CN218302269U

CN218302269U - Protection device and lawn mower

Info

Publication number: CN218302269U
Application number: CN202222023500.XU
Authority: CN
Inventors: 王大炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2023-01-17
Anticipated expiration: 2032-08-02
Also published as: WO2024027586A1

Abstract

A protection device and a mower. The protection device comprises a cutter protection cover which is configured to cover a cutter of the mower; the cutter protective cover comprises a grass inlet surface, a grass outlet surface and a connecting surface for connecting the grass inlet surface and the grass outlet surface; the grass inlet surface comprises a plurality of first strip-shaped grids which are arranged in parallel, the grass outlet surface comprises a grass outlet, the connecting surface comprises a plurality of second strip-shaped grids which are arranged in parallel, and at least parts of the second strip-shaped grids are correspondingly connected with at least parts of the first strip-shaped grids. This cutter protection casing can provide effectual guard action to the cutter of lawn mower, avoids the lawn mower because of the cutter exposes the potential safety hazard that causes, can also avoid the cutter to produce bad problems such as loss of a knife, card die, winding simultaneously, improves the life of cutter.

Description

Protection device and lawn mower

Technical Field

Embodiments of the present disclosure relate to a guard and a lawn mower.

Background

The lawn mower adopted for landscaping gradually develops towards the direction of automatic control so as to reduce the labor cost. At present, the cutter of the mower on the market is often exposed outside, for example, exposed at the bottom of the mower, and in the moving process of the mower, if people, animals and other obstacles are encountered, the cutter cannot be effectively stopped, so that serious potential safety hazards exist; on the other hand, the cutter itself is also easy to be jammed, wound, collided and the like, which affects the normal use and the service life of the cutter.

SUMMERY OF THE UTILITY MODEL

At least one embodiment of the present disclosure provides a protection device and a lawn mower, and the protection device can effectively protect a cutter, so as to reduce or even eliminate potential safety hazards, and improve the service life of the cutter.

At least one embodiment of the present disclosure provides a guard for a lawn mower, the guard including a blade guard configured to be capable of covering a blade of the lawn mower; the cutter protective cover comprises a grass inlet surface, a grass outlet surface and a connecting surface for connecting the grass inlet surface and the grass outlet surface; the grass inlet surface comprises a plurality of first strip-shaped grids which are arranged in parallel, the grass outlet surface comprises a grass outlet, the connecting surface comprises a plurality of second strip-shaped grids which are arranged in parallel, and at least parts of the second strip-shaped grids are correspondingly connected with at least parts of the first strip-shaped grids.

For example, in a protective device provided in at least one embodiment of the present disclosure, at least a portion of the first strip-shaped grids is arc-shaped; or the plurality of first bar-shaped grids are linear, and at least parts of the plurality of first bar-shaped grids are respectively at an angle A with at least parts of the plurality of second bar-shaped grids, and the angle A is more than or equal to 180 degrees and more than or equal to 90 degrees.

For example, at least one embodiment of the present disclosure provides a protection device further including: the grass combing rolling brush is arranged in the cutter protective cover and is close to the grass entering surface and comprises a plurality of comb teeth.

For example, at least one embodiment of the present disclosure provides the protective device, wherein the grass roller further comprises a roller, the plurality of comb teeth are configured to rotate around the roller, and the roller is parallel to the grass feeding surface

For example, in the guard device provided by at least one embodiment of the present disclosure, the plurality of comb teeth are respectively configured to comb grass between adjacent first bar-shaped gratings.

For example, in the protection device provided by at least one embodiment of the present disclosure, the grass discharging surface includes a plurality of third bar-shaped grids arranged in parallel with each other, at least parts of the third bar-shaped grids are correspondingly connected with at least parts of the second bar-shaped grids, and a gap between adjacent third bar-shaped grids in the third bar-shaped grids constitutes the grass discharging port.

For example, in the protection device provided in at least one embodiment of the present disclosure, the number of the plurality of third strip gates is smaller than the number of the plurality of second strip gates.

At least one embodiment of the present disclosure further provides a lawn mower, which includes a cutter and the protection device provided by the embodiment of the present disclosure, wherein a cutter protection cover of the protection device is covered on the cutter.

