JP2019075890A - Motor and method for manufacturing the same - Google Patents

Motor and method for manufacturing the same Download PDF

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Publication number
JP2019075890A
JP2019075890A JP2017200385A JP2017200385A JP2019075890A JP 2019075890 A JP2019075890 A JP 2019075890A JP 2017200385 A JP2017200385 A JP 2017200385A JP 2017200385 A JP2017200385 A JP 2017200385A JP 2019075890 A JP2019075890 A JP 2019075890A
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core back
cylindrical portion
back portion
small diameter
motor
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JP2017200385A
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JP6972890B2 (en
Inventor
宣 坂内
Noburu Sakauchi
宣 坂内
祐介 一岡
Yusuke Ichioka
祐介 一岡
義夫 黒川
Yoshio Kurokawa
義夫 黒川
貴洋 杉之原
Takahiro Suginohara
貴洋 杉之原
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Nidec Corp
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Nidec Corp
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Priority to JP2017200385A priority Critical patent/JP6972890B2/en
Priority to CN201821480873.7U priority patent/CN208986700U/en
Priority to CN201811054612.3A priority patent/CN109672285B/en
Publication of JP2019075890A publication Critical patent/JP2019075890A/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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • 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
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor

Abstract

To provide a motor that structurally couples a housing with a stator without deteriorating magnetic characteristics and can be downsized.SOLUTION: A motor comprises: a stator 5 that is located inside of a rotor magnet 4 in a radial direction and faces the rotor magnet via a gap; and a housing 6 having a cylindrical section 61 for holding the stator externally. A core back section 51 of the stator comprises: an upper core back section 511 including an upper side end section in an axial direction of the core back section and accommodates a bearing member 2 inside in the radial direction; a lower core back section 512 including a lower side end section in the axial direction of the core back section and faces the cylindrical section in the radial direction; and a small diameter section 513 arranged at a lower side in the axial direction of the upper core back section and at an upper side in the axial direction of the lower core back section and whose distance from a central axis to an inner peripheral surface is smaller than the upper core back section and the lower core back section. The small diameter section includes a recess recessed toward outside in the radial direction. An adhesive agent is accommodated in a gap between the cylindrical section and the small diameter section and in the recess.SELECTED DRAWING: Figure 1

Description

本発明はモータおよびモータの製造方法に関する。   The present invention relates to a motor and a method of manufacturing the motor.

従来のモータにおいて、ステータの径方向外側にマグネットが配置される、いわゆるアウターロータ型のモータが知られている。アウターロータ型のモータでは、ステータコアの径方向内側に、ステータを保持するための部材が配置されたり、モータの組み立て工程で、組み立て用の冶具が配置されたりする。   In a conventional motor, a so-called outer rotor type motor is known in which a magnet is disposed radially outward of a stator. In the outer rotor type motor, a member for holding the stator is disposed radially inward of the stator core, or a jig for assembly is disposed in the assembly process of the motor.

近年、アウターロータ型モータが搭載される装置の小型化に伴い、モータ自体を小径化することが求められている。モータの外径を規定する要素として、例えば、ステータコアのティースの径方向の長さ、ステータコアのコアバック部の径方向の長さ、がある。   In recent years, with the miniaturization of the apparatus on which the outer rotor type motor is mounted, it is required to reduce the diameter of the motor itself. For example, the radial length of the teeth of the stator core and the radial length of the core back portion of the stator core can be given as an element that defines the outer diameter of the motor.

特開１９９９−０８９１９６号公報JP, 1999-089196, A

特開１９９９−０８９１９６号公報に開示のモータにおいて、コアバック部の径方向の長さを短くして、モータの小型化を図ろうとすると、切欠部の配置によって磁気的特性が低下する。一方で、切欠部の深さを浅くすると、ハウジングの凸部とステータコアの凹部が係合されない可能性がある。   In the motor disclosed in JP-A-1999-089196, when attempting to miniaturize the motor by shortening the radial length of the core back portion, the arrangement of the notches reduces the magnetic characteristics. On the other hand, if the depth of the notch is reduced, the convex portion of the housing and the concave portion of the stator core may not be engaged.

本発明の目的は、磁気的特性を低下させることなく、ハウジングとステータとを構造的に締結する、小径化可能なモータを提供することである。   An object of the present invention is to provide a motor capable of reducing the diameter which structurally fastens the housing and the stator without deteriorating the magnetic characteristics.

本発明の例示的な一実施形態のモータは、中心軸を中心として回転し、中心軸に対して上下に延びるシャフトと、シャフトを回転可能に支持する軸受部材と、シャフトに連結され、下向きに開口するカップ形状のロータハブと、ロータハブの径方向内側に保持されるロータマグネットと、ロータマグネットの径方向内側に位置し、ロータマグネットと間隙を介して対向するステータと、外側にステータを保持する筒部を有する、ハウジングと、を備え、ステータは、環状のコアバック部と、コアバック部の外周から径方向外側に延びる複数のティースと、ティースに導電線が巻回されてなるコイルと、を有し、コアバック部は、コアバック部の軸方向上側端部を含み、径方向内側に軸受部材を収容する上コアバック部と、コアバック部の軸方向下側端部を含み、筒部と径方向に対向する下コアバック部と、上コアバック部の軸方向下側および下コアバック部の軸方向上側に配置され、上コアバック部および下コアバック部よりも、中心軸から内周面までの距離の小さい小径部と、を有し、小径部は、径方向外側に向かって凹む凹部を有し、筒部と小径部との間隙、および凹部には接着剤が収容されている。   A motor according to an exemplary embodiment of the present invention is connected to a shaft that rotates around a central axis and extends up and down with respect to the central axis, a bearing member that rotatably supports the shaft, and the shaft downward An open cup-shaped rotor hub, a rotor magnet held on the radially inner side of the rotor hub, a stator positioned radially inward of the rotor magnet and opposed to the rotor magnet with a gap, and a cylinder for holding the stator on the outer side A housing including a housing, the stator including an annular core back portion, a plurality of teeth extending radially outward from an outer periphery of the core back portion, and a coil formed by winding a conductive wire around the teeth The core back portion includes the axially upper end portion of the core back portion, and the upper core back portion accommodating the bearing member radially inward and the axial direction of the core back portion The lower core back portion including the lower end portion, which is radially opposed to the cylindrical portion, and the axially lower side of the upper core back portion and the axially upper side of the lower core back portion, the upper core back portion and the lower core A smaller diameter portion having a smaller distance from the central axis to the inner circumferential surface than the back portion, and the smaller diameter portion has a concave portion recessed outward in the radial direction, and a gap between the cylindrical portion and the smaller diameter portion, An adhesive is contained in the recess.

