Lawn mowing robot

Abstract

The application provides a mowing robot, comprising a motor, a cutting mechanism, a grass collecting bottom shell and a heat dissipation structure, the cutting mechanism is connected to an output shaft of the motor, the grass collecting bottom shell is connected to the motor, the grass collecting bottom shell has a cutting space, the cutting mechanism is arranged in the cutting space, the heat dissipation structure is fixedly connected to the motor and at least partially extends into the cutting space, and airflow generated when the cutting mechanism rotates flows through the surface of the heat dissipation structure to take away the heat of the heat dissipation structure. The mowing robot provided by the application solves the technical problem that the mowing robot with the grass collecting function in the prior art has large motor output power and large heat generation.

Description

Technical Field

[0001] This application belongs to the field of garden equipment technology, and more specifically, relates to a lawn mowing robot. Background Technology

[0002] Lawn mowing robots are common gardening equipment used to cut lawn vegetation. They use motors to drive blades to rotate and cut the grass layer, thus smoothing the lawn surface.

[0003] For lawn mowing robots with grass collection functions, the cut grass clippings need to be transported into the grass collection frame. Therefore, a motor is usually required to drive the blades to rotate at high speed to generate sufficient airflow to assist in the discharge and collection of grass clippings. This process requires the motor to output a large amount of power, which leads to a significant increase in heat generation during motor operation, affecting the service life and operating efficiency of the equipment. Utility Model Content

[0004] The purpose of this application is to provide a lawn mowing robot to solve the technical problems of existing lawn mowing robots with grass collection functions having high motor output power and high heat generation.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a lawn mowing robot is provided, including a motor, a cutting mechanism, a grass collecting bottom shell, and a heat dissipation structure. The cutting mechanism is connected to the output shaft of the motor, the grass collecting bottom shell is connected to the motor, the grass collecting bottom shell has a cutting space, the cutting mechanism is placed in the cutting space, the heat dissipation structure is fixedly connected to the motor and extends at least partially into the cutting space, and the airflow generated when the cutting mechanism rotates flows through the surface of the heat dissipation structure to remove the heat from the heat dissipation structure.

[0006] In one alternative embodiment, the heat dissipation structure is fixedly connected to the end face of the motor facing the cutting mechanism and is sleeved on the outer periphery of the motor's output shaft.

[0007] In one optional embodiment, the heat dissipation structure includes a fixing part and a plurality of first heat sinks. The fixing part is connected to the motor and sleeved on the outer periphery of the motor's output shaft. The plurality of first heat sinks are circumferentially spaced on the fixing part and extend at least partially into the cutting space.

[0008] In an optional embodiment, the heat dissipation structure further includes a sleeve portion connected to the fixing portion and covering the periphery of a plurality of first heat dissipation fins; the grass collecting bottom shell has a through hole communicating with the cutting space, and the sleeve portion passes through the through hole and extends into the cutting space.

[0009] In an optional embodiment, the heat dissipation structure further includes an annular connecting portion and a plurality of second heat dissipation fins. The annular connecting portion is connected to the outer periphery of the sleeve portion, and the plurality of second heat dissipation fins are spaced apart circumferentially on the annular connecting portion and are attached to the grass collection bottom shell.

[0010] In one optional embodiment, the grass-collecting shell includes a lower shell and an upper shell. The lower shell has a cutting space, and the upper shell is connected to the outer surface of the lower shell on the side away from the cutting space. Along the axial direction of the motor's output shaft, both the lower shell and the upper shell are located on one side of the motor, with the upper shell located between the motor and the lower shell. An annular connecting portion and the upper shell and the lower shell enclose a receiving cavity for accommodating a second heat sink. And / or, along the radial direction of the motor's output shaft and toward the direction away from the motor's output shaft, at least a portion of the outer surface of the upper shell on the side away from the lower shell extends in a direction perpendicular to the axial direction of the motor's output shaft. And / or, at least a portion of the outer surface of the upper shell on the side away from the lower shell extends obliquely toward the direction close to the lower shell.

[0011] In one optional embodiment, the first heat sink has an inclined surface that is inclined relative to the axial direction of the motor's output shaft, and the inclined surfaces of the plurality of first heat sinks enclose a recessed clearance space for avoiding the cutting mechanism.

[0012] In an optional embodiment, the heat dissipation structure further includes a sleeve portion connected to the side of the fixing portion away from the first heat sink, and the sleeve portion is sleeved on the outer peripheral surface of the motor.

[0013] In an optional embodiment, a motor heat dissipation structure is further included, which includes a plurality of heat dissipation fins that are circumferentially spaced and connected to the outer surface of the support shell.

[0014] In an optional embodiment, a lifting structure is further included, which is fixedly connected to the motor or the grass collecting bottom shell to drive the motor and the grass collecting bottom shell to lift. At least part of the lifting structure is arranged around the motor, and a plurality of heat dissipation ribs are provided at intervals on the inner wall near the motor, and / or a plurality of heat dissipation ribs are provided at intervals on the outer wall away from the motor.

[0015] In one alternative embodiment, the cutting mechanism includes a cutter head and at least one blade, the cutter head being connected to the output shaft of a motor and the blade being connected to the cutter head; along the circumferential direction of the axis of the output shaft of the motor, one side of the blade is provided with a cutting edge, the blade having an upper surface facing the inside of the cutting space, the upper surface extending obliquely upward from the cutting edge toward the opposite side to generate a spiral airflow when rotating.