For example, at least one embodiment of the present disclosure provides a lawn mower further comprising: the chassis is arranged at the bottom of the mower, the cutter is arranged on the chassis or is exposed by the chassis, and the protective device is arranged on the chassis.

For example, at least one embodiment of the present disclosure provides a lawn mower in which the guard is detachably mounted to the chassis.

For example, at least one embodiment of the present disclosure provides a lawn mower in which the cutter and the guard are disposed at a front or middle portion of the chassis.

For example, at least one embodiment of the present disclosure provides a lawn mower in which the cutter includes at least two layers of blades arranged in a stacked manner and a driving mechanism for driving the at least two layers of blades, and the driving mechanism is configured to drive the at least two layers of blades to perform relative movement so as to cut grass.

For example, at least one embodiment of the present disclosure provides a lawn mower further comprising: a collision detection mechanism configured to determine whether a collision occurs by detecting a displacement of the guard, the cutter, or the driving mechanism or detecting a current of the driving mechanism.

For example, at least one embodiment of the present disclosure provides a lawn mower further comprising: and the lifting driving mechanism is at least connected with the cutter and is configured to drive the cutter to lift.

For example, at least one embodiment of the present disclosure provides a lawn mower further comprising: and the lifting detection mechanism is configured to detect the lifting distance of the cutter.

For example, at least one embodiment of the present disclosure provides a lawn mower further comprising: and the controller is in communication connection with the collision detection mechanism and the lifting driving mechanism and is configured to control the lifting driving mechanism to drive the cutter to ascend under the condition that the collision detection mechanism detects the collision.

The protection device provided by the embodiment of the disclosure can be covered on the cutter to form a hidden cutter, so that an effective protection effect can be provided for the cutter, safety events caused by exposure of the cutter are avoided, and adverse problems of cutter damage, jamming, winding and the like can be avoided.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a schematic structural view of a protective device according to at least one embodiment of the present disclosure;

fig. 2 is another schematic structural view of a protective device according to at least one embodiment of the present disclosure;

fig. 3A is a side schematic view of a protective device provided in accordance with at least one embodiment of the present disclosure;

fig. 3B is a schematic structural view of a grass surface of a protective device according to at least one embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a lawn mower according to at least one embodiment of the present disclosure;

fig. 5 is another schematic structural view of a lawn mower according to at least one embodiment of the present disclosure;

6-8 are schematic structural views of another mower provided in at least one embodiment of the present disclosure; and

fig. 9-10 are schematic structural views of a guard of another lawn mower according to at least one embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

As mentioned above, the cutting tools of the current commercial lawn mowers are often exposed to the outside, and therefore, there is a serious safety hazard and the normal use and the working life of the cutting tools are affected.

At least one embodiment of the present disclosure provides a guard for a lawn mower, the guard including a cutter guard configured to cover a cutter of the lawn mower; the cutter protective cover comprises a grass inlet surface, a grass outlet surface and a connecting surface for connecting the grass inlet surface and the grass outlet surface; the grass inlet surface comprises a plurality of first strip-shaped grids which are arranged in parallel, the grass outlet surface comprises a grass outlet, the connecting surface comprises a plurality of second strip-shaped grids which are arranged in parallel, and at least parts of the second strip-shaped grids are correspondingly connected with at least parts of the first strip-shaped grids.

At least one embodiment of the present disclosure provides a lawn mower, which includes a cutter and the above-mentioned protection device, and the protection device covers the cutter.

The protection device provided by the embodiment of the disclosure can be covered on the cutter to form a hidden cutter, so that an effective protection effect can be provided for the cutter, safety events caused by exposure of the cutter are avoided, meanwhile, the cutter can be prevented from generating undesirable problems such as cutter damage, blockage, winding and the like, and the service life of the cutter is prolonged.

The guard and mower provided by the embodiments of the present disclosure are described below with reference to several specific embodiments.

At least one embodiment of the present disclosure provides a protection device for a lawn mower, which is schematically illustrated in fig. 1 and 2 at different viewing angles when the protection device is mounted on the lawn mower, and as shown in fig. 1 and 2, the protection device includes a cutter guard 10, and the cutter guard 10 is configured to cover a cutter 30 of the lawn mower to provide effective protection for the cutter 30.

