JPH0690544A - Sealing device for rotary shaft of motor - Google Patents
Sealing device for rotary shaft of motorInfo
- Publication number
- JPH0690544A JPH0690544A JP23676392A JP23676392A JPH0690544A JP H0690544 A JPH0690544 A JP H0690544A JP 23676392 A JP23676392 A JP 23676392A JP 23676392 A JP23676392 A JP 23676392A JP H0690544 A JPH0690544 A JP H0690544A
- Authority
- JP
- Japan
- Prior art keywords
- ball bearing
- motor
- rotary shaft
- seal type
- type ball
- 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
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はモータの回転軸密閉装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft sealing device for a motor.
【０００２】[0002]
【従来の技術】従来、モータの回転軸密閉装置には接触
型のオイルシールやメカニカルシールや、非接触型のク
リアランスシールやラビリンスシール等が用いられてき
た。2. Description of the Related Art Conventionally, contact type oil seals and mechanical seals, non-contact type clearance seals and labyrinth seals have been used in rotary shaft sealing devices for motors.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、モータ
軸を貫通する穴を有する構造のモータに従来のシール方
法を用いる場合、次のような問題を有する。すなわち、
モータのセンサー部分を密閉、保護するために従来の接
触型のオイルシールを用いる場合、軸の面粗さ、軸の硬
さ、ケースのそのものの変更や組立精度が必要であり、
コストアップとなり、磨耗による寿命、摩擦トルクによ
る損失が大きい等の問題がある。このオイルシール法の
問題点を解決できる手段としてＶリングを用いる方法が
あるが、回転軸の周速が規定以上達すればリップが浮き
磨耗による寿命や摩擦トルクによる損失等の問題は解決
できるが、通常のモータの使用域では規定以下となり、
Ｖリングのメリットを生かせない。一方、非接触型のク
リアランスシールやラビリンスシールはコンタミネーシ
ョンによる汚れはないが、耐圧、漏れ量、機械的精度保
持など仕様条件にかなりの規約があるため、モータセン
サー部分の密閉には不向きである。また、ボールベアリ
ングをケースに設けることでボールベアリングによりシ
ールすることが考えられるが、モータ部の２ヶ所とケー
ス部の３点支持となるため、ボールベアリングの組み立
て誤差によるコジレ等の影響大のため、組立精度をアッ
プする等、構造上大幅に変更する必要がある。However, when the conventional sealing method is used for a motor having a structure having a hole penetrating the motor shaft, the following problems occur. That is,
When using a conventional contact type oil seal to seal and protect the sensor part of the motor, it is necessary to change the surface roughness of the shaft, the hardness of the shaft, the case itself and the assembly accuracy,
There are problems such as increased cost, long life due to wear, and large loss due to friction torque. There is a method of using a V ring as a means for solving the problems of the oil seal method, but if the peripheral speed of the rotating shaft reaches a specified value or more, problems such as life due to wear of the lip and loss due to friction torque can be solved, In the normal motor usage range, it will be less than specified,
Do not take advantage of the V-ring. On the other hand, non-contact type clearance seals and labyrinth seals are not contaminated due to contamination, but they are not suitable for sealing the motor sensor part because there are considerable agreements on the specification conditions such as pressure resistance, leakage amount and mechanical accuracy retention. . In addition, it is possible to seal by using the ball bearing by providing the ball bearing in the case. However, since two points of the motor section and three points of the case section are supported, there is a large influence of bending and the like due to an assembly error of the ball bearing. , It is necessary to drastically change the structure, such as improving the assembly accuracy.
【０００４】本発明は、本構成のモータに対し構造を大
幅に変更することもなく、低コストのモータの回転軸密
閉装置を提供するものである。The present invention provides a low-cost rotary shaft sealing device for a motor without significantly changing the structure of the motor having this structure.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記従来の課
題を解決するために、センサー部のケースとモータ軸と
の間の隙間を密閉するために、回転軸に固定されたシー
ル型ボールベアリングと、このシール型ボールベアリン
グとセンサー部のケースの間をシール型ボールベアリン
グの外輪に取り付けてあるゴムなどの樹脂で密閉する。
あるいは、シール型ボールベアリングの外輪をセンサー
部のケースに固定させ、シール型ボールベアリングの内
輪と回転軸との間をゴム等の樹脂を取り付けて回転軸と
の間を密閉する構成としたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a seal-type ball fixed to a rotating shaft to seal a gap between a case of a sensor section and a motor shaft. The bearing and the space between the sealed ball bearing and the case of the sensor unit are sealed with a resin such as rubber attached to the outer ring of the sealed ball bearing.
