Lawn mower

Abstract

The application relates to the technical field of lawn mowers, in particular to a lawn mower. The lawn mower comprises a shell, a buffer assembly and a sensing assembly. The shell is provided with a containing cavity. The buffer assembly is movably arranged in the containing cavity and partially surrounds the outer periphery of the shell. The buffer assembly is provided with a magnetic piece. The buffer assembly is used for moving under the action of external force to drive the magnetic piece to move relative to the shell. The sensing assembly is arranged on the shell and is used for detecting the movement of the magnetic piece. In the process of advancing the lawn mower, the buffer assembly arranged on the outer periphery of the shell can collide with the hard solid in front of the shell earlier than the shell, can absorb part of the impact force and reduce the impact influence on the shell and the sensing assembly. When the buffer assembly collides and drives the magnetic piece to move relative to the shell, the distance between the magnetic piece and the sensing assembly changes, causing the change of the magnetic field intensity. The sensing assembly converts the changed magnetic signal into an electric signal and transmits the electric signal to the lawn mower, and controls the lawn mower to avoid obstacles.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and in particular to a lawnmower. Background Technology

[0002] The lawn mowing area contains hard obstacles such as rocks, trees, fences, and walls. During the mowing process, the lawnmower's outer shell may collide directly with the obstacles, causing damage to the outer shell and the front-end sensing components, which in turn will affect the normal use of the lawnmower. Summary of the Invention

[0003] Therefore, it is necessary to address the problem that direct collisions between the lawnmower's casing and obstacles can damage the casing and front-end sensing components, thus affecting the normal operation of the lawnmower. The lawnmower includes:

[0004] The housing has a receiving cavity;

[0005] A buffer assembly, movably disposed in the receiving cavity and partially surrounding the outer periphery of the housing, the buffer assembly having a magnetic element, the buffer assembly being used to move under the action of an external force to drive the magnetic element to move relative to the housing; and a sensing assembly, disposed in the housing, the sensing assembly being used to detect the movement of the magnetic element.

[0006] In one embodiment, the buffer assembly includes an energy-absorbing box and an elastic element. The energy-absorbing box is clearance-fitted with the housing. The outline dimension of the receiving cavity is larger than the outline dimension of the energy-absorbing box, so that the energy-absorbing box can move in the receiving cavity. The energy-absorbing box is provided with the magnetic element. The elastic element is located in the receiving cavity. One end of the elastic element is connected to the energy-absorbing box, and the other end is connected to the housing.

[0007] In one embodiment, the housing includes a front shell and a rear plate connected to each other, the receiving cavity is formed between the front shell and the rear plate, the front shell has a through hole communicating with the receiving cavity, the rear plate has an opening communicating with the receiving cavity, the sensing component is disposed on the rear plate, the energy absorbing box passes through the through hole and enters the receiving cavity, when the energy absorbing box moves toward the rear plate under the action of an external force, the magnetic element is exposed through the opening and generates a sense with the sensing component.

[0008] In one embodiment, the front shell has a first cavity, the rear plate has a second cavity, the first cavity and the second cavity are connected to form the receiving cavity, the through hole communicates with the first cavity, the opening communicates with the second cavity, the energy-absorbing box includes a movable part and an abutting part connected to each other, the outline dimension of the first cavity is larger than the outline dimension of the movable part and smaller than the outline dimension of the abutting part, and the outline dimension of the second cavity is larger than the outline dimension of the abutting part.

[0009] In one embodiment, the sensing component is a Hall sensor located in a direction perpendicular to the opening, and the Hall sensor responds individually to the magnetic element exposing the opening.

[0010] In one embodiment, the energy-absorbing box is provided with a first guide post, the housing is provided with a second guide post, the first guide post is provided with a hollow portion, the radial dimension of the hollow portion is larger than the radial dimension of the second guide post, the first guide post is movably sleeved on the second guide post, and the elastic element is simultaneously disposed on the outer periphery of the first guide post and the second guide post.

