JP2016103871A - Motor - Google Patents

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JP2016103871A
JP2016103871A JP2014239634A JP2014239634A JP2016103871A JP 2016103871 A JP2016103871 A JP 2016103871A JP 2014239634 A JP2014239634 A JP 2014239634A JP 2014239634 A JP2014239634 A JP 2014239634A JP 2016103871 A JP2016103871 A JP 2016103871A
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electric motor
fixed
bearing
rotor
rotating shaft
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大輔 峯島
Daisuke Mineshima
大輔 峯島
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Toyo Electric Manufacturing Ltd
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Toyo Electric Manufacturing Ltd
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Priority to JP2014239634A priority Critical patent/JP2016103871A/en
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    • 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
    • F16C33/80—Labyrinth sealings
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

PROBLEM TO BE SOLVED: To provide a motor which has a labyrinth seal capable of reducing the number of components to contribute to space saving.SOLUTION: The motor comprises: bearing pressers 2a and 6b which are abutted to axially inside end faces of outer rings 31 of bearings 3a and 3b when a direction toward the inside of a motor case 1 in an axial direction is defined as an inside, and an oil drain member that is fixed to a rotary shaft 4. On the axially inside end faces of the bearing pressers, a first rugged part LSa is formed that repeats ruggedness in a radial direction and in the oil drain member, a second rugged part LSb is formed which is engaged with the first rugged part in a contactless manner, thereby forming labyrinth seals LSand LSwhich prevent a lubricant to be used for lubricating the bearings from being infiltrated axially insides by both the first and second rugged parts. Functional components CF and 81 of the motor which have any other application than the seals and are fixed to the rotary shaft are also used as the oil drain member, and the second rugged part is formed in the functional components.SELECTED DRAWING: Figure 1

Description

本発明は、電動機ケースと、この電動機ケース内に軸受を介して軸支される回転軸と、この回転軸に固定される回転子と、回転子を囲うように電動機ケース内に固定される固定子とを備える電動機に関する。   The present invention relates to an electric motor case, a rotary shaft that is pivotally supported in the electric motor case via a bearing, a rotor fixed to the rotary shaft, and a fixed that is fixed in the electric motor case so as to surround the rotor. The present invention relates to an electric motor including a child.

この種の電動機として所謂全閉内扇形のものが例えば特許文献１で知られている。このものでは、電動機ケース内を閉塞するブラケットに、回転子を挟んで対峙する一対の軸受を介して回転軸が軸支されている。軸方向のうち電動機ケースの内側に向かう方向を内方として、軸方向一方のブラケットは、軸受の外輪の軸方向内方の端面に当接する軸受押えを兼用する。他方、軸方向他方の軸受の外輪の軸方向内方の端面には軸受押えが当接し、軸受押えが軸方向他方のブラケットに固定されている。   As this type of electric motor, a so-called totally enclosed fan type is known from Patent Document 1, for example. In this configuration, the rotating shaft is pivotally supported by a bracket that closes the inside of the electric motor case via a pair of bearings facing each other with the rotor interposed therebetween. With the axial direction toward the inside of the motor case in the axial direction, one bracket in the axial direction also serves as a bearing retainer that comes into contact with the axially inner end surface of the outer ring of the bearing. On the other hand, the bearing retainer abuts against the axially inner end surface of the outer ring of the other axial bearing, and the bearing retainer is fixed to the other axial bracket.

ここで、軸受にはグリス等の潤滑剤が用いられるが、電動機の運転時に潤滑剤が電動機ケース内側に侵入しないようにする必要がある。上記特許文献１のものでは、軸受押えの軸方向内方の端面に径方向に凹凸を繰り返す第１の凹凸部を形成すると共に、回転軸に油切り部材を固定してその油切り部材の軸方向外方の端面に第２の凹凸部を形成し、電動機の組付時、第１の凹凸部と第２の凹凸部とを非接触で噛み合わせてラビリンスシールを構成するようにしている。然し、ラビリンスシールを構成するために別個の部品を設けるのでは、部品点数が増加するだけでなく、電動機ケース内でその設置スペースが必要となるという問題がある。   Here, a lubricant such as grease is used for the bearing, but it is necessary to prevent the lubricant from entering the inside of the motor case during operation of the motor. In the thing of the said patent document 1, while forming the 1st uneven | corrugated | grooved part which repeats an unevenness | corrugation to radial direction in the axially inner end surface of a bearing holder, an oil draining member is fixed to a rotating shaft, and the axis | shaft of the oil draining member A second concavo-convex portion is formed on the end face in the direction outward, and the labyrinth seal is configured by meshing the first concavo-convex portion and the second concavo-convex portion in a non-contact manner when the electric motor is assembled. However, if separate parts are provided to form the labyrinth seal, there is a problem that not only the number of parts is increased, but also an installation space is required in the motor case.

