JPS63101520A - Closed type rolling bearing - Google Patents
Closed type rolling bearingInfo
- Publication number
- JPS63101520A JPS63101520A JP62197277A JP19727787A JPS63101520A JP S63101520 A JPS63101520 A JP S63101520A JP 62197277 A JP62197277 A JP 62197277A JP 19727787 A JP19727787 A JP 19727787A JP S63101520 A JPS63101520 A JP S63101520A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- fixed
- bearing ring
- permanent magnet
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 21
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 26
- 230000005291 magnetic effect Effects 0.000 claims description 8
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000004519 grease Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/762—Sealings of ball or roller bearings by means of a fluid
- F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
- F16C33/765—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap by a magnetic field
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は軸受を密封するシール体に永久磁石部材を用
いた密封型ころがり軸受に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed rolling bearing in which a permanent magnet member is used as a seal body for sealing the bearing.
従来の密封型ころがり軸受は軸受内に封入したグリース
を外輪に固定した接触形のシール体または非接触形のシ
ール体によって密封していた。In conventional sealed rolling bearings, grease sealed within the bearing is sealed by a contact or non-contact seal fixed to the outer ring.
しかしながら前者にあってはシール体と軌道輪とが接触
しているのでトルクが高く、また後者にあってはグリー
スが漏れやすい等の欠点があった。However, in the former case, the torque is high because the seal body and the raceway are in contact with each other, and in the latter case, there are drawbacks such as easy grease leakage.
この発明は密封性能が良好であり、しかも低トルクでか
つコストが安価な密封型ころがり軸受を提供することを
目的とする。An object of the present invention is to provide a sealed rolling bearing that has good sealing performance, low torque, and is inexpensive.
次にこの発明の実施例を図面に基づいて説明する。第１
図は第一の実施例であって、密封型ころがり軸受は外輪
１と内輪２と転動体３と保持器４と外輪の両端側即ち一
方の軌道輪の両端側に固定された一対のシール体５゜６
とを備え、この外輪１および内輪２はいずれも強磁性体
の材料から成る。前記一対のシール体５．６はいずれも
断面が長方形状になっており、薫た一対のシール体５．
６はいずれも一方の軌道輪への固定部７．８がＮ極で内
輪への近傍部即ち他方の軌道輪への近傍部１１．１２が
Ｓ極の永久磁石である。従って一対のシール体５．６は
いずれも一方の軌道輪への固定部７．８と他方の軌道輪
への近傍５１１．１２とが異極の永久磁石部材であり、
また一方の側のシール体の一方の軌道輪への固定部７と
他方の側のシール体の−・方の軌道輪への固定部８とが
同極になっている。Next, embodiments of the present invention will be described based on the drawings. 1st
The figure shows a first embodiment, and the sealed rolling bearing includes an outer ring 1, an inner ring 2, rolling elements 3, a cage 4, and a pair of seal bodies fixed to both ends of the outer ring, that is, both ends of one raceway. 5゜6
The outer ring 1 and the inner ring 2 are both made of a ferromagnetic material. The pair of seal bodies 5.6 each have a rectangular cross section, and the pair of seal bodies 5.6 are fragrant.
6 is a permanent magnet in which the portion 7.8 fixed to one bearing ring has a north pole, and the portion 11.12 near the inner ring, that is, the portion 11.12 near the other bearing ring, has a south pole. Therefore, each of the pair of seal bodies 5.6 is a permanent magnet member in which the fixed portion 7.8 to one bearing ring and the vicinity 511.12 to the other bearing ring are of different polarity,
Further, the fixing portion 7 of the seal body on one side to one raceway ring and the fixing portion 8 of the seal body on the other side to the raceway race on the - side are of the same polarity.
