JPH09191634A - Permanent magnet type eddy current reduction gear - Google Patents
Permanent magnet type eddy current reduction gearInfo
- Publication number
- JPH09191634A JPH09191634A JP7353493A JP35349395A JPH09191634A JP H09191634 A JPH09191634 A JP H09191634A JP 7353493 A JP7353493 A JP 7353493A JP 35349395 A JP35349395 A JP 35349395A JP H09191634 A JPH09191634 A JP H09191634A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- eddy current
- guide frame
- support ring
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は車両に減速制動力を
与えるリターダとしての渦電流減速装置、特に強磁性板
(ポールピース)をなくし、小型軽量化と制動能力の増
大を図つた永久磁石式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 speed reducer as a retarder for applying a decelerating braking force to a vehicle, and in particular to a permanent magnet type which eliminates a ferromagnetic plate (pole piece) to reduce the size and weight and increase the braking ability. The present invention relates to an eddy current speed reducer.
【0002】[0002]
【従来の技術】特開平3−86061号公報(第1図)
に示すように、従来の永久磁石式渦電流減速装置では、
磁石支持環が永久磁石(以下、これを単に磁石という)
の保護ケースの一部をなす案内枠の内部に収容され、制
動時、磁石支持環が制動ドラムの内部へ突出し、磁石は
案内枠の強磁性板(ポールピース)を通じて制動ドラム
との間に磁気回路を形成する。回転する制動ドラムが磁
界を横切る時、制動ドラムに渦電流が発生し、制動ドラ
ムの回転方向と逆方向の制動力が発生する。2. Description of the Related Art JP-A-3-86061 (FIG. 1)
As shown in, in the conventional permanent magnet type eddy current speed reducer,
The magnet support ring is a permanent magnet (hereinafter this is simply called a magnet)
The magnet support ring is housed inside a guide frame that forms part of the protective case of the motor, and during braking, the magnet support ring projects into the brake drum, and the magnet is magnetically connected to the brake drum through the ferromagnetic plate (pole piece) of the guide frame. Form a circuit. When the rotating braking drum crosses the magnetic field, an eddy current is generated in the braking drum, and a braking force in the direction opposite to the rotating direction of the braking drum is generated.
【0003】しかし、従来の渦電流減速装置は、磁束が
部厚い強磁性板を通過するので、制動ドラムへ到達する
磁束が減少し、制動力が低下するという問題があり、制
動力の低下は制動ドラムの材料が電気伝導度の大きいも
のほど顕著である。また、従来の渦電流減速装置は、案
内枠に多数の強磁性板を周方向等間隔に結合するもので
あるから、構成が複雑になり、製造経費が嵩み、重量増
加を来す。However, in the conventional eddy current speed reducer, since the magnetic flux passes through the thick ferromagnetic plate, there is a problem that the magnetic flux reaching the braking drum is reduced and the braking force is reduced. The material of the braking drum having a higher electric conductivity is more remarkable. Further, since the conventional eddy current speed reducer is formed by coupling a large number of ferromagnetic plates to the guide frame at equal intervals in the circumferential direction, the structure becomes complicated, the manufacturing cost increases, and the weight increases.
【0004】図9に示すように、上述の渦電流減速装置
は制動ドラム15が矢印y方向へ回転すると、磁束xの
大部分は制動ドラム15の回転方向へ引きずられるが、
磁束の一部は制動ドラム15の内部へ入らないで、隣り
の強磁性板51へ直接入り込んだり、同じ磁石8の異極
へ流れたりする。As shown in FIG. 9, in the eddy current speed reducer described above, when the braking drum 15 rotates in the direction of arrow y, most of the magnetic flux x is dragged in the direction of rotation of the braking drum 15.
A part of the magnetic flux does not enter the inside of the braking drum 15 but directly enters the adjacent ferromagnetic plate 51 or flows to a different pole of the same magnet 8.
