WO2021180123A1

WO2021180123A1 - Cutting device and intelligent mower

Info

Publication number: WO2021180123A1
Application number: PCT/CN2021/079975
Authority: WO
Inventors: 李兴红
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2020-03-10
Filing date: 2021-03-10
Publication date: 2021-09-16
Also published as: WO2021179657A1

Abstract

Disclosed are a cutting device (3) and an intelligent mower. The intelligent mower comprises: a housing (1), a moving assembly (2) used for driving the intelligent mower to move, a cutting electric motor (32) for providing a driving force for a cutting operation, and the cutting device (3) for performing the cutting operation under the driving of the cutting electric motor (32); the cutting device (3) comprises: a cutting member (30), wherein the cutting member (30) can be driven by the cutting electric motor (32) to move; and a protection structure (310) comprising a bottom protection (312), wherein the bottom protection (312) is located below the cutting member (30) to establish a protection barrier below the cutting member (30); the protection structure (310) is static relative to the cutting member (30) in a height direction; and at least in the case of the cutting device (3) being lower than the housing (1), when the protection structure (310) is subjected to an external force from the bottom to the top, the cutting device (3) can be driven to move upwards relative to the housing (1). The intelligent mower has a high safety and a good trafficability, is particularly suitable for scenarios in which there is need to ensure edge cutting, and can better meet the comprehensive requirements of users.

Description

Cutting device and intelligent lawn mower

This application claims the priority of the Chinese patent applications whose application date is March 10, 2020, and the application numbers are 202010161007.7 and 202020284879.8, the entire contents of which are incorporated into this application by reference.

Technical field

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

Background technique

The intelligent lawn mower is an electric garden tool used for mowing lawns and vegetation. It has the functions of automatic walking, anti-collision, preventing the line from going out within the specified range, automatically returning to charging, safety detection and battery power detection. On the whole, the intelligent lawn mower can complete the work of mowing the lawn autonomously, without direct human control and operation, and has low power, low noise, and exquisite appearance.

The intelligent lawn mower mainly includes: a control unit, which is used to control its automatic walking and perform cutting work; a casing, a mobile component used to drive the intelligent lawn mower to move, and a cutting device used to perform cutting operations. The cutting device is generally arranged under the casing.

At present, for safety reasons, some smart lawn mowers set the cutting device at a position far away from the boundary of the fuselage, so that the operator will not touch the cutting element even if the operator extends his foot under the fuselage. However, when the cutting device is far from the boundary of the fuselage, it will cause the problem of not being able to cut edges. For example, when the cutting element encounters obstacles such as wall corners, fences, steps, etc., it will form a wider area that cannot be cut. These wide areas that cannot be cut by smart lawn mowers often require manual trimming, which is time-consuming and labor-intensive.

In order to solve the above problems, a more feasible way is to reduce the distance between the cutting device and the boundary, and install a protective mechanism on the casing. The protective mechanism can be used to establish a protective barrier to prevent human tissues from reaching under the body and causing injury. .

However, after the above-mentioned protective mechanism is installed on the casing, the height of the bottom end from the ground is a fixed value, which is likely to affect the passability of the smart lawn mower. For example, a smart lawn mower generally has multiple gears. In order to ensure that the intelligent lawn mower can play a safety protection role in all gears, the bottom end of the protection mechanism needs to isolate the knife at the lowest gear. At this time, it must have a lower height from the ground. Assuming that in order to ensure the passability of the intelligent lawn mower, when the intelligent lawn mower is at a lower gear, the bottom end of the protective mechanism is higher than the cutter head, that is, it cannot protect the cutter head, and the intelligent lawn mower will inevitably be lowered Security.

In summary, in view of the shortcomings of the existing technology, it is necessary to provide a new intelligent lawn mower, which can ensure cutting to the edge, and at the same time has stronger safety and better passability when used, and better meets the requirements Comprehensive needs of users.

Summary of the invention

In view of the shortcomings of the prior art, one purpose of this application is to provide a cutting device and an intelligent lawn mower, which have stronger safety and better passability, and are especially suitable for scenes that need to be able to ensure cutting to the edge, and can be more It satisfies the comprehensive needs of users well.