本発明の例示的な一実施形態のモータの製造方法は、中心軸を中心とする環状のコアバック部と、コアバック部の外周から径方向外側に延びる複数のティースと、を有するステータと、中心軸に対して上下に延びる筒部を有する、ハウジングと、を備え、コアバック部は、コアバック部の軸方向上側端部を含む上コアバック部と、コアバック部の軸方向下側端部を含む下コアバック部と、上コアバック部の軸方向下側および下コアバック部の軸方向上側に配置され、上コアバック部および下コアバック部よりも、中心軸から内周面までの距離の小さい小径部と、を有し、小径部が、径方向外側に向かって凹む凹部を有する、モータの製造方法であって、ａ）巻線機のピンに設けられた凸部を、凹部に固定し、ティースに導電線を巻回してコイルを形成する工程と、ｂ）筒部の下方を第１冶具の上面に配置する工程と、ｃ）筒部の上方から、小径部の上面に第２冶具の下面を接触させて、ステータを筒部の径方向外側に固定する工程と、を含む。   A method of manufacturing a motor according to an exemplary embodiment of the present invention comprises: a stator having an annular core back portion centered on a central axis; and a plurality of teeth extending radially outward from the outer periphery of the core back portion; A housing having a cylindrical portion extending vertically with respect to the central axis, wherein the core back portion includes an upper core back portion including an axially upper end portion of the core back portion, and an axially lower end of the core back portion The lower core back portion including the lower core portion, and the axially lower side of the upper core back portion and the axially upper side of the lower core back portion, from the central axis to the inner circumferential surface than the upper core back portion and the lower core back portion A method of manufacturing a motor, comprising: a small diameter portion having a small distance, and the small diameter portion having a concave portion recessed outward in the radial direction, and a) a convex portion provided on a pin of a winding machine, Fix in the recess and wind the conductive wire around the teeth to B) placing the lower part of the cylindrical part on the upper surface of the first jig, and c) bringing the lower surface of the second jig into contact with the upper surface of the small diameter part from above the cylindrical part to make the stator And a fixing step on the radially outer side of the part.

本発明に係る例示的なモータによれば、磁気的特性を低下させることなく、ハウジングとステータとを構造的に締結し、かつ、モータを小径化できる。   According to the exemplary motor of the present invention, it is possible to structurally fasten the housing and the stator and reduce the diameter of the motor without degrading the magnetic characteristics.

図１は、本発明の実施形態におけるモータの断面を示す概略図である。FIG. 1 is a schematic view showing a cross section of a motor according to an embodiment of the present invention. 図２は、本発明の実施形態におけるモータのコアバック部およびティースの上面図である。FIG. 2 is a top view of a core back portion and teeth of a motor according to an embodiment of the present invention. 図３は、本発明の実施形態に係るモータのティースに導電線を巻回してコイルを形成する工程を説明するための図である。FIG. 3 is a view for explaining a process of forming a coil by winding a conductive wire around teeth of a motor according to an embodiment of the present invention. 図４は、本発明の実施形態におけるモータの一部を拡大して示す部分断面図である。FIG. 4 is a partial cross-sectional view showing a part of the motor in the embodiment of the present invention in an enlarged manner. 図５は、本発明の実施形態におけるモータのステータがハウジングに固定された状態を示した断面図である。FIG. 5 is a cross-sectional view showing a state in which the stator of the motor in the embodiment of the present invention is fixed to the housing.

以下、本発明の例示的な実施形態について、図面を参照しながら詳細に説明する。本明細書では、図１に示す中心軸Jに沿う方向を軸方向、中心軸Jに直交する方向を径方向、中心軸Jを中心とする円弧に沿う方向を周方向と称する。また、本明細書では、軸方向を上下方向とし、モータ１０に対してロータハブ３側を上として、各部の形状や位置関係を説明する。ただし、この上下方向の定義により、本発明のモータ１０の使用時の向きを限定する意図はない。   Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, a direction along the central axis J shown in FIG. 1 is referred to as an axial direction, a direction orthogonal to the central axis J as a radial direction, and a direction along an arc centered on the central axis J as a circumferential direction. Further, in the present specification, with the axial direction as the vertical direction and the rotor hub 3 side up with respect to the motor 10, the shapes and positional relationships of the respective parts will be described. However, there is no intention to limit the use direction of the motor 10 of the present invention based on the definition in the vertical direction.

図１は、本発明の例示的な一実施形態に係るモータ１０の全体構成を示した断面図である。 モータ１０は、たとえば、小型の無人飛行機（不図示）に搭載されて翼部を回転させる。なお、この例示に限定されず、モータ１０は、たとえば、ＯＡ機器や医療機器、工具、産業用の大型設備などに搭載されて種々の駆動力を発生させてもよい。モータ１０は、シャフト１と、軸受部材２と、ロータハブ３と、ロータマグネット４と、ステータ５と、ハウジング６と、を備える。   FIG. 1 is a cross-sectional view showing the overall configuration of a motor 10 according to an exemplary embodiment of the present invention. The motor 10 is mounted, for example, on a small unmanned aerial vehicle (not shown) to rotate its wings. In addition, it is not limited to this illustration, For example, motor 10 may be mounted in OA apparatus, a medical device, a tool, a large-scale installation for industrial use, etc., and may generate various driving force. The motor 10 includes a shaft 1, a bearing member 2, a rotor hub 3, a rotor magnet 4, a stator 5 and a housing 6.

シャフト１は、中心軸Ｊを中心として回転し、中心軸Ｊに対して上下に延びる。軸受部材２は、シャフト１を回転可能に支持する。軸受部材２は、シャフト１の外周に取り付けられる。本実施形態では、軸受部材２はボールベアリングである。また、軸受部材２は、上下方向に２つ設けられる。   The shaft 1 rotates about a central axis J and extends up and down with respect to the central axis J. The bearing member 2 rotatably supports the shaft 1. The bearing member 2 is attached to the outer periphery of the shaft 1. In the present embodiment, the bearing member 2 is a ball bearing. Further, two bearing members 2 are provided in the vertical direction.

