Yanmar Co., Ltd.

Yanmar Power Technology Co., Inc.

Takahiro Ikeda

Keiichi Nishihara

Masao Nagata

Takafumi Nobayashi

Saizou Kondou

Masami Miyanishi

Yasuyuki Oyamada

Mitsuyuki Hatanaka

Hideki Seino

Takaaki Kuroda

Yoshihiro Miyazaki

A rotary working vehicle includes a lower traveling body, an upper rotating body, a rotating frame constituting the bottom of the upper rotating body, a boom bracket supported by the rotating frame so as to be capable pivoting horizontally, a first vertical plate and a second vertical plate, which are raised from the bottom plate of the rotating frame, a swing cylinder provided on the opposite side of the second vertical plate from the first vertical plate and connecting the rotating frame and the boom bracket, a protrusion piece protruding toward the swing cylinder from a side wall of the second vertical plate above the swing cylinder, a hose guide provided to the protrusion piece, and first and second hydraulic hoses which pass above the first vertical plate and the second vertical plate, extend downward from above through the hose guide, and reach the swing cylinder.

Rotary working vehicle

A rotary working vehicle is provided with: a lower traveling body; an upper rotating body; a rotating frame constituting the bottom of the upper rotating body; a boom bracket supported by the rotating frame so as to be capable pivoting horizontally; a first vertical plate and a second vertical plate, which are raised from the bottom plate of the rotating frame; a swing cylinder provided on the opposite side of the second vertical plate from the first vertical plate and connecting the rotating frame and the boom bracket; a protrusion piece protruding toward the swing cylinder from a side wall of the second vertical plate above the swing cylinder; a hose guide provided to the protrusion piece; and first and second hydraulic hoses which pass above the first vertical plate and the second vertical plate, extend downward from above through the hose guide, and reach the swing cylinder.

In a boomfor a working machineattached to an upper rotational bodysupported on a center of an upper portion of a crawler-type traveling deviceto be transversely rotatable, the boomincludes, as portions cast by integral molding, a boom support point part, a boom cylinder rod support point part, and an arm support point part, and is configured so that the boom support point partis connected to the boom cylinder rod support point partby a general-purpose first rectangular pipe, and so that the boom cylinder rod support point partis connected to the arm support point partby a general-purpose second rectangular pipe

Boom for excavation machine

It is an object of the present invention to provide a cover for a power shovel which can be manufactured at a low cost by reducing the number of parts and production man-hours and can be improved in maintainability. In the power shovelwhich include an upper revolution structure () having: a body frame (), a seat support stand () disposed at the rear of the body frame () and covering an upper part of the engine, and a device frame () disposed on a front part of the body frame () and storing hydraulic devices, side and a rear parts of the seat support stand () and the side part between the device frame () and the body frame () are covered by left and right side-covers () and () and a rear cover ().

Excavating machine

An objective of the present invention is to provide a counterweight of a power shovel interchangeable with that of a superordinate model without affecting a rear end radius of the shovel at the time of rotation. In the power shovelin which the counterweight is formed at the rear part of a vehicle body frameextended from a front end to a rear end of a lower part of a rotation upper body, and an engineis mounted on the rear part of the vehicle body frame, an additional weightis placed in a space between the rear part of the vehicle body frameand the engine

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Chikugo, Japan

Takahiro Ikeda