JP2709821B2 - Eddy current type reduction gear - Google Patents
Eddy current type reduction gearInfo
- Publication number
- JP2709821B2 JP2709821B2 JP63061631A JP6163188A JP2709821B2 JP 2709821 B2 JP2709821 B2 JP 2709821B2 JP 63061631 A JP63061631 A JP 63061631A JP 6163188 A JP6163188 A JP 6163188A JP 2709821 B2 JP2709821 B2 JP 2709821B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- eddy current
- current type
- reduction gear
- permanent magnets
- 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
Links
Landscapes
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、バスやトラックなど大型自動車に使用さ
れる渦電流式減速装置の改良に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an eddy current type reduction gear used for a large vehicle such as a bus or a truck.
従来の技術 大型自動車の減速装置ないし制動装置としては、主ブ
レーキであるフートブレーキ、補助ブレーキである排気
ブレーキのほか、長い坂道の降坂時などで安定した減速
を行い、かつフートブレーキの焼損を防止するため渦電
流式減速装置が使用されている。2. Description of the Related Art In addition to the foot brake as the main brake and the exhaust brake as the auxiliary brake, the deceleration or braking device for heavy-duty vehicles performs stable deceleration when descending on a long hill, etc. To prevent this, an eddy current type speed reducer is used.
この渦電流式減速装置は、鉄心に電磁コイルを巻着し
た電磁石を磁極として、その磁極の多数をディスクの両
面に配設してなり、バッテリ電源からの通電により磁界
を発生させ、渦電流現像によりディスクを減速させる方
向にトルクを発生させ制動力を得るものである(特開昭
50−61574号公報)。This eddy current type speed reducer has an electromagnet in which an electromagnetic coil is wound around an iron core as a magnetic pole, and a large number of the magnetic poles are arranged on both sides of a disk. A torque is generated in the direction of decelerating the disk to obtain a braking force (Japanese Patent Application Laid-Open No.
50-61574).
発明が解決しようとする課題 従来の渦電流式減速装置は、鉄心に電磁コイルを巻着
した電磁石を磁極として使用するため、重量が重たく、
かつ外形寸法も大きいので、空間の限定された車両搭載
は不利である。また、制動ON時は通常通電しておく必要
があり、バッテリの電力消耗が激しいためバッテリ容量
の増大及び発電機能力の増強が必要となる。Problems to be Solved by the Invention Since the conventional eddy current type speed reducer uses an electromagnet in which an electromagnetic coil is wound around an iron core as a magnetic pole, the weight is heavy,
Moreover, since the external dimensions are large, it is disadvantageous to mount the vehicle in a limited space. In addition, when braking is ON, it is normally necessary to supply power, and the power consumption of the battery is severe, so that it is necessary to increase the battery capacity and the power generation function.
この発明は、かかる問題点を排除することを目的に、
制動時の通電が短時間ですむ渦電流式減速装置を提供す
ることを目的とする。The present invention aims to eliminate such problems,
It is an object of the present invention to provide an eddy current type speed reducer that requires only a short period of time for braking.
課題を解決するための手段 上記目的を達成するために、渦電流式減速装置におい
て、回転軸の片側端部にローターを嵌着し、該ローター
から切り離した円筒部を有する磁気シールドケーシング
をローターに隣接して固定配置し、隣接する磁石の極性
が互いに逆向きとなるようにして複数個の永久磁石を周
設した支持リングを、上記回転軸の軸線方向に永久磁石
の極面が所要空隙でローターに全面対向する位置から全
面離脱する磁気シールドケーシング位置までの長さを進
退自在に設けることにある。Means for Solving the Problems To achieve the above object, in an eddy current type reduction gear transmission, a rotor is fitted to one end of a rotating shaft, and a magnetic shield casing having a cylindrical portion separated from the rotor is attached to the rotor. A support ring in which a plurality of permanent magnets are provided so as to be adjacently fixed and arranged so that the polarities of the adjacent magnets are opposite to each other, and the pole faces of the permanent magnets in the axial direction of the rotation shaft are provided with a required gap. An object of the present invention is to provide a length from a position entirely opposed to the rotor to a position of a magnetic shield casing detached entirely from the rotor so as to be movable forward and backward.