As shown in fig. 1 and 2, the cutter guard 10 includes a grass-entering face 11, a grass-discharging face 12, and a connecting face (e.g., a bottom face) 13 connecting the grass-entering face 11 and the grass-discharging face 12.

For example, the grass-entering surface 11 is the surface which is firstly contacted with grass during the traveling process of the mower, and as shown in fig. 1 and 2, the grass-entering surface 11 comprises a plurality of first bar-shaped grids 111 which are arranged in parallel with each other. For example, the first plurality of linear gratings 111 may extend in the same direction as the moving direction of the lawn mower, so as to correspond to the extending direction of the grass, so that when the grass entering surface 11 contacts with the grass, the grass may enter the gaps between the first plurality of linear gratings 111 along the first plurality of linear gratings 111, so that the first plurality of linear gratings 111 may comb and guide the grass to facilitate the grass to travel to the cutter 30.

For example, the grass discharge surface 12 includes grass discharge openings (described in detail later) for discharging grass cut by the cutter 30.

For example, the connection surface 13 includes a plurality of second bar-shaped gates 131 arranged in parallel with each other, and at least a portion of the plurality of second bar-shaped gates 131 is correspondingly connected with at least a portion of the plurality of first bar-shaped gates 111, for example, one-to-one and connected.

For example, in the embodiment of fig. 1 and 2, the number of the first bar-shaped grids 111 is the same as that of the second bar-shaped grids 131, the second bar-shaped grids 131 are in one-to-one correspondence with and connected to the first bar-shaped grids 111, for example, the second bar-shaped grids 131 are in one-to-one correspondence with and integrally connected to the first bar-shaped grids 111, so that the grass entering along the gaps of the first bar-shaped grids 111 can continue to advance along the gaps of the second bar-shaped grids 131 and then reach the cutter 30.

For example, in other embodiments, the number of the first plurality of bar grids 111 and the number of the second plurality of bar grids 131 may be different, so that the first plurality of bar grids 111 and the second plurality of bar grids 131 may realize different degrees of combing and guiding at different positions.

For example, in some embodiments, as shown in fig. 1 and 2, at least a portion of the first plurality of bar-shaped grills 111 entering the grass surface 11 is arc-shaped, for example, at least a portion connected to the connecting surface 13 is arc-shaped, in which case, the first plurality of bar-shaped grills 111 and the second plurality of bar-shaped grills 131 may be arc-connected, thereby facilitating grass entering, climbing and obstacle avoidance by using the protection device.

For example, in other embodiments, as shown in fig. 3A, the first bar-shaped grids 111 of the grass inlet surface 11 may also be linear and form an angle a with the second bar-shaped grids 131, for example, the angle a may range from 180 ° ≧ a > 90 °, and at this time, the connection manner between the grass inlet surface 11 and the connection surface 13 is similar to the connection manner between the grass outlet surface 12 and the connection surface 13 in fig. 1 and 2. For example, in some examples, the obtuse angle formed by the plurality of first bar-shaped gratings 111 and the plurality of second bar-shaped gratings 131 at this time is greater than 100 degrees, for example, greater than the obtuse angle formed by the grass-emitting surface 12 and the connecting surface 13, which is also beneficial for grass entering, climbing and obstacle avoidance of the protection device. For example, when the plurality of first bar-shaped grids 111 are 180 ° from the plurality of second bar-shaped grids 131, respectively, the guard has a triangular shape when viewed from the side.

For example, in some embodiments, as shown in fig. 1 and 2, the guard may further comprise a grass rolling brush 20, the grass rolling brush 20 being arranged inside the cutter guard 10, adjacent to the grass-entering face 11, and comprising a plurality of comb teeth 22. For example, the plurality of comb teeth 22 extend toward gaps between the adjacent first bar-shaped grids 111, respectively, to enable grass combing between the adjacent first bar-shaped grids 111. For example, a plurality of comb teeth 22 may extend from the gap between adjacent first bar-shaped grates 111 to beyond the grass surface 11 (as shown in fig. 1), whereby the grass rolling brush 20 may achieve grass combing over a wide range.

