CN215345889U - Blade disc safety cover and lawn mower - Google Patents

Abstract

The embodiment of the utility model discloses a cutter head protective cover and a mower, wherein the cutter head protective cover comprises: the protective cover comprises a protective cover main body, a first protective cover and a second protective cover, wherein the protective cover main body is provided with an inlet side and an outlet side, and the inlet side faces to the advancing direction of the protective cover main body; at least, a plurality of grid teeth are arranged on part of the circumference direction of the protective cover main body at intervals, the grid teeth extend towards the direction far away from the protective cover main body and form an accommodating space for accommodating a cutting tool together with the protective cover main body, and an object inlet channel communicated with the accommodating space is formed between every two adjacent grid teeth. According to the technical scheme provided by the embodiment of the utility model, the cutting tool is shielded by the plurality of grid teeth, so that the cutting tool is prevented from touching people or objects, the damage to the cutting tool is avoided while the people are protected, and the cutter head protective cover can effectively prevent the cutting tool from throwing foreign matters out, thereby avoiding hurting people.

Description

Blade disc safety cover and lawn mower

Technical Field

The embodiment of the utility model belongs to the technical field of mechanical equipment, and particularly relates to a cutter head protective cover and a mower.

Background

The intelligent mower capable of automatically moving and performing lawn trimming work has entered more and more people's lives, and brings convenience to people's lives.

In order to provide sufficient safety protection for users, lawn mowers are provided with various types of protective covers around the cutting blades to prevent the hands and feet of the operator from accidentally approaching the blades or the rotating blades from hitting foreign objects and hurting people. However, in the current stage of the mower, in order to have a good mowing effect, the cover body in the advancing direction of the mower is removed so as to facilitate grass to enter the mower for cutting, so that the safety of the mower is insufficient; some lawn mowers are provided with grass inlets in the advancing direction of the lawn mowers, but are limited by the material strength of the cover body, a large part of material is required to be reserved between the two grass inlets to ensure sufficient strength and rigidity, the reserved part has a large area facing the advancing direction of the lawn mowers, and the influence on the mowing effect is serious.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical problem in the prior art, the embodiment of the utility model provides a cutter head protection cover and a mower.

The embodiment of the utility model provides a cutter head protective cover, which comprises: a boot body having an entrance side and an exit side, the entrance side facing in a direction of advancement of the boot body;

at least be in the interval is provided with a plurality of bars tooth in the partial circumferencial direction of safety cover main part, and is a plurality of the bars tooth is to keeping away from the direction of safety cover main part extends, and with the safety cover main part encloses the accommodation space of synthetic holding cutting tool, adjacent two form between the bars tooth with the thing passageway of advancing that the accommodation space link up.

Optionally, an included angle between the extending direction of the object inlet channel and the advancing direction of the protective cover main body ranges from plus or minus 45 degrees.

Optionally, the boot body further has two side sides between the inlet side and the outlet side;

at least one side of the side is provided with a plurality of grating teeth or side protection plates.

Optionally, a plurality of grid teeth are arranged at intervals in the circumferential direction of the outlet side, and an outlet channel is formed between two adjacent grid teeth in the plurality of grid teeth on the outlet side.

Optionally, in the plurality of grid teeth, a guide surface is arranged at a joint of at least a part of the grid teeth and the protective cover main body, and the guide surface is an arc surface or an inclined surface.

Optionally, in the extending direction of the grid teeth, the end of the grid teeth far away from the protective cover main body exceeds the area where the cutting tool is located.

Optionally, in the radial direction of the cutting tool, an avoidance gap is formed between the grating teeth and an area covered by a revolution circle of the cutting tool.

Optionally, the minimum spacing between adjacent grating teeth is no greater than 25 mm.

Optionally, the grid teeth are one or a combination of a sheet structure or a cylindrical structure.

Optionally, when the grating teeth are of a sheet structure, the sheet structure includes two wide surfaces arranged opposite to each other and a narrow surface located between the two wide surfaces, and the narrow surface on one side of the sheet structure serves as an object-facing surface.

