JP3134725B2 - Electromagnetic solenoid - Google Patents
Electromagnetic solenoidInfo
- Publication number
- JP3134725B2 JP3134725B2 JP07222947A JP22294795A JP3134725B2 JP 3134725 B2 JP3134725 B2 JP 3134725B2 JP 07222947 A JP07222947 A JP 07222947A JP 22294795 A JP22294795 A JP 22294795A JP 3134725 B2 JP3134725 B2 JP 3134725B2
- Authority
- JP
- Japan
- Prior art keywords
- mover
- iron core
- fixed iron
- fixed
- electromagnetic solenoid
- 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.)
- Expired - Fee Related
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、動作時の可動子の
バウンスを低減させられる電磁ソレノイドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic solenoid capable of reducing the bounce of a mover during operation.
【０００２】[0002]
【従来の技術】電磁ソレノイドにより、例えばバルブの
開口を操作をするような場合、可動子のバウンスは自動
切換バルブの機構部分の寿命性能に悪影響を及ぼす。ま
た、近年、電磁ソレノイドを組み込んだ機器への騒音低
減に対する要求が厳しくなり、その対策がとられてい
る。電磁ソレノイドの騒音の低減は、例えば、可動子を
吸着するための励磁電流を定められた使用条件の範囲で
低くして使用して、吸着時の衝撃を緩和することにより
ある程度可能である。また、電磁ソレノイド自体におい
ても、ゴムなどの弾性体を吸着面の一部に挿入すること
が行われている。前者においては、励磁電流を低くした
ことにより保持力も低下し、可動子の吸着されるときの
バウンスも相対的に大きくなる。また後者においては、
吸着の状態にて、弾性体の厚み分の空隙が磁気回路に生
じることにより保持力が低下してバウンスが大きいもの
となり、さらに保持時間の長い用途において、励磁電流
を下げて保持を継続できないといったことも起こりう
る。2. Description of the Related Art In the case of operating an opening of a valve by an electromagnetic solenoid, for example, the bounce of the mover adversely affects the service life of the mechanical portion of the automatic switching valve. In recent years, demands for noise reduction for devices incorporating an electromagnetic solenoid have become strict, and measures have been taken to reduce the noise. The noise of the electromagnetic solenoid can be reduced to some extent by, for example, reducing the impact at the time of attracting by using the exciting current for attracting the mover at a low level within a predetermined use condition. Also, in the electromagnetic solenoid itself, an elastic body such as rubber is inserted into a part of the suction surface. In the former, the holding force is also reduced by lowering the exciting current, and the bounce when the movable element is attracted is relatively large. In the latter,
In the state of adsorption, a gap corresponding to the thickness of the elastic body is generated in the magnetic circuit, so that the holding force is reduced and the bounce becomes large, and in applications where the holding time is long, the excitation current is lowered and the holding cannot be continued. Things can happen.
【０００３】かかる問題に対処する電磁ソレノイドとし
て、特開平６−１９６３１７に開示されるものがあり、
その断面図を図５に示す。このものは、バウンスの低減
と、騒音の低減及びその実現に際しての保持力の低下を
防ぐため、補助固定鉄心と２つの弾性体を付加したもの
である。図において、左側はこのものの励磁前の状態を
示し、右側は励磁後の保持状態を示している。[0003] As an electromagnetic solenoid to cope with such a problem, there is one disclosed in Japanese Patent Laid-Open No. 6-196317.
FIG. 5 shows a cross-sectional view thereof. In this device, an auxiliary fixed iron core and two elastic bodies are added in order to reduce bounce, reduce noise and prevent a reduction in holding force in realizing the reduction. In the figure, the left side shows the state before excitation, and the right side shows the holding state after excitation.
【０００４】この電磁ソレノイド２０は、ボビン２２に
軟銅線を巻回してなる電磁コイル２１、電磁コイル２１
に流れる励磁電流により磁化制御される継鉄２３及び固
定鉄心２４、磁化制御される固定鉄心２４より磁気的引
力を受けてその同軸上を移動しうるよう配設される可動
子２５等を有する。継鉄２３はケーシングを兼ね、固定
鉄心２４は継鉄２３の中央に固着されている。２７は第
一の弾性体で、固定鉄心２４と継鉄２３との対向部に、
固定鉄心２４に固着されて配設されている。２６は、可
動子２５を吸着して保持するための補助固定鉄心で、励
磁前は、第二の弾性体２８により、一体に設けられたフ
ランジ部２６ａを押圧されて配設されている。また、図
示はしていないが、固定鉄心２４と可動子２５との間の
磁気的引力に対抗するようにばね力が作用するスプリン
グが適宜配されている。この可動子２５は、その上方の
継鉄２３より一定量突出した端部には、図には示されて
いないが、例えば自動切換バルブの弁体部分の部品と連
結固定されて、直線方向に駆動されることにより、バル
ブの開閉などを行う。The electromagnetic solenoid 20 includes an electromagnetic coil 21 formed by winding a soft copper wire around a bobbin 22,
And a movable iron 25 arranged so as to be movable coaxially by receiving magnetic attraction from the fixed iron core 24 whose magnetization is controlled by the excitation current flowing through the core. The yoke 23 also serves as a casing, and the fixed iron core 24 is fixed to the center of the yoke 23. Reference numeral 27 denotes a first elastic body, which is provided at an opposing portion between the fixed iron core 24 and the yoke 23.
