JP4714012B2 - Electric motor - Google Patents

Description

  The present invention relates to an electric motor, and more particularly, to an electric motor configured to be thin by providing a rotor with, for example, a printed coil.

The following are known as this type of electric motor (see, for example, Patent Document 1). For example, in the electric fan motor described in Patent Document 1, a rotor is rotatably accommodated in a housing, and an output shaft that projects out of the housing is integrally fixed to the rotor. Further, a printed coil is coaxially provided on the rotor, and a brush is pressed against the printed coil, and power is supplied from the brush. The brush is accommodated in a brush holder, and this brush holder is inserted and fixed in a through hole formed in the housing.
JP 2000-156506 A

  By the way, in the thin electric motor shown in Patent Document 1, there is an attempt to make a so-called direct connector structure in which a brush and an external power source are electrically connected by a connector. Here, in order to realize the direct connection connector structure, for example, it is conceivable that the housing and the connector are configured separately and the connector is riveted on the housing or outsert molded. However, this makes the structure for fixing the connector to the housing complicated. For this reason, in a thin electric motor as shown in Patent Document 1, it is common that the brush and the external power source are electrically connected via a lead wire. It was not planned.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric motor capable of reducing the cost by realizing a direct connector structure with a simple configuration.

In order to solve the above-mentioned problem, an electric motor according to an embodiment of the present invention includes a disk-type rotor that is attached to an output shaft and rotates integrally with the output shaft, a housing that houses the disk-type rotor, A stator magnet facing the disk-shaped rotor in the direction of the rotation axis, and a surface opposite to the surface facing the disk-shaped rotor is mounted on the housing; a brush pressed against the disk-shaped rotor; the housing; A brush holder portion that is held against the housing by being sandwiched between a stator magnet and inserted into a through-hole formed in the plate thickness direction of the housing and holds the brush; and The brush holder part is integrally provided on the opposite side of the stator magnet from the housing and electrically connects the brush and an external power source. A connector portion that, the connector-integrated brush holder configured with a, and the magnetic flux securing plate to secure the magnetic flux from the stator magnet in the through hole is formed partially with closing the through hole, It is provided with.

2. The electric motor according to claim 1, wherein the connector-integrated brush holder includes a brush holder portion for holding the brush and a connector portion for electrically connecting the brush and an external power source. It is. Therefore, unlike the prior art, for example, it is not necessary to configure the connector separately from the housing and to rivet or outsert this connector on the housing. In addition, the structure for assembling the connector-integrated brush holder to the housing is a simple structure in which the flange formed on the brush holder portion of the connector-integrated brush holder is sandwiched between the housing and the stator magnet and held in the housing. It is a configuration. Thus, in the electric motor according to the first aspect, a so-called direct connector structure in which the brush and the external power source are electrically connected by the connector can be realized with a simple configuration. Thereby, cost reduction of an electric motor can be achieved.
Further, as described above, even when the through-hole into which the brush holder portion is inserted is formed through the housing, for example, the through-hole of the housing is formed by including a magnetic flux securing plate that closes the through-hole. A magnetic circuit can be formed in the portion, and a magnetic flux can be secured.

  At this time, if the brush holder portion and the connector portion are formed by integral molding with resin as in the invention described in claim 2, the connector-integrated brush holder can be easily manufactured, and the electric motor The cost can be further reduced.

Further, as in the third aspect of the present invention, the fixing structure of the magnetic flux securing plate has a simple structure in which the magnetic flux securing plate is held between the flange and the stator magnet. The increase in the cost of the electric motor due to the addition of the securing plate can also be suppressed.

According to a fourth aspect of the present invention, the connecting portion is connected to the brush via a pigtail, the connector-integrated brush holder is provided with a space portion that opens to the stator magnet side, and the connector portion is a space. For example, when assembling an electric motor, insert a hand or a tool from the opening on the stator magnet side of the space portion and connect the brush side connection portion. Connection work with the connected part on the connector side can be performed. As a result, it is possible to reduce the cost of the electric motor by improving the connection workability between the brush-side connecting portion and the connector-side connected portion.

Further, as in the invention described in claim 5 , when the connector portion is provided with a connection terminal connected to an external power source, and the connection terminal extends along the motor radial direction, the connection terminal As a result, the protrusion amount of the entire connector portion in the rotation axis direction can be suppressed. This makes it possible to reduce the thickness of the electric motor.

