A cutting assembly for an agricultural cutter and method of use

Abstract

The application discloses a cutting assembly for an agricultural cutting machine and a use method, relates to the agricultural cutting technical field, and comprises a control handle, further comprises a cutting assembly in rotation connection with the control handle; the cutting assembly contains a cutting frame, the cutting frame is in rotation connection between the control handle, the cutting frame is provided with a cutting wheel assembly; the cutting wheel assembly comprises an upper fixed disc and a lower fixed disc, the upper fixed disc is fixedly connected between the lower fixed disc, the upper fixed disc is fixedly provided with a fixed cover, and the cutting frame is fixedly provided with a cutting motor. Advantages are that: the centrifugal force generated during rotation cutting drives the cutting blade to move, the cutting blade is elastically stretched within a certain range, is automatically bent and folded when touching a hard object, the probability of cutting blade breakage is reduced, in addition, the cutting blade can be locked according to requirements, is used for cutting in a hard object-free place, and cutting efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural cutting technology, and in particular to a cutting assembly for an agricultural cutting machine and its method of use. Background Technology

[0002] As a type of agricultural cutting machine, lawnmowers are commonly used in home gardens, parks, sports fields, roadside green belts, and other places. Their main function is to cut the grass on the lawn to a certain height through rotating blades or other cutting devices, thereby maintaining the neatness and beauty of the lawn.

[0003] Existing blade lawnmowers use either disc-type or protruding cutting blades. When not in use, the blades are usually protected by a protective cover. During the cutting process, if the blade encounters a hard object, the blade will deform upon impact. Therefore, CN214385124U discloses a retractable lawnmower blade, which includes a connecting part. Both ends of the connecting part are provided with cutting parts, which are symmetrically centered. The connecting part has a insertion hole along its length, and the cutting parts are slidably connected in the insertion hole. The cutting parts have a first fixing hole, and the connecting part has several second fixing holes that mate with the first fixing hole.

[0004] The aforementioned retractable lawnmower blade features reinforcing ribs that enhance the structural strength between the first horizontal section and the curved section, as well as between the second horizontal section and the curved section. This reduces the likelihood of the blade breaking when cutting hard objects during high-speed rotation, improving the overall safety and stability of the cutting section. Furthermore, the movable cutting section relative to the connecting section allows for adjustment of the blade's overall length to accommodate different sizes of guards, enhancing the blade's versatility. The cooperation of the limiting block and the limiting groove fixes the cutting section's movement range within the insertion hole, preventing the cutting section from detaching from the connecting section.

[0005] However, in actual use, the aforementioned retractable lawnmower blades are fixedly connected to the blade holder. When the blade holder rotates, it will cause the blade to rotate rapidly. Although reinforcing ribs are used to strengthen the blade, when it collides with hard objects, it will cause the blade edge to break and the stroke to be blunt, affecting the cutting efficiency. In addition, there are multiple blades on the blade holder, and each blade needs to be adjusted separately when adjusting the length of the blade, which is cumbersome and has low adjustment efficiency.

[0006] Therefore, a new type of cutting assembly and usage method for agricultural cutting machines can be adopted to overcome the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art by proposing a cutting assembly for agricultural cutting machines and a method of using it.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A cutting assembly for an agricultural cutter includes a control handle and a cutting assembly rotatably connected to the control handle;

[0010] The cutting assembly includes a cutting frame rotatably connected to a control handle, and a cutting wheel assembly is mounted on the cutting frame;

[0011] The cutting wheel assembly includes an upper fixed plate and a lower fixed plate, which are fixedly connected. A fixed cover is fixedly installed on the upper fixed plate, and a cutting motor is fixedly installed on the cutting frame. A torque increasing mechanism is installed between the fixed cover and the cutting motor to increase the torque of the cutting wheel assembly.

[0012] Multiple first connecting blocks are slidably installed between the upper fixed plate and the lower fixed plate. The lower fixed plate is rotatably connected to the cutting frame. Multiple limiting components that cooperate with the corresponding first connecting blocks are installed on the upper fixed plate. A reset mechanism is installed between each first connecting block and the upper and lower fixed plates. A cutting blade is installed on each first connecting block through a blade mounting mechanism.

[0013] Preferably, the cutting frame is equipped with a protective cover that cooperates with the cutting wheel assembly, and the protective cover and the cutting frame are connected by a damped rotational connection.

