Automatic mower

Abstract

The utility model discloses an automatic mowing machine which comprises a machine body, a moving assembly, a cutting driving part and a cutting mechanism, the moving assembly comprises a first driving wheel and a second driving wheel which are oppositely installed on the two sides of the bottom of the machine body and drive the automatic mowing machine to move, and the outer side of the first driving wheel and / or the outer side of the second driving wheel are basically flush with the side edge of the machine body; the cutting driving part is mounted on the machine body; the cutting mechanism is installed below the machine body and driven by a cutting driving piece to execute mowing work. The maximum span of the cutting track of the cutting mechanism in the transverse direction is larger than the distance from the inner side of the first driving wheel to the inner side of the second driving wheel, and the distance between the cutting assembly and the edge of the side face of the machine body can be shortened by arranging the moving assembly to be basically flush with the machine body. The width of the cutting track of the cutting assembly is set to be larger than the distance between the opposite sides of the moving assembly, the distance between the cutting assembly and the edge of the side face of the machine body can be further shortened, and it can be guaranteed that grass leakage is avoided when the automatic mower conducts cutting in the two directions.

Description

Technical Field

[0001] The utility model relates to the technical field of garden machinery, in particular to an automatic lawn mower. Background Art

[0002] Nowadays, power tools such as automatic lawn mowers, leaf blowers, snow blowers, blowers and suction machines, and chain saws are widely used in industries, construction, gardens, housework and around houses, bringing great convenience to people's work and life. With the increasing emphasis on greening in modern life and the growing number of lawns, automatic lawn mowers are one of the essential tools for mowing and maintaining lawns.

[0003] Currently, in automatic lawn mowers with edge cutting, the cutting mechanism is generally disposed in a biased manner. However, such automatic lawn mowers can only perform edge cutting along a preset direction and cannot perform edge cutting along the opposite direction of the preset direction. For example, if the preset direction of the automatic lawn mower is counterclockwise, when clockwise edge cutting is required in some special cases, a large grass leakage area will be generated at the boundary. Therefore, the traveling direction of the current automatic lawn mower is relatively single while ensuring no grass leakage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic lawn mower capable of realizing double-sided edge cutting.

[0005] The utility model provides an automatic lawn mower, comprising:

[0006] A fuselage, with the direction perpendicular to the ground being the vertical direction of the fuselage, and the direction perpendicular to both the advancing direction of the automatic lawn mower and the vertical direction being the transverse direction of the fuselage;

[0007] A moving component, including a first driving wheel and a second driving wheel oppositely installed on both sides of the bottom of the fuselage, driving the automatic lawn mower to move, and the outer sides of the first driving wheel and / or the second driving wheel being substantially flush with the side of the fuselage;

[0008] A cutting driving member, installed on the fuselage;

[0009] A cutting mechanism, installed below the fuselage and driven by the cutting driving member to perform lawn mowing work; the maximum span of the cutting trajectory of the cutting mechanism in the transverse direction is greater than the distance from the inner side of the first driving wheel to the inner side of the second driving wheel.

[0010] As an embodiment of this specification, with the advancing direction of the automatic lawn mower being the front, the rotation center of the cutting mechanism is located in front of the first driving wheel and the second driving wheel, and the cutting mechanism includes an even number of cutting discs, and the rotation center of at least one cutting disc is not located on the central axis of the transverse direction of the fuselage.

[0011] As an embodiment of this specification, the distance from the outer side of the first driving wheel to the outer side of the second driving wheel is less than the maximum lateral distance of the fuselage.

[0012] As an embodiment of this specification, the cutting mechanism includes an odd number of cutting discs, and the rotation center of at least one cutting disc is located on the lateral central axis of the fuselage.

[0013] As an embodiment of this specification, the cutting mechanism includes a plurality of cutting discs, and the center of the largest circumscribed circle formed by the plurality of cutting discs is located on the lateral central axis of the fuselage.

[0014] As an embodiment of this specification, the minimum distance between the side wall of the fuselage and the cutting trajectory formed by the cutting mechanism is 24.5 mm.

[0015] As an embodiment of this specification, a protection mechanism is further included;

[0016] The protection mechanism includes two bottom protections connected to the bottom of the fuselage. The two bottom protections are respectively arranged on the left and right sides of the cutting mechanism, and at least part of the bottom protection is located below the cutting mechanism.

