JPS56131803A - Equipment with oil hydraulic cylinder of high speed and high pressure - Google Patents

Equipment with oil hydraulic cylinder of high speed and high pressure

Info

Publication number
JPS56131803A
JPS56131803A JP3390280A JP3390280A JPS56131803A JP S56131803 A JPS56131803 A JP S56131803A JP 3390280 A JP3390280 A JP 3390280A JP 3390280 A JP3390280 A JP 3390280A JP S56131803 A JPS56131803 A JP S56131803A
Authority
JP
Japan
Prior art keywords
pressure
oil hydraulic
high speed
oil
sent
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP3390280A
Other languages
Japanese (ja)
Inventor
Hideyuki Kitagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3390280A priority Critical patent/JPS56131803A/en
Publication of JPS56131803A publication Critical patent/JPS56131803A/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To obtain high speed, high output in spite of use of an oil hydraulic pump of low pressure, low discharge by a method wherein a combination cylinder is made up by providing a boosting cavity between a high output generating piston and a high speed moving piston.
CONSTITUTION: In an oil hydraulic valve V1 is shifted to a position V1a, pressure oil sent under pressure from an oil hydraulic pump is sent to oil hydraulic valves V2, V3 through a line 9. If the V2 is at a position V2a and the V3 is at a position V3a, the pressure oil is sent to the boosting cacity 6 of a cylinder 1 and the high speed moving piston 3 falls at a high speed. When the point of the piston 3 runs into a load 8, the pressure in a cavity 6 rises, a pressure control valve V4 opens and as a result the oil hydraulic valve V3 is shifted to a position V3b. Accordingly, the pressure oil is sent to a cavity 4, a high pressure generating piston 2 is dropped to give a large pressure to the load 8.
COPYRIGHT: (C)1981,JPO&Japio
JP3390280A 1980-03-19 1980-03-19 Equipment with oil hydraulic cylinder of high speed and high pressure Pending JPS56131803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3390280A JPS56131803A (en) 1980-03-19 1980-03-19 Equipment with oil hydraulic cylinder of high speed and high pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3390280A JPS56131803A (en) 1980-03-19 1980-03-19 Equipment with oil hydraulic cylinder of high speed and high pressure

Publications (1)

Publication Number Publication Date
JPS56131803A true JPS56131803A (en) 1981-10-15

Family

ID=12399444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3390280A Pending JPS56131803A (en) 1980-03-19 1980-03-19 Equipment with oil hydraulic cylinder of high speed and high pressure

Country Status (1)

Country Link
JP (1) JPS56131803A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093716A (en) * 1983-10-28 1985-05-25 株式会社日立製作所 Hydraulic drive device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093716A (en) * 1983-10-28 1985-05-25 株式会社日立製作所 Hydraulic drive device
JPH0316522B2 (en) * 1983-10-28 1991-03-05 Hitachi Ltd

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