Komatsu Corporation

Matsushita Electric Industrial Co., Ltd.

Masayuki Ohishi

Masaharu Amano

Takemori Takayama

Chigo Okayama

Takeyo Terao

Naomi Kobayashi

Hajime Aoyama

Masakuni Ueda

Yoshikiyo Tanaka

Kenichi Hisamatsu

Hisao Asada

Tomoyoshi Sho

Yoshitada Moriyasu

Shusaku Yamamoto

Seiki Morishita

Kazuyoshi Suzuki

Shouzou Tomikawa

Tetsuya Ohno

A wear resistant component includes a matrix portion made of metal, and a core that is embedded in the matrix portion and is higher in hardness than the matrix portion. The core has a shape that follows a shape of at least a portion of a surface of the matrix portion.

Wear resistant component

A wear resistant component includes a matrix portion made of metal, and a framework portion that is embedded in the matrix portion and is higher in hardness than the matrix portion. The framework portion has a three-dimensional lattice structure formed with a plurality of bar-shaped members, and has a shape that follows a shape of at least a portion of a surface of the matrix portion.

A sprocket wheel, which is a machine component configured to slide relative to a bushing while being in contact with the bushing in an outer peripheral surface, includes a base made of a first metal, and an overlay that covers the base so as to constitute the outer peripheral surface. The surface of the overlay constituting the outer peripheral surface has been smoothed. Such a smoothed surface of the overlay makes the sprocket wheel less damaging to the bushing.

Machine component and method for producing the same

A tooth, which is a wear-resistant component, includes a core, and a body made of a first metal and disposed to enclose the core. The core includes a matrix made of a second metal, first hard particles dispersed in the matrix, and a hard structure extending from the corresponding first hard particle in a direction along the grain flow in the body, the hard structure being higher in hardness than the matrix.

Wear-resistant component and method for producing the same

A sprocket wheel, which is an example of the machine component, includes a base made of a first metal, and an overlay disposed in contact with the base to cover at least a part of a surface of the base. The overlay includes a matrix made of a second metal, and hard particles dispersed in the matrix. The overlay includes a protrusion that protrudes toward the base in a region including the interface between the overlay and the base.

A sprocket wheel has an annular shape. The sprocket wheel has a plurality of projections formed on an outer peripheral surface for transmitting a driving force to a track. The sprocket wheel includes a base made of a first metal, and an overlay including a second metal that covers the base so as to constitute at least a part of the outer peripheral surface. The overlay is formed with a metallic structure that is continuous in the circumferential direction so as to connect between adjacent ones of the projections.

Sprocket wheel and method for producing the same

A sprocket wheel, which is an example of the machine component, includes a base made of a first metal, and an overlay disposed in contact with the base to cover at least a part of a surface of the base. The overlay includes a matrix made of a second metal, and hard particles dispersed in the matrix. The surface of the overlay is a forged surface. The hard particles located in an overlay surface region within an average particle diameter of the hard particles from the surface of the overlay are arranged side by side while being embedded in the overlay.

The lug bar includes a base, having a bar shape and made of a first metal, and an overlay, extending along the longitudinal direction of the base to cover a covered region as a part of the outer peripheral surface of the base. In an overlay edge portion corresponding to a boundary between the covered region and an exposed region other than the covered region of the surface of the base, the exposed region and the surface of the overlay are flush with each other to form a forged surface.

Lug bar, track shoe, and method for producing lug bar

A tooth which is an example of a wear-resistant component includes a base made of a first metal, and an overlay disposed in contact with the base to cover a covered region that is a part of a surface of the base. In an overlay edge portion corresponding to a boundary between the covered region and an exposed region other than the covered region on the surface of the base, the exposed region and a surface of the overlay are flush with each other to form a forged surface.

Quenched layers are formed without irregularities on the inner circumferential surface of a track bushing having a small inside diameter or on the inner circumferential surfaces of two or more track bushings which are subjected to quenching in an overlapped condition. To introduce a cooling medium for cooling the inner circumferential surface of the track bushing, a guide tube having an outside diameter smaller than the inside diameter of the track bushing is disposed on the side of the inner circumferential surface and the cooling medium introduced by the guide tube is diverted by a diverting member having a spherical or similar curved surface, such that the cooling medium is allowed to flow in a direction substantially parallel with an axial direction of the track bushingwithin a space defined by the outer circumferential surface of the guide tube and the inner circumferential surface of the track bushing, thereby performing laminar flow cooling.

Track bushing and method and apparatus for producing the same

Crawler bushing and method and device for producing the same

A video camera includes a first housing accommodating a recording and reproducing device for recording and reproducing video signals and having a recess defined therein on an upper surface thereof, and a second housing having a first surface and a second surface opposite to each other and housed in the recess of the first housing at its rest position at which the first surface of the second housing is opposed to the upper surface of the first housing. The second housing has a recess defined therein on the second surface thereof. The video camera also includes a monitor screen mounted on the first surface of the second housing and a support member having a first end to which the second housing is hingedly connected and a second end hingedly connected to the first housing. The support member is housed in the recess of the second housing when the second housing is in the rest position.

Growing community of inventors

Neyagawa, Japan

Masayuki Ohishi