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公开(公告)号：US09731624B2
公开(公告)日：2017-08-15
申请号：US15265934
申请日：2016-09-15
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yuichiro Morita , Shigeyuki Yoshihara , Kazuo Ishida , Noritaka Ito , Hirofumi Shimada
IPC: H02P23/00 , B60L15/08 , B60T7/02 , B60T7/12 , B60T8/88 , B60L3/00 , B60L3/04 , B60L11/00 , B60L11/08 , E02F9/20 , B60L15/20 , H02P27/08
CPC classification number: B60L15/08 , B60L3/0023 , B60L3/0084 , B60L3/04 , B60L11/005 , B60L11/08 , B60L15/2009 , B60L2200/40 , B60L2210/40 , B60L2240/30 , B60L2240/80 , B60T7/02 , B60T7/12 , B60T8/885 , E02F9/207 , H02P27/08 , Y02T10/70 , Y02T10/7022 , Y02T10/7077 , Y02T10/7241 , Y02T10/7258 , Y10S903/906
Abstract: An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.
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公开(公告)号：US09556590B2
公开(公告)日：2017-01-31
申请号：US14405407
申请日：2013-06-03
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hidekazu Moriki , Satoru Kaneko , Noritaka Itou , Kazuo Ishida , Toshio Kotaka , Satoshi Sekino , Toru Kikuchi , Masaki Higurashi
CPC classification number: E02F9/2062 , B60K6/46 , B60W10/30 , B60W30/18172 , B60W2510/30 , E02F3/283 , E02F3/431 , E02F9/2066 , E02F9/22 , E02F9/2253 , E02F9/2296 , E02F9/268 , F15B2211/864 , F15B2211/875 , Y02T10/6217
Abstract: This invention includes a hydraulic pump (9), a working implement (107) having a lift cylinder (13) driven by a hydraulic fluid supplied from the hydraulic pump (9), an operating device (104) for operating the working implement (107), a traveling motor (7) for driving wheels, and a main controller (100). When the lift cylinder (13) fails to operate despite an extending instruction being imparted to the lift cylinder (13) via the operating device (104), the main controller (100) reduces a limit value for an increase rate of a torque required in the traveling motor (7) to a value smaller than that applied when the lift cylinder (13) operates. With this configuration, occurrence of wheel slip during lifting of an object to be carried can be reduced.
Abstract translation: 本发明包括液压泵（9），具有由从液压泵（9）供应的液压油驱动的提升缸（13）的作业工具（107），用于操作工作工具（107）的操作装置（104） ），用于驱动车轮的行进马达（7）和主控制器（100）。 当提升缸（13）经由操作装置（104）被赋予提升缸（13）的扩展指令时不能操作时，主控制器（100）减小了对于提升缸（13）所需的扭矩的增加速度的限制值 所述行驶马达（7）的值小于当所述提升缸（13）运转时施加的值。 利用这种构造，可以减少在抬起被承载物体时发生车轮打滑。
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公开(公告)号：US11035099B2
公开(公告)日：2021-06-15
申请号：US16085402
申请日：2017-09-08
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Shota Kimura , Tadashi Osaka , Hidekazu Moriki , Kazuo Ishida , Noritaka Itou
Abstract: A wheel loader includes a working device, a lift cylinder 152 which is a hydraulic actuator that drives the working device, a hydraulic pump 220 that supplies hydraulic oil to the lift cylinder 152, a lift cylinder bottom pressure detector 252 that detects a pressure of the lift cylinder 152, a control valve 221 that controls the amount of hydraulic oil to be supplied from the hydraulic pump 220 to the lift cylinder 152, a vehicle acceleration detector 254 that detects a vehicle acceleration in a longitudinal direction, and a control device 240. The control device 240 determines whether the working device has started excavation, or not, based on the lift cylinder bottom pressure detected by the lift cylinder bottom pressure detector 252 and the vehicle acceleration detected by the vehicle acceleration detector 254.
