JP2631418B2 - Eddy current type reduction gear - Google Patents
Eddy current type reduction gearInfo
- Publication number
- JP2631418B2 JP2631418B2 JP2283984A JP28398490A JP2631418B2 JP 2631418 B2 JP2631418 B2 JP 2631418B2 JP 2283984 A JP2283984 A JP 2283984A JP 28398490 A JP28398490 A JP 28398490A JP 2631418 B2 JP2631418 B2 JP 2631418B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed frame
- circumferential direction
- ferromagnetic plate
- eddy current
- 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.)
- Expired - Fee Related
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］ 本発明は主として大型車両に搭載されて摩擦ブレーキ
を補助する渦電流式減速装置、特に長時間の制動に対し
制動ドラムの温度上昇を抑え、安定した制動性能を発揮
する渦電流式減速装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention mainly relates to an eddy current type reduction device mounted on a large vehicle and assisting a friction brake, and in particular, suppresses a rise in the temperature of a braking drum against long-time braking. The present invention relates to an eddy current type reduction gear that exhibits stable braking performance.
［従来の技術］ 本出願人は特願平１−218499号により、第７図に示す
ような渦電流式減速装置を提案した。車両用変速機の歯
車箱の端壁から突出する出力回転軸１に、取付フランジ
２がスプライン嵌合されかつ外れないようにナツト1aに
より締結される。取付フランジ２に駐車ブレーキの制動
ドラム３の端壁と、渦電流減速装置の制動ドラム４のフ
ランジ部4aが重ね合され、複数のボルト５とナツトによ
り締結される。制動ドラム４の外周面に周方向等間隔
に、多数の冷却フイン７が備えられる。[Prior Art] The present applicant has proposed an eddy current type speed reducer as shown in FIG. 7 according to Japanese Patent Application No. 1-218499. A mounting flange 2 is spline-fitted to an output rotary shaft 1 protruding from an end wall of a gear box of a vehicle transmission and fastened by a nut 1a so as not to come off. The end wall of the braking drum 3 of the parking brake and the flange portion 4a of the braking drum 4 of the eddy current reduction device are overlapped on the mounting flange 2 and fastened with a plurality of bolts 5 and nuts. A large number of cooling fins 7 are provided on the outer peripheral surface of the braking drum 4 at equal intervals in the circumferential direction.
導体から制動ドラム４の内側に、断面長方形の内空部
17を有する非磁性体からなる固定枠９が配設される。固
定枠９は歯車箱の壁部に適当な手段により固定されるも
のであり、外筒と内筒の両端に環状の端壁板を結合して
構成してもよいが、図示の固定枠９は普通の鉄などの材
料からなる左半部の断面コ字形をなす筒形の枠部分16
と、アルミニウムなどの非磁性体からなる断面逆Ｌ字形
をなす筒形の枠部分15とを、多数のボルト18により結合
して構成される。Inside of the braking drum 4 from the conductor,
A fixed frame 9 made of a nonmagnetic material having 17 is provided. The fixed frame 9 is fixed to the wall of the gear box by an appropriate means, and may be formed by connecting annular end wall plates to both ends of the outer cylinder and the inner cylinder. Is a cylindrical frame part 16 with a U-shaped cross section in the left half made of a material such as ordinary iron
And a cylindrical frame portion 15 formed of a non-magnetic material such as aluminum and having an inverted L-shaped cross section.
制動ドラム４の内周面と対向する固定枠９の外筒部す
なわち枠部分15の周壁に、周方向等間隔に多数の開口が
設けられ、これらの開口に強磁性体（ポールピース）14
が嵌合固定される。実際には、枠部分15をアルミニウム
から鋳造する際に、強磁性板14を鋳ぐるんで構成する。
固定枠９に周方向等間隔に複数（好ましくは３個）のア
クチユエータ10が支持される。アクチユエータ10のシリ
ンダ11に嵌合したピストン12から固定枠９の内空部17へ
延びるロツド13の端部に磁石支持筒８が結合される。A large number of openings are provided at equal intervals in the circumferential direction in the outer cylindrical portion of the fixed frame 9 facing the inner peripheral surface of the braking drum 4, that is, the peripheral wall of the frame portion 15, and a ferromagnetic material (pole piece) 14 is provided in these openings.
