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公开(公告)号：US11981307B2
公开(公告)日：2024-05-14
申请号：US17840251
申请日：2022-06-14
Applicant: Kubota Corporation
Inventor： Yasuhiro Manji , Masahiro Yamada , Hirokazu Ito
CPC classification number: B60T7/045 , A01B76/00 , A01D34/828 , B60Q9/00 , B60T13/743 , B60L15/2009 , F16D2121/22
Abstract: A work vehicle includes: a body; a travel device supporting the body; a travel driver configured to drive the travel device; a brake configured to lock and unlock the travel device; a deactivation operation tool manually movable to a first position, at which the brake is operable to be activated and deactivated, and a second position, at which the brake is kept deactivated; a position detector configured to detect that the deactivation operation tool is at the second position; and a notifier configured to provide, based on a result of the detection by the position detector, a notification that the deactivation operation tool is at the second position.
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公开(公告)号：US20220314954A1
公开(公告)日：2022-10-06
申请号：US17528686
申请日：2021-11-17
Applicant: Kubota Corporation
Inventor： Yasuhiro Manji , Nozomu Akiyama
Abstract: A self-driving work vehicle, including: a traveling apparatus; a vehicle body supported by the traveling apparatus on ground; a variable traveling power supply apparatus configured to supply rotational drive power to the traveling apparatus; a travel operation interface configured to adjust a rate of the rotational drive power; a parking brake provided for a transmission shaft of the variable traveling power supply apparatus; a rotation detector configured to detect rotation of the traveling apparatus or the transmission shaft; and a controller configured or programmed to: control the parking brake to a braking state or a non-braking state by a parking brake control module; manage the braking state or the non-braking state as a vehicle body state by a condition management module, the braking state and the non-braking state being operating states of the parking brake.
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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：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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Patent Agency Ranking
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：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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公开(公告)号：US20190381900A1
公开(公告)日：2019-12-19
申请号：US16411473
申请日：2019-05-14
Applicant: Kubota Corporation
Inventor： Hirokazu Ito , Yasuhiro Manji
Abstract: Disclosed is an electric work vehicle that includes a traveling vehicle body, a wheel unit having wheels on the right and left sides of the traveling vehicle body, a motor for supplying rotational drive force to the wheel unit, and a battery for supplying electric power to the motor. The battery includes a first battery disposed at a right/left center of the traveling vehicle body, and second batteries disposed in right/left symmetricity on the traveling vehicle body to act as supplementary batteries.
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公开(公告)号：US20190156595A1
公开(公告)日：2019-05-23
申请号：US16003566
申请日：2018-06-08
Applicant: Kubota Corporation
Inventor： Yasuhiro Manji , Hirokazu Ito
Abstract: Disclosed is a work vehicle management system including: a battery work information generation unit that generates battery work information indicating a use state of a battery during work of a work vehicle; a battery deterioration information generation unit that chronologically diagnoses the battery work information to generate battery deterioration information that indicates a deterioration trend of the battery that is unique to the work vehicle; and a notification unit that performs notification of the battery deterioration information to a manager of the work vehicle.
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公开(公告)号：US20190124837A1
公开(公告)日：2019-05-02
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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