JPS62184237A - Magnetic-powder-type magnetic clutch and brake - Google Patents
Magnetic-powder-type magnetic clutch and brakeInfo
- Publication number
- JPS62184237A JPS62184237A JP2572986A JP2572986A JPS62184237A JP S62184237 A JPS62184237 A JP S62184237A JP 2572986 A JP2572986 A JP 2572986A JP 2572986 A JP2572986 A JP 2572986A JP S62184237 A JPS62184237 A JP S62184237A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- powder
- weight
- clutch
- spherical
- 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
- 239000006247 magnetic powder Substances 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 6
- 239000006249 magnetic particle Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 3
- 229910018523 Al—S Inorganic materials 0.000 claims 1
- 229910018125 Al-Si Inorganic materials 0.000 abstract description 3
- 229910018520 Al—Si Inorganic materials 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 description 12
- 239000000956 alloy Substances 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明者は、先に特願昭６０−１３０９００号「磁粉式
電磁クラッチおよびブレーキ」として磁性粉を改善する
ことによりトルク伝達力が高く、且つ、耐久性の良好な
磁粉式電磁クラッチおよび磁粉式電磁ブレーキについて
出願した。 本発明は、前記出願の磁性粉の改良に関す
る。Detailed Description of the Invention (Industrial Application Field) The present inventor previously published Japanese Patent Application No. 130900/1988 entitled "Magnetic Powder Type Electromagnetic Clutch and Brake" by improving magnetic powder to achieve high torque transmission power. In addition, an application was filed for a magnetic particle type electromagnetic clutch and a magnetic particle type electromagnetic brake that have good durability. The present invention relates to improvements in the magnetic powder of the aforementioned application.
（従来技術）
磁粉式電磁クラッチは、エンジンや電動機等の回転駆動
側部材と被回転駆動側部材とを間隙をもって対向させ、
その対向面間の間隙に連結用の磁性粉を介在させ、該磁
性粉を外磁場の作用により磁気的に結合させて動力を伝
達させるタイプの電磁クラッチである。(Prior art) A magnetic particle type electromagnetic clutch has a rotating driving side member such as an engine or an electric motor and a rotating driven side member facing each other with a gap.
This is a type of electromagnetic clutch in which coupling magnetic powder is interposed in the gap between the opposing surfaces, and the magnetic powder is magnetically coupled by the action of an external magnetic field to transmit power.
磁粉式電磁クラッチを説明する第１図において、駆動軸
ｌの先端部には内周に円筒面２を有する円筒状の駆動ク
ラッチ体３が形成され、被駆動軸４の先端部には外周に
円筒面５を有する被駆動クラッチ体６が形成されていて
、駆動クラッチ体３の円筒面２と被駆動クラッチ体６の
外周円筒面５とは円筒状間隙７をもって対向している。In FIG. 1 illustrating a magnetic particle type electromagnetic clutch, a cylindrical drive clutch body 3 having a cylindrical surface 2 on the inner periphery is formed at the tip of a drive shaft l, and a cylindrical drive clutch body 3 having a cylindrical surface 2 on the outer periphery is formed at the tip of the driven shaft 4. A driven clutch body 6 having a cylindrical surface 5 is formed, and the cylindrical surface 2 of the driving clutch body 3 and the outer circumferential cylindrical surface 5 of the driven clutch body 6 face each other with a cylindrical gap 7 therebetween.
駆動クラッチ体３の周囲にはｉ’！！磁石８が配設され
ていて。i'! around the drive clutch body 3. ! A magnet 8 is installed.
該電磁石に通電することにより駆動クラッチ体の円筒部
、被駆動クラッチ体の円筒部および間隙７を通して破線
９で示す経路に沿って磁束（磁界）が形成される。間隙
７内には磁性粉体が介在しており、該磁性粉体は空隙中
の磁界により磁化されて該間隙内で磁気的に固着され、
駆動クラッチ体３と被駆動クラッチ体６とを結合し駆動
側の回転トルクを被駆動側に伝達する。By energizing the electromagnet, a magnetic flux (magnetic field) is formed through the cylindrical portion of the driving clutch body, the cylindrical portion of the driven clutch body, and the gap 7 along a path shown by a broken line 9. A magnetic powder is interposed in the gap 7, and the magnetic powder is magnetized by the magnetic field in the gap and is magnetically fixed within the gap.
