Smart mower

Abstract

The present disclosure relates to a kind of intelligent mower, it includes body, mobile device, cutting device and control device.Cutting module of cutting device includes cutterhead, cutting piece, guard disk, bearing assembly;The central part of the guard disk of intelligent mower is at least partially below bearing assembly, central part continuously extends, so that effectively avoid grass clippings from the central part of guard disk into bearing assembly, ensure the normal work of bearing assembly, so that intelligent mower can not be driven to rotate when cutting work is carried out, so that effectively reduce the frictional resistance of lawn to rotating cutterhead and the energy loss caused by it, reduce the cutting energy consumption, simultaneously, the edge portion of guard disk is bent towards the side where cutterhead is, when intelligent mower carries out lower cutting height, the part of guard disk that contacts ground is gentle, not easy to cut into ground, can satisfy the demand of lower cutting height.

Description

[0001] This application claims priority to Chinese patent application No. CN202421556530.X, filed on July 3, 2024, the entire contents of which are incorporated herein by reference.

[0002] This application claims priority to Chinese patent application No. CN202422667883.3, filed on November 1, 2024, the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Chinese patent application No. CN202422667994.4, filed on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0004] This disclosure relates to the field of lawnmower technology, specifically to an intelligent lawnmower. Background Technology

[0005] Intelligent lawnmowers, which move automatically in gardens to complete the cutting work, are widely used in lawn mowing. In existing technology, intelligent lawnmowers have a freely sliding protective disc on the cutting head, located below the cutting disc. This disc is designed to withstand impacts from various objects in the working area, preventing the cutting disc from directly contacting obstacles and protecting the cutting element, including the cutting disc. Simultaneously, the protective disc reduces friction between the cutting disc and the lawn, lowering overall power consumption and thus improving cutting efficiency. However, the presence of the protective disc means that the cutting element is quite far from the ground even at its lowest point, potentially making the cutting height insufficient for applications requiring a lower cutting height. Utility Model Content

[0006] The purpose of this disclosure is to provide a smart lawnmower that can achieve lower cutting height and lower cutting energy consumption.

[0007] To achieve the aforementioned objectives, this disclosure provides an intelligent lawnmower, comprising:

[0008] body;

[0009] A mobile device is mounted on the machine body to support and drive the machine body to move within the working area;

[0010] The cutting device includes a drive module disposed on the machine body and a cutting module disposed at the bottom of the machine body, wherein the cutting module rotates around its own axis under the drive of the drive module.

[0011] A control device, mounted on the machine body, is signal-connected to the moving device and the cutting device to control the automatic movement and automatic operation of the intelligent lawnmower;

[0012] The cutting module includes:

[0013] The cutter head is rotatably mounted on the machine body;

[0014] The cutting component is mounted on the cutter head and rotates synchronously with the cutter head;

[0015] A protective disc is located on the side of the cutter head away from the machine body, and the protective disc rotates relative to the cutter head via a bearing assembly;

[0016] The central portion of the protective disc is at least partially located below the bearing assembly, the central portion extends continuously, the flat portion of the protective disc is located on the outer periphery of the central portion, one end of the edge portion of the protective disc is connected to the flat portion, and the other end is bent toward the side where the cutter head is located.

[0017] As a further improvement of this disclosure, the distance between the cutting element and the lowest surface of the protective disc along the axial direction of the cutter head is less than or equal to 20 mm.

[0018] As a further improvement of this disclosure, along the axial direction of the cutter head, the lowest surface of the central portion is at least 1 mm below the lowest surface of the flat plate portion.

[0019] As a further improvement of this disclosure, along the axial direction of the cutter head, the lowest surface of the central portion of the protective disc is not lower than the lowest surface of the flat plate portion; a mounting portion is provided between the central portion and the flat plate portion, the mounting portion is provided with a mounting hole, the mounting hole and the mounting member cooperate to connect the protective disc to the cutter head, and along the axial direction of the cutter head, the lowest surface of the mounting member is not lower than the lowest surface of the flat plate portion.

[0020] As a further improvement of this disclosure, along the axial direction of the cutter head, the central portion is recessed toward the side away from the cutter head to form a receiving cavity, and the bearing assembly is at least partially located within the receiving cavity.

[0021] As a further improvement to this disclosure, the protective disc is a one-piece structure.

[0022] As a further improvement to this disclosure, the protective plate is a metal plate.

[0023] As a further improvement of this disclosure, the cutting module further includes a first connector mounted on the cutter head and a second connector connected to the protective disc, the bearing assembly being disposed between the first connector and the second connector; the first connector includes a first body and an extension extending from the first body toward the protective disc; the second connector includes a second body and a protrusion extending from the second body toward the cutter head; on a projection plane along the radial direction of the cutter head, the projection of the protrusion and the projection of the extension at least partially overlap.

[0024] As a further improvement of this disclosure, the projection along the radial direction of the cutter head shows that the length of the overlap between the protrusion and the extension is greater than the shortest distance between the first body and the second body.

[0025] As a further improvement of this disclosure, one of the first connector and the second connector has a protrusion, and the other of the first connector and the second connector has a receiving groove for receiving at least a portion of the protrusion.

[0026] As a further improvement of this disclosure, a seal is provided between the first connector and the second connector to prevent foreign objects from entering the bearing assembly.

[0027] The beneficial effects of this disclosure are: the central part of the protective disc of the intelligent lawnmower is at least partially located below the bearing assembly, and the central part extends continuously, thereby effectively preventing grass clippings from entering the bearing assembly from the central part of the protective disc, ensuring the normal operation of the bearing assembly. This allows the protective disc to remain stationary during the cutting operation of the intelligent lawnmower, effectively reducing the frictional resistance of the lawn against the rotating blade and the resulting energy loss, thus reducing cutting energy consumption. At the same time, the edge of the protective disc is curved towards the side where the blade is located, so when the intelligent lawnmower is cutting at a lower height, the part of the protective disc in contact with the ground is gentle, making it less likely to cut into the ground, which can meet the requirements of a lower cutting height. Attached Figure Description

[0028] Figure 1 This is a cross-sectional schematic diagram of a cutting device in the prior art.

[0029] Figure 2 This is a schematic diagram of the structure of an intelligent lawnmower shown in one embodiment of the present disclosure.

[0030] Figure 3 for Figure 2 A cross-sectional schematic diagram of a portion of the structure of the cutting device shown.

[0031] Figure 4 for Figure 2 The diagram shows the structure of the cutting module.

[0032] Figure 5 for Figure 2 The diagram shows a cross-sectional view of the cutting module.

[0033] Figure 6 for Figure 2 Another structural diagram of the cutting module shown.

[0034] Figure 7 for Figure 2 The diagram shows a cross-sectional view of the protective disc.

[0035] Figure 8 for Figure 2 The diagram shows a cross-sectional view of a portion of the structure of the cutting module.

[0036] Figure 9 for Figure 2 An exploded view of a portion of the structure of the cutting module shown.