[0016] In one optional embodiment, the cutting space includes a spiral cavity and a grass discharge channel communicating with the spiral cavity. The cutting mechanism is located inside the spiral cavity. The airflow generated by the rotation of the cutting mechanism drives the grass clippings to accelerate inside the spiral cavity and then discharge them through the grass discharge channel. The grass discharge channel has an open slot on the side away from the motor along the grass discharge direction.

[0017] The beneficial effects of the lawn mowing robot provided in this application are as follows: Compared with the prior art, the lawn mowing robot of this application embodiment can conduct the heat generated by the motor to the cutting space by fixing the heat dissipation structure to the motor and extending it at least partially into the cutting space. The heat dissipation structure is cooled by the airflow generated when the cutting mechanism rotates, thereby efficiently removing the heat generated by the motor during operation. Active heat dissipation can be achieved without the need to add additional structures such as fans, which improves the heat dissipation efficiency of the motor, effectively reduces the motor temperature, avoids performance degradation and shutdown risks caused by overheating, extends the service life of the motor, and improves the stability and continuity of equipment operation. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of the lawnmower robot provided in the embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the lawnmower robot provided in an embodiment of this application; Figure 3 Exploded view of the lawnmower robot provided in this application embodiment Figure 1 ; Figure 4 Exploded view of the lawnmower robot provided in this application embodiment Figure 2 ; Figure 5 A cross-sectional view of the lawnmower robot provided in an embodiment of this application; Figure 6 This is an exploded structural diagram of the grass-collecting bottom shell provided in an embodiment of this application; Figure 7 Exploded view of the motor and heat dissipation structure provided in the embodiments of this application. Figure 1 ; Figure 8 Exploded view of the motor and heat dissipation structure provided in the embodiments of this application. Figure 2 ; Figure 9 Exploded view of the motor and heat dissipation structure provided in the embodiments of this application. Figure 3 ; Figure 10 This is a schematic diagram of the lifting mechanism provided in an embodiment of this application.

[0020] The following are the labeling elements in the figure: 100-Lawn mowing robot; 10-Motor; 11-Output shaft; 12-First fixing hole; 20-Cutting mechanism; 21-Blade disc; 22-Blade; 221-Cutting edge; 30-Grass collection bottom shell; 31-Lower shell; 311-Cutting space; 3111-Spiral cavity; 3112-Grass discharge channel; 3112A-Open slot; 312-Through hole; 313-First connecting hole; 32-Upper shell; 321-Accommodation cavity; 322-Outer surface; 40-Heat dissipation structure; 41-Fixing part; 411-Second fixing hole; 42-First heat sink; 421-Avoidance space; 43-Sleeve part; 44-Annular connecting part; 441-Second connecting hole; 45-Second heat sink; 46-Sleeve part; 50-Motor heat dissipation structure; 51-Bearing shell; 52-Heat dissipation fins; 60-Lifting structure; 61-Heat dissipation ribs. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Lawn mowing robots are common gardening equipment used to cut lawn vegetation. They use motors to drive blades to rotate and cut the grass layer, thus smoothing the lawn surface.

[0026] For lawnmower robots with grass collection capabilities, the cut grass clippings need to be transported to the collection frame. Therefore, a motor typically drives the blades to rotate at high speed to generate sufficient airflow to assist in the discharge and collection of the clippings. This process requires the motor to output significant power, resulting in a substantial increase in heat generation during operation. Compared to lawnmower robots without grass collection capabilities, the motors of these devices experience higher heat loads, which can negatively impact the equipment's lifespan and operational efficiency. Therefore, there is an urgent need to provide a lawnmower robot that can effectively improve motor heat dissipation performance.

[0027] Please refer to the following: Figures 1 to 10 The lawnmower robot 100 provided in this application embodiment will now be described. The lawnmower robot 100 includes a motor 10, a cutting mechanism 20, a grass collecting bottom shell 30, and a heat dissipation structure 40. The cutting mechanism 20 is connected to the output shaft 11 of the motor 10, and the grass collecting bottom shell 30 is connected to the motor 10. The grass collecting bottom shell 30 has a cutting space 311, and the cutting mechanism 20 is placed in the cutting space 311. The heat dissipation structure 40 is fixedly connected to the motor 10 and extends at least partially into the cutting space 311. The airflow generated when the cutting mechanism 20 rotates flows through the surface of the heat dissipation structure 40 to remove the heat from the heat dissipation structure 40.

[0028] The motor 10 is a power device used to drive the cutting mechanism 20 to rotate. Specifically, it can be a DC motor 10 or an AC motor 10, etc., to provide the kinetic energy required for cutting grass blades.

[0029] The cutting mechanism 20 is used for shearing grass, and can specifically employ a rotating blade 22 or a cutting device with a blade disc 21. The cutting mechanism 20 is connected to the output shaft 11 of the motor 10 to receive power. When using a cutting device with a blade disc 21, the blade disc 21 can be disc-shaped and connected to the output shaft 11 of the motor 10 via a transmission component.

[0030] The grass collecting shell 30 is used to house the cutting mechanism 20 and collect grass clippings. The cutting space 311 formed inside it is used to temporarily store the cut grass clippings, and the grass clippings are discharged from the outlet under the airflow generated by the rotation of the cutting mechanism 20. The grass collecting shell 30 is fixed below the motor 10, that is, it is set closer to the working surface than the motor 10.

