JPWO2018062351A1 - motor - Google Patents

Abstract

A rotor having a shaft centering on a central axis extending in the vertical direction, a stator having a plurality of coils facing the rotor, and a conductive material, the rotor and the stator being accommodated in the vertical direction A holder having a penetrating portion penetrating therethrough, a plurality of coil lead wires extending upward from the plurality of coils, and at least a part of which are disposed in the penetrating portion, and having an insertion hole for passing the coil lead wire And at least one of the plurality of coil lead wires includes a conductive portion for supplying power from the outside and a portion of the conductive portion, the motor having an insulating film. A coating portion, and a conductive coating portion positioned on the upper side of the insulating coating portion to cover a part of the conductive portion and having a conductive coating, and the lower end of the conductive coating portion is the supporting member It covered the circumference.

Description

  The present invention relates to a motor.

  2. Description of the Related Art Conventionally, among bushes used for a motor, there is one in which an insertion port of a lead wire hole of an elastic bush is substantially equal to a lead wire diameter, and a hollow conical surface inclined from the insertion port is formed. Patent Document 1 discloses a motor having such a bush.

Unexamined-Japanese-Patent No. 9-266651 gazette

  However, in the motor having a bush described in Patent Document 1, the exposed wire portion may be oxidized or corroded because the wire portion from which the insulating coating of the lead wire is peeled is exposed. In particular, when connecting with a control unit or the like, if the lead wire is oxidized or corroded, there is a possibility that connection failure may occur and power can not be supplied.

  An object of the present invention is to prevent the conductive portion from being oxidized or corroded.

  A first exemplary invention of the present invention comprises a rotor having a shaft centered on a vertically extending central axis, a stator radially opposed to the rotor and having a plurality of coils, and a conductive material. A holder for accommodating the rotor and the stator and having a penetrating portion vertically penetrating, a plurality of coil lead wires extending upward from the plurality of coils, and at least a part of the penetrating portion; And a support member having an insertion hole through which the coil lead wire passes and made of an insulating material. At least one of the plurality of coil lead wires includes a conductive portion that supplies power from the outside, an insulating coating portion that covers a portion of the conductive portion, and has an insulating coating, and is positioned above the insulating coating portion And a conductive film portion covering a part of the conductive portion and having a conductive film. The lower end of the conductive coating is surrounded by the support member.

  According to the first exemplary invention of the present invention, it is possible to prevent the conductive portion from being oxidized or corroded.

FIG. 1 is an external perspective view of a motor. FIG. 2 is a cross-sectional view of the motor. FIG. 3 is a perspective view of the motor with the holder cylindrical portion and the holder bottom portion removed. FIG. 4 is a perspective view of the motor with the holder cylindrical portion, the holder bottom portion, and the support member removed. FIG. 5 is a perspective view of the motor with the holder cylindrical portion, the holder bottom portion, the holder upper portion, and the support member removed. FIG. 6 is a plan view of the upper part of the holder with the support member removed. FIG. 7 is a perspective view of the upper part of the holder as viewed from above. FIG. 8 is a perspective view of the upper part of the holder as viewed from below. FIG. 9 is a perspective view of the support member as viewed from above. FIG. 10 is a perspective view of the support member as viewed from below. FIG. 11 is a side view of a cross section of the support member. FIG. 12 is a side view of the cross section of the support member of the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are merely examples of the present invention, and the technical scope of the present invention is not to be interpreted in a limited manner. In the drawings, the same components are denoted by the same reference numerals, and the description thereof may be omitted.

  In the following description, the central axis of the rotation of the rotor in the motor is C. The direction in which the central axis C extends is the vertical direction. However, the vertical direction in the present specification is a term used merely for the purpose of explanation, and does not limit the actual positional relationship or direction. That is, the gravity direction is not necessarily downward. Further, in the present specification, a direction parallel to the rotation axis of the motor is "axial direction", a direction perpendicular to the rotation axis of the motor is "radial direction", and a direction along an arc centered on the rotation axis of the motor Each is referred to as "direction".

