JP2014017282A - Electromagnetic actuator - Google Patents

Electromagnetic actuator Download PDF

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Publication number
JP2014017282A
JP2014017282A JP2012151665A JP2012151665A JP2014017282A JP 2014017282 A JP2014017282 A JP 2014017282A JP 2012151665 A JP2012151665 A JP 2012151665A JP 2012151665 A JP2012151665 A JP 2012151665A JP 2014017282 A JP2014017282 A JP 2014017282A
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iron core
fixed iron
coil
seal member
movable
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Inventor
Hiroshi Koiwa
洋 小岩
Shun Shinohe
俊 四戸
Toshiki Ogasawara
俊樹 小笠原
Takeshi Ono
剛資 大野
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Mikuni Corp
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Mikuni Corp
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Priority to JP2012151665A priority Critical patent/JP2014017282A/en
Priority to PCT/JP2013/068090 priority patent/WO2014007230A1/en
Priority to IN10950DEN2014 priority patent/IN2014DN10950A/en
Priority to CN201380035460.1A priority patent/CN104471655A/en
Priority to BR112014033103A priority patent/BR112014033103A2/en
Publication of JP2014017282A publication Critical patent/JP2014017282A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Magnetically Actuated Valves (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic actuator which can be made slim according to the external diameter of coil winding, while ensuring sealability between a fixed core and a coil.SOLUTION: On the outside of the outer periphery of a fixed core 12, the cylindrical part 15a of a movable core 15 is provided movably in the axial direction, and on the outside of the outer periphery of the cylindrical part 15a, a coil 16 is provided. The fixed core 12 has a protrusion 12b protruding from the end of the cylindrical part 15a, and since an annular seal member 18 is provided between the protrusion 12b and the coil 16, a clearance corresponding to the wall thickness of the cylindrical part 15a is provided between the protrusion 12b and the coil 16. When providing the annular seal member in the clearance between the protrusion 12b and the coil 16, an actuator can be made slim according to the external diameter of coil winding, while ensuring sealability between the fixed core 12 and the coil 16.

Description

本発明は、ソレノイドでシャフトを往復動作させて各種の部材を駆動するために用いる電磁アクチュエータに関する。   The present invention relates to an electromagnetic actuator used for driving various members by reciprocating a shaft with a solenoid.

リニアソレノイド等の電磁アクチュエータは、ソレノイドコイルによって形成される磁路に沿って配置された固定鉄心と可動鉄心との間に働く電磁力を吸引力として利用している。
一般的なリニアソレノイドの構造は、可動鉄心の外周外側に固定鉄心を備えた構成となっている（例えば特許文献１および特許文献２参照）。 An electromagnetic actuator such as a linear solenoid uses an electromagnetic force acting between a fixed iron core and a movable iron core arranged along a magnetic path formed by a solenoid coil as an attractive force.
The structure of a general linear solenoid has a configuration in which a fixed iron core is provided on the outer periphery of the movable iron core (see, for example, Patent Document 1 and Patent Document 2).

図４は、従来のリニアソレノイドの一例を示す断面図である。このリニアソレノイドは、軸線方向に所定のギャップを介して対向配置された２つの固定鉄心１，２の内側に、可動鉄心３がその軸方向に沿って移動可能に設けられ、固定鉄心１，２の外側にコイル部５が設けられた構造となっている。   FIG. 4 is a cross-sectional view showing an example of a conventional linear solenoid. This linear solenoid is provided with a movable iron core 3 movably along the axial direction inside two fixed iron cores 1 and 2 that are opposed to each other with a predetermined gap in the axial direction. It has the structure where the coil part 5 was provided in the outer side.

