Modular brush cutting head

Abstract

The application discloses a modular bush clearing head and belongs to the technical field of garden machinery equipment. The modular bush clearing head comprises a mounting frame used for being connected and mounted with external equipment, a profiled protective cover movably mounted on the outer side of the mounting frame, a center driving shaft rotatably mounted on the inner side of the profiled protective cover, and cutter heads uniformly mounted on the center driving shaft. The mounting frame and the profiled protective cover are connected through a floating suspension mechanism, the floating suspension mechanism controls the profiled protective cover to vertically float, transversely tilt and longitudinally pitch, the outer side of each cutter head is uniformly provided with radial cutter arms, the end portions of the cutter arms are insertedly connected with cutter seats, the cutter seats are rotatably provided with cutting blades, and the cutter arms and the cutter seats are assembled and fixed through positioning assemblies. The modular bush clearing head adopts the floating suspension mechanism, can be effectively and adaptively adjusted in height and angle, is suitable for different operation terrains, and can conveniently assemble and index the cutting blades.

Description

Technical Field

[0001] This invention relates to the field of garden machinery and equipment technology, specifically a modular shrub cleaning head. Background Technology

[0002] In landscaping maintenance, roadside greening, and forest area management, shrub and weed clearing is a routine and fundamental task. Currently, the industry commonly uses handheld brush cutters, fixed clearing heads, or integrated shrub clearing equipment to complete shrub pruning, weed removal, and branch fragmentation. Most existing mainstream shrub clearing heads are integrated fixed structures with high overall structural integration. Components such as the blade assembly, protective structure, connecting base, and transmission components are integrally welded or bolted together, resulting in a single structural form and limited adaptability.

[0003] Existing technology (Chinese patent publication number: CN120240125A, publication date: 2025-07-04) discloses an intelligent shrub clearing and weeding machine for mountain orchards, belonging to the field of intelligent agricultural machinery technology. Its core structure is an adaptive tracked chassis, including a chassis shell and two side tracks. Through the extension and retraction of the wheel support hydraulic rods in conjunction with the triangular frame and driven wheels, the contact area between the tracks and the ground can be dynamically adjusted, significantly improving the machine's passability and stability on complex mountainous terrain. In addition, the machine is equipped with a deformation mechanism that can automatically adjust the level of the working mechanism according to the terrain, ensuring stable operation on slopes and undulating terrain. The control and power system achieves centralized drive control of each power mechanism, further improving the convenience and intelligence of operation. Existing technology (Chinese Patent No. CN211531938U, Publication Date: 2020-09-22) discloses a user-friendly shrub clearing device for forestry planting, belonging to the field of forestry equipment technology. It includes two fixed plates, each with a motor mounted on a side facing away from the others. The left and right sides of the motor body are fixedly connected to the front of the fixed plates via fixing blocks. The output shaft of the motor is fixedly connected to the surface of a first rotating shaft via a transmission device. This user-friendly shrub clearing device, by incorporating rollers, shredders, and a cutting device, allows the cutting device to rotate along with the rollers while the rollers drive the shredders to rotate and clear the shrubs. The rollers and shredders clear the roots of shrubs close to the ground, while the cutting device clears the branches and leaves at higher points. This simultaneous clearing of shrubs at different heights increases the efficiency of shrub clearing, reduces the labor intensity of workers, and facilitates shrub clearing for planting. The prior art (Chinese patent No. CN216254122U, published on 2022-04-12) discloses a shrub-clearing combination knife, including a base, the base including a body, the body having a mounting hole, the body having a limiting surface on one side of the mounting hole, the knife being mounted on the body at the limiting surface through the mounting hole, the base being welded to the mounting seat of a shrub-clearing device, and then the knife being connected to the base through the mounting hole and fixed with bolts. When the knife is damaged, it can be replaced simply by removing the bolts from the mounting hole, greatly reducing the difficulty for workers to replace the knife.

