A rotating head for a weed cutter

Abstract

This utility model discloses a rotating head for a weeding machine, specifically relating to the technical field of weeding equipment. It includes a cutter head, with a power input shaft fixedly mounted on the top and multiple connecting cylinders fixedly mounted on the bottom. Each connecting cylinder has an internal disassembly mechanism, comprising a connecting block inserted into the cylinder. A blade is fixedly mounted on one side of the connecting block, and L-shaped inserts are fixedly mounted on both sides of the connecting block. Frames are fixedly mounted on both sides of the connecting cylinder. L-shaped fixing strips are inserted into the L-shaped inserts, and the L-shaped fixing strips are bolted to the frames. Threaded grooves are provided inside both the connecting cylinder and the connecting block. This utility model enables quick and secure blade installation, ensuring no loosening during high-speed cutting. Furthermore, the structural design balances connection strength with ease of assembly and disassembly, enhancing safety and equipment durability.

Description

Technical Field

[0001] This utility model relates to the field of weeding equipment technology, and more specifically, to a rotating head for a weeding machine. Background Technology

[0002] As an important piece of equipment used for weeding in landscaping, agriculture and other fields, the performance of a weed cutter directly affects its efficiency and effectiveness. The rotating head is the core working component of the weed cutter. A well-designed rotating head can cut weeds efficiently and accurately while reducing the impact on the surrounding environment and crops.

[0003] The existing grass trimming ropes used by various organizations are made of plastic strips, mostly high-density polyethylene, which are prone to breaking if they come into contact with metal objects in the grass.

[0004] A search revealed that Chinese patent CN108925213A discloses a handheld weed cutter with a rotating head. This mechanism adjusts the extension length of the weeding rope via a rotating handle and a toggle knob. The weeding rope is wear-resistant, and the addition of twisted steel wire rope provides high toughness and prevents breakage. Furthermore, the polypropylene resin material is modified by adding phenolic and urea-formaldehyde resins, enhancing its wear resistance, corrosion resistance, and aging resistance. The calcination treatment of diatomaceous earth increases its specific surface area, followed by soaking in hydrochloric acid solution to improve surface reactivity. Treatment with a silane coupling agent improves the compatibility of inorganic materials such as diatomaceous earth, alumina, and glass fiber with the resin material, significantly enhancing wear resistance and impact strength.

[0005] However, in actual use, the weeding rope is subjected to continuous impact and tension when it rotates at high speed to cut weeds. The basic connection method of simple winding is difficult to withstand the long-term high-frequency force. It is easy for the connection to loosen during continuous operation, causing the position of the weeding rope to shift and affecting the uniformity of the weeding effect. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rotating head for a weed cutter to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A weeding machine rotating head includes a blade disc, a power input shaft is fixedly installed on the top of the blade disc, and a plurality of connecting cylinders are fixedly installed on the bottom of the blade disc, with a disassembly mechanism installed inside the connecting cylinders;

[0009] The disassembly mechanism includes a connecting block inserted into the connecting cylinder. A blade is fixedly installed on one side of the connecting block, and L-shaped inserts are fixedly installed on both sides of the connecting block. Insert frames are fixedly installed on both sides of the connecting cylinder. An L-shaped fixing strip is inserted into the L-shaped insert, and the L-shaped fixing strip and the insert frame are locked together by bolts.

[0010] Both the connecting cylinder and the connecting block have threaded grooves inside, and threaded columns are threadedly connected inside the threaded grooves.

[0011] The blades of the rotating head are evenly distributed on the edge of the cutter head, and the L-shaped insert is inserted into the frame.

[0012] By adopting the above technical solutions, the blades can be quickly installed and firmly fixed, ensuring that they do not loosen during high-speed cutting. Moreover, the blades are evenly distributed to ensure the complete cutting trajectory, improving weeding efficiency. The structural design takes into account both connection strength and ease of disassembly and assembly, reducing maintenance difficulty, reducing operational failures, and enhancing safety and equipment durability.

