Komatsu Corporation

Takuya Nohara

Shuuji Hori

Hiroyuki Chikugo

Toshiyuki Matsumoto

Mitsumasa Akashi

Mutsumi Ono

Yuta Baba

In order to be able to easily check the state of foreign matter contained in oil regardless of an installation location, a device main bodyhaving a housing chamberin which oil is stored, a plugattached to a bottom portion of the housing chamberin a state where an end surface of a shaft portionfaces upward, a spacer memberformed by a transparent member and arranged on the plugin such a manner that one end surfacefaces an inside of the housing chamber; and an imaging unitarranged on the plug, the imaging unitimaging the inside of the housing chambervia the spacer memberare provided.

Mechanical device

A blocking configuration of an oil pressure circuit hole includes a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body. The plug includes: a shaft portion; an external thread portion disposed on a leading end of the shaft portion; an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery of the shaft portion and an inner periphery of the oil pressure circuit hole to seal them; a flange portion having an external diameter larger than that of the shaft portion and disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and a polygonal column-shaped head portion on which a tightening tool is mounted and disposed on a part of a base end side of the flange portion.

Blocking configuration of oil pressure circuit hole

Growing community of inventors

Tokyo, Japan

Takuya Nohara