JP2002186245A - Eddy current speed reducer - Google Patents
Eddy current speed reducerInfo
- Publication number
- JP2002186245A JP2002186245A JP2000378088A JP2000378088A JP2002186245A JP 2002186245 A JP2002186245 A JP 2002186245A JP 2000378088 A JP2000378088 A JP 2000378088A JP 2000378088 A JP2000378088 A JP 2000378088A JP 2002186245 A JP2002186245 A JP 2002186245A
- Authority
- JP
- Japan
- Prior art keywords
- eddy current
- cylinder
- reduction device
- current reduction
- braking drum
- 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
Links
Landscapes
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は車両などの摩擦ブレ
ーキを補助する渦電流減速装置、特に永久磁石および/
または電磁石と制動ドラムとの相対回転により、一方の
回転体に発生する渦電流に基づく熱が効果的に冷却され
る渦電流減速装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eddy current reduction device for assisting a friction brake of a vehicle or the like, and more particularly, to a permanent magnet and / or eddy current reduction device.
Alternatively, the present invention relates to an eddy current reduction device in which heat based on eddy current generated in one rotating body is effectively cooled by relative rotation between an electromagnet and a braking drum.
【0002】[0002]
【従来の技術】従来、水冷式の渦電流減速装置として次
のようなものが知られている。即ち、歯車変速機の壁部
などに固定される不動の制動ドラム(ステータ)は、内
部に設けた水室を冷却水が循環するようになつている。
制動ドラムの内部に配設される磁石支持筒は、歯車変速
機の出力回転軸に結合される。磁石支持筒に支持された
電磁石に通電すると、制動ドラムと磁石支持筒との間に
磁気回路が形成され、回転する磁石支持筒に渦電流に基
づく制動力が発生する。上述の渦電流減速装置は渦電流
が発生する制動ドラムに、普通の鋼材(炭素鋼、鋳鋼、
合金鋼など)が使用されているので、発生する制動力の
効率が良くない。2. Description of the Related Art Heretofore, the following is known as a water-cooled eddy current reduction device. That is, the stationary brake drum (stator) fixed to the wall or the like of the gear transmission is configured such that cooling water circulates in a water chamber provided therein.
A magnet support cylinder disposed inside the brake drum is connected to an output rotation shaft of the gear transmission. When electricity is supplied to the electromagnet supported by the magnet support cylinder, a magnetic circuit is formed between the braking drum and the magnet support cylinder, and a braking force based on the eddy current is generated in the rotating magnet support cylinder. The above-mentioned eddy current reduction device uses ordinary steel materials (carbon steel, cast steel,
Alloy steel) is used, so that the efficiency of the generated braking force is not good.
【0003】[0003]
【発明が解決しようとする課題】本発明の課題は上述の
問題に鑑み、制動ドラムに渦電流が効率的に流れ、渦電
流による熱が効率的に冷却される渦電流減速装置を提供
することにある。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an eddy current reduction device in which an eddy current efficiently flows through a braking drum and heat generated by the eddy current is efficiently cooled. It is in.
【0004】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明の構成は電気導体からなる不動の制動ドラム
の内部に、回転軸に結合した磁石支持筒を配設し、該磁
石支持筒の外周面に前記制動ドラムの内周面に対向する
磁極片を有する多数の磁石を周方向等間隔に結合した渦
電流減速装置において、前記制動ドラムは断面溝形の本
体に、前記磁極片に対向する面に強磁性かつ導電性を有
する材料からなる筒体を結合したことを特徴とする。In order to solve the above-mentioned problems, according to the structure of the present invention, a magnet support cylinder connected to a rotating shaft is disposed inside an immovable brake drum made of an electric conductor, and the magnet support is provided. In an eddy current reduction device in which a number of magnets having magnetic pole pieces facing the inner circumferential surface of the braking drum on the outer circumferential surface of a cylinder are connected at equal intervals in a circumferential direction, the braking drum is provided in a main body having a groove-shaped cross section, A cylindrical body made of a ferromagnetic and conductive material is coupled to a surface facing the base member.