特開２０１４−１７１３１５号公報JP 2014-171315 A

本発明は、以上の点に鑑み、部品点数を削減できて省スペース化に寄与するようにした電動機を提供することをその目的とするものである。   In view of the above points, an object of the present invention is to provide an electric motor that can reduce the number of parts and contribute to space saving.

上記の課題を解決するために、電動機ケースと、この電動機ケース内に軸受を介して軸支される回転軸と、この回転軸に固定される回転子と、回転子を囲うように電動機ケース内に固定される固定子とを備える本発明の電動機は、軸方向のうち電動機ケースの内側に向かう方向を内方として、軸受の外輪の軸方向内方の端面に当接する軸受押えと回転軸に固定される油切り部材とを更に有し、軸受押えの軸方向内方の端面に、径方向に凹凸を繰り返す第１の凹凸部を形成し、油切り部材に、第１の凹凸部に非接触で噛み合う第２の凹凸部を形成して、第１及び第２の両凹凸部により軸受の潤滑に用いられる潤滑剤の軸方向内方への侵入を防止するラビリンスシールを構成し、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品を兼用し、この機能部品に第２の凹凸部を形成することを特徴とする。   In order to solve the above-described problems, an electric motor case, a rotating shaft that is pivotally supported in the electric motor case via a bearing, a rotor fixed to the rotating shaft, and an electric motor case that surrounds the rotor The electric motor of the present invention comprising a stator fixed to the bearing is provided with a bearing press and a rotating shaft that are in contact with the axially inner end face of the outer ring of the bearing, with the direction toward the inside of the motor case in the axial direction being inward. An oil drainage member that is fixed, and a first irregularity portion that repeats irregularities in the radial direction is formed on an axially inner end face of the bearing retainer. A labyrinth seal that forms a second concavo-convex portion that meshes in contact and prevents the lubricant used to lubricate the bearing from entering inward in the axial direction is formed by both the first and second concavo-convex portions. Has a use other than a seal as a member and is fixed to a rotating shaft Also it serves as a motive function component, and forming a second concave-convex portions on the functional component.

本発明によれば、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品を兼用したため、別個の部品を省略でき、その上、電動機の小型化を図ることができる。   According to the present invention, since the oil drainage member has a use other than the seal and is also used as a functional part of the electric motor fixed to the rotating shaft, a separate part can be omitted, and the electric motor can be reduced in size. .

なお、本発明において、機能部品は冷却ファンとすることができ、また、回転子が電磁鋼板を積層して構成され、軸方向両側から挟む一対の回転子押えを介して回転軸に固定されるような場合には、機能部品は回転子押えとすることができる。   In the present invention, the functional component can be a cooling fan, and the rotor is formed by laminating electromagnetic steel plates, and is fixed to the rotating shaft via a pair of rotor pressers sandwiched from both sides in the axial direction. In such a case, the functional component can be a rotor presser.

本発明の実施形態の電動機の構成を説明する断面図。Sectional drawing explaining the structure of the electric motor of embodiment of this invention.

以下、図面を参照して、部品点数を削減できて省スペース化に寄与するようにしたラビリンスシールを持つ本発明の電動機について所謂全閉内扇形のものを例にその実施形態を説明する。以下において、軸方向のうち電動機ケースの内側に向かう方向を内方として、図１を基準に「上」、「下」、「左」、「右」といった方向を示す用語を用いるものとする。   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an electric motor of the present invention having a labyrinth seal that can reduce the number of parts and contribute to space saving will be described below with reference to the drawings, taking a so-called totally enclosed fan as an example. In the following, terms that indicate directions such as “up”, “down”, “left”, and “right” with reference to FIG. 1 will be used with the direction toward the inside of the motor case as the inward in the axial direction.