It is fixed to the fixed iron core 24 and disposed. Reference numeral 26 denotes an auxiliary fixed iron core for adsorbing and holding the mover 25. Before excitation, the flange portion 26a provided integrally is pressed by a second elastic body 28 and disposed. Further, although not shown, a spring that acts on a spring force to oppose a magnetic attraction between the fixed iron core 24 and the mover 25 is appropriately disposed. Although not shown in the figure, the mover 25 is fixedly connected to a part of a valve body part of an automatic switching valve, for example, in an end portion projecting from the upper part of the yoke 23 above the yoke 23 in a linear direction. When driven, the valve opens and closes.
【０００５】この電磁ソレノイド２０は、電磁コイル２
１に励磁電流を流すと、可動子２５−空隙−固定鉄心２
４−継鉄２３−可動子２５という経路に磁束が発生し、
可動子２５に磁気的引力が作用する。その結果、可動子
２５は、この磁気的引力により、前述のスプリングのば
ね力に打ち勝って最終到達位置に向かって移動する。そ
して可動子２５の先端が弾性体２７に衝突するのと同時
に、その周縁に設けた平面（ｂ面）にて補助固定鉄心２
６に吸着され、弾性体２７、２８のばね力が平衡して保
持状態となる。以上のようにこの電磁ソレノイド２０
は、騒音の低減を実現し、さらに可動子２５は、最終到
達位置において補助固定鉄心２６にて面吸着されて、安
定して保持力を得るものとなる。[0005] The electromagnetic solenoid 20 comprises an electromagnetic coil 2
When an exciting current is applied to 1, mover 25-air gap-fixed iron core 2
A magnetic flux is generated in a path of 4-yoke 23-mover 25,
Magnetic attraction acts on the mover 25. As a result, the mover 25 moves toward the final position by overcoming the spring force of the spring by the magnetic attraction. At the same time that the tip of the mover 25 collides with the elastic body 27, the auxiliary fixed iron core 2 is placed on a plane (b-plane) provided on the periphery thereof.
6 and the springs of the elastic bodies 27 and 28 are balanced to be in a holding state. As described above, this electromagnetic solenoid 20
Realizes a reduction in noise, and furthermore, the mover 25 is surface-adsorbed by the auxiliary fixed iron core 26 at the final arrival position, so that a stable holding force is obtained.
【０００６】[0006]
【発明が解決しようとする課題】上述の電磁ソレノイド
２０は、補助固定鉄心２６の吸着によりバウンスが低減
でき、弾性体２７、２８のばね力の効果により騒音の低
減も同時に実現される。しかしながら、この弾性体２７
は、可動子２５より移動に際しての直接的な衝撃を受け
るのに対し、弾性体２８は、補助固定鉄心２６が弾性体
２８のばね力に反発して最終到達位置に移動し、可動子
２５に面吸着され移動停止するに際しての間接的な衝撃
を受けるのみである。その結果、弾性体２７、２８は、
及ぼされる衝撃力の差により、長期間の使用において、
両者のばね力の劣化に差が生ずることとなる。また、熱
的に厳しい環境条件にて使用された場合には、短期間の
使用においても、衝撃力と熱的な作用の相乗効果により
弾性体２７のばね力の劣化が進むことがある。そして可
動子２５は、補助固定鉄心２６に直接に吸着されたのち
弾性体２８ばね力を受けながら最終到達位置へ到達する
こととなり、衝撃音が大きくなる。すなわち、長期間の
使用かあるいは環境条件による熱的な作用により、２つ
弾性体のばね力の設定の関係が変化し、騒音の低減効果
が小さくなるという問題点があった。In the electromagnetic solenoid 20, the bounce can be reduced by the suction of the auxiliary fixed iron core 26, and the noise can be reduced at the same time by the effect of the spring force of the elastic members 27 and 28. However, this elastic body 27
Receives a direct impact during movement from the mover 25, whereas the elastic body 28 moves to the final position where the auxiliary fixed iron core 26 repels the spring force of the elastic body 28, and It is only subjected to an indirect impact when the surface is sucked and stopped. As a result, the elastic bodies 27 and 28
Due to the difference in impact force exerted, in long-term use,
There will be a difference in the deterioration of both spring forces. Also, when used under severe thermal conditions, the spring force of the elastic body 27 may be degraded due to the synergistic effect of the impact force and the thermal action even in a short-term use. Then, the mover 25 reaches the final position while receiving the spring force of the elastic body 28 after being directly attracted to the auxiliary fixed iron core 26, and the impact noise increases. That is, there is a problem that the relationship between the setting of the spring force of the two elastic members changes due to a long-term use or a thermal action due to environmental conditions, and the effect of reducing noise is reduced.
【０００７】本発明は、上記事由に鑑みてなしたもの
で、その目的とするところは、衝撃音の変化を少なくす
るとともに可動子の吸着時のバウンスを低減できる電磁
ソレノイドを提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic solenoid which can reduce a change in an impact sound and a bounce at the time of attracting a movable element. .
