Hitachi Construction Machinery Co., Ltd.

Komatsu Corporation

Komatsu Zenoah Co.

Other

Komatsu Utility Co., Ltd.

Takaharu Nishimura

Kouhei Urase

Yoshiteru Kubo

Shinichi Senba

Kazuyoshi Yamada

Makoto Motozu

Makoto Sugaya

Kohei Urase

Akira Fukushima

Shougo Kimura

Osamu Watanabe

Seiichiro Takeshita

Akio Ohta

Masashi Kobori

Teruo Irino

Shinichiro Endo

Naohiro Ishikawa

Kenichi Shimizu

Jun Noguchi

Hiroyuki Takayama

Sachio Shimizu

An object of the present invention is to provide a construction machine which precipitates the removal of earth that is churned up onto a vehicle body from the vehicle body, which reduces transfer loads on a blade bracket, which improves the attachability of the blade bracket, and which achieves standardization of the blade bracket. The construction machine according to the present invention is constituted such that a frame of a crawler belt-type traveling body comprises a center frame, a pair of truck frames disposed on the outside of two side portions of the center frame, a connecting member which connects the center frame to the truck frames, and a blade bracket which is joined to the center frame and the connecting member.

Construction machine

In a crawler frame in which legs in a center frame are formed from cast steel, a simple structure is achieved by reducing the number of components. To this end, the crawler frame, which has a center frame composed of a central frame section for supporting a swing bearing and legs located on the right and left sides of the central frame section; and track frames disposed on the sides of the distal ends of the legs, respectively, of the center frame, is designed such that each of the legs is bifurcated into front and rear leg sections and the front and rear leg sections are respectively formed from cast steel.

Crawler frame for construction machine

A construction machine where a load acting on a vehicle body during an operation is transferred to ensure the strength of the vehicle body, thereby improving reliability including welding reliability. In the construction machine, at least one of the height differences between an upper face or a lower face of the center frame at a joining portion between the center frame and the connecting member and an upper face or a lower face of a center joining portion of the connecting member is set respectively at a dimension that is approximately equal to or less than the thickness of an upper face plate or a lower face plate of the center frame.

A construction machine where an operating load is transferred to a location having good rigidity, thereby ensuring the strength of a vehicle body and increasing the load-withstanding strength in relation to running loads. The frame of the lower traveling body of the construction machine comprising a hollow center frame having an upper plate with an attachment ring, a lower plate, and side plates that surrounding sides of the frame and that jut out from the attachment ring, and reinforcing ribs which connect the upper plate to the lower plate in the interior of the center frame beneath the attachment ring.

A construction machine of the present invention is provided, in a compartment formed by a cover, with an engine, a centrifugal fan, and a heat exchanger for exchanging heat between cooling air blown by the centrifugal fan and a specified medium, wherein the centrifugal fan and the heat exchanger are arranged further upstream than the engine with respect to flow of cooling air, so that cooling air sucked in by the centrifugal fan is led to the engine after passing through the heat exchanger.

A revolving construction machine includes a lower track structure, an upper revolving structure mounted on the lower track structure and a working device mounted to the front of the upper revolving structure. A floor panel portion is provided on the upper revolving structure. A walk-through passageway is defined by a left-hand floor panel portion, a left side portion of a cabin cover and a left-hand cover of an engine cover for allowing a person to walk through the construction machine in the front and rear directions by passing the left side of an operator's seat, the cabin cover and the engine cover.

Revolving construction machine

Swing type hydraulic excavator

Growing community of inventors

Shiga, Japan

Takaharu Nishimura