Kubota Corporation

Yasuhiro Manji

Hirokazu Ito

Kazuaki Matsuda

Katsuhiko Uemura

Kazuo Koike

Ryo Ikeda

Masahiro Yamada

Tomohiko Hisakuni

Nozomu Akiyama

Yuto Akai

Yu Hayashi

An object of the present invention is to provide a work vehicle that can be controlled automatically. The work vehicle includes HST's for feeding power for traveling to at least either front wheels or rear wheels mounted on a traveling vehicle body, traveling levers for operating driving of at least either the front wheels or the rear wheel, traveling links operably coupling the traveling levers with the HST's, traveling drive sections for driving either the traveling levers or the traveling links, and a traveling control section configured to activate the traveling drive sections in response to receipt of a traveling instruction for the traveling levers in the automatic control mode for automatically controlling the traveling vehicle body.

Work vehicle and grass mowing machine

A self-driving work vehicle includes: a front wheel unit; a rear wheel unit including a left rear wheel and a right rear wheel; a variable traveling power supply apparatus that supplies rotational drive power to the left rear wheel and the right rear wheel independently; a left operation implement movable along a first path to adjust a rate of the rotational drive power to be supplied to the left rear wheel from the variable traveling power supply apparatus; a right operation implement movable along a second path to adjust a rate of the rotational drive power to be supplied to the right rear wheel from the variable traveling power supply apparatus; a parking brake provided for the variable traveling power supply apparatus; and a controller configured or programmed to cause a parking brake operating module to operate the parking brake.

Work vehicle

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.

Electric work vehicle and mower unit

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. The controller is configured or programmed to control the parking brake to a braking state or a non-braking state by a parking brake control module, and 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 are operating states of the parking brake.

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.

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.

Provided is an electric power control device that allows a work vehicle to travel while carrying out a utility work smoothly. An electric power control device includes an operational state information acquisition section for acquiring operational state information indicative of an operational state of a work vehicle, a battery information acquisition section for acquiring battery information indicative of a state of a battery which is mounted on the work vehicle, a storage section for storing in advance operational mode information, a travel unit that causes the work vehicle to travel, a distributed electric power calculation section for calculating distributed electric powers to be distributed to the travel unit and an implement unit that effects the utility work respectively, and an instruction section for instructing the distributed electric powers to a travel control section that controls the travel unit and an implement control section that controls the implement unit, respectively.

Electric power control device

A work vehicle includes a first detection unit that detects an optical beam emitted from a beam projector disposed at one end of a reference travel path, a first position deviation calculation section that calculates position deviation by a vehicle body from the reference travel path based on a detection signal from the first detection unit, a second detection unit that detects a work boundary line that occurs due to work travel, a second position deviation calculation section that calculates position deviation of the vehicle body traveling along successive travel paths from the work boundary line based on a detection signal from the second detection unit, and a steering information generation section that, based on the position deviation calculated by the first position deviation calculation section and the second position deviation calculation section, generates steering information for correcting the position deviation.

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.

Electric work vehicle

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.

Electric travelling vehicle and grass mower

An electric work vehicle includes: a battery pack that is arranged between a left rear wheel arranged outside of a left frame and a right rear wheel arranged outside of a right frame, the front end of the battery pack being located forward of an axle center of a rear wheel unit; a left motor that is arranged above the battery pack, in the periphery of the left rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the left rear wheel; and a right motor that is arranged above the battery pack, in the periphery of the right rear wheel, receives a supply of power from the battery pack, and transmits rotational power to the right rear wheel.

Electric work vehicle, battery pack for electric work vehicle and contactless charging system

A mower unitincludes 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 motorhaving a rotordisposed upward and a coildisposed downward along an axial direction of an output shaft, a mount deckhaving a horizontal mounting face for mounting the mower motorin such a manner that the output shaftassumes a vertical posture, the mount deck protruding outwards from a side wall of the mower deck, and a cooling arrangementincorporated in the mound deckfor discharging heat of the mower motor

Mower unit for heat discharge and soundproofing

Provided is a traveling control device capable of appropriately controlling the turning and the speed of a traveling vehicle. The traveling control device 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; an operation instruction determination portion that determines whether the operation instruction is an operation instruction to rotate the pair of driving wheels in the same direction or an operation instruction to rotate the pair of driving wheels in different directions; and a speed instruction value correction portion that corrects, if the operation instruction is an operation instruction to rotate the pair of driving wheels in the same direction, one of the speed instruction values, based on the other speed instruction value.

Traveling control device

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.

Growing community of inventors

Sakai, Japan

Yasuhiro Manji