[0031] A heat dissipation structure 40 is provided on the motor 10, which is used to conduct and dissipate the heat of the generator 10. The heat dissipation structure 40 extends into the cutting space 311 of the grass collecting bottom shell 30, and the airflow generated when the cutting mechanism 20 rotates dissipates heat from the heat dissipation structure 40.

[0032] The heat dissipation structure 40 can be configured as heat dissipation fins, a perforated metal plate, or a heat dissipation shroud that matches the shape of the base shell 30. The heat dissipation structure 40 can be made of metal materials, such as aluminum alloy or copper alloy, which have good thermal conductivity.

[0033] The heat dissipation structure 40 is in direct contact with the motor 10, thus quickly conducting the heat generated by the motor 10. The rotation of the cutting mechanism 20 generates airflow, which flows over the surface of the heat sink, carrying away the heat absorbed by the heat sink, thereby achieving effective heat dissipation for the motor 10. By combining the heat dissipation structure 40 with the airflow path generated by the rotation of the cutting mechanism 20, there is no need to add an additional cooling fan or other cooling structure, simplifying the structure while achieving effective heat dissipation.

[0034] When the lawnmower robot 100 is working, the motor 10 directly drives the cutting mechanism 20 to rotate. The heat generated by the motor 10 is conducted to the cutting space 311 of the grass collecting bottom shell 30 through the heat dissipation structure 40. The airflow generated by the rotation of the cutting mechanism 20 can directly flow over the surface of the heat dissipation structure 40, carrying away the heat from the heat dissipation structure 40 and improving heat dissipation efficiency. In addition, when the grass collecting bottom shell 30 is an open shell, the heat can be directly dissipated into the air; when the grass collecting bottom shell 30 is a closed shell with only an outlet, the heat is discharged from the outlet with the airflow.

[0035] Compared with the prior art, the lawnmower robot 100 provided in this application embodiment can conduct the heat generated by the motor 10 to the cutting space 311 by fixing the heat dissipation structure 40 to the motor 10 and at least partially extending it into the cutting space 311. The heat dissipation structure 40 is cooled by the airflow generated when the cutting mechanism 20 rotates, thereby efficiently removing the heat generated by the motor 10 during operation. Active heat dissipation can be achieved without the need for additional structures such as fans, which improves the heat dissipation efficiency of the motor 10, effectively reduces the temperature of the motor 10, avoids performance degradation and shutdown risks caused by overheating, extends the service life of the motor 10, and improves the stability and continuity of equipment operation.

[0036] In addition, the lawnmower robot 100 also includes, but is not limited to, the following structures: a walking mechanism for the robot's movement; a grass collection frame connected to the outlet of the grass collection bottom shell 30 for collecting grass clippings; an electrical system that provides the robot with energy and control; a navigation system for autonomous walking; and a software system for intelligent operation.

[0037] Please refer to some embodiments of this application. Figure 5 , Figure 7-9 The heat dissipation structure 40 is fixedly connected to the end face of the motor 10 facing the cutting mechanism 20, and is sleeved on the outer periphery of the output shaft 11 of the motor 10.

[0038] The fixed connection adopts an end-face contact method and can be rigidly fixed by welding or using fasteners (such as bolts) to ensure that the heat dissipation structure 40 and the motor 10 housing form a surface contact heat transfer path, achieving a tight connection between the heat dissipation structure 40 and the motor 10 and improving heat conduction efficiency. Furthermore, a hole with a diameter slightly larger than the outer diameter of the motor 10 output shaft 11 is provided in the middle of the heat dissipation structure 40 to allow the motor 10 output shaft 11 to pass through.

[0039] The heat dissipation structure 40 is fitted around the outer periphery of the output shaft 11 without affecting its normal operation. The heat generated by the motor 10 during operation is directly transferred to the heat dissipation structure 40 through end-face contact, and then conducted into the cutting space 311, making full use of the airflow generated during cutting for heat dissipation. This arrangement simplifies the structure, saves space, improves heat dissipation, and extends the service life of the motor 10.

[0040] Please refer to some embodiments of this application. Figure 7 The heat dissipation structure 40 includes a fixing part 41 and a plurality of first heat sinks 42. The fixing part 41 is connected to the motor 10 and sleeved on the outer periphery of the output shaft 11 of the motor 10. The plurality of first heat sinks 42 are spaced apart on the fixing part 41 in the circumferential direction and extend at least partially into the cutting space 311.

[0041] The fixing part 41 can be connected to the end face or outer peripheral surface of the motor 10, and can be fixed to it by welding or threaded connection. The fixing part 41 is provided with holes so as to fit over the output shaft 11 of the motor 10. The fixing part 41 and the first heat sink 42 can be made of metal materials, such as aluminum alloy, to improve thermal conductivity and heat dissipation efficiency.

[0042] Multiple first heat sinks 42 are distributed circumferentially at intervals, allowing airflow to pass through the gaps between adjacent heat sinks, increasing the contact area between the airflow and the heat sinks, and forming heat dissipation channels. The multiple first heat sinks 42 can be evenly distributed circumferentially or unevenly distributed as needed. The portion of the first heat sink 42 extending into the cutting space 311 is directly located in the airflow path generated by the rotation of the cutting mechanism 20, thus achieving heat exchange through the contact between the airflow and the surface of the first heat sink 42.

[0043] The first heat sink 42 can be fixed to the fixing part 41 by welding or bolting, or it can be integrally formed with the fixing part 41. The first heat sink 42 can be a sheet structure, a block structure, or a curved surface structure. The number of first heat sinks 42 can be set according to actual needs, for example, 10-30 can be set. The specific size of the first heat sink 42 can be adjusted according to the size of the cutting space 311 to ensure sufficient heat dissipation area.

