CN113366964A - Cutting device and intelligent mower - Google Patents

Abstract

The invention discloses a cutting device and an intelligent mower, wherein the intelligent mower comprises: the intelligent mower comprises a machine shell, a moving assembly, a cutting motor and a cutting device, wherein the moving assembly is used for driving the intelligent mower to move; the cutting device includes: the cutting piece can move under the driving of the cutting motor; a guard structure comprising a bottom guard positioned below the cutting element to create a protective barrier below the cutting element; the protective structure is static relative to the cutting piece in the height direction; at least under the condition that the cutting device is lower than the machine shell, the protective structure can drive the cutting device to move upwards relative to the machine shell when being subjected to external force from bottom to top. The method and the device have high safety and good trafficability, are particularly suitable for scenes needing to be cut to the edge, and can better meet the comprehensive requirements of users.

Description

Cutting device and intelligent mower

Technical Field

The invention relates to the technical field of electric garden tools, in particular to a cutting device and an intelligent mower.

Background

The intelligent lawn mower is an electric garden tool for trimming lawns, vegetation and the like, and is provided with: the system has the functions of automatic walking, anti-collision, wire outgoing prevention within a specified range, automatic return charging, safety detection, battery power detection and the like. On the whole, the intelligent mower can autonomously finish the work of trimming the lawn, does not need manual direct control and operation, and has low power, low noise and exquisite and attractive appearance.

Intelligent lawn mower mainly includes: the control unit is used for controlling the automatic walking and executing the cutting work; the intelligent mower comprises a shell, a moving assembly for driving the intelligent mower to move, a cutting device for executing cutting operation and the like. The cutting device is typically disposed below the housing.

Currently, some smart lawn mowers place the cutting device far from the boundary of the fuselage for safety reasons so that the operator does not touch the cutting element even if the operator inserts his feet under the fuselage. However, when the cutting device is located further from the boundary of the fuselage, the problem of an uncut edge arises, for example when the cutting element encounters obstacles such as corners, fences, steps, etc., a wider uncut area is formed. These wide areas that cannot be cut with an intelligent lawnmower often require manual trimming, which is time consuming and labor intensive.

In order to solve the above problem, a feasible way is to reduce the distance from the cutting device to the boundary, and install a protection mechanism on the housing, and the protection mechanism can be used to establish a protection barrier to prevent human tissue from extending into the lower part of the body and causing injury.

However, after the protection mechanism is mounted on the housing, the height from the bottom end of the protection mechanism to the ground is a fixed value, which may affect the trafficability of the intelligent lawn mower. For example, as for an intelligent mower, the intelligent mower generally has a plurality of gears, and in order to ensure that the intelligent mower can play a safety protection role in all gears, the bottom end of the protection mechanism needs to isolate a cutter head located at the lowest gear, and the height of the protection mechanism from the ground is necessarily lower. If the bottom end of the protection mechanism is higher than the cutter head when the intelligent mower is in a lower gear, i.e. the cutter head cannot be protected, in order to ensure the passing performance of the intelligent mower, the safety of the intelligent mower is inevitably reduced.

In summary, in view of the defects in the prior art, there is a need to provide a new intelligent lawn mower, which can ensure the cutting edge, and has high safety and good trafficability when in use, so as to better satisfy the comprehensive requirements of users.

Disclosure of Invention

In view of the defects of the prior art, an object of the present application is to provide a cutting device and an intelligent lawn mower, which have strong safety and good passing performance, are particularly suitable for scenes requiring to ensure cutting to the side, and can better meet the comprehensive requirements of users.

The above object of the present invention can be achieved by the following technical solutions:

an intelligent lawn mower comprising: the intelligent mower comprises a shell and a moving assembly, wherein the shell is used for driving the intelligent mower to move; a cutting motor for providing a driving force for a cutting operation, a cutting device for performing a cutting operation by the driving of the cutting motor, the cutting device comprising: the cutting piece can move under the driving of the cutting motor; a guard structure comprising a bottom guard positioned below the cutting element to create a protective barrier below the cutting element; the protective structure is static relative to the cutting piece in the height direction; and at least under the condition that the cutting device is lower than the machine shell, the protective structure can drive the cutting device to move upwards relative to the machine shell when being subjected to external force from bottom to top.