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の電磁ソレノイドにおいては、電磁コ
イルと、電磁コイルに流れる励磁電流により磁化制御さ
れる継鉄及び固定鉄心と、磁化制御される固定鉄心と対
向し固定鉄心より磁気的引力を受けてその同軸上を移動
し得るよう配設される可動子と、固定鉄心と可動子との
間の磁気的引力に対抗するスプリングを具備する電磁ソ
レノイドにおいて、前記可動子が固定鉄心に吸引されて
最終到達位置に移動したとき、一端が可動子により押圧
されて他端が可動子の側面に吸着する磁性材料製の吸着
部材を固定鉄心に設けた構成としている。これにより、
可動子は固定鉄心に設けた吸着部材に吸着されて保持さ
れる。In order to achieve the above object, an electromagnetic solenoid according to the present invention is characterized in that an electromagnetic coil, a yoke and a fixed iron core whose magnetization is controlled by an exciting current flowing through the electromagnetic coil, A mover that is opposed to the fixed iron core to be controlled and is arranged to receive magnetic attraction from the fixed iron core and move on the same axis, and a spring that opposes magnetic attraction between the fixed iron core and the mover. In the electromagnetic solenoid provided, when the mover is attracted to the fixed iron core and moves to the final arrival position, one end is pressed by the mover and the other end is fixed to a magnetic material adsorption member that is adsorbed to the side surface of the mover. The structure is provided on the iron core. This allows
The mover is adsorbed and held by an adsorbing member provided on the fixed iron core.
【０００９】また、請求項２記載の電磁ソレノイドにお
いては、請求項１記載の吸着部材に、可動子の最終到達
位置にて励磁電流が無くなったとき可動子の側面への吸
着から他端を開放させるよう弾性体を配設した構成とし
ている。これにより、励磁による吸着時の衝撃が緩和さ
れるとともに、電磁コイルを非励磁としたときに可動子
は固定鉄心から直ちに離脱される。Further, in the electromagnetic solenoid according to the second aspect, the other end of the movable member is released from the attracting to the side surface of the movable element when the exciting current is lost at the final arrival position of the movable element. The structure is such that an elastic body is provided so as to allow the elastic body to move. Thereby, the shock at the time of adsorption by excitation is reduced, and the movable element is immediately separated from the fixed iron core when the electromagnetic coil is de-energized.
【００１０】[0010]
【発明の実施の形態】以下、本発明の第１の実施形態を
図１、図２及び図３に基づき説明する。図１は正面断面
図、図２（ａ）は励磁前の状態、図２（ｂ）は励磁後の
状態を示した図１のＡ部の拡大図、図３は図１のＡ部の
斜視図である。この電磁ソレノイド１は、電磁コイル２
と、継鉄３及び固定鉄心４と、軸６を有する可動子５
と、吸着部材７と、スプリング８と、軸を支持する軸受
け９及び１０と、軸の位置を検出するポジションセンサ
１１と、ケーシング１２と、を主要構成部材とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a front sectional view, FIG. 2 (a) is a state before excitation, FIG. 2 (b) is an enlarged view of a part A in FIG. 1 showing a state after excitation, and FIG. 3 is a perspective view of a part A in FIG. FIG. The electromagnetic solenoid 1 includes an electromagnetic coil 2
Armature 5 having yoke 3, fixed iron core 4, and shaft 6
, A suction member 7, a spring 8, bearings 9 and 10 for supporting a shaft, a position sensor 11 for detecting a position of the shaft, and a casing 12 as main components.
【００１１】電磁コイル２は、円筒状の巻胴部２ａと、
その両端に連設した鍔部２ｂを有して合成樹脂にて型造
されてなるボビン２ｃの巻胴部２ａの外周に、表面を絶
縁層にて被覆された軟銅線を巻回して形成される。ボビ
ン２ｃは、後述する継鉄３及び固定鉄心４を、巻胴部２
ａの内側において一定距離を隔てて同軸的に対向配設さ
せる位置決め機能も有する。The electromagnetic coil 2 includes a cylindrical winding drum 2a,
It is formed by winding a soft copper wire whose surface is covered with an insulating layer around the outer periphery of a bobbin 2a of a bobbin 2c formed of a synthetic resin having a flange portion 2b provided at both ends thereof. You. The bobbin 2c includes a yoke 3 and a fixed iron core 4 described later,
It also has a positioning function of being coaxially opposed to each other at a fixed distance inside a.
【００１２】継鉄３は、磁性金属材料により、ボビン２
ｃの巻胴部２ａの内径に略等しい外径の円筒部３ａと、
ボビン２ｃの鍔部２ｂの外径と略等しい外径の鍔部３ｂ
とを有する形状に、切削加工等により一体に形成され
る。円筒部３ａは、ボビン２ｃの巻胴部２ａの略半分の
長さを有し、その内方には後述する可動子５を同軸上に
遊嵌する。この継鉄３は、円筒部３ａをボビン２ｃの巻
胴部２ａの一端側より挿入し、鍔部３ｂにて位置決めさ
れて配設される。The yoke 3 is made of a magnetic metal material,
c, a cylindrical portion 3a having an outer diameter substantially equal to the inner diameter of the winding drum portion 2a;
A flange 3b having an outer diameter substantially equal to the outer diameter of the flange 2b of the bobbin 2c
And are integrally formed by cutting or the like. The cylindrical portion 3a has a length that is approximately half the length of the winding drum portion 2a of the bobbin 2c, and a movable element 5, which will be described later, is coaxially loosely fitted inside the cylindrical portion 3a. The yoke 3 is inserted by inserting the cylindrical portion 3a from one end side of the bobbin portion 2a of the bobbin 2c, and is positioned and arranged by the flange portion 3b.