For example, in other embodiments, the plurality of comb teeth 22 may extend to just inside the grass-entering surface 11, or extend inside the grass-entering surface 11, which is not particularly limited by the embodiments of the present disclosure.

For example, in some embodiments, the plurality of comb teeth 22 may also comb grass between adjacent second bar-shaped grids 131. For example, the plurality of comb teeth 22 may also extend from the gaps between adjacent second bar-shaped gratings 131 to beyond the connection surface, or to just to the connection surface.

For example, as shown in fig. 1 and 2, the grass roller brush 20 further includes a roller 21, a plurality of comb teeth 22 having one end connected to the roller 21 (e.g., directly connected to the roller 21 or wound around the roller 21 via the roller), and the plurality of comb teeth 22 configured to be rotatable around the roller 21. For example, the grass brush 20 may further include a driving electrode for driving the roller or drum to rotate, so that the plurality of comb teeth 22 can rotate in a certain direction and at a certain speed.

For example, the plurality of comb teeth 22 are arranged in a plurality of rows (six rows are shown as an example), the plurality of rows of comb teeth 22 sequentially reach the grass inlet surface 11 when rotating to comb grass between the adjacent first bar-shaped fences 111, and the plurality of comb teeth 22 can comb the fallen grass along the ground for the rear cutter 30 to trim.

For example, the roller 21 is arranged parallel to the grass-entering surface 11 such that the plurality of comb teeth 22 located in the same row are substantially the same distance from the grass-entering surface 11. For example, the roller 21 may be driven to rotate clockwise or counterclockwise in the direction shown in fig. 1 and 2 in order to comb up the fallen grass.

For example, the combing roller 20 can be fixedly connected with the cutter guard 10 or also with the chassis 40 of the mower (described in detail later) when mounted, as long as the relative position of the combing roller 20 and the cutter guard 10 can be maintained.

For example, in some embodiments, the grass discharging surface 12 includes a plurality of third bar grids 121 arranged side by side, at least part of the third bar grids 121 is correspondingly connected with at least part of the second bar grids 131, for example, one-to-one correspondence and connection, and the gaps between the adjacent third bar grids 121 in the third bar grids 121 form the grass discharging openings to allow the cut grass to be discharged.

For example, in the embodiment of fig. 1 and 2, the number of the third bars 121 is the same as that of the second bars 131, the second bars 131 are in one-to-one correspondence with and connected to the third bars 121, for example, the second bars 131 are in one-to-one correspondence with and integrally connected to the third bars 121, so that the grass cut by the cutter can be discharged along the gaps of the third bars 121.

For example, in other embodiments, the number of the plurality of third bar gates 121 may be smaller than the number of the plurality of second bar gates 131, so that the gap formed between the adjacent third bar gates 121 is larger to facilitate the discharge of the cut grass.

For example, in some embodiments, as shown in fig. 3B, the grass discharging surface 12 may include only two third bar grids 121 (or only a few third bar grids 121), so as to form a larger area of the grass discharging opening 122, and since the stacking forms of the cut grass are various, the larger area of the grass discharging opening 122 is beneficial to discharging the cut grass smoothly, so as to prevent the grass from being stacked on the grass discharging surface 12 and causing the blockage of the guard.

For example, in some embodiments, as shown in fig. 1 and 2, the two sides of the cutter guard 10 may be hollowed out, thereby also facilitating the removal of the cut grass from the two sides; alternatively, in other embodiments, a number of bars may be provided on both sides of the tool guard 10 to provide further protection to the tool 30 on both sides.

For example, in some embodiments, the tool protection cover 10 may be made of a metal material or an alloy material, such as aluminum or an aluminum alloy, stainless steel, etc., so as to have high strength and corrosion resistance; the roller 21 and the comb teeth of the grass brush 20 may be made of metal or alloy material, such as aluminum or aluminum alloy, stainless steel, etc., so as to have high strength and prevent deformation due to pressure of heavy grass.

At least one embodiment of the present disclosure further provides a lawn mower, and fig. 4 and 5 respectively show the structure of the lawn mower at different viewing angles, and as shown in fig. 4 and 5, the lawn mower includes a cutter 30 and a guard provided by the embodiment of the present disclosure, and a cutter guard 10 of the guard is covered on the cutter 30 to provide effective protection for the cutter 30.

