Automatic mower

Abstract

The present application relates to a kind of automatic mower, in the process of mowing, using motor drives cutting element to rotate, the grass to be cut is cut off.Because after cutting, the grass cuttings generated will accumulate in the shroud, for this, on the first side and / or second side, for the shroud inside grass cuttings outlet opening is provided, i.e. at least one of the two sides of the shroud is in open state, so that the grass cuttings accumulated in the shroud is timely discharged from the opening of at least one side under the rotation of cutting element, avoid the shroud to accumulate a large amount of grass cuttings in a short time and lose cutting width, effectively reduce the amount of accumulated grass in the shroud, improve cutting quality, help to improve cutting efficiency.At the same time, the corresponding position of opening is provided with protective fence, to provide shelter for opening, avoid cutting element to be directly exposed outside at opening, so as to meet the needs of safety protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic mowers, in particular to an automatic mower. BACKGROUND

[0002] As an important mechanical cutting tool for trimming lawns and vegetation, mowers are widely used in the fields of agriculture, gardening, etc. According to different operation modes, mowers can be divided into handheld automatic mowers, self-moving automatic mowers, and hand-push automatic mowers, etc. In particular, automatic mowers, during the mowing process, due to the lack of supervision, the blades on the cutterhead are partially exposed to the outside for cutting, which poses a safety hazard. Therefore, the existing automatic mowers usually set a protective device near the cutterhead to prevent the user from being easily injured during operation. However, since the design of the existing protective device only focuses on safety considerations, it is easy to overlook other problems that the protective device itself may cause, such as affecting cutting efficiency. SUMMARY

[0003] Therefore, it is necessary to provide an automatic mower that can improve cutting efficiency while ensuring cutting safety.

[0004] An automatic mower comprises a machine body, a cutting device comprising a cutting element arranged at the bottom of the machine body, the cutting element being driven to rotate around its own axis, and a protective device comprising a shield arranged on the machine body, the shield being arranged on the cutting element. The shield has a first side and a second side arranged oppositely, and a direction from the first side to the second side is used to intersect with the advancing direction of the automatic mower. An opening is arranged on the first side and / or the second side for discharging grass clippings in the shield. The protective device further comprises at least one protective fence arranged on the machine body and opposite to the opening for providing shielding for the opening.

[0005] In the above automatic mower, during the mowing process, the cutting element is driven to rotate by a motor to cut the grass to be cut. After cutting, the generated grass clippings will accumulate in the shield. Therefore, an opening is arranged on the first side and / or the second side for discharging the grass clippings in the shield, i.e., at least one of the two side edges of the shield is in an open state, so that the accumulated grass clippings in the shield are discharged in time from the opening on at least one side under the rotation of the cutting element, avoiding the loss of cutting width due to the accumulation of a large amount of grass clippings in the shield within a short period of time, effectively reducing the amount of accumulated grass in the shield, improving the cutting quality, and being conducive to improving the cutting efficiency. At the same time, a protective fence is arranged at the corresponding position of the opening to provide shielding for the opening, avoiding the direct exposure of the cutting element at the opening, thereby meeting the requirements of safety protection.

[0006] In some embodiments, the first side and the second side are both provided with the opening, and the guard rail comprises at least two guard rails, and the first side and the second side are respectively opposite to the at least two guard rails.

[0007] In some embodiments, the length of the opening is at least 1 / 2 of the length of the guard rail.

[0008] In some embodiments, the guard rail is provided with a plurality of tooth-shaped components arranged at intervals; the tooth-shaped components are provided with an end portion close to the ground, and the height H of the end portion from the ground is greater than or equal to 20 mm and less than or equal to 50 mm.

[0009] In some embodiments, the tooth-shaped components are provided in a direction towards the ground on the guard rail.

[0010] In some embodiments, in any two adjacent tooth-shaped components, the spacing D between the end portions of the tooth-shaped components close to the ground is less than or equal to 50 mm.

[0011] In some embodiments, the thickness T of the tooth-shaped components in the direction from the first side to the second side is greater than or equal to 3 mm.

[0012] In some embodiments, the tooth-shaped components are provided with an inclined surface on one side in the direction of the travel direction of the automatic mower; the inclined surface is provided at an obtuse angle with the horizontal plane on which the machine body is located.

[0013] In some embodiments, the guard further has a rear skirt connected between the first side and the second side; in the travel direction, the rear skirt is located at the rear side of the cutting element, and the rear skirt is at least partially provided with a circular arc segment; the circular arc segment is at least partially the same as the curvature of the cutting element.

[0014] In some embodiments, the guard further has a front edge located between the first side and the second side; in the travel direction, the front edge is located at the front side of the cutting element, the front edge is opposite to the rear skirt, and the front edge is provided with an opening for the grass to be cut to enter the guard.