In a preferred embodiment, the cutting means is eccentrically disposed below the housing, offset to one side of the housing.

In a preferred embodiment, the distance from the cutting member to the outermost side of the casing is 20 mm to 30 mm.

In a preferred embodiment, the guard structure further comprises a side guard located to the side of the cutting element to create a protective barrier to the side of the cutting element.

In a preferred embodiment, the cutting member is height-wise positionally adjustable, and the side guards and the bottom guard are raised and lowered along with the cutting member.

In a preferred embodiment, the lowermost ends of the side guards and the bottom guard are lower than the bottom end of the casing, at least when the cutting member is at the lowest cutting level.

In a preferred embodiment, the intelligent mower further comprises a floating height-adjusting mechanism for allowing the protective structure to drive the cutting element to move upwards when being subjected to a bottom-up external force.

In a preferred embodiment, the maximum height of the cutting member corresponding to the upward movement is between 50 mm and 55 mm.

In a preferred embodiment, the guard structure further comprises a guard disposed above the cutting element and connected to the side guard.

In a preferred embodiment, the side guard extends downward from a side of the shield to below the cutting member and is connected to the bottom guard, and a debris removal channel is formed between the guard structure and the cutting member.

In a preferred embodiment, the cutting member comprises a cutter disc and cutting blades arranged on the cutter disc, the bottom shield is positioned below the cutting blades of the cutting member, and the distance between the bottom shield and the cutting blades in the height direction is set to be 5-10 mm; the horizontal distance from the edge of the cutting piece to the side protection is set between 5 mm and 10 mm.

In a preferred embodiment, the bottom guard extends in a direction of travel of the smart mower, and a length of the bottom guard is greater than a cutting diameter of the cutting device.

In a preferred embodiment, the bottom protection is provided with a grass inlet which is a strip-shaped gap.

A cutting device, comprising: a cutting member capable of being driven for movement; a guard structure comprising a bottom guard positioned below the cutting element to create a protective barrier below the cutting element; the protective structure is static relative to the cutting piece in the height direction; at least under the condition that the cutting device is located at the lowest cutting position, the protective structure can drive the cutting device to move upwards when being subjected to external force from bottom to top.

In a preferred embodiment, the protection structure further comprises a side protection, the side protection is located at the side of the cutting member to establish a protection barrier at the side of the cutting member, the cutting device is in transmission connection with a cutting motor, the protection structure further comprises a protection cover and a motor cylinder arranged outside the cutting motor, the upper end of the protection cover is connected with the motor cylinder, the lower end of the protection cover is used for connecting the side protection at one side close to a machine shell, and the side protection extends downwards from the protection cover to the position below the cutting member and is fixed with the bottom protection; one end of the bottom guard is fixed with the side guard, and the other end of the bottom guard extends to the position below the cutting piece; a chip removal channel is formed between the protective structure and the cutting piece opposite to the protective structure.

Advantageous effects

The intelligent lawn mower that provides in the embodiment of this application has set up protective structure through side and the below at the cutting piece, and this protective structure and cutting piece are at direction of height relative static, have guaranteed at least cutting device is less than under the condition of casing, protective structure can drive during receiving external force from bottom to top cutting device for the casing is the activity of making progress to guarantee that this lawn mower has stronger security and better trafficability characteristic, specially adapted needs cut the use scene on limit, can satisfy user's comprehensive demand better.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive labor.

FIG. 1 is a top view of a smart lawn mower provided in accordance with an embodiment of the present application;

FIG. 2 is a bottom view of the intelligent lawnmower of FIG. 1;

FIG. 3 is a front view of the intelligent lawn mower of FIG. 1;

FIG. 4 is a cross-sectional view A-A of the intelligent mower of FIG. 1 in the lowest gear;

FIG. 5 is a cross-sectional view A-A of the intelligent mower of FIG. 1 in a top gear;

fig. 6 is a schematic structural diagram of a cutting device according to an embodiment of the present application.