ロータハブ３は、シャフト１に連結され、下向きに開口するカップ形状である。ロータハブ３は、円筒状のマグネット保持部３１と、マグネット保持部３１から径方向内側に延びる平板部３２と、平板部３２の中央から軸方向下側に延び、かつ軸方向に貫通する円筒状の連結部３３と、を有する。ロータハブ３は、連結部３３において、シャフト１の軸受部材２の固定される部位より上側に固定される。つまり、連結部３３の円筒状の内周面は、シャフト１の外周面と、接着剤または圧入によって固定される。   The rotor hub 3 is connected to the shaft 1 and has a cup shape opening downward. The rotor hub 3 is a cylindrical magnet holding portion 31, a flat plate portion 32 extending radially inward from the magnet holding portion 31, and a cylindrical shape extending axially downward from the center of the flat plate portion 32 and penetrating in the axial direction. And a connecting portion 33. The rotor hub 3 is fixed at the connecting portion 33 above the fixed portion of the bearing member 2 of the shaft 1. That is, the cylindrical inner peripheral surface of the connection portion 33 is fixed to the outer peripheral surface of the shaft 1 by an adhesive or press fitting.

ロータマグネット４は、ロータハブ３の径方向内側に保持される。本実施形態において、ロータマグネット４は、マグネット保持部３１の内周面に固定される。ロータマグネット４の内周面とステータ５とは、径方向に間隙を介して対向する。ロータハブ３とロータマグネット４とは、接着または圧入によって固定される。平板部３２は、軸方向に貫通する複数の貫通孔３４を有する。モータ１０の回転によってステータ５から発生した熱い空気は、貫通孔３４を通じてモータ１０の外部に排出される。   The rotor magnet 4 is held radially inward of the rotor hub 3. In the present embodiment, the rotor magnet 4 is fixed to the inner circumferential surface of the magnet holding portion 31. The inner circumferential surface of the rotor magnet 4 and the stator 5 face each other in the radial direction with a gap. The rotor hub 3 and the rotor magnet 4 are fixed by bonding or press-fitting. The flat plate portion 32 has a plurality of through holes 34 penetrating in the axial direction. Hot air generated from the stator 5 by the rotation of the motor 10 is discharged to the outside of the motor 10 through the through holes 34.

ステータ５は、ロータマグネット４の径方向内側に位置し、ロータマグネット４と間隙を介して対向する。ステータ５は環状のコアバック部５１と、コアバック部５１の外周から径方向外側に延びる複数のティース５２と、ティース５２に導電線が巻回されてなるコイル５３と、を有する。本実施形態において、コアバック部５１およびティース５２は、強磁性体である薄い鋼鈑を複数積層されてなる。ティース５２において、導電線の巻回される部位とその周辺とには、絶縁塗装が行われる。なお、コアバック部５１およびティース５２は、金属粉末を金型に用いて圧縮成形して作成する、圧粉鉄心であってもよい。   The stator 5 is located radially inward of the rotor magnet 4 and faces the rotor magnet 4 via a gap. The stator 5 has an annular core back portion 51, a plurality of teeth 52 extending radially outward from the outer periphery of the core back portion 51, and a coil 53 formed by winding a conductive wire around the teeth 52. In the present embodiment, the core back portion 51 and the teeth 52 are formed by laminating a plurality of thin steel plates which are ferromagnetic members. In the teeth 52, insulation coating is performed on the winding portion of the conductive wire and the periphery thereof. The core back portion 51 and the teeth 52 may be a dust core formed by compression molding using a metal powder as a mold.

コアバック部５１は、コアバック部５１の軸方向上側端部を含む上コアバック部５１１と、コアバック部５１の軸方向下側端部を含む下コアバック部５１２と、上コアバック部５１１の軸方向下側および下コアバック部５１２の軸方向上側に配置される小径部５１３と、を有する。上コアバック部５１１は、径方向内側に軸受部材２を収容する。言い換えると、軸受部材２は、上コアバック部５１１の内周面に直接又は接着剤を介して保持される。本実施形態において、軸受部材２の外輪の下面と小径部５１３の上面とは、直接又は予圧ばねを介して軸方向に対向する。下コアバック部５１２は、後述する筒部６１と径方向に対向する。   The core back portion 51 includes an upper core back portion 511 including an axial upper end portion of the core back portion 51, a lower core back portion 512 including an axial lower end portion of the core back portion 51, and an upper core back portion 511. And a small diameter portion 513 disposed on the axial direction upper side of the lower core back portion 512. The upper core back portion 511 accommodates the bearing member 2 radially inward. In other words, the bearing member 2 is held on the inner peripheral surface of the upper core back portion 511 directly or through an adhesive. In the present embodiment, the lower surface of the outer ring of the bearing member 2 and the upper surface of the small diameter portion 513 axially face each other directly or via a preload spring. The lower core back portion 512 radially faces the cylindrical portion 61 described later.

小径部５１３は、上コアバック部５１１および下コアバック部５１２よりも、中心軸Ｊから内周面までの距離が小さい。言い換えると、小径部５１３は上コアバック部５１１および下コアバック部５１２よりも中心軸Ｊに向かって突出する。   The small diameter portion 513 has a smaller distance from the central axis J to the inner circumferential surface than the upper core back portion 511 and the lower core back portion 512. In other words, the small diameter portion 513 protrudes toward the central axis J more than the upper core back portion 511 and the lower core back portion 512.

ハウジング６は、径方向外側にステータ５を保持する筒部６１を有する。さらに、ハウジング６は、ステータ５よりも軸方向下側において軸受部材２を収容する軸受収容部２１を有する。本実施形態において、上側の軸受部材２はステータ５の上コアバック部５１１に収容され、下側の軸受部材２はハウジング６の軸受収容部２１に収容される。筒部６１は、第１筒部６１１と、第２筒部６１２と、第３筒部６１３と、を有する。第１筒部６１１は、小径部５１３と径方向に対向する。第２筒部６１２は、第１筒部６１１の下方において、第１筒部６１１よりも、中心軸Jから外周面までの距離が大きく、下コアバック部５１２と径方向に対向する。   The housing 6 has a cylindrical portion 61 that holds the stator 5 radially outward. Furthermore, the housing 6 has a bearing accommodating portion 21 that accommodates the bearing member 2 axially below the stator 5. In the present embodiment, the upper bearing member 2 is accommodated in the upper core back portion 511 of the stator 5, and the lower bearing member 2 is accommodated in the bearing accommodating portion 21 of the housing 6. The cylindrical portion 61 includes a first cylindrical portion 611, a second cylindrical portion 612, and a third cylindrical portion 613. The first cylindrical portion 611 faces the small diameter portion 513 in the radial direction. The second cylindrical portion 612 has a larger distance from the central axis J to the outer peripheral surface below the first cylindrical portion 611 than the first cylindrical portion 611, and is opposed to the lower core back portion 512 in the radial direction.