[0015] In some embodiments, the automatic mower further comprises a floating cover movably arranged on the machine body and extending along the periphery of the guard from a position opposite to the first side to a position opposite to the second side; the guard rail is arranged on the floating cover and at least partially protrudes from the floating cover.

[0016] In some embodiments, there is a gap between the floating cover and the drive wheel of the automatic mower, and the gap projects along a direction from the first side to the second side to form an area at least partially on the shield.

[0017] In some embodiments, the guard rail is integrated with or detachably connected to the floating cover.

[0018] In some embodiments, the cutting element includes at least two groups, and the shaft center of each cutting element is not on the same axis, which is the axis in the width direction of the automatic mower.

[0019] In some embodiments, the automatic mower further includes a control module configured to control the automatic mower to walk along a first preset path, and during the walking, control the cutting element to rotate in a preset direction, so that under the rotating action of the cutting element, the grass clippings are discharged from the open side where the cutting element rotates to form a grass accumulation link on one side of the automatic mower.

[0020] In some embodiments, when the control module controls the automatic mower to walk along a second preset path, it is further configured to control the cutting element to pass through the grass accumulation link formed when the cutting element works on the first preset path to scatter the grass accumulation link; wherein the side of the first preset path towards the grass accumulation link formed on the path itself is the side where the second preset path is located.

[0021] In some embodiments, the first preset path and the second preset path are adjacent, and the automatic mower travels in opposite directions in the first preset path and the second preset path; in the first preset path, the cutting element rotates in a first direction, and in the second preset path, the cutting element rotates in a second direction, and the first direction and the second direction are opposite.

[0022] In some embodiments, the first direction is clockwise, and the second direction is counterclockwise. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are provided to explain the present application and are not meant to limit the present application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0025] Figure 1 A bottom view of the structure of the mower described in some embodiments of the present application;

[0026] Figure 2 A Figure 1 An enlarged schematic view of the structure at circle A in the figure;

[0027] Figure 3 A front view of the structure of the mower described in some embodiments of the present application;

[0028] Figure 4 A rear view of the structure of the mower described in some embodiments of the present application;

[0029] Figure 5 Schematic views of the mower described in some embodiments of the present application reciprocatingly cutting during mowing, respectively.

[0030] 100, mower; 10, body; 11, front end; 20, cutting device; 22, cutting element; 221, cutter head; 222, blade; 30, protection device; 31, shield; 311, first side edge; 312, second side edge; 313, opening; 314, front edge; 315, opening; 316, rear skirt; 31a, arc segment; 31b, cutting area; 31c, horizontal tangent; 32, guardrail; 321, toothed part; 32a, inclined surface; 40, floating cover; 41, gap; 42, horizontal surface; 50, drive wheel; 60, steering wheel; 200, grass to be cut; 210, grass after maintenance; 220, grass accumulation link; 300, first preset path; 400, second preset path; X, direction of travel; Y, width direction. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0032] As an important mechanical cutting tool for trimming lawns, vegetation, automatic mowers are widely used in the fields of agriculture, gardens and the like. In order to prevent the user from being easily injured during operation, a protective device is usually provided on the traditional automatic mower. However, the applicant has noticed that after the protective device is added, although the safety problem can be solved, it also brings the problem of grass accumulation. Especially for wet grass working conditions, a large amount of grass clippings will accumulate at the bottom of the automatic mower in a short time during mowing, resulting in the loss of the cutting space (such as the cutting width) at the bottom of the automatic mower, which seriously affects the cutting quality and cutting efficiency.

[0033] Based on this, in order to effectively solve the problem that the traditional automatic mower 100 cannot balance cutting safety and cutting efficiency, the applicant has designed an automatic mower 100 after in-depth research. Please refer to Figure 1 , the automatic mower 100 comprises a machine body 10, a cutting device 20 and a protective device 30. The cutting device 20 comprises a cutting element 22 arranged at the bottom of the machine body 10, which rotates around its own axis under the driving action. The protective device 30 comprises a shield 31 arranged on the machine body 10, and the shield 31 is arranged on the cutting element 22; the shield 31 has a first side edge 311 and a second side edge 312 arranged oppositely. The direction from the first side edge 311 to the second side edge 312 is used to intersect with the advancing direction X of the automatic mower 100, and the first side edge 311 and / or the second side edge 312 is / are provided with an opening 313 for discharging the grass clippings in the shield 31. The protective device 30 further comprises at least one protective fence 32 arranged on the machine body 10 and opposite to the opening 313, for providing shielding for the opening 313.