前記他方の軌道輪のシール面１３．１４はいずれも円筒
状であり、一方の側のシール体の他方の軌道輪への近傍
部１１と一方のシール面１３との間の一方のシールすき
ま１５および他方の側のシール体の他方の軌道輪への近
傍部１２と他方のシール面１４との間の他方のシールす
きま１６に磁性流体がそれぞれ存在している。そして一
対のシール体５．６の間にはシールすきま１５．１６に
存在する磁性流体の溶媒と相溶性がなく、かつ磁性流体
でない潤滑剤が入れられている。前記一方の側のシール
体５の磁束は第１図に点線で示すように一方の側のシー
ル体５のＮ極から一方の軌道輪１、転動体３、および他
方の軌道輪２を通って一方の側のシール体５のＳ極に通
じ、また他方の側のシール体６の磁束は他方の側のシー
ル体６のＮ極から一方の軌道輪１、転動体３、および他
方の軌道輪２を通って他方の側のシール体６のＳ極に通
ずる。前記一対のシール体５．６の間に入れられた潤滑
剤は一方のシールすきま１５に存在する磁性流体および
他方のシールすきま１６に存在する磁性流体によって密
封されている。The sealing surfaces 13, 14 of said other raceway are both cylindrical, and there is one sealing gap 15 between the sealing body 11 of one side near the other raceway and the one sealing surface 13. The magnetic fluid is present in the other seal gap 16 between the seal body 12 on the other side near the other raceway and the other seal surface 14 . A lubricant that is not compatible with the solvent of the magnetic fluid existing in the seal gap 15.16 and is not a magnetic fluid is placed between the pair of seal bodies 5.6. The magnetic flux of the seal body 5 on one side flows from the N pole of the seal body 5 on one side through the raceway ring 1 on one side, the rolling element 3, and the raceway ring 2 on the other side, as shown by the dotted line in FIG. The magnetic flux of the seal body 6 on the other side passes from the N pole of the seal body 6 on the other side to the one raceway 1, the rolling elements 3, and the other raceway ring. 2 to the S pole of the seal body 6 on the other side. The lubricant placed between the pair of seal bodies 5.6 is sealed by the magnetic fluid present in the seal gap 15 on one side and the magnetic fluid present in the seal gap 16 on the other side.
第２図は第二の実施例であって第一の実施例の変形であ
るが、一対のシール体５．６はいずれも一方の軌道輪へ
の固定部７．８をシール体の内側面２１．２２の外周側
に有し、この一方の軌道輪への固定部７．８は軸受内側
に突出して一方の軌道輪ｌに接触している。前記一対の
シール体５．６はいずれも他方の軌道輪への近傍部１１
．１２をシール体の内側面２１．２２の内周側に有し、
この他方の軌道輪への近傍部１１．１２は軸受内側に突
出している。前記一対の゛シール体５．６はいずれも一
方の軌道輪への固定部７．８がＮ極で他方の軌道輪への
近傍部１１．１２がＳ極の永久磁石であり、一対のシー
ル体５．６はいずれも一方の軌道輪への固定部７．８と
他方の軌道輪への近傍部１１．１２とが異極の永久磁石
部材である。前記他方の軌道輪のシール面１３．１４は
いずれも他方の軌道輪２の側面と平行な平面状になって
おり、また他方の軌道輪への近傍部１１．１２と他方の
軌道輪のシール面１３．１４との間のシールすきま１５
．１６に磁性流体がそれぞれ存在している。FIG. 2 shows a second embodiment, which is a modification of the first embodiment, in which a pair of seal bodies 5.6 each have a fixing portion 7.8 to one raceway on the inner surface of the seal body. 21.22, and a fixing portion 7.8 to this one bearing ring protrudes inside the bearing and contacts one bearing ring l. Each of the pair of seal bodies 5.6 has a portion 11 adjacent to the other raceway.
．． 12 on the inner peripheral side of the inner surface 21.22 of the seal body,
The proximal part 11.12 to this other bearing ring projects inside the bearing. Each of the pair of seal bodies 5.6 is a permanent magnet with the part 7.8 fixed to one bearing ring having a north pole and the part 11.12 near the other bearing ring having a south pole. Each of the bodies 5.6 is a permanent magnetic member in which the fixed part 7.8 to one raceway and the adjacent part 11.12 to the other raceway have different polarities. The sealing surfaces 13.14 of the other raceway are both flat and parallel to the side surface of the other raceway 2, and the sealing surfaces 11.12 of the other raceway and the vicinity of the other raceway 2 are parallel to the side surface of the other raceway 2. Seal clearance 15 between surfaces 13 and 14
．． A magnetic fluid is present in 16, respectively.