[0014] Preferably, the torque-increasing mechanism includes a variable-speed helical gear fixedly mounted on a fixed cover, and a helical gear meshing with the variable-speed helical gear is fixedly mounted on the drive end of the cutting motor, wherein the diameter of the helical gear is smaller than the diameter of the variable-speed helical gear.

[0015] Preferably, the limiting component includes a threaded cylinder fixedly mounted on an upper fixed plate, a threaded sleeve rotatably mounted on the threaded cylinder, a movable ring rotatably mounted on the threaded sleeve, and the movable ring and the threaded cylinder being slidably connected.

[0016] A connecting hinge is fixedly installed on the movable ring, a push-pull rod is rotatably installed on the connecting hinge, a movable plate is rotatably installed at the end of the push-pull rod away from the push-pull rod, the movable plate is slidably connected to the upper fixed plate, and a toothed column is installed on the upper fixed plate through a sliding mechanism;

[0017] A damping sleeve is fixedly installed on the toothed column, and a damping slide rod that cooperates with the first connecting block is slidably installed on the damping sleeve. A stroke amplification mechanism is installed between the toothed column and the moving plate.

[0018] Preferably, the sliding mechanism includes fixed blocks fixedly installed on both sides of the tooth column, and multiple limiting slide columns are rotatably installed on each of the two fixed blocks. The upper fixed plate has two grooves that cooperate with the corresponding limiting slide columns.

[0019] Preferably, the stroke amplification mechanism includes a gear rotatably mounted on a movable plate, a toothed plate meshing with the gear is fixedly mounted on the upper fixed plate, and a plurality of tooth grooves meshing with the gear are provided on the toothed column.

[0020] Preferably, the reset mechanism includes a fixed plate fixedly installed between the upper fixed plate and the lower fixed plate, a plurality of limiting telescopic rods fixedly installed between the first connecting block and the fixed plate, and a plurality of reset springs fixedly installed between the first connecting block and the fixed plate, each of the reset springs being sleeved on the outside of the corresponding limiting telescopic rod.

[0021] Preferably, the blade mounting mechanism includes a rotating shaft fixedly mounted on a first connecting block, a second connecting block rotatably mounted on the rotating shaft, two spring coils fixedly mounted between the second connecting block and the rotating shaft, and the second connecting block and the cutting blade being fixedly connected by bolts.

[0022] Preferably, the rotating shaft has a slot that mates with the damping slide rod, and the slot has two insertion holes. Two insertion rods that mate with the corresponding insertion holes are fixedly installed on one end of the damping slide rod near the rotating shaft.

[0023] The present invention also provides a method of using a cutting assembly for an agricultural cutter, comprising the above-mentioned cutting assembly for an agricultural cutter, and further comprising the following steps:

[0024] S1. A controller that works with the cutting motor is installed on the control handle to control the operation of the cutting motor and adjust the output power of the cutting motor according to the cutting scenario.

[0025] S2. Before cutting, the angle between the cutting assembly and the control handle needs to be adjusted according to the operator's height so that the angle between the cutting assembly and the control handle reaches the most comfortable operating angle for the operator, and the cutting assembly is kept parallel to the cutting surface.

[0026] S3. After the angle adjustment is completed, the cutting motor is started by the controller. The cutting motor drives the upper fixed plate to rotate through the torque increasing mechanism. The centrifugal force generated by the rotation will cause the first connecting block to slide between the upper and lower fixed plates, so that the blade mounting mechanism on the first connecting block extends out of the upper fixed plate. The cutting blade will also unfold out of the blade mounting mechanism under the action of centrifugal force. At this time, the cutting blade and the center point of the upper fixed plate above the first connecting block are on the same straight line.

[0027] S4. When encountering a hard object during the cutting process, the cutting blade collides with the hard object. First, under the pressure, the cutting blade will rotate around the blade mounting mechanism, causing the cutting blade to tilt. This reduces the impact force between the cutting blade and the hard object, thus protecting the cutting blade. At the same time, when the cutting blade is tilted, the impact force on the cutting blade is divided into two directions. One component of the force will cause the cutting blade to continue rotating, while the other component will cause the first connecting block to retract into the upper and lower fixed plates, further protecting the cutting blade. Once the cutting blade is separated from the hard object, the reset mechanism will restore the cutting blade to its original position for cutting operations.