[0037] Figure 10 This is a cross-sectional schematic diagram of a portion of the structure of an intelligent lawnmower according to an embodiment of the present disclosure.

[0038] Among them, the Smart Lawn Mower-100;

[0039] Fuselage-1;

[0040] Mobile device-2; Drive wheel-21;

[0041] Cutting device-3; Drive module-31; Output end-32;

[0042] Cutting module-4; cutter head-41; receiving cavity-411; first limiting member-412;

[0043] First screw - 42; Cutting part - 43; Second screw - 44;

[0044] Protective disc - 45; Central section - 451; Receiving cavity - 4511; Flat plate section - 452; Edge section - 453; Mounting section - 454; Annular recessed ring - 4541; Mounting hole - 455; Mounting component - 456; Rod section - 4561; End section - 4562; Third limiting component - 457; Extension section - 458;

[0045] Bearing assembly - 46; First bearing - 461; Second bearing - 462; Washer - 463; Seal - 464;

[0046] First connector-47; First body-471; Docking part-472; Extension part-473; Second limiting member-474; Receiving groove-475;

[0047] Second connector - 48; Second body - 481; First groove - 482; Second groove - 483; Ring platform - 484; Docking hole - 485; Fourth limiting member - 486; Protrusion - 487; Raised part - 488;

[0048] Locking screw-49; Washer-491;

[0049] Control device-5. Detailed Implementation

[0050] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.

[0051] In the description of this disclosure, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure.

[0052] Furthermore, where the terms "first" and "second" appear, these terms are 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 at least one of that feature. In the description of this disclosure, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0054] In this disclosure, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this disclosure are for illustrative purposes only and do not represent the only possible implementation.

[0056] Please see Figure 1In existing technologies, during operation, the bottom of the blade disc of a smart lawnmower directly contacts the lawn. The lawn generates significant frictional resistance against the high-speed rotating blade disc, increasing the load on the disc and potentially causing it to stall and stop. Furthermore, grass clippings generated during cutting can easily enter the cutting device and accumulate between the blade disc and the cutting element, further increasing the cutting load and causing the blade disc and cutting element to stop rotating, resulting in jamming. Current smart lawnmowers have poor dense grass cutting capabilities and high cutting energy consumption. Additionally, the fastening screws on the blade disc are prone to wear and loosening after colliding with fixed obstacles on the lawn, such as stones, causing the cutting element to detach from the blade disc, posing a safety hazard. While a protective disc is installed at the bottom of the blade disc to address these issues, its presence means that the cutting element is still quite far from the ground at its lowest point, potentially insufficient for achieving lower cutting heights. Furthermore, the protective disc needs to be connected to the cutter head via a bearing assembly to allow for free sliding. The bearing assembly is fitted onto the rotation axis of the cutter head. An opening is located on the lower part of the protective disc below the bearing assembly to facilitate quick disassembly of the cutting device containing the cutter head, thus facilitating maintenance. However, grass clippings can easily enter the bearing assembly through this opening, causing it to fail. This results in the protective disc rotating with the cutter head, meaning the protective disc fails, thus preventing the reduction of the smart lawnmower's power consumption. Even if a blocking element is installed at the opening of the protective disc, grass clippings can easily pass through the gap between the blocking element and the protective disc and enter the bearing assembly, causing the protective disc to fail as well.

[0057] When smart lawnmowers are used in commercial settings, such as golf courses, the quality of the lawn is important, and the lawn needs to be able to cut at a low height. At the same time, uneven areas on the ground in commercial settings are particularly prominent. Smart lawnmowers must avoid damaging the lawn and avoid the need for high power consumption due to the failure of the protective disc.

[0058] For this purpose, please see Figure 2 and Figure 3 The intelligent lawnmower 100 shown in one embodiment of this disclosure can be a ride-on lawnmower, a stand-up lawnmower, a push lawnmower, or any other type of intelligent lawnmower capable of automatically moving within the work area and performing automatic cutting operations. Changes in the form of the intelligent lawnmower 100 do not substantially affect the structure and function of this disclosure.

[0059] The intelligent lawnmower 100 includes a body 1 and a moving device 2. The moving device 2 is mounted on the body 1 and is used to support and drive the body 1 to move within the working area according to received drive commands to complete the operation. The moving device 2 includes drive wheels 21, which typically include rollers and a motor that drives the rollers to rotate. There may be two sets of drive wheels 21, which are located on both sides of the body 1. In this embodiment, the two sets of drive wheels 21 are located at the rear end of the body 1 as rear wheels. Two steering wheels (not shown) are located at the front end of the body 1, and the two steering wheels are arranged opposite each other on both sides of the body 1. The steering wheels are used to turn the body 1, and the drive wheels 21 are used to move the body 1. In other embodiments, the two sets of drive wheels 21 can be used as front wheels and located at the front end of the body 1, or the lawnmower can include four sets of drive wheels 21, with two sets of drive wheels 21 used as front wheels located at the front end of the body 1, and the other two sets of drive wheels 21 used as rear wheels located at the rear end of the body 1, so that the movement of the body 1 is achieved by the movement of the four sets of drive wheels 21.

[0060] The intelligent lawnmower 100 also includes a cutting device 3 mounted on the body 1. The cutting device 3 includes a cutting module 4 located at the bottom of the body 1 and a drive module 31 mounted on the body 1. The cutting module 4 rotates around its own axis under the drive of the drive module 31. The drive module 31 can be a motor or other power structure, which is existing technology and will not be described in detail here. The output end 32 of the drive module 31 is connected to the cutting module 4 to drive the cutting module 4 to rotate around its own axis for cutting.

[0061] The number of cutting modules 4 can be one, two, three, etc., and the number of drive modules 31 is the same as the number of cutting modules 4, with each drive module 31 corresponding to a cutting module 4. In one embodiment, at least two sets of cutting devices 3 are provided, with each set of cutting devices 3 staggered on the body 1 to avoid a straight line arrangement that would increase the space occupied, thus improving the structural compactness of the intelligent lawnmower 100. Furthermore, to avoid grass leakage, the cutting areas of adjacent sets of cutting devices 3 are connected or at least partially overlap. The cutting devices 3 can be located between the front and rear wheels and the rear wheel. It is understood that the cutting devices 3 can not only be located between the front and rear wheels, but can also be located on the front, rear, or side of the body 1.

[0062] The intelligent lawnmower 100 may also include an energy module (not shown) for providing energy for various operations of the intelligent lawnmower 100. The energy module may include a rechargeable battery and a charging connection structure, wherein the charging connection structure is typically a charging electrode plate that can be used in conjunction with a charging electrode plate provided at a docking station to charge the intelligent lawnmower 100.

[0063] The intelligent lawnmower 100 also includes a control device 5 installed on the body 1. The control device 5 is connected to the moving device 2 and the cutting module 4 to control the automatic movement and operation of the intelligent lawnmower 100. Its functions include controlling the cutting module 4 to start or stop, generating a movement path and controlling the moving device 2 to move along the path, judging the power of the energy module and controlling the intelligent lawnmower 100 to return to the docking station for automatic charging, etc.

