Grass trimming head for grass trimmer

Abstract

The utility model relates to a grass trimming head for a grass trimmer, and belongs to the technical field of agricultural instruments. The grass mowing head comprises a base, an upper cover, a grass mowing rope barrel, an aluminum piece nut, a rope outlet mechanism, a top cover and the like. A base connecting piece is arranged in the base, an aluminum nut is installed in the connecting piece, a gear block is arranged on the outer side wall of the aluminum nut, and a threaded groove is formed in the middle and used for being connected with a grass trimmer working head. The base connecting piece is sleeved with the grass mowing rope barrel, and a grass mowing rope is wound inside the grass mowing rope barrel and smoothly stretches out through the arc-shaped rope outlet face. The rope outlet mechanism is designed into an arc-shaped surface and is provided with a positioning groove, so that abrasion and vibration of the rope are effectively reduced. The top cover and the insert are connected to the upper portion of the grass trimming rope barrel, and abrasion resistance is enhanced. The base and the upper cover are fixed through the buckling piece, the structure is stable, and disassembly and assembly are easy. By optimizing the rope outlet mechanism, improving the aluminum piece nut design and adding the wear-resistant insert, the problems that a traditional grass trimming head is unsmooth in rope unwinding, prone to abrasion, low in coaxiality and the like are solved, the service life of the grass trimming head is remarkably prolonged, rope unwinding smoothness and adaptability are remarkably improved, and the grass trimming head is suitable for grass trimmers of various models.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grass head for grass beater belongs to agricultural implement technical field. BACKGROUND

[0002] As a kind of mechanical equipment widely used in agriculture, garden and other fields, the performance of the core component grass head of grass beater directly influences work efficiency and service life.There are some technical defects in the design of existing grass head, which leads to poor performance in actual use.Firstly, the rope outlet aluminum piece of traditional grass head usually adopts the design of straight face and small round corner, this structure is prone to make grass rope produce angle when high-speed rotating, leading to inharmonious release of grass rope, even the phenomenon of rope breakage, seriously affect work efficiency.Secondly, the nut on base is embedded in base injection molding after iron bar processing, this manufacturing method not only can not guarantee coaxiality, leading to grass head being easy to rotate when working, but also cost is higher, commonality is poor, difficult to adapt to grass beater of different models.In addition, upper cover part is prone to wear due to long-term friction with ground and grass rope, service life is shorter, increase the maintenance cost and replacement frequency of user.These problems not only reduce the overall performance of grass beater, but also increase the use burden of user.Therefore, a new type of grass head design is needed to solve the deficiencies in prior art, improve the durability, release smoothness and adaptability of grass beater, to meet the actual needs of user. SUMMARY

[0003] The utility model solves technical problem, provide a kind of grass head for grass beater, the grass head wear resistance is good, service life is long, easy to disassemble, and adaptability is high.

[0004] The utility model discloses a kind of grass head for grass beater, including base, the upper part of the base is connected with upper cover, the cavity formed by the base and the upper cover has grass rope cylinder, it is characterized in that, base connector is equipped in the base, recess is opened in the base connector, aluminum nut is connected in the recess, the outer side wall of the aluminum nut is gear block, the middle part of the aluminum nut is opened with the thread groove that penetrates up and down, the grass rope cylinder is sleeved on the outer side of the base connector, there is grass rope in the grass rope cylinder, the left and right sides of the base are each connected with one rope outlet mechanism, the inner side of the rope outlet mechanism is rope outlet face, the upper part of the grass rope cylinder is connected with top cover, the upper part of the top cover is connected with insert piece, the top cover passes through the upper cover.

[0005] The rope outlet face is arc face, and positioning groove is opened on the rope outlet face.

[0006] The side wall of the base is connected with buckle piece, the inner side of the upper cover is opened with the clamping groove corresponding with the buckle piece, and the base and the upper cover are fixed by the buckle piece.

[0007] The gear block and the groove are matched in shape.

[0008] The insert is embedded in the top cover.

[0009] The grass rope is spirally wound in the grass rope cylinder.

[0010] The grass rope passes through the rope outlet mechanism and is in contact with the rope outlet surface.

[0011] The grass rope swings within 0-140 degrees.

[0012] The thread groove is connected to the grass trimmer working head.

[0013] The utility model discloses the beneficial effect is:

[0014] The existing grass head has the following shortcomings:

[0015] 1, the utility model discloses a grass head rope of grass trimmer is automatically put out, because grass head high -speed rotation, the traditional five gold inserts of not doing are easy to wear and tear, now increase five gold inserts and have done the radian, reduce the contact with the ground when high -speed rotation knock and put the rope, and five gold spare wear -resisting, greatly improve the service life of grass head.

