A half-edge type grass cutting blade and a grass cutting device

Abstract

The utility model relates to a kind of half blade edge formula grass cutting blade and grass cutting device, grass cutting blade is strip-shaped plate, including blade body, it has the first end edge and the second end edge of each other, and the first side edge and the second side edge;The blade body has blade main axis, cutting edge is equipped on the blade body, the cutting edge is located on the first side edge;Weight reduction portion is equipped on the blade body, the weight reduction portion is located on the second side edge, and it is oppositely arranged with the cutting edge, the gravity center of the weight reduction portion and cutting edge is located on blade main axis;Fused layer is equipped on the working surface of the cutting edge, the fused layer includes fused layer body, and arc-shaped heap covering layer at the intersection of the working surface of cutting edge and first end edge;The utility model grass cutting blade designs unilateral cutting edge concentrated cutting performance, with wear-resistant fused layer, significantly improve wear resistance, extend blade edge service life, and the cutting stability of grass cutting device is good.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, and in particular relates to a semi-bladed grass cutting blade and grass cutting device. Background Technology

[0002] To improve the utilization rate of wheat and rice straw, straw-cutting devices are installed on combine harvesters to achieve straw crushing and returning to the field.

[0003] However, existing straw-returning and straw-cutting devices have the following shortcomings in actual use: 1. Most straw-cutting blades do not adopt local wear-resistant reinforcement design, and the cutting edge is easily worn and dulled due to long-term contact with hard impurities, requiring frequent blade replacement; 2. During use, the cutting edge and end of existing straw-cutting blades are easily curled and deformed by force, which cannot guarantee the continuity of straw cutting; 3. Existing straw-cutting blades do not consider the issue of center of gravity symmetry, resulting in a shift in the center of gravity of the straw-cutting blade, which generates periodic centrifugal force when the blade rotates at high speed, causing the equipment body to shake, affecting the cutting effect, and at the same time aggravating the wear of the straw-cutting blade; those skilled in the art urgently need to solve the above technical problems. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a semi-edge grass-cutting blade and a grass-cutting device. The grass-cutting blade is designed with a single-sided cutting edge to concentrate cutting performance, and is equipped with a wear-resistant cladding layer, which significantly improves wear resistance and extends the service life of the blade. The grass-cutting device has good cutting stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A semi-bladed grass-cutting blade is a long strip-shaped plate, including a blade body having a first end edge and a second end edge opposite to each other, and a first side edge and a second side edge; The blade body has a blade main axis. in, A cutting edge is provided on the blade body, and the cutting edge is located on the first side edge; A weight-reducing section is provided on the blade body. The weight-reducing section is located on the second side edge and is arranged opposite to the cutting edge. The center of gravity of the weight-reducing section and the cutting edge is located on the main axis of the blade. A cladding layer is provided on the working surface of the cutting edge. The cladding layer includes a cladding layer body coated on the working surface of the cutting edge and an arc-shaped overlay layer formed at the intersection of the working surface of the cutting edge and the first end edge.

[0006] In a preferred embodiment of the present invention, the cutting edge is further provided with a non-working surface, which is symmetrical to the working surface with respect to the center of the blade body and is arranged in a wedge shape.

[0007] In a preferred embodiment of the present invention, the length of the cutting edge is set to 2 / 3 of the length of the first side edge.

[0008] In a preferred embodiment of the present invention, a mounting hole is provided on the blade body, the mounting hole being opened on the main axis of the blade and arranged near the edge of the second end.

[0009] In a preferred embodiment of this utility model, the blade body is made of 65 manganese material, wherein the cutting edge is subjected to high-temperature quenching.

[0010] In a preferred embodiment of this utility model, the thickness of the cladding layer body is 0.2-0.3 mm.

[0011] A grass-cutting device includes a grass-cutting blade as described above, which has a main shaft, and a plurality of outwardly extending blade sleeves are distributed in a ring on the circumferential surface of the main shaft. The blade sleeves are perpendicular to the circumferential surface of the main shaft, and the grass-cutting blade is inserted into the blade sleeve. The grass-cutting blade is fixed in the blade sleeve by a fixing bolt that passes through the mounting hole on the blade sleeve and the grass-cutting blade.

[0012] In a preferred embodiment of this utility model, the contact end between the tool sleeve and the spindle is arc-shaped and welded to the spindle.