[0011] In one embodiment, the buffer assembly further includes a crash beam connected to the energy-absorbing box and surrounding the outer periphery of the housing.

[0012] In one embodiment, the anti-collision beam includes a crossbeam and a side beam. The side beam includes a first side beam and a second side beam connected together. The first side beam is connected to the crossbeam at a preset angle, which is an obtuse angle. The second side beam extends toward one side of the energy-absorbing box.

[0013] In one embodiment, the buffer assembly further includes a tray, the anti-collision beam includes a support beam connected to a crossbeam, one end of the tray is connected to the bottom of the support beam, and the other end is connected to the energy-absorbing box. The outline dimensions of the portion of the tray connected to the support beam and the outline dimensions of the support beam are smaller than the outline dimensions of the receiving cavity. When the anti-collision beam is impacted, the support beam drives the energy-absorbing box to move within the receiving cavity.

[0014] In one embodiment, the lawnmower further includes a walking mechanism and a cutting mechanism, the walking mechanism and the cutting mechanism being electrically coupled to the sensing component, the sensing component being used to control the walking mechanism to turn or control the cutting mechanism to stop operating when it detects movement of the magnetic component.

[0015] The aforementioned lawnmower is equipped with a buffer component. The buffer component is located on the outer periphery of the lawnmower housing and can collide with hard solids before the housing. The buffer component's buffering effect reduces the damage to the housing and sensing components. In addition, the buffer component can move the magnetic components when subjected to external force, causing a change in the magnetic field near the sensing components. The sensing components can convert the magnetic signal into an electrical signal and transmit it to the lawnmower to control the lawnmower to avoid obstacles, further reducing the risk of collision. Attached Figure Description

[0016] Figure 1 This is a partial three-dimensional structural diagram of the lawnmower provided in the embodiments of this application.

[0017] Figure 2 for Figure 1 An exploded view of a portion of the provided lawnmower's structure.

[0018] Figure 3 for Figure 1 An exploded view of another part of the provided lawnmower structure.

[0019] Figure 4 for Figure 1 Rear view of part of the structure of a lawnmower.

[0020] Explanation of reference numerals in the attached figures:

[0021] 11. Receiving cavity; 12. Front shell; 121. Through hole; 122. First cavity; 123. Third reinforcing rib; 13. Rear plate; 131. Opening; 132. Second cavity; 14. Second guide post;

[0022] 21. Magnetic component; 22. Energy-absorbing box; 221. Moving part; 222. Abutting part; 223. First guide post; 2231. Hollow part; 224. First reinforcing rib; 225. Second reinforcing rib; 23. Elastic component; 24. Anti-collision beam; 241. Support beam; 242. Crossbeam; 243. Side beam; 25. Support plate;

[0023] 3. Sensing components; 31. Hall sensor; 311. Circuit board; 312. Hall element. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 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, and therefore should not be construed as a limitation of this application.

[0026] 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, 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 application based on the specific circumstances.

[0028] In this application, 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.

[0029] 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 intervening 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 intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] Typically, the sensors on a lawnmower are located at the front of the machine. Their primary function is to identify obstacles as the lawnmower moves forward and guide it to avoid them. During the lawnmower's movement, hard objects on the ground, such as shrubs, rocks, and tree stumps, will directly collide with the front of the lawnmower's casing, causing wear and tear on the casing and potentially damaging the sensors.

[0031] Please see Figure 1 and Figure 2 Based on this, this application provides a lawnmower, which includes a housing, a buffer assembly, and a sensing assembly 3. The housing has a receiving cavity 11, and the buffer assembly is movably disposed within the receiving cavity 11 and partially surrounds the outer periphery of the housing. Please refer to... Figure 3 The buffer assembly includes a magnetic component 21, which moves under external force to move the magnetic component 21 relative to the housing. A sensing component 3 is located on the housing and detects the movement of the magnetic component 21. During the lawnmower's forward movement, the buffer assembly on the outer periphery of the housing collides with hard solids ahead of it before the housing itself. The buffer assembly acts as a buffer, absorbing some of the impact force and reducing the impact on the housing and sensing component 3. Furthermore, after a collision, the buffer assembly receives a reaction force and moves in the opposite direction, causing the magnetic component 21 to move relative to the housing. This change in distance between the magnetic component 21 and the sensing component 3 causes a change in the magnetic field strength. The sensing component 3 converts the changing magnetic signal into an electrical signal, which is transmitted to the lawnmower to control obstacle avoidance.

