JPH0652386U - Eddy current type speed reducer - Google Patents
Eddy current type speed reducerInfo
- Publication number
- JPH0652386U JPH0652386U JP9225992U JP9225992U JPH0652386U JP H0652386 U JPH0652386 U JP H0652386U JP 9225992 U JP9225992 U JP 9225992U JP 9225992 U JP9225992 U JP 9225992U JP H0652386 U JPH0652386 U JP H0652386U
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- eddy current
- magnetic pole
- speed reducer
- type speed
- 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
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 239000000470 constituent Substances 0.000 claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000013017 mechanical damping Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
(57)【要約】
【目的】 バスやトラックなどの大型自動車に使用され
る渦電流式減速装置おいて、磁極片と永久磁石からなる
永久磁石構成体の永久磁石の温度上昇を低減するととも
に、作動中の永久磁石構成体の脱落防止を可能にする構
成の提供。
【構成】 磁極片６の永久磁石７との対向面には、その
両側端部にレール状の突起６ａを形成し、磁極片６と永
久磁石７とが固定ボルト９にて磁石支持リング８に固定
配置された状態では、磁極片６に形成されている突起６
ａによって、互いの接合面間に回転軸の軸線方向と同方
向に貫通する冷却風の通気路１５を形成し、永久磁石構
成体５を固定ボルト９にて磁石支持リング８に固定配置
した後、隣接する永久磁石構成体５間の凹部１４に樹脂
１６を充填固化する。
【効果】 永久磁石構成体５間の凹部１４を樹脂１６に
て充填することによって、該凹部１４を通過する冷却風
を遮断して前記通気路１５に集中させ、永久磁石７の磁
極面を効率よく冷却する。
(57) [Abstract] [Purpose] In an eddy current type speed reducer used in a large automobile such as a bus or a truck, the temperature rise of the permanent magnet of the permanent magnet structure including the pole pieces and the permanent magnet is reduced, and Providing a structure capable of preventing the permanent magnet structure from falling during operation. [Structure] Rail-shaped projections 6a are formed on both side ends of a surface of the pole piece 6 facing the permanent magnet 7, and the pole piece 6 and the permanent magnet 7 are fixed to a magnet support ring 8 by a fixing bolt 9. The projections 6 formed on the pole pieces 6 in the fixed arrangement state.
After forming the ventilation passage 15 for the cooling air penetrating in the same direction as the axial direction of the rotary shaft between the joining surfaces by a, the permanent magnet structure 5 is fixedly arranged on the magnet support ring 8 by the fixing bolt 9. The resin 16 is filled into the concave portions 14 between the adjacent permanent magnet constituents 5 and solidified. [Effects] By filling the recesses 14 between the permanent magnet structures 5 with the resin 16, the cooling air passing through the recesses 14 is blocked and concentrated in the ventilation passages 15, and the magnetic pole surfaces of the permanent magnets 7 are efficiently made. Cool well.
Description
【０００１】[0001]
この考案は、バスやトラックなどの大型自動車に使用される渦電流式減速装置 の改良に係り、特に、磁極片と永久磁石からなる永久磁石構成体の構成を工夫す ることによって、永久磁石の温度上昇を低減するとともに、作動中の永久磁石構 成体の脱落防止を可能とした渦電流式減速装置に関する。 The present invention relates to an improvement in an eddy current type speed reducer used in a large automobile such as a bus or a truck, and in particular, by devising a structure of a permanent magnet structure composed of a magnetic pole piece and a permanent magnet, The present invention relates to an eddy current type speed reducer capable of reducing the temperature rise and preventing the permanent magnet structure from falling during operation.
【０００２】[0002]
大型自動車の渦電流式減速装置は、長い坂道の降坂時などで安定した減速を行 い、かつフットブレーキの焼損を防止するために配置されるもので、渦電流を発 生するための磁界発生源により電磁石型と永久磁石型に区別される。 永久磁石型の場合は、電磁石型に比べ電磁コイル等が不要なため小型軽量化が 可能であり、また制動時に常に通電しておく必要がないことからバッテリの電力 消耗が少ない等の長所を有する。また、制動トルクを調整するために機械的な制 動トルク調整機構を配置していることも特徴の一つである。 The eddy current type speed reducer for large automobiles is arranged to perform stable deceleration when downhill on a long hill and prevent burnout of the foot brake. It is classified into an electromagnet type and a permanent magnet type depending on the generation source. The permanent magnet type does not require an electromagnetic coil, etc., as compared to the electromagnet type, so it can be made smaller and lighter, and it has the advantage that the battery does not consume much electricity because it does not need to be energized at all times during braking. . Another feature is that a mechanical damping torque adjusting mechanism is arranged to adjust the braking torque.