[0017] As an embodiment of this specification, the fuselage includes a frame and a mounting seat. The protection mechanism further includes an outer cover and an inner cover. The outer cover is fixedly connected to the frame and covers the outside of the inner cover and the mounting seat. The inner cover is fixedly connected to the mounting seat. The inner cover covers the outside of the cutting mechanism. The bottom protection is connected to the inner cover; the bottom protection is connected to the side wall of the inner cover.

[0018] As an embodiment of this specification, the automatic lawn mower further includes a moving driving member, and the moving driving member is used to drive the mounting seat and the inner cover to move vertically relative to the frame.

[0019] As an embodiment of this specification, the fuselage includes a frame and a mounting seat fixedly connected to the frame. The protection mechanism further includes a cover. The cover covers the outside of the cutting mechanism and the mounting seat. The bottom protection is connected to the cover. The cover is fixedly connected to the frame; the bottom protection is connected to the side wall of the cover.

[0020] In the automatic lawn mower according to the embodiment of the present invention, by setting the moving component to be substantially flush with the fuselage, the distance between the cutting component and the side edge of the fuselage can be shortened, and by setting the width of the cutting trajectory of the cutting component to be larger than the size of the distance on the opposite side of the moving component, the distance between the cutting component and the side edge of the fuselage can be further reduced, so that no grass leakage can be ensured when the automatic lawn mower cuts in two directions. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0022] Figure 1 Is a bottom view of the automatic lawn mower according to the first embodiment of the present invention.

[0023] Figure 2 Is Figure 1 A schematic diagram of a state of some components of the shown automatic lawn mower.

[0024] Figure 3 Is Figure 1 A schematic diagram of another state of some components of the shown automatic lawn mower.

[0025] Figure 4 Is Figure 1 A three-dimensional structural schematic diagram of the bottom protection of the shown automatic lawn mower.

[0026] Figure 5 Is Figure 1 A bottom view structural schematic diagram of the bottom protection and cutting mechanism of the shown automatic lawn mower.

[0027] Figure 6 Is Figure 1 A side view structural schematic diagram of the bottom protection and cutting mechanism of the shown automatic lawn mower.

[0028] Figure 7 Is a schematic diagram of the structure of some components of the automatic lawn mower according to the second embodiment of the present invention.

[0029] Reference numerals:

[0030] Body 11, Frame 112

[0031] Mounting seat 114, Moving assembly 13

[0032] First driving wheel 132, Second driving wheel 133

[0033] Cutting mechanism 15, Cutting disc 152

[0034] Blade 154, Protection mechanism 17

[0035] Bottom protection 172, Side plate 1722

[0036] Main body part 1723, Combing grass part 1724

[0037] Guide part 1726 and grass inlet 1727

[0038] Upright part 1728 and outer shield 174

[0039] Inner shield 176 and shield 178 Specific embodiments

[0040] Specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0041] In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0042] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. Taking the forward direction of the automatic lawn mower as the front, the rotation center of the cutting mechanism 15 is located in front of the first driving wheel 132 and the second driving wheel 133, and the cutting mechanism 15 includes an even number of cutting discs, and the rotation center of at least one of the cutting discs is not located on the transverse central axis of the fuselage 11.

[0043] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0044] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0045] First embodiment

