Cutting assembly for agricultural cutting machine and using method

Abstract

The invention discloses a cutting assembly for an agricultural cutting machine and a using method, and relates to the technical field of agricultural cutting. The cutting assembly comprises a control grab handle and further comprises a cutting assembly body rotationally connected with the control grab handle; the cutting assembly comprises a cutting frame, the cutting frame is rotationally connected with the control grab handle, and a cutting wheel assembly is installed on the cutting frame; the cutting wheel assembly comprises an upper fixing disc and a lower fixing disc, the upper fixing disc and the lower fixing disc are fixedly connected, a fixing cover is fixedly installed on the upper fixing disc, and a cutting motor is fixedly installed on the cutting frame. The cutting device has the advantages that the cutting blade is driven to move by centrifugal force generated during rotary cutting, so that the cutting blade elastically stretches out and draws back within a certain range, the cutting blade is automatically bent and folded when making contact with a hard object, the probability of breaking of the cutting blade is reduced, in addition, the cutting blade can be locked according to requirements, and the cutting device is used for cutting places without hard objects and is convenient to use. The cutting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural cutting, and in particular to a cutting assembly for an agricultural cutting machine and a use method thereof. Background Art

[0002] As a kind of cutting equipment among agricultural cutting machines, lawn mowers are usually used in home gardens, parks, sports fields, road green belts and other places. Its main function is to cut the grass on the lawn to a certain height through rotating blades or other cutting devices, so as to keep the lawn neat and beautiful.

[0003] Existing blade mowers use two types of cutting blades, disc type or protruding type. When not in use, a protective cover is usually used to cover and protect the blade. During the cutting process, if a hard object is encountered, the blade will collide with the hard object and cause the blade to deform. Therefore, publication number CN214385124U discloses a retractable lawn mower blade, which includes a connecting part, both ends of the connecting part are provided with cutting parts, the two cutting parts are symmetrical in center, a plug-in hole is opened on the connecting part along the length direction, the cutting part is slidably connected to the plug-in hole, a first fixing hole is opened on the cutting part, and a plurality of second fixing holes matching the first fixing holes are opened on the connecting part.

[0004] The above-mentioned retractable lawn mower blade is provided with reinforcing ribs, which enhance the structural strength between the first horizontal section and the curved section and between the second horizontal section and the curved section, thereby reducing the possibility of the blade breaking due to cutting hard objects during the high-speed rotation of the blade as a whole, and improving the overall safety and stability of the cutting part. At the same time, the cutting part is movable relative to the connecting part, and the length of the blade as a whole can be adjusted to adapt to blocking covers of different specifications, thereby improving the versatility of the blade as a whole. The cooperation of the limit block and the limit groove fixes the moving range of the cutting part in the plug-in hole to avoid the situation where the cutting part is detached from the connecting part.

[0005] However, when the above-mentioned retractable lawn mower blade is used, since the blade and the blade holder are fixedly connected, when the blade holder rotates, the blade will be driven to rotate rapidly. Although reinforcing ribs are used to strengthen the blade, when it collides with a hard object, the blade edge will be damaged and the stroke will be jerked, affecting the cutting efficiency. In addition, a plurality of blades are arranged on the blade holder. When adjusting the length of the blade, each blade needs to be adjusted separately, which is cumbersome to operate and has low adjustment efficiency.

[0006] Therefore, a novel cutting assembly and use method for an agricultural cutting machine can be adopted to solve the deficiencies of the prior art. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the prior art and to propose a cutting assembly for an agricultural cutting machine and a method of use.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A cutting assembly for an agricultural cutting machine, comprising a control handle and a cutting assembly rotatably connected to the control handle;

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

[0011] The cutting wheel assembly comprises an upper fixed plate and a lower fixed plate, the upper fixed plate and the lower fixed plate are fixedly connected, a fixed cover is fixedly installed on the upper fixed plate, a cutting motor is fixedly installed on the cutting frame, and a torque increasing mechanism is installed between the fixed cover and the cutting motor for increasing the torque of the cutting wheel assembly;

[0012] A plurality of 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, a plurality of limiting components matching the corresponding first connecting blocks are installed on the upper fixed plate, a reset mechanism is installed between each of the first connecting blocks and the upper fixed plate and the lower fixed plate, and a cutting blade is installed on each of the first connecting blocks through a blade installation mechanism.

