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公开(公告)号：US11486420B2
公开(公告)日：2022-11-01
申请号：US16677400
申请日：2019-11-07
申请人： Kubota Corporation
IPC分类号： H02K9/19 , F15B21/0427 , B60L50/60 , A01D34/74 , A01D34/78 , B60L1/00 , F15B13/08 , H02K11/00 , A01D34/66 , A01D101/00
摘要： 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：US11018383B2
公开(公告)日：2021-05-25
申请号：US15605994
申请日：2017-05-26
申请人： Kubota Corporation
发明人： Hirokazu Ito , Yasuhiro Manji
IPC分类号： H01M10/48 , H01M50/20 , H01M50/502
摘要： A battery pack includes a plurality of battery modules stacked with connecting terminals disposed at predetermined positions, a holding unit for holding the plurality of battery modules under the stacked state, a plurality of conducting paths connecting corresponding connecting terminals, and a substrate connected to the holding unit. The plurality of conducting paths are provided integrally in the substrate and disposed to connect the corresponding connecting terminals in association with connection of the substrate to the holding unit.
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公开(公告)号：US20210129904A1
公开(公告)日：2021-05-06
申请号：US15930575
申请日：2020-05-13
申请人： Kubota Corporation
发明人： Yasuhiro Manji
摘要： A traveling vehicle includes a left drive wheel and a right drive wheel which are driven independently by a left driving section and a right driving section, a manual operation unit configured to provide a left speed instruction for adjusting a rotational speed of the left drive wheel and a right speed instruction for adjusting a rotational speed of the right drive wheel and a drive control unit configured to control driving of the left driving section and the right driving section based on the left speed instruction and the right speed instruction, with using a first control method and a second control method which are provided with different control properties from each other. The drive control unit includes a single mode employing either one of the first control method and the second control method and a composite mode employing the first control mode and the second control mode in time-differentiated combination. In the composite mode, based on a difference between the left speed instruction and the right speed instruction, a combination ratio between the first control method and the second control method is determined.
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公开(公告)号：US20200282972A1
公开(公告)日：2020-09-10
申请号：US16704248
申请日：2019-12-05
申请人： Kubota Corporation
发明人： Yasuhiro Manji
摘要： A work vehicle includes a driving wheel provided in a machine body, a motor for inputting a rotational force to the driving wheel, a traveling control device for acquiring an output instruction for the motor according to an operation of a maneuvering lever, a traveling control unit for controlling driving of the motor in accordance with the output instruction, a battery for reserving energy source for driving the motor, a remaining amount detection section for detecting a remaining amount of the energy source in the battery, and a restriction section for restricting a maximum speed of the machine body to a preset speed irrespectively of the output instruction if the remaining amount of the energy source is equal to or smaller than a preset first threshold value.
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公开(公告)号：US10667464B2
公开(公告)日：2020-06-02
申请号：US15800286
申请日：2017-11-01
申请人： Kubota Corporation
发明人： Yasuhiro Manji , Hirokazu Ito
摘要： 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.
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公开(公告)号：US10602660B2
公开(公告)日：2020-03-31
申请号：US15826781
申请日：2017-11-30
申请人： Kubota Corporation
IPC分类号： A01D34/00 , A01D69/02 , B60L50/50 , A01D34/82 , B60L1/00 , B60L15/00 , B60L15/08 , B60L15/20 , A01D34/66 , A01D101/00
摘要： A work vehicle includes an inverter circuit (42) configured to provide electric current to a traveling motor unit (21, 22) based on an inverter drive signal, a target signal generation unit (51) configured to generate a control target signal for the inverter circuit (42) based on an operation detection signal, an inverter drive signal generation section (41) configured to generate an inverter drive signal based on the control target signal and output the inverter drive signal to the inverter circuit (42), a trouble detection section (53) configured to detect a vehicle trouble based on a state detection signal, and a signal superposition section (56) configured to superpose a pulsatory signal on the control target signal if the trouble detection section (53) detects a vehicle trouble and output a resultant superposed control target signal to the inverter drive signal generation section (41).
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公开(公告)号：US20200014320A1
公开(公告)日：2020-01-09
申请号：US16411433
申请日：2019-05-14
申请人： Kubota Corporation
发明人： Hirokazu Ito , Yasuhiro Manji
摘要： 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.
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公开(公告)号：US10477759B2
公开(公告)日：2019-11-19
申请号：US15835692
申请日：2017-12-08
申请人： Kubota Corporation
IPC分类号： A01D34/00 , A01D34/66 , A01D34/78 , B60L15/20 , B60W30/188 , A01D101/00
摘要： 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.
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公开(公告)号：US20190014718A1
公开(公告)日：2019-01-17
申请号：US16009817
申请日：2018-06-15
申请人： Kubota Corporation
摘要： 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.
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公开(公告)号：US20180338420A1
公开(公告)日：2018-11-29
申请号：US15800286
申请日：2017-11-01
申请人： Kubota Corporation
发明人： Yasuhiro Manji , Hirokazu Ito
IPC分类号： A01D34/78
CPC分类号： A01D34/78 , A01D34/64 , A01D34/661 , A01D34/81 , A01D2034/645
摘要： 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.
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