[0046] Please refer to Figure 1, the automatic lawn mower provided in the first embodiment of the present utility model includes a body 11, a moving assembly 13, a cutting driving member, and a cutting mechanism 15. The moving assembly 13 includes a first driving wheel 132 and a second driving wheel 133 installed on both sides of the bottom of the body 11. The moving assembly 13 is used to drive the automatic lawn mower to move. The outer sides of the first driving wheel 132 and / or the second driving wheel 133 are substantially flush with the side of the body 11. The cutting driving member is installed on the body 11. The cutting mechanism 15 is installed below the body 11 and is driven by the cutting driving member to rotate to perform lawn mowing work. The maximum span of the cutting trajectory of the cutting mechanism 15 in the horizontal direction is greater than the distance from the inner side of the first driving wheel 132 to the inner side of the second driving wheel 133 (that is, the diameter of the maximum circumscribed circle S1 corresponding to the cutting trajectory of the cutting mechanism 15 is greater than the distance between the inner sides of the first driving wheel 132 and the second driving wheel 133). Among them, in this article, the direction perpendicular to the ground is the vertical direction of the body 11, and the direction perpendicular to both the forward direction and the vertical direction of the automatic lawn mower is the horizontal direction of the body 11 (the horizontal direction is also the left-right direction of the automatic lawn mower). It can be understood that the outer sides of the first driving wheel 132 and / or the second driving wheel 133 being substantially flush with the side of the body 11 means that the outer sides of the first driving wheel 132 and / or the second driving wheel 133 and the side wall of the body 11 are substantially on the same straight line, but a little error is allowed, that is, it includes both the case where the outer sides of the first driving wheel 132 and / or the second driving wheel 133 are completely flush with the side wall of the body 11, and the case where the outer sides of the first driving wheel 132 and / or the second driving wheel 133 are slightly recessed into the interior of the body 11, and also includes the case where the outer sides of the first driving wheel 132 and / or the second driving wheel 133 are slightly convex to the outside of the body 11.

[0047] In the automatic lawn mower of this embodiment, by setting the moving assembly to be substantially flush with the body, the distance between the cutting assembly and the side edge of the body can be shortened, and by setting the width of the cutting trajectory of the cutting assembly to be greater than the distance between the opposite sides of the moving assembly, the distance between the cutting assembly and the side edge of the body can be further reduced, so that the automatic lawn mower can ensure no grass leakage when cutting in both directions. In this way, there is no need to specify the edge direction during mowing, and for narrow channels, it can also be mowed only once.

[0048] In this embodiment, the automatic lawn mower includes a first outbound direction and a second outbound direction opposite to the first outbound direction, and the automatic lawn mower includes a first inbound direction and a second inbound direction opposite to the first inbound direction. That is to say, the direction of the automatic lawn mower's first outbound can be different from the direction of its nth outbound, and the direction of the automatic lawn mower's first return can be different from the direction of its nth return, where n is a positive integer greater than 1. Therefore, the automatic lawn mower of this embodiment can go out in the clockwise or counterclockwise direction and can also return to the station in the clockwise or counterclockwise direction. Therefore, the charging station can be set in either direction, and there is no need to specify the installation direction of the charging pile for the user, which is convenient for the installation of the charging station.

[0049] In this embodiment, please refer to Figure 2 , the fuselage 11 includes a frame 112 and a mounting base 114. Specifically, in this embodiment, the mounting base 114 is movably connected to the frame 112 in the vertical direction, and the cutting drive member can be disposed within the mounting base 114. The automatic lawn mower further includes a moving drive member for driving the mounting base 114 to move relative to the frame 112 in the vertical direction.

[0050] In this embodiment, the first driving wheel 132 and the second driving wheel 133 are generally the rear wheels. Specifically, the moving assembly 13 may further include auxiliary wheels located at the front end of the fuselage 11 of the automatic lawn mower, and the number of auxiliary wheels may be one, two or more depending on the situation.

[0051] Specifically, the first driving wheel 132 and the second driving wheel 133 can be driven by a motor to move, so as to obtain an automatic lawn mowing robot that can move automatically.

[0052] In this embodiment, taking the forward direction of the automatic lawn mower as the front, the rotation center of the cutting mechanism 15 is located on the front side of the first driving wheel 132 and the second driving wheel 133. By making the rotation center of the cutting mechanism 15 located on the front side of the first driving wheel 132 and the second driving wheel 133, the cutting range of the cutting mechanism 15 can be extended as much as possible to the outermost position closest to the automatic lawn mower, and the effect of cutting to the edge can be made better as much as possible. In addition, the automatic lawn mower may include a plurality of cutting discs, and the rotation centers of the plurality of cutting discs may not intersect the horizontal central axis.

[0053] In this embodiment, the distance from the outer side of the first driving wheel 132 to the outer side of the second driving wheel 133 is less than the maximum lateral distance of the fuselage 11. In this way, it is possible to prevent the first driving wheel 132 and the second driving wheel 133 from protruding outside the fuselage 11 and occupying the dimensions in the width direction, thereby ensuring the effect of cutting to the edge.