【0005】特開平1−234043号公報に開示され
る永久磁石式渦電流減速装置では、案内枠は密閉されて
いないが、磁石の外周面に強磁性板が結合され、磁石の
両側面は露出しているので、異物による損傷や湿気によ
る錆が生じる恐れがある。In the permanent magnet type eddy current speed reducer disclosed in Japanese Patent Laid-Open No. 1-234043, the guide frame is not sealed, but a ferromagnetic plate is coupled to the outer peripheral surface of the magnet and both side surfaces of the magnet are exposed. Therefore, there is a risk of damage due to foreign matter and rust due to moisture.
【0006】[0006]
【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、案内枠の制動ドラムの内周面に対向する筒
部分をなくし、磁石支持環と磁石の少なくとも外周面を
非磁性体からなる薄板により覆い、装置の小型軽量化と
制動能力の増大を図るようにした永久磁石式渦電流減速
装置を提供することにある。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to eliminate the cylindrical portion of the guide frame facing the inner peripheral surface of the braking drum, and to make at least the outer peripheral surface of the magnet support ring and the magnet non-magnetic. It is an object of the present invention to provide a permanent magnet type eddy current reduction device which is covered with a thin plate made of to reduce the size and weight of the device and increase the braking ability.
【0007】[0007]
【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、一
端部が車体側に固定され他端部が制動ドラムの内部へ突
出する筒状の案内枠と、該案内枠に軸方向移動可能に支
持されかつ外周面に多数の永久磁石を周方向等間隔に結
合する磁石支持環とを備えた永久磁石式渦電流減速装置
において、前記案内枠は磁石支持環を外挿する内筒部と
磁性体からなりかつ制動ドラムの内周面と対向しない外
筒部とを備えており、前記永久磁石と磁石支持環は外面
を非磁性体からなる薄板により覆われていることを特徴
とする。In order to solve the above problems, the structure of the present invention has a braking drum connected to a rotating shaft, and one end fixed to the vehicle body side and the other end protruding into the braking drum. In a permanent magnet type eddy current speed reducer comprising a tubular guide frame and a magnet support ring that is axially movably supported by the guide frame and that couples a number of permanent magnets on the outer peripheral surface at equal intervals in the circumferential direction, The guide frame includes an inner cylinder portion for externally inserting the magnet support ring and an outer cylinder portion made of a magnetic material and not facing the inner peripheral surface of the braking drum. The permanent magnet and the magnet support ring have non-magnetic outer surfaces. It is characterized by being covered with a thin plate composed of a body.
【0008】[0008]
【発明の実施の形態】本発明では案内枠の外筒部につい
て、制動ドラムの内周面に対向する筒部分をなくし、磁
石を制動ドラムの内周面へより接近させることにより、
磁石から制動ドラムへ到達する磁束密度を高め、制動能
力の増大を図る。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, in the outer cylinder portion of the guide frame, the cylinder portion facing the inner peripheral surface of the braking drum is eliminated, and the magnet is brought closer to the inner peripheral surface of the braking drum.
The magnetic flux density reaching the braking drum from the magnet is increased to increase the braking ability.
【0009】[0009]
【実施例】図1は本発明に係る渦電流減速装置の要部を
示す正面断面図である。渦電流減速装置は例えば車両用
変速機の出力軸に回転結合される円板状の取付フランジ
19の周縁部から放射状に延びる多数のスポーク16
に、冷却フイン15aを備えた制動ドラム15の右端部
が溶接などにより結合される。制動ドラム15の左端部
は、制動ドラム15の内部の熱が外部へ円滑に放散され
るように円錐面13を形成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front sectional view showing a main part of an eddy current speed reducer according to the present invention. The eddy current reduction device has, for example, a large number of spokes 16 radially extending from a peripheral portion of a disc-shaped mounting flange 19 rotationally coupled to an output shaft of a vehicle transmission.
The right end of the braking drum 15 provided with the cooling fins 15a is joined thereto by welding or the like. The left end of the braking drum 15 is formed with a conical surface 13 so that the heat inside the braking drum 15 can be smoothly dissipated to the outside.
