JPH06241207A - Linear servo valve - Google Patents

Linear servo valve

Info

Publication number
JPH06241207A
JPH06241207A JP2796793A JP2796793A JPH06241207A JP H06241207 A JPH06241207 A JP H06241207A JP 2796793 A JP2796793 A JP 2796793A JP 2796793 A JP2796793 A JP 2796793A JP H06241207 A JPH06241207 A JP H06241207A
Authority
JP
Japan
Prior art keywords
spool
bobbin
rotary shaft
servo valve
friction
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
JP2796793A
Other languages
Japanese (ja)
Inventor
Toshimitsu Kitamura
利光 北村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amada Co Ltd
Original Assignee
Amada Co Ltd
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 Amada Co Ltd filed Critical Amada Co Ltd
Priority to JP2796793A priority Critical patent/JPH06241207A/en
Publication of JPH06241207A publication Critical patent/JPH06241207A/en
Pending legal-status Critical Current

Links

Landscapes

  • Servomotors (AREA)

Abstract

PURPOSE:To enable a lightweighted linear servo valve by providing spiral grooves on a spool for opening/closing a valve seat and displacing a bobbin and the spool by the rotation of a rotary shaft penetrated through the interior of a linear motor, generated by screw-operation, so as to decrease friction and prevent a large-sized spool. CONSTITUTION:A plurality of spiral grooves 35 are provided on a spool 25 of a valve portion 5. The spool 25 is rotated by a drive source 31 of a motor portion 3 through a rotary shaft 29, so as to displace a bobbin 7 and the spool 25 by screw-operation. Therefor, the solid friction between a cylindrical hole 17 and the spool 25 is converted into the viscous friction, and the frictional force is negligibly decreased. Thereby, friction can be decreased even if the spool 25 receives large fluid pressure.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、圧力油の流路である弁
座の開閉動作が、スプールの軸方向移動により行うため
に、駆動源としてリニアモータのコイルを配置したボビ
ンが結合されているリニアサーボバルブに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a bobbin in which a coil of a linear motor is arranged as a drive source for opening and closing a valve seat, which is a passage for pressure oil, by axially moving a spool. Regarding linear servo valve.

【0002】[0002]

【従来の技術】従来公知のリニアサーボバルブは、図示
省略するも、弁座の開閉動作を軸方向の移動により行う
スプールに、リニアモータのコイルを配置したボビンが
結合されていて、駆動永久磁石に対向して配置されてい
るコイルに電流を流すことにより、コイルに推力を生成
せしめて、スプールの開閉動作(往復動作)が行われて
いた。
2. Description of the Related Art In a conventionally known linear servo valve, a bobbin in which a coil of a linear motor is arranged is connected to a spool for opening / closing a valve seat by axial movement, though not shown. By causing an electric current to flow through the coil disposed so as to face the coil, a thrust force is generated in the coil, and the spool opening / closing operation (reciprocating operation) is performed.

【0003】[0003]

【発明が解決しようとする課題】ところで、従来のスプ
ールの形状または動作方法には、スプールが大きな流体
圧を受けるものであるために、耐汚染性、応答性等に限
界があった。
By the way, in the conventional spool shape or operating method, since the spool is subjected to a large fluid pressure, there is a limit in stain resistance, responsiveness and the like.

【0004】直動形サーボ弁用アクチュエータとして、
ソレノイドまたはリニア直流モータ等が採用されている
が、スプールが受ける流体圧以上の推力がアクチュエー
タには必要とされるために、アクチュエータが大型化す
る原因となっていた。
As a direct acting servo valve actuator,
Although a solenoid, a linear DC motor, or the like is used, the actuator requires a larger thrust than the fluid pressure received by the spool, which causes the actuator to become large.

【0005】本発明の目的は、上記問題点を改善するた
めに、スプールが大きな流体圧を受けるとも、摩擦が低
減され、スプールが大型化されることなく、重量が軽減
化され、耐汚染性および応答性が向上されるリニアサー
ボバルブを提供することである。
In order to solve the above problems, an object of the present invention is to reduce friction even if a spool is subjected to a large fluid pressure, reduce the weight without increasing the size of the spool, and reduce the pollution resistance. And to provide a linear servo valve with improved responsiveness.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、圧力油の流路である弁座の開閉動作を、
軸方向の移動により行うスプールに、リニアモータ内の
コイルを配置したボビンが結合されているリニアサーボ
バルブにおいて、前記スプールに設けられた螺旋溝と、
前記スプールに直結され前記リニアモータ内を貫通する
回転軸と、前記回転軸を回転させて前記ボビンとスプー
ルとをスクリュー動作で変位させる駆動源とを備えるこ
とを特徴とするリニアサーボバルブである。
In order to achieve the above object, the present invention provides an opening / closing operation of a valve seat, which is a passage for pressure oil.
In a linear servo valve in which a bobbin in which a coil in a linear motor is arranged is connected to a spool that is moved by an axial movement, a spiral groove provided in the spool,
A linear servo valve, comprising: a rotary shaft that is directly connected to the spool and penetrates through the linear motor; and a drive source that rotates the rotary shaft to displace the bobbin and the spool by a screw operation.