Are fitted and fixed. In practice, when the frame portion 15 is cast from aluminum, the ferromagnetic plate 14 is cast.
A plurality (preferably three) of actuators 10 are supported on the fixed frame 9 at equal intervals in the circumferential direction. The magnet support tube 8 is connected to an end of a rod 13 extending from the piston 12 fitted to the cylinder 11 of the actuator 10 to the inner space 17 of the fixed frame 9.
磁石支持筒８は固定枠９の内筒部すなわち案内壁16a
に軸方向移動可能に支持される。磁石支持筒８の外周面
に、各強磁性板14と対向する同数の永久磁石６が、極性
を周方向に交互に異ならしめて結合される。The magnet support tube 8 is an inner tube portion of the fixed frame 9, that is, a guide wall 16a.
Is supported so as to be movable in the axial direction. The same number of permanent magnets 6 opposing each ferromagnetic plate 14 are coupled to the outer peripheral surface of the magnet support cylinder 8 by alternately changing the polarity in the circumferential direction.
制動時、アクチユエータ10の左端室へ供給される加圧
空気により、ロツド13を介して磁石支持筒８が案内壁16
aに沿つて右方へ押されると、図示のように永久磁石６
が強磁性板14と重なる。回転する制動ドラム４が、永久
磁石６からの強磁性板14を透過する磁力線を横切ると、
制動ドラム４に渦電流が流れ、制動トルクを受ける。During braking, pressurized air supplied to the left end chamber of the actuator 10 causes the magnet support cylinder 8 to move through the rod 13 to the guide wall 16.
When pushed to the right along a, the permanent magnet 6
Overlap with the ferromagnetic plate 14. When the rotating braking drum 4 crosses the lines of magnetic force transmitted from the permanent magnet 6 through the ferromagnetic plate 14,
An eddy current flows through the braking drum 4 and receives a braking torque.
高速道路や山岳道路を多く利用する大型車両の場合
に、長い下り坂で渦電流式減速装置による制動を行う
と、制動ドラム４の温度は600℃を超えることがある。
勿論、制動ドラム４は冷却フイン７により放熱性を高め
られているが、第７図に等温線で表すよに（理解を助け
るために、ハツチングは省略した）、従来の制動ドラム
４は内周面の軸方向中央部の温度が非常に高くなり、制
動ドラム４が熱変形を起したり、亀裂を生じる恐れがあ
る。ここで、制動ドラム４の最高温度となる部分が、軸
方向中心よりも左端（開放端）側に片寄つているのは、
制動ドラム４の右端側がスポーク4bによりフランジ部4a
に結合されているため、制動ドラム４の右端側の熱はフ
ランジ部4aへ迅速に伝達され、温度上昇が抑えられるか
らである。In the case of a large vehicle that frequently uses a highway or a mountain road, if braking is performed by an eddy current type reduction device on a long downhill, the temperature of the braking drum 4 may exceed 600 ° C.
Of course, the heat dissipation of the braking drum 4 is enhanced by the cooling fins 7. However, as shown by isotherms in FIG. 7 (hatching is omitted for the sake of understanding), the conventional braking drum 4 has an inner periphery. The temperature in the central portion in the axial direction of the surface becomes extremely high, and the braking drum 4 may be thermally deformed or cracked. Here, the reason why the highest temperature of the braking drum 4 is shifted to the left end (open end) side from the axial center is as follows.
The right end side of the braking drum 4 is a flange 4a by a spoke 4b.
This is because the heat on the right end side of the braking drum 4 is quickly transmitted to the flange portion 4a and the temperature rise is suppressed.
制動ドラム４の熱に対する強度を確保するために、制
動ドラム４の熱容量を大きくすると大形になり、重量増
加を来たし、車両への搭載が難しくなる。また、制動ド
ラム４の内周面と強磁性板14の外面との間の隙間ｃ（通
常は1mm程度）を拡大すれば、制動ドラム４の温度は低
下するが、永久磁石６が制動ドラム４に及ぼす制動トル
クも低下し、本来の機能を果さなくなる。If the heat capacity of the braking drum 4 is increased in order to secure the strength of the braking drum 4 against heat, the braking drum 4 becomes large, increases in weight, and becomes difficult to mount on the vehicle. If the gap c (normally about 1 mm) between the inner peripheral surface of the braking drum 4 and the outer surface of the ferromagnetic plate 14 is enlarged, the temperature of the braking drum 4 drops, but the permanent magnet 6 The braking torque exerted on the motor is also reduced, and the original function is not achieved.
