JPS5572925A - Control device for working oil temperature of hydraulic joint - Google Patents

Control device for working oil temperature of hydraulic joint

Info

Publication number
JPS5572925A
JPS5572925A JP14421578A JP14421578A JPS5572925A JP S5572925 A JPS5572925 A JP S5572925A JP 14421578 A JP14421578 A JP 14421578A JP 14421578 A JP14421578 A JP 14421578A JP S5572925 A JPS5572925 A JP S5572925A
Authority
JP
Japan
Prior art keywords
temperature
oil
comparator
flow
detector
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
JP14421578A
Other languages
Japanese (ja)
Inventor
Yoshiaki Nakauchi
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 Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP14421578A priority Critical patent/JPS5572925A/en
Publication of JPS5572925A publication Critical patent/JPS5572925A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lifting Devices For Agricultural Implements (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To keep working oil temperature within a fixed range and prevent deterioration by connecting temperature detector and temperature-setting device with comparator and, using the comparator, opening flow-controlling valve when working oil temperature detected by the comparator exceeds the set value.
CONSTITUTION: Flow-controlling valve 5 is provided between warking oil supply pump 7 and rubber 1 in the circuit of working oil of hydraulic joint F, and temperature detector 2 is fitted for detecting working-oil temperature on the side of outlet of operating oil (e.g. scooping tube). Temperature detector 2 is connected electrically with comparator 4 through amplifier 6, while electrical connection of warking- oil temperature setting device 3 and also connection of flow-controlling valve 5 are made with comparator 4 respectively. When the temperature of oil rises, the value thereof is detected by detector 2 and amplified by amplifier 6. When the temperature of oil exceeds the set temperature, a signal is given by comparator 4 and the opening of flow-controlling balve is enlarged, which increases flow of oil and thus lowers its temperature.
COPYRIGHT: (C)1980,JPO&Japio
JP14421578A 1978-11-24 1978-11-24 Control device for working oil temperature of hydraulic joint Pending JPS5572925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14421578A JPS5572925A (en) 1978-11-24 1978-11-24 Control device for working oil temperature of hydraulic joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14421578A JPS5572925A (en) 1978-11-24 1978-11-24 Control device for working oil temperature of hydraulic joint

Publications (1)

Publication Number Publication Date
JPS5572925A true JPS5572925A (en) 1980-06-02

Family

ID=15356907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14421578A Pending JPS5572925A (en) 1978-11-24 1978-11-24 Control device for working oil temperature of hydraulic joint

Country Status (1)

Country Link
JP (1) JPS5572925A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857521A (en) * 1981-09-30 1983-04-05 Hitachi Ltd Controller for hydraulic oil for variable fluid coupling
JPS6365822U (en) * 1986-10-20 1988-04-30
JPH02245523A (en) * 1989-03-17 1990-10-01 Hitachi Ltd Variable speed fluid transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857521A (en) * 1981-09-30 1983-04-05 Hitachi Ltd Controller for hydraulic oil for variable fluid coupling
JPS6365822U (en) * 1986-10-20 1988-04-30
JPH0526265Y2 (en) * 1986-10-20 1993-07-02
JPH02245523A (en) * 1989-03-17 1990-10-01 Hitachi Ltd Variable speed fluid transmission

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