[0032] For example, the magnetic component 21 may be a cylindrical magnet, a disc magnet, a square magnet, a tile magnet, etc.

[0033] For example, the buffer assembly and the housing can be movably connected via mechanisms such as a groove and rail, a groove and slider, or a spur gear and rack. For instance, a groove can be provided on the housing, and a rail can be provided on the buffer assembly, with the rail sliding within the groove to allow the buffer assembly to move within the housing. Alternatively, a slider can be provided on the buffer assembly, sliding within a groove to allow the buffer assembly to move within the housing. Yet another example is a rack on the housing and a gear on the buffer assembly, allowing the buffer assembly to slide relative to the rack via the gear. All of these mechanisms enable the buffer assembly to move smoothly within the housing under external force, making its movement more sensitive and rapid after being subjected to force.

[0034] Please see Figure 3 The buffer assembly needs to provide space for the magnetic component 21, and during a collision, it needs to protect the magnetic component 21 from damage. The buffer assembly also needs to effectively absorb some of the impact force to achieve a good cushioning effect. In some embodiments, the buffer assembly includes an energy-absorbing box 22, which contains the magnetic component 21. The energy-absorbing box 22 is box-shaped and can be made of steel, aluminum, or polymer. It has high strength, absorbs more energy during a collision, effectively protects the internal magnetic component 21, and provides good anti-collision performance for the entire lawnmower.

[0035] Please see Figure 3In some embodiments, the energy-absorbing box 22 is clearance-fitted with the housing, and the outline size of the receiving cavity 11 is larger than the outline size of the energy-absorbing box 22, so that the energy-absorbing box 22 can move in the receiving cavity 11, so that the energy-absorbing box 22 can move smoothly back and forth in the housing during the collision process.

[0036] Please see Figure 3 In some embodiments, the outline shape of the energy-absorbing box 22 is adapted to the outline shape of the receiving cavity 11 of the housing, which can reduce the entry of foreign objects between the energy-absorbing box 22 and the housing and reduce weed entanglement. Optionally, the receiving cavity 11 of the lawnmower housing can be rectangular, trapezoidal, polygonal, or other shapes in cross-section, and the corresponding energy-absorbing box 22 can be a hollow box with a rectangular, trapezoidal, polygonal, or other shapes in cross-section, adapted to the shape of the receiving cavity 11 of the lawnmower housing. This application does not specifically limit this aspect.

[0037] Please see Figure 3 In some embodiments, the top and bottom of the energy-absorbing box 22 are provided with first reinforcing ribs 224. The first reinforcing ribs 224 are in the same direction of movement as the energy-absorbing box 22, which can guide the energy-absorbing box 22 in the direction of movement of the receiving cavity 11, and at the same time strengthen the structural strength and absorb the impact force from the front.

[0038] Please see Figure 3 In some embodiments, the energy-absorbing box 22 is further provided with a second reinforcing rib 225, which is in the same direction of movement as the energy-absorbing box 22 and can increase the structural strength of the energy-absorbing box 22.