【０００３】 永久磁石型の渦電流式減速装置としては、磁極片を配置した永久磁石からなる 複数個の永久磁石構成体を互いに隣接する磁極面が異磁極となるよう環状に固定 配置してなる磁石支持リングと、回転軸の片側端部に嵌着し前記永久磁石構成体 の磁極面と所要空隙を形成して対向する渦電流発生用円筒部を配置してなるロー ターとを有し、永久磁石構成体の磁極面と渦電流発生用円筒部との対向面積を可 変可能にすべく前記磁石支持リングを介して永久磁石構成体を回転軸の軸線方向 に移動自在に配置した渦電流式減速装置（特開平１−２３４０４３号）が提案さ れている。In a permanent magnet type eddy current type speed reducer, a plurality of permanent magnet constituent bodies made up of permanent magnets having pole pieces arranged are fixedly arranged in an annular shape so that adjacent magnetic pole surfaces have different magnetic poles. A magnet support ring, and a rotor that is fitted to one end of the rotary shaft and that has an eddy current generating cylindrical portion that faces the magnetic pole surface of the permanent magnet structure and that forms a required gap, An eddy current in which the permanent magnet structure is movably arranged in the axial direction of the rotating shaft via the magnet support ring so that the facing area between the magnetic pole surface of the permanent magnet structure and the eddy current generating cylinder can be changed. Japanese Patent Laid-Open No. 1-234043 has been proposed.
【０００４】 機械的な制動トルク調整機構としては、上記の提案の中にも示されているが、 磁石支持リングの内周面の数ヵ所に固着されるナットに螺合するねじ棒を歯車装 置を介して永久磁石ケーシングの外側に配置するモータにて駆動し、磁石支持リ ングとともに永久磁石を回転軸の軸線方向に移動する構成（例えば、実開平２− ６５０８７号）や、永久磁石ケーシングの外側に配置するエアーシリンダのピス トンロッドに直接支持リングを接合して、エアーシリンダの作動により磁石支持 リングとともに永久磁石を回転軸の軸線方向に移動する構成（例えば、実開平２ −１０４７８４号、実開平３−７４１８５号）等が具体的な構成として提案され ている。As a mechanical braking torque adjusting mechanism, which is also shown in the above proposal, a threaded rod that is screwed into a nut fixed to several places on the inner peripheral surface of the magnet supporting ring is mounted on the gear. Driven by a motor arranged outside the permanent magnet casing via a stand, the permanent magnet is moved along with the magnet support ring in the axial direction of the rotary shaft (for example, No. 2-65087). A support ring is directly joined to the piston rod of the air cylinder located outside the air cylinder, and the permanent magnet is moved along with the magnet support ring in the axial direction of the rotating shaft by the operation of the air cylinder (for example, the actual open flat No. 2-104784, Jitsukaihei 3-74185) has been proposed as a specific configuration.