The above-mentioned objects of the present invention can be achieved by the following technical solutions:

An intelligent lawn mower, comprising: a housing, a moving component for driving the intelligent lawn mower to move; a cutting motor used to provide driving force for a cutting operation, and a cutting motor used to perform the cutting operation driven by the cutting motor Device, the cutting device includes: a cutting member, the cutting member can be driven by the cutting motor; a protection structure, including a bottom protection, the bottom protection is located below the cutting member, so that the cutting A protective barrier is established below the piece; the protective structure is stationary relative to the cutting piece in the height direction; at least when the cutting device is lower than the casing, the protective structure is subjected to a bottom-up external force , Which can drive the cutting device to move upward relative to the casing.

In a preferred embodiment, the cutting device is eccentrically arranged below the casing, which is biased to one side of the casing.

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 protection structure further includes a side protection, and the side protection is located on the side of the cutting member to establish a protective barrier on the side of the cutting member.

In a preferred embodiment, the position of the cutting member along the height direction is adjustable, and both the side guard and the bottom guard are raised and lowered following the cutting member.

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

In a preferred embodiment, the smart lawn mower further includes a floating height adjustment mechanism, which is used to allow the protective structure to drive the cutting member to move upward when the protective structure receives 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 protective structure further includes a protective cover which is arranged above the cutting member and is connected to the side protection.

In a preferred embodiment, the side protection extends downward from one side of the protection cover to below the cutting member, and is connected to the bottom protection, and forms between the protection structure and the cutting member Chip removal channel.

In a preferred embodiment, the cutting element includes a cutter head and a cutting blade installed on the cutter head, the bottom guard is located below the cutting blade of the cutting element, and the distance in the height direction is set at 5 The horizontal distance between the edge of the cutting piece and the side protection is set between 5 mm and 10 mm.

In a preferred embodiment, the bottom protection extends along the traveling direction of the smart lawn mower, and the length of the bottom protection is greater than the cutting diameter of the cutting device.

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

A cutting device includes: a cutting member, which can be driven to move; a protective structure, including a bottom shield, which is located below the cutting member to establish a protective barrier below the cutting member The protective structure is stationary relative to the cutting member in the height direction; at least when the cutting device is at the lowest cutting position, the protective structure can drive the cutting device upward when the protective structure is subjected to a bottom-up external force Activity.

In a preferred embodiment, the protection structure further includes a side protection, the side protection is located on the side of the cutting member to establish a protective barrier on the side of the cutting member, the cutting device and The cutting motor is connected in transmission, the protective structure further includes a protective cover and a motor barrel arranged outside the cutting motor, the upper end of the protective cover is connected with the motor barrel, and the lower end of the protective cover is used to be close to the casing One side of the side protection is connected to the side protection, the side protection extends downward from the protection cover to below the cutting piece and is fixed to the bottom protection; one end of the bottom protection is connected to the side protection The other end is fixed to the cutting member; a chip removal channel is formed between the protective structure and the cutting member opposite to the protective structure.

Beneficial effect

In the smart lawn mower provided in the embodiments of the present application, a protective structure is provided on the side and below the cutting member, and the protective structure and the cutting member are relatively static in the height direction, ensuring that at least the cutting device is lower than In the case of the casing, when the protective structure is subjected to a bottom-up external force, it can drive the cutting device to move upward relative to the casing, thereby ensuring that the lawn mower has stronger safety and better The passability is particularly suitable for use scenarios that need to be cut to the edge, and can better meet the comprehensive needs of users.

With reference to the following description and drawings, specific implementations of the present application are disclosed in detail, and the ways in which the principles of the present application can be adopted are indicated. It should be understood that the scope of the embodiments of the present application is not limited thereby.

Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some implementations of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

Figure 1 is a top view of an intelligent lawn mower provided by one embodiment of the application;

Figure 2 is a bottom view of the smart lawn mower in Figure 1;

Figure 3 is a front view of the smart lawn mower in Figure 1;

Figure 4 is the A-A cross-sectional view of the smart lawn mower in Figure 1 when it is in the lowest gear;

Figure 5 is the A-A cross-sectional view of the smart lawn mower in Figure 1 when it is at the highest gear;

Fig. 6 is a schematic structural diagram of a cutting device provided by an embodiment of the application.