［発明が解決しようとする問題点］ 本発明の目的は上述の問題に鑑み、強磁性板と制動ド
ラムまたは磁石との隙間を部分的に拡げることにより、
制動トルクの低下を避けつつ、制動ドラムの高温部の温
度を低くし、熱に対する強度を保つ、渦電流式減速装置
を提供することにある。[Problems to be Solved by the Invention] In view of the above problems, an object of the present invention is to partially widen a gap between a ferromagnetic plate and a braking drum or a magnet,
An object of the present invention is to provide an eddy current type speed reducer that lowers the temperature of a high-temperature portion of a brake drum and maintains heat resistance while avoiding a decrease in braking torque.
［問題を解決するための手段］ 上記目的を達成するために、本発明の構成は導体から
なる制動ドラムの基端を複数のスポークにより回転軸に
結合し、前記制動ドラムの内部に非磁性体からなりかつ
断面長方形の内空部を有する円筒形の固定枠を配設し、
該固定枠の外筒部に周方向等間隔に設けた多数の開口に
強磁性板を結合し、前記固定枠の内空部に磁性体からな
る磁石支持筒を軸方向移動可能に支持し、該磁石支持筒
の外周面に周方向等間隔かつ前記強磁性板に対向する極
性が周方向に交互に異なるように磁石を結合し、前記強
磁性板の外面と内面の一方の幅方向中心付近に、周方向
のくぼみを設けたことを特徴とするものである。Means for Solving the Problems In order to achieve the above object, according to the configuration of the present invention, a base end of a braking drum made of a conductor is connected to a rotating shaft by a plurality of spokes, and a non-magnetic material is provided inside the braking drum. And a cylindrical fixed frame having an inner space with a rectangular cross section is arranged,
A ferromagnetic plate is coupled to a large number of openings provided at equal intervals in the circumferential direction in the outer cylindrical portion of the fixed frame, and a magnet supporting cylinder made of a magnetic material is supported in the inner space of the fixed frame so as to be movable in the axial direction, A magnet is coupled to the outer circumferential surface of the magnet support cylinder at equal intervals in the circumferential direction and so that the polarities facing the ferromagnetic plate are alternately different in the circumferential direction, and near the center of one of the outer surface and the inner surface in the width direction of the ferromagnetic plate. And a recess in the circumferential direction.
［作用］ 本発明によれば、強磁性板の内外面の軸方向中央部な
いし開放端側（制動ドラムの開放端側）に周方向のくぼ
みを設けることにより、くぼみの部分で永久磁石が制動
ドラムに及ぼす磁界が弱くなり、渦電流による発熱量が
抑えられる。また、くぼみにより強磁性板と制動ドラム
の隙間、または強磁性板と永久磁石の隙間が部分的に拡
がり、冷却性が高められるので、高温部となる制動ドラ
ムの軸方向中央部の温度が低くなり、制動ドラムの両端
側の温度に近くなる。[Operation] According to the present invention, the permanent magnet is braked at the recess by providing a circumferential recess at the axial center or the open end (open end of the braking drum) of the inner and outer surfaces of the ferromagnetic plate. The magnetic field applied to the drum is weakened, and the amount of heat generated by the eddy current is suppressed. In addition, the gap partially widens the gap between the ferromagnetic plate and the braking drum, or the gap between the ferromagnetic plate and the permanent magnet, and enhances cooling performance. And the temperature at both ends of the braking drum approaches.
本発明に係る周方向のくぼみは、強磁性板の内面また
は外面へ局部的に設けるものであるから、強磁性板の全
面について隙間を拡げるよりは、制動トルクの低下が少
く、制動ドラムの局部的な高温化が避けられ、制動ドラ
ムの耐久性が確保される。Since the circumferential depression according to the present invention is provided locally on the inner surface or the outer surface of the ferromagnetic plate, the reduction of the braking torque is smaller than the case where the gap is widened over the entire surface of the ferromagnetic plate, and the locality of the braking drum is reduced. Temperature rise is avoided, and the durability of the braking drum is ensured.
