JPH0266780U - - Google Patents

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Publication number
JPH0266780U
JPH0266780U JP14301388U JP14301388U JPH0266780U JP H0266780 U JPH0266780 U JP H0266780U JP 14301388 U JP14301388 U JP 14301388U JP 14301388 U JP14301388 U JP 14301388U JP H0266780 U JPH0266780 U JP H0266780U
Authority
JP
Japan
Prior art keywords
casing
stepped piston
hole
plunger
diameter
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
JP14301388U
Other languages
Japanese (ja)
Other versions
JPH0717894Y2 (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 JP1988143013U priority Critical patent/JPH0717894Y2/en
Publication of JPH0266780U publication Critical patent/JPH0266780U/ja
Application granted granted Critical
Publication of JPH0717894Y2 publication Critical patent/JPH0717894Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Safety Valves (AREA)

Description

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

第１図は本考案の一実施例におけるリリーフ弁
の断面図、第２図は同実施例のダンピング機構の
要部断面図、第３図は同ダンピング機構の作用説
明図、第４図はダンピング室がない場合の段付ピ
ストンがストロークエンドに達した瞬間に段付ピ
ストンに作用する液圧の変動状態の説明図、第５
図は同リリーフ圧力の変動状態の説明図、第６図
はダンピング室を有する場合にリリーフ弁始動時
における段付ピストンに作用する液圧力と時間と
の関係の説明図、第７図は同リリーフ圧力と時間
との関係の説明図である。 １……ケーシング本体、２……流入孔、３……
シート、７……プランジヤ、８……貫通孔、９…
…絞り部、１０……段付ピストン、１１……液室
、１２……高圧ダンピング室、１３……ばね。 Fig. 1 is a sectional view of a relief valve according to an embodiment of the present invention, Fig. 2 is a sectional view of main parts of a damping mechanism of the same embodiment, Fig. 3 is an explanatory diagram of the operation of the damping mechanism, and Fig. 4 is a damping mechanism. Explanatory diagram of the fluctuating state of the hydraulic pressure acting on the stepped piston at the moment when the stepped piston reaches the stroke end when there is no chamber, 5th
The figure is an explanatory diagram of the fluctuation state of the relief pressure, Figure 6 is an explanatory diagram of the relationship between the fluid pressure acting on the stepped piston and time when starting the relief valve when the relief valve has a damping chamber, and Figure 7 is an explanatory diagram of the relationship between the relief pressure and time. FIG. 3 is an explanatory diagram of the relationship between pressure and time. 1...Casing body, 2...Inflow hole, 3...
Seat, 7...Plunger, 8...Through hole, 9...
... Throttle section, 10... Stepped piston, 11... Liquid chamber, 12... High pressure damping chamber, 13... Spring.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 流入側圧液の流入孔を形成する環状のシートが
一端に固着されかつ他端が閉塞された筒状のケー
シングと、一端部が大径に形成されて前記ケーシ
ングの一端部内周に摺動自在に嵌合するほぼ円柱
状のプランジヤと、一端側が小径に形成されかつ
前記ケーシングの他端部内周と前記プランジヤの
他端部外周との間に摺動自在に嵌合してケーシン
グの他端との間に液室を形成する筒状の段付ピス
トンと、この段付ピストンの外周の段部と前記ケ
ーシングの内周の段部とにより形成される環状の
高圧ダンピング室と、この高圧ダンピング室と前
記液室とを連通させる連通路とを設け、前記プラ
ンジヤに軸芯方向に沿う貫通孔を形成すると共に
この貫通孔の任意の箇所を微細孔にして絞り部を
形成し、前記段付ピストンの一端と前記プランジ
ヤの一端部との間にばねを介装し、前記段付ピス
トンの一端側の外径と前記流入孔の直径とをほぼ
等しくしたことを特徴とするリリーフ弁。 A cylindrical casing having an annular sheet forming an inflow hole for pressure liquid on the inflow side fixed at one end and closed at the other end, and one end formed with a large diameter so as to be slidable on the inner periphery of the one end of the casing. A substantially cylindrical plunger to be fitted, and one end formed with a small diameter and slidably fitted between the inner periphery of the other end of the casing and the outer periphery of the other end of the plunger, and the other end of the casing. A cylindrical stepped piston forming a liquid chamber therebetween; an annular high-pressure damping chamber formed by a step on the outer circumference of the stepped piston and a step on the inner circumference of the casing; A communication path is provided to communicate with the liquid chamber, a through hole is formed in the plunger along the axial direction, and an arbitrary part of the through hole is formed into a fine hole to form a constricted part, and the stepped piston is connected to the stepped piston. A relief valve characterized in that a spring is interposed between one end and one end of the plunger, and the outer diameter of the one end of the stepped piston is approximately equal to the diameter of the inflow hole.
JP1988143013U 1988-10-31 1988-10-31 Relief valve Expired - Lifetime JPH0717894Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988143013U JPH0717894Y2 (en) 1988-10-31 1988-10-31 Relief valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988143013U JPH0717894Y2 (en) 1988-10-31 1988-10-31 Relief valve

Publications (2)

Publication Number Publication Date
JPH0266780U true JPH0266780U (en) 1990-05-21
JPH0717894Y2 JPH0717894Y2 (en) 1995-04-26

Family

ID=31409453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988143013U Expired - Lifetime JPH0717894Y2 (en) 1988-10-31 1988-10-31 Relief valve

Country Status (1)

Country Link
JP (1) JPH0717894Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006057189A1 (en) * 2004-11-25 2006-06-01 Kayaba Industry Co., Ltd. Relief valve
CN112534168A (en) * 2019-04-20 2021-03-19 川崎重工业株式会社 Pressure relief valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102635473B1 (en) * 2019-01-29 2024-02-13 에이치디현대사이트솔루션 주식회사 Hydraulic valve and working machine having the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840664U (en) * 1981-09-11 1983-03-17 三菱重工業株式会社 relief valve
JPS63246579A (en) * 1987-04-01 1988-10-13 Toshiba Mach Co Ltd Relief valve of hydraulic motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840664U (en) * 1981-09-11 1983-03-17 三菱重工業株式会社 relief valve
JPS63246579A (en) * 1987-04-01 1988-10-13 Toshiba Mach Co Ltd Relief valve of hydraulic motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006057189A1 (en) * 2004-11-25 2006-06-01 Kayaba Industry Co., Ltd. Relief valve
CN112534168A (en) * 2019-04-20 2021-03-19 川崎重工业株式会社 Pressure relief valve

Also Published As

Publication number Publication date
JPH0717894Y2 (en) 1995-04-26

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