JPH073609Y2 - Electromagnetic device - Google Patents
Electromagnetic deviceInfo
- Publication number
- JPH073609Y2 JPH073609Y2 JP12601289U JP12601289U JPH073609Y2 JP H073609 Y2 JPH073609 Y2 JP H073609Y2 JP 12601289 U JP12601289 U JP 12601289U JP 12601289 U JP12601289 U JP 12601289U JP H073609 Y2 JPH073609 Y2 JP H073609Y2
- Authority
- JP
- Japan
- Prior art keywords
- iron core
- movable iron
- magnetic
- exciting coil
- fixed iron
- 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 - Lifetime
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Description
【考案の詳細な説明】 A.産業上の利用分野 本考案は可動鉄心の衝撃力を緩和することができる電磁
装置に関するものである。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an electromagnetic device capable of reducing the impact force of a movable iron core.
B.考案の概要 本考案は、筒状励磁コイル中に挿通される可動鉄心を上
記励磁コイルの付勢によって直線駆動する電磁装置にお
いて、上記励磁コイルの一方開口端側に設けられた固定
鉄心に一方端が接離される可動鉄心の他方端部に非磁性
体を設けることにより、この可動鉄心が磁気吸引されて
固定鉄心に近接したときに、磁気回路中の磁束を非磁性
体で絞り込み可動鉄心の衝撃力を緩和できるようにした
ものである。B. Outline of the Invention The present invention relates to an electromagnetic device that linearly drives a movable iron core inserted in a cylindrical exciting coil by energizing the exciting coil, to a fixed iron core provided on one open end side of the exciting coil. By providing a non-magnetic body at the other end of the movable core whose one end is in contact with and separated from it, when the movable core is magnetically attracted and approaches the fixed core, the magnetic flux in the magnetic circuit is narrowed down by the non-magnetic body. It is designed to reduce the impact force of.
C.従来の技術 周知のように励磁コイルの励磁により可動鉄心を直線方
向に動作させる電磁装置として、第３図に示すように筒
状の励磁コイル31の中空部に可動鉄心32を可動自在に設
けるとともに、この可動鉄心32の一端に操作桿33を設
け、上記励磁コイル31を磁気ヨーク34で囲み、操作桿33
を励磁コイル31の一方向開口部に設けた固定鉄心35に貫
通させて、可動鉄心の可動に応じて操作桿33により負荷
を駆動するようにしたものがある。C. Conventional Technology As is well known, as an electromagnetic device that moves a movable iron core in a linear direction by exciting the exciting coil, a movable iron core 32 is freely movable in a hollow portion of a cylindrical exciting coil 31 as shown in FIG. An operating rod 33 is provided at one end of the movable iron core 32, the exciting coil 31 is surrounded by a magnetic yoke 34, and the operating rod 33 is provided.
There is a type in which the load is driven by the operating rod 33 by penetrating the fixed iron core 35 provided in the one-way opening of the exciting coil 31 and moving the movable iron core.
この電磁装置は、励磁コイル31を励磁することにより固
定鉄心35と可動鉄心32との間に磁気吸引力が作用し、固
定鉄心35に可動鉄心32が磁気吸引される。この磁気吸引
は固定鉄心35と可動鉄心32とのギャップＸが小さくなる
にしたがって急激に増大する特性を有する。すなわち、
固定鉄心35と可動鉄心32とのギャップＸが最大の時に磁
気吸引力は最も小さくなり、ギャップＸが小さくなるに
したがって磁気吸引力が増大し、ギャップＸ＝０の時に
磁気吸引力が最も大きくなる。このとき、可動鉄心32の
動作ストロークを大きく設定するほどおおきな磁気吸引
力が必要になるため、ギャップＸ＝０時における可動鉄
心32の衝撃力の影響は増大することになる。In this electromagnetic device, by exciting the exciting coil 31, a magnetic attraction force acts between the fixed iron core 35 and the movable iron core 32, and the movable iron core 32 is magnetically attracted to the fixed iron core 35. This magnetic attraction has a characteristic that it rapidly increases as the gap X between the fixed iron core 35 and the movable iron core 32 decreases. That is,
When the gap X between the fixed iron core 35 and the movable iron core 32 is maximum, the magnetic attraction force becomes the smallest, the magnetic attraction force increases as the gap X becomes smaller, and when the gap X = 0, the magnetic attraction force becomes the largest. . At this time, as the operation stroke of the movable iron core 32 is set to be larger, a larger magnetic attraction force is required, so that the influence of the impact force of the movable iron core 32 when the gap X = 0 is increased.
