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公开(公告)号：US20250018780A1
公开(公告)日：2025-01-16
申请号：US18769566
申请日：2024-07-11
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Takashi Shibata
Abstract: A control device 50 controls rotation of a first motor 21 and controls rotation of a second motor 22. In response to receiving a forward travel command from an operating device 51, the control device 50 controls rotation of the second motor 22 in such a manner that combined motive power output by a planetary gear mechanism 41 is used as forward motive power. In response to receiving a reverse travel command from the operating device 51, the control device 50 controls rotation of the first motor 21 in such a manner that the first motor 21 decelerates or stops, and controls rotation of the second motor 22 in such a manner that motive power output by the planetary gear mechanism 41 is used as reverse motive power.
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公开(公告)号：US20240217349A1
公开(公告)日：2024-07-04
申请号：US18516350
申请日：2023-11-21
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Kentaro Habu
CPC classification number: B60L50/60 , B60L1/003 , B60L7/10 , B60L2200/40
Abstract: An electric work vehicle includes a travel device; a first electric motor configured to drive the travel device; a second electric motor configured to drive a pump; a battery configured to supply electric power to the first electric motor; a charging determination section configured to determine whether or not charging of the battery is needed; and a control device configured to control the first electric motor. The control device includes a regeneration control section configured to control regenerated power generated by the first electric motor, and in response to the charging determination section determining that charging of the battery is not needed, the regeneration control section performs control to supply the regenerated power from the first electric motor to the second electric motor.
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公开(公告)号：US11850945B2
公开(公告)日：2023-12-26
申请号：US17840834
申请日：2022-06-15
Applicant: Kubota Corporation
Inventor： Takumi Yamamoto , Tomohiko Hisakuni , Masahiro Yamada , Hirokazu Ito
CPC classification number: B60L1/00 , B60L50/60 , B60L53/00 , H02J7/007 , H02J7/00045 , H02J7/0063 , H02J7/0068 , B60L2200/40 , B60L2210/40 , H02J2207/20
Abstract: A power supply device for an electric work vehicle, including: a battery by which an electric work vehicle is drivable; a first connection unit for an internal inverter configured to convert DC power from the battery into AC power, and output the AC power to an internal electric device installed in the electric work vehicle; a second connection unit for an external inverter configured to convert DC power from the battery into AC power, and output the AC power to an external electric device; and a battery control unit connected to the first connection unit and the second connection unit, and configured to control charging of, and power supply from, the battery, wherein the battery control unit is configured to communicate with the external inverter side via the second connection unit to perform authentication regarding whether or not power supply to the external inverter is permitted.
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公开(公告)号：US11753058B2
公开(公告)日：2023-09-12
申请号：US17339260
申请日：2021-06-04
Applicant: Kubota Corporation
Inventor： Kazutomo Miyaguchi , Hirokazu Ito
CPC classification number: B62B1/12 , B62B5/0079
Abstract: A movement assisting tool (23) includes an attachment portion (24) that can be attached to and removed from a main body portion (11) of a battery unit (4), leg portions (25) that are coupled to the attachment portion (24) and extend from the attachment portion (24), and moving wheels (26) that are supported by extension portions of the leg portions (25). In a state where the attachment portion (24) has been attached to the main body portion (11) of the battery unit (4) and the moving wheels (26) are touching the ground, the battery unit (4) can be kept in an inclined orientation in which the wheels (13) are touching the ground and ground contact portions (14) are raised above the ground.
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公开(公告)号：US11690317B2
公开(公告)日：2023-07-04
申请号：US16692463
申请日：2019-11-22
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Motosumi Shiotsuki
IPC: A01D34/00 , A01D34/73 , A01D34/82 , A01D101/00
CPC classification number: A01D34/73 , A01D34/82 , A01D2101/00
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.
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Patent Agency Ranking
公开(公告)号：US11632906B2
公开(公告)日：2023-04-25
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 , A01D101/00
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.
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公开(公告)号：US20230090301A1
公开(公告)日：2023-03-23
申请号：US17840834
申请日：2022-06-15
Applicant: Kubota Corporation
Inventor： Takumi Yamamoto , Tomohiko Hisakuni , Masahiro Yamada , Hirokazu Ito
Abstract: A power supply device for an electric work vehicle, including: a battery by which an electric work vehicle is drivable; a first connection unit for an internal inverter configured to convert DC power from the battery into AC power, and output the AC power to an internal electric device installed in the electric work vehicle; a second connection unit for an external inverter configured to convert DC power from the battery into AC power, and output the AC power to an external electric device; and a battery control unit connected to the first connection unit and the second connection unit, and configured to control charging of, and power supply from, the battery, wherein the battery control unit is configured to communicate with the external inverter side via the second connection unit to perform authentication regarding whether or not power supply to the external inverter is permitted.
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公开(公告)号：US11582909B2
公开(公告)日：2023-02-21
申请号：US16668809
申请日：2019-10-30
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Kazuaki Matsuda
Abstract: The mower unit includes a mower deck having a top wall and side walls extending downwards from an outer circumferential edge of the top wall, a rotational shaft extending upwards through the top wall from an inside space formed by the top wall and the side walls, a cutter blade attached to a lower portion of the rotational shaft within the inside space and rotatable together with the rotational shaft, an electric mower motor having an output shaft that can rotatably drive the rotational shaft, and a flywheel rotatable in association with the rotational driving of the mower motor.
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公开(公告)号：US11303240B2
公开(公告)日：2022-04-12
申请号：US16411433
申请日：2019-05-14
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Yasuhiro Manji
Abstract: Provided is a traveling control device capable of appropriately controlling the turning and the speed of a traveling vehicle. The traveling control device 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; an operation instruction determination portion that determines whether the operation instruction is an operation instruction to rotate the pair of driving wheels in the same direction or an operation instruction to rotate the pair of driving wheels in different directions; and a speed instruction value correction portion that corrects, if the operation instruction is an operation instruction to rotate the pair of driving wheels in the same direction, one of the speed instruction values, based on the other speed instruction value.
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公开(公告)号：US11273716B2
公开(公告)日：2022-03-15
申请号：US16666684
申请日：2019-10-29
Applicant: Kubota Corporation
Inventor： Kazuaki Matsuda , Hirokazu Ito , Masahiro Yamada , Tomohiko Hisakuni
IPC: B60L50/64 , B60L53/80 , A01D34/78 , A01D34/66 , A01D101/00
Abstract: An electric work vehicle includes a vehicle body having traveling wheels, a traveling motor capable of driving the traveling wheels, and a battery unit having, at one end portion thereof, a pair of left and right leg wheels, the battery unit being detachably attachable to a battery storage section of the vehicle body and being capable of supplying electric power to the traveling motor. The battery unit, when detached from the battery storage section, is posture-switchable between a flat placement state in which the leg wheels and the other end portion thereof opposite to the side on which the leg wheels are located are placed in contact with the ground surface and a tilted posture in which the battery unit can stand on its own with the other end portion thereof being located higher than the leg wheels.
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