JPS6144497U - Drive speed switching device in hydraulic drive equipment - Google Patents

Drive speed switching device in hydraulic drive equipment

Info

Publication number
JPS6144497U
JPS6144497U JP12932184U JP12932184U JPS6144497U JP S6144497 U JPS6144497 U JP S6144497U JP 12932184 U JP12932184 U JP 12932184U JP 12932184 U JP12932184 U JP 12932184U JP S6144497 U JPS6144497 U JP S6144497U
Authority
JP
Japan
Prior art keywords
drive
hydraulic
speed switching
switching device
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.)
Pending
Application number
JP12932184U
Other languages
Japanese (ja)
Inventor
邦彦 松沢
Original Assignee
三菱重工業株式会社
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 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to JP12932184U priority Critical patent/JPS6144497U/en
Publication of JPS6144497U publication Critical patent/JPS6144497U/en
Pending legal-status Critical Current

Links

Landscapes

  • Forklifts And Lifting Vehicles (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図ないし第３図は本考宥の１実施例を示す油圧回路
図で、第１図は軽負荷の静止状態を、第２図は軽負荷の
江上状態を、第３図は大負荷の江上状態をそれぞれ示す
。 油圧アクチュエータ・・・５、駆動源・・・Ｍ，第１の
ポンプ・・・１、第２のポンプ・・・２、検知装置・・
・１１、切換手段・・・１７、圧油洪給回路・・・１４
、タンク・・・１５。Figures 1 to 3 are hydraulic circuit diagrams showing one embodiment of this study. Figure 1 shows the stationary state with a light load, Figure 2 shows the Egami state with a light load, and Figure 3 shows the heavy load. The Egami state of each is shown. Hydraulic actuator...5, Drive source...M, First pump...1, Second pump...2, Detection device...
・11, Switching means...17, Pressure oil flood circuit...14
, Tank...15.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 負荷を駆動する油川アクチュエータと、１の駆動源によ
り駆動される第１及び第２のポンプと、上記油圧アクチ
ュエータに掛る負荷を検知する検知装置と、上記検知装
置からの信号を受けて作動し上記油圧アクチュエータに
掛る負荷が所定値以下のとき上記第２のポンプから吐出
された圧油を第１のポンプから上記油圧アクチュエータ
に至る圧油供給回路に合流させ、上記油圧アクチュエー
タに掛る負荷が所定値以上のとき手記第２のポンプから
吐出された圧油をタンクにバイパスさせる切換手段を具
え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。Aburakawa actuator that drives a load, first and second pumps driven by one drive source, a detection device that detects the load applied to the hydraulic actuator, and an actuator that operates in response to a signal from the detection device. When the load applied to the hydraulic actuator is below a predetermined value, the pressure oil discharged from the second pump is merged into the pressure oil supply circuit from the first pump to the hydraulic actuator, and the load applied to the hydraulic actuator is set to a predetermined value. A drive speed switching device for a hydraulic drive device, characterized in that it includes a switching means for bypassing the pressure oil discharged from the second pump to a tank in the above case.
JP12932184U 1984-08-28 1984-08-28 Drive speed switching device in hydraulic drive equipment Pending JPS6144497U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12932184U JPS6144497U (en) 1984-08-28 1984-08-28 Drive speed switching device in hydraulic drive equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12932184U JPS6144497U (en) 1984-08-28 1984-08-28 Drive speed switching device in hydraulic drive equipment

Publications (1)

Publication Number Publication Date
JPS6144497U true JPS6144497U (en) 1986-03-24

Family

ID=30687936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12932184U Pending JPS6144497U (en) 1984-08-28 1984-08-28 Drive speed switching device in hydraulic drive equipment

Country Status (1)

Country Link
JP (1) JPS6144497U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010247984A (en) * 2009-04-20 2010-11-04 Tcm Corp Hydraulic circuit control system for forklift

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010247984A (en) * 2009-04-20 2010-11-04 Tcm Corp Hydraulic circuit control system for forklift

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