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. The mowing blade comprises a mounting section, a transition section and a cutting section. The mounting section has a mounting surface. The transition section is connected to one end of the mounting section. The cutting section is connected to the other end of the transition section away from the mounting section. The cutting section has opposite first and second side edges. The first side edge is provided with a blade edge. In the direction from the first side edge to the second side edge, the cutting section is curved upward. The mowing blade provided by the application solves the technical problem of a large noise during the rotation of the mowing blade in the prior art.

Description

Technical Field

[0001] This application belongs to the field of garden equipment 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 high-speed rotating blades to cut the grass layer and achieve a smoothing effect on the lawn surface.

[0003] However, most existing lawnmower blades have a flat or simple bent structure, which can easily create a pressure difference between the front and rear during high-speed rotation, causing air vibration and turbulent airflow, resulting in significant aerodynamic noise. Utility Model Content

[0004] The purpose of this application is to provide a lawn mower blade, a cutting mechanism, a lawn mower robot and its system to solve the technical problem of excessive noise when the lawn mower blade rotates during mowing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a lawn mower blade, comprising: an installation section having an installation surface; a transition section connected to one end of the installation section; and a cutting section connected to the end of the transition section away from the installation section, the cutting section having opposing first and second sides, the first side having a blade, and the cutting section being curved upwards along the direction from the first side to the second side.

[0006] In one alternative embodiment, the height of the second side is greater than the height of the mounting surface along the normal direction of the mounting surface.

[0007] In one optional embodiment, along the normal of the mounting surface, the height difference between the first side and the mounting surface is ΔH1, and the height difference between the first side and the second side is ΔH2, where 0.7≤ΔH1 / ΔH2≤0.9.

[0008] In one alternative embodiment, the height of the cut segment relative to the mounting surface along the normal of the mounting surface ranges from 1.2 mm to 3 mm.

[0009] In one alternative embodiment, the distal end face of the cutting segment is arc-shaped, and the distal end is the end of the cutting segment furthest from the mounting segment.

[0010] In an alternative embodiment, the end of the cutting segment away from the mounting segment has a rounded corner at the corner adjacent to the second side.

[0011] In one alternative embodiment, when the mowing blade is connected to the cutter head, the center of the arc end face at the distal end of the cutting section is located at the rotation center of the cutter head; or, when the mowing blade is connected to the output shaft of the drive motor, the center of the arc end face at the distal end of the cutting section is located at the rotation center of the output shaft.

[0012] In one alternative embodiment, the size of the transition section accounts for 30% to 45% of the overall size of the mowing blade along its radial direction; and / or, the size of the transition section and the cutting section accounts for 70% to 85% of the overall size of the mowing blade.

[0013] In an alternative embodiment, in the direction extending from the mounting segment to the cutting segment, the transition segment bends downward relative to the mounting surface on the side adjacent to the first side and curves upward relative to the mounting surface on the side adjacent to the second side.

[0014] Another objective of this application is to provide a cutting mechanism, including a blade disc and a mowing blade as described above, wherein the mowing blade is connected to the blade disc and the cutting section extends beyond the periphery of the blade disc.

[0015] In one optional embodiment, the peripheral area of ​​the lower end face of the cutter head is provided with at least one blade mounting portion, and the mounting section of the mowing blade is connected to the blade mounting portion; the peripheral area of ​​the lower end face of the cutter head is also provided with at least one clearance recess, which is used to provide clearance space for the cutting section of the mowing blade when the mowing blade rotates relative to the cutter head.

[0016] In an optional embodiment, the lower end face of the cutter head is further provided with at least one limiting structure, the limiting structure having at least one limiting part, which is used to limit the rotation angle of the cutting blade when the cutting blade rotates relative to the cutter head.

[0017] 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.

[0018] In one optional embodiment, the lower 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.

[0019] 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.

[0020] 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.

[0021] 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 embodiment of this application has an arc-shaped protrusion on the cutting section, and the height of the cutting section gradually increases from the first side to the second side, forming a smooth arc-shaped surface. When running, the lower first side comes into contact with the air first, and the airflow flows smoothly backward along the arc-shaped surface of the cutting section. The airflow can pass through the blade surface more smoothly, significantly reducing the pressure difference and air turbulence between the front and rear, and reducing the aerodynamic noise caused by airflow turbulence. Attached Figure Description

[0022] 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.