[0028] S5. The length of the cutting blade extending from the upper fixed plate is adjusted by a limiting component to adjust the cutting diameter of the cutting blade. At the same time, the limiting component locks the cutting blade to fix it. It is suitable for high-level cutting without hard objects obstructing it. The fixed cutting blade has higher cutting efficiency compared to the telescopic cutting blade.

[0029] Compared with existing technologies, the advantages of this invention are:

[0030] 1. When cutting, the cutting assembly of this agricultural cutter can adjust the position of multiple cutting blades simultaneously by setting a limit component. The adjustment efficiency is high, and the adjustment displacement of each cutting blade is equal, ensuring that the end of each cutting blade is on the same circumference, effectively guaranteeing the cutting efficiency.

[0031] 2. When cutting, the cutting assembly of this agricultural cutter uses a reset mechanism to allow the cutting blade to retract freely, and a spring coil to automatically fold and store the cutting blade. The centrifugal force generated during cutting pulls the cutting blade out from between the upper and lower fixed plates. When encountering hard objects, it can automatically rotate and retract, effectively reducing the probability of the cutting blade breaking and effectively protecting the cutting blade.

[0032] 3. When cutting, the cutting assembly of this agricultural cutter uses a movable damping slide rod and a damping sleeve to limit the movement of the moving plate on the cutting blade, thereby controlling the maximum range of movement of the cutting blade and changing the cutting radius of the cutting blade. In conjunction with the slot on the rotating shaft, the damping slide rod can be inserted into the slot to lock the cutting blade. This is suitable for cutting without hard objects obstructing the view, improving the stability of the cutting blade and thus improving cutting efficiency.

[0033] 4. When cutting, the cutting assembly of this agricultural cutter can increase the displacement of the moving plate in the limiting component by setting a stroke expansion structure. This allows the threaded sleeve to move a smaller distance to achieve long-distance adjustment of the damping slide rod, reducing the overall thickness of the cutting wheel assembly, thereby reducing the volume of the cutting wheel assembly, reducing wind resistance, improving the energy utilization rate of the cutting motor, and thus improving cutting efficiency.

[0034] In summary, this invention utilizes the centrifugal force generated during rotary cutting to drive the cutting blade to move, allowing the cutting blade to elastically extend and retract within a certain range. When it comes into contact with hard objects, it automatically bends and folds, reducing the probability of the cutting blade breaking. In addition, the cutting blade can be locked as needed for cutting in places without hard objects, thereby improving cutting efficiency. Attached Figure Description

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of a cutting assembly for an agricultural cutting machine proposed in this invention;

[0037] Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle;

[0038] Figure 3 for Figure 1 Enlarged schematic diagram of the cutting component after it has been rotated at a certain angle;

[0039] Figure 4 for Figure 3 Detailed schematic diagram of the structure with the protective shield closed;

[0040] Figure 5 for Figure 4 Detailed schematic diagram of the structure after rotation at a certain angle;

[0041] Figure 6 for Figure 3 Enlarged structural schematic diagram of the middle cutting wheel assembly;

[0042] Figure 7 for Figure 6 Detailed schematic diagram of the structure after rotation at a certain angle;

[0043] Figure 8 for Figure 6 Detailed schematic diagram of the structure after removing the helical gear and the fixed cover;

[0044] Figure 9 for Figure 8 Detailed schematic diagram of the upper and lower fixed plates and the threaded cylinder along one of the angles;

[0045] Figure 10 for Figure 9 Detailed schematic diagram of the three-dimensional structure;

[0046] Figure 11 for Figure 8 Detailed schematic diagram of the planar structure along one of the angles after removing the upper fixing plate;

[0047] Figure 12 for Figure 11 Detailed schematic diagram of the three-dimensional structure;

[0048] Figure 13 for Figure 12 Detailed schematic diagram of the structure after removing the lower fixing plate;

[0049] Figure 14 for Figure 13 Enlarged schematic diagram of the threaded sleeve, the moving ring, and one set of cutting blades;

[0050] Figure 15 for Figure 14 Detailed schematic diagram of the planar structure along one of the angles;

[0051] Figure 16 for Figure 15 Detailed enlarged structural diagram of section A;

[0052] Figure 17 for Figure 15 Detailed schematic diagram of the three-dimensional structure of part A and the tooth column;

[0053] Figure 18 for Figure 14 Enlarged schematic diagram of the reset mechanism, blade mounting mechanism, and cutting blade;

[0054] Figure 19 for Figure 18 Detailed exploded view of the blade mounting mechanism.

