Komatsu Corporation

Kouya Iizuka

Takao Nagano

Kouichi Watanabe

Hiroshi Yoshida

Hiroaki Inoue

Satoru Nishimura

Takumi Onoda

A construction machine includes an engine unit, a body frame, and mounting portions. The engine unit includes an engine, a hydraulic pump driven by drive force of the engine, and a generator motor disposed between the engine and the hydraulic pump. The generator motor has a rotary shaft connected to an input shaft of the hydraulic pump and to an output shaft of the engine and a first housing fixed on an engine side and a second housing fixed on a hydraulic pump side. The engine is installed on the body frame. The mounting portions are provided to the engine and to the first housing to support the engine unit on the body frame.

Construction machine

In the working machine, first and second pilot flow paths are directly or indirectly connected to a tank flow path (). A first restrictor is disposed between the first pilot flow path and the tank flow path. A second restrictor is disposed between the second pilot flow path and the tank flow path. An actuator control unit is configured to control an actuator based on a hydraulic pressure detected by a first hydraulic pressure detector unit and that detected by a second hydraulic pressure detector unit sensor.

Working machine

A cooling structure of a generator motor includes: a first passage provided to an end side member placed at one end of a housing of a generator motor, the first passage extending toward a rotation center axis of an input/output shaft housed in the housing, the first passage opening to a side of the input/output shaft, and the first passage including a restriction section halfway through; and a second passage provided to the end side member, branching off from the first passage at a position on an outer side in a radial direction of the input/output shaft than the restriction section and subsequently extending toward a rotor attached to an outside of the input/output shaft, and the second passage opening to a side of the rotor.

Cooling structure of generator motor and generator motor

A cooling structure of a generator motor includes: a rotor holder; a rotor core; a first blade; and a second blade, wherein the second blade includes a recessed coolant holding portion, provided on an outer circumference of the second blade on an opposite side to the rotor core and opening inward in the radial direction, for collecting a coolant, and a drain hole radially penetrating an outer circumference of the coolant holding portion for draining the coolant collected in the coolant holding portion.

A timber crusher capable of sufficiently exhibiting an effect of preventing timber pieces from scattering to an outside and also preventing damage to the crusher is provided. To this end, in the timber crusher comprising, on a base, a crusher for crushing timber into pieces and a rotary tub for guiding the timber to the crusher, a hopper ( ) having an upwardly open shell part ( ) and guiding the charged timber to the rotary tub ( ) is provided at an opening of the rotary tub ( ). The hopper ( ) is inclined with respect to the horizontal and is tiltable. Further, the hopper ( ) may be provided with a scattering prevention cover ( ) for preventing timber from scattering to an outside from an inside of the rotary tub ( ).

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Hiratsuka, Japan

Kouya Iizuka