[0044] The first heat sink 42 extends at least partially into the cutting space 311. The first heat sink 42 can be located above (away from the working surface) or to the side of the rotating plane of the cutting mechanism 20, without affecting the normal operation of the cutting mechanism 20. The airflow generated when the cutting mechanism 20 rotates can flow directly over the surface of the first heat sink 42, accelerating the dissipation of heat.

[0045] By designing multiple first heat sinks 42, the heat dissipation area is increased, further improving heat dissipation efficiency. The heat dissipation structure 40 can achieve better heat dissipation within a limited space, which helps to extend the service life of the motor 10 and improve the working efficiency and reliability of the lawnmower robot 100.

[0046] Please refer to some embodiments of this application. Figures 7 to 9 The fixing part 41 is fixed to the end face of the motor 10 facing the cutting mechanism 20 by a connector (not shown in the figure). The end face of the motor 10 facing the cutting mechanism 20 is provided with a first fixing hole 12 for the connector to pass through, and the fixing part 41 is provided with a corresponding second fixing hole 411 for the connector to pass through.

[0047] Axial locking is achieved by connecting the first fixing hole 12 on the end face of the motor 10 and the second fixing hole 411 on the fixing part 41. Heat conduction is carried out through end face contact, which can improve heat conduction efficiency.

[0048] When the motor 10 is running, the heat dissipation structure 40 will be impacted by the vibration of the motor 10 and the airflow generated by the rotation of the cutting mechanism 20. By firmly connecting the fixing part 41 to the motor 10, the loosening or displacement of the heat dissipation structure 40 caused by high-frequency vibration can be reduced, ensuring the stability of the heat conduction path between the first heat sink 42 and the motor 10, and improving the heat dissipation effect.

[0049] Please refer to some embodiments of this application. Figure 3-5 , Figure 7 The heat dissipation structure 40 also includes a sleeve portion 43, which is connected to the fixing portion 41 and covers the periphery of the first heat dissipation fin 42; the grass collection bottom shell 30 has a through hole 312 communicating with the cutting space 311, and the sleeve portion 43 passes through the through hole 312 and extends into the cutting space 311.

[0050] Since multiple first heat sinks 42 are arranged at circumferential intervals, the sleeve portion 43 can correspondingly adopt a cylindrical structure to facilitate covering the periphery of the multiple first heat sinks 42. The height of the sleeve portion 43 can also be designed to be greater than the height of the first heat sinks 42, so that it can completely cover the first heat sinks 42. The sleeve portion 43 and the fixing portion 41 can be connected by means of threads or welding, or it can be integrally formed with the fixing portion 41.

[0051] The through hole 312 can be set at the center of the grass collecting bottom shell 30, and its diameter is slightly larger than the outer diameter of the sleeve part 43 so that the sleeve part 43 can pass through. After the sleeve part 43 passes through the through hole 312, its lower end can extend into the cutting space 311 a certain distance, and the end of the sleeve maintains a safe distance from the cutting mechanism 20 to avoid collision.

[0052] The sleeve portion 43 forms an annular channel that wraps around the first heat sink 42. The airflow generated by the cutting mechanism 20 during rotation can enter the internal cavity of the sleeve portion 43 and form a spiral airflow path along the inner wall of the sleeve portion 43. When flowing over the surface of the first heat sink 42, the airflow contact time can be extended by passing through the sleeve portion 43. At the same time, the sleeve portion 43 itself can also be made of metal materials (such as aluminum alloy), which can increase the heat dissipation area and further improve the heat dissipation effect.

[0053] Please refer to some embodiments of this application. Figures 5 to 7 The heat dissipation structure 40 also includes an annular connecting part 44 and a plurality of second heat dissipation fins 45. The annular connecting part 44 is connected to the outer periphery of the sleeve part 43, and the plurality of second heat dissipation fins 45 are spaced apart on the annular connecting part 44 in the circumferential direction and are attached to the grass collecting bottom shell 30.

[0054] The annular connecting portion 44 is connected to the outer periphery of the sleeve portion 43 but does not extend into the cutting space 311. The connection between the annular connecting portion 44 and the sleeve portion 43 can be welding or integral connection. The annular connecting portion 44 can be made of metal material, such as aluminum alloy or copper alloy.

[0055] The second heat sink 45 can be a sheet-like structure, fixed to the annular connecting part 44 by welding or integral molding. The number of the second heat sink 45 can be set according to actual needs.

[0056] The second heat sink 45 can form a contact fit with the grass collecting base shell 30. Multiple second heat sinks 45 are evenly distributed in the circumference to form an annular heat dissipation band. The heat of the motor 10 is conducted to the second heat sink 45 through the fixing part 41 and the annular connecting part 44, and then to the grass collecting base shell 30. The airflow generated by the rotation of the cutting mechanism 20 can dissipate heat from the grass collecting base shell 30, thereby further dissipating heat from the motor 10 and improving the heat dissipation efficiency.

[0057] In addition, the second heat sink 45 can enhance the overall strength of the heat dissipation structure 40 and improve the durability of the lawnmower robot 100.

[0058] Please refer to some embodiments of this application. Figure 6 and Figure 7The annular connecting part 44 is fixed to the grass collecting bottom shell 30 by fasteners (not shown in the figure). The end face of the grass collecting bottom shell 30 near the annular connecting part 44 is provided with a first connecting hole 313 for the fastener to pass through, and the annular connecting part 44 is provided with a corresponding second connecting hole 441 for the fastener to pass through.

