WO2014115501A1 - External rotation-type induction motor and ceiling fan equipped with same - Google Patents

External rotation-type induction motor and ceiling fan equipped with same Download PDF

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Publication number
WO2014115501A1
WO2014115501A1 PCT/JP2014/000110 JP2014000110W WO2014115501A1 WO 2014115501 A1 WO2014115501 A1 WO 2014115501A1 JP 2014000110 W JP2014000110 W JP 2014000110W WO 2014115501 A1 WO2014115501 A1 WO 2014115501A1
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WO
WIPO (PCT)
Prior art keywords
shaft
induction motor
abduction
stator core
diameter portion
Prior art date
Application number
PCT/JP2014/000110
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French (fr)
Japanese (ja)
Inventor
宗忠 佐藤
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パナソニック株式会社
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Publication of WO2014115501A1 publication Critical patent/WO2014115501A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/0646—Details of the stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/088—Ceiling fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to an abduction type induction motor and a ceiling fan equipped with the induction motor.
  • FIG. 5 is a cross-sectional view of a conventional abduction induction motor.
  • the abduction induction motor 102 includes a stator core 107, a shaft 106, and a rotor 110.
  • a plurality of inner windings 108 and a plurality of outer windings 109 are arranged on the stator core 107.
  • the shaft 106 is attached to the central portion of the stator core 107.
  • the bearings 112 a and 112 b are disposed above and below the shaft 106.
  • the rotor 110 rotates around the shaft 106 together with the upper cover 113 and the lower cover 114 via the bearings 112a and 112b. Further, there is a slight gap 111 between the stator core 107 and the rotor 110. At this time, the stator core 107 and the shaft 106 are fixed by a general press-fitting method.
  • Such a conventional abduction induction motor has the following problems.
  • the gap 111 is narrowed as much as possible. That is, the magnetic flux generated in the inner winding 108 and the outer winding 109 arranged in the stator core 107 is effectively transmitted to the rotor 110.
  • the shaft 106 is fixed by press-fitting to the stator core 107, it is difficult to ensure the accuracy of the perpendicularity when the shaft 106 and the stator core 107 are assembled. Therefore, the axial distance between the outer peripheral surface of the stator core 107 and the inner peripheral surface of the rotor 110 in the gap 111 is likely to be non-uniform.
  • electromagnetic vibration noise is generated.
  • the outer peripheral surface of the stator core 107 and the inner peripheral surface of the rotor 110 come into contact with each other, and abnormal noise such as sliding noise is generated. In the worst case, the abduction induction motor 102 is in a restrained state.
  • the outer rotation type induction motor of the present invention has a shaft hole that penetrates the shaft in the center, a stator core in which an inner winding and an outer winding are arranged near the outer periphery, an outer winding and a gap. And a disposed rotor.
  • the rotor rotates together with the upper cover and the lower cover via a bearing attached to the shaft.
  • a part of the shaft is hollow and a power supply connection line is passed through the shaft.
  • the shaft has a stepped structure consisting of a small diameter portion and a large diameter portion in the longitudinal direction. The small-diameter portion is press-fitted into the shaft hole, and a step portion formed in the large-diameter portion abuts on the upper end surface of the stator core.
  • the shaft is fixed to the stator core without a gap, so that the perpendicularity between the shaft and the stator core is maintained, and the outer peripheral surface of the stator core and the rotor in the gap are maintained.
  • the axial distance from the inner peripheral surface is uniform. As a result, the gap size is narrowed, so that the operation efficiency of the abduction induction motor is improved and power saving is achieved.
  • FIG. 1 is a side view showing a ceiling fan on which an abduction type induction motor according to an embodiment of the present invention is mounted.
  • FIG. 2 is a partial cross-sectional view of the abduction induction motor.
  • FIG. 3A is a partially enlarged cross-sectional view of a stator core and a shaft press-fitting portion of the abduction induction motor.
  • FIG. 3B is a partially enlarged cross-sectional view of Modification 1 of the stator core and the shaft press-fitting portion of the abduction type induction motor.
  • FIG. 3C is a partially enlarged cross-sectional view of a second modification of the stator core and the shaft press-fitting portion of the abduction induction motor.
  • FIG. 4 is a partially enlarged cross-sectional view of the tip of the small diameter portion of the shaft of the abduction type induction motor.
  • FIG. 5 is a cross-sectional view of a conventional abduction induction motor.
