Cutting tool for cutting off grass
Patent Information
- Application Number
- CN202522549321.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-01
AI Technical Summary
[0004]传统的旋耕刀具大都为“L型”或“弯刀”，其刀身通常由一端支杆和前端一个特定角度的弯曲部分组成，在其弯曲部分的内侧开刃成为正切刃，在实际的旋耕过程中，通过“钩挂、撕裂、抛掷”实现土壤的旋耕和平整，但是在实际的使用过程中，上述相关技术存在以下缺陷，在旋耕的过程中，刀具弯曲的刃口首先接触到草根，由于刀片此时处于高速旋转过程，其弯曲的形状极易将草根钩住或缠住，同时由于草根深植于土壤中，具有很大的抗拉强度，刀片对草根施加一个巨大的拉扯力，这个力不足以切断草根，而是将其从土壤中连根拔起或撕裂，进而导致杂草无法有效清除，拔起的杂草很多并未死亡，其根系或茎节与土壤接触，就很容易重新生根成活，无法有效消灭杂草，进而影响后续的作物生长
[0016]1. 通过设置水平方向的楔形第一切割部，并与弧形斩切部协同作用，在入土时能对草根形成高效的切割而非传统的钩挂拉扯，通过增设与第一切割部垂直的第二切割部，构成了一个立体的切割网络，能从多个方向彻底切断草根，避免了杂草被连根拔起后重新成活的问题，从而从根本上消灭了杂草，为后续作物生长创造了洁净的土壤环境；
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Figure CN224910144U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to a weed-cutting rotary tillage tool. Background Technology
[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.
[0003] A rotary tiller is a farmland tillage implement driven by the power take-off shaft of a tractor. Its core working component is a high-speed rotating cutter shaft with several rotary blades mounted on it. Due to its strong soil-breaking ability and ability to flatten the soil surface after tilling, it has been widely used. The rotary tiller rotates under the drive shaft of the implement, and the machine moves forward in a straight line. The rotary blades cut into the soil and throw the cut soil clods. After colliding with the soil retaining plate, the soil is further broken up and dragged to flatten the surface. The rotary tiller has the functions of breaking up the plow pan, restoring the soil structure, improving the soil's water retention capacity, eliminating some weeds, reducing pests and diseases, leveling the surface, and improving the standard of agricultural mechanization operations.
[0004] Traditional rotary tillers are mostly L-shaped or curved, with the blade typically consisting of a support at one end and a curved section at a specific angle at the front. The inner side of the curved section is sharpened to form a tangential edge. In actual rotary tillage, the soil is tilled and leveled through "hooking, tearing, and throwing." However, in practical use, the above-mentioned technology has the following drawbacks: During rotary tillage, the curved edge of the blade first contacts the grass roots. Because the blade is rotating at high speed, its curved shape easily hooks or entangles the grass roots. At the same time, since the grass roots are deeply embedded in the soil and have high tensile strength, the blade applies a huge pulling force to the grass roots. This force is not enough to cut the grass roots, but rather pulls or tears them from the soil by the roots. As a result, weeds cannot be effectively removed. Many of the pulled-out weeds are not dead, and their roots or stems can easily regrow and survive after contact with the soil, making it impossible to effectively eliminate weeds and thus affecting the growth of subsequent crops. Utility Model Content
[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a weed-cutting rotary tillage blade that can effectively cut grass roots below the ground surface, eliminate weeds, and improve the quality of subsequent crop growth.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A weed-cutting rotary tillage tool includes a tool body, the tool body including a mounting part and a cutting part, the mounting part being arranged horizontally in a straight line, the cutting part being disposed at one end of the mounting part and being arc-shaped, and a first cutting part being fixedly disposed on the protruding side of the cutting part along the horizontal direction, the width of the first cutting part on the side away from the cutting part being smaller than the width of the first cutting part on the side closer to the cutting part.
[0008] In some possible embodiments, a second cutting portion is fixedly provided on the cutting portion along the vertical direction. The length direction of the second cutting portion is perpendicular to the length direction of the first cutting portion. The side of the second cutting portion away from the first cutting portion is vertically arranged, and the side of the second cutting portion close to the first cutting portion is inclined. The bottom width of the second cutting portion is greater than the top width of the second cutting portion.