[0016] 2, the utility model discloses a grass head of grass trimmer carries out the innovative design to the rope outlet mechanism, changes the rope outlet surface to arc structure, makes grass rope when working and the rope outlet surface basically keep tangency state, reduced the friction of rope and the rope outlet surface, avoided the problem of rope corner or fracture. Meanwhile, the positioning groove on the rope outlet surface can effectively position grass rope, prevent it from in the working process up and down disorderly fling, reduce vibration, ensure that the process of putting the rope is more smooth, further prolong the service life of grass rope.

[0017] 3, the utility model discloses a grass head of grass trimmer adopts the aluminum nut of extrusion process manufacture, and its tooth shape structure and base recess precision cooperation, effectively prevent grass head when working and turn. In addition, the cylindrical step of nut and screw thread are completed through once clamping processing, ensure high coaxiality, and the interference fit of nut and base further improves the coaxial precision. The design of aluminum nut also supports quick disassembly and assembly, and users can replace the nut according to the need, adapts to different models of grass trimmer, significantly improves the versatility and flexibility of product.

[0018] 4, the utility model discloses a grass head of grass trimmer through the cooperation of buckle and card slot, realizes the quick fixing of base and upper cover, not only simplifies the disassembly and assembly process, but also enhances the stability of overall structure. In addition, the grass rope is spirally wound in the grass rope cylinder, and cooperates with the arc design of the rope outlet mechanism, further reduces the wear and vibration of the rope in the work, reduces the maintenance frequency and cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic view of the grass hitting head of the grass hitting machine.

[0020] Figure 2 It is a front view sectional structure schematic view of the grass hitting head of the grass hitting machine.

[0021] Figure 3 It is an internal explosion structure schematic view of the grass hitting head of the grass hitting machine.

[0022] Figure 4 It is a three-dimensional structure schematic view of the insert of the grass hitting head of the grass hitting machine.

[0023] Figure 5 It is a three-dimensional structure schematic view of the rope outlet mechanism of the grass hitting head of the grass hitting machine.

[0024] Figure 6 It is a use schematic view of the grass hitting head of the grass hitting machine.

[0025] In the figure: 100 is a base, 101 is a base connecting piece, 102 is a groove, 103 is, 200 is an upper cover, 300 is a grass rope drum, 301 is a grass rope, 400 is an aluminum nut, 401 is a gear block, 402 is a threaded groove, 500 is a rope outlet mechanism, 501 is a rope outlet surface, 502 is a positioning groove, 600 is a top cover, and 601 is an insert. DETAILED DESCRIPTION

[0026] The utility model is further explained below, but the utility model protection scope is not limited to the content. Figures 1-6 The utility model is further explained below, but the utility model protection scope is not limited to the content.

[0027] 1, whole structure explanation

[0028] The grass hitting head of the grass hitting machine provided by the utility model mainly includes base 100, upper cover 200, grass rope drum 300, aluminum nut 400, rope outlet mechanism 500, top cover 600 and insert 601 and the like. Base 100 and upper cover 200 are fixed through buckle pieces, form a cavity, and grass rope drum 300 and aluminum nut 400 are installed inside. Grass rope 301 is wound in grass rope drum 300, and the grass rope is stretched out through rope outlet mechanism 500, top cover 600 and insert 601 are connected on the upper portion of grass rope drum 300, and play the protection and positioning role.

[0029] 2, the connection of base and aluminum nut

[0030] The base 100 is provided with a base connector 101, and a groove 102 is formed in the connector. The aluminum nut 400 is made by extrusion process, and the outer wall thereof is designed as a gear block 401 which is matched with the shape of the groove 102, so that the aluminum nut 400 can be stably installed in the base connector 101. A threaded groove 402 is formed in the middle of the aluminum nut 400 and penetrates the aluminum nut 400 upward and downward, and is used for connecting the working head of the grass trimmer. By one-time clamping processing, the cylindrical step of the aluminum nut 400 and the threaded groove 402 ensure high coaxiality, and the cylindrical step and the base hole are in interference fit, which further improves the coaxiality precision.

[0031] 3. Installation of the grass trimmer string cylinder and the grass trimmer string

[0032] The grass trimmer string cylinder 300 is sleeved outside the base connector 101, and the grass trimmer string 301 is wound in the inside of the grass trimmer string cylinder 300. The grass trimmer string 301 is wound in a spiral shape, so that the grass trimmer string 301 can be smoothly released when the grass trimmer string 301 is released. After the grass trimmer string 301 is led out from the grass trimmer string cylinder 300, the grass trimmer string 301 passes through the string releasing mechanism 500 and contacts the string releasing surface 501. The string releasing surface 501 is designed as an arc surface, and a positioning groove 502 is formed on the surface of the string releasing surface 501, which is used for guiding and positioning the grass trimmer string 301, preventing the grass trimmer string 301 from swinging up and down in the working process, and reducing vibration.

