Takeuchi Mfg. Co., Ltd.

Kengo Kumeuchi

Takahiro Takizawa

Shumpei Okutani

Koichi Shimizu

Yoshihide Shimada

Yuta Kobayashi

Tetsuya Matsumoto

Takahiro Watanabe

Kouichi Shimizu

Motoki Yanaida

Hiroyuki Yamada

Shunpei Okutani

Tomonori Satoh

A working vehicle including a work unit hydraulically driven, a hydraulic pump driven by an electric motor, a power source and a power supply circuit which supply electric power to the electric motor, and a main body supporting them, a first fixation mechanism fixing a first fixation component to the main body includes a first conductor, a first conduction member making the first conductor and the main body electrically conductive to each other, and a second conduction member making the first conductor and the first fixation component electrically conductive to each other, and is configured such that the main body and the first fixation component are electrically conductive to each other via the first conductor and the first and second conduction members and are equal in electric potential, and the main body is electrically conductive and equal in electric potential to a ground pole of the power supply circuit.

Working vehicle

A working control device comprises a hydraulic actuator such as the boom cylinderthe bucket cylinderthe operation devicethat is operated by an operator to drive the hydraulic actuator, a hydraulic oil supply source consisting of the electric motor Mand the hydraulic pump Pthat delivers hydraulic oil required to drive the hydraulic actuator; and a delivery oil amount control device (the controller for controlling rotation of the electric motor) that controls an amount of oil to be delivered from the hydraulic oil supply source in response to an operation of the operation device. The delivery oil amount control device is configured to perform a supplying oil amount control to deliver from the hydraulic oil supply source a required amount of oil for the hydraulic actuator to have a working speed corresponding to the operation of the operation device.

Working control device in working vehicle

There is provided a working vehicle with increased safety by preventing deterioration of a battery due to over-discharge of the battery caused by an operator not noticing occurrence of a malfunction in driving by connected to an external power source. The working vehicle includes a charger, the battery, a sensor, a drive unit, a controller, a display unit, a battery management system, and a switch, in which the battery management system is configured to control the working vehicle to be switched to the driving by connected to the external power source when the switch is turned on after the charger is connected to an external power source and a valid signal for driving by connected to the external power source is received.

An operation control device for a working vehicle comprises a hydraulic actuator to drive the hydraulic working device, operating oil supply source for driving the hydraulic actuator, an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator, an operating device to be operated to make the hydraulic actuator work and a working gain setting device that sets a gain of working speed of the hydraulic actuator corresponding to the operation of the operating device. The operating oil supply control device controls operating oil supply from the operating oil supply source to the hydraulic actuator based on the operation output signal from the operating device and the working speed gain set by the working gain setting device.

Operation control device for working vehicle

There is provided a direct current power supply circuit mounted in a working vehicle with increased safety as compared with related art by a configuration where a main power source is used after a battery management system (BMS) determines that the main power source can be used. A direct current power supply circuit includes a first power source, a switch, a second power source and a first relay, in which the first power source is connected to a battery management system through the first relay so as to supply direct current power, the battery management system is activated by supply of direct current power from the second power source when the switch is turned on, and the first relay is on-controlled when determined that the first power source can be used.

Direct current power supply circuit mounted in working vehicle

An operation control device for a working vehicle which includes a hydraulic working device, comprises a hydraulic actuator to drive the hydraulic working device, an operating oil supply source for driving the hydraulic actuator, a sent-out oil amount control device that controls the amount of oil sent out from the operating oil supply source, an operating device to be operated to make the hydraulic actuator work, and an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator according to operation of the operating device. The sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the operation amount of the operating device.

A hydraulic drive unit of a hydraulic excavator is configured to include a first hydraulic pump (P) that discharges a hydraulic oil for activating a boom cylinder () and the like, a first electric motor (M) that drives the first hydraulic pump (P), a hydraulic pump for revolution (P) that discharges a hydraulic oil for activating a revolution motor (), a second electric motor (M) that drives the hydraulic pump for revolution (P), and a motor control device () that controls the rotation of the first electric motor (M) and that of the second electric motor (M). The motor control device () is configured such that when the revolution of the revolving body is not activated by the revolution motor (), control to deactivate the second electric motor (M) is performed.

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Chikuma, Japan

Kengo Kumeuchi