JP2003052145A - Oil-sealing structure for motor - Google Patents
Oil-sealing structure for motorInfo
- Publication number
- JP2003052145A JP2003052145A JP2001237751A JP2001237751A JP2003052145A JP 2003052145 A JP2003052145 A JP 2003052145A JP 2001237751 A JP2001237751 A JP 2001237751A JP 2001237751 A JP2001237751 A JP 2001237751A JP 2003052145 A JP2003052145 A JP 2003052145A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- oil seal
- shaped
- motor
- oil
- 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
Landscapes
- Sealing Of Bearings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モータのオイルシ
ール構造に関し、特に、前蓋に設けられその内側が回転
軸の外周面に摺接する構成の輪状オイルシールの外側
に、ダストリップ又はラビリンスからなる輪状侵入阻止
手段を設けることにより、油又はダスト等の軸受側等へ
の侵入を阻止するための新規な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil seal structure for a motor, and more particularly, to a ring-shaped oil seal having a structure in which a front lid is slidably in contact with an outer peripheral surface of a rotary shaft, and a dust lip or a labyrinth is attached to The present invention relates to a new improvement for preventing oil or dust from entering the bearing side by providing the ring-shaped intrusion preventing means.
【０００２】[0002]
【従来の技術】従来、用いられていたこの種のモータの
オイルシール構造としては、例えば、図示していない
が、輪状オイルシールを前蓋に取付け、その内側を回転
軸の外周面に摺接させ、モータの取付けた相手側である
減速ギヤ機構から漏れてくる油やダスト等のモータ内へ
の侵入を阻止するようにしていた。2. Description of the Related Art As an oil seal structure for a motor of this type that has been conventionally used, for example, although not shown, a ring-shaped oil seal is attached to a front lid, and the inside of the oil seal is slidably contacted with an outer peripheral surface of a rotary shaft. Thus, the oil, dust, etc. leaking from the reduction gear mechanism, which is the counterpart of the motor, is prevented from entering the motor.
【０００３】[0003]
【発明が解決しようとする課題】従来のモータのオイル
シール構造は、以上のように構成されていたため、次の
ような課題が存在していた。すなわち、このオイルシー
ルのシール性が十分ではなく、オイル中に増ちょう剤等
の異物が混在した場合は、この異物によってシール性能
が著しく低下し、減速ギヤ機構からのグリース、油及び
ダスト等が入りやすく、モータ内にこれらが浸入する
と、モータ内に設けられた内蔵ブレーキのトルク低下に
よる保持力の低下、センサー部の動作異常によるサーボ
モータの暴走や停止等が発生し、ロボット等の場合には
周囲のワークを破壊する等の大きい損失となっていた。
また、オイルシールに併用して輪状のダストリップを用
いることもあったが、このダストリップをオイルシール
よりもモータ内側に配設していたため、オイル、グリー
ス等の異物に対する効果は全くなく、シール効果は得ら
れていなかった。Since the conventional oil seal structure for a motor is constructed as described above, there have been the following problems. That is, if the oil seal does not have sufficient sealing performance and foreign matter such as a thickener is mixed in the oil, the foreign matter significantly reduces the sealing performance, and grease, oil, dust, etc. from the reduction gear mechanism may be removed. If they enter the motor easily, if they enter the motor, the holding force will decrease due to the torque decrease of the built-in brake installed in the motor, and the servo motor will run out or stop due to an abnormal operation of the sensor. Had a large loss such as destroying the surrounding work.
In addition, a ring-shaped dust lip was sometimes used in combination with the oil seal, but since this dust lip was placed inside the motor rather than the oil seal, there was no effect against foreign matter such as oil and grease, and the seal No effect was obtained.
【０００４】本発明は、以上のような課題を解決するた
めになされたもので、特に、前蓋に設けられその内側が
回転軸の外周面に摺接する構成の輪状オイルシールの外
側に、ダストリップ又はラビリンスからなる輪状侵入阻
止手段を設けることにより、油又はダスト等の軸受側等
への侵入を阻止するようにしたモータのオイルシール構
造を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and in particular, the front lid is provided on the outer side of a ring-shaped oil seal which is in sliding contact with the outer peripheral surface of the rotary shaft. An object of the present invention is to provide an oil seal structure for a motor, which is provided with a ring-shaped invasion preventing means made of a strip or a labyrinth so as to prevent intrusion of oil or dust into the bearing side or the like.
