JPH024900U - - Google Patents

Info

Publication number
JPH024900U
JPH024900U JP8270288U JP8270288U JPH024900U JP H024900 U JPH024900 U JP H024900U JP 8270288 U JP8270288 U JP 8270288U JP 8270288 U JP8270288 U JP 8270288U JP H024900 U JPH024900 U JP H024900U
Authority
JP
Japan
Prior art keywords
hydraulic cylinder
oil
valve seat
throttle valve
valve element
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
JP8270288U
Other languages
Japanese (ja)
Other versions
JPH0649594Y2 (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 JP1988082702U priority Critical patent/JPH0649594Y2/en
Publication of JPH024900U publication Critical patent/JPH024900U/ja
Application granted granted Critical
Publication of JPH0649594Y2 publication Critical patent/JPH0649594Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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図は本考案の一実施例を示す油圧回路図、
第２図は高所用のリフトトラツクの斜視図、第３
図は同側面図、第４図は分解説明図、第５図は応
用例の説明図、第６図及び第７図は他の実施例を
示す説明図である。 １７…油圧シリンダ、２２…油圧ポンプ、２３
…油タンク、２８…一次側ポート、２９…二次側
ポート、３０…バルブ本体、３３…スプリングヘ
ツド（絞り弁体）、３４…弁座、３５…復流用ス
プリング。 FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
Figure 2 is a perspective view of a lift truck for high places;
4 is an exploded explanatory view, FIG. 5 is an explanatory view of an applied example, and FIGS. 6 and 7 are explanatory views showing other embodiments. 17...Hydraulic cylinder, 22...Hydraulic pump, 23
...oil tank, 28...primary side port, 29...secondary side port, 30...valve body, 33...spring head (throttle valve body), 34...valve seat, 35...spring for return flow.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 油圧ポンプ及び油タンクに接続させる一次側ポ
ートと、油圧シリンダに接続させる二次側ポート
とを、バルブ本体に設ける一方、前記バルブ本体
の一次側と二次側の各ポートの間に絞り弁体及び
弁座を配設させると共に、油圧シリンダからの低
圧戻り油に抗して絞り弁体を弁座から離反させる
復流用スプリングを設け、油圧シリンダからの高
圧戻り油により復流用スプリングに抗して絞り弁
体を弁座に当接させて、該シリンダから油タンク
への高圧戻り油流量を規制するように構成したこ
とを特徴とする荷役作業機の速度制御装置。 A primary side port connected to a hydraulic pump and an oil tank, and a secondary side port connected to a hydraulic cylinder are provided in the valve body, and a throttle valve element is provided between each port on the primary side and secondary side of the valve body. and a valve seat, and a return flow spring that moves the throttle valve element away from the valve seat against low-pressure return oil from the hydraulic cylinder, and a return flow spring that resists the return flow spring with high-pressure return oil from the hydraulic cylinder. A speed control device for a cargo handling machine, characterized in that a throttle valve element is brought into contact with a valve seat to regulate the flow rate of high-pressure return oil from the cylinder to an oil tank.
JP1988082702U 1988-06-22 1988-06-22 Speed control device for cargo handling equipment Expired - Lifetime JPH0649594Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988082702U JPH0649594Y2 (en) 1988-06-22 1988-06-22 Speed control device for cargo handling equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988082702U JPH0649594Y2 (en) 1988-06-22 1988-06-22 Speed control device for cargo handling equipment

Publications (2)

Publication Number Publication Date
JPH024900U true JPH024900U (en) 1990-01-12
JPH0649594Y2 JPH0649594Y2 (en) 1994-12-14

Family

ID=31307444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988082702U Expired - Lifetime JPH0649594Y2 (en) 1988-06-22 1988-06-22 Speed control device for cargo handling equipment

Country Status (1)

Country Link
JP (1) JPH0649594Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012041190A (en) * 2010-08-17 2012-03-01 Jlg Ind Inc Mast lift with screw drive and gas strut

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4731572U (en) * 1971-04-23 1972-12-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4731572U (en) * 1971-04-23 1972-12-09

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012041190A (en) * 2010-08-17 2012-03-01 Jlg Ind Inc Mast lift with screw drive and gas strut

Also Published As

Publication number Publication date
JPH0649594Y2 (en) 1994-12-14

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