The driving clutch body 3 and the driven clutch body 6 are coupled to transmit rotational torque on the driving side to the driven side.
この種の磁粉式電磁クラッチでは、電磁石８に通電され
る電流を制御することができるので、トルクの伝達制御
が容易になされる特徴を有する。This type of magnetic particle type electromagnetic clutch has the feature that the electric current applied to the electromagnet 8 can be controlled, so that torque transmission can be easily controlled.
上記の磁粉式電磁クラッチにおいて、駆動クラッチ体３
と被駆動クラッチ体６との間隙に介在し、これらを結合
する連結用磁性粉は、同一強度の磁界中において、より
大きな磁気的結合力を生ずるものであることが大きいト
ルクを効率良く伝達させる上で望ましい、それ故、磁性
粉はより大きな磁束を通せること、即ち同一磁界中で発
生する磁束密度が大きいことが望ましく、また、電磁石
８への通電を止め外部磁界を消した状態で磁性粉が磁化
された状ｆルにあるとトルク切れが悪くなるので、可能
な限り保磁力の小さい磁性材料からなる粉末であること
が望ましい。In the magnetic particle type electromagnetic clutch described above, the drive clutch body 3
The connecting magnetic powder that is interposed in the gap between the driven clutch body 6 and the driven clutch body 6 and that connects them generates a larger magnetic coupling force in a magnetic field of the same strength, so that a large torque can be transmitted efficiently. Therefore, it is desirable that the magnetic powder should be able to pass a larger magnetic flux, that is, have a higher magnetic flux density generated in the same magnetic field. If the powder is in a magnetized state, it will be difficult to cut the torque, so it is desirable that the powder is made of a magnetic material with as small a coercive force as possible.
更に、この種の磁粉式電磁クラッチにおいては。Furthermore, in this type of magnetic particle type electromagnetic clutch.
駆動側と被駆動側の回転速度にズレがあり両者が相対的
に回転する状態で使用されることが多いが、このような
運転状態においては、駆動エネルギーの一部が、駆動ク
ラッチ体３と被駆動クラッチ体６との間の間隙７内での
磁性粉の相互摩擦による摩擦熱として消失され、磁性粉
に温度上昇をもたらし、磁性粉を酸化させ磁性粉の機械
的特性や磁気的特性を劣化させる。また、磁性粉は作動
空間においての衝突および摩擦を繰り返しているので、
摩耗によりあるいは破砕により微細化され特性が劣化し
てゆく。In many cases, the driving side and the driven side are used in a state where there is a discrepancy in rotational speed and the two rotate relative to each other. In such operating conditions, part of the driving energy is transferred to the driving clutch body 3. It is dissipated as frictional heat due to mutual friction between the magnetic powder and the driven clutch body 6 in the gap 7, causing a temperature rise in the magnetic powder, oxidizing the magnetic powder, and changing the mechanical and magnetic properties of the magnetic powder. deteriorate. In addition, since magnetic powder repeatedly collides and frictions in the working space,
It becomes finer due to wear or crushing, and its properties deteriorate.
それ故、磁粉式電磁クラッチに使用される磁性粉には、
クラッチの繰り返し使用による特性の劣化を防ぐために
、前記の磁気特性と同時に耐摩耗性や耐酸化性が良好で
あるとともに強靭性等の機械的特性の優れていることが
要求される。Therefore, the magnetic powder used in magnetic powder electromagnetic clutches is
In order to prevent the characteristics of the clutch from deteriorating due to repeated use, it is required that the clutch has good magnetic properties as well as wear resistance and oxidation resistance, as well as excellent mechanical properties such as toughness.