  Further, in the present specification, “extending in the axial direction” includes, in addition to the state extending in the axial direction strictly, a state extending in a direction inclined at an angle of less than 45 degrees with respect to the axial direction. Similarly, in the present specification, “extending radially” includes, in addition to the strictly radially extending state, a state extending in a direction inclined at an angle of less than 45 degrees with respect to the radial direction.

<1. Embodiment 1>
FIG. 1 is an external perspective view of a motor 1 according to the present embodiment. FIG. 2 is a cross-sectional view of the motor 1. FIG. 3 is an external perspective view of the motor 1 with the holder cylindrical portion and the holder bottom portion removed. FIG. 4 is an external perspective view of the motor 1 with the holder cylinder, the holder bottom, and the support member removed. FIG. 5 is an external perspective view of the motor 1 with the holder cylinder, the holder bottom, the holder upper portion, and the support member removed. In addition, in order to make the component of a motor legible in FIG. 1, the display of a part of upper side of the holder cylinder part 21 is abbreviate | omitted.

  As shown in FIGS. 1 to 5, the motor 1 includes a holder 20, a rotor 30, a stator 40, an upper bearing 51, a lower bearing 52, a bus bar support member 60, a support member 70, a fixing member 78, a bus bar 80, and A control unit 10 is provided. From the supporting member 70, coil lead wires 91U, 91V, 91W, 92U, 92V, and 92W (hereinafter, sometimes referred to as "coil lead wires 91U to 91W" or "coil lead wire 90") are drawn. .

  The holder 20 has a holder tubular portion 21 extending in a cylindrical shape in the vertical direction, and a holder bottom portion 23 located below the holder tubular portion 21. The holder 20 is made of a conductive material such as metal. The holder 20 accommodates the rotor 30 and the stator 40 and the like. The holder 20 has an opening 20a on the upper side. The holder cylinder portion 21 has a cylindrical shape around the central axis C. A holder upper portion 50 is disposed in the holder cylinder portion 21. In the present embodiment, the holder upper portion 50 has a substantially disc shape. The inner circumferential surface 20 b of the holder cylinder 21 is in contact with the outer circumferential surface 50 b of the upper holder 50 and the outer circumferential surface of the stator 40. The holder cylinder portion 21 is fixed to the holder upper portion 50 and the stator 40. A support member 70 and a control unit 10 are disposed inside the holder 20 above the upper holder 50. More specifically, a part of the lower side of the support member 70 is inserted into the through portions 53 a and 53 b (described later) of the upper holder 50.

  The shape of the holder cylinder 21 does not have to be cylindrical, and may be any shape such as a box as long as the stator 40 and the upper part 50 of the holder can be fixed to the inner peripheral surface. Further, the holder cylinder portion 21 may have a shape combining a cylindrical shape and another shape such as a box shape. The inner circumferential surface 20b of the holder cylinder 21 may not be in contact with the stator 40 and the upper holder 50 over the entire circumference, and a part of the inner circumferential surface 20b may be in contact with the stator 40 and the upper holder 50.

  The holder bottom 23 is disposed below the stator 40 and has a lower bearing support 23 a that supports the lower bearing 52, and an output shaft hole 22 axially penetrating the holder bottom 23.

  In the present embodiment, the holder cylindrical portion 21 and the holder bottom portion 23 are a single member, and the holder upper portion 50 is a separate member. However, the holder cylinder portion 21 and the holder upper portion 50 may be a single member, and the holder bottom portion 23 may be a separate member. Moreover, the holder cylinder part 21, the holder bottom part 23, and the holder upper part 50 may be separate members, respectively.

  FIG. 6 is a plan view of the holder upper portion 50 of the present embodiment as viewed from the upper side. FIG. 7 is a perspective view of the upper holder 50 as viewed from above. FIG. 8 is a perspective view of the upper holder 50 as viewed from below. In FIGS. 7 and 8, the support member 70 and the fixing member 78 are attached to the holder upper portion 50.