Accordingly, an embodiment of the present invention provides a lawn mower comprising: the cutting machine comprises a machine body, and a control module, a driving device and a cutting device which are respectively arranged on the machine body;

the control module is respectively in communication connection with the driving device and the cutting device;

the cutting device comprises a cutting motor, a cutting height adjusting mechanism and a cutting tool, wherein the cutting height adjusting mechanism and the cutting tool are respectively connected with the cutting motor;

the lawn mower further comprises: as in the cutter head protection cover in the above, the cutter head protection cover is located at the bottom of the machine body and is used for accommodating the cutting tool through the accommodating space, and the inlet side of the cutter head protection cover faces to the advancing direction of the mower.

According to the technical scheme provided by the embodiment of the utility model, the cutting tool is shielded by the plurality of grid teeth, so that the cutting tool is prevented from touching people or objects, the damage to the cutting tool is avoided while the people are protected, the cutting tool is cut in the accommodating space, and the cutter head protective cover can effectively prevent the cutting tool from throwing foreign matters out, so that the people are prevented from being injured; the object inlet channel between the adjacent grating teeth can enable the external object to be cut to enter the accommodating space and approach the cutting tool, and the cutting work efficiency and quality are not influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic top perspective view of a protection cover of a cutter head according to an embodiment of the present invention;

fig. 2 is a schematic bottom perspective view of a protection cover of a cutter head according to an embodiment of the present invention;

fig. 3 is a schematic top perspective view of another protection cover for an impeller according to an embodiment of the present invention;

fig. 4 is a schematic bottom perspective view of another cutterhead protection cover according to the embodiment of the present invention;

fig. 5 is a schematic perspective view illustrating a cutter head protecting cover and a cutting device according to an embodiment of the present invention after being connected;

fig. 6 is a schematic top view of a cutter head protecting cover and a cutting device according to an embodiment of the present invention;

fig. 7 is a schematic bottom perspective view of a lawn mower according to an embodiment of the present invention;

fig. 8 is a schematic side view of a lawn mower according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description of the present invention are used merely for convenience in describing different components or names, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

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 invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Fig. 1 is a schematic top perspective view of a cutterhead protection cover according to an embodiment of the present invention, fig. 2 is a schematic bottom perspective view of the cutterhead protection cover according to the embodiment of the present invention, fig. 3 is a schematic top perspective view of another cutterhead protection cover according to the embodiment of the present invention, and fig. 4 is a schematic bottom perspective view of another cutterhead protection cover according to the embodiment of the present invention, as shown in fig. 1 to 4.

The embodiment of the present invention provides a protection cover 100 for a cutter head, including: the protective cover comprises a protective cover main body 10 and a plurality of grid teeth 20 arranged on the protective cover main body 10, wherein the protective cover main body 10 is used for being connected with an external part, and simultaneously provides supporting points for the grid teeth 20, so that the whole cutterhead protective cover 100 is formed into an integral structure. The shroud body 10 has an entrance side 11 and an exit side 12, and the entrance side 11 faces the direction of advance of the cutter head shroud 100. It should be noted that, in the embodiment of the present invention, the deck protection cover 100 may be applied to a movable device such as a mower, and the advancing direction of the mower is the advancing direction of the deck protection cover 100.

At least a part of the circumference of the protective cover body 10 is provided with a plurality of grating teeth 20 at intervals, the plurality of grating teeth 20 extend in a direction away from the protective cover body 10 and enclose the protective cover body 10 to form an accommodating space for accommodating a cutting tool 51 (the cutting tool 51 is not shown in fig. 1 to 4, the cutting tool 51 can refer to fig. 5 and 6), and an inlet passage communicated with the accommodating space is formed between two adjacent grating teeth 20. In the embodiment of the present invention, the installation position of the grating teeth 20 includes, but is not limited to, the installation position on the entrance side 11 of the protection cover body 10, the installation position on the exit side 12, and the installation position on other positions, and the grating teeth 20 may be installed in any direction in which there is an installation risk during the operation to protect, and of course, the grating teeth 20 may be installed only in the direction in which there is a safety risk to shield the cutting tool 51, and the grating teeth 20 may be installed in the entire circumferential direction of the cutting tool 51 to shield the cutting tool 51.