【0010】例えば車両用変速機の壁部に固定支持され
る案内枠6は、制動ドラム15との間に断面長方形の内
空部20を形成するような筒形のものであり、右半部を
制動ドラム15の内部へ突出される。本発明によれば、
案内枠6は端壁6bと、制動ドラム15とほぼ同じ肉厚
の外筒部6aと、内筒部6cとを一体に備えられ、内筒
部6cの右端に環状板からなる端壁6dを結合される。
鉄などの強磁性体からなる外筒部6aは制動ドラム15
の内部へ突出する筒部分がなく、右端部に円錐面13に
対向する円錐面31を形成される。For example, the guide frame 6 fixedly supported by the wall portion of the vehicle transmission has a tubular shape such that an inner space 20 having a rectangular cross section is formed between the guide frame 6 and the braking drum 15. Is projected into the braking drum 15. According to the present invention,
The guide frame 6 is integrally provided with an end wall 6b, an outer cylinder portion 6a having substantially the same thickness as the braking drum 15, and an inner cylinder portion 6c. An end wall 6d made of an annular plate is provided at the right end of the inner cylinder portion 6c. Be combined.
The outer cylinder portion 6a made of a ferromagnetic material such as iron is the braking drum 15
There is no cylindrical portion protruding inward, and a conical surface 31 facing the conical surface 13 is formed at the right end.
【0011】案内枠6の内部には、制動ドラム15とほ
ぼ同じ肉厚の鉄などの強磁性体からなる磁石支持環9が
収容される。磁石支持環9は内筒部6cに軸方向摺動可
能に外挿され、かつ外周面に多数の磁石8を周方向等間
隔に結合される。磁石8は制動ドラム15の内周面に対
向する外周面と、磁石支持環9に結合する内周面とに磁
極を備えており、制動ドラム15の内周面に対向する磁
極の極性が周方向に交互に異なるように配設される。Inside the guide frame 6, a magnet support ring 9 made of a ferromagnetic material such as iron having a thickness substantially the same as that of the braking drum 15 is housed. The magnet support ring 9 is externally inserted into the inner cylindrical portion 6c so as to be slidable in the axial direction, and a large number of magnets 8 are joined to the outer peripheral surface at equal intervals in the circumferential direction. The magnet 8 has magnetic poles on the outer peripheral surface facing the inner peripheral surface of the braking drum 15 and the inner peripheral surface coupled to the magnet support ring 9, and the polarities of the magnetic poles facing the inner peripheral surface of the braking drum 15 are circumferential. They are arranged so as to be alternately different in the direction.
【0012】磁石支持環9を制動ドラム15の内部へ突
出する図1に示す制動位置(図1に示す位置)と、制動
ドラム15から引退し端壁6bに当接する非制動位置と
に移動するために、端壁6bに複数(好ましくは3個)
のアクチユエータAのシリンダ2が結合される。アクチ
ユエータAはシリンダ2にピストン4を嵌挿して室3と
室5を区画され、ピストン4から端壁6bを貫通して案
内枠6の内空部20へ突出するロツド7に磁石支持環9
を結合される。The magnet support ring 9 moves to a braking position shown in FIG. 1 (the position shown in FIG. 1) where it projects into the inside of the braking drum 15 and a non-braking position where it retreats from the braking drum 15 and contacts the end wall 6b. For this purpose, a plurality (preferably three) is provided on the end wall 6b.
Cylinder 2 of actuator A is connected. In the actuator A, a piston 4 is fitted into a cylinder 2 to define a chamber 3 and a chamber 5, and a rod 7 protruding from the piston 4 through an end wall 6b to an inner space 20 of the guide frame 6 has a magnet support ring 9 attached thereto.
Will be combined.
【0013】図2に示すように、磁石8はブロツク状の
ものであり、断面台形をなす止め具22とボルト21に
より磁石支持環9に固定される。このため、ゴム、合成
樹脂、アルミニウムなどの非磁性体からなる止め具22
は、周方向に相隣接する磁石8の間へ挟まれ、かつ複数
のボルト21により磁石支持環9へ締結される。As shown in FIG. 2, the magnet 8 has a block shape and is fixed to the magnet support ring 9 by a stopper 22 having a trapezoidal cross section and a bolt 21. Therefore, the stopper 22 made of a non-magnetic material such as rubber, synthetic resin, or aluminum.