【０００５】[0005]
【課題を解決するための手段】本発明によるモータのオ
イルシール構造は、ステータコイルを有するステータに
設けられた前蓋の軸受を、ロータを有する回転軸が貫通
して保持され、前記前蓋に設けられた輪状オイルシール
の内側を前記回転軸の外周面に摺接するようにしたモー
タのオイルシール構造において、前記輪状オイルシール
の軸方向における外側位置に油又はダストの侵入を阻止
するための輪状侵入阻止手段を設けた構成であり、ま
た、前記輪状侵入阻止手段は、前記前蓋に設けられその
内側が前記回転軸の外周面に摺接する断面板状のダスト
リップからなる構成であり、また、前記輪状侵入阻止手
段は、前記回転軸の外周面に設けられその外側が前記前
蓋の開口内周壁に対して接触又は非接触状態で対応して
いるラビリンスからなる構成であり、また、前記輪状侵
入阻止手段は、前記前蓋の開口内周壁に設けられその内
側が前記回転軸の外周面に対して接触又は非接触状態で
対応しているラビリンスからなる構成である。In a motor oil seal structure according to the present invention, a rotating shaft having a rotor penetrates and is held by a bearing of a front lid provided on a stator having a stator coil, and the bearing is provided on the front lid. In an oil seal structure of a motor in which the inside of a ring-shaped oil seal provided is in sliding contact with the outer peripheral surface of the rotary shaft, a ring-shaped ring for preventing oil or dust from entering the outer position in the axial direction of the ring-shaped oil seal. Intrusion prevention means is provided, and the ring-shaped intrusion prevention means is formed of a dust lip having a cross-section plate shape, the inside of which is provided on the front lid and is in sliding contact with the outer peripheral surface of the rotating shaft. From the labyrinth, the ring-shaped intrusion prevention means is provided on the outer peripheral surface of the rotary shaft, and the outer side thereof corresponds to the inner peripheral wall of the opening of the front lid in a contact or non-contact state The ring-shaped intrusion prevention means is a labyrinth provided on the inner peripheral wall of the opening of the front lid, the inner side of which corresponds to the outer peripheral surface of the rotary shaft in a contact or non-contact state. Is.
【０００６】[0006]
【発明の実施の形態】以下、図面と共に本発明によるモ
ータのオイルシール構造の好適な実施の形態について説
明する。図１において符号１で示されるものは、全体形
状が筒形をなすモータケースであり、このモータケース
１の内壁１ａにはステータコイル２を有するステータ３
が設けられている。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an oil seal structure for a motor according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a motor case having a tubular shape as a whole, and a stator 3 having a stator coil 2 on an inner wall 1 a of the motor case 1.
Is provided.
【０００７】前記モータケース１の前側には、軸受４を
有する前蓋５が取付けられ、このモータケース１の後側
には、周知の電磁ブレーキ６が設けられている。前記モ
ータケース１の後端１ａには、軸受７を有する取付部材
８が設けられており、前記各軸受４、７間にはロータ９
を有する回転軸１０が貫通して回転自在に設けられてい
る。A front lid 5 having a bearing 4 is attached to the front side of the motor case 1, and a known electromagnetic brake 6 is provided to the rear side of the motor case 1. A mounting member 8 having a bearing 7 is provided at the rear end 1a of the motor case 1, and a rotor 9 is provided between the bearings 4 and 7.
A rotary shaft 10 having a is rotatably provided so as to penetrate therethrough.
【０００８】前記取付部材８の後端には、回転トランス
１１を有するレゾルバ１２が設けられ、後蓋１３が前記
後端１ａに固定されている。前記前蓋５の開口内周壁１
３には、従来から用いられているゴム等からなる弾性形
状の輪状オイルシール１４が固定して設けられており、
この輪状オイルシール１４の断面舌片状をなす内側１４
ａは前記回転軸１０の外周面１０ａに摺接して配設され
ている。A resolver 12 having a rotary transformer 11 is provided at the rear end of the mounting member 8, and a rear lid 13 is fixed to the rear end 1a. Inner peripheral wall 1 of the opening of the front lid 5
3, an elastic ring-shaped oil seal 14 made of rubber or the like which has been conventionally used is fixedly provided,
The inner side 14 of the ring-shaped oil seal 14 having a tongue-like cross section
The a is slidably arranged on the outer peripheral surface 10a of the rotary shaft 10.