【0007】本発明の他の態様によれば、回転軸を通し
てボビンおよびコイル自体に常時回転を与えるスリップ
リングを設ける。
According to another aspect of the invention, a slip ring is provided which provides constant rotation to the bobbin and the coil itself through the rotary shaft.

【0008】[0008]

【作用】本発明のリニアサーボバルブを採用することに
より、圧力油の流路である弁座の開閉動作を、軸方向の
移動により行うスプールに、リニアモータ内のコイルを
配置したボビンが結合されて、前記スプールに螺旋溝を
設け、前記スプールに直結され前記リニアモータ内を貫
通する回転軸を設け、前記回転軸を回転させて前記ボビ
ンとスプールとをスクリュー動作で変位させる駆動源を
設け、回転軸を通してボビンおよびコイル自体に常時回
転を与えるスリップリングを設けることによって、スプ
ールが大きな流体圧を受けるとも、その摩擦が減少さ
れ、スプールが大型化されることなく、重量が軽減化さ
れ、耐汚染性、応答性および放熱性が向上される。
By adopting the linear servo valve of the present invention, the bobbin in which the coil in the linear motor is arranged is connected to the spool that opens and closes the valve seat, which is the flow path of pressure oil, by axial movement. A spiral groove is provided in the spool, a rotary shaft that is directly connected to the spool and penetrates through the linear motor is provided, and a drive source that rotates the rotary shaft to displace the bobbin and the spool by a screw operation is provided. By providing a slip ring that constantly rotates the bobbin and the coil itself through the rotating shaft, even when the spool receives a large fluid pressure, its friction is reduced, the spool is not enlarged, and the weight is reduced, and the durability is improved. Contamination, responsiveness and heat dissipation are improved.

【0009】[0009]

【実施例】以下、本発明の実施例を図面に基づいて、詳
細に説明する。
Embodiments of the present invention will now be described in detail with reference to the drawings.

【0010】図1は本発明のリニアサーボバルブの正面
断面図を示す。図においてリニアサーボバルブ1は、主
としてモータ部3と、弁部5およびセンサ部6とから構
成されている。モータ部3は、図の左側に設けられ、中
空円筒状に形成されたボビン7と、このボビン7に巻回
された複数組のコイル9と、コイル9の外周方向の外側
に配置された駆動磁石11とから構成されている。駆動
磁石11とボビン7およびコイル9とは、非磁性体から
なるモータ側ブロック体13に設けられた中空円筒状凹
部A内に収容されている。
FIG. 1 is a front sectional view of a linear servo valve of the present invention. In the figure, the linear servo valve 1 is mainly composed of a motor section 3, a valve section 5 and a sensor section 6. The motor unit 3 is provided on the left side of the drawing, and has a hollow cylindrical bobbin 7, a plurality of sets of coils 9 wound around the bobbin 7, and a drive arranged outside the coil 9 in the outer peripheral direction. It is composed of a magnet 11. The drive magnet 11, the bobbin 7, and the coil 9 are housed in a hollow cylindrical recess A provided in the motor-side block body 13 made of a non-magnetic material.

【0011】弁部5は、図の中央部に設けられ、弁座側
ブロック体15内に形成された円筒状穴(スリーブ)1
7と、この円筒状穴17に設けられた油流入穴19、油
流出穴21からなる弁座23と、円筒状穴17に密嵌で
きて弁座23を開放または閉鎖できるスプール25とに
よって構成されている。ボビン7の右端中央部は、ネジ
27によってスプール25に結合されている。
The valve portion 5 is provided in the central portion of the drawing, and is a cylindrical hole (sleeve) 1 formed in the valve seat side block body 15.
7, a valve seat 23 formed of an oil inflow hole 19 and an oil outflow hole 21 provided in the cylindrical hole 17, and a spool 25 capable of being tightly fitted in the cylindrical hole 17 and opening or closing the valve seat 23. Has been done. The central portion of the right end of the bobbin 7 is coupled to the spool 25 with a screw 27.