  • FIG. 1 is a side view of a ceiling fan equipped with an abduction induction motor according to an embodiment of the present invention.
  • the ceiling fan 1 is a fan attached to the ceiling, and an abduction induction motor 2 is used as a drive source.
  • the support column 4 is fixed downward on the ceiling.
  • An abduction induction motor 2 having a shaft 6 protruding upward is connected to the support column 4.
  • the abduction induction motor 2 includes blades 3.
  • the outer side of the abduction induction motor 2 is covered with a main body cover 5.
  • the housing of the abduction induction motor 2 may be exposed without using the main body cover 5.
  • FIG. 2 is a partial cross-sectional view of an abduction type induction motor according to an embodiment of the present invention
  • FIG. 3A is a partially enlarged cross-sectional view of a stator core and a shaft press-fitting portion of the abduction type induction motor
  • FIG. 3C is a partially enlarged cross-sectional view of a second modification of the stator core and shaft press-fitting portion of the abduction type induction motor.
  • FIG. is there.
  • the abduction type induction motor 2 is a capacitor induction motor including a stator core 7 and a rotor 10.
  • an inner winding 8 that serves as an auxiliary winding and an outer winding 9 that serves as a main winding, for example, are arranged near the outer periphery of the stator core 7.
  • the stator core 7 is formed by laminating a predetermined number of thin plates such as electromagnetic steel plates.
  • a shaft 6 having a stepped structure is passed through a shaft hole 7 a provided in the center of the stator core 7.
  • the stepped structure is a state in which a large diameter portion 6a and a small diameter portion 6b having different outer diameter dimensions are provided in the longitudinal direction 6e of the shaft 6.
  • a part of the shaft 6 is formed hollow, and a power connection line (not shown) for supplying power to the inner winding 8 and the outer winding 9 is passed through the shaft 6.
  • the step portion 6c formed in the large diameter portion 6a at the boundary between the large diameter portion 6a and the small diameter portion 6b is a surface orthogonal to the central axis of the shaft 6.
  • the small diameter portion 6 b of the shaft 6 is press-fitted into the shaft hole 7 a and the step portion 6 c is in contact with the upper end surface 7 b of the stator core 7. If the shaft 6 is slightly press-fitted into the shaft hole 7a and a part of the step portion 6c first reaches the upper end surface 7b of the stator core 7, the shaft 6 is further pressed, whereby the step portion The entire surface of 6c comes into contact with the upper end surface 7b of the stator core 7, and the inclination of the shaft 6 is corrected.
  • the large-diameter portion 6a may be formed in a flange shape between the small-diameter portions 6b. That is, it is only necessary to form a step portion 6c that is a surface orthogonal to the central axis (rotation axis) of the shaft 6 at the boundary between the lower surface of the flange-shaped large-diameter portion 6a and the lower small-diameter portion 6b. With this configuration, the diameter of the bearing 12 in FIG. 2 is reduced, and the material cost is reduced.
  • the stepped portion 6c does not have to be a plane.
  • An annular convex portion is formed on the lower surface of the large-diameter portion 6a, and the top portion may be parallel to a surface orthogonal to the central axis (rotating axis) of the shaft 6.
  • the rotor 10 is arranged by providing the outer winding 9 and the gap 11.
  • aluminum is cast in a thin laminated member such as an electromagnetic steel plate.
  • the rotor 10 is held and fixed by an upper cover 13 and a lower cover 14.
  • An upper cover 13 is rotatably locked to the rotor 10 by a bearing 12 attached above the shaft 6. That is, the rotor 10 rotates together with the upper cover 13 and the lower cover 14 via the bearing 12 attached to the shaft 6.
  • FIG. 4 is a partially enlarged cross-sectional view of the tip of the small diameter portion of the shaft of the abduction induction motor according to the embodiment of the present invention.
  • FIG. 4 shows the assembled state of the lower tip of the shaft 6 and the lower cover 14.
  • the lower tip of the small diameter portion 6b of the shaft 6 is a spherical tip portion 6d processed into a spherical shape.
  • a concave portion 14a for locking the spherical tip portion 6d is formed at the center of the lower cover 14. That is, the spherical tip 6d abuts on the recess 14a.
  • an annular standing portion 14c is provided on the outer periphery in the vicinity of the recess 14a.
  • a storage portion 14b is formed on the inner peripheral side of the standing portion 14c.