第３筒部６１３は、第２筒部６１２よりも下方において、第２筒部６１２よりも、中心軸Jから外周面までの距離が大きい。本実施形態において、軸受収容部２１は、第３筒部６１３に設けられ、下方に開口する。すなわち、第３筒部６１３には軸受部材２が配置される。軸受部材２は、下方から軸受収容部２１内に収容される。すなわち、軸受部材２は下方から第３筒部６１３内に収容される。軸受部材２の外周面は、第３筒部６１３の内周面と接着剤を介して固定される。   The third cylindrical portion 613 has a larger distance from the central axis J to the outer circumferential surface than the second cylindrical portion 612 below the second cylindrical portion 612. In the present embodiment, the bearing accommodating portion 21 is provided in the third cylindrical portion 613 and opens downward. That is, the bearing member 2 is disposed in the third cylindrical portion 613. The bearing member 2 is accommodated in the bearing accommodating portion 21 from below. That is, the bearing member 2 is accommodated in the third cylindrical portion 613 from below. The outer peripheral surface of the bearing member 2 is fixed to the inner peripheral surface of the third cylindrical portion 613 via an adhesive.

図２は、本発明の実施形態におけるステータ５のコアバック部５１およびティース５２の上面図である。図２に示すように、小径部５１３は、径方向外側に向かって凹む凹部５１４を有する。筒部６１と小径部５１３との間隙、および凹部５１４には接着剤１１が収容される。これにより、ステータ５とハウジング６とを強固に固定することができる。また、小径部５１３に凹部５１４が設けられるため、凹部５１４の形成によって磁気的特性が低下することを抑制できる。   FIG. 2 is a top view of the core back portion 51 and the teeth 52 of the stator 5 in the embodiment of the present invention. As shown in FIG. 2, the small diameter portion 513 has a recess 514 that is recessed radially outward. The adhesive 11 is accommodated in the gap between the cylindrical portion 61 and the small diameter portion 513 and the concave portion 514. Thereby, the stator 5 and the housing 6 can be fixed firmly. In addition, since the concave portion 514 is provided in the small diameter portion 513, it is possible to suppress the deterioration of the magnetic characteristics due to the formation of the concave portion 514.

図３は、本発明の実施形態におけるステータ５のティース５２に導電線を巻回してコイル５３を形成する工程を説明するための図である。ロータハブ３が小型化する場合、コアバック部５１の径方向の厚みも薄くなる。例えば、コイル５３を形成する場合、巻線機のピン８に設けられた凸部８１を凹部５１４に配置して位置決めをする。このとき、上コアバック部５１１または下コアバック部５１２に凹部５１４を設けると、凹部５１４の深さが浅くなる、または、磁気的特性が低下する虞がある。本実施形態において、ロータハブ３の外径は、１１ｍｍ以下である。このような小型のモータ１０において凹部５１４の深さが浅くなると、凹部５１４と凸部８１での保持力が小さくなり、凸部８１が凹部５１４から抜ける可能性がある。本実施形態において、凹部５１４は小径部５１３に設けられるため、小型のモータ１０においても、凹部５１４の深さをより深くすることができる。   FIG. 3 is a view for explaining a process of forming a coil 53 by winding a conductive wire around the teeth 52 of the stator 5 in the embodiment of the present invention. When the rotor hub 3 is miniaturized, the radial thickness of the core back portion 51 is also reduced. For example, when the coil 53 is formed, the convex portion 81 provided on the pin 8 of the winding machine is disposed in the concave portion 514 for positioning. At this time, when the concave portion 514 is provided in the upper core back portion 511 or the lower core back portion 512, the depth of the concave portion 514 may be reduced or the magnetic characteristics may be deteriorated. In the present embodiment, the outer diameter of the rotor hub 3 is 11 mm or less. When the depth of the concave portion 514 is reduced in such a small motor 10, the holding force between the concave portion 514 and the convex portion 81 may be reduced, and the convex portion 81 may come out of the concave portion 514. In the present embodiment, since the concave portion 514 is provided in the small diameter portion 513, the depth of the concave portion 514 can be made deeper even in the small-sized motor 10.

本実施形態において、第２筒部６１２は、下コアバック部５１２と径方向に対向する。これにより、ステータ５とハウジング６との固定方法を、小径部５１３および第１筒部６１１の間と、下コアバック部５１２および第２筒部６１２の間と、で異なる方法を用いることができる。本実施形態では、例えば、第１筒部６１１の外周面と小径部５１３の内周面とは間隙を有し、さらに当該間隙において接着剤１１を介して対向する。第２筒部６１２の外周面と下コアバック部５１２の内周面とは圧入にて固定される。これにより、例えば、小径部５１３の内周面の中心軸と下コアバック部５１２の内周面の中心軸とがずれている場合、当該ずれ量を第１筒部６１１の外周面と小径部５１３の内周面との間隙にて調整し、第１筒部６１１の外周面と小径部５１３とが接触することによるコアバック部５１への応力が偏ることが抑制される。   In the present embodiment, the second cylindrical portion 612 radially faces the lower core back portion 512. Thereby, a different method of fixing stator 5 and housing 6 can be used between the small diameter portion 513 and the first cylindrical portion 611 and between the lower core back portion 512 and the second cylindrical portion 612. . In the present embodiment, for example, the outer circumferential surface of the first cylindrical portion 611 and the inner circumferential surface of the small diameter portion 513 have a gap, and further, they face each other through the adhesive 11 in the gap. The outer peripheral surface of the second cylindrical portion 612 and the inner peripheral surface of the lower core back portion 512 are fixed by press-fitting. Thereby, for example, when the central axis of the inner peripheral surface of the small diameter portion 513 and the central axis of the inner peripheral surface of the lower core back portion 512 are deviated, the deviation amount corresponds to the outer peripheral surface of the first cylindrical portion 611 and the small diameter portion By adjusting the gap with the inner circumferential surface 513, it is possible to suppress the stress on the core back portion 51 due to the contact between the outer circumferential surface of the first cylindrical portion 611 and the small diameter portion 513.