Further, as in the invention described in claim 6 , a seal member is inserted between the peripheral portion of the through hole and the flange, and the seal member is pressed against the housing side by the stator magnet. When pressed by the peripheral edge of the through hole and the flange, the sealing member ensures waterproofness around the brush holder, that is, foreign matter such as water droplets enters the inside of the housing from the outside through the through hole. Can be prevented.

Moreover, if the electric motor of the present invention is used as, for example, a fan for cooling the radiator as in the invention described in claim 7 , the cost of the entire radiator cooling system can be reduced by reducing the cost of the electric motor. it can.

  First, the configuration of an electric fan motor 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  The electric fan motor 10 of this embodiment is used suitably for the cooling system of the radiator mounted in a vehicle, for example. As shown in FIG. 1, the electric fan motor 10 includes a housing 12, and the housing 12 includes a housing main body 14 and an end housing 16. As shown in FIG. 1, the housing main body 14 and the end housing 16 are assembled by, for example, press-fitting the outer peripheral surface of the end housing 16 into the inner peripheral surface of the housing main body 14.

  A bearing housing portion 18 is formed in the center of the portion of the housing body 14 opposite to the end housing 16, and a bearing member 20 is housed in the bearing housing portion 18. On the other hand, a bearing accommodating portion 22 is also formed in the center of the end housing 16, and a bearing member 24 is accommodated in the bearing accommodating portion 22. An output shaft 26 is fixed to the bearing members 20 and 24, so that the output shaft 26 is rotatable. One end of the output shaft 26 projects outwardly from an opening 28 formed in the housing body 14, and a projection 30, which projects outwardly from the housing body 14 of the output shaft 26, has a radiator cooling fan (not shown). Is fixed.

  As shown in FIGS. 1 and 3, the end housing 16 is formed with a flat portion 36 along the radial direction on which a stator magnet 62 described later is mounted. Further, an insertion portion 32 into which a flange 54 of a connector-integrated brush holder 46 described later is inserted is formed at a position away from the rotation center axis of the flat portion 36 in the radial direction. As shown in FIG. 1, the insertion portion 32 is recessed in the planar portion 36 so as to be stepped down from the planar portion of the planar portion 36, and the connector-integrated brush holder is located at the center of the insertion portion 32. A through hole 34 into which 46 brush holder portions 47 are inserted is formed to penetrate in the plate thickness direction. As will be described later, the through hole 34 has a hole diameter and a hole shape that allow the entire connector-integrated brush holder 46 excluding the flange 54 to be inserted into the through hole 34 from the stator magnet 62 side.

  A disk-shaped rotor (armature) 38 is rotatably accommodated in the housing 12 and is constituted by a rotor main body 40 and a printed coil 42. A cylindrical fixing portion 44 is formed at the center of the rotor main body 40, and the output shaft 26 is fixed to the fixing portion 44 by press-fitting, for example. That is, the disk rotor 38 and the output shaft 26 are configured to rotate integrally. The printed coil 42 has a configuration in which a plurality of coils (not shown) are printed on the surface of the disk member. When power is supplied from a brush 50 described later, a magnetic field is generated from each coil (not shown). ing. The printed coil 42 is pressed in the direction of the rotation axis by the clasp member 45 and assembled to the rotor main body 40.

  The connector-integrated brush holder 46 is formed by integrally forming a brush holder portion 47 and a connector portion 48. The brush holder portion 47 and the connector portion 48 are configured by integral molding with resin, for example. The brush holder portion 47 is provided with a pair of bottomed hole-shaped brush accommodating portions 49 that extend along the rotation axis direction and open to the stator magnet 62 side. Each brush accommodating portion 49 accommodates a brush 50 and a spring 52. Each brush 50 is urged toward the printed coil 42 by the elastic force of the spring 52. Accordingly, each brush 50 protrudes from the opening on the stator magnet 62 side of the brush accommodating portion 49 and is in pressure contact with the printed coil 42.

  The brush holder portion 47 is inserted into a through hole 34 formed in the housing 12. A portion of the brush holder portion 47 closer to the stator magnet 62 than the through hole 34 has a longitudinal direction of the brush holder portion 47. A flange 54 extending in a direction perpendicular to the motor (that is, the motor radial direction) is formed. The flange 54 is formed in a shape surrounding the brush holder portion 47. As shown in FIG. 1, the brush holder portion 47 is held against the end housing 16 by sandwiching a flange 54 between the end housing 16 and the stator magnet 62.