【0012】複数のコイル9に順次、交流電流を流すこ
とによって、コイル9にスプール25の軸方向である図
1の左右方向に推力が発生し、スプール25が円筒状穴
17に沿って移動する。これによって、例えば通電前で
は図1に示すように、スプール25によって油流入穴1
9が塞がれて弁座23は閉鎖されているが、通電によっ
てスプール25が軸方向へ僅かに移動し、油流入穴19
と油流出穴21とが連通して弁座23は開放されるもの
である。
By sequentially applying an alternating current to the plurality of coils 9, thrust is generated in the coils 9 in the left-right direction of FIG. 1, which is the axial direction of the spool 25, and the spool 25 moves along the cylindrical hole 17. . As a result, for example, before energization, as shown in FIG.
9 is closed and the valve seat 23 is closed, but the spool 25 is slightly moved in the axial direction by energization, and the oil inlet hole 19
And the oil outflow hole 21 communicate with each other, and the valve seat 23 is opened.

【0013】また、モータ部3には、モータ側ブロック
体13内を貫通する回転軸29の一端がスプール25に
直結して設けられ、他端にモータ、空気圧または油圧等
の駆動源31が結合されている。
Further, in the motor section 3, one end of a rotary shaft 29 penetrating the inside of the motor side block body 13 is provided directly connected to the spool 25, and a drive source 31 such as a motor, air pressure or hydraulic pressure is connected to the other end. Has been done.

【0014】なお、回転軸29を通じて、スリップリン
グ33が設けられ、ボビン7およびコイル9自体に常時
回転を与え、モータ部3内の空間部Aの温度上昇および
コイル9の温度上昇を抑制し、その放熱性を向上するも
のとする。
A slip ring 33 is provided through the rotary shaft 29 to constantly rotate the bobbin 7 and the coil 9 itself to suppress the temperature rise of the space A in the motor unit 3 and the temperature rise of the coil 9. Its heat dissipation property should be improved.

【0015】さらに、弁部5のスプール25には、図示
するような複数の螺旋溝35が設けられている。モータ
部3の駆動源31が回転軸29を介して、スプール25
を回転させることにより、ボビン7およびスプール25
をスクリュー動作で変位させるものである。
Further, the spool 25 of the valve portion 5 is provided with a plurality of spiral grooves 35 as shown in the drawing. The drive source 31 of the motor unit 3 is driven by the spool 25 via the rotary shaft 29.
By rotating the bobbin 7 and the spool 25.
Is displaced by a screw operation.

【0016】このために、円筒状穴17とスプール25
との間の固体摩擦を粘性摩擦に変換させ、その摩擦力を
無視できる程小さくする。従って、スプールが大きな流
体圧を受けるとも、その摩擦が減少され、スプールが大
型化されることなく、その重量が軽減化され、耐汚染性
および応答性が向上される。
For this purpose, the cylindrical hole 17 and the spool 25
The solid friction between and is converted into viscous friction, and the frictional force is made negligibly small. Therefore, even if the spool is subjected to a large fluid pressure, its friction is reduced, the spool is not enlarged, and its weight is reduced, so that the stain resistance and the responsiveness are improved.

【0017】センサブ6は、図の右側に設けられ、セン
サ、本実施例では差動トランス37がスプール25に直
結して設けられ、スプール25の移動位置を検出するも
のである。
The sensor 6 is provided on the right side of the drawing, and a sensor, in this embodiment, a differential transformer 37 is directly connected to the spool 25 to detect the moving position of the spool 25.

【0018】なお、本発明は、上記実施例に限定される
ものではなく、適宜の設計的変更を行うことにより、他
の態様においても実施し得るもので、同様な構成、作
用、方法からなる装置にも適用することが可能である。
The present invention is not limited to the above-mentioned embodiments, but can be carried out in other modes by making appropriate design changes, and has the same structure, operation and method. It can also be applied to a device.

【0019】[0019]

【発明の効果】上述の説明ですでに明らかなように、本
発明のリニアサーボバルブは、圧力油の流路である弁座
の開閉動作を、軸方向の移動により行うスプールに、リ
ニアモータ内のコイルを配置したボビンが結合されて、
前記スプールに螺旋溝を設け、前記スプールに直結され
前記リニアモータ内を貫通する回転軸を設け、前記回転
軸を回転させて前記ボビンとスプールとをスクリュー動
作で変位させる駆動源を設け、回転軸を通してボビンお
よびコイル自体に常時回転を与えるスリップリングを設
けることによって、従来技術の問題点が有効に解決さ
れ、スプールが大きな流体圧を受けるとも、その摩擦が
減少され、スプールが大型化されることなく、重量が軽
減化され、耐汚染性、応答性および放熱性が向上され
る。
As is apparent from the above description, the linear servo valve according to the present invention has a linear motor inside a linear motor which is mounted on a spool for opening and closing a valve seat, which is a passage for pressure oil, by axial movement. The bobbin on which the coil of
A spiral groove is provided in the spool, a rotary shaft that is directly connected to the spool and penetrates through the linear motor is provided, and a drive source that rotates the rotary shaft to displace the bobbin and the spool by a screw operation is provided. By providing a slip ring that constantly rotates the bobbin and the coil itself, the problems of the prior art are effectively solved, and even when the spool receives a large fluid pressure, its friction is reduced and the spool is enlarged. In addition, the weight is reduced, and the stain resistance, responsiveness and heat dissipation are improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のリニアサーボバルブの正面断面図であ
る。
FIG. 1 is a front sectional view of a linear servo valve of the present invention.