図４は、本発明の実施形態におけるモータの一部を拡大して示す部分断面図である。第２筒部６１２の外周面は、上端に中心軸Ｊに対して傾斜する傾斜面６１４を有する。これにより、傾斜面６１４と、小径部５１３の下面と、下コアバック部５１２の内周面と、の間には空間７が形成される。第１筒部６１１の外周面と、小径部５１３の内周面との間に介在する接着剤１１は、第１筒部６１１を小径部５１３に固定するときに、接着剤１１は空間７に流入する。すなわち、空間７には接着剤１１の少なくとも一部が配置される。これにより、接着剤１１が上側に流出し、軸受部材２側に流出することを抑制できる。   FIG. 4 is a partial cross-sectional view showing a part of the motor in the embodiment of the present invention in an enlarged manner. The outer peripheral surface of the second cylindrical portion 612 has an inclined surface 614 inclined with respect to the central axis J at the upper end. Thus, a space 7 is formed between the inclined surface 614, the lower surface of the small diameter portion 513, and the inner peripheral surface of the lower core back portion 512. In the adhesive 11 interposed between the outer peripheral surface of the first cylindrical portion 611 and the inner peripheral surface of the small diameter portion 513, the adhesive 11 is in the space 7 when the first cylindrical portion 611 is fixed to the small diameter portion 513. To flow. That is, at least a part of the adhesive 11 is disposed in the space 7. Thus, the adhesive 11 can be prevented from flowing out to the upper side and flowing out to the bearing member 2 side.

本実施形態において、第２筒部６１２と下コアバック部５１２との圧入領域は、第１筒部６１１と小径部５１３との接着領域よりも軸方向下側かつ径方向外側に位置する。当該圧入領域が、第１筒部６１１と小径部５１３との接着領域よりも軸方向下側かつ径方向外側に位置することで、ステータ５とハウジング６との組立時に接着剤１１を圧入領域で堰き止めることができ、接着剤１１を接着領域に保持することができる。つまり、接着剤１１を第２筒部６１２の下方に流出することを抑制できる。   In the present embodiment, the press-fit region of the second cylindrical portion 612 and the lower core back portion 512 is located axially lower than the bonding region of the first cylindrical portion 611 and the small diameter portion 513 and radially outward. The press-fit area is located axially lower and radially outward than the bonding area between the first cylindrical portion 611 and the small-diameter portion 513 so that the adhesive 11 is press-fit area when assembling the stator 5 and the housing 6. It is possible to hold back and hold the adhesive 11 in the bonding area. That is, the adhesive 11 can be suppressed from flowing out to the lower side of the second cylindrical portion 612.

モータ１０において、圧入と接着とを併用することでステータ５とハウジング６とを強固に固定することができる。また、接着固定において、組立時の接着剤１１の流出を抑制するために圧入領域を接着領域よりも軸方向下側かつ径方向外側に配置することで接着剤１１がステータ５とハウジング６との間隙に保持され、接着強度を確保することができる。   In the motor 10, the stator 5 and the housing 6 can be firmly fixed by using press-fitting and bonding together. Further, in adhesion and fixing, in order to suppress the outflow of the adhesive 11 at the time of assembly, the adhesive 11 is disposed between the stator 5 and the housing 6 by arranging the press-in area axially lower than the adhesion area and radially outward. It can be held in the gap to secure the adhesive strength.

次に、本実施形態におけるモータ１０の製造工程について説明する。   Next, the manufacturing process of the motor 10 in the present embodiment will be described.

上述したように、このモータ１０に備えられているステータ５は、中心軸Ｊを中心とする環状のコアバック部５１と、コアバック部５１の外周から径方向外側に延びる複数のティース５２と、を有する。さらに、このモータ１０は、中心軸Ｊに対して上下に延びる筒部６１を有するハウジング６と、を備える。   As described above, the stator 5 provided in the motor 10 has an annular core back portion 51 centered on the central axis J, and a plurality of teeth 52 extending radially outward from the outer periphery of the core back portion 51; Have. The motor 10 further includes a housing 6 having a cylindrical portion 61 extending vertically with respect to the central axis J.

上述したように、このモータ１０に備えられているステータ５のコアバック部５１は、コアバック部５１の軸方向上側端部を含む上コアバック部５１１と、コアバック部５１の軸方向下側端部を含む下コアバック部５１２と、上コアバック部５１１の軸方向下側および下コアバック部５１２の軸方向上側に配置され、上コアバック部５１１および下コアバック部５１２よりも、中心軸Ｊから内周面までの距離の小さい小径部５１３と、を有し、小径部５１３が、径方向外側に向かって凹む凹部５１４を有する。   As described above, the core back portion 51 of the stator 5 provided in the motor 10 includes the upper core back portion 511 including the axial upper end portion of the core back portion 51 and the axial lower side of the core back portion 51. The lower core back portion 512 including the end portion and the axially lower side of the upper core back portion 511 and the axial direction upper side of the lower core back portion 512 are disposed, and the center is closer to the center than the upper core back portion 511 and the lower core back portion 512 The small diameter portion 513 has a small distance from the axis J to the inner circumferential surface, and the small diameter portion 513 has a concave portion 514 that is concaved radially outward.

本実施形態におけるモータ１０の製造方法は、コイル５３を形成する工程と、ハウジング６の筒部６１を第１冶具９１に配置する工程と、ステータ５を筒部６１に固定する工程と、を含む。   The method of manufacturing the motor 10 in the present embodiment includes the steps of forming the coil 53, disposing the cylindrical portion 61 of the housing 6 on the first jig 91, and fixing the stator 5 to the cylindrical portion 61. .