  • the storage part 14b is formed around the recessed part 14a.
  • a lubricant 15 is filled and held in the storage portion 14b.
  • the step 6c provided on the shaft 6 and the upper end surface 7b of the stator core 7 are in contact with each other, so that the perpendicularity between the shaft 6 and the stator core 7 is maintained. Therefore, the distance between the outer peripheral surface of the stator core 7 in the axial direction and the inner peripheral surface of the rotor 10 in the gap 11 shown in FIG. Therefore, the space
  • gap 11 can be narrowed, the operating efficiency of the external rotation induction motor 2 improves, and power saving is achieved.
  • the tip of the shaft 6 is in point contact with the lower cover 14. Therefore, friction is small without using a bearing, and the bearing 12 used is only the upper cover 13 as shown in FIG. That is, rationalization is achieved by reducing the number of parts.
  • the storage portion 14b is filled with the lubricant 15, and the tip of the shaft 6 and the lower cover 14 are in contact with each other in the storage portion 14b. That is, the tip of the small-diameter portion 6b of the shaft 6 and the contact surface of the lower cover 14 are lubricated, so that the life of the abduction induction motor 2 is extended.
  • the abduction type induction motor of the present invention is useful as a driving motor for a ceiling fan or the like.

Abstract

An external rotation-type induction motor (2) is provided with: a stator iron core (7) comprising, in the center thereof, a shaft hole through which a shaft (6) passes, and an inner winding (8) and an outer winding (9) that are arranged near the outer periphery; and a rotor (10) having provided thereto the outer winding (9) and a gap (11). The rotor (10) rotates together with an upper cover (13) and a lower cover (14) via a bearing (12). The shaft (6) has a stepped structure comprising a small-diameter section (6b) and a large-diameter section (6a) in the lengthwise direction thereof. The small-diameter section (6b) is pressed into and engaged with the shaft hole and a stepped section is brought into contact with the upper edge surface of the stator iron core (7).

Description

外転型誘導電動機およびそれを搭載した天井扇Abduction type induction motor and ceiling fan equipped with the same
　本発明は、外転型誘導電動機およびそれを搭載した天井扇に関する。 The present invention relates to an abduction type induction motor and a ceiling fan equipped with the induction motor.
　従来の外転型誘導電動機は、固定子鉄心の中央部に外径寸法一定の軸が固定されている。（例えば、特許文献１参照）。以下、従来の外転型誘導電動機について図５を参照しながら説明する。 In the conventional abduction induction motor, a shaft having a constant outer diameter is fixed at the center of the stator core. (For example, refer to Patent Document 1). A conventional abduction induction motor will be described below with reference to FIG.
　図５は、従来の外転型誘導電動機の断面図である。図５に示すように外転型誘導電動機１０２は、固定子鉄心１０７と、軸１０６と、回転子１１０とを備えている。ここで固定子鉄心１０７には、複数の内側巻線１０８と、複数の外側巻線１０９とが配置されている。軸１０６は、固定子鉄心１０７の中央部に取り付けられている。軸受１１２ａ、１１２ｂは、軸１０６の上下に配置されている。 FIG. 5 is a cross-sectional view of a conventional abduction induction motor. As shown in FIG. 5, the abduction induction motor 102 includes a stator core 107, a shaft 106, and a rotor 110. Here, a plurality of inner windings 108 and a plurality of outer windings 109 are arranged on the stator core 107. The shaft 106 is attached to the central portion of the stator core 107. The bearings 112 a and 112 b are disposed above and below the shaft 106.
　回転子１１０は、軸受１１２ａ、１１２ｂを介し、上カバー１１３と下カバー１１４とともに軸１０６の回りを回転する。また固定子鉄心１０７と、回転子１１０との間には、僅かな空隙１１１がある。このとき、固定子鉄心１０７と、軸１０６とは、一般的な圧入方法により固定される。 The rotor 110 rotates around the shaft 106 together with the upper cover 113 and the lower cover 114 via the bearings 112a and 112b. Further, there is a slight gap 111 between the stator core 107 and the rotor 110. At this time, the stator core 107 and the shaft 106 are fixed by a general press-fitting method.
特開２０１２－１８６８７５号公報JP 2012-186875 A
　このような従来の外転型誘導電動機では、以下のような課題を有している。 Such a conventional abduction induction motor has the following problems.
