Hitachi Construction Machinery Co., Ltd.

Hitomi Ooshima

Tomohiko Yasuda

Takayuki Satou

Atsushi Kitaguchi

Kazunori Ishihara

Yasuki Kita

Yoshifumi Nabeshima

Takashi Sasaki

Takehito Ikema

Kenji Sato

Shingo Nakamura

An electric drive vehicle provided with a current collecting device, the current collecting device including: a framework having an underframe, a lower frame that is pivotably linked to the underframe, and an upper frame that is pivotably linked to the lower frame; a current collecting portion that is supported by the upper frame; and a lock mechanism that holds the framework in a predetermined posture, in which the framework is capable of moving up and down between a standing posture in which the current collecting portion is ascended and a folded posture in which the current collecting portion is descended, and the lock mechanism includes an adsorption plate made of a magnetic material provided in the upper frame, and a hook device which is equipped with an electromagnet and adsorbs to hold the adsorption plate by a magnetic force to hold the framework in the folded posture.

Electric drive vehicle

Disclosed is a body structure for a dump truck () having a body frame (). The body structure is provided with hinge pins () to be located toward a rear of the body frame, a body (A) to be tiltably disposed on the body frame via the hinge pins and to be adapted to load payload (), and stiffening members arranged on outer surfaces of the body. The body is constructed at least of a floor board (), a front board (), side boards (), and a canopy (). The stiffening members include side-board stiffeners () connecting upper portions of elongated joints between the side boards and the front board to portions of elongated joints between the side boards and the floor board. The latter portions are located rearward of positions laterally corresponding to a barycentric position (G) of the payload () in a longitudinal direction of the body.

Body structure for dump truck

A body for a dump truck includes a body frame, a bottom wall, front wall, and left and right side walls arranged on the body frame. The body also includes an earth/sand anti-sticking device and a steel member arranged outside and opposite the earth/sand anti-sticking device such that a space is formed between the steel member and the earth/sand anti-sticking device. The body is provided with at least one steel rib arranged in the space, fixedly secured to the steel member to reinforce the steel member, and arranged extending upright toward the earth/sand anti-sticking device. The steel member is any one of the bottom wall, front wall, and left and right walls, and the steel rib is shaped to divide the space.

Body for dump truck

A body for a dump truck includes a body frame, a bottom wall, front wall and left and right side walls arranged on the body frame. The bottom wall, front wall and left and right side walls define a payload section for loading a payload, an earth/sand anti-sticking device is arranged in a corner part of the payload section to prevent earth or sand from sticking in the corner part. A steel member is arranged outside and opposite to the earth/sand anti-sticking device such that a space is formed between the steel member and the earth/sand anti-sticking device. The body includes at least one steel rib having a ridge extending out from a surface of a plate that forms the earth/sand anti-sticking device, the ridge is fixedly secured by welding to the plate that forms the earth/sand anti-sticking device.

Growing community of inventors

Tsuchiura, Japan

Hitomi Ooshima