従来、磁性粉として１３重景％程度のＣｒを含有するＦ
ｅ−Ｃｒ系ステンレス合金でなる磁性粉を使用した磁粉
式電磁クラッチが提案されているが、磁性粉の磁気特性
、耐熱耐酸化特性、耐摩耗性あるいは強靭性等の特性を
改善した磁粉式電磁クラッチの提案が望まれていた。そ
こで特願昭６０−１３０９００号においては、磁性粉と
して、Ｓｉ：１〜８重量％、Ａｌ：３〜８重量％、但し
、ＳｉとＡｔの合計量を５〜１２重量％の範囲とし、残
部が実質的にＦｅからなり、軟磁性、耐酸化性、および
耐摩耗特性の良好なＦ ｅ −Ａ ｌ −Ｓ ｉ系の磁
性粉を用いることでトルク値が高く、しかも耐久性やト
ルク切れの優れた電磁クラッチおよびブレーキが得られ
ることを提案した。Conventionally, F containing about 13% Cr as magnetic powder
A magnetic particle type electromagnetic clutch using magnetic powder made of e-Cr stainless alloy has been proposed, but a magnetic particle type electromagnetic clutch that uses magnetic powder with improved magnetic properties, heat resistance, oxidation resistance, wear resistance, or toughness has been proposed. Clutch proposals were desired. Therefore, in Japanese Patent Application No. 60-130900, as magnetic powder, Si: 1 to 8% by weight, Al: 3 to 8% by weight, but the total amount of Si and At is in the range of 5 to 12% by weight, and the balance is By using Fe-Al-Si type magnetic powder, which is essentially made of Fe and has good soft magnetism, oxidation resistance, and wear resistance, it has a high torque value, and has excellent durability and resistance to torque breakage. It is proposed that excellent electromagnetic clutches and brakes can be obtained.
（発明の目的）
本発明は、Ｆｅ−Ａｌ−３ｉ系磁性合金粉末の組成、形
状および寸法につき特に良好な範囲に特定することによ
り動力伝達時のトルク変動値の小さい磁粉式電磁クラッ
チおよびブレーキを提供することを目的とする６
（発明の構成）
本発明は、軟質磁性材料からなる回転駆動側部材と被回
転駆動側部材とを間隙をもって対向させ、該間隙に磁界
を形成して該間隙に介在する磁性粉を磁化させることに
より、前記回転駆動側部材と被回転駆動側部材とを磁性
粉によって結合させることにより、駆動側のトルクを被
駆動側に伝達ささせる磁粉式電磁クラッチおよびブレー
キにおいて前記磁性粉として、Ｓｉ：１〜８重量％、へ
１：１〜８重量％、但し、ＳｉとＡｔの合計量が５〜１
２重量％の範囲とし、残部が実質的にＦｅからなるＦｅ
−Ａｌ−５ｉ系合金粉末を使用し、粉末の形状を球状あ
るいは種球状とし、且つ、粒径を電磁クラッチの間隙の
１／６以下としたＦｅ−Ａｌ−Ｓｉ系合金粉末を使用し
ている磁粉式電磁クラッチおよび磁粉式電磁ブレーキに
係る。(Objective of the Invention) The present invention provides magnetic powder type electromagnetic clutches and brakes with small torque fluctuations during power transmission by specifying the composition, shape, and dimensions of Fe-Al-3i magnetic alloy powder within particularly favorable ranges. Object of the Invention 6 (Structure of the Invention) The present invention has a rotating drive side member and a rotationally driven side member made of a soft magnetic material facing each other with a gap therebetween, and forming a magnetic field in the gap to form a magnetic field in the gap. A magnetic particle type electromagnetic clutch and brake that transmits torque on the driving side to the driven side by magnetizing intervening magnetic powder and coupling the rotational driving side member and the rotationally driven side member with the magnetic powder. As the magnetic powder, Si: 1 to 8% by weight, Si: 1 to 8% by weight, provided that the total amount of Si and At is 5 to 1% by weight.
Fe in the range of 2% by weight, with the remainder consisting essentially of Fe.
- Fe-Al-Si alloy powder is used that uses Al-5i alloy powder, the powder shape is spherical or seed spherical, and the particle size is 1/6 or less of the gap of the electromagnetic clutch. Pertains to magnetic particle electromagnetic clutches and magnetic particle electromagnetic brakes.
ここで、ＳｉおよびＡｌは合金粉末の硬度を高くし、耐
摩耗性を向上させ、耐酸化性を改善させるとともに磁気
的特性を改善する上で必要な合金成分である。しかしな
がら、Ｓｉ含有量が１重量％未満ではその効果が充分で
なく、８重量％を超えて多量に含有させると粉末を脆弱
にする。Here, Si and Al are alloy components necessary to increase the hardness of the alloy powder, improve wear resistance, improve oxidation resistance, and improve magnetic properties. However, if the Si content is less than 1% by weight, the effect is not sufficient, and if it is contained in a large amount exceeding 8% by weight, the powder becomes brittle.
