Brush cutter convenient to maintain

Abstract

The utility model discloses a brush cutter convenient to maintain, and relates to the field of brush cutters, the brush cutter comprises an engine body and a rotating head, one end of the engine body is provided with a main body frame, the outer side of the main body frame is provided with a handrail frame, one end of the main body frame is provided with a machine head, and the other end of the main body frame is provided with a handle. A rotating pivot shaft is vertically arranged in the middle of the inner side of the machine head, the lower end of the outer side of the rotating pivot shaft is sleeved with a bearing head, embedding grooves are formed in the lower ends of the two sides of the rotating pivot shaft, a rotating head is arranged at the bottom end of the rotating pivot shaft, an inner screw opening is formed in the rotating head, and a mowing rope is arranged in the middle of the inner side of the rotating head in a penetrating mode. According to the brush cutter convenient to maintain, one protruding part of the herringbone shifting piece leaves the caulking groove, the other protruding part of the herringbone shifting piece does not press the outer portion of the mowing rope any more, and therefore the step that a user replaces and maintains the rotating head and the rotating pivot shaft is simplified.

Description

Technical Field

[0001] This utility model relates to the field of brush cutter technology, specifically a brush cutter that is easy to maintain. Background Technology

[0002] A brush cutter is a multi-functional piece of machinery primarily used for landscaping maintenance, clearing shrubs from forests, or tending large green belts along roadsides. It is characterized by its small size, light weight, and ease of operation, making it suitable for various environments such as home gardens, fields, and mountains. Brush cutters can be powered by electricity or internal combustion engines, with internal combustion engines further divided into two-stroke and four-stroke gasoline engines. Depending on the transmission method, brush cutters can be categorized as either flexible shaft driven or straight rod driven. Furthermore, brush cutters come in two types of working heads: blades and nylon heads, suitable for different working environments. Brush cutters have a wide range of applications, not limited to landscaping, but also including yard maintenance, road clearing, forest fire prevention, and crop harvesting. Many brands and models of brush cutters are available, such as Husqvarna and STIHL, offering various types of brush cutters, including professional-grade equipment, suitable for different work needs and occasions.

[0003] Publication number CN219679255U discloses a brush cutter that is easy to maintain. It includes: a base, a motor fixedly mounted on the top of the base, a first gear connected via a keyway at the output shaft of the motor, a second gear meshing with the outside of the first gear, the bottom end of the second gear penetrating the base and extending to the outside, and a cutting blade connected via a keyway at the bottom end of the second gear; a protective shell fixedly mounted on the top of the base and outside the motor, and a hinged flip cover mounted on the top of the protective shell. This brush cutter, provided by this utility model, uses the rotation of the motor to drive the first gear to rotate, which in turn drives the second gear to rotate, and the second gear to rotate the cutting blade, thereby effectively cutting the grass. The protective shell effectively protects the motor and other parts, preventing damage from external forces.

[0004] The above technology utilizes a protective shell to effectively protect parts such as the motor and prevent damage from external forces. However, the main component of the brush cutter is the cutting rope, which is prone to jamming and other problems when running at high speeds, making it difficult to repair.

[0005] Therefore, in view of this, we have studied and improved the existing shortcomings and proposed a brush cutter that is easy to maintain. Utility Model Content

[0006] The purpose of this invention is to provide a brush cutter that is easy to maintain, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a brush cutter that is easy to maintain, comprising: an engine body and a rotating head; a main frame is provided at one end of the engine body; a handrail is provided on the outer side of the main frame; a machine head is provided at one end of the main frame; a rotating pivot is vertically provided in the middle of the inner side of the machine head; a receiving joint is sleeved on the lower end of the outer side of the rotating pivot; grooves are provided at the lower ends of both sides of the rotating pivot; a rotating head is provided at the bottom end of the rotating pivot; an internal thread is provided inside the rotating head; a cutting rope is passed through the middle of the inner side of the rotating head; a flange is provided on both sides of the rotating head; a shaft groove is provided on both sides of the top of the rotating head; arc grooves are provided at both ends inside the shaft groove; a rotating rod is provided in the middle of the inner side of the shaft groove; and a herringbone pawl is provided on the outer side of the rotating rod.

[0008] A rope groove is provided laterally in the middle of the inside of the rotating head, and an auxiliary mechanism is provided on the outside of the rotating pivot.

[0009] Furthermore, the cross-sectional area of ​​the arc groove is larger than that of the rotating rod, which facilitates the installation of the rotating rod.

[0010] Furthermore, the rotating rod and the herringbone paddle form a rotating structure, which facilitates the rotation of the herringbone paddle.