In the embodiment of the present invention, the cutterhead protection cover 100 can be applied to the lawn mower 200, and can also be applied to other garden machines with cutting tools 51, taking the lawn mower 200 as an example, the inlet side 11 of the protection cover main body 10 can face the advancing direction of the lawn mower 200, grass bodies waiting for cutting can enter the accommodating space from the inlet side 11, and the cutting tools 51 can cut the objects entering the accommodating space, so as to play a role in tidying up lawns. The cutter head protection cover 100 is provided with a plurality of grid teeth 20 at intervals at least on the inlet side 11, the cutting tool 51 is shielded by the grid teeth 20, the cutting tool 51 is prevented from touching people or objects, the damage to the cutting tool 51 is avoided while the people are protected, the cutting tool 51 is cut in the accommodating space, and the cutter head protection cover 100 can effectively prevent the cutting tool 51 from throwing foreign matters out, so that the people are prevented from being injured; the material inlet channel between the adjacent grid teeth 20 can enable the external material to be cut to enter the accommodating space and approach the cutting tool 51, and the cutting work efficiency and quality are not influenced.

Further, the angle between the extending direction of the material inlet passage and the advancing direction of the protective cover main body 10 is within plus or minus 45 degrees. One way of achieving this is that the included angle between the plane of each grid tooth 20 and the perpendicular direction of the rotation tangent line of the cutting tool 51 is between plus or minus 45 degrees, so that the object to be cut on the moving path can smoothly enter the accommodating space along the object inlet channel between two adjacent grid teeth 20, and the object to be cut is cut by the cutting tool 51, thereby improving the cutting efficiency of the cutting tool 51 on the object to be cut. In addition, the grid teeth 20 are arranged at the periphery of the cutting tool 51, when the cutting tool 51 flies the object to be cut in the cutting process, the flying object can move along the direction of the rotation tangent line of the cutting tool 51 and contact with the grid teeth 20, at this time, because the included angle between the plane of each grid tooth 20 and the direction of the perpendicular line of the rotation tangent line of the cutting tool 51 is between plus or minus 45 degrees, a certain angle is formed between the direction of the object inlet channel between two adjacent grid teeth 20 and the direction of the rotation tangent line of the cutting tool 51, so that the direction of the object inlet channel between two adjacent grid teeth 20 is different from the flying direction of the object, the grid teeth 20 can fly the flying object, the object is prevented from flying out of the cutter head protective cover 100, and the danger is avoided, and the cutting safety of the cutting tool 51 on the object to be cut is improved.

In the embodiment of the present invention, according to different requirements, the cutter head protection cover 100 can be implemented in a plurality of implementation manners, for example, referring to fig. 1 and 2, one implementation manner is that only the inlet side 11 is provided with a plurality of grid teeth 20 at intervals, grass is combed into small strands of grass bundles through the plurality of grid teeth 20, which facilitates cutting of the cutting tool 51 in the accommodating space, and meanwhile, the plurality of grid teeth 20 shield the cutting tool 51, so as to prevent the cutting tool 51 from hurting people, prevent hard objects such as stones from entering the accommodating space and damaging the cutting tool 51, and simultaneously, effectively prevent the cutting tool 51 from throwing foreign objects, and avoid hurting people. The outlet side 12 of the protection cover main body 10 can be designed in an open mode, so that cut grass scraps can quickly move out of the accommodating space, and the mowing efficiency is improved.

Referring to fig. 3 and 4, another way to realize the cutterhead protection cover 100 is that a plurality of grating teeth 20 are arranged at intervals on both the inlet side 11 and the outlet side 12 of the protection cover main body 10, and grass is combed into small strands of grass bundles through the plurality of grating teeth 20 on the inlet side 11, so as to facilitate the cutting of the cutting tools 51 in the accommodating space. Through a plurality of grid teeth 20 of entrance side 11 and exit side 12, can realize sheltering from to cutting tool 51 along the circumferential direction, prevent that cutting tool 51 from hindering the people, also prevent simultaneously that hard things such as stone from getting into the accommodation space and damaging cutting tool 51, still can effectively block cutting tool 51 simultaneously and throw away the foreign matter, avoid hindering the people. The passage between the adjacent grating teeth 20 can make the external object to be cut enter and exit the containing space, and the cutting efficiency and quality are not influenced.