[0013] Preferably, a protective cover matched with the cutting wheel assembly is installed on the cutting frame, and the protective cover and the cutting frame are connected in a damping rotation manner.

[0014] Preferably, the torque increasing mechanism comprises a speed changing bevel gear fixedly mounted on the fixed cover, a bevel gear meshing with the speed changing bevel gear is fixedly mounted on the driving end of the cutting motor, and the diameter of the bevel gear is smaller than the diameter of the speed changing bevel gear.

[0015] Preferably, the limiting assembly comprises a threaded barrel fixedly mounted on the upper fixed plate, a threaded sleeve is threadedly mounted on the threaded barrel, a movable ring is rotatably mounted on the threaded sleeve, and the movable ring is slidably connected to the threaded barrel;

[0016] The movable ring is fixedly provided with a connecting hinge, a push-pull rod is rotatably provided on the connecting hinge, a movable plate is rotatably provided on one 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 tooth column is provided on the upper fixed plate through a sliding mechanism;

[0017] A damping sliding sleeve is fixedly mounted on the gear column, a damping sliding rod matched with the first connecting block is slidably mounted on the damping sliding sleeve, and a stroke amplification mechanism is mounted between the gear column and the moving plate.

[0018] Preferably, the sliding mechanism comprises fixed blocks fixedly mounted on both sides of the gear column, a plurality of limit sliding columns are rotatably mounted on the two fixed blocks, and the upper fixed plate is provided with two grooves matched with the corresponding limit sliding columns.

[0019] Preferably, the stroke amplification mechanism comprises a gear rotatably mounted on the movable plate, a tooth plate meshing with the gear is fixedly mounted on the upper fixed plate, and a plurality of tooth grooves meshing with the gear are formed on the tooth 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 limit telescopic rods are fixedly installed between the first connecting block and the fixed plate, and a plurality of reset springs are fixedly installed between the first connecting block and the fixed plate, and each of the reset springs is sleeved on the outside of the corresponding limit telescopic rod.

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

[0022] Preferably, a slot matching with the damping slide rod is provided on the rotating shaft, two insertion holes are provided in the slot, and two insertion rods matching with the corresponding insertion holes are fixedly mounted on one end of the damping slide rod close to the rotating shaft.

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

[0024] S1. A controller matching 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 scene;

[0025] S2. Before cutting, the angle between the cutting assembly and the control handle needs to be adjusted according to the height of the operator, 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 controller controls the cutting motor to start, and the cutting motor drives the upper fixed disk to rotate through the torque increasing mechanism. The centrifugal force generated by the rotation drives the first connecting block to slide between the upper fixed disk and the lower fixed disk, so that the blade mounting mechanism on the first connecting block extends out of the upper fixed disk, and the cutting blade is also deployed from the blade mounting mechanism under the action of the centrifugal force. At this time, the cutting blade and the center point of the fixed disk above the first connecting block are located 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, the cutting blade is driven to rotate around the blade mounting mechanism under the pressure force, so that the cutting blade is tilted, and the impact force between the cutting blade and the hard object is reduced to protect 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. The force in one direction causes the cutting blade to continue to rotate, and the force in the other direction causes the first connecting block to retract into the upper fixed plate and the lower fixed plate to further protect the cutting blade. Once the cutting blade is separated from the hard object, the cutting blade is restored to its original position under the action of the reset mechanism to perform the cutting operation;

[0028] S5. The length of the cutting blade extending out of the upper fixed plate is adjusted by a limit assembly, which is used to adjust the cutting diameter of the cutting blade. At the same time, the limit assembly is used to lock the cutting blade to fix the cutting blade. It is suitable for high-position cutting without any hard objects blocking it. The fixed cutting blade has higher cutting efficiency than the telescopic cutting blade.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. When the cutting assembly of the agricultural cutting machine is cutting, the positions of multiple cutting blades can be adjusted at the same time by setting a limit component. The adjustment efficiency is high, and the adjustment displacement of each cutting blade is equal, ensuring that the ends of each cutting blade are on the same circumference, effectively ensuring the cutting efficiency.