コイル部５は、ボビン５ａとこのボビン５ａに巻き付けられたコイル５ｂとを備えており、コイル部５のボビン５ａと固定鉄心１，２との間に環状のシール部材（Оリング）４ａ，４ｂが設けられている。
第１の固定鉄心１に設けられた鍔状部１ａとボビン５ａの下端のフランジ５ｃとの間にシール部材４ａが設けられ、第２の固定鉄心２の上端部外周面と、ボビン５ａの上端部内周面との間にシール部材４ｂが設けられている。シール部材４ａは平面シールとなっており、シール部材４ｂは径シールとなっている。
なお、図４においては、軸線Оより左側は可動鉄心３が固定鉄心１に吸引されて固定鉄心１側に移動した状態、軸線Оより右側は可動鉄心３が固定鉄心２側に位置している状態を示している。 The coil portion 5 includes a bobbin 5a and a coil 5b wound around the bobbin 5a. An annular seal member (O-ring) 4a, 4b is provided between the bobbin 5a of the coil portion 5 and the fixed iron cores 1 and 2. Is provided.
A seal member 4a is provided between the flange-shaped portion 1a provided on the first fixed iron core 1 and the flange 5c at the lower end of the bobbin 5a, and the outer peripheral surface of the upper end portion of the second fixed iron core 2 and the upper end of the bobbin 5a. A seal member 4b is provided between the inner peripheral surface of the part. The seal member 4a is a flat seal, and the seal member 4b is a diameter seal.
In FIG. 4, the movable iron core 3 is attracted to the fixed iron core 1 and moved to the fixed iron core 1 side on the left side of the axis О, and the movable iron core 3 is located on the fixed iron core 2 side on the right side of the axis О. Indicates the state.

特開２００９−２７５８４１号公報JP 2009-275841 A 特開２００６−１５３２８３号公報JP 2006-153283 A

ところで、大きな吸引力を必要とせず、コイル巻き数が少ない電磁アクチュエータの場合、平面シール側のシール部材（Оリング）４ａの配置スペースが必要となり、コイル巻外径に合わせたスリム化ができないことがある。
すなわちまず、固定鉄心１の鍔状部１ａとボビン５ａのフランジ５ｃとの間をシール部材４ａで確実にシールするためには、所定サイズ（所定の直径および所定の太さ）のシール部材（Оリング）を必要とする。 By the way, in the case of an electromagnetic actuator that does not require a large attractive force and has a small number of coil turns, a space for arranging the seal member (O-ring) 4a on the flat seal side is required, and it is not possible to make it slim according to the coil winding outer diameter There is.
That is, first, in order to securely seal between the flanged portion 1a of the fixed iron core 1 and the flange 5c of the bobbin 5a with the seal member 4a, a seal member (О with a predetermined size (predetermined diameter and predetermined thickness)). Ring).

一方、コイル巻き数が少なくなると、それを巻き付けるボビン５ａの径を小さくすることができる。つまり、図５において、破線で示すように、ボビン５ａの下端のフランジ５ｃの外径を小さくすることができる。
しかし、フランジ５ｃの外径を小さくすると、所定サイズのシール部材４ａの一部がフランジ５ｃからはみ出してシール性を十分に確保できないので、フランジ５ｃの外径、つまりボビン５ａの外径を小さくすることができない。 On the other hand, when the number of coil turns decreases, the diameter of the bobbin 5a around which the coil is wound can be reduced. That is, as shown by a broken line in FIG. 5, the outer diameter of the flange 5c at the lower end of the bobbin 5a can be reduced.
However, when the outer diameter of the flange 5c is reduced, a part of the seal member 4a having a predetermined size protrudes from the flange 5c, so that sufficient sealing performance cannot be ensured. I can't.

このように、コイル巻き数が少なくなっても、ボビン５ａの外径を小さくすることができないため、コイルの巻き数に合わせた径の縮小化、つまりコイル巻外径に合わせたスリム化ができないことがあった。   Thus, since the outer diameter of the bobbin 5a cannot be reduced even if the number of coil turns is reduced, the diameter cannot be reduced in accordance with the number of turns of the coil, that is, cannot be slimmed in accordance with the outer diameter of the coil winding. There was a thing.

本発明は前記事情に鑑みてなされたもので、固定鉄心とコイル部との間のシール性を確保しつつコイル巻外径に合わせたスリム化を行える電磁アクチュエータを提供することを目的としている。   This invention is made | formed in view of the said situation, and it aims at providing the electromagnetic actuator which can be slimmed according to a coil winding outer diameter, ensuring the sealing performance between a fixed iron core and a coil part.

前記目的を達成するために、本発明は、固定鉄心の外周外側に、筒状部を有する可動鉄心の前記筒状部がその軸方向に沿って移動可能に設けられ、前記筒状部の外周外側にコイル部が設けられた電磁アクチュエータにおいて、
前記固定鉄心は、前記筒状部の端部から突出する突出部を有し、
この突出部と前記コイル部との間に環状のシール部材が設けられていることを特徴とする。 In order to achieve the above object, the present invention provides an outer periphery of a fixed iron core, wherein the tubular portion of the movable iron core having a tubular portion is provided so as to be movable along an axial direction thereof. In the electromagnetic actuator provided with a coil part on the outside,
The fixed iron core has a protruding portion protruding from an end portion of the cylindrical portion,
An annular seal member is provided between the protruding portion and the coil portion.