Alternatively, the outer ring of the sealed ball bearing is fixed to the sensor case, and a resin such as rubber is attached between the inner ring of the sealed ball bearing and the rotary shaft to seal the rotary shaft. is there.
【０００６】[0006]
【作用】このような構成によって、シール型ボールベア
リングの外輪と内輪は、ゴム等の樹脂で軸またはケース
の間で密閉され、各々がカバーおよび回転軸と一緒に回
転することになる。たとえば、シール型ボールベアリン
グの取付が少々偏心していたり、ケースの面に傾きがあ
ったとしても、ゴムの変形により吸収できるので、密封
性は損なわれない。さらに、ボールベアリング自体もシ
ール型を用いることによりシールが可能である。またゴ
ム等の緊迫力でシール型ボールベアリングに予圧がかか
るので、ベアリングの振動、騒音も抑えることができ
る。もちろん、摩擦部がないので低トルク、低損失であ
る。With such a structure, the outer race and the inner race of the seal type ball bearing are sealed with a resin such as rubber between the shaft or the case, and each rotates together with the cover and the rotary shaft. For example, even if the mounting of the seal type ball bearing is slightly eccentric or the surface of the case is tilted, it can be absorbed by the deformation of the rubber, so the sealing performance is not impaired. Further, the ball bearing itself can be sealed by using a seal type. Further, since the seal type ball bearing is preloaded by the tension force of rubber or the like, the vibration and noise of the bearing can be suppressed. Of course, since there is no friction part, it has low torque and low loss.
【０００７】[0007]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００８】図１にモータ全体の概略構造図を示す。モ
ータにはセンサー部２を有し、そのセンサー部２と外気
とを密閉するために図２に示すような密閉装置を有す
る。図２に示すように、回転軸３にシール型ボールベア
リング５が固定されており、このシール型ボールベアリ
ング５は回転軸方向に動かないように圧入、焼ばめ、接
着等で固定されている。このシール型ボールベアリング
の外輪５ｂとセンサー部のケース４とをゴム等の樹脂６
で密閉する。回転軸３とシール型ボールベアリングの内
輪５ａは固定されており、シール型ボールベアリングの
内輪５ａが回転しても、シール型ボールベアリングの外
輪５ｂはセンサー部のケース４に接触したゴム等の樹脂
６で固定されているため、シール型ボールベアリングの
外輪５ｂは回転しない。FIG. 1 shows a schematic structural diagram of the entire motor. The motor has a sensor portion 2 and a sealing device as shown in FIG. 2 for sealing the sensor portion 2 and the outside air. As shown in FIG. 2, a seal type ball bearing 5 is fixed to the rotary shaft 3, and the seal type ball bearing 5 is fixed by press fitting, shrinkage fitting, adhesion or the like so as not to move in the rotation axis direction. . The outer ring 5b of the seal type ball bearing and the case 4 of the sensor unit are made of resin 6 such as rubber.
Seal with. The rotating shaft 3 and the inner ring 5a of the seal type ball bearing are fixed, and even if the inner ring 5a of the seal type ball bearing rotates, the outer ring 5b of the seal type ball bearing has a resin such as rubber that contacts the case 4 of the sensor section. Since it is fixed at 6, the outer ring 5b of the sealed ball bearing does not rotate.
【０００９】また、もう１つの実施例として図３に示す
ように、センサー部のケース７にシール型ボールベアリ
ングの外輪５ｂを固定し、シール型ボールベアリングの
内輪５ａと回転軸３の間をゴム等の樹脂８で固定するこ
とによっても同じ効果を得ることができます。As another embodiment, as shown in FIG. 3, the outer ring 5b of the seal type ball bearing is fixed to the case 7 of the sensor part, and the space between the inner ring 5a of the seal type ball bearing and the rotary shaft 3 is made of rubber. The same effect can be obtained by fixing with resin 8 such as.
【００１０】[0010]
【発明の効果】以上のように、本発明のモータの回転軸
密閉装置は接触タイプの損失、音の発生、熱の発生、ゴ
ムの磨耗がなく、取付部の精度も従来のままで大きな変
更も必要なく、取付容易でかつ低トルク、低損失で回転
軸とカバーの空間を密閉することができ、実用上きわめ
て効果のある回転軸の密閉装置である。As described above, the motor rotary shaft sealing device of the present invention is free from contact type loss, noise generation, heat generation and rubber abrasion, and the precision of the mounting portion is largely changed as it is. It is a rotary shaft sealing device that is extremely effective in practice because it is easy to install and can seal the space between the rotary shaft and the cover with low torque and low loss.