なお、上記永久磁石は希土類コバルト系磁石、希土類
・鉄・硼素系磁石などの磁気特性の優れた希土類磁石を
使用することが望ましい。It is desirable to use a rare earth magnet having excellent magnetic properties, such as a rare earth cobalt magnet or a rare earth / iron / boron magnet, as the permanent magnet.
作用 上記のごとく構成された減速装置の永久磁石を周設し
た支持リングを移動して、永久磁石をローターに全面対
向させると、隣接する永久磁石間ごとに構成される磁気
回路によりローターには渦電流が流れ、大きな制動トル
クが発生する。Action When the support ring surrounding the permanent magnets of the speed reducer constructed as described above is moved to make the permanent magnets face the rotor entirely, a vortex is generated in the rotor by a magnetic circuit configured between adjacent permanent magnets. Electric current flows and a large braking torque is generated.
そして、上記のローターに全面対向した永久磁石を次
第に後退させれば発生する制動トルクは次第に小さくな
り制動力が減少し、永久磁石が後退し終ってローターか
ら全面離脱すれば制動は解除される。If the permanent magnet facing the rotor is gradually retracted, the generated braking torque is gradually reduced, and the braking force is reduced. If the permanent magnet is completely retracted and completely separated from the rotor, braking is released.
実 施 例 この発明の実施例を図面に基いて説明する。Embodiment An embodiment of the present invention will be described with reference to the drawings.
第1図、第2図に示すように、回転軸(1)の片側端
部にコ形断面で外周面に冷却フィン(2)を有するロー
ター(3)を嵌着し、また回転軸(1)に軸支した軸受
箱筒(4)に放射状配置で軸線方向に伸びた支持部材
(5)の複数(図面には3個の場合を示す)を突設し、
その支持部材(5)の頂面にそれぞれガイドレール
(6)を取着する。ローター(3)の円筒部に対応する
筒長さの支持リング(7)の内周面に上記ガイドレール
(6)に跨架するスライド鞍(8)を設け、支持リング
(7)がガイドレール(6)上を移動してローター
(3)に対し進退できるように設ける。そして、支持リ
ング(7)の外周面にはポールピース(9)を貼着した
希土類磁石からなる永久磁石(10)の複数個(図面には
12個(偶数個)の場合を示す)を隣接する磁石の磁極が
互いに逆向きとなるようにして周設する。As shown in FIGS. 1 and 2, a rotor (3) having a U-shaped cross section and having cooling fins (2) on its outer peripheral surface is fitted to one end of the rotating shaft (1). ), A plurality (three in the drawing) of support members (5) projecting radially and axially extending from the bearing housing (4) supported by
Guide rails (6) are attached to the top surfaces of the support members (5). A slide saddle (8) is provided on the inner peripheral surface of a support ring (7) having a cylinder length corresponding to the cylindrical portion of the rotor (3) so as to extend over the guide rail (6). (6) It is provided so that it can move up and down with respect to the rotor (3). On the outer peripheral surface of the support ring (7), a plurality of permanent magnets (10) made of a rare earth magnet with a pole piece (9) adhered thereto (in the drawing,
Twelve (even number) cases are provided so that the magnetic poles of adjacent magnets are opposite to each other.
上記ローター(3)の円筒部の延長線上に同内径の円
筒(11)を、ローター(3)とは切り離して軸受箱筒
(4)の端面に取着した蓋板(12)に持設し、円筒(1
1)と蓋板(12)で磁気シールドケーシングを形成し、
装置外へ磁気が漏洩しないように構成する。On the extension of the cylindrical portion of the rotor (3), a cylinder (11) having the same inner diameter is provided on a lid plate (12) attached to the end face of the bearing housing (4) separately from the rotor (3). , Cylindrical (1
1) and cover plate (12) form a magnetic shield casing,
It is configured so that magnetism does not leak out of the device.