[0059] The first connecting hole 313 and the second connecting hole 441 are aligned, and the fasteners can be bolts or screws, etc. The fasteners pass through the first connecting hole 313 and the second connecting hole 441 in sequence, fixing the annular connecting part 44 to the grass collecting base shell 30, forming a stable connection between the annular connecting part 44 and the grass collecting base shell 30, improving the overall stability of the heat dissipation structure 40 connection. It also ensures that the heat from the motor 10 is conducted to the grass collecting base shell 30 through the contact surface.

[0060] Fasteners enhance the reliability of the heat dissipation structure 40 connection, preventing it from loosening or falling off during the operation of the lawnmower robot 100. Simultaneously, the placement of the first connecting hole 313 and the second connecting hole 441 facilitates the installation and removal of fasteners, benefiting the installation and maintenance of the heat dissipation structure 40. The tight connection between the annular connecting part 44 and the grass collecting bottom shell 30 ensures good heat conduction between the heat dissipation structure 40 and the grass collecting bottom shell 30, contributing to improved heat dissipation efficiency.

[0061] Please refer to some embodiments of this application. Figure 5 and Figure 6 The grass collection shell 30 includes a lower shell 31 and an upper shell 32. The lower shell 31 is provided with a cutting space 311, and the upper shell 32 is connected to the outer surface of the lower shell 31 away from the cutting space 311. Along the axial direction of the output shaft 11 of the motor 10, the lower shell 31 and the upper shell 32 are both located on one side of the motor 10, and the upper shell 32 is located between the motor 10 and the lower shell 31. The annular connecting part 44, the upper shell 32 and the lower shell 31 enclose and form a receiving cavity 321 for accommodating the second heat sink 45.

[0062] The lower shell 31 is provided with a cutting space 311 for mounting the cutting mechanism 20. The upper shell 32 is connected to the side of the lower shell 31 away from the cutting space 311 and covers the outer surface of the lower shell 31, forming a double-shell structure. The connection between the upper shell 32 and the lower shell 31 can be achieved by welding, threaded connection, or snap-fit ​​connection, etc.

[0063] The annular connecting part 44, the upper shell 32, and the lower shell 31 enclose each other to form a receiving cavity 321, which can be a closed or semi-closed cavity. The size of the receiving cavity 321 matches the shape of the second heat sink 45, so that the second heat sink 45 is wrapped inside the receiving cavity 321.

[0064] The design of the upper shell 32 can isolate the second heat sink 45 from the external environment, preventing grass clippings from accumulating and adhering to the surface of the second heat sink 45.

[0065] The surface of the second heat sink 45 can contact the wall of the lower shell 31 or the upper shell 32. Heat is transferred to the lower shell 31 through the contact surface and can be dissipated by the airflow generated by the rotating mechanism. Heat is transferred to the upper shell 32 through the contact surface and can be exchanged with the external natural airflow through convection, continuously dissipating heat into the environment and significantly improving the overall heat dissipation efficiency.

[0066] In some embodiments, such as Figure 5 and Figure 6 At least a portion of the outer surface 322 of the upper housing 32, on the side away from the lower housing 31, extends in a direction perpendicular to the axis of the output shaft 11 of the motor 10, radially away from the output shaft 11 of the motor 10. This extension of the outer surface 322 in a direction perpendicular to the axis of the output shaft 11 increases the horizontal area of ​​the upper housing 32, preventing the formation of recesses or sharp protrusions, reducing the risk of entanglement of grass clippings, etc., and providing a smooth transition that facilitates the guidance of rainwater and grass clippings to the edges, reducing accumulation at the top.

[0067] In other embodiments, such as Figure 5 and Figure 6 At least a portion of the outer surface 322 of the upper shell 32, on the side away from the lower shell 31, extends obliquely in a direction close to the lower shell 31, radially along the output shaft 11 of the motor 10 and toward the direction away from the output shaft 11 of the motor 10. This allows the outer surface 322 to form a slope, specifically an oblique conical surface, a smoothly transitioned arc surface, or a combination of multiple oblique planes. This design facilitates the rapid sliding off of rainwater and grass clippings, preventing accumulation on the outer surface 322. Simultaneously, the downward oblique extension effectively guides airflow, reducing the resistance of the outer surface 322 of the upper shell 32, making the movement of the lawnmower robot 100 smoother.

[0068] In some other embodiments, such as Figure 5 and Figure 6 Along the radial direction of the output shaft 11 of the motor 10 and toward a direction away from the output shaft 11, a portion of the outer surface 322 of the upper shell 32 on the side away from the lower shell 31 extends in a direction perpendicular to the axis of the output shaft 11 of the motor 10, and a portion extends obliquely toward the direction close to the lower shell 31. The outer surface 322 of the upper shell 32 extends horizontally (perpendicular to the axis of the output shaft 11 of the motor 10) and obliquely downward (towards the lower shell 31), forming a composite surface structure with a smooth transition. This facilitates the continuous sliding of rainwater and grass clippings from the top to the edge, preventing accumulation on the outer surface 322. The horizontal section provides a stable transition, while the oblique section accelerates grass and water drainage, improving the overall self-cleaning ability, preventing clogging of the grass collecting bottom shell 30, and enhancing the structural strength of the grass collecting bottom shell 30.