Are sandwiched between magnets 8 which are adjacent to each other in the circumferential direction, and are fastened to the magnet support ring 9 by a plurality of bolts 21.
【0014】本発明によれば、磁石8を制動ドラム15
の内周面へ直接的に接近させるために、外筒部6aの制
動ドラム15の内部へ突出する筒部分をなくし、さらに
磁石8を保護するために、磁石8と磁石支持環9の外面
をオーステナイト系ステンレス、アルミニウム、強化繊
維入り耐熱性合成樹脂、強化繊維入りカーボン材などの
非磁性体からなる薄板32により覆うようにしたもので
ある。具体的には、磁石支持環9と磁石8に、収縮性の
ある薄板32を螺旋状に巻き付けてもよいが、図1に示
す実施例では、薄板32を磁石8と磁石支持環9の断面
を覆うように巻き付け、かつ薄板32の両側縁32aを
互いに重ね合せ、適当な手段により結合する。図2に示
すように、周方向に隣接する磁石8の間では、薄板32
の軸方向に延びる溝部32bを、各磁石8の段部8bと
止め具22とへ重ね合せ、複数のボルト21により磁石
支持環9へ締結する。According to the invention, the magnet 8 is connected to the braking drum 15
In order to directly approach the inner peripheral surface of the magnet, the tubular portion of the outer tubular portion 6a protruding into the braking drum 15 is eliminated, and in order to protect the magnet 8, the outer surfaces of the magnet 8 and the magnet support ring 9 are removed. The thin plate 32 is made of a non-magnetic material such as austenitic stainless steel, aluminum, heat-resistant synthetic resin containing reinforcing fibers, carbon material containing reinforcing fibers, and the like. Specifically, a contractible thin plate 32 may be spirally wound around the magnet support ring 9 and the magnet 8. However, in the embodiment shown in FIG. 1, the thin plate 32 is a cross section of the magnet 8 and the magnet support ring 9. And the side edges 32a of the thin plate 32 are overlapped with each other and joined by an appropriate means. As shown in FIG. 2, a thin plate 32 is provided between the magnets 8 that are adjacent to each other in the circumferential direction.
The groove portion 32b extending in the axial direction is superposed on the stepped portion 8b of each magnet 8 and the stopper 22, and is fastened to the magnet support ring 9 by a plurality of bolts 21.
【0015】次に、本発明による渦電流減速装置の作動
について説明する。制動時、磁石支持環9はアクチユエ
ータAにより磁石8が制動ドラム15の内周面に対向す
る位置へ押動される。この時、磁石8は直接的に制動ド
ラム15へ磁界を及ぼし、図2に示すように制動ドラム
15と磁石支持環9との間に磁気回路xを形成する。回
転する制動ドラム15が磁界を横切る時、制動ドラム1
5の肉部に渦電流が流れ、制動トルクを発生する。Next, the operation of the eddy current speed reducer according to the present invention will be described. During braking, the magnet support ring 9 is pushed by the actuator A to a position where the magnet 8 faces the inner peripheral surface of the braking drum 15. At this time, the magnet 8 directly applies a magnetic field to the braking drum 15 to form a magnetic circuit x between the braking drum 15 and the magnet support ring 9 as shown in FIG. When the rotating braking drum 15 crosses the magnetic field, the braking drum 1
An eddy current flows in the meat portion of 5 and a braking torque is generated.
【0016】制動を解除する時は、アクチユエータAの
室5へ圧力流体を供給し、室3の圧力流体を外部へ放出
すると、ピストン4により磁石支持環9が左方へ端壁6
bに当接するまで引つ張られる。磁石8は制動ドラム1
5の内部から引退し、案内枠6の外筒部6aと磁石支持
環9との間に磁気回路を形成し、制動ドラム15には磁
界を及ぼさない。When the brake is released, the pressure fluid is supplied to the chamber 5 of the actuator A, and the pressure fluid in the chamber 3 is discharged to the outside. Then, the magnet support ring 9 is moved leftward by the piston 4 to the end wall 6
It is pulled until it abuts b. The magnet 8 is the braking drum 1.