[0039] Please see Figure 2 In some embodiments, the housing includes a front shell 12 and a rear plate 13 connected to each other, with a receiving cavity 11 formed between the front shell 12 and the rear plate 13. The front shell 12 has a first cavity 122, and the rear plate 13 has a second cavity 132. The first cavity 122 and the second cavity 132 are joined to form the receiving cavity 11. The energy-absorbing box 22 includes a movable part 221 and an abutting part 222 connected to each other. The outline dimension of the first cavity 122 is larger than the outline dimension of the movable part 221 and smaller than the outline dimension of the abutting part 222. The outline dimension of the second cavity 132 is larger than the outline dimension of the abutting part 222. The outline dimension of the movable part 221 is smaller than the outline dimensions of the first cavity 122 and the second cavity 132, and the movable part 221 can move back and forth throughout the receiving cavity 11. The size of the abutment portion 222 is larger than the size of the first cavity 122 and smaller than the size of the second cavity 132. The abutment portion 222 can move back and forth within the second cavity 132. When the abutment portion 222 moves forward to the position of the first cavity 122, it will be stuck by the first cavity 122 and will not slip out of the first cavity 122. In other words, the first cavity 122 plays a role in abutting and limiting the abutment portion 222.

[0040] Please see Figure 3 In some embodiments, a third reinforcing rib 123 is also provided on the inner wall of the front shell 12 to limit the abutment portion 222 and prevent the abutment portion 222 from slipping out of the front shell 12.

[0041] Please see Figure 3 In some embodiments, the front shell 12 has a through hole 121 communicating with the receiving cavity 11, and the rear plate 13 has an opening 131 communicating with the receiving cavity 11. The sensing component 3 is disposed on the rear plate 13. The energy-absorbing box 22 passes through the through hole 121 and enters the receiving cavity 11. When the energy-absorbing box 22 moves toward the rear plate 13 under the action of an external force, the magnetic component 21 protrudes from the opening 131 and senses the sensing component 3. The sensing component 3 and the energy-absorbing box 22 are respectively disposed on both sides of the receiving cavity 11, which can effectively reduce the impact of collisions on the sensing component 3. When the energy-absorbing box 22 moves toward the rear plate 13 under the action of an external force, the magnetic component 21 protrudes from the opening 131, and the distance between it and the sensing component 3 shortens. The magnetic field strength near the sensing component 3 changes, and the change in the magnetic signal in the sensing component 3 causes a change in the electrical signal. The sensing component 3 controls the lawnmower to perform obstacle avoidance operation through the electrical signal.

[0042] Optionally, the sensing component 3 is a magnetic sensor, such as a Hall sensor, anisotropic magnetoresistive sensor, tunneling magnetoresistive sensor, etc. Preferably, in some embodiments, a Hall sensor 31 can be used. The Hall sensor 31 is highly integrated, and the circuit board 311 and the Hall element 312 can be packaged in a small structure, which is compact, lightweight, and easy to use. The output signal of the Hall sensor 31 is linearly related to the strength of the magnetic field, has a fast response time, and can accurately realize position and velocity sensing.

[0043] Please see Figure 4 In some embodiments, the Hall sensor 31 is located in a direction perpendicular to the opening 131. 。 Understandably, the Hall sensor 31 can be located on the upper, lower, left, and right sides of the opening, and is positioned axially on the opening 131. The Hall sensor 31 responds independently to the magnetic element 21 exposed in the opening 131. The Hall sensor 31 operates based on the Hall effect, and contains a thin metal or semiconductor sheet carrying an electric current. When the Hall sensor 31 is placed perpendicularly on the magnetic element 21, a Hall potential difference is generated across the metal or sheet. When the energy-absorbing box 22 is impacted by an external force and moves towards the rear plate 13, the magnetic element 21 is exposed in the opening 131 and positioned perpendicularly to the Hall sensor 31. The Hall sensor 31 generates a potential difference and outputs an electrical signal to control the lawnmower to avoid obstacles.

[0044] In some embodiments, the lawnmower also includes a walking mechanism, a cutting mechanism, and a control mechanism electrically coupled to the sensing component 3. When the sensing component 3 detects the movement of the magnetic component 21, it generates an electrical signal and transmits the electrical signal to the control mechanism. After receiving the electrical signal, the control mechanism controls the walking mechanism to turn or controls the cutting mechanism to stop running.