【0005】[0005]
【発明の実施の形態】本発明では制動ドラムの渦電流が
発生する内周壁を構成する筒体に、磁界が通りやすく電
気抵抗が小さい材料、例えば純鉄に近い低炭素鋼が好ま
しい。制動ドラムの筒体の両端部から両端壁にかけて、
例えば電気抵抗の小さいアルミニウムを用いて組み付け
る。制動ドラムの筒体はアルミニウムからなる本体に鋳
込むか、溶接によるか、圧入したボルトなどにより結合
する。DETAILED DESCRIPTION OF THE INVENTION In the present invention, it is preferable that the cylinder constituting the inner peripheral wall of the braking drum where an eddy current is generated is made of a material having a low magnetic resistance and a low electric resistance, for example, low carbon steel close to pure iron. From both ends of the cylinder of the braking drum to both end walls,
For example, it is assembled using aluminum having a small electric resistance. The cylinder body of the braking drum is joined to the main body made of aluminum by casting, welding, or by press-fitting bolts.
【0006】制動ドラムの内周壁を構成する筒体の軸方
向寸法は、磁石支持筒の電磁石の磁極片の幅とほぼ同寸
であればよく、筒体の両端には電気抵抗の小さい銅、ア
ルミニウムなどの環状体を配設する。筒体の内部に鋳鋼
などの補強筒を鋳込む場合は、筒体の材料とアルミニウ
ムとの密着性を良くするために、予め補強筒の表面にア
ルミニウムをコーテイングする。電磁石の鉄心には永久
磁石を埋込んで、電磁コイルの巻数を減じたり、または
電流を弱くしても、強い磁界が得られるようにする。The axial dimension of the cylinder constituting the inner peripheral wall of the braking drum may be substantially the same as the width of the pole piece of the electromagnet of the magnet support cylinder. An annular body such as aluminum is provided. When casting a reinforcing cylinder such as cast steel into the inside of the cylindrical body, aluminum is previously coated on the surface of the reinforcing cylinder in order to improve the adhesion between the material of the cylindrical body and aluminum. A permanent magnet is embedded in the iron core of the electromagnet so that a strong magnetic field can be obtained even if the number of turns of the electromagnetic coil is reduced or the current is weakened.
【0007】[0007]
【実施例】図1,2に示すように、本発明による渦電流
減速装置は不動の制動ドラム2と回転軸21に結合した
磁石支持筒18とを備えている。回転軸21には取付フ
ランジ22がスプライン嵌合され、ナツト23により締
結される。取付フランジ22に磁石支持筒18の内周面
に結合した取付片18aが重ね合され、ボルト20とナ
ツトにより結合される。磁石支持筒18の外周面には多
数の電磁石12が周方向等間隔に結合される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, an eddy current reduction device according to the present invention includes a stationary braking drum 2 and a magnet support tube 18 connected to a rotating shaft 21. A mounting flange 22 is spline-fitted to the rotating shaft 21 and fastened by a nut 23. The mounting piece 18a connected to the inner peripheral surface of the magnet support cylinder 18 is superimposed on the mounting flange 22, and is connected to the bolt 20 by a nut. A large number of electromagnets 12 are connected to the outer peripheral surface of the magnet support cylinder 18 at regular intervals in the circumferential direction.