Description of reference numerals:

1. a housing; 11. a front end; 12. a back end; 13. a first side; 14. a second side; 15. a top surface; 16. a bottom surface;

2. a moving assembly;

3. a cutting device; 30. cutting the piece; 31. a protective cover; 310. a protective structure; 311. side protection; 312. bottom protection; 32. cutting the motor; 33. a motor cartridge; 34. connecting sleeves; 35. a base;

4. a floating height-adjusting mechanism; 40. a gear adjustment member;

F. a forward direction;

l0, central axis;

l1, cutting to the margin;

and S, cutting a circle.

Detailed Description

The technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The application specification provides a cutting device and intelligent lawn mower, and this intelligent lawn mower can enough guarantee to cut the limit, has stronger security and better trafficability characteristic during the use simultaneously, has satisfied user's comprehensive demand better.

Referring to the smart lawn mower shown in fig. 1, 2 and 3, the smart lawn mower may generally include: the intelligent mower comprises a control unit for controlling the intelligent mower to automatically walk and execute cutting work, a machine shell 1, a moving assembly 2 for driving the intelligent mower to move, a cutting motor 32 for providing driving force for cutting operation, and a cutting device 3 for executing cutting operation under the driving of the cutting motor 32. In addition, the intelligent mower can also comprise a floating height adjusting mechanism 4 for adjusting the height of the cutting device 3 from the ground. Specifically, the floating height-adjusting mechanism 4 may be a floating height-adjusting mechanism 4 that limits only the current lowest position of the cutting device 3, and does not limit the upward movement of the cutting device 3.

Referring to fig. 4 to 6, the cutting device 3 may include: a cutter 30 movable by the drive of the cutter motor 32, the cutter 30 including a cutter deck and a cutting blade mounted on the cutter deck, and a guard structure 310 for establishing a protective barrier to the cutter 30.

The cutter 30 is movable by the drive of the cutter motor 32. Specifically, the guard structure 310 may include: a bottom shield 312. The bottom guard 312 is positioned below the cutter 30 to create a protective barrier below the cutter 30. The guard structure 310 may further include: side guards 311. The side guards 311 are positioned on the sides of the cutting member 30 to create a protective barrier on the sides of the cutting member 30.

In the height direction, the guard structure 310 is stationary relative to the cutter 30. At least under the condition that the cutting device 3 is lower than the machine shell 1, when the protective structure 310 is subjected to an external force from bottom to top, the whole cutting device 3 can be driven to lift upwards without being limited by the floating height-adjusting mechanism 4, so that the intelligent mower is ensured to have high safety and high trafficability, and the comprehensive requirements of users are better met.

Wherein, in case that the cutting device 3 is lower than the housing 1, i.e. exposed downwards from the housing 1, the obstacle crossing capability of the intelligent lawn mower is mainly dependent on the position of the cutting device 3. In order to prevent the cutting device 3 from being in a lower position and encountering obstacles to influence the travelling of the intelligent mower, the protective structure 310 moves up and down along with the cutting piece 30, and a protective barrier can be established for the cutting piece 30 at any height, so that the obstacles are prevented from directly contacting with the cutting piece 30, and the damage and the injury are avoided. The present application makes use of a floating height-adjustment mechanism 4 that allows the cutting device 3 to move upwards under external forces when it has a space that can move upwards, so that the machine's throughput is improved.

Further, in the case where the cutting device 3 is not lower than the casing 1, there may be a scene where the cutting device 3 needs to be lifted up. Specifically, for example, when a small animal or the like intrudes into the bottom of the housing 1, the cutting device 3 can float and raise the height-adjusting mechanism upward, and the cutting member 30 is prevented from directly contacting with the small animal, thereby effectively protecting the small animal. Or, in the non-operating state of the intelligent mower, since the cutting member 30 is relatively sharp, in the case that the cutting member 30 is relatively close to the housing 1, the user may touch the cutting member 30 with fingers during carrying with hands. And this application has set up protective structure 310 in the one side that cutting member 30 is close to casing 1 to this protective structure 310 can drive whole cutting device 3 upwards lifting when receiving the exogenic action, for example when the finger contacts bottom protection 312, thereby avoids cutting member 30 to contact the finger, has improved intelligent lawn mower's security.