[0064] To enable the intelligent lawnmower 100 to move and cut grass autonomously without user intervention, thus improving the user experience, the intelligent lawnmower 100 also includes a positioning device (not shown) mounted on the body 1. This device acquires the lawnmower's own position coordinates, allowing it to navigate automatically along a preset path. The positioning device includes a locator for receiving satellite signals and / or base station signals and outputting positioning data. A control device 5, located within the body 1, acquires the location data of the self-moving device based on the positioning data output by the positioning device (locator). The positioning device can be offset or centrally mounted on the body 1. Optionally, the positioning device can also be detachably connected to the body 1. On the other hand, positioning devices can obtain the coordinate information of their location through absolute or relative positioning. Accordingly, positioning devices can include visual sensors (such as monocular cameras, multi-view cameras, depth cameras, etc.), image sensors, satellite positioning sensors, etc. Accordingly, positioning devices can use one or more of the following positioning technologies to obtain the coordinate information of their location: GPS technology, vision-based simultaneous localization and mapping (VSLAM) technology, real-time kinematic (RTK) positioning technology, etc.

[0065] Please see Figures 2 to 5 The cutting module 4 includes a cutter head 41, which is rotatably mounted on the machine body 1. The cutter head 41 is connected to the output end 32 of the drive module 31 by a first screw 42, enabling the cutter head 41 and the output end 32 to rotate synchronously. By removing the first screw 42, the cutter head 41 and the output end 32 can be separated, facilitating maintenance and other operations of the cutting module 4. The number of first screws 42 can be set to at least two, such as three or four, to ensure the connection stability between the cutting module 4 and the drive module 31.

[0066] The cutting module 4 also includes a cutting element 43 disposed on the cutter head 41 and rotating synchronously with the cutter head 41. The cutting element 43 can be a metal or non-metal component such as a blade or metal wire, and can be selected according to the specific application scenario. Optionally, the cutting element 43 is a blade. Each blade is independently regular or irregular in shape, and can be circular, rectangular, or other shapes. Optionally, the blade is a long strip blade, which includes at least one straight-edged cutting edge. In this embodiment, the blade has two straight-edged cutting edges. When the cutting edge on one side is damaged after working for a period of time, the cutting edge on the other side can be replaced, which can reduce the frequency of blade replacement and save costs.

[0067] In this embodiment, to ensure the cutting efficiency of the cutting module 4, at least two cutting elements 43 are provided. These at least two cutting elements 43 are located at the edge of the cutter head 41, and can be positioned within a single cutting plane, or within two or more cutting planes at different cutting heights. The cutting plane is either the upper or lower surface of the cutter head 41. The number of cutting planes provided in the cutting module 4 is not specifically limited here; that is, the cutting module 4 can have a single-layer blade or multiple-layer blades. When the number of cutting planes is at least two, the distance between two adjacent cutting planes is not specifically limited here, and the two adjacent cutting planes can be the upper and lower surfaces of the cutter head 41, respectively. Alternatively, the cutter head 41 includes at least two mounting bodies positioned apart along the direction of the rotation axis of the cutter head 41, and each mounting body has a cutting plane.

[0068] Optionally, multiple cutting elements 43 are distributed in two cutting planes at different heights. At least two cutting elements 43 are arranged in each cutting plane, and the cutting elements 43 are evenly distributed circumferentially along the cutter head 41 to ensure the balance of the cutting module 4 during operation. Three cutting elements 43 are evenly distributed circumferentially along the cutter head 41 in both cutting planes. The number of cutting elements 43 in each cutting plane can be the same or different, and is not limited to three; it can be two, four, or more. However, to achieve cutting balance and improve efficiency, each cutting element 43 must be evenly distributed circumferentially along the cutter head 41. The specifications of the multiple cutting elements 43 in both cutting planes are the same, which helps ensure the versatility of the cutting elements 43 and can more effectively reduce costs. Furthermore, the projections of the multiple cutting elements 43 in a plane perpendicular to the rotation axis of the cutter head 41 do not coincide; that is, the multiple cutting elements 43 are staggered and spaced along the cutter head 41. This arrangement allows the cutter head 41 assembly to achieve sequential cutting of the grass during operation.

[0069] The cutting element 43 can be designed to be fixed on the cutter head 41, or it can be designed as a retractable structure. For example, when rotating, the cutting element 43 extends out of the cutter head 41 under centrifugal force; when not rotating, the cutting element 43 can be stored inside the cutter head 41 for protection. Optionally, the cutting element 43 is pivotally connected to the cutter head 41, meaning that when the cutting element 43 is mounted on the cutter head 41, it can rotate freely around the axis of its mounting structure. This allows the cutting element 43 to rotate and avoid obstacles encountered during cutting, reducing damage and extending its service life. Furthermore, when the cutting module 4 is not in use, the cutting element 43 can rotate under force when the user touches it, effectively reducing the risk of injury. When the cutting module 4 is working, the cutting element 43 extends out of the cutter head 41 under centrifugal force to perform cutting operations.

[0070] The cutting component 43 is detachably mounted on the cutter head 41 to facilitate replacement and ensure the cutting quality of the cutting module 4. Optionally, the cutting component 43 is locked onto the cutter head 41 by a second screw 44. The cutting component 43 has an opening, and the cutter head 41 has an internally threaded hole that mates with the external thread of the second screw 44. The cutting component 43 is mounted onto the cutter head 41 by the engagement of the external thread of the second screw 44 and the internal thread of the internally threaded hole. The second screw 44 is removed and installed using a tool, thereby enabling the replacement of the cutting component 43. This allows the user to easily replace a damaged cutting component 43 with a new one. In other embodiments, the cutting component can also be mounted on the cutter head in other ways. For example, the mounting structure for mounting the cutting component can be removed by the user, allowing the cutting component to be removed from the cutter head. A new cutting component can then be locked onto the cutter head by the mounting structure, enabling replacement of the cutting component without tools.

[0071] The cutting module 4 includes a protective disc 45 located on the side of the cutter head 41 away from the machine body 1 and rotatably connected to the cutter head 41. Specifically, the protective disc 45 rotates relative to the cutter head 41 via a bearing assembly 46, so that the protective disc 45 does not rotate synchronously with the cutter head 41. That is, the protective disc 45 is not driven to rotate by the drive module 31. When the cutting module 4 is cutting, the protective disc 45 can slide in contact with the lawn in a translational motion according to the movement of the intelligent lawnmower 100, thereby achieving contact between the protective disc 45 and the lawn. The protective disc 45 can remain stationary or rotate slowly. The protective disc 45 is located below the cutter head 41. The protective disc 45 blocks or reduces the contact between the lawn and the cutter head 41, reduces the frictional resistance of the lawn to the cutter head 41 and the energy loss of the cutter head 41 rotation, thereby reducing the cutting load and cutting energy consumption, and improving cutting efficiency. Meanwhile, the protective disc 45 can block grass clippings outside the cutter head 41, reducing the amount of grass clippings entering between the cutter head 41 and the cutting element 43, thus improving cutting ability. In addition, the second screw 44 does not need to directly contact the obstacle, avoiding the second screw 11 from being worn and loosened by the obstacle. The protective disc 45 also increases the installation stability of the cutting element 43 on the cutter head 41.