[0034] The above-mentioned automatic mower 100, in the process of mowing, utilizes the motor to drive the cutting element 22 to rotate to cut the grass 200 to be cut. After cutting, the generated grass clippings will accumulate in the shield 31. Therefore, the opening 313 for discharging the grass clippings in the shield 31 is arranged on the first side edge 311 and / or the second side edge 312, that is, at least one of the two side edges of the shield 31 is in an open state, so that the grass clippings accumulated in the shield 31 are timely discharged from the opening 313 on at least one side under the rotation of the cutting element 22, avoiding the loss of cutting width due to the accumulation of a large amount of grass clippings in the shield 31 in a short time, effectively reducing the amount of grass accumulation in the shield 31, improving the cutting quality, and being beneficial to improve the cutting efficiency. At the same time, the protective fence 32 is arranged at the corresponding position of the opening 313 to provide shielding for the opening 313, avoiding the direct exposure of the cutting element 22 at the opening 313, thereby meeting the needs of safety protection.

[0035] It should be noted that the direction formed from the first side edge 311 to the second side edge 312 can be understood as a direction in the width direction Y of the automatic mower 100. The shroud 31 refers to a structure that covers the cutting element 22 to avoid direct exposure of the cutting element 22, and has a certain protective effect on the cutting element 22. When the shroud 31 covers the cutting element 22, it is located at the bottom of the machine body 10, but does not exceed the machine body 10 in the width direction Y, that is, the first side edge 311 and the second side edge 312 of the shroud 31 do not exceed the machine body 10.

[0036] The opening 313 can be designed in various ways on the first side edge 311 or the second side edge 312, such as: a closed port-like structure is formed in the middle of the first side edge 311 or the second side edge 312 to allow the grass clippings in the shroud 31 to be discharged; or a semi-open port-like structure is formed on the edge of the first side edge 311 or the second side edge 312; or the first side edge 311 or the second side edge 312 is completely cut off, so that the first side edge 311 or the second side edge 312 of the shroud 31 is in a completely open state, etc.

[0037] Meanwhile, the opening 313 can also have various designs, such as: the opening 313 can be but is not limited to square, semicircular, semi-elliptical, trapezoidal, etc.

[0038] It should be noted that the guardrail 32 refers to a structure that blocks and protects the opening 313 in the direction formed from the first side edge 311 to the second side edge 312 (such as the width direction Y). When the guardrail 32 is installed on the machine body 10, at least part of it will be located outside the first side edge 311 or the second side edge 312, so as to form a grass discharge gap between the guardrail 32 and the first side edge 311 or the second side edge 312. By designing the guardrail 32 in front of the opening 313, the grass clippings discharged from the opening 313 can be blocked to some extent, so that the discharged grass clippings are neatly stacked under the blockage of the guardrail 32.

[0039] In addition, the guardrail 32 can be installed on the machine body 10 in various ways, such as: it can be but is not limited to bolted, clamped, welded, bonded, integrally formed, etc. Among them, the integrally formed can be stamping, bending, die casting, etc.

[0040] Further, please refer to Figure 1 The first side edge 311 and the second side edge 312 are each provided with an opening 313. The guardrail 32 includes at least two, and the first side edge 311 and the second side edge 312 are respectively arranged opposite to at least one guardrail 32. As can be seen, the two side edges of the shroud 31 are in an open state, which not only improves the ability of the grass clippings in the shroud 31 to be discharged, but also effectively solves the problem of grass throwing after cutting.

[0041] For example: please refer to Figure 5 ,Figure 5 (a) is a mowing operation schematic diagram when the automatic mower 100 starts to advance; Figure 5 (b) is a mowing operation schematic diagram after the automatic mower 100 turns for the first time; Figure 5 (c) is a mowing operation schematic diagram after the automatic mower 100 turns for the second time. When the automatic mower 100 moves along the advancing direction X, the cutting element 22 rotates clockwise, and the grass clippings in the shroud 31 are thrown out of the right opening 313 and accumulated on the right side of the maintained grass 210 to form the grass accumulation link 220. When the automatic mower 100 moves to the end of the grassland, the advancing direction X of the automatic mower 100 and the rotating direction of the cutting element 22 are changed to rotate counterclockwise according to the path planned by the RTK (Real Time Kinematic) for the first time. At this time, the grass clippings in the shroud 31 are still thrown out of the right opening 313 and accumulated on the right side of the grass accumulation link 220 under the action of the cutting element 22. At the same time, the cutting element 22 disperses the grass accumulation link 220 accumulated by the last cutting through the left opening 313. In this way, the grass clippings are always accumulated on the right side of the maintained grass 210 in the next cycle, and the grass accumulation link 220 is always dispersed in the last cycle, which effectively solves the problem of grass throwing after cutting.

[0042] At the same time, please refer to Figure 1 The guardrails 32 are at least two. The at least two guardrails 32 are respectively located on the opposite sides of the shroud 31 and are respectively arranged opposite to the first side edge 311 and the second side edge 312, so that the opposite sides of the shroud 31 both meet the safety protection requirements. It is not difficult to understand that the first side edge 311 and the second side edge 312 both have opposite guardrails 32, which means that the first side edge 311 and the second side edge 312 both have a grass dispersing distance with the guardrails 32. In this way, the grass clippings discharged from the two side openings 313 are regularly stacked under the blockage of the guardrails 32 by using the grass dispersing distance, so as to improve the neatness and regularity of the grass accumulation link 220. The size of the grass dispersing distance can be set according to the actual product size and mowing performance.