図１を参照して、ＥＭは本発明の実施形態の電動機である。電動機ＥＭは、電動機ケース１を備え、電動機ケース１の左右には、電動機ケース１内を閉塞するブラケット２ａ，２ｂが夫々連結されている。両ブラケット２ａ，２ｂには一対の軸受３ａ，３ｂを介して回転軸４が軸支されている。この場合、左側のブラケット２ａの下面が、左側の軸受３ａの外輪３１の軸方向内方の端面及び上面に当接し、ブラケット２ａが第１の軸受押えを兼用するようにしている。軸受３ａの外輪の軸方向外方の端面には、回転軸４に固定の第１の油切り部材５ａを介して取り付けられる第２の軸受押え６ａが当接し、軸受３ａが抜け止めされようにしている。   Referring to FIG. 1, EM is an electric motor according to an embodiment of the present invention. The electric motor EM includes an electric motor case 1, and brackets 2 a and 2 b that close the inside of the electric motor case 1 are connected to the left and right sides of the electric motor case 1, respectively. A rotating shaft 4 is pivotally supported on both brackets 2a and 2b via a pair of bearings 3a and 3b. In this case, the lower surface of the left bracket 2a is in contact with the axially inner end surface and upper surface of the outer ring 31 of the left bearing 3a so that the bracket 2a also serves as the first bearing presser. A second bearing presser 6a attached to the rotary shaft 4 via a first oil draining member 5a abuts on the axially outer end surface of the outer ring of the bearing 3a so that the bearing 3a is prevented from coming off. ing.

右側の軸受３ｂの外輪３１の軸方向内方の端面及び上面には、右側のブラケット２ｂに固定される第３の軸受押え６ｂが当接している。また、軸受３ｂの外輪の軸方向外方の端面には、回転軸４に固定の第２の油切り部材５ｂを介して取り付けられる第４の軸受押え６ｃが当接し、上記同様、軸受３ｂが抜け止めされるようにしている。また、左側のブラケット２ａ及び第２〜第４の各軸受押え６ａ，６ｂ，６ｃには、両軸受３ａ，３ｂを臨むようにグリス等の潤滑剤ＬＯを収納する収納部７が夫々形成されている。   A third bearing retainer 6b fixed to the right bracket 2b is in contact with the axially inner end surface and upper surface of the outer ring 31 of the right bearing 3b. Further, a fourth bearing presser 6c attached to the rotary shaft 4 via a second oil draining member 5b is in contact with the axially outer end surface of the outer ring of the bearing 3b. It is designed to prevent it from coming off. The left bracket 2a and the second to fourth bearing retainers 6a, 6b, 6c are respectively provided with storage portions 7 for storing a lubricant LO such as grease so as to face both the bearings 3a, 3b. Yes.

電動機ケース１内には回転軸４に固定される回転子８が備えられ、回転子８を囲うように電動機ケース１内には固定子９が固定されている。この場合、回転子８は、複数枚の電磁鋼板を積層して構成され、これら電磁鋼板を軸方向両側から挟む一対の回転子押え８１，８２を回転軸４にすきま嵌め固定されている。また、電動機ケース１内には、左側の回転子押え８１の外方に位置させて回転軸４に固定されるファンＣＦが外挿されている。   A rotor 8 fixed to the rotating shaft 4 is provided in the motor case 1, and a stator 9 is fixed in the motor case 1 so as to surround the rotor 8. In this case, the rotor 8 is configured by laminating a plurality of electromagnetic steel plates, and a pair of rotor pressers 81 and 82 sandwiching the electromagnetic steel plates from both sides in the axial direction are fixed to the rotary shaft 4 by clearance fitting. In addition, a fan CF that is fixed to the rotary shaft 4 and is located outside the left rotor retainer 81 is extrapolated in the motor case 1.

