Lawn mower blade, cutting mechanism, lawn mower robot and system thereof

Abstract

The application provides a mowing blade, a cutting mechanism, a mowing robot and a system thereof, comprising a mounting section and a cutting section, the mounting section has a mounting surface, the cutting section is connected to one end of the mounting section, a cutting body of the cutting section has a main cutting edge and at least one auxiliary cutting edge, the main cutting edge is formed on a first side edge of the cutting body, the auxiliary cutting edge is formed on a second side edge of the cutting body, and the second side edge is opposite to the first side edge; wherein the auxiliary cutting edge is arranged obliquely relative to the mounting surface, and the height of the auxiliary cutting edge gradually increases in the direction from the first side edge to the second side edge. The mowing blade provided by the application solves the technical problem of how to improve the crushing effect of grass clippings of a mowing machine in the prior art.

Description

Technical Field

[0001] This application belongs to the field of garden tool technology, and more specifically, relates to a lawn mower blade, a cutting mechanism, a lawn mowing robot and its system. Background Technology

[0002] A lawnmower is a common gardening device used to cut lawn vegetation. It uses rotating blades to cut the grass layer and achieve a smoothing effect on the lawn surface.

[0003] To improve work efficiency and lawn quality, it is generally desirable to produce grass clippings as finely as possible. However, the blade structure of existing lawnmowers is mostly based on a single main cutting edge, which makes it difficult to achieve efficient and fine clipping of grass clippings.

[0004] Therefore, how to improve the structure of lawn mower blades to enhance the grass clipping effect is an urgent problem to be solved in this field. Utility Model Content

[0005] The purpose of this application is to provide a lawn mower blade, a cutting mechanism, a lawn mower robot and its system, in order to solve the technical problem of how to improve the grass clipping effect of the lawn mower in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a lawn mower blade is provided, comprising an installation section and a cutting section. The installation section has an installation surface, and the cutting section is connected to one end of the installation section. The cutting body of the cutting section has a main cutting edge and at least one secondary cutting edge. The main cutting edge is formed on a first side of the cutting body, and the secondary cutting edge is formed on a second side of the cutting body, with the second side opposite to the first side. The secondary cutting edge is inclined relative to the installation surface, and its height gradually increases along the direction from the first side to the second side.

[0007] In one alternative embodiment, the angle α between the secondary cutting edge and the mounting surface is 45° to 60°.

[0008] In one optional embodiment, the angle β between the secondary cutting edge and the tangential direction is 30° to 50°, the tangential direction passes through the rotation center of the mowing blade, and is perpendicular to the length direction of the mowing blade.

[0009] In one optional embodiment, the secondary cutting edge is a protrusion structure formed by bending and extending from the cutting body; and / or, the height of the secondary cutting edge relative to the mounting surface is 0~3mm.

[0010] In one alternative embodiment, the cutting body is planar or curved, and the height of the cutting body gradually increases along the direction from the first side to the second side; and / or, the distal end face of the cutting body is arc-shaped, and the distal end is the end of the cutting body away from the mounting section.

[0011] In one alternative embodiment, the cutting edge of the secondary cutting blade is the side of the secondary cutting blade that is close to the first side and far away from the mounting section.

[0012] In one alternative embodiment, multiple secondary cutting blades are provided, which are spaced apart along the length of the mowing blade, and the multiple secondary cutting blades have the same height; and / or, along the length of the mounting section to the cutting section, the height of the multiple secondary cutting blades gradually increases or decreases.

[0013] In an alternative embodiment, the side surface of the first secondary cutting edge near the mounting section is coplanar with the side surface of the cutting section.

[0014] In an alternative embodiment, the mowing blade further includes a transition section, one end of which is connected to the mounting section, and the other end of which bends downward and extends to connect with the cutting section.

[0015] Another objective of this application is to provide a cutting mechanism, including a blade disc and at least one mowing blade as described above, the mowing blade being connected to the blade disc and extending from the circumferential edge of the blade disc.

[0016] In one optional embodiment, the cutter head has a first end face, and at least one blade mounting portion is provided in the peripheral area of ​​the first end face. The mounting section of the mowing blade is connected to the blade mounting portion. A recess is provided in the middle area of ​​the first end face, and the cutter head mounting portion is provided in the recess. Along the thickness direction of the cutter head, the distance between the blade mounting portion and the cutter head mounting portion is 5mm to 10mm.

[0017] In an optional embodiment, the first end face of the cutter disc is further provided with at least one limiting structure, the limiting structure having at least one limiting part for limiting the rotation angle of the mowing blade.

[0018] In one optional embodiment, the blade mounting portion is provided with a connecting hole for connecting to a mowing blade; the distance between the limiting structure and the periphery of the cutter head is greater than the distance between the connecting hole and the periphery of the cutter head; or, the distance between the limiting portion and the periphery of the cutter head is greater than the distance between the connecting hole and the periphery of the cutter head.

[0019] In one optional embodiment, the first end face of the cutter head is provided with a first blade mounting portion and a second blade mounting portion, and a limiting structure is located between the first blade mounting portion and the second blade mounting portion; the limiting structure is provided with a first limiting portion and a second limiting portion, the first limiting portion is used to limit the stroke of the mowing blade connected to the first blade mounting portion in the first rotation direction, and the second limiting portion is used to limit the stroke of the mowing blade connected to the second blade mounting portion in the second rotation direction.

[0020] Another objective of this application is to provide a lawn mowing robot, including a drive mechanism and a cutting mechanism as described above, with the blade disk connected to the output end of the drive mechanism.

[0021] Another objective of this application is to provide a lawnmower robot system, including a base station and a lawnmower robot as described above, wherein the base station is at least used for charging the lawnmower robot.