【０００５】 ここで、図６に示す機械的な制動トルク調整機構として、エアーシリンダを配 置した従来の渦電流式減速装置を例に一層詳細に説明する。 図６において、１は回転軸２の片側端部に嵌着するローターであり、外周部に は渦電流発生用の円筒部３が配置されている。４は、円筒部３の外周面所要位置 に固着される冷却用フィンである。 ５は、永久磁石構成体であり、磁極片６を配置した厚さ方向（図中上下方向） に磁化された永久磁石７からなり、互いに隣接する磁極面が異磁極となるよう磁 石支持リング８に環状に固定配置されている。 これら磁極片６と永久磁石７との磁石支持リング８への固定配置には、通常、 作動中の脱落を防止するために、図７に示すように固定ボルト９が使用されてい る。 １０は、上記永久磁石構成体５を配置した磁石支持リング８を収納するケーシ ングである。１１は、機械的な制動トルク調整機構を構成するエアーシリンダで あり、ピストンロッド１２を介して前記磁石支持リング８に接続されている。な お、図中１３は支持リング６の案内部材である。Here, as a mechanical braking torque adjusting mechanism shown in FIG. 6, a conventional eddy current type speed reducer in which an air cylinder is arranged will be described in more detail as an example. In FIG. 6, reference numeral 1 denotes a rotor fitted to one end of the rotary shaft 2, and a cylindrical portion 3 for generating an eddy current is arranged on the outer peripheral portion. Reference numeral 4 is a cooling fin fixed to a required position on the outer peripheral surface of the cylindrical portion 3. Reference numeral 5 denotes a permanent magnet structure, which is composed of a permanent magnet 7 magnetized in the thickness direction (vertical direction in the drawing) in which the magnetic pole pieces 6 are arranged, and a magnet support ring so that mutually adjacent magnetic pole surfaces have different magnetic poles. 8 is fixedly arranged in a ring shape. In order to prevent the magnetic pole piece 6 and the permanent magnet 7 from being fixed to the magnet support ring 8, a fixing bolt 9 is usually used as shown in FIG. 7 in order to prevent the magnetic pole piece 6 and the permanent magnet 7 from falling off during operation. Reference numeral 10 is a casing for housing the magnet support ring 8 in which the permanent magnet structure 5 is arranged. An air cylinder 11 constitutes a mechanical braking torque adjusting mechanism, and is connected to the magnet support ring 8 via a piston rod 12. Reference numeral 13 in the figure is a guide member for the support ring 6.
【０００６】 このような構成からなる渦電流式減速装置において、ローター１に所定の制動 トルクを作用させるためには、エアーシリンダ１１を作動させ、永久磁石構成体 ５を図示の如く磁極面が円筒部３の内周面に全面対向するよう回転軸２の軸線方 向（図中左方向）に移動させ、該永久磁石構成体５から発生する磁束と回転する 円筒部３との作用によって該円筒部３に渦電流を発生し、目的とする制動トルク を得るのである。 一方、上記の状態から制動トルクを低下させ、ローター１への制動を解放する ためには、再びエアーシリンダ１１を作動させ、円筒部３の内周面に対向する永 久磁石構成体５の磁極面の量（面積）を減少させるよう該永久磁石構成体５を回 転軸２の軸線方向（図中右方向）に移動させ、最終的に永久磁石構成体５から発 生する磁束が回転する円筒部３に作用しない位置にまで移動させることによって 制動を解放する。In the eddy current type speed reducer having such a configuration, in order to apply a predetermined braking torque to the rotor 1, the air cylinder 11 is operated, and the permanent magnet structure 5 has a cylindrical magnetic pole surface as shown in the drawing. It is moved in the axial direction of the rotary shaft 2 (leftward in the drawing) so as to entirely face the inner peripheral surface of the portion 3, and the magnetic flux generated from the permanent magnet structure 5 and the rotating cylindrical portion 3 cause the cylinder to rotate. An eddy current is generated in the portion 3 to obtain the target braking torque. On the other hand, in order to reduce the braking torque from the above state and release the braking to the rotor 1, the air cylinder 11 is activated again, and the magnetic pole of the permanent magnet structure 5 facing the inner peripheral surface of the cylindrical portion 3 is magnetically actuated. The permanent magnet structure 5 is moved in the axial direction of the rotating shaft 2 (rightward in the figure) so as to reduce the amount (area) of the surface, and finally the magnetic flux generated from the permanent magnet structure 5 rotates. The braking is released by moving the cylindrical portion 3 to a position where it does not act.