  An accommodation recess 68 is provided on the surface of the flange 54 on the side of the stator magnet 62, and the accommodation recess 68 is provided with a magnetic flux for securing the magnetic flux from the stator magnet 62 in the portion where the through hole 34 is formed. A plate 70 is accommodated. That is, the magnetic flux securing plate 70 is made of a nonmagnetic metal such as aluminum like the end housing 16, and as shown in FIG. 3, partially closes the through hole 34 when viewed from the direction of the rotation axis. Are arranged to be. As shown in FIG. 1, the magnetic flux securing plate 70 is sandwiched and held between the flange 54 and the stator magnet 62.

  An O-ring 56 as a seal member is inserted between the peripheral edge of the through hole 34 and the flange 54. The O-ring 56 is mainly for preventing foreign matter such as water droplets from entering the housing 12 through the through hole 34, and is formed along the shape of the flange 54 so as to surround the brush holder portion 47. Yes. Further, on the outer side of the O-ring 56 of the flange 54, a wall portion 58 that prevents the O-ring 56 from coming off (displaced) is formed so as to protrude from the flange 54 toward the O-ring 56.

  In addition, the wall portion 58 has a function of preventing moisture that has exuded from the O-ring 56 from entering the housing 12 to enhance the waterproof effect, and before the O-ring 56 is crushed more than necessary. A function of preventing the O-ring 56 from being unnecessarily crushed by contacting the end housing 16 may be achieved.

  The brush holder portion 47 is provided with a space portion 55 adjacent to the brush housing portion 49. The space portion 55 is configured by a bottomed hole portion that extends along the rotation axis direction and opens to the stator magnet 62 side. A pigtail 51 connected to the brush 50 is guided to the space 55, and a plug 53 is connected to the end of the pigtail 51. In addition, the plug 53 is connected to a socket 57 provided in a connector portion 48 described below.

  As shown in FIGS. 1 and 2, the connector portion 48 is provided integrally with a portion of the brush holder portion 47 on the opposite side of the stator magnet 62 from the end housing 16. The connector 48 extends from the end of the brush holder 47 along the motor radial direction. The connector 48 is provided with a connection recess 60 into which a connector from an external power source (not shown) is inserted. ing. A space 55 is located on the brush recess 47 side of the connection recess 60 with a bottom wall in between, and a socket 57 as a connected portion is provided at the bottom of the space 55. .

  The socket 57 is provided with a connection terminal 59 connected to a connector connection terminal from an external power source (not shown). The connection terminal 59 extends from the socket 57 along the motor radial direction (perpendicular to the rotation axis direction). It extends outward and passes through the bottom wall of the connection recess 60 and protrudes into the connection recess 60. In this embodiment, the brush 50 and an external power source are electrically connected via the connection terminal 59, the socket 57, the plug 53, and the pigtail 51. Note that the socket 57 may be provided on the pigtail 51 side and the plug 53 may be provided in the space 55.

  The stator magnet 62 faces the disc-shaped rotor 38 in the rotation axis direction, and the surface of the stator magnet 62 opposite to the surface facing the disc-shaped rotor 38 is formed on the end housing 16 as shown in FIG. The flat portion 36 is fixed with an adhesive. Further, as shown in FIG. 4, the stator magnet 62 is formed with a notch fixing portion 64 at a position corresponding to the connector-integrated brush holder 46.

  As will be described later, when the connector-integrated brush holder 46 is fixed to the end housing 16 by the stator magnet 62, the notch fixing portion 64 presses the flange 54 of the connector-integrated brush holder 46 when the peripheral portion of the notch fixing portion 64 is fixed. In addition, the brush 50 accommodated in the brush accommodating portion 49 is provided to penetrate the printed coil 42 side through the notch fixing portion 64. The notch fixing portion 64 is formed with a size smaller than that of the flange 54 so that the peripheral edge portion of the notch fixing portion 64 can press the flange 54.

  In this embodiment, the stator magnet 62 is fixed to the flat portion 36 of the end housing 16 with an adhesive, so that the flange 54 is pressed toward the end housing 16 by the peripheral edge portion of the notch fixing portion 64 of the stator magnet 62. Has been. Further, when the flange 54 is pressed toward the end housing 16, the O-ring 56 is pressed by the peripheral edge portion of the through hole 34 and the flange 54.