【０００９】前記輪状オイルシール１４の前記回転軸１
０の軸方向における外側位置には、輪状侵入阻止手段を
なす輪状で断面板状のダストリップ２０が配設されてい
る。前記ダストリップ２０の外側２０ａは前記開口内周
壁１３に固定して設けられ、その内側２０ｂは前記回転
軸１０の外周面１０ａに摺接している。The rotary shaft 1 of the ring-shaped oil seal 14
At the outer side position of 0 in the axial direction, a ring-shaped cross-section plate-shaped dust lip 20 which is a ring-shaped intrusion prevention means is arranged. The outer side 20a of the dust lip 20 is fixedly provided on the inner peripheral wall 13 of the opening, and the inner side 20b thereof is in sliding contact with the outer peripheral surface 10a of the rotary shaft 10.
【００１０】前述のように構成されたサーボモータ３０
の回転軸１０の接続軸部１０Ａを、図示しないロボット
や工作機等の減速ギヤ機構に接続し、サーボモータ３０
の作動により減速ギヤ機構を駆動した場合、この減速ギ
ヤ機構から漏れ出してくる油やグリース等はこの回転軸
１０の外周面１０ａ上を流れてくるが、ダストリップ２
０でまず阻止されると共に、このダストリップ２０を例
えくぐり抜けたとしても、輪状オイルシール１４で完全
に止められ、軸受４及びその内部への油及びグリース等
の侵入は完全に防止される。すなわち、油やグリース中
の増ちょう剤は異物としてオイルシールに悪い作用をな
すが、ダストリップやラビリンスによってこの異物の侵
入を完全に防ぐことができる。Servo motor 30 constructed as described above
The connecting shaft portion 10A of the rotary shaft 10 is connected to a reduction gear mechanism such as a robot or a machine tool (not shown), and the servo motor 30
When the reduction gear mechanism is driven by the operation of, the oil and grease leaking from the reduction gear mechanism flow on the outer peripheral surface 10a of the rotary shaft 10, but the dust lip 2
When the dust lip 20 is passed through, it is completely stopped by the ring-shaped oil seal 14, and entry of oil, grease and the like into the bearing 4 and its interior is completely prevented. That is, the thickener in the oil or grease has a bad effect on the oil seal as a foreign substance, but the dust lip or labyrinth can completely prevent the foreign substance from entering.
【００１１】また、図２は図１の他の形態を示すもの
で、前記輪状侵入阻止手段２０を、ラビリンスに変更し
た構成である。すなわち、前記ラビリンス２０は、前記
回転軸１０の外周面１０ａにその内側２０ｂが固定され
ていると共に、その外側２０ａが前蓋５の開口内周壁１
３に対して接触又は非接触状態で対応している。FIG. 2 shows another embodiment of FIG. 1, in which the ring-shaped intrusion prevention means 20 is replaced with a labyrinth. That is, in the labyrinth 20, the inner side 20b is fixed to the outer peripheral surface 10a of the rotating shaft 10, and the outer side 20a is the inner peripheral wall 1 of the opening of the front lid 5.
It corresponds to 3 in a contact or non-contact state.
【００１２】また、図３は図１の他の形態を示すもの
で、前記輪状侵入阻止手段２０を、ラビリンスに変更し
た構成である。すなわち、前記ラビリンス２０は、前記
前蓋５の開口内周壁１３にその外側２０ａが固定されて
いると共に、その内側２０ｂが回転軸１０の外周面１０
ａに対して接触又は非接触状態で対応している。尚、モ
ータの他の形態としては、ステータ３の外周をケースの
一部とする構成にも適用可である。FIG. 3 shows another embodiment of FIG. 1, in which the ring-shaped intrusion preventing means 20 is replaced with a labyrinth. That is, in the labyrinth 20, the outer side 20 a is fixed to the opening inner peripheral wall 13 of the front lid 5, and the inner side 20 b is fixed to the outer peripheral surface 10 of the rotating shaft 10.
It corresponds to a in a contact or non-contact state. It should be noted that other forms of the motor can be applied to a configuration in which the outer circumference of the stator 3 is part of the case.
