JP2001327154A - Eddy current reduction gear - Google Patents
Eddy current reduction gearInfo
- Publication number
- JP2001327154A JP2001327154A JP2000144915A JP2000144915A JP2001327154A JP 2001327154 A JP2001327154 A JP 2001327154A JP 2000144915 A JP2000144915 A JP 2000144915A JP 2000144915 A JP2000144915 A JP 2000144915A JP 2001327154 A JP2001327154 A JP 2001327154A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- magnetic
- ferromagnetic
- eddy current
- cylinder
- 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】本発明は案内筒の外筒部の径
方向の寸法を縮小し、磁石支持筒を径外方へ支持するこ
とにより制動力を高めた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 in which a braking force is increased by reducing a radial dimension of an outer cylinder portion of a guide cylinder and supporting a magnet support cylinder in a radially outward direction. .
【0002】[0002]
【従来の技術】例えば米国特許第 5,143,183号明細書な
どに開示される渦電流減速装置では、案内筒の外筒部に
周方向等間隔に配設される多数の強磁性板(ポールピー
ス)が非常に厚いので、磁石(永久磁石、以下同じ)か
ら制動ドラムへ到達する磁界が弱められたり、アルミニ
ウム鋳物からなる案内筒の外筒部へ強磁性板を鋳込むこ
とは亀裂が生じたりして歩留まりが悪く、鋳造後の周面
の機械加工にも手数が掛かる。また、案内筒の外筒部を
磁性体であるフエライトまたはマルテンサイトからなる
厚いステンレス鋼板から構成し、熱処理をして非磁性部
分を形成するものは、ステンレス鋼板が厚いので熱処理
経費が嵩む。さらに、強磁性板が厚いと磁石を着磁する
前に、案内筒の内空部へ磁石支持筒を収容した後に、強
磁性板の外側から磁石となる部分に着磁することはでき
ない。磁石支持筒の磁石に着磁してから案内筒の内空部
へ組み付けることは、磁石支持筒の磁石が案内筒に強い
吸引力を及ぼし、磁石支持筒を案内筒の内空部の所定位
置へ支持するのに手数が掛かる。2. Description of the Related Art In an eddy current reduction device disclosed in, for example, U.S. Pat. No. 5,143,183, a large number of ferromagnetic plates (pole pieces) arranged at equal circumferential intervals on an outer cylinder portion of a guide cylinder are provided. Because it is very thick, the magnetic field reaching the brake drum from a magnet (permanent magnet, the same applies hereinafter) is weakened, and casting a ferromagnetic plate into the outer cylinder of a guide cylinder made of aluminum casting causes cracks. The yield is poor, and it takes time to machine the peripheral surface after casting. In the case where the outer cylindrical portion of the guide cylinder is formed of a thick stainless steel plate made of magnetic material such as ferrite or martensite and is subjected to heat treatment to form a non-magnetic portion, the heat treatment cost is increased because the stainless steel plate is thick. Further, if the ferromagnetic plate is thick, it is impossible to magnetize the magnet portion from the outside of the ferromagnetic plate after accommodating the magnet support tube in the inner space of the guide tube before magnetizing the magnet. Magnetizing the magnet of the magnet support cylinder and assembling it into the inner space of the guide cylinder means that the magnet of the magnet support cylinder exerts a strong attractive force on the guide cylinder, and the magnet support cylinder is moved to a predetermined position in the inner space of the guide cylinder. It takes time to support.
【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、強磁性板を含む案内筒の外筒部をできるだ
け薄くし、磁石支持筒を径外方へ配設することにより制
動力を高めるようにした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-mentioned problems, the object of the present invention is to reduce the thickness of the outer cylinder of a guide cylinder including a ferromagnetic plate as much as possible and to dispose the magnet support cylinder radially outward. It is an object of the present invention to provide an eddy current reduction device with enhanced power.