ところで、電動機ＥＭの運転時、潤滑剤ＬＯが電動機ケース１内側に侵入しないようにする必要があり、その際、部品点数を削減できて省スペース化に寄与するように構成することが好ましい。本実施形態では、第１の軸受押えを兼用する左側のブラケット２ａの軸方向内方の端面に、径方向に凹凸を繰り返す第１の凹凸部ＬＳａを形成すると共に、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品であるファンＣＦに、第１の凹凸部ＬＳａに非接触で噛み合う、径方向に凹凸を繰り返す第２の凹凸部ＬＳｂを形成した。他方、第３の軸受押え６ｂの軸方向内方の端面に、径方向に凹凸を繰り返す第３の凹凸部ＬＳｃを形成すると共に、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品である右側の回転子押え８２に、第１の凹凸部ＬＳｃに非接触で噛み合う、径方向に凹凸を繰り返す第２の凹凸部ＬＳｄを形成した。そして、電動機ＥＭの組付時、第１の凹凸部ＬＳａ，ＬＳｃと第２の凹凸部ＬＳｂ，ＬＳｄとを非接触で噛み合わせてラビリンスシールＬＳ１，ＬＳ２を構成するようにして軸受３ａ，３ｂの潤滑に用いられる潤滑剤ＬＯの軸方向内方への侵入を防止している。 By the way, during operation of the electric motor EM, it is necessary to prevent the lubricant LO from entering the inner side of the electric motor case 1, and at that time, it is preferable to reduce the number of parts and contribute to space saving. In the present embodiment, the first uneven portion LSa that repeats unevenness in the radial direction is formed on the inner end surface in the axial direction of the left bracket 2a that also serves as the first bearing retainer, and an oil removal member other than a seal is formed. The fan CF, which is a functional part of an electric motor that has a use and is fixed to the rotating shaft, was formed with a second concavo-convex portion LSb that meshes in a non-contact manner with the first concavo-convex portion LSa and repeats the concavo-convex in the radial direction. On the other hand, a third uneven portion LSC that repeats unevenness in the radial direction is formed on the inner end surface of the third bearing retainer 6b in the axial direction, and has a use other than a seal as an oil draining member and is fixed to the rotating shaft. A second uneven portion LSd that repeats unevenness in the radial direction and meshes with the first uneven portion LSc in a non-contact manner is formed in the right rotor retainer 82 that is a functional component of the motor. Then, when assembling the electric motor EM, the first uneven portion LSa, LSc a second uneven portion LSb, bearings 3a as to engage in a non-contact and LSd constituting the labyrinth seal LS 1, LS 2, The lubricant LO used for the lubrication of 3b is prevented from entering inward in the axial direction.

以上の実施形態によれば、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品を兼用したため、別個の部品を省略でき、その上、電動機ＥＭの小型化を図ることができる。なお、本実施形態では、詳細な説明は省略するが、潤滑剤ＬＯの軸方向外方への排出を防止するため、上記同様に、ラビリンスシールを設けている。   According to the above embodiment, since the oil drainage member has a use other than the seal and is also used as the functional part of the electric motor fixed to the rotating shaft, a separate part can be omitted, and the electric motor EM can be reduced in size. be able to. Although a detailed description is omitted in this embodiment, a labyrinth seal is provided in the same manner as described above in order to prevent the lubricant LO from being discharged outward in the axial direction.

以上、本発明の実施形態について説明したが、本発明は上記のものに限定されるものではない。上記実施形態では、ファンＣＦを設け、このファンＣＦに第２の凹凸部ＬＳｂを設けるものを例に説明したが、ファンＣＦは省略することができ、このような場合には、油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品、例えば、左側の回転子押え８１に第２の凹凸部ＬＳｂを形成すればよい。更に、上記実施形態では、所謂全閉内扇形のものを例に説明したが、これに限定されるものではなく、本発明は、他の形式の電動機にも広く適用できる。   As mentioned above, although embodiment of this invention was described, this invention is not limited to said thing. In the above embodiment, the fan CF is provided and the fan CF is provided with the second concavo-convex portion LSb as an example. However, the fan CF can be omitted. What is necessary is just to form the 2nd uneven | corrugated | grooved part LSb in the functional component of the motor which has uses other than a seal | sticker and is fixed to a rotating shaft, for example, the left rotor retainer 81. Furthermore, in the above-described embodiment, a so-called totally enclosed fan type was described as an example. However, the present invention is not limited to this, and the present invention can be widely applied to other types of electric motors.

ＥＭ…電動機、１…電動機ケース、２ａ…ブラケット（軸受押えを兼用）、３ａ,３ｂ…軸受、４…回転軸、６ａ〜６ｃ…軸受押え、８…回転子、８１，８２…回転子押え（機能部品）、９…固定子、ＣＦ…ファン（機能部品）、ＬＳ１，ＬＳ２…ラビリンスシール、ＬＳａ〜ＬＳｄ…径方向の凹凸部。


EM ... Electric motor, 1 ... Electric motor case, 2a ... Bracket (also used as bearing retainer), 3a, 3b ... Bearing, 4 ... Rotating shaft, 6a-6c ... Bearing retainer, 8 ... Rotor, 81, 82 ... Rotor retainer ( Functional parts), 9 ... Stator, CF ... Fan (functional parts), LS 1 , LS 2 ... Labyrinth seals, LSa to LSd ... Radial uneven parts.