図３は、本発明の実施形態におけるステータ５のティース５２に導電線を巻回してコイル５３を形成する工程を説明するための図である。巻線機のピン８には凸部８１が配置される。巻線機のピン８に設けられた凸部８１を、上述の凹部５１４に固定する。これにより、コアバック部５１およびティース５２が巻線機に位置決めされる。位置決めされたティース５２に、導電線を巻回してコイル５３を形成する。上述のように、凹部５１４は小径部５１３に設けられるため、小型のモータ１０においても、凹部５１４の深さをより深くすることができる。そのため、巻線機に取り付けた際にコアバック部５１およびティース５２が移動することを抑制できる。   FIG. 3 is a view for explaining a process of forming a coil 53 by winding a conductive wire around the teeth 52 of the stator 5 in the embodiment of the present invention. A protrusion 81 is disposed on the pin 8 of the winding machine. The convex portion 81 provided on the pin 8 of the winding machine is fixed to the above-mentioned concave portion 514. As a result, the core back portion 51 and the teeth 52 are positioned on the winding machine. A conductive wire is wound around the positioned teeth 52 to form a coil 53. As described above, since the recess 514 is provided in the small diameter portion 513, the depth of the recess 514 can be made deeper even in the small motor 10. Therefore, it can suppress that the core back part 51 and the teeth 52 move at the time of attaching to a winding machine.

図５は、本発明の実施形態におけるモータ１０のステータ５がハウジング６に固定された状態を示した断面図である。ハウジング６の筒部６１の下方を第１冶具９１の上面に配置する。第１冶具９１に配置した筒部６１の上方から、ステータ５を筒部６１の径方向外側に固定する。このとき、小径部５１３の上面に第２冶具９２の下面を接触させる。これにより、ステータ５に力が加わり、ステータ５が筒部６１の径方向外側に固定される。   FIG. 5 is a cross-sectional view showing a state in which the stator 5 of the motor 10 according to the embodiment of the present invention is fixed to the housing 6. The lower side of the cylindrical portion 61 of the housing 6 is disposed on the upper surface of the first jig 91. The stator 5 is fixed to the radially outer side of the cylindrical portion 61 from the upper side of the cylindrical portion 61 disposed in the first jig 91. At this time, the lower surface of the second jig 92 is brought into contact with the upper surface of the small diameter portion 513. Thereby, a force is applied to the stator 5, and the stator 5 is fixed to the outside in the radial direction of the cylindrical portion 61.

上述のように、ティース５２において、導電線の巻回される部位とその周辺とには、絶縁塗装が行われている。コイル５３周辺のコアバック部５１の上面に第２冶具９２の下面を接触させる場合、コイル５３周辺の絶縁塗装が第２冶具９２に接触する可能性がある。本実施形態では、小径部５１３の上面に第２冶具９２の下面を接触させて力を加える。コイル５３周辺の絶縁塗装に第２冶具９２が接触しないため、絶縁塗装が剥げたり、薄くなったりすることを抑制できる。   As described above, in the teeth 52, the insulating coating is performed on the winding portion of the conductive wire and the periphery thereof. When the lower surface of the second jig 92 is brought into contact with the upper surface of the core back portion 51 around the coil 53, the insulating paint around the coil 53 may come in contact with the second jig 92. In the present embodiment, a force is applied by bringing the lower surface of the second jig 92 into contact with the upper surface of the small diameter portion 513. Since the second jig 92 does not contact the insulating coating around the coil 53, it is possible to suppress peeling or thinning of the insulating coating.

本実施形態におけるモータ１０の製造方法は、小径部５１３と径方向に対向する第１筒部６１１と、第１筒部６１１の下方において、前記第１筒部６１１よりも、中心軸Ｊから外周面までの距離が大きい第２筒部６１２と、を有する筒部６１を準備する工程を含む。これにより、ステータ５とハウジング６との固定方法を、小径部５１３および第１筒部６１１の間と、下コアバック部５１２および第２筒部６１２の間と、で異なる方法を用いることができる。   In the method of manufacturing the motor 10 according to this embodiment, the outer periphery from the central axis J is smaller than the first cylindrical portion 611 below the first cylindrical portion 611 facing the small diameter portion 513 and the first cylindrical portion 611. The process of preparing the cylinder part 61 which has the 2nd cylinder part 612 with large distance to a surface is included. Thereby, a different method of fixing stator 5 and housing 6 can be used between the small diameter portion 513 and the first cylindrical portion 611 and between the lower core back portion 512 and the second cylindrical portion 612. .

本実施形態におけるモータ１０の製造方法は、ステータ５を筒部６１に固定する工程の後に、小径部５１３の上方から、上コアバック部５１１に軸受部材２を固定する工程を含む。   The method of manufacturing the motor 10 in the present embodiment includes the step of fixing the bearing member 2 to the upper core back portion 511 from above the small diameter portion 513 after the step of fixing the stator 5 to the cylindrical portion 61.

本実施形態において、ステータ５を筒部６１に固定する工程において、下コアバック部５１２の内周面は、第２筒部６１２の外周面に圧入される。さらに、ステータ５を筒部６１に固定する工程は、ステータ５を筒部６１に固定した後、第１筒部６１１の外周面または小径部５１３の内周面にいずれかに接着剤１１を塗布する工程を含む。すなわち、第１筒部６１１と小径部５１３とは、接着剤１１により固定される。下コアバック部５１２の内周面が小径部５１３の内周面よりも大きいことで、下コアバック部５１２の内周面が、第１筒部６１１の外周面に塗布された接着剤１１に接触することなく、ステータ５をハウジング６へ固定することができる。つまり、第１筒部６１１と小径部５１３との間隙に接着剤１１を保持することができる。   In the present embodiment, in the step of fixing the stator 5 to the cylindrical portion 61, the inner peripheral surface of the lower core back portion 512 is press-fit to the outer peripheral surface of the second cylindrical portion 612. Further, in the step of fixing the stator 5 to the cylindrical portion 61, after fixing the stator 5 to the cylindrical portion 61, the adhesive 11 is applied to either the outer peripheral surface of the first cylindrical portion 611 or the inner peripheral surface of the small diameter portion 513. Including the step of That is, the first cylindrical portion 611 and the small diameter portion 513 are fixed by the adhesive 11. Since the inner peripheral surface of the lower core back portion 512 is larger than the inner peripheral surface of the small diameter portion 513, the inner peripheral surface of the lower core back portion 512 is attached to the adhesive 11 applied to the outer peripheral surface of the first cylindrical portion 611. The stator 5 can be fixed to the housing 6 without contact. That is, the adhesive 11 can be held in the gap between the first cylindrical portion 611 and the small diameter portion 513.