D.考案が解決しようとする課題 従来技術の電磁装置では、可動鉄心32が固定鉄心35に衝
突して移動が規制されるため、この可動鉄心32の衝撃を
繰り返し受けると機械的寿命が著しく低下するととも
に、過大な衝撃力の反動等により可動鉄心32が振動し負
荷側にチャタリングが生じるおそれがある。D. Problems to be Solved by the Invention In the electromagnetic device of the prior art, since the movable iron core 32 collides with the fixed iron core 35 and its movement is restricted, repeated impact of the movable iron core 32 significantly reduces the mechanical life. At the same time, the movable iron core 32 may vibrate due to reaction of an excessive impact force or the like, and chattering may occur on the load side.
このような過大な衝撃力に耐え得るように構造を強化し
たり、または可動鉄心の衝撃力を緩和するダンパー等を
設けると、価格的に高価となるとともに小形軽量化を図
るうえで不利になる。If the structure is strengthened to withstand such an excessive impact force, or if a damper or the like is provided to alleviate the impact force of the movable iron core, it becomes expensive in terms of price and disadvantageous in reducing size and weight. .
本考案は上記の問題点に着目してなされたもので、簡単
な構造で可動鉄心の衝撃力を緩和し得る電磁装置を提供
することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic device capable of reducing the impact force of a movable iron core with a simple structure.
E.課題を解決するための手段 本考案は上記目的を達成するために、筒状の励磁コイル
と、この励磁コイルを囲むように設けられ、上記励磁コ
イルの一方開口端側に固定鉄心を有する磁気ヨークと、
上記励磁コイルの中空部に可動自在に設けられ、且つ上
記固定鉄心と反対側端部に非磁性体を設けた可動鉄心に
より電磁装置を構成する。E. Means for Solving the Problem In order to achieve the above-mentioned object, the present invention has a cylindrical excitation coil and a fixed iron core provided around the excitation coil and on one open end side of the excitation coil. A magnetic yoke,
An electromagnetic device is constituted by a movable iron core provided movably in the hollow portion of the exciting coil and having a non-magnetic material at the end opposite to the fixed iron core.
F.作用 可動鉄心が磁気吸引されて固定鉄心に近接すると、可動
鉄心の端部に設けられた非磁性体が上記磁気回路中に徐
々に介在し、この非磁性体により磁気回路中の磁束が徐
々に絞り込まれる。この磁束の絞り込み量に応じて磁気
吸引力が弱められて可動鉄心の衝撃力が緩和される。F. Action When the movable iron core is magnetically attracted and approaches the fixed iron core, the non-magnetic material provided at the end of the movable iron core gradually intervenes in the magnetic circuit, and this non-magnetic material causes magnetic flux in the magnetic circuit. It is gradually narrowed down. The magnetic attraction force is weakened according to the amount of narrowing down of the magnetic flux, and the impact force of the movable iron core is relaxed.
G.実施例 以下、本考案を第１図および第２図に示す実施例に基づ
いて説明する。G. Embodiment Hereinafter, the present invention will be described based on an embodiment shown in FIG. 1 and FIG.
第１図および第２図は本考案に係る電磁装置の一実施例
を示し、第１図は動作前の状態を示す概略的構成図で、
第２図は動作後の状態を示す概略的構成図である。図中
１は絶縁銅線等を円筒状に巻装した励磁コイルで、この
励磁コイル１を囲むように強磁性体の磁気ヨーク２を設
けるとともに、励磁コイル１の一方開口端に固定鉄心３
を嵌着させる。図示例では、磁気ヨーク２に固定鉄心３
を一体に形成してあるが、組立を容易にするために固定
鉄心３を別体に形成するとよい。この磁気ヨーク２に組
込まれた励磁コイル１の他方開口端より、固定鉄心３に
接離自在に可動鉄心４を挿通させる。この可動鉄心４の
一端には、固定鉄心３の透孔より外部に導出され、図示
しない負荷に連結される操作桿５が一体に形成されてお
り、また固定鉄心３と反対側の他端部には非磁性体６が
設けられている。この非磁性体６は、第２図に示すよう
に可動鉄心３が固定鉄心３に近接したときに、磁気ヨー
ク2,固定鉄心3,可動鉄心４からなる磁気回路中に介在す
るように可動鉄心４の後端部に設けられる。1 and 2 show one embodiment of an electromagnetic device according to the present invention, and FIG. 1 is a schematic configuration diagram showing a state before operation,
FIG. 2 is a schematic configuration diagram showing a state after the operation. In the figure, reference numeral 1 denotes an exciting coil in which an insulating copper wire or the like is wound in a cylindrical shape. A magnetic yoke 2 made of a ferromagnetic material is provided so as to surround the exciting coil 1, and a fixed iron core 3 is provided at one open end of the exciting coil 1.
