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Title:
HYDRAULIC DRIVE DEVICE UTILIZING ELECTRIC MOTOR
Document Type and Number:
Japanese Patent JP3892840
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a hydraulic drive device in such constitution that the rotary output shaft of an electric motor is coupled directly to a hydraulic pump or a hydraulic motor to drive the hydraulic pump or the hydraulic motor, and forms a drive source for hydraulic drive machines, such as a hydraulic shovel, a bulldozer or the like, and a drive source for a generator.
SOLUTION: The hydraulic drive device is provided with the electric motor 102, a first rotation transmitting device 106 coupled to an output shaft 102a of the electric motor 102 and having an accelerating function, a hydraulic pump 108 driven through rotation of an output shaft 106b of a first rotation transmitting device 106, a hydraulic motor 110 to which oil from the hydraulic pump 108 is fed through an operation switch valve 109, a second rotation transmitting device 107 coupled to an output shaft 110a of a hydraulic motor 110 and having an accelerating function, and a drive output shaft 125 situated on the output shaft side of the second rotation device 107. The hydraulic drive machines, such as a hydraulic shovel, bulldozer or the like, and a generator are driven by a drive output shaft 125.


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Inventors:
福地 一義
Application Number:
JP2003000363127
Publication Date:
March 14, 2007
Filing Date:
October 23, 2003
Export Citation:
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Assignee:
福地 一義
International Classes:
E02F9/00; F16H47/04; E02F9/22; F15B1/26; F15B11/00; F15B11/04; F15B21/14; F16H39/02; (IPC1-7): F16H47/04; F15B11/00; F16H39/02; //E02F9/00
Domestic Patent References:
JP1121758U
JP8060705A
JP59010348Y2
JP2002276648A
JP48046102U
JP10082325A
JP2001200811A
Attorney, Agent or Firm:
村上 啓吾