[0043] It should be noted that when the guardrails 32 are designed to protect the openings 313, the guardrails 32 should extend along the length direction of the first side edge 311 or the second side edge 312. The specific size relationship between the guardrails 32 and the first side edge 311 or the second side edge 312 can be determined according to actual protection requirements, such as: the extension length of the guardrails 32 reaches half of the length of the first side edge 311 or the second side edge 312; or the extension length of the guardrails 32 reaches three quarters of the length of the first side edge 311 or the second side edge 312; or the extension length of the guardrails 32 is greater than the length of the first side edge 311 or the second side edge 312.

[0044] Specifically, please refer toFigure 1 The extension length of the guard rail 32 is greater than the length of the first side edge 311 and greater than the length of the second side edge 312. In this way, the entire length of the first side edge 311 and the second side edge 312 is shielded, providing better protection for both sides of the shield 31.

[0045] In some embodiments, the length of the opening 313 is at least 1 / 2 of the length of the guard rail 32. The length of the opening 313 affects the grass discharging performance of the automatic mower 100. If the length of the opening 313 is too small, grass is likely to accumulate in the shield 31, affecting the mowing efficiency. Therefore, the length of the opening 313 is designed to be not less than half the length of the guard rail 32 to ensure that the opening 313 has sufficient grass discharging capacity. The length of the opening 313 refers to the length of the opening 313 in the direction of travel X. Similarly, the length of the guard rail 32 refers to the length of the guard rail 32 in the direction of travel X.

[0046] Of course, the length of the opening 313 should also be less than the length of the corresponding guard rail 32 to avoid a part of the opening 313 not being shielded.

[0047] In some embodiments, please refer to Figure 3 The guard rail 32 has a plurality of tooth-shaped components 321 arranged at intervals. The end of the tooth-shaped component 321 close to the ground has a height H from the ground that is greater than or equal to 20 mm and less than or equal to 50 mm. In this way, the height between the tooth-shaped component 321 and the ground is reasonably designed to avoid the tooth-shaped component 321 being too high, exceeding the safety protection requirements, or being too low, increasing the travel resistance of the automatic mower 100. Therefore, the height H of the tooth-shaped component 321 is designed to be 20 mm < H < 50 mm to reduce the travel resistance of the automatic mower 100 while meeting the safety protection requirements, ensuring stable mowing.

[0048] It should be noted that the tooth-shaped component 321 refers to a structure arranged on the guard rail 32 and shaped like a tooth. The tooth-shaped structure is formed by the mutual spacing of two adjacent tooth-shaped components 321, which can effectively reduce the influence of grass on the automatic mower 100 when the automatic mower 100 turns, and improve the sluggishness of the automatic mower 100 when it turns.

[0049] Further, please refer to Figure 3 The tooth-shaped component 321 is arranged in a direction towards the ground on the guard rail 32. As can be seen, the guard rail 32 has a plurality of structures arranged at intervals and protruding towards the ground, which makes the end of the guard rail 32 towards the ground have a comb-like structure as a whole to reduce the resistance of the automatic mower 100 when it turns.

[0050] In some embodiments, the distance D between the ends of the toothed members 321 close to the ground in any two adjacent toothed members 321 is less than or equal to 50 mm. That is, the distance between the toothed members 321 should not be too large, otherwise the protection performance on both sides of the guard 31 will be reduced.

[0051] Of course, in the design of the toothed members 321, the distance between the toothed members 321 should also not be too small. If the distance between the toothed members 321 is designed to be too small, the toothed members 321 on the guard rail 32 will be too dense, which will make the automatic mower 100 more likely to be entangled by the grass when turning, and thus become more sluggish.

[0052] Specifically, referring to Figure 3 , the distance D between the ends of the toothed members 321 away from the guard rail 32 in any two adjacent toothed members 321 is 37.8 mm. This can effectively protect both sides of the guard 31, and also avoid the problem of too much density affecting the turning of the automatic mower 100, ensuring the stable operation of the automatic mower 100.

[0053] In some embodiments, referring to Figure 2 , the thickness T of the toothed members 321 in the direction from the first side edge 311 to the second side edge 312 is greater than or equal to 3 mm. In this way, the transverse thickness of the toothed members 321 is controlled to avoid being too thin and easily entangled with the grass, thereby ensuring smooth movement of the automatic mower 100.

[0054] In order to make the toothed members 321 less likely to entangle with the grass, one end of the toothed members 321 can be blunted to make the contact between the toothed members 321 and the grass more smooth and gentle. For example, the end of the toothed members 321 can be designed as a rounded end.

