JPH0250449U - - Google Patents

Info

Publication number
JPH0250449U
JPH0250449U JP12764888U JP12764888U JPH0250449U JP H0250449 U JPH0250449 U JP H0250449U JP 12764888 U JP12764888 U JP 12764888U JP 12764888 U JP12764888 U JP 12764888U JP H0250449 U JPH0250449 U JP H0250449U
Authority
JP
Japan
Prior art keywords
pressure proportional
proportional control
control valve
switching valve
hydraulic circuit
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
JP12764888U
Other languages
English (en)
Other versions
JPH072732Y2 (ja
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 JP1988127648U priority Critical patent/JPH072732Y2/ja
Publication of JPH0250449U publication Critical patent/JPH0250449U/ja
Application granted granted Critical
Publication of JPH072732Y2 publication Critical patent/JPH072732Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)

Description

【図面の簡単な説明】
第１図は、本考案実施例に基づく圧力比例制御
弁を用いたブレード制御油圧回路図。第２図ａは
４位置切換弁の両端断面図。第２図ｂは“上”時
における４位置切換弁の一部断面図。第２図ｃは
“下”時における４位置切換弁の一部断面図。第
２図ｄは“浮”時における４位置切換弁の一部断
面図。第３図は圧力比例制御弁の性能図。第４図
は従来技術に基づくブレード制御油圧回路図であ
る。 １……４位置切換弁、２……圧力比例制御弁、
３……作業機ポンプ、４……油圧ポンプ、６……
ブレードシリンダー、７……バネ、８……バネ（
複合バネ）、９……バネ（複合バネ）、１０……
スプール、１７……入力レバー。

Claims (1)

    【実用新案登録請求の範囲】
  1. ４位置切換弁でブレードを制御するブルドーザ
    の油圧回路において、圧力比例制御弁を設けると
    共に、前記切換弁の一端のバネ室に複合バネを付
    設し、その両端のバネ室と前記圧力比例制御弁と
    をパイロツト油圧回路で接続したことを特徴とす
    る圧力比例制御弁を用いたブレード制御機構。
JP1988127648U 1988-09-29 1988-09-29 圧力比例制御弁を用いたブレード制御機構 Expired - Lifetime JPH072732Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988127648U JPH072732Y2 (ja) 1988-09-29 1988-09-29 圧力比例制御弁を用いたブレード制御機構

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988127648U JPH072732Y2 (ja) 1988-09-29 1988-09-29 圧力比例制御弁を用いたブレード制御機構

Publications (2)

Publication Number Publication Date
JPH0250449U true JPH0250449U (ja) 1990-04-09
JPH072732Y2 JPH072732Y2 (ja) 1995-01-25

Family

ID=31380265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988127648U Expired - Lifetime JPH072732Y2 (ja) 1988-09-29 1988-09-29 圧力比例制御弁を用いたブレード制御機構

Country Status (1)

Country Link
JP (1) JPH072732Y2 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5389207A (en) * 1977-01-14 1978-08-05 Komatsu Mfg Co Ltd Automatic controller for blade of bulldozer
JPS61206756U (ja) * 1985-06-12 1986-12-27
JPS6327571U (ja) * 1986-08-01 1988-02-23

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5389207A (en) * 1977-01-14 1978-08-05 Komatsu Mfg Co Ltd Automatic controller for blade of bulldozer
JPS61206756U (ja) * 1985-06-12 1986-12-27
JPS6327571U (ja) * 1986-08-01 1988-02-23

Also Published As

Publication number Publication date
JPH072732Y2 (ja) 1995-01-25

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