また、ローター(3)とケーシングを構成する円筒
(11)とを共に磁束を通しやすい材質(例えばFeなど)
から構成することにより永久磁石(10)の進退を円滑に
行うことができる。ケーシングの構成は実施例に示すも
のだけに限らず、磁気シールド効果を有し永久磁石(1
0)の進退をさまたげない構成であれば任意に選定でき
る。そして、上記支持リング(7)の内周面に設けた3
つのスライド鞍(8)の各中間点にナット(13)を突設
し、このナットに螺合するねじ棒(14)の一端を上記蓋
板(12)に取着した軸受(15)に軸支する。上記ねじ棒
(14)の軸支端部寄りには歯車(16)が設けられ、軸受
箱筒(4)に軸受(17)により軸支された大径の中間歯
車(18)と噛合する。さらに中間歯車(18)は蓋板(1
2)に取着したモータ(19)の主軸に設けた駆動歯車(2
0)(第4図参照)と噛合する。In addition, the rotor (3) and the cylinder (11) forming the casing are both made of a material (for example, Fe, etc.) that easily transmits magnetic flux.
, The permanent magnet (10) can smoothly move forward and backward. The configuration of the casing is not limited to the one shown in the embodiment, but has a magnetic shielding effect and a permanent magnet (1
Any configuration can be arbitrarily selected as long as the configuration does not hinder advance / retreat of 0). And, 3 provided on the inner peripheral surface of the support ring (7)
A nut (13) protrudes from each intermediate point of the two slide saddles (8), and one end of a screw rod (14) screwed to this nut is connected to a bearing (15) attached to the cover plate (12). Support. A gear (16) is provided near the shaft support end of the screw rod (14), and meshes with a large-diameter intermediate gear (18) that is supported by a bearing (17) in a bearing housing (4). In addition, the intermediate gear (18) is
Drive gear (2) provided on the main shaft of motor (19) attached to 2)
0) (see FIG. 4).
上記減速装置は円筒(11)に設けた取付け金具(21)
を車体へ取着し、回転軸(1)の両端を十字継手を介し
てプロペラシャフトの中間に接続する。The speed reducer is a mounting bracket (21) provided on the cylinder (11).
Is attached to the vehicle body, and both ends of the rotating shaft (1) are connected to the middle of the propeller shaft via a cross joint.
この減速装置は第3図に示すように、支持リング
(7)が後退して永久磁石群がローター(3)から離脱
した位置にあるときは、ローター(3)内に渦電流は流
れないため、ローター(3)は所定のトルクで回転して
おり、いわゆるブレーキOFFの状態にある。As shown in FIG. 3, when the support ring (7) is retracted and the group of permanent magnets is separated from the rotor (3), no eddy current flows in the rotor (3). The rotor (3) is rotating with a predetermined torque and is in a so-called brake OFF state.
このブレーキOFFの状態でモータ(19)を始動すれ
ば、駆動歯車(20)、中間歯車(18)及び歯車(16)を
経てねじ棒(14)が回転し、ナット(13)を介して支持
リング(7)はロータ(3)側へ前進し、ついにはロー
ター(3)の円筒内面に所定空隙を介してポールピース
(9)の全面が対向する。このとき最大の制動トルクが
得られ、車両は大きく減速する。When the motor (19) is started with the brake off, the screw rod (14) rotates via the drive gear (20), the intermediate gear (18) and the gear (16) and is supported via the nut (13). The ring (7) advances toward the rotor (3), and finally the entire surface of the pole piece (9) faces the cylindrical inner surface of the rotor (3) via a predetermined gap. At this time, the maximum braking torque is obtained, and the vehicle is greatly decelerated.
この最大の制動トルクが得られる状態からモータ(1
9)を先とは逆向きに回転させ、支持リング(7)すな
わち永久磁石群を後退させると、ローターと永久磁石と
の対向面積が減少するに従って制動トルクは減少し、再
び第3図のブレーキOFFの状態にもどる。The motor (1
When the support ring (7), that is, the group of permanent magnets is retreated, the braking torque is reduced as the facing area between the rotor and the permanent magnet is reduced, and the brake shown in FIG. Return to the OFF state.