　一般的に外転型誘導電動機１０２の運転効率の向上のため、空隙１１１は出来るだけ狭められる。つまり固定子鉄心１０７に配置された内側巻線１０８と外側巻線１０９とにおいて発生する磁束が、有効に回転子１１０に伝播するようにするためである。 Generally, in order to improve the operation efficiency of the abduction induction motor 102, the gap 111 is narrowed as much as possible. That is, the magnetic flux generated in the inner winding 108 and the outer winding 109 arranged in the stator core 107 is effectively transmitted to the rotor 110.
　しかし固定子鉄心１０７に対して軸１０６が圧入により固定されているため、軸１０６と固定子鉄心１０７との組立て時における垂直度の精度確保が困難である。そのため空隙１１１における固定子鉄心１０７の外周面と、回転子１１０の内周面との軸方向の距離が不均一になり易くなる。上述の距離が不均一な状態において、空隙１１１が狭められると電磁気的な振動騒音が発生する。また固定子鉄心１０７の外周面と、回転子１１０の内周面とが接触して、摺動音などの異常音が発生する。また最悪の場合、外転型誘導電動機１０２が拘束状態になる。 However, since the shaft 106 is fixed by press-fitting to the stator core 107, it is difficult to ensure the accuracy of the perpendicularity when the shaft 106 and the stator core 107 are assembled. Therefore, the axial distance between the outer peripheral surface of the stator core 107 and the inner peripheral surface of the rotor 110 in the gap 111 is likely to be non-uniform. When the gap 111 is narrowed in the state where the distance is not uniform, electromagnetic vibration noise is generated. Further, the outer peripheral surface of the stator core 107 and the inner peripheral surface of the rotor 110 come into contact with each other, and abnormal noise such as sliding noise is generated. In the worst case, the abduction induction motor 102 is in a restrained state.
　そこで本発明の外転型誘導電動機は中心に軸を貫通させる軸孔を有し、外周近傍に内側巻線と外側巻線とが配置された固定子鉄心と、外側巻線と空隙を設けて配置された回転子とを備えている。回転子は、軸に取り付けた軸受を介して上側カバーと下側カバーとともに回転する。軸は、一部が中空に形成されて内部に電源接続線が通される。また軸は、長手方向に小径部と大径部とからなる段付き構造を有している。そして小径部が軸孔に圧入嵌合され、大径部に形成される段部が固定子鉄心の上端面に当接する。 Therefore, the outer rotation type induction motor of the present invention has a shaft hole that penetrates the shaft in the center, a stator core in which an inner winding and an outer winding are arranged near the outer periphery, an outer winding and a gap. And a disposed rotor. The rotor rotates together with the upper cover and the lower cover via a bearing attached to the shaft. A part of the shaft is hollow and a power supply connection line is passed through the shaft. The shaft has a stepped structure consisting of a small diameter portion and a large diameter portion in the longitudinal direction. The small-diameter portion is press-fitted into the shaft hole, and a step portion formed in the large-diameter portion abuts on the upper end surface of the stator core.
　そのため、このような外転型誘導電動機は軸が固定子鉄心と隙間なく固定されることにより、軸と固定子鉄心との垂直度が保たれ、空隙における固定子鉄心の外周面と回転子の内周面との軸方向の空間距離が均一になる。その結果、空隙寸法が狭められることにより外転型誘導電動機の運転効率が向上し、省電力化が図られる。 Therefore, in such an external rotation induction motor, the shaft is fixed to the stator core without a gap, so that the perpendicularity between the shaft and the stator core is maintained, and the outer peripheral surface of the stator core and the rotor in the gap are maintained. The axial distance from the inner peripheral surface is uniform. As a result, the gap size is narrowed, so that the operation efficiency of the abduction induction motor is improved and power saving is achieved.