  The holder upper part 50 is disk shape which has penetration part 53a and 53b, as FIG. 4 and FIG. 6-FIG. 8 show. As shown in FIG. 2, the holder upper portion 50 is disposed on the upper side of the stator 40. The holder upper portion 50 has an opening 50 a around the central axis C. The opening 50 a is a through hole axially penetrating the upper holder 50. At least a portion of the shaft 31 is located inside the opening 50a. The upper holder 50 supports the upper bearing 51. An outer peripheral surface 50 b of the holder upper portion 50 is in contact with the inner peripheral surface 20 b of the holder cylindrical portion 21, and the holder upper portion 50 is fixed to the holder cylindrical portion 21. In the present embodiment, the holder upper portion 50 is fixed to the holder cylindrical portion 21 by shrink fitting. The holder upper portion 50 may be fixed to the holder cylindrical portion 21 by another method such as press fitting.

  As shown in FIGS. 3 and 6, the through portions 53 a and 53 b of the holder upper portion 50 are notched radially inward from the outer peripheral surface side of the holder upper portion 50 and extend in the circumferential direction. The “peripheral surface” of the upper holder portion 50 refers to the outer peripheral portion of a cylinder centered on the central axis C, and does not include the surface where the through portions 53 a and 53 b face the holder cylinder 21. As shown in FIG. 3, FIG. 7 and FIG. 8, the support member 70 is disposed at the position of the penetrating portions 53 a and 53 b. In the through portions 53a and 53b, coil lead wires 91U to 92W are passed upward from the lower side while being supported by the support member 70. The holder upper portion 50 has a recess 54 recessed from the upper side to the lower side. The holder upper portion 50 has a plurality of fixing through holes 56.

  In addition, penetration part 53a and 53b is not limited to the notch shape of this embodiment, What is necessary is just the notch shape which lets at least one of coil lead-out wires 91U-92W from the lower side of holder upper part 50 upper side. Also, the through parts 53a and 53b may be a notch that passes at least one of the coil lead wires 91U to 92W from the lower side to the upper side of the holder upper portion 50, and not all the coil lead wires 91U to 92W are necessarily passed through May be In this case, the coil leader lines 91U to 92W that do not pass through the through portions 53a or 53b may pass through the through holes formed in the upper part 50 of the holder separately from the through portions 53a or 53b.

  Further, the through portion may be a through hole which passes through the upper part 50 of the holder, instead of the notch shape. In this case, at least a portion of the support member 70 is disposed in the through hole. In the through holes, coil lead wires 91U to 92W are passed from the lower side to the upper side while being supported by the support member 70.

  In the present embodiment, the upper bearing 51 and the lower bearing 52 are ball bearings. The upper bearing 51 and the lower bearing 52 rotatably support the shaft 31 circumferentially about the central axis C. The upper bearing 51 is supported by the upper bearing support 50 c of the upper holder 50. The lower bearing 52 is supported by the lower bearing support 23 a of the holder bottom 23. The upper bearing 51 and the lower bearing 52 may be other types of bearings other than ball bearings.

  The rotor 30 has a shaft 31. In the present embodiment, the shaft 31 is substantially cylindrical. The shaft 31 extends in the vertical direction along the central axis C. The shaft 31 may not be solid, and may be hollow.

  The stator 40 is disposed inside the holder 20 and radially outward of the rotor 30, as shown in FIGS. In other words, the stator 40 surrounds the rotor 30 in the circumferential direction. The stator 40 has a stator core 41, an insulator 42, and a coil 43. The stator core 41 is formed of a laminated steel plate in which electromagnetic steel plates are laminated in the axial direction. In the present embodiment, the stator core 41 has an annular shape centered on the central axis C. A plurality of teeth 41 a extending radially inward are disposed on the inner side surface of the stator core 41. The teeth 41 a are circumferentially spaced on the inner surface of the stator core. The insulator 42 is formed of an insulator such as a resin and attached to the teeth 41 a. The coil 43 is constituted by a conducting wire wound around each tooth 41a through the insulator 42, and is disposed on each tooth 41a. As described above, the outer peripheral surface of the stator 40 is fixed to the inner peripheral surface 20 b of the holder 20. The stator 40 has conducting wires respectively extending from coils 43 arranged in circumferential alignment. Although these lead wires are sometimes referred to as coil lead wires, in the present embodiment, they are simply referred to as lead wires in order to be distinguished from the coil lead wires 91U to 92W penetrating the support member 70.