Description of reference signs:

1. Chassis; 11, front end; 12, rear end; 13, first side; 14, second side; 15, top surface; 16, bottom surface;

2. Mobile components;

3. Cutting device; 30, cutting piece; 31, protective cover; 310, protective structure; 311, side protection; 312, bottom protection; 32, cutting motor; 33, motor barrel; 34, connecting sleeve; 35, base;

4. Floating height adjustment mechanism; 40. Gear adjustment parts;

F. The way forward;

L0, central axis;

L1, cut to the margin;

S. Cutting circle.

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or a central element may be present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only, and do not mean the only implementation.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terminology used in the specification of the application herein is only for the purpose of describing specific embodiments, and is not intended to limit the application. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The specification of this application provides a cutting device and an intelligent lawn mower. The intelligent lawn mower can not only ensure cutting to the edge, but also has stronger safety and better passability when used, which better meets the needs of users. need.

Please refer to the smart lawn mower shown in Figure 1, Figure 2 and Figure 3. The smart lawn mower usually includes: a control unit for controlling its automatic walking and performing cutting work, a casing 1, for driving smart cutting The moving assembly of the grass machine 2, the cutting motor 32 for providing driving force for the cutting operation, and the cutting device 3 for performing the cutting operation driven by the cutting motor 32. In addition, the smart lawn mower may also include a floating height adjustment mechanism 4 for adjusting the height of the cutting device 3 from the ground. Specifically, the floating height adjustment mechanism 4 may be a floating height adjustment mechanism 4 that only restricts the current lowest position of the cutting device 3 without restricting the upward movement of the cutting device 3.

Referring to FIGS. 4 to 6 in conjunction, the cutting device 3 may include: a cutting member 30 that can move under the drive of the cutting motor 32 and a protective structure 310 for establishing a protective barrier for the cutting member 30. The cutting member 30 Including the cutter head and the cutting blade installed on the cutter head.

The cutting member 30 can be driven by the cutting motor 32 to move. Specifically, the protection structure 310 may include a bottom protection 312. The bottom protection 312 is located below the cutting member 30 to establish a protective barrier below the cutting member 30. The protection structure 310 may further include: side protection 311. The side protection 311 is located on the side of the cutting member 30 to establish a protective barrier on the side of the cutting member 30.

Along the height direction, the protective structure 310 is stationary relative to the cutting member 30. At least when the cutting device 3 is lower than the casing 1, when the protective structure 310 receives a bottom-up external force, it can drive the entire cutting device 3 to lift up without being affected by the floating height adjustment mechanism 4 Limiting position, thereby ensuring that the intelligent lawn mower has stronger safety and better passability, and better meets the comprehensive needs of users.

Wherein, when the cutting device 3 is lower than the casing 1, that is, when the casing 1 is exposed downward, the obstacle crossing ability of the smart lawn mower mainly depends on the position of the cutting device 3. In order to prevent the cutting device 3 from encountering obstacles that affect the movement of the intelligent lawn mower when it is in a lower position, and the protective structure 310 moves up and down following the cutting member 30, a protective barrier can be established for the cutting member 30 at any height to prevent obstacles. The object directly contacts the cutting piece 30 to avoid loss and injury. This application uses a floating height adjustment mechanism 4 that allows the cutting device 3 to move upward under the action of an external force when the cutting device 3 has an upwardly movable space, so that the passability of the machine is improved.

In addition, when the cutting device 3 is not lower than the casing 1, there may also be scenarios where the cutting device 3 needs to be lifted upwards. Specifically, for example, when encountering a small animal that enters the bottom of the casing 1, the cutting device 3 can be lifted up by a floating height adjustment mechanism to prevent the cutting member 30 from directly contacting the small animal, thereby forming an effective protection for the small animal. Or, when the smart lawn mower is in a non-working state, since the cutting member 30 is relatively sharp, for the case where the cutting member 30 is relatively close to the casing 1, the user may touch the cutting member with his fingers during the process of carrying it by hand. 30. However, in the present application, a protective structure 310 is provided on the side of the cutting member 30 close to the casing 1, and when the protective structure 310 is subjected to external force, for example, when a finger touches the bottom protective 312, it can drive the entire cutting device 3 to rise upward. Therefore, the cutting member 30 is prevented from contacting the fingers, and the safety of the intelligent lawn mower is improved.