[0031] 2. When cutting, the cutting assembly of the agricultural cutting machine realizes the free contraction of the cutting blade by setting a reset mechanism, and realizes the automatic folding and storage of the cutting blade by setting a spring roll. The cutting blade is brought out from between the upper fixed plate and the lower fixed plate by the centrifugal force generated by the rotation during cutting. When encountering hard objects, it can automatically rotate and retract, which can effectively reduce the probability of the cutting blade breaking and effectively protect the cutting blade.

[0032] 3. When the cutting assembly of the agricultural cutting machine is cutting, a movable damping slide rod and a damping slide sleeve are set to limit the movable plate on the cutting blade to control the maximum moving range of the cutting blade, so as to change the cutting radius of the cutting blade. In conjunction with the slot on the rotating shaft, the damping slide rod is inserted into the slot to lock the cutting blade. This is suitable for cutting without hard obstacles, improves the stability of the cutting blade, and thus improves cutting efficiency.

[0033] 4. When the cutting assembly of the agricultural cutting machine is cutting, the displacement of the moving plate in the limit assembly can be expanded by setting a stroke expansion structure, so that the threaded sleeve can move a short distance to achieve long-distance adjustment of the damping slide bar, reduce the overall thickness of the cutting wheel assembly, thereby reducing the volume of the cutting wheel assembly, reducing wind resistance, and improving the energy utilization rate of the cutting motor, thereby improving cutting efficiency.

[0034] To summarize, the present invention utilizes the centrifugal force generated during rotational cutting to drive the cutting blade to move, so that the cutting blade can elastically expand and contract within a certain range, and automatically bend and fold when touching hard objects, thereby reducing the probability of the cutting blade breaking. In addition, the cutting blade can be locked according to needs and used for cutting in places without hard objects, thereby improving cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0036] Figure 1 A schematic structural diagram of a cutting assembly for an agricultural cutting machine proposed by the present invention;

[0037] Figure 2 for Figure 1 Detailed schematic diagram of the structure after being rotated to a certain angle;

[0038] Figure 3 for Figure 1 A detailed diagram of the enlarged structure of the cutting part after it is rotated at a certain angle;

[0039] Figure 4 for Figure 3 Detailed schematic diagram of the structure when the middle protective cover is closed;

[0040] Figure 5 for Figure 4 Detailed diagram of the structure after rotating to a certain angle;

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

[0042] Figure 7 for Figure 6 Detailed schematic diagram of the structure after being rotated to a certain angle;

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

[0044] Fig. 9 for Figure 8 A schematic detailed diagram of the planar structure of the upper and lower fixing plates, the lower fixing plates and the threaded barrel along one of the angles;

[0045] Fig.10 for Fig. 9 A schematic detailed diagram of the three-dimensional structure;

[0046] Fig.11 for Figure 8 A schematic detailed diagram of the planar structure along one of the angles after removing the upper fixed plate;

[0047] Fig.12 for Fig.11 A schematic detailed diagram of the three-dimensional structure;

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

[0049] Fig.14 for Fig.13 A detailed diagram of the enlarged structure of the threaded sleeve, the moving ring and one set of cutting blades;

[0050] Fig.15 for Fig.14 A schematic detailed view of the plan structure along one of the angles;

[0051] Fig.16 for Fig.15 The enlarged structural schematic detail diagram of the A part;

[0052] Fig.17 for Fig.15 Detailed schematic diagram of the three-dimensional structure of the middle A part and the gear column;

[0053] Fig.18 for Fig.14 A schematic diagram of the enlarged structure of the reset mechanism, the blade mounting mechanism and the cutting blade;

[0054] Fig.19 for Fig.18 Detailed diagram of the exploded structure of the middle blade mounting mechanism.

[0055] In the figure: 1 control handle, 2 cutting motor, 3 protective cover, 4 cutting wheel assembly, 5 cutting frame, 6 upper fixed plate, 7 speed change bevel 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 limit 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 sliding sleeve, 26 damping sliding rod, 27 limit sliding column, 28 fixed plate, 29 reset spring, 30 limit telescopic rod, 31 first connecting block, 32 second connecting block, 33 rotating shaft, 34 slot, 35 spring roll. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Example 1: Reference Figure 1-Figure 7 A cutting assembly for an agricultural cutting machine includes a control handle 1 and a cutting assembly rotatably connected to the control handle 1; a controller is installed 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 the control handle 1, and a cutting wheel assembly 4 is installed on the cutting frame 5; a protective cover 3 matching the cutting wheel assembly 4 is installed on the cutting frame 5, and the protective cover 3 and the cutting frame 5 are connected in a damping rotation.