[0055] In some embodiments, the toothed members 321 are provided with an inclined surface 32a on the side facing the direction of travel X of the automatic mower 100; the inclined surface 32a is arranged at an obtuse angle with the horizontal plane 42 on which the machine body 10 is located. That is, when the automatic mower 100 moves in the direction of travel X, the inclined surface 32a of the toothed members 321 will contact the grass and guide the grass to the tail of the automatic mower 100 at the inclined angle, effectively reducing the entanglement between the toothed members 321 and the grass, thereby making the turning of the automatic mower 100 more smooth.

[0056] It should be noted that the angle between the inclined surface 32a and the horizontal plane 42 on which the machine body 10 is located can be selected in various ways, such as: the angle θ between the inclined surface 32a and the horizontal plane 42 can be any value between 90° (not including 90°) and 150°; or the angle θ between the inclined surface 32a and the horizontal plane 42 can be any value between 150° and 180° (not including 180°), etc.

[0057] Specifically, the angle θ between the inclined surface 32a and the horizontal surface 42 is 125.2°.

[0058] It should be noted that the shape of the toothed component 321 has various designs, which are not limited in the embodiment, and only needs to satisfy that one side surface thereof is arranged in an inclined manner and can be arranged at an obtuse angle with the horizontal surface 42 on which the machine body 10 is located, for example, the toothed component 321 is designed as a trapezoidal structure, at this time, the inclined surface 32a is arranged on the waist of the trapezoidal structure; or the toothed component 321 can also be designed as other polygonal structures, etc.

[0059] In addition, one end of the inclined surface 32a towards the ground can be designed as a circular arc structure, so that the part of the toothed component 321 in contact with the lawn or grass is relatively smooth, avoiding the phenomenon of pulling grass and accumulating grass due to the sharp edge, which affects the smooth running or passability of the automatic lawn mower 100.

[0060] In some embodiments, please refer to Figure 1 and Figure 4 The shroud 31 also has a rear skirt 316 connected between the first side edge 311 and the second side edge 312. In the advancing direction X, the rear skirt 316 is located at the rear side of the cutting element 22, the rear skirt 316 is located at the rear side of the cutting element 22, and at least part of the rear skirt 316 has a circular arc segment 31a; the circular arc segment 31a is at least partially the same as the curvature of the cutting element 22. In this way, the rear skirt 316 better adapts to the cutting element 22, increases the rear protection of the shroud 31, changes the direction of grass throwing after cutting, and is beneficial to improve the grass throwing capacity.

[0061] It should be noted that the at least part of the rear skirt 316 as the circular arc segment 31a should be understood as: the circular arc segment 31a on the rear skirt 316 can be one, two, three or more. When the circular arc segment 31a on the rear skirt 316 is more than two, the cutting element 22 also corresponds to more than two. At this time, the circular arc segment 31a and the cutting element 22 are one-to-one corresponding configuration, that is, one circular arc segment 31a is arranged around the periphery of one cutting element 22, and the axis of the cutting element 22 is taken as the center.

[0062] Specifically, please refer to Figure 1 The circular arc segment 31a and the cutting element 22 are both two. The two cutting elements 22 are arranged side by side at the bottom of the machine body 10. The two circular arc segments 31a and the two cutting elements 22 are one-to-one corresponding.

[0063] It should be noted that, please refer to Figure 1The cutting element 22 comprises a cutter head 221 and a blade 222 arranged on the cutter head 221. The motor drives the cutter head 221 to rotate around its own axis. When the cutter head 221 rotates, the blade 222 is unfolded on the cutter head 221 to cut the grass. At this time, the rear skirt 316 is at least partially a circular arc segment 31a with the axis of the cutter head 221 as the center, and forms a circular cutting area 31b with the cutter head 221.

[0064] Further, please refer to Figure 1 The shroud 31 further has a front edge 314 between the first side edge 311 and the second side edge 312. In the travel direction X, the front edge 314 is located at the front side of the cutting element 22, and the front edge 314 is arranged opposite to the rear skirt 316. The front edge 314 is provided with an opening 315 for the grass 200 to be cut to enter the shroud 31. Therefore, when the automatic mower 100 moves in the travel direction X, the grass to be cut passes the front edge 314 closest and enters the shroud 31 from the opening 315. At this time, the grass entering the shroud 31 is cut under the action of the cutting element 22. In this way, the opening 315 is arranged on the front edge 314, so that the grass 200 to be cut enters the shroud 31 more conveniently, and ensures that the grass in the travel direction X can be effectively and stably cut, improving the cutting quality.