[0004] Most existing shrub clearing heads use fixed blades or rollers, which cannot adapt to undulating terrain, easily scratch the ground or miss cuts, and the blades or saw blades are integral and cannot be rotated. Once the blades wear down, the entire blade is scrapped, resulting in a large consumption of blades and high overall operating costs for shrub clearing operations. Summary of the Invention

[0005] The purpose of this invention is to provide a modular shrub clearing head to solve the problems mentioned in the background art. Currently available shrub clearing heads use fixed blades or rollers, which cannot adapt to undulating terrain, easily scratch the ground or miss cuts, and the blades or saw blades are integral, the tools cannot be rotated, and the entire blade is scrapped after the edge wears out, resulting in a large consumption of tools in shrub clearing operations.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a modular shrub-cleaning head, comprising a mounting frame for connection and installation with external equipment, a contoured cover movably mounted on the outer side of the mounting frame, and a central drive shaft rotatably mounted on the inner side of the contoured cover, with cutter discs evenly mounted on the central drive shaft. The mounting frame and the contoured cover are connected by a floating suspension mechanism, which controls the contoured cover to float vertically, tilt laterally, and pitch longitudinally. Radial cutter arms are evenly arranged on the outer side of the cutter disc, and a cutter holder is inserted into the end of each cutter arm, with a cutting blade rotatably mounted on the cutter holder. The cutter arms and cutter holders are assembled and fixed by a positioning component. A counterweight centrifugal block is slidably sleeved on the outer side of the cutter arm, limiting the positioning component during the sliding process of the counterweight centrifugal block. A positioning disc is fixedly mounted on the end of the rotation shaft of the cutting blade, and the angle of the cutting blade is locked by a locking mechanism during the centrifugal sliding process of the counterweight centrifugal block.

[0007] Preferably, the floating suspension mechanism includes a lifting hydraulic cylinder fixedly installed below the mounting frame, and a lifting frame is fixedly installed at the output end of the lifting hydraulic cylinder, and a rotating frame is rotatably installed below the lifting frame, and two rotating hydraulic cylinders are symmetrically hinged between the lifting frame and the rotating frame.

[0008] Preferably, the rotating frame and the contoured shield are elastically rotatably connected, and the bottom plate of the contoured shield is made of polyurethane material. Furthermore, guide plates are evenly arranged on the bottom plate of the contoured shield, and the positions of the guide plates and the cutter head are correspondingly arranged.

[0009] Preferably, a discharge auger is rotatably provided on the inner side of the contoured cover, and the central drive shaft and the discharge auger are connected by a synchronous belt drive. A waste discharge port is provided at one end of the contoured cover, and a negative pressure pipe for extracting light debris and dust is connected to the top of the contoured cover.

[0010] Preferably, the blade arm and the blade holder are inserted into each other, and a first magnetic block is embedded in the inner wall of the insertion groove of the blade arm, and a second magnetic block is fixedly installed at one end of the blade holder located inside the blade arm. At the same time, the magnetic poles of the opposite sides of the first magnetic block and the second magnetic block are opposite.

[0011] Preferably, the positioning component includes a positioning pin slidably mounted on the cutter arm, and a spring is connected between the positioning pin and the cutter arm. The side wall of the cutter holder has a positioning hole, and the positioning pin and the positioning hole engage during the insertion of the cutter arm and the cutter holder.

[0012] Preferably, a spring connects the counterweight centrifugal block and the blade arm, and the end of the counterweight centrifugal block is fitted and attached to the positioning pin during the sliding process.

[0013] Preferably, the positioning disk has uniformly spaced limiting holes, and the tool holder is elastically slidably connected to the limiting pin by a spring. The top of the limiting pin is engaged in the limiting hole, and the top of the limiting pin has an arc surface structure.

[0014] Preferably, the locking mechanism includes a locking pin fixedly installed on the outside of the counterweight centrifugal block, and a locking hole is provided on the side of the positioning plate. During the elastic sliding of the counterweight centrifugal block, the locking pin is driven to automatically insert and lock into the locking hole.

[0015] Preferably, the cutting blade is a regular polygonal carbide blade, and the cutting blade has a TiAlN+DLC composite coating with a thickness of 3~5μm.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the modular shrub clearing head adopts a floating suspension mechanism, which can effectively adjust the height and angle to adapt to different working terrains, and the blades can be easily assembled and rotated, reducing maintenance difficulty and consumable costs, as detailed below; 1. It is equipped with an installation frame, a lifting frame, and a rotating frame. The lifting frame and the contoured cover can be raised and lowered by controlling the lifting hydraulic cylinder. The two rotating hydraulic cylinders can be independently controlled to drive the rotating frame to rotate the contoured cover laterally for cleaning. The contoured cover can be adjusted longitudinally around the rotating frame, so that the contoured cover can be adjusted at multiple angles to meet the needs of different working terrains.