また、アルミニューム含有量が１重量％未満では、特に
粉末の耐酸化特性改善効果が充分でなく、８重量％を超
えて多量に含有させると粉末を脆弱にする。従って本発
明ではＳｉの含有量を１〜８重量％の範囲、特に望まし
くは３〜７重量％の範囲とし、Ａｌの含有量を１〜８重
量％、特に望ましくは２〜４重量％の範囲とし、望まし
くは（Ｓｉ＋Ａｌ）＞５重量％とすると良い。但し、Ｓ
ｉとＡｌの合計を１２重量％を超えて多量にすると。Furthermore, if the aluminum content is less than 1% by weight, the effect of improving the oxidation resistance of the powder is not sufficient, and if it is contained in a large amount exceeding 8% by weight, the powder becomes brittle. Therefore, in the present invention, the Si content is set in the range of 1 to 8% by weight, particularly preferably in the range of 3 to 7% by weight, and the Al content is set in the range of 1 to 8% by weight, particularly preferably in the range of 2 to 4% by weight. It is preferable that (Si+Al)>5% by weight. However, S
When the total amount of i and Al exceeds 12% by weight.
合金粉末の飽和磁束密度が低下して所望のトルク伝達力
が得られなくなるので、（Ｓｉ＋ＡＩ）＜１２重量％と
することが必要である。望ましくは（Ｓｉ＋Ａｌ）＜１
０重量％とすると良い。Since the saturation magnetic flux density of the alloy powder decreases and the desired torque transmission force cannot be obtained, it is necessary to set (Si+AI)<12% by weight. Preferably (Si+Al)<1
It is preferable to set it to 0% by weight.
更に一層の特性向上を試み、特願昭６０−１３０．９０
０号の優れた特性に加えて、特に作動時のトルク値変動
の極めて小さい安定した電磁クラッチおよびブレーキを
提供するために磁性粉末の形状および寸法に検討を加え
て良好な結果が得られた。In an attempt to further improve the characteristics, a patent application was filed on 1986-130.90.
In addition to the excellent properties of No. 0, good results were obtained by examining the shape and dimensions of the magnetic powder in order to provide stable electromagnetic clutches and brakes with extremely small fluctuations in torque values during operation.
磁粉式電磁クラッチおよび磁粉式電磁ブレーキの場合動
力の伝達に磁性粉末の磁気的な結合力を使用するので、
微視的に見れば不連続的な結合力であり、多少のトルク
変動を生じることは原理的に避けられない。然しながら
、動力の伝達ができるだけ円滑に行われるためには、そ
の様な出力側のトルク値の変動が極めて小さいことが望
まれる。In the case of magnetic particle electromagnetic clutches and magnetic particle electromagnetic brakes, the magnetic binding force of magnetic powder is used to transmit power, so
Microscopically, it is a discontinuous bonding force, and it is in principle inevitable that some torque fluctuation will occur. However, in order to transmit power as smoothly as possible, it is desirable that such fluctuations in the torque value on the output side be extremely small.
トルク値の変動が特に大きい場合、動力伝達時に駆動軸
や被駆動軸の破損等の重大事故が発生する恐れがある。If the fluctuation in torque value is particularly large, there is a risk that serious accidents such as damage to the drive shaft or driven shaft may occur during power transmission.
従って、磁粉式電磁クラッチの場合には、その対応が特
に必要になる。Therefore, in the case of a magnetic particle type electromagnetic clutch, it is especially necessary to take appropriate measures.
本発明者の詳細な実験によれば、この様なトルク値の変
動の大小は、使用する磁性粉の材料の種類やその形状お
よび寸法に大きく依存する。電磁クラッチの動力伝達力
を高める為には、空隙の間隔を狭くして磁界を強め介在
する磁性粉末中を流れる磁束を高めることは有効である
。然しながら、この様な場合には特にトルクの変動に対
しては敏感となる。According to detailed experiments conducted by the present inventors, the magnitude of such fluctuations in torque values largely depends on the type of magnetic powder material used and its shape and dimensions. In order to increase the power transmission force of the electromagnetic clutch, it is effective to narrow the space between the gaps to strengthen the magnetic field and increase the magnetic flux flowing through the intervening magnetic powder. However, in such a case, it is particularly sensitive to torque fluctuations.