  Subsequently, a method of mounting the connector-integrated brush holder 46, the O-ring 56, the stator magnet 62, and the magnetic flux securing plate 70 to the end housing 16 in the assembly process of the electric fan motor 10 having the above configuration will be described below. .

  First, the O-ring 56 is attached to the connector-integrated brush holder 46. In this state, the connector portion 48 and the brush holder portion 47 of the connector-integrated brush holder 46 are sequentially inserted into the through-hole 34 of the end housing 16 from the stator magnet 62 side. The flange 54 of the connector-integrated brush holder 46 is positioned at the insertion portion 32 of the end housing 16. At this time, the entire connector-integrated brush holder 46 is temporarily attached to the end housing 16 so that the O-ring 56 contacts the peripheral edge of the through hole 34 and the flange 54.

  Subsequently, the magnetic flux securing plate 70 is accommodated in the accommodating recess 68 of the connector-integrated brush holder 46. Further, the spring 52 and the brush 50 are sequentially inserted into the brush accommodating portion 49 of the connector-integrated brush holder 46, and a hand or a tool is inserted from the opening on the stator magnet 62 side of the space portion 55, so that the plug 53 on the brush 50 side is inserted. Is inserted into the socket 57 on the connector portion 48 side, and the plug 53 and socket 57 are connected.

  Then, the stator magnet 62 is fixed to the flat portion 36 of the end housing 16 with an adhesive. As a result, the flange 54 is sandwiched between the end housing 16 and the stator magnet 62, whereby the brush holder portion 47 and thus the connector-integrated brush holder 46 as a whole is held with respect to the end housing 16. Further, the magnetic flux securing plate 70 housed in the housing recess 68 of the flange 54 is sandwiched and held between the flange 54 and the stator magnet 62.

  Further, as described above, the stator magnet 62 is fixed to the flat portion 36 of the end housing 16 by bonding, whereby the flange 54 is pressed toward the end housing 16 by the stator magnet 62. The flange 54 is pressed toward the end housing 16 in this way, so that the O-ring 56 is pressed by the peripheral edge portion of the through hole 34 and the flange 54.

  In this embodiment, the adhesive that fixes the stator magnet 62 to the flat portion 36 of the end housing 16 is prevented from being creep-destructed by a reaction force that presses the stator magnet 62 through the flange 54 of the O-ring 56. Therefore, the attractive force of the stator magnet 62 to the housing 12 is set to be stronger than the reaction force that presses the stator magnet 62 through the flange 54 of the O-ring 56.

  The mounting procedure of the connector-integrated brush holder 46, the O-ring 56, the stator magnet 62, and the magnetic flux securing plate 70 to the end housing 16 has been described above, but the mounting procedure is an example, and each mounting procedure is replaced. Of course you can.

  Next, the operation of the electric fan motor 10 having the above configuration will be described.

  In the electric fan motor 10 according to the present embodiment, the connector-integrated brush holder 46 includes a brush holder portion 47 that holds the brush 50 and a connector portion 48 that electrically connects the brush 50 and an external power source. It is the structure provided automatically. Therefore, for example, it is not necessary to rivet the connector part 48 on the end housing 16 or to perform outsert molding. Moreover, the structure for assembling the connector-integrated brush holder 46 to the end housing 16 is such that the flange 54 formed on the brush holder portion 47 of the connector-integrated brush holder 46 is sandwiched between the end housing 16 and the stator magnet 62. This is a simple configuration that is simply held by the end housing 16. Thus, in the electric fan motor according to the present embodiment, a so-called direct connector structure in which the brush 50 and the external power supply are electrically connected by the connector portion 48 can be realized with a simple configuration. As a result, the cost of the electric fan motor 10 can be reduced. That is, the facility cost, the number of parts, and the number of man-hours can be reduced.

  Further, in the electric fan motor 10 according to the present embodiment, the brush holder portion 47 and the connector portion 48 are formed by integral molding with resin, so that the connector-integrated brush holder 46 can be easily manufactured. Thereby, it is possible to further reduce the cost of the electric fan motor 10.