[0055] In the diagram: 1 Control handle, 2 Cutting motor, 3 Protective cover, 4 Cutting wheel assembly, 5 Cutting frame, 6 Upper fixed plate, 7 Variable speed helical gear, 8 Fixed cover, 9 Cutting blade, 10 Lower fixed plate, 11 Threaded cylinder, 12 Sealing rubber strip, 13 Threaded sleeve, 14 Moving ring, 15 Limiting assembly, 16 Reset mechanism, 17 Connecting hinge, 18 Blade mounting mechanism, 19 Tooth column, 20 Fixed block, 21 Tooth plate, 22 Gear, 23 Moving plate, 24 Push-pull rod, 25 Damping sleeve, 26 Damping rod, 27 Limiting slide column, 28 Fixed plate, 29 Reset spring, 30 Limiting telescopic rod, 31 First connecting block, 32 Second connecting block, 33 Rotating shaft, 34 Slot, 35 Spring coil. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] Example 1: Refer to Figures 1-7 A cutting assembly for an agricultural cutter includes a control handle 1 and a cutting assembly rotatably connected to the control handle 1; a controller is mounted on the control handle 1 for controlling the operation of the cutting assembly.

[0058] The cutting assembly includes a cutting frame 5, which is rotatably connected to a control handle 1. A cutting wheel assembly 4 is mounted on the cutting frame 5. A protective cover 3 that cooperates with the cutting wheel assembly 4 is mounted on the cutting frame 5. The protective cover 3 and the cutting frame 5 are connected by a damped rotation.

[0059] An angle adjustment motor that cooperates with the cutting frame 5 is installed on the control handle 1 to adjust the angle of the cutting frame 5.

[0060] The protective cover 3 is used to protect the cutting wheel assembly 4 and reduce the probability of damage to the cutting wheel assembly 4. It is also used to protect the surrounding operators and prevent the cutting wheel assembly 4 from being exposed and causing unnecessary cuts. The purpose of using a damped rotating connection is to allow the protective cover 3 to stop at any position.

[0061] The cutting wheel assembly 4 includes an upper fixed plate 6 and a lower fixed plate 10, which are fixedly connected. A fixed cover 8 is fixedly installed on the upper fixed plate 6, and a cutting motor 2 is fixedly installed on the cutting frame 5. A torque increasing mechanism is installed between the fixed cover 8 and the cutting motor 2 to increase the torque of the cutting wheel assembly 4.

[0062] The rotation of the cutting motor 2 drives the fixed cover 8 to rotate through the torque increasing mechanism, which in turn drives the upper fixed plate 6 and the lower fixed plate 10 to rotate. The rotation of the upper fixed plate 6 and the lower fixed plate 10 drives the cutting wheel assembly 4 to rotate, thus performing the cutting operation.

[0063] The torque-increasing mechanism includes a variable-speed helical gear 7 fixedly mounted on the fixed cover 8, and a helical gear meshing with the variable-speed helical gear 7 fixedly mounted on the drive end of the cutting motor 2. The diameter of the helical gear is smaller than the diameter of the variable-speed helical gear 7.

[0064] The rotation of the helical gear on the drive end of the cutting motor 2 drives the large-diameter variable speed helical gear 7 that meshes with it to rotate. Since the diameter of the variable speed helical gear 7 is larger than the diameter of the helical gear, the torque generated by the cutting motor 2 is amplified, so that the cutting wheel assembly 4 has a greater cutting torque and can cut crops with higher hardness.

[0065] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 3-5 , Figures 8-19 Multiple first connecting blocks 31 are slidably installed between the upper fixed plate 6 and the lower fixed plate 10. The lower fixed plate 10 is rotatably connected to the cutting frame 5. Multiple limiting components 15 that cooperate with the corresponding first connecting blocks 31 are installed on the upper fixed plate 6.

[0066] The limiting assembly 15 includes a threaded cylinder 11 fixedly mounted on the upper fixed plate 6, a threaded sleeve 13 rotatably mounted on the threaded cylinder 11, a movable ring 14 rotatably mounted on the threaded sleeve 13, and a sliding connection between the movable ring 14 and the threaded cylinder 11.