[0013] In a preferred embodiment of the present invention, the blade body is sleeved inside the blade sleeve, and the portion of the blade body extending out of the blade sleeve is configured as a cutting edge. Beneficial effects

[0014] This utility model discloses a semi-blade grass cutter blade, which is designed with a single-sided cutting edge to concentrate cutting performance. It is equipped with a wear-resistant cladding layer, which not only ensures the sharpness of the blade edge to quickly cut straw, but also significantly improves wear resistance and extends the service life of the blade edge. The arc-shaped overlay layer formed at the intersection of the working surface of the cutting edge and the first end edge can buffer the direct impact of hard impurities, enhance the structural strength of the cutting edge, prevent the cutting edge from curling or deforming under force, and ensure the continuity of cutting. The weight-reducing part on the second side edge is arranged opposite to the cutting edge, and works with the mounting hole on the main axis of the blade to ensure that the center of gravity of the grass cutting blade is centered, to ensure dynamic balance during high-speed rotation, to reduce equipment vibration, and to reduce the load on the drive equipment. The grass-cutting blade of this utility model adopts a local quenching design of 65 manganese material to achieve wear resistance of the cutting part and overall fracture resistance, and avoid the blade from breaking due to vibration or impact. This utility model also protects a grass-cutting device. The grass-cutting blade of this utility model is aligned with the corresponding hole of the blade sleeve through the mounting hole and is fastened to the main shaft by bolts. This allows the grass-cutting blade to be replaced independently as needed. At the same time, the main axis of the grass-cutting blade is consistent with the extension direction of the blade sleeve, so that the cutting trajectory of the cutting edge matches the rotation trajectory of the main shaft, ensuring cutting stability. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a semi-bladed grass-cutting blade provided by this utility model; Figure 2 A front view of a semi-bladed grass-cutting blade provided by this utility model; Figure 3 The present utility model Figure 2 A magnified view of part A; Figure 4 This is a schematic diagram of the structure of a grass-cutting device provided by this utility model.

[0016] In the figure: 1. Blade body, 11. First end edge, 12. Second end edge, 13. First side edge, 14. Second side edge, 15. Blade spindle, 16. Cutting edge, 17. Weight reduction part, 18. Mounting hole; 2. Cladding layer; 21. Cladding layer body; 22. Arc-shaped overlay layer; 3 spindles; 4-blade sheath. Detailed Implementation

[0017] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-3 As shown, this utility model provides a semi-blade type grass cutting blade, which is a long strip plate-shaped piece, including a blade body 1, which has a first end edge 11 and a second end edge 12 opposite to each other, as well as a first side edge 13 and a second side edge 14. The first end edge 11, the second end edge 12, the first side edge 13 and the second side edge 14 together constitute the four sides of the grass cutting blade. The blade body 1 has a blade spindle axis 15, wherein, A cutting edge 16 is provided on the blade body 1. The cutting edge 16 is located on the first side edge 13. The cutting edge 16 is located on the leading edge of one side of the blade body 1 to cut straw. The blade body 1 is provided with a weight reduction part 17, which is located on the second side edge 14 and is arranged opposite to the cutting edge 16. The design of the weight reduction part 17 keeps the left and right center of gravity of the blade body 1 on the blade main axis 15. A cladding layer 2 is provided on the working surface of the cutting edge 16. The cladding layer 2 includes a cladding layer body 21 coated on the working surface of the cutting edge 16, and an arc-shaped overlay layer 22 formed at the intersection of the working surface of the cutting edge 16 and the first end edge 11. The working principle and beneficial effects of the above embodiments are as follows: This utility model provides a semi-bladed grass-cutting blade. The grass-cutting blade achieves cutting operations through the cutting edge 16 on the first side edge 13. When the grass-cutting blade rotates at high speed, the cutting edge 16 directly contacts the straw as the leading edge to complete the cutting action. The weight reduction part 17 on the second side edge 14 is arranged opposite to the cutting edge 16. The weight reduction part 17 is used to counteract the center of gravity shift caused by the structure of the cutting edge 16, ensuring that the left and right centers of gravity of the blade body 1 are always on the blade main axis 15. This design ensures the stability of the grass cutting blade when it rotates and avoids equipment vibration or equipment damage caused by center of gravity shift. A smoothly transitioning arc-shaped overlay layer 22 is formed at the intersection of the working surface of the cutting edge 16 and the first end edge 11, which enhances the structural strength of the edge of the cutting edge 16 and avoids problems such as curling and deformation of the cutting edge 16 due to stress during use. A cladding layer body 21 is provided on the working surface of the cutting edge 16. The cladding layer body 21 is prepared by processes such as brazing, laser cladding or plasma arc cladding, which improves the hardness and wear resistance of the working surface, extends the service life of the cutting edge 16, and reduces the edge wear caused by long-term cutting. This utility model provides a semi-edge grass cutting blade that greatly improves cutting efficiency and durability. The single-sided arrangement of the cutting edge 16 concentrates cutting performance, and the wear-resistant protection of the cladding layer 2 ensures both cutting sharpness and reduces the wear rate of the blade edge, extending the blade replacement cycle. The transition design of the arc-shaped cladding layer 22 avoids stress concentration at the intersection of the cutting edge 16 and the end edge, reducing the risk of blade edge breakage. This invention optimizes the weight distribution of the blade body 1, keeping the left and right centers of gravity of the blade on the main axis 15, ensuring dynamic balance during high-speed rotation, reducing equipment vibration and noise, and extending the service life of the overall equipment.