In the present embodiment, the housing 1 is formed with a hollow cavity having a certain size for mounting various parts of the smart mower. Along the direction F of advance of the intelligent mower, the housing 1 has a front end 11 and a rear end 12 opposite to each other, and a first side 13 and a second side 14 connecting the front end 11 and the rear end 12, a top surface 15 and a bottom surface 16. As shown in fig. 1, the first side 13 is a right side of the casing 1 and the second side 14 is a left side of the casing 1 in the forward direction F.

In the present embodiment, the cutting device 3 is eccentrically disposed below the casing 1 as a whole toward one side of the casing 1, depending on the size of the casing 1 and the overall layout of the cutting device 3. Specifically, in the advancing direction F of the intelligent mower, the intelligent mower has a central axis L0, and the center of the cutting member 30 is offset to one side of the central axis L0, for example, to the right of the central axis L0.

In this embodiment, the cutting element 30 may be driven by a cutting motor 32 to perform a rotary motion, a reciprocating cutting motion, or other types of motions that may be used to cut grass. In the embodiment of the present application, the rotating motion of the cutting element 30 is taken as an example for explanation, and other motion forms can refer to the rotating motion, which is not described herein again.

When the cutting member 30 is driven by the cutting motor 32, the center of the cutting circle S formed by the cutting member 30 is offset from the central axis L0 of the intelligent lawn mower. The distance from the edge of the cutting circle S formed when the cutter 30 rotates to the housing 1 is within a predetermined range. The cutting member 30 rotates to form a cutting circle S having a distance L1 from the housing 1 (the first side 13 in the drawing). By controlling the distance from the cutting piece 30 to the casing 1, the cutting device 3 is close enough to the outer side wall of the casing 1, so that grass on the boundary line or the edge of an obstacle is cut, the edge is cut, and the trouble of manual trimming is avoided.

In this embodiment, considering the problem of spatial interference to be overcome by the cutting member 30 of the cutting device 3 during rotation, a guard structure 310 is provided between the cutting member 30 and the casing 1, and the predetermined range is determined to be optionally between 20 mm and 30 mm.

In this embodiment, the cutting member 30 may be embodied in the form of a rotatable cutter head. The shield 31 may be coaxially disposed with the cutting member 30 and may surround the cutting member 30. The cutting member 30 is rotatable by the cutting motor 32 to form a central axis of rotation. The guard structure 310 is stationary relative to the cutter 30 along the height direction (i.e., the extending direction of the rotation center axis), and can move in the height direction by the external force from bottom to top of the floating height adjustment mechanism.

Specifically, the protection structure 310 further includes a protection cover 31 and a motor barrel 33 disposed outside the cutting motor 32, the upper end of the protection cover 31 is connected to the motor barrel 33, and the lower end of the protection cover 31 is close to one side of the casing 1 and is connected to the side protection 311. The protective cover 31 may be integrally formed with the side protection 311, or may be fixedly connected to the side protection. The guard structure 310 is kept in synchronous movement with the cutter 30.

The manner in which the guard structure 310 and the cutting element 30 are relatively stationary in the height direction includes a variety of ways. As shown in fig. 3, the protective cover 31 and the motor barrel 33 may be fixed together by a fixing connection (e.g., screws). The cutter head can be fixed on the connecting sleeve 34 by means of a fixed connection (for example, screws). The coupling sleeve 34 is fixedly attached (e.g., press-fitted) to the shaft of the cutting motor 32, and the cutting motor 32 is fixedly attached (e.g., screwed) to the motor housing 33, thereby achieving a fixed relative position between the cutter disc and the guard structure 310 in the height direction. It should be noted that the above-mentioned fixed connection method is not limited to the above-mentioned example, and other methods that can achieve fixed connection may be used in general.

As shown in fig. 4 and 5, in one embodiment, the intelligent lawn mower is provided with a plurality of gears including: highest gear and lowest gear. The floating height-adjusting mechanism 4 comprises a gear adjusting piece 40, the gear adjusting piece 40 is used for adjusting gears and changing the height of the cutting piece 30 from the ground, and at least when the intelligent mower is located at the lowest gear, the lowest end of the cutting device 3 is lower than the bottom end of the machine shell 1.