Claims (3)

電動機ケースと、この電動機ケース内に軸受を介して軸支される回転軸と、この回転軸に固定される回転子と、回転子を囲うように電動機ケース内に固定される固定子とを備える電動機であって、
軸方向のうち電動機ケースの内側に向かう方向を内方として、軸受の外輪の軸方向内方の端面に当接する軸受押えと回転軸に固定される油切り部材とを更に有し、軸受押えの軸方向内方の端面に、径方向に凹凸を繰り返す第１の凹凸部を形成し、油切り部材に、第１の凹凸部に非接触で噛み合う第２の凹凸部を形成して、第１及び第２の両凹凸部により軸受の潤滑に用いられる潤滑剤の軸方向内方への侵入を防止するラビリンスシールを構成するものにおいて、
油切り部材としてシール以外の用途を持ち且つ回転軸に固定される電動機の機能部品を兼用し、この機能部品に第２の凹凸部を形成することを特徴とする電動機。 An electric motor case, a rotating shaft pivotally supported in the electric motor case via a bearing, a rotor fixed to the rotating shaft, and a stator fixed in the electric motor case so as to surround the rotor An electric motor,
A bearing retainer that abuts against the axially inner end surface of the outer ring of the bearing and an oil draining member that is fixed to the rotating shaft, with the direction toward the inside of the motor case in the axial direction being inward. A first uneven portion that repeats unevenness in the radial direction is formed on the inner end face in the axial direction, and a second uneven portion that engages with the first uneven portion in a non-contact manner is formed on the oil draining member. And a labyrinth seal that prevents the lubricant used for lubricating the bearing from entering inward in the axial direction by the second concave and convex portions,
An electric motor having a use other than a seal as an oil draining member and also serving as a functional part of an electric motor fixed to a rotating shaft, and forming a second uneven portion on the functional part. 前記機能部品は冷却ファンであることを特徴とする請求項１記載の電動機。   The electric motor according to claim 1, wherein the functional component is a cooling fan. 請求項１記載の電動機であって、回転子が電磁鋼板を積層して構成され、軸方向両側から挟む一対の回転子押えを介して回転軸に固定されるものにおいて、前記機能部品は、回転子押えであることを特徴とする電動機。   2. The electric motor according to claim 1, wherein the rotor is configured by laminating electromagnetic steel plates, and is fixed to the rotary shaft via a pair of rotor pressers sandwiched from both sides in the axial direction. An electric motor characterized by a presser foot.
JP2014239634A 2014-11-27 2014-11-27 Motor Pending JP2016103871A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
JP2018179038A (en) * 2017-04-05 2018-11-15 東洋電機製造株式会社 Method for replacing bearing of electric motor
CN110365150A (en) * 2018-04-09 2019-10-22 东芝三菱电机产业系统株式会社 Rotating electric machine, bearing construction body and clearance inspection method
RU2741052C1 (en) * 2020-09-04 2021-01-22 Акционерное общество «Аэроэлектромаш» Electric machine with contactless bearing seal

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JP2014171315A (en) * 2013-03-04 2014-09-18 Toyo Electric Mfg Co Ltd Motor

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JP2014171315A (en) * 2013-03-04 2014-09-18 Toyo Electric Mfg Co Ltd Motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018179038A (en) * 2017-04-05 2018-11-15 東洋電機製造株式会社 Method for replacing bearing of electric motor
CN110365150A (en) * 2018-04-09 2019-10-22 东芝三菱电机产业系统株式会社 Rotating electric machine, bearing construction body and clearance inspection method
JP2019187059A (en) * 2018-04-09 2019-10-24 東芝三菱電機産業システム株式会社 Rotary electric machine, bearing structure body, and gap inspection method
JP6994422B2 (en) 2018-04-09 2022-01-14 東芝三菱電機産業システム株式会社 Rotating machine, bearing structure, and gap inspection method
RU2741052C1 (en) * 2020-09-04 2021-01-22 Акционерное общество «Аэроэлектромаш» Electric machine with contactless bearing seal

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