【００１３】[0013]
【発明の効果】本発明によるモータのオイルシール構造
は、以上のように構成されているため、次のような効果
を得ることができる。すなわち、前蓋側に設けられた輪
状オイルシールの外側位置に、ダストリップあるいはラ
ビリンスを設けているため、輪状オイルシールに到達す
る油やグリース等の異物を全て除去することができ、モ
ータ内への油やグリース等の侵入を完全に防止すること
ができる。そのため、電磁ブレーキやセンサーの機能保
持、サーボモータの動作及び性能が安定し、長寿命化が
達成できる。Since the oil seal structure for a motor according to the present invention is constructed as described above, the following effects can be obtained. That is, since the dust lip or labyrinth is provided outside the ring-shaped oil seal provided on the front lid side, it is possible to remove all foreign matters such as oil and grease that reach the ring-shaped oil seal. It is possible to completely prevent oil and grease from entering. Therefore, the functions of the electromagnetic brake and the sensor are maintained, the operation and performance of the servo motor are stabilized, and the service life can be extended.
【図１】本発明によるモータのオイルシール構造を示す
断面図である。FIG. 1 is a sectional view showing an oil seal structure of a motor according to the present invention.
【図２】図１の他の形態を示す断面図である。FIG. 2 is a cross-sectional view showing another form of FIG.
【図３】図１の他の形態を示す断面図である。FIG. 3 is a cross-sectional view showing another form of FIG.
１ モータケース
２ ステータコイル
３ ステータ
４、７ 軸受
９ ロータ
１０ 回転軸
１４ 輪状オイルシール
１４ａ 内側
２０ 輪状侵入阻止手段（ダストリップ、ラビリン
ス）
２０ａ 外側
２０ｂ 内側
３０ サーボモータ1 Motor Case 2 Stator Coil 3 Stator 4, 7 Bearing 9 Rotor 10 Rotating Shaft 14 Ring-shaped Oil Seal 14a Inside 20 Ring-shaped Intrusion Prevention Means (Dust Lip, Labyrinth) 20a Outside 20b Inside 30 Servo Motor
Claims (4)
に設けられた前蓋(5)の軸受(4)を、ロータ(9)を有する
回転軸(10)が貫通して保持され、前記前蓋(5)に設けら
れた輪状オイルシール(14)の内側(14a)を前記回転軸(1
0)の外周面(10a)に摺接するようにしたモータのオイル
シール構造において、前記輪状オイルシール(14)の軸方
向における外側位置に油又はダストの侵入を阻止するた
めの輪状侵入阻止手段(20)を設けたことを特徴とするモ
ータのオイルシール構造。1. A stator (3) having a stator coil (2)
The rotary shaft (10) having the rotor (9) is held by penetrating the bearing (4) of the front lid (5) provided in the front lid (5), and the ring-shaped oil seal (14) provided in the front lid (5). The inner side (14a) of the rotary shaft (1
In the oil seal structure of the motor that is brought into sliding contact with the outer peripheral surface (10a) of (0), a ring-shaped intrusion prevention means (block) for preventing oil or dust from entering the outer position in the axial direction of the ring-shaped oil seal (14) ( The motor oil seal structure is characterized in that 20) is provided.
(5)に設けられその内側(20b)が前記回転軸(10)の外周面
(10a)に摺接する断面板状のダストリップからなること
を特徴とする請求項１記載のモータのオイルシール構
造。2. The ring-shaped intrusion prevention means (20) comprises the front lid.
The inner surface (20b) of (5) is the outer peripheral surface of the rotating shaft (10).
2. The oil seal structure for a motor according to claim 1, wherein the oil seal structure is made of a dust lip having a plate-like cross section that is in sliding contact with (10a).
軸(10)の外周面(10a)に設けられその外側(20a)が前記前
蓋(5)の開口内周壁(13)に対して接触又は非接触状態で
対応しているラビリンスからなることを特徴とする請求
項１記載のモータのオイルシール構造。3. The ring-shaped intrusion prevention means (20) is provided on the outer peripheral surface (10a) of the rotary shaft (10), and the outer side (20a) of the ring-shaped intrusion prevention means (20) forms an opening inner peripheral wall (13) of the front lid (5). The oil seal structure for a motor according to claim 1, wherein the oil seal structure is formed of a labyrinth that is in contact or non-contact with the labyrinth.
(5)の開口内周壁(13)に設けられその内側が前記回転軸
(10)の外周面(10a)に対して接触又は非接触状態で対応
しているラビリンスからなることを特徴とする請求項１
記載のモータのオイルシール構造。4. The front cover is provided with the ring-shaped intrusion prevention means (20).
The inner wall of the opening (5) is provided on the inner wall (13) and the inner side is the rotary shaft.