  The bus bar support member 60 supports the bus bar 80. The bus bar 80 is a conductive member that electrically connects the conducting wire derived from the coil 43 at a necessary place. The bus bar support member 60 is an insulating resin member, and can prevent the bus bar 80 and the conductive members disposed around the periphery from coming into contact with each other.

  The support member 70 is disposed on the upper side of the holder upper portion 50 and covers the penetrating portions 53a and 53b. At least a portion of the support member 70 is inserted into the through portions 53a and 53b. Support member 70 is made of an insulating resin material (for example, an insulating rubber material), and coil lead wires 91U to 92W make contact with each other to short and contact with other conductive members. Can be prevented. As shown in FIGS. 9 and 10, the support member 70 has insertion holes 71U, 71V, 71W, 72U, 72V, and 72W (hereinafter referred to as “insertion holes 71U to 72W” or “insertion holes”). 71)).

  FIG. 11 is a partial cross-sectional view of the support member 70. As shown in FIG. As shown in FIGS. 7 to 11, the support member 70 includes a protrusion 73, a base 70 a, a fitting 70 b, and a protrusion 75. The protrusion 73 is a generic name of the protrusions 73U to 74W. The protrusions 73U, 73V, 73W, 74U, 74V, and 74W (sometimes referred to as "projections 73U to 74W") protrude upward from the base 70a.

  As shown in FIG. 10, two fitting portions 70b are disposed on the lower side of the base portion 70a and include a bottom portion 70c and a wall portion 70d. The fitting portion 70 b is shorter than at least one of the circumferential direction and the radial direction in plan view with respect to the base portion 70 a. That is, in the axial direction, the projection area of the fitting portion 70b is smaller than the projection area of the base portion 70a.

  As shown in FIG. 8, the outer surface of the fitting portion 70b is in contact with the inner surface of the through portions 53a and 53b. Thus, the support member 70 can be fixed to the holder upper portion 50. The outer surface of the fitting portion 70b may be in contact with the inner surface of the through portions 53a and 53b over the entire circumference, or may be partially in contact with the inner surface of the through portions 53a and 53b. . As shown in FIGS. 8, 10, and 11, the wall portion 70d has a tubular shape extending downward from the outer surface of the bottom portion 70c. As shown in FIG. 11, the insertion hole 71 penetrates from the wall portion 70 d of the support member 70 through the bottom surface portion 70 c, the fitting portion 70 b and the base portion 70 a to the upper end of the projection portion 73.

  The fitting portion 70b may have a convex shape having a through hole that protrudes downward and allows the coil leader to pass therethrough instead of the wall portion 70d or together with the wall portion 70d.

  The convex portion 75 protrudes downward from the base portion 70 a. The holder upper portion 50 has a recess 54 at an upper position opposite to the protrusion 75, as shown in FIG. The convex portion 75 of the support member 70 is engaged with the concave portion 54 of the upper holder portion 50 in the vertical direction. The protrusion 75 is fixed in the recess 54, for example, by press fitting. Thus, the support member 70 and the upper holder 50 are fixed to each other. Moreover, since the support member 70 has the two convex parts 75, the support member 70 and the holder upper part 50 can be fixed more reliably. The holder upper portion 50 may have a hole that fits with the protrusion 75 instead of the recess 54. Also, the support member 70 may have three or more convex portions 75.

  As shown in FIGS. 1 to 3, coil lead wires 91 </ b> U to 92 </ b> W are respectively passed through the insertion holes 71 </ b> U to 72 </ b> W from the lower side to the upper side of the upper part 50 of the holder. The insertion holes 71 </ b> U to 72 </ b> W are arranged in the circumferential direction so as to be concentric circular arc centering on the central axis C. Since the support member 70 includes the fitting portion 70b, the coil leader lines 91U to 92W can be prevented from coming into contact with the holder 20 and shorting occurs, and deformation such as sink marks may occur in the base portion 70a at the time of formation. Is suppressed. In addition, since the support member 70 has the base portion 70 a, the support member 70 can be prevented from coming off the holder upper portion 50. As a result, at the time of manufacturing the motor, an operator or the like can easily pass the coil lead wires 91U to 92W from the insertion holes 71U to 72W of the support member 70, and the process in manufacturing the motor can be reduced.