［発明の実施例］ 第１図は本発明に係る渦電流式減速装置の制動ドラム
と固定枠の側面断面図である。導体からなる制動ドラム
４の基端が複数のスポーク4bにより回転軸に結合され、
制動ドラム４の内部に非磁性体からなりかつ断面長方形
の内空部を有する円筒形の固定枠９を配設される。固定
枠９は普通の材料からなる断面コ字形をなす筒形の枠部
分（第７図参照）と、非磁性体からなる断面額Ｌ字形を
なす筒形の枠部分15とを、多数のボルトにより結合して
構成される。固定枠９の内空部に磁石支持筒８が制動ド
ラム４の軸線方向に摺動可能に支持され、磁石支持筒８
の外周面に結合した永久磁石６から、固定枠９の外筒部
に結合した強磁性板14を透過して制動ドラム４へ向う磁
力線、回転する制動ドラム４が横切る時、制動ドラム４
に渦電流が発生し、制動ドラム４が制動トルクを受け
る。FIG. 1 is a side sectional view of a brake drum and a fixed frame of an eddy current type reduction gear according to the present invention. The base end of the braking drum 4 made of a conductor is connected to the rotating shaft by a plurality of spokes 4b,
A cylindrical fixed frame 9 made of a non-magnetic material and having an inner space with a rectangular cross section is disposed inside the braking drum 4. The fixing frame 9 is made up of a cylindrical frame portion having a U-shaped cross section made of ordinary material (see FIG. 7) and a cylindrical frame portion 15 having an L-shaped cross section made of a non-magnetic material. It is constituted by combining. A magnet support tube 8 is supported in the inner space of the fixed frame 9 so as to be slidable in the axial direction of the braking drum 4.
When the rotating brake drum 4 crosses when the rotating magnetic drum 4 traverses from the permanent magnet 6 connected to the outer peripheral surface of the permanent magnet 6 to the brake drum 4 through the ferromagnetic plate 14 bonded to the outer cylindrical portion of the fixed frame 9,
Generates an eddy current, and the braking drum 4 receives a braking torque.
図示の実施例では、放熱性を高めるために、制動ドラ
ム４の基端は回転軸に結合されるフランジ部から放射方
向に延びる多数のスポーク4bに支持される。スポーク4b
の外端は、制動ドラム４の基端部の端縁に設けた切欠4c
へ係合され、かつ溶接により結合される。In the illustrated embodiment, the base end of the braking drum 4 is supported by a number of spokes 4b extending radially from a flange portion connected to the rotating shaft in order to enhance heat dissipation. Spoke 4b
Is provided with a notch 4c provided at the edge of the base end of the braking drum 4.
And welded together.
制動ドラム４の外周面に結合される冷却フイン７は、
制動ドラム４の回転方向に対し傾けて配設され、冷却フ
イン７の先端部ないし左端部は制動ドラム４の先端部か
ら左方へ長く突出される。The cooling fin 7 coupled to the outer peripheral surface of the braking drum 4
The cooling fin 7 is disposed obliquely with respect to the rotation direction of the braking drum 4, and the tip or left end of the cooling fin 7 protrudes leftward from the tip of the braking drum 4.
本発明によれば、強磁性板14の外面の軸方向ないし軸
方向の中心部、好ましくは幅方向中心よりも制御ドラム
の先端側ないし開放端側へ片寄つた部分に、周方向の浅
い断面円弧状のくぼみ21が形成される。くぼみ21の深さ
ｄは制動ドラム４の内周面4eと強磁性板14との間の隙間
ｃ（第７図参照）の約1.2〜1.4倍、くぼみ21の幅ｗは強
磁性板14ないし永久磁石６の幅の約0.1〜0.3倍とする。According to the present invention, the outer circumferential surface of the ferromagnetic plate 14 has a shallow cross-sectional circle in the circumferential direction at an axially or axially central portion, preferably at a portion offset toward the leading end or the open end side of the control drum from the widthwise center. An arc-shaped depression 21 is formed. The depth d of the recess 21 is about 1.2 to 1.4 times the gap c between the inner peripheral surface 4e of the braking drum 4 and the ferromagnetic plate 14 (see FIG. 7), and the width w of the recess 21 is between the ferromagnetic plate 14 and The width is about 0.1 to 0.3 times the width of the permanent magnet 6.