本発明においては、筒状部の端部から突出する突出部と、コイル部との間には径方向において、少なくとも筒状部の肉厚の分だけの隙間が設けられる。したがって、この隙間において、突出部とコイル部との間に環状のシール部材が設けられることによって、ボビンの外径を大きくしなくても、固定鉄心とコイル部との間のシール性を確保できる。したがって、固定鉄心とコイル部との間のシール性を確保しつつ、コイル巻外径に合わせたスリム化を行える。   In the present invention, a gap corresponding to at least the thickness of the cylindrical portion is provided in the radial direction between the protruding portion protruding from the end of the cylindrical portion and the coil portion. Therefore, in this gap, an annular seal member is provided between the protruding portion and the coil portion, so that the sealing performance between the fixed iron core and the coil portion can be ensured without increasing the outer diameter of the bobbin. . Therefore, it is possible to achieve slimming in accordance with the outer diameter of the coil winding while ensuring the sealing performance between the fixed iron core and the coil portion.

本発明の前記構成において、前記突出部に前記筒状部の軸と直交する鍔状部が形成され、この鍔状部と前記コイル部の端面との間に前記シール部材が設けられているのが好ましい。   In the above configuration of the present invention, a hook-like part perpendicular to the axis of the cylindrical part is formed in the protruding part, and the seal member is provided between the hook-like part and the end surface of the coil part. Is preferred.

このような構成によれば、鍔状部とコイル部の端面との間にシール部材が設けられているので、このシール部材によって固定鉄心とコイル部との間の平面シールを確実に行うことができる。   According to such a configuration, since the seal member is provided between the flange-shaped portion and the end surface of the coil portion, it is possible to reliably perform planar sealing between the fixed iron core and the coil portion by the seal member. it can.

また、本発明の前記構成において、前記固定鉄心に対して、その軸線方向に所定のギャップを介して対向して配置された他の固定鉄心を備え、
前記可動鉄心は、前記固定鉄心の外周外側に設けられた前記筒状部と、前記ギャップを横切るようにして設けられて、前記筒状部の底を構成する底部とを有し、
前記他の固定鉄心の外周面と前記コイル部の内周面との間に他のシール部材が設けられていてもよい。 Further, in the configuration of the present invention, the fixed iron core includes another fixed iron core disposed to face the fixed iron core with a predetermined gap in the axial direction thereof,
The movable iron core has the cylindrical portion provided on the outer periphery of the fixed iron core, and a bottom portion that is provided so as to cross the gap and constitutes the bottom of the cylindrical portion,
Another seal member may be provided between the outer peripheral surface of the other fixed iron core and the inner peripheral surface of the coil portion.

このような構成によれば、２つの固定鉄心の間のギャップを可動鉄心の底部が横切るように構成されているので、ギャップを通過する磁束が他へ漏れることなく、底部を通過して電磁力を発生させることになり、吸引力発生効率が向上し、大きな吸引力を得ることができる。また、２つの固定鉄心が底部に互いに反対側から面することになり、互いの干渉を排して広い受け渡し面を確保でき、その点からも吸引力発生効率が向上する。
また、他の固定鉄心の外周面と前記コイル部の内周面との間に他のシール部材が設けられているので、このシール部材によって他の固定鉄心とコイル部との間の径シールを確実に行うことができる。 According to such a configuration, since the bottom portion of the movable core crosses the gap between the two fixed cores, the magnetic flux passing through the gap passes through the bottom portion without leaking to the electromagnetic force. As a result, the suction force generation efficiency is improved and a large suction force can be obtained. Further, the two fixed iron cores face each other from the opposite sides, so that it is possible to secure a wide delivery surface by eliminating mutual interference, and the suction force generation efficiency is also improved in this respect.
In addition, since another seal member is provided between the outer peripheral surface of the other fixed iron core and the inner peripheral surface of the coil portion, the seal between the other fixed iron core and the coil portion can be sealed with this seal member. It can be done reliably.

本発明によれば、固定鉄心が、可動鉄心の筒状部の端部から突出する突出部を有し、この突出部とコイル部との間に環状のシール部材が設けられているので、固定鉄心とコイル部との間のシール性を確保しつつコイル巻外径に合わせたスリム化を行える。   According to the present invention, the fixed iron core has a protruding portion that protrudes from the end of the cylindrical portion of the movable iron core, and an annular seal member is provided between the protruding portion and the coil portion. Slimming in accordance with the outer diameter of the coil winding can be performed while ensuring a sealing property between the iron core and the coil portion.