[0045] Please see Figure 4 In this embodiment, two magnetic elements 21 and two Hall sensors 31 are respectively arranged on the left and right sides of the rear plate 13, with each magnetic element 21 corresponding to a Hall sensor 31. When the left side of the energy-absorbing box 22 is impacted, the magnetic element 21 on the left moves and exposes the opening 131, causing the Hall sensor 31 on the left side of the rear plate 13 to generate an electrical signal, controlling the lawnmower's walking mechanism to turn right to avoid obstacles on the left, or controlling the cutting mechanism to stop running. Similarly, when the right side of the energy-absorbing box 22 is impacted, the magnetic element 21 on the right moves and exposes the opening 131, causing the Hall sensor 31 on the right side of the rear plate 13 to generate an electrical signal, controlling the lawnmower's walking mechanism to turn left to avoid obstacles on the right, or controlling the cutting mechanism to stop running. Thus, the lawnmower of this application can avoid obstacles in front and on both sides.

[0046] Please see Figure 2 In some embodiments, the buffer assembly further includes an elastic element 23 located in the receiving cavity 11. One end of the elastic element 23 is connected to the energy-absorbing box 22, and the other end is connected to the housing. When the energy-absorbing box 22 is subjected to a collision force, it moves rearward, simultaneously compressing the elastic element 23. After compression and deformation, the elastic element 23 possesses elastic potential energy. The elastic element 23 recovers its deformation, pushing the energy-absorbing box 22 forward to reset, ready for the next collision. The elastic element 23 exhibits high flexibility and is sensitive to force. Optionally, the elastic element 23 can be a torsion spring, a return spring, a tension spring, a metal elastic sheet, etc.

[0047] Please see Figure 3 In some embodiments, the energy-absorbing box 22 is provided with a first guide post 223. See also... Figure 2The housing is provided with a second guide post 14, and a first guide post 223 is provided with a hollow portion 2231. The radial dimension of the hollow portion 2231 is larger than the radial dimension of the second guide post 14. The first guide post 223 is movably sleeved on the second guide post 14, and an elastic element 23 is simultaneously sleeved on the outer periphery of both the first guide post 223 and the second guide post 14. The first guide post 223 and the second guide post 14 can guide the compression or elongation direction of the elastic element 23. When the energy-absorbing box 22 is impacted by an external force and moves backward toward the housing, the first guide post 223 moves toward the rear of the second guide post 14, increasing the portion of the second guide post 14 sleeved by the first guide post 223, and the elastic element 23 is compressed and deformed, shortening. When the elastic element 23 recovers its deformation and elongates, it pushes the first guide post 223 forward away from the second guide post 14, shortening the portion of the second guide post 14 sleeved by the first guide post 223, and the energy-absorbing box 22 moves forward away from the housing under the force of the elastic element 23.

[0048] Please see Figure 2 In some embodiments, the buffer assembly further includes a crash beam 24, which is connected to the energy-absorbing box 22 and surrounds the outer periphery of the housing, further enhancing the buffering effect and strengthening the protection of the housing. The crash beam 24 includes a crossbeam 242 and a side beam 243 disposed in front of the energy-absorbing box 22. The side beam 243 includes a first side beam and a second side beam. The first side beam is angularly connected to the crossbeam 242, and the side beam 243 forms an obtuse angle of 90° to 150° with the crossbeam 242. The second side beam extends towards one side of the energy-absorbing box. It is understood that the arrangement of the first and second side beams expands the contact area of ​​the crash beam.

