Komatsu Corporation

Osamu Kodama

Takuma Nishimura

Kyousuke Moriguchi

Kazuhito Nishimaki

Masaaki Kuma

Michihiro Aida

Kaoru Hasegawa

Nobuaki Kawasaki

Noritoshi Takekuma

Takafumi Takenaka

A lubricating apparatus includes a lubricating oil supplying member disposed to face a tip surface of an input shaft. An axial oil passage and a radial oil passage are formed inside the input shaft and allow an outer circumferential surface of the input shaft having outer spline teeth and the tip surface to communicate with each other. A first supplied oil passage and a second supplied oil passage are formed inside the lubricating oil supplying member, a lubricating oil supplied to the axial oil passage flowing through the first supplied oil passage and the second supplied oil passage. The first supplied oil passage is provided with an inflow port, the lubricating oil flowing into the first supplied oil passage through the inflow port. The inflow port is open to an outer circumferential surface of the lubricating oil supplying member in a radial direction of the input shaft.

Lubricating apparatus

A fluid type power transmission system includes a fluid type power transmission device and a control part. The fluid type power transmission device includes an inlet part and an outlet part for a working fluid. The fluid type power transmission device is configured to transmit power in response to circulation of the working fluid in the interior thereof. The control part is configured to control a pressure of the working fluid in the inlet part by regulating a pressure of the working fluid in the outlet part of the fluid type power transmission device.

Fluid type power transmission system

A motor grader includes an engine, a torque converter, a drive wheel, an engine revolution detector, and a control unit. The torque converter, including a lock-up clutch, transmits driving force from the engine. The drive wheel is rotationally driven by the driving force from the engine. The engine revolution detector detects engine revolution. When the lock-up clutch is engaged, the control unit is configured to: maintain the engaged state of the lock-up clutch when the engine revolution is greater than a predetermined lock-up release revolution lower than a low idle revolution; and switch the lock-up clutch into a disengaged state when the engine revolution is less than or equal to the predetermined lock-up release revolution.

Motor grader

A cylindrical roller bearing or needle roller bearing for use with a rolling raceway surface is subjected to a carbonitriding treatment to produce a layer containing 30 to 80% retained austenite in the vicinity of its surface that contacts a carburized layer of a rolling raceway surface of a roller bearing. The amount of retained austenite of the surface layer of the roller bearing is increased by about 30%. The surface layer is then heat treated to apply a residual compression stress. The surface then receives surface finishing to produce micro concavo-convex portions in a random direction.

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Komatsu, Japan

Osamu Kodama