[0065] It should be noted that the front edge 314 should be understood as a side edge of the shroud 31 closer to the front end 11 of the machine body 10; or it can be understood as a side edge of the shroud 31 that first contacts the grass to be cut along the travel direction X. In addition, the opening 315 can be cut on the front edge 314 to form a mouth-shaped structure; or the front edge 314 can be designed as a relatively flat structure, and the distance between the front edge 314 and the ground is raised, so that the front edge 314 and the first side edge 311 and the second side edge 312 form a mouth-shaped structure for the grass to be cut to enter, etc.

[0066] In some embodiments, please refer to Figure 1To ensure that the cut grass can be better thrown out of the opening 313 by the cutting element 22, the cutting element 22 can form a circular cutting area 31b when rotating, the cutting area 31b has an outermost end point on the side of the opening 313 along the width direction Y of the automatic mower 100, and a tangent line on the end point is defined as a horizontal tangent line 31c. The end of the rear edge close to the opening 313 does not exceed the horizontal tangent line 31c, that is, the end of the rear edge close to the opening 313 is located on the side of the horizontal tangent line 31c away from the opening 313. In this way, the throwing path of the cut grass at the end point is outside the rear edge, so that the cut grass can be thrown out of the opening 313, and the cut grass thrown out is prevented from being caught by the end of the rear edge. At the same time, the end of the rear edge close to the opening 313 is designed not to exceed the horizontal tangent line 31c, so as to reduce the shielding space on the rear side of the cutting element 22 under the premise of ensuring the protection of the cutting element 22, which is conducive to expanding the space range on the side of the opening 313 of the cutting element 22.

[0067] It should be noted that the cutting element 22 includes a cutter head 221 and a blade 222 arranged on the cutter head 221. During rotation, the end of the blade 222 away from the cutter head 221 rotates to form a circular profile, which can be understood as the cutting area 31b. The blade 222 can be designed to be fixed on the cutter head 221, or can be designed to have a telescopic structure, for example, the blade 222 extends out of the cutter head 221 under the centrifugal force during rotation, and the blade 222 is automatically stored in the cutter head 221 when not rotating, so as to protect the blade 222.

[0068] In some embodiments, referring to Figure 1 The automatic mower 100 further includes a floating cover 40 movably arranged on the body 10 and extending along the periphery of the shroud 31 from a position opposite to the first side edge 311 to a position opposite to the second side edge 312. The guard rail 32 is arranged on the floating cover 40 and at least partially protrudes from the floating cover 40. As can be seen, the floating cover 40 extends around at least half of the periphery of the shroud 31 to provide front-end protection for the cutting element 22 in the shroud 31, ensuring that the cutting is safe and stable. In addition, the guard rail 32 is arranged on the floating cover 40, so that the guard rail 32 is also in a movable state on the body 10. In this way, when the guard rail 32 encounters a higher obstacle, it can be moved around the obstacle to avoid being stuck and stopping working when the automatic mower 100 is running.

[0069] It should be noted that the floating cover 40 is movably arranged on the body 10, which is not limited, as long as the floating cover 40 can move on the body 10, for example, the floating cover 40 is arranged on the body 10 by a spring, a torsional spring, elastic rubber or the like.

[0070] Further, referring to Figure 1, the gap 41 between the floating cover 40 and the driving wheel 50 of the automatic mower 100 is at least partially projected on the shroud 31 along the direction from the first side edge 311 to the second side edge 312. In this way, the gap 41 between the driving wheel 50 and the floating cover 40 corresponds to the shroud 31, avoiding the gap 41 from being opposite to the opening 313 on the first side edge 311 and / or the second side edge 312, and the cutting element 22 is exposed, avoiding the cutting element 22 from being mistakenly extended into the cutting area 31b to cause a safety accident, thereby further improving the safety protection performance of the automatic mower 100.

[0071] Further, please refer to Figure 1 The automatic mower 100 further comprises a steering wheel 60, which is arranged on the bottom of the body 10 and is located on the opposite side of the shroud 31 from the driving wheel 50.

[0072] Optionally, the connection manner of the guardrail 32 on the floating cover 40 can be, but is not limited to, bolt connection, clamping, pin connection, etc.

[0073] In some embodiments, the guardrail 32 is integrated with or detachably connected to the floating cover 40. In this way, the guardrail 32 on the floating cover 40 can be individually disassembled, which is convenient for the maintenance of the guardrail 32.

[0074] In some embodiments, please refer to Figure 1 The cutting element 22 comprises at least two groups, and the axis of each cutting element 22 is not on the same axis, and the axis is the axis of the width direction Y of the automatic mower 100. In this way, the axis of each cutting element 22 is designed not to be on the same axis, so that each cutting element 22 is distributed in a staggered manner on the body 10, avoiding being arranged in a straight line to cause the occupied space to be large, which is beneficial to improve the structural compactness of the automatic mower 100.

