JP6972890B2 - Motors and motor manufacturing methods - Google Patents

Motors and motor manufacturing methods Download PDF

Info

Publication number
JP6972890B2
JP6972890B2 JP2017200385A JP2017200385A JP6972890B2 JP 6972890 B2 JP6972890 B2 JP 6972890B2 JP 2017200385 A JP2017200385 A JP 2017200385A JP 2017200385 A JP2017200385 A JP 2017200385A JP 6972890 B2 JP6972890 B2 JP 6972890B2
Authority
JP
Japan
Prior art keywords
core back
peripheral surface
back portion
small diameter
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017200385A
Other languages
Japanese (ja)
Other versions
JP2019075890A (en
Inventor
宣 坂内
祐介 一岡
義夫 黒川
貴洋 杉之原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec America Corp
Original Assignee
Nidec America Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec America Corp filed Critical Nidec America Corp
Priority to JP2017200385A priority Critical patent/JP6972890B2/en
Priority to CN201811054612.3A priority patent/CN109672285B/en
Priority to CN201821480873.7U priority patent/CN208986700U/en
Publication of JP2019075890A publication Critical patent/JP2019075890A/en
Application granted granted Critical
Publication of JP6972890B2 publication Critical patent/JP6972890B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

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 for 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 the conventional motor, a so-called outer rotor type motor in which a magnet is arranged on the radial outer side of the stator is known. In the outer rotor type motor, a member for holding the stator is arranged inside the stator core in the radial direction, and a jig for assembly is arranged 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 devices on which outer rotor type motors are mounted, it is required to reduce the diameter of the motor itself. Factors that define the outer diameter of the motor include, 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.

特開１９９９−０８９１９６号公報Japanese Unexamined Patent Publication No. 1999-08919

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 Japanese Patent Application Laid-Open No. 1999-08919, if the radial length of the core back portion is shortened to reduce the size of the motor, the magnetic characteristics are deteriorated due to the arrangement of the cutout portion. On the other hand, if the depth of the notch is made shallow, 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 having a smaller diameter that structurally fastens a housing and a stator without deteriorating magnetic properties.

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おり、筒部は、小径部と径方向に対向する第１筒部と、第１筒部の下方において、第１筒部よりも、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、第２筒部は、下コアバック部と径方向に対向し、第１筒部の外周面は、小径部の内周面と接着剤を介して対向し、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、第２筒部と下コアバック部との圧入領域は、第１筒部と小径部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。
The motor of one exemplary embodiment of the present invention has a shaft that rotates about a central axis and extends vertically with respect to the central axis, a bearing member that rotatably supports the shaft, and a shaft that is connected to the shaft and faces downward. An open cup-shaped rotor hub, a rotor magnet held radially inside the rotor hub, a stator located inside the rotor magnet radially inside and facing the rotor magnet through a gap, and a cylinder holding the stator outside. A housing comprising a portion, the stator comprises an annular core back portion, a plurality of teeth extending radially outward from the outer periphery of the core back portion, and a coil formed by winding a conductive wire around the teeth. The core back portion includes an axial upper end portion of the core back portion, an upper core back portion accommodating a bearing member radially inside, and an axial lower end portion of the core back portion, and includes a tubular portion. The lower core back part facing the radial direction and the lower side in the axial direction of the upper core back part and the upper side in the axial direction of the lower core back part are arranged from the central axis to the inner side of the upper core back part and the lower core back part. It has a small diameter portion with a small distance to the peripheral surface, and the small diameter portion has a recess that dents outward in the radial direction, and the gap between the tubular portion and the small diameter portion and the recess contain an adhesive. The cylinder portion includes a first cylinder portion that faces the small diameter portion in the radial direction, and a second cylinder portion that has a larger distance from the central axis to the outer peripheral surface than the first cylinder portion below the first cylinder portion. The second cylinder portion is radially opposed to the lower core back portion, and the outer peripheral surface of the first cylinder portion is opposed to the inner peripheral surface of the small diameter portion via an adhesive, and the second cylinder portion is The outer peripheral surface and the inner peripheral surface of the lower core back portion are fixed by press fitting, and the press fitting region between the second cylinder portion and the lower core back portion is more axial than the bonding region between the first cylinder portion and the small diameter portion. It is located on the lower side in the direction and on the outer side in the radial direction .