An application manner of the cutter head protection cover 100 is, with reference to fig. 1 and 2, see fig. 5 and 6, the cutter head protection cover 100 may be connected to a cutting device, the cutting device includes a cutting motor 50 and a cutting tool 51 connected to the cutting motor 50, the cutting tool 51 includes a cutter head 511 and a plurality of cutting blades 512 fixed to the cutter head 511, the cutting tool 51 is connected to the cutting motor 50 through the cutter head 511, the cutter head protection cover 100 is connected to the cutting motor 50 through a protection cover main body 10, a through hole 14 is provided on the protection cover main body 10, a driving shaft of the cutting motor 50 passes through the through hole 14 to be connected to the cutting tool 51, and the cutter head protection cover 100 accommodates the cutting tool 51 through an accommodation space.

Taking the example of applying the cutterhead protection cover 100 to the lawn mower 200, for example, referring to fig. 5 to 8 in combination with fig. 1 and 2, an implementation manner of the lawn mower 200 is that the lawn mower 200 includes: the cutting machine comprises a machine body, and a control module, a driving device 40 and a cutting device which are respectively arranged on the machine body. The control module is respectively connected with the driving device 40 and the cutting device in a communication manner, and the control module is arranged inside the machine body, so that the control module is not shown in the figure, a plurality of control buttons for sending control instructions are arranged on the machine body, and the control buttons are connected with the control module so as to control the mower 200 to operate. The driving device 40 includes a driving motor and driving wheels, the driving motor is disposed inside the body, and therefore not shown, the driving device 40 can be represented by the driving wheels, and the body is further provided with universal wheels 41 to facilitate steering of the mower 200.

The cutting device includes a cutting motor 50 (the cutting motor 50 shown in fig. 8 is a motor casing wrapped outside the cutting motor 50, the structure of the cutting motor 50 can be seen from fig. 5), and a cutting height adjusting mechanism (the cutting height adjusting mechanism is disposed in the machine body and is not shown in the figure) and a cutting tool 51 which are respectively connected with the cutting motor 50, the cutting tool 51 includes a cutter disc 511 and a plurality of cutting blades 512 fixed on the cutter disc 511, and the cutting tool 51 is connected with the cutting motor 50 through the cutter disc 511. The cutterhead protecting cover 100 is arranged at the bottom of the machine body, is connected with the cutting motor 50, and accommodates the cutting tool 51 through an accommodating space, and the inlet side 11 of the cutterhead protecting cover 100 faces the advancing direction of the mower 200.

When the mower 200 is used for mowing, the main body can move forward under the driving of the driving device 40, and can turn in cooperation with the universal wheels 41 during the moving forward. Meanwhile, during the advancing process, the grass to be cut enters the accommodating space from the inlet side 11 after being combed by the plurality of grating teeth 20. When the cutting motor 50 rotates, the cutter disc 511 is driven to rotate, and the cutting blades 512 on the periphery of the cutter disc 511 rotate along with the rotation, so as to cut grass to be cut. Carry out partial sheltering from to cutting tool 51 at least through a plurality of grid teeth 20, can avoid cutting tool 51 to touch people or thing, when realizing the protection to the people, also avoid cutting tool 51's damage to cutting tool 51 realizes the cutting in the accommodation space, and blade disc safety cover 100 can effectively block cutting tool 51 and throw away the foreign matter, avoids hindering the people. The material inlet channel between the adjacent grid teeth 20 can enable the external material to be cut to enter the accommodating space and approach the cutting tool 51, and the cutting work efficiency and quality are not influenced.