[0022] The beneficial effects of the lawn mowing blade, cutting mechanism, lawn mowing robot and system provided in this application are as follows: Compared with the prior art, the lawn mowing blade of the embodiments of this application provides a main cutting blade on the first side of the cutting body of the cutting section and at least one secondary cutting blade on the opposite second side. The secondary cutting blade is inclined relative to the mounting surface, and the height of the secondary cutting blade gradually increases along the direction from the first side to the second side, so that the cutting trajectories of the main cutting blade and the secondary cutting blade are distributed at different heights of the blade disc. After the grass blade is cut by the main cutting blade, it can be effectively intercepted by the secondary cutting blade, and the grass blade is cut and broken up again, finally forming fine grass clippings, which significantly improves the fineness of grass clippings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the lawnmower blade provided in the first embodiment of this application; Figure 2 A top view of the lawnmower blade provided in the first embodiment of this application; Figure 3 This is a front view of the lawnmower blade provided in the first embodiment of this application; Figure 4 Left view of the lawnmower blade provided in the first embodiment of this application; Figure 5 This is a schematic diagram of the structure of the lawnmower blade provided in the second embodiment of this application; Figure 6 A top view of the lawnmower blade provided in the second embodiment of this application; Figure 7 This is a front view of the lawnmower blade provided in the second embodiment of this application; Figure 8 Left view of the lawnmower blade provided in the second embodiment of this application; Figure 9 A top view of the lawnmower blade provided in the third embodiment of this application; Figure 10 A schematic diagram of the cutter head provided in the embodiments of this application. Figure 1 ; Figure 11 A schematic diagram of the cutter head provided in the embodiments of this application. Figure 2 ; Figure 12 A schematic diagram of the cutter head provided in the embodiments of this application. Figure 3 .

[0025] The following are the labeling elements in the figure: 100-Cutting mechanism; 10-Grass mower blade; 10a-Rotation center; 11-Mounting section; 111-Mounting surface; 12-Transition section; 13-Cutting section; 131-Cutting body; 1311-Main cutting blade; 1312-Secondary cutting blade; 1312a-Cutting edge; 1313-First side; 1314-Second side; 1315-Far end; 20-Cutter disc; 21-First end face; 22-Blade mounting part; 22a-First blade mounting part; 22b-Second blade mounting part; 221-Connecting hole; 23-Recess; 231-Cutter disc mounting part; 24-Avoidance recess; 25-Limiting structure; 251-Limiting part; 25a-First limiting part; 25b-Second limiting part. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Lawn mowers are common gardening equipment used to cut lawn vegetation. They use rotating blades to shear the grass layer, achieving a smooth lawn surface. If the cut grass clippings are large, they are prone to falling onto the lawn in large clumps due to their own weight and entanglement, forming localized piles that affect the lawn's appearance and healthy growth. In lawn mowers using grass bags, the density of the grass clippings directly affects the duration of a single operation and the frequency of cleaning. To improve work efficiency and lawn quality, it is generally desirable to produce grass clippings as finely as possible. However, the blade structure of existing lawn mowers is mostly based on a single main cutting edge, limiting the number of cuts and making it difficult to achieve efficient and fine clipping.

[0031] Therefore, how to improve the structure of lawn mower blades to enhance the grass clipping effect is an urgent problem to be solved in this field.

[0032] Please refer to the following: Figures 1 to 9 The lawnmower blade 10 provided in this application embodiment will now be described. The lawnmower blade 10 includes an installation section 11 and a cutting section 13. The installation section 11 has an installation surface 111. The cutting section 13 is connected to one end of the installation section 11. The cutting body 131 of the cutting section 13 has a main cutting edge 1311 and at least one secondary cutting edge 1312. The main cutting edge 1311 is formed on a first side 1313 of the cutting body 131, and the secondary cutting edge 1312 is formed on a second side 1314 of the cutting body 131. The second side 1314 is opposite to the first side 1313. The secondary cutting edge 1312 is inclined relative to the installation surface 111, and the height of the secondary cutting edge 1312 gradually increases along the direction from the first side 1313 to the second side 1314.

[0033] Mounting section 11 is the part of the blade used to connect to the cutter head 20 or the drive shaft. Specifically, it can be a plate-like structure with a flat surface or a block-like structure with mounting holes. Mounting section 11 has a mounting surface 111 for stably fixing the blade to the cutter head 20.

[0034] The cutting section 13 refers to the part of the blade that cuts lawn vegetation. The cutting body 131 of the cutting section 13 has a first side 1313 (leading edge) and a second side 1314 (rear edge). The first side 1313 is provided with a main cutting edge 1311, and the second side 1314 is provided with a secondary cutting edge 1312. The main cutting edge 1311 is the main blade on the cutting body 131 used to cut grass blades. The main cutting edge 1311 forms a sharp edge on the first side 1313 of the cutting body 131. When the mowing blade 10 rotates, the main cutting edge 1311 completes the initial cutting of the grass layer. The secondary cutting edge 1312 refers to the blade on the cutting body 131 used for secondary cutting. The secondary cutting edge 1312 is inclined relative to the mounting surface 111, forming an inclined blade to cut and break up grass clippings.

[0035] The secondary cutting blade 1312 is inclined relative to the mounting surface 111, meaning that its blade forms a certain angle with the mounting surface 111. Along the direction from the first side 1313 to the second side 1314, the height of the secondary cutting blade 1312 gradually increases, enabling the secondary cutting blade 1312 to effectively intercept the grass clippings cut by the main cutting blade 1311. This allows the grass clippings to undergo continuous shearing and dispersing, thereby improving the fine fragmentation effect of the grass clippings and solving the problem of insufficient fragmentation effect caused by the single blade structure of existing blades.

[0036] The number of secondary cutting blades 1312 can be set to multiple as needed, such as two, or three or more. In some embodiments, such as... Figure 1 and Figure 5 The cutting body 131 is equipped with three secondary cutting blades 1312 to enhance the crushing effect on grass clippings.

[0037] During operation, the grass-cutting blade 10 rotates at high speed. The main cutting blade 1311 first cuts the grass blades. The cut grass clippings fly outward under the action of centrifugal force. At this time, the flying grass clippings will encounter the inclined secondary cutting blade 1312. As the height of the secondary cutting blade 1312 gradually increases, the grass clippings will be further sheared, torn and broken up, eventually forming fine grass clipping particles. The secondary cutting significantly improves the fineness of the grass clippings.

[0038] Fine grass clippings decompose more easily, accelerating nutrient cycling, improving the lawn's ecological environment, reducing localized accumulation, and maintaining the lawn's appearance and healthy growth. Simultaneously, the finer grass clipping particles have better flowability, are less prone to tangling, and can more smoothly enter the grass collection channel and distribute evenly within the collection bag, increasing the grass clipping density within the bag. This reduces the frequency of bag cleaning, increases single-operation time and work efficiency, and ultimately enhances the user experience. Furthermore, the inclined arrangement of the secondary cutting blade 1312 on the second side 1314 does not interfere with the normal mowing function of the main cutting blade 1311, resulting in a reasonable structure suitable for various types of lawnmower robots.

[0039] Compared with the prior art, the lawn mower blade 10 provided in this application embodiment has a main cutting blade 1311 set on the first side 1313 of the cutting body 131 of the cutting section 13, and at least one secondary cutting blade 1312 set on the opposite second side 1314. The secondary cutting blade 1312 is inclined relative to the mounting surface 111, and the height of the secondary cutting blade 1312 gradually increases along the direction from the first side 1313 to the second side 1314, so that the cutting trajectories of the main cutting blade 1311 and the secondary cutting blade 1312 are distributed at different heights of the blade disc. After the grass leaves are cut by the main cutting blade 1311, they can be effectively intercepted by the secondary cutting blade 1312, and the grass leaves are cut and broken up again, finally forming fine grass clippings, which significantly improves the fineness of grass clippings.

[0040] Please refer to some embodiments of this application. Figures 1 to 4 The included angle α between the secondary cutting edge 1312 and the mounting surface 111 is 45°~60°.

[0041] By limiting the range of the included angle between the secondary cutting blade 1312 and the mounting surface 111, it is ensured that the direction of the shearing force on the grass clippings when they move in the cutting section 13 matches the trajectory of the grass clippings.

[0042] After the grass blades are cut by the main cutting blade 1311, they move along the surface of the cutting body 131 towards the second side 1314, keeping the included angle α between 45° and 60°. At this time, the secondary cutting blade 1312 cuts the grass blades at an inclination angle of 45° to 60°, tearing them into finer fragments through shearing force. This avoids energy loss or grass fragment residue caused by excessively large or small angles, and improves the consistency of grass fragmentation.

[0043] In some embodiments, the angle α between the secondary cutting blade 1312 and the mounting surface 111 can be specifically set to 50° or 55°. This allows the secondary cutting blade 1312 to contact the grass clippings at an appropriate angle, effectively performing secondary cutting without excessively increasing the power consumption of the lawnmower robot.

[0044] Please refer to some embodiments of this application. Figure 2 and Figure 6 The angle β between the secondary cutting blade 1312 and the tangential direction X is 30°~50°. The tangential direction X passes through the rotation center 10a of the mowing blade 10 and is perpendicular to the length direction Y of the mowing blade 10.

[0045] The tangential direction X is defined as the axis passing through the rotation center 10a of the mower blade 10 and perpendicular to the length direction of the mower blade 10. For example... Figure 2 and Figure 6 The mounting surface 111 of the lawn mower blade 10 has a mounting hole for connecting to the blade, and the center of the mounting hole is the rotation center 10a.

[0046] Setting the angle β between the secondary cutting blade 1312 and the tangential direction X within the range of 30° to 50° is beneficial for forming a favorable shearing angle in the relative movement direction between the blade and the grass blade. This facilitates cutting the grass blade and avoids situations where an excessively large angle (such as close to 90°) causes compression rather than cutting, or an excessively gentle angle (such as close to 0°) causes the grass blade to slip and not be cut. Simultaneously, since the secondary cutting blade 1312 gradually increases in height, this angle allows for a gradual entry, increasing the contact area and contact time between the secondary cutting blade 1312 and the grass clippings, thereby improving the cutting effect and enhancing cutting stability.

[0047] The included angle β can be 35°, 40°, or 45°. In some embodiments, the included angle β is set to 40°. This angle ensures that the secondary cutting blade 1312 maintains sufficient cutting depth during the secondary shearing process, while also preventing grass clippings from accumulating at the front end of the blade due to excessive angle, thereby further improving the degree of grass clipping breakage.

[0048] In addition, such as Figure 2 and Figure 6 The secondary cutting edge 1312 can be tilted to both sides along the tangential direction X, as long as the tilt angle of the secondary cutting edge 1312 is maintained.

[0049] In the first embodiment of this application, as Figures 1 to 4 The secondary cutting blade 1312 is inclined in the direction away from the mounting section 11 along the tangential direction X. Its inclined surface forms a certain obstruction and guiding effect during rotation, which is conducive to generating a local low-pressure backflow zone in the outer area of ​​the cutter head 20, prolonging the residence time of grass clippings in the cutting space, promoting repeated tumbling of grass clippings and multiple passes through the main cutting blade 1311 and the secondary cutting blade 1312, achieving efficient cyclic cutting and improving the crushing effect.

[0050] In the second embodiment of this application, as Figures 5 to 8 The secondary cutting blade 1312 is inclined along the tangential direction toward the direction close to the installation section 11. Its inclined surface forms an outwardly expanding guide slope, which can more effectively guide the airflow outward to accelerate the flow, making it easier to quickly roll up the grass clippings and transport them to the discharge outlet for discharge, significantly improving the grass discharge efficiency.

[0051] Please refer to some embodiments of this application. Figure 1 and Figure 5 The secondary cutting blade 1312 is a protrusion structure formed by bending and extending the cutting body 131.

[0052] The secondary cutting blade 1312 extends from the base of the cutting body 131 at a certain angle, forming a block-shaped protrusion with a sharp edge. The protrusion structure can be triangular, trapezoidal, etc. The protrusion structure can be integrally injection molded or stamped, which is a mature process with low cost, suitable for mass production.

[0053] The secondary cutting blade 1312 is formed directly from the blade body material. The convex structure itself has a certain rigidity support, which can withstand the impact when mowing grass and maintain structural stability under long-term high-speed rotation and complex load.

[0054] The bump structure can be designed to extend smoothly from the corner where the cutting body 131 bends, so that the transition is natural, the stress distribution is uniform when under force, and it is not easy to break or deform, which can improve the durability of the lawn mower blade 10.

[0055] Please refer to some embodiments of this application. Figures 3 to 7 The height of the secondary cutting blade 1312 relative to the mounting surface 111 is 0~3mm.

[0056] The raised secondary cutting blade 1312 can be formed by stamping or bending, and its base maintains a continuous transition with the cutting body 131. When the lawnmower moves on the lawn, the main cutting blade 1311 first cuts the grass blades, and then the raised secondary cutting blade 1312 further shears and tears the cut grass clippings, thereby achieving a finer cutting effect.

[0057] Setting the height of the secondary cutting blade 1312 relative to the mounting surface 111 between 0 and 3 mm can both avoid excessive wind resistance leading to increased load and maintain the secondary shearing performance of the grass blades.

[0058] During the high-speed rotation of the blade, grass clippings are cut by the main cutting edge 1311 and move along the surface of the cutting body 131. The raised structure of the secondary cutting edge 1312 forms a stepped shearing surface. When grass clippings contact the secondary cutting edge 1312, which has a height ranging from 0 to 3 mm, the grass blades can be subjected to shearing action at different depths. A lower raised height reduces air resistance, while a higher raised height enhances the crushing ability of the grass blades. The raised height can be 1 mm, 1.5 mm, or 2 mm, etc. In some embodiments, the secondary cutting edge 1312 is raised 1.5 mm relative to the mounting surface 111. This avoids excessive load and energy consumption due to excessive height from the mounting surface 111, while ensuring that the grass clippings continuously withstand multi-stage shearing action during the sliding process on the blade surface, achieving a balance between energy consumption and crushing effect.

[0059] Please refer to some embodiments of this application. Figures 1 to 8 The cutting body 131 is a plane or a curved surface, and the height of the cutting body 131 gradually increases along the direction from the first side 1313 to the second side 1314.

[0060] When the cutting body 131 is planar, it is suitable for low-speed operation and achieves basic shearing through a linear cutting edge. The height of the cutting body 131 increases linearly from the first side 1313 to the second side 1314, forming an inclined plane. This change in height creates a stepped working area for the cutting body 131. After the main cutting edge 1311 completes the initial cut of the grass blades, the grass clippings slide along the inclined plane to the secondary cutting edge 1312 for secondary cutting and crushing.

[0061] When the cutting body 131 is curved, the curved cutting body 131 can form a spiral upward airflow during rotation, guiding the grass clippings towards the secondary cutting blade 1312, which facilitates the cutting of the grass clippings. At the same time, the surface of the cutting section 13 forms a smooth arc-shaped surface. When the lawnmower is running, the airflow enters from the lower first side 1313, then flows smoothly backward along the arc-shaped surface of the cutting section 13 to the higher second side 1314 and is discharged. By guiding the airflow to flow smoothly along the curved surface, the airflow path is optimized, and the pressure difference between the front and rear of the mowing blade 10 is reduced, thus reducing aerodynamic noise.

[0062] In the third embodiment of this application, as Figure 9 The distal end 1315 of the cutting body 131 has an arc-shaped end face, and the distal end 1315 is the end of the cutting body 131 that is far away from the mounting section 11.

[0063] The arc-shaped end face has a smooth transition surface, avoiding abrupt structural changes. The radius of curvature of the arc can be adjusted according to actual needs. The arc-shaped distal end 1315 end face can be processed by machining or molding. The arc shape of the distal end 1315 end face can extend to the entire width of the cut segment 13, or it can only cover a portion of the width.

[0064] By designing an arc-shaped end face, the contact between the lawn mower blade 10 and the air can be improved during the rotation of the blade, guiding the airflow to transition smoothly along the tangential direction and reducing airflow separation and turbulence. The arc-shaped distal end face 1315 allows the airflow to bypass the lawn mower blade 10 more smoothly, reducing aerodynamic noise during blade operation. At the same time, the arc-shaped end face can also disperse end stress, avoiding local stress concentration, thereby enhancing the structural strength of the lawn mower blade 10 and extending its service life.

[0065] Please see Figure 1 and Figure 5 In the first and second embodiments described above, the cutting edge 1312a of the secondary cutting blade 1312 is the side of the secondary cutting blade 1312 that is close to the first side 1313 and far away from the mounting section 11.

[0066] Regardless of whether the secondary cutting blade 1312 is tilted towards the direction closer to the mounting section 11 or towards the direction farther from the mounting section 11, as long as its cutting edge 1312a is always located on the side of the secondary cutting blade 1312 that is closer to the first side 1313 and farther from the mounting section 11, it can be ensured that the grass clippings will be efficiently sheared by the cutting edge 1312a under the centrifugal force generated by the rotation of the mowing blade 10, which significantly improves the fineness and uniformity of the grass clippings.

[0067] Furthermore, the cutting action of the secondary cutting edge 1312 all occurs in the outer edge area of ​​the blade's high-speed rotation. The outer linear velocity is high, the shearing force is stronger, and the shearing effect can be enhanced.

[0068] Please refer to some embodiments of this application. Figures 1 to 8 Multiple secondary cutting blades 1312 are provided, and the multiple secondary cutting blades 1312 are spaced apart along the length direction of the mowing blade 10, and the multiple secondary cutting blades 1312 have the same height.

[0069] Multiple secondary cutting blades 1312 are arranged at intervals along the length of the blade to form a segmented cutting structure. Each secondary cutting blade 1312 is set independently, and there are gaps between adjacent secondary cutting blades 1312. This design can expand the cutting range, so that the secondary cutting blades 1312 can better cut and break up the grass clippings multiple times, further improving the fineness of the grass clippings.

[0070] The width of the gap can be adjusted according to the overall length of the mowing blade 10. By controlling the gap width, the cutting effect and resistance can be balanced, preventing excessive load.

[0071] When the mowing blade 10 rotates, the grass clippings are cut by the main cutting blade 1311 and then carried by the rotating blade to different secondary cutting blades 1312. Multiple secondary cutting blades 1312 sequentially shear the grass clippings. Simultaneously, the gaps between adjacent secondary cutting blades 1312 disperse the grass clippings, preventing them from accumulating during cutting, reducing the risk of clogging, and improving mowing efficiency. Three to five secondary cutting blades 1312 can be installed on the cutting body 131, increasing the number of times the grass clippings are cut.

[0072] Furthermore, the consistent height of all secondary cutting blades 1312 ensures that each blade applies the same lifting force and cutting action to the grass clippings during rotation, achieving a stable secondary cutting effect. This design also facilitates uniform airflow guidance, and the uniform height design is beneficial for mold-based production and processing control during manufacturing.

[0073] Please refer to some embodiments of this application. Figures 1 to 8Multiple secondary cutting blades 1312 are provided, and the multiple secondary cutting blades 1312 are spaced apart along the length direction of the mowing blade 10. Along the length direction from the mounting section 11 to the cutting section 13, the height of the multiple secondary cutting blades 1312 gradually increases or decreases.

[0074] The height of the secondary cutting blade 1312 gradually increases along the length of the installation section 11 to the cutting section 13, causing the outer secondary cutting blade 1312 to be raised higher, forming an outer converging structure. This effectively controls the outward spread of grass clippings and throws them higher under high-speed rotation, increasing the contact opportunities with the main cutting blade 1311 and the secondary cutting blade 1312, achieving multiple thorough cuts, and significantly improving the fineness of the grass clippings and the overall cutting effect.

[0075] The height of the secondary cutting blade 1312 gradually decreases along the length of the installation section 11 to the cutting section 13. The lower outer secondary cutting blade 1312 forms an open outlet, which, together with the airflow circulation, facilitates the smooth discharge of the cut grass clippings.

[0076] Please refer to some embodiments of this application. Figures 1 to 3 The side surface of the first secondary cutting blade 1312 near the mounting section 11 is coplanar with the side surface of the cutting section 13.

[0077] The side surface of the first secondary cutting edge 1312 is coplanar with the side surface of the cutting section 13, so that the two can share the same machining reference surface during machining, without the need to adjust the tool position or change the machining process separately.

[0078] In other words, the common end face design allows both end faces to be cut in the same plane, and the tool path does not need to lift or turn at the junction of the two, reducing machining steps and reducing machining complexity.

[0079] Furthermore, it avoids creating unnecessary steps during end-face machining. This improves machining efficiency while reducing material waste. In addition, since the two are coplanar, stress concentration at the connection between the cutting section 13 and the first secondary cutting edge 1312 is reduced, ensuring the overall structural strength of the blade.

[0080] Please refer to some embodiments of this application. Figure 1-3 , Figure 5-7 The lawn mower blade 10 also includes a transition section 12, one end of which is connected to the mounting section 11, and the other end of which bends downward and extends to connect with the cutting section 13.

[0081] The transition section 12 is the middle part connecting the installation section 11 and the cutting section 13, and plays a transition role. The transition section 12 is used to transfer the supporting force of the installation section 11 to the cutting section 13.

[0082] The other end of the transition section 12 bends downward, that is, it bends and extends towards the side closer to the working surface. The cutting section 13 is then connected to it, so that the cutting section 13 is positioned lower than the installation section 11. After the cutting section 13 sinks down, it is closer to the lawn surface, which can ensure accurate cutting of grass blades.

[0083] The bending design of the transition section 12 also helps improve the overall airflow distribution, guiding the airflow from the inside of the blade to the outside in an orderly manner, reducing the local accumulation of grass clippings on the inside of the blade disc 20, and making grass removal smoother. At the same time, the bending design improves the overall structural rigidity and bending resistance of the mowing blade 10, and can better disperse stress when subjected to collisions or impacts, reducing the risk of blade deformation or breakage, and enhancing the durability and safety of the blade.

[0084] Please see Figures 1 to 12 This application provides a cutting mechanism 100, including a cutter disc 20 and at least one mowing blade 10 as described above. The mowing blade 10 is connected to the cutter disc 20 and extends out of the cutter disc 20 from its circumferential edge.

[0085] The mounting section 11 of the lawn mower blade 10 is connected to the blade disc 20, while the cutting section 13 extends beyond the periphery of the blade disc 20, ensuring that it can directly contact the lawn vegetation during operation and achieve effective cutting.

[0086] The lawn mowing blade 10 can be fixedly connected to the blade disc 20 or rotatably connected to the blade disc 20, such as through a rotating shaft structure or a hinge structure, to form a swivel blade.

[0087] Two, three or more grass-cutting blades 10 can be set. Multiple grass-cutting blades 10 are distributed circumferentially and extend outward to form a cutting array, which can complete multi-point cutting in one stroke and improve grass-cutting efficiency.

[0088] Please refer to some embodiments of this application. Figures 10 to 12 The blade disc 20 has a first end face 21, and at least one blade mounting portion 22 is provided in the peripheral area of ​​the first end face 21. The mounting section 11 of the mowing blade 10 is connected to the blade mounting portion 22. A recess 23 is provided in the middle area of ​​the first end face 21, and a blade disc mounting portion 231 is provided in the recess 23. Along the thickness direction of the blade disc 20, the distance between the blade mounting portion 22 and the blade disc mounting portion 231 is 5mm to 10mm.

[0089] The blade mounting section 22 can specifically adopt a structure such as a through hole, bolt hole or hinge, so as to connect and fix it with the mounting section 11, so that the mowing blade 10 is connected to the blade disc 20.

[0090] The first end face 21 of the cutter head 20 is the end face close to the working surface. A recessed part 23 is provided in the middle area of ​​the first end face 21. The recessed part 23 forms a groove structure, which can increase the space between the first end face 21 of the cutter head 20 and the working surface. This ensures sufficient air intake even when the cutter head 20 is lowered to the lowest working height, and the cutter head 20 maintains good airflow movement to ensure smooth discharge of grass clippings.

[0091] The distance between the blade mounting part 22 and the cutter head mounting part 231 is also the depth of the recess 23. Setting the distance to 5mm to 10mm ensures that the recess 23 has an appropriate depth, which can ensure that when the cutter head 20 is at its lowest working height, there is a sufficient gap between the recess 23 and the ground, effectively compensating for insufficient air intake and ensuring the air speed during the cutting process.

[0092] The spacing can be 6mm, 7mm, 8mm, or 9mm, etc. This achieves the function of air intake compensation without excessively weakening the structural strength of the cutter disc 20, thus ensuring the service life and safety of the cutter disc 20.

[0093] In some embodiments, the peripheral region of the first end face 21 is further provided with at least one clearance recess 24, which is used to provide clearance space for the raised portion (such as the secondary cutting blade 1312) of the mowing blade 10 when the mowing blade 10 rotates relative to the cutter head 20.

[0094] The raised part of the lawn mower blade 10 refers to the structure of the lawn mower blade that is curved or bent upwards, such as the lawn mower blade 10 being designed with a bent or arc-shaped raised blade; it can also refer to the part of the lawn mower blade 10 that is raised when it is installed at an angle.

[0095] For example, in Figure 1 In the illustrated embodiment, the secondary cutting edge 1312 of the mowing blade 10 is a protrusion structure formed by bending and extending from the cutting body 131. This upwardly curved secondary cutting edge 1312 is the curved portion of the mowing blade 10. When the mowing blade 10 is rotatably connected to the blade disc 20, since the secondary cutting edge 1312 is curved upward relative to the cutting body 131, if the rotation axis of the mowing blade 10 is tilted relative to the rotation axis of the blade disc 20, the secondary cutting edge 1312 is prone to mechanical interference with the blade disc 20. The clearance recess 24 can provide clearance space for the secondary cutting edge 1312.

[0096] The clearance recess 24 may be adjacent to the blade mounting portion 22, or the blade mounting portion 22 may protrude from the clearance recess 24. When the mowing blade 10 rotates relative to the blade disc 20, the clearance recess 24 provides clearance space for the raised portion of the mowing blade 10, preventing a rigid collision between the mowing blade 10 (generally the cutting section 13) and the blade disc 20. This design effectively reduces mechanical interference, vibration, and noise. The number of clearance recesses 24 may match the number of mowing blades 10. In some embodiments, such as Figure 11 It is provided with three clearance recesses 24, which are arranged alternately with three blade mounting parts 22 to provide clearance space for the three mowing blades 10 respectively.

[0097] Please refer to some embodiments of this application. Figures 10 to 12 The first end face 21 of the blade 20 is also provided with at least one limiting structure 25. The limiting structure 25 is provided with at least one limiting part 251, which is used to limit the rotation angle of the grass cutting blade 10.

[0098] The limiting structure 25 is a solid structure protruding from the first end face 21 of the cutter head 20, which can form a mechanical block. The limiting structure 25 can be connected to the first end face 21 separately, or it can be integrally formed with the cutter head 20, or it can be stamped on the cutter head 20.

[0099] The limiting structure 25 limits the rotation angle of the mowing blade 10 by setting the limiting part 251. The limiting part 251 can be a boss, a stop or a stepped surface, etc.

[0100] When the mowing blade 10 rotates relative to the blade disc 20, the limiting part 251 contacts a specific part of the mowing blade 10, limiting the rotation angle of the mowing blade 10. That is, during the start-stop phase of the mowing blade 10 or when it collides with an external object, the limiting part 251 can prevent the mowing blade 10 from continuing to rotate through physical contact, thus preventing blade breakage.

[0101] This design ensures that the rotation of the mowing blade 10 is always within a controllable space, maintaining a stable dynamic gap between the mowing blade 10 and the cutter head 20, as well as between multiple mowing blades 10, thereby guaranteeing the smoothness and reliability of the equipment during cutting operations.

[0102] Please refer to some embodiments of this application. Figures 10 to 12 The blade mounting part 22 is provided with a connecting hole 221 for connecting with the mowing blade 10; the distance between the limiting structure 25 and the periphery of the blade disc 20 is greater than the distance between the connecting hole 221 and the periphery of the blade disc 20 (i.e., the limiting structure 25 is located at...). Figure 12 (Inside the dotted circle).

[0103] It should be noted that the distance between the limiting structure 25 and the periphery of the cutter head 20 refers to the shortest distance from the limiting structure 25 to the periphery of the cutter head 20 along the radial direction of the cutter head 20; the distance between the connecting hole 221 and the periphery of the cutter head 20 refers to the shortest distance from the center of the connecting hole 221 to the periphery of the cutter head 20 along the radial direction of the cutter head 20.

[0104] The connecting hole 221 is fixed to the mowing blade 10 by fasteners (such as bolts or connecting shafts), and the position of the connecting hole 221 determines the rotation trajectory of the mowing blade 10 after installation. After the mowing blade 10 is installed through the connecting hole 221, the mowing blade 10 forms an arc-shaped path centered on the connecting hole 221 during rotation.

[0105] The distance between the limiting structure 25 and the periphery of the cutter head 20 is set to be greater than the distance between the connecting hole 221 and the periphery. The root of the mowing blade 10 (installation section 11 or transition section 12) first contacts the limiting structure 25, and is then restricted in its rotation angle. This avoids the cutting section 13 of the mowing blade 10 from rigidly colliding with the limiting structure 25, thereby protecting the cutting section 13 of the mowing blade 10 and improving its service life.

[0106] In some embodiments of this application, the limiting structure 25 is provided with at least one limiting part 251, which can be used to limit the rotation angle of the mowing blade 10. The distance between the limiting part 251 and the periphery of the blade disc 20 is greater than the distance between the connecting hole 221 and the periphery of the blade disc 20.

[0107] It should be noted that the limiting part 251 refers to the part used to abut against the mowing blade 10; the distance between the limiting part 251 and the periphery of the cutter head 20 refers to the shortest distance from the limiting part 251 to the periphery of the cutter head 20 along the radial direction of the cutter head 20.

[0108] Because the distance between the limiting part 251 and the periphery of the cutter head 20 is greater than the distance between the connecting hole 221 and the periphery of the cutter head 20, when the mowing blade 10 rotates excessively due to inertia or collision, the root of the mowing blade 10 (installation section 11 or transition section 12) will first contact the limiting part 251, thereby limiting its rotation angle. This prevents the cutting section 13 of the mowing blade 10 from rigidly colliding with the limiting part 251, thus protecting the cutting section 13 of the mowing blade 10 and improving its service life. At this time, it is only necessary to ensure that the distance between the limiting part 251 of the limiting structure 25 and the periphery of the cutter head 20 is greater than the distance between the connecting hole 221 and the periphery of the cutter head 20; the position of other structures of the limiting structure 25 is not restricted.

[0109] Please refer to some embodiments of this application. Figure 11 and Figure 12The first end face 21 of the blade disc 20 is provided with a first blade mounting portion 22a and a second blade mounting portion 22b. The limiting structure 25 is located between the first blade mounting portion 22a and the second blade mounting portion 22b. The limiting structure 25 is provided with a first limiting portion 25a and a second limiting portion 25b. The first limiting portion 25a is used to limit the stroke of the mowing blade 10 connected to the first blade mounting portion 22a in the first rotation direction. The second limiting portion 25b is used to limit the stroke of the mowing blade 10 connected to the second blade mounting portion 22b in the second rotation direction.

[0110] When the mowing blade 10 connected to the first blade mounting part 22a swings in the first rotation direction, the mowing blade 10 contacts the first limiting part 25a, preventing the blade from continuing to rotate in that direction; when the mowing blade 10 connected to the second blade mounting part 22b swings in the second rotation direction, the mowing blade 10 contacts the second limiting part 25b, thereby restricting the mowing blade 10 from continuing to rotate. The rotation range of the mowing blade 10 is limited within a reasonable range to avoid blade breakage.

[0111] The number of blade mounting portions 22 can be correspondingly set with the number of limiting structures 25. In some embodiments, such as Figure 12 Three blade mounting parts 22 are arranged at intervals along the circumference of the blade disc 20. A limiting structure 25 is provided between each pair of adjacent blade mounting parts 22. Therefore, the rotation stroke of the three mowing blades 10 can be limited by the two limiting parts 251 on each limiting structure 25, so as to ensure that the mowing blades 10 do not hit each other when starting, stopping or colliding.

[0112] By setting a single limiting structure 25 between the two blade mounting parts 22, the limiting structure 25 acts on both mowing blades 10 simultaneously, reducing the number of parts and lowering production costs.

[0113] This application provides a lawn mowing robot, including a drive mechanism and a cutting mechanism 100 as described above, with a blade disc 20 connected to the output end of the drive mechanism.

[0114] The output end of the drive mechanism is assembled with the center of the cutter head 20 via a rigid connection or keyway fit. The drive mechanism generally includes a motor, and the motor output shaft can be coaxially connected to the center of the cutter head 20 via a coupling. The rigid connection between the cutter head 20 and the drive mechanism ensures the stability of power transmission, allowing the mowing blade 10 to maintain a predetermined trajectory during cutting operations.