このようにシール面１３．１４を平面状にすると、他方
の軌道輪２の側面と平行な面でシールしたいときに有効
である。Making the sealing surfaces 13 and 14 planar in this manner is effective when sealing is desired to be performed on a surface parallel to the side surface of the other raceway ring 2.
ｍ３図は第三の実施例であって第一の実施例の変形であ
るが、一対のシール体５，６はいずれも永久磁石３１．
３２と永久磁石の反固定部側の周面３３，３４に固定さ
れた強磁性体のヨーク３５．３６とからなり、このヨー
ク３５．３６が他方の軌道輪への近傍部１１．１２とな
っている。前記一対のシール体５，６はいずれも一方の
軌道輪への固定部７．８がＮ極で他方の軌道輪への近傍
部１１．１２がＳ極の永久磁石部材であり、また他方の
軌道輪のシール面１３．１４はいずれも他方の軌道輪２
の側面と平行な平面状に、なっている、そして他方の軌
道輪への近傍部１１．１２と他方の軌道輪のシール面１
３．１４との間のシールすきま１５．−１６に磁性流体
がそれぞれ存在している。。Figure m3 shows a third embodiment, which is a modification of the first embodiment, in which the pair of seal bodies 5 and 6 are both permanent magnets 31.
32 and a ferromagnetic yoke 35.36 fixed to the peripheral surfaces 33, 34 of the permanent magnet on the side opposite to the fixed part, and this yoke 35.36 serves as the vicinity part 11.12 to the other bearing ring. ing. The pair of seal bodies 5 and 6 are both permanent magnet members, with the part 7.8 fixed to one bearing ring being a north pole and the part 11.12 near the other bearing ring being a south pole. The sealing surfaces 13 and 14 of the bearing rings are both similar to the other bearing ring 2.
and the vicinity 11.12 of the other raceway and the sealing surface 1 of the other raceway.
3. Seal clearance between 14 and 15. -16 and magnetic fluid are present respectively. .
このようにヨーク３５．３６が他方の軌道輪への近傍部
１１．１２となっていると、他方の軌道輪への近傍部１
１．１２をテーパ状等にしてシールすきま１５．１６の
磁束密度を高めることができる。In this way, when the yokes 35, 36 are the proximal portions 11, 12 to the other bearing ring, the proximal portions 11, 12 to the other bearing ring are
1.12 can be made into a tapered shape or the like to increase the magnetic flux density in the seal gap 15.16.
第４図は第四の実施例であって第三の実施例の変形であ
るが、一方の側のシール体の一方の軌道輪への固定部７
と他方の側のシール体の一方の軌道輪への固定部８とが
異極になっている。FIG. 4 shows a fourth embodiment, which is a modification of the third embodiment, in which the fixing portion 7 of the seal body on one side is attached to one raceway ring.
and the portion 8 fixed to one raceway of the seal body on the other side are of different polarity.
第５図は第五の実施例であって第一の実施例の変形であ
るが、一対のシール体５．６はいずれも強磁性体のヨー
ク部材４１．４２と、該ヨーク部材の内側面４３．４４
の外周側に固定された一方の永久磁石４５．４６と、前
記ヨーク部材の内側面４３．４４の内周側に固定された
他方の永久磁石４７．４８とからなっている。前記一方
の永久磁石４５．４６および他方の永久磁石４７．４８
はいずれも両側面が異極となっており、また一方の永久
磁石４５．４６が−・方の軌道輪への固定部７．８とな
っていおり、他方の永久磁石４７．４８が他方の軌道輪
への近傍部１１．１２となっている。前記一対のシール
体５．６はいずれも一方の軌道輪への固定部７．８がＮ
極で他方の軌道輪への近傍部１１．１２がＳ極の永久磁
石部材であり、また他方の軌道輪のシール面１３．１４
はいずれも他方の軌道輪２の側面と平行な平面状になっ
ている。FIG. 5 shows a fifth embodiment, which is a modification of the first embodiment, in which a pair of sealing bodies 5.6 each include a ferromagnetic yoke member 41, 42 and an inner surface of the yoke member. 43.44
One permanent magnet 45.46 is fixed to the outer circumference of the yoke member, and the other permanent magnet 47.48 is fixed to the inner circumference of the inner surface 43.44 of the yoke member. The one permanent magnet 45.46 and the other permanent magnet 47.48
Both sides have different polarities, and one permanent magnet 45.46 serves as the fixed part 7.8 to the bearing ring on the - side, and the other permanent magnet 47.48 serves as the fixed part 7.8 on the other bearing ring. This is the vicinity portion 11.12 to the bearing ring. In each of the pair of seal bodies 5.6, the fixed portion 7.8 to one raceway is N.