[0023] Figure 1 A schematic diagram of the structure of the lawnmower blade provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of the lawnmower blade provided in the embodiments of this application. Figure 2 ; Figure 3 A schematic diagram of the structure of the lawnmower blade provided in the embodiments of this application. Figure 3 ; Figure 4 A schematic diagram of the structure of the lawnmower blade provided in the embodiments of this application. Figure 4 ; Figure 5 Schematic diagram of the cutting mechanism provided in the embodiments of this application Figure 1 ; Figure 6 Schematic diagram of the cutting mechanism provided in the embodiments of this application Figure 2 ; Figure 7 Schematic diagram of the cutting mechanism provided in the embodiments of this application Figure 3 .

[0024] The following are the labeling elements in the figure: 100-Cutting mechanism; 10-Grass mower blade; 11-Mounting section; 111-Mounting surface; 12-Transition section; 13-Cutting section; 13a-Rounded corner; 131-First side; 1311-Blade edge; 132-Second side; 133-Far end; 20-Cutter disc; 21-Lower end face; 22-Blade mounting part; 22a-First blade mounting part; 22b-First blade mounting part; 221-Connecting hole; 23-Recess; 231-Cutter disc mounting part; 24-Avoidance recess; 25-Limiting structure; 25a-First limiting part; 25b-Second limiting part; 251-Limiting part. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Please refer to the following: Figures 1 to 7The lawn mower blade 10 provided in this application embodiment will now be described. The lawn mower blade 10 includes an installation section 11, a transition section 12, and a cutting section 13. The installation section 11 has an installation surface 111; the transition section 12 is connected to one end of the installation section 11; the cutting section 13 is connected to the end of the transition section 12 away from the installation section 11, and the cutting section 13 has opposing first side 131 and second side 132. The first side 131 is provided with a blade 1311, and the cutting section 13 is arc-shaped and raised along the direction from the first side 131 to the second side 132.

[0030] Mounting section 11 is the part where the blade is connected to the cutter head 20 or the drive shaft. Specifically, it can be a plate-like structure with a flat mounting surface 111 or a block-like structure with mounting holes. The mounting surface 111 is used to ensure that the blade is stably fixed on the cutter head 20.

[0031] The transition section 12 is the middle part connecting the installation section 11 and the cutting section 13, and serves as a transition. The transition section 12 is used to transfer the supporting force of the installation section 11 to the cutting section 13. The transition section 12 can adopt a curved or inclined plate structure. For example, the transition section 12 has a gradually curved state, so that the cutting section 13 and the installation section 11 form a certain angle.

[0032] The cutting section 13 refers to the part of the blade that cuts the lawn vegetation. The first side 131 of the cutting section 13 is provided with a sharp blade 1311 for cutting the lawn. The second side 132 may be provided with a cutting blade for secondary cutting and breaking up, or it may be set as a non-cutting side.

[0033] Along the direction from the first side 131 to the second side 132, the height of the cutting section 13 gradually increases, forming a smooth arc-shaped surface, that is, curving upwards along the arc. When the lawnmower is running, the airflow enters from the lower first side 131, then flows smoothly backwards along the arc-shaped surface of the cutting section 13 to the higher second side 132 and is discharged. This design of curving upwards along the arc optimizes the airflow path by guiding the airflow smoothly along the curved surface, reducing the pressure difference between the front and rear of the blade, and reducing aerodynamic noise.

[0034] When the curved cutting section 13 rotates at high speed, it creates an upward airflow. This airflow lifts the grass blades to be cut, allowing the blade 1311 to cut them more cleanly and thoroughly, thus improving cutting efficiency and resulting in smoother, neater cuts, enhancing the overall aesthetics of the lawn. Furthermore, the improved airflow distribution helps reduce vibration of the mower blade 10, improving cutting stability and precision.