[0009] In some possible embodiments, a third cutting portion is provided on the side of the cutting portion away from the mounting portion, the end of the third cutting portion away from the cutting portion is inclined upward, and the horizontal extension direction of the third cutting portion is tangent to the side of the cutting portion away from the mounting portion.
[0010] In some possible embodiments, the third cutting portion is provided with a first cutting surface and a second cutting surface at the end away from the chopping portion, and the first cutting surface and the second cutting surface are converged on the side away from the chopping portion.
[0011] In some possible embodiments, the third cutting part is provided with a third cutting surface at one end away from the chopping part, the inclination angle of the third cutting surface is perpendicular to the tangent on the side of the chopping part away from the mounting part, one end of the third cutting surface is connected to the first cutting surface, and the other end is connected to the second cutting surface.
[0012] In some possible embodiments, the tilt angle of the third cutting portion is set to 25°-30°.
[0013] In some possible embodiments, the width of the mounting portion is smaller than the width of the cutting portion, and a connecting surface is provided at the connection between one side of the mounting portion and the cutting portion. The connecting surface is arc-shaped, and the convex surface of the connecting surface faces the same direction as the convex surface of the cutting portion.
[0014] In some possible embodiments, the surfaces of the chopping section, the first cutting section, the second cutting section, and the third cutting section are coated with an anti-stick coating, the material of which is a PTFE-nickel-based composite coating.
[0015] In summary, the technical solution of this utility model embodiment has at least the following advantages and beneficial effects:
[0016] 1. By setting a horizontal wedge-shaped first cutting section, which works in conjunction with an arc-shaped cutting section, it can efficiently cut grass roots when entering the soil, rather than the traditional hooking and pulling. By adding a second cutting section perpendicular to the first cutting section, a three-dimensional cutting network is formed, which can completely cut grass roots from multiple directions, avoiding the problem of weeds reviving after being pulled up by the roots. This fundamentally eliminates weeds and creates a clean soil environment for the growth of subsequent crops.
[0017] 2. The blade structure design effectively avoids the drawback of traditional curved blades that are prone to snagging grass roots. The vertical layout of the second cutting section and the upward extension of the third cutting section together change the way they contact weeds, enabling the guidance and cutting of tangled materials. This makes it difficult for weeds and roots to form continuous entanglement on the blade shaft and blades, significantly reducing the frequency of downtime for cleaning, ensuring the continuity and stability of rotary tillage operations, and improving overall work efficiency.
[0018] 3. The arc-shaped cutting head and multiple cutting heads work together to make the soil cutting process more delicate. The design of the third cutting head and its multiple cutting surfaces further enhances the soil breaking effect, which can cut soil clods into finer pieces. At the same time, the application of the anti-stick coating reduces the adhesion of soil to the blade surface, ensuring the continuous efficiency of the soil breaking process. The final result is a soft, flat and finely broken seedbed, which is very conducive to seed germination and root growth.
[0019] 4. The structural layout of the blade body, especially the smooth transition design of the arc-shaped connection surface between the mounting part and the cutting part, optimizes the stress state and helps the blade cut into the soil more smoothly. The third cutting part is tilted upward at an optimized angle of 25°-30°, which can effectively reduce forward resistance during operation. The overall structure enables the blade to achieve a deeper tillage depth under the same power and achieve a smoother and more energy-efficient tillage process. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the second cutting part according to an embodiment of the present utility model;
[0022] Figure 3 This is a schematic diagram of the structure of the third cutting part in an embodiment of the present utility model;
[0023] Figure 4 This is a schematic diagram of the connection surface in an embodiment of the present utility model.
[0024] Icons: 1. Tool body; 11. Mounting part; 12. Cutting part; 13. Mounting hole; 2. First cutting part; 3. Second cutting part; 4. Third cutting part; 5. First cutting surface; 6. Second cutting surface; 7. Third cutting surface; 8. Connecting surface. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] The following is for reference Figures 1 to 4 The present invention will be described in further detail below.
[0027] Reference Figure 1 A rotary tiller for cutting grass includes a blade body 1, which is preferably made of 65Mn manganese steel or higher grade alloy steel and is integrally forged to ensure the overall strength and toughness of the blade. Subsequently, the key cutting parts are subjected to local heat treatment to make their surface hardness reach HRC50-55, thereby ensuring that the blade edge has excellent wear resistance while maintaining the impact resistance of the blade body.