The part 11.12 near the other bearing ring at the pole is a permanent magnetic member of the S pole, and the sealing surface 13.14 of the other bearing ring
Both have a planar shape parallel to the side surface of the other bearing ring 2.
そして他方の軌道輪への近傍部１１．１２と他方の軌道
輪のシール面１３．１４との間のシールすきま１５．１
６に磁性流体がそれぞれ存在している。and a sealing gap 15.1 between the vicinity 11.12 to the other raceway and the sealing surface 13.14 of the other raceway.
Magnetic fluid is present in 6 and 6, respectively.
このようにシール体５．６が一方の永久磁石４５．４６
と他方の永久磁石４７．４８とを備えていると、シール
すきま１５．１６の磁束密度がより高くなる。In this way, the seal body 5.6 is attached to one permanent magnet 45.46.
and the other permanent magnet 47.48, the magnetic flux density in the seal gap 15.16 becomes higher.
第６図は第六の実施例であって第五の実施例の変形であ
るが、一方の側のシール体の一方の軌道輪への固定部７
と他方の側のシール体の一方の軌道輪への固定部８とが
異極にな ′っている。FIG. 6 shows a sixth embodiment, which is a modification of the fifth embodiment, in which the fixing portion 7 of the seal body on one side is attached to one raceway ring.
and the portion 8 fixed to one raceway of the seal body on the other side are of different polarity.
なお図示されてはいないが他方の軌道輪のシール面１３
．１４に周みぞを設けると、シールすきま１５．１６の
磁束密度が高くなる。Although not shown, the sealing surface 13 of the other bearing ring
．． Providing a circumferential groove in 14 increases the magnetic flux density in the seal gaps 15 and 16.
またシール体５．６は一方の軌道輪への固定部７．８お
よび他方の軌道輪への近傍部１１．１２以外の個所が強
磁性体以外の材料で被覆されていると、シール体５．６
の強度が補強される。Further, if the seal body 5.6 is coated with a material other than a ferromagnetic material at a portion other than the fixed portion 7.8 to one raceway ring and the vicinity portion 11.12 to the other raceway ring, the seal body 5.6 .6
Strength is reinforced.
さらに図示の実施例ではシール体５．６を外輪ｌに固定
したが、シール体５．６を外輪ｌに固定しないで内輪２
に固定しても良い。Further, in the illustrated embodiment, the sealing body 5.6 is fixed to the outer ring l, but the sealing body 5.6 is not fixed to the outer ring l and the inner ring 2 is
It may be fixed to
また一対のシール体５．６の間に潤滑剤となっている磁
性流体を入れ、この一対のシール体５．６の間の磁性流
体と同一の磁性流体 ゛がシールすきま１５．１
６に存在するようにしても良い。In addition, a magnetic fluid serving as a lubricant is placed between the pair of seal bodies 5.6, and the same magnetic fluid as the magnetic fluid between the pair of seal bodies 5.6 has a seal clearance of 15.1.
6 may exist.
