Kubota Corporation

Yukifumi Yamanaka

Go Takaki

Sumio Yagyu

Shunsuke Miyashita

Daiki Tamba

Takahiro Takaki

Fumitake Okunishi

Kozo Nishikawa

Takahiro Uchi

Seiji Norita

Seiji Ohkubo

Yuji Kato

Takashi Okuyama

Takao Nakagawa

Masaru Kawane

Junichi Ishikawa

Minoru Hiraoka

Takashi Uchida

Yuki Shimoike

Masatoshi Sakai

Masaaki Nishinaka

Yusuke Ida

Takahito Matsumori

Yuma Ikeda

Ryota Yamagishi

Katsutoshi Jinnouchi

Ryota Niki

Yuhei Hazawa

Kaichiro Yoshii

Taichi Okumura

Tomohiro Shimazaki

A work machine includes a front wheel, a rear wheel, an intermediate wheel between the front wheel and the rear wheel, and a transmission to receive a driving force from a drive source and transmit the driving force to the intermediate wheel and at least one of the front wheel or the rear wheel that is drivable as a driving wheel. The intermediate wheel has an outside diameter smaller than an outside diameter of the driving wheel.

Work machine

The working machine includes a machine body, an engine provided on the machine body, a motor generator to be operated as a motor to assist driving of the engine in an assisting operation and to be operated as a generator by power of the engine to generate electricity in a generating operation, a battery to store the electricity generated by the motor generator, an acceleration sensor to measure acceleration of the machine body, and a controller to selectively set either one of the assisting operation and the generating operation based on the acceleration of the machine body measured by the acceleration sensor.

Working machine

A tractor including a vehicle body, a hood at a front portion of the vehicle body, a traveling device to support the vehicle body so that the vehicle body is capable of traveling, a driving motor to drive the traveling device, a PTO shaft to transmit power to a working machine, a fuel cell system including a fuel cell and operable to supply electricity generated by the fuel cell to the driving motor, and a battery to store electricity generated by the fuel cell. The fuel cell and the battery are disposed inside the hood.

Hydrogen supply system, fuel cell system, and working machine including hydrogen supply system and fuel cell system

A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a working device to function using power from the engine and the motor/generator, a work operation actuator for operation of the working device, an action controller to cause the assisting action to be performed when a rotation speed of the engine is equal to or less than a first rotation speed and cause the electricity generating action to be performed when the rotation speed of the engine is equal to or greater than a second rotation speed greater than the first rotation speed, and a speed controller to change the first rotation speed or the second rotation speed according to an operation amount of the work operation actuator.

A working machine includes a machine body, an engine on the machine body, a motor/generator to perform an assisting action in which the motor/generator functions as a motor to assist the engine in driving and an electricity generating action in which the motor/generator functions as a generator to generate electricity using power from the engine, a battery to store electricity generated by the motor/generator, an operation actuator to perform an operation of the machine body, a starting action determiner to determine, upon operation of the operation actuator, whether the operation corresponds to a starting action for the machine body, a first setter to set, if the starting action determiner determines that the operation of the operation actuator corresponds to the starting action, a torque of the motor/generator for the assisting action or the electricity generating action to a first torque, and a second setter to set, if the starting action determiner determines that the operation of the operation actuator does not correspond to the starting action, the torque for the assisting action or the electricity generating action to a second torque differing from the first torque set by the first setter.

A fuel cell system includes a hydrogen tank to store hydrogen, a fuel cell to receive hydrogen gas from the hydrogen tank to generate electricity, a temperature controller to adjust a temperature inside the hydrogen tank, and a control unit to control the temperature controller based on the amount of hydrogen remaining in the hydrogen tank, the control unit being configured to increase the temperature inside the hydrogen tank when the amount of the remaining hydrogen is equal to or less than a first predetermined value.

Fuel cell system, working machine including the same, and method of controlling fuel cell system

A hydrogen supply system that supplies hydrogen gas to a fuel cell and causes the fuel cell to generate electricity includes a plurality of hydrogen tanks that each store hydrogen gas, and a hydrogen gas supply path that supplies the hydrogen gas to the fuel cell from each of the plurality of hydrogen tanks. At least one hydrogen tank of the plurality of hydrogen tanks is a first reserve tank that is connected to a hydrogen gas collecting pipe or a hydrogen gas recovery pipe, and that stores hydrogen gas that was not used in generating electricity in the fuel cell.