[0054] Specifically in Figure 1In the illustrated embodiment, the rotation center of the cutting mechanism 15 is located on the transverse central axis of the automatic lawn mower. Specifically, the cutting mechanism 15 may include a single cutting blade disc or multiple cutting blade discs. In one embodiment, the cutting mechanism 15 includes a single cutting blade disc, and the center of the single cutting blade disc is located on the transverse central axis of the automatic lawn mower. In another embodiment, the cutting mechanism 15 includes an odd number of cutting blade discs, and the multiple cutting blade discs are arranged non-coaxially. The rotation center of at least one cutting blade disc is located on the transverse central axis of the fuselage 11. In yet another embodiment, the cutting mechanism 15 includes multiple coaxially arranged cutting blade discs, and the center of the largest circumscribed circle S1 formed by the multiple cutting blade discs is located on the transverse central axis of the automatic lawn mower. When the cutting mechanism 15 includes multiple coaxially arranged cutting blade discs, from bottom to top, the diameter of the cutting circle corresponding to the cutting range formed by the cutting blade discs gradually increases, so that the cutting blade disc at the top cuts the grass first. It can be understood that in yet another embodiment, the rotation center of the cutting mechanism 15 may not be located on the transverse central axis of the fuselage 11.

[0055] Specifically, the minimum distance L1 between the side wall of the fuselage 11 and the cutting trajectory of the cutting mechanism 15 is 24.5 mm. That is to say, the minimum value of the distance L1 between the largest circumscribed circle S1 and the side wall of the fuselage 11 can reach 24.5 mm to ensure that the blade disc of the cutting mechanism 15 can cut to the edge. More specifically, the minimum distance between the side walls on both the left and right sides of the fuselage 11 and the cutting trajectory of the cutting mechanism 15 is 24.5 mm, so as to ensure that both sides of the cutting mechanism 15 can cut to the edge.

[0056] Specifically, the cutting mechanism 15 includes a cutting blade disc 152 and blades 154, and multiple blades 154 are spaced apart at the periphery of the cutting blade disc 152. The area formed by the rotation of the blades 154 is the cutting trajectory of the cutting mechanism 15.

[0057] In this embodiment, the automatic lawn mower further includes a protection mechanism 17. The protection mechanism 17 includes two bottom protections 172 connected to the fuselage 11. The two bottom protections 172 are respectively arranged on the left and right sides of the cutting mechanism 15, and at least part of the bottom protection 17 is located below the cutting mechanism 15. By providing the bottom protection, safe mowing can be ensured.

[0058] In this embodiment, the protection mechanism 17 further includes an outer shield 174 and an inner shield 176. The outer shield 174 is fixedly connected to the frame 112 and covers the outer sides of the inner shield 176 and the mounting base 114. The inner shield 176 is fixedly connected to the mounting base 114. The inner shield 176 covers the outer side of the cutting mechanism 15. The bottom protection 172 is connected to the inner shield 176. Specifically, the side of the bottom protection 172 is connected to the side wall of the inner shield 176. As the mounting base 114 moves vertically relative to the frame 112, the inner shield 176 and the cutting mechanism 15 can move vertically relative to the frame 112 therewith. Please refer to Figure 2 , which is a state diagram of the inner shield 176 and the cutting mechanism 15 in a higher position; please refer to Figure 3 , which is a state diagram of the inner shield 176 and the cutting mechanism 15 in a lower position. By enabling the inner shield 176 and the cutting mechanism 15 to be lifted and lowered, the cutting mechanism 15 can cut grass at different heights, especially lower grass, and can cut to the edge when cutting grass at different heights. At the same time, since the inner shield 176 and the bottom protection 172 always cover the cutting mechanism 15, the cutting mechanism 15 can be protected regardless of its position to ensure safety.

