JPH0638165Y2 - The damper device in the flow control mechanism - Google Patents

The damper device in the flow control mechanism

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Publication number
JPH0638165Y2
JPH0638165Y2 JP1988100509U JP10050988U JPH0638165Y2 JP H0638165 Y2 JPH0638165 Y2 JP H0638165Y2 JP 1988100509 U JP1988100509 U JP 1988100509U JP 10050988 U JP10050988 U JP 10050988U JP H0638165 Y2 JPH0638165 Y2 JP H0638165Y2
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Prior art keywords
spool
orifice
pressure fluid
valve body
control mechanism
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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.)
Active
Application number
JP1988100509U
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Japanese (ja)
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JPH0222481U (en
Inventor
正 三田村
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カヤバ工業株式会社
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Priority to JP1988100509U priority Critical patent/JPH0638165Y2/en
Publication of JPH0222481U publication Critical patent/JPH0222481U/ja
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Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、圧力流体流入路からの圧油によってスプールを切換制御させるようにした流量制御機構に関し、当該スプールが切換わり、通常位置へと復帰する際、温度変化に影響を受けることなくスムーズに復帰動作できることを可能にしたものに関する。 Description of the invention The present invention (relates) relates to a flow control mechanism so as to change control spool by pressure oil from the pressure fluid inlet channel, the spool is switched, to the normal position when returning, to which made it possible to be return operation smoothly without being affected by temperature changes.

(従来の技術と考案が解決しようとする問題点) 従来、例えば、農業用トラクタのように1台のポンプでパワーステアリング装置のパワーシリンダと他の作業機とを作動させるような場合には、流量制御機構が使用される。 (Problems devised the prior art to be solved) Conventionally, for example, if a single pump as agricultural tractors such as actuating the power cylinder and the other working machine power steering apparatus, the flow control mechanism is used. この流量制御機構は、所定のポートを備えたハウジング内に、スプールを移動自在に収容し、上記スプールを流体圧により適宜移動させ、圧力流体を所定のポートを介して供給するものである。 The flow control mechanism in a housing having a predetermined port, and movably accommodating the spool, the spool is moved appropriately by the fluid pressure, and supplies the pressure fluid through a predetermined port.

そして、上記従来の流量制御機構にあっては、スプールが切換り、もとの状態に復帰する際、ハンチング等を起こさないよう、当該スプールにオリフィスからなるダンパ装置を設けているのが通常であるが、しかしこのようなオリフィスを利用するものでは、圧力流体の温度が低い場合、流体の粘性が大きくなり、スプールの戻り特性が悪くなるばかりか、逆に高温時には、粘性が低下するためスプールが振動してしまうといった問題があった。 Then, the in the conventional flow control mechanism, the spool is Setsu換Ri, when returning to the original state, so as not to cause hunting, the is provided a damper apparatus comprising an orifice to the spool in the normal spool for some, but makes use of such orifices, when the temperature of the pressure fluid is low, the viscosity of the fluid is increased, not only the return characteristic of the spool is deteriorated, at the time of high temperature Conversely, viscosity decreases but there has been a problem that the vibration.

本考案はこのような問題点を解決するためになされたもので、その目的とするところは、圧力流体の温度変化に拘らず、上記スプールの戻り特性を良好に保てるような流量制御機構におけるダンパ装置を提供することにある。 This invention has been made to solve the above problems, it is an object regardless of a temperature change of the pressure fluid, the damper in the flow control mechanism such as keep good return characteristics of the spool to provide an apparatus.

(問題を解決するための手段) 上記目的を達成するため、本願考案によるダンパ装置は、圧力流体が流入する圧力流体流入路からの圧油によって切換制御されるスプールの端部にダンパ室を形成し、当該ダンパ室をスプールに穿ったオリフィスを介して互いに連通させるようにしてなる流量制御機構を前提としつつ、 上記ダンパ室内に弁体を介装し、当該弁体に上記スプールに穿ったオリフィスよりも小径なオリフィスを穿設するとともに、当該弁体を、形状記憶合金で構成したスプリングを介してオリフィス側へと押圧することを特徴とするものである。 (Means for Solving the Problems) To achieve the above object, the damper device according to the present invention may form a damper chamber end of the spool to be switched controlled by pressure oil from the pressure fluid inlet channel which the pressure fluid flows and, while assuming the flow rate control mechanism comprising so as to communicate with each other via an orifice bored the damper chamber to the spool, interposed valve body to the damper chamber, bored to the spool in the valve body orifice with bored small diameter orifice than the valve body, it is characterized in that the pressing to the orifice side through the spring is constituted by a shape memory alloy.

