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Patent Searching and Data


Title:
HYDRAULIC POWER TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JP2007247821
Kind Code:
A
Abstract:

To provide a hydraulic power transmission device having higher efficiency in an applicably effective manner while suppressing its energy loss.

The hydraulic power transmission device A comprises a hydraulic pump 3 for discharging pressure oil in both directions, and a plurality of hydraulic motors 6, 7 connected in parallel to the hydraulic pump. At least one of the plurality of hydraulic motors is of a variable capacity type, and output shafts 6a, 7a of the plurality of hydraulic motors are connected to a common member 9 in a power transmissive manner. One hydraulic motor 6 of the variable capacity type is electronically controlled to change the capacity to be zero. Herein, a shut-off valve 15 is provided for shutting off the supply of pressure oil from the hydraulic pump to the hydraulic motor when the capacity of the hydraulic motor is zero. The shut-off valve is connected to communicate at its shut-off position with both inlet and outlet sides of the hydraulic motor.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
KOBAYASHI TAKAHIRO
SUMIO TAISUKE
TERASAKA JOJI
SUGANO NAOKI
HORI NAOTO
Application Number:
JP2006073478A
Publication Date:
September 27, 2007
Filing Date:
March 16, 2006
Export Citation:
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Assignee:
KOBELCO CRANES CO LTD
International Classes:
F16H61/44; F16H39/02; F16H61/444; F16H61/456
Attorney, Agent or Firm:
松永 勉