For example, in some embodiments, as shown in fig. 4 and 5, the mower further comprises a chassis 40, the chassis 40 being disposed at the bottom of the mower, the cutter 30 being disposed on the chassis 40 or exposed by the chassis 40; for example, the chassis 40 has an opening from which the cutter 30 can be extended or retracted. For example, the protection device may be mounted on the chassis 40, for example, detachably mounted on the chassis 40, and for example, fixed to the chassis 40 by a clamping structure, a bolt connector, and the like, so as to achieve operations of quick detachment, quick installation, and the like, and facilitate use; alternatively, the guard may be mounted to the chassis 40 by a sliding connection or other form of relative movement, so as to be movable relative to the chassis 40, such as for example, to raise and lower relative to the chassis 40.

For example, in some embodiments, the blade 30 and guard may be disposed in a front or middle portion of the chassis 40. For example, the embodiment of fig. 4 and 5 shows the knife 30 and guard disposed in the middle of the chassis 40.

For example, as shown in fig. 4 and 5, the lawn mower further includes a moving mechanism including front wheels 51 (two front wheels 51 are shown) and rear wheels 52 (two rear wheels 52 are shown), and the cutter 30 and the guard are disposed between the front wheels 51 and the rear wheels 52. For example, the motion mechanism shown in fig. 4 and 5 is a wheel-type motion mechanism, in other embodiments, the motion mechanism may also be other types of motion mechanisms such as a track motion mechanism, and the embodiments of the present disclosure are not limited in this respect.

For example, fig. 6-8 show schematic structural views of another lawn mower of at least one embodiment of the present disclosure. In other embodiments, as shown in fig. 6-8, the cutter 30 and the guard may be disposed at the front of the chassis 40, that is, the cutter 30 and the guard are disposed at a side of the front wheel 51 far from the rear wheel 52, that is, in front of the traveling direction of the mower, so that the cutter 30 can be in sufficient contact with grass while the mower travels, thereby achieving a mowing function.

For example, fig. 9 and 10 show structural views of the cutter 30 and the guard in a case where the cutter 30 and the guard are disposed at the front of the chassis 40. Referring to fig. 1-2 and 9 and 10, for example, in some embodiments, the cutter 30 may be a bar cutter, and the width of the bar cutter may be substantially equal to the width of the cutter guard 10, so that the cutter 30 may cut grass in a wide range, thereby improving grass cutting efficiency.

For example, in some embodiments, referring to fig. 1-2 and 9 and 10, the knife 30 includes at least two layers of blades (two layers of

blades

31 and 32 are shown as an example) arranged in a stack and a drive mechanism 33 that drives the at least two layers of

blades

31 and 32. For example, the drive mechanism 33 is configured to drive the at least two layers of

blades

31 and 32 into relative motion to effect mowing. For example, the driving mechanism 33 may be implemented as a driving device such as a motor.

For example, the upper blade 31 and the lower blade 32 respectively include a plurality of teeth, and the driving mechanism 33 drives the upper blade 31 to move leftward and the lower blade 32 to move rightward, or drives the upper blade 31 to move rightward and the lower blade 32 to move leftward, so that the teeth of the upper blade 31 and the lower blade 32 cooperate with each other to perform a scissor-like trimming action, thereby cutting grass.

For example, in other embodiments, the tool 30 may also be a disc-type tool or other types of tools, and the embodiments of the present disclosure are not limited thereto.

For example, in some embodiments, to further improve the safety of the lawn mower, the lawn mower may further comprise a collision detection mechanism 60, and the collision detection mechanism 60 may be configured to determine whether a collision occurs by detecting a displacement or deformation of the guard (e.g., the cutter guard 10 and/or the grass brush 20 of the guard), the cutter 30, or the driving mechanism 33, or detecting a current or voltage of the driving mechanism 33.

For example, in some embodiments, the collision detection mechanism 60 may employ various devices capable of detecting displacement or deformation, such as a distance sensor, a mechanical switch, a photoelectric infrared pair tube, a hall sensor, and the like, so that whether a collision occurs may be determined by detecting whether the displacement occurs in the above devices; alternatively, the collision detection means 60 may employ a current/voltage detection device to detect whether the current or voltage of the drive mechanism 33 is excessive, thereby determining whether the lock rotation of the drive mechanism 33 occurs, and further determining whether the collision occurs.