A working device to be connected to a traveling vehicle having a prime mover, the working device being configured to perform an agricultural work, includes a working portion to rotate to perform an agricultural work, an electric motor to be driven by electric power, a power transmission mechanism to which power generated by the electric motor is inputted, configured to transmit the power to the working portion; and a regeneration resistor to consume a regenerative power generated in the electric motor, the regeneration resistor being arranged at a position to be cooled by wind generated by rotation of the working portion.

Working device and working machine having the same

A spraying support system for a working machine, includes: a support device including a plan creator portion to create a spraying plan representing a relation between field information relating to a field to which spray substance is sprayed and spraying information including spraying amount of the spray substance; a plan obtainer device provided to a working machine having a sprayer device to spray the spray substance and configured to obtain the spraying plan created by the plan creator portion; and a spraying controller device to control a sprayer portion of the sprayer device based on the spraying information of the spraying plan obtained by the plan obtainer device.

Spraying support system for working machine

A generator unit to be attached to a traveling vehicle that has a prime mover and a PTO shaft to transmit power from the prime mover, includes: a generator; an input shaft having: a first connector portion configured to be connected to the PTO shaft; and a second connector portion configured to be connected to a working device to be connected to the traveling vehicle; a transmitter mechanism to transmit, to the generator, power supplied from the PTO shaft, the power being inputted from the first connector portion to the input shaft; and an attachment frame having: an attachment portion to which the generator, the input shaft, and the transmitter mechanism are attached; and a mounting portion configured to be mounted to the traveling vehicle.

Generator unit and working machine

A working machine includes: a first generator having: a rotor to be rotated by power from a PTO shaft; a rotor coil provided to the rotor; and a stator coil to generate electricity when magnetizing current is applied to the rotor coil; a working device to be operated by the electricity generated by the first generator; and a converter device to convert surplus electricity not consumed by the working device into the magnetizing current to be applied to the rotor coil.

Power system for a work vehicle

A working device connected to a traveling vehicle having a prime mover and configured to perform an agricultural work, includes: a working portion to perform an agricultural work; an electric motor to be driven by electric power; a power transmission mechanism to which power generated by the electric motor is inputted, configured to transmit the power to the working portion; a regeneration resistor to consume a regenerative power generated in the electric motor; a switch portion to switch, between a connecting state and a shut-off state, a state established between the electric motor and the regeneration resistor; and a controller portion to control driving of the electric motor and switching of the switch portion.

A plug-in hybrid work vehicle includes a first battery charged from an on-board electric generator, a second battery charged from an external electric power source, a charging switch, a DC-to-DC converter, a voltage determination unit, and a charging control unit. During charging from the external electric power source, the charging control unit charges the second battery from the external electric power source when the voltage determination unit determines that the voltage of the first battery exceeds a reference voltage value necessary for starting an engine, and charges the first battery from the external electric power source via the DC-to-DC converter and the like, in preference to charging of the second battery, when the voltage determination unit determines that the voltage of the first battery is equal to or lower than the reference voltage value.

Work vehicle and display device for the work vehicle

A work vehicle includes an assist motor that is located opposite an engine with respect to a continuously variable transmission device. The assist motor has an output shaft that extends coaxially with a drive shaft of the continuously variable transmission device and is interlocked with the drive shaft. A motor support platform that supports the assist motor protrudes more outward than the continuously variable transmission device does in a lateral direction relative to a vehicle body. The motor support platform includes a slide movement mechanism, and the slide movement mechanism is configured to change the position at which the assist motor is attached, relative to the continuously variable transmission device, axially of the drive shaft, between a connected position and a disconnected position of the drive shaft and the output shaft.

Work vehicle

A work vehicle includes a propelling device, which consists of a pair of right and left front wheels and a pair of right and left rear wheels, an engine configured to drive one of the pair of front wheels and the pair of rear wheels, an electric motor configured to drive the other of the pair of front wheels and the pair of rear wheels, a battery configured to supply electric power to the electric motor, and a controller configured to control the electric motor. The controller performs regeneration control at constant current value to charge the battery with regenerative power of the electric motor at a constant current value regardless of rotation speed of the electric motor.

Growing community of inventors

Sakai, Japan

Yukifumi Yamanaka