In this embodiment, the casing 1 is formed with a hollow cavity with a certain size for installing various parts of the smart lawn mower. In the forward direction F of the smart lawn mower, the casing 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, and the top surface 15 and bottom 16. As shown in FIG. 1, in the forward direction F, the first side 13 is the right side of the casing 1, and the second side 14 is the left side of the casing 1.

In this embodiment, based on the size of the casing 1, the cutting device 3 and the overall layout of the whole machine, the cutting device 3 is arranged eccentrically below the casing 1 and biased to one side of the casing 1. Specifically, along the advancing direction F of the smart lawn mower, the smart lawn mower has a central axis L0, and the center of the cutting member 30 is biased to one side of the central axis L0, for example, located in the center. The right side of the axis L0.

In this embodiment, the cutting member 30 can be driven by the cutting motor 32 to make a rotating movement, or it can make a reciprocating cutting movement, or it can be another form of movement that can realize mowing. Wherein, in the embodiment of the present application, the cutting member 30 is rotated as an example for expansion description, and other motion forms can be referred to the rotational motion, and the description of this application will not be repeated here.

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 deviates from the central axis L0 of the smart lawn mower. The distance from the edge of the cutting circle S formed when the cutting member 30 rotates to the casing 1 is within a predetermined range. The distance from the cutting circle S formed when the cutting member 30 rotates to the casing 1 (the first side 13 in the figure) is cut to the margin L1. By controlling the distance between the cutting piece 30 and the casing 1, the cutting device 3 is close enough to the outer side wall of the casing 1, so as to cut the grass at the boundary line or the edge of the obstacle, so as to cut to the edge and avoid the trouble of manual trimming. .

In this embodiment, comprehensively considering the space interference problem that the cutting member 30 of the cutting device 3 needs to overcome when rotating, a protective structure 310 is provided between the cutting member 30 and the casing 1, and the predetermined range is determined to be optional Between 20mm-30mm.

In this embodiment, the cutting member 30 may be in the form of a rotatable cutter head. The protective cover 31 may be arranged coaxially with the cutting member 30 and surrounding the cutting member 30. The cutting member 30 can be driven by the cutting motor 32 to rotate to form a central axis of rotation. The protective structure 310 is relatively stationary with the cutting member 30 along the height direction (that is, the extension direction of the rotation center axis), and can move in the height direction under the external force of the floating height adjustment mechanism from bottom to top.

Specifically, the protective structure 310 further includes a protective cover 31 and a motor barrel 33 arranged outside the cutting motor 32. The upper end of the protective cover 31 is connected to the motor barrel 33, and the lower end of the protective cover 31 The side guard 311 is connected to the side close to the casing 1. The protective cover 31 can be integrally formed with the side shield 311, and of course, the connection can also be realized by a fixed connection. The protective structure 310 and the cutting member 30 keep moving synchronously.

There are many ways for the protection structure 310 and the cutting member 30 to achieve relative static height in the height direction. Wherein, as shown in FIG. 3, the protective cover 31 and the motor barrel 33 can be fixed together by a fixed connection (for example, screws). The cutter head can be fixed on the connecting sleeve 34 by a fixed connection (for example, a screw). The connecting sleeve 34 is fixedly connected to the rotating shaft of the cutting motor 32 by means of fixed connection (for example, interference press fitting), and the cutting motor 32 is fixed to the motor barrel 33 by means of fixed connection (for example, screws), and finally realizes the cutting blade and protection. The relative positions of the structures 310 along the height direction are kept fixed. It should be noted that the above-mentioned fixed connection method is not limited to the above-mentioned examples, and other methods that can realize the fixed connection can also be used here.

As shown in Figures 4 and 5, in one embodiment, the smart lawn mower is provided with multiple gears, including: the highest gear and the lowest gear. The floating height adjustment mechanism 4 includes a gear position adjustment member 40, which is used to adjust the gear position and change the height of the cutting member 30 from the ground, at least when the intelligent lawn mower is in the lowest gear. , The lowermost end of the cutting device 3 is lower than the bottom end of the casing 1.