  Further, since the fitting portion 70b is hollow having the bottom surface portion 70c and the wall portion 70d, the support member 70 is compared with the case where the fitting portion 70b is formed into a convex shape which is not hollow. Can reduce the material that forms the Further, in the support member 70, since the thickness of the fitting portion 70b can be reduced as compared with the shape in which the fitting portion 70b is not hollow, deformation such as sink marks during molding of the base portion 70a is suppressed. be able to.

  Further, in the motor 1, since the support member 70 has the projection 73, the coil leader lines 91U to 92W are supported while the coil leader lines 91U to 92W and the control unit 10 are electrically insulated. Can.

  Further, in the motor 1, the outer surface of the fitting portion 70b is in contact with the inner surface of the through portions 53a and 53b, so that it is possible to insulate the holder upper portion 50 from the support member 70.

  Further, since the support member 70 has one base portion 70a and two fitting portions 70b, the support member 70 and the holder upper portion 50 can be firmly fixed. In addition, the support member 70 may have three or more fitting parts 70b with respect to one base part 70a. In particular, when the number of the through parts and the fitting parts is increased, the support member 70 is more difficult to come off from the upper part 50 of the holder.

  The fixing member 78 is made of an insulating resin material. As shown in FIGS. 5 and 8, in plan view, the fixing member 78 has a substantially arc shape. The fixing member 78 is disposed below the upper holder 50. The fixing member 78 has a fixing protrusion 79 protruding toward the upper side. The fixing projection 79 penetrates the fixing through hole 56 of the holder upper portion 50 from the lower side to the upper side, is inserted into the lower concave portion 77 of the support member 70, and is fixed by, for example, heat welding. The recess 77 may be a through hole.

  The fixing member 78 sandwiches the support member 70 and the holder upper portion 50. That is, for example, the fixing member 78 and the support member 70 of the resin sandwich the holder upper portion 50 of metal. Thus, the resin fixing member 78 and the resinous support member 70 are firmly fixed by thermal welding or the like. Further, in the present embodiment, the fixing member 78 and the support member 70 are made of the same resin material. Therefore, even if heat or the like generated from the inside of the motor is transmitted to the fixing member 78 and the support member 70, the fixing member 78 and the support member 70 may be deformed or broken under the influence of the difference in thermal expansion coefficient. It is suppressed.

  The coil lead wire 90 (91U to 92W) includes a conductive wire drawn from the coil 43. As shown in FIG. 2, coil lead wires 90 (91U to 92W) are drawn from the stator 40 and the through holes 61 (see FIG. 4) of the bus bar support member 60 and the insertion holes 71U to 72W are from the lower side to the upper side. Pass towards. The motor 1 in the present embodiment has a two-system configuration including two sets of U-phase, V-phase, and W-phase. At the time of driving of the motor, current is supplied to coil lead wires 91U to 91W constituting each of the U-phase, V-phase and W-phase in the first system, and U-phase and V-phase in the second system A current is also applied to coil lead wires 92U to 92W that constitute each phase of the phase and the W phase. With the above configuration, even when energization of the coil of one system is stopped due to a failure of the inverter, for example, at the time of driving the motor, the coil in the other system can be energized, so the motor is rotated. It can be done.

  Although the motor in the present embodiment has a two-system configuration including two sets of U-phase, V-phase, and W-phase, the number of systems can be arbitrarily designed. That is, the motor 1 can be configured as one system, or can be configured as three systems or four or more systems.