[0013] As a further description of the above technical solution: an anti-loosening mechanism is provided on one side of the connecting cylinder. The anti-loosening mechanism includes a sliding groove opened inside the connecting cylinder. A rotating ring is rotatably arranged inside the sliding groove. The cross-section of the rotating ring is T-shaped. A connecting plate is fixedly arranged at one end of the rotating ring. A threaded rod is rotatably arranged on one side of the connecting plate.

[0014] The threaded rod is threadedly connected to a movable sleeve plate. A guide plate is fixedly provided at one end of the connecting plate. A through hole is opened on the surface of the movable sleeve plate, and the guide plate is slidably connected to the through hole.

[0015] By adopting the above technical solution: the T-shaped swivel rotates in the slide groove, which can flexibly adjust the position of the connecting plate, so that the hexagonal fixing block can be precisely aligned with the fixing groove. The threaded rod and the moving sleeve are threaded together. Combined with the limiting effect of the guide plate, the fixing block can be smoothly driven to be tightly inserted into the fixing groove, forming a reliable mechanical lock, effectively preventing the threaded column from loosening, ensuring the blade connection is stable, and improving the safety of operation and the stability of the equipment.

[0016] As a further description of the above technical solution: a hexagonal fixing block is fixedly provided on one side of the movable sleeve plate, a fixing head is fixedly provided at one end of the threaded column, a fixing groove is provided on the surface of the fixing head, and the hexagonal fixing block is inserted into the fixing groove;

[0017] The surface of the cutter head is threaded with a protective cover, and a buffer pad is fixedly installed on the inner wall of the protective cover. The surface of each blade is coated with a wear-resistant coating.

[0018] By adopting the above technical solution: the hexagonal fixing block is inserted into the fixing groove to form a mechanical lock, which further prevents the threaded column from loosening and improves the connection reliability. Moreover, the protective cover and the buffer pad work together to enhance the safety of operation and reduce the splashing of debris. The wear-resistant coating on the blade surface extends the service life, reduces the replacement frequency, and improves the overall stability and durability of the equipment.

[0019] The technical effects and advantages of this utility model are as follows:

[0020] By incorporating a disassembly mechanism, compared to existing technologies, the L-shaped insert and the insert frame enable rapid initial positioning of the blade, eliminating the need for complex alignment operations and significantly reducing installation difficulty. The threaded connection between the threaded column and the threaded groove further enhances the tightness of the connecting block and the connecting cylinder, improving the stability of the blade during high-speed rotational cutting. Furthermore, the bolt locking design between the L-shaped fixing strip and the insert frame forms a multi-layered fixing structure, effectively resisting vibration and impact during the cutting process and preventing the blade from loosening and falling off. When replacing the blade, simply remove the bolts, pull out the fixing strip, and unscrew the threaded column to quickly remove the old blade. Installing a new blade is done by reversing the process, significantly shortening replacement time and improving maintenance efficiency. This detachable design balances connection strength and ease of operation, ensuring operational safety while reducing usage and maintenance costs.

[0021] By incorporating an anti-loosening mechanism, compared to existing technologies, the rotating ring drives the connecting plate and other components to rotate, precisely aligning the hexagonal fixing block with the fixing groove. Then, a threaded rod drives the moving sleeve plate along the guide plate, achieving a tight fit between the hexagonal fixing block and the fixing groove. This effectively restricts the rotation of the threaded column, preventing thread loosening due to vibration during machine head operation and ensuring a consistently stable blade connection. Furthermore, the sliding fit between the guide plate and the moving sleeve plate guarantees a precise and stable fixing process, preventing component misalignment and wear. It can withstand the alternating loads of cutting operations for extended periods. Simultaneously, in conjunction with the protective cover installation, this multi-layered protection enhances equipment operational safety, reduces downtime due to loosening, extends the overall machine's lifespan, and lowers maintenance frequency and costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram showing the detailed structure of the cutter head of this utility model.

[0024] Figure 3 This is a schematic diagram of the disassembly structure of the disassembly mechanism of this utility model.

[0025] Figure 4 This is a cross-sectional structural diagram of the disassembly mechanism of this utility model.

[0026] Figure 5This is a schematic diagram of the anti-loosening mechanism of this utility model.