[0075] In some embodiments, the automatic mower 100 further comprises a control module. The control module is configured to control the automatic mower 100 to walk along the first preset path 300, and in the process of walking, control the cutting element 22 to rotate in a preset direction, so that the grass clippings are discharged from the opening 313 on the side of the cutting element 22 to form the grass accumulation link 220 on one side of the automatic mower 100 under the action of the rotation of the cutting element 22. Therefore, in the mowing operation, the grass clippings accumulated in the cutting guard 31 are discharged from the opening 313 in a timely manner to form the grass accumulation link 220 on one side of the automatic mower 100 under the action of the rotation of the cutting element 22, avoiding the loss of cutting width due to the accumulation of a large amount of grass clippings in the cutting guard 31 in a short time, effectively reducing the amount of grass accumulated in the cutting guard 31, improving the cutting quality, and being conducive to improving the cutting efficiency. In addition, according to the rotation direction of the cutting element 22, the crushed grass is discharged to one side to form the grass accumulation link 220, effectively solving the uniformity of cutting, and having a better mowing visual effect.

[0076] It should be noted that the control module refers to a device capable of controlling the rotation of the cutting element 22, such as: but not limited to a single-chip microcomputer or an editable logic controller.

[0077] Further, please refer to Figure 5 , the control module controls the automatic mower 100 to walk along the second preset path 400, and is further configured to control the cutting element 22 to pass through the grass accumulation link 220 formed by the first preset path 300 to scatter the grass accumulation link 220; wherein the side of the first preset path 300 towards the grass accumulation link 220 formed on the path is the side where the second preset path 400 is located. Therefore, when the automatic mower 100 finishes working along the first preset path 300, the control module can control the automatic mower 100 to work on the second preset path 400. Since the second preset path 400 is located on the side of the first preset path 300 towards the grass accumulation link 220, when mowing on the second preset path 400, the rotating cutting element 22 will scatter the grass accumulation link 220 on the first preset path 300, and form a new grass accumulation link 220 on the side of the second preset path 400 away from the first preset path 300, to solve the problem of throwing grass after cutting.

[0078] It should be noted that the second preset path 400 refers to the path located on one side of the first preset path 300. When designing the working path, the interval between the second preset path 400 and the first preset path 300 should not be too large, and the interval should be ensured to be able to guarantee that the cutting element 22 can pass through the accumulated grass link 220 formed on the first preset path 300 when the automatic mower works on the second preset path 400. When the cutting element 22 passes through the accumulated grass link 220, the accumulated grass will be scattered under the rotating force of the cutting element 22, and the cut grass on the second preset path 400 will be thrown out from the opening 313 under the action of the cutting element 22 to form a new accumulated grass link 220.

[0079] There are various implementation manners for the transition from the first preset path 300 to the second preset path 400, such as: when the automatic mower 100 walks to the end of the first preset path 300, the automatic mower 100 enters the second preset path 400 by turning around, at this time, the rotating direction of the cutting element 22 needs to be changed; or, the automatic mower 100 changes lanes from the first preset path 300 to the second preset path 400 in a reverse manner, at this time, the rotating manner of the cutting element 22 can remain unchanged, and the like.

[0080] Further, the first preset path 300 is adjacent to the second preset path 400, and the travel direction X of the automatic mower 100 in the first preset path 300 and the second preset path 400 is opposite. In the first preset path 300, the cutting element 22 rotates in a first direction, and in the second preset path 400, the cutting element 22 rotates in a second direction, and the first direction and the second direction are opposite.

[0081] Therefore, please refer to Figure 5 When the automatic mower 100 works on the first preset path 300, the cutting element 22 rotates in the first direction, throws the grass clippings in the shroud 31 from the right side and accumulates the grass clippings on the right side of the automatic mower 100 to form the accumulated grass link 220; when the automatic mower 100 moves to the end of the first preset path 300, the travel direction X of the automatic mower 100 and the rotating direction of the cutting element 22 are changed, so that the cutting element 22 rotates in the second direction for cutting work on the second preset path 400. At this time, the grass clippings in the shroud 31 are still thrown out from the right side and accumulated on the right side of the second preset path 400 under the action of the cutting element 22; at the same time, the cutting element 22 scatters the cut and accumulated grass clippings on the first preset path 300; in this way, the cut grass clippings are always accumulated on the right side of the automatic mower 100, and the accumulated grass link 220 formed on the previous path is always scattered, which effectively solves the problem of throwing the cut grass.

[0082] It should be noted that the automatic mower 100 can have multiple paths when working, for example, a first preset path 300 and a second preset path 400 are a working cycle, specifically: first preset path 300, second preset path 400, first preset path 300, second preset path 400, …, first preset path 300, second preset path 400, etc. in parallel and interval, wherein "…" represents the omission of several first preset paths 300 and second preset paths 400. When the automatic mower 100 works on the second preset path 400 and turns to the first preset path 300 adjacent to it, the control module also controls the cutting element 22 to pass through the grass accumulation link 220 formed on the second preset path 400.