図１は、本発明の実施の形態の外転型誘導電動機を搭載した天井扇を示す側面図である。FIG. 1 is a side view showing a ceiling fan on which an abduction type induction motor according to an embodiment of the present invention is mounted. 図２は、同外転型誘導電動機の部分断面図である。FIG. 2 is a partial cross-sectional view of the abduction induction motor. 図３Ａは、同外転型誘導電動機の固定子鉄心と軸の圧入部の部分拡大断面図である。FIG. 3A is a partially enlarged cross-sectional view of a stator core and a shaft press-fitting portion of the abduction induction motor. 図３Ｂは、同外転型誘導電動機の固定子鉄心と軸の圧入部の変形例１の部分拡大断面図である。FIG. 3B is a partially enlarged cross-sectional view of Modification 1 of the stator core and the shaft press-fitting portion of the abduction type induction motor. 図３Ｃは、同外転型誘導電動機の固定子鉄心と軸の圧入部の変形例２の部分拡大断面図である。FIG. 3C is a partially enlarged cross-sectional view of a second modification of the stator core and the shaft press-fitting portion of the abduction induction motor. 図４は、同外転型誘導電動機の軸の小径部先端の部分拡大断面図である。FIG. 4 is a partially enlarged cross-sectional view of the tip of the small diameter portion of the shaft of the abduction type induction motor. 図５は、従来の外転型誘導電動機の断面図である。FIG. 5 is a cross-sectional view of a conventional abduction induction motor.
　以下、本発明の実施の形態について図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　（実施の形態）
　図１は、本発明の実施の形態の外転型誘導電動機を搭載した天井扇の側面図である。天井扇１は、天井に取り付けられる扇風機であり、駆動源として外転型誘導電動機２が利用される。支柱４は、天井に下向きに固定されている。支柱４には、軸６を上方に突出させた外転型誘導電動機２が接続される。外転型誘導電動機２は、羽根３を備えている。外転型誘導電動機２の外側は、本体カバー５により覆われている。なお、本体カバー５が用いられずに、外転型誘導電動機２のハウジングが露出していてもよい。 (Embodiment)
FIG. 1 is a side view of a ceiling fan equipped with an abduction induction motor according to an embodiment of the present invention. The ceiling fan 1 is a fan attached to the ceiling, and an abduction induction motor 2 is used as a drive source. The support column 4 is fixed downward on the ceiling. An abduction induction motor 2 having a shaft 6 protruding upward is connected to the support column 4. The abduction induction motor 2 includes blades 3. The outer side of the abduction induction motor 2 is covered with a main body cover 5. In addition, the housing of the abduction induction motor 2 may be exposed without using the main body cover 5.
　図２は本発明の実施の形態の外転型誘導電動機の部分断面図、図３Ａは同外転型誘導電動機の固定子鉄心と軸の圧入部の部分拡大断面図、図３Ｂは同外転型誘導電動機の固定子鉄心と軸の圧入部の変形例１の部分拡大断面図、図３Ｃは同外転型誘導電動機の固定子鉄心と軸の圧入部の変形例２の部分拡大断面図である。 2 is a partial cross-sectional view of an abduction type induction motor according to an embodiment of the present invention, FIG. 3A is a partially enlarged cross-sectional view of a stator core and a shaft press-fitting portion of the abduction type induction motor, and FIG. FIG. 3C is a partially enlarged cross-sectional view of a second modification of the stator core and shaft press-fitting portion of the abduction type induction motor. FIG. is there.
　図２および図３Ａ～図３Ｃに示すように外転型誘導電動機２は、固定子鉄心７と回転子１０とを備えたコンデンサ誘導電動機である。外転型誘導電動機２には、固定子鉄心７の外周近傍に、例えば補助巻線となる内側巻線８と、例えば主巻線となる外側巻線９とが配置されている。ここで固定子鉄心７は、電磁鋼板などの薄板が所定枚数、積層されている。 As shown in FIG. 2 and FIGS. 3A to 3C, the abduction type induction motor 2 is a capacitor induction motor including a stator core 7 and a rotor 10. In the external rotation induction motor 2, an inner winding 8 that serves as an auxiliary winding and an outer winding 9 that serves as a main winding, for example, are arranged near the outer periphery of the stator core 7. Here, the stator core 7 is formed by laminating a predetermined number of thin plates such as electromagnetic steel plates.
　固定子鉄心７の中心に設けた軸孔７ａには、段付き構造の軸６が貫通されている。段付き構造とは、軸６の長手方向６ｅに外径寸法が異なる大径部６ａと小径部６ｂとを備えている状態である。軸６は、一部が中空に形成されて内部に内側巻線８と外側巻線９とに電源供給する電源接続線（図示せず）が通されている。 A shaft 6 having a stepped structure is passed through a shaft hole 7 a provided in the center of the stator core 7. The stepped structure is a state in which a large diameter portion 6a and a small diameter portion 6b having different outer diameter dimensions are provided in the longitudinal direction 6e of the shaft 6. A part of the shaft 6 is formed hollow, and a power connection line (not shown) for supplying power to the inner winding 8 and the outer winding 9 is passed through the shaft 6.
