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公开(公告)号：US11597275B2
公开(公告)日：2023-03-07
申请号：US17074829
申请日：2020-10-20
Applicant: Kubota Corporation
Inventor： Masahiro Yamada , Hirokazu Ito , Tomohiko Hisakuni
Abstract: In a work vehicle, a pivot axis of an operating lever and a rotary axis of a potentiometer are located on a same axis. An interlocking mechanism includes an input part which inputs power of the operating lever following the operating lever about the pivot axis as a pivot, and an output part which is supported to a rotary operation shaft and outputs power of the input part to the rotary operation shaft. The input part and the output part are operably connected via a connecting pin.
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公开(公告)号：US11433771B2
公开(公告)日：2022-09-06
申请号：US17078168
申请日：2020-10-23
Applicant: Kubota Corporation
Inventor： Kazuaki Matsuda , Hirokazu Ito , Yasuhiro Manji
IPC: B60L7/24 , A01D34/78 , B60T1/00 , B60T13/74 , F16D59/02 , B60T17/18 , B60T8/17 , A01D34/66 , A01D34/68 , A01D69/02 , B60L1/00 , A01D34/00 , A01D101/00
Abstract: An electric travelling vehicle including: a motor controller configured to control an electric motor based on displacement of a steering operation part to a forward travel position, a neutral position, and a rearward travel position, a brake controller configured to bring an electromagnetic power-off brake into a released state or a braking state; and a travel state detector configured to detect a travelling state that is accompanied with the released state, a stopped state that is accompanied with the braking state, and a transit stopped state that is accompanied with the braking state.
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公开(公告)号：US11382264B2
公开(公告)日：2022-07-12
申请号：US16009868
申请日：2018-06-15
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Yasuhiro Manji
Abstract: A mower unit 3 includes a rotational shaft extending upwards through a top wall of a mower deck, a cutter blade attached to a lower portion of the rotational shaft, a mower motor 4 having a rotor 43 disposed upward and a coil 42 disposed downward along an axial direction of an output shaft 41, a mount deck 5 having a horizontal mounting face for mounting the mower motor 4 in such a manner that the output shaft 41 assumes a vertical posture, the mount deck protruding outwards from a side wall of the mower deck, and a cooling arrangement 50 incorporated in the mound deck 5 for discharging heat of the mower motor 4.
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公开(公告)号：US20220080818A1
公开(公告)日：2022-03-17
申请号：US17339215
申请日：2021-06-04
Applicant: Kubota Corporation
Inventor： Masahiro Yamada , Hirokazu Ito , Makoto Odagiri
Abstract: An electric work vehicle includes: a carrier 32 in which a battery can be stored and a support portion 40 is provided; a carrier storage portion provided in a vehicle body and capable of holding the carrier 32; a guide portion 21, 22 that is capable of supporting, via the support portion 40, the carrier 32 operated so as to be lifted from the ground, in a state in which the carrier is lifted from the ground, and guiding the carrier 32 toward the carrier storage portion; and a positioning portion 42 configured to, when the carrier 32 placed on the ground is operated so as to be lifted and the support portion 40 has reached a position at which the support portion 40 can be supported by the guide portion 21, 22, stop the operation of lifting the carrier 32.
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公开(公告)号：US20220078971A1
公开(公告)日：2022-03-17
申请号：US17344124
申请日：2021-06-10
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Nozomu Akiyama
Abstract: An electric motor 15 includes a motor section 15b and an output shaft 15a protruding from the motor section 15b. The output shaft 15a supports a rotary fan 24. The rotary fan 24 is drivable by the output shaft 15a to rotate to supply cooling air to the motor section 15b.
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Patent Agency Ranking
公开(公告)号：US11258218B2
公开(公告)日：2022-02-22
申请号：US16434331
申请日：2019-06-07
Applicant: Kubota Corporation
Inventor： Katsuhiko Uemura , Hirokazu Ito , Yasuhiro Manji
Abstract: Provided is a battery connector assembly that allows adaptation of a connector of a battery to both a connector of an electric work vehicle and a connector of a charger. The assembly includes, in a connector assembly box, a battery connecting connector removably connected to a battery side connector having a plurality of terminals to be connected to the battery a vehicle connecting connector removably connected to a vehicle side connector having a plurality of terminals to be connected to the electric work vehicle and a charger connecting connector removably connected to a charger side connector provided in a charger for charging power supplied from an external power source to the battery and having a plurality of terminals.
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公开(公告)号：US20200367431A1
公开(公告)日：2020-11-26
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：US10821854B2
公开(公告)日：2020-11-03
申请号：US15833034
申请日：2017-12-06
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Yasuhiro Manji
IPC: B60L1/00 , B62D11/04 , A01D34/00 , A01D34/66 , A01D34/78 , A01D69/02 , B60L58/15 , B60L7/10 , B60L7/00 , B60L15/02 , B60L7/22 , B60L11/18 , A01D101/00 , B60L7/16
Abstract: An electric work vehicle includes: an electric motor unit including a plurality of motors (21, 22, and 130); a motor control unit (50) that adjusts electric power from a battery (20) and supplies the adjusted electric power to the electric motor unit by controlling an inverter (4); a charge control section (53) that controls charging and discharging of the battery (20); a battery state detection device (9) that detects a state of the battery (20) including a rate of charge; and a regenerative electric power detection device (6) that detects a generation of regenerative electric power. When the rate of charge is in a margin region that is set between an overcharge region and a charge/discharge region, and when regenerative electric power is generated, the motor control unit (50) supplies the regenerative electric power to a motor that is not in operation, and provides a non-rotation current instruction to the inverter (4), the non-rotation current instruction being an instruction for generating a magnetic flux that does not cause the motor to rotate by using vector control.
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公开(公告)号：US20200290465A1
公开(公告)日：2020-09-17
申请号：US16666684
申请日：2019-10-29
Applicant: Kubota Corporation
Inventor： Kazuaki Matsuda , Hirokazu Ito , Masahiro Yamada , Tomohiko Hisakuni
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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公开(公告)号：US20200208657A1
公开(公告)日：2020-07-02
申请号：US16677400
申请日：2019-11-07
Applicant: Kubota Corporation
Inventor： Katsuhiko Uemura , Hirokazu Ito , Yasuhiro Manji , Kazuaki Matsuda
Abstract: Provided is an electric work vehicle having a simple configuration, yet allowing a hydraulic cylinder to function appropriately even in a low-temperature environment. An electric work vehicle includes a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder and includes also a hydraulic system for feeding work oil to these hydraulic cylinders and a traveling motor. The hydraulic system includes an oil heating circuit for heating the work oil using heat generated from the traveling motor.
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