[0067] The fixed cover 8 and the lower fixed plate 10 are fixedly connected by bolts. The bolts pass through the threaded cylinder 11. A through groove is opened in the middle of the upper fixed plate 6 and the lower fixed plate 10 for the bolts to pass through.

[0068] A connecting hinge 17 is fixedly installed on the movable ring 14. A push-pull rod 24 is rotatably installed on the connecting hinge 17. A movable plate 23 is rotatably installed at the end of the push-pull rod 24 away from the push-pull rod 24. The movable plate 23 is slidably connected to the upper fixed plate 6. A toothed column 19 is installed on the upper fixed plate 6 through a sliding mechanism.

[0069] The sliding mechanism includes fixed blocks 20 fixedly installed on both sides of the toothed column 19. Multiple limiting slide columns 27 are rotatably installed on both fixed blocks 20. Two grooves that cooperate with the corresponding limiting slide columns 27 are opened on the upper fixed plate 6.

[0070] The sliding mechanism is used to limit the movement of the toothed column 19, ensuring its stable movement. The purpose of the rotating connection between the limiting slide column 27 and the fixed block 20 is to convert the sliding friction during movement into rolling friction, effectively reducing friction and making the toothed column 19 move more smoothly, which can also extend its service life.

[0071] A damping sleeve 25 is fixedly installed on the toothed column 19, and a damping slide rod 26 that cooperates with the first connecting block 31 is slidably installed on the damping sleeve 25. A stroke amplification mechanism is installed between the toothed column 19 and the moving plate 23.

[0072] Both the damping sleeve 25 and the damping rod 26 are existing structures, which mainly increase friction to increase movement resistance. Under the action of the damping rod 26's own weight, the damping rod 26 cannot move freely on the damping sleeve 25. Therefore, external force intervention is required to stop the damping rod 26 at any position, so that the adjustment of the damping rod 26 is more stable.

[0073] Rotating the threaded sleeve 13 causes the threaded sleeve 13 to move on the threaded cylinder 11 under the action of the threaded cylinder 11. The movement of the threaded sleeve 13 drives the moving ring 14 to move, which in turn drives the connecting hinge 17 to move. The movement of the connecting hinge 17 will cause the end of the push-pull rod 24 connected to the connecting hinge 17 to move in the vertical direction. The end of the push-pull rod 24 away from the connecting hinge 17 is restricted by the moving plate 23, so the push-pull rod 24 will not move horizontally, but will move at an angle. Both ends of the push-pull rod 24 move in the horizontal and vertical directions, only the tilt angle of the push-pull rod 24 changes.

[0074] The change in the tilt angle of the push-pull rod 24 means that the horizontal position of the end of the push-pull rod 24 away from the connecting hinge 17 will change. The push-pull rod 24 will drive the toothed column 19 to move through the stroke amplification mechanism, thereby driving the damping sleeve 25 and the damping slide rod 26 to move. The height of the damping slide rod 26 is adjustable and can limit the first connecting block 31.

[0075] When the first connecting block 31 slides between the upper fixed plate 6 and the lower fixed plate 10 under the action of centrifugal force, it will stop moving when limited by the damping slide rod 26. At this time, the first connecting block 31 reaches the maximum displacement after the limit is reached, which is used to adjust the cutting radius of the cutting blade 9.

[0076] The rotating shaft 33 has a slot 34 that mates with the damping slide 26. The slot 34 has two insertion holes. Two insertion rods that mate with the corresponding insertion holes are fixedly installed on one end of the damping slide 26 near the rotating shaft 33.

[0077] If it is necessary to lock the cutting blade 9, simply insert the insert rod on the damping slide 26 into the socket on the rotating shaft 33. The action of the insert rod and the socket will lock the cutting blade 9, preventing it from retracting or rotating.

[0078] The stroke amplification mechanism includes a gear 22 rotatably mounted on a movable plate 23, a toothed plate 21 that meshes with the gear 22 fixedly mounted on an upper fixed plate 6, and a plurality of tooth grooves that mesh with the gear 22 on a toothed column 19.

[0079] The movement of the movable plate 23 will drive the gear 22 to move. Under the action of the gear plate 21, the gear 22 will also be driven to rotate. At this time, the rotation of the gear 22 will drive the gear column 19 to move. Since the gear 22 is still moving, the displacement of the gear column 19 is greater than the displacement of the movable plate 23, thus achieving stroke amplification.