[0019] In one embodiment, The aforementioned cutting edge 16 also has a non-working surface, which is symmetrical to the working surface relative to the center of the insert body 1, and both are arranged in a wedge shape; Both the working and non-working surfaces of the cutting edge 16 are wedge-shaped. The symmetrical wedge design allows the stress of the cutting edge 16 to be evenly distributed along both sides during cutting. Compared with a single-sided wedge structure, it can better withstand the impact force during cutting, reduce faults such as edge bending and rolling, and extend service life.

[0020] In one embodiment, The length of the cutting edge 16 is set to 2 / 3 of the length of the first side edge 13; The cutting edge 16 covers 2 / 3 of the length of the first side edge 13, so that the blade body 1 has a sufficiently long cutting edge to contact the straw when rotating and cutting, and the remaining 1 / 3 of the length of the first side edge 13 is reserved as a non-cutting edge area, which serves as the mounting section for the device.

[0021] In one embodiment, The blade body 1 is provided with a mounting hole 18, which is opened on the blade main axis 15 and arranged near the second end edge 12. The aforementioned mounting holes 18 are arranged in the non-cutting edge area of ​​the blade body 1. The blade body 1 is fixed to the equipment by fasteners such as bolts. The mounting holes are located on the main axis 15. When the equipment drive shaft rotates, the torque can be evenly transmitted to the blade along the main axis, ensuring that the cutting edge 16 performs cutting operations with a stable speed and torque, and reducing centrifugal force and vibration caused by eccentricity during rotation.

[0022] In one embodiment, The blade body 1 is made of 65 manganese material. The cutting edge 16 and the arc-shaped protrusion 18 are subjected to high-temperature quenching process to increase their hardness and strength. The rest of the parts are not subjected to quenching process to retain the original toughness of the material. 65 manganese steel itself has high strength and elasticity. The cutting edge 16 is hardened by high temperature, which significantly improves its hardness and wear resistance, ensuring that the cutting edge 16 is not easy to chip or roll when it comes into contact with hard materials during the cutting process, and is not easy to deform when subjected to impact. The non-quenched area retains the toughness of the blade body 1. When encountering sudden load, the tough area can release stress through deformation, reducing the risk of the blade body 1 breaking as a whole and improving the safety of operation.

[0023] In one embodiment, The thickness of the cladding layer body 21 is 0.2-0.3mm; the thickness of the cladding layer body 21 of 0.2-0.3mm can form an effective protective layer on the surface of the cutting edge 16, ensuring its wear resistance while keeping the cutting edge sufficiently sharp, so as to ensure that the straw fiber can be cut quickly during cutting.

[0024] like Figure 4As shown, a grass-cutting device, such as the aforementioned grass-cutting blade, is provided with a main shaft 3, and a plurality of outwardly extending blade sleeves 4 are distributed in a ring on the circumferential surface of the main shaft 3. The blade sleeves 4 are perpendicular to the circumferential surface of the main shaft 3, and the grass-cutting blade is inserted into the blade sleeves 4. The grass-cutting blade is fixed in the blade sleeves 4 by fixing bolts that pass through the mounting holes 18 on the blade sleeves 4 and the grass-cutting blade. The main shaft 3 is a power component, which is driven to rotate by an external drive component. The blade sleeves 4, which are distributed in a ring on the circumference of the main shaft 3, rotate synchronously with the main shaft 3, and transmit power to the grass cutting blades inserted into the blade sleeves 4. The grass-cutting blade is aligned with the corresponding hole in the blade sleeve 4 through the mounting hole 18 and is fastened by the fixing bolt. The main axis 15 of the grass-cutting blade is aligned with the extension direction of the blade sleeve 4, so that the cutting trajectory of the cutting edge 16 matches the rotation trajectory of the main axis 3, ensuring cutting stability.

[0025] In one embodiment, The contact end between the blade sleeve 4 and the main shaft 3 is arc-shaped and welded to the main shaft 3. The arc-shaped design of the contact end of the blade sleeve 4 is completely in contact with the circumferential surface of the main shaft 3, increasing the contact area between the two. When the blade sleeve 4 is under force, the stress can be dispersed to a larger area of ​​the main shaft 3 through the arc-shaped contact surface, thereby improving the structural strength and durability of the grass cutting blade.