In this embodiment, the gear position of the smart lawn mower refers to the distance of the cutting blade of the cutting member 30 from the ground. This distance characterizes how high the grass will be cut when the machine is running. Specifically, the gear indications are 20 (mm), 30 (mm), 40 (mm), 50 (mm), 60 (mm), and each gear corresponds to a cutting height. Alternatively, the gear indication can be represented by numbers such as 1, 2, 3, 4, and 5, and each value corresponds to a cutting height. Of course, the gear indication is not limited to numerical values, and can also be other characters, such as English letters, Roman letters and so on, the specific application is not specifically limited here. As shown in FIG. 4, when the smart lawn mower is at the lowest gear, the distance H1 between the tip of the cutting member 30 and the ground may be 20 mm. As shown in Fig. 5, when the smart lawn mower is at the highest level, the distance H2 of the blade tip of the cutting member 30 from the ground may be 60 mm.

In this embodiment, the floating height adjustment mechanism 4 is used to limit only the current lowest position of the cutting device 3. Specifically, the floating height adjustment mechanism 4 can be used to adjust the gears and determine the current height of the cutting member 30 from the ground, without restricting the cutting device 3 from moving upward when it receives a bottom-up external force.

Specifically, the floating height adjustment mechanism 4 may be provided with a height adjustment structure and a gear adjustment member 40. Wherein, the gear adjusting member 40 may be in the form of a knob. By turning the knob to different gears, the height adjustment structure is driven to realize the change of the height of the cutting device 3 from the ground. Specifically, the height-adjustment structure may be a multi-link structure, or a spring structure, or other forms for realizing floating height-adjustment, which is not specifically limited in this application.

For example, the multi-link structure may be a four-link structure, in which the movement of the link can drive the motor barrel 33 to move up and down, so as to realize the height adjustment of the motor barrel 33 and the cutting device 3. This height-adjusting structure can limit the lowest point of the motor barrel 33 from the working surface at the current cutting height, that is, determine the distance between the cutting blade of the cutting member 30 and the ground. The upward movement range is determined by the distance between the base 35 and the motor barrel 33. What is the distance between the base 35 and the motor barrel 33, the motor barrel 33 can float upward for as much distance.

It should be noted that as long as the motor barrel 33 has a sufficient floating distance from the base 35, the cutting device 3 can be driven by the floating height adjustment mechanism 4 when it encounters obstacles in all gears. Floating, so as to achieve obstacle crossing. However, in order not to make the overall height of the smart lawn mower too high, and at the same time when the smart lawn mower is at the highest level, the height of the cutting piece 30 from the ground is already large enough to basically not affect the obstacle crossing, so It can be set that when the smart lawn mower is at the highest gear, the top end of the motor barrel 33 abuts the base 35 and can no longer float. That is to say, when the smart lawn mower is not at the highest level, the cutting device 3 can move upward under the driving of the floating height adjustment mechanism 4 when the protective structure 310 contacts an external obstacle.

Generally, in order to ensure the smooth running of the smart lawn mower, the lowermost end of the casing 1 is also set to a certain distance from the ground, for example, it may be about 40 mm. When the smart lawn mower is at the lowest position, the cutting member 30 is at the lowest point, for example, the height from the ground is 20 mm, and the cutting device 3 must expose the casing 1 at this time. In order to ensure that when the intelligent lawn mower is at the lowest gear, the cutting device 3 can also enter the casing 1 completely under the drive of the floating height adjustment mechanism 4. In the height direction, the lowest point of the cutting member 30 The maximum height movable upward relative to the lowest point of the front end 11 of the casing 1 may be between 50 mm and 55 mm.

Please refer to FIG. 6 in conjunction with FIG. 6, in one embodiment, the protection structure 310 may include a side protection 311 and a bottom protection 312. The side protection 311 extends downward from the protection cover 31 to below the cutting member 30 and is fixed to the bottom protection 312; one end of the bottom protection 312 is fixed to the side protection 311, and the other One end extends below the cutting member 30; a chip removal channel is formed between the protective structure 310 and the cutting member 30 opposite to it.

In this embodiment, the side guard 311 and the bottom guard 312 are along the advancing direction F of the smart lawn mower, and may be parallel to the casing 1 as a whole. In the cross-sectional view in FIG. 6, the side guard 311 may have a first extending direction. The bottom protection 312 has a second extending direction. The first extension direction is substantially perpendicular to the second extension direction.

