Title:
HYDRAULIC EQUIPMENT FOR CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP2020051585
Kind Code:
A
Abstract:
To provide a hydraulic equipment capable of supplying hydraulic oil to a hoisting motor via a traveling motor, in which when the hoisting motor and the traveling motor are operated simultaneously, it is prevented that both pressures in the inlet and outlet sides of the hydraulic oil of the traveling motor become high level.SOLUTION: It is provided a switching valve 35 connected to two oil passages 11a, 11b allowing hydraulic oil to flow between a directional switching valve 5 for a traveling motor 2 and the traveling motor 2, which may shift to a first state where the oil passages 11a, 11b are communicated with each other or a second state where the communication is shut off. The switching valve 35 is configured so as to switch from the second state to the first state when the pressure of the hydraulic oil supplied from a directional switching valve 6 for a hoisting motor 3 to the hoisting motor 3 becomes higher than a predetermined value.SELECTED DRAWING: Figure 2
Inventors:
ABE TAKAMASA
YANAGIBASHI KOSUKE
TERAUCHI KENICHI
YANAGIBASHI KOSUKE
TERAUCHI KENICHI
Application Number:
JP2018184107A
Publication Date:
April 02, 2020
Filing Date:
September 28, 2018
Export Citation:
Assignee:
KOBELCO CONTSTRUCTION MACHINERY LTD
International Classes:
F15B20/00; B66C13/20; F15B11/16
Domestic Patent References:
| JP2016147754A | 2016-08-18 | |||
| JP2011179603A | 2011-09-15 | |||
| JP2002046978A | 2002-02-12 | |||
| JP2002005122A | 2002-01-09 | |||
| JPS6252206A | 1987-03-06 |
Attorney, Agent or Firm:
Creation International Patent Office