[0072] Please see Figures 5 to 7 In this disclosure, the central portion 451 of the protective disc 45 is at least partially located below the bearing assembly 46. The central portion 451 extends continuously, effectively preventing grass clippings from entering the space between the protective disc 45 and the cutter head 41, thus ensuring the effective operation of the protective disc 45. Specifically, if grass clippings enter the space between the protective disc 45 and the cutter head 41 and then into the bearing assembly 46, the outer and inner rings of the bearing assembly 46 remain relatively fixed, causing the cutter head 41 to rotate the protective disc 45 via the bearing assembly 46, rendering the protective disc 45 ineffective. In this disclosure, the continuously extending central portion 451 effectively prevents grass clippings from entering the bearing assembly 46.

[0073] The flat plate portion 452 of the protective disc 45 is located on the outer periphery of the central portion 451. The bottom surface of the flat plate portion 452 can be approximately a flat plane or a curved surface with a small curvature. Optionally, the flat plate portion 452 is approximately a flat plate or a curved plate with a small curvature. Optionally, the flat plate portion 452 extends on a plane and is a plate of uniform thickness. That is, when the cutting module 4 is installed on the machine body 1, and the machine body 1 is resting on a horizontal surface, the distance between any part of the bottom surface of the flat plate portion 452 and the ground remains the same, thereby effectively reducing the friction between the cutter head 41 and the grass and reducing power consumption.

[0074] In existing technologies, the protective disc extends entirely on a single plane, or its outermost edge extends on a single plane. When the cutting module cuts grass at a low cutting height, the protective disc risks peeling off the turf or even cutting into the ground, causing damage to the lawn. In this disclosure, one end of the edge 453 of the protective disc 45 is connected to the flat plate 452, and the other end is curved towards the side where the cutter head 41 is located, forming a bowl-shaped structure. The edge 453 is raised, effectively reducing the risk of the protective disc 45 peeling off the turf and the risk of it cutting into the ground, effectively protecting the lawn. For example, Figure 4 and Figure 5 The edge portion 453 is entirely raised, providing 360-degree protection for the lawn. In other embodiments, the edge portion 453 may also be protruding claws or similar features that extend from the outer periphery of the flat plate portion 452 and are spaced apart. One end of the claw is connected to the flat plate portion 452, and the other end is bent towards the side where the blade disc 41 is located, forming a bowl-like structure. It should be noted that the outer surface of the edge portion 453 is an arc-shaped structure. The edge portion 453 is far from the ground, and the part of the protective disc 45 that contacts the raised ground is the arc-shaped edge portion 453, which is gentle and can effectively avoid cutting into the raised ground. This allows the intelligent lawnmower 100 to cut at a low cutting height while protecting the ground from damage. It should be noted that when the cutting elements 43 of the intelligent lawnmower 100 are distributed in two or more cutting planes at different heights, that is, when the cutting module 4 has a multi-layer blade structure, the lowest cutting height of the cutting module 4 involved in this embodiment is the height of the bottommost cutting element 43 from the ground.

[0075] Along the axial direction of the cutter head 41, the distance between the lowest surface of the cutting piece 43 and the protective disc 45 is less than or equal to 20 mm. The axial direction of the cutter head 41 is as follows: Figure 5 As shown by arrow A in the diagram. When the intelligent lawnmower 100 is cutting, the bottom surface of the protective disc 45 can approach or abut against the ground and slide on the ground. The distance between the cutting element 43 and the bottom surface of the protective disc 45 limits the cutting height of the cutting element 43. In this embodiment, the cutting height of the intelligent lawnmower 100 can be less than 20mm. Optionally, along the axial direction of the blade disc 41, the distance between the cutting element 43 and the lowest surface of the protective disc 45 is less than or equal to 15mm, that is, the cutting height of the intelligent lawnmower 100 can be less than 15mm. In other embodiments, the distance between the cutting element 43 and the lowest surface of the protective disc 45 is less than or equal to 30mm, and the distance between the cutting element 43 and the lowest surface of the protective disc 45 is less than or equal to 10mm. The cutting height of the cutting element 43 can be 9mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc., and other values ​​are also possible, which are not listed here.

[0076] To achieve a low cutting height for the intelligent lawnmower 100, the height of the protective disc 45 along the axial direction of the cutter head 41 is minimized. Along the axial direction of the cutter head 41, the lowest surface of the central portion 451 is at least 1mm below the lowest surface of the flat portion 452. That is, the bottom surface of the central portion 451 can be lower than the bottom surface of the flat portion 452, but the difference cannot exceed 1mm. The bottom surface of the central portion 451 can be higher than the bottom surface of the flat portion 452, and the distance between the bottom surface of the central portion 451 and the bottom surface of the flat portion 452 is not limited and can be set according to actual needs. Optionally, along the axial direction of the cutter head 41, the lowest surface of the central portion 451 of the protective disc 45 is not lower than the lowest surface of the flat plate portion 452. That is, the lowest surface of the flat plate portion 452 of the protective disc 45 defines the bottom surface of the protective disc 45. This arrangement ensures that the central portion 451 does not extend beyond the flat plate portion 452, eliminating the risk of the central portion 451 damaging the lawn. At the same time, it makes the height dimension of the protective disc 45 in the axial direction as small as possible, ensuring that the cutting element 43 achieves a lower cutting height.

[0077] The protective disc 45 also includes a mounting portion 454 connecting the central portion 451 and the flat portion 452. That is, the protective disc 45 consists of a central portion 451, a mounting portion 454, a flat portion 452, and an edge portion 453, arranged sequentially from the center outwards. The mounting portion 454 surrounds the circumference of the central portion 451, the flat portion 452 surrounds the circumference of the mounting portion 454, and the edge portion 453 surrounds the circumference of the flat portion 452. The mounting portion 454 is provided with a mounting hole 455. The mounting hole 455 and the mounting member 456 cooperate to connect the protective disc 45 to the cutter head 41. Along the axial direction of the cutter head 41, the lowest surface of the mounting member 456 is not lower than the lowest surface of the flat portion 452. Specifically, along the axial direction of the cutter head 41, the height of the bottom surface of the mounting portion 454 is higher than the height of the bottom surface of the flat plate portion 452. The mounting portion 454 is recessed from the flat plate portion 452 toward the side where the cutter head 41 is located to form an annular recess 4541. The annular recess 4541 is used to accommodate the top of the mounting member 456, thereby effectively ensuring that the lowest surface of the mounting member 456 is not lower than the lowest surface of the flat plate portion 452, so as to avoid the mounting member 456 protruding from the flat plate portion 452, thereby eliminating the risk of the mounting member 456 damaging the lawn. At the same time, the height dimension of the protective disc 45 in the axial direction is minimized, ensuring that the cutting member 43 achieves a lower cutting height.