[0059] Specifically, the distance L2 between the side wall of the inner shield 176 and the largest circumscribed circle S1 corresponding to the cutting range of the cutting mechanism 15 can be about 5 mm. On the plane flush with the cutting mechanism 15, the distance L3 between the side wall of the inner shield 176 and the side wall of the outer shield 174 is about 8 mm. The distance L4 between the bottom of the cutting mechanism 15 and the top of the bottom protection 172 can be about 12 mm. The distance L5 between the bottom of the outer shield 174 and the ground can be about 50 mm. When in the state shown in Figure 2 , the distance L6 between the bottom of the cutting mechanism 15 and the ground can be about 70 mm; when in the state shown in Figure 3 , the distance L7 between the bottom of the cutting mechanism 15 and the ground can be about 30 mm.

[0060] In this embodiment, there is an overlap in the cutting strips during the path planning of the automatic lawn mower, and the width of the overlapping part is greater than or equal to the lateral width of the bottom protection 172. When the automatic lawn mower mows the grass, it will cut a track on the lawn at a certain position, and this track is a cutting strip. When the automatic lawn mower mows the grass in the next trip, part of it will press on the cutting strip formed by the previous mowing, resulting in an overlap of the cutting strips. In this way, even if the bottom protection 172 presses the grass to a certain extent and causes missed cutting, the problem of alternating high and low grass caused by missed cutting can be solved through the overlap of the cutting strips.

[0061] In this embodiment, please refer to Figures 4 to 6, the bottom guard 172 includes a side plate 1722 and a main body portion 1723, and the side plate 1722 is connected to one side of the main body portion 1723. The bottom guard 172 can be fixedly connected to the inner shield 176 through the side plate 1722.

[0062] Specifically, the main body portion 1723 of the bottom guard 172 includes a grass combing portion 1724. A guiding portion 1726 is provided at the front end of the grass combing portion 1724, and the bottom surface of the guiding portion 1726 is inclined upward along the advancing direction. Specifically, the inclination angle P of the bottom surface of the guiding portion 1726 relative to the bottom surface of the main body portion 1723 can be 35° to 50°. The distance L8 between the foremost end of the guiding portion 1726 and the bottom of the main body portion 1723 is greater than or equal to 27.5 mm. By providing the upwardly inclined guiding portion 1726, it is beneficial for the automatic lawn mower to cross obstacles, and the automatic lawn mower is not easily stuck by ground obstacles; when L8 reaches 27.5 mm, the guiding portion 2726 can guide the automatic lawn mower to pass through a wooden strip with a height of 40 mm.

[0063] Specifically, the width W1 at the front end of the grass inlet 1727 of the bottom guard 172 is greater than or equal to 15 mm, and the inlet grass 1727 is a gap formed between adjacent grass combing portions 1724. By setting the width of the grass inlet 1727 as large as possible, as much grass as possible can enter the grass inlet 1727, avoiding the bottom guard 172 pressing the grass and causing missed cutting problems.

[0064] Specifically, the size of the front end of the guiding portion 1726 is smaller than the size of the rear end of the guiding portion 1726. In this way, during the forward movement of the automatic lawn mower, more grass can enter the cutting area along the grass inlet 1727, improving the cutting efficiency.

[0065] Specifically, the guiding portion 1726 includes an upright portion 1728, and the upright portion 1728 extends upward from the bottom surface of the guiding portion 1726. The setting of the upright portion 1728 can ensure the strength of the guiding portion 1726 when the width is small enough, and can help the grass inclined to both sides of the grass combing portion 1724 to stand up for smooth cutting.

[0066] Specifically, at least a part of the projection of the grass inlet 1727 of the bottom guard 172 on the cutting circle of the cutting mechanism 15 overlaps with the cutting circle of the cutting mechanism 15.

[0067] Second Embodiment

[0068] The structure of the automatic lawn mower according to the second embodiment of the present invention is basically the same as that of the automatic lawn mower according to the first embodiment. Please refer to Figure 7, the main differences lie in the connection relationship between the frame 112 and the mounting base 114 and the structure of the protection mechanism 17. The specific differences include that in the second embodiment, the fuselage 11 includes a frame 112 and a mounting base 114 fixedly connected to the frame 112. The protection mechanism 17 includes a protective cover 178. The protective cover 178 covers the outside of the cutting mechanism 15 and the mounting base 114. The bottom protection 172 is connected to the protective cover 178. The protective cover 178 is fixedly connected to the frame 112. The cutting drive member is arranged in the mounting base 114. Specifically, the bottom protection 172 is connected to the side wall of the protective cover 178.

