Title:
CONSTRUCTION OF HYDRAULIC CIRCUIT OF OPERATION CAR
Document Type and Number:
Japanese Patent JP2760702
Kind Code:
B2
Abstract:
PURPOSE: To supply operating fluid to an operation device so that it is not in excessive supply and to prevent the diagonal movement of a body of the device and the shortage of operating fluid for the operation device when the operation device is operated during the straight advancement in construction of a hydraulic circuit of an operation car connecting a control valve for a hydraulic traveling device and a control valve for the operation device to first and second pumps respectively in parallel.
CONSTITUTION: In center oil discharging passages 28 and 30 of first and second pumps 11 and 20, oil discharging passages 29 and 31 are respectively branched from upper side elements 28a and 30a of control valves 19 and 27 for a hydraulic traveling device, one of them is connected to control valves 24 and 25 for the operation device on the second pump 20 side, and the other is connected to a control valve 15 for the operation device on the first pump 11 side. When the control valves 19 and 27 for the hydraulic traveling device are operated in traveling positions 19F, 27F, 19R and 27R, the center oil discharging passages 28 and 30 are cut off, and operating fluid from the center oil discharging passages 28 and 30 is supplied to the control valves 24, 25 and 15 for the operation device.
Inventors:
ARII KAZUYOSHI
Application Number:
JP15988992A
Publication Date:
June 04, 1998
Filing Date:
June 19, 1992
Export Citation:
Assignee:
KUBOTA KK
International Classes:
E02F9/22; (IPC1-7): E02F9/22
Domestic Patent References:
| JP6078022A |
Attorney, Agent or Firm:
Kitamura Osamu
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