[0027] The attached diagram is labeled as follows: 1. Cutter head; 2. Power input shaft; 3. Connecting cylinder; 4. Connecting block; 5. Blade; 6. L-shaped insert; 7. Insert frame; 8. L-shaped fixing strip; 9. Threaded groove; 10. Threaded column; 11. Rotary ring; 12. Connecting plate; 13. Threaded rod; 14. Moving sleeve; 15. Guide plate; 16. Hexagonal fixing block; 17. Fixing head; 18. Fixing groove; 19. Protective cover; 20. Buffer pad. Detailed Implementation

[0028] 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.

[0029] The embodiments disclosed in this application are as follows: Figure 1-5 The rotating head of a weed cutter shown includes a cutter head 1, a power input shaft 2 fixedly mounted on the top of the cutter head 1, and multiple connecting cylinders 3 fixedly mounted on the bottom of the cutter head 1. A disassembly mechanism is provided inside the connecting cylinders 3.

[0030] The disassembly mechanism includes a connecting block 4 inserted into the connecting cylinder 3, a blade 5 fixedly installed on one side of the connecting block 4, L-shaped inserts 6 fixedly installed on both sides of the connecting block 4, insert frames 7 fixedly installed on both sides of the connecting cylinder 3, and an L-shaped fixing strip 8 inserted into the L-shaped insert 6. The L-shaped fixing strip 8 and the insert frame 7 are locked together by bolts.

[0031] Both the connecting cylinder 3 and the connecting block 4 have threaded grooves 9 inside, and threaded columns 10 are threadedly connected inside the threaded grooves 9.

[0032] The rotating head blades 5 are evenly distributed on the edge of the cutter head 1, and the L-shaped inserts 6 are inserted into the insert frame 7;

[0033] Align the connecting block 4 with the inside of the connecting cylinder 3, and insert the L-shaped inserts 6 on both sides of the connecting block 4 into the insert frames 7 on both sides of the connecting cylinder 3 to achieve the initial positioning of the blade 5.

[0034] Then, after the L-shaped insert 6 is fully inserted into the insert frame 7, the threaded groove 9 inside the connecting cylinder 3 and the connecting block 4 is aligned. Align the threaded post 10 with the threaded groove 9 and rotate the threaded post 10 clockwise to make it tightly threadedly connected with the threaded groove 9, further strengthening the connection between the connecting block 4 and the connecting cylinder 3.

[0035] Furthermore, an L-shaped fixing strip 8 is inserted inside the L-shaped insert 6, so that the L-shaped fixing strip 8 fits against the insert frame 7. Then, bolts are passed through the corresponding holes of the L-shaped fixing strip 8 and the insert frame 7, and the bolts are tightened to lock the two together, thus completing the installation and fixing of the blade 5. After multiple blades 5 are installed, the blades 5 are evenly distributed on the edge of the cutter head 1 to ensure the integrity of the cutting trajectory.

[0036] Reference Figure 2-3 As shown, a loosening mechanism is provided on one side of the connecting cylinder 3. The loosening mechanism includes a groove opened inside the connecting cylinder 3. A rotating ring 11 is rotatably arranged inside the groove. The cross-section of the rotating ring 11 is T-shaped. A connecting plate 12 is fixedly arranged at one end of the rotating ring 11. A threaded rod 13 is rotatably arranged on one side of the connecting plate 12.

[0037] The threaded rod 13 is threadedly connected to a movable sleeve 14. One end of the connecting plate 12 is fixedly provided with a guide plate 15. The surface of the movable sleeve 14 is provided with a through hole, and the guide plate 15 is slidably connected to the through hole.

[0038] Rotate the rotating ring 11 to drive the connecting plate 12, threaded rod 13, guide plate 15 and other components to rotate as a whole until the hexagonal fixing block 16 is aligned with the fixing groove 18 on the fixing head 17 at one end of the threaded column 10.