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公开(公告)号：US10669696B2
公开(公告)日：2020-06-02
申请号：US16096559
申请日：2017-09-27
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Kazuya Takeda , Hiroki Gotou , Kazuo Ishida , Yoshihiko Nakazawa
IPC: E02F9/22 , F16H61/40 , E02F9/20 , F16H61/4008
Abstract: In a work vehicle provided with: a working device including an arm and a bucket; a vehicle speed detection device that detects a vehicle speed; a travel drive device that outputs a travel driving force increasing in response to a decrease in the vehicle speed at a time of excavation; and a control device that controls the travel driving force by the travel drive device, the control device is characterized by including a limit control section that limits the travel driving force during a specified time which passes from when the vehicle speed detected by the vehicle speed detection device becomes a predetermined first vehicle speed threshold value or less and the work vehicle plunges into an object to be excavated until an operation of the working device is started.
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Patent Agency Ranking
公开(公告)号：US20150139767A1
公开(公告)日：2015-05-21
申请号：US14405407
申请日：2013-06-03
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hidekazu Moriki , Satoru Kaneko , Noritaka Itou , Kazuo Ishida , Toshio Kotaka , Satoshi Sekino , Toru Kikuchi , Masaki Higurashi
CPC classification number: E02F9/2062 , B60K6/46 , B60W10/30 , B60W30/18172 , B60W2510/30 , E02F3/283 , E02F3/431 , E02F9/2066 , E02F9/22 , E02F9/2253 , E02F9/2296 , E02F9/268 , F15B2211/864 , F15B2211/875 , Y02T10/6217
Abstract: This invention includes a hydraulic pump (9), a working implement (107) having a lift cylinder (13) driven by a hydraulic fluid supplied from the hydraulic pump (9), an operating device (104) for operating the working implement (107), a traveling motor (7) for driving wheels, and a main controller (100). When the lift cylinder (13) fails to operate despite an extending instruction being imparted to the lift cylinder (13) via the operating device (104), the main controller (100) reduces a limit value for an increase rate of a torque required in the traveling motor (7) to a value smaller than that applied when the lift cylinder (13) operates. With this configuration, occurrence of wheel slip during lifting of an object to be carried can be reduced.
Abstract translation: 本发明包括液压泵（9），具有由从液压泵（9）供应的液压油驱动的提升缸（13）的作业工具（107），用于操作工作工具（107）的操作装置（104） ），用于驱动车轮的行进马达（7）和主控制器（100）。 当提升缸（13）经由操作装置（104）被赋予提升缸（13）的扩展指令时不能操作时，主控制器（100）减小了对于提升缸（13）所需的扭矩的增加率的限制值 所述行驶马达（7）的值小于当所述提升缸（13）运转时施加的值。 利用这种构造，可以减少在抬起被承载物体时发生车轮打滑。
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公开(公告)号：USD999792S1
公开(公告)日：2023-09-26
申请号：US29789961
申请日：2021-10-27
Applicant: Hitachi Construction Machinery Co., Ltd.
Designer： Katsumi Usami , Atsushi Ninomiya , Yusuke Daimon , Masaru Oda , Kazuo Ishida , Yoshihiro Itou , Shoroku Kawahara
Abstract: FIG. 1 is a first perspective view of a cabin for construction machine showing our new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.-
公开(公告)号：US10801183B2
公开(公告)日：2020-10-13
申请号：US15753806
申请日：2017-03-02
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Kazuya Takeda , Isamu Aoki , Kazuo Ishida
IPC: E02F9/22 , F16H61/433 , F02D29/02 , F02D29/04 , F16H61/478 , B60K20/00 , E02F9/20 , F04B17/03 , F04B49/06 , E02F3/34 , F16D23/00 , E02F3/43
Abstract: The work vehicle includes: a clutch device including a forward-travel clutch and a backward-travel clutch configured to cause, when being in an engagement state, the work vehicle to travel in a forward travel direction and a backward travel direction; a forward-backward travel instruction device configured to instruct the work vehicle to travel in the forward travel direction or the backward travel direction; a clutch state detection device configured to detect whether the forward-travel clutch and the backward-travel clutch are each in the engagement state; and a torque restriction section configured to restrict a maximum absorbing torque of the hydraulic pump to be low when a restriction condition holds, the restriction condition including a condition that a traveling direction of the work vehicle, which corresponds to an engagement state of the clutch device, and a traveling direction of the work vehicle, which is instructed by the forward-backward travel instruction device are opposite to each other.