【0008】電磁石12は磁石支持筒18に結合した鉄
心17に巻枠14を外嵌し、巻枠14に電磁コイル13
を巻装して構成される。鉄心17の内部には永久磁石1
6が埋め込まれ、電磁コイル13の電流負担を軽くす
る。制動ドラム2の筒体5に対向する鉄心17の端部に
は、強磁性体からなる磁極片15が鉄心17に締結され
る。鉄心17は磁石支持筒18に対して図示してないボ
ルトにより結合される。こうして、多数の電磁石12を
結合された磁石支持筒18は不動の制動ドラム2の内部
に同心に配設される。例えば歯車変速機の壁部に固定さ
れる制動ドラム2は、断面溝形の本体3に磁極片15に
対向する筒体5をボルト6により結合して内部に水室4
を区画される。水室4には入口25から冷却水が供給さ
れ、出口26から外部へ排出するように構成される。冷
却水の代りに歯車変速機を潤滑する潤滑油などを貫流さ
せるようにしてもよい。磁石支持筒18と鉄心17と磁
極片15は回転軸方向に積層された電磁鋼板など板材で
一体的に形成してもよい。The electromagnet 12 has a winding frame 14 fitted around an iron core 17 connected to a magnet support cylinder 18, and an electromagnetic coil 13
Is wound around. Permanent magnet 1 inside iron core 17
6 is buried to reduce the current load on the electromagnetic coil 13. A pole piece 15 made of a ferromagnetic material is fastened to the iron core 17 at the end of the iron core 17 facing the cylinder 5 of the braking drum 2. The iron core 17 is connected to the magnet support cylinder 18 by bolts (not shown). In this way, the magnet support tube 18 to which the many electromagnets 12 are connected is disposed concentrically inside the immobile brake drum 2. For example, a braking drum 2 fixed to a wall of a gear transmission has a main body 3 having a groove-shaped cross section and a cylindrical body 5 facing a magnetic pole piece 15 connected by bolts 6 to form a water chamber 4 therein.
Is partitioned. Cooling water is supplied to the water chamber 4 from an inlet 25 and discharged from an outlet 26 to the outside. Lubricating oil or the like for lubricating the gear transmission may flow through instead of the cooling water. The magnet support tube 18, the iron core 17, and the pole piece 15 may be integrally formed of a plate material such as an electromagnetic steel plate laminated in the rotation axis direction.
【0009】制動ドラム2は断面溝形の本体3を、耐熱
強度の大なる普通鋼、鋳鋼などから構成されるが、製造
経費の点では本体3をアルミニウムから鋳造する際に、
純鉄、または純鉄に近い材料、低炭素鋼などの強磁性体
からなり、電気抵抗の小さい材料からなる筒体5を鋳込
むのが好ましい。しかし、本体3の両端壁3aの切欠に
より薄肉とされた部分3bへ、筒体5を挟んでボルト6
により結合してもよい。特に、筒体5の両端にアルミニ
ウムからなる本体3の端壁3aが結合されることによ
り、筒体5を流れる渦電流の軸方向の広がりが促され、
制動トルクが高められる。The braking drum 2 has a groove-shaped main body 3 made of ordinary steel, cast steel, or the like having high heat resistance. However, in terms of manufacturing cost, when the main body 3 is cast from aluminum.
It is preferable to cast the cylindrical body 5 made of pure iron or a material close to pure iron, a ferromagnetic material such as low carbon steel, and made of a material having a small electric resistance. However, the bolts 6 are inserted into the portions 3b thinned by the cutouts of both end walls 3a of the main body 3 with the cylindrical body 5 interposed therebetween.
May be combined. In particular, since the end wall 3a of the main body 3 made of aluminum is coupled to both ends of the cylindrical body 5, the eddy current flowing through the cylindrical body 5 is promoted in the axial direction,
The braking torque is increased.
【0010】図3に示すように、アルミニウムからなる
本体3に、低炭素鋼などからなる筒体5をボルトにより
結合し、さらに筒体5の磁極片15に対向する内周面
に、銅、銅合金、ニツケル合金、ニツケルなどの被膜5
aをコーテイング、メツキなどにより形成するのが好ま
しい。As shown in FIG. 3, a cylinder 5 made of low carbon steel or the like is connected to a main body 3 made of aluminum by bolts, and further, copper or copper is attached to an inner peripheral surface of the cylinder 5 facing the pole piece 15. Coatings 5 of copper alloy, nickel alloy, nickel, etc.
a is preferably formed by coating, plating, or the like.