上述のように、第２筒部６１２の外周面は、上端に中心軸Ｊに対して傾斜する傾斜面６１４を有し、傾斜面６１４と、小径部５１３の下面と、下コアバック部５１２の内周面と、の間には空間７が形成される。本実施形態におけるモータ１０の製造方法は、接着剤１１の少なくとも一部が前記空間７内に流入する工程を含む。これにより、接着剤１１が上側に流出し、軸受部材２内側に流出することを抑制できる。   As described above, the outer peripheral surface of the second cylindrical portion 612 has the inclined surface 614 inclined with respect to the central axis J at the upper end, and the inclined surface 614, the lower surface of the small diameter portion 513 and the lower core back portion 512. A space 7 is formed between the inner circumferential surface and the inner circumferential surface. The method of manufacturing the motor 10 in the present embodiment includes the step of at least a part of the adhesive 11 flowing into the space 7. As a result, the adhesive 11 can be prevented from flowing upward and flowing out to the inside of the bearing member 2.

以上、本発明の実施形態について説明した。なお、本発明の範囲は上述の実施形態に限定されない。本発明は、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。また、上述の実施形態で説明した事項は、矛盾を生じない範囲で適宜任意に組み合わせることができる。   The embodiments of the present invention have been described above. The scope of the present invention is not limited to the above-described embodiment. The present invention can be implemented with various modifications without departing from the scope of the invention. Further, the items described in the above embodiment can be arbitrarily combined arbitrarily as long as no contradiction arises.

本発明はモータに利用することができる。   The present invention can be utilized for a motor.

１・・・シャフト、２・・・軸受部材、２１・・・軸受収容部、３・・・ロータハブ、３１・・・マグネット保持部、３２・・・平板部、３３・・・連結部、３４・・・貫通孔、４・・・ロータマグネット、５・・・ステータ、５１・・・コアバック部、５１１・・・上コアバック部、５１２・・・下コアバック部、５１３・・・小径部、５１４・・・凹部、５２・・・ティース、５３・・・コイル、６・・・ハウジング、６１・・・筒部、６１１・・・第１筒部、６１２・・・第２筒部、６１３・・・第３筒部、６１４・・・傾斜面、７・・・空間、８・・・ピン、８１・・・凸部、９１・・・第１冶具、９２・・・第２冶具、１０・・・モータ、１１・・・接着剤、Ｊ・・・中心軸



DESCRIPTION OF SYMBOLS 1 ... Shaft, 2 ... Bearing member, 21 .. Bearing accommodation part, 3 ... Rotor hub, 31 ... Magnet holding part, 32 ... Flat part, 33 ... Connection part, 34 ... Through hole, 4 ... Rotor magnet, 5 ... Stator, 51 ... Core back part, 511 ... Upper core back part, 512 ... Lower core back part, 513 ... Small diameter Parts, 514: recessed parts, 52: teeth, 53: coils, 6: housing, 61: cylindrical part, 611: first cylindrical part, 612: second cylindrical part 613: third cylindrical portion 614: inclined surface 7: space 8: pin 81: convex portion 91: first jig 92: second Jig, 10: Motor, 11: Adhesive, J: Central axis



Claims (12)