【０００７】[0007]
以上に示すように、渦電流を発生するための磁界発生源として永久磁石を使用 した渦電流式減速装置は、小型軽量化が可能であり、バッテリの電力消耗が少な い等の長所を有し、しかも比較的容易に制動トルク調整が可能であるが、永久磁 石の温度上昇に伴い、永久磁石の磁気特性が低下し、制動トルクの減少を招くこ とがある。 作動中には冷却フィンによって外部からの冷却風を永久磁石構成体に送風する よう構成されているが、永久磁石構成体５は図７に示すように磁極片６と永久磁 石７とが固定ボルトによって互い密着固定されていることから、前記冷却風は隣 接する永久磁石構成体５間の凹部１４を通過するだけで、特に加熱しやすい永久 磁石７の磁極面（磁極片６との接合面）を冷却する効果は極めて小さい。 As described above, an eddy current type speed reducer that uses a permanent magnet as a magnetic field generation source for generating an eddy current has the advantages that it can be made smaller and lighter, and battery power consumption is low. Moreover, although the braking torque can be adjusted relatively easily, there is a possibility that the magnetic characteristics of the permanent magnet are deteriorated as the temperature of the permanent magnet rises, and the braking torque is reduced. During operation, the cooling fins are configured to blow the cooling air from the outside to the permanent magnet structure. In the permanent magnet structure 5, the pole pieces 6 and the permanent magnets 7 are fixed as shown in FIG. Since the cooling winds are closely fixed to each other by bolts, the cooling air only passes through the recesses 14 between the adjacent permanent magnet constituents 5, so that it is particularly easy to heat the magnetic pole surface of the permanent magnet 7 (joint surface with the magnetic pole piece 6). The effect of cooling a) is extremely small.
【０００８】 また、通常、制動トルク解放時に該装置外部への磁束漏洩を防止するために永 久磁石構成体５の磁極面に対向する位置のケーシングには磁束短絡用磁性材料が 配置されていることから、磁石構成体５は磁気的な吸引作用を受けることとなる 。さらに、これらの永久磁石構成体５は、作動中にたえず振動の影響を受けてい ることから、従来の固定ボルト９による固定のみでは十分とは言えず、永久磁石 構成体５の脱落が懸念されていた。Further, normally, in order to prevent the magnetic flux from leaking to the outside of the device when the braking torque is released, a magnetic material for magnetic flux short circuit is arranged in the casing at a position facing the magnetic pole surface of the permanent magnet structure 5. Therefore, the magnet structure 5 is magnetically attracted. Further, since the permanent magnet structure 5 is constantly affected by vibration during operation, it cannot be said that the conventional fixing bolt 9 is sufficient for fixing, and there is a concern that the permanent magnet structure 5 may come off. Was there.
【０００９】 この考案は、上記の問題点を解決することを目的とし、特に、磁極片と永久磁 石からなる永久磁石構成体の構成を工夫することによって、永久磁石の温度上昇 を低減するとともに、作動中の永久磁石構成体の脱落防止を可能とした渦電流式 減速装置の提案を目的とするものである。The present invention aims to solve the above-mentioned problems, and in particular, by devising the configuration of a permanent magnet structure including a pole piece and a permanent magnet, the temperature rise of the permanent magnet is reduced and The purpose of the present invention is to propose an eddy current type speed reducer capable of preventing the permanent magnet structure from falling during operation.
【００１０】[0010]
この考案は、上記の目的を達成するために種々検討した結果、隣接する永久磁 石構成体間の凹部を樹脂にて充填することによって磁石構成体自体の固着強度を 高めるとともに、該凹部を通過する冷却風を実質的に遮断して磁極片と永久磁石 との対向面間に形成する通気路に集中させ、永久磁石の磁極面を効率よく冷却す る構成を知見し、考案を完成したものである。 As a result of various investigations in order to achieve the above-mentioned object, the present invention enhances the fixing strength of the magnet structure itself by filling the recesses between the adjacent permanent magnet constituents with resin, and at the same time passes through the recesses. Completed the invention by discovering a configuration that effectively cools the magnetic pole surface of the permanent magnet by substantially shutting off the cooling air that is generated and concentrating it in the ventilation path formed between the facing surfaces of the pole piece and the permanent magnet. Is.