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

[0060] The function of the protective cover 3 is to protect the cutting wheel assembly 4 and reduce the probability of damage to the cutting wheel assembly 4. It is also to protect the surrounding operators and prevent the cutting wheel assembly 4 from being exposed and causing unnecessary risks of cutting. The purpose of using a damped rotation connection is to enable 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, the upper fixed plate 6 and the lower fixed plate 10 are fixedly connected, a fixed cover 8 is fixedly installed on the upper fixed plate 6, a cutting motor 2 is fixedly installed on the cutting frame 5, and a torque increasing mechanism is installed between the fixed cover 8 and the cutting motor 2 for increasing the torque of the cutting wheel assembly 4.

[0062] The rotation of the driving end of the cutting motor 2 will drive the fixed cover 8 to rotate through the torque increasing mechanism, thereby driving 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 will drive the cutting wheel assembly 4 to rotate to perform the cutting operation.

[0063] The torque increasing mechanism comprises a speed changing bevel gear 7 fixedly mounted on a fixed cover 8 , and a bevel gear meshing with the speed changing bevel gear 7 is fixedly mounted on the driving end of the cutting motor 2 , wherein the diameter of the bevel gear is smaller than that of the speed changing bevel gear 7 .

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

[0065] Embodiment 2: This embodiment is different from the embodiment 1 in that: Figure 3-Figure 5 , Figure 8-Figure 19 A plurality of first connection blocks 31 are slidably mounted 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 , and a plurality of limit assemblies 15 matching the corresponding first connection blocks 31 are mounted on the upper fixed plate 6 .

[0066] The limiting assembly 15 includes a threaded barrel 11 fixedly mounted on the upper fixed plate 6, a threaded sleeve 13 is threadedly mounted on the threaded barrel 11, a movable ring 14 is rotatably mounted on the threaded sleeve 13, and the movable ring 14 is slidably connected to the threaded barrel 11;

[0067] The fixing cover 8 is fixedly connected to the lower fixing plate 10 by bolts, and the bolts pass through the threaded tube 11. A through groove is provided in the middle of the upper fixing plate 6 and the lower fixing plate 10 for the bolts to pass through.

[0068] A connecting hinge 17 is fixedly installed on the moving ring 14, a push-pull rod 24 is rotatably installed on the connecting hinge 17, a moving plate 23 is rotatably installed on one end of the push-pull rod 24 away from the push-pull rod 24, the moving plate 23 is slidably connected to the upper fixed plate 6, and a tooth column 19 is installed on the upper fixed plate 6 through a sliding mechanism;

[0069] The sliding mechanism includes fixed blocks 20 fixedly mounted on both sides of the tooth column 19, and a plurality of limit slides 27 are rotatably mounted on the two fixed blocks 20. The upper fixed plate 6 is provided with two grooves matching the corresponding limit slides 27.

[0070] The function of the sliding mechanism is to limit the gear column 19 to ensure that the gear column 19 moves stably. The purpose of the rotational 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 the friction force, making the gear column 19 move more smoothly, and also extending the service life.

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

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

[0073] The threaded sleeve 13 is rotated, and the threaded sleeve 13 moves on the threaded sleeve 11 under the action of the threaded barrel 11. The movement of the threaded sleeve 13 drives the moving ring 14 to move, thereby driving the connecting hinge 17 to move. The movement of the connecting hinge 17 drives the end of the push-pull rod 24 connected to the connecting hinge 17 to move in the vertical direction, and 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 does not move horizontally, but moves at an angle. Both ends of the push-pull rod 24 move in the horizontal and vertical directions, but the inclination angle of the push-pull rod 24 changes;

[0074] The change in the inclination 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, and the push-pull rod 24 will drive the gear column 19 to move through the stroke amplification mechanism, thereby driving the damping sliding sleeve 25 and the damping sliding rod 26 to move. The height of the damping sliding rod 26 is adjustable, and the first connecting block 31 can be limited;

[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, the damping slide rod 26 is limited and stops moving. At this time, the first connecting block 31 reaches the maximum displacement after the limit, which is used to adjust the cutting radius of the cutting blade 9.