5 retreats from the inside, forms a magnetic circuit between the outer cylinder portion 6a of the guide frame 6 and the magnet support ring 9, and does not exert a magnetic field on the braking drum 15.
【0017】本発明によれば、磁石8を保護し磁界を誘
導する強磁性板(ポールピース)をを含む案内枠6の制
動ドラム15の内周面に対向する筒部分を廃止し、磁石
8と磁石支持環9の外面を非磁性体からなる薄板32に
より覆うようにしたから、従来例に比べて磁石8が制動
ドラム15の内周面へ大幅に接近することになり、より
強い磁界が制動ドラム15へ作用するので、強い制動力
が得られる。換言すれば、制動ドラム15の半径を従来
の強磁性板の厚さ分だけ縮小しても十分な制動力が得ら
れ、小型車両への渦電流減速装置の搭載が可能になる。According to the present invention, the cylindrical portion of the guide frame 6 facing the inner peripheral surface of the braking drum 15 including the ferromagnetic plate (pole piece) that protects the magnet 8 and guides the magnetic field is eliminated, and the magnet 8 is eliminated. Since the outer surface of the magnet support ring 9 is covered with the thin plate 32 made of a non-magnetic material, the magnet 8 is much closer to the inner peripheral surface of the braking drum 15 than in the conventional example, and a stronger magnetic field is generated. Since it acts on the braking drum 15, a strong braking force is obtained. In other words, even if the radius of the braking drum 15 is reduced by the thickness of the conventional ferromagnetic plate, a sufficient braking force can be obtained, and the eddy current speed reducer can be mounted on a small vehicle.
【0018】図3に示す実施例では、薄板32として所
定の周方向長さをもつ筒形のものを用い、周方向の端縁
32c,32dを止め具22の上へ重ね合せたうえ、複
数のボルト21により磁石支持環9へ締結するものであ
る。In the embodiment shown in FIG. 3, a thin plate 32 having a cylindrical shape having a predetermined circumferential length is used, and circumferential edges 32c and 32d are superposed on the stopper 22 and a plurality of them are formed. It is fastened to the magnet support ring 9 with the bolt 21.
【0019】図4に示す実施例では、磁石8と磁石支持
環9の全外面を覆うために、薄板34は磁石8の外周面
を覆う断面溝形の分割体34Aと、磁石支持環9の内周
面を覆う断面溝形の分割体34Bとを、両側縁34aで
互いに重ね合せたうえ、溶接によるか接着剤を用いて結
合したものである。In the embodiment shown in FIG. 4, in order to cover the entire outer surfaces of the magnet 8 and the magnet supporting ring 9, the thin plate 34 has a groove-shaped sectional body 34A covering the outer peripheral surface of the magnet 8 and the magnet supporting ring 9. A divided body 34B having a groove cross section covering the inner peripheral surface is superposed on each other at both side edges 34a, and then joined by welding or using an adhesive.
【0020】図5に示すように、磁石8を保護する薄板
36は、磁石支持環9の内周面までを完全に覆わなくて
もよく、薄板36は磁石8の外周面と、磁石8と磁石支
持環9の両側面とを覆い、両側縁36aを折り曲げて磁
石支持環9の内周面へ固定される。図6に示すように、
薄板38により磁石8の外周面と、磁石8と磁石支持環
9の両側面とを覆い、薄板38の両側縁38aをボルト
39により磁石支持環9へ締結してもよい。また、図7
に示すように、薄板38の両側縁38aを磁石支持環9
の側面にロー付けなどにより結合してもよい。As shown in FIG. 5, the thin plate 36 that protects the magnet 8 does not have to completely cover the inner peripheral surface of the magnet support ring 9, and the thin plate 36 does not cover the outer peripheral surface of the magnet 8 and the magnet 8. Both side surfaces of the magnet support ring 9 are covered and both side edges 36 a are bent and fixed to the inner peripheral surface of the magnet support ring 9. As shown in FIG.