　そして図３Ａに示すように、大径部６ａと小径部６ｂとの境界の大径部６ａに形成される段部６ｃは、軸６の中心軸に対して直交する面である。軸６の小径部６ｂは、軸孔７ａに圧入嵌合されるとともに、段部６ｃは固定子鉄心７の上端面７ｂに当接している。仮に、軸６が僅かに斜めに軸孔７ａに圧入され、段部６ｃの一部が先に固定子鉄心７の上端面７ｂに達した場合、さらに軸６が押圧されることにより、段部６ｃの全面が固定子鉄心７の上端面７ｂに当接し、軸６の傾斜が矯正される。 3A, the step portion 6c formed in the large diameter portion 6a at the boundary between the large diameter portion 6a and the small diameter portion 6b is a surface orthogonal to the central axis of the shaft 6. The small diameter portion 6 b of the shaft 6 is press-fitted into the shaft hole 7 a and the step portion 6 c is in contact with the upper end surface 7 b of the stator core 7. If the shaft 6 is slightly press-fitted into the shaft hole 7a and a part of the step portion 6c first reaches the upper end surface 7b of the stator core 7, the shaft 6 is further pressed, whereby the step portion The entire surface of 6c comes into contact with the upper end surface 7b of the stator core 7, and the inclination of the shaft 6 is corrected.
　また図３Ｂに示すように小径部６ｂの間に大径部６ａが、フランジ状に形成されてもよい。すなわちフランジ状の大径部６ａの下面と下側の小径部６ｂとの境界に、軸６の中心軸（回転軸）と直交する面となる段部６ｃが形成されていればよい。この構成により、図２の軸受１２の径は小さくなり、材料費が低減される。 Further, as shown in FIG. 3B, the large-diameter portion 6a may be formed in a flange shape between the small-diameter portions 6b. That is, it is only necessary to form a step portion 6c that is a surface orthogonal to the central axis (rotation axis) of the shaft 6 at the boundary between the lower surface of the flange-shaped large-diameter portion 6a and the lower small-diameter portion 6b. With this configuration, the diameter of the bearing 12 in FIG. 2 is reduced, and the material cost is reduced.
　また図３Ｃに示すように段部６ｃは、平面である必要は無い。大径部６ａの下面に環状の凸部が形成され、その頂部が軸６の中心軸（回転軸）と直交する面と平行になればよい。 Further, as shown in FIG. 3C, the stepped portion 6c does not have to be a plane. An annular convex portion is formed on the lower surface of the large-diameter portion 6a, and the top portion may be parallel to a surface orthogonal to the central axis (rotating axis) of the shaft 6.
　そして外側巻線９と空隙１１を設けて、回転子１０が配置される。ここで回転子１０は、電磁鋼板などの薄板の積層部材にアルミニウムが鋳込まれている。回転子１０は、上側カバー１３と下側カバー１４とによって保持固定されている。また回転子１０には、軸６の上方に取り付けた軸受１２によって上側カバー１３が回転自在に係止されている。すなわち回転子１０は、軸６に取り付けた軸受１２を介して上側カバー１３と、下側カバー１４とともに回転する。 Then, the rotor 10 is arranged by providing the outer winding 9 and the gap 11. Here, in the rotor 10, aluminum is cast in a thin laminated member such as an electromagnetic steel plate. The rotor 10 is held and fixed by an upper cover 13 and a lower cover 14. An upper cover 13 is rotatably locked to the rotor 10 by a bearing 12 attached above the shaft 6. That is, the rotor 10 rotates together with the upper cover 13 and the lower cover 14 via the bearing 12 attached to the shaft 6.