【００１３】固定鉄心４は、磁性金属材料により、ボビ
ン２ｃの巻胴部２ａの内径に略等しい外径の円筒部４ａ
と、ボビン２ｃの鍔部２ｂの外径と略等しい外径の鍔部
４ｂとを有する形状に、切削加工等により一体に形成さ
れる。円筒部４ａは、後述する可動子５の対向部５ｂに
対向する凹状の対向部４ｃと、後述する軸６及びスプリ
ング７を挿通する軸穴が形成された円筒状の突起部４ｄ
とを有し、側方に後述する吸着部材８を軸着する軸着穴
４ｅを形成する。対向部４ｃは、後述する吸着部材７を
設け、吸着部材７を可動子５の最終到達位置において側
面に吸着させるとき、回動変位させるためのギャップを
対向部５ｂと形成する。このギャップは、対向部５ｂと
の関係において、軸方向と直交方向における各対向部間
の距離を、可動子５が固定鉄心４に最も近接したとき、
可動子５の先端にいくに従い小さくなるように形成す
る。軸着穴４ｅは、突起部４ｄを介してその両側に平行
に、対向部４ｃを貫通して設けられるが、対向部４ｃの
底面が鍔部４ｂより深い場合には、適宜鍔部４ｂの一部
に段差面を形成して設けるものとする。この固定鉄心４
は、円筒部４ａをボビン２ｃの巻胴部２ａの継鉄３を配
設した他端側より挿入し、鍔部４ｂにて位置決めされて
継鉄３の円筒部３ａと一定距離を隔てて対向配設され
る。The fixed iron core 4 is made of a magnetic metal material and has a cylindrical portion 4a having an outer diameter substantially equal to the inner diameter of the bobbin 2a of the bobbin 2c.
And a flange 4b having an outer diameter substantially equal to the outer diameter of the flange 2b of the bobbin 2c. The cylindrical portion 4a has a concave facing portion 4c facing a facing portion 5b of the mover 5 described later, and a cylindrical projecting portion 4d having a shaft hole through which a shaft 6 and a spring 7 described later are inserted.
And a shaft mounting hole 4e for mounting a suction member 8 described later on the side. The opposing portion 4c is provided with a suction member 7 to be described later, and forms a gap with the opposing portion 5b for rotationally displacing when the suction member 7 is adsorbed to the side surface at the final arrival position of the movable element 5. This gap is determined by the distance between the opposing portions in the axial direction and the orthogonal direction in relation to the opposing portion 5 b when the mover 5 is closest to the fixed iron core 4.
The movable member 5 is formed so as to become smaller as it approaches the tip. The shaft mounting hole 4e is provided through the opposing portion 4c in parallel with both sides thereof via the protruding portion 4d, but when the bottom surface of the opposing portion 4c is deeper than the flange portion 4b, one end of the flange portion 4b is appropriately formed. It is assumed that a step surface is formed and provided in the portion. This fixed iron core 4
Is inserted into the bobbin 2c of the bobbin 2c from the other end of the bobbin 2a where the yoke 3 is provided, and is positioned at the flange 4b and faces the cylindrical portion 3a of the yoke 3 at a certain distance. Will be arranged.
【００１４】可動子５は、磁性金属材料により、中心に
肉逃がしの穴を設けた円柱部５ａと、固定鉄心４の対向
部４ｃと対向する対向部５ｂを有して形成される。さら
に詳しくは、円筒部５ａは、その外径を継鉄３の円筒部
３ａの内径より僅かに小さい寸法とし、中心の肉逃がし
穴寸法は適宜とし、後述する軸６を固着する固着穴を中
心に有する。対向部５ｂは、円柱部５ａと連なる円錐台
状とし、中心に固定鉄心４の突起部４ｄに対応する肉逃
がし穴及び後述するスプリング８を挿入して係止する穴
を有する。この可動子５は、軸６を固着穴に貫通して所
定の位置に固着し、後述する第１軸受け９及び第２軸受
け１０にて軸６の両端が往復動自在に支持されて、継鉄
３の円筒部３ａの内側の同軸上に配設される。The mover 5 is made of a magnetic metal material and has a columnar portion 5a having a hole for relief at the center and an opposing portion 5b opposing the opposing portion 4c of the fixed iron core 4. More specifically, the outer diameter of the cylindrical portion 5a is slightly smaller than the inner diameter of the cylindrical portion 3a of the yoke 3, and the size of the central hole is appropriately set. To have. The opposing portion 5b has a truncated conical shape connected to the cylindrical portion 5a, and has, at the center thereof, a relief hole corresponding to the projection 4d of the fixed iron core 4, and a hole for inserting and locking a spring 8 described later. The mover 5 has the shaft 6 penetrated through the fixing hole and fixed at a predetermined position, and both ends of the shaft 6 are supported by first and second bearings 9 and 10 to be described later so as to be reciprocally movable. 3 is disposed coaxially inside the cylindrical portion 3a.
【００１５】軸６は、黄銅等の非磁性金属材料により、
可動子５の固着穴と略等しい外径寸法でもって可動子５
より十分長い長さを有して形成され、可動子５に所定位
置に位置するよう固着される。なお、電磁ソレノイド１
から下方に突出する軸６の他端には、図には示されてい
ないが、例えばバルブの開口の調節部材と連結固定され
て、矢印６ａに示す直線方向に駆動されることにより、
バルブの開口制御などを行う。The shaft 6 is made of a non-magnetic metal material such as brass.