本発明では、使用する磁性粉末を所望の形状および寸法
に制御することでこの問題を解決した。The present invention solves this problem by controlling the magnetic powder used to have a desired shape and size.
先ず使用するＦｅ−Ａｌ−３ｉ系磁性粉末の形状につい
ては第３図のように球形、または種球形のものを使用す
る。 その粒径（ｄ）については使用する電磁クラッチ
の空隙の間隔（Ｄ）が重要であり、ｄ＜１／６ Ｄ以
下で使用することが必要である。形状が球形でない、例
えば、板状や棒状粉末体や球形でも使用する粉末の粒径
がｄ＜１／６ Ｄより大きい粉末体であると電磁クラ
ッチのトルク値変動の小さいものは得られない、但し、
粒径についてはあまり細粉化されると軟磁性が劣り、透
磁率が低く、保磁力が大きくなり、出力トルク値が低下
しトルク切れが悪くなるので１０μｍ以上で使用するこ
とが望ましい。First, the shape of the Fe-Al-3i magnetic powder used is spherical or seed spherical as shown in FIG. Regarding the particle size (d), the gap distance (D) of the electromagnetic clutch used is important, and it is necessary to use it at d<1/6 D or less. If the shape is not spherical, for example, a plate-shaped or rod-shaped powder, or a spherical powder, but the particle size of the powder used is larger than d < 1/6 D, it will not be possible to obtain a small torque value fluctuation of the electromagnetic clutch. however,
Regarding the particle size, it is desirable to use a particle size of 10 μm or more because if the particle size is too fine, the soft magnetic properties will be poor, the magnetic permeability will be low, and the coercive force will be large, the output torque value will decrease, and the torque cutting will be poor.
（実施例）
本発明に係るＦ ｅ −Ａ ｌ −Ｓ ｉ系磁性合金粉
末組成の実施例であるＳｉニア重量％、Ａｌ：２重量％
、残部が実質的にＦｅからなり粉末の形状が球状の合金
試料Ａ−１、Ｓｉ：５重量％、Ａｌ：３．５重量％、残
部が実質的にＦｅからなり粉末の形状が擬球状の合金試
料Ａ−２とＳｉ：５重量％、Ａｌ：３．５重量％、残部
が実質的にＦｅからなり粉末の形状が板状の合金試料Ｂ
と、Ｃｒ：１３重量％、残部が実質的にＦｅからなる粉
末の形状が擬球状の合金試料Ｃについて特性の比較をし
た結果を第１表に示す、 第１表の各合金組成の粉末試
料を磁粉式電磁クラッチに実際に使用し九場合の耐久テ
スト結果を第２表に示す、尚、粉末の粒径は２０〜８０
μｍで重量はそれぞれ一定量で比較した。また、空隙の
間隔は１１ｍであろた。(Example) An example of the Fe-A1-Si magnetic alloy powder composition according to the present invention, Si near weight %, Al: 2 weight %
, alloy sample A-1 in which the remainder was substantially Fe and the powder shape was spherical, Si: 5% by weight, Al: 3.5% by weight, the remainder was substantially Fe and the powder shape was pseudospherical. Alloy sample A-2 and alloy sample B, which consists of Si: 5% by weight, Al: 3.5% by weight, and the remainder is substantially Fe, and the powder is plate-shaped.
Table 1 shows the results of comparing the properties of alloy sample C, which has a pseudospherical powder shape, consisting of 13% by weight of Cr and the balance being substantially Fe. Powder samples of each alloy composition in Table 1 Table 2 shows the durability test results of 9 cases in which the powder was actually used in a magnetic powder electromagnetic clutch.The particle size of the powder was 20 to 80.
The weights in μm were compared using constant amounts. Further, the interval between the voids was 11 m.