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、を含み、小径部と径方向に対向する第１筒部と、第１筒部の下方において、第１筒部よりも、中心軸から外周面までの距離が大きい第２筒部と、を有する筒部を準備する工程を含み、工程ｃ）において、下コアバック部の内周面は、第２筒部の外周面に圧入され、工程ｃ）は、第１筒部の外周面または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み、第２筒部と下コアバック部との圧入領域は、第１筒部と小径部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。
An exemplary method of manufacturing a motor of the present invention includes 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. It comprises a housing having a tubular portion extending up and down with respect to the central axis, and the core back portion includes an upper core back portion including an axial upper end portion of the core back portion and an axial lower end portion of the core back portion. The lower core back part including the part and the lower side in the axial direction of the upper core back part and the upper side in the axial direction of the lower core back part are arranged from the central axis to the inner peripheral surface of the upper core back part and the lower core back part. A method of manufacturing a motor, wherein the small diameter portion has a small diameter portion having a small diameter portion, and the small diameter portion has a concave portion recessed outward in the radial direction. The process of fixing to the recess and winding the conductive wire around the tooth to form a coil, b) the process of arranging the lower part of the cylinder part on the upper surface of the first jig, and c) from the upper part of the cylinder part to the upper surface of the small diameter part. Including the step of bringing the lower surface of the second jig into contact with each other to fix the stator to the radially outer side of the cylinder portion, including the first cylinder portion radially facing the small diameter portion and the lower portion of the first cylinder portion. In step c), the inner peripheral surface of the lower core back portion is the first cylinder portion, which includes a step of preparing a cylinder portion having a second cylinder portion having a larger distance from the central axis to the outer peripheral surface than the first cylinder portion. The step c) includes a step of applying an adhesive to either the outer peripheral surface of the first cylinder portion or the inner peripheral surface of the small diameter portion, and the second cylinder portion and the lower core back are press-fitted into the outer peripheral surface of the second cylinder portion. The press-fitting region with the portion is located on the lower side in the axial direction and the outer side in the radial direction with respect to the bonding region between the first cylinder portion and the small diameter portion.

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 according to the present invention, the housing and the stator can be structurally fastened and the diameter of the motor can be reduced without deteriorating 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 the core back portion and teeth of the motor according to the 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 diagram for explaining a step of winding a conductive wire around a tooth of a motor according to an embodiment of the present invention to form a coil. 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 according to 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 according to 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 the present specification, the direction along the central axis J shown in FIG. 1 is referred to as an axial direction, the direction orthogonal to the central axis J is referred to as a radial direction, and the direction along an arc centered on the central axis J is referred to as a circumferential direction. Further, in the present specification, the shape and positional relationship of each part will be described with the axial direction as the vertical direction and the rotor hub 3 side facing up with respect to the motor 10. However, this definition of the vertical direction does not intend to limit the orientation of the motor 10 of the present invention when it is used.

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 an overall configuration of a motor 10 according to an exemplary embodiment of the present invention. The motor 10 is mounted on, for example, a small unmanned aerial vehicle (not shown) to rotate its wings. Not limited to this example, the motor 10 may be mounted on, for example, an OA device, a medical device, a tool, a large-scale industrial facility, or the like to generate various driving forces. 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 the 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 this 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 has a cup shape that is connected to the shaft 1 and opens downward. The rotor hub 3 has 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. It has a connecting portion 33 and. The rotor hub 3 is fixed above the fixed portion of the bearing member 2 of the shaft 1 in the connecting portion 33. That is, the cylindrical inner peripheral surface of the connecting 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 inside the rotor hub 3 in the radial direction. In the present embodiment, the rotor magnet 4 is fixed to the inner peripheral surface of the magnet holding portion 31. The inner peripheral surface of the rotor magnet 4 and the stator 5 face each other with a gap in the radial direction. The rotor hub 3 and the rotor magnet 4 are fixed by adhesion or press fitting. The flat plate portion 32 has a plurality of through holes 34 penetrating in the axial direction. The hot air generated from the stator 5 due to the rotation of the motor 10 is discharged to the outside of the motor 10 through the through hole 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 inside 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 circumference of the core back portion 51, and a coil 53 in which a conductive wire is wound around the teeth 52. In the present embodiment, the core back portion 51 and the teeth 52 are made by laminating a plurality of thin steel plates which are ferromagnets. In the teeth 52, insulating coating is applied to the portion around which the conductive wire is wound and its periphery. The core back portion 51 and the teeth 52 may be a dust core formed by compression molding using a metal powder in 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 axially 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. It has a small diameter portion 513 arranged on the lower side in the axial direction and on the upper side in the axial direction of the lower core back portion 512. The upper core back portion 511 accommodates the bearing member 2 in the radial direction. In other words, the bearing member 2 is held directly on the inner peripheral surface of the upper core back portion 511 or via 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 face each other in the axial direction directly or via a preload spring. The lower core back portion 512 faces the tubular portion 61, which will be described later, in the radial direction.