The movable element 5 has an outer diameter substantially equal to the fixing hole of the movable element 5.
It is formed to have a longer length and is fixed to the mover 5 so as to be located at a predetermined position. In addition, the electromagnetic solenoid 1
At the other end of the shaft 6 projecting downward from, although not shown in the figure, for example, it is connected and fixed to an adjusting member for opening the valve, and is driven in a linear direction indicated by an arrow 6a.
Controls the opening of the valve.
【００１６】吸着部材７は、例えば鉄等の磁性材料によ
り、可動子５の先端面に当接し押圧されて吸着部材７を
僅かに回動させる一端である押圧部７ａと、回動により
可動子５の側面に当接し吸着される他端である吸着部７
ｂとを有して形成される。また、可動子５と、対向部５
ｂの円錐台状のテーパ面と先端面とに面して、その形成
される角度を同一とする内面と、固定鉄心４と、対向部
４ｃの凹状のテーパ面と底面とに面して、その形成され
る角度が僅かに小さい外面とを有する。押圧部７ａと吸
着部７ｂの交差部分の側方には、固定鉄心４に軸着され
るための軸穴７ｃを有する。この吸着部材７は、吸着部
７ｂを固定鉄心４の対向部４ｃのテーパ面に当接し、押
圧部７ａの端部にて対向部４ｃの底面間に空隙を形成し
て、固定鉄心４に軸着されて配設される。そして、可動
子５が固定鉄心４に吸引されて最終到達位置に移動した
とき、押圧部７ａが可動子５により押圧されて吸着部７
ｂが可動子の側面に吸着する。The adsorbing member 7 is made of a magnetic material such as iron, for example, and is pressed against the distal end surface of the mover 5 to press the adsorbing member 7 slightly. Suction part 7 which is the other end which abuts on the side surface of and is sucked
b. Further, the mover 5 and the opposing portion 5
b, facing the frusto-conical tapered surface and the distal end surface, facing the inner surface having the same angle formed, the fixed iron core 4, and the concave tapered surface and the bottom surface of the facing portion 4c. The outer surface has a slightly smaller angle. At the side of the intersection of the pressing portion 7a and the suction portion 7b, there is provided a shaft hole 7c for being mounted on the fixed iron core 4. The suction member 7 contacts the suction portion 7b with the tapered surface of the facing portion 4c of the fixed core 4 and forms a gap between the bottom surfaces of the facing portion 4c at the end of the pressing portion 7a. It is worn and arranged. When the movable element 5 is attracted by the fixed iron core 4 and moves to the final position, the pressing portion 7a is pressed by the movable element 5 and
b is attracted to the side surface of the mover.
【００１７】スプリング８は、ステンレス等により形成
されたコイルスプリングであり、一端を可動子５、他端
を後述する第１軸受け９にそれぞれ当接させて軸６に遊
嵌され、前述の固定鉄心４の円筒部４ｄに形成された軸
穴に遊挿される。The spring 8 is a coil spring made of stainless steel or the like. One end of the spring 8 is in contact with the movable element 5 and the other end thereof is in contact with a first bearing 9 which will be described later. 4 is loosely inserted into a shaft hole formed in the cylindrical portion 4d.
【００１８】第１軸受９は、合成樹脂により型造され、
固定鉄心４の鍔部４ｂと略同一の外径寸法を有する円盤
形状をなし、中心部に軸６を往復動自在に支持する軸穴
を有する。The first bearing 9 is formed of a synthetic resin,
It has a disk shape having substantially the same outer diameter as the flange portion 4b of the fixed iron core 4, and has a shaft hole at the center thereof for supporting the shaft 6 reciprocally.
【００１９】第２軸受１０は、合成樹脂により型造さ
れ、継鉄３の円筒部３ａの内径より僅かに大きい外径寸
法を有する円盤形状をなし、中心部に軸６を往復動自在
に支持する軸穴を有する。この第２軸受け１０は、外径
寸法を継鉄３の円筒部３ａの内側に圧入固着できる程度
に設定し、平面１０ａが継鉄３の鍔部３ｂの表面と略同
一平面となるよう圧入固着され、内方側端面にて、スプ
リング８により押圧された可動子５の位置決めを行う。The second bearing 10 is formed of a synthetic resin, has a disk shape having an outer diameter slightly larger than the inner diameter of the cylindrical portion 3a of the yoke 3, and supports the shaft 6 at the center thereof in a reciprocating manner. It has a shaft hole. The outer diameter of the second bearing 10 is set to such an extent that it can be press-fitted and fixed inside the cylindrical portion 3a of the yoke 3, and the press-fitting so that the plane 10a is substantially flush with the surface of the flange 3b of the yoke 3. Then, the movable element 5 pressed by the spring 8 is positioned on the inner end face.