The labyrinth which corresponds to the outer peripheral surface (10a) of the (10) in a contact or non-contact state.
Oil seal structure for the described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001237751A JP2003052145A (en) | 2001-08-06 | 2001-08-06 | Oil-sealing structure for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001237751A JP2003052145A (en) | 2001-08-06 | 2001-08-06 | Oil-sealing structure for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003052145A true JP2003052145A (en) | 2003-02-21 |
Family
ID=19068778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001237751A Pending JP2003052145A (en) | 2001-08-06 | 2001-08-06 | Oil-sealing structure for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003052145A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7139527B2 (en) | 2001-12-28 | 2006-11-21 | Hitachi, Ltd. | Multi point wireless transmission repeater system and wireless equipments |
| CN102097883A (en) * | 2010-12-24 | 2011-06-15 | 溧阳市科华机械制造有限公司 | Motor end cover sealing device capable of preventing dust and sand from entering interior of motor |
| CN102195386A (en) * | 2010-03-15 | 2011-09-21 | 株式会社安川电机 | Rotary motor |
| JP2011217592A (en) * | 2010-03-15 | 2011-10-27 | Yaskawa Electric Corp | Rotary electric machine |
| JP2011234521A (en) * | 2010-04-28 | 2011-11-17 | Yamaha Motor Co Ltd | Motor having auxiliary device, and single-axis robot and expansion device provided with the same |
| DE102015104369A1 (en) | 2014-03-31 | 2015-10-01 | Fanuc Corporation | Electric motor with sealing component and method for producing an electric motor |
| JP2016131482A (en) * | 2015-01-13 | 2016-07-21 | アスモ株式会社 | Lundell type motor and assembling method of lundell type motor |
| CN107979209A (en) * | 2016-10-24 | 2018-05-01 | 发那科株式会社 | Motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02104753U (en) * | 1989-02-06 | 1990-08-21 | ||
| JPH11356001A (en) * | 1998-06-09 | 1999-12-24 | Aichi Electric Co Ltd | Bearing device of motor |
| JP2000134857A (en) * | 1998-08-19 | 2000-05-12 | Yaskawa Electric Corp | Rotating-type motor |
-
2001
- 2001-08-06 JP JP2001237751A patent/JP2003052145A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02104753U (en) * | 1989-02-06 | 1990-08-21 | ||
| JPH11356001A (en) * | 1998-06-09 | 1999-12-24 | Aichi Electric Co Ltd | Bearing device of motor |
| JP2000134857A (en) * | 1998-08-19 | 2000-05-12 | Yaskawa Electric Corp | Rotating-type motor |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7139527B2 (en) | 2001-12-28 | 2006-11-21 | Hitachi, Ltd. | Multi point wireless transmission repeater system and wireless equipments |
| CN102195386A (en) * | 2010-03-15 | 2011-09-21 | 株式会社安川电机 | Rotary motor |
| JP2011217592A (en) * | 2010-03-15 | 2011-10-27 | Yaskawa Electric Corp | Rotary electric machine |
| JP2011234521A (en) * | 2010-04-28 | 2011-11-17 | Yamaha Motor Co Ltd | Motor having auxiliary device, and single-axis robot and expansion device provided with the same |
| CN102097883A (en) * | 2010-12-24 | 2011-06-15 | 溧阳市科华机械制造有限公司 | Motor end cover sealing device capable of preventing dust and sand from entering interior of motor |
| DE102015104369A1 (en) | 2014-03-31 | 2015-10-01 | Fanuc Corporation | Electric motor with sealing component and method for producing an electric motor |
| JP2015195668A (en) * | 2014-03-31 | 2015-11-05 | ファナック株式会社 | Electric motor including seal member and manufacturing method of the same |
| JP2016131482A (en) * | 2015-01-13 | 2016-07-21 | アスモ株式会社 | Lundell type motor and assembling method of lundell type motor |
| CN107979209A (en) * | 2016-10-24 | 2018-05-01 | 发那科株式会社 | Motor |
| JP2018074629A (en) * | 2016-10-24 | 2018-05-10 | ファナック株式会社 | Electric motor that can inhibit intrusion of foreign matters |
| US10284048B2 (en) | 2016-10-24 | 2019-05-07 | Fanuc Corporation | Electric motor for suppressing entry of foreign substances |
| DE102017124275B4 (en) | 2016-10-24 | 2019-12-24 | Fanuc Corporation | Electric motor in which the penetration of foreign bodies can be suppressed |
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