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 peripheral 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 from 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 tubular portion 61 that holds the stator 5 on the outer side in the radial direction. Further, the housing 6 has a bearing accommodating portion 21 accommodating the bearing member 2 on the lower side in the axial direction than the stator 5. In the present embodiment, the upper bearing member 2 is housed in the upper core back portion 511 of the stator 5, and the lower bearing member 2 is housed in the bearing housing portion 21 of the housing 6. The tubular portion 61 has a first tubular portion 611, a second tubular portion 612, and a third tubular portion 613. The first cylinder portion 611 faces the small diameter portion 513 in the radial direction. The second cylinder portion 612 has a larger distance from the central axis J to the outer peripheral surface below the first cylinder portion 611 than the first cylinder portion 611, and faces 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 cylinder portion 613 has a larger distance from the central axis J to the outer peripheral surface than the second cylinder portion 612 below the second cylinder portion 612. In the present embodiment, the bearing accommodating portion 21 is provided in the third cylinder portion 613 and opens downward. That is, the bearing member 2 is arranged in the third cylinder portion 613. The bearing member 2 is housed in the bearing accommodating portion 21 from below. That is, the bearing member 2 is housed in the third cylinder portion 613 from below. The outer peripheral surface of the bearing member 2 is fixed to the inner peripheral surface of the third cylinder 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 according to the embodiment of the present invention. As shown in FIG. 2, the small diameter portion 513 has a recess 514 that is recessed outward in the radial direction. The adhesive 11 is housed in the gap between the tubular portion 61 and the small diameter portion 513 and the recess 514. As a result, the stator 5 and the housing 6 can be firmly fixed. Further, 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 diagram for explaining a step of winding a conductive wire around a tooth 52 of a stator 5 in an embodiment of the present invention to form a coil 53. When the rotor hub 3 is miniaturized, the thickness of the core back portion 51 in the radial direction is also reduced. For example, when forming the coil 53, the convex portion 81 provided on the pin 8 of the winding machine is arranged in the concave portion 514 for positioning. At this time, if the recess 514 is provided in the upper core back portion 511 or the lower core back portion 512, the depth of the recess 514 may become shallow or the magnetic characteristics may deteriorate. 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 becomes shallow in such a small motor 10, the holding force between the concave portion 514 and the convex portion 81 becomes small, and the convex portion 81 may come off from the concave portion 514. In the present embodiment, 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.

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 cylinder portion 612 faces the lower core back portion 512 in the radial direction. Thereby, different methods of fixing the stator 5 and the housing 6 can be used between the small diameter portion 513 and the first cylinder portion 611 and between the lower core back portion 512 and the second cylinder portion 612. .. In the present embodiment, for example, the outer peripheral surface of the first cylinder portion 611 and the inner peripheral surface of the small diameter portion 513 have a gap, and the gap is further opposed to each other via the adhesive 11. The outer peripheral surface of the second tubular portion 612 and the inner peripheral surface of the lower core back portion 512 are fixed by press fitting. As a result, 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 amount of the deviation is set to the outer peripheral surface of the first cylinder portion 611 and the small diameter portion. By adjusting the gap between the inner peripheral surface of the 513 and the inner peripheral surface, it is possible to prevent the stress on the core back portion 51 from being biased due to the contact between the outer peripheral surface of the first cylinder 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 according to the embodiment of the present invention in an enlarged manner. The outer peripheral surface of the second tubular portion 612 has an inclined surface 614 inclined with respect to the central axis J at the upper end. As a result, 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. The adhesive 11 interposed between the outer peripheral surface of the first cylinder portion 611 and the inner peripheral surface of the small diameter portion 513 allows the adhesive 11 to enter the space 7 when the first cylinder portion 611 is fixed to the small diameter portion 513. Inflow. That is, at least a part of the adhesive 11 is arranged in the space 7. As a result, it is possible to prevent the adhesive 11 from flowing out to the upper side and 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-fitting region between the second cylinder portion 612 and the lower core back portion 512 is located axially lower and radially outside than the bonding region between the first cylinder portion 611 and the small diameter portion 513. Since the press-fitting region is located axially lower and radially outer than the bonding region between the first cylinder portion 611 and the small diameter portion 513, the adhesive 11 is applied to the press-fitting region when the stator 5 and the housing 6 are assembled. It can be dammed and the adhesive 11 can be held in the adhesive region. That is, it is possible to prevent the adhesive 11 from flowing out below the second cylinder 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 both press fitting and adhesion. Further, in adhesive fixing, the adhesive 11 is provided between the stator 5 and the housing 6 by arranging the press-fitting region axially lower and radially outer than the adhesive region in order to suppress the outflow of the adhesive 11 during assembly. It is held in the gap and the adhesive strength can be ensured.