[0069] Please refer to some embodiments of this application. Figure 5 and Figure 7 The first heat sink 42 has an inclined surface that is inclined relative to the axial direction of the output shaft 11 of the motor 10. The inclined surfaces of multiple first heat sinks 42 surround and form a recessed clearance space 421 for clearance of the cutting mechanism 20.

[0070] The tilt angle of the inclined surface is designed to match the structure of the cutting mechanism 20, for example, it can be an angle between 30° and 60°. The inclined surface of the first heat sink 42 can be planar or curved. The shape of the clearance space 421 can be designed to match the cutting mechanism 20, for example, it can be frustum-shaped (e.g., Figure 5 (As shown), conical or hemispherical.

[0071] The inner wall contour of the clearance space 421 maintains a distance from the outer contour of the cutting mechanism 20 to avoid contact friction. When the cutting mechanism 20 rotates around the output shaft 11, its outer edge trajectory forms a non-contact engagement with the inner wall of the clearance space 421 enclosed by the inclined surface. The inclined surface guides the airflow tangentially along the surface of the first heat sink 42, enhancing the convective heat dissipation efficiency. Furthermore, the clearance space 421 can also guide the airflow to flow better across the surface of the first heat sink 42, further enhancing the heat dissipation effect.

[0072] By providing an inclined surface on the first heat sink 42 and having the inclined surfaces of multiple first heat sinks 42 enclose a recessed clearance space 421, interference between the first heat sink 42 and the cutting mechanism 20 can be effectively avoided. Therefore, the heat dissipation structure 40 can be positioned closer to the cutting mechanism 20, improving heat dissipation performance.

[0073] Please refer to some embodiments of this application. Figure 7 and Figure 8 The heat dissipation structure 40 also includes a sleeve part 46, which is connected to the side of the fixing part 41 away from the first heat sink 42, and the sleeve part 46 is sleeved on the outer peripheral surface of the motor 10.

[0074] The sleeve portion 46 is fitted onto the outside of the motor 10, and the shape of the sleeve portion 46 matches the outer periphery of the motor 10. For example... Figure 8 The sleeve portion 46 is generally annular in structure so as to fit against the outer peripheral surface of the cylindrical motor 10, thereby increasing the contact area with the motor 10. The axial dimension of the sleeve portion 46 can be set according to the heat dissipation requirements, such as extending along the axial direction of the motor 10 to cover a quarter of the outer surface of the motor 10.

[0075] By providing the sleeve portion 46, the contact area between the heat dissipation structure 40 and the motor 10 is effectively increased, improving heat conduction efficiency. This, in turn, allows for better heat dissipation of the motor 10 through other parts of the heat dissipation structure 40 (such as the fixing portion 41 and the first heat sink 42), thus ensuring the stability and reliability of the lawnmower robot 100's operation. Simultaneously, the sleeve portion 46, fitted onto the outer circumference of the motor 10, facilitates the positioning and installation of the heat dissipation structure 40 and the motor 10.

[0076] Please refer to some embodiments of this application. Figure 1 and Figure 9 It also includes a motor heat dissipation structure 50, which includes multiple heat dissipation fins 52, which are circumferentially spaced on the outer surface of the motor 10.

[0077] By setting multiple heat dissipation fins 52 on the outer periphery of the motor 10, the heat dissipation area of ​​the motor 10 can be increased, and heat exchange with the external airflow can be carried out, effectively reducing the operating temperature of the motor 10.

[0078] The motor heat dissipation structure 50 is located on the outer periphery of the motor 10. Its placement does not affect the overall structure of the lawnmower robot 100 and is easy to install and maintain. Furthermore, the heat dissipation performance of the motor 10 is improved, extending the machine's service life.

[0079] The heat dissipation fins 52 are plate-shaped and extend radially outward along the motor 10, evenly distributed on the outer surface of the motor 10. The number of heat dissipation fins 52 can be set according to actual needs, such as 15-40. The height of the heat dissipation fins 52 can be set according to the height of the motor 10. The heat dissipation fins 52 can be made of metal materials, such as aluminum alloy or copper alloy, which have good thermal conductivity.

[0080] The motor heat dissipation structure 50 can be directly connected to the motor 10, or it can be formed on the bearing shell 51 connected to the outside of the motor 10.

[0081] In some embodiments, such as Figure 9 A support shell 51 is provided, which is fixed to the outer periphery of the motor 10. Multiple heat dissipation fins 52 are connected to the outer surface of the support shell 51. The support shell 51 and the heat dissipation fins 52 can be welded or integrally die-cast to ensure heat conduction efficiency. The support shell 51 is fixed to the outer periphery of the motor 10, and the fixing method can be a snap-fit ​​connection or a bolt connection. The support shell 51 can be designed as a cylinder, and its inner diameter matches the outer diameter of the motor 10. The support shell 51 tightly wraps around the outer periphery of the motor 10, which can directly conduct the heat generated by the motor 10 during operation to the array of heat dissipation fins 52, increasing the heat dissipation area of ​​the motor 10 and effectively reducing the operating temperature of the motor 10.

[0082] Please refer to some embodiments of this application. Figure 1 and Figure 10It also includes a lifting structure 60, which is fixedly connected to the motor 10 or the grass collecting bottom shell 30 to drive the motor 10 and the grass collecting bottom shell 30 to lift. At least a portion of the lifting structure 60 is arranged around the motor 10, and a plurality of heat dissipation ribs 61 are provided at intervals on the inner wall near the motor 10, and / or a plurality of heat dissipation ribs 61 are provided at intervals on the outer wall away from the motor 10.