[0011] Furthermore, the width of the herringbone paddle is equal to the width of the inner side of the groove, so that one end of the herringbone paddle can be inserted into the inside of the groove.

[0012] Furthermore, the auxiliary mechanism includes a screw head, a through groove, a retaining ring, a first connecting rod, a second connecting rod, a positioning washer, and an insert. A through groove is annularly formed at the middle of the outer side of the pivot. An insert is engaged with the inner side of the through groove. A second connecting rod is provided at the bottom of the back of the insert. A positioning washer is provided at one end of the second connecting rod. A first connecting rod is provided at the upper end of the front of the insert. A retaining ring is provided at the top of the first connecting rod. The through groove and the insert are engaged to facilitate the loading and unloading of the insert.

[0013] Furthermore, the volume of the space formed between the positioning washer and the second connecting rod is slightly smaller than the volume of the screw head, so that the screw head will not wobble after entering the space formed between the second connecting rod and the positioning washer.

[0014] Furthermore, the outer side of the screw head is provided with a threaded structure, and the upper end of the inner side of the pivot is provided with a threaded structure. The threaded structure of the screw head matches the threaded structure of the pivot, which facilitates the connection between the screw head and the pivot.

[0015] Furthermore, the clasp is fixedly connected to the first connecting rod to prevent the clasp from falling off. Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, by turning the herringbone paddle, causes the inner lever of the herringbone paddle to rotate within the shaft groove and arc groove. The protruding part of the herringbone paddle moves up and down within the width of the spoke. The protruding part of the herringbone paddle presses down on the cutting rope inside the head, while the other protruding part of the herringbone paddle engages with the grooves on both sides of the pivot. At this point, the head and the pivot are connected. This design ensures that when the user replaces or maintains the cutting rope, the cutting rope will not easily fall out after entering the head, and will not cause trouble for the user. When it is necessary to disassemble or repair the head or the pivot, it is only necessary to turn the herringbone paddle in the opposite direction again, so that one protruding part of the herringbone paddle leaves the groove and the other protruding part of the herringbone paddle no longer presses down on the outside of the cutting rope. This simplifies the steps for the user to replace and repair the head and the pivot.

[0017] 2. In this invention, the screw head is screwed into the interior of the pivot shaft. Since the insert places the positioning washer and the second connecting rod at the bottom of the pivot shaft, when the bottom of the screw head and the top of the positioning washer are in contact with each other, the position of the retaining ring, the second connecting rod, and the insert will be fixed on the outside of the pivot shaft. In this way, when the user encounters a large-sized shaft part during installation, the retaining ring can increase the contact area between the pivot shaft and the large-sized shaft part. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first appearance structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the second appearance structure of the present utility model;

[0020] Figure 3 This is a schematic diagram of the first rotating head part of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the second rotating head of this utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the first rotating head of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the second rotating head of this utility model;

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the third rotating head of this utility model;

[0025] Figure 8 This is a schematic diagram of the first auxiliary structure of this utility model;

[0026] Figure 9 This is a schematic diagram of the second auxiliary structure of this utility model.

[0027] In the diagram: 1. Engine body; 2. Main frame; 3. Rotary head; 4. Grass cutting rope; 5. Engine head; 6. Connector; 7. Handrail frame; 8. Groove; 9. Rotary pivot; 10. Auxiliary mechanism; 101. Screw head; 102. Through groove; 103. Encasing ring; 104. First connecting rod; 105. Second connecting rod; 106. Gathering washer; 107. Insert; 11. Internal thread; 12. Rope groove; 13. Shaft groove; 14. Herringbone lever; 15. Rotary rod; 16. Arc groove; 17. Width. 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] like Figures 1-9 As shown, a brush cutter that is easy to maintain includes: an engine body 1 and a rotating head 3. A main frame 2 is provided at one end of the engine body 1, and a handrail 7 is provided on the outside of the main frame 2. A machine head 5 is provided at one end of the main frame 2. A rotating pivot 9 is vertically provided in the middle of the inner side of the machine head 5. A receiving joint 6 is sleeved on the lower end of the outer side of the rotating pivot 9. A groove 8 is provided at the lower ends of both sides of the rotating pivot 9. A rotating head 3 is provided at the bottom end of the rotating pivot 9. An internal thread 11 is provided inside the rotating head 3. A cutting rope 4 is passed through the middle of the inner side of the rotating head 3. A width opening 17 is provided on both sides of the rotating head 3. A shaft groove 13 is provided on both sides of the top of the rotating head 3. An arc groove 16 is provided at both ends inside the shaft groove 13. A rotating rod 15 is provided in the middle of the inner side of the shaft groove 13. A herringbone pawl 14 is provided on the outside of the rotating rod 15.

[0030] A rope groove 12 is horizontally arranged in the middle of the inside of the rotating head 3, and an auxiliary mechanism 10 is arranged on the outside of the rotating pivot 9.

[0031] The remaining features are provided by the shaft groove 13, arc groove 16, and width opening 17 inside the rotating head 3, which provide space for the rotating rod 15 and the herringbone paddle 14 to move. When the herringbone paddle 14 is turned, its two ends are respectively engaged in the groove 8 on the outside of the pivot 9 and pressed against the top of the mowing rope 4. This achieves the two purposes of connecting the pivot 9 and the rotating head 3 and fixing the mowing rope 4 and the rotating head 3. The designer can expand or shrink the included angle on the inside of the herringbone paddle 14 to adapt to different models of rotating head 3 and pivot 9.

[0032] This has resulted in the following effects and novel technologies:

[0033] This utility model provides a brush cutter that is easy to maintain. Its design cleverly utilizes the structure of the shaft groove 13, arc groove 16, width opening 17, and herringbone paddle 14 inside the rotating head 3 to achieve quick connection and fixation between the rotating head 3 and the rotating pivot 9, while ensuring the stability of the cutting rope 4 and the convenience of maintenance. The novel technology is reflected in the following aspects: quick connection and fixation, by moving the herringbone lever 14, its two ends respectively engage with the grooves 8 on the outside of the pivot 9 and press down the top of the mowing rope 4, simplifying the operation steps; easy maintenance, the mowing rope 4 will not easily fall off after entering the inside of the head 3, and the design of the herringbone lever 14 allows for quick disassembly of the head 3 or the pivot 9; adaptable design, the included angle on the inside of the herringbone lever 14 can be expanded or reduced to adapt to different models of head 3 and pivot 9, improving the versatility of the equipment; rotating structure, the rotating structure between the lever 15 and the herringbone lever 14 allows the herringbone lever 14 to rotate, simplifying the operation; precise matching, the width of the herringbone lever 14 is equal to the width of the inside of the groove 8, ensuring precise embedding. This utility model, through its unique structural design, improves the maintenance convenience and operating efficiency of the brush cutter, while ensuring the safety and stability of the equipment, and is suitable for garden maintenance work that requires frequent replacement and maintenance.

[0034] like Figures 1-9 As shown, a brush cutter that is easy to maintain includes an auxiliary mechanism 10 comprising a screw head 101, a through groove 102, a retaining ring 103, a first connecting rod 104, a second connecting rod 105, a retaining washer 106, and an insert 107. A through groove 102 is annularly formed at the middle of the outer side of the pivot 9. An insert 107 is engaged with the inner side of the through groove 102. The second connecting rod 105 is located at the bottom of the back of the insert 107, and a retaining washer 106 is located at one end of the second connecting rod 105. The first connecting rod 104 is located at the upper end of the front of the insert 107, and a retaining ring 103 is located at the top of the first connecting rod 104. The through groove 102 and the insert 107 are engaged.

[0035] As the retaining ring 103 is pulled upward, it causes the first connecting rod 104, insert 107, second connecting rod 105, and retaining washer 106 to move inside and outside the pivot 9. At the same time, after the screw head 101 is screwed into the pivot 9, the bottom end of the screw head 101 fills the space between the retaining washer 106 and the second connecting rod 105. This allows the retaining ring 103 to contact the larger shaft-type bearing component instead of the pivot 9. The designer can increase the length of the first connecting rod 104 to increase the height of the retaining ring 103. The designer can also reduce the length of the second connecting rod 105 to increase the fit between the screw head 101 and the retaining washer 106.

[0036] This has resulted in the following effects and novel technologies:

[0037] The brush cutter provided by this utility model, which is easy to maintain, has an auxiliary mechanism 10 including a screw head 101, a through groove 102, a retaining ring 103, a first connecting rod 104, a second connecting rod 105, a retaining washer 106, and an insert 107. The design of these components enables flexible adjustment and fixation of the pivot 9, resulting in an increased contact area. By pulling the retaining ring 103 upwards, the relevant components move inside and outside the pivot 9. After the screw head 101 is screwed into the pivot 9, its bottom end fills the space between the retaining washer 106 and the second connecting rod 105, allowing the retaining ring 103 to replace the larger shaft-like bearing component of the pivot 9, thereby expanding the contact area. Simultaneously, the designer can increase the contact area by adding a first connecting rod 104. The length of rod 104 is adapted to accommodate larger shaft parts, and the length of the second connecting rod 105 is reduced to improve the stability of the fixation. In addition, the insert 107 places the positioning washer 106 and the second connecting rod 105 at the bottom inside the pivot 9. When the screw head 101 and the positioning washer 106 are in contact with each other, the positions of the retaining ring 103, the second connecting rod 105, and the insert 107 are fixed, simplifying the installation process. Especially when dealing with large shaft parts, this utility model improves the convenience of brush cutter maintenance and installation through the design of its auxiliary structure 10, enhances the adaptability of the equipment to shaft parts of different sizes, and ensures the stability of the fixation, providing novel technical support for the use and maintenance of brush cutters.

