Komatsu Corporation

Tetsuo Ohnishi

Takemori Takayama

Yoshikiyo Tanaka

Kazuo Okamura

Kan'ichi Sato

Keiichi Maeda

Tatsushi Itou

Yuuki Kasaoka

Yu Ninomiya

Yuuta Sakurai

Masao Nishimura

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

A sintered sliding member comprises a back metal () and a ferrous sintered sliding body () which is sintering-bonded to the back metal (). The ferrous sintered sliding body () has martensite phase having a solid soluble carbon concentration of 0.15 to 0.5 wt % and contains carbide in a content of 5 to 50% by volume. The sintered sliding member is excellent in abrasion resistance, seizing resistance and heat crack resistance.

Sintered sliding member and connecting device

To provide a thermal spray membrane contact material, contact member and contact part and an apparatus to which they are applied, showing excellent seizure resistance and wear resistance even under high surface pressure/low speed sliding, high speed/high temperature sliding, or high surface pressure/high speed sliding. In a bucket connecting apparatus connecting an arm and a bucket by a work implement connecting pin, the above-mentioned work implement connecting pin comprises a base material made of steel having an axis function and a contact surface formed of a thermal spray membrane contact material film-formed on the base material, said contact surface being placed at least on a supported surface site of the work implement connecting pin relative to a bracket and on a slipping contact surface with a work implement bushing, further, said thermal spray membrane contact material being composed of a Mo metal phase, or 10 vol % or more of a Mo metal phase and a metal phase and/or alloy phase containing one or more elements selected from the group consisting of Fe, Ni, Co, Cr, Cu and Zn.

Thermal spray membrane contact material, contact member and contact part, and apparatuses to which they are applied

A wear-resistant iron-based sintered contact material is provided which is sintered by powder sintering so as to have high density, high seizure resistance and wear resistance. A wear-resistant iron-based sintered composite contact component composed of the wear-resistant iron-based sintered contact material sinter-bonded to a backing metal and its producing method are also provided. To this end, at least CrC-type carbide and/or MC-type carbide which have an average particle diameter of 5 &#x3bc;m or more are precipitately dispersed in an amount of 20 to 50% by volume within an iron-based martensite parent phase which has a hardness of HRC 50 or more even when tempered at up to 600&#xb0; C.

Wear-resistant sintered contact material, wear-resistant sintered composite contact component and method of producing the same

With the objectives of alleviating the property of attacking on the mating member by scratching-off of local agglutinates on the sliding contact surface, achieving improved wear resistance, and achieving improved seizure resistance through restraint of frictional heat generation by a hard phase, a copper based sintered contact material contains shock-resistant ceramics in an amount of 0.05 to less than 0.5 wt % as non-metallic particles composed of one or more substances selected from pulverized oxides, carbides and nitrides. The shock-resistant ceramics are comprised of SiOand/or two or more substances selected from SiO, AlO, LiO, TiOand MgO.

Copper based sintered contact material and double-layered sintered contact member

A coupling device for equipment implements is described, which coupling device does not impair the lubricity of bearing sections when the equipment is in service, does not cause seizure during rotation of bearings, does not need frequent feeding of grease to the bearing sections from outside, and provides good noise absorbability. The coupling device has such a structure that a metal based contact materialcapable of storing a lubricating oil and/or lubricant is interposed between an implement bushingmade from steel and implement pinof an implement for construction equipment.

Coupling device for equipment implement

The invention provides a pin assembly and Implements connecting apparatus which can replace a working device such as a bucket or the like easily and for a short time. A first member () having a pair of brackets () is connected to a second member () having a boss portion (). First member () and second member () are connected so as to swing freely and mutually by inserting a pin assembly () having an outer tubular body () and a connection pin () rotatably connected thereto into one bracket (), boss portion () and another bracket (). In a connected state, outer tubular body () and boss portion () are fixed. Pin assembly () can be pulled out by applying a pressing force to an opposite side in an inserting direction of pin assembly ().

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Yawata, Japan

Tetsuo Ohnishi