Hitachi Construction Machinery Co., Ltd.

Nobuyoshi Hirowatari

Takayuki Uchida

Hideaki Suzuki

Kozo Nakamura

Katsuaki Tanaka

Yoshimi Kasai

Munetoshi Unuma

Junsuke Fujiwara

Shinya Yuda

Hiroshi Ogura

Mitsuo Aihara

Teruo Nakamura

Rikiya Tajiri

Yuki Hara

Tsugumichi Owaki

Hiroshi Yoshikawa

Akira Ueno

Shohei Yamagata

The maintenance management deviceincludes an error status diagnosis unit, a grace period estimation unit, a maintenance cost estimation unit, and a screen display unit. When the error status diagnosis unithas diagnosed the occurrence of an anomaly, the grace period estimation unitestimates a first grace period leading up to the occurrence of a failure. The maintenance cost estimation unitestimates the cost of corrective maintenance incurred when the failure occurs after the elapse of the first grace period. The screen display unitdisplays a combination of the first grace period and the cost of corrective maintenance. Alternatively, the grace period estimation unitestimates a second grace period over which preventive maintenance may be postponed without a failure.

Maintenance management device for operating machinery

Operation of self-propelled mining equipment in the field can be accurately recognized at a remote position of the equipment. A management center for controlling a dump truck receives signal from sensors in order to show detection data for the working status of the operation instruments and warning indication data based upon the detection data. The warning indication data and the detection data for the working status of the operation instruments are displayed on the same display. Alternatively, in place of the detection data for working status of the operation instruments, related information from a data base concerning the record of maintenance previously conducted may be displayed, or a graph of the detection data for the working status of an operation instrument of another dump truck which is operating in the same working field may be displayed.

Operation management device of self-propelling mining equipment

Growing community of inventors

Tsuchiura, Japan

Nobuyoshi Hirowatari