【図１】モータ全体の概略構成図FIG. 1 is a schematic configuration diagram of an entire motor.
【図２】本発明の一実施例における回転軸密閉装置を示
す断面図FIG. 2 is a sectional view showing a rotary shaft sealing device according to an embodiment of the present invention.
【図３】本発明の他の実施例における回転軸密閉装置を
示す断面図FIG. 3 is a sectional view showing a rotary shaft sealing device according to another embodiment of the present invention.
１ モータ部 ２ センサー部 ３ 回転軸 ４，７ センサー部のケース ５ａ シール型ボールベアリングの内輪 ５ｂ シール型ボールベアリングの外輪 ５ｃ ボールベアリングのシール ６，８ ゴム等の樹脂 1 Motor part 2 Sensor part 3 Rotating shaft 4,7 Sensor part case 5a Sealed ball bearing inner ring 5b Sealed ball bearing outer ring 5c Ball bearing seal 6,8 Resin such as rubber
Claims (3)
に支持する２つのボールベアリングと、これらのボール
ベアリングを固定する２つのケーシングとを有するモー
タ部と、モータの速度や位置などを検出するセンサー部
とで構成するモータであって、前記センサー部を、モー
タのセンサー部のケースとモータ軸との間の隙間に、前
記回転軸に固定されたシール型ボールベアリングと、前
記シール型ボールベアリングとセンサー部のケースの間
を前記シール型ボールベアリングの外輪に設けたゴム等
の樹脂とで密閉したモータの回転軸密閉装置。1. A motor unit having a stator, a rotor, two ball bearings for supporting the rotor on a rotating shaft, and two casings for fixing these ball bearings, and the speed and position of the motor. A sensor configured to detect such as a motor, the sensor unit, in the gap between the motor sensor case and the motor shaft, a seal type ball bearing fixed to the rotating shaft, A rotary shaft sealing device for a motor, wherein a space between a seal type ball bearing and a case of a sensor part is sealed with a resin such as rubber provided on an outer ring of the seal type ball bearing.
ンサー部のケースに固定させ、前記シール型ボールベア
リングの内輪と回転軸の間をゴム等の樹脂を取り付けて
回転軸との間を密閉するようにした請求項１記載のモー
タの回転軸密閉装置。2. An outer ring of the seal type ball bearing is fixed to a case of a sensor part, and a resin such as rubber is attached between the inner ring of the seal type ball bearing and a rotary shaft to seal the gap with the rotary shaft. The rotary shaft sealing device for a motor according to claim 1.
樹脂の緊迫力でシールをすると同時に予圧をかけた請求
項１または２記載のモータの回転軸密閉装置。3. A rotary shaft sealing device for a motor according to claim 1, wherein the seal type ball bearing is sealed by a pressing force of a resin such as rubber, and at the same time a preload is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23676392A JP3232682B2 (en) | 1992-09-04 | 1992-09-04 | Motor rotary shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23676392A JP3232682B2 (en) | 1992-09-04 | 1992-09-04 | Motor rotary shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0690544A true JPH0690544A (en) | 1994-03-29 |
| JP3232682B2 JP3232682B2 (en) | 2001-11-26 |
Family
ID=17005436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23676392A Expired - Lifetime JP3232682B2 (en) | 1992-09-04 | 1992-09-04 | Motor rotary shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3232682B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19545924A1 (en) * | 1994-12-08 | 1996-06-20 | Unisia Jecs Corp | Method of controlling air-fuel ratio learning for IC engine |
| JP2009296811A (en) * | 2008-06-06 | 2009-12-17 | Jtekt Corp | Motor and electric power steering apparatus |
-
1992
- 1992-09-04 JP JP23676392A patent/JP3232682B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19545924A1 (en) * | 1994-12-08 | 1996-06-20 | Unisia Jecs Corp | Method of controlling air-fuel ratio learning for IC engine |
| DE19545924B4 (en) * | 1994-12-08 | 2004-01-29 | Unisia Jecs Corp., Atsugi | Methods and apparatus for controlling air / fuel ratio learning of an internal combustion engine |
| JP2009296811A (en) * | 2008-06-06 | 2009-12-17 | Jtekt Corp | Motor and electric power steering apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3232682B2 (en) | 2001-11-26 |
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