[0049] Please see Figure 2In some embodiments, the buffer assembly further includes a support plate 25, and the anti-collision beam 24 further includes a support beam 241. The support beam 241 is connected to the crossbeam 242. One end of the support plate 25 is connected to the bottom of the support beam 241, and the other end is connected to the energy-absorbing box 22. The outline dimensions of the portion of the support plate 25 connected to the support beam 241 and the outline dimensions of the support beam 241 are smaller than the outline dimensions of the receiving cavity 11, so that the support beam 241 moves within the receiving cavity 11 as the energy-absorbing box 22 moves. Thus, the support beam 241, as a structure surrounding the outermost periphery of the lawnmower, can be the first to be impacted and move towards the rear plate 13. Through the compression of the elastic element 23, it drives the energy-absorbing box 22 to move towards the rear plate 13. The side beam 243 of the anti-collision beam 24 expands the collision range of the trigger sensing assembly, so that the anti-collision beam 24, when impacted from any direction, can cause the energy-absorbing box 22 to move towards the rear plate through the movable fulcrum of the elastic element 23, thereby triggering the sensing assembly 3. 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.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lawnmower, characterized in that, The lawnmower includes: The housing has a receiving cavity; A buffer assembly, movably disposed within the receiving cavity and partially surrounding the outer periphery of the housing, the buffer assembly being provided with a magnetic element, the buffer assembly being configured to move under the action of an external force to drive the magnetic element to move relative to the housing; and A sensing component is disposed in the housing, and the sensing component is used to detect the movement of the magnetic component; The buffer assembly includes an energy-absorbing box and an elastic element. The energy-absorbing box is clearance-fitted with the housing. The outline dimension of the receiving cavity is larger than the outline dimension of the energy-absorbing box, so that the energy-absorbing box can move in the receiving cavity. The energy-absorbing box is provided with the magnetic element. The elastic element is located in the receiving cavity. One end of the elastic element is connected to the energy-absorbing box, and the other end is connected to the housing. The housing includes a front shell and a rear plate connected to each other. The receiving cavity is formed between the front shell and the rear plate. The front shell has a through hole communicating with the receiving cavity. The rear plate has an opening communicating with the receiving cavity. The sensing component is disposed on the rear plate. The energy-absorbing box enters the receiving cavity through the through hole. When the energy-absorbing box moves toward the rear plate under the action of an external force, the magnetic component is exposed through the opening and generates a sense with the sensing component. The buffer assembly also includes a crash beam, which is connected to the energy-absorbing box and surrounds the outer periphery of the housing; The anti-collision beam includes a crossbeam and a side beam. The side beam includes a first side beam and a second side beam connected to each other. The first side beam is connected to the crossbeam at a preset angle, which is an obtuse angle. The second side beam extends toward one side of the energy-absorbing box. The buffer assembly also includes a tray, and the anti-collision beam includes a support beam connected to a crossbeam. One end of the tray is connected to the bottom of the support beam, and the other end is connected to the energy-absorbing box. The outline dimensions of the portion of the tray connected to the support beam and the outline dimensions of the support beam are smaller than the outline dimensions of the receiving cavity. When the anti-collision beam is impacted, the support beam drives the energy-absorbing box to move within the receiving cavity.

2. The lawnmower according to claim 1, characterized in that, The front shell has a first cavity, and the rear plate has a second cavity. The first cavity and the second cavity are connected to form the receiving cavity. The through hole is connected to the first cavity, and the opening is connected to the second cavity. The energy-absorbing box includes a movable part and an abutting part connected to each other. The outline dimension of the first cavity is larger than the outline dimension of the movable part and smaller than the outline dimension of the abutting part. The outline dimension of the second cavity is larger than the outline dimension of the abutting part.

3. The lawnmower according to claim 1, characterized in that, The sensing component is a Hall sensor, which is located in a direction perpendicular to the opening, and the Hall sensor responds individually to the magnetic element that exposes the opening.

4. The lawnmower according to claim 1, characterized in that, The energy-absorbing box is provided with a first guide post, and the shell is provided with a second guide post. The first guide post is provided with a hollow part, and the radial dimension of the hollow part is larger than the radial dimension of the second guide post. The first guide post is movably sleeved on the second guide post, and the elastic element is simultaneously inserted through the outer periphery of the first guide post and the second guide post.

5. The lawnmower according to any one of claims 1 to 4, characterized in that, The lawnmower also includes a walking mechanism, a cutting mechanism, and a control mechanism electrically coupled to the sensing component. When the sensing component detects the movement of the magnetic component, it transmits an electrical signal to the control mechanism, which then controls the walking mechanism to turn or controls the cutting mechanism to stop operating.

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