In the present embodiment, the gear position of the intelligent mower refers to a distance from the ground of the cutting blade of the cutter 30. This distance characterizes how high the machine will cut grass while running. Specifically, the gear indication is in 20 (mm), 30 (mm), 40 (mm), 50 (mm), 60 (mm), each gear corresponding to one cutting height. Alternatively, the gear indication may be represented by numbers such as 1, 2, 3, 4, and 5, each of which corresponds to a cutting height, although the gear indication is not limited to a numerical value, and may be other characters such as english letters, roman letters, and the like, and the specific application is not limited thereto. As shown in fig. 4, when the intelligent lawn mower is located at the lowest level, the distance H1 between the tip of the cutting element 30 and the ground may be 20 mm. As shown in fig. 5, when the intelligent lawn mower is at the highest grade, the distance H2 between the tip of the cutting element 30 and the ground may be 60 mm.

In the present embodiment, the floating height adjustment mechanism 4 is used to limit only the current lowest position of the cutting device 3. In particular, the floating height-adjustment mechanism 4 can be used to achieve gear adjustment, determining the current height of the cutting member 30 from the ground, without limiting the upward movement of the cutting device 3 when subjected to a bottom-up external force.

In particular, the floating height adjustment mechanism 4 may be provided with a height adjustment structure as well as a gear adjustment member 40. Wherein the gear adjustment 40 may be in the form of a knob. The change of the height of the cutting device 3 above the ground is realized by rotating the knob to different gears and driving the height adjusting structure. Specifically, the height-adjusting structure may be a multi-link structure, a spring structure, or other forms for achieving floating height adjustment, and the application is not limited in particular herein.

For example, the multi-link structure may be a four-link structure in which the movement of the links may bring the motor barrel 33 up and down, thereby achieving the height adjustment of the motor barrel 33 and the cutting device 3. The height-adjusting structure can limit the distance between the motor barrel 33 and the lowest point of the working surface at the current cutting height, namely, the distance between the cutting blade of the cutting member 30 and the ground surface, and the upward moving range of the motor barrel 33 is determined by the distance between the base 35 and the motor barrel 33. The motor barrel 33 can float upward by a certain distance depending on the distance between the base 35 and the motor barrel 33.

Among them, it should be noted that: as long as the motor barrel 33 has enough floating distance from the base 35, when the cutting device 3 meets an obstacle at all gears, the cutting device can float upwards under the driving of the floating height-adjusting mechanism 4, so that obstacle crossing is realized. However, in order to prevent the height of the entire intelligent mower from being too high, and to prevent the height of the cutting member 30 from being large enough to substantially affect obstacle crossing when the intelligent mower is at the highest gear, it may be arranged that the top end of the motor can 33 abuts against the base 35 and cannot float upward when the intelligent mower is at the highest gear. That is, in the situation that the intelligent lawn mower is in the non-highest gear, when the protective structure 310 contacts an external obstacle, the cutting device 3 can move upwards under the driving of the floating height-adjusting mechanism 4.

Generally, in order to ensure smooth traveling of the intelligent lawn mower, the lowermost end of the housing 1 is also set to a certain distance from the ground, and may be, for example, about 40 mm. When the intelligent mower is in the lowest gear position, the cutting member 30 is at the lowest point, for example, 20 mm from the ground, and the cutting device 3 is exposed from the housing 1. In order to ensure that the cutting device 3 can be completely driven into the machine casing 1 by the floating height-adjusting mechanism 4 when the intelligent mower is positioned at the lowest level, the maximum height of the lowest point of the cutting member 30 which can move upwards relative to the lowest point of the front end 11 of the machine casing 1 along the height direction is between 50 mm and 55 mm.

Referring to fig. 6 in combination, in one embodiment, the protection structure 310 may include: a side guard 311 and a bottom guard 312. The side guards 311 extend downward from the shield 31 to below the cutter 30 and are fixed to the bottom guard 312; one end of the bottom guard 312 is fixed to the side guard 311, and the other end extends to the lower side of the cutting member 30; a debris evacuation passageway is formed between the guard structure 310 and its opposing cutting element 30.