Fit in. In the illustrated example, the magnetic core 2 and the fixed iron core 3
Although it is integrally formed, the fixed iron core 3 may be formed separately for easy assembly. The movable iron core 4 is inserted into and removed from the fixed iron core 3 through the other opening end of the exciting coil 1 incorporated in the magnetic yoke 2. An operating rod 5 is integrally formed at one end of the movable iron core 4 and is led out from the through hole of the fixed iron core 3 and connected to a load (not shown). The other end of the movable iron core 4 opposite to the fixed iron core 3 is formed. Is provided with a non-magnetic body 6. As shown in FIG. 2, the non-magnetic body 6 is arranged so that when the movable iron core 3 approaches the fixed iron core 3, the movable iron core 3 is interposed in the magnetic circuit composed of the magnetic yoke 2, the fixed iron core 3 and the movable iron core 4. 4 is provided at the rear end.
次に、この実施例の作用を説明する。Next, the operation of this embodiment will be described.
第１図に示すように可動鉄心４が固定鉄心３より開離し
ている状態で励磁コイル１を励磁すると、磁気回路中に
φ1の磁束が発生する。この磁束φ1は磁気ヨーク2,固定
鉄心3,可動鉄心４を通して透過される。これにより固定
鉄心３と可動鉄心４との間に磁気吸引力が作用し、可動
鉄心４は固定鉄心３に磁気吸引されて図示左方向に移動
する。このとき、固定鉄心３と可動鉄心４とのギャップ
X1がX2と小さくなるにしたがって磁気吸引力が増大し、
可動鉄心４が加速される。As shown in FIG. 1, when the exciting coil 1 is excited with the movable iron core 4 separated from the fixed iron core 3, a magnetic flux of φ 1 is generated in the magnetic circuit. This magnetic flux φ 1 is transmitted through the magnetic yoke 2, the fixed iron core 3, and the movable iron core 4. As a result, a magnetic attraction force acts between the fixed iron core 3 and the movable iron core 4, and the movable iron core 4 is magnetically attracted by the fixed iron core 3 and moves leftward in the drawing. At this time, the gap between the fixed iron core 3 and the movable iron core 4
As X 1 becomes smaller than X 2 , the magnetic attractive force increases,
The movable iron core 4 is accelerated.
そして、第２図に示すように可動鉄心４が固定鉄心２に
近接すると、可動鉄心４の後端部に設けられた非磁性体
６が磁気回路を構成する磁気ヨーク２と可動鉄心４の間
に除去に介在し、磁気回路を透過する磁束がφ2に絞り
込まれる。この磁束φ2は可動鉄心４が固定鉄心に近づ
くほど絞り込まれ、この磁束φ2の絞り込み量に応じて
磁気吸引力が低下する。Then, as shown in FIG. 2, when the movable iron core 4 approaches the fixed iron core 2, the non-magnetic body 6 provided at the rear end of the movable iron core 4 causes a gap between the magnetic yoke 2 and the movable iron core 4 which form a magnetic circuit. The magnetic flux passing through the magnetic circuit, which is involved in the removal, is narrowed down to φ 2 . This magnetic flux φ 2 is narrowed down as the movable iron core 4 approaches the fixed iron core, and the magnetic attraction force is reduced according to the narrowing down amount of this magnetic flux φ 2 .