【００２０】ポジションセンサ１１は、軸６の一端に接
し、軸６の直線方向の位置変位に対応して電気信号を出
力し、図示されない外部回路により、軸６の位置をフィ
ードバック制御するのに供される。このポジションセン
サ１１は、例えば摺動型の可変抵抗器により、軸６の変
位を電気抵抗の変化として検出するものが用いられ、電
磁ソレノイド１に固着される鍔部を有したセンサ取付台
１１ａにて取着される。The position sensor 11 is in contact with one end of the shaft 6 and outputs an electric signal corresponding to the displacement of the shaft 6 in the linear direction, and is used for feedback control of the position of the shaft 6 by an external circuit (not shown). Is done. The position sensor 11 is, for example, a sensor that detects displacement of the shaft 6 as a change in electric resistance by a sliding type variable resistor, and is mounted on a sensor mounting base 11 a having a flange fixed to the electromagnetic solenoid 1. Attached.
【００２１】ケーシング１２は、磁性金属材料により、
継鉄３の鍔部３ｂ及び固定鉄心４の鍔部４ｂの外径より
僅かに大きい内径の中空円筒部１２ａと、一端側に第１
軸受け９の周縁部を載置する円環部１２ｂを有して形成
される。中空円筒部１２ａは、その長さを、第１軸受け
９、固定鉄心４、電磁コイル２、継鉄３及びセンサ取付
台１１ａを積層した寸法よりやや大きい寸法として、そ
の先端部は、全体を内包固着するための固着部１２ｃと
なる。また、ケーシング１２は、電磁コイル２に励磁電
流が流れることにより、継鉄３と、可動子５と、固定鉄
心４とともに磁路が形成される。The casing 12 is made of a magnetic metal material.
A hollow cylindrical portion 12a having an inner diameter slightly larger than the outer diameter of the flange portion 3b of the yoke 3 and the flange portion 4b of the fixed core 4;
The bearing 9 has an annular portion 12b on which the peripheral portion is placed. The length of the hollow cylindrical portion 12a is slightly larger than the size of the first bearing 9, the fixed iron core 4, the electromagnetic coil 2, the yoke 3, and the sensor mount 11a stacked on each other. It becomes a fixing portion 12c for fixing. Further, in the casing 12, a magnetic path is formed together with the yoke 3, the mover 5, and the fixed iron core 4 by exciting current flowing through the electromagnetic coil 2.
【００２２】電磁ソレノイド１は、以上の部材で構成さ
れ、その組み立てはケーシング１１に、まず、第１軸受
け８、固定鉄心４、電磁コイル２、継鉄３の順に挿入
し、次いで、スプリング８と、軸６を所定の位置に固着
した可動子５を挿入し、次いで、第２軸受け１０を継鉄
３へ圧入固着した後ポジションセンサ１１を挿入する。
そして、センサ取付台１１ａから突出しているケーシン
グ１２の縁端部を、所定の押圧力で、センサ取付台１１
ａの端部外方を押圧するように加圧変形する。The electromagnetic solenoid 1 is composed of the above-described members, and is assembled into a casing 11 by first inserting the first bearing 8, the fixed iron core 4, the electromagnetic coil 2, and the yoke 3 in this order. Then, the mover 5 having the shaft 6 fixed at a predetermined position is inserted, and then the second bearing 10 is press-fitted and fixed to the yoke 3, and then the position sensor 11 is inserted.
Then, the edge of the casing 12 protruding from the sensor mount 11a is pressed with a predetermined pressing force.
a is deformed by pressing so as to press the outside of the end portion of FIG.
【００２３】上記のように構成される電磁ソレノイド１
において、電磁コイル２の励磁電流が零の場合、可動子
５は、軸６に遊嵌されたスプリング８のばね力により、
図１に示す第１位置（固定鉄心４より最も離れた位置）
にある。電磁コイル２に励磁電流が流れることにより、
継鉄３と、可動子５と、略平行のギャップを設けて配設
された固定鉄心４と、ケーシング１２とにより磁路が形
成され、前記ギャップにおいて、可動子５に対し固定鉄
心４の側に向かう磁気的引力が働く。可動子５及び軸６
は、この磁気的引力により直ちに矢印６ａに示す方向に
移動しはじめ、さらにスプリング８のばね力に打ち勝っ
て、図２（ｂ）に示す第２位置（固定鉄心４に最も近い
位置即ち最終到達位置）に向かって移動する。そして可
動子５は、対向部５ｂの先端面が、吸着部材７の押圧部
７ａを、固定鉄心４の対向部４ｃの底面に向けて押圧
し、その側面である円錐台状のテーパ面が吸着部７ｂに
吸着されて固定鉄心４に保持される。この保持状態にお
いては、励磁電流による磁路は、継鉄３−可動子５−吸
着部材７−固定鉄心４−ケーシング１２−継鉄３とな
る。そして吸着部材７は、可動子５と当接する内面の角
度が可動子５の対向部５ｂの円錐台状のテーパ面と先端
面にて形成される角度と同一で、且つ軸方向の磁気的引
力により吸着部材７の押圧部７ａが押圧されるので、吸
着面７ｂにおいて、より大きな保持力が得られて確実に
吸着され保持されるものとなる。従って、励磁電流を低
くしても吸着時のバウンスは無くなり、さらに保持状態
に移行した後、励磁電流を下げた状態にて保持を継続で
きるので、低騒音により、低電流にて駆動制御ができ
る。The electromagnetic solenoid 1 constructed as described above
, When the exciting current of the electromagnetic coil 2 is zero, the mover 5 is moved by the spring force of the spring 8 loosely fitted on the shaft 6.