上述のように、強磁性板14の外面にくぼみ21を設けた
ことにより、くぼみ21の付近の冷却効果が高くなり、ま
た渦電流による発熱量が多少減少するので、温度上昇が
抑えられる。したがつて、温度上昇による制動性能の低
下が抑えられ、熱による制動ドラム４の変形や破損に対
する安全性が向上される。As described above, by providing the recess 21 on the outer surface of the ferromagnetic plate 14, the cooling effect near the recess 21 is enhanced, and the amount of heat generated by the eddy current is somewhat reduced, so that the temperature rise is suppressed. Accordingly, a decrease in the braking performance due to a temperature rise is suppressed, and the safety of the braking drum 4 against deformation and breakage due to heat is improved.
第２図に示す実施例では、強磁性板14の幅方向中心よ
りも左側（制動ドラムの先端側）に片寄つた部分から左
端縁（制動ドラムの先端側の端縁）までの幅ｗを有し、
かつ深さｄが浅うい周方向のくぼみ22を、強磁性板14の
外面に設けたものである。くぼみ22は強磁性板14の左端
縁まで拡がつているから、放熱性が向上し、永久磁石６
に重なる部分の幅ｗは狭くてもよい。制動ドラム４の最
高温度となる部分は、くぼみ22よりも幅方向中心側にな
るが、くぼみ22により冷却性が高くなるので、制動ドラ
ム４の内周面4eの軸方向中央部の温度上昇が抑えられ
る。In the embodiment shown in FIG. 2, there is a width w from the portion deviated to the left (the tip side of the braking drum) from the center in the width direction of the ferromagnetic plate 14 to the left edge (the edge on the tip side of the braking drum). And
A circumferential recess 22 having a shallow depth d is provided on the outer surface of the ferromagnetic plate 14. Since the recess 22 extends to the left edge of the ferromagnetic plate 14, heat dissipation is improved and the permanent magnet 6
May have a small width w. The highest temperature portion of the braking drum 4 is closer to the center in the width direction than the recess 22. However, since the cooling performance is enhanced by the recess 22, the temperature rise in the axial center portion of the inner peripheral surface 4e of the braking drum 4 is reduced. Can be suppressed.
第３図に示す実施例は、強磁性板14の外面について、
左端側（制動ドラム４の先端側）をテーパ状にカツトし
たものである。テーパ状のくぼみ23が永久磁石６の外面
に重なる部分の幅ｗは、第２図の実施例よりも狭くて
も、制動ドラム４の先端側の冷却性が高いので、制動ド
ラム４の軸方向中央部の温度上昇が抑えられる。The embodiment shown in FIG.
The left end side (the end side of the braking drum 4) is cut in a tapered shape. Even if the width w of the portion where the tapered recess 23 overlaps the outer surface of the permanent magnet 6 is narrower than that of the embodiment of FIG. The temperature rise in the central part is suppressed.
第１〜３図の実施例では、くぼみ21〜23を強磁性板14
の外面に形成したが、これらのくぼみは強磁性板14の内
面に形成して永久磁石６との間の隙間を拡げるようにし
てもよい。In the embodiment of FIGS. 1-3, the recesses 21-23 are
However, these recesses may be formed on the inner surface of the ferromagnetic plate 14 so as to widen the gap between the permanent magnet 6.
第４図の実施例では、強磁性板14の内面に第１図のく
ぼみ21に対応するくぼみ21aを設けたもの、第５図の実
施例は強磁性板14の内面に第２図のくぼみ22に対応する
くぼみ22aを設けたもの、第６図の実施例は強磁性板14
の内面に第３図のくぼみ23に対応するテーパ状のくぼみ
23aを設けたものである。制動時、制動ドラム４に発生
する渦電流のエネルギは熱に変換される。くぼみ21a〜2
3aにより制動ドラム４の軸方向中央部の渦電流が抑えら
れるので、発熱量が少くなり、くぼみ21a〜23aの冷却効
果と相俟つて、制動ドラム４の軸方向中央部の温度上昇
が抑えられる。In the embodiment of FIG. 4, the recess 21a corresponding to the recess 21 of FIG. 1 is provided on the inner surface of the ferromagnetic plate 14, and in the embodiment of FIG. 5, the recess of FIG. FIG. 6 shows an embodiment in which a recess 22a corresponding to 22 is provided.