　図４は、本発明の実施の形態の外転型誘導電動機の軸の小径部先端の部分拡大断面図である。図４には軸６の下方先端と、下側カバー１４との組付け状態が示されている。軸６の小径部６ｂの下方先端は、球面状に加工された球状先端部６ｄになっている。そして下側カバー１４の中央部には、球状先端部６ｄを係止する凹部１４ａが形成されている。すなわち球状先端部６ｄは、凹部１４ａに当接する。さらに凹部１４ａの近傍外周には、環状の立設部１４ｃが設けられている。立設部１４ｃの内周側には、収納部１４ｂが形成されている。このように収納部１４ｂが、凹部１４ａの周囲に形成されている。収納部１４ｂには、潤滑剤１５が充填、保持されている。 FIG. 4 is a partially enlarged cross-sectional view of the tip of the small diameter portion of the shaft of the abduction induction motor according to the embodiment of the present invention. FIG. 4 shows the assembled state of the lower tip of the shaft 6 and the lower cover 14. The lower tip of the small diameter portion 6b of the shaft 6 is a spherical tip portion 6d processed into a spherical shape. A concave portion 14a for locking the spherical tip portion 6d is formed at the center of the lower cover 14. That is, the spherical tip 6d abuts on the recess 14a. Further, an annular standing portion 14c is provided on the outer periphery in the vicinity of the recess 14a. A storage portion 14b is formed on the inner peripheral side of the standing portion 14c. Thus, the storage part 14b is formed around the recessed part 14a. A lubricant 15 is filled and held in the storage portion 14b.
　図３Ａ～図３Ｃに示すように軸６に設けた段部６ｃと、固定子鉄心７の上端面７ｂとが当接するので、軸６と固定子鉄心７との垂直度が保たれる。従って、図２に示す空隙１１における軸方向の固定子鉄心７の外周面と、回転子１０の内周面との距離が均一になる。そのため、空隙１１は狭くでき、外転型誘導電動機２の運転効率が向上し、省電力化が図られる。 As shown in FIGS. 3A to 3C, the step 6c provided on the shaft 6 and the upper end surface 7b of the stator core 7 are in contact with each other, so that the perpendicularity between the shaft 6 and the stator core 7 is maintained. Therefore, the distance between the outer peripheral surface of the stator core 7 in the axial direction and the inner peripheral surface of the rotor 10 in the gap 11 shown in FIG. Therefore, the space | gap 11 can be narrowed, the operating efficiency of the external rotation induction motor 2 improves, and power saving is achieved.
　また図４に示すように軸６の先端は、下側カバー１４に点接触している。そのため、軸受を使用せずとも摩擦が小さく、図２に示すように使用する軸受１２は上側カバー１３のみとなる。すなわち、部品点数削減による合理化が図られる。 Further, as shown in FIG. 4, the tip of the shaft 6 is in point contact with the lower cover 14. Therefore, friction is small without using a bearing, and the bearing 12 used is only the upper cover 13 as shown in FIG. That is, rationalization is achieved by reducing the number of parts.
　また図４に示すように収納部１４ｂに潤滑剤１５が充填され、収納部１４ｂ内において軸６の先端と、下側カバー１４とが接触している。すなわち、軸６の小径部６ｂ先端と、下側カバー１４の当接面とが潤滑されることになり、外転型誘導電動機２の長寿命化が図られる。 As shown in FIG. 4, the storage portion 14b is filled with the lubricant 15, and the tip of the shaft 6 and the lower cover 14 are in contact with each other in the storage portion 14b. That is, the tip of the small-diameter portion 6b of the shaft 6 and the contact surface of the lower cover 14 are lubricated, so that the life of the abduction induction motor 2 is extended.
　本発明の外転型誘導電動機は、天井扇等の駆動用電動機として有用である。 The abduction type induction motor of the present invention is useful as a driving motor for a ceiling fan or the like.
１　　天井扇
２　　外転型誘導電動機
３　　羽根
４　　支柱
５　　本体カバー
６　　軸
６ａ　　大径部
６ｂ　　小径部
６ｃ　　段部
６ｄ　　球状先端部
６ｅ　　長手方向
７　　固定子鉄心
７ａ　　軸孔
７ｂ　　上端面
８　　内側巻線
９　　外側巻線
１０　　回転子
１１　　空隙
１２　　軸受
１３　　上側カバー
１４　　下側カバー
１４ａ　　凹部
１４ｂ　　収納部
１４ｃ　　立設部
１５　　潤滑剤 DESCRIPTION OF SYMBOLS 1 Ceiling fan 2 External rotation induction motor 3 Blade | blade 4 Support | pillar 5 Main body cover 6 Shaft 6a Large diameter part 6b Small diameter part 6c Step part 6d Spherical tip part 6e Longitudinal direction 7 Stator core 7a Shaft hole 7b Upper end surface 8 Inner winding 9 Outer winding 10 Rotor 11 Gap 12 Bearing 13 Upper cover 14 Lower cover 14a Recess 14b Storage part 14c Standing part 15 Lubricant

Claims (4)

  1. 中心に軸を貫通させる軸孔を有し外周近傍に内側巻線と外側巻線とが配置された固定子鉄心と、
    前記外側巻線と空隙を設けて配置された回転子と、を備え、
    前記回転子は前記軸に取り付けた軸受を介して上側カバーと下側カバーとともに回転し、
    前記軸は一部が中空に形成されて内部に電源接続線が通されるとともに前記軸は長手方向に小径部と大径部とからなる段付き構造を有し、
    前記小径部が前記軸孔に圧入嵌合され、前記大径部に形成される段部が前記固定子鉄心の上端面に当接することを特徴とする外転型誘導電動機。     A stator core having a shaft hole penetrating the shaft in the center and having an inner winding and an outer winding disposed in the vicinity of the outer periphery;
    A rotor disposed with the outer winding and a gap,
    The rotor rotates with an upper cover and a lower cover via a bearing attached to the shaft,
    The shaft has a stepped structure consisting of a small diameter portion and a large diameter portion in the longitudinal direction while a part of the shaft is formed hollow and a power connection line is passed through the shaft.