この発明の密封型ころがり軸受によると、シール体は一
方の軌道輪への固定部と他方の軌道輪への近傍部とが異
極の永久磁石部材であり、前記他方の軌道輪への近傍部
と他方の軌道輪のシール面との間のシールすきまに磁性
流体が存在しているので、一対のシール体の間に入れら
れた潤滑剤はシールすきまに存在する磁性流体によって
密封されており、密封性能が良好である。また一対のシ
ール体は他方の軌道輪に非接触なので低トルクとなって
いる。さらにシール体は一方の軌道輪への固定部と他方
の軌道輪への近傍部とが異極の永久磁石部材なので構造
が簡単であり、コストが安価である。また一対のシール
体は密封性能が良好なので粘度の低い潤滑剤を一対のシ
ール体の間に入れて使用でき、より低トルクの密封型こ
ろがり軸受にすることができるという効果を有する。According to the sealed rolling bearing of the present invention, the seal body is a permanent magnet member with a fixed part to one bearing ring and a part near the other bearing ring having different polarities, and a part near the other bearing ring is a permanent magnet member. Since a magnetic fluid exists in the seal gap between the bearing ring and the seal surface of the other bearing ring, the lubricant placed between the pair of seal bodies is sealed by the magnetic fluid present in the seal gap. Good sealing performance. Furthermore, since the pair of seal bodies does not contact the other raceway, the torque is low. Further, since the seal body is a permanent magnet member having a different polarity at the part fixed to one raceway and the part near the other raceway, the structure is simple and the cost is low. Further, since the pair of seal bodies has good sealing performance, a lubricant with low viscosity can be used between the pair of seal bodies, and this has the effect that a sealed rolling bearing with lower torque can be obtained.
第１図はこの発明の一実施例を示す密封型ころがり軸受
の断面図、第２図ないし第６図はこの発明の他の実施例
を示す密封型ころがり軸受の断面図である。
〔主要部分の符号の説明〕FIG. 1 is a sectional view of a sealed rolling bearing showing one embodiment of the invention, and FIGS. 2 to 6 are sectional views of sealed rolling bearings showing other embodiments of the invention. [Explanation of symbols of main parts]
Claims (1)
固定された一対のシール体を備えた密封型ころがり軸受
において、前記シール体は一方の軌道輪への固定部と他
方の軌道輪への近傍部とが異極の永久磁石部材であり、
前記他方の軌道輪への近傍部と他方の軌道輪のシール面
との間のシールすきまに磁性流体が存在しており、一方
の側のシール体の固定部と他方の側のシール体の固定部
とが異極になっていることを特徴とする密封型ころがり
軸受。 ２、シール体が永久磁石と永久磁石の反固定部側の周面
に固定された強磁性体のヨークとからなり、前記ヨーク
が他方の軌道輪への近傍部となっている特許請求の範囲
第１項記載の密封型ころがり軸受。 ３、シール体が強磁性体のヨーク部材と、該ヨーク部材
の内側面の外周側に固定された一方の永久磁石と、前記
ヨーク部材の内側面の内周側に固定された他方の永久磁
石とからなり、前記永久磁石は両側面が異極になってお
り、前記一方の永久磁石が一方の軌道輪への固定部とな
っており、前記他方の永久磁石が他方の軌道輪への近傍
部となっている特許請求の範囲第１項記載の密封型ころ
がり軸受。 ４、シール面が平面状である特許請求の範囲第１項記載
の密封型ころがり軸受。 ５、シール面が周みぞを有している特許請求の範囲第１
項記載の密封型ころがり軸受。 ６、シール体は一方の軌道輪への固定部および他方の軌
道輪への近傍部以外の個所が強磁性体以外の材料で被覆
されている特許請求の範囲第１項記載の密封型ころがり
軸受。[Scope of Claims] 1. In a sealed rolling bearing equipped with a pair of seal bodies fixed to both ends of either an outer ring or an inner race, the seal body is a fixed part to one raceway. and a portion near the other bearing ring are permanent magnetic members with different polarities,
A magnetic fluid exists in the seal gap between the vicinity of the other bearing ring and the sealing surface of the other bearing ring, and the fixing part of the seal body on one side and the seal body on the other side are fixed. A sealed rolling bearing characterized by having opposite polarities. 2. Claims in which the sealing body is composed of a permanent magnet and a ferromagnetic yoke fixed to the peripheral surface of the permanent magnet on the side opposite to the fixed part, and the yoke is a part near the other bearing ring. The sealed rolling bearing described in item 1. 3. A yoke member whose sealing body is a ferromagnetic material, one permanent magnet fixed to the outer circumferential side of the inner surface of the yoke member, and the other permanent magnet fixed to the inner circumferential side of the inner surface of the yoke member. The permanent magnet has opposite polarity on both sides, the one permanent magnet is fixed to one of the bearing rings, and the other permanent magnet is fixed to the other bearing ring. 1. A sealed rolling bearing as claimed in claim 1. 4. The sealed rolling bearing according to claim 1, wherein the sealing surface is planar. 5. Claim 1 in which the sealing surface has a circumferential groove