【符号の説明】[Explanation of symbols]

1 リニアサーボバルブ 3 モータ部 5 弁部 7 ホビン 9 コイル 17 円筒状穴 23 弁座 25 スプール 29 回転軸 31 駆動源 35 螺旋溝 1 Linear Servo Valve 3 Motor Section 5 Valve Section 7 Hobbin 9 Coil 17 Cylindrical Hole 23 Valve Seat 25 Spool 29 Rotating Shaft 31 Drive Source 35 Spiral Groove

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 圧力油の流路である弁座の開閉動作を、
軸方向の移動により行うスプールに、リニアモータ内の
コイルを配置したボビンが結合されているリニアサーボ
バルブにおいて、前記スプールに設けられた螺旋溝と、
前記スプールに直結され前記リニアモータ内を貫通する
回転軸と、前記回転軸を回転させて前記ボビンとスプー
ルとをスクリュー動作で変位させる駆動源とを備えるこ
とを特徴とするリニアサーボバルブ。
1. An opening / closing operation of a valve seat, which is a flow path of pressure oil,
In a linear servo valve in which a bobbin in which a coil in a linear motor is arranged is connected to a spool that is moved by an axial movement, a spiral groove provided in the spool,
A linear servo valve comprising: a rotary shaft that is directly connected to the spool and penetrates through the linear motor; and a drive source that rotates the rotary shaft to displace the bobbin and the spool by a screw operation.
【請求項2】 請求項1の記載において、回転軸を通し
てボビンおよびコイル自体に常時回転を与えるスリップ
リングを設けることを特徴とするリニアサーボバルブ。
2. The linear servo valve according to claim 1, further comprising a slip ring for constantly rotating the bobbin and the coil itself through a rotary shaft.
JP2796793A 1993-02-17 1993-02-17 Linear servo valve Pending JPH06241207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2796793A JPH06241207A (en) 1993-02-17 1993-02-17 Linear servo valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2796793A JPH06241207A (en) 1993-02-17 1993-02-17 Linear servo valve

Publications (1)

Publication Number Publication Date
JPH06241207A true JPH06241207A (en) 1994-08-30

Family

ID=12235667

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2796793A Pending JPH06241207A (en) 1993-02-17 1993-02-17 Linear servo valve

Country Status (1)

Country Link
JP (1) JPH06241207A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7735517B2 (en) 2006-12-22 2010-06-15 Caterpillar Inc Rotary-actuated electro-hydraulic valve
GB2515055A (en) * 2013-06-12 2014-12-17 Blagdon Actuation Res Ltd Servo Valves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7735517B2 (en) 2006-12-22 2010-06-15 Caterpillar Inc Rotary-actuated electro-hydraulic valve
GB2515055A (en) * 2013-06-12 2014-12-17 Blagdon Actuation Res Ltd Servo Valves

Similar Documents

Publication Publication Date Title
KR100841272B1 (en) Fluid friction clutch
US5842680A (en) Actuator using magnetic forces to reduce frictional forces
CN114718933B (en) Two-dimensional motor direct-drive electro-hydraulic servo valve with adjustable zero position
KR101073046B1 (en) Actuator for viscous clutch with magnetic oil circulation valve actuation in the clutch shaft
US6332451B1 (en) Rotary valve actuator arrangement
JPH06241207A (en) Linear servo valve
JPH0755043A (en) Electromagnetically operable pressure control valve
JP2003343746A (en) Rotary valve
DE19958936C1 (en) Automobile braking system with motor/ pump unit has sealing element for separation of electrodynamic and hydraulic regions of motor/pump unit
JPH0133714B2 (en)
JPH0565749B2 (en)
JPS6240593B2 (en)
JPH078674U (en) Waterproof structure of rotary valve
JP2531194Y2 (en) Solenoid device
JP4736256B2 (en) Shifting operation device
JP2815726B2 (en) Hydraulic power transmission coupling
JPS61175302A (en) Force motor-type servo valve
JPS61109982A (en) Electrically powered valve
JPH0360355A (en) Motor
JP2605864B2 (en) Flow control valve
JPH0710133Y2 (en) Spool valve
JP2000508413A (en) Seat valve
JPH02286814A (en) Valve driving device
JPH06105524A (en) Motor
JPH04231704A (en) Servovalve of direct action type