In this embodiment, the side guard 311 and the bottom guard 312 may be entirely parallel to the housing 1 along the advancing direction F of the intelligent lawnmower. In the cross-sectional view of fig. 6, the side guard 311 may have a first extending direction. The bottom guard 312 has a second direction of extension. The first extending direction is substantially perpendicular to the second extending direction.

Wherein the first extension direction may be parallel or substantially parallel to the direction of gravity. The second direction of extension may be parallel or substantially parallel to the horizontal direction. When the bottom guard 312 is substantially parallel to the side guard 311, an effective gap between the guard structure 310 and the cutting element 30 can be ensured in a space-saving manner. The gap is used to form the debris removal channel. In the working process of the intelligent mower, the garbage such as grass, soil and branches can be discharged along the chip removal channel when the cutting piece 30 is rotated to cut, so that the cutting piece is prevented from being clamped on the cutting piece 30 and the normal operation of the intelligent mower is prevented from being influenced.

Specifically, in order to ensure that the intelligent mower discharges chips smoothly without affecting the cutting edge of the intelligent mower, the distance between the edge of the cutting member 30 and the side guard 311 is optionally between 5 mm and 10 mm. In addition, in order to ensure smooth chip discharge of the intelligent mower and reasonably control the height of the intelligent mower, the distance between the lower surface of the cutting blade of the cutting member 30 and the bottom guard 312 in the height direction is optionally 5-10 mm.

In this embodiment, the bottom guard 312 is positioned below the cutter 30 to create a protective barrier below the cutter 30. In use, the bottom guard 312 will come into contact with the grass to be cut, being a wear member. For intelligent lawn mower can cut smoothly in the use, this bottom protection 312 can be provided with a plurality of broach parts, is formed with between two adjacent broach parts and supplies the grass to leak into grass mouthful, it can be the bar gap to advance the grass mouth. The side guard 311 is disposed between the case 1 and the cutting member 30, and mainly serves to isolate the cutting member 30 from the case 1, thereby establishing a protective barrier at a side of the cutting member 30.

Considering the difference in function between the bottom shield 312 and the side shield 311 and the manufacturing process of the protective cover 31 integrated with the protective structure 310, the bottom shield 312 can be fixed at one end of the side shield 311 by means of a detachable connection. Specifically, the detachable connection mode may be a screw connection, and may also be other detachable connection modes, which is not specifically limited herein. The material selection of the bottom shield 312 and the side shield 311 may be different in consideration of the different functions of the bottom shield 312 and the side shield 311. The material hardness of the bottom protection 312 is greater than that of the side protection 311, and the material density of the side protection 311 is less than that of the bottom protection 312, so that the overall durability of the protection structure 310 is improved, and the reliability of the whole machine in use is improved. Specifically, the bottom protection 312 can be made of a wear-resistant metal material, and the side protection 311 can be made of a plastic material with a lighter density, so that the density of the protection cover 31 is reduced as much as possible, and the resistance of the cutting device 3 during floating is reduced.

The present description also provides a cutting device 3, the cutting device 3 comprising: a cutter 30 and a guard structure 310. The cutting member 30 can be driven to move. The guard structure 310 includes side guards 311 and a bottom guard 312. The side guards 311 are positioned on the sides of the cutting member 30 to create a protective barrier on the sides of the cutting member 30. The bottom guard 312 is positioned below the cutter 30 to create a protective barrier below the cutter 30. The guard structure 310 is stationary in height relative to the cutter 30; at least under the condition that the cutting device 3 is located at the lowest cutting position, the protective structure 310 can drive the cutting device 3 to move upwards when being subjected to external force from bottom to top.

Wherein, cutting device 3 is connected with the transmission of cutting motor 32, protective structure 310 still includes protection casing 31 and sets up the motor cylinder 33 outside cutting motor 32. The upper end of the protective cover 31 is connected with the motor barrel 33, the lower end of the protective cover 31 is used for connecting the side protection 311 near one side of the machine shell 1, the side protection 311 extends downwards from the protective cover 31 to the lower part of the cutting piece 30 and is fixed with the bottom protection 312; one end of the bottom guard 312 is fixed to the side guard 311, and the other end extends to the lower side of the cutting member 30; a debris evacuation passageway is formed between the guard structure 310 and its opposing cutting element 30.