Sealed rolling bearings as described in section. 6. The sealed rolling bearing according to claim 1, wherein the seal body is coated with a material other than a ferromagnetic material at a portion other than a portion fixed to one bearing ring and a portion adjacent to the other bearing ring. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62197277A JPS63101520A (en) | 1987-08-08 | 1987-08-08 | Closed type rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62197277A JPS63101520A (en) | 1987-08-08 | 1987-08-08 | Closed type rolling bearing |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10834780A Division JPS5733222A (en) | 1980-08-08 | 1980-08-08 | Sealed antifriction bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63101520A true JPS63101520A (en) | 1988-05-06 |
| JPH0245047B2 JPH0245047B2 (en) | 1990-10-08 |
Family
ID=16371787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62197277A Granted JPS63101520A (en) | 1987-08-08 | 1987-08-08 | Closed type rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63101520A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012005202A1 (en) * | 2010-07-05 | 2012-01-12 | イーグル工業株式会社 | Rolling bearing |
| JP2012247041A (en) * | 2011-05-31 | 2012-12-13 | Globeride Inc | Bearing with magnetic fluid seal |
| WO2013069403A1 (en) | 2011-11-08 | 2013-05-16 | イーグル工業株式会社 | Sealing device using magnetic fluid |
| US8920035B2 (en) | 2010-07-05 | 2014-12-30 | Eagle Industry Co., Ltd. | Rolling bearing |
| US9022660B2 (en) | 2010-07-05 | 2015-05-05 | Eagle Industry Co., Ltd. | Rolling bearing |
| JP2015148345A (en) * | 2015-05-25 | 2015-08-20 | グローブライド株式会社 | Bearing with magnetic fluid seal |
| JP2015152096A (en) * | 2014-02-14 | 2015-08-24 | ミネベア株式会社 | Pivot assembly bearing device and magnetic head drive device using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821694U (en) * | 1971-07-16 | 1973-03-12 | ||
| JPS5594061A (en) * | 1978-12-11 | 1980-07-17 | Ezekiel Frederick D | Shaft sealing device using with magnetic liquid |
| JPS55110831U (en) * | 1979-01-31 | 1980-08-04 |
-
1987
- 1987-08-08 JP JP62197277A patent/JPS63101520A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821694U (en) * | 1971-07-16 | 1973-03-12 | ||
| JPS5594061A (en) * | 1978-12-11 | 1980-07-17 | Ezekiel Frederick D | Shaft sealing device using with magnetic liquid |
| JPS55110831U (en) * | 1979-01-31 | 1980-08-04 |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012005202A1 (en) * | 2010-07-05 | 2012-01-12 | イーグル工業株式会社 | Rolling bearing |
| US8585295B2 (en) | 2010-07-05 | 2013-11-19 | Eagle Industry Co., Ltd. | Rolling bearing |
| KR101415160B1 (en) * | 2010-07-05 | 2014-07-04 | 이구루코교 가부시기가이샤 | Rolling bearing |
| US8920035B2 (en) | 2010-07-05 | 2014-12-30 | Eagle Industry Co., Ltd. | Rolling bearing |
| US9022660B2 (en) | 2010-07-05 | 2015-05-05 | Eagle Industry Co., Ltd. | Rolling bearing |
| JP5745516B2 (en) * | 2010-07-05 | 2015-07-08 | イーグル工業株式会社 | Rolling bearing |
| JP2012247041A (en) * | 2011-05-31 | 2012-12-13 | Globeride Inc | Bearing with magnetic fluid seal |
| WO2013069403A1 (en) | 2011-11-08 | 2013-05-16 | イーグル工業株式会社 | Sealing device using magnetic fluid |
| CN103732934A (en) * | 2011-11-08 | 2014-04-16 | 伊格尔工业股份有限公司 | Sealing device using magnetic fluid |
| JP2015152096A (en) * | 2014-02-14 | 2015-08-24 | ミネベア株式会社 | Pivot assembly bearing device and magnetic head drive device using the same |
| JP2015148345A (en) * | 2015-05-25 | 2015-08-20 | グローブライド株式会社 | Bearing with magnetic fluid seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0245047B2 (en) | 1990-10-08 |
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