[0035] In some embodiments, the mowing blade 10 is mounted on the cutter head 20 of the mowing robot. When the mower is started, the cutter head 20 rotates at high speed, driving the mowing blade 10 to cut the lawn. The arc-shaped structure of the cutting section 13 guides the airflow to flow smoothly and can also form an upward airflow channel below the cutter head 20, which can help to discharge the grass clippings generated by cutting, so that they can be discharged more smoothly toward the outlet or grass collection frame, reducing the accumulation of grass clippings in the cutter head 20 and ensuring that the equipment works continuously and efficiently.

[0036] Compared with the prior art, the lawn mowing blade 10 provided in this application embodiment has an arc-shaped protrusion on the cutting section 13. The height of the cutting section 13 gradually increases along the direction from the first side 131 to the second side 132, forming a smooth arc-shaped surface. During operation, the lower first side 131 comes into contact with the air first, and the airflow flows smoothly backward along the arc-shaped surface of the cutting section 13. The airflow can pass through the blade surface more smoothly, significantly reducing the pressure difference and air turbulence between the front and rear, and reducing the aerodynamic noise caused by airflow turbulence.

[0037] Please refer to some embodiments of this application. Figure 2 Along the normal X direction of the mounting surface 111, the height of the second side 132 is greater than the height of the mounting surface 111.

[0038] The normal direction of the mounting surface 111 is the direction perpendicular to the mounting surface 111. In this direction, the position of the second side 132 is higher than the position of the mounting surface 111.

[0039] When the second side 132 is a straight edge and the straight line is parallel to the mounting surface 111, its height is the distance from any point on the straight line along the normal to the mounting surface 111; when the second side 132 is an oblique line or a curve, its height is the vertical height corresponding to the point on the second side 132 that is farthest from the mounting surface 111.

[0040] The second side 132 is higher than the mounting surface 111. As the highest point of the airflow channel, the second side 132 guides the airflow to generate an upward lifting force, forming an upward airflow channel when the mowing blade 10 rotates. The lifting airflow can lift the grass blades to be cut for better cutting. At the same time, it can transport the grass clippings generated by cutting along the arc-shaped surface to the outside of the blade disc 20, preventing grass clippings from accumulating inside the blade disc 20, maintaining the pressure balance between the upper and lower surfaces of the blade, and reducing the noise generated when the blade is running.

[0041] Please refer to some embodiments of this application. Figure 2 Along the normal direction of the mounting surface 111, the height difference between the first side 131 and the mounting surface 111 is ΔH1, and the height difference between the first side 131 and the second side 132 is ΔH2, where 0.7≤ΔH1 / ΔH2≤0.9.

[0042] ΔH1 is the vertical height difference between the first side 131 of the cutting section 13 and the mounting surface 111. This height difference determines the initial lift of the front airflow. ΔH2 is the vertical height difference between the second side 132 of the cutting section 13 and the first side 131. It is used to control the lift of the airflow on the surface of the cutting section 13.

[0043] When ΔH1 / ΔH2 is in the range of 0.7 to 0.9, this ratio, combined with the arc-shaped raised structure of the cutting section 13, creates a continuous and gradually increasing airflow gradient along the first side 131 to the second side 132. This effectively guides the airflow smoothly along the arc-shaped surface of the cutting section 13, further reducing the pressure difference between the front and rear of the blade and making the pressure distribution more uniform. This further reduces aerodynamic noise caused by airflow impact and turbulence. Simultaneously, it also creates a more ideal upward airflow channel below the cutter head 20, facilitating smoother discharge of grass clippings.

[0044] Please refer to some embodiments of this application. Figures 1 to 3 Along the normal direction of the mounting surface 111, the height of the cut segment 13 relative to the mounting surface 111 (ΔH2-ΔH1) ranges from 1.2mm to 3mm.

[0045] The height of the cutting section 13 is within the range of 1.2mm to 3mm, which ensures the airflow guidance effect while avoiding the decrease in blade rigidity or the increase in cutting resistance due to excessive height.

[0046] In some embodiments, the height of the cutting section 13 relative to the mounting surface 111 can be set to 2mm, so that the cutting section 13 can form an appropriate airflow channel during rotation, which can effectively cut the lawn without excessively affecting the overall structural stability of the blade.