本発明の実施の形態に係るアクチュエータを示すもので、その断面図である。1 is a sectional view showing an actuator according to an embodiment of the present invention. 同、アクチュエータの要部を示す概略図である。It is the schematic which shows the principal part of an actuator similarly. 同、コイルの巻き数が少ない場合のアクチュエータの要部を示す概略図である。It is the schematic which shows the principal part of an actuator in case the number of turns of a coil is small similarly. 従来のアクチュエータの一例を示すもので、その断面図である。An example of a conventional actuator is shown and is a sectional view thereof. 図４におけるＸ円部の拡大図である。It is an enlarged view of the X circle part in FIG.

以下、本発明の実施の形態について図面を参照して説明する。
図１は、本発明の実施形態に係る電磁アクチュエータを示す断面図である。この電磁アクチュエータは、例えば、ディーゼル内燃機関の燃料レバーを停止方向に作動させ、機関を自動停止させるために、または４輪のマニュアルトランスミッション車においてリバースセレクトロックを自動的に行なわせるために用いられるものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an electromagnetic actuator according to an embodiment of the present invention. This electromagnetic actuator is used, for example, to operate a fuel lever of a diesel internal combustion engine in a stop direction to automatically stop the engine, or to automatically perform a reverse select lock in a four-wheel manual transmission vehicle. It is.

この電磁アクチュエータは、軸線Ｏの方向に所定のギャップＧを介して対向配置された第１の固定鉄心（請求項３における他の固定鉄心）１１および第２の固定鉄心（請求項１における固定鉄心）１２とを備えている。
第２の固定鉄心１２の外周外側には、筒状部１５ａを有する可動鉄心１５がその軸方向に沿って移動可能に設けられている。また、筒状部１５ａの外周外側と第１の固定鉄心１１の外周外側に、コイル部１６が設けられている。 The electromagnetic actuator includes a first fixed iron core (another fixed iron core in claim 3) 11 and a second fixed iron core (fixed iron core in claim 1) arranged opposite to each other with a predetermined gap G in the direction of the axis O. ) 12.
A movable iron core 15 having a cylindrical portion 15a is provided on the outer periphery of the second fixed iron core 12 so as to be movable along the axial direction. In addition, a coil portion 16 is provided on the outer periphery of the cylindrical portion 15 a and on the outer periphery of the first fixed iron core 11.

なお、図１においては、軸線Оより左側は可動鉄心１５が固定鉄心１１に吸引されて固定鉄心１１側に移動した状態、軸線Оより右側は可動鉄心１５が固定鉄心１２側に位置している状態を示している。   In FIG. 1, the movable iron core 15 is attracted to the fixed iron core 11 and moved to the fixed iron core 11 side on the left side of the axis О, and the movable iron core 15 is located on the fixed iron core 12 side on the right side of the axis О. Indicates the state.

コイル部１６は、２つの固定鉄心１１，１２および可動鉄心１５に磁界を及ぼしてこれらに磁路を形成し、可動鉄心１５を軸線Ｏに沿って移動させるものであり、ボビン１６ａと、このボビン１６ａに巻き付けられたコイル１６ｂとを備えている。
これらの各部材（固定鉄心１１，１２、可動鉄心１５、コイル部１６）は基本的に回転対称に、すなわち断面が円形状に形成され、円筒形のハウジング３０の中に収容されている。 The coil unit 16 applies a magnetic field to the two fixed iron cores 11 and 12 and the movable iron core 15 to form a magnetic path therein, and moves the movable iron core 15 along the axis O. The bobbin 16a and the bobbin And a coil 16b wound around 16a.
Each of these members (the fixed iron cores 11 and 12, the movable iron core 15, and the coil portion 16) is basically rotationally symmetric, that is, has a circular cross section and is accommodated in a cylindrical housing 30.