  Further, as described above, even when the through hole 34 into which the brush holder portion 47 is inserted is formed through the end housing 16, the magnetic flux securing plate 70 that closes the through hole 34 is provided as in the present embodiment. Thus, a magnetic circuit can be formed (established) in the portion of the end housing 16 where the through hole 34 is formed, and a magnetic flux can be secured (a reduction loss of magnetic flux can be prevented). Thereby, it is possible to achieve high efficiency of the electric fan motor 10. Further, the fixing structure of the magnetic flux securing plate 70 has a simple configuration that is simply held between the flange 54 and the stator magnet 62, and therefore the electric fan motor 10 is obtained by adding the magnetic flux securing plate 70. The increase in cost can also be suppressed.

  Further, as described above, by closing the through hole 34 with the metal magnetic flux securing plate 70, it is possible to reinforce the strength reduction portion due to the provision of the through hole 34 in the end housing 16. Thereby, the strength of the entire end housing 16 is sufficiently secured.

  In the electric fan motor 10 according to the present embodiment, the plug 53 is connected to the brush 50 via the pigtail 51, and the connector-integrated brush holder 46 is provided with a space portion 55 that opens to the stator magnet 62 side. The connector portion 48 includes a socket 57 provided in the space portion 55 and connected to the plug 53. Therefore, for example, when the electric fan motor 10 is assembled, as described above, a hand, a tool, or the like is inserted from the opening on the stator magnet 62 side of the space portion 55 to insert the plug 53 on the brush 50 side and the socket 57 on the connector portion 48 side. Can be connected. As a result, the cost of the electric fan motor 10 can be reduced by improving the connection workability between the plug 53 and the socket 57.

  Further, although the space portion 55 opens to the stator magnet 62 side, in this embodiment, foreign matters such as water droplets are prevented from entering the housing 12 through the through hole 34 by the O-ring 56. Therefore, the waterproofness of the space 55 can be secured.

  In the electric fan motor 10 according to the present embodiment, the connector portion 48 is provided with a connection terminal 59 connected to an external power supply, and the connection terminal 59 extends along the motor radial direction. ing. Accordingly, it is possible to suppress the protruding amount in the direction of the rotation axis of the connection terminal 59 and thus the entire connector 48. Thereby, the electric fan motor 10 can be thinned.

  Moreover, in the electric fan motor 10 of this embodiment, since the end housing 16 and the brush holder part 47 are comprised by the different body, the process (press process) of the end housing 16 becomes easy. That is, the brush holder portion 47 needs a certain brush length in order to have durability. At this time, if the brush holder portion 47 having a size that can secure a certain brush length is formed integrally with the end housing 16, the brush holder portion 47 protrudes from the end housing 16, so that processing becomes difficult. However, in this embodiment, since the end housing 16 and the brush holder portion 47 are configured separately, the end housing 16 can be easily processed (pressed).

  At this time, when the electric fan motor 10 is used, for example, as a fan motor for cooling the radiator, the electric fan motor 10 is placed in a wet environment, so that the housing is formed through the through hole 34 of the end housing 16. It is expected that a foreign substance such as a water droplet will enter 12.

  However, in the electric fan motor 10 of the present embodiment, the connector-integrated brush holder 46 includes a flange 54 on the stator magnet 62 side of the through hole 34, and the flange 54 and the peripheral portion of the through hole 34 are between them. The O-ring 56 is inserted. The O-ring 56 is pressed by the peripheral edge portion of the through hole 34 and the flange 54 when the flange 54 is pressed toward the end housing 16 by the stator magnet 62. Accordingly, the O-ring 56 is pressed by the peripheral edge portion of the through hole 34 and the flange 54 to ensure waterproofness around the connector-integrated brush holder 46, that is, from the outside through the through hole 34 to the inside of the housing 12. It is possible to prevent foreign matter such as water droplets from entering the surface.

  Moreover, in the electric fan motor 10 of this embodiment, the wall part 58 which protrudes from the flange 54 to the O-ring 56 side is formed in the outer side rather than the O-ring 56 of the flange 54. Accordingly, since the wall portion 58 plays a role of preventing the O-ring 56 from coming off, the movement of the O-ring 56 to the outside of the flange 54 is prevented by the wall portion 58. Thereby, it can prevent that the waterproofness around the brush holder part 47 falls.