The thin plate 38 may cover the outer peripheral surface of the magnet 8 and both side surfaces of the magnet 8 and the magnet support ring 9, and both side edges 38 a of the thin plate 38 may be fastened to the magnet support ring 9 with bolts 39. FIG.
As shown in FIG.
It may be joined to the side surface of the by brazing.
【0021】図8に示す実施例では、制動時の渦電流に
基づく制動ドラム15の発熱による磁石8の性能低下を
抑えるために、磁石8の外周面と薄板36との間に断熱
板8aを介装するしたものであり、これにより制動ドラ
ム15からの熱伝達による磁石8の温度上昇を抑えるこ
とができる。断熱板8aは磁石8の端面と側面まで覆う
ようにしてもよい。In the embodiment shown in FIG. 8, a heat insulating plate 8a is provided between the outer peripheral surface of the magnet 8 and the thin plate 36 in order to suppress deterioration of the performance of the magnet 8 due to heat generation of the braking drum 15 due to eddy current during braking. The temperature rise of the magnet 8 due to heat transfer from the braking drum 15 can be suppressed by this. The heat insulating plate 8a may cover the end surface and the side surface of the magnet 8.
【0022】[0022]
【発明の効果】本発明は上述のように、案内枠に磁石支
持環を外挿する内筒部と、磁性体からなりかつ制動ドラ
ムの内周面と対向しない外筒部とを備え、磁石と磁石支
持環の外面を非磁性体からなる薄板により覆つたもので
あるから、制動ドラムの内周面と磁石との間に分厚い強
磁性板が介在しなくなり、磁石が制動ドラムの内周面へ
大幅に接近することになる。したがつて、磁石が制動ド
ラムに及ぼす磁界が強くなり、より大きな制動力が得ら
れ、案内枠の小型軽量化と製造経費の低減が可能にな
る。As described above, the present invention is provided with the inner cylinder portion for externally inserting the magnet support ring on the guide frame, and the outer cylinder portion made of a magnetic material and not facing the inner peripheral surface of the braking drum. Since the outer surface of the magnet support ring is covered with a thin plate made of a non-magnetic material, a thick ferromagnetic plate does not exist between the inner peripheral surface of the braking drum and the magnet, and the magnet is the inner peripheral surface of the braking drum. Will be much closer to. Therefore, the magnetic field exerted by the magnet on the braking drum is strengthened, a larger braking force is obtained, and it is possible to reduce the size and weight of the guide frame and reduce the manufacturing cost.
【図1】本発明に係る永久磁石式渦電流減速装置の要部
を示す正面断面図である。FIG. 1 is a front sectional view showing a main part of a permanent magnet type eddy current speed reducer according to the present invention.
【図2】図1の線2A−2Aによる永久磁石式渦電流減
速装置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 permanent magnet eddy current speed reducer taken along the line 2A-2A in FIG.
【図3】本発明の一部変更実施例に係る永久磁石式渦電
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 a permanent magnet type eddy current speed reducer according to a partially modified embodiment of the present invention.
【図4】本発明の他の変更実施例に係る磁石支持環の正
面断面図である。FIG. 4 is a front sectional view of a magnet support ring according to another modified embodiment of the present invention.
【図5】本発明の他の変更実施例に係る磁石支持環の正
面断面図である。FIG. 5 is a front sectional view of a magnet support ring according to another modified embodiment of the present invention.
【図6】本発明の他の変更実施例に係る磁石支持環の正
面断面図である。FIG. 6 is a front sectional view of a magnet supporting ring according to another modified embodiment of the present invention.
【図7】本発明の他の変更実施例に係る磁石支持環の正
面断面図である。FIG. 7 is a front sectional view of a magnet support ring according to another modified embodiment of the present invention.
【図8】本発明の他の変更実施例に係る磁石支持環の正
面断面図である。FIG. 8 is a front sectional view of a magnet supporting ring according to another modified embodiment of the present invention.