[0017] 2. It is equipped with a discharge auger, a waste discharge port and a negative pressure pipe. The discharge auger can transport the cut shrub branches and leaves to one side of the conformal protective cover, and then discharge them through the waste discharge port for subsequent centralized collection and treatment. The negative pressure pipe can remove light debris and dust generated during the cutting process.

[0018] 3. Equipped with a cutter arm, cutter holder, and counterweight centrifugal block, the cutter arm and cutter holder are pre-positioned by inserting them together using a first magnetic block and a second magnetic block. The insertion and engagement of the positioning pin and the positioning hole enable effective positioning and installation of the cutter holder. When the cutter disc rotates at high speed, the counterweight centrifugal block slides along the cutter arm under centrifugal force, thus covering the outer side of the end of the positioning pin, preventing the positioning pin from moving accidentally and causing the cutter holder to loosen. At the same time, the locking pin on the outer side of the counterweight centrifugal block automatically and synchronously engages in the locking hole of the positioning disc, thereby limiting the cutting blade. When maintenance is required, the locking pin is reset, and rotating the positioning disc allows the cutting blade to be rotated. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the contour-following protective cover and the central drive shaft of the present invention; Figure 4 This is a schematic diagram of the connection structure between the contoured protective cover and the auger in this invention; Figure 5 This is a schematic diagram of the cutter head mounting structure of the present invention; Figure 6 This is a schematic diagram of the connection structure between the cutter arm and the cutter holder of the present invention; Figure 7 This is a schematic cross-sectional view of the cutter arm and cutter holder of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic diagram of the positioning pin installation structure of the present invention.

[0020] In the diagram: 1. Mounting frame; 2. Lifting hydraulic cylinder; 3. Lifting frame; 4. Rotating frame; 5. Rotating hydraulic cylinder; 6. Contouring cover; 7. Central drive shaft; 8. Cutter disc; 9. Discharge auger; 10. Waste outlet; 11. Negative pressure pipe; 12. Cutter arm; 13. Cutter holder; 14. Cutting blade; 15. First magnetic block; 16. Second magnetic block; 17. Positioning pin; 18. Positioning hole; 19. Counterweight centrifugal block; 20. Locking pin; 21. Positioning plate; 22. Limiting hole; 23. Limiting pin; 24. Locking hole. Detailed Implementation

[0021] 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.

[0022] Example 1: Existing shrub clearing heads use fixed blades or rollers, which cannot adapt to undulating terrain, easily scratching the ground or missing sections. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-4 As shown; a modular bush-cleaning head includes a mounting frame 1 for connection and installation with external equipment. A contoured cover 6 is movably mounted on the outer side of the mounting frame 1, and a central drive shaft 7 is rotatably mounted on the inner side of the contoured cover 6. Cutting discs 8 are evenly mounted on the central drive shaft 7. The mounting frame 1 and the contoured cover 6 are connected by a floating suspension mechanism, and the floating suspension mechanism controls the contoured cover 6 to float vertically, tilt laterally, and pitch longitudinally.

[0023] The floating suspension mechanism includes a lifting hydraulic cylinder 2 fixedly installed below the mounting frame 1, and a lifting frame 3 fixedly installed at the output end of the lifting hydraulic cylinder 2. A rotating frame 4 is rotatably installed below the lifting frame 3. Two rotating hydraulic cylinders 5 are symmetrically hinged between the lifting frame 3 and the rotating frame 4. The rotating frame 4 and the contoured cover 6 are elastically rotatably connected. The bottom plate of the contoured cover 6 is made of polyurethane material, and guide plates are evenly arranged on the bottom plate of the contoured cover 6. The guide plates and the cutter head 8 are positioned correspondingly. A discharge auger 9 is rotatably installed on the inner side of the contoured cover 6. The central drive shaft 7 and the discharge auger 9 are connected by a synchronous belt drive. A waste discharge port 10 is opened at one end of the contoured cover 6. A negative pressure pipe 11 for extracting light debris and dust is connected to the top of the contoured cover 6.

[0024] The lifting hydraulic cylinder 2 can drive the lifting frame 3 and the contoured cover 6 to adjust their height. The two rotating hydraulic cylinders 5 can be independently controlled to drive the rotating frame 4 to rotate the contoured cover 6 laterally for cleaning. The contoured cover 6 can be adjusted longitudinally around the rotating frame 4, allowing it to be adjusted at multiple angles to meet the needs of different working terrains. The hydraulic motor drives the central drive shaft 7 to rotate, so that the cutting blades 14 on the cutter head 8 can cut the shrubs. The auger 9 can transport the cut shrub branches and leaves to one side of the contoured cover 6 and discharge them through the waste outlet 10 for subsequent centralized collection and processing. The negative pressure pipe 11 can suck up the light debris and dust generated during the cutting process. At the same time, a coarse screen can be added at the inlet of the negative pressure pipe to intercept large particles and prevent blockage.