第１表
注：磁束密度は５０ｏｏｒｓｔｅｄの磁界中の値第２表
第２図は電磁クラッチの電磁石の電流値を一定にして、
被駆動軸側のトルク値の時間的な変動を記録したもので
ある。この発明の磁性粉を用いた場合の出力トルク値の
変動が極めて小さく安定していることがわかる。 これ
に比べて従来の１３％Ｃｒ−Ｆｅや粉末の形状が板状の
磁性粉はトルク値の変動が大きい。Table 1 Note: Magnetic flux density is the value in a 50 oorsted magnetic field Table 2 Figure 2 shows the value when the current value of the electromagnet of the electromagnetic clutch is constant.
This is a record of temporal fluctuations in the torque value on the driven shaft side. It can be seen that fluctuations in the output torque value when using the magnetic powder of the present invention are extremely small and stable. Compared to this, conventional 13% Cr-Fe and magnetic powders having a plate-like powder shape have large fluctuations in torque value.
（発明の効果）
本発明に使用されるＦｅ−ＡｌＳｉ系磁性粉末合金は、
Ｃｒ含有合金磁性粉末等の従来提案のものに比較して耐
久性に優れ、更に出力トルク値の変動が極めて小さく且
つ安定し、動力駆動のムラのできるだけ小さい電磁クラ
ッチを提供し、この種の゛電磁クラッチの実用的価値を
高め大巾な普及を可能にするものであり工業的価値は大
である。(Effect of the invention) The Fe-AlSi magnetic powder alloy used in the present invention is
We provide an electromagnetic clutch that has superior durability compared to conventionally proposed products such as Cr-containing alloy magnetic powder, has extremely small and stable fluctuations in output torque value, and has as little unevenness in power drive as possible. It increases the practical value of electromagnetic clutches and enables their widespread use, and has great industrial value.
尚、以上は主に磁粉式電磁クラッチに関して述べたが、
本発明は基本的作動原理を磁粉式電磁クラッチと同じく
する磁粉式電磁ブレーキおよびＯＡ機器に使用される磁
粉式電磁トルクリミッタ−にもそのまま適用されるもの
であり、従って本発明は磁粉式電磁ブレーキおよび磁粉
式電磁トルクリミッタ−をも発明の範囲に包含するもの
である。Although the above has mainly concerned the magnetic particle type electromagnetic clutch,
The present invention is directly applicable to magnetic particle type electromagnetic brakes, which have the same basic operating principle as magnetic particle type electromagnetic clutches, and magnetic particle type electromagnetic torque limiters used in OA equipment. Also included within the scope of the invention are magnetic powder type electromagnetic torque limiters.
【図面の簡単な説明】
第１図・・・・・・本発明の磁粉式電磁クラッチを説明
する電磁クラッチの断面図
図中＝１・・・駆動軸
２・・・駆動クラッチ体の円筒面
３・・・駆動クラッチ体
４・・・被駆動軸
５・・・被駆動クラッチ体の円筒面
６・・・被駆動クラッチ体
７・・・円筒状間隙
８・・・電磁石
第２図・・・・・・本発明品と従来品のトルク変動値の
比較
第３図・・・・・・本発明に関するＦ ｅ −Ａ Ｉ
−Ｓ ｉ系の球状または種球状磁性合金粉末の
形状を示す倍率２００倍の顕微鏡写
真[Brief Description of the Drawings] Fig. 1...Cross-sectional view of an electromagnetic clutch illustrating the magnetic particle type electromagnetic clutch of the present invention =1...Drive shaft 2...Cylindrical surface of drive clutch body 3... Drive clutch body 4... Driven shaft 5... Cylindrical surface of driven clutch body 6... Driven clutch body 7... Cylindrical gap 8... Electromagnet Fig. 2... ... Comparison of torque fluctuation values between the product of the present invention and the conventional product Fig. 3 ...F e -A I related to the present invention
-Micrograph at 200x magnification showing the shape of Si-based spherical or seed spherical magnetic alloy powder
Claims (1)
部材とを間隙をもって対向させ、該間隙に磁界を形成し
て該間隙に介在する磁性粉を磁化させることにより前記
回転駆動側部材と被回転駆動側部材とを前記磁性粉によ
って結合して駆動側のトルクを被駆動側に伝達させる磁
粉式電磁クラッチおよび磁粉式電磁ブレーキにおいて、
前記磁性粉として、Ｓｉ：１〜８重量％、Ａｌ：１〜８
重量％、但し、ＳｉとＡｌの合計量を５〜１２重量％の
範囲とし、残部が実質的にＦｅからなるＦｅ−Ａｌ−Ｓ
ｉ系磁性合金粉末を使用し、粉末の形状を球形あるいは
擬球形とし、且つ、粒径を電磁クラッチの間隙の１／６
以下としたことを特徴とする磁粉式電磁クラッチおよび
ブレーキ。A rotary driving side member and a rotatably driven side member made of a soft magnetic material are opposed to each other with a gap therebetween, and a magnetic field is formed in the gap to magnetize the magnetic powder present in the gap. A magnetic particle type electromagnetic clutch and a magnetic particle type electromagnetic brake that connect the driving side member with the magnetic powder to transmit the torque of the driving side to the driven side,
As the magnetic powder, Si: 1 to 8% by weight, Al: 1 to 8% by weight.
