JPS57173576A - Oil hydraulic pump motor - Google Patents

Oil hydraulic pump motor

Info

Publication number
JPS57173576A
JPS57173576A JP56059388A JP5938881A JPS57173576A JP S57173576 A JPS57173576 A JP S57173576A JP 56059388 A JP56059388 A JP 56059388A JP 5938881 A JP5938881 A JP 5938881A JP S57173576 A JPS57173576 A JP S57173576A
Authority
JP
Japan
Prior art keywords
oil
pressure oil
guided
cooling
path
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.)
Granted
Application number
JP56059388A
Other languages
Japanese (ja)
Other versions
JPH0329990B2 (en
Inventor
Hitoshi Sato
Masahiko Shimotori
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 JP56059388A priority Critical patent/JPS57173576A/en
Publication of JPS57173576A publication Critical patent/JPS57173576A/en
Publication of JPH0329990B2 publication Critical patent/JPH0329990B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

PURPOSE:To prevent seizure of a sliding part, by cooling an oil hydraulic pump motor with working fluid. CONSTITUTION:High pressure oil, fed to a flow inlet-outlet port 12, flows into a pressure oil chamber 23 through an oil path 17 to move a plunger 14 leftward. In this way, an oil path 20 is throttled by the land part of the plunger 14, and pressure oil is guided to the inside 19 of a casing through the throttled path. The pressure oil, after cooling an oil hydrualic motor, is guided to an oil tank through a discharge port 21. Accordingly, since low pressure oil, flowing out from the oil hydraulic motor, is guided into the inside 19 of the casing to perform cooling, a seizure preventive effect can be fully attained.
JP56059388A 1981-04-20 1981-04-20 Oil hydraulic pump motor Granted JPS57173576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56059388A JPS57173576A (en) 1981-04-20 1981-04-20 Oil hydraulic pump motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56059388A JPS57173576A (en) 1981-04-20 1981-04-20 Oil hydraulic pump motor

Publications (2)

Publication Number Publication Date
JPS57173576A true JPS57173576A (en) 1982-10-25
JPH0329990B2 JPH0329990B2 (en) 1991-04-25

Family

ID=13111843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56059388A Granted JPS57173576A (en) 1981-04-20 1981-04-20 Oil hydraulic pump motor

Country Status (1)

Country Link
JP (1) JPS57173576A (en)

Also Published As

Publication number Publication date
JPH0329990B2 (en) 1991-04-25

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