  As shown in FIG. 11, the coil leader line 90 passes through the insertion hole 71 of the support member 70. The coil lead-out wire 90 has a conductive portion 90a, an insulating coating portion 90b, and a conductive coating portion 90c. The conductive portion 90 a is a conductive wire drawn from the coil 43. The conductive portion 90a is a conductive line having a relatively low electrical resistance, such as copper, and a current flows when a voltage is applied. The conductive unit 90 a supplies power to the coil 43 from the outside via the control unit 10. Insulating coating 90 b partially covers the periphery of conductive portion 90 a. The insulating coating 90 b is a coating layer covered with a coating such as an insulating resin or rubber. The conductive film portion 90c partially covers the periphery of the conductive portion 90a. The conductive film portion 90c is a film layer covered with a conductive solder film. In the upper part of the coil lead wire 90, the conductive film portion 90c covers the conductive portion 90a, so that corrosion or oxidation of the conductive portion 90a can be prevented. Further, the upper side of the support member 70 is covered with the conductive film portion 90c without exposing the conductive portion 90a. Thereby, the connection between the conductive film portion 90c and the control unit 10 is possible at any place above the support member 70.

  The film of the conductive film portion 90c may not necessarily be a solder film, but may be another film having conductivity. However, by using a solder as a film, a conductive film can be easily formed inexpensively.

The coil lead wire 90 of FIG. 11 is entirely covered with the insulating coating 90 b at a stage before processing in the manufacturing process. In the manufacturing process, the insulating film portion 90b is peeled off from the upper end of the coil lead wire 90 by a predetermined length, and the conductive portion 90a is exposed. Further, by attaching the solder to the exposed conductive portion 90a, the solder is attached to the conductive portion 90a forming the conductive film portion 90c, for example, from the upper end of the conductive portion 90a to the solder bath containing the melted solder. It is performed by inserting etc. However, the solder may be attached to the conductive portion 90a by various methods.

  The coil lead-out wire 90 is inserted into the insertion hole 71 by press-fitting from the lower side to the upper side by a worker at the time of manufacture. As shown in FIG. 11, the insertion hole 71 has a smaller upper inner diameter at least in part. Since the conductive film portion 90 c covered with the film is present on the upper side of the coil lead-out wire 90, the coil lead-out wire 90 is difficult to bend when inserted into the insertion hole 71. Further, the inner diameter of the lower side of the insertion hole 71 is wider than the inner diameter of the upper side. Furthermore, the coil lead wire 90 is inserted into the portion of the insertion hole 71 with the smallest inner diameter while the conductive film portion 90c is in contact. Since the surface of the conductive film portion 90c has a coating of solder, the surface has a lower frictional resistance and is smoother than the conductive portion 90a. In addition, in the step of peeling off the insulating film portion 90b, the surface of the conductive portion 90a may be damaged to cause unevenness. Even if unevenness is generated, the surface of the conductive film portion 90c can be made smoother than the surface of the conductive portion 90a by covering the surface with the film of the solder. Thereby, the coil lead-out wire 90 can be easily inserted into the insertion hole 71 when manufacturing the motor.

  The inner diameter of the inner circumferential surface of the insertion hole 71 is smaller than that of the insulating coating 90 b of the coil lead wire 90 and substantially the same as that of the conductive coating 90 c. The coil leader wire 90 inserted into the insertion hole 71 from the lower side to the upper side can not be inserted any more because the upper end of the insulating coating 90 b abuts the portion where the inner diameter of the insertion hole 71 is reduced. As a result, the coil lead-out wire 90 is supported by the support member 70 and becomes difficult to come off. Further, as shown in FIG. 11, below the support member 70, the conductive coating 90a is not exposed, and the insulating coating 90c is covered. Therefore, the coil lead-out wire 90 and the holder 20 can be reliably insulated.

  In the manufacturing process, the conductive film portion 90c protruding upward from the insertion hole 71 is electrically connected to the control unit 10 by soldering. In the coil lead wire 90 of the present embodiment, the conductive portion 90a is partially exposed between the insulating film portion 90b and the conductive film portion 90c. As a result, the upper end of the insulating film portion 90b and the conductive film portion 90c It is separated from the lower end. When electrically connecting the control unit 10 and the coil lead-out wire 90, corrosion and oxidation become a problem mainly in the upper part of the coil lead-out wire 90 protruding from the support member 70. Therefