Lawn mower robot

Patent metadata

Field	Value
Publication number	US-11140823-B2
Application number	US-201916375505-A
Country	US
Kind code	B2
Filing date	Apr 4, 2019
Priority date	Apr 6, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A lawn mower robot includes an outer cover; an inner body accommodated into the outer cover to mount a plurality of wheels for traveling on both sides thereof; a plurality of blades rotatably mounted on a bottom surface of the inner body to mow the grass; a plurality of support portions arranged to be spaced apart in front-rear and left-right directions on an upper portion of the inner body to movably support the outer cover in front-rear and left-right directions with respect to the inner body; and a plurality of injury preventing walls provided on a bottom surface of the inner body to prevent a user's hand from entering toward the plurality of blades from a lower portion of the outer cover, thereby preventing a user's hand or the like from entering the blades through a lower portion of the outer cover so as to improve safety.

First claim

What is claimed is:

1. A lawn mower robot, comprising:
an outer cover;
an inner frame received in the outer cover, one or more wheels that provide a driving force to move the lawn mower robot being coupled to one or more sides of the inner frame;
one or more blades that are rotatably coupled to a lower surface of the inner frame to mow grass;
a plurality of support post positioned to be spaced apart on an upper region of the inner frame to movably support the downward outer cover with respect to the inner frame; and
a plurality of walls extending from the inner frame, the plurality of walls being configured to prevent a user's hand from being inserted under the outer cover and into a region associated with the blades,
wherein the plurality of walls include:
a first wall protruded downward from a front side of the inner frame; and
second walls protruded downward from left and right sides of the inner frame, respectively, and

wherein each of the first wall and the second walls includes a plurality of drainage holes on a bottom surface thereof.

2. The lawn mower robot of claim 1 , wherein the plurality of walls include:
a first wall protruded downward from a rear side of the inner frame.

3. The lawn mower robot of claim 1 , further comprising:
a charging terminal assembly positioned in the front side of the inner frame and having a plurality of charging terminals,
wherein the first wall is positioned at a lower region of the charging terminal assembly.

4. The lawn mower robot of claim 1 , wherein the first wall includes:
a plurality of protrusions extending downward from the front side of the inner frame; and
a plurality of connecting extensions provided between and connecting the plurality of protrusions.

5. The lawn mower robot of claim 4 , wherein the plurality of protrusions are spaced apart in a left-right lateral direction of the inner frame, the plurality of connecting extension extend in a left-right lateral direction of the inner frame, and the plurality of protrusions and the plurality of connecting extensions are positioned to alternate with each other.

6. The lawn mower robot of claim 4 , wherein each of the plurality of protrusions extends in front-rear and downward directions with respect to the plurality of connecting extensions.

7. A lawn mower robot, comprising:
an outer cover;
an inner frame received in the outer cover, one or more wheels that provide a driving force to move the lawn mower robot being coupled to one or more sides of the inner frame;
one or more blades that are rotatably coupled to a lower surface of the inner frame to mow grass;
a plurality of support post positioned to be spaced apart on an upper region of the inner frame to movably support the downward outer cover with respect to the inner frame; and
a plurality of walls extending from the inner frame, the plurality of walls being configured to prevent a user's hand from being inserted under the outer cover and into a region associated with the blades,
wherein the plurality of walls include:
a first wall protruded downward from a front side of the inner frame; and
second walls protruded downward from left and right sides of the inner frame, respectively,

wherein the first wall includes:
a plurality of protrusions extending downward from the front side of the inner frame; and
a plurality of connecting extensions provided between and connecting the plurality of protrusions, and

wherein each of the plurality of protrusions has a curved section formed in a semicircular curved shape at a lower end thereof.

8. The lawn mower robot of claim 1 , wherein the second walls include:
inner wall regions extended downward from the left and right sides of the inner frame, respectively, to extend lower than a lower end of the outer cover;
a lower wall region horizontally extended from a lower end of the inner wall regions to an exterior in a right-left lateral direction;
an outer wall region extended upward from the lower wall region to be higher than a lower end of the outer cover; and
a forward inclined surface region extended in a downwardly inclined direction from a front upper end of the inner wall regions to a front end of the lower wall region.

9. A lawn mower robot, comprising:
an outer cover;
an inner frame received in the outer cover, one or more wheels that provide a driving force to move the lawn mower robot being coupled to one or more sides of the inner frame;
one or more blades that are rotatably coupled to a lower surface of the inner frame to mow grass;
a plurality of support post positioned to be spaced apart on an upper region of the inner frame to movably support the downward outer cover with respect to the inner frame; and
a plurality of walls extending from the inner frame, the plurality of walls being configured to prevent a user's hand from being inserted under the outer cover and into a region associated with the blades,
wherein the plurality of walls include:
a first wall protruded downward from a front side of the inner frame; and
second walls protruded downward from left and right sides of the inner frame, respectively, and

wherein the second walls include:
inner wall regions extended downward from the left and right sides of the inner frame, respectively, to extend lower than a lower end of the outer cover;
a lower wall region horizontally extended from a lower end of the inner wall regions to an exterior in a right-left lateral direction;
an outer wall region extended upward from the lower wall region to be higher than a lower end of the outer cover;
a forward inclined surface region extended in a downwardly inclined direction from a front upper end of the inner wall regions to a front end of the lower wall region; and

a plurality of inner ribs extended in a width direction between the inner wall region and the outer wall region.

10. The lawn mower robot of claim 1 , wherein the second walls include:
side surface regions that are extended to protrude downward from the left and right sides of the inner frame, respectively;
a lower surface region that is horizontally extended from a lower end of the side surface regions;
an upper surface region that is spaced apart upward from the lower surface region;
a front inclined surface region that is extended in an inclined manner to connect front end portions of the upper surface region and the lower surface region, respectively, such that the front inclined surface includes an upper end that is provided ahead of a lower end thereof toward a front side thereof; and
a rear inclined surface region that is extended in an inclined manner to connect one or more rear end portions of the upper surface region and the lower surface region, respectively, such that the rear inclined surface region includes an upper end that is provided ahead of a lower end thereof toward a front side thereof.

11. A lawn mower robot, comprising:
an outer cover;
an inner frame received in the outer cover, one or more wheels that provide a driving force to move the lawn mower robot being coupled to one or more sides of the inner frame;
one or more blades that are rotatably coupled to a lower surface of the inner frame to mow grass;
a plurality of support post positioned to be spaced apart on an upper region of the inner frame to movably support the downward outer cover with respect to the inner frame; and
a plurality of walls extending from the inner frame, the plurality of walls being configured to prevent a user's hand from being inserted under the outer cover and into a region associated with the blades,
wherein the plurality of walls include:
a first wall protruded downward from a front side of the in

Assignees

• Lg Electronics Inc

Inventors

• Hong woo
• Kim Siyong
• Kim Hanshin
• Song Hyunsup
• Cho Kyeongho
• Han Jaehun
• Ha Jiwoo

Classifications

• A01D34/828 Primary

  Safety devices · CPC title

• A01D34/008 Primary

  for automated or remotely controlled operation · CPC title

• A01D34/81

  Casings; Housings (A01D34/71 takes precedence) · CPC title

• A01D2101/00

  Lawn-mowers · CPC title