[0078] To achieve a low cutting height in the intelligent lawnmower 100, the distance between the protective disc 45 and the blade disc 41 is minimized. In this embodiment, along the axial direction of the blade disc 41, the central portion 451 is recessed towards the side away from the blade disc 41 to form a receiving cavity 4511, and the bearing assembly 46 is at least partially located within the receiving cavity 4511. That is, the central portion 451 has a bowl-shaped structure to accommodate at least part of the structure, reducing the axial dimension of the cutting module 4, making the layout of the cutting module 4 more reasonable, and at the same time reducing the distance between the cutting element 43 and the bottom surface of the protective disc 45, thereby achieving a lower cutting height.

[0079] To achieve a low cutting height for the intelligent lawnmower 100, the cutting element 43 is mounted on the side of the blade disc 41 facing the protective disc 45, thereby reducing the distance between the cutting element 43 and the protective disc 45. Furthermore, when the cutting element 43 is mounted on the blade disc 41, a gap exists between the cutting element 43 and the blade disc 41, further reducing the distance between the cutting element 43 and the protective disc 45. This gap effectively reduces the risk of the cutting element 43 becoming stuck due to the presence of grass clippings. The gap between the cutting element 43 and the blade disc 41 is not limited here and can be set according to actual needs. In other embodiments, the cutting element 43 is mounted on the blade disc 41, and the cutting element 43 can move up and down within a certain range along the axial direction of the blade disc 41, similarly effectively reducing the risk of the cutting element 43 becoming stuck due to the presence of grass clippings.

[0080] In this embodiment, the protective disc 45 can be installed very close to the cutter 43. The second screw 44 does not need to be completely contained above the protective disc 45, but it can be allowed to extend downwards, i.e., partially contained within the protective disc 45. It is only necessary to ensure that there is a gap between the cutter 43 and the protective disc 45 to prevent grass clippings from accumulating between them and restricting the rotation of the cutter 43. Therefore, the cutter 43 can be installed very close to ground level in the lawnmower.

[0081] In one embodiment, the protective disc 45 is a one-piece structure, approximately circular in shape, with the central portion 451, mounting portion 454, flat portion 452, and edge portion 453 integrally formed. This facilitates the fabrication of the protective disc 45 and ensures its strength and service life. In other embodiments, the protective disc 45 may also be provided in parts, such as with the edge portion 453 mounted on the flat portion 452; no specific limitation is made here.

[0082] In one embodiment, the protective disc 45 is a metal plate, such as a steel plate or an iron plate. A metal protective disc 45 has a long service life, a low risk of deformation, and is most likely to retain its original shape after impacting an obstacle, eliminating the possibility of a deformed protective disc 45 having sharp edges that could damage the lawn. Furthermore, the metal plate protective disc 45 is simple to manufacture, as it can be injection molded without additional connecting steps.

[0083] The protective disc 45 is located below the cutter head 41. Along the radial direction of the cutter head 41, the end of the protective disc 45 does not protrude beyond the outermost edge of the cutting path of the cutting element 43. Specifically, the cutting element 43 can contact the grass on the outer periphery of the protective disc 45, thus successfully completing the cutting operation. Optionally, along the radial direction of the cutter head 41, the end of the protective disc 45 does not protrude beyond the end of the cutter head 41, to ensure that the cutting edge of the cutting element 43 can contact the grass for cutting when it rotates.

[0084] In one embodiment, as described above, the cutting elements 43 are pivotally arranged on the cutter head 41. This arrangement also eliminates the risk of stripping the turf, as the cutting elements 43 pivot inward if they encounter excessive cutting resistance. When the cutting elements 43 contact the ground or the bottom portion of the turf, instead of moving forward with the rotating cutting head, they allow themselves to pivot within the outer periphery of the cutting head and the anti-slip plate, thus preventing damage to the turf.

[0085] Please see Figure 3 , Figure 5 , Figure 8 and Figure 9 The cutting module 4 also includes a first connector 47 installed on the cutter head 41 and a second connector 48 connected to the protective disc 45. The bearing assembly 46 is disposed between the first connector 47 and the second connector 48. In this embodiment, the protective disc 45 and the cutter head 41 are rotated through the first connector 47, the second connector 48 and the bearing assembly 46.

[0086] The cutter head 41 is recessed inward toward the direction away from the protective disc 45 to form a receiving cavity 411, that is, the cutter head 41 is recessed upward to form a receiving cavity 411. The first connecting member 47 is at least partially located within the receiving cavity 411, so that the axial layout of the cutting module 4 is reasonable and compact, while reducing the distance between the cutting member 43 and the protective disc 45, so that the cutting module 4 can achieve a lower cutting height and ensure the smooth movement of the protective disc 45, reducing problems such as the protective disc 45 scraping the ground when the cutting module 4 is at a lower cutting height. Optionally, the second connecting member 48 and the bearing assembly 46 may also be partially located within the receiving cavity 411, further improving the reasonable layout of the cutting module 4 and the smoothness of the cutting member 43 cutting the lawn at a lower cutting height.

[0087] The first connector 47 includes a first body 471 and a mating portion 472 extending from the first body 471 toward the protective disc 45, wherein the mating portion 472 is a hollow cylindrical structure. The first connector 47 and the cutter head 41 are detachably connected by a first screw 42. The first screw 42 passes through the first body 471 and the cutter head 41 from bottom to top and extends into the output end 32 of the drive module 31, thereby connecting the cutter head 41 to the output end 32, so that the cutter head 41 rotates under the action of the drive module 31. When it is necessary to remove the cutter head 41 from the output end 32 or to remove the first connector 47 from the cutter head 41, the first screw 42 first disengages from the output end 32, and then disengages from the cutter head 41 and the first connector 47. The installation or removal of the first screw 42 can be achieved by tools, such as electric screwdrivers, electric wrenches, screwdrivers, wrenches, etc. Clearly, multiple first screws 42 are provided to ensure the stability of the connection between the cutter head 41 and the output end 32. The first connector 47 and the cutter head 41 are separately configured to facilitate the removal of the first connector 47 from the cutter head 41 for handling the grass clippings attached to the first connector 47. It should be noted that this embodiment adds the first connector 47 to the existing cutter head 41 structure to rotatably mount the protective disc 45 onto the cutter head 41 without changing the structure of the cutter head 41. The existing cutter head 41 can be used directly, reducing the manufacturing process and lowering the manufacturing difficulty. Furthermore, the first screws 42 are not directly connected to the motor shaft of the motor. Instead, a connector is sleeved on the motor shaft, and the first screws 42 are connected to the connector. This configuration reduces the probability of motor shaft damage, increases the service life of the motor, reduces costs, and facilitates replacement. When the threads that mate with the first screw 42 are damaged, only the connector needs to be replaced, making the operation simple. In addition, the fact that the first screws 42 are not directly connected to the motor shaft also reduces the axial dimension of the cutting module 4.