したがって、制動力が少なくてよい場合には、永久磁
石とローターとの対向面積が全体対応と全面離脱の中間
位置にあるように磁石の進退を加減すればよい。その制
御は各種の位置センサー(図面省略)を組込みモーター
の駆動を制御すればよい。上記実施例においては、磁石
磁極面にポールピースを貼着した構成を示したが、該ポ
ールピースはこの発明を達成する上で不可欠の部材では
ない。Therefore, when the braking force is small, it is only necessary to increase or decrease the movement of the magnet so that the facing area between the permanent magnet and the rotor is located at an intermediate position between the overall correspondence and the entire separation. The control may be performed by incorporating various position sensors (not shown) and controlling the driving of the motor. In the above embodiment, the configuration in which the pole piece is adhered to the magnet pole surface is shown, but the pole piece is not an indispensable member for achieving the present invention.
制御トルク試験を行った結果を第5図に示す。すなわ
ち、各車速において希土類磁石を全面対応させた場合
A、3/4面対応させた場合B、及び1/2面対応させた場合
について制動トルクを測定した結果である。FIG. 5 shows the results of the control torque test. That is, at each vehicle speed, the braking torque was measured for the case where the rare earth magnet was made to correspond to the entire surface, the case where it was made to correspond to the 3/4 surface, and the case where it was made to correspond to the 1/2 surface.
また、永久磁石の進退はねじ棒とナットによるねじ力
を利用したが、これに限ることなく他の機構を利用する
ことができる。Further, although the forward and backward movement of the permanent magnet utilizes the screw force by the screw rod and the nut, other mechanisms can be used without being limited to this.
発明の効果 この発明は上記のごとく構成されており、ローターと
永久磁石の対応面積を変えることにより発生する制動ト
ルクが加減できるため、制動力の制御が容易で広範囲の
減速に適用できる。Effect of the Invention The present invention is configured as described above, and the braking torque generated by changing the corresponding area between the rotor and the permanent magnet can be adjusted, so that the braking force can be easily controlled and can be applied to a wide range of deceleration.
第1図はこの発明の実施による減速装置の制動状態にお
ける縦断面図、第2図は第1図A−A線上の側面図、第
3図は非制動状態における縦断面図、第4図は第1図の
右側面図で永久磁石群を有する支持リングを進退させる
ための駆動系の概略を示す説明図、第5図は希土類磁石
を使用した減速装置の車速と制動トルクの関係を示すグ
ラフである。 1……回転軸、2……冷却フィン 3……ローター、4……軸受箱筒 5……支持部材、6……ガイドレール 7……支持リング、8……スライド鞍 9……ポールピース、10……永久磁石 11……円筒、12……蓋板 13……ナット、14……ねじ棒 15……軸受、16……歯車 17……軸受、18……中間歯車 19……モータ、20……駆動歯車FIG. 1 is a longitudinal sectional view of a speed reduction device according to an embodiment of the present invention in a braking state, FIG. 2 is a side view on line AA in FIG. 1, FIG. 3 is a longitudinal sectional view in an unbraking state, and FIG. FIG. 1 is an explanatory view schematically showing a drive system for moving a support ring having a group of permanent magnets back and forth in a right side view of FIG. 1, and FIG. 5 is a graph showing a relationship between a vehicle speed and a braking torque of a speed reducer using a rare earth magnet. It is. DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... Cooling fin 3 ... Rotor 4 ... Bearing box 5 ... Support member 6, Guide rail 7 ... Support ring 8, Slide saddle 9 ... Pole piece, 10 ... permanent magnet 11 ... cylinder, 12 ... lid plate 13 ... nut, 14 ... threaded rod 15 ... bearing, 16 ... gear 17 ... bearing, 18 ... intermediate gear 19 ... motor, 20 ...... Driving gear