２つの固定鉄心１１，１２はそれぞれ上下の端面側に鍔状部２１，２２を有しており、コイル部１６によって発生した磁界をこの鍔状部２１，２２を経由して誘導し、ギャップＧに密度の高い磁束を形成する。コイル部１６のコイル１６ｂに通電すると２つの固定鉄心１１，１２から可動鉄心１５に対してそれぞれ吸引力が発生するが、後述するように、第１の固定鉄心１１の吸引力の方が大きいので、通電時には可動鉄心１５は第１の固定鉄心１１に向けて移動する。つまり、第１の固定鉄心１１は主に吸引作用を行うものであり、第２の固定鉄心１２は磁束誘導作用を行なうものである。第１の固定鉄心１１には軸線Ｏに沿って貫通孔１１ａが形成され、この貫通孔１１ａに２つの軸受１７，１７を介してシャフト２０が移動自在に設置され、このシャフト２０の先端は可動鉄心１５に固定されている。第２の固定鉄心１２の外径は第１の固定鉄心１１のそれよりも小さくなっており、それによってコイル部１６の内面との間に、可動鉄心１５の筒状部１５ａを配置する空間が形成されている。   The two fixed iron cores 11 and 12 have flange portions 21 and 22 on the upper and lower end surfaces, respectively, and guide the magnetic field generated by the coil portion 16 via the flange portions 21 and 22, and the gap G To form a high-density magnetic flux. When the coil 16b of the coil portion 16 is energized, an attractive force is generated from the two fixed iron cores 11 and 12 to the movable iron core 15, respectively. However, as will be described later, the first fixed iron core 11 has a larger attractive force. When energized, the movable iron core 15 moves toward the first fixed iron core 11. That is, the first fixed iron core 11 mainly performs a suction action, and the second fixed iron core 12 performs a magnetic flux induction action. A through hole 11a is formed in the first fixed core 11 along the axis O, and a shaft 20 is movably installed in the through hole 11a via two bearings 17 and 17, and the tip of the shaft 20 is movable. It is fixed to the iron core 15. The outer diameter of the second fixed iron core 12 is smaller than that of the first fixed iron core 11, so that a space for arranging the cylindrical portion 15 a of the movable iron core 15 is provided between the inner surface of the coil portion 16. Is formed.

可動鉄心１５は、軸線Ｏ方向に沿って延びる筒状部１５ａと、ギャップＧを横切るように軸線Ｏに交差する方向に延びる底部１５ｂとから、カップ状（有底円筒状）に形成されており、筒状部１５ａが磁束誘導部を構成し、底部１５ｂが磁束作用部を構成している。   The movable iron core 15 is formed in a cup shape (bottomed cylindrical shape) from a cylindrical portion 15a extending along the axis O direction and a bottom portion 15b extending in a direction intersecting the axis O so as to cross the gap G. The cylindrical portion 15a constitutes a magnetic flux guiding portion, and the bottom portion 15b constitutes a magnetic flux acting portion.

そして、底部１５ｂの中央に形成された貫通孔にシャフト２０の先端が挿入され、固定されている。筒状部（磁束誘導部）１５ａの内面は第２の固定鉄心１２の外面と小さい隙間をもって対面しており、第２の固定鉄心１２と可動鉄心１５の間の磁束の大部分がこれらの面にほぼ垂直な向き、すなわち、軸線Ｏに垂直な向きに沿ってここを通過することになる。したがって、第２の固定鉄心１２と可動鉄心１５の間では軸線Ｏ方向の力はほとんど発生しない。一方、第１の固定鉄心１１は可動鉄心５の底部（磁束作用部）１５ｂのみに面しており、ここに生成する磁束は軸線Ｏ方向成分を持つから、軸線Ｏ方向の吸引力が発生する。したがって、可動鉄心１５には、第１の固定鉄心１１に向かう吸引力が作用する。   And the front-end | tip of the shaft 20 is inserted and fixed to the through-hole formed in the center of the bottom part 15b. The inner surface of the cylindrical portion (magnetic flux guiding portion) 15a faces the outer surface of the second fixed iron core 12 with a small gap, and most of the magnetic flux between the second fixed iron core 12 and the movable iron core 15 is these surfaces. It passes here along a direction substantially perpendicular to the axis, that is, a direction perpendicular to the axis O. Therefore, almost no force in the direction of the axis O is generated between the second fixed iron core 12 and the movable iron core 15. On the other hand, the first fixed iron core 11 faces only the bottom (magnetic flux acting part) 15b of the movable iron core 5, and the magnetic flux generated here has a component in the axis O direction, so that an attractive force in the axis O direction is generated. . Accordingly, a suction force toward the first fixed iron core 11 acts on the movable iron core 15.