[0083] It should be noted that the first direction is opposite to the second direction, for example, the first direction is clockwise and the second direction is counterclockwise, or the first direction is counterclockwise and the second direction is clockwise.

[0084] In some embodiments, the first direction is clockwise and the second direction is counterclockwise.

[0085] The technical features of the above-described embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure.

[0086] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

[0087] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0088] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated elements. Thus, a feature defined with "first" or "second" can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0089] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0090] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0091] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment.

Claims

1. An automatic mower comprising: a machine body; a cutting device comprising a cutting element arranged at the bottom of the machine body, the cutting element being rotatable about its own axis under the action of a drive; a protection device comprising a shield arranged on the machine body, the shield being arranged on the cutting element; characterized in that the shield has a first side and a second side arranged opposite each other, a direction from the first side to the second side being arranged to intersect with a direction of travel of the automatic mower, the first side and the second side each having an opening for discharging grass clippings from inside the shield, under the action of rotation of the cutting element, the grass clippings being discharged from the opening on the side from which the cutting element is turned to form a grass accumulation link on one side of the automatic mower; the protection device further comprises at least one guard rail arranged on the machine body and opposite the opening, for providing shielding for the opening.

2. The automatic lawnmower according to claim 1, characterized in that The protection device comprises at least two guard rails, the first side and the second side being arranged opposite the at least one guard rail respectively.

3. The automatic mower of claim 1, wherein, The length of the opening is at least 1 / 2 of the length of the guard rail.

4. The automatic mower of claim 1, wherein, The guard rail has a plurality of tooth-like components arranged at intervals; an end of the tooth-like component close to the ground has a height H from the ground that is greater than or equal to 20 mm and less than or equal to 50 mm.

5. The automatic lawnmower according to claim 4, characterized in that, The tooth-like component is arranged protruding in a direction towards the ground on the guard rail.

6. The automatic lawnmower according to claim 4, characterized in that In any two adjacent tooth-like components, the distance D between the ends of the tooth-like components close to the ground is less than or equal to 50 mm.

7. The automatic mower of claim 4, wherein, The thickness T of the tooth-like component in the direction from the first side to the second side is greater than or equal to 3 mm.

8. The automatic mower of claim 4, wherein, The tooth-like component is provided with an inclined surface on a side facing the direction of travel of the automatic mower; the inclined surface is arranged at an obtuse angle with the horizontal plane on which the machine body is arranged.

9. The automatic mower of claim 1, wherein, The shield further has a rear skirt connected between the first side and the second side; in the direction of travel, the rear skirt is located on the rear side of the cutting element, the rear skirt is located on the rear side of the cutting element, and at least part of the rear skirt has a circular arc segment; the circular arc segment is at least partially the same as the curvature of the cutting element.

10. The automatic lawnmower according to claim 9, characterized in that, The shield further has a front edge between the first side and the second side; in the direction of travel, the front edge is located on the front side of the cutting element, the front edge is arranged opposite the rear skirt, and the front edge is provided with an opening for allowing grass to be cut to enter the shield.

11. The automatic lawnmower according to claim 10, characterized in that, The automatic mower further comprises a floating cover, the floating cover being movably arranged on the machine body and extending along the periphery of the shield from a position opposite the first side to a position opposite the second side; the guard rail is arranged on the floating cover and at least partially protrudes from the floating cover.

12. The automatic lawnmower according to claim 11, characterized in that There is a gap between the floating cover and the drive wheel of the automatic mower, the area formed by the projection of the gap in the direction from the first side to the second side is at least partially on the shield.

13. The automatic lawnmower according to claim 11, characterized in that, The guard rail is integrally formed with the floating cover or detachably connected to the floating cover.

14. The automatic mower of claim 1, wherein, The cutting elements include at least two groups, and the shaft centers of the cutting elements are not on the same axis, which is an axis in the width direction of the automatic mower.

15. The automatic lawnmower according to claim 1, characterized in that, The automatic mower further includes a control module configured to control the automatic mower to walk along a first preset path, and control the cutting elements to rotate in a preset direction during walking.

16. The automatic lawnmower according to claim 15, characterized in that When the control module controls the automatic mower to walk along a second preset path, it is further configured to control the cutting elements to pass through a grass accumulation link formed when the cutting elements work along the first preset path, so as to scatter the grass accumulation link; wherein the first preset path is towards one side of the grass accumulation link formed along the first preset path, which is the side where the second preset path is located.

17. The automatic lawnmower according to claim 16, characterized in that The first preset path is adjacent to the second preset path, and the automatic mower moves in opposite directions in the first preset path and the second preset path; in the first preset path, the cutting elements rotate in a first direction, and in the second preset path, the cutting elements rotate in a second direction, the first direction and the second direction are opposite.

18. The automatic lawnmower according to claim 17, characterized in that The first direction is clockwise, and the second direction is counterclockwise.

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