[0028] As one embodiment of this utility model, refer to Figure 1 and Figure 2 The blade body 1 includes a mounting part 11 and a cutting part 12. The mounting part 11 is a horizontally arranged plate-like structure. In one embodiment of this utility model, a mounting hole 13 is provided at the tail of the mounting part 11 for fixing the blade to the rotary tiller's cutter head with bolts or other fasteners. The cutting part 12 is fixedly disposed at one end of the mounting part 11. The cutting part 12 is an arc-shaped structure with a specific radius of curvature. This arc design makes the blade cut into the soil more smoothly when rotating, and can guide the soil and weeds to the subsequent cutting part by using the arc motion.
[0029] Reference Figure 2 As one embodiment of this utility model, a first cutting part 2 is fixedly provided horizontally on the protruding side of the cutting part 12, that is, the side facing the forward direction during operation. The width of the first cutting part 2 on the side away from the cutting part 12 is smaller than the width of the first cutting part 2 on the side close to the cutting part 12. The whole is wedge-shaped. Relying on the design of being narrow at the front and wide at the back, the first cutting part 2 can generate a squeezing and shearing force concentrated from both sides to the center when cutting into the grass roots and soil, so as to efficiently cut the grass roots instead of pulling them out as a whole, which greatly reduces the traction resistance.
[0030] Reference Figure 1 and Figure 2 A second cutting part 3 is fixedly provided on the cutting part 12 along the vertical direction. The length direction of the second cutting part 3 is perpendicular to the length direction of the first cutting part 2. The first cutting part 2 and the second cutting part 3 form a "cross" cutting line in space.
[0031] As one embodiment of this utility model, refer to Figure 2 The second cutting part 3 is vertically arranged away from the side of the first cutting part 2 and inclined to the side of the first cutting part 2. That is, the bottom width of the second cutting part 3 is greater than the top width of the second cutting part 3, forming a wedge angle in the vertical direction. This allows the blade to have excellent cutting ability in the vertical direction as well, which can cut the grass roots growing horizontally in the deep soil and effectively prevent the blade from getting tangled in the grass in the vertical direction.
[0032] Reference Figure 2 and Figure 3 A third cutting part 4 is provided on the side of the cutting part 12 away from the mounting part 11. The end of the third cutting part 4 away from the cutting part 12 is inclined upward. The extension direction of the third cutting part 4 in the horizontal direction is tangent to the side of the cutting part 12 away from the mounting part 11.
[0033] In one embodiment of this utility model, the tilt angle of the third cutting part 4 is set to 25°-30°.
[0034] In actual use, the third cutting section 4 can smoothly receive and process the soil and stubble from the cutting section 12. Its upward tilt helps to guide the material backward and throw it up, preparing it for impact and crushing with the retaining plate. It can minimize forward resistance while ensuring effective soil throwing.
[0035] Reference Figure 3 In one embodiment of this utility model, the third cutting part 4 has a first cutting surface 5 and a second cutting surface 6 at the end away from the chopping part 12. The first cutting surface 5 and the second cutting surface 6 are converging on the side away from the chopping part 12. The third cutting part 4 has a third cutting surface 7 at the end away from the chopping part 12. The inclination angle of the third cutting surface 7 is perpendicular to the tangent line of the chopping part 12 on the side away from the mounting part 11. One end of the third cutting surface 7 is connected to the first cutting surface 5, and the other end is connected to the second cutting surface 6. A three-sided wedge structure is formed at the end, which not only makes it easy to cut into the soil and grass mat, but also produces multi-directional tearing and shearing action on the soil clods during rotation, significantly improving the fineness of the broken soil.
[0036] Reference Figure 4The width of the mounting part 11 is smaller than the width of the cutting part 12. A connecting surface 8 is provided at the connection between the mounting part 11 and the cutting part 12. The connecting surface 8 is arc-shaped, and the convex surface of the connecting surface 8 faces the same direction as the convex surface of the cutting part 12, forming a smooth transition. This can effectively avoid stress concentration at the root position where the stress is greatest, and significantly improve the fatigue resistance and service life of the tool.
