JPH03365U - - Google Patents

Info

Publication number
JPH03365U
JPH03365U JP6059689U JP6059689U JPH03365U JP H03365 U JPH03365 U JP H03365U JP 6059689 U JP6059689 U JP 6059689U JP 6059689 U JP6059689 U JP 6059689U JP H03365 U JPH03365 U JP H03365U
Authority
JP
Japan
Prior art keywords
hydraulic motor
switching valve
high pressure
passage
speed switching
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
JP6059689U
Other languages
Japanese (ja)
Other versions
JP2519147Y2 (en
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 filed Critical
Priority to JP1989060596U priority Critical patent/JP2519147Y2/en
Publication of JPH03365U publication Critical patent/JPH03365U/ja
Application granted granted Critical
Publication of JP2519147Y2 publication Critical patent/JP2519147Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Motor Power Transmission Devices (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
  • Operation Control Of Excavators (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の第１実施例を示すその全体
回路図、第２図はこの考案の第２実施例を示すそ
の全体回路図である。 １…油圧モータ、３…切換弁、８，９…給排通
路、１２…カウンターバランス弁、１３…高圧ポ
ート、１６…速度切換弁、１７…高圧通路、１８
…パイロツト通路、２６…アクチユエータ。 FIG. 1 is an overall circuit diagram showing a first embodiment of this invention, and FIG. 2 is an overall circuit diagram showing a second embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Hydraulic motor, 3... Switching valve, 8, 9... Supply/discharge passage, 12... Counter balance valve, 13... High pressure port, 16... Speed switching valve, 17... High pressure passage, 18
...Pilot passage, 26...actuator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 車両に走行駆動力を付与する可変容量形油圧モ
ータと、該油圧モータに給排される圧油の流れ方
向を切換える切換弁と、切換弁と油圧モータとを
接続し、油圧モータに作用する負荷が一定値以上
となると高圧側の内圧が所定圧以上に上昇する給
排通路と、給排通路の途中に設けられ、給排通路
から高圧油を選択して取出す高圧ポートを有する
カウンターバランス弁と、カウンターバランス弁
の高圧ポートにパイロツト通路を介して接続され
、パイロツト通路を通じて導かれる高圧油が所定
圧未満のとき第１ポジシヨンに位置し、前記高圧
油が所定圧以上のとき第２ポジシヨンに位置する
速度切換弁と、前記速度切換弁が途中に介装され
、給排通路から選択して取出された高圧油を導く
高圧通路と、高圧通路に接続され、速度切換弁が
第１ポジシヨンに位置しているとき油圧モータの
容量を小さくして該油圧モータを高速小トルク回
転させ、一方、速度切換弁が第２ポジシヨンに位
置しているとき油圧モータの容量を大きくして該
油圧モータを低速大トルク回転させるアクチユエ
ータと、を備えたことを特徴とする走行用油圧回
路。 A variable displacement hydraulic motor that provides driving force to the vehicle, a switching valve that switches the flow direction of pressure oil supplied to and discharged from the hydraulic motor, and a load that acts on the hydraulic motor by connecting the switching valve and the hydraulic motor. a counterbalance valve that has a supply and discharge passage that raises the internal pressure on the high pressure side to a predetermined pressure or higher when the , connected to the high pressure port of the counterbalance valve via a pilot passage, located in a first position when high pressure oil guided through the pilot passage is less than a predetermined pressure, and located in a second position when the high pressure oil is at a predetermined pressure or higher. and a speed switching valve in which the speed switching valve is interposed in the middle and is connected to a high pressure passage that guides high pressure oil selected from the supply and discharge passage, and the high pressure passage, and the speed switching valve is located in a first position. When the speed switching valve is in the second position, the capacity of the hydraulic motor is reduced to rotate the hydraulic motor at high speed and with a small torque, while when the speed switching valve is in the second position, the capacity of the hydraulic motor is increased to rotate the hydraulic motor at low speed. A traveling hydraulic circuit characterized by comprising an actuator that rotates with a large torque.
JP1989060596U 1989-05-25 1989-05-25 Hydraulic circuit for traveling Expired - Lifetime JP2519147Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989060596U JP2519147Y2 (en) 1989-05-25 1989-05-25 Hydraulic circuit for traveling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989060596U JP2519147Y2 (en) 1989-05-25 1989-05-25 Hydraulic circuit for traveling

Publications (2)

Publication Number Publication Date
JPH03365U true JPH03365U (en) 1991-01-07
JP2519147Y2 JP2519147Y2 (en) 1996-12-04

Family

ID=31588097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989060596U Expired - Lifetime JP2519147Y2 (en) 1989-05-25 1989-05-25 Hydraulic circuit for traveling

Country Status (1)

Country Link
JP (1) JP2519147Y2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008280143A (en) * 2007-05-10 2008-11-20 Asuberu Kk Trash box
JP2016148446A (en) * 2015-02-06 2016-08-18 株式会社クボタ Working machine hydraulic system and working machine
WO2019093070A1 (en) * 2017-11-08 2019-05-16 コベルコ建機株式会社 Pivoting work machine
US10316493B2 (en) 2015-02-06 2019-06-11 Kubota Corporation Hydraulic system and working machine including the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839868A (en) * 1971-09-22 1973-06-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839868A (en) * 1971-09-22 1973-06-12

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008280143A (en) * 2007-05-10 2008-11-20 Asuberu Kk Trash box
JP2016148446A (en) * 2015-02-06 2016-08-18 株式会社クボタ Working machine hydraulic system and working machine
US10316493B2 (en) 2015-02-06 2019-06-11 Kubota Corporation Hydraulic system and working machine including the same
WO2019093070A1 (en) * 2017-11-08 2019-05-16 コベルコ建機株式会社 Pivoting work machine
US11131081B2 (en) 2017-11-08 2021-09-28 Kobelco Construction Machinery Co., Ltd. Pivoting work machine

Also Published As

Publication number Publication date
JP2519147Y2 (en) 1996-12-04

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