1st position shown in FIG. 1 (position farthest from fixed iron core 4)
It is in. When the exciting current flows through the electromagnetic coil 2,
A magnetic path is formed by the yoke 3, the mover 5, the fixed core 4 provided with a substantially parallel gap, and the casing 12, and a magnetic path is formed in the gap with respect to the mover 5 with respect to the fixed core 4. A magnetic attraction is applied toward. Mover 5 and shaft 6
Starts moving immediately in the direction shown by the arrow 6a due to the magnetic attraction, and further overcomes the spring force of the spring 8 to move to the second position (the position closest to the fixed iron core 4, that is, the final arrival position) shown in FIG. ). In the mover 5, the distal end surface of the opposing portion 5 b presses the pressing portion 7 a of the adsorbing member 7 toward the bottom surface of the opposing portion 4 c of the fixed iron core 4, and the frustoconical tapered surface, which is the side surface thereof, adsorbs. It is adsorbed by the portion 7 b and held by the fixed iron core 4. In this holding state, the magnetic path by the exciting current is the yoke 3-mover 5-adsorbing member 7-fixed iron core 4-casing 12-yoke 3. The angle of the inner surface of the attraction member 7 that contacts the mover 5 is the same as the angle formed by the frustoconical tapered surface and the distal end surface of the opposing portion 5b of the mover 5, and the magnetic attraction in the axial direction. As a result, the pressing portion 7a of the suction member 7 is pressed, so that a larger holding force is obtained on the suction surface 7b, and the suction portion 7a is reliably sucked and held. Therefore, even if the excitation current is reduced, the bounce at the time of adsorption is eliminated, and furthermore, after the transition to the holding state, the holding can be continued with the excitation current lowered, so that the drive control can be performed at a low current with low noise. .
【００２４】次に、本発明の第２の実施形態を図４に基
づいて説明する。このものは、第１の実施形態に、励磁
電流が無くなったとき、吸着部材７の可動子５への吸着
を開放させる弾性体１３を付加して配設したものであ
る。この弾性体１３は、例えばゴム等により、円筒形状
を有して、固定鉄心４の対向部４ｃの凹状の底面に設け
た円形の孔４ｆに圧入して固着される。そしてその一面
は、固定鉄心４の当接する第１軸受け９に当接して位置
決めされ、他面は、固定鉄心４の対向部４ｃの凹状の底
面より適宜突出させて配設される。この突出した他面
は、弾性体１３のばね力により、当接する吸着部材７の
押圧部７ａを、可動子５の対向部５ｂの円錐台状の先端
面側に向けて押し上げるものとする。Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is different from the first embodiment in that an elastic body 13 is added to release the attraction of the attraction member 7 to the movable element 5 when the excitation current is lost. The elastic body 13 has a cylindrical shape, for example, made of rubber or the like, and is pressed into and fixed to a circular hole 4f provided on a concave bottom surface of the facing portion 4c of the fixed iron core 4. One surface thereof is positioned in contact with the first bearing 9 in contact with the fixed iron core 4, and the other surface is disposed so as to protrude appropriately from the concave bottom surface of the facing portion 4 c of the fixed iron core 4. The other surface that is protruded pushes the pressing portion 7a of the adsorbing member 7 in contact with the elastic member 13 toward the truncated cone-shaped tip surface of the opposing portion 5b of the mover 5.
【００２５】このものは、前述の可動子５の第１位置か
ら第２位置への移動において、可動子５は、弾性体１３
のばね力により、対向部５ｂの先端面が吸着部材７の押
圧部７ａを、固定鉄心４の対向部４ｃの底面に向けて徐
々に押圧し、その側面である円錐台状のテーパ面が吸着
部７ｂに吸着されて固定鉄心４に保持されるものとな
る。また、励磁電流が無くなったときは、弾性体１３の
無い場合には磁性金属材料の残留磁気の影響により、可
動子５と吸着部材７の吸着部７ｂとの吸着は、僅かに遅
れて開放されるが、弾性体１３のばね力により、可動子
５と吸着部材７の吸着部７ｂとの吸着は直ちに開放され
るものとなる。その結果、可動子５が固定鉄心４に吸着
されるときの騒音が低減し、可動子５の開放動作の応答
性も向上する。また、１カ所に設けた弾性体１３のばね
力により騒音の低減をするものであり、ばね力の劣化に
対しての特性の調節は容易にできる。This is because, when the movable element 5 is moved from the first position to the second position, the movable element 5
, The distal end surface of the opposing portion 5b gradually presses the pressing portion 7a of the adsorbing member 7 toward the bottom surface of the opposing portion 4c of the fixed iron core 4, and the frustoconical tapered surface, which is the side surface thereof, adsorbs. It is adsorbed by the portion 7b and held by the fixed iron core 4. Further, when the excitation current is lost, the attraction between the movable element 5 and the attraction portion 7b of the attraction member 7 is released with a slight delay due to the influence of the residual magnetism of the magnetic metal material without the elastic body 13. However, the attraction between the mover 5 and the attraction portion 7b of the attraction member 7 is immediately released by the spring force of the elastic body 13. As a result, noise when the mover 5 is attracted to the fixed iron core 4 is reduced, and the responsiveness of the opening operation of the mover 5 is also improved. In addition, noise is reduced by the spring force of the elastic body 13 provided at one place, and characteristics can be easily adjusted with respect to deterioration of the spring force.