Tapered recess corresponding to recess 23 in FIG. 3 on the inner surface of
23a. During braking, the energy of the eddy current generated in the braking drum 4 is converted into heat. Hollow 21a-2
Since the eddy current at the axial center of the brake drum 4 is suppressed by 3a, the amount of heat generation is reduced, and the temperature rise at the axial center of the brake drum 4 is suppressed in combination with the cooling effect of the recesses 21a to 23a. .
［発明の効果］ 本発明は上述のように、導体からなる制動ドラムの基
端を複数のスポークにより回転軸に結合し、前記制動ド
ラムの内部に非磁性体からなりかつ断面長方形の内空部
を有する円筒形の固定枠を配設し、該固定枠の外筒部に
周方向等間隔に設けた多数の開口に強磁性板を結合し、
前記固定枠の内空部に磁性体からなる磁石支持筒を軸方
向移動可能に支持し、該磁石支持筒の外周面に周方向等
間隔かつ前記強磁性板に対する極性が周方向に異なるよ
うに磁石を結合し、前記強磁性板の外面と内面の一方の
幅方向中心付近に、周方向のくぼみを設けたものである
から、全体からみれば制動トルクの低下は僅かなもので
あり、強磁性板のくぼみの部分で制動ドラムまたは永久
磁石との隙間が拡がり、冷却性が高くなるとともに、渦
電流による発熱量が少くなるので、制動ドラムの局部的
な温度上昇が避けられ、制動ドラムの熱に対する耐久性
が向上される。[Effect of the Invention] As described above, according to the present invention, a base end of a braking drum made of a conductor is connected to a rotating shaft by a plurality of spokes, and an inner space made of a non-magnetic material and having a rectangular cross section is formed inside the braking drum. Arrange a cylindrical fixed frame having a, ferromagnetic plate coupled to a number of openings provided at equal intervals in the circumferential direction in the outer cylindrical portion of the fixed frame,
A magnet support cylinder made of a magnetic material is supported in the inner space of the fixed frame so as to be movable in the axial direction. Since the magnet is coupled and a circumferential recess is provided near the center in the width direction on one of the outer surface and the inner surface of the ferromagnetic plate, the braking torque is slightly reduced as a whole when viewed from the whole. The gap between the brake drum and the permanent magnet expands in the recessed portion of the magnetic plate, increasing the cooling performance and reducing the amount of heat generated by the eddy current. The durability against heat is improved.
第１〜６図は本発明の第１〜６実施例に係る渦電流式減
速装置の制動ドラムと固定枠の側面断面図、第７図は従
来の渦電流式減速装置の側面断面図である。 4:制動ドラム、6:永久磁石、8:磁石支持筒、9:固定枠、
14:強磁性板、17:内空部、21〜23:くぼみ、21a〜23a:く
ぼみ1 to 6 are side sectional views of a braking drum and a fixed frame of an eddy current type reduction gear according to first to sixth embodiments of the present invention, and FIG. 7 is a side sectional view of a conventional eddy current type reduction gear. . 4: braking drum, 6: permanent magnet, 8: magnet support cylinder, 9: fixed frame,
14: ferromagnetic plate, 17: inner space, 21-23: hollow, 21a-23a: hollow
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−208856（ＪＰ，Ａ) 特開 平４−12660（ＪＰ，Ａ) 実開 昭60−103280（ＪＰ，Ｕ) 実開 平２−103532（ＪＰ，Ｕ) 実開 平３−74187（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-57-208856 (JP, A) JP-A-4-12660 (JP, A) JP-A-60-103280 (JP, U) JP-A-2- 103532 (JP, U) Fully open Hei 3-74187 (JP, U)
Claims (2)
ポークにより回転軸に結合し、前記制動ドラムの内部に
非磁性体からなりかつ断面長方形の内空部を有する円筒
形の固定枠を配設し、該固定枠の外筒部に周方向等間隔
に設けた多数の開口に強磁性板を結合し、前記固定枠の
内空部に磁性体からなる磁石支持筒を軸方向移動可能に
支持し、該磁石支持筒の外周面に周方向等間隔かつ前記
強磁性板に対向する極性が周方向に交互に異なるように
磁石を結合し、前記強磁性板の外面と内面の一方の幅方
向中心付近に、周方向のくぼみを設けたことを特徴とす