なお、本実施の形態では、第１の固定鉄心１１のギャップＧ側の端面には、側面が開口部側に広がるテーパ面３１を有する凹部３２が形成されており、可動鉄心１５のこれに対向する部分である底部（磁束作用部）１５ｂはこの凹部３２に対応する形状に形成されている。すなわち、この例の磁束作用部１５ｂは、凹部３２のテーパ面３１に対応するテーパ面を持つ第１の作用部３４と、凹部３２の底面に対応する平面を持つ第２の作用部３５とを有している。このような構成により、可動鉄心１５の変位に対する軸線Ｏ方向の吸引力の変化を小さくして、ストロークの範囲での吸引力の変化を抑制し、リニアな吸引力特性を得ることができる。   In the present embodiment, the end surface on the gap G side of the first fixed iron core 11 is formed with a recess 32 having a tapered surface 31 whose side surface is widened toward the opening, and is opposed to this of the movable iron core 15. The bottom portion (magnetic flux acting portion) 15b, which is a portion to be formed, is formed in a shape corresponding to the concave portion 32. That is, the magnetic flux acting portion 15b in this example includes a first acting portion 34 having a tapered surface corresponding to the tapered surface 31 of the recessed portion 32 and a second acting portion 35 having a plane corresponding to the bottom surface of the recessed portion 32. Have. With such a configuration, the change in the suction force in the direction of the axis O relative to the displacement of the movable iron core 15 can be reduced, the change in the suction force in the stroke range can be suppressed, and a linear suction force characteristic can be obtained.

前記第２の固定鉄心１２は、円柱状の固定鉄心本体１２ａの上端部に前記鍔状部２２を一体的に形成して構成されており、固定鉄心本体１２ａの上端部１２ｂが可動鉄心１５の筒状部１５ａの上端部から突出する突出部１２ｂを構成している。そして、この突出部１２ｂの上端に前記鍔状部２２が固定鉄心本体１２ａと同軸に形成されている。   The second fixed iron core 12 is formed by integrally forming the flange-like portion 22 at the upper end of a cylindrical fixed iron core main body 12 a, and the upper end 12 b of the fixed iron core main body 12 a is formed of the movable iron core 15. The protrusion part 12b which protrudes from the upper end part of the cylindrical part 15a is comprised. And the said hook-shaped part 22 is formed in the upper end of this protrusion part 12b coaxially with the fixed iron core main body 12a.

前記固定鉄心１２の突出部１２ｂとコイル部１６のボビン１６ａとの間に、Ｏリングで構成された環状のシール部材１８が設けられている。
すなわち、ボビン１６ａの上端面には、シール部材１８を嵌め込むための凹部が形成されており、この凹部にシール部材１８が嵌め込まれている。シール部材１８の上半分は凹部から上方に突出しており、この突出したシール部材１８が前記鍔状部２２に密接している。このようにして、鍔状部２２とコイル部１６のボビン１６ａの端面との間にシール部材１８が設けられている。このシール部材１８は平面シールを構成している。 An annular seal member 18 formed of an O-ring is provided between the protruding portion 12 b of the fixed iron core 12 and the bobbin 16 a of the coil portion 16.
That is, a recess for fitting the seal member 18 is formed on the upper end surface of the bobbin 16a, and the seal member 18 is fitted in the recess. The upper half of the sealing member 18 protrudes upward from the recess, and the protruding sealing member 18 is in close contact with the flange-shaped portion 22. In this way, the seal member 18 is provided between the bowl-shaped portion 22 and the end surface of the bobbin 16a of the coil portion 16. The seal member 18 constitutes a flat seal.

また、前記固定鉄心１１とコイル部１６との間に他のシール部材１９が設けられている。すなわち、コイル部１６のボビン１６ａの下端部内周面には、シール部材１９を嵌め込むための凹部が形成されており、この凹部にシール部材１９が嵌め込まれている。シール部材１９の内側半分は凹部から内方に突出しており、この突出したシール部材１９が固定鉄心１１の外周面と鍔状部２１に密接している。このようにして、固定鉄心１１の外周面とコイル部１６の内周面との間に他のシール部材１９が設けられている。この他のシール部材１９は径シールを構成している。   Further, another seal member 19 is provided between the fixed iron core 11 and the coil portion 16. That is, a recess for fitting the seal member 19 is formed on the inner peripheral surface of the lower end portion of the bobbin 16a of the coil portion 16, and the seal member 19 is fitted in this recess. The inner half of the seal member 19 protrudes inward from the recess, and the protruded seal member 19 is in close contact with the outer peripheral surface of the fixed iron core 11 and the flange portion 21. In this way, another seal member 19 is provided between the outer peripheral surface of the fixed iron core 11 and the inner peripheral surface of the coil portion 16. The other seal member 19 constitutes a diameter seal.

