Robot Mower

Patent metadata

Field	Value
Publication number	US-2019364727-A1
Application number	US-201815996608-A
Country	US
Kind code	A1
Filing date	Jun 4, 2018
Priority date	Jun 4, 2018
Publication date	Dec 5, 2019
Grant date	—

Abstract

A robot mower includes a left cutter blade unit rotatably about a left vertical shaft to generate a left rotation locus, a right cutter blade unit rotatably about a right vertical shaft to generate a right rotation locus and a center cutter blade unit rotatably about a center vertical shaft to generate a center rotation locus. The left cutter blade unit and the right cutter blade unit are disposed forwardly of the rear wheel unit and spaced apart from each other in a vehicle body transverse direction. A portion of the left rotation locus protrudes more on a lateral outer side than the vehicle body and the left rear wheel and a portion of the right rotation locus protrudes more on a lateral outer side than the vehicle body and the right rear wheel. The center cutter blade unit is disposed between the left rear wheel and the right rear wheel in such a manner as to cover an uncut area formed due to presence of a gap between the left cutter blade unit and the right cutter blade unit.

First claim

1 . A robot mower configured to carry out a grass cutting work while traveling, the robot mower comprising:
a vehicle body; a front wheel unit; a rear wheel unit having a left rear wheel and a right rear wheel; and a mower unit supported to the vehicle body; wherein the mower unit includes:
a left cutter blade unit rotatably about a left vertical shaft to generate a left rotation locus;
a right cutter blade unit rotatably about a right vertical shaft to generate a right rotation locus; and
a center cutter blade unit rotatably about a center vertical shaft to generate a center rotation locus;
wherein the left cutter blade unit and the right cutter blade unit are disposed forwardly of the rear wheel unit and spaced apart from each other in a vehicle body transverse direction; a portion of the left rotation locus protrudes more on a lateral outer side than the vehicle body and the left rear wheel; a portion of the right rotation locus protrudes more on a lateral outer side than the vehicle body and the right rear wheel; and wherein the center cutter blade unit is disposed between the left rear wheel and the right rear wheel in such a manner as to cover an uncut area formed due to presence of a gap between the left cutter blade unit and the right cutter blade unit.

2 . The robot mower of claim 1 , wherein the front wheel unit is disposed between the left rotation locus and the right rotation locus.

3 . The robot mower of claim 1 , wherein the front wheel unit comprises a single wheel disposed at the center in the vehicle body transverse direction.

4 . The robot mower of claim 2 , wherein:
the front wheel unit, the left rear wheel and the right rear wheel are displayed in a triangular layout as seen in a plan view; the left cutter blade unit, the right cutter blade unit and the center cutter blade unit are disposed in an inverted triangular layout as seen in a plan view and overlapped with each other.

5 . The robot mower of claim 1 , wherein the cutter blade unit comprises a string trimmer.

Assignees

• Kubota Kk

Inventors

• Yamada Masahiro

Classifications

• A01D34/66

  with two or more cutters · CPC title

• A01D34/008

  for automated or remotely controlled operation · CPC title

• A01D34/416 Primary

  Flexible line cutters · CPC title

• A01D34/84 Primary

  for edges of lawns or fields, e.g. for mowing close to trees or walls ({for embankments A01D34/86 takes precedence;} edge trimmers A01G3/00) · CPC title