【0011】図4に実施例では、アルミニウム、鋳鋼ま
たは一般の鋼材からなる本体3に磁極片15に対向する
筒体5を結合するにあたり、端壁3aと筒体5の両端部
との間に、銅、銅合金などの電気良導体からなる環状体
5bを挟んでボルトにより結合するか、端壁3aの薄肉
部分3bに環状体5bを溶着、ニツケル臘付け、粉体肉
盛り、TIG溶接肉盛りなどにより結合する。環状体5
bは筒体5に発生する渦電流の軸方向の広がりを一層促
進する。図5に示すように、電気良導体からなる環状体
5bは鉄心17の軸方向の端部に接近して配設するのが
より効果的である。図5において、アルミニウムからな
る筒状の本体3と環状の端壁3aとは溶接により結合さ
れるか、ボルトにより結合される。In the embodiment shown in FIG. 4, when connecting the cylinder 5 facing the pole piece 15 to the main body 3 made of aluminum, cast steel or a general steel material, the cylinder 5 is disposed between the end wall 3a and both ends of the cylinder 5. , Copper, copper alloy, etc., is connected with a bolt by sandwiching the annular body 5b, or the annular body 5b is welded to the thin portion 3b of the end wall 3a, nickel brazing, powder overlay, TIG welding overlay. And so on. Annular body 5
b further promotes the spread of the eddy current generated in the cylindrical body 5 in the axial direction. As shown in FIG. 5, it is more effective to arrange the annular body 5b made of a good electric conductor close to the axial end of the iron core 17. In FIG. 5, a cylindrical main body 3 made of aluminum and an annular end wall 3a are connected by welding or connected by bolts.
【0012】図6に示す実施例では、アルミニウムまた
は鋳鋼や一般の鋼材からなる本体3に、純鉄に近い低炭
素鋼、低炭素合金鋼などの筒体5が結合され、端壁3a
から筒体5の端部に接する周壁部までの部分に、銅、銅
合金などからなる断面L字形の環状体5cが結合され
る。In the embodiment shown in FIG. 6, a cylindrical body 5 made of low-carbon steel or low-carbon alloy steel close to pure iron is joined to a main body 3 made of aluminum, cast steel, or a general steel material.
An annular body 5c made of copper, a copper alloy, or the like and having an L-shaped cross section is joined to a portion from to the peripheral wall portion in contact with the end of the cylindrical body 5.
【0013】図7に示す実施例では、本体3と筒体5を
アルミニウムから一体に鋳造する際に、筒体5の内部に
鋳鋼などからなる補強筒5dを鋳込むようにしたもので
ある。この場合、補強筒5dの表面には予めアルミニウ
ムの溶融メツキを施し、本体3との結合度を高めるのが
好ましい。In the embodiment shown in FIG. 7, when the main body 3 and the cylindrical body 5 are integrally cast from aluminum, a reinforcing cylinder 5d made of cast steel or the like is cast inside the cylindrical body 5. In this case, it is preferable that the surface of the reinforcing cylinder 5d is previously melted with aluminum to increase the degree of coupling with the main body 3.
【0014】図8,9に示す実施例では、軸方向に並ぶ
複数の電磁石12が磁石支持筒18に結合されるもので
あり、制動ドラム2と電磁石12の放熱性が高められ
る。In the embodiment shown in FIGS. 8 and 9, a plurality of electromagnets 12 arranged in the axial direction are connected to the magnet support tube 18, and the heat dissipation of the braking drum 2 and the electromagnets 12 is enhanced.