[0025] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing shrub-clearing heads have blades or saw blades that are integral and cannot be rotated. Once the cutting edge wears down, the entire blade becomes unusable, resulting in high blade consumption during shrub-clearing operations. To further solve this technical problem, this example discloses the following technical content: Figures 5-9 As shown; radially arranged blade arms 12 are evenly arranged on the outer side of the cutter head 8, and a blade holder 13 is inserted and installed at the end of the blade arm 12. At the same time, the insertion guide groove is designed at the corresponding position of the slot of the blade arm 12 and the blade holder 13 to avoid incorrect orientation during insertion and ensure that it can be inserted to the bottom only when the correct orientation is correct. The cutting blade 14 is rotatably installed on the blade holder 13. The blade arm 12 and the blade holder 13 are assembled and fixed by a positioning component. A counterweight centrifugal block 19 is slidably sleeved on the outer side of the blade arm 12. The counterweight centrifugal block 19 limits the positioning component during the sliding process. The end of the rotation shaft of the cutting blade 14 is fixedly installed with a positioning plate 21. During the centrifugal sliding process of the counterweight centrifugal block 19, the angle of the cutting blade 14 is locked by a locking mechanism. At the same time, a rubber dustproof ring can be set between the blade arm 12 and the counterweight centrifugal block 19 to prevent shrub debris and tree sap from easily seeping into the sliding gap and causing the centrifugal block to jam.

[0026] The blade arm 12 and the blade holder 13 are inserted into each other. A first magnetic block 15 is embedded in the inner wall of the insertion slot of the blade arm 12, and a second magnetic block 16 is fixedly installed at one end of the blade holder 13 located inside the blade arm 12. The magnetic poles of the first magnetic block 15 and the second magnetic block 16 are opposite. The positioning assembly includes a positioning pin 17 slidably mounted on the blade arm 12, and a spring connects the positioning pin 17 and the blade arm 12. A positioning hole 18 is provided on the side wall of the blade holder 13, and the positioning pin 17 engages with the positioning hole 18 during the insertion of the blade arm 12 and the blade holder 13. A spring connects the counterweight centrifugal block 19 to the blade arm 12, and the counterweight centrifugal block 19 slides and fits against the end of the positioning pin 17. The positioning disk 21 has uniformly spaced limiting holes 22, and the tool holder 13 is elastically connected to the limiting pin 23 by a spring. The top of the limiting pin 23 is engaged in the limiting hole 22, and the top of the limiting pin 23 has an arc surface structure. The locking mechanism includes a locking pin 20 fixedly installed on the outside of the counterweight centrifugal block 19, and a locking hole 24 is provided on the side of the positioning disk 21. During the elastic sliding of the counterweight centrifugal block 19, the locking pin 20 is driven to automatically insert into the locking hole 24. The insertion ends of the locking pin 20 and the locking hole 24 are both chamfered. The cutting blade 14 is a regular polygonal carbide blade, and the cutting blade 14 is coated with a TiAlN+DLC composite coating with a thickness of 3~5μm.

[0027] By inserting the blade arm 12 and the blade holder 13, the blade can be pre-positioned using the first magnetic block 15 and the second magnetic block 16. Then, the positioning pin 17 will engage with the positioning hole 18 under the action of the spring force, which can effectively position and install the blade holder 13. When the blade disc 8 rotates at high speed, the counterweight centrifugal block 19 will slide along the blade arm 12 under the action of centrifugal force, thereby covering the outer side of the end of the positioning pin 17 to prevent the positioning pin 17 from moving accidentally and causing the blade holder 13 to loosen. At the same time, the locking pin 20 on the outer side of the counterweight centrifugal block 19 will automatically and synchronously engage in the locking hole 24 of the positioning disc 21, thereby limiting the cutting blade 14. When maintenance is required, the counterweight centrifugal block 19 will drive the locking pin 20 to reset. At this time, rotating the positioning disc 21 can rotate the cutting blade 14, and the limiting pin 23 can engage in the limiting hole 22 at the corresponding position to achieve the pre-positioning of the cutting blade 14 and ensure that the cutting edge of the cutting blade 14 can face the cutting position.