【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、本発明の構成は回転軸に結合した制動ドラムと、該
制動ドラムの内部にあつて車体などの非回転部分に取り
付けられ断面長方形の内空部を有する非磁性体からなる
案内筒と、該案内筒の内空部に回動可能に支持した少く
とも1つの磁石支持筒と、該磁石支持筒の外周面に周方
向等間隔に結合した多数の磁石とを具備し、前記磁石か
らの磁界に基づく渦電流により前記制動ドラムに制動力
を発生させる渦電流減速装置において、前記磁石を周方
向端部が磁極をなすように配置し、前記磁石と磁石との
間に磁石よりも径外方へ突出する強磁性部材を挟持し、
案内筒の外筒部を強磁性体である薄いステンレス鋼板か
ら構成し、ステンレス鋼板の強磁性部材と対向しない部
分を高温状態から急冷して非磁性または弱磁性のオース
テナイト相にしたことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a brake drum connected to a rotating shaft and a rectangular cross-section inside the brake drum and attached to a non-rotating portion such as a vehicle body. A guide tube made of a non-magnetic material having an inner space portion, at least one magnet support tube rotatably supported by the inner space portion of the guide tube, and circumferentially equally spaced circumferential surfaces of the magnet support tube A plurality of magnets coupled to the eddy current reduction device that generates a braking force on the braking drum by eddy current based on a magnetic field from the magnet, wherein the magnets are arranged such that circumferential ends form magnetic poles. Then, a ferromagnetic member projecting radially outward from the magnet is sandwiched between the magnets,
The outer cylinder part of the guide cylinder is made of a thin stainless steel sheet that is a ferromagnetic material, and the part of the stainless steel sheet that does not face the ferromagnetic member is rapidly cooled from a high temperature state to a nonmagnetic or weakly magnetic austenitic phase. I do.
【0005】[0005]
【発明の実施の形態】本発明では案内筒の外筒部を強磁
性体である薄いステンレス鋼板から構成し、非制動時ス
テンレス鋼板の磁石と対向する部分を高温状態から急冷
してオーステナイト相にし、非磁性または弱磁性部分を
形成する。一方、非磁性体からなる磁石支持筒の外周面
に、多数の磁石を周方向等間隔にかつ磁石の周方向端部
が磁極をなすように結合し、磁石と磁石の間の隙間へ強
磁性部材(または電磁鋼板)を挟み、磁石と強磁性部材
と磁石支持筒とが一体をなす所定厚さの剛性筒体として
構成する。案内筒の外筒部を薄くしたことにより、磁石
支持筒を制動ドラムの内周面へ近づけ、制動力を高め
る。また、案内筒の内空部へ、着磁前の磁石支持筒を収
容支持した後に、外筒部の外側から磁石支持筒の磁石に
着磁できる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the outer cylinder portion of a guide cylinder is made of a thin stainless steel plate which is a ferromagnetic material, and the portion of the stainless steel plate facing the magnet is rapidly cooled from a high temperature state to an austenitic phase when not braking. , Forming a non-magnetic or weak magnetic portion. On the other hand, a large number of magnets are connected to the outer peripheral surface of a magnet support cylinder made of a nonmagnetic material at equal intervals in the circumferential direction so that the circumferential ends of the magnets form magnetic poles. With the member (or the electromagnetic steel plate) interposed, the magnet, the ferromagnetic member, and the magnet support tube are formed as a rigid cylindrical body having a predetermined thickness. By reducing the thickness of the outer cylinder of the guide cylinder, the magnet support cylinder is brought closer to the inner peripheral surface of the braking drum, and the braking force is increased. Further, after the magnet support cylinder before magnetization is accommodated and supported in the inner space of the guide cylinder, the magnet of the magnet support cylinder can be magnetized from outside the outer cylinder part.