【００１１】 すなわち、この考案は、磁極片を配置した永久磁石からなる複数個の永久磁石 構成体を互いに隣接する磁極面が異磁極となるよう固定ボルトにて環状に固定配 置してなる磁石支持リングと、回転軸の片側端部に嵌着し前記永久磁石構成体の 磁極面と所要空隙を形成して対向する渦電流発生用円筒部を配置してなるロータ ーとを有し、前記磁石支持リングを介して永久磁石構成体を回転軸の軸線方向に 移動自在に配置し永久磁石構成体の磁極面と渦電流発生用円筒部との対向面積を 可変にした渦電流式減速装置において、 前記磁極片と永久磁石との対向面間に回転軸の軸線方向と同方向に貫通する通気 路を形成するとともに、隣接する永久磁石構成体間を樹脂にて充填固化したこと を特徴とする渦電流式減速装置である。That is, the present invention is a magnet in which a plurality of permanent magnet constituents made up of permanent magnets having magnetic pole pieces arranged are fixedly annularly arranged by fixing bolts so that adjacent magnetic pole surfaces have different magnetic poles. A rotor having a support ring and a cylindrical portion for generating an eddy current which is fitted to one end of the rotary shaft and forms a required gap with the magnetic pole surface of the permanent magnet structure to face each other; In an eddy current type speed reducer in which the permanent magnet structure is movably arranged in the axial direction of the rotary shaft via a magnet support ring and the facing area between the magnetic pole surface of the permanent magnet structure and the eddy current generating cylinder is variable. A ventilation passage is formed between the opposing surfaces of the pole piece and the permanent magnet in the same direction as the axial direction of the rotating shaft, and the space between the adjacent permanent magnet components is filled and solidified with resin. It is an eddy current type speed reducer.
【００１２】 この考案において、記磁極片と永久磁石との対向面間に回転軸の軸線方向と同 方向に貫通する通気路は、永久磁石構成体を構成する磁極片と永久磁石との対向 面の少なくともいずれか一方に凹部及び／又は凸部を形成し、これらが固定ボル トにて磁石支持リングに固定配置された時、接合面に実質的な空隙を形成すれば よく、形状も実施例に示すスリット状のものから、円形や楕円、小さな矩形状の ものを複数形成したり、種々の形状寸法のものが採用できる。 また、この考案の渦電流式減速装置において、永久磁石としては、公知の種々 の材料を使用することが可能であるが、特に最大エネルギー積が大きく（例えば 、４０ＭＧＯｅ以上）該装置の小型化を促進することができるが高温度で磁気特 性に影響を受けやすいＦｅ−Ｂ−Ｒ系永久磁石を使用したときに、この考案の効 果を有効に実現できる。In this invention, the air passage that penetrates between the facing surfaces of the magnetic pole piece and the permanent magnet in the same direction as the axial direction of the rotating shaft is defined by the facing surface of the magnetic pole piece and the permanent magnet forming the permanent magnet structure. It is sufficient to form a concave portion and / or a convex portion on at least one of the above, and when these are fixedly arranged on the magnet support ring by a fixed bolt, a substantial void is formed on the joint surface. It is possible to form a plurality of circular, elliptical, and small rectangular shapes from the slit shape shown in (1), or to adopt various shapes and sizes. In the eddy current type speed reducer of the present invention, various known materials can be used as the permanent magnet, but the maximum energy product is particularly large (for example, 40 MGOe or more), and the size of the device can be reduced. The effect of this invention can be effectively realized when an Fe-BR type permanent magnet that can be accelerated but is easily affected by magnetic properties at high temperature is used.
【００１３】[0013]
この考案による渦電流式減速装置は、例えば、永久磁石構成体を構成する磁極 片と永久磁石との対向面の少なくともいずれか一方に凹部及び／又は凸部を形成 し、これらが固定ボルトにて磁石支持リングに固定配置された時、接合面に実質 的な空隙を形成し、該空隙を回転軸の軸線方向と同方向に貫通する冷却風の通気 路とするもので、特に、隣接する永久磁石構成体間の凹部を樹脂にて充填するこ とによって、該凹部を通過する冷却風を遮断して前記通気路に集中させ、永久磁 石の磁極面を効率よく冷却することが可能となるのである。 従って、磁界発生源となる永久磁石の温度上昇を低減することができ、温度上 昇に伴う磁気特性の低下を防止し、しいては制動トルクの低下を防止することが 可能となる。 また、隣接する永久磁石構成体間の凹部に充填される樹脂は、固定ボルトとと もに永久磁石構成体の磁石支持リングへの固定配置の役目を有し、作動中の永久 磁石構成体の脱落防止を可能とする。 The eddy current type speed reducer according to the present invention has, for example, a concave portion and / or a convex portion formed on at least one of the facing surfaces of the magnetic pole piece and the permanent magnet constituting the permanent magnet structure, and these are fixed by a fixing bolt. When fixedly arranged on the magnet support ring, a substantial air gap is formed in the joint surface, and this air gap serves as a ventilation air passage for cooling air that penetrates in the same direction as the axis of the rotating shaft. By filling the recesses between the magnet constructs with resin, it is possible to block the cooling air passing through the recesses and concentrate them in the air passages, thereby efficiently cooling the magnetic pole surfaces of the permanent magnets. Of. Therefore, it is possible to reduce the temperature rise of the permanent magnet that is the magnetic field generation source, and it is possible to prevent the deterioration of the magnetic characteristics due to the temperature rise, and thus the braking torque. Further, the resin filled in the concave portion between the adjacent permanent magnet constituents has a role of fixing the permanent magnet constituents to the magnet supporting ring together with the fixing bolts, and the resin of the operating permanent magnet constituents is fixed. Enables fall prevention.
