transmission of pulley 455, the double-grooved pulley 455 also rotates in reverse, driving the upper guillotine holder 41 to rotate. Simultaneously, as the double-grooved pulley 455 rotates, through the transmission of pulley 456 and the lower guillotine holder 41, pulley 456 and the lower guillotine holder 41 also rotate. At the same time, as the upper guillotine holder 41 rotates, gear 462 also rotates. Through the meshing of gear 462 and gear 465, the connecting shaft 451 also rotates, driving the upper sprocket 452 to rotate. Through the transmission of the chain, the lower sprocket 452 also rotates, driving the front drive roller 42 and the lower drive gear 453 to rotate. The front drive roller 42 rotates in reverse, driven by the chain plate 43.The rear drive roller 42 also reverses direction, and the chain plate 43 continuously rotates forward on the outer surface of the two drive rollers 42. Because the two drive gears 453 are meshed, the upper drive gear 453 also rotates forward, driving the feeding roller 44 to rotate forward. At this time, the two guillotine holders 41 rotate at high speed, and the external conveyor belt transports the raw material to the surface of the chain plate 43. The chain plate 43 carries the raw material forward. Through the reverse rotation of the chain plate 43 and the forward rotation of the feeding roller 44, a forward clamping and conveying effect is formed on the raw material, making... The raw material can be stably conveyed forward. As the raw material is conveyed forward, the high-speed rotating guillotine holder 41 above first cuts the raw material. Since the feeding is slow at this time, the rotation speed of the guillotine holder 41 is fixed at the same time. The forward movement distance of the raw material is short, and the length of the cut raw material is short, forming a short stub. After being cut by the guillotine holder 41 above, the short stub will be thrown out from the discharge port above due to inertia. When it is necessary to cut the raw material into small pieces, the upper baffle 11 is pushed down, so that the upper baffle 11... When the material is in a closed state and in contact with the surface of the discharge rack 3, the short stubble is blocked by the upper baffle 11 and then passes along the inner wall of the discharge rack 3 through the lower high-speed rotating guillotine frame 41. The lower guillotine frame 41 again chops the short stubble into fragments. When it is necessary to chop long stubble, the shift lever 466 is moved to the leftmost limit groove 469, gear one 461 meshes with gear three 464, and the feeding speed increases. At the same time, the rotation speed of the guillotine frame 41 is fixed, and the raw material... The longer the forward movement distance, the longer the length of the cut material, forming a long stubble. After being cut by the upper guillotine holder 41, the long stubble will be thrown out from the upper discharge port due to inertia, realizing flexible replacement of long and short stubble and debris. After the equipment has been working for a period of time, it is necessary to check the tension of the chain plate 43 to prevent the chain plate 43 from falling off. When the chain plate 43 is loose, the position of the rear transmission roller 42 can be changed by tightening or loosening the fixing bolt 9 and the moving screw 8, thereby realizing the rapid adjustment of the tension of the chain plate 43.
[0027] It is worth noting that the microcontroller 12 disclosed in the above embodiments is an STM32F405RGT6 microcontroller, and the motor 454 is a Y2-280S-8 motor. The microcontroller 12 controls the operation of the motor 454 using methods commonly used in the prior art.
[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A chaff cutter, characterized in that: Includes a base (1) and a straw-cutting mechanism (4); Base (1): It has a feeding rack (2) on the rear side of its upper end and a discharging rack (3) on its front side; The grass-cutting mechanism (4) includes a cutter holder (41), a transmission roller (42), a chain plate (43), a feeding roller (44), a drive assembly (45), and a shifting assembly (46). The cutter holder (41) is rotatably connected to the inside of the discharge rack (3). The transmission rollers (42) are respectively set on the front and rear sides of the lower part of the inside of the feed rack (2). The two transmission rollers (42) are connected by the chain plate (43). The feeding roller (44) is rotatably connected to the front side of the upper end of the inside of the feed rack (2). The feeding roller (44) is fitted with the front side of the upper end of the chain plate (43). The drive assembly (45) is set on the right side of the feed rack (2), and the shifting assembly (46) is set on the left side of the feed rack (2).