Wherein, the first extension direction may be parallel or substantially parallel to the direction of gravity. The second extension direction may be parallel or substantially parallel to the horizontal direction. When the bottom protection 312 and the side protection 311 are substantially parallel, an effective gap can be formed between the protection structure 310 and the cutting member 30 in the most space-saving manner. The gap is used to form the chip removal channel. During the working process of the intelligent lawn mower, the broken grass, soil, broken branches and other wastes that are rotated and cut by the cutting member 30 can be discharged along the chip removal channel to prevent it from getting stuck on the cutting member 30 and affect the normal operation of the intelligent lawn mower. run.

Specifically, in order to ensure the smooth chip removal of the smart lawn mower without affecting the cutting of the smart lawn mower to the edge, the distance between the edge of the cutting member 30 and the side guard 311 may be between 5 mm and 10 mm. between. In addition, in order to ensure the smooth chip removal of the intelligent lawn mower, while reasonably controlling the height of the intelligent lawn 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 Between 5mm-10mm.

In this embodiment, the bottom shield 312 is located below the cutting member 30 to establish a protective barrier below the cutting member 30. When in use, the bottom guard 312 will come into contact with the grass to be cut, which is a wear part. In order for the smart lawn mower to cut smoothly during use, the bottom guard 312 may be provided with a plurality of comb-tooth parts, and a grass inlet for grass to pass is formed between two adjacent comb-tooth parts. The grass mouth can be a strip-shaped gap. The side protection 311 is arranged between the casing 1 and the cutting member 30 and is mainly used to isolate the cutting member 30 and the casing 1 so as to establish a protective barrier on the side of the cutting member 30.

Considering the difference between the functions of the bottom protection 312 and the side protection 311, and the overall production process of the protection cover 31 and the protection structure 310, the bottom protection 312 can be fixed to one end of the side protection 311 by a detachable connection. Specifically, the detachable connection method may be a screw connection, of course, it may also be other detachable connection methods, which is not specifically limited in this application. Considering the different functions of the bottom protection 312 and the side protection 311, the materials of the bottom protection 312 and the side protection 311 may be different. The material hardness of the bottom protection 312 is greater than the material hardness of the side protection 311, and the material density of the side protection 311 is less than the material density of the bottom protection 312, so as to improve the overall durability of the protection structure 310 at the same time Provide the reliability of the whole machine in use. Specifically, the bottom guard 312 can be made of wear-resistant metal material, and the side guard 311 can be made of lighter-density plastic material, so as to reduce the density of the guard 31 as much as possible and reduce the time when the cutting device 3 floats. Resistance.

This specification also provides a cutting device 3 which includes a cutting member 30 and a protective structure 310. The cutting member 30 can be driven to move. The protection structure 310 includes a side protection 311 and a bottom protection 312. The side protection 311 is located on the side of the cutting member 30 to establish a protective barrier on the side of the cutting member 30. The bottom protection 312 is located below the cutting member 30 to establish a protective barrier below the cutting member 30. The protective structure 310 is stationary relative to the cutting member 30 in the height direction; at least when the cutting device 3 is at the lowest cutting position, when the protective structure 310 is subjected to a bottom-up external force, it can drive the The cutting device 3 moves upward.

Wherein, the cutting device 3 is in transmission connection with the cutting motor 32, and the protective structure 310 further includes a protective cover 31 and a motor barrel 33 arranged outside the cutting motor 32. The upper end of the protective cover 31 is connected to the motor barrel 33, and the lower end of the protective cover 31 is used to connect the side protection 311 to the side close to the casing 1. The side protection 311 is self-protected The cover 31 extends downwards below the cutting member 30 and is 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 below the cutting member 30 A chip removal channel is formed between the protective structure 310 and its opposite cutting member 30.;

In this embodiment, for the specific composition, structure, coordination relationship, and functions that can be realized of the cutting device 3, please refer to the specific description of the above-mentioned smart lawn mower embodiment, which will not be repeated in this application. It should be noted that, in addition to being used in smart lawn mowers, the cutting device 3 can also be used in other tools that need to ensure passability and safety.