【0015】図10に示す実施例では、電磁石12の磁
極片15の軸方向中央部分に、周方向に延びるV溝31
を設ける一方、鋳鋼などの強磁性体からなる補強筒5d
に、V溝31に対向して、断面長方形の周方向の溝32
を設け、溝32にアルミニウムを鋳込むか、アルミニウ
ムからなる環状体を嵌合したものである。図11,12
に示す実施例では、軸方向に並べられた複数の電磁石1
2の間に対向して、補強筒5dの内周面に断面長方形の
溝32を設け、溝32にアルミニウムを鋳込むか、アル
ミニウムからなる環状体を嵌合する。図10〜12の構
成によれば、補強筒5dに発生する渦電流が軸方向に分
割され、軸方向に並べられた各電磁石12の磁極片15
の対向する補強筒5Cに磁極片15の両側にアルミニウ
ムや銅からなる環状体を嵌合し、効率的な渦電流を発生
させ、制動能力を高める。In the embodiment shown in FIG. 10, a V-groove 31 extending in the circumferential direction is provided at a central portion of the pole piece 15 of the electromagnet 12 in the axial direction.
And a reinforcing cylinder 5d made of a ferromagnetic material such as cast steel.
And a circumferential groove 32 having a rectangular cross section facing the V-groove 31.
And a groove 32 is cast with aluminum or an annular body made of aluminum is fitted. 11 and 12
In the embodiment shown in FIG. 1, a plurality of electromagnets 1 arranged in the axial direction are provided.
A groove 32 having a rectangular cross section is provided on the inner peripheral surface of the reinforcing cylinder 5d, and aluminum is cast into the groove 32, or an annular body made of aluminum is fitted. According to the configuration of FIGS. 10 to 12, the eddy current generated in the reinforcing cylinder 5 d is divided in the axial direction, and the pole pieces 15 of the respective electromagnets 12 arranged in the axial direction.
An annular body made of aluminum or copper is fitted on both sides of the pole piece 15 to the opposing reinforcing cylinder 5C to generate an efficient eddy current and enhance the braking capacity.
【0016】図13に示す本発明の第2実施例では、回
転軸61に結合した磁石支持筒58の内部に、不動の制
動ドラム42を配設したものである。鋳鋼などの強磁性
体からなる磁石支持筒58は、端壁58aを回転軸61
の端部にスプライン嵌合されかつナツト63により締結
される。回転軸61の他端部には歯車68が結合され、
例えば変速機の出力回転軸に結合した歯車と噛み合され
る。磁石支持筒58の内周面には永久磁石56を埋め込
んだ鉄心57が結合され、鉄心57に支持した巻枠54
に電磁コイル53を巻装して電磁石52が構成される。
鉄心57の内周面は磁極片15にて形成される。In the second embodiment of the present invention shown in FIG. 13, an immovable brake drum 42 is disposed inside a magnet support cylinder 58 connected to a rotating shaft 61. A magnet support cylinder 58 made of a ferromagnetic material such as cast steel has a rotating shaft
Are spline-fitted and fastened by nuts 63. A gear 68 is coupled to the other end of the rotating shaft 61,
For example, it meshes with a gear connected to the output rotation shaft of the transmission. An iron core 57 having a permanent magnet 56 embedded therein is connected to the inner peripheral surface of the magnet support cylinder 58, and a winding frame 54 supported by the iron core 57 is provided.
An electromagnet 52 is formed by winding an electromagnetic coil 53 around the electromagnet 52.
The inner peripheral surface of the iron core 57 is formed by the pole piece 15.
【0017】制動ドラム42は両端壁42aを回転軸6
1に軸受67により相対回転可能に支持され、かつ例え
ば歯車変速機の壁部に適当な手段により固定される。制
動ドラム42の磁極片15の内周面に対向する部分に
は、低炭素鋼などの強磁性体で導電性を有する材料(好
ましくは電気抵抗の小さい材料)からなる筒体45が、
制動ドラム42をアルミニウムから鋳造する際に鋳込ま
れる。好ましくは、制動ドラム42の内空部69には、
入口65から冷却水や冷却油を供給し、出口66から排
出される。The braking drum 42 has two end walls 42a,
1 is rotatably supported by bearings 67 and is secured to the wall of a gear transmission by suitable means, for example. A cylindrical body 45 made of a ferromagnetic conductive material (preferably a material with low electric resistance) such as low carbon steel is provided at a portion of the braking drum 42 facing the inner peripheral surface of the pole piece 15.