[0033] 4. Design of the string releasing mechanism

[0034] The string releasing mechanism 500 is located on the left and right sides of the base 100, and the inner side thereof is an arc-shaped string releasing surface 501. The arc-shaped design makes the grass trimmer string 301 keep tangent to the string releasing surface 501 in the working process, reduces the friction between the grass trimmer string 301 and the string releasing surface 501, and avoids the problems of the grass trimmer string 301 being folded or broken. The positioning groove 502 further limits the movement range of the grass trimmer string 301, so that the grass trimmer string 301 swings in the range of 0-140°, and the stability and efficiency of the working process are improved.

[0035] 5. Installation of the top cover and the insert

[0036] The top cover 600 is connected to the upper part of the grass trimmer string cylinder 300 and is fixed by the insert 601. The insert 601 is embedded in the top cover 600 and plays a role in enhancing wear resistance and protection. The top cover 600 passes through the upper cover 200 and forms a complete grass trimmer head structure together with the base 100 and the upper cover 200.

[0037] 6. Fixing of the base and the upper cover

[0038] The base 100 is connected with a buckle, and the inner side of the upper cover 200 is provided with a clamping groove corresponding to the buckle. Through the cooperation of the buckle and the clamping groove, the base 100 and the upper cover 200 can be quickly fixed, which simplifies the disassembly and assembly process and enhances the stability of the overall structure.

[0039] 7. Use method

[0040] The grass head is installed on the working head of the grass trimmer through the threaded groove 402 of the aluminum nut 400. After starting the grass trimmer, the grass head rotates at high speed, the grass string 301 is automatically released from the grass string cylinder 300, and smoothly extends through the arc-shaped string outlet surface 501 of the string outlet mechanism 500. During operation, the grass string 301 maintains a tangent state with the string outlet surface 501, reducing friction and vibration, and prolonging the service life of the grass string. When the grass string 301 is worn or needs to be replaced, the user can easily disassemble the top cover 600 and the upper cover 200, and replace the new grass string 301.

[0041] 8. Replacement of aluminum nut

[0042] The aluminum nut 400 adopts an easy-to-disassemble design, and users can replace nuts of different specifications as needed to adapt to other models of grass trimmers. When replacing, only the base 100 and the upper cover 200 need to be disassembled, the original aluminum nut 400 is removed, and a new nut is installed.

[0043] The utility model discloses a design of optimizing base, string outlet mechanism, aluminum nut and top cover and other components, solves the problems of traditional grass head, such as poor string release, easy wear and low coaxiality, significantly improves the durability, string release smoothness and adaptability of the grass head. The specific implementation method is simple and easy to operate and maintain, and has a wide application prospect.

[0044] Although the technical scheme of the utility model has been described and listed in detail, it should be understood that for those skilled in the art, modifications or equivalent alternatives can be made to the above embodiments, which is obvious to those skilled in the art, and these modifications or improvements made on the basis of not deviating from the spirit of the utility model, all belong to the scope of protection required by the utility model.

Claims

1. A grass hitting head for a grass trimmer, comprising a base (100), an upper cover (200) connected to an upper portion of the base (100), and a grass hitting string cylinder (300) in a cavity formed by the base (100) and the upper cover (200), characterized in that, The base (100) is internally provided with a base connecting piece (101), the base connecting piece (101) is internally provided with a groove (102), the groove (102) is internally connected with an aluminum nut (400), the outer side wall of the aluminum nut (400) is a gear block (401), the middle part of the aluminum nut (400) is internally provided with an up-down penetrating thread groove (402), the grass rope winding drum (300) is sleeved outside the base connecting piece (101), the grass rope winding drum (300) is internally provided with a grass rope (301), the left and right sides of the base (100) are each connected with an out-roping mechanism (500), the inner side of the out-roping mechanism (500) is an out-roping surface (501), the upper part of the grass rope winding drum (300) is connected with a top cover (600), the upper part of the top cover (600) is connected with an inlay piece (601), the top cover (600) penetrates through the upper cover (200).

2. A beater head for a beater as claimed in claim 1, wherein The out-roping surface (501) is an arc surface, the out-roping surface (501) is internally provided with a positioning groove (502).

3. The brush head of claim 1, wherein, The side wall of the base (100) is connected with a buckle piece (103), the inner side of the upper cover (200) is internally provided with a clamping groove corresponding to the buckle piece (103), and the base (100) and the upper cover (200) are fixed by the buckle piece (103).

4. The brush head of claim 1 wherein, The gear block (401) and the groove (102) are matched in shape.

5. The brush head of claim 1 wherein, The inlay piece (601) is embedded in the top cover (600).

6. The brush head of claim 1, wherein, The grass rope (301) is spirally wound in the grass rope winding drum (300).

7. The brush head of claim 1 wherein, The grass rope (301) penetrates through the out-roping mechanism (500), and the grass rope (301) is in contact with the out-roping surface (501).

8. The brush head of claim 1, wherein, The grass rope (301) swings within 0-140°.

9. The brush head of claim 1, wherein, The thread groove (402) is connected to the working head of the grass trimmer.

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