[0080] By setting up a stroke expansion structure, the displacement of the moving plate 23 can be expanded, so that the threaded sleeve 13 can move a smaller distance to achieve long-distance adjustment of the damping slide bar 26, reduce the overall thickness of the cutting wheel assembly 4, reduce the volume of the cutting wheel assembly 4, reduce wind resistance, improve the energy utilization rate of the cutting motor 2, and thus improve cutting efficiency.

[0081] Each first connecting block 31 is equipped with a reset mechanism 16 between the upper fixed plate 6 and the lower fixed plate 10. The reset mechanism 16 includes a fixed plate 28 fixedly installed between the upper fixed plate 6 and the lower fixed plate 10. Multiple limiting telescopic rods 30 are fixedly installed between the first connecting block 31 and the fixed plate 28, and multiple reset springs 29 are fixedly installed between the first connecting block 31 and the fixed plate 28. Each reset spring 29 is sleeved on the outside of the corresponding limiting telescopic rod 30.

[0082] Under the action of centrifugal force, the return spring 29 will be stretched. When there is no limit of the damping slide bar 26, the faster the speed of the cutting motor 2 drive end, the greater the centrifugal force, and the greater the stretch of the return spring 29. At this time, the cutting blade 9 extends longer and the cutting surface is wider.

[0083] Once the cutting motor 2 stops operating, the first connecting block 31 will retract and be stored between the upper fixed plate 6 and the lower fixed plate 10 under the action of the return spring 29.

[0084] Each first connecting block 31 is equipped with a cutting blade 9 via a blade mounting mechanism 18. The blade mounting mechanism 18 includes a rotating shaft 33 fixedly mounted on the first connecting block 31, a second connecting block 32 rotatably mounted on the rotating shaft 33, two spring coils 35 fixedly mounted between the second connecting block 32 and the rotating shaft 33, and the second connecting block 32 and the cutting blade 9 are fixedly connected by bolts.

[0085] The cutting blade 9 and the second connecting block 32 rotate around the rotating shaft 33, and can only rotate 90 degrees. The second connecting block 32 is equipped with a limit block that cooperates with the rotating shaft 33. When the cutting motor 2 stops, the angle between the cutting blade 9 and the first connecting block 31 is 90 degrees. After the cutting motor 2 starts running, under the action of centrifugal force, the cutting blade 9 will drive the second connecting block 32 to rotate around the rotating shaft 33, so that the angle between the cutting blade 9 and the first connecting block 31 becomes 180 degrees.

[0086] The faster the cutting motor 2 rotates, the greater the centrifugal force, and the greater the cutting force of the cutting blade 9.

[0087] Multiple arc-shaped sealing rubber strips 12 are fixedly installed on the upper fixed plate 6 and the lower fixed plate 10. The two matching sealing rubber strips 12 are attached to each other on their closest sides. When the cutting blade 9 rotates around the rotating shaft 33, it will abut against the sealing rubber strip 12, and the sealing rubber strip 12 will scrape off the weeds adhering to the cutting blade 9.

[0088] In addition, the sealing rubber strip 12 can also seal the gap between the upper fixing plate 6 and the lower fixing plate 10, reducing the entry of weeds and debris between the upper fixing plate 6 and the lower fixing plate 10, and has a certain dustproof effect.

[0089] The specific operating steps of this device are as follows:

[0090] The control handle 1 is equipped with a controller that works with the cutting motor 2 to control the operation of the cutting motor 2 and adjust the output power of the cutting motor 2 according to the cutting scenario;

[0091] Before cutting, the angle between the cutting assembly and the control handle 1 needs to be adjusted according to the operator's height so that the angle between the cutting assembly and the control handle 1 reaches the most comfortable operating angle for the operator, and the cutting assembly is kept parallel to the cutting surface.

[0092] After the angle adjustment is completed, the cutting motor 2 is started by the controller. The cutting motor 2 drives the upper fixed plate 6 to rotate through the torque increasing mechanism. The centrifugal force generated by the rotation will cause the first connecting block 31 to slide between the upper fixed plate 6 and the lower fixed plate 10, so that the blade mounting mechanism 18 on the first connecting block 31 extends out of the upper fixed plate 6, and the cutting blade 9 will also unfold out from the blade mounting mechanism 18 under the action of centrifugal force. At this time, the cutting blade 9, the center point of the first connecting block 31 and the upper fixed plate 6 are on the same straight line.