【0006】[0006]
【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、例えば車両用変速機の出力回転軸2にスプ
ライン嵌合した取付フランジ3に、制動ドラム8のボス
部5のフランジ5aと、駐車ブレーキの制動ドラム4の
端壁とを一緒に複数のボルト6とナツトにより締結され
る。ボス部5から径外方へ突出する多数の支持腕7の先
端に、多数の冷却フイン9を外周面に備える制動ドラム
8の基端部ないし右端部が溶接などにより結合される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, an eddy current reduction device according to the present invention has a boss portion 5 of a braking drum 8 attached to a mounting flange 3 which is spline-fitted to, for example, an output rotary shaft 2 of a vehicle transmission. The flange 5a and the end wall of the brake drum 4 of the parking brake are fastened together by a plurality of bolts 6 and nuts. A base end or a right end of a brake drum 8 provided with a large number of cooling fins 9 on its outer peripheral surface is joined to a distal end of a large number of support arms 7 projecting radially outward from the boss portion 5 by welding or the like.
【0007】制動ドラム8の内周面の強磁性部分(ポー
ルピース)41aと対向しない両端部と制動ドラム8の
端壁面とには、銅などの良伝導体からなる環状体51,
52が結合される。各環状板51,52は制動ドラム8
に発生する渦電流に軸方向の広がりをもたせ、制動トル
クを増大させる。[0007] At both ends of the inner peripheral surface of the braking drum 8 that do not face the ferromagnetic portion (pole piece) 41a and at the end wall surface of the braking drum 8, an annular body 51 made of a good conductor such as copper is provided.
52 are combined. Each of the annular plates 51 and 52 is
In this case, the eddy current generated in the motor is extended in the axial direction to increase the braking torque.
【0008】制動ドラム8の内部には断面長方形の内空
部を有する案内筒21が配設され、案内筒21はアルミ
ニウムなどの非磁性体からなる両端壁24と、非磁性体
からなる内筒部22と、薄いステンレス鋼板からなる外
筒部41とから、断面長方形の内空部を形成される。外
筒部41には部分的熱処理により周方向等間隔にかつ周
方向交互に強磁性部分41aと非磁性または弱磁性部分
41bとが形成される。具体的には、マルテンサイト系
やフエライト系のステンレス鋼板からなる外筒部41の
強磁性部分41aはそのまま残し、非磁性または弱磁性
部分41bとなる部分だけを局部的に加熱し、高温(8
00〜1350℃)状態から急冷して非磁性または弱磁
性のオーステナイト相にする。A guide cylinder 21 having an inner space with a rectangular cross section is disposed inside the braking drum 8, and the guide cylinder 21 has both end walls 24 made of a non-magnetic material such as aluminum and an inner cylinder made of a non-magnetic material. An inner space having a rectangular cross section is formed by the portion 22 and the outer cylindrical portion 41 made of a thin stainless steel plate. A ferromagnetic portion 41a and a nonmagnetic or weak magnetic portion 41b are formed in the outer cylinder portion 41 at equal intervals in the circumferential direction and alternately in the circumferential direction by partial heat treatment. Specifically, the ferromagnetic portion 41a of the outer cylindrical portion 41 made of a martensitic or ferritic stainless steel plate is left as it is, and only the non-magnetic or weakly magnetic portion 41b is locally heated to a high temperature (8
(From 0 to 1350 ° C.) and rapidly cooled to a nonmagnetic or weakly magnetic austenitic phase.
【0009】案内筒21の内空部には非磁性体からなる
可動の磁石支持筒25と不動の磁石支持筒65とが軸方
向に並設され、両者の間には軸受金属からなるスラスト
ワツシヤ18が介装される。可動の磁石支持筒25は軸
受10により内筒部22に正逆回動可能に支持され、磁
石支持筒65はピン19により内筒部22に固定され
る。A movable magnet support tube 25 made of a non-magnetic material and an immovable magnet support tube 65 are arranged in the inner space of the guide tube 21 in the axial direction, and a thrust washer 18 made of a bearing metal is interposed therebetween. Is interposed. The movable magnet support tube 25 is supported by the inner cylinder portion 22 by the bearing 10 so as to be capable of rotating forward and backward, and the magnet support tube 65 is fixed to the inner cylinder portion 22 by the pin 19.
