公开(公告)号：US10967903B2

公开(公告)日：2021-04-06

申请号：US16185303

申请日：2018-11-09

Applicant: Kubota Corporation

Inventor： Katsuhiko Uemura ,  Hirokazu Ito

IPC: B62D6/08 ,  B60L15/32 ,  B60K7/00 ,  B62D11/04 ,  B62D11/00 ,  B60L15/20 ,  B60L1/00 ,  A01D34/00 ,  A01D34/66

Abstract: An electrically powered work vehicle includes a left driving wheel and a right driving wheel that are supported to a vehicle body, a left motor for driving the left driving wheel and a right motor for driving the right driving wheel, a steering wheel, an acceleration operation tool, a turning command calculation section for calculating a turning command based on a steering operation amount of the steering wheel, a turning torque calculation section for calculating a turning torque based on the turning command, a vehicle speed command calculation section for calculating a vehicle speed command based on an acceleration operation amount of the acceleration operation tool, a vehicle speed torque calculation section for calculating a vehicle speed torque based on the vehicle speed command, and a speed command calculation section for calculating a left motor speed command and a right motor speed command based on the turning torque and the vehicle speed torque.

公开(公告)号：US20200367430A1

公开(公告)日：2020-11-26

申请号：US16692463

申请日：2019-11-22

Applicant: Kubota Corporation

Inventor： Hirokazu Ito ,  Motosumi Shiotsuki

IPC: A01D34/73 ,  A01D34/82

Abstract: A cutter blade for a mower is disposed inside a housing of the mower and rotatably driven about a vertical axis. The cutter blade includes a blade body a blade portion provided at least at a part of a rotational direction-wise front end portion of the blade body, and a wind generating portion provided at least at a part of a rotational direction-wise rear end portion of the blade body, the wind generating portion extending more upwards than the blade portion. A thickness of the wind generating portion at the rotational direction-wise rear end portion is smaller at least partially than a thickness of the remaining part of the wind generating portion.

公开(公告)号：US20200205343A1

公开(公告)日：2020-07-02

申请号：US16688237

申请日：2019-11-19

Applicant: Kubota Corporation

Inventor： Hirokazu Ito ,  Katsuhiko Uemura ,  Kazuaki Matsuda

IPC: A01D43/063 ,  A01D34/64 ,  A01D34/71

Abstract: In an electric grass cutting machine relating to the present invention, an electric motor for driving a traveling device having a pair of left and right front wheels and a pair of left and right rear wheels and a gear transmission for speed-changing output from the electric motor and transmitting the resultant power to the traveling device are disposed between the left and right rear wheels and arranged one after the other in the front/rear direction at positions laterally of a conveying duct for guiding cut grass pieces from a rear discharge type mower device to a grass collecting container supported to a rear portion of a machine body frame.

公开(公告)号：US10667464B2

公开(公告)日：2020-06-02

申请号：US15800286

申请日：2017-11-01

Applicant: Kubota Corporation

Inventor： Yasuhiro Manji ,  Hirokazu Ito

IPC: A01D69/00 ,  A01D34/78 ,  A01D34/66 ,  A01D34/64 ,  A01D34/81

Abstract: Disclosed is a mower unit including, on a mower deck that rotatably supports a blade, a deck-side electric component configured to drive the blade, and a joint section for effecting connection and disconnection of a harness that electrically connects the deck-side electric component to a vehicle body-side electric component.

公开(公告)号：US20200014320A1

公开(公告)日：2020-01-09

申请号：US16411433

申请日：2019-05-14

Applicant: Kubota Corporation

Inventor： Hirokazu Ito ,  Yasuhiro Manji

IPC: H02P23/00 ,  B60L15/00 ,  B60L15/02 ,  B60L50/51 ,  B60L15/20

Abstract: Provided is a traveling control device capable of appropriately controlling the turning and the speed of a traveling vehicle. A traveling control device of a traveling vehicle including a traveling control unit having a pair of left and right configurations capable of respectively driving a pair of left and right driving wheels includes: an instruction receiving portion that receives an operation instruction directed to each of the pair of left and right driving wheels; a speed instruction value calculation portion that calculates a speed instruction value that is to be instructed to the traveling control unit, based on each of the operation instructions; an operation instruction determination portion that determines, based on each of the operation instructions, whether the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, or an operation instruction to rotate the pair of left and right driving wheels in different directions from each other; and a speed instruction value correction portion that corrects, if the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, one of the speed instruction values calculated for the traveling control unit by the speed instruction value calculation portion, based on the other speed instruction value.