(作用) スプールの復帰作動時、圧力流体の温度が予め設定された温度以下になった場合、弁体を押圧する形状記憶合金からなるスプリングが収縮し、スプールに穿ったオリフィスによるダンパ機能を発揮させ、応答性の向上を図ることができ、又、温度が設定以上に上昇した場合には、 Time (action) of the spool return operation, when the temperature of the pressure fluid falls below a preset temperature, the spring is contracted to a shape memory alloy which presses the valve body, exhibit a damper function by orifices bored in spool is, it is possible to improve the responsiveness, also, when the temperature rises above configuration,
上記弁体がスプリングによりスプールに穿ったオリフィスへと押圧されるために、今度は弁体に穿ったオリフィスが作用して、スプールに生じる振動を防止する。 To the valve body is pressed into the orifice bored in spool by the spring, this time to effect orifice bored in the valve body to prevent vibration generated in the spool.

(実施例) 以下第1図を参照して、本考案の実施例を説明する。 (Example) With reference to Figure 1 below, a description will be given of an embodiment of the present invention.

図は、本実施例のダンパ装置を適用した流量制御機構の構成を示す断面図であり、図中符号1はハウジングである。 Figure is a cross-sectional view showing the structure of a flow control mechanism to which the damper apparatus of the present embodiment, reference numeral 1 is a housing. 上記ハウジング1には、圧力流体流入ポート(図中 To the housing 1, the pressure fluid inlet port (figure
INで示す)3、図示しないパワーシリンダに圧力流体を供給する制御流ポート(図中PFで示す)5、余剰の圧力流体を排出する余剰流ポート(図中EFで示す)7、及び圧力流体を図示しないタンクに戻す戻りポート(図中T Indicated by IN) 3, indicated by unillustrated power cylinder during the control flow port (Fig supplying pressure fluid PF) 5, shown in surplus flow port (figure EF for discharging the excess pressure fluid) 7 and the pressure fluid, returned to tank (not shown) to return port (figure T
で示す)9がそれぞれ形成されている。 Indicated by) 9 are formed.

上記ハウジング1内にはスプール摺動室11が形成されていて、このスプール摺動室11内にはスプール13が図中左右方向に摺動可能に収容されている。 The above housing 1 have spool sliding chamber 11 is formed, a spool 13 is slidably housed in the lateral direction in the drawing on the spool sliding chamber 11. 上記スプール13の図中左側には中空部14が形成されており、この中空部14 On the left side in the figure of the spool 13 and the hollow portion 14 is formed, the hollow portion 14
は段付き構造となっている。 It has a stepped structure. そして中空部14にスプリング15が収容され、このスプリング15の図中左端はハウジング1に当接しており、一方右端は上記段付き部に当接している。 The spring 15 is accommodated in the hollow portion 14, left end in the drawing of the spring 15 is in contact with the housing 1, whereas the right end is in contact with the stepped portion. スプール13はこのスプリング15により常時図中右方向に付勢されている。 Spool 13 is biased in the right direction all the time diagram by the spring 15. 又、上記中空部14の図中右側端面には制御オリフィス17が形成されている。 Also, in the figure right end face of the hollow portion 14 control orifice 17 is formed.

上記スプール13には前記圧力流体流入ポート3に連通する流路25が形成されており、圧力流体流入ポート3を介してハウジング1内に流入した圧力流体はこの流路25を介して上記制御オリフィス17に流入していく。 The the spool 13 is formed with a passage 25 communicating with the pressure fluid inlet port 3, the control orifice pressure fluid through the flow path 25 that has flowed into the housing 1 through the pressure fluid inlet port 3 It continues to flow into the 17.