【0010】図2に示すように、各ブロツク状の磁石5
5は周方向の端面が磁極となるように磁石支持筒65の
外周面に結合される。周方向に隣接する磁石55の間に
はブロツク状の強磁性部材56が挟まれ、径方向のボル
ト(図示せず)により磁石支持筒65の外周面に結合さ
れる。強磁性部材56は磁石55よりも径外方へ突出さ
れ、磁石55が脱落しないように、外端側の周方向の端
面から突出する抜止め突起56aが磁石55の外端面へ
係合される。こうして、磁石支持筒65と磁石55と強
磁性部材56とは所定の軸方向寸法を有し、強磁性部材
56の外周面が円弧面をなす筒体として一体に構成され
る。磁石15と強磁性部材16も同様に磁石支持筒25
に結合される。図1,2に示す実施例では、強磁性部材
16,56の周方向寸法が磁石15,55よりも長くな
つているが、図3,4に示すように、強磁性部材16,
56の周方向寸法は磁石15,55のそれと等しくても
よい。[0010] As shown in FIG.
Numeral 5 is coupled to the outer peripheral surface of the magnet support cylinder 65 such that the circumferential end surface becomes a magnetic pole. A block-like ferromagnetic member 56 is sandwiched between the magnets 55 adjacent in the circumferential direction, and is connected to the outer peripheral surface of the magnet support cylinder 65 by radial bolts (not shown). The ferromagnetic member 56 is projected radially outward from the magnet 55, and a retaining projection 56 a projecting from the circumferential end face on the outer end side is engaged with the outer end face of the magnet 55 so that the magnet 55 does not fall off. . Thus, the magnet support cylinder 65, the magnet 55, and the ferromagnetic member 56 have a predetermined axial dimension, and are integrally formed as a cylinder in which the outer peripheral surface of the ferromagnetic member 56 forms an arc surface. Similarly, the magnet 15 and the ferromagnetic member 16
Is combined with In the embodiment shown in FIGS. 1 and 2, the circumferential dimension of the ferromagnetic members 16 and 56 is longer than the magnets 15 and 55, but as shown in FIGS.
The circumferential dimension of 56 may be equal to that of magnets 15,55.
【0011】図1に示すように、可動の磁石支持筒25
を正逆回動するための流体圧アクチユエータ31は、端
壁24と一体に形成したシリンダ32にピストン33を
嵌挿して両端室を区画し、ピストン33に結合したロツ
ドの外端を、磁石支持筒25から端壁24のスリツト3
5を経て外部へ突出する腕34に連結される。As shown in FIG. 1, a movable magnet support cylinder 25
A fluid pressure actuator 31 for forward and reverse rotation of a piston is inserted into a cylinder 32 formed integrally with the end wall 24 to divide the both end chambers, and the outer end of a rod connected to the piston 33 is supported by a magnet. Slit 3 from tube 25 to end wall 24
5 and connected to an arm 34 protruding to the outside.
【0012】上述の渦電流減速装置において、非制動
時、外筒部41の強磁性部分41aに対する、軸方向に
並ぶ磁石支持筒25の磁石15と磁石支持筒65の磁石
55との極性が互いに逆の状態にあり、図1,3,4に
示すように、強磁性部分41aと磁石15,55との間
に短絡的磁気回路wが生じる。磁石15,55の磁界は
制動ドラム8に及ばないので、制動ドラム8に制動トル
クは発生しない。制動時、流体圧アクチユエータ31に
より磁石支持筒25を磁石15の配列ピツチだけ回動す
ると、図2に示すように、強磁性部分41aに対する、
各磁石支持筒25,65の磁石15,55の極性が同じ
になる。したがつて、回転する制動ドラム8が磁石1
5,55からの磁界を横切る時、制動ドラム8に渦電流
に基づく制動トルクが発生する。この時、図2に示すよ
うに、制動ドラム8と磁石支持筒25,65との間に磁
気回路zが生じる。In the eddy current reduction device described above, when the brake is not applied, the polarities of the magnets 15 of the magnet support cylinder 25 and the magnets 55 of the magnet support cylinder 65 arranged in the axial direction with respect to the ferromagnetic portion 41a of the outer cylinder 41 are mutually opposite. In the opposite state, a short-circuit magnetic circuit w is generated between the ferromagnetic portion 41a and the magnets 15 and 55 as shown in FIGS. Since the magnetic fields of the magnets 15 and 55 do not reach the braking drum 8, no braking torque is generated on the braking drum 8. At the time of braking, when the magnet support cylinder 25 is rotated by the arrangement pitch of the magnets 15 by the fluid pressure actuator 31, as shown in FIG.