For example, in some embodiments, the lawn mower may further include a lift drive mechanism 34, such as a lift motor, the lift drive mechanism 34 coupled to at least the cutter 30 and configured to drive the cutter 30 to move up and down. Thereby, the driving cutter 30 can cut grass at different heights. For example, the cutter 30 may be raised up above the chassis 40 to be completely hidden inside the mower and lowered down to substantially the same height as the ground to cut grass substantially along the ground.

For example, in some embodiments, the driving mechanism 33 and the lifting driving mechanism 34 may be integrated into a single driving device that can simultaneously drive the cutting tool 30 for both the cutting action and the lifting action. Alternatively, in other embodiments, the driving mechanism 33 and the lifting driving mechanism 34 may be two independent driving devices, which is not limited in this embodiment of the disclosure.

For example, in some embodiments, the lawn mower may further include a lift detection mechanism 35, the lift detection mechanism 35 configured to detect a lift distance of the cutter 30. For example, the elevation detection mechanism 35 may be a distance sensor, and the elevation distance of the tool 30 is obtained by detecting the distance between the tool 30 and the chassis 40, that is, the length of the tool 30 extending out of or retracting into the chassis 40; alternatively, the elevation detection mechanism 35 may obtain the elevation distance of the tool 30 by detecting the rotation direction and the number of rotations of the elevation motor; alternatively, the elevation detection mechanism 35 may detect the distance of the tool 30 from the base plate 40 by a photoelectric sensor, a hall sensor, or the like. The embodiment of the present disclosure does not limit the specific form of the lift detection mechanism 35.

For example, the collision detection mechanism 60, the driving mechanism 33, the lifting driving mechanism 34, the lifting detection mechanism 35, and other structures may be fixed on the chassis 40, for example, directly disposed on the chassis 40 or fixed on the chassis 40 through a bracket, and the like, and the embodiment of the disclosure is not limited in this respect.

For example, in some embodiments, the lawn mower may further include a controller (not shown) communicatively coupled (e.g., via wired or wireless communication) to the impact detection mechanism 60 and the lift drive mechanism 35, and configured to control the lift drive mechanism 35 to drive the cutter 30 upward in the event that the impact detection mechanism 60 detects an impact. For example, the controller is also connected to the lifting detection mechanism 35 in a communication manner, and the controller can raise the tool 30 to a predetermined height, such as a safe height, for example, above the chassis 40 according to the feedback information of the lifting detection mechanism 35, so as to protect the tool 30 from an obstacle damaging the tool 30.

For example, in some embodiments, the protective device and the tool protection cover 10 are slidably or otherwise movably mounted on the chassis 40, for example, by a lifting structure (e.g., a lifting motor) connected to the chassis 40, and the like, and at this time, the protective device and the tool 30 can be lifted and lowered integrally with respect to the chassis 40, so as to achieve the effect of avoiding obstacles integrally and the like.

For example, before the lawn mower is used, the whole guard and the cutter 30 may be raised to the inside of the lawn mower to be hidden in the lawn mower, the lowered height of the guard and the cutter may be set according to the current mowing condition, and after the lawn mower moves to a predetermined position, for example, after the lawn mower is monitored and determined to be in a safe working environment, the whole guard and the cutter 30 may be lowered to the predetermined height, and then mowing work may be started.

For example, when the collision detection mechanism 60 detects that a collision of a component (e.g., the guard or the cutter 30) occurs, such as an obstacle (e.g., lawn sprinkler, a stone, etc.), the controller controls the guard and the cutter 30 to ascend integrally, such as to retract the guard and the cutter into the mower, thereby protecting the mower and facilitating the crossing of a complex terrain, and controls the guard and the cutter 30 to descend integrally to a certain height after the environment is safe, so as to continue to complete the mowing operation. For example, the controller may adaptively perform the adjustment of the tool lowering height according to the ground environment.

For example, after the mowing operation is completed, the guard and blade 30 are raised to the inside of the mower, and the mower can automatically return to the origin or to a charging station for standby.