[0038] Working Principle: When using this easy-to-maintain brush cutter, the user first starts the engine body 1. The engine body 1 drives the pivot 9 inside the head 5 to rotate, which in turn drives the head 3 to rotate. The head 3 then drives the cutting rope 4 to rotate at high speed. At this time, the cutting rope 4 removes grass from the target area. If the cutting rope 4 breaks or gets stuck, the head 3 stops rotating. Then, the user presses the herringbone lever 14. The rotating rod 15, which is horizontally arranged inside the herringbone lever 14, rotates inside the arc groove 16 inside the shaft groove 13. After one end of the herringbone lever 14 disengages from the groove 8, the other end of the herringbone lever 14 no longer presses against the outside of the herringbone lever 14. At this point, the user can replace the herringbone paddle 14. When the installation of the pivot 9 encounters a large shaft-type receiving component, the user shakes the retaining ring 103 upwards. The first connecting rod 104 at the bottom of the retaining ring 103 causes the insert 107 to shake, and the insert 107 disengages from the through groove 102 on the outside of the pivot 9. Then, the screw head 101 is screwed into the interior of the pivot 9, so that the bottom of the screw head 101 abuts against the space formed between the positioning washer 106 and the second connecting rod 105. At this time, the retaining ring 103 is placed on the top of the pivot 9, and the user can connect to the large shaft-type receiving component through the retaining ring 103. This is the working principle of this brush cutter that is easy to maintain.

[0039] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A brush cutter that facilitates maintenance, comprising: The engine body (1) is provided with a main body frame (2) at one end, a handrail frame (7) is arranged on the outer side of the main body frame (2), a machine head (5) is arranged at one end of the main body frame (2), a rotating pivot shaft (9) is vertically arranged at the middle of the inner side of the machine head (5), a receiving head (6) is sleeved at the lower end of the outer side of the rotating pivot shaft (9), an embedding groove (8) is arranged at the lower end of the two sides of the rotating pivot shaft (9), a rotating head (3) is arranged at the bottom end of the rotating pivot shaft (9), an inner screw port (11) is arranged in the rotating head (3), a grass cutting rope (4) is arranged through the middle of the inner side of the rotating head (3), a width port (17) is arranged at the two sides of the rotating head (3), an axle groove (13) is arranged at the two sides of the top end of the rotating head (3), an arc groove (16) is arranged at the two ends of the inner side of the axle groove (13), and a rotating rod (15) is arranged at the middle of the inner side of the axle groove (13). An auxiliary mechanism (10) is arranged on the outer side of the rotating pivot shaft (9).

2. A brush cutter according to claim 1, wherein The cross-sectional area of the arc groove (16) is greater than that of the rotating rod (15).

3. A brush cutter according to claim 1, wherein The rotating rod (15) and the herringbone turning piece (14) form a rotating structure.

4. A brush cutter according to claim 1, wherein The width of the herringbone turning piece (14) is equal to the width of the inner side of the embedding groove (8).

5. A brush cutter according to claim 1, wherein The auxiliary mechanism (10) comprises a screw head (101), a through groove (102), a cover ring (103), a first connecting rod (104), a second connecting rod (105), a gathering position gasket (106), and an embedding block (107), the through groove (102) is annularly arranged at the middle of the outer side of the rotating pivot shaft (9), the embedding block (107) is clamped on the inner side of the through groove (102), the second connecting rod (105) is arranged at the bottom end of the back of the embedding block (107), the gathering position gasket (106) is arranged at one end of the second connecting rod (105), the first connecting rod (104) is arranged at the upper end of the front of the embedding block (107), the cover ring (103) is arranged at the top end of the first connecting rod (104), and the through groove (102) and the embedding block (107) are clampedly connected.

6. A brush cutter according to claim 5, wherein The space volume formed between the gathering position gasket (106) and the second connecting rod (105) is slightly smaller than the volume of the screw head (101).

7. A brush cutter according to claim 5 wherein, The outer side of the screw head (101) is provided with a threaded structure, the upper end of the inner side of the rotating pivot shaft (9) is provided with a threaded structure, and the threaded structure of the screw head (101) is matched with the threaded structure of the rotating pivot shaft (9).

8. A brush cutter according to claim 5, wherein The cover ring (103) and the first connecting rod (104) are fixedly connected.

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