本実施の形態によれば、図２および図３に示すように、可動鉄心１５の筒状部１５ａの端部から突出する、固定鉄心１２の突出部１２ｂと、コイル部１６のボビン１６ａとの間には径方向において、少なくとも筒状部１５ａの肉厚の分だけの隙間Ｓが設けられる。
したがって、この隙間Ｓにおいて、突出部１２ｂとコイル部１６のボビン１６ａとの間に環状のシール部材１８が設けられることによって、ボビン１６ａの外径を大きくしなくても、固定鉄心１２とコイル部１６との間のシール性を確保できる。したがって、固定鉄心１２とコイル部１６との間のシール性を確保しつつ、コイル巻外径に合わせたスリム化を行える。つまり、図２に示すコイル部１６のコイル巻き数が、図３に示すように、少なくなった場合（コイル１６ｂの径方向の厚さが小さくなった場合）、それに合わせてボビン１６ａの径を小さくできるので、シール性を確保しつつコイル巻外径に合わせたスリム化を行える。
また、シール部材１８をコイル部１６の内径より内側に配置できるので、シール部材１８の径サイズを小さくでき、その分コスト低減を図ることができる。 According to the present embodiment, as shown in FIGS. 2 and 3, the protrusion 12 b of the fixed iron core 12 that protrudes from the end of the cylindrical portion 15 a of the movable iron core 15 and the bobbin 16 a of the coil portion 16 are provided. A gap S corresponding to at least the thickness of the cylindrical portion 15a is provided in the radial direction.
Accordingly, in the gap S, the annular seal member 18 is provided between the protruding portion 12b and the bobbin 16a of the coil portion 16, so that the fixed iron core 12 and the coil portion can be formed without increasing the outer diameter of the bobbin 16a. 16 can be secured. Therefore, it is possible to achieve slimming in accordance with the outer diameter of the coil winding while ensuring the sealing performance between the fixed iron core 12 and the coil portion 16. That is, when the number of coil turns of the coil portion 16 shown in FIG. 2 decreases as shown in FIG. 3 (when the radial thickness of the coil 16b decreases), the diameter of the bobbin 16a is adjusted accordingly. Since it can be made smaller, it can be slimmed to match the outer diameter of the coil winding while ensuring sealing performance.
Further, since the seal member 18 can be disposed inside the inner diameter of the coil portion 16, the diameter size of the seal member 18 can be reduced, and the cost can be reduced accordingly.

また、固定鉄心１２の鍔状部２２とコイル部１６のボビン１６ａの端面との間にシール部材１８が設けられているので、このシール部材１８によって固定鉄心１２とコイル部１６との間の平面シールを確実に行うことができる。
さらに、固定鉄心１１の外周面とコイル部１６のボビン１６ａとの間にシール部材１９が設けられているので、このシール部材１９によって固定鉄心１１とコイル部１６との間の径シールを確実に行うことができる。 Further, since the seal member 18 is provided between the flange-shaped portion 22 of the fixed iron core 12 and the end surface of the bobbin 16 a of the coil portion 16, a plane between the fixed iron core 12 and the coil portion 16 is provided by the seal member 18. Sealing can be performed reliably.
Further, since the seal member 19 is provided between the outer peripheral surface of the fixed iron core 11 and the bobbin 16a of the coil portion 16, the seal member 19 ensures a radial seal between the fixed iron core 11 and the coil portion 16. It can be carried out.

また、２つの固定鉄心１１，１２の間のギャップＧを可動鉄心１５の底部（磁束作用部）１５ｂが横切るように構成されているので、ギャップＧを通過する磁束が他へ漏れることなく、底部（磁束作用部）１５を通過して電磁力を発生させることになり、吸引力発生効率が向上し、大きな吸引力を得ることができる。また、２つの固定鉄心１１，１２が底部（磁束作用部）１５ｂに互いに反対側から面することになり、互いの干渉を排して広い受け渡し面を確保でき、その点からも吸引力発生効率が向上する。   Further, since the bottom portion (magnetic flux acting portion) 15b of the movable iron core 15 crosses the gap G between the two fixed iron cores 11 and 12, the bottom portion does not leak the magnetic flux passing through the gap G to the other. (Magnetic flux action part) 15 will be passed and an electromagnetic force will be generated, the attraction | suction force generation efficiency will improve and a big attraction | suction force can be obtained. Further, the two fixed iron cores 11 and 12 face the bottom portion (magnetic flux acting portion) 15b from the opposite sides, so that it is possible to secure a wide delivery surface by eliminating mutual interference. Will improve.