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公开(公告)号：US09457688B2
公开(公告)日：2016-10-04
申请号：US14425328
申请日：2013-09-06
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yuichiro Morita , Shigeyuki Yoshihara , Kazuo Ishida , Noritaka Ito , Hirofumi Shimada
IPC: G05B11/28 , B60L15/08 , B60T7/02 , B60T7/12 , B60T8/88 , B60L3/00 , B60L3/04 , B60L11/00 , B60L11/08 , E02F9/20 , B60L15/20 , H02P27/08
CPC classification number: B60L15/08 , B60L3/0023 , B60L3/0084 , B60L3/04 , B60L11/005 , B60L11/08 , B60L15/2009 , B60L2200/40 , B60L2210/40 , B60L2240/30 , B60L2240/80 , B60T7/02 , B60T7/12 , B60T8/885 , E02F9/207 , H02P27/08 , Y02T10/70 , Y02T10/7022 , Y02T10/7077 , Y02T10/7241 , Y02T10/7258 , Y10S903/906
Abstract: An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver circuit the PWM signal for controlling the driving of the motor, a parking brake, and a parking brake condition detector that detects the condition of the parking brake. When it is detected that the parking brake has been operated, the pre-driver circuit cuts off the output of the gate signal or the input of the PWM signal to the pre-driver circuit.
Abstract translation: 电动驱动轮型作业车具有行驶马达，用于向马达提供从直流电源转换的三相电力的逆变器，用于根据输入的PWM信号向逆变器提供门信号的预驱动电路， 用于向前驱动电路输出用于控制电动机的驱动的PWM信号，驻车制动器和检测驻车制动器的状态的驻车制动状况检测器的控制器。 当检测到驻车制动器被操作时，预驱动器电路将门信号的输出或PWM信号的输入切断到预驱动器电路。
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公开(公告)号：US20150224895A1
公开(公告)日：2015-08-13
申请号：US14425328
申请日：2013-09-06
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Yuichiro Morita , Shigeyuki Yoshihara , Kazuo Ishida , Noritaka Ito , Hirofumi Shimada
CPC classification number: B60L15/08 , B60L3/0023 , B60L3/0084 , B60L3/04 , B60L11/005 , B60L11/08 , B60L15/2009 , B60L2200/40 , B60L2210/40 , B60L2240/30 , B60L2240/80 , B60T7/02 , B60T7/12 , B60T8/885 , E02F9/207 , H02P27/08 , Y02T10/70 , Y02T10/7022 , Y02T10/7077 , Y02T10/7241 , Y02T10/7258 , Y10S903/906
Abstract: An electric driving wheel type work vehicle has a traveling motor 21, an inverter 313 for supplying the motor with three-phase power converted from DC power, a pre-driver circuit 312 for supplying a gate signal 316 to the inverter 313 on the basis of an input PWM signal, a controller 311 for outputting to the pre-driver circuit the PWM signal 315 for controlling the driving of the motor 21, parking brake means 10, and parking brake condition detection means 12 that detects the condition of the parking brake means 10. When the parking brake condition detection means 12 detects the parking brake means 10 has been operated, the pre-driver circuit 312 cuts off the output of the gate signal 316, or the input of the PWM to the pre-driver circuit 312 is cut off.
Abstract translation: 电动驱动轮式作业车辆具有行驶马达21，用于向马达提供从直流电源转换的三相电力的逆变器313，用于基于以下方式向逆变器313提供门信号316的预驱动电路312 输入PWM信号;控制器311，用于向前驱动电路输出用于控制马达21的驱动的PWM信号315，驻车制动装置10以及检测驻车制动装置的状态的驻车制动条件检测装置12 当停车制动条件检测装置12检测到驻车制动装置10已经被操作时，预驱动器电路312切断门信号316的输出，或PWM到预驱动电路312的输入是 隔断。
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