JPS5618155A - Self-traveling tractor - Google Patents

Self-traveling tractor

Info

Publication number
JPS5618155A
JPS5618155A JP9274679A JP9274679A JPS5618155A JP S5618155 A JPS5618155 A JP S5618155A JP 9274679 A JP9274679 A JP 9274679A JP 9274679 A JP9274679 A JP 9274679A JP S5618155 A JPS5618155 A JP S5618155A
Authority
JP
Japan
Prior art keywords
hydraulic
hydraulic motors
change
motors
hydraulic motor
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
JP9274679A
Other languages
Japanese (ja)
Inventor
Tsutomu Sugimoto
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Agricultural Equipment 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 Yanmar Agricultural Equipment Co Ltd filed Critical Yanmar Agricultural Equipment Co Ltd
Priority to JP9274679A priority Critical patent/JPS5618155A/en
Publication of JPS5618155A publication Critical patent/JPS5618155A/en
Pending legal-status Critical Current

Links

Landscapes

  • Motor Power Transmission Devices (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE: To make it possible to perform normal or reverse stepless speed change in a wide range by forming a closed circuit between at least three hydraulic motors of travel driving hydraulic motor and operating machine driving hydraulic motor, which are in connected state, and a hydraulic pump.
CONSTITUTION: Hydraulic motors RM and LM are directly connected to left and right rear wheels, and a hydraulic motor PM is directly connected to a PTO shaft. Respective hydraulic motors are connected in series with each other and there is formed the closed circuit CC in which pressurized oil between respective hydraulic motors and the constant capacitance type hydraulic pump driven by an engine successively passes through the hydraulic motors PM, RM and LM and refluxes to the hydraulic pump P. The control of supply or interruption of pressurized oil with respect to each hydraulic motor and the control of the supply direction are performed by change-over valves V1WV3. Any of change-over valves is a 4-port, 3-position change-over valve, and controlled by a control circuit CTR. A charge pump CP for supplying pressurized oil is provided on an oil path connecting oil ports of respective hydraulic motors.
COPYRIGHT: (C)1981,JPO&Japio
JP9274679A 1979-07-19 1979-07-19 Self-traveling tractor Pending JPS5618155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9274679A JPS5618155A (en) 1979-07-19 1979-07-19 Self-traveling tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9274679A JPS5618155A (en) 1979-07-19 1979-07-19 Self-traveling tractor

Publications (1)

Publication Number Publication Date
JPS5618155A true JPS5618155A (en) 1981-02-20

Family

ID=14062971

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9274679A Pending JPS5618155A (en) 1979-07-19 1979-07-19 Self-traveling tractor

Country Status (1)

Country Link
JP (1) JPS5618155A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63125509A (en) * 1986-11-14 1988-05-28 Okura Ind Co Ltd Photocurable, anaerobically curable composition
JPS63172724U (en) * 1987-04-30 1988-11-09
JPH0393227U (en) * 1990-01-12 1991-09-24
WO2013118356A1 (en) * 2012-02-06 2013-08-15 住友重機械工業株式会社 Hydraulic closed circuit system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013906A (en) * 1973-06-08 1975-02-13
JPS50138271A (en) * 1974-04-22 1975-11-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013906A (en) * 1973-06-08 1975-02-13
JPS50138271A (en) * 1974-04-22 1975-11-04

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63125509A (en) * 1986-11-14 1988-05-28 Okura Ind Co Ltd Photocurable, anaerobically curable composition
JPS63172724U (en) * 1987-04-30 1988-11-09
JPH0393227U (en) * 1990-01-12 1991-09-24
WO2013118356A1 (en) * 2012-02-06 2013-08-15 住友重機械工業株式会社 Hydraulic closed circuit system

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