又、スプール13の図中右側端部には流路27がスプール13 Further, the flow passage 27 in the figure the right end of the spool 13 the spool 13
の軸方向に形成されており、この流路27を介して圧力流体流入ポート3とスプール13及びハウジング1間のダンパ室29とが連通している。 It is formed in the axial direction, and a damper chamber 29 between the pressure fluid inlet port 3 and the spool 13 and the housing 1 communicate with each other through the flow channel 27.

又、前記弁体61が配置されている位置及びその近傍位置のスプール13は縮径されていて環状溝31が形成されている。 Further, the spool 13 of the position and its vicinity the valve body 61 is arranged an annular groove 31 has a reduced diameter is formed. この環状溝31が前記余剰流ポート7への流路になる。 The annular groove 31 is in the flow path to the surplus flow port 7.

尚、上記スプール13の図中上方位置のハウジング1内には弁機構33が設けられており、この弁機構33は弁体35とスプリング37とから構成されている。 Incidentally, in the housing 1 in the figure above the said spool 13 is provided with a valve mechanism 33, the valve mechanism 33 is composed of valve body 35 and a spring 37.. この弁機構33が開弁することにより前記戻りポート9を介して圧力流体がタンクに戻る。 Pressure fluid through the return port 9 by the valve mechanism 33 is opened is returned to the tank.

上記構成によると、図示しないポンプから吐出された圧力流体は圧力流体流入ポート3を介してハウジング1内に流入し、流路25、制御オリフィス17、流路27及び制御流ポート5を介してパワーシリンダに供給される。 According to the above construction, the pressure fluid discharged from the pump (not shown) flows into the housing 1 through the pressure fluid inlet port 3, the passage 25, the control orifice 17, through the passage 27 and the control flow port 5 Power It is supplied to the cylinder. その際、圧力流体の一部は流路27を介してダンパ室29内にも流入し、その結果スプール13に背圧が作用する。 At that time, a portion of the pressure fluid also flows into the damper chamber 29 through the passage 27, the back pressure acts on the result spool 13. この背圧とスプリング15のスプリング力とによりスプール13の位置は決定される。 The position of the spool 13 by the spring force of the back pressure and the spring 15 are determined. そしてスプール13は例えば図示するような状態に保持され、余分な圧力流体は環状溝31及び余剰流ポート7を介して排出される。 The spool 13 is held in a state as illustrated for example, excess pressure fluid is discharged through the annular groove 31 and the surplus flow port 7. かかる作用により上記パワーシリンダに所定量の圧力流体が供給される。 A predetermined amount of pressure fluid to the power cylinder is supplied by such action.

一方、スプール13の図中右端のダンパ室29内には弁体61 On the other hand, in the figure the right end of the damper chamber 29 of the spool 13 the valve body 61
がスプリング63に付勢された状態で設置されている。 There are disposed in a state of being urged by the spring 63.
又、流路25の図中右側に位置する壁面にはオリフィス65 Further, the orifice 65 in the wall surface located on the right side in the drawing of the flow channel 25
が形成されており、一方上記弁体61にはオリフィス65よりも小径のオリフィス67が上記オリフィス65と同心に形成されている。 There are formed, whereas the small-diameter orifice 67 of the orifice 65 in the valve body 61 is formed concentrically with the orifice 65. 上記スプリング63は形状記憶合金から形成されており、予め設定された温度以下になると軸方向に収縮するものである。 The spring 63 is formed from a shape memory alloy, it is to shrink axially and becomes equal to or less than the preset temperature.

上記構成によると、高温時にはオリフィス65部分における流路面積が弁体61のオリフィス67によって決まるため、スプール13の図中右方向への復帰動作に対する緩衝機能が効果的に発揮される。 According to the above configuration, the flow path area of ​​the orifice 65 portion at a high temperature for determined by the orifice 67 of the valve body 61, a buffer function for the returning operation to the right in the drawing direction of the spool 13 is effectively exhibited. 一方、低温時にはスプリング63が収縮して弁体61に対する付勢力が低下するので弁体61が図中右方向に移動し、それによってオリフィス65 On the other hand, the valve element 61 is moved rightward in the drawing since the spring 63 at the time of low temperature biasing force decreases with respect to the valve body 61 contracts, whereby the orifice 65
部分における流路面積が拡大される。 Flow passage area is enlarged in the portion. これによって応答性の低下が防止される。 This decrease in responsiveness by is prevented.