【００２６】なお、第２の実施形態において、弾性体１
３を、各吸着部材の押圧される一端側に設けたが、その
設け方あるいは設ける位置等については何ら制約される
ものではない。また、その形状を円筒形状として圧入固
着される孔を円形としたが、その形状も何ら制限される
ものではない。In the second embodiment, the elastic member 1
Although 3 is provided on one end side of each suction member to be pressed, there is no restriction on how to provide it or on where it is provided. In addition, the shape of the hole to be press-fitted and fixed is cylindrical, but the shape is not limited at all.
【００２７】[0027]
【発明の効果】請求項１記載の電磁ソレノイドは、可動
子が固定鉄心に設けた吸着部材に吸着されて保持される
ので、動作時のバウンスが低減できる。According to the electromagnetic solenoid of the present invention, the movable element is attracted and held by the attracting member provided on the fixed iron core, so that the bounce during operation can be reduced.
【００２８】また、請求項２記載の電磁ソレノイドは、
請求項１記載の効果に加え、励磁による吸着時の衝撃が
緩和されるとともに、電磁コイルを非励磁としたときに
可動子は固定鉄心から直ちに離脱されるので、騒音は低
減し可動子の開放動作の応答性が向上する。Further, the electromagnetic solenoid according to claim 2 is
In addition to the effects of claim 1, the shock at the time of adsorption by excitation is reduced, and the mover is immediately separated from the fixed iron core when the electromagnetic coil is de-energized, so that noise is reduced and the mover is opened. The responsiveness of the operation is improved.
【図１】本発明の第１の実施形態の正面断面図である。FIG. 1 is a front sectional view of a first embodiment of the present invention.
【図２】その要部である対向部の励磁前と励磁後の部分
拡大図である。FIG. 2 is a partially enlarged view of an opposing portion, which is a main portion thereof, before and after excitation.
【図３】対向部の斜視図である。FIG. 3 is a perspective view of an opposing portion.
【図４】本発明の第２の実施形態の要部である対向部の
励磁前と励磁後の部分拡大図である。FIG. 4 is a partially enlarged view of a facing portion, which is a main part of a second embodiment of the present invention, before and after excitation.
【図５】従来例の正面断面図である。FIG. 5 is a front sectional view of a conventional example.
２ 電磁コイル ３ 継鉄 ４ 固定鉄心 ５ 可動子 ６ 軸 ７ 吸着部材 ８ スプリング ９ 第１軸受け １０ 第２軸受け １１ ポジションセンサ １２ ケーシング Reference Signs List 2 electromagnetic coil 3 yoke 4 fixed iron core 5 mover 6 shaft 7 suction member 8 spring 9 first bearing 10 second bearing 11 position sensor 12 casing
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 7/16 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) H01F 7/16
Claims (2)
電流により磁化制御される継鉄及び固定鉄心と、磁化制
御される固定鉄心と対向し固定鉄心より磁気的引力を受
けてその同軸上を移動し得るよう配設される可動子と、
固定鉄心と可動子との間の磁気的引力に対抗するスプリ
ングを具備する電磁ソレノイドにおいて、 前記可動子が固定鉄心に吸引されて最終到達位置に移動
したとき、一端が可動子により押圧されて他端が可動子
の側面に吸着する磁性材料製の吸着部材を固定鉄心に設
けたことを特徴とする電磁ソレノイド。1. An electromagnetic coil, a yoke and a fixed core whose magnetization is controlled by an exciting current flowing through the electromagnetic coil, and move on the same axis facing the fixed core whose magnetization is controlled and receiving magnetic attraction from the fixed core. A mover arranged to be able to
In an electromagnetic solenoid having a spring that opposes magnetic attraction between a fixed iron core and a movable element, when the movable element is attracted to the fixed iron core and moves to a final arrival position, one end is pressed by the movable element and the other end is pressed. An electromagnetic solenoid, wherein a fixed member made of a magnetic material is provided on a fixed iron core, the end of which is attracted to a side surface of a mover.
とき可動子の側面への吸着から他端を開放させるよう弾
性体が配設されていることを特徴とする請求項１記載の
電磁ソレノイド。2. The electromagnetic solenoid according to claim 1, wherein said attracting member is provided with an elastic body so as to release the other end from attracting to the side surface of the mover when the exciting current is lost. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07222947A JP3134725B2 (en) | 1995-08-31 | 1995-08-31 | Electromagnetic solenoid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07222947A JP3134725B2 (en) | 1995-08-31 | 1995-08-31 | Electromagnetic solenoid |
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| Publication Number | Publication Date |
|---|---|
| JPH0969433A JPH0969433A (en) | 1997-03-11 |
| JP3134725B2 true JP3134725B2 (en) | 2001-02-13 |
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ID=16790376
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|---|---|---|---|
| JP07222947A Expired - Fee Related JP3134725B2 (en) | 1995-08-31 | 1995-08-31 | Electromagnetic solenoid |
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| JP (1) | JP3134725B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100493420B1 (en) * | 2003-05-30 | 2005-06-07 | 레인보우스케이프주식회사 | A solenoid valve for a fountain |
| JP6447402B2 (en) * | 2015-07-28 | 2019-01-09 | 株式会社デンソー | Linear solenoid |
-
1995
- 1995-08-31 JP JP07222947A patent/JP3134725B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0969433A (en) | 1997-03-11 |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001031 |
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| LAPS | Cancellation because of no payment of annual fees |