Komatsu Corporation

Tatsushi Itou

Tadashi Mori

Tetsuo Ohnishi

Akihide Namura

Hiroyuki Shioji

Yuuki Kasaoka

Shouhei Nagasaka

Koudou Tsuji

Eiji Nabata

Yu Ninomiya

Yasuyuki Akita

Taiki Ogura

Yoshinori Saeki

Yuuta Sakurai

Hirofumi Takanuki

A determination method is for an exhaust gas treatment device mounted in a work machine and having at least one of a diesel oxidation catalyst and a catalyzed soot filter. The determination method includes acquiring heat damage information, acquiring cumulative heat damage information, and determining a usability of the exhaust gas treatment device based on the cumulative heat damage information. The heat damage information indicates an extent of heat damage of the exhaust gas treatment device based on a unique identification symbol of the exhaust gas treatment device. The cumulative heat damage information is acquired by accumulating the heat damage information.

Determination method for exhaust gas treatment device and determination system for exhaust gas treatment device

The hydraulic excavator capable of accurately positioning an engine and an exhaust gas treatment unit is provided. The hydraulic excavator includes a engine, an exhaust gas treatment unit, a front left pillar portion, a rear left pillar portion, a plurality of support portions, and a center frame. The exhaust gas treatment unit treats an exhaust gas from the engine. The plurality of support portions support the exhaust gas treatment unit. The center frame carries the engine. The center frame has a vertical plate. Two support portions are fixed to the vertical plate.

Hydraulic excavator

A method of manufacturing a branched pipe includes: a first swelling step of swelling a swelled part from a main body of a pipe blank by pressurizing the inner surface of the pipe blank by an elastic body, and simultaneously, forming an opening in the tip portion of the swelled part along a circumferential direction; and a second swelling step of swelling the swelled part from the main body by pressurizing the inner surface of the pipe blank by the elastic body.

Method for manufacturing branched pipe and branched pipe manufacturing device

A hydraulic oil tank has a housing, a connecting member and a filtering device. The housing includes a main body, a storage compartment and a first through hole. The storage compartment is formed within the main body for containing a the hydraulic oil, and the first through hole is formed through the main body. The connecting member is disposed on the main body and covering the first through hole, the connecting member including a contact face having a planar shape. The filtering device is disposed within the storage compartment. The filtering device is connected to a part of the contact face exposed within the first through hole. The filtering device includes an overlapped portion overlapping with an inner edge of the first through hole in a plan view of the first through hole seen from inside of the storage compartment.

Hydraulic oil tank, hydraulic oil tank manufacturing method and construction vehicle equipped with hydraulic oil tank

An exhaust processing device includes a main body tube portion and a closing tube portion. The main body tube portion includes an opening in an axial end thereof, houses a main body exhaust path in an inside thereof, which allows an exhaust gas to pass therethrough. The closing tube portion includes a plate portion and a tubular portion. The plate portion covers the opening of the axial end of the main body tube portion. The tubular portion radially outwardly protrudes from an outer peripheral surface of the main body tube portion, and is integrated with the plate portion. The tubular portion houses an exhaust path in an inside thereof, which communicates with the main body exhaust path. The tubular portion of the closing tube portion includes a first split half portion integrally molded with the plate portion, and a second split half portion joined to the first split half portion.

Exhaust processing device and manufacturing method thereof

A work equipment boom is adapted to be attached at one end to a main body of a construction machine and attached at the other end to a work equipment arm. the work equipment boom includes a boom main component. The boom main component is integrally formed by expanding a tubular material. The boom main component has a proximal end portion and a distal end portion. The proximal end portion includes a first end part arranged to be disposed adjacent to the main body and has a shape which increases in horizontal width as it gets nearer to the first end part. The distal end portion includes a second end part arranged to be disposed adjacent to the work equipment arm and has a shape which increases in horizontal width as it gets nearer to the second end part.

Work equipment boom

The invention provides a driver's cab for a work vehicle which is provided with a function of effectively transferring an external force applied to a ceiling portion to a pillar without making a structure complex, and can achieve a reinforced structure. In a driver's cab () in a working vehicle, the driver's cab being structured by a pipe-like member, a connection member (()) for dispersing a stress is arranged in a support pillar (()) in an opposite side particularly in the case that an external force is applied to a transverse outer side of a ceiling portion.

Growing community of inventors

Hirakata, Japan

Tatsushi Itou