[0076] The rotating shaft 33 is provided with a slot 34 that matches with the damping slide bar 26 . Two insertion holes are provided in the slot 34 . One end of the damping slide bar 26 close to the rotating shaft 33 is fixedly mounted with two insertion rods that match with the corresponding insertion holes.

[0077] If the cutting blade 9 needs to be locked, it is only necessary to insert the insertion rod on the damping slide rod 26 into the insertion hole on the rotating shaft 33. Under the action of the insertion rod and the insertion hole, the cutting blade 9 will be locked and the cutting blade 9 will not retract or rotate.

[0078] The stroke amplification mechanism includes a gear 22 rotatably mounted on a moving plate 23 , a tooth plate 21 meshing with the gear 22 is fixedly mounted on the upper fixed plate 6 , and a plurality of tooth grooves meshing with the gear 22 are formed on the tooth column 19 .

[0079] The movement of the movable plate 23 will drive the gear 22 to move, and under the action of the toothed plate 21, the gear 22 will also rotate. At this time, the rotation of the gear 22 will drive the gear column 19 to move, and the gear 22 is still moving, so the displacement of the gear column 19 is greater than the displacement of the movable plate 23, thereby achieving stroke amplification.

[0080] By setting up a stroke expansion structure, the displacement of the movable plate 23 can be expanded, so that the threaded sleeve 13 can move a shorter distance to achieve long-distance adjustment of the damping slide rod 26, reducing the overall thickness of the cutting wheel assembly 4, thereby reducing the volume of the cutting wheel assembly 4, reducing wind resistance, and improving the energy utilization of the cutting motor 2, thereby improving cutting efficiency.

[0081] A reset mechanism 16 is installed between each first connecting block 31 and 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, a plurality of limiting telescopic rods 30 are fixedly installed between the first connecting block 31 and the fixed plate 28, and 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 on the outside of the corresponding limiting telescopic rod 30.

[0082] Under the action of centrifugal force, the reset spring 29 will be stretched. When there is no limit of the damping slide bar 26, the faster the speed of the driving end of the cutting motor 2 is, the greater the centrifugal force is, the greater the stretching amount of the reset spring 29 is, and the longer the cutting blade 9 is extended, the wider the cutting surface is;

[0083] Once the cutting motor 2 stops operating, the first connecting block 31 is reset and retracted to be stored between the upper fixing plate 6 and the lower fixing plate 10 under the action of the reset spring 29 .

[0084] A cutting blade 9 is installed on each first connecting block 31 through a blade mounting mechanism 18. The blade mounting mechanism 18 includes a rotating shaft 33 fixedly mounted on the first connecting block 31, and a second connecting block 32 is rotatably mounted on the rotating shaft 33. Two spring coils 35 are fixedly installed between the second connecting block 32 and the rotating shaft 33. 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 can only rotate ninety degrees around the rotating shaft 33. A limit block matched with the rotating shaft 33 is installed on the second connecting block 32. When the cutting motor 2 stops, the angle between the cutting blade 9 and the first connecting block 31 is ninety degrees. After the cutting motor 2 is operated, 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 one hundred and eighty degrees.

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

[0087] A plurality of arc-shaped sealing rubber strips 12 are fixedly mounted on the upper fixed plate 6 and the lower fixed plate 10. The two matching sealing rubber strips 12 are in contact with each other at their sides close to each other. When the cutting blade 9 rotates around the rotating shaft 33, it will abut against the sealing rubber strip 12, and the weeds adhering to the cutting blade 9 will be scraped off by the sealing rubber strip 12.

[0088] In addition, the sealing rubber strip 12 can also seal the gap between the upper fixed plate 6 and the lower fixed plate 10, reducing the entry of weed debris into the gap between the upper fixed plate 6 and the lower fixed plate 10, and has a certain dust-proof effect.