[0093] When encountering a hard object during the cutting process, the cutting blade 9 collides with the hard object. First, under the pressure, the cutting blade 9 will rotate around the blade mounting mechanism 18, causing the cutting blade 9 to tilt, reducing the impact force between the cutting blade 9 and the hard object, thus protecting the cutting blade 9. At the same time, when the cutting blade 9 is tilted, the impact force on the cutting blade 9 is divided into two directions. One component of the force will cause the cutting blade 9 to continue rotating, while the other component of the force will cause the first connecting block 31 to retract into the upper fixed plate 6 and the lower fixed plate 10, further protecting the cutting blade 9. Once the cutting blade 9 is separated from the hard object, the cutting blade 9 will be restored to its original position for cutting operation under the action of the reset mechanism 16.

[0094] The length of the cutting blade 9 extending out of the upper fixed plate 6 is adjusted by the limiting component 15, which is used to adjust the cutting diameter of the cutting blade 9. At the same time, the limiting component 15 is used to lock the cutting blade 9 to fix the cutting blade 9. It is suitable for high-level cutting without hard objects blocking it. The fixed cutting blade 9 has higher cutting efficiency than the telescopic cutting blade 9.

[0095] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cutting assembly for an agricultural cutting machine comprising a control handle (1), characterized in that, Also include with control handle (1) rotation connection cutting assembly; The cutting assembly comprises a cutting frame (5), which is rotationally connected between the control handle (1), and the cutting wheel assembly (4) is installed on the cutting frame (5); The cutting wheel assembly (4) includes an upper fixed disc (6) and a lower fixed disc (10), the upper fixed disc (6) is fixedly connected between the lower fixed disc (10), the upper fixed disc (6) is fixedly installed with a fixed cover (8), the cutting frame (5) is fixedly installed with a cutting motor (2), the fixed cover (8) and the cutting motor (2) are installed with a torque increasing mechanism, which is used for increasing the torque of the cutting wheel assembly (4); A plurality of first connecting blocks (31) are slidably installed between the upper fixed disc (6) and the lower fixed disc (10), the lower fixed disc (10) is rotationally connected with the cutting frame (5), a plurality of limiting assemblies (15) matched with the corresponding first connecting blocks (31) are installed on the upper fixed disc (6), a reset mechanism (16) is installed between each first connecting block (31) and the upper fixed disc (6) and the lower fixed disc (10), and a cutting blade (9) is installed on each first connecting block (31) through a blade mounting mechanism (18); The limiting assembly (15) comprises a threaded cylinder (11) fixedly installed on the upper fixed disc (6), a threaded sleeve (13) threadedly rotatably installed on the threaded cylinder (11), and a moving ring (14) rotatably installed on the threaded sleeve (13), wherein the moving ring (14) is slidably connected with the threaded cylinder (11); The moving ring (14) is fixedly installed with a connecting hinge (17), the connecting hinge (17) is rotatably installed with a push-pull rod (24), the end of the push-pull rod (24) away from the push-pull rod (24) is rotatably installed with a moving plate (23), the moving plate (23) is slidably connected with the upper fixed disc (6), and the upper fixed disc (6) is installed with a tooth column (19) through a sliding mechanism; The tooth column (19) is fixedly installed with a damping sliding sleeve (25), the damping sliding sleeve (25) is slidably installed with a damping sliding rod (26) matched with the first connecting block (31), and a stroke amplification mechanism is installed between the tooth column (19) and the moving plate (23); The stroke amplification mechanism comprises a gear (22) rotatably installed on the moving plate (23), the upper fixed disc (6) is fixedly installed with a toothed plate (21) engaged with the gear (22), and a plurality of tooth grooves engaged with the gear (22) are formed in the tooth column (19); The reset mechanism (16) comprises a fixed plate (28) fixedly installed between the upper fixed disc (6) and the lower fixed disc (10), a plurality of limiting telescopic rods (30) are fixedly installed between the first connecting block (31) and the fixed plate (28), a plurality of reset springs (29) are fixedly installed between the first connecting block (31) and the fixed plate (28), and each reset spring (29) is sleeved outside the corresponding limiting telescopic rod (30). The torque increasing mechanism comprises a variable speed helical gear (7) fixedly installed on the fixed cover (8), a helical gear fixedly installed on the driving end of the cutting motor (2) and engaged with the variable speed helical gear (7), and the diameter of the helical gear is smaller than that of the variable