[0039] Next, rotate the threaded rod 13. Since the movable sleeve 14 is threadedly connected to the threaded rod 13 and the guide plate 15 is slidably connected to the through hole of the movable sleeve 14, the rotation of the movable sleeve 14 is restricted, causing it to move towards the fixed head 17 along the direction of the guide plate 15. When the hexagonal fixing block 16 on one side of the movable sleeve 14 is fully inserted into the fixing groove 18, stop rotating the threaded rod 13. At this time, the threaded column 10 is restricted from rotating to prevent it from loosening when the machine head is working.

[0040] Reference Figure 1 , 4 As shown in Figure 5, a hexagonal fixing block 16 is fixedly installed on one side of the movable sleeve plate 14, and a fixing head 17 is fixedly installed at one end of the threaded column 10. A fixing groove 18 is opened on the surface of the fixing head 17, and the hexagonal fixing block 16 is inserted into the fixing groove 18.

[0041] The surface of the cutter head 1 is threaded with a protective cover 19, and a buffer pad 20 is fixedly installed on the inner wall of the protective cover 19. The surface of the blades 5 is coated with a wear-resistant coating.

[0042] Align the protective cover 19 with the surface of the cutter head 1, aligning the internal thread of the protective cover 19 with the external thread of the cutter head 1. Then rotate the protective cover 19 clockwise to gradually tighten it along the thread on the surface of the cutter head 1 until the protective cover 19 fits tightly against the cutter head 1. At this time, the protective cover 19 completely covers the blade 5, and the buffer pad 20 and the outer periphery of the blade 5 form a buffer space.

[0043] Working principle of this utility model:

[0044] This utility model is a rotating head for a weed cutter. When using this device, prepare the blade 5 to be installed, then align the connecting block 4 with the inside of the connecting cylinder 3, so that the L-shaped inserts 6 on both sides of the connecting block 4 are inserted into the insert frames 7 on both sides of the connecting cylinder 3 respectively, thereby achieving the initial positioning of the blade 5.

[0045] Then, after the L-shaped insert 6 is fully inserted into the insert frame 7, the threaded groove 9 inside the connecting cylinder 3 and the connecting block 4 is aligned. Align the threaded post 10 with the threaded groove 9 and rotate the threaded post 10 clockwise to make it tightly threadedly connected with the threaded groove 9, further strengthening the connection between the connecting block 4 and the connecting cylinder 3.

[0046] Furthermore, an L-shaped fixing strip 8 is inserted inside the L-shaped insert 6, so that the L-shaped fixing strip 8 fits against the insert frame 7. Then, bolts are passed through the corresponding holes of the L-shaped fixing strip 8 and the insert frame 7, and the bolts are tightened to lock the two together, thus completing the installation and fixing of the blade 5. After multiple blades 5 are installed, the blades 5 are evenly distributed on the edge of the cutter head 1 to ensure the integrity of the cutting trajectory.

[0047] Then rotate the rotating ring 11 to drive the connecting plate 12, threaded rod 13, guide plate 15 and other components to rotate as a whole until the hexagonal fixing block 16 is aligned with the fixing groove 18 on the fixing head 17 at one end of the threaded column 10.

[0048] Next, rotate the threaded rod 13. Since the movable sleeve 14 is threadedly connected to the threaded rod 13 and the guide plate 15 is slidably connected to the through hole of the movable sleeve 14, the rotation of the movable sleeve 14 is restricted, causing it to move towards the fixed head 17 along the direction of the guide plate 15. When the hexagonal fixing block 16 on one side of the movable sleeve 14 is fully inserted into the fixing groove 18, stop rotating the threaded rod 13. At this time, the threaded column 10 is restricted from rotating to prevent it from loosening when the machine head is working.

[0049] Then align the protective cover 19 with the surface of the cutter head 1, so that the internal thread of the protective cover 19 is aligned with the external thread of the cutter head 1. Then rotate the protective cover 19 clockwise to gradually tighten it along the thread on the surface of the cutter head 1 until the protective cover 19 fits tightly against the cutter head 1. At this time, the protective cover 19 completely covers the blade 5, and the buffer pad 20 and the outer periphery of the blade 5 form a buffer space.

