Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery Tierra Co., Ltd.

Kohei Maeda

Junya Kawamoto

Atsushi Ninomiya

Katsumi Usami

Yusuke Daimon

Masayuki Yunoue

Makoto Motozu

Yuuki Umizaki

Masaru Oda

Hitoshi Kimura

Kentaro Kamakura

Tetsuya Sumino

Hydraulic excavator

A controller mounted on a small-sized hydraulic excavator includes an engine restart section that restarts an engine when a horn switch operation determining section determines that a horn switch is operated and a gate lock lever position determining section determines that a gate lock lever is at a lock position in a case where a restart standby time determining section determines that restart standby time does not yet elapse after the engine is automatically stopped by an idling stop function, and a power supply stopping section that stops an electric power supply of a vehicle body when the restart standby time determining section determines that the restart standby time has elapsed.

Construction machine with engine restart section and horn switch and gate lock lever operations

A hydraulic oil tank attachment structure arranged in a construction machine secures the strength of a hydraulic oil tank as well as secures a large capacity thereof. The attachment structure is arranged in a compact excavator provided with a revolving superstructure, a working device attached to the revolving superstructure, a hydraulic actuator including a revolving motor that drives the revolving superstructure and an actuator that drives the working device. A hydraulic oil tank made of synthetic resin, which stores hydraulic oil to be supplied to the hydraulic actuator, is attached on a revolving frame of the revolving superstructure. The hydraulic oil tank attachment structure has a holding member provided with a projecting part formed on a side surface of the tank, which is fixed on the revolving frame of the revolving superstructure so as to surround side surfaces thereof to hold the hydraulic oil tank via the projecting part.

Hydraulic oil tank attachment structure of construction machine

A hydraulic oil tank capable of assuring strength at a gage installation part and bringing a gage close to a hole portion of an exterior cover while maintaining a predetermined clearance between the exterior cover and the hydraulic oil tank is provided. The hydraulic oil tank, mounted on a swing frame of a hydraulic excavator upperstructure, has a side wall opposing an upperstructure exterior cover with a predetermined clearance, and is adapted to store hydraulic oil to be fed to hydraulic actuators. The hydraulic oil tank has a gage enabling a visual check on the hydraulic oil level in the tank through a hole portion in the exterior cover. The gage is installed in the tank side wall, with an internally-hollow protruding portion protruding toward the exterior cover hole portion and a transparent window portion arranged at an end of the protruding portion.

Hydraulic oil tank for construction machine

Growing community of inventors

Tsuchiura, Japan

Kohei Maeda