Hydraulic drive device utilizing electric motor

Details Hydraulic drive device utilizing electric motor Hydraulic drive device utilizing electric motor

2006-04-11

2006-04-11

Wright, Dirk (Department: 3681)

Machine element or mechanism

Gearing

With fluid drive

Reexamination Certificate

active

07024964

ABSTRACT:
Rotational output of an electric motor is directly connected to a hydraulic pump or a hydraulic motor. The electric motor acts as drive source for a hydraulic drive machine such as hydraulic shovel, bulldozer or that for a generator. A hydraulic drive device utilizing the electric motor includes an electric motor102, a first rotation transmission device106connected to an output shaft102aof the electric motor102and performing speed increasing function, a hydraulic pump108driven by an output shaft106bof the first rotation transmission device106, a hydraulic motor110where oil from the hydraulic pump108is supplied through an operation-switching valve109, a second rotation transmission device107connected to an output shaft110aof the hydraulic motor110and performing speed increasing function, and a drive output shaft125disposed on the output side of the second rotation transmission device107.

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patent: 2002/276648 (2002-09-01), None
patent: WO 02/103222 (2002-12-01), None

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