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 this 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 includes an annular core back portion 51 centered on the central axis J, and a plurality of teeth 52 extending radially outward from the outer circumference of the core back portion 51. Have. Further, the motor 10 includes a housing 6 having a tubular portion 61 extending up and down 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 has an upper core back portion 511 including an axially upper end portion of the core back portion 51 and an axial lower side of the core back portion 51. The lower core back portion 512 including the end portion, the lower core back portion 511 in the axial direction, and the upper core back portion 512 in the axial direction are arranged, and are centered more than the upper core back portion 511 and the lower core back portion 512. It has a small diameter portion 513 with a small distance from the shaft J to the inner peripheral surface, and the small diameter portion 513 has a recess 514 that is recessed outward in the radial direction.

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 for manufacturing the motor 10 in the present embodiment includes a step of forming the coil 53, a step of arranging the tubular portion 61 of the housing 6 on the first jig 91, and a step of fixing the stator 5 to the tubular 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 diagram for explaining a step of winding a conductive wire around a tooth 52 of a stator 5 in an embodiment of the present invention to form a coil 53. A convex portion 81 is arranged 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 is possible to suppress the movement of the core back portion 51 and the teeth 52 when the core back portion 51 and the teeth 52 are attached to the 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 part of the tubular portion 61 of the housing 6 is arranged on the upper surface of the first jig 91. The stator 5 is fixed to the outside of the tubular portion 61 in the radial direction from above the tubular portion 61 arranged 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. As a result, a force is applied to the stator 5, and the stator 5 is fixed to the radial outer side of the tubular 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, insulating coating is applied to the portion around which the conductive wire is wound and its periphery. 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 coating around the coil 53 may come into contact with the second jig 92. In the present embodiment, the lower surface of the second jig 92 is brought into contact with the upper surface of the small diameter portion 513 to apply a force. Since the second jig 92 does not come into contact with the insulating coating around the coil 53, it is possible to prevent the insulating coating from peeling off or becoming thin.

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 in the present embodiment, the first cylinder portion 611 facing the small diameter portion 513 in the radial direction and the outer circumference from the central axis J below the first cylinder portion 611 are more than the first cylinder portion 611. A step of preparing a second cylinder portion 612 having a large distance to a surface and a cylinder portion 61 having the second cylinder portion 612 is included. Thereby, different methods of fixing the stator 5 and the housing 6 can be used between the small diameter portion 513 and the first cylinder portion 611 and between the lower core back portion 512 and the second cylinder 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 for manufacturing the motor 10 in the present embodiment includes a 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 tubular 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 cylinder portion 61, the inner peripheral surface of the lower core back portion 512 is press-fitted into the outer peripheral surface of the second cylinder portion 612. Further, in the step of fixing the stator 5 to the cylinder portion 61, after fixing the stator 5 to the cylinder portion 61, the adhesive 11 is applied to either the outer peripheral surface of the first cylinder portion 611 or the inner peripheral surface of the small diameter portion 513. Including the process of That is, the first cylinder 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 becomes the adhesive 11 applied to the outer peripheral surface of the first cylinder 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 cylinder 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 tubular portion 612 has an 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 peripheral surface and the inner peripheral surface. The method for manufacturing the motor 10 in the present embodiment includes a step in which at least a part of the adhesive 11 flows into the space 7. As a result, it is possible to prevent the adhesive 11 from flowing out to the upper side and 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 embodiment of the present invention has been described above. The scope of the present invention is not limited to the above-described embodiment. The present invention can be carried out with various modifications without departing from the gist of the invention. In addition, the items described in the above-described embodiments can be arbitrarily combined as long as they do not cause a contradiction.

