MY111028A - Hydraulic device for working machine. - Google Patents

Hydraulic device for working machine.

Info

Publication number
MY111028A
MY111028A MYPI94002360A MYPI19942360A MY111028A MY 111028 A MY111028 A MY 111028A MY PI94002360 A MYPI94002360 A MY PI94002360A MY PI19942360 A MYPI19942360 A MY PI19942360A MY 111028 A MY111028 A MY 111028A
Authority
MY
Malaysia
Prior art keywords
actuator
solenoid
flow rate
pressure
hydraulic pump
Prior art date
Application number
MYPI94002360A
Inventor
Kobayashi Takahiro
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to MYPI94002360A priority Critical patent/MY111028A/en
Publication of MY111028A publication Critical patent/MY111028A/en

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A HYDRAULIC DEVICE FOR OPERATING AN ACTUATOR IN A WORKING MACHINE SUCH AS A HYDRAULIC SHOVEL OR THE LIKE HAS A SOLENOID-OPERATED PROPORTIONAL FLOW REGULATING VALVE CONNECTED TO A PIPE BETWEEN A HYDRAULIC PUMP AND A DIRECTIONAL CONTROL VALVE FOR CHANGING THE DIRECTION IN WHICH THE ACTUATOR OPERATES, AND A DISCHARGE PRESSURE CONTROL ASSEMBLY FOR CONTROLLING THE DISCHARGE PRESSURE FROM THE HYDRAULIC PUMP TO MAKE CONSTANT THE DIFFERENTIAL PRESSURE BETWEEN THE INLET AND OUTLET PORTS OF THE SOLENOID-OPERATED PROPORTIONAL FLOW REGULATING VALVE. FLOW RATE CHARACTERISTICS OF OIL SUPPLIED UNDER PRESSURE TO THE ACTUATOR WITH RESPECT TO THE AMOUNT OF CONTROLLING MOVEMENT OF A CONTROL LEVER AS ESTABLISHED BY A FLOW RATE SETTING UNIT DEPENDING ON A LOAD PRESSURE ON THE ACTUATOR AND THE ROTATIONAL SPEED OF AN ENGINE WHICH OPERATES THE HYDRAULIC PUMP. THE OPENING OF THE SOLENOID-OPERATED PROPORTIONAL FLOW REGULATING VALVE IS CONTROLLED BY A SOLENOID-OPERATED VALVE CONTROL UNIT DEPENDING ON THE AMOUNT OF CONTROLLING MOVEMENT OF THE CONTROL LEVER IN ACCORDANCE WITH THE ESTABLISHED FLOW RATE CHARACTERISTICS. IT IS POSSIBLE TO OBTAIN SUITABLE FLOW RATE CHARACTERISTICS OF OIL SUPPLIED UNDER PRESSURE TO THE ACTUATOR TO MEET THE OPERATOR' S PREFERENCE OR VARIOUS WORKING PATTERNS, AND THE OPERATOR CAN QUICKLY AND EASILY RECOGNIZE THE LOAD CONDITION OF THE ACTUATOR THROUGH THE OPERATION OF THE CONTROL LEVER. (FIG.1).
MYPI94002360A 1994-09-08 1994-09-08 Hydraulic device for working machine. MY111028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MYPI94002360A MY111028A (en) 1994-09-08 1994-09-08 Hydraulic device for working machine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MYPI94002360A MY111028A (en) 1994-09-08 1994-09-08 Hydraulic device for working machine.

Publications (1)

Publication Number Publication Date
MY111028A true MY111028A (en) 1999-07-31

Family

ID=80248284

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI94002360A MY111028A (en) 1994-09-08 1994-09-08 Hydraulic device for working machine.

Country Status (1)

Country Link
MY (1) MY111028A (en)

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