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

[0090] A controller matching the cutting motor 2 is installed on the control handle 1, which is used to control the operation of the cutting motor 2 and adjust the output power of the cutting motor 2 according to the cutting scene;

[0091] 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 for the operator, and the cutting assembly is kept parallel to the cutting surface;

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

[0093] When encountering a hard object obstruction during the cutting process, the cutting blade 9 collides with the hard object, and firstly, the cutting blade 9 is driven to rotate around the blade mounting mechanism 18 under the pressure force, so that the cutting blade 9 is tilted, and the impact force between the cutting blade 9 and the hard object is reduced, which is used to protect 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, and the component force in one direction causes the cutting blade 9 to continue to rotate, while the component force in the other direction causes the first connecting block 31 to retract into the upper fixed plate 6 and the lower fixed plate 10, which is used to further protect the cutting blade 9. Once the cutting blade 9 is separated from the hard object, the cutting blade 9 is restored to its original position under the action of the reset mechanism 16 for cutting operation;

[0094] The length of the cutting blade 9 extending out of the upper fixed plate 6 is adjusted by the limit assembly 15, which is used to adjust the cutting diameter of the cutting blade 9. At the same time, the limit assembly 15 is used to lock the cutting blade 9 to fix the cutting blade 9. It is suitable for high-position cutting without any 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 specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cutting assembly for an agricultural cutting machine, comprising a control handle (1), characterized in that: Also included is a cutting assembly rotatably connected to the control handle (1); The cutting assembly comprises a cutting frame (5), the cutting frame (5) is rotatably connected to the control handle (1), and a cutting wheel assembly (4) is mounted on the cutting frame (5); The cutting wheel assembly (4) comprises an upper fixed disk (6) and a lower fixed disk (10), the upper fixed disk (6) and the lower fixed disk (10) are fixedly connected, a fixed cover (8) is fixedly mounted on the upper fixed disk (6), a cutting motor (2) is fixedly mounted on the cutting frame (5), and a torque increasing mechanism is installed between the fixed cover (8) and the cutting motor (2) for increasing the torque of the cutting wheel assembly (4); A plurality of first connection blocks (31) are slidably mounted between the upper fixed disk (6) and the lower fixed disk (10); the lower fixed disk (10) is rotatably connected to the cutting frame (5); a plurality of limit assemblies (15) matched with corresponding first connection blocks (31) are mounted on the upper fixed disk (6); a reset mechanism (16) is mounted between each of the first connection blocks (31) and the upper fixed disk (6) and the lower fixed disk (10); and a cutting blade (9) is mounted on each of the first connection blocks (31) via a blade mounting mechanism (18).

2. The cutting assembly for an agricultural cutting machine according to claim 1, characterized in that: A protective cover (3) matched with the cutting wheel assembly (4) is installed on the cutting frame (5), and the protective cover (3) and the cutting frame (5) are connected in a damping rotation manner.

3. The cutting assembly for an agricultural cutting machine according to claim 1, characterized in that: The torque increasing mechanism comprises a speed-changing bevel gear (7) fixedly mounted on a fixed cover (8), and a bevel gear meshing with the speed-changing bevel gear (7) is fixedly mounted on the driving end of the cutting motor (2), wherein the diameter of the bevel gear is smaller than the diameter of the speed-changing bevel gear (7).

4. The cutting assembly for an agricultural cutting machine according to claim 1, characterized in that: The limiting assembly (15) comprises a threaded barrel (11) fixedly mounted on the upper fixed plate (6), a threaded sleeve (13) being threadably mounted on the threaded barrel (11), a movable ring (14) being rotatably mounted on the threaded sleeve (13), and the movable ring (14) being slidably connected to the threaded barrel (11); A connecting hinge (17) is fixedly mounted on the movable ring (14), a push-pull rod (24) is rotatably mounted on the connecting hinge (17), a movable plate (23) is rotatably mounted on one 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), and a tooth column (19) is mounted on the upper fixed plate (6) via a sliding mechanism; A damping sliding sleeve (25) is fixedly mounted on the tooth column (19), a damping sliding rod (26) matched with the first connecting block (31) is slidably mounted on the damping sliding sleeve (25), and a stroke amplification mechanism is installed between the tooth column (19) and the movable plate (23).