In the present embodiment, please refer to the detailed description of the above embodiment of the intelligent lawn mower for the specific composition, structure, matching relationship and functions that can be realized by the cutting device 3, which will not be described herein again. It should be noted that the cutting device 3 can be used in other tools requiring passing and safety, besides the intelligent lawn mower.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.

The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (15)

1. An intelligent lawn mower, comprising: the casing for drive the removal subassembly that intelligent lawn mower removed, be used for the cutting operation provides the cutting motor of drive power, be used for carrying out the cutting device of cutting operation under the cutting motor drive, cutting device includes:

the cutting piece can move under the driving of the cutting motor;

a guard structure comprising a bottom guard positioned below the cutting element to create a protective barrier below the cutting element;

the protective structure is static relative to the cutting piece in the height direction;

and at least under the condition that the cutting device is lower than the machine shell, the protective structure can drive the cutting device to move upwards relative to the machine shell when being subjected to external force from bottom to top.

2. The intelligent mower of claim 1, wherein said cutting means is eccentrically disposed below said housing, offset to one side of said housing.

3. The intelligent mower of claim 2, wherein the distance from the cutting member to the outermost side of the housing is 20 mm to 30 mm.

4. The intelligent mower of claim 1, wherein the guard structure further comprises a side guard positioned to the side of the cutting member to create a protective barrier to the side of the cutting member.

5. The intelligent mower of claim 4 wherein said cutting member is height adjustable, and wherein said side guards and said bottom guard both lift and lower with said cutting member.

6. The intelligent mower of claim 5, wherein the lowermost ends of the side guards and bottom guard are lower than the bottom end of the housing at least when the cutter is at the lowest cutting height.

7. The intelligent mower of claim 1 further comprising a floating height adjustment mechanism for allowing said guard structure to move said cutting element upward when subjected to a bottom-up force.

8. The intelligent mower of claim 7, wherein the maximum height of said cutting member corresponding to said upward movement is between 50 mm and 55 mm.

9. The intelligent mower of claim 4 wherein guard structure further comprises a guard positioned above said cutting member and connected to said side guard.

10. The intelligent mower of claim 9 wherein said side guard extends downwardly from a side of said guard to below said cutting member and is connected to said bottom guard, said guard structure and said cutting member defining a debris passage therebetween.

11. The intelligent mower of claim 10, wherein said cutter comprises a cutter deck and cutting blades mounted on said cutter deck, said bottom guard being positioned below said cutting blades of said cutter, said bottom guard being spaced apart from said cutting blades by a distance in the height direction of between 5 mm and 10 mm; the horizontal distance from the edge of the cutting piece to the side protection is set between 5 mm and 10 mm.

12. The smart lawn mower of claim 1, wherein the bottom guard extends in a direction of travel of the smart lawn mower, the bottom guard having a length greater than a cutting diameter of the cutting device.

13. The intelligent mower of claim 1, wherein the bottom guard is provided with a grass inlet, and the grass inlet is a strip-shaped gap.

14. A cutting device, comprising:

a cutting member capable of being driven for movement;

a guard structure comprising a bottom guard positioned below the cutting element to create a protective barrier below the cutting element; the protective structure is static relative to the cutting piece in the height direction;

at least under the condition that the cutting device is located at the lowest cutting position, the protective structure can drive the cutting device to move upwards when being subjected to external force from bottom to top.

15. The cutting device of claim 14, wherein the guard structure further comprises a side guard positioned to the side of the cutting member to create a protective barrier to the side of the cutting member, the cutting device being drivingly connected to a cutting motor, the guard structure further comprising a shield and a motor cartridge disposed outside the cutting motor, an upper end of the shield being connected to the motor cartridge, a lower end of the shield being adapted to be connected to the side guard adjacent a side of the housing,

the side protection extends downwards from the protection cover to the position below the cutting piece and is fixed with the bottom protection; one end of the bottom guard is fixed with the side guard, and the other end of the bottom guard extends to the position below the cutting piece; a chip removal channel is formed between the protective structure and the cutting piece opposite to the protective structure.

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