    An abduction induction motor characterized in that the small-diameter portion is press-fitted into the shaft hole, and a step portion formed in the large-diameter portion abuts on an upper end surface of the stator core.
  2. 前記小径部は球状先端部を備え、
    前記球状先端部が前記下側カバーの中央部に設けた凹部に当接することを特徴とする請求項１記載の外転型誘導電動機。     The small diameter portion includes a spherical tip,
    The abduction induction motor according to claim 1, wherein the spherical tip is in contact with a recess provided in a central portion of the lower cover.
  3. 収納部が前記凹部の周囲に形成され、
    前記収納部は潤滑剤を保持することを特徴とする請求項２記載の外転型誘導電動機。     A storage part is formed around the recess,
    The abduction type induction motor according to claim 2, wherein the storage portion holds a lubricant.
  4. 請求項１記載の外転型誘導電動機を搭載したことを特徴とする天井扇。 A ceiling fan comprising the abduction type induction motor according to claim 1.
PCT/JP2014/000110 2013-01-28 2014-01-14 External rotation-type induction motor and ceiling fan equipped with same WO2014115501A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006902A (en) * 2015-07-07 2015-10-28 广东福耐特电气有限公司 Ceiling fan motor
WO2016199398A1 (en) * 2015-06-08 2016-12-15 パナソニックＩｐマネジメント株式会社 Brushless dc motor and blower device
CN107588020A (en) * 2016-07-06 2018-01-16 建准电机工业股份有限公司 Ceiling fan and motor thereof

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Publication number Priority date Publication date Assignee Title
JPS5913056U (en) * 1982-07-14 1984-01-26 三洋電機株式会社 Iron core of rotating electric machine
JPH0364695A (en) * 1989-08-01 1991-03-20 Matsushita Seiko Co Ltd Bearing device for ceiling electric fan
JP2002027721A (en) * 2000-05-27 2002-01-25 Minebea Co Ltd High-speed rotation spindle motor
JP2004278721A (en) * 2003-03-18 2004-10-07 Rikogaku Shinkokai Fluid dynamic bearing rotating mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913056U (en) * 1982-07-14 1984-01-26 三洋電機株式会社 Iron core of rotating electric machine
JPH0364695A (en) * 1989-08-01 1991-03-20 Matsushita Seiko Co Ltd Bearing device for ceiling electric fan
JP2002027721A (en) * 2000-05-27 2002-01-25 Minebea Co Ltd High-speed rotation spindle motor
JP2004278721A (en) * 2003-03-18 2004-10-07 Rikogaku Shinkokai Fluid dynamic bearing rotating mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016199398A1 (en) * 2015-06-08 2016-12-15 パナソニックＩｐマネジメント株式会社 Brushless dc motor and blower device
JPWO2016199398A1 (en) * 2015-06-08 2018-03-29 パナソニックＩｐマネジメント株式会社 Brushless DC motor, blower
CN105006902A (en) * 2015-07-07 2015-10-28 广东福耐特电气有限公司 Ceiling fan motor
CN107588020A (en) * 2016-07-06 2018-01-16 建准电机工业股份有限公司 Ceiling fan and motor thereof
CN107588020B (en) * 2016-07-06 2019-08-30 建准电机工业股份有限公司 Ceiling fan and motor thereof

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