% by weight, provided that the total amount of Si and Al is in the range of 5 to 12% by weight, and the balance is substantially Fe-Al-S
Using i-based magnetic alloy powder, the shape of the powder is spherical or pseudo-spherical, and the particle size is 1/6 of the gap of the electromagnetic clutch.
A magnetic particle type electromagnetic clutch and brake characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2572986A JPS62184237A (en) | 1986-02-10 | 1986-02-10 | Magnetic-powder-type magnetic clutch and brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2572986A JPS62184237A (en) | 1986-02-10 | 1986-02-10 | Magnetic-powder-type magnetic clutch and brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62184237A true JPS62184237A (en) | 1987-08-12 |
Family
ID=12173892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2572986A Pending JPS62184237A (en) | 1986-02-10 | 1986-02-10 | Magnetic-powder-type magnetic clutch and brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62184237A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730527A (en) * | 2012-07-11 | 2012-10-17 | 福建省特种设备检验研究院 | Magnetorheological elevator traction drive device |
-
1986
- 1986-02-10 JP JP2572986A patent/JPS62184237A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730527A (en) * | 2012-07-11 | 2012-10-17 | 福建省特种设备检验研究院 | Magnetorheological elevator traction drive device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4957644A (en) | Magnetically controllable couplings containing ferrofluids | |
| US5354488A (en) | Fluid responsive to a magnetic field | |
| US5988336A (en) | Clutch with electrorheological or magnetorheological liquid pushed through an electrode or magnet gap by means of a surface acting as a piston | |
| US5549837A (en) | Magnetic fluid-based magnetorheological fluids | |
| JP3280032B2 (en) | Method for increasing power of magnetorheological fluid device and magnetorheological fluid composition | |
| US4849120A (en) | Magnetically controllable couplings containing ferrafluids | |
| CN205190570U (en) | Nanometer magnetic current becomes fluid clutch | |
| JPS6283401A (en) | Magnetic powder for electromagnetic clutch and brake and its production | |
| JPS62184237A (en) | Magnetic-powder-type magnetic clutch and brake | |
| US2804955A (en) | Magnetic fluid mixture coupling | |
| JPS61290238A (en) | Magnetic powder type electromagnetic clutch and brake | |
| CA3093905C (en) | Bistable brake | |
| GB2026540A (en) | Friction linings | |
| US2809731A (en) | Magnetic particle coupling device with nickel-coated iron particles | |
| CN109300641B (en) | Soft magnetic alloy magnetic powder for electromagnetic transmission device | |
| CN109027057A (en) | A kind of vehicle magnetic rheological brake | |
| JPS61175329A (en) | Magnetic powder for electromagnetic clutch | |
| CN214304957U (en) | Double-coil side-arranged multilayer magneto-rheological brake | |
| JP4215016B2 (en) | Ferromagnetic powder and powder clutch or powder brake using the same | |
| CN101266861A (en) | A magneto-rheological liquid without sediment | |
| JPS63105902A (en) | Magnetic powder for magnetic powder type power transmission device | |
| US5211766A (en) | Anisotropic neodymium-iron-boron permanent magnets formed at reduced hot working temperatures | |
| JPS59197549A (en) | Fe-base sintered alloy for armature of electromagnetic coupling apparatus | |
| KR102564042B1 (en) | High performance magnetorheological fluids having magnetic anisotropic particle and preparation method threreof | |
| US7172059B2 (en) | Electromagnetic coupling |