The polarities of the magnets 15 and 55 of the magnet support cylinders 25 and 65 become the same. Therefore, the rotating braking drum 8 is
When crossing the magnetic field from 5, 55, a braking torque is generated in the braking drum 8 based on the eddy current. At this time, as shown in FIG. 2, a magnetic circuit z is generated between the braking drum 8 and the magnet support cylinders 25 and 65.
【0013】図5に示す実施例では、各磁石支持筒2
5,65の外周面に結合した磁石15,55と磁石1
5,55との間に強磁性部材16,56をそれぞれ挾
み、各強磁性部材16,56の外面に溝39を切つて側
面断面が溝型(チヤンネル型)にされる。各磁石15,
55は周方向の端面が磁極とされ、磁石15,55の周
方向の端面を挟む強磁性部材16,56の端部外面だけ
が、磁石15,55よりも径外方へ突出される。案内筒
21の外筒部41には部分的熱処理により、制動時各強
磁性部材16,56の端部外面に対向する磁性部分41
aと、各強磁性部材16,56の端部外面に対向しない
非磁性または弱磁性部分41bとが形成される。具体的
には、マルテンサイト系やフエライト系のステンレス鋼
板からなる外筒部41の強磁性部分41aはそのまま残
し、非磁性または弱磁性部分41bとなる部分だけを局
部的に加熱し、高温(800〜1350℃)状態から急
冷して非磁性または弱磁性のオーステナイト相にする。
他の構成は図1,2に示すものと同様であり、同様の作
用効果を奏する。In the embodiment shown in FIG.
Magnets 15 and 55 coupled to outer peripheral surfaces of 5, 65 and magnet 1
The ferromagnetic members 16 and 56 are sandwiched between the ferromagnetic members 5 and 55, respectively, and a groove 39 is formed in the outer surface of each of the ferromagnetic members 16 and 56 to form a groove-type (channel-type) side section. Each magnet 15,
55 has a magnetic pole at the circumferential end face, and only outer end faces of the ferromagnetic members 16, 56 sandwiching the circumferential end faces of the magnets 15, 55 project radially outward from the magnets 15, 55. The outer cylindrical portion 41 of the guide cylinder 21 is partially heat-treated so that the magnetic portion 41 facing the outer surface of the end of each of the ferromagnetic members 16 and 56 during braking is provided.
a and a nonmagnetic or weak magnetic portion 41b which does not face the outer surface of the end of each of the ferromagnetic members 16, 56 is formed. Specifically, the ferromagnetic portion 41a of the outer cylindrical portion 41 made of a martensitic or ferritic stainless steel plate is left as it is, and only the nonmagnetic or weakly magnetic portion 41b is locally heated to a high temperature (800 ° C). (1350 ° C.) and rapidly cooled to a nonmagnetic or weakly magnetic austenitic phase.
Other configurations are the same as those shown in FIGS. 1 and 2, and have similar functions and effects.