[0088] A limiting structure is also provided between the cutter head 41 and the first connecting member 47 to further increase the connection stability between the cutter head 41 and the first connecting member 47. A first limiting member 412 is provided on the cutter head 41, and a second limiting member 474 is provided on the first connecting member 47. Through the cooperation of the first limiting member 412 and the second limiting member 474, the cutter head 41 and the first connecting member 47 are relatively fixed in the circumferential direction. Specifically, one of the first limiting member 412 and the second limiting member 474 is a protrusion, and the other is a receiving hole. The protrusion extends into the receiving hole to prevent one of the protective disc 45 and the second connecting member 48 from rotating relative to the other. In this embodiment, the protrusion is integrally formed with the cutter head, and the receiving hole is formed on the first connecting member 47.

[0089] The bearing assembly 46 includes at least one bearing. A second connecting member 48 is detachably connected to the outer ring of the bearing, and the inner ring of the bearing is detachably connected to a first connecting member 47. The outer and inner rings of the bearing rotate relative to each other so that the second connecting member 48 does not rotate with the first connecting member 47, thereby preventing the protective disc 45 from rotating with the cutter head 41. Optionally, the second connecting member 48 is interference-fitted with the outer ring of the bearing, thereby allowing the second connecting member 48 to be mounted on the bearing assembly 46. The inner ring of the bearing is clearance-fitted with the first connecting member 47 to facilitate the assembly and disassembly of the protective disc 45 and the cutter head 41.

[0090] Optionally, the bearing assembly 46 includes a first bearing 461 and a second bearing 462, which are coaxially arranged. The first bearing 461 and the second bearing 462 are fitted onto the outer periphery of the mating portion 472. The cutting module 4 also includes a locking screw 49. The inner surface of the mating portion 472 has an internal thread, and the locking screw 49 has an external thread. The external thread of the locking screw 49 and the internal thread of the mating portion 472 engage to install the bearing assembly 46 onto the first connector 47. Specifically, the top of the locking screw 49 abuts against the inner ring of the second bearing 462 to axially limit the first bearing 461 and the second bearing 462 between the top and the first body 471. When the first bearing 461 and the second bearing 462 are fitted onto the outer periphery of the mating portion 472, there may be gaps between the first bearing 461 and the second bearing 462 and the outer periphery of the mating portion 472, facilitating the disassembly or installation of the first bearing 461 and the second bearing 462. Furthermore, a washer 463 is provided between the first bearing 461 and the second bearing 462 to maintain a gap between the first bearing 461 and the second bearing 462, thereby reducing friction and wear between the first bearing 461 and the second bearing 462.

[0091] The second connector 48 includes a second body 481, which has a first groove 482, a second groove 483, and an annular platform 484 located between the first groove 482 and the second groove 483. The annular platform 484 is an annular boss protruding from the second body 481 toward the center. A first bearing 461 is located in the first groove 482, and a second bearing 462 is located in the second groove 483. The annular platform 484 separates the outer rings of the first bearing 461 and the second bearing 462, and a washer 463 is located within the annular platform 484. The second body 481 is interference-fitted with the outer rings of the first bearing 461 and the second bearing 462, respectively, so that the second connector 48 is connected to the cutter head 41 and does not rotate synchronously with the cutter head 41.

[0092] As described above, the protective disc 45 is connected to the cutter head 41 via a mounting member 456. Specifically, the protective disc 45 is mounted to the second connecting member 48 via the mounting member 456. The second connecting member 48 is mounted to the bearing assembly 46, which is connected to the first connecting member 47 via a locking screw 49. The first connecting member 47 is connected to the cutter head 41 via a first screw 42, thereby achieving the installation of the protective disc 45 on the cutter head 41. Specifically, the protective disc 45 is provided with a mounting hole 455 that mates with the mounting member 456, and the second connecting member 48 is provided with a mating hole 485 that mates with the mounting member 456. The mounting hole 455 and the mating hole 485 are positioned correspondingly. The mounting member 456 first passes through the mounting hole 455 of the protective disc 45, and then passes through the mating hole 485 on the second connecting member 48, to achieve a fixed connection between the protective disc 45 and the second connecting member 48. When the protective disc 45 needs to be removed from the second connector 48, the mounting part 456 first disengages from the mating hole 485 on the second connector 48, and then disengages from the mounting hole 455 on the protective disc 45. The mounting part 456 can be installed or removed using tools such as electric screwdrivers, electric wrenches, screwdrivers, or wrenches. The mounting part 456 is a screw, and the mounting hole 455 and the mating hole 485 are internally threaded holes that mate with the external threads of the screw. The mounting part 456 includes a rod portion 4561 and an end portion 4562 connected to the rod portion 4561. The tool and the end portion 4562 cooperate to achieve the installation or removal of the mounting part 456. The diameter of the end portion 4562 is larger than the diameter of the rod portion 4561. The rod portion 4561 has external threads to achieve threaded engagement with the mounting hole 455 and the mating hole 485. The diameter of end 4562 is larger than the diameters of mounting hole 455 and mating hole 485. When mounting member 456 is installed onto protective plate 45 and second connector 48, end 4562 is located on the side of protective plate 45 away from second connector 48, facilitating user operation of mounting member 456 with tools. Clearly, multiple mounting members 456 are provided, with mounting holes 455 and mating holes 485 corresponding to mounting members 456. Multiple mounting members 456 ensure stable connection between protective plate 45 and second connector 48. In other embodiments, mounting member 456 can also have other structures, such as a snap-fit ​​structure between protective plate 45 and second connector 48.

[0093] A limiting structure is also provided between the protective disc 45 and the second connecting member 48 to further increase the connection stability of the protective disc 45 and the second connecting member 48. A third limiting member 457 is provided on the protective disc 45, and a fourth limiting member 486 is provided on the second connecting member 48. Through the cooperation of the third limiting member 457 and the fourth limiting member 486, the protective disc 45 and the second connecting member 48 are relatively fixed in the circumferential direction. Specifically, one of the third limiting member 457 and the fourth limiting member 486 is a protrusion, and the other is a receiving hole. The protrusion extends into the receiving hole to prevent one of the protective disc 45 and the second connecting member 48 from rotating relative to the other. In this embodiment, the protrusion is integrally formed with the second body 481, and the receiving hole is a through hole formed on the mounting portion 454 on the protective disc 45.

[0094] As described above, the central portion 451 of the protective disc 45 extends continuously. The protective disc 45 and the second connecting member 48 form a sealing structure below the bearing assembly 46, preventing grass clippings from entering from below the bearing assembly 46 through any gap. To further protect the bearing assembly 46, a labyrinth structure is formed between the first connecting member 47 and the second connecting member 48 to prevent grass clippings from entering between the first connecting member 47 and the second connecting member 48 and from entering the interior of the first bearing 461 from above the bearing assembly 46. This ensures that the protective disc 13 does not rotate synchronously with the cutter head 11, thus guaranteeing the functional effect of the protective disc 13.