[0026] In one embodiment, The aforementioned blade body 1 is fitted inside the blade sleeve 4, and the portion of the blade body 1 extending out of the blade sleeve 4 is all configured as a cutting edge 16. The blade sleeve 4 serves as the mounting carrier for the blade body 1. It forms a radial constraint on the blade body 1 through a sleeve connection and is axially fixed by the fixing bolts. This allows the grass-cutting blade to move synchronously with the blade sleeve 4 when rotating at high speed, preventing displacement or detachment. The part of the blade body 1 that extends out of the blade sleeve 4 is all set as the cutting edge 16, ensuring that the effective cutting area of ​​the cutting edge 16 is completely exposed outside the blade sleeve 4, ensuring that the cutting action is concentrated and efficient.

[0027] In summary: This utility model discloses a semi-blade grass cutter blade, which is designed with a single-sided cutting edge to concentrate cutting performance. It is equipped with a wear-resistant cladding layer, which not only ensures the sharpness of the blade edge to quickly cut straw, but also significantly improves wear resistance and extends the service life of the blade edge. The arc-shaped overlay layer formed at the intersection of the working surface of the cutting edge and the first end edge can buffer the direct impact of hard impurities, enhance the structural strength of the cutting edge, prevent the cutting edge from curling or deforming under force, and ensure the continuity of cutting. The weight-reducing part on the second side edge is arranged opposite to the cutting edge, and works with the mounting hole on the main axis of the blade to ensure that the center of gravity of the grass cutting blade is centered, to ensure dynamic balance during high-speed rotation, to reduce equipment vibration, and to reduce the load on the drive equipment. The blade for cutting grass of this invention adopts a localized quenching design made of 65 manganese material, which achieves wear resistance at the cutting part and overall fracture resistance, thus avoiding blade breakage caused by vibration or impact.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The terms "front," "back," "left," and "right" used in the text are not specific and are mainly for more intuitive illustration of the technical solution, and do not constitute a limitation. Those skilled in the art should understand that the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made according to the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A semi-cutting blade for cutting grass, which is a long strip-shaped plate, characterized in that: It includes a blade body (1) having a first end edge (11) and a second end edge (12) opposite to each other, and a first side edge (13) and a second side edge (14). The blade body (1) has a blade spindle axis (15). in, A cutting edge (16) is provided on the blade body (1), and the cutting edge (16) is located on the first side edge (13); A weight-reducing part (17) is provided on the blade body (1). The weight-reducing part (17) is located on the second side edge (14) and is arranged opposite to the cutting edge (16). The center of gravity of the weight-reducing part (17) and the cutting edge (16) is located on the blade main axis (15). A cladding layer (2) is provided on the working surface of the cutting edge (16). The cladding layer (2) includes a cladding layer body (21) coated on the working surface of the cutting edge (16) and an arc-shaped cladding layer (22) formed at the intersection of the working surface of the cutting edge (16) and the first end edge (11).

2. The semi-cutting blade for cutting grass according to claim 1, characterized in that: The cutting edge (16) also has a non-working surface, which is symmetrical to the working surface relative to the center of the blade body (1), and both are arranged in a wedge shape.

3. The semi-cutting blade for cutting grass according to claim 1, characterized in that: The length of the cutting edge (16) is set to 2 / 3 of the length of the first side edge (13).

4. A semi-cutting blade for cutting grass according to claim 1, characterized in that: A mounting hole (18) is provided on the blade body (1), the mounting hole (18) is opened on the blade main axis (15) and arranged near the second end edge (12).

5. A semi-cutting blade for cutting grass according to claim 1, characterized in that: The blade body (1) is made of 65 manganese material, wherein the cutting edge (16) is hardened by high temperature.

6. A semi-cutting blade for cutting grass according to claim 1, characterized in that: The thickness of the cladding layer body (21) is 0.2-0.3 mm.

7. A grass-cutting device, characterized in that: The blade includes a grass-cutting blade as described in any one of claims 1-6, which has a main shaft (3) and a plurality of outwardly extending blade sleeves (4) distributed in a ring on the circumferential surface of the main shaft (3). The blade sleeves (4) are perpendicular to the circumferential surface of the main shaft (3), and the grass-cutting blade is inserted into the blade sleeves (4). The grass-cutting blade is fixed in the blade sleeves (4) by fixing bolts that pass through the mounting holes (18) on the blade sleeves (4) and the grass-cutting blade.

8. A grass-cutting device according to claim 7, characterized in that: The contact end between the tool sleeve (4) and the spindle (3) is arc-shaped and welded to the spindle (3).

9. A grass-cutting device according to claim 7, characterized in that: The blade body (1) is fitted inside the blade sleeve (4), and the portion of the blade body (1) extending out of the blade sleeve (4) is provided as a cutting edge (16).

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