中心軸を中心として回転し、中心軸に対して上下に延びるシャフトと、
前記シャフトを回転可能に支持する軸受部材と、
前記シャフトに連結され、下向きに開口するカップ形状のロータハブと、
前記ロータハブの径方向内側に保持されるロータマグネットと、
前記ロータマグネットの径方向内側に位置し、前記ロータマグネットと間隙を介して対向するステータと、
外側に前記ステータを保持する筒部を有する、ハウジングと、
を備え、
前記ステータは、
環状のコアバック部と、
前記コアバック部の外周から径方向外側に延びる複数のティースと、
前記ティースに導電線が巻回されてなるコイルと、
を有し、
前記コアバック部は、
前記コアバック部の軸方向上側端部を含み、径方向内側に前記軸受部材を収容する上コアバック部と、
前記コアバック部の軸方向下側端部を含み、前記筒部と径方向に対向する下コアバック部と、
前記上コアバック部の軸方向下側および前記下コアバック部の軸方向上側に配置され、前記上コアバック部および前記下コアバック部よりも、前記中心軸から内周面までの距離の小さい小径部と、
を有し、
前記小径部は、径方向外側に向かって凹む凹部を有し、
前記筒部と前記小径部との間隙、および前記凹部には接着剤が収容されている、モータ。 A shaft that rotates around the central axis and extends up and down with respect to the central axis,
A bearing member rotatably supporting the shaft;
A cup-shaped rotor hub connected to the shaft and opening downward;
A rotor magnet held radially inward of the rotor hub;
A stator located radially inward of the rotor magnet and facing the rotor magnet via a gap;
A housing having a cylindrical portion for holding the stator on the outside;
Equipped with
The stator is
And an annular core back portion,
A plurality of teeth extending radially outward from an outer periphery of the core back portion;
A coil formed by winding a conductive wire around the teeth;
Have
The core back portion is
An upper core back portion including an axially upper end portion of the core back portion and receiving the bearing member radially inward;
A lower core back portion including an axially lower end portion of the core back portion and radially facing the cylindrical portion;
It is disposed axially below the upper core back portion and axially above the lower core back portion, and has a smaller distance from the central axis to the inner circumferential surface than the upper core back portion and the lower core back portion. Small diameter portion,
Have
The small diameter portion has a recess that is recessed radially outward,
A motor, in which an adhesive is accommodated in a gap between the cylindrical portion and the small diameter portion, and in the concave portion. 前記筒部は、
前記小径部と径方向に対向する第１筒部と、
前記第１筒部の下方において、前記第１筒部よりも、前記中心軸から外周面までの距離が大きい第２筒部と、
を有し、
前記第２筒部は、前記下コアバック部と径方向に対向する、請求項１に記載のモータ。 The cylinder portion is
A first cylindrical portion radially opposed to the small diameter portion;
A second cylindrical portion having a larger distance from the central axis to the outer peripheral surface than the first cylindrical portion below the first cylindrical portion.
Have
The motor according to claim 1, wherein the second cylindrical portion radially faces the lower core back portion. 前記軸受部材の外輪の下面と前記小径部の上面とは、直接又は予圧ばねを介して軸方向に対向する、請求項１または請求項２に記載のモータ。   The motor according to claim 1, wherein the lower surface of the outer ring of the bearing member and the upper surface of the small diameter portion are axially opposed directly or via a preload spring. 前記第１筒部の外周面は、前記小径部の内周面と接着剤を介して対向し、
前記第２筒部の外周面と前記下コアバック部の内周面とは圧入にて固定されている、請求項２または請求項３に記載のモータ。 The outer circumferential surface of the first cylindrical portion faces the inner circumferential surface of the small diameter portion via an adhesive,
The motor according to claim 2, wherein an outer peripheral surface of the second cylindrical portion and an inner peripheral surface of the lower core back portion are fixed by press-fitting. 前記第２筒部の外周面は、上端に前記中心軸に対して傾斜する傾斜面を有し、
前記傾斜面と、前記小径部の下面と、前記上コアバック部の内周面と、の間には空間が形成され、
前記空間には前記接着剤の少なくとも一部が配置される、請求項４に記載のモータ。 The outer peripheral surface of the second cylindrical portion has an inclined surface inclined at an upper end with respect to the central axis,
A space is formed between the inclined surface, the lower surface of the small diameter portion, and the inner peripheral surface of the upper core back portion,
The motor according to claim 4, wherein at least a part of the adhesive is disposed in the space. 前記筒部は、前記第２筒部よりも下方において、前記第２筒部よりも、前記中心軸から外周面までの距離が大きい第３筒部を有し、
前記第３筒部には、前記軸受部材が配置される、請求項１から請求項５のいずれか１項に記載のモータ。 The cylindrical portion has a third cylindrical portion having a larger distance from the central axis to the outer peripheral surface than the second cylindrical portion below the second cylindrical portion.
The motor according to any one of claims 1 to 5, wherein the bearing member is disposed in the third cylindrical portion. 前記ロータハブの外径が、１１ｍｍ以下である、請求項１か請求項６のいずれか１項に記載のモータ。   The motor according to any one of claims 1 to 6, wherein an outer diameter of the rotor hub is 11 mm or less. 中心軸を中心とする環状のコアバック部と、前記コアバック部の外周から径方向外側に延びる複数のティースと、を有するステータと、
前記中心軸に対して上下に延びる筒部を有する、ハウジングと、
を備え、
前記コアバック部は、前記コアバック部の軸方向上側端部を含む上コアバック部と、前記コアバック部の軸方向下側端部を含む下コアバック部と、前記上コアバック部の軸方向下側および前記下コアバック部の軸方向上側に配置され、前記上コアバック部および前記下コアバック部よりも、前記中心軸から内周面までの距離の小さい小径部と、を有し、前記小径部が、径方向外側に向かって凹む凹部を有する、モータの製造方法であって、
ａ）巻線機のピンに設けられた凸部を、前記凹部に固定し、前記ティースに導電線を巻回してコイルを形成する工程と、
ｂ）前記筒部の下方を第１冶具の上面に配置する工程と、
ｃ）前記筒部の上方から、前記小径部の上面に第２冶具の下面を接触させて、前記ステータを前記筒部の径方向外側に固定する工程と、
を含む、モータの製造方法。 A stator having an annular core back portion centered on a central axis, and a plurality of teeth extending radially outward from the outer periphery of the core back portion;
A housing having a cylindrical portion extending vertically with respect to the central axis;
Equipped with
The core back portion includes an upper core back portion including an axial upper end portion of the core back portion, a lower core back portion including an axial lower end portion of the core back portion, and an axis of the upper core back portion. And a small diameter portion, which is disposed on the lower side in the axial direction and on the axial direction upper side of the lower core back portion, and has a smaller distance from the central axis to the inner circumferential surface than the upper core back portion and the lower core back portion. A method of manufacturing a motor, wherein the small diameter portion has a recess which is recessed radially outward.
a) fixing a convex portion provided on a pin of a winding machine to the concave portion, and winding a conductive wire around the teeth to form a coil;
b) disposing the lower side of the cylindrical portion on the upper surface of the first jig;
c) fixing the stator to the radially outer side of the cylindrical portion by bringing the lower surface of the second jig into contact with the upper surface of the small diameter portion from above the cylindrical portion;
A method of manufacturing a motor, including: 請求項８に記載の製造方法であって、
前記小径部と径方向に対向する第１筒部と、前記第１筒部の下方において、前記第１筒部よりも、前記中心軸から外周面までの距離が大きい第２筒部と、を有する前記筒部を準備する工程を含む、モータの製造方法。 The manufacturing method according to claim 8, wherein
A first cylindrical portion radially opposed to the small diameter portion, and a second cylindrical portion having a greater distance from the central axis to the outer peripheral surface than the first cylindrical portion below the first cylindrical portion; The manufacturing method of a motor including the process of preparing the said cylinder part which has. 請求項９に記載の製造方法であって、
前記工程ｃ）の後に、
前記小径部の上方から、前記上コアバック部に前記軸受部材を固定する、モータの製造方法。 The manufacturing method according to claim 9,
After the step c)
The motor manufacturing method, wherein the bearing member is fixed to the upper core back portion from above the small diameter portion. 請求項９または請求項１０に記載の製造方法であって、
前記工程ｃ）において、前記下コアバック部の内周面は、前記第２筒部の外周面に圧入され、
前記工程ｃ）は、
前記第１筒部の外周面または前記小径部の内周面のいずれかに接着剤を塗布する工程を含む、モータの製造方法。 The manufacturing method according to claim 9 or 10, wherein
In the step c), the inner peripheral surface of the lower core back portion is press-fit into the outer peripheral surface of the second cylindrical portion,
Said step c) is
A method of manufacturing a motor, comprising the step of applying an adhesive to either the outer peripheral surface of the first cylindrical portion or the inner peripheral surface of the small diameter portion. 請求項１１に記載の製造方法であって、
前記第２筒部の外周面は、上端に前記中心軸に対して傾斜する傾斜面を有し、
前記傾斜面と、前記小径部の下面と、前記下コアバック部の内周面と、の間には空間が形成され、
前記工程ｃ）は、
前記接着剤の少なくとも一部が前記空間内に流入する工程を含む、モータの製造方法。


The method according to claim 11, wherein
The outer peripheral surface of the second cylindrical portion has an inclined surface inclined at an upper end with respect to the central axis,
A space is formed between the inclined surface, the lower surface of the small diameter portion, and the inner peripheral surface of the lower core back portion,
Said step c) is
A method of manufacturing a motor, comprising the step of at least a part of the adhesive flowing into the space.


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