speed helical gear (7); the sliding mechanism comprises two fixed blocks (20) fixedly installed on both sides of the tooth column (19), and a plurality of limiting sliding columns (27) are rotatably installed on the two fixed blocks (20); the upper fixed disc (6) is provided with two groove bodies matched with the corresponding limiting sliding columns (27); the blade mounting mechanism (18) comprises a rotating shaft (33) fixedly installed on the first connecting block (31), a second connecting block (32) rotatably installed on the rotating shaft (33), and two spring coils (35) fixedly installed between the second connecting block (32) and the rotating shaft (33); and the second connecting block (32) is fixedly connected with the cutting blade (9) through bolts; The inclination angle change of the push-pull rod (24) means that the horizontal position of the end of the push-pull rod (24) away from the connecting hinge (17) will change, and the push-pull rod (24) will drive the tooth column (19) to move through the stroke amplification mechanism, thereby driving the damping sliding sleeve (25) and the damping sliding rod (26) to move, and the height of the damping sliding rod (26) is adjustable to limit the first connecting block (31); By arranging the stroke expansion structure, the displacement of the moving plate (23) is expanded, the damping sliding rod (26) is adjusted for a long distance by a small distance movement of the threaded sleeve (13), the overall thickness of the cutting wheel assembly (4) is reduced, the volume of the cutting wheel assembly (4) is reduced, the wind resistance is reduced, the energy utilization rate of the cutting motor (2) is improved, and the cutting efficiency is improved; The cutting frame (5) is provided with a protective cover (3) matched with the cutting wheel assembly (4), the protective cover (3) and the cutting frame (5) are connected in a damping rotating mode, the rotating shaft (33) is provided with a slot (34) matched with the damping sliding rod (26), the slot (34) is provided with two insertion holes, and the end of the damping sliding rod (26) close to the rotating shaft (33) is fixedly provided with two insertion rods matched with the corresponding insertion holes; The use method of the cutting assembly for the agricultural cutting machine comprises the following steps: S1, a controller matched with the cutting motor (2) is installed on the handle (1) to control the operation of the cutting motor (2) and adjust the output power of the cutting motor (2) according to the cutting scene; S2, before cutting, the angle between the cutting assembly and the control handle (1) needs to be adjusted according to the height of the operator, so that the angle between the cutting assembly and the control handle (1) reaches the most comfortable operating angle of the operator, and the cutting assembly is kept parallel to the cutting surface. S3, after the angle adjustment is completed, the cutting motor (2) is started through the controller control, the cutting motor (2) drives the upper fixed disc (6) to rotate through the moment increasing mechanism, the centrifugal force generated by rotation drives the first connecting block (31) to slide between the upper fixed disc (6) and the lower fixed disc (10), so that the blade mounting mechanism (18) on the first connecting block (31) extends out of the upper fixed disc (6), and the cutting blade (9) also unfolds from the blade mounting mechanism (18) under the action of centrifugal force, at this time, the cutting blade (9), the first connecting block (31) and the center point of the upper fixed disc (6) are located on the same straight line; S4, when hard obstacles are encountered during cutting, the cutting blade (9) collides with the hard obstacles, which first drives the cutting blade (9) to rotate around the blade mounting mechanism (18) under the pressure, so that the cutting blade (9) is inclined, reducing the impact force between the cutting blade (9) and the hard obstacles, for protecting the cutting blade (9), at the same time, the cutting blade (9) is inclined, the impact force on the cutting blade (9) is divided into two directions, one of which will make the cutting blade (9) continue to rotate, and the other will make the first connecting block (31) retract into the upper fixed disc (6) and the lower fixed disc (10), for further protecting the cutting blade (9), once the cutting blade (9) is separated from the hard obstacles, the cutting blade (9) is restored to the original position for cutting operation under the action of the reset mechanism (16); S5, the length of the cutting blade (9) extending out of the upper fixed disc (6) is adjusted by the limiting assembly (15), for adjusting the cutting diameter of the cutting blade (9), at the same time, the limiting assembly (15) is used to lock the cutting blade (9), for fixing the cutting blade (9), which is suitable for high cutting without hard obstacles, the fixed cutting blade (9) has higher cutting efficiency compared with the telescopic cutting blade (9).

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