With continued reference to fig. 1-4, in the embodiment of the present invention, the implementation manner of the grid teeth 20 is various, and the grid teeth 20 are one or a combination of a sheet structure and a cylindrical structure. Of course, the grid teeth 20 may have other shapes and structures, and are not limited herein. When the grating teeth 20 are of a sheet structure, the sheet structure includes two wide surfaces arranged opposite to each other and a narrow surface located between the two wide surfaces, and the sheet structure is used as an object-facing surface through the narrow surface on one side. The small area of the blade-like configuration of the grill teeth 20, the object-facing, i.e., forward-facing, surface, does not obstruct the grass from approaching the cutter disc 511, and therefore does not reduce the effective cutting width of the mower 200. Meanwhile, in order to better shield flying objects, the included angle between the plane of the grid teeth 20 of the sheet structure and the perpendicular direction of the rotation tangent line of the cutter disc 511 is between plus or minus 45 degrees, the grid teeth 20 are arranged at the periphery of the cutting blade 512, when the cutting blade 512 flies the objects to be cut in the cutting process, the flying objects can move along the rotation tangent direction of the cutter disc 511 and contact with the grid teeth 20 at the periphery of the cutting blade 512, at this time, because the included angle between the plane of each grid tooth 20 and the perpendicular direction of the rotation tangent line of the cutter disc 511 is between plus or minus 45 degrees, the channel direction between two adjacent grid teeth 20 is different from the rotation tangent direction of the cutter disc 511, the channel direction between two adjacent grid teeth 20 is different from the flying direction of the objects, the grid teeth 20 can shift the flying objects, and the danger caused by the objects flying out of the accommodating space is avoided, the safety is improved.

In the embodiment of the present invention, the installation position of the grill teeth 20 is not limited to the installation position on the inlet side 11 and the outlet side 12 of the guard main body 10, and the grill teeth 20 may be installed in any direction in which there is a risk of installation during the operation of the lawnmower 200 to protect the lawnmower 200, but it is needless to say that the grill teeth 20 may be installed only in the direction in which there is a risk of safety to shield the cutter 51, or the grill teeth 20 may be installed over the entire circumference of the cutter 51 to shield the cutter 51.

Further safety is provided, in order to prevent limbs, such as fingers, of a person from extending into the accommodating space from the gaps between the grid teeth 20, the minimum distance between the adjacent grid teeth 20 is not more than 25 mm. The arrangement mode of the distance can ensure that the object to be cut has larger entering amount, improves the cutting efficiency, and simultaneously can prevent limbs of a human body, such as fingers, from entering the accommodating space and being damaged by the cutting tool 51, thereby further improving the use safety of the machine. In a practical embodiment, the distance between adjacent flaps is 11.5mm, and the two grating teeth 20 are arranged 11.5mm apart, even in the direction of the inlet side 11, to avoid that the fingers of an adult extend between the two grating teeth 20 and injure the person.

With continued reference to fig. 1 to 4, the protective cover body 10 further has two side edges 13 located between the entrance side 11 and the exit side 12, and in order to further improve safety, a plurality of grill teeth 20 or side protective plates 21 are provided on at least one of the side edges 13. As shown in fig. 1 and 2, the side protection plate 21 is provided on one side 13 of the protection cover body 10, and the side protection plate 21 may be used as the grid teeth 20, and if the side protection plate 21 is separated by a plurality of gaps, a plurality of grid teeth 20 are formed. Referring to fig. 7 and 8, in one usage, the cutting tool 51 is disposed at one side of the body, and the cutting tool 51 is disposed at a position on the right side of the body along the advancing direction, that is, the cutting tool 51 is disposed at a position on the right side of the body, in this usage, the right side of the cutting tool 51 is closer to the edge of the body, and is easy to touch hard objects such as human bodies or stones, therefore, the right side direction and the advancing direction of the cutting tool 51 are directions of installation risks, in order to avoid the cutting tool 51 from touching hard objects such as human bodies or stones, a shielding object may be disposed only in the right side direction and the advancing direction of the cutting tool 51, that is, a plurality of grid teeth 20 are disposed in the advancing direction, and a side protection plate 21 or a plurality of grid teeth 20 are disposed in the right side direction of the cutting tool 51.

Referring to fig. 3 and 4, a plurality of grating teeth 20 or side protection plates 21 may be disposed on the sides 13 at both sides, and the plurality of grating teeth 20 or side protection plates 21 at both sides can shield both sides of the cutting tool 51, thereby preventing the cutting tool 51 from touching hard objects such as human body or stone blocks at the sides.