[0050] When needed, the power input shaft 2 is installed with an external motor. After the external motor is started, the power source of the external motor drives the power input shaft 2 to rotate, and transmits the power to the cutter head 1 through the power input shaft 2, causing the cutter head 1 to rotate at high speed. When the cutter head 1 rotates, it drives the blades 5 installed at the bottom to rotate synchronously. Since the surface of the blades 5 is coated with a wear-resistant coating, its wear resistance and cutting ability are enhanced. During the rotation, the blades 5 use the centrifugal force and sharp edge generated by the high-speed rotation to cut the weeds they come into contact with. The straight blades achieve shearing, and multiple evenly distributed blades 5 form a continuous cutting trajectory to ensure that the weeds are effectively removed.

[0051] The protective cover 19 plays a key protective role during operation, blocking grass clippings, stones and other debris that fly when the blade 5 rotates at high speed, thus preventing injury to the operator. The buffer pad 20 on the inner wall can reduce the impact force generated when debris hits the protective cover 19, and reduce noise and wear on the protective cover 19.

[0052] If the blade 5 is worn, damaged, or needs to be replaced, first unscrew the bolts connecting the L-shaped fixing strip 8 and the insert frame 7, pull out the L-shaped fixing strip 8, then rotate the threaded rod 13 in the opposite direction to disengage the hexagonal fixing block 16 from the fixing groove 18, rotate the rotating ring 11 to remove the anti-loosening mechanism, and finally rotate the threaded column 10 counterclockwise to disengage it from the threaded groove 9. Then the connecting block 4 can be pulled out of the connecting cylinder 3. After replacing the new blade 5, the installation process can be reversed.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotating head for a weed cutter, comprising a blade disc (1), characterized in that: A power input shaft (2) is fixedly installed on the top of the cutter head (1), and a plurality of connecting cylinders (3) are fixedly installed on the bottom of the cutter head (1). A disassembly mechanism is installed inside the connecting cylinders (3). The disassembly mechanism includes a connecting block (4) inserted into the connecting cylinder (3), a blade (5) fixedly installed on one side of the connecting block (4), L-shaped inserts (6) fixedly installed on both sides of the connecting block (4), insert frames (7) fixedly installed on both sides of the connecting cylinder (3), and an L-shaped fixing strip (8) inserted into the inside of the L-shaped insert (6). The L-shaped fixing strip (8) and the insert frame (7) are locked together by bolts. Both the connecting cylinder (3) and the connecting block (4) have threaded grooves (9) inside, and the threaded grooves (9) are threaded with threaded columns (10).

2. The rotating head of the weeder according to claim 1, characterized in that: The blades (5) of the rotating head are evenly distributed on the edge of the cutter head (1), and the L-shaped insert (6) is inserted into the insert frame (7).

3. The rotating head of the weeder according to claim 1, characterized in that: The connecting cylinder (3) is provided with an anti-loosening mechanism on one side. The anti-loosening mechanism includes a sliding groove opened inside the connecting cylinder (3). A rotating ring (11) is rotatably provided inside the sliding groove. The cross-section of the rotating ring (11) is T-shaped. A connecting plate (12) is fixedly provided at one end of the rotating ring (11). A threaded rod (13) is rotatably provided on one side of the connecting plate (12).

4. The rotating head of the weeder according to claim 3, characterized in that: The threaded rod (13) is threadedly connected to a movable sleeve plate (14), and a guide plate (15) is fixedly provided at one end of the connecting plate (12). A through hole is provided on the surface of the movable sleeve plate (14), and the guide plate (15) is slidably connected to the through hole.

5. The rotating head of the weeder according to claim 4, characterized in that: A hexagonal fixing block (16) is fixedly provided on one side of the movable sleeve plate (14), and a fixing head (17) is fixedly provided at one end of the threaded column (10). A fixing groove (18) is provided on the surface of the fixing head (17), and the hexagonal fixing block (16) is inserted into the fixing groove (18).

6. The rotating head of the weeder according to claim 1, characterized in that: The surface of the cutter head (1) is threaded with a protective cover (19), and a buffer pad (20) is fixedly provided on the inner wall of the protective cover (19). The surface of the blade (5) is provided with a wear-resistant coating.

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