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

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



1 ... shaft, 2 ... bearing member, 21 ... bearing accommodating part, 3 ... rotor hub, 31 ... magnet holding part, 32 ... flat plate part, 33 ... connecting 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 Jig 514 ... concave, 52 ... teeth, 53 ... coil, 6 ... housing, 61 ... cylinder, 611 ... first cylinder, 612 ... second cylinder , 613 ... 3rd cylinder, 614 ... Inclined surface, 7 ... Space, 8 ... Pin, 81 ... Convex, 91 ... 1st jig, 92 ... 2nd Jig, 10 ... motor, 11 ... adhesive, J ... central axis

Claims (8)

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おり、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し、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、前記第２筒部と前記下コアバック部との圧入領域は、前記第１筒部と前記小径部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、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 that rotatably supports the shaft and
A cup-shaped rotor hub that is connected to the shaft and opens downward,
The rotor magnet held inside the rotor hub in the radial direction and
A stator located inside the rotor magnet in the radial direction and facing the rotor magnet via a gap,
A housing having a cylinder portion for holding the stator on the outside,
Equipped with
The stator is
The annular core back and
A plurality of teeth extending radially outward from the outer circumference of the core back portion,
A coil in which a conductive wire is wound around the tooth,
Have,
The core back portion is
An upper core back portion including the upper end portion in the axial direction of the core back portion and accommodating the bearing member in the radial direction, and an upper core back portion.
A lower core back portion that includes the axial lower end portion of the core back portion and is radially opposed to the tubular portion.
It is arranged on the lower side in the axial direction of the upper core back portion and the upper side in the axial direction of the lower core back portion, and the distance from the central axis to the inner peripheral surface is smaller than that of the upper core back portion and the lower core back portion. Small diameter part and
Have,
The small diameter portion has a recess that is recessed outward in the radial direction.
An adhesive is housed in the gap between the tubular portion and the small diameter portion and the recess, and the tubular portion has a first tubular portion that faces the small diameter portion in the radial direction and the first tubular portion. Below, the second cylinder portion has a second cylinder portion having a larger distance from the central axis to the outer peripheral surface than the first cylinder portion, and the second cylinder portion is radially opposed to the lower core back portion. The outer peripheral surface of the first cylinder portion faces the inner peripheral surface of the small diameter portion via an adhesive, and the outer peripheral surface of the second cylinder portion and the inner peripheral surface of the lower core back portion are press-fitted. A motor that is fixed and the press-fitting region between the second cylinder portion and the lower core back portion is located axially lower and radially outer than the adhesion region between the first cylinder portion and the small diameter 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 face each other in the axial direction directly or via a preload spring. 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１または請求項２に記載のモータ。 The outer peripheral surface of the second cylinder portion has an inclined surface inclined with respect to the central axis at the upper end.
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 1 or 2 , wherein at least a part of the adhesive is arranged 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３のいずれか１項に記載のモータ。 The tubular portion has a third tubular portion below the second tubular portion and having a larger distance from the central axis to the outer peripheral surface than the second tubular portion.
The motor according to any one of claims 1 to 3 , wherein the bearing member is arranged in the third cylinder portion. 前記ロータハブの外径が、１１ｍｍ以下である、請求項１から請求項４のいずれか１項に記載のモータ。 The motor according to any one of claims 1 to 4 , wherein the rotor hub has an outer diameter of 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、
を含み、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み、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み、前記第２筒部と前記下コアバック部との圧入領域は、前記第１筒部と前記小径部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、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 and a housing having a cylinder extending up and down with respect to the central axis.
Equipped with
The core back portion includes an upper core back portion including an axially 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 a shaft of the upper core back portion. It has a small diameter portion that is arranged on the lower side in the direction and on the upper side in the axial direction of the lower core back portion, and has a smaller distance from the central axis to the inner peripheral 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 concave portion recessed outward in the radial direction.
a) A step of fixing a convex portion provided on a pin of a winding machine to the concave portion and winding a conductive wire around the tooth to form a coil.
b) The process of arranging the lower part of the cylinder on the upper surface of the first jig, and
c) A step of bringing the lower surface of the second jig into contact with the upper surface of the small diameter portion from above the tubular portion to fix the stator to the radial outside of the tubular portion.
Only including, a first cylindrical portion facing the smaller-diameter portion in the radial direction, in the lower of the first tubular portion than said first cylindrical portion, a second cylindrical distance to the outer peripheral surface is greater from the central axis In the step c), the inner peripheral surface of the lower core back portion is press-fitted into the outer peripheral surface of the second tubular portion, and the step c) is performed.
The step of applying an adhesive to either the outer peripheral surface of the first cylinder portion or the inner peripheral surface of the small diameter portion is included, and the press-fitting region between the second cylinder portion and the lower core back portion is the first cylinder portion. A method for manufacturing a motor, which is located axially lower and radially outer than the bonding region between the portion and the small diameter portion. 請求項６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 6.
After the step c),
A method for manufacturing a motor, in which the bearing member is fixed to the upper core back portion from above the small diameter portion. 請求項６または請求項７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 manufacturing method according to claim 6 or 7.
The outer peripheral surface of the second cylinder portion has an inclined surface inclined with respect to the central axis at the upper end.
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.
The step c) is
A method of manufacturing a motor, comprising a step of flowing at least a part of the adhesive into the space.
JP2017200385A 2017-10-16 2017-10-16 Motors and motor manufacturing methods Active JP6972890B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2017200385A JP6972890B2 (en) 2017-10-16 2017-10-16 Motors and motor manufacturing methods
CN201811054612.3A CN109672285B (en) 2017-10-16 2018-09-11 Motor and method for manufacturing motor
CN201821480873.7U CN208986700U (en) 2017-10-16 2018-09-11 Motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017200385A JP6972890B2 (en) 2017-10-16 2017-10-16 Motors and motor manufacturing methods