  Furthermore, in the electric fan motor 10 of the present embodiment, the stator magnet 62 is fixed to the housing 12 with an adhesive, so that the stator magnet 62 can be easily assembled to the housing 12. The attractive force of the stator magnet 62 to the housing 12 at this time is set to be stronger than the reaction force that presses the stator magnet 62 via the flange 54 of the O-ring 56. Thereby, it is possible to prevent the adhesive that fixes the stator magnet 62 to the flat portion 36 of the end housing 16 from being creep-destructed by a reaction force that presses the stator magnet 62 through the flange 54 of the O-ring 56. .

  Further, in the electric fan motor 10 of the present embodiment, as described above, the O-ring 56 is pressed by the peripheral edge portion of the through hole 34 and the flange 54, so that the motor rotation is performed by the vibration damping function of the O-ring 56. Occasionally, the vibration of the connector-integrated brush holder 46 that accompanies the sliding contact of the brush 50 with the printed coil 42 can be suppressed to prevent abnormal noise.

  As described above in detail, the electric fan motor 10 of the present embodiment can be suitably used as a fan motor for cooling a radiator because it is waterproof.

It is sectional drawing of the electric fan motor which concerns on one Embodiment of this invention. It is an exploded view of the electric fan motor which concerns on one Embodiment of this invention. It is the figure which looked at the end housing with which the connector integrated brush holder which concerns on one Embodiment of this invention was mounted | worn from the stator magnet side. It is the figure which looked at the end housing with which the connector integrated brush holder and stator magnet which concern on one Embodiment of this invention were mounted | worn from the stator magnet side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electric fan motor (electric motor), 12 ... Housing, 14 ... Housing main body, 16 ... End housing, 18, 22 ... Bearing housing part, 20, 24 ... Bearing member, 26 ... Output shaft, 28 ... Opening part, 30 DESCRIPTION OF SYMBOLS ... Projection part, 32 ... Insertion part, 34 ... Through-hole, 36 ... Planar part, 38 ... Disc type rotor, 40 ... Rotor main body part, 42 ... Print coil, 44 ... Fixed part, 46 ... Connector-integrated brush holder, 47 ... Brush holder part, 48 ... Connector part, 49 ... Brush housing part, 50 ... Brush, 51 ... Pigtail, 52 ... Spring, 53 ... Plug (connection part), 54 ... Flange, 55 ... Space part, 56 ... O-ring ( Seal member), 57 ... Socket (connected portion), 58 ... Wall portion, 59 ... Connection terminal, 60 ... Connection recess, 62 ... Stator magnet, 64 ... Notch fixing portion, 68 ... Housing recess , 70 ... magnetic flux securing plate

Claims (7)

A disk-shaped rotor mounted on the output shaft and rotating integrally with the output shaft;
A housing for accommodating the disk-shaped rotor;
A stator magnet facing the disk-shaped rotor in the direction of the rotation axis and having a surface opposite to the surface facing the disk-shaped rotor mounted on the housing;
A brush pressed against the disk-shaped rotor;
A brush holder part that is held in the housing by sandwiching a flange between the housing and the stator magnet, and that is inserted into a through hole formed in the housing in the plate thickness direction and holds the brush. And a connector portion that is provided integrally with a portion of the brush holder portion opposite to the stator magnet from the housing and electrically connects the brush and an external power source. Body brush holder,
A magnetic flux securing plate that closes the through hole and secures a magnetic flux from the stator magnet in a portion where the through hole is formed;
An electric motor comprising:   The electric motor according to claim 1, wherein the brush holder portion and the connector portion are integrally formed of resin. The electric motor according to claim 1, wherein the magnetic flux securing plate is sandwiched and held between the flange and the stator magnet . A connecting portion is connected to the brush via a pigtail,
The connector-integrated brush holder is provided with a space that opens to the stator magnet side,
4. The electric motor according to claim 1, wherein the connector portion includes a connected portion that is provided in the space portion and connected to the connection portion . 5. The connector portion is provided with a connection terminal connected to the external power source,
The electric motor according to any one of claims 1 to 4, wherein the connection terminal extends along a motor radial direction . A seal member is inserted between the peripheral edge of the through hole and the flange,
6. The seal member according to claim 1, wherein the flange is pressed by a peripheral edge portion of the through hole and the flange by pressing the flange toward the housing by the stator magnet. The electric motor according to claim 1. To the output shaft, the electric motor according to any one of claims 1 to 6 fan for the radiator cooling, characterized in that it is fitted.

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