In conclusion, the protection device provided by the embodiment of the disclosure can be covered on the cutter to form a hidden cutter, so that an effective protection effect can be provided for the cutter, safety events caused by exposure of the cutter are avoided, and good protection measures can be taken for children, small animals, fixed piles, automatic water spraying irrigation equipment and the like which may appear in a mowing environment; meanwhile, the problems of cutter damage, blockage, winding and the like of the cutter can be avoided, and the service life of the cutter is prolonged. In addition, the lawn mower provided by the embodiment of the disclosure is also provided with a controller, and the controller can automatically control the working state of the lawn mower so as to adapt to a complex mowing environment, improve mowing efficiency and safety and reduce labor cost.

The following points need to be explained:

(1) The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.

(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale.

(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.

Claims

1. A guard for a lawn mower, comprising:

a cutter guard configured to be capable of covering a cutter of the lawn mower;

wherein, the cutter protection casing includes:

the grass-entering surface comprises a plurality of first bar-shaped grids which are arranged in parallel,

a grass discharging surface comprising a grass discharging opening, an

The connecting surface is connected with the grass inlet surface and the grass outlet surface and comprises a plurality of second strip-shaped grids which are arranged in parallel, wherein at least part of the second strip-shaped grids is correspondingly connected with at least part of the first strip-shaped grids.

2. The shielding device of claim 1, wherein at least a portion of the first plurality of bar gratings is arcuate; alternatively, the first and second electrodes may be,

the plurality of first bar-shaped grids are linear, and at least parts of the plurality of first bar-shaped grids and at least parts of the plurality of second bar-shaped grids respectively form an angle A, so that the angle A is more than or equal to 180 degrees and is more than 90 degrees.

3. The guard of claim 1 or 2, further comprising:

the grass combing rolling brush is arranged in the cutter protective cover and is close to the grass entering surface and comprises a plurality of comb teeth.

4. Guard means according to claim 3 characterised in that the comb brush further comprises a roller around which the plurality of teeth are arranged to be rotatable,

the rolling shaft is parallel to the grass entering surface.

5. Guard means according to claim 4 characterised in that the teeth are each arranged to enable grass combing between adjacent first bar grates.

6. The guard of claim 1 or 2, wherein the grass surface comprises a plurality of third bar grids arranged in parallel with each other, at least a portion of the plurality of third bar grids being correspondingly connected with at least a portion of the plurality of second bar grids,

gaps between adjacent third strip grids in the plurality of third strip grids form the grass outlet.

7. The guard device of claim 6, wherein a number of the third plurality of bar gratings is less than a number of the second plurality of bar gratings.

8. A lawn mower, comprising:

the cutting tool is provided with a cutting tool,

the guard of any one of claims 1-7, a blade guard of the guard being disposed over the blade.

9. The lawnmower of claim 8, further comprising:

a chassis disposed at a bottom of the lawn mower, the cutter being disposed on or exposed by the chassis,

the guard is mounted to the chassis.

10. A lawnmower as claimed in claim 9, wherein the guard is removably mounted to the chassis.

11. A lawnmower as claimed in claim 9, wherein the cutter and guard are provided at the front or middle of the chassis.

12. The mower of claim 8 wherein the cutter comprises at least two layers of blades arranged in a stack and a drive mechanism to drive the at least two layers of blades,

the drive mechanism is configured to drive the at least two layers of blades into relative motion to effect mowing.

13. The lawnmower of claim 12, further comprising:

a collision detection mechanism configured to determine whether a collision occurs by detecting displacement or deformation of the guard, the cutter, or the driving mechanism or detecting a current or voltage of the driving mechanism.

14. The lawnmower of claim 13, further comprising:

and the lifting driving mechanism is at least connected with the cutter and is configured to drive the cutter to lift.

15. The lawnmower of claim 14, further comprising:

and the lifting detection mechanism is configured to detect the lifting distance of the cutter.

16. The lawnmower of claim 14, further comprising:

and the controller is in communication connection with the collision detection mechanism and the lifting driving mechanism and is configured to control the lifting driving mechanism to drive the cutter to ascend under the condition that the collision detection mechanism detects the collision.