[0083] The lifting structure 60 can be connected to the motor 10 or the grass collecting bottom shell 30. The lifting structure 60 drives the motor 10 and the grass collecting bottom shell 30 to rise and fall, which in turn drives the cutting mechanism 20 to rise and fall together.

[0084] In some embodiments, a plurality of heat dissipation ribs 61 are distributed circumferentially along the inner wall of the lifting structure 60, forming a heat dissipation channel surrounding the motor 10. The heat dissipation ribs 61 always maintain a fixed distance from the outer periphery of the motor 10.

[0085] In other embodiments, the lifting structure 60 is provided with a plurality of heat dissipation ribs 61 spaced circumferentially on the outer wall away from the motor 10, which can increase the heat dissipation area, improve the heat exchange efficiency with the outside air, thereby improving the heat dissipation effect of the motor 10, and also enhance the structural strength.

[0086] In some other embodiments, the lifting structure 60 has multiple heat dissipation ribs 61 spaced apart on its inner wall near the motor 10, and also multiple heat dissipation ribs 61 spaced apart on its outer wall away from the motor 10. This achieves coordinated heat dissipation from both inside and outside, significantly improving overall heat dissipation efficiency.

[0087] During the lifting process, the heat dissipation ribs 61 can continuously contact the airflow generated by the lifting structure 60 to improve the heat dissipation effect. When not lifting, they can also conduct heat from the heat dissipation structure 40, increasing the heat dissipation effect of the heat dissipation structure 40, and thus better dissipating heat from the motor 10.

[0088] Without adding additional heat dissipation components, the existing structure is fully utilized to achieve heat dissipation, which simplifies the structural design, improves space utilization, and effectively reduces the operating temperature of the motor 10, thus extending the service life of the motor 10.

[0089] Please refer to some embodiments of this application. Figure 2 and Figure 3 The cutting mechanism 20 includes a cutter head 21 and at least one blade 22. The cutter head 21 is connected to the output shaft 11 of the motor 10, and the blade 22 is connected to the cutter head 21. Along the circumferential direction of the axis of the output shaft 11 of the motor 10, one side of the blade 22 is provided with a cutting edge 221. The blade 22 has an upper surface facing the inside of the cutting space 311. The upper surface extends obliquely upward from the cutting edge 221 toward the opposite side to generate a spiral airflow when rotating.

[0090] The cutter head 21 is connected to the output shaft 11 of the motor 10. The cutter head 21 is used to mount the blades 22 so that the motor 10 drives the cutter head 21 to rotate the blades 22 for mowing. The number of blades 22 can be one, two, or more. In some embodiments, such as... Figure 3 As shown, there are three blades 22, which are evenly spaced along the circumference of the cutter head 21.

[0091] The upper surface of the blade 22 is the surface facing the inside of the cutting space 311 (away from the working surface) after the blade 22 is installed on the cutter head 21. A cutting edge 221 is provided on one side of the blade 22 along the circumferential direction of the output shaft 11 of the motor 10 (i.e., the rotation direction of the cutter head 21). The upper surface of the blade 22 is designed to extend upwards at an angle from one side of the cutting edge 221 to the opposite side. When the cutter head 21 rotates at high speed, the upper surface of the blade 22 can effectively guide and push the air, forming a stable and directional spiral airflow. This can quickly guide the cut grass clippings upwards and outwards from the cutting space 311, accelerating their movement along the guide path within the grass collecting bottom shell 30, and discharging them from the outlet of the grass collecting bottom shell 30, thus improving grass collecting efficiency and reducing grass clipping blockage or residue.

[0092] As the cutter head 21 and the blade 22 rotate, the resulting airflow can also cool the heat dissipation structure 40, thereby efficiently removing the heat generated by the motor 10 during operation.

[0093] The upper surface of the blade 22 can be a plane or a curved surface. In some embodiments, such as... Figure 3 The upper surface of the blade 22 is set as an arc-shaped raised surface. The smooth arc surface allows the airflow to pass through the surface of the blade 22 more smoothly, significantly reducing the pressure difference and air turbulence between the front and rear of the blade 22, and reducing the aerodynamic noise that may be generated when the blade 22 is running.

[0094] Please refer to some embodiments of this application. Figures 1 to 5 The cutting space 311 includes a spiral cavity 3111 and a grass discharge channel 3112 connected to the spiral cavity 3111. The cutting mechanism 20 is located in the spiral cavity 3111. The airflow generated by the rotation of the cutting mechanism 20 drives the grass clippings to accelerate in the spiral cavity 3111 and then discharge them through the grass discharge channel 3112. The grass discharge channel 3112 has an open groove 3112A on the side away from the motor 10 along the grass discharge direction.

[0095] The spiral cavity 3111 is an annular cavity, and a spiral airflow channel can be formed between its inner wall and the rotation trajectory of the cutting mechanism 20. The grass discharge channel 3112 is a tubular structure extending outward from the end of the spiral cavity 3111, and its axial direction is roughly consistent with the tangential direction of the spiral cavity 3111. The open slot 3112A on the grass discharge channel 3112 is an axially oriented notch opened on the side wall of the grass discharge channel 3112. In addition, the grass discharge channel 3112 can be gradually enlarged along the spiral cavity 3111 towards the outlet.