フロントページの続き (72)発明者 小林 隆 大阪府三島郡島本町江川2丁目15―17 住友特殊金属株式会社山崎製作所内 (56)参考文献 実開 昭61−52493(JP,U) 特公 昭40−327(JP,B1) 実公 昭53−9810(JP,Y1)Continued on the front page (72) Inventor Takashi Kobayashi 2-15-17 Egawa, Shimamoto-cho, Mishima-gun, Osaka Prefecture Sumitomo Special Metals Co., Ltd. Yamazaki Works 40-327 (JP, B1) Jiko 53-9810 (JP, Y1)
Claims (1)
ローターから切り離した円筒部を有する磁気シールドケ
ーシングをローターに隣接して固定配置し、隣接する磁
石の極性が互いに逆向きとなるようにして複数個の永久
磁石を周設した支持リングを、回転軸の軸線方向に永久
磁石の極面が所要空隙でローターに全面対向する位置か
ら全面離脱する磁気シールドケーシング位置までの長さ
を進退自在に設けた渦電流式減速装置。1. A rotor is fitted to one end of a rotating shaft, and a magnetic shield casing having a cylindrical portion separated from the rotor is fixedly arranged adjacent to the rotor, and the polarity of adjacent magnets is opposite to each other. The length of the support ring, in which a plurality of permanent magnets are provided in a circumferential direction, from the position where the pole faces of the permanent magnets are completely opposed to the rotor with a required gap in the axial direction of the rotation shaft to the position of the magnetic shield casing where the entire surface is separated. An eddy current type reduction gear that is provided so that it can move forward and backward.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63061631A JP2709821B2 (en) | 1988-03-14 | 1988-03-14 | Eddy current type reduction gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63061631A JP2709821B2 (en) | 1988-03-14 | 1988-03-14 | Eddy current type reduction gear |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01234043A JPH01234043A (en) | 1989-09-19 |
JP2709821B2 true JP2709821B2 (en) | 1998-02-04 |
Family
ID=13176732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63061631A Expired - Lifetime JP2709821B2 (en) | 1988-03-14 | 1988-03-14 | Eddy current type reduction gear |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2709821B2 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0759145B2 (en) * | 1989-10-11 | 1995-06-21 | いすゞ自動車株式会社 | Eddy current retarder |
JPH0811053Y2 (en) * | 1990-04-28 | 1996-03-29 | いすゞ自動車株式会社 | Eddy current retarder |
JP2506598Y2 (en) * | 1990-04-28 | 1996-08-14 | いすゞ自動車株式会社 | Eddy current type retarder |
JP2533075Y2 (en) * | 1990-06-28 | 1997-04-16 | いすゞ自動車株式会社 | Braking drum support structure for eddy current type reduction gear |
JPH07118903B2 (en) * | 1990-10-30 | 1995-12-18 | いすゞ自動車株式会社 | Eddy current type speed reducer |
JP2579698Y2 (en) * | 1993-02-12 | 1998-08-27 | 住友金属工業株式会社 | Eddy current type reduction gear |
DE19705290A1 (en) * | 1997-02-12 | 1998-09-24 | Zahnradfabrik Friedrichshafen | Hysteresis brake |
DE10313855B4 (en) * | 2003-03-26 | 2015-09-10 | Chr. Mayr Gmbh & Co. Kg | Hysteresis clutch or brake |
CN102497085A (en) * | 2011-12-23 | 2012-06-13 | 浙江大学 | Permanent-magnet eddy current retarder based on Halbach array |
US9656643B2 (en) | 2012-08-13 | 2017-05-23 | Nippon Steel & Sumitomo Metal Corporation | Retarding device using a fluid |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS539810U (en) * | 1975-10-29 | 1978-01-27 | ||
JPS6152493U (en) * | 1984-09-07 | 1986-04-09 |
-
1988
- 1988-03-14 JP JP63061631A patent/JP2709821B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01234043A (en) | 1989-09-19 |
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