[0115] The cutting mechanism 100 can stay close to the ground and adapt to the terrain, ensuring that the lawn is trimmed flat and evenly. The lawn mowing robot can operate autonomously without human intervention to complete the automated lawn mowing process.

[0116] This application provides a lawnmower robot system, including a base station and a lawnmower robot as described above, wherein the base station is used at least for charging the lawnmower robot.

[0117] The base station is primarily used to provide automatic charging for the lawnmower robot and serves as its task start and end point, as well as its docking and return point. The lawnmower robot system achieves fully automated operation of lawn mowing. When the lawnmower robot completes its work or runs out of power, it can autonomously return to the base station to recharge, and then set off again to continue working once fully charged.

[0118] During operation, the lawnmower robot autonomously walks along a planned path or random pattern within the lawn and performs mowing operations. The cutting mechanism 100 can cut smoothly and efficiently, and the mowing blade 10 can cut the grass blades twice, significantly improving the degree of grass clipping. When the battery level is detected to be below the set threshold or the task is completed, the lawnmower robot automatically stops working, returns to the base station along the boundary line through the navigation system, and achieves precise docking with the base station with the help of infrared and guidance structures to complete the charging connection. The base station replenishes the robot's power, and after charging is completed, it can automatically start the next round of work or enter standby mode, thus forming a fully closed-loop, automated intelligent lawnmower system.

[0119] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lawnmower blade, characterized in that, include: The mounting section has a mounting surface; A cutting segment is connected to one end of the mounting segment. The cutting body of the cutting segment has a main cutting edge and at least one secondary cutting edge. The main cutting edge is formed on a first side of the cutting body, and the secondary cutting edge is formed on a second side of the cutting body. The second side is opposite to the first side. The secondary cutting blade is inclined relative to the mounting surface, and its height gradually increases along the direction from the first side to the second side.

2. The lawnmower blade as described in claim 1, characterized in that, The angle α between the secondary cutting edge and the mounting surface is 45°~60°.

3. The lawnmower blade as described in claim 1, characterized in that, The angle β between the secondary cutting blade and the tangential direction is 30°~50°, and the tangential direction passes through the rotation center of the mowing blade and is perpendicular to the length direction of the mowing blade.

4. The lawnmower blade as described in claim 1, characterized in that, The secondary cutting edge is a protrusion structure formed by bending and extending from the cutting body; and / or, the raised height of the secondary cutting edge relative to the mounting surface is 0~3mm.

5. The lawnmower blade as described in claim 1, characterized in that, The cutting body is planar or curved, and its height gradually increases along the direction from the first side to the second side; and / or, the distal end face of the cutting body is arc-shaped, and the distal end is the end of the cutting body away from the mounting section.

6. The lawnmower blade as described in claim 1, characterized in that, The cutting edge of the secondary cutting blade is the side of the secondary cutting blade that is close to the first side and far away from the mounting section.

7. The lawnmower blade as described in any one of claims 1 to 6, characterized in that, Multiple secondary cutting blades are provided, and the multiple secondary cutting blades are spaced apart along the length direction of the mowing blade. The height of the plurality of secondary cutting blades is the same; and / or, along the length direction from the mounting section to the cutting section, the height of the plurality of secondary cutting blades gradually increases or decreases.

8. The lawnmower blade as described in claim 7, characterized in that, The side surface of the first secondary cutting blade near the mounting section is coplanar with the side surface of the cutting section.

9. The lawnmower blade as described in any one of claims 1 to 6, characterized in that, The lawn mowing blade also includes a transition section, one end of which is connected to the mounting section, and the other end of which bends downward and extends to connect with the cutting section.

10. A cutting mechanism, characterized in that, It includes a cutting disc and at least one mowing blade as described in any one of claims 1 to 9, the mowing blade being connected to the cutting disc and extending from the circumferential edge of the cutting disc.

11. The cutting mechanism as described in claim 10, characterized in that, The blade disc has a first end face, and at least one blade mounting portion is provided in the peripheral area of ​​the first end face. The mounting section of the mowing blade is connected to the blade mounting portion. A recess is provided in the middle area of ​​the first end face, and the blade disc mounting portion is provided in the recess. Along the thickness direction of the blade disc, the distance between the blade mounting portion and the blade disc mounting portion is 5mm to 10mm.

12. The cutting mechanism as described in claim 11, characterized in that, The first end face of the blade disc is also provided with at least one limiting structure, the limiting structure having at least one limiting part, the limiting part being used to limit the rotation angle of the mowing blade.

13. The cutting mechanism as described in claim 12, characterized in that, The blade mounting part is provided with a connecting hole for connecting with the mowing blade; the distance between the limiting structure and the periphery of the blade disc is greater than the distance between the connecting hole and the periphery of the blade disc; Alternatively, the distance between the limiting part and the periphery of the cutter head is greater than the distance between the connecting hole and the periphery of the cutter head.

14. The cutting mechanism as described in claim 12, characterized in that, The first end face of the cutter head is provided with a first blade mounting part and a second blade mounting part, and the limiting structure is located between the first blade mounting part and the second blade mounting part; The limiting structure is provided with a first limiting part and a second limiting part. The first limiting part is used to limit the stroke of the mowing blade connected to the first blade mounting part in the first rotation direction, and the second limiting part is used to limit the stroke of the mowing blade connected to the second blade mounting part in the second rotation direction.

15. A lawnmower robot, characterized in that, It includes a drive mechanism and a cutting mechanism as described in any one of claims 10 to 14, wherein the cutter head is connected to the output end of the drive mechanism.

16. A lawnmower robot system, characterized in that, The system includes a base station and a lawnmower robot as described in claim 15, wherein the base station is at least used to charge the lawnmower robot.

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