2. The chaff cutter according to claim 1, characterized in that: It also includes a microcontroller (12), which is placed on the right side of the base (1), and the input terminal of the microcontroller (12) is electrically connected to an external power supply.
3. The chaff cutter according to claim 1, characterized in that: The drive assembly (45) includes a connecting shaft (451), a sprocket (452), and a transmission gear (453). The connecting shaft (451) is rotatably connected to the upper front end inside the feed rack (2). The right ends of the connecting shaft (451) and the transmission roller (42) are both provided with sprockets (452). The two sprockets (452) are connected by a chain drive. The right side of the outer surface of the transmission roller (42) and the feeding roller (44) are both fixedly fitted with transmission gears (453), and the two transmission gears (453) are meshed together.
4. The chaff cutter according to claim 2, characterized in that: The drive assembly (45) also includes a motor (454), a double-groove pulley (455), a first pulley (456), and a second pulley (457). The motor (454) is located in the middle of the base (1). The input end of the motor (454) is electrically connected to the output end of the microcontroller (12). The double-groove pulley (455) is located on the right side of the upper guillotine holder (41). The first pulley (456) is located on the right side of the lower guillotine holder (41). The left groove of the double-groove pulley (455) is connected to the first pulley (456) via a first belt. The second pulley (457) is located at the right end of the output shaft of the motor (454). The right groove of the double-groove pulley (455) is connected to the second pulley (457) via a second belt.
5. The chaff cutter according to claim 1, characterized in that: The shifting assembly (46) includes gear one (461), gear two (462), slider (463), gear three (464), and gear four (465). Gear one (461) is fixedly sleeved on the left side of the outer surface of the upper guillotine holder (41). Gear two (462) is located on the left side of the upper guillotine holder (41). A shifting box (5) is provided on the left side of the feed rack (2). Slider (463) is slidably connected to the left side of the inside of the shifting box (5). Gear three (464) is rotatably connected to the middle of the inside of slider (463). The connecting shaft (451) is slidably connected to the inner wall of gear three (464) through the hexagonal head on the left side. Gear four (465) is fixedly sleeved on the middle of the outer surface of gear three (464). Gear one (461) and gear three (464) are installed together. Gear two (462) and gear four (465) are installed together.
6. The chaff cutter according to claim 5, characterized in that: The shift assembly (46) also includes a shift lever (466), a spring (467), a clearance opening (468), and a limiting groove (469). The shift lever (466) is rotatably connected to the front right end of the slider (463). A spring (467) is provided between the left side wall of the slider (463) and the inner wall of the shift box (5). The spring (467) is sleeved on the outer surface of the slider (463). A shift box cover (6) is provided at the upper end of the shift box (5). The clearance opening (468) is opened at the middle of the upper end of the shift box cover (6). The limiting grooves (469) are all opened at the front side of the clearance opening (468). The limiting grooves (469) are all inclined to the left. The inner walls of the clearance opening (468) and the limiting grooves (469) are fitted and installed with the middle of the outer surface of the shift lever (466).
7. The chaff cutter according to claim 1, characterized in that: It also includes a strip-shaped opening (7) and a screw (8). The strip-shaped opening (7) is respectively opened at the left and right rear ends of the feed rack (2). The screw (8) is slidably connected to the left and right rear ends of the feed rack (2) through angle iron. Right fixing bolts (9) are provided on the front and rear sides of the angle iron. The inner wall of the fixing bolt (9) is threaded to the outer surface of the vertically adjacent screw (8). The left and right sides of the transmission roller (42) located at the rear are rotatably connected to the inner front side of the vertically adjacent screw (8) through the inner wall of the strip-shaped opening (7).
8. The chaff cutter according to claim 1, characterized in that: It also includes a feed top cover (10) and a baffle (11). The feed top cover (10) is located on the upper front side of the feed rack (2), and the baffle (11) is rotatably connected to the front side of the discharge rack (3).