[0069] In addition, in this embodiment, the bottom protection 172 does not include the side plate 1722. The bottom protection 172 is fixedly connected to the protective cover 178 through the main body portion 1723.

[0070] The other structures of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0071] For the automatic lawn mower of this embodiment, since only the protective cover 178 is provided, the edge of the cutting mechanism 15 can be closer to the outer side wall of the fuselage 11, making the effect of the automatic lawn mower cutting to the edge better.

[0072] It should be noted that each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0073] As mentioned above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An automatic lawn mower, characterized in that: include: A body (11), wherein the direction perpendicular to the ground is defined as the vertical direction of the body (11), and the direction perpendicular to both the forward direction of the automatic lawn mower and the vertical direction is defined as the lateral direction of the body (11); A moving assembly (13) comprising a first driving wheel (132) and a second driving wheel (133) mounted on two sides of the bottom of the body (11) to drive the automatic lawn mower to move, wherein the outer sides of the first driving wheel (132) and / or the second driving wheel (133) are substantially flush with the side of the body (11); A cutting drive component installed on the machine body (11); A cutting mechanism (15) is installed below the machine body (11) and is driven by the cutting drive member to perform a grass cutting operation; the maximum span of the cutting track of the cutting mechanism (15) in the transverse direction is greater than the distance from the inner side of the first driving wheel (132) to the inner side of the second driving wheel (133).

2. The automatic lawn mower according to claim 1, characterized in that: With the forward direction of the automatic lawn mower as the front, the rotation center of the cutting mechanism (15) is located in front of the first driving wheel (132) and the second driving wheel (133), and the cutting mechanism (15) includes an even number of cutting discs, and the rotation center of at least one of the cutting discs is not located on the transverse center axis of the machine body (11).

3. The automatic lawn mower according to claim 1, characterized in that: The distance from the outer side of the first driving wheel (132) to the outer side of the second driving wheel (133) is smaller than the maximum spacing of the fuselage (11) in the lateral direction.

4. The automatic lawn mower according to claim 1, characterized in that: The cutting mechanism (15) comprises an odd number of cutting blades, and the rotation center of at least one of the cutting blades is located on the transverse central axis of the fuselage (11).

5. The automatic lawn mower according to claim 1, characterized in that: The cutting mechanism (15) comprises a plurality of cutting blades, and the center of the largest circumscribed circle formed by the plurality of cutting blades is located on the transverse central axis of the fuselage (11).

6. The automatic lawn mower according to claim 1, characterized in that: The minimum distance between the side wall of the body (11) and the cutting track formed by the cutting mechanism (15) is 24.5 mm.

7. The automatic lawn mower according to claim 1, characterized in that: Also includes a protection mechanism (17); The protection mechanism (17) comprises two bottom protections (172) connected to the fuselage (11); the two bottom protections (172) are respectively arranged on the left and right sides of the cutting mechanism (15), and at least part of the bottom protection (172) is located below the cutting mechanism (15).

8. The automatic lawn mower according to claim 7, characterized in that: The fuselage (11) includes a frame (112) and a mounting seat (114); the protection mechanism (17) also includes an outer shield (174) and an inner shield (176); the outer shield (174) is fixedly connected to the frame (112) and is disposed on the inner shield (176) and the outer side of the mounting seat (114); the inner shield (176) is fixedly connected to the mounting seat (114); the inner shield (176) is disposed on the outer side of the cutting mechanism (15); the bottom protection (172) is connected to the inner shield (176); and the bottom protection (172) is connected to the side wall of the inner shield (176).

9. The automatic lawn mower according to claim 8, characterized in that: The automatic lawn mower further comprises a moving drive member, which is used to drive the mounting seat (114) and the inner shield (176) to move vertically relative to the frame (112).

10. The automatic lawn mower according to claim 7, characterized in that: The body (11) includes a frame (112) and a mounting seat (114) fixedly connected to the frame (112); the protection mechanism (17) also includes a shield (178); the shield (178) is arranged on the outside of the cutting mechanism (15) and the mounting seat (114); the bottom protection (172) is connected to the shield (178); the shield (178) is fixedly connected to the frame (112); the bottom protection (172) is connected to the side wall of the shield (178).

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