なお、本実施の形態では、２つの固定鉄心１１，１２のうち、固定鉄心１２の外周外側に、筒状部を有する可動鉄心の前記筒状部がその軸方向に沿って移動可能に設けられた電磁アクチュエータを例にとって説明したが、本発明はこれに限ることなく、例えば１つの固定鉄心の外周外側に筒状の可動鉄心が軸方向に移動可能に設けられた電磁アクチュエータにも適用できる。   In the present embodiment, of the two fixed iron cores 11 and 12, the cylindrical portion of the movable core having a cylindrical portion is provided on the outer periphery of the fixed iron core 12 so as to be movable along the axial direction. However, the present invention is not limited to this, but can be applied to an electromagnetic actuator in which a cylindrical movable iron core is provided on the outer periphery of one fixed iron core so as to be movable in the axial direction.

１１ 第１の固定鉄心（他の固定鉄心）
１２ 第２の固定鉄心（固定鉄心）
１５ 可動鉄心
１５ａ 筒状部
１５ｂ 底部
１６ コイル部
１６ａ ボビン
１６ｂ コイル
１８ シール部材（平面シール）
１９ 他のシール部材（径シール）
２２ 鍔状部 11 First fixed iron core (other fixed iron cores)
12 Second fixed iron core (fixed iron core)
15 Movable iron core 15a Tubular part 15b Bottom part 16 Coil part 16a Bobbin 16b Coil 18 Seal member (flat seal)
19 Other seal members (diameter seals)
22 bowl

Claims (3)

固定鉄心の外周外側に、筒状部を有する可動鉄心の前記筒状部がその軸方向に沿って移動可能に設けられ、前記筒状部の外周外側にコイル部が設けられた電磁アクチュエータにおいて、
前記固定鉄心は、前記筒状部の端部から突出する突出部を有し、
この突出部と前記コイル部との間に環状のシール部材が設けられていることを特徴とする電磁アクチュエータ。 In the electromagnetic actuator in which the cylindrical part of the movable iron core having a cylindrical part is provided on the outer peripheral outer side of the fixed iron core so as to be movable along the axial direction, and the coil part is provided on the outer peripheral outer side of the cylindrical part.
The fixed iron core has a protruding portion protruding from an end portion of the cylindrical portion,
An electromagnetic actuator, wherein an annular seal member is provided between the protruding portion and the coil portion. 前記突出部には前記筒状部の軸と直交する鍔状部が形成され、
この鍔状部と前記コイル部の端面との間に前記シール部材が設けられていることを特徴とする請求項１に記載の電磁アクチュエータ。 The protrusion is formed with a hook-shaped portion orthogonal to the axis of the cylindrical portion,
The electromagnetic actuator according to claim 1, wherein the seal member is provided between the flange-shaped portion and an end surface of the coil portion. 前記固定鉄心に対して、その軸線方向に所定のギャップを介して対向して配置された他の固定鉄心を備え、
前記可動鉄心は、前記固定鉄心の外周外側に設けられた前記筒状部と、前記ギャップを横切るようにして設けられて、前記筒状部の底を構成する底部とを有し、
前記他の固定鉄心の外周面と前記コイル部の内周面との間に他のシール部材が設けられていることを特徴とする請求項１または請求項２に記載に電磁アクチュエータ。 With respect to the fixed iron core, provided with another fixed iron core disposed to face the fixed iron core via a predetermined gap in the axial direction,
The movable iron core has the cylindrical portion provided on the outer periphery of the fixed iron core, and a bottom portion that is provided so as to cross the gap and constitutes the bottom of the cylindrical portion,
The electromagnetic actuator according to claim 1, wherein another seal member is provided between an outer peripheral surface of the other fixed iron core and an inner peripheral surface of the coil portion.
JP2012151665A 2012-07-05 2012-07-05 Electromagnetic actuator Pending JP2014017282A (en)

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JP2012151665A JP2014017282A (en) 2012-07-05 2012-07-05 Electromagnetic actuator
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IN10950DEN2014 IN2014DN10950A (en) 2012-07-05 2013-07-02
CN201380035460.1A CN104471655A (en) 2012-07-05 2013-07-02 Electromagnetic actuator
BR112014033103A BR112014033103A2 (en) 2012-07-05 2013-07-02 electromagnetic actuator

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