したがって、このような構成によれば、可動鉄心４が固
定鉄心３に近接すると可動鉄心４の後端部に設けられた
非磁性体６により、磁束が絞り込まれ磁気吸引力が弱め
られるために、可動鉄心４の衝撃力を緩和することがで
きる。これにより、機械的寿命を向上し得るとともに、
可動鉄心に接続される負荷側のチャタリングを防止する
ことができる。しかも、非磁性体６により磁気回路中の
磁気抵抗の現象を相殺することができるため、可動鉄心
４に作用する磁気吸引力が比較的フラットになり、可動
鉄心４の動作速度が安定する。Therefore, according to such a configuration, when the movable iron core 4 approaches the fixed iron core 3, the non-magnetic body 6 provided at the rear end portion of the movable iron core 4 narrows down the magnetic flux and weakens the magnetic attraction force. The impact force of the movable iron core 4 can be mitigated. This can improve the mechanical life and
Chattering on the load side connected to the movable core can be prevented. Moreover, since the phenomenon of magnetic resistance in the magnetic circuit can be canceled by the non-magnetic body 6, the magnetic attraction force acting on the movable iron core 4 becomes relatively flat, and the operating speed of the movable iron core 4 is stabilized.
また、可動鉄心４に非磁性体６を一体に組込むことによ
り、極めて簡単な構造となるため、小形軽量でしかも価
格的にも安価にできる。特に、衝撃力に耐え得るように
構造を強化したものや、ダンパー等を設けたものに比べ
て、小形軽量化を容易に図り得るとともに価格をさらに
安価にできる。In addition, since the non-magnetic body 6 is integrally incorporated into the movable iron core 4, the structure becomes extremely simple, so that it can be made small and lightweight and inexpensive. In particular, it is possible to easily reduce the size and weight and further reduce the price, as compared with a structure having a strengthened structure capable of withstanding an impact force or a structure provided with a damper or the like.
なお、本考案は上記実施例に限定されるものではなく、
要旨を変更しない範囲において種々変形して実施するこ
とができる。The present invention is not limited to the above embodiment,
Various modifications can be implemented without changing the gist.
H.考案の効果 以上に述べたように本考案によれば、可動鉄心の端部に
非磁性体を設けるという極めて簡単な構成にて可動鉄心
の衝撃力を緩和することができ、かつ小形軽量化および
低価格化を容易に図り得る電磁装置を提供することがで
きる。H. Effect of the Invention As described above, according to the present invention, the impact force of the movable iron core can be mitigated with a very simple structure in which the end of the movable iron core is provided with a non-magnetic material, and it is small and lightweight. It is possible to provide an electromagnetic device that can be easily made inexpensive and low in price.
第１図および第２図は本考案に係る電磁装置の一実施例
を示し、第１図は動作前の状態を示す概略構成図、第２
図は動作後の状態を示す概略的構成図、第３図は従来の
電磁装置を示す概略的構成図である。 １……励磁コイル、２……磁気ヨーク、３……固定鉄
心、４……可動鉄心、５……操作桿、６……非磁性体。1 and 2 show an embodiment of an electromagnetic device according to the present invention, and FIG. 1 is a schematic configuration diagram showing a state before operation, FIG.
FIG. 3 is a schematic configuration diagram showing a state after operation, and FIG. 3 is a schematic configuration diagram showing a conventional electromagnetic device. 1 ... Excitation coil, 2 ... Magnetic yoke, 3 ... Fixed iron core, 4 ... Movable iron core, 5 ... Operation rod, 6 ... Non-magnetic body.
Claims (1)
むように設けられ、上記励磁コイルの一方開口端側に固
定鉄心を有する磁気ヨークと、上記励磁コイルの中空部
に可動自在に設けられ、且つ上記固定鉄心と反対側端部
に非磁性体を設けた可動鉄心とを具備したことを特徴と
する電磁装置。1. A cylindrical exciting coil, a magnetic yoke provided so as to surround the exciting coil and having a fixed iron core on one opening end side of the exciting coil, and movably provided in a hollow portion of the exciting coil. And a movable iron core provided with a non-magnetic material at the end opposite to the fixed iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12601289U JPH073609Y2 (en) | 1989-10-27 | 1989-10-27 | Electromagnetic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12601289U JPH073609Y2 (en) | 1989-10-27 | 1989-10-27 | Electromagnetic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0365210U JPH0365210U (en) | 1991-06-25 |
| JPH073609Y2 true JPH073609Y2 (en) | 1995-01-30 |
Family
ID=31673852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12601289U Expired - Lifetime JPH073609Y2 (en) | 1989-10-27 | 1989-10-27 | Electromagnetic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073609Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4554696B2 (en) * | 2008-06-12 | 2010-09-29 | 三菱電機株式会社 | Ignition device for internal combustion engine |
-
1989
- 1989-10-27 JP JP12601289U patent/JPH073609Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0365210U (en) | 1991-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |