JPS6187203U - - Google Patents

Info

Publication number
JPS6187203U
JPS6187203U JP17163684U JP17163684U JPS6187203U JP S6187203 U JPS6187203 U JP S6187203U JP 17163684 U JP17163684 U JP 17163684U JP 17163684 U JP17163684 U JP 17163684U JP S6187203 U JPS6187203 U JP S6187203U
Authority
JP
Japan
Prior art keywords
pressure oil
pressure receiving
receiving chamber
pressure
actuator
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
JP17163684U
Other languages
Japanese (ja)
Other versions
JPH0346246Y2 (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 JP1984171636U priority Critical patent/JPH0346246Y2/ja
Publication of JPS6187203U publication Critical patent/JPS6187203U/ja
Application granted granted Critical
Publication of JPH0346246Y2 publication Critical patent/JPH0346246Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

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

第１図ないし第３図は本考案の１実施例の１部
を破断して示す油圧回路図で、第１図はアクチユ
エータの負荷が小さい場合、第２図及び第３図は
アクチユエータの負荷が大きい場合を示す。 ポンプ…１，２、アクチユエータ…４、圧油供
給路…４９、バイパススプール…１１、パイロツ
トスプール…１３、タンク…２６、第１の受圧室
…１７、第２の受圧室…２０。 1 to 3 are partially cutaway hydraulic circuit diagrams of an embodiment of the present invention. FIG. 1 shows a case where the load on the actuator is small, and FIGS. 2 and 3 show a case where the load on the actuator is small. Indicates a large case. Pumps...1, 2, actuator...4, pressure oil supply path...49, bypass spool...11, pilot spool...13, tank...26, first pressure receiving chamber...17, second pressure receiving chamber...20.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 複数のポンプから吐出された圧油を分流又は合
流させてアクチユエータに供給することによりア
クチユエータの駆動速度を切り換えるようにした
油圧駆動装置における駆動速度切換装置において
、１のポンプから吐出された圧油を他のポンプか
らアクチユエータに至る圧油供給路に合流させ又
はタンクにバイパスさせるかを選択的に切り換え
るバイパススプールと、このバイパススプールを
駆動するパイロツトスプールを具え、上記パイロ
ツトスプールの片側に上記圧油供給路内の圧油が
作用する第１の受圧室を形成するとともに他側に
上記１のポンプから吐出された圧油が作用する上
記第１の受圧室の受圧面積より小さい受圧面積を
有する第２の受圧室を形成したことを特徴とする
油圧駆動装置における駆動速度切換装置。 In a drive speed switching device for a hydraulic drive device, which switches the drive speed of an actuator by dividing or merging the pressure oil discharged from a plurality of pumps and supplying the same to the actuator, the pressure oil discharged from one pump is A bypass spool is provided that selectively switches whether the pressure oil supply path from another pump to the actuator is merged or bypassed to the tank, and a pilot spool that drives this bypass spool, and the pressure oil is supplied to one side of the pilot spool. A second pressure receiving chamber which forms a first pressure receiving chamber on which the pressure oil in the passage acts, and has a smaller pressure receiving area on the other side than the pressure receiving area of the first pressure receiving chamber on which the pressure oil discharged from the first pump acts. A drive speed switching device for a hydraulic drive device, characterized in that a pressure receiving chamber is formed.
JP1984171636U 1984-11-14 1984-11-14 Expired JPH0346246Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984171636U JPH0346246Y2 (en) 1984-11-14 1984-11-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984171636U JPH0346246Y2 (en) 1984-11-14 1984-11-14

Publications (2)

Publication Number Publication Date
JPS6187203U true JPS6187203U (en) 1986-06-07
JPH0346246Y2 JPH0346246Y2 (en) 1991-09-30

Family

ID=30729312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984171636U Expired JPH0346246Y2 (en) 1984-11-14 1984-11-14

Country Status (1)

Country Link
JP (1) JPH0346246Y2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421793U (en) * 1977-07-15 1979-02-13
JPS5743002A (en) * 1980-08-28 1982-03-10 Kayaba Ind Co Ltd Automatic speed changeover valve for two-speed motor
JPS58125701U (en) * 1982-02-19 1983-08-26 カヤバ工業株式会社 hydraulic distribution device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851782A (en) * 1972-08-18 1974-12-03 Aluminum Co Of America Container closure with vent opening means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421793U (en) * 1977-07-15 1979-02-13
JPS5743002A (en) * 1980-08-28 1982-03-10 Kayaba Ind Co Ltd Automatic speed changeover valve for two-speed motor
JPS58125701U (en) * 1982-02-19 1983-08-26 カヤバ工業株式会社 hydraulic distribution device

Also Published As

Publication number Publication date
JPH0346246Y2 (en) 1991-09-30

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