(考案の効果) 以上詳述したように本考案によるダンパ装置によると、 According to the damper device according to the present invention as described in detail (invented effect) or more,
流体の温度の変化に拘らず、所望の動作を提供することができるので、適用対象の機器の信頼性を向上させることができる。 Regardless of the change in temperature of the fluid, it is possible to provide a desired operation, it is possible to improve the reliability of the application of the equipment.

【図面の簡単な説明】 第1図は本考案の第1実施例による流量制御機構の断面図である。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the flow control mechanism according to a first embodiment of the present invention. 13……スプリング、29……ダンパ室、61……弁体、63… 13 ...... spring, 29 ...... damper chamber, 61 ...... valve body, 63 ...
…スプリング、65……オリフィス、67……オリフィス。 ... spring, 65 ...... orifice, 67 ...... orifice.

Claims (1)

    【実用新案登録請求の範囲】 [Range of utility model registration request]
  1. 【請求項1】圧力流体が流入する圧力流体流入路からの圧油によって切換制御されるスプールの端部にダンパ室を形成し、当該ダンパ室をスプールに穿ったオリフィスを介して互いに連通させるようにしてなる流量制御機構において、上記ダンパ室内に弁体を介装し、当該弁体に上記スプールに穿ったオリフィスよりも小径なオリフィスを穿設するとともに、当該弁体を、形状記憶合金で構成したスプリングを介し上記オリフィス側へと押圧するようにしたことを特徴とする流量制御機構におけるダンパ装置。 1. A forming a damper chamber in the end of the spool to be switched controlled by pressure oil from the pressure fluid inlet passage pressure fluid flows, so as to communicate with each other via an orifice bored the damper chamber to the spool in the flow control mechanism is formed by the configuration interposed valve body to the damper chamber, with bored small diameter orifice than orifices bored in the spool in the valve body, the valve body, a shape memory alloy the damper device in the flow control mechanism characterized by the that it has to press into the orifice side via a spring.
JP1988100509U 1988-07-28 1988-07-28 The damper device in the flow control mechanism Active JPH0638165Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988100509U JPH0638165Y2 (en) 1988-07-28 1988-07-28 The damper device in the flow control mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988100509U JPH0638165Y2 (en) 1988-07-28 1988-07-28 The damper device in the flow control mechanism

Publications (2)

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JPH0222481U JPH0222481U (en) 1990-02-14
JPH0638165Y2 true JPH0638165Y2 (en) 1994-10-05

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US8850477B2 (en) 1995-10-02 2014-09-30 Starsight Telecast, Inc. Systems and methods for linking television viewers with advertisers and broadcasters
US8904441B2 (en) 2003-11-06 2014-12-02 United Video Properties, Inc. Systems and methods for providing program suggestions in an interactive television program guide
US9021538B2 (en) 1998-07-14 2015-04-28 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9113107B2 (en) 2005-11-08 2015-08-18 Rovi Guides, Inc. Interactive advertising and program promotion in an interactive television system
US9113207B2 (en) 1995-10-02 2015-08-18 Rovi Guides, Inc. Systems and methods for contextually linking television program information
US9166714B2 (en) 2009-09-11 2015-10-20 Veveo, Inc. Method of and system for presenting enriched video viewing analytics
US9172987B2 (en) 1998-07-07 2015-10-27 Rovi Guides, Inc. Methods and systems for updating functionality of a set-top box using markup language
US9191722B2 (en) 1997-07-21 2015-11-17 Rovi Guides, Inc. System and method for modifying advertisement responsive to EPG information
US9197943B2 (en) 1998-12-03 2015-11-24 Rovi Guides, Inc. Electronic program guide with related-program search feature
US9204184B2 (en) 1998-07-17 2015-12-01 Rovi Guides, Inc. Interactive television program guide with remote access
US9215504B2 (en) 2006-10-06 2015-12-15 Rovi Guides, Inc. Systems and methods for acquiring, categorizing and delivering media in interactive media guidance applications
US9288521B2 (en) 2014-05-28 2016-03-15 Rovi Guides, Inc. Systems and methods for updating media asset data based on pause point in the media asset
US9294799B2 (en) 2000-10-11 2016-03-22 Rovi Guides, Inc. Systems and methods for providing storage of data on servers in an on-demand media delivery system
US9319735B2 (en) 1995-06-07 2016-04-19 Rovi Guides, Inc. Electronic television program guide schedule system and method with data feed access
US9326025B2 (en) 2007-03-09 2016-04-26 Rovi Technologies Corporation Media content search results ranked by popularity
US9369741B2 (en) 2003-01-30 2016-06-14 Rovi Guides, Inc. Interactive television systems with digital video recording and adjustable reminders
US9402102B2 (en) 1995-10-02 2016-07-26 Rovi Guides, Inc. System and method for using television schedule information
US9426509B2 (en) 1998-08-21 2016-08-23 Rovi Guides, Inc. Client-server electronic program guide