Cast when the braking drum 42 is cast from aluminum. Preferably, the inner space 69 of the braking drum 42
Cooling water or cooling oil is supplied from an inlet 65 and discharged from an outlet 66.
【0018】なお、本発明は以上の各実施例において、
電磁石を用いないで永久磁石だけにしても渦電流減速装
置として働らき、制動を解除する時は回転軸と歯車変速
機の出力軸との間のクラツチを遮断するなどの公知の適
当な手段を講じる。The present invention relates to each of the above embodiments.
Even if a permanent magnet alone is used without using an electromagnet, it works as an eddy current reduction device. Take.
【0019】[0019]
【発明の効果】本発明では制動ドラムの磁極片と対向す
る周面を構成する筒体に、純鉄、純鉄に近い材料、低炭
素鋼などの電気抵抗の小さい材料を用いているので、磁
界が通りやすく、渦電流の流れが改善され、制動能力が
高められる。According to the present invention, since the cylinder constituting the peripheral surface of the brake drum facing the magnetic pole piece is made of a material having a small electric resistance, such as pure iron, a material close to pure iron, and low carbon steel. The magnetic field is easy to pass, the flow of the eddy current is improved, and the braking ability is enhanced.
【0020】断面溝形をなすアルミニウムなどの本体に
筒体を溶接によるかボルトにより結合して水室が区画さ
れるので、渦電流による熱を効率的に除去できる。Since the water chamber is defined by welding or bolting the cylindrical body to a body made of aluminum or the like having a groove shape in cross section, heat due to eddy current can be efficiently removed.
【0021】筒体の軸方向寸法は電磁石の磁極片の幅と
同寸とし、筒体の両端に電気抵抗の小さいアルミニウム
を予め鋳込んでおくことにより、アルミニウムから鋳造
される断面溝形の本体に筒体を鋳込む時の結合度が高め
られる。The axial dimension of the cylinder is the same as the width of the pole piece of the electromagnet, and aluminum having a low electric resistance is pre-cast at both ends of the cylinder, so that a groove-shaped main body is cast from aluminum. The degree of coupling when casting the cylinder into the cylinder is increased.
【0022】電磁石の鉄心には永久磁石を埋め込むこと
により、電磁コイルの巻数を減じ、消費電力を減じるこ
とができる。By embedding a permanent magnet in the core of the electromagnet, the number of turns of the electromagnetic coil can be reduced, and power consumption can be reduced.
【図1】本発明に係る渦電流減速装置の正面断面図であ
る。FIG. 1 is a front sectional view of an eddy current reduction device according to the present invention.
【図2】同渦電流減速装置の側面断面図である。FIG. 2 is a side sectional view of the eddy current reduction device.
【図3】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 3 is a side sectional view showing a main part of the eddy current reduction device.
【図4】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 4 is a side sectional view showing a main part of the eddy current reduction device.
【図5】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 5 is a side sectional view showing a main part of the eddy current reduction device.
【図6】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 6 is a side sectional view showing a main part of the eddy current reduction device.
【図7】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 7 is a side sectional view showing a main part of the eddy current reduction device.
【図8】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 8 is a side sectional view showing a main part of the eddy current reduction device.
【図9】同渦電流減速装置の要部を示す側面断面図であ
る。FIG. 9 is a side sectional view showing a main part of the eddy current reduction device.
【図10】同渦電流減速装置の要部を示す側面断面図で
ある。FIG. 10 is a side sectional view showing a main part of the eddy current reduction device.
【図11】同渦電流減速装置の要部を示す側面断面図で
ある。FIG. 11 is a side sectional view showing a main part of the eddy current reduction device.
【図12】同渦電流減速装置の要部を示す側面断面図で
ある。FIG. 12 is a side sectional view showing a main part of the eddy current reduction device.