【００１４】[0014]
図１に示すこの考案の一実施例に基づいて、この考案の渦電流式減速装置の作 用を一層詳細に説明する。図１は、主として永久磁石構成体を拡大して図示した 部分縦断面説明図である。 図１において、５は磁極片６と永久磁石７とからなる永久磁石構成体であり、 固定ボルト９によって磁石支持リング８に固定配置されている。磁極片６の永久 磁石７との対向面には、その両側端部に図２に示すようなレール状の突起６ａを 形成している。 従って、磁極片６と永久磁石７とが固定ボルト９にて磁石支持リング８に固定 配置された状態では、磁極片６に形成されている突起６ａによって、互いの接合 面間に回転軸の軸線方向と同方向に貫通する冷却風の通気路１５を形成すること となる。 １６は、隣接する永久磁石構成体５間の凹部１４に充填される樹脂であり、永 久磁石構成体５を固定ボルト９にて磁石支持リング８に固定配置した後、充填固 化される。 Based on one embodiment of the present invention shown in FIG. 1, the operation of the eddy current type speed reducer of the present invention will be described in more detail. FIG. 1 is a partial vertical cross-sectional explanatory view mainly showing an enlarged view of a permanent magnet structure. In FIG. 1, reference numeral 5 denotes a permanent magnet structure including a pole piece 6 and a permanent magnet 7, which is fixedly arranged on a magnet support ring 8 by a fixing bolt 9. Rail-like protrusions 6a as shown in FIG. 2 are formed on both end portions of the surface of the pole piece 6 facing the permanent magnet 7. Therefore, when the magnetic pole piece 6 and the permanent magnet 7 are fixedly arranged on the magnet support ring 8 with the fixing bolt 9, the projection 6a formed on the magnetic pole piece 6 causes the axis line of the rotating shaft to be between the joint surfaces. A ventilation air passage 15 for cooling air that penetrates in the same direction is formed. Reference numeral 16 denotes a resin that is filled in the concave portions 14 between the adjacent permanent magnet constituents 5. After the permanent magnet constituents 5 are fixedly arranged on the magnet support ring 8 by the fixing bolts 9, the resin is filled and solidified.
【００１５】 磁極片６の永久磁石７との対向面に形成されるレール状の突起６ａに替えて、 図３に示すような該対向面の四隅にのみ突起６ｂを形成しても、同様な効果が得 られる。 図４に示すように永久磁石７側にレール状の突起７ａを形成する構成や、図５ に示すように磁極片６の中央部に円板状突起６ｃを形成する構成等、種々の構成 によって通気路１５を形成することができる。Even if the rail-shaped projections 6a formed on the surface of the pole piece 6 facing the permanent magnet 7 are replaced with the projections 6b only at the four corners of the facing surface as shown in FIG. The effect is obtained. There are various configurations such as a configuration in which a rail-shaped projection 7a is formed on the permanent magnet 7 side as shown in FIG. 4 and a configuration in which a disk-shaped projection 6c is formed in the central portion of the magnetic pole piece 6 as shown in FIG. The ventilation path 15 can be formed.