[0028] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A modular bush-cleaning head, comprising a mounting bracket (1) for connection and installation with an external device, wherein a contoured guard (6) is movably mounted on the outer side of the mounting bracket (1), and a central drive shaft (7) is rotatably mounted on the inner side of the contoured guard (6), and blade discs (8) are uniformly mounted on the central drive shaft (7). Its features are, The mounting bracket (1) and the contoured cover (6) are connected by a floating suspension mechanism, and the floating suspension mechanism controls the contoured cover (6) to float vertically, tilt laterally and pitch longitudinally. Radial blades (12) are evenly arranged on the outer side of the cutter disc (8), and a blade holder (13) is inserted into the end of the blade (12). A cutting blade (14) is rotatably mounted on the blade holder (13). At the same time, the blade (12) and the blade holder (13) are assembled and fixed by a positioning component. A counterweight centrifugal block (19) is slidably sleeved on the outer side of the blade (12). The counterweight centrifugal block (19) limits the positioning component during the sliding process. A positioning disk (21) is fixedly installed at the end of the rotation shaft of the cutting blade (14), and the angle of the cutting blade (14) is locked by a locking mechanism during the centrifugal sliding process of the counterweight centrifugal block (19).

2. The modular shrub-clearing head according to claim 1, characterized in that: The floating suspension mechanism includes a lifting hydraulic cylinder (2) fixedly installed below the mounting frame (1), and a lifting frame (3) is fixedly installed at the output end of the lifting hydraulic cylinder (2), and a rotating frame (4) is rotatably installed below the lifting frame (3), and two rotating hydraulic cylinders (5) are symmetrically hinged between the lifting frame (3) and the rotating frame (4).

3. A modular shrub-clearing head according to claim 2, characterized in that: The rotating frame (4) and the contoured shield (6) are elastically rotatably connected. The bottom plate of the contoured shield (6) is made of polyurethane material, and guide plates are evenly arranged on the bottom plate of the contoured shield (6). At the same time, the positions of the guide plates and the cutter head (8) are correspondingly arranged.

4. A modular bush-clearing head according to claim 1, characterized in that: The inner side of the contoured cover (6) is rotatably equipped with a discharge auger (9), and the central drive shaft (7) and the discharge auger (9) are connected by a synchronous belt drive. A waste discharge port (10) is opened at one end of the contoured cover (6), and a negative pressure pipe (11) for extracting light debris and dust is connected to the top of the contoured cover (6).

5. A modular bush-clearing head according to claim 1, characterized in that: The blade arm (12) and the blade holder (13) are connected together, and a first magnetic block (15) is embedded in the inner wall of the insertion groove of the blade arm (12), and a second magnetic block (16) is fixedly installed at one end of the blade holder (13) located inside the blade arm (12). At the same time, the magnetic poles of the opposite sides of the first magnetic block (15) and the second magnetic block (16) are opposite.

6. A modular bush-clearing head according to claim 1, characterized in that: The positioning component includes a positioning pin (17) that is slidably mounted on the blade arm (12), and a spring is connected between the positioning pin (17) and the blade arm (12). The side wall of the blade holder (13) is provided with a positioning hole (18), and the positioning pin (17) and the positioning hole (18) engage during the insertion of the blade arm (12) and the blade holder (13).

7. A modular bush-clearing head according to claim 6, characterized in that: A spring is connected between the counterweight centrifugal block (19) and the blade arm (12), and the end of the counterweight centrifugal block (19) is fitted and attached to the positioning pin (17) during the sliding process.

8. A modular bush-clearing head according to claim 1, characterized in that: The positioning disk (21) has uniformly opened limit holes (22), and the tool holder (13) is elastically connected to the limit pin (23) by a spring. The top of the limit pin (23) is engaged in the limit hole (22), and the top of the limit pin (23) is an arc surface structure.

9. A modular bush-clearing head according to claim 1, characterized in that: The locking mechanism includes a locking pin (20) fixedly installed on the outside of the counterweight centrifugal block (19), and a locking hole (24) is provided on the side of the positioning plate (21). During the elastic sliding process of the counterweight centrifugal block (19), the locking pin (20) is driven to automatically insert into the locking hole (24).

10. A modular bush-clearing head according to claim 1, characterized in that: The cutting blade (14) is a regular polygonal carbide blade, and the cutting blade (14) is coated with a TiAlN+DLC composite coating with a thickness of 3~5μm.

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