Further, when the lawn mower 200 is used for mowing, when a certain grass body is not repaired to be flat, the grass body may repeatedly move forward and backward for trimming, and in order to avoid the cutting tool 51 from touching hard objects such as human bodies or stones during backward movement, with reference to fig. 3 and 4, in some practical embodiments, a plurality of grid teeth 20 are arranged at intervals in the circumferential direction of the outlet side 12, and an outlet channel is formed between two adjacent grid teeth 20 in the plurality of grid teeth 20 on the outlet side 12. The plurality of grating teeth 20 on the outlet side 12 shield the cutter 51 in the backward direction, so that the cutter 51 is prevented from touching people or objects, and the damage to the cutter 51 is avoided while the people are protected. The grid teeth 20 on the outlet side 12 are matched with the grid teeth 20 on the inlet side 11, the cutting tool 51 can be shielded along the circumferential direction, the safety is improved, and the passage between the adjacent grid teeth 20 can enable an external object to be cut to enter and exit the accommodating space, so that the cutting work efficiency and quality are not influenced.

With continued reference to fig. 1 and 2, in order to facilitate the object to be cut to enter the accommodating space, a guide surface 22 is disposed at a connection portion between at least a part of the plurality of grating teeth 20 and the protective cover main body 10, and the guide surface 22 is an arc surface or an inclined surface. When the grating teeth 20 contact with the object to be cut, such as the grass body, the grass body can be combed into small strands of grass bundles, meanwhile, the guide surface 22 can further reduce the obstruction of the grating teeth 20 to the grass body, and the grass bundles can rapidly enter the accommodating space through the guide of the guide surface 22 so as to complete cutting and improve the grass cutting efficiency.

To further increase the safety, the end of the grid teeth 20 facing away from the guard body 10 in the direction of extension of the grid teeth 20 extends beyond the region of the cutting tool 51. The grid teeth 20 are remote from the end of the shield body 10, i.e. the lowest point of the grid teeth 20. The cutting blade 51 is away from the end of the guard cover body 10, i.e., the lowest point of the cutting blade 51. That is, the lowest point of the grating teeth 20 is lower than the lowest point of the cutter 51 with respect to the ground, so that the protection of the bottom of the cutter 51 by the cutter cover 100 can be effectively improved, the contact of the user's fingers with the cutter 51 during the transportation of the machine can be effectively avoided, and the safety of the operation of the machine can be improved. Meanwhile, even when a human body or a hard object approaches from the lower part of the cutter head protection cover 100, the user can avoid touching the mowing tool above, when foreign matters such as stones are knocked out by the mowing tool or the mowing tool is damaged, the foreign matters can be blocked by the grating teeth 20 and are not easy to throw away, the situation that the foreign matters directly fly out of the cutter head protection cover 100 when the cutting cutter head 511 shoots out the object can be effectively avoided, and the intercepting efficiency of the cutter head protection cover 100 on the flying-out matters is improved.

In some realizable embodiments of the present embodiment, the difference in height between the end of each grill tooth 20 away from the boot body 10 and the end of the cutting blade 512 away from the boot body 10 is 5-20 mm. I.e. the difference in height between the lowest point of the grating teeth 20 and the lowest point of the cutting tool 51 is 5-20 mm. This difference in height can guarantee that blade disc safety cover 100 carries out the protection of preferred to cutting tool 51 bottom to and guarantee that blade disc safety cover 100 has better interception efficiency to the departure thing, further promote cutting protection device's protection effect and safety in utilization. Further, the height difference between the lowest point of the grating teeth 20 and the lowest point of the cutter 51 is 8mm, and the arrangement mode can better show the technical effects.

Further, in the radial direction of the cutter 51, there is an escape gap between the grating teeth 20 and the area covered by the revolution circle of the cutter 51. Through avoiding the gap, the cutting tool 51 can not contact with the grid teeth 20 when rotating, and meanwhile, the grass body entering the accommodating space can be fully contacted with the cutting tool 51, so that the cutting efficiency is improved. Further, in a specific embodiment, the minimum distance between the grid teeth 20 and the mowing tool in the radial direction of the mowing tool is greater than or equal to 3 mm.

Accordingly, referring to fig. 7 and 8 in combination with fig. 1 to 6, in an embodiment of the present invention, there is provided a lawn mower 200, including: the cutting machine comprises a machine body, and a control module, a driving device 40 and a cutting device which are respectively arranged on the machine body. The control module is connected to the driving device 40 and the cutting device in communication, and the control module is disposed inside the machine body, and therefore not shown in the drawings. The cutting device comprises a cutting motor 50, a cutting height adjusting mechanism and a cutting tool 51 which are respectively connected with the cutting motor 50, wherein the cutting tool 51 comprises a cutter disc 511 and a plurality of blades fixed on the cutter disc 511, and the cutting tool 51 is connected with the cutting motor 50 through the cutter disc 511.

The lawn mower 200 further includes: as in the cutterhead protection cover 100 of the embodiment, the cutterhead protection cover 100 is located at the bottom of the machine body and accommodates the cutting tools 51 through the accommodation space, and the inlet side 11 of the cutterhead protection cover 100 faces the traveling direction of the mower 200. The cutterhead protection cover 100 may be connected to the body and also to the cutting motor 50. The mower 200 is provided with an installation space in the body, the control module and the cutting height adjusting mechanism are respectively arranged in the installation space, the cutting height adjusting mechanism is connected with the cutting motor 50, the cutting motor 50 can reciprocate along the vertical direction of the mower 200 under the driving of the cutting height adjusting mechanism, namely, the cutting height adjusting mechanism can adjust the ground clearance of the cutting motor 50, so as to adjust the mowing height of the cutting cutterhead 511, the cutterhead protective cover 100 is connected with the cutting motor 50, if the cutterhead protective cover 100 is connected with the shell of the cutting motor 50, of course, the cutterhead protective cover 100 can also be connected to other parts moving up and down along with the cutting motor 50, no matter how the mowing height is set, the relative position of the cutterhead protective cover 100 and the cutting motor 50 is unchanged.

The driving shaft of the cutting motor 50 can pass through the through hole 14 on the cutter disc protecting cover 100 to be connected with the cutter disc 511, the cutter disc 511 is driven by the rotation of the cutting motor 50 to rotate, and the cutting blades 512 on the cutter disc 511 rotate along with the rotation of the cutting motor, so as to cut the grass entering the accommodating space. Meanwhile, the cutter disc 511 is also driven by the cutting height adjustment mechanism through the cutting motor 50 to reciprocate in a direction from being far from the lawn to being close to the lawn, and can be fixed at a certain position, thereby completing the adjustment of the mowing depth.

Further, a motor housing is provided around the cutting motor 50, and the protective cover main body 10 is connected to an end of the motor housing adjacent to the cutter disc 511. Be used for installing cutting motor 50 in the motor casing, the one side that the protection cover main part 10 deviates from cutter disc 511 is connected in the motor casing and is close to the one side of cutter disc 511, and the motor casing is fixed relatively with protection cover main part 10, and cutting motor 50's drive shaft passes the via hole 14 on motor casing and the protection cover main part 10 and is connected with cutter disc 511 to it is rotatory to drive cutter disc 511. In order to avoid the grass bits after the cutting, material such as dust gets into the motor casing along the gap between drive shaft and the motor casing in, motor casing and safety cover main part 10 are direct still to be equipped with dustproof construction, dustproof construction includes but not limited to for dustproof felt, can seal the gap between motor casing and the safety cover main part 10 through dustproof felt, also can cover the gap between motor casing and the drive shaft simultaneously, prevent the grass bits after the cutting, material such as dust gets into in the motor casing, avoid causing the influence to cutting motor 50, prevent that cutting motor 50 from damaging.

It should be noted that, for a specific implementation of the cutterhead protection cover 100, reference may be made to the description of the above embodiments, and details are not described herein.

The connection position of the cutterhead protection cover 100 and the machine body can be different according to different implementation modes of the cutterhead protection cover 100, and referring to fig. 7 and 8 in combination with fig. 1 and 2, a plurality of grid teeth 20 are arranged on the cutterhead protection cover 100 at intervals only on the inlet side 11, and a side protection plate 21 is arranged on one of the two side sides 13. The cutting tool 51 is disposed at one side of the body, and if the cutting tool 51 is disposed at a position on the far right side of the body, in order to prevent the cutting tool 51 from touching hard objects such as human body or stone, the shielding object can be disposed only in the right direction and the forward direction of the cutting tool 51, i.e., the plurality of grating teeth 20 are disposed in the forward direction, and the side protection plate 21 is disposed in the right direction of the cutting tool 51.