It should be noted that in the description of this application, the terms "first" and "second" are only used to describe the purpose and distinguish similar objects. Imply relative importance. In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more.

The foregoing various embodiments in this specification are all described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

The above are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as described above, the content is only used to facilitate the understanding of the present invention, and is not intended to limit the present invention. Any person skilled in the technical field of the present invention can make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention. However, the patent protection scope of the present invention is as follows: Still subject to the scope defined by the appended claims.

Claims

An intelligent lawn mower, characterized by comprising: a housing, a moving component for driving the intelligent lawn mower to move, a cutting motor used to provide driving force for a cutting operation, and a cutting motor used to execute under the driving of the cutting motor A cutting device for cutting operation, the cutting device includes:

A cutting piece, the cutting piece can move under the drive of the cutting motor;

The protective structure includes a bottom protection, the bottom protection is located below the cutting piece, so as to establish a protective barrier below the cutting piece;

The protective structure is stationary relative to the cutting member in the height direction;

At least when the cutting device is lower than the casing, the protective structure can drive the cutting device to move upward relative to the casing when the protective structure is subjected to a bottom-up external force.
The smart lawn mower according to claim 1, wherein the cutting device is eccentrically arranged under the casing, and is biased to one side of the casing.
The intelligent lawn mower according to claim 2, wherein the distance from the cutting member to the outermost side of the casing is 20 mm to 30 mm.
The smart lawn mower of claim 1, wherein the protective structure further comprises a side protection, and the side protection is located on the side of the cutting member to establish a side of the cutting member. Protective barrier.
The smart lawn mower according to claim 4, wherein the position of the cutting member along the height direction is adjustable, and the side guard and the bottom guard are both raised and lowered following the cutting member.
The smart lawn mower of claim 5, wherein at least when the cutting member is at the lowest cutting height, the lowermost ends of the side protection and the bottom protection are lower than the bottom end of the casing.
The intelligent lawn mower of claim 1, further comprising a floating height adjustment mechanism for allowing the protective structure to drive the cutting member to move upward when the protective structure is subjected to a bottom-up external force.
The intelligent lawn mower of claim 7, wherein the maximum height of the cutting member corresponding to the upward movement is between 50 mm and 55 mm.
The smart lawn mower according to claim 4, wherein the protective structure further comprises a protective cover, the protective cover is arranged above the cutting member and connected with the side protection.
The smart lawn mower according to claim 9, wherein the side protection extends downward from one side of the protection cover to below the cutting member, and is connected to the bottom protection, and the protection structure A chip removal channel is formed between the cutting part.
The smart lawn mower of claim 10, wherein the cutting member includes a cutter head and a cutting blade installed on the cutter head, and the bottom guard is located below the cutting blade of the cutting member, The distance in the height direction is set between 5 millimeters and 10 millimeters; the horizontal distance between the edge of the cutting piece and the side guard is set between 5 millimeters and 10 millimeters.
The smart lawn mower according to claim 1, wherein the bottom protection extends along the traveling direction of the smart lawn mower, and the length of the bottom protection is greater than the cutting diameter of the cutting device.
The intelligent lawn mower according to claim 1, wherein the bottom protection is provided with a grass inlet, and the grass inlet is a strip-shaped gap.
A cutting device, characterized in that it comprises:

A cutting piece, which can be driven to move;

A protection structure, including a bottom protection, the bottom protection is located below the cutting piece to establish a protection barrier below the cutting piece; the protection structure is stationary relative to the cutting piece in the height direction;

At least when the cutting device is at the lowest cutting position, the protective structure can drive the cutting device to move upward when the protective structure is subjected to a bottom-up external force.
The cutting device according to claim 14, wherein the protection structure further comprises a side protection, the side protection is located on the side of the cutting member to establish a protective barrier on the side of the cutting member The cutting device is in transmission connection with the cutting motor, the protective structure further includes a protective cover and a motor barrel arranged outside the cutting motor, the upper end of the protective cover is connected with the motor barrel, and the protective cover The lower end is used to connect the side protection on the side close to the casing,

The side protection extends downward from the protection cover to below the cutting member and is fixed to the bottom protection; one end of the bottom protection is fixed to the side protection, and the other end extends to the cutting Below the piece; a chip removal channel is formed between the protective structure and the opposite cutting piece.