【００１６】 以上の構成では磁極片６又は永久磁石７の各々対向面の一方にのみ所定形状の 突起（凸部）を形成した例を示したが、両方の対向面に所定形状の突起（凸部） を形成したり、各々対向面に複数の回転軸の軸線方向と同方向に延長する溝（凹 部）を形成したりすることも可能であり、これら凹凸部の加工性等を考慮してそ の形成箇所や形状・寸法を選定することが望ましい。 いずれの構成においても、磁極片６と永久磁石７との対向面間に回転軸の軸線 方向と同方向に貫通する通気路１５が形成されるとともに、隣接する永久磁石構 成体５間の凹部１４を樹脂１６にて充填することによって、該凹部１４を通過す る冷却風を遮断して前記通気路１５に集中させ、永久磁石７の磁極面を効率よく 冷却することが可能となるのである。In the above configuration, an example in which a protrusion (projection) having a predetermined shape is formed on only one of the facing surfaces of the pole piece 6 or the permanent magnet 7 is shown, but a protrusion (projection) having a predetermined shape is formed on both of the facing surfaces. Part) or grooves (concave parts) that extend in the same direction as the axial direction of the plurality of rotating shafts can be formed on each of the facing surfaces. Considering the workability of these uneven parts, etc. It is desirable to select the location, shape and dimensions of the lever. In any of the configurations, a ventilation path 15 penetrating in the same direction as the axial direction of the rotating shaft is formed between the facing surfaces of the pole piece 6 and the permanent magnet 7, and the recess 14 between the adjacent permanent magnet structures 5 is formed. It is possible to efficiently cool the magnetic pole surface of the permanent magnet 7 by filling the resin 16 with the resin 16 so that the cooling air passing through the recess 14 is blocked and concentrated in the ventilation passage 15.
【００１７】 永久磁石構成体５間に充填される樹脂としては、１２０〜１３０℃程度の耐熱 性を有し、低膨張かつ高硬度を有する樹脂であればいずれのものも適用でき、例 えば耐熱性エポキシ系樹脂等の材料の使用が可能であり、充填に際しては、樹脂 が磁極片６の上面より突出してローター１（図６参照）の円滑な回転を妨げない ように注意することが必要である。As the resin filled between the permanent magnet structures 5, any resin can be applied as long as it has a heat resistance of about 120 to 130 ° C. and has a low expansion and a high hardness. It is possible to use a material such as a conductive epoxy resin, and it is necessary to take care when filling so that the resin does not protrude from the upper surface of the pole piece 6 and hinder the smooth rotation of the rotor 1 (see FIG. 6). is there.
【００１８】[0018]
この考案の渦電流式減速装置においては、磁極片の永久磁石との対向面間の通 気路にて、永久磁石構成体を構成する永久磁石の磁極面を効率よく冷却すること が可能となり、該永久磁石の温度上昇を低減することができ、温度上昇に伴う磁 気特性の低下を防止し、しいては制動トルクの低下を防止することが可能となる 。 また、隣接する永久磁石構成体間の凹部に充填される樹脂は、固定ボルトとと もに永久磁石構成体の磁石支持リングへの固定配置の役目を有し、作動中の永久 磁石構成体の脱落防止を可能とする。 In the eddy current type speed reducer of the present invention, it is possible to efficiently cool the magnetic pole surfaces of the permanent magnets constituting the permanent magnet structure in the air passage between the surfaces of the magnetic pole pieces facing the permanent magnets. It is possible to reduce the temperature rise of the permanent magnet, prevent the magnetic characteristics from deteriorating due to the temperature rise, and thus the braking torque. Further, the resin filled in the concave portion between the adjacent permanent magnet constituents has a role of fixing the permanent magnet constituents to the magnet supporting ring together with the fixing bolts, and the resin of the operating permanent magnet constituents is fixed. Enables fall prevention.
【図１】この考案の渦電流式減速装置に採用される永久
磁石構成体の一実施例を示す部分断面説明図である。FIG. 1 is a partial cross-sectional explanatory view showing an embodiment of a permanent magnet structure used in an eddy current type speed reducer of the present invention.
【図２】この考案の永久磁石構成体を構成する磁極片の
永久磁石対向面の一実施例を示す平面説明図である。FIG. 2 is an explanatory plan view showing an embodiment of a surface facing a permanent magnet of a magnetic pole piece constituting the permanent magnet structure of the present invention.
【図３】この考案の永久磁石構成体を構成する磁極片の
永久磁石対向面の他の実施例を示す平面説明図である。FIG. 3 is a plan view showing another embodiment of the permanent magnet facing surface of the pole piece constituting the permanent magnet structure of the present invention.