[0047] This adjustable height range allows the cutting section 13 to maintain a suitable airflow channel while ensuring cutting performance, thus minimizing the pressure difference between the front and rear of the blade and resulting in a more uniform pressure distribution. This, in turn, reduces aerodynamic noise caused by airflow impact and turbulence.

[0048] Please refer to some embodiments of this application. Figure 4 The distal end 133 of the cutting segment 13 has an arc-shaped end face, and the distal end 133 is the end of the cutting segment 13 that is far away from the mounting segment 11.

[0049] 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 133 end face can be processed by machining or molding. The arc shape of the distal end 133 end face can extend to the entire width of the cut segment 13, or it can only cover a portion of the width.

[0050] 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 133 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.

[0051] Please refer to some embodiments of this application. Figures 1 to 4 The end of the cutting section 13 away from the mounting section 11 has a rounded corner 13a at the corner adjacent to the second side 132.

[0052] A fillet 13a is provided at the corner region of the second side 132 at the end of the cutting section 13. The radius of the fillet 13a can be set according to the actual blade size. In some embodiments, it can be set to 1 mm or 2 mm, etc.

[0053] When the blade rotates at high speed, the airflow is easily separated at sharp corners, forming turbulent eddies and pressure fluctuations, which in turn generate aerodynamic noise. However, by setting the fillet 13a, the originally sharp right angle or acute angle can be transformed into a smooth curved surface, allowing the airflow to pass around the blade tip more smoothly, effectively suppressing airflow separation and eddy generation, thereby reducing the overall noise level of the equipment during operation.

[0054] Furthermore, the 13a fillet design, through a smooth transition geometry, can disperse local stress, improve the fatigue resistance and structural reliability of this location, extend the service life of the cutting tool, and ensure safe use.

[0055] During operation, the smooth, rounded surface of the 13a reduces the likelihood of grass clippings getting caught or accumulating at the blade tip. As the grass clippings pass through the rounded surface, they flow more smoothly under the influence of airflow, reducing the risk of tangling and clogging, and ensuring unobstructed grass discharge. Furthermore, the rounded surface eliminates sharp edges, reducing the risk of scratches from accidental contact and improving product safety.

[0056] In some embodiments of this application, when the mowing blade 10 is connected to the blade disc 20, the center of the arc end face of the distal end 133 of the cutting segment 13 is located at the rotation center of the blade disc 20.

[0057] In some embodiments of this application, when the lawn mower blade 10 is connected to the output shaft of the drive motor, the center of the arc end face of the distal end 133 of the cutting segment 13 is located at the rotation center of the output shaft.

[0058] The center of the arc end face coincides with the rotation center of the cutter head 20 or the output shaft. That is, all points of the far end 133 of the mowing blade 10 are located in the same horizontal circumferential plane when rotating at high speed. The edge of the mowing blade 10 can form a flat and stable cutting plane when rotating.

[0059] This design creates a continuous and uniform airflow when the outer edge of the blade comes into contact with the air, reducing local turbulence caused by the mismatch between the end face shape and the rotation trajectory, thereby reducing aerodynamic noise.

[0060] Meanwhile, the coincidence of the arc end face with the rotation center of the cutter head 20 or the output shaft makes the centrifugal force generated when the blade rotates more evenly, realizes the balance of the cutting section 13 during the rotation process, avoids equipment vibration caused by eccentricity, improves the stability of operation, and extends the service life of the equipment.

[0061] Please refer to some embodiments of this application. Figure 4 Along the radial direction Y of the mowing blade 10, the size L1 of the transition section 12 accounts for 30% to 45% of the overall size L2 of the mowing blade 10.

[0062] The radial direction of the lawn mower blade 10 refers to the direction in which it extends outward from its center of rotation, that is, the length direction of the blade from the mounting section 11 to the distal end 133.

[0063] By limiting the size ratio of the transition section 12 to a range of 30% to 45%, a longer transition section 12 can be ensured. The extended transition section 12 makes the transition from the mounting surface 111 to the cutting section 13 smoother. This smooth transition can effectively guide the airflow, reduce air separation and vortex generation, thereby weakening the pressure difference between the upper and lower surfaces of the blade and reducing the generation of aerodynamic noise.