Publications (2)

Publication Number Publication Date
JP2019075890A JP2019075890A (en) 2019-05-16
JP6972890B2 true JP6972890B2 (en) 2021-11-24

Family

ID=66142356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017200385A Active JP6972890B2 (en) 2017-10-16 2017-10-16 Motors and motor manufacturing methods

Country Status (2)

Country Link
JP (1) JP6972890B2 (en)
CN (2) CN208986700U (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6972890B2 (en) * 2017-10-16 2021-11-24 日本電産株式会社 Motors and motor manufacturing methods

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08186969A (en) * 1994-12-28 1996-07-16 Nippon Densan Corp Brushless motor
JP4309642B2 (en) * 2002-11-27 2009-08-05 日本電産株式会社 Hydrodynamic bearing device and manufacturing method thereof
JP5372629B2 (en) * 2009-07-09 2013-12-18 日本電産株式会社 Brushless motor
CN205792124U (en) * 2015-05-29 2016-12-07 日本电产株式会社 Motor
JP6693148B2 (en) * 2015-05-29 2020-05-13 日本電産株式会社 motor
CN205503983U (en) * 2016-02-05 2016-08-24 库柏电气(常州)有限公司 Mechanical seal
JP6972890B2 (en) * 2017-10-16 2021-11-24 日本電産株式会社 Motors and motor manufacturing methods

Also Published As

Publication number Publication date
CN109672285B (en) 2021-04-13
JP2019075890A (en) 2019-05-16
CN109672285A (en) 2019-04-23
CN208986700U (en) 2019-06-14

Similar Documents

Publication Publication Date Title
US8729760B2 (en) Rotor of electric motor having structure for attaching magnet securely to outer circumferential surface of rotor core and manufacturing method thereof
JP5553599B2 (en) Electric motor
JP6274475B2 (en) Rotor, rotating electric machine, and method of manufacturing rotor
CN108933495B (en) Motor with a stator having a stator core
US20130280090A1 (en) Fan device
JP5274091B2 (en) Stator manufacturing method for rotating electrical machine
US9825501B2 (en) Rotor with end ring and electric motor
CN208445399U (en) Motor
KR102297684B1 (en) Rotor Assembly, the manufacturing method of Rotor Assembly and Motor having Rotor Assembly
CN112449738A (en) Wire guide device for rotor of wound rotor synchronous motor
JP6972890B2 (en) Motors and motor manufacturing methods
JP7404800B2 (en) Rotor manufacturing method
US20070210670A1 (en) Motor
US8375562B2 (en) Manufacturing method of rotating electric machine and rotating electric machine
CN110798008A (en) Motor with a stator having a stator core
CN109322907A (en) The assemble method of bearing assembly, motor and bearing assembly
CN111384800B (en) Rotor and motor
US20040114842A1 (en) Motor with compound bearing for OA device
JP2008125333A (en) Stator
JP6816546B2 (en) Motors and motor manufacturing methods
US7795775B2 (en) Motor stator
CN112042079B (en) Rotary electric machine
JP2019221035A (en) Rotary electric machine and rotary electric machine manufacturing method
US20230268783A1 (en) Stator core of rotating electrical machine and rotating electrical machine
JP6753792B2 (en) motor

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20171101

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200928

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210714

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210727

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210924

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20211005

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20211018

R151 Written notification of patent or utility model registration

Ref document number: 6972890

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151