【図9】従来の永久磁石式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 a conventional permanent magnet type eddy current reduction device.
A:アクチユエータ 2:シリンダ 4:ピストン
6:案内枠 6a:外筒部 6c:内筒部 7:ロツド 8:永久磁石 8a:断熱
板 8b:段部 9:磁石支持環 15:制動ドラム
15a:冷却フイン 16:スポーク 19:取付フラ
ンジ 20:内空部 21:ボルト 22:止め具 3
2,34,36,38:薄板 32a:側縁 32c:
端縁 32d:端縁 34a:側縁 36a:側縁 3
8a:側縁 39:ボルトA: Actuator 2: Cylinder 4: Piston
6: Guide frame 6a: Outer cylinder part 6c: Inner cylinder part 7: Rod 8: Permanent magnet 8a: Heat insulating plate 8b: Step part 9: Magnet support ring 15: Braking drum
15a: Cooling fin 16: Spoke 19: Mounting flange 20: Inner space 21: Bolt 22: Stopper 3
2, 34, 36, 38: Thin plate 32a: Side edge 32c:
Edge 32d: Edge 34a: Side edge 36a: Side edge 3
8a: Side edge 39: Bolt
Claims (2)
車体側に固定され他端部が制動ドラムの内部へ突出する
筒状の案内枠と、該案内枠に軸方向移動可能に支持され
かつ外周面に多数の永久磁石を周方向等間隔に結合する
磁石支持環とを備えた永久磁石式渦電流減速装置におい
て、前記案内枠は磁石支持環を外挿する内筒部と磁性体
からなりかつ制動ドラムの内周面と対向しない外筒部と
を備えており、前記永久磁石と磁石支持環は外面を非磁
性体からなる薄板により覆われていることを特徴とす
る、永久磁石式渦電流減速装置。1. A braking drum connected to a rotating shaft, a tubular guide frame having one end fixed to the vehicle body side and the other end protruding into the braking drum, and supported by the guide frame so as to be movable in the axial direction. In the permanent magnet type eddy current reduction device having a magnet support ring for connecting a large number of permanent magnets to the outer peripheral surface at equal intervals in the circumferential direction, the guide frame includes an inner cylinder portion for externally inserting the magnet support ring and a magnetic body. And a magnet supporting ring, the outer surface of which is covered with a thin plate made of a non-magnetic material. Eddy current reducer.
した、請求項1に記載の永久磁石式渦電流減速装置。2. The permanent magnet type eddy current speed reducer according to claim 1, wherein a thin heat insulating plate is coupled to an outer peripheral surface of the permanent magnet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35349395A JP3444325B2 (en) | 1995-12-28 | 1995-12-28 | Permanent magnet type eddy current reducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35349395A JP3444325B2 (en) | 1995-12-28 | 1995-12-28 | Permanent magnet type eddy current reducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09191634A true JPH09191634A (en) | 1997-07-22 |
JP3444325B2 JP3444325B2 (en) | 2003-09-08 |
Family
ID=18431217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP35349395A Expired - Fee Related JP3444325B2 (en) | 1995-12-28 | 1995-12-28 | Permanent magnet type eddy current reducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3444325B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019078331A (en) * | 2017-10-24 | 2019-05-23 | 新日鐵住金株式会社 | Eddy current-type damper |
WO2023173202A1 (en) * | 2022-03-15 | 2023-09-21 | Safran Landing Systems Canada Inc. | Passive eddy-current wheel brake with conical form |
-
1995
- 1995-12-28 JP JP35349395A patent/JP3444325B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019078331A (en) * | 2017-10-24 | 2019-05-23 | 新日鐵住金株式会社 | Eddy current-type damper |
WO2023173202A1 (en) * | 2022-03-15 | 2023-09-21 | Safran Landing Systems Canada Inc. | Passive eddy-current wheel brake with conical form |
Also Published As
Publication number | Publication date |
---|---|
JP3444325B2 (en) | 2003-09-08 |
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