【図13】本発明の第2実施例に係る渦電流減速装置の
側面断面図である。FIG. 13 is a side sectional view of an eddy current reduction device according to a second embodiment of the present invention.
2:制動ドラム 3:本体 3a:端壁 4:水室
5:筒体 5d:補強筒 12:電磁石 13:電磁コイル 14:巻枠 15:
磁極片 16:永久磁石 17:鉄心 18:磁石支持筒 21:回転軸 22:
取付フランジ 25:入口 26:出口 42:制動ド
ラム 42a:端壁 45:筒体 52:電磁石 5
3:電磁コイル 54:巻枠 56:永久磁石 57:
鉄心 58:磁石支持筒 61:回転軸 65:入口
66:出口 67:軸受 68:歯車 69:内空部2: braking drum 3: body 3a: end wall 4: water chamber
5: cylindrical body 5d: reinforcing cylinder 12: electromagnet 13: electromagnetic coil 14: winding frame 15:
Magnetic pole piece 16: Permanent magnet 17: Iron core 18: Magnet support cylinder 21: Rotating shaft 22:
Mounting flange 25: Inlet 26: Outlet 42: Brake drum 42a: End wall 45: Cylindrical body 52: Electromagnet 5
3: electromagnetic coil 54: winding frame 56: permanent magnet 57:
Iron core 58: Magnet support cylinder 61: Rotating shaft 65: Inlet
66: outlet 67: bearing 68: gear 69: inner space
Claims (3)
に、回転軸に結合した磁石支持筒を配設し、該磁石支持
筒の外周面に前記制動ドラムの内周面に対向する磁極片
を有する多数の磁石を周方向等間隔に結合した渦電流減
速装置において、前記制動ドラムは断面溝形の本体に、
前記磁極片に対向する面に強磁性かつ導電性を有する材
料からなる筒体を結合したことを特徴とする渦電流減速
装置。A magnet support cylinder connected to a rotating shaft is disposed inside an immovable braking drum made of an electric conductor, and a magnetic pole piece is provided on an outer peripheral surface of the magnet supporting cylinder and opposed to an inner peripheral surface of the braking drum. In the eddy current reduction device in which a number of magnets having the following are coupled at equal intervals in the circumferential direction, the braking drum is provided in a main body having a groove-shaped cross section,
An eddy current reduction device, wherein a cylindrical body made of a ferromagnetic and conductive material is coupled to a surface facing the pole piece.
る空間に冷却媒体を貫流させることを特徴とする、請求
項1に記載の渦電流減速装置。2. The eddy current reduction device according to claim 1, wherein a cooling medium flows through a space defined by the main body of the braking drum and the cylindrical body.
なることを特徴とする、請求項1,2に記載の渦電流減
速装置。3. The eddy current reduction device according to claim 1, wherein the main body of the braking drum is made of aluminum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000378088A JP2002186245A (en) | 2000-12-12 | 2000-12-12 | Eddy current speed reducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000378088A JP2002186245A (en) | 2000-12-12 | 2000-12-12 | Eddy current speed reducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002186245A true JP2002186245A (en) | 2002-06-28 |
Family
ID=18846717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000378088A Pending JP2002186245A (en) | 2000-12-12 | 2000-12-12 | Eddy current speed reducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2002186245A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011072111A (en) * | 2009-09-25 | 2011-04-07 | Kitashiba Electric Co Ltd | Ac generator |
JP2011088733A (en) * | 2009-10-26 | 2011-05-06 | Ito Denki Kk | Roller with built-in motor and roller |
-
2000
- 2000-12-12 JP JP2000378088A patent/JP2002186245A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011072111A (en) * | 2009-09-25 | 2011-04-07 | Kitashiba Electric Co Ltd | Ac generator |
JP2011088733A (en) * | 2009-10-26 | 2011-05-06 | Ito Denki Kk | Roller with built-in motor and roller |
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