[0064] Meanwhile, the extended transition section 12 prolongs the load transmission path, allowing cutting impact forces to be distributed more evenly and smoothly from the mounting section 11 to the cutting section 13, significantly reducing local stress, improving the overall fatigue resistance and service life of the blade, and enhancing operational safety.

[0065] Please refer to some embodiments of this application. Figure 4 The size L3 of the transition section 12 and the cutting section 13 accounts for 70% to 85% of the overall size L3 of the mowing blade 10.

[0066] By making the transition section 12 and the cutting section 13 occupy 70% to 85% of the total length, the effective length of the blade can be significantly expanded, allowing it to cover a larger cutting radius. The cutting circle formed by the rotation of the blade is larger, which can reduce missed cuts and improve mowing efficiency.

[0067] Meanwhile, the longer transition section 12 and cutting section 13 provide a longer airflow path and a larger curved surface area, which can more effectively guide and accelerate the air, forming a stronger and more stable airflow during high-speed rotation. This increases the number of grass blades cut in a single operation and the grass removal capacity, thereby improving work efficiency. This ratio ensures that the functional area of ​​the blade is maximized while still retaining a sufficiently strong mounting section 11, achieving a balance between connection strength and working performance.

[0068] Please refer to some embodiments of this application. Figure 1 and Figure 3 In the direction extending from the mounting section 11 to the cutting section 13 (i.e., the radial direction Y of the mowing blade), the transition section 12 bends downward relative to the mounting surface 111 on the side adjacent to the first side 131 and curves upward relative to the mounting surface 111 on the side adjacent to the second side 132.

[0069] Transition segment 12 itself can also be configured with a gently transitioning curved surface to guide airflow. Please refer to [link / reference]. Figure 1 The transition section 12 bends downwards on the side near the first side 131, serving as an airflow inlet to smoothly introduce air from near the ground; it curves upwards on the side near the second side 132, forming a lift surface for the airflow. During rotation, it actively guides the air upwards, generating negative pressure and effectively straightening the grass blades. These two elements work together to create a highly efficient airflow circulation, enhancing the overall grass lifting and unloading capabilities.

[0070] Furthermore, the twisted design of the transition section 12, with one side (the side closer to the first side 131) pointing downwards and the other side (the side closer to the second side 132) pointing upwards, makes the pressure change of the airflow more gradual and gentle when passing through the transition section 12, effectively suppressing airflow separation and vortex generation, thereby weakening pressure fluctuations and vibrations, and significantly reducing high-frequency aerodynamic noise during mowing.

[0071] In addition, the twisted design can enhance structural rigidity and resistance to deformation, better resist centrifugal force and cutting impact during high-speed rotation, reduce vibration, and improve the dynamic stability and service life of the blade.

[0072] Please see Figures 1 to 7 This application provides a cutting mechanism 100, including a blade disc 20 and a mowing blade 10 as described above. The mowing blade 10 is connected to the blade disc 20, and the cutting section 13 extends beyond the periphery of the blade disc 20.

[0073] The mounting section 11 of the lawn mower blade 10 is fixed 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.

[0074] 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 hinge structure, forming a swivel blade. The lawn mowing blade 10 is independently mounted on the blade mounting part 22, which facilitates disassembly, replacement and maintenance.

[0075] 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.

[0076] Please refer to some embodiments of this application. Figures 5 to 7 The lower end face 21 (i.e. the end face facing the working surface) of the cutter head 20 is provided with at least one blade mounting part 22 in the peripheral area, and the mounting section 11 of the mowing blade 10 is connected to the blade mounting part 22; the lower end face 21 of the cutter head 20 is also provided with at least one clearance recess 24 in the peripheral area, which is used to provide clearance space for the cutting section 13 of the mowing blade 10 when the mowing blade 10 rotates relative to the cutter head 20.

[0077] The blade mounting section 22 can specifically adopt a structure such as a through hole, bolt hole, or hinge to connect and fix it to the mounting section 11, so that the mowing blade 10 is connected to the blade disc 20. The number of blade mounting sections 22 can match the number of mowing blades 10; two, three, or more can be provided. In some embodiments, three blade mounting sections 22 are provided (e.g., Figure 6 As shown), the three lawn mowing blades 10 are respectively connected to the three blade mounting parts 22.

[0078] The lower end face 21 has a relief recess 24 on its periphery to avoid the cutting section 13 of the mowing blade 10. Since the cutting section 13 of the mowing blade 10 has an arc-shaped protrusion, the relief recess 24 provides clearance space for the cutting section 13 of the mowing blade 10, which can prevent the cutting section 13 from rigidly colliding with the blade disc 20. This design effectively reduces mechanical interference, vibration and noise.

[0079] The avoidance recess 24 can be a groove or pit, a notch, an inclined surface or a stepped surface, etc., as long as it can avoid the cutting section 13 of the lawn mower blade 10.

[0080] In addition, the clearance recess 24 can be arranged adjacent to the blade mounting part 22, or the blade mounting part 22 can be protruding into the clearance recess 24.

[0081] The number of clearance recesses 24 can be matched with the number of mowing blades 10. In some embodiments, such as Figures 6 to 7 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.

[0082] Please refer to some embodiments of this application. Figures 5 to 7 A recessed portion 23 is provided in the middle area of ​​the lower end face 21 of the cutter head 20, and a cutter head mounting portion 231 is provided in the recessed portion 23.

[0083] The cutter head 20 can be connected to the drive device (not shown) via the cutter head mounting part 231 to drive the entire cutting mechanism 100 to rotate.

[0084] A recessed portion 23 is provided on the lower end face 21, forming a groove structure, which can increase the space between the lower end face 21 of the cutter head 20 and the ground, so that even when the cutter head 20 is lowered to the lowest working height, sufficient air intake can be guaranteed, the cutter head 20 maintains good airflow movement, and ensures smooth discharge of grass clippings.

[0085] The synergistic effect of the recessed portion 23 and the avoidance recessed portion 24 allows airflow to enter the recessed portion 23 through the avoidance recessed portion 24. This solves the air intake problem at low working heights, ensures wind speed, and avoids noise problems caused by the collision between the grass cutting blade 10 and the blade disc 20, thereby improving the operational stability and work efficiency of the cutting mechanism 100.

[0086] Please refer to some embodiments of this application. Figure 6 The lower end face 21 of the blade disc 20 is also provided with at least one limiting structure 25. The limiting structure 25 is provided with at least one limiting part 251. When the mowing blade 10 rotates relative to the blade disc 20, the limiting part 251 is used to limit the rotation angle of the mowing blade 10.

[0087] The limiting structure 25 is a solid structure protruding from the lower end face 21 of the cutter head 20, which can form a mechanical obstruction. When the mowing blade 10 rotates relative to the cutter head 20, the limiting part 251 on the limiting structure 25 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.

[0088] The limiting structure 25 can be connected separately to the lower end face 21, or it can be integrally formed with the cutter head 20, or it can be stamped on the cutter head 20. The limiting part 251 can be a boss, a stop, or a stepped surface, etc.

[0089] 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.

[0090] Please refer to some embodiments of this application. Figure 7The 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 7 (Inside the circle with the middle dashed line).

[0091] 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 main body 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.

[0092] 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.

[0093] By setting the distance between the limiting structure 25 and the periphery of the cutter head 20 to be greater than the distance between the connecting hole 221 and the periphery of the cutter head 20, the mounting section 11 of the mowing blade 10 will first contact the limiting structure 25, thereby limiting its rotation angle and preventing the cutting section 13 of the mowing blade 10 from rigidly colliding with the limiting structure 25, thus protecting the blade 1311 of the cutting section 13 and improving its service life.

[0094] Please refer to some embodiments of this application. Figure 6 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 (that is, the limiting part 251 is located at the periphery of the blade disc 20). Figure 7 (Inside the circle with the middle dashed line).

[0095] It should be noted that the limiting part 251 refers to the part used to abut against the mowing blade 10, and 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.

[0096] 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 mounting section 11 of the mowing blade 10 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 mechanism 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 mechanism is not restricted.

[0097] By controlling the distance between the limiting structure 25 (or the limiting part 251) and the periphery of the cutter head 20, it is ensured that the installation section 11 of the mowing blade 10 is limited by the rotation angle of the limiting structure 25. At the same time, the cutting section 13 of the mowing blade 10 can cut normally in the other direction at the maximum deflection angle without being affected by the limiting structure 25. This improves the coordination between the mowing blade 10 and the limiting structure 25 during the cutting operation and increases the service life of the mowing blade 10.

[0098] Please refer to some embodiments of this application. Figure 7 The lower 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.

[0099] 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.

[0100] The number of blade mounting portions 22 can be correspondingly set with the number of limiting structures 25. In some embodiments, such as Figure 7 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] During operation, the lawnmower robot autonomously walks along a planned path or in a random pattern to perform lawn mowing. The cutting mechanism 100 can cut smoothly and efficiently with low noise. When the battery level is detected to be below the set threshold or the task is completed, the lawnmower robot automatically stops working and returns to the base station along the boundary line through the navigation system. It then uses infrared and guidance structures to accurately dock with the base station and complete the charging connection. The base station replenishes the robot's power. 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.

[0108] 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 transition section is connected to one end of the mounting section; as well as A cutting segment is connected to the end of the transition segment away from the mounting segment. The cutting segment has opposing first and second sides. The first side is provided with a cutting edge. Along the direction from the first side to the second side, the cutting segment is curved upwards.

2. The lawnmower blade as described in claim 1, characterized in that, Along the normal of the mounting surface, the height of the second side is greater than the height of the mounting surface.

3. The lawnmower blade as described in claim 2, characterized in that, Along the normal of the mounting surface, the height difference between the first side and the mounting surface is ΔH1, and the height difference between the first side and the second side is ΔH2, where 0.7 ≤ ΔH1 / ΔH2 ≤ 0.

9.

4. The lawnmower blade as described in claim 2, characterized in that, Along the normal of the mounting surface, the height of the cut segment relative to the mounting surface ranges from 1.2mm to 3mm.

5. The lawnmower blade as described in claim 1, characterized in that, The distal end face of the cutting segment is arc-shaped, and the distal end is the end of the cutting segment that is away from the mounting segment.

6. The lawnmower blade as described in claim 1, characterized in that, The end of the cutting segment away from the mounting segment has a rounded corner near the second side.

7. The lawnmower blade as described in claim 5, characterized in that, When the mowing blade is connected to the blade disc, the center of the arc-shaped end face at the distal end of the cutting section is located at the rotation center of the blade disc; or, when the mowing blade is connected to the output shaft of the drive motor, the center of the arc-shaped end face at the distal end of the cutting section is located at the rotation center of the output shaft.

8. The lawnmower blade as described in any one of claims 1 to 7, characterized in that, Along the radial direction of the mowing blade, the size of the transition section accounts for 30% to 45% of the overall size of the mowing blade; and / or, the size of the transition section and the cutting section accounts for 70% to 85% of the overall size of the mowing blade.

9. The lawnmower blade as described in any one of claims 1 to 7, characterized in that, In the direction extending from the mounting section to the cutting section, the transition section bends downward relative to the mounting surface on the side adjacent to the first side and curves upward relative to the mounting surface on the side adjacent to the second side.

10. A cutting mechanism, characterized in that, It includes a blade disc and a mowing blade as described in any one of claims 1 to 9, the mowing blade being connected to the blade disc and the cutting section extending beyond the periphery of the blade disc.

11. The cutting mechanism as described in claim 10, characterized in that, At least one blade mounting portion is provided in the peripheral area of ​​the lower end face of the blade disc, and the mounting section of the mowing blade is connected to the blade mounting portion; The peripheral area of ​​the lower end face of the cutter head is also provided with at least one clearance recess, which is used to provide clearance space for the cutting section of the cutting blade when the cutting blade rotates relative to the cutter head.

12. The cutting mechanism as described in claim 11, characterized in that, The lower end face of the cutter disc is also provided with at least one limiting structure. The limiting structure has at least one limiting part. When the mowing blade rotates relative to the cutter disc, the limiting part is 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 lower 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 lawnmowing 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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