【0014】[0014]
【発明の効果】本発明は上述のように、回転軸に結合し
た制動ドラムと、該制動ドラムの内部にあつて車体など
の非回転部分に取り付けられ断面長方形の内空部を有す
る非磁性体からなる案内筒と、該案内筒の内空部に回動
可能に支持した少くとも1つの磁石支持筒と、該磁石支
持筒の外周面に周方向等間隔に結合した多数の磁石とを
具備し、前記磁石からの磁界に基づく渦電流により前記
制動ドラムに制動力を発生させる渦電流減速装置におい
て、前記磁石を周方向端部が磁極をなすように配置し、
前記磁石と磁石との間に磁石よりも径外方へ突出する強
磁性部材を挟持し、案内筒の外筒部を強磁性体である薄
いステンレス鋼板から構成し、ステンレス鋼板の強磁性
部材と対向しない部分を高温状態から急冷して非磁性ま
たは弱磁性のオーステナイト相にしたので、案内筒の外
筒部が薄く、それだけ磁石支持筒を径外方へ配設するこ
とにより制動力を高めることができる。As described above, the present invention provides a brake drum connected to a rotating shaft, and a non-magnetic material having a rectangular cross-section inside the brake drum and attached to a non-rotating portion such as a vehicle body. A guide cylinder comprising at least one magnet support cylinder rotatably supported in the inner space of the guide cylinder, and a number of magnets connected to the outer peripheral surface of the magnet support cylinder at equal intervals in the circumferential direction. And in an eddy current reduction device that generates a braking force on the braking drum by eddy current based on a magnetic field from the magnet, the magnet is disposed such that a circumferential end forms a magnetic pole,
A ferromagnetic member projecting radially outward from the magnet is sandwiched between the magnets and the magnet, and the outer cylinder portion of the guide cylinder is formed of a thin stainless steel plate that is a ferromagnetic material. The non-opposed parts are rapidly cooled from a high temperature state to a non-magnetic or weak magnetic austenitic phase, so the outer cylinder part of the guide cylinder is thin, and the braking force is increased by arranging the magnet support cylinder radially outward. Can be.
【0015】案内筒の加工が簡単になり、強磁性板をア
ルミニウムなどの外筒部へ鋳込む従来例のものに比べて
歩留りが良く、加工経費を節減でき、軽量化にも役立
つ。Processing of the guide tube is simplified, the yield is better, the processing cost can be reduced, and the weight can be reduced as compared with a conventional example in which a ferromagnetic plate is cast into an outer tube made of aluminum or the like.
【図1】本発明に係る渦電流減速装置の非制動時の正面
断面図である。FIG. 1 is a front sectional view of an eddy current reduction device according to the present invention when braking is not performed.
【図2】同渦電流減速装置の制動時の要部を示す側面断
面図である。FIG. 2 is a side sectional view showing a main part of the eddy current reduction device during braking.
【図3】本発明の部分的変更実施例に係る渦電流減速装
置の非制動時の磁石支持筒を周方向に展開して示す平面
断面図である。FIG. 3 is a plan sectional view showing a magnet support cylinder in a non-braking state of a eddy current reduction device according to a partially modified embodiment of the present invention, which is developed in a circumferential direction.
【図4】同渦電流減速装置の磁石支持筒を周方向に展開
して示す側面断面図である。FIG. 4 is a side sectional view showing a magnet support cylinder of the eddy current reduction device developed in a circumferential direction.
【図5】本発明の部分的変更実施例に係る渦電流減速装
置の制動時の側面断面図である。FIG. 5 is a side sectional view of an eddy current reduction device according to a partially modified embodiment of the present invention during braking.
