JPS57205637A - Oil-pressure circuit for travelling of construction machine - Google Patents

Oil-pressure circuit for travelling of construction machine

Info

Publication number
JPS57205637A
JPS57205637A JP56088080A JP8808081A JPS57205637A JP S57205637 A JPS57205637 A JP S57205637A JP 56088080 A JP56088080 A JP 56088080A JP 8808081 A JP8808081 A JP 8808081A JP S57205637 A JPS57205637 A JP S57205637A
Authority
JP
Japan
Prior art keywords
oil
pressure
motor
valve
circuit
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
JP56088080A
Other languages
Japanese (ja)
Inventor
Makoto Mihara
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 JP56088080A priority Critical patent/JPS57205637A/en
Priority to GB08216207A priority patent/GB2101720A/en
Priority to DE19823221543 priority patent/DE3221543A1/en
Priority to NL8202325A priority patent/NL8202325A/en
Publication of JPS57205637A publication Critical patent/JPS57205637A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4148—Open loop circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/423—Motor capacity control by fluid pressure control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4061—Control related to directional control valves, e.g. change-over valves, for crossing the feeding conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

PURPOSE: To easily set up the torque of high and low speeds by using a system in which a relief valve of a high relief pressure is provided in a circuit between a variable capacity motor and an oil-pressure pump, and a pilot pressure working switch valve and a relief valve of a low relief pressure are provided to the branch circuit.
CONSTITUTION: The pressure oil from an oil-pressure pump 4 is supplied to a variable capacity oil-pressure motor 1 through a direction switch valve 3 and a brake valve 2, and the pressure oil from an auxiliary oil-pressure pump 7 is supplied to a control cylinder la through a switch valve 10 and a pilot control circuit 9, whereby permitting the oil-pressure motor 1 to be controlled to high speed or low speed side. A relief valve 2a of a set pressure P1 is provided to a drive circuit between the oil-pressure pump 4 and the oil-pressure motor 1. On the other hand, an oil pressure switch valve 13 to be switched by the pressure oil of the pilot pipeline 9 is provided to a pipeline 12 branched by a circuit between the oil-pressure motor 1 and the oil-pressure pump 4 and a relief valve 14 of a set pressure P2 is likewise provided in such a manner that P1 is larger than P2.
COPYRIGHT: (C)1982,JPO&Japio
JP56088080A 1981-06-10 1981-06-10 Oil-pressure circuit for travelling of construction machine Pending JPS57205637A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56088080A JPS57205637A (en) 1981-06-10 1981-06-10 Oil-pressure circuit for travelling of construction machine
GB08216207A GB2101720A (en) 1981-06-10 1982-06-03 Control circuit for hydrostatic transmission of construction vehicle
DE19823221543 DE3221543A1 (en) 1981-06-10 1982-06-08 CONTROL CIRCUIT FOR SWITCHING HYDRAULIC ENGINES
NL8202325A NL8202325A (en) 1981-06-10 1982-06-09 CONTROL CIRCUIT FOR MOVING HYDRAULIC MOTOR.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56088080A JPS57205637A (en) 1981-06-10 1981-06-10 Oil-pressure circuit for travelling of construction machine

Publications (1)

Publication Number Publication Date
JPS57205637A true JPS57205637A (en) 1982-12-16

Family

ID=13932882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56088080A Pending JPS57205637A (en) 1981-06-10 1981-06-10 Oil-pressure circuit for travelling of construction machine

Country Status (4)

Country Link
JP (1) JPS57205637A (en)
DE (1) DE3221543A1 (en)
GB (1) GB2101720A (en)
NL (1) NL8202325A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604657U (en) * 1983-06-20 1985-01-14 セイレイ工業株式会社 Backhoe hydraulic system
JPS604656U (en) * 1983-06-20 1985-01-14 セイレイ工業株式会社 Backhoe hydraulic system
JPH0220453A (en) * 1988-07-08 1990-01-24 Yutani Heavy Ind Ltd Hydraulic circuit for running construction machine
US5135348A (en) * 1984-03-06 1992-08-04 Kabushiki Kaisha Hikoma Seisakusho Earth-working machine
KR100614058B1 (en) * 1999-06-28 2006-08-22 하츠다 가쿠산기 가부시키가이샤 Hydraulic maintenance vehicle
CN104976307A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN105179632A (en) * 2015-07-16 2015-12-23 河海大学常州校区 Hydraulic coupler
CN111006013A (en) * 2018-10-08 2020-04-14 上海汽车集团股份有限公司 Hydraulic control system for continuously variable transmission
CN112664645A (en) * 2019-10-16 2021-04-16 上海汽车集团股份有限公司 Vehicle, transmission, hydraulic control device, and control method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044510A1 (en) * 2004-09-15 2006-03-30 Zf Friedrichshafen Ag Hydraulic transmission
JP2007303543A (en) * 2006-05-11 2007-11-22 Nabtesco Corp Variable hydraulic motor driving device
CN103836014B (en) * 2012-11-21 2016-12-21 上汽通用五菱汽车股份有限公司 A kind of control device of propulsive mechanism

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604657U (en) * 1983-06-20 1985-01-14 セイレイ工業株式会社 Backhoe hydraulic system
JPS604656U (en) * 1983-06-20 1985-01-14 セイレイ工業株式会社 Backhoe hydraulic system
US5135348A (en) * 1984-03-06 1992-08-04 Kabushiki Kaisha Hikoma Seisakusho Earth-working machine
JPH0220453A (en) * 1988-07-08 1990-01-24 Yutani Heavy Ind Ltd Hydraulic circuit for running construction machine
KR100614058B1 (en) * 1999-06-28 2006-08-22 하츠다 가쿠산기 가부시키가이샤 Hydraulic maintenance vehicle
CN104976307A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN105179632A (en) * 2015-07-16 2015-12-23 河海大学常州校区 Hydraulic coupler
CN111006013A (en) * 2018-10-08 2020-04-14 上海汽车集团股份有限公司 Hydraulic control system for continuously variable transmission
CN112664645A (en) * 2019-10-16 2021-04-16 上海汽车集团股份有限公司 Vehicle, transmission, hydraulic control device, and control method

Also Published As

Publication number Publication date
DE3221543A1 (en) 1983-01-27
NL8202325A (en) 1983-01-03
GB2101720A (en) 1983-01-19

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