Referring to fig. 3 and 4, a plurality of grill teeth 20 are provided at intervals on both the entrance side 11 and the exit side 12 of the protector body 10, and side protection plates 21 are provided on both the sides 13. The cutting tool 51 can be arranged in the middle of the machine body or on one side of the machine body, and in such an arrangement, the periphery of the cutter disc 511 is shielded, so that the safety can be further improved.

It should be noted that, although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention should not be construed as limited to the scope of the present invention. In the case that the structures do not conflict with each other, the structures of the parts mentioned in the above embodiments may be combined with each other, and in order to avoid repetition, the technical solutions obtained after combination are not described herein again, but the technical solutions obtained after combination also belong to the protection scope of the present invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the present invention as described in the appended claims.

The examples of the embodiments of the present invention are intended to briefly describe the technical features of the embodiments of the present invention, so that those skilled in the art can intuitively understand the technical features of the embodiments of the present invention, and the embodiments of the present invention are not unduly limited.

The above-described embodiments of the apparatus are merely illustrative, where the units described as separate parts may or may not be physically separated, and the parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on multiple network units, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments, and those skilled in the art can understand and implement the embodiments without creative efforts.

While the foregoing description shows and describes several preferred embodiments of the utility model, it is to be understood, as noted above, that the embodiments are not limited to the forms disclosed herein, but are not to be considered as exclusive of other embodiments, and that the embodiments may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the embodiments of the utility model as defined by the appended claims.

Claims (11)

1. A cutterhead protection cover, comprising: a boot body having an entrance side and an exit side, the entrance side facing in a direction of advancement of the boot body;

at least be in the interval is provided with a plurality of bars tooth in the partial circumferencial direction of safety cover main part, and is a plurality of the bars tooth is to keeping away from the direction of safety cover main part extends, and with the safety cover main part encloses the accommodation space of synthetic holding cutting tool, adjacent two form between the bars tooth with the thing passageway of advancing that the accommodation space link up.

2. The cutterhead protection cover according to claim 1, wherein the angle between the direction of extension of the access channel and the direction of advance of the protection cover body is in the range of plus or minus 45 degrees.

3. The cutterhead protection cover of claim 1, wherein the protection cover body further has two side edges between the inlet side and the outlet side;

at least one side of the side is provided with a plurality of grating teeth or side protection plates.

4. The impeller shroud of claim 1 wherein a plurality of said grill teeth are circumferentially spaced about said outlet side, and wherein an exit passage is formed between adjacent ones of said grill teeth on said outlet side.

5. The cutterhead protection cover according to claim 1, wherein at least a portion of the plurality of grid teeth are provided with a guide surface at the junction with the protection cover body, the guide surface being an arc surface or an inclined surface.

6. The impeller shroud of any one of claims 1 to 5, wherein the ends of the grating teeth remote from the shroud body, in the direction of extension of the grating teeth, extend beyond the region where the cutting knives are located.

7. The impeller shroud of any one of claims 1 to 5, wherein there is an escape gap between the grating teeth and the area covered by the circle of revolution of the cutting tool in the radial direction of the cutting tool.

8. A cutterhead protection cover according to any one of claims 1 to 5, wherein the minimum spacing between adjacent grating teeth is no more than 25 mm.

9. The impeller shroud of any one of claims 1 to 5, wherein the grating teeth are one or a combination of a sheet-like structure or a cylindrical structure.

10. The cutterhead protection cover according to claim 9, wherein when the grid teeth are of a sheet structure, the sheet structure includes two wide faces that are opposite to each other and a narrow face that is located between the two wide faces, and the sheet structure is used as an object-facing face through the narrow face on one side.

11. A lawn mower, comprising: the cutting machine comprises a machine body, and a control module, a driving device and a cutting device which are respectively arranged on the machine body;

the control module is respectively in communication connection with the driving device and the cutting device;

the cutting device comprises a cutting motor, a cutting height adjusting mechanism and a cutting tool, wherein the cutting height adjusting mechanism and the cutting tool are respectively connected with the cutting motor;

the lawn mower further comprises: the cutterhead protection cover as claimed in any one of claims 1-10, being located at the bottom of the machine body and receiving the cutting tool through the receiving space, the inlet side of the cutterhead protection cover facing the direction of travel of the mower.

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