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JPS5566685A - Capacity control device for variable capacity type oil pressure pump-motor - Google Patents

Capacity control device for variable capacity type oil pressure pump-motor

Info

Publication number
JPS5566685A
JPS5566685A JP13914578A JP13914578A JPS5566685A JP S5566685 A JPS5566685 A JP S5566685A JP 13914578 A JP13914578 A JP 13914578A JP 13914578 A JP13914578 A JP 13914578A JP S5566685 A JPS5566685 A JP S5566685A
Authority
JP
Japan
Prior art keywords
oil supply
supply path
pressure
cylinder
reached
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
JP13914578A
Other languages
Japanese (ja)
Inventor
Takashi Kanai
Masami Ochiai
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP13914578A priority Critical patent/JPS5566685A/en
Publication of JPS5566685A publication Critical patent/JPS5566685A/en
Pending legal-status Critical Current

Links

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  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE: To reduce the amount of flow nearly to zero at the time of the maximum pressure and prevent energy losses, by shutting an oil supply path by means of a sequence valve when the preset pressure value is reached in the oil supply path and at the same time by releasing the pressure of a cylinder.
CONSTITUTION: One end of cylinder 8, which is in contact with cam ring 2, is connected to the discharge side of the pump via oil supply path 11. Sequence valve 12, which shuts oil supply valve 11 and release the pressure in cylinder 8 to oil tank 13 when the pressure inside oil supply path 11 has reached a preset value, is provided in the midway of oil supply path 11. Thus, when the pressure in oil supply path 11 has reached to preset value, oil supply path 11 is shut and at the same time the pressure in cylinder 8 is released. At the same time, a restoring force is applied on spring 5, and the amount of discharge is reduced nearly to zero at the time of the maximum pressure, and as a result energy losses can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP13914578A 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump-motor Pending JPS5566685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13914578A JPS5566685A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump-motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13914578A JPS5566685A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump-motor

Publications (1)

Publication Number Publication Date
JPS5566685A true JPS5566685A (en) 1980-05-20

Family

ID=15238606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13914578A Pending JPS5566685A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump-motor

Country Status (1)

Country Link
JP (1) JPS5566685A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120500U (en) * 1982-02-09 1983-08-16 日本スピンドル製造株式会社 Bucket for charging scrap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120500U (en) * 1982-02-09 1983-08-16 日本スピンドル製造株式会社 Bucket for charging scrap
JPS624877Y2 (en) * 1982-02-09 1987-02-04

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