る渦電流式減速装置。A base end of a brake drum made of a conductor is connected to a rotating shaft by a plurality of spokes, and a cylindrical fixed frame made of a non-magnetic material and having a hollow section having a rectangular cross section is provided inside the brake drum. Arranged, ferromagnetic plates are coupled to a number of openings provided at equal intervals in the circumferential direction on the outer cylindrical portion of the fixed frame, and a magnet supporting tube made of a magnetic material can be axially moved in the inner space of the fixed frame. And magnets are coupled to the outer peripheral surface of the magnet support cylinder at equal intervals in the circumferential direction and the polarities facing the ferromagnetic plate are alternately different in the circumferential direction, and one of the outer surface and the inner surface of the ferromagnetic plate is connected. An eddy current type reduction gear characterized in that a circumferential recess is provided near the center in the width direction.
ポークにより回転軸に結合し、前記制動ドラムの内部に
非磁性体からなりかつ断面長方形の内空部を有する円筒
形の固定枠を配設し、該固定枠の外筒部に周方向等間隔
に設けた多数の開口に強磁性板を結合し、前記固定枠の
内空部に磁性体からなる磁石支持筒を軸方向移動可能に
支持し、該磁石支持筒の外周面に周方向等間隔かつ前記
強磁性板に対向する極性が周方向に交互に異なるように
磁石を結合し、前記強磁性板の外面と内面の一方の幅方
向中央部付近から前記スポークと反対側の端縁までの部
分に、周方向のくぼみを設けたことを特徴とする渦電流
式減速装置。 減速装置。2. A brake drum made of a conductor, the base end of which is connected to a rotating shaft by a plurality of spokes, and a cylindrical fixed frame made of a non-magnetic material and having an inner space having a rectangular cross section is provided inside the brake drum. Arranged, ferromagnetic plates are coupled to a number of openings provided at equal intervals in the circumferential direction on the outer cylindrical portion of the fixed frame, and a magnet supporting tube made of a magnetic material can be axially moved in the inner space of the fixed frame. And magnets are coupled to the outer peripheral surface of the magnet support cylinder at equal intervals in the circumferential direction and the polarities facing the ferromagnetic plate are alternately different in the circumferential direction, and one of the outer surface and the inner surface of the ferromagnetic plate is connected. An eddy current type reduction gear characterized in that a recess in the circumferential direction is provided in a portion from the vicinity of the center in the width direction to the end edge opposite to the spoke. Reduction gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2283984A JP2631418B2 (en) | 1990-10-22 | 1990-10-22 | Eddy current type reduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2283984A JP2631418B2 (en) | 1990-10-22 | 1990-10-22 | Eddy current type reduction gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04161054A JPH04161054A (en) | 1992-06-04 |
| JP2631418B2 true JP2631418B2 (en) | 1997-07-16 |
Family
ID=17672782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2283984A Expired - Fee Related JP2631418B2 (en) | 1990-10-22 | 1990-10-22 | Eddy current type reduction gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2631418B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505902A (en) * | 2018-03-08 | 2019-03-22 | 吴国呈 | Magnetic field automobile dish hub is added to stop |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60103280U (en) * | 1983-12-20 | 1985-07-13 | 三菱電機株式会社 | Disc type eddy current brake |
| JPH02103532U (en) * | 1989-02-07 | 1990-08-17 | ||
| JP2701084B2 (en) * | 1990-04-28 | 1998-01-21 | いすゞ自動車株式会社 | Eddy current type reduction gear |
-
1990
- 1990-10-22 JP JP2283984A patent/JP2631418B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04161054A (en) | 1992-06-04 |
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