[0095] Please see Figure 8 In one embodiment, the first connector 47 further includes an extension 473 extending from the first body 471 toward the protective disc 45, wherein the extension 473 is located on the outer periphery of the mating portion 472. The second connector 48 further includes a protrusion 487 protruding from the second body 481 toward the cutter head 41, and both the extension 473 and the protrusion 487 are hollow cylindrical structures. On the projection plane along the radial direction of the cutter head 41, the projection of the protrusion 487 and the projection of the extension 473 at least partially overlap. That is, the protrusion 487 is at least partially fitted on the outer periphery of the extension 473, or the extension 473 is at least partially fitted on the outer periphery of the protrusion 487. The gap formed by the at least partial overlap of the protrusion 487 and the extension 473 along the axial direction of the cutter head 41 ensures the smooth rotation of the first connector 47 relative to the second connector 48 and effectively prevents grass clippings from entering the bearing assembly 46.

[0096] Please see Figure 10In one embodiment, one of the first connector 47 and the second connector 48 has a protrusion 488, and the other of the first connector 47 and the second connector 48 has a receiving groove 475 for accommodating at least a portion of the protrusion 488. The protrusion 488 and the receiving groove 475 cooperate to form a labyrinth structure. Optionally, the first connector 47 has two extensions 473 forming the receiving groove 475, and the protrusion 487 of the second connector 48 serves as the protrusion 488, with the two extensions 473 clamping at least a portion of the protrusion 487 to the outside to form a labyrinth structure. Optionally, the second connector 48 has two protrusions 487 forming the receiving groove 475, and the extensions 473 of the first connector 47 serve as the protrusion 488, with the two protrusions 487 clamping at least a portion of the extension 473 to the outside to form a labyrinth structure. On the projection plane along the radial direction of the cutter head 41, the overlap length of the projections of the protrusion 487 and the extension 473 is greater than the shortest distance between the first body 471 and the second body 481. That is, at least one of the extension 473 and the protrusion 487 extends into the structure opposite to it. In this embodiment, the first body 471 is provided with a receiving groove 475. The receiving groove 475 is formed by indentation from the surface of the first body 471 facing the second connector 48 towards the direction of the cutter head 41. The height of the protrusion 487 is greater than the shortest distance between the first body 471 and the second body 481, so that the protrusion 487 extends into the receiving groove 475 of the first body 471, and the protrusion 487 does not contact the first body 471 and the extension 473. This arrangement can not only ensure the smooth rotation of the first connector 47 relative to the second connector 48, but also increase the sealing performance between the first connector 47 and the second connector 48. The distance between the extension 473 and the protrusion 487 is increased, which effectively reduces the probability of grass clippings entering the first bearing 461 and increases the service life of the protective disc 45. Optionally, a receiving groove 475 is formed on the second body 481, and the height of the extension 473 is greater than the shortest distance between the first body 471 and the second body 481, so that the extension 473 extends into the second body 481. Optionally, both the extension 473 and the protrusion 487 are provided with receiving grooves 475, and the extension 473 and the protrusion 487 are at least partially received in the receiving grooves 475, further increasing the distance that grass clippings can travel from between the extension 473 and the protrusion 487 to the first bearing 461. Obviously, the gaps between the extension 473 and the protrusion 487, the gap between the extension 473 and the second body 481, and the gap between the protrusion 487 and the first body 471 are set as needed, which is necessary to ensure smooth rotation between the first connector 47 and the second connector 48, and to effectively prevent grass clippings from entering the first bearing 461.

[0097] Please see Figure 8In one embodiment, the cutting module 4 further includes a seal 464 disposed between the first connector 47 and the second connector 48 to prevent foreign objects from entering the bearing assembly 46. The seal 464 is disposed at the end of the bearing assembly 46 near the first connector 47. The seal 464 is disposed above the first bearing 461 and has an annular structure, which at least covers the structure between the inner and outer rings of the first bearing 461, further preventing grass clippings from entering the bearing assembly 46 and ensuring the normal operation of the protective disc 45.

[0098] Please see Figure 8 A washer 491 is provided between the locking screw 49 and the mating part 472. Specifically, the washer 491 is sleeved on at least a portion of the mating part 472 away from the first body 471, and the washer 491 and the mating part 472 are fixed by a flat rectangular limit. When the locking screw 49 and the mating part 472 are engaged, the washer 491 is fixed between the mating part 472 and the locking screw 49. The setting of the washer 491 avoids direct contact between the locking screw 49 and the second bearing 462, effectively avoiding friction caused by relative rotation between the locking screw 49 and the second bearing 462, which would lead to wear and loosening of the locking screw 49. The washer 491 ensures synchronous rotation of the locking screw 49 and the first connecting member 47, and improves the wear and loosening of the locking screw 49, thereby improving the stability of the intelligent lawnmower 100.

[0099] Please see Figures 2 to 9 The intelligent lawnmower 100 disclosed herein is used on golf courses to mow grass at a lower cutting height, effectively avoiding the problem of shoveling the lawn. Simultaneously, the protective disc 45 has a long service life and a low failure rate. This intelligent lawnmower 100 can move autonomously along a preset path on the golf course and perform cutting work. It includes a body 1, drive wheels 21 mounted on both sides of the rear of the body 1, steering wheels mounted on both sides of the front of the body 1, two staggered cutting devices 3 mounted on the body 1, and a control device 5, energy module, and positioning device mounted on the body 1. The drive module 31 of the cutting device 3 is a motor, and the output shaft of the motor is connected to the cutting module 4 of the cutting device 3 to drive the cutting module 4 to rotate and perform the mowing work.

[0100] The cutting module 4 includes a cutter head 41, a first connector 47 mounted on the cutter head 41, a bearing assembly 46 connected to the first connector 47 by a locking screw 49, a second connector 48 mounted to the bearing assembly 46 by an interference fit, and a protective disc 45 connected to the second connector 48 by a mounting piece 456. Three cutting elements 43, which are blades, are connected to the cutter head 41 by a second screw 44. All three cutting elements 43 are located on the bottom surface of the cutter head 41 and are evenly spaced to ensure the rotational stability of the cutter head 41. The cutting elements 43 are pivotally arranged on the cutter head 41, which also eliminates the risk of stripping the lawn. If the cutting elements 43 encounter excessive cutting resistance, they pivot inward. When the cutting elements 43 contact the ground or the bottom part of the lawn, they do not move forward with the rotating cutter head but instead yield and pivot inside the outer periphery of the cutter head and the anti-slip plate, thus preventing damage to the lawn. There is a gap between the bottom surface of the cutting element 43 and the blade 41 to reduce the distance between the lowest surface of the cutting element 43 and the protective disc 45, thereby reducing the cutting height of the intelligent lawnmower 100.