[0037] In one embodiment of this utility model, the surfaces of the chopping section 12, the first cutting section 2, the second cutting section 3, and the third cutting section 4 are coated with an anti-stick coating. The anti-stick coating is made of PTFE-nickel-based composite material. The coating uses nickel-based metal as a substrate, providing good adhesion and wear resistance. The composite polytetrafluoroethylene (PTFE) particles give the coating extremely low surface energy and excellent non-stick properties, making it difficult for soil and water to adhere to the blade surface, maintaining the cleanliness of the blade during continuous operation, thereby stabilizing tillage depth and quality, and further reducing energy consumption.
[0038] The implementation principle of the weed-cutting rotary tillage tool proposed in this embodiment of the invention is as follows:
[0039] By setting up a horizontally oriented wedge-shaped first cutting section 2, which works in conjunction with the arc-shaped cutting section 12, it can efficiently cut the grass roots when entering the soil, rather than the traditional hooking and pulling. By adding a second cutting section 3 perpendicular to the first cutting section 2, a three-dimensional cutting network is formed, which can completely cut the grass roots from multiple directions, avoiding the problem of weeds reviving after being pulled up by the roots. This fundamentally eliminates weeds and creates a clean soil environment for the growth of subsequent crops.
[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A rotary tillage blade for cutting weeds, comprising a blade body (1), characterized in that: The tool body (1) includes a mounting part (11) and a cutting part (12). The mounting part (11) is arranged horizontally and linearly. The cutting part (12) is located at one end of the mounting part (11). The cutting part (12) is arranged in an arc shape. A first cutting part (2) is fixedly arranged on the protruding side of the cutting part (12) in the horizontal direction. The width of the first cutting part (2) away from the cutting part (12) is smaller than the width of the first cutting part (2) close to the cutting part (12).
2. The rotary tiller blade for cutting weeds according to claim 1, characterized in that: The cutting part (12) is fixedly provided with a second cutting part (3) along the vertical direction. The length direction of the second cutting part (3) is perpendicular to the length direction of the first cutting part (2). The second cutting part (3) is vertically arranged on the side away from the first cutting part (2). The second cutting part (3) is inclined on the side close to the first cutting part (2). The bottom width of the second cutting part (3) is greater than the top width of the second cutting part (3).
3. The rotary tiller blade for cutting weeds according to claim 2, characterized in that: A third cutting part (4) is provided on the side of the cutting part (12) away from the mounting part (11). The end of the third cutting part (4) away from the cutting part (12) is inclined upward. The extension direction of the third cutting part (4) in the horizontal direction is tangent to the side of the cutting part (12) away from the mounting part (11).
4. The rotary tiller blade for cutting weeds according to claim 3, characterized in that: The third cutting part (4) is provided with a first cutting surface (5) and a second cutting surface (6) at one end away from the chopping part (12), and the first cutting surface (5) and the second cutting surface (6) are closed on the side away from the chopping part (12).
5. A rotary tiller blade for cutting weeds according to claim 4, characterized in that: The third cutting part (4) is provided with a third cutting surface (7) at one end away from the chopping part (12). The inclination angle of the third cutting surface (7) is perpendicular to the tangent line of the chopping part (12) away from the mounting part (11). One end of the third cutting surface (7) is connected to the first cutting surface (5), and the other end is connected to the second cutting surface (6).
6. A rotary tiller blade for cutting weeds according to claim 3, characterized in that: The tilt angle of the third cutting section (4) is set to 25°-30°.
7. A rotary tiller blade for cutting weeds according to any one of claims 1-6, characterized in that: The width of the mounting part (11) is smaller than the width of the cutting part (12). A connecting surface (8) is provided at the connection between one side of the mounting part (11) and the cutting part (12). The connecting surface (8) is arc-shaped, and the convex surface of the connecting surface (8) faces the same direction as the convex surface of the cutting part (12).
8. A rotary tiller for cutting weeds according to claim 5, characterized in that: The surfaces of the cutting section (12), the first cutting section (2), the second cutting section (3) and the third cutting section (4) are coated with an anti-stick coating, and the material of the anti-stick coating is set as PTFE-nickel-based composite coating.