2:回転軸 5:ボス部 7:支持腕 8:制動ドラム
15,55:磁石 16,56:強磁性部材 21:
案内筒 22:内筒部 24:端壁 25,65:磁石
支持筒 31:アクチユエータ 41外筒部 41a:
強磁性部分 41b:非磁性または弱磁性部分2: Rotary shaft 5: Boss 7: Support arm 8: Brake drum 15, 55: Magnet 16, 56: Ferromagnetic member 21:
Guide tube 22: Inner tube portion 24: End wall 25, 65: Magnet support tube 31: Actuator 41 Outer tube portion 41a:
Ferromagnetic part 41b: Non-magnetic or weak magnetic part
Claims (2)
ラムの内部にあつて車体などの非回転部分に取り付けら
れ断面長方形の内空部を有する非磁性体からなる案内筒
と、該案内筒の内空部に回動可能に支持した少くとも1
つの磁石支持筒と、該磁石支持筒の外周面に周方向等間
隔に結合した多数の磁石とを具備し、前記磁石からの磁
界に基づく渦電流により前記制動ドラムに制動力を発生
させる渦電流減速装置において、前記磁石を周方向端部
が磁極をなすように配置し、前記磁石と磁石との間に磁
石よりも径外方へ突出する強磁性部材を挟持し、案内筒
の外筒部を強磁性体である薄いステンレス鋼板から構成
し、ステンレス鋼板の強磁性部材と対向しない部分を高
温状態から急冷して非磁性または弱磁性のオーステナイ
ト相にしたことを特徴とする渦電流減速装置。1. A guide cylinder made of a non-magnetic material having a rectangular cross section and being mounted on a non-rotating part such as a vehicle body inside the brake drum and connected to a rotating shaft, At least one pivotally supported in the inner space of the cylinder
An eddy current for generating a braking force on the braking drum by an eddy current based on a magnetic field from the magnet, comprising: a plurality of magnet support cylinders; and a number of magnets coupled to an outer peripheral surface of the magnet support cylinder at equal circumferential intervals. In the reduction gear transmission, the magnet is disposed so that its circumferential end forms a magnetic pole, a ferromagnetic member projecting radially outward from the magnet is sandwiched between the magnet and the magnet, and an outer cylindrical portion of the guide cylinder is provided. An eddy current reduction device characterized by comprising a thin stainless steel plate which is a ferromagnetic material, and rapidly cooling a portion of the stainless steel plate not facing the ferromagnetic member from a high temperature state to a non-magnetic or weakly magnetic austenitic phase.
フエライト系の薄いステンレス鋼板から構成し、外筒部
の強磁性部分はそのまま残し、非磁性または弱磁性部分
となる部分だけを温度800〜1350℃の状態から急
冷して非磁性または弱磁性のオーステナイト相にした、
請求項1に記載の渦電流減速装置。2. The outer cylindrical portion of the guide tube is made of a thin stainless steel plate of martensite or ferrite, and the ferromagnetic portion of the outer tube portion is left as it is, and only the non-magnetic or weakly magnetic portion is heated. Rapidly cooled from 800 to 1350 ° C. to a non-magnetic or weakly magnetic austenitic phase,
The eddy current reduction device according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000144915A JP2001327154A (en) | 2000-05-17 | 2000-05-17 | Eddy current reduction gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000144915A JP2001327154A (en) | 2000-05-17 | 2000-05-17 | Eddy current reduction gear |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001327154A true JP2001327154A (en) | 2001-11-22 |
Family
ID=18651498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000144915A Pending JP2001327154A (en) | 2000-05-17 | 2000-05-17 | Eddy current reduction gear |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001327154A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6948597B2 (en) | 2002-05-28 | 2005-09-27 | Isuzu Motors Limited | Eddy current deceleration device |
EP2330724A1 (en) | 2009-12-02 | 2011-06-08 | Ringfeder Power-Transmission GmbH | Permanent magnetic coupling |
-
2000
- 2000-05-17 JP JP2000144915A patent/JP2001327154A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6948597B2 (en) | 2002-05-28 | 2005-09-27 | Isuzu Motors Limited | Eddy current deceleration device |
US7057321B2 (en) | 2002-05-28 | 2006-06-06 | Isuzu Motors Limited | Eddy current deceleration device |
EP2330724A1 (en) | 2009-12-02 | 2011-06-08 | Ringfeder Power-Transmission GmbH | Permanent magnetic coupling |
WO2011067344A1 (en) | 2009-12-02 | 2011-06-09 | Ringfeder Power-Transmission Gmbh | Permanent magnet coupling |
CN102714454A (en) * | 2009-12-02 | 2012-10-03 | 弹簧圈动力传输有限公司 | Permanent magnet coupling |
JP2013513077A (en) * | 2009-12-02 | 2013-04-18 | リングフェーダー・パワー−トランスミッション・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Permanent magnet coupling device |
CN102714454B (en) * | 2009-12-02 | 2014-11-26 | 弹簧圈动力传输有限公司 | Permanent magnet coupling |
US9059627B2 (en) | 2009-12-02 | 2015-06-16 | Ringfeder Power-Transmission Gmbh | Permanent magnet coupling |
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