【図４】この考案の渦電流式減速装置に採用される永久
磁石構成体の他の実施例を示す部分断面説明図である。FIG. 4 is a partial sectional explanatory view showing another embodiment of the permanent magnet structure adopted in the eddy current type speed reducer of the present invention.
【図５】この考案の渦電流式減速装置に採用される永久
磁石構成体の他の実施例を示す部分断面説明図である。FIG. 5 is a partial cross-sectional explanatory view showing another embodiment of the permanent magnet structure adopted in the eddy current type speed reducer of the present invention.
【図６】この考案の対象とする渦電流式減速装置の概要
を示す部分断面説明図である。FIG. 6 is a partial cross-sectional explanatory view showing an outline of an eddy current type speed reducer to which the present invention is applied.
【図７】従来の永久磁石構成体を示す部分断面説明図で
ある。FIG. 7 is a partial cross-sectional explanatory view showing a conventional permanent magnet structure.
１ ローター ２ 回転軸 ３ 円筒部 ４ 冷却用フィン ５ 永久磁石構成体 ６ 磁極片 ６ａ，６ｂ 突起 ７ 永久磁石 ８ 磁石支持リング ９ 固定ボルト １０ ケーシング １１ エアーシリンダ １２ ピストンロッド １３ 案内部材 １４ 凹部 １５ 通気路 1 Rotor 2 Rotating Shaft 3 Cylindrical Part 4 Cooling Fin 5 Permanent Magnet Construct 6 Magnetic Pole Pieces 6a, 6b Protrusion 7 Permanent Magnet 8 Magnet Support Ring 9 Fixing Bolt 10 Casing 11 Air Cylinder 12 Piston Rod 13 Guide Member 14 Recess 15 Vent Path
Claims (1)
個の永久磁石構成体を互いに隣接する磁極面が異磁極と
なるよう固定ボルトにて環状に固定配置してなる磁石支
持リングと、回転軸の片側端部に嵌着し前記永久磁石構
成体の磁極面と所要空隙を形成して対向する渦電流発生
用円筒部を配置してなるローターとを有し、前記磁石支
持リングを介して永久磁石構成体を回転軸の軸線方向に
移動自在に配置し永久磁石構成体の磁極面と渦電流発生
用円筒部との対向面積を可変にした渦電流式減速装置に
おいて、前記磁極片と永久磁石との対向面間に回転軸の
軸線方向と同方向に貫通する通気路を形成するととも
に、隣接する永久磁石構成体間を樹脂にて充填固化した
ことを特徴とする渦電流式減速装置。1. A magnet support ring in which a plurality of permanent magnet constituents made up of permanent magnets having pole pieces arranged are fixedly arranged in an annular shape by fixing bolts so that adjacent magnetic pole surfaces have different magnetic poles, and a rotation. A rotor which is fitted to one end of the shaft and which has a magnetic pole surface of the permanent magnet forming body and a cavities for generating eddy currents which face each other to form a required gap. In the eddy current type speed reducer in which the permanent magnet structure is movably arranged in the axial direction of the rotating shaft and the facing area between the magnetic pole surface of the permanent magnet structure and the eddy current generating cylinder is variable, An eddy current type speed reducer, characterized in that a ventilation passage is formed between the surfaces facing the magnet in the same direction as the axis of the rotating shaft, and the space between adjacent permanent magnet constituents is filled and solidified with resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9225992U JPH0652386U (en) | 1992-12-22 | 1992-12-22 | Eddy current type speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9225992U JPH0652386U (en) | 1992-12-22 | 1992-12-22 | Eddy current type speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0652386U true JPH0652386U (en) | 1994-07-15 |
Family
ID=14049418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9225992U Pending JPH0652386U (en) | 1992-12-22 | 1992-12-22 | Eddy current type speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014039361A (en) * | 2012-08-13 | 2014-02-27 | Nippon Steel & Sumitomo Metal | Eddy current type reduction gear |
| KR20160089665A (en) * | 2015-01-20 | 2016-07-28 | 진 붕 신 | Power transmission device |
-
1992
- 1992-12-22 JP JP9225992U patent/JPH0652386U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014039361A (en) * | 2012-08-13 | 2014-02-27 | Nippon Steel & Sumitomo Metal | Eddy current type reduction gear |
| KR20160089665A (en) * | 2015-01-20 | 2016-07-28 | 진 붕 신 | Power transmission device |
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