5. The cutting assembly for an agricultural cutting machine according to claim 4, characterized in that: The sliding mechanism comprises fixed blocks (20) fixedly mounted on both sides of the tooth column (19), a plurality of limit slides (27) being rotatably mounted on the two fixed blocks (20), and two grooves matching the corresponding limit slides (27) are provided on the upper fixed plate (6).

6. The cutting assembly for an agricultural cutting machine according to claim 4, characterized in that: The stroke amplification mechanism comprises a gear (22) rotatably mounted on a movable plate (23), a tooth plate (21) meshing with the gear (22) is fixedly mounted on the upper fixed plate (6), and a plurality of tooth grooves meshing with the gear (22) are formed on the tooth column (19).

7. The cutting assembly for an agricultural cutting machine according to claim 1, characterized in that: The reset mechanism (16) comprises a fixed plate (28) fixedly mounted between an upper fixed plate (6) and a lower fixed plate (10), a plurality of position-limiting telescopic rods (30) fixedly mounted between the first connecting block (31) and the fixed plate (28), and a plurality of reset springs (29) fixedly mounted between the first connecting block (31) and the fixed plate (28), each of the reset springs (29) being sleeved on the outside of a corresponding position-limiting telescopic rod (30).

8. The cutting assembly for an agricultural cutting machine according to claim 4, characterized in that: The blade mounting mechanism (18) comprises a rotating shaft (33) fixedly mounted on a first connecting block (31), a second connecting block (32) being rotatably mounted on the rotating shaft (33), two spring coils (35) being fixedly mounted between the second connecting block (32) and the rotating shaft (33), and the second connecting block (32) and the cutting blade (9) being fixedly connected via bolts.

9. The cutting assembly for an agricultural cutting machine according to claim 8, characterized in that: The rotating shaft (33) is provided with a slot (34) which matches with the damping slide bar (26), and the slot (34) has two insertion holes, and one end of the damping slide bar (26) close to the rotating shaft (33) is fixedly mounted with two insertion rods which match with the corresponding insertion holes.

10. A method for using a cutting assembly for an agricultural cutting machine, used for a cutting assembly for an agricultural cutting machine as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. A controller matching the cutting motor (2) is installed on the control handle (1) and is used 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 for the operator, and the cutting assembly is kept parallel to the cutting surface; S3, after the angle adjustment is completed, the controller controls the cutting motor (2) to start, and the cutting motor (2) drives the upper fixed disk (6) to rotate through the torque increasing mechanism. The centrifugal force generated by the rotation drives the first connecting block (31) to slide between the upper fixed disk (6) and the lower fixed disk (10), so that the blade mounting mechanism (18) on the first connecting block (31) extends out of the upper fixed disk (6), and the cutting blade (9) is also unfolded from the blade mounting mechanism (18) under the action of the centrifugal force. At this time, the cutting blade (9) and the center points of the first connecting block (31) and the upper fixed disk (6) are located on the same straight line; S4. When encountering a hard object during the cutting process, the cutting blade (9) collides with the hard object. First, the cutting blade (9) is driven to rotate around the blade mounting mechanism (18) under the pressure force, so that the cutting blade (9) is tilted, and the impact force between the cutting blade (9) and the hard object is reduced, so as to protect the cutting blade (9). At the same time, the cutting blade (9) is tilted, and the impact force on the cutting blade (9) is divided into two directions. The component force in one direction causes the cutting blade (9) to continue to rotate, while the component force in the other direction causes the first connecting block (31) to retract into the upper fixed plate (6) and the lower fixed plate (10), so as to further protect the cutting blade (9). Once the cutting blade (9) is separated from the hard object, the cutting blade (9) is restored to its original position under the action of the reset mechanism (16) to perform the cutting operation; S5. The length of the cutting blade (9) extending out of the upper fixed plate (6) is adjusted by a limit assembly (15) for adjusting the cutting diameter of the cutting blade (9). At the same time, the limit assembly (15) is used to lock the cutting blade (9) for fixing the cutting blade (9). The cutting blade (9) is suitable for high-position cutting without any hard objects blocking it. Compared with the telescopic cutting blade (9), the fixed cutting blade (9) has a higher cutting efficiency.

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