[0101] The central portion 451 of the protective disc 45, located below the bearing assembly 46, extends continuously, effectively preventing grass clippings from entering the bearing assembly 46 from below the protective disc 45, ensuring the normal operation of the bearing assembly 46 and preventing the protective disc 45 from failing. The central portion 451 has a downwardly concave structure to accommodate at least part of the locking screw 49, reducing the axial dimension of the cutting module 4. Neither the mounting member 456 nor the central portion 451 is lower than the bottom surface of the central portion 451; that is, the bottom surface of the central portion 451 defines the lowest surface of the protective disc 45, thereby reducing the distance between the cutting member 43 and the lowest surface of the protective disc 45, achieving a low cutting height. The edge portion 453 of the protective disc 45 is raised, effectively reducing the risk of the protective disc 45 peeling off the lawn and reducing the risk of the protective disc 45 cutting into the ground, effectively protecting the lawn surface.

[0102] The first connector 47 and the second connector 48 form a labyrinth structure. A seal 464 is provided at the upper end of the bearing assembly 46, which effectively prevents grass clippings from entering the bearing assembly 46 from above, ensuring the normal operation of the bearing assembly 46 and preventing the protective disc 45 from failing. The first connector 47 is detachably installed on the cutter head 41, so that the first connector 47 can be easily removed from the cutter head 41 to handle the grass clippings attached to the first connector 47.

[0103] For example, see Figure 2 and Figure 10The intelligent lawnmower 100 disclosed herein is used in golf courses to mow grass at a lower cutting height, effectively avoiding the problem of shoveling the lawn. Simultaneously, the protective disc 45 has a long service life and a low failure rate. The first connector 47 and the second connector 48 of the intelligent lawnmower 100 form a labyrinth structure. An extension 473 is provided with a receiving groove 475, which is recessed from the surface of the first body 471 towards the second connector 48 towards the direction of the blade disc 41. A protrusion 487 extends into the receiving groove 475, but does not contact the first body 471 or the extension 473. This design ensures smooth rotation of the first connector 47 relative to the second connector 48 and increases the sealing performance between the first connector 47 and the second connector 48. The increased distance between the extension 473 and the protrusion 487 effectively reduces the probability of grass clippings entering the first bearing 461, increasing the service life of the protective disc 45. A washer 491 is provided between the locking screw 49 and the mating part 472 to ensure the synchronous rotation of the locking screw 49 and the first connecting part 47, and to improve the wear and loosening of the locking screw 49, thereby improving the stability of the use of the intelligent lawnmower 100.

[0104] In summary, the central part of the protective disc of the intelligent lawnmower is located at least partially below the bearing assembly, and the central part extends continuously. This effectively prevents grass clippings from entering the bearing assembly from the central part of the protective disc, ensuring the normal operation of the bearing assembly. As a result, the protective disc is not driven to rotate during the cutting operation of the intelligent lawnmower, which effectively reduces the frictional resistance of the lawn against the rotating blade and the resulting energy loss, thus reducing cutting energy consumption. At the same time, the edge of the protective disc is curved towards the side where the blade is located. When the intelligent lawnmower is cutting at a lower height, the part of the protective disc in contact with the ground is flat, making it less likely to cut into the ground, which can meet the requirements of lower cutting heights.

[0105] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above embodiments merely illustrate several implementation methods of this disclosure, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A smart lawnmower, characterized in that, include: fuselage (1); A mobile device (2) is mounted on the body (1) to support and drive the body (1) to move within the working area; The cutting device (3) includes a drive module (31) disposed on the body (1) and a cutting module (4) disposed at the bottom of the body (1). The cutting module (4) rotates around its own axis under the driving action of the drive module (31). A control device (5) is installed on the body (1) and is connected to the moving device (2) and the cutting device (3) to control the automatic movement and automatic operation of the intelligent lawnmower (100); The cutting module (4) includes: The cutter head (41) is rotatably mounted on the machine body (1); The cutting component (43) is disposed on the cutter head (41) and rotates synchronously with the cutter head (41); A protective disc (45) is located on the side of the cutter head (41) away from the machine body (1), and the protective disc (45) rotates relative to the cutter head (41) via a bearing assembly (46); The central portion (451) of the protective disc (45) is at least partially located below the bearing assembly (46), the central portion (451) extends continuously, the flat portion (452) of the protective disc (45) is located on the outer periphery of the central portion (451), one end of the edge portion (453) of the protective disc (45) is connected to the flat portion (452), and the other end is bent toward the side where the cutter head (41) is located.

2. The intelligent lawnmower as described in claim 1, characterized in that, Along the axial direction of the cutter head (41), the distance between the lowest surfaces of the cutting element (43) and the protective disc (45) is less than or equal to 20 mm.

3. The intelligent lawnmower as described in claim 1, characterized in that, Along the axial direction of the cutter head (41), the lowest surface of the central part (451) is at least 1 mm below the lowest surface of the flat plate part (452).

4. The intelligent lawnmower as described in claim 1 or 3, characterized in that, Along the axial direction of the cutter head (41), the lowest surface of the central portion (451) of the protective disc (45) is not lower than the lowest surface of the flat plate portion (452); there is a mounting portion (454) between the central portion (451) and the flat plate portion (452), the mounting portion (454) is provided with a mounting hole (455), the mounting hole (455) and the mounting member (456) cooperate to connect the protective disc (45) to the cutter head (41), and along the axial direction of the cutter head (41), the lowest surface of the mounting member (456) is not lower than the lowest surface of the flat plate portion (452).

5. The intelligent lawnmower as described in claim 1, characterized in that, Along the axial direction of the cutter head (41), the central portion (451) is recessed toward the side away from the cutter head (41) to form a receiving cavity (411), and the bearing assembly (46) is at least partially located in the receiving cavity (411).

6. The intelligent lawnmower as described in claim 1, characterized in that, The protective disc (45) is an integral structure.

7. The intelligent lawnmower as described in claim 1, characterized in that, The protective plate (45) is a metal plate.

8. The intelligent lawnmower as described in claim 1, characterized in that, The cutting module (4) further includes a first connector (47) mounted on the cutter head (41) and a second connector (48) connected to the protective disc (45). The bearing assembly (46) is disposed between the first connector (47) and the second connector (48). The first connector (47) includes a first body (471) and an extension (473) extending from the first body (471) toward the protective disc (45). The second connector (48) includes a second body (481) and a protrusion (487) protruding from the second body (481) toward the cutter head (41). On the projection plane along the radial direction of the cutter head (41), the projection of the protrusion (487) and the projection of the extension (473) at least partially overlap.

9. The intelligent lawnmower as described in claim 8, characterized in that, One of the first connector (47) and the second connector (48) has a protrusion (488), and the other of the first connector (47) and the second connector (48) has a receiving groove (475) for receiving at least part of the protrusion (488).

10. The intelligent lawnmower as described in claim 8, characterized in that, A seal (464) is provided between the first connector (47) and the second connector (48) to prevent foreign objects from entering the bearing assembly (46).

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