Kawasaki Jukogyo Kabushiki Kaisha

Yukito Imamura

Masahiro Yamada

Tadashi Anada

Masahiro Suzuki

Hideki Tanaka

Ryo Yamamoto

Keita Morikawa

Noriaki Takakura

Kenjirou Hara

Toru Morita

Masamichi Maruyama

A spool valve device includes: a housing with channels; a spool moving to change channel connection statuses; an electric actuator including an electric motor and linear-motion conversion mechanism, the motor rotating an output shaft by torque corresponding to a drive current supplied to the motor, the mechanism converting rotational output shaft movement into straight movement and applying thrust corresponding to the torque to the spool to change position; a biasing member applying biasing force to the spool against the actuator thrust; an angle detector detecting an motor output shaft angular position; a driving portion driving the motor by controlling drive current flow supplied to the motor based on a position command input and the angular position detected by the angle detector; and an abnormality determining portion calculating the spool position based on the detected angular position and determine presence or absence of operation spool abnormality.

Spool valve device and spool valve

An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.

Electro-hydraulic drive system for a work machine

An electric double-layer capacitor, which provides enhanced heat release-ability with a simple configuration ensuring vibration resistance and impact resistance and to improve durability in a severe marginal environment, is provided. The electric double-layer capacitor includes capacitor cells; a pair of end plates, respectively disposed on both sides of a plurality of parallelly arranged capacitor cells; a metallic case for housing the end plates, a plurality of capacitor cells; and an insulating resin, filling the interior of the metallic case to cover the end plates, a plurality of capacitor cells and lead terminals, wherein the electric double-layer capacitor further includes an external connecting terminal having two end sections, one of the end sections being disposed in the end plate within the insulating resin, and wherein the lead terminal of the capacitor cell disposed adjacent to the end plate is configured to be connected to the one of the end sections of the external connecting terminal.

Electric double-layer capacitor

An electricity-oil hybrid motorincludes an oil-pressure motorand an electric motor. The electricity-oil hybrid motorincludes a rotating shaftand causes the rotating shaftto rotate by supplied operating oil. The electric motorincludes a rotorconnected to the rotating shaft, a statorprovided around the rotor, and a housingin which the rotorand the statorare accommodated. The rotorand the housingare provided so as to surround and cover a casingof the oil-pressure motor. The housingincludes a rotating shaft accommodating spacein which the rotating shaftis accommodated and a stator accommodating spacein which the stator is accommodated. A sealing memberconfigured to separate the accommodating spacesandis provided in the housing

Electricity-liquid hybrid liquid-pressure apparatus

Growing community of inventors

Kobe, Japan

Yukito Imamura