[0096] When the cutting mechanism 20 rotates, the blade 22 carries the grass clippings into the spiral cavity 3111. The annular structure of the spiral cavity 3111 causes the grass clippings to accelerate along the spiral path with the airflow. Under the action of centrifugal force, the grass clippings are thrown towards the outer wall of the spiral cavity 3111. After the grass clippings enter the grass discharge channel 3112 with the airflow, they move along the axial direction of the grass discharge channel 3112 and are then discharged from the outlet of the grass discharge channel 3112.

[0097] The spiral cavity 3111 design accelerates the discharge of grass clippings, improving discharge efficiency. The open trough 3112A prevents clogging of the discharge channel 3112, ensuring the continuous and stable operation of the mowing robot 100. Simultaneously, the open structure facilitates cleaning and maintenance, extending the equipment's lifespan.

[0098] In addition, the spiral cavity 3111 can also be configured as a semi-open cavity to avoid grass clippings from accumulating and to enhance heat dissipation.

[0099] 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 robot, characterized in that, include: Electric motor; A cutting mechanism, wherein the cutting mechanism is connected to the output shaft of the motor; A grass-collecting bottom shell is connected to the motor, and the grass-collecting bottom shell has a cutting space, with the cutting mechanism placed within the cutting space; as well as A heat dissipation structure is fixedly connected to the motor and extends at least partially into the cutting space. The airflow generated when the cutting mechanism rotates flows over the surface of the heat dissipation structure to remove the heat from the structure.

2. The lawnmower robot as described in claim 1, characterized in that, The heat dissipation structure is fixedly connected to the end face of the motor facing the cutting mechanism and is sleeved on the outer periphery of the output shaft of the motor.

3. The lawnmower robot as described in claim 2, characterized in that, The heat dissipation structure includes a fixing part and a plurality of first heat sinks. The fixing part is connected to the motor and sleeved on the outer periphery of the output shaft of the motor. The plurality of first heat sinks are circumferentially spaced on the fixing part and extend at least partially into the cutting space.

4. The lawnmower robot as described in claim 3, characterized in that, The heat dissipation structure further includes a sleeve portion, which is connected to the fixing portion and covers the periphery of the plurality of first heat dissipation fins; The bottom shell of the grass collection is provided with a through hole that communicates with the cutting space, and the sleeve part passes through the through hole and extends into the cutting space.

5. The lawnmower robot as described in claim 4, characterized in that, The heat dissipation structure further includes an annular connecting part and a plurality of second heat dissipation fins. The annular connecting part is connected to the outer periphery of the sleeve part, and the plurality of second heat dissipation fins are spaced apart circumferentially on the annular connecting part and are attached to the grass collecting bottom shell.

6. The lawnmower robot as described in claim 5, characterized in that, The grass-collecting shell includes a lower shell and an upper shell. The lower shell is provided with the cutting space, and the upper shell is connected to the outer surface of the lower shell on the side away from the cutting space. Along the axial direction of the output shaft of the motor, both the lower shell and the upper shell are located on one side of the motor, and the upper shell is located between the motor and the lower shell. The annular connecting portion, the upper shell, and the lower shell enclose a cavity for accommodating the second heat sink, and / or, along the radial direction of the motor's output shaft and toward a direction away from the motor's output shaft, at least a portion of the outer surface of the upper shell on the side away from the lower shell extends in a direction perpendicular to the axis of the motor's output shaft, and / or, at least a portion of the outer surface of the upper shell on the side away from the lower shell extends obliquely toward the direction close to the lower shell.

7. The lawnmower robot as described in claim 3, characterized in that, The first heat sink has an inclined surface that is inclined relative to the axial direction of the output shaft of the motor. The inclined surfaces of the plurality of first heat sinks enclose a recessed clearance space for avoiding the cutting mechanism.

8. The lawnmower robot as described in claim 3, characterized in that, The heat dissipation structure further includes a sleeve portion, which is connected to the side of the fixing portion away from the first heat sink, and the sleeve portion is sleeved on the outer peripheral surface of the motor.

9. The lawnmower robot as described in any one of claims 1 to 8, characterized in that, It also includes a motor heat dissipation structure, which includes multiple heat dissipation fins that are circumferentially spaced and connected to the outer surface of the motor.

10. The lawnmower robot as described in any one of claims 1 to 8, characterized in that, It also includes a lifting structure, which is fixedly connected to the motor or the grass collecting bottom shell to drive the motor and the grass collecting bottom shell to lift. At least a portion of the lifting structure is arranged around the motor, and multiple heat dissipation ribs are spaced apart on the inner wall near the motor, and / or multiple heat dissipation ribs are spaced apart on the outer wall away from the motor.

11. The lawnmower robot as described in any one of claims 1 to 8, characterized in that, The cutting mechanism includes a cutter head and at least one blade, the cutter head being connected to the output shaft of the motor, and the blade being connected to the cutter head; Along the circumferential direction of the axis of the output shaft of the motor, one side of the blade is provided with a cutting edge, and the blade has an upper surface facing the inside of the cutting space. The upper surface extends obliquely upward from the cutting edge toward the opposite side to generate a spiral airflow when rotating.

12. The lawnmower robot as described in any one of claims 1 to 8, characterized in that, The cutting space includes a spiral cavity and a grass discharge channel communicating with the spiral cavity. The cutting mechanism is located in the spiral cavity. The airflow generated by the rotation of the cutting mechanism drives the grass clippings to accelerate in the spiral cavity and then discharge them through the grass discharge channel. The grass discharge channel has an open slot on the side away from the motor along the grass discharge direction.

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