公开(公告)号：US10477759B2

公开(公告)日：2019-11-19

申请号：US15835692

申请日：2017-12-08

Applicant: Kubota Corporation

Inventor： Kazuaki Matsuda ,  Katsuhiko Uemura ,  Hirokazu Ito ,  Yasuhiro Manji

IPC: A01D34/00 ,  A01D34/66 ,  A01D34/78 ,  B60L15/20 ,  B60W30/188 ,  A01D101/00

Abstract: A grass mower includes a vehicle speed instruction value calculation section (53) for generating a vehicle speed instruction value including a maximal vehicle speed, based on an operational position of a man-operable vehicle speed controlling tool (15), a mode selection section (70) for selecting a control mode from a plurality of control modes, a control table (52) in which a plurality of control parameters are set, a vehicle speed control target value calculation section (54) configured to calculate a vehicle speed control target value, based on a vehicle speed instruction value generated by the vehicle speed instruction value calculation section (53) and a selected control parameter corresponding to the control mode selected by the mode selection section (70), a cutter blade control target value calculation section (55) configured to calculate a rotational speed control target value for a cutter blade (30), based on the selected control parameter, and a cutter blade control section (4B) configured to control the cutter blade drive mechanism (31) based on the rotational speed control target value.

公开(公告)号：US10440885B2

公开(公告)日：2019-10-15

申请号：US14015111

申请日：2013-08-30

Applicant: KUBOTA CORPORATION

Inventor： Motosumi Shiotsuki ,  Akira Minoura ,  Kazuo Koike ,  Hirokazu Ito

IPC: A01D34/13 ,  A01D34/73

Abstract: Mower blade utilizes a blade portion formed on the blade main body and an air circulator portion formed on the blade main body and generating airflow via rotation centered around the vertically-oriented axis of the mower blade. The blade portion is arranged in a length-direction end portion of the blade main body and extends along a predetermined area in the length-direction. The air circulator portion is located opposite the blade portion in a width direction, has a rising upward portion, and extends along a predetermined area in the length-direction. A boundary portion is arranged between the blade main body and a rising upward portion of the air circulator portion has a portion inclined or angled with respect to the blade portion such that, beginning at the length-direction end portion, a distance between the boundary portion and the blade portion increases along the length-direction and moving toward the vertically-oriented axis. A height of an upper end portion of the air circulator portion measured from a surface of the blade main body is a substantially constant height.

公开(公告)号：US10188032B2

公开(公告)日：2019-01-29

申请号：US14640545

申请日：2015-03-06

Applicant: KUBOTA CORPORATION

Inventor： Hirokazu Ito ,  Yoshikazu Togoshi ,  Miyuki Ikeda

IPC: A01D34/78 ,  A01D34/81 ,  A01D101/00

Abstract: A mower includes a rotary blade cutting grass due to being rotationally driven. A work motor rotationally drives the rotary blade. A mower deck houses the rotary blade in an interior thereof. A first shroud forms an air flow passage along the work motor. The air flow passage connects the interior and exterior of the mower deck.

公开(公告)号：US20190014718A1

公开(公告)日：2019-01-17

申请号：US16009817

申请日：2018-06-15

Applicant: Kubota Corporation

Inventor： Katsuhiko Uemura ,  Hirokazu Ito ,  Kazuaki Matsuda ,  Yasuhiro Manji

IPC: A01D34/00 ,  A01D34/66 ,  A01D34/78

Abstract: An electric work vehicle includes: a battery accommodating portion that is provided in the vehicle body and accommodates a battery; a first connector provided on the battery accommodating portion; a second connector provided on the battery; and an operating tool for moving the battery and the second connector, and switching from a pre-attachment orientation in which the second connector opposes the first connector to an attachment orientation in which the second connector is joined to the first connector.

公开(公告)号：US20180338420A1

公开(公告)日：2018-11-29

申请号：US15800286

申请日：2017-11-01

Applicant: Kubota Corporation

Inventor： Yasuhiro Manji ,  Hirokazu Ito

IPC: A01D34/78

CPC classification number: A01D34/78 ,  A01D34/64 ,  A01D34/661 ,  A01D34/81 ,  A01D2034/645

Abstract: Disclosed is a mower unit including, on a mower deck that rotatably supports a blade, a deck-side electric component configured to drive the blade, and a joint section for effecting connection and disconnection of a harness that electrically connects the deck-side electric component to a vehicle body-side electric component.