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JPS59110772U (en) * 1983-01-18 1984-07-26
JPS6117788A (en) * 1984-07-03 1986-01-25 Matsushita Electric Ind Co Ltd Expansion valve
JPS6263487U (en) * 1985-10-14 1987-04-20
JPH0543229Y2 (en) * 1986-10-14 1993-10-29

Cited By (22)

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US9319735B2 (en) 1995-06-07 2016-04-19 Rovi Guides, Inc. Electronic television program guide schedule system and method with data feed access
US8850477B2 (en) 1995-10-02 2014-09-30 Starsight Telecast, Inc. Systems and methods for linking television viewers with advertisers and broadcasters
US9402102B2 (en) 1995-10-02 2016-07-26 Rovi Guides, Inc. System and method for using television schedule information
US9113207B2 (en) 1995-10-02 2015-08-18 Rovi Guides, Inc. Systems and methods for contextually linking television program information
US9191722B2 (en) 1997-07-21 2015-11-17 Rovi Guides, Inc. System and method for modifying advertisement responsive to EPG information
US9172987B2 (en) 1998-07-07 2015-10-27 Rovi Guides, Inc. Methods and systems for updating functionality of a set-top box using markup language
US9154843B2 (en) 1998-07-14 2015-10-06 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9232254B2 (en) 1998-07-14 2016-01-05 Rovi Guides, Inc. Client-server based interactive television guide with server recording
US9021538B2 (en) 1998-07-14 2015-04-28 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9226006B2 (en) 1998-07-14 2015-12-29 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9204184B2 (en) 1998-07-17 2015-12-01 Rovi Guides, Inc. Interactive television program guide with remote access
US9426509B2 (en) 1998-08-21 2016-08-23 Rovi Guides, Inc. Client-server electronic program guide
US9197943B2 (en) 1998-12-03 2015-11-24 Rovi Guides, Inc. Electronic program guide with related-program search feature
US9294799B2 (en) 2000-10-11 2016-03-22 Rovi Guides, Inc. Systems and methods for providing storage of data on servers in an on-demand media delivery system
US9369741B2 (en) 2003-01-30 2016-06-14 Rovi Guides, Inc. Interactive television systems with digital video recording and adjustable reminders
US8904441B2 (en) 2003-11-06 2014-12-02 United Video Properties, Inc. Systems and methods for providing program suggestions in an interactive television program guide
US9191719B2 (en) 2003-11-06 2015-11-17 Rovi Guides, Inc. Systems and methods for providing program suggestions in an interactive television program guide
US9113107B2 (en) 2005-11-08 2015-08-18 Rovi Guides, Inc. Interactive advertising and program promotion in an interactive television system
US9215504B2 (en) 2006-10-06 2015-12-15 Rovi Guides, Inc. Systems and methods for acquiring, categorizing and delivering media in interactive media guidance applications
US9326025B2 (en) 2007-03-09 2016-04-26 Rovi Technologies Corporation Media content search results ranked by popularity
US9166714B2 (en) 2009-09-11 2015-10-20 Veveo, Inc. Method of and system for presenting enriched video viewing analytics
US9288521B2 (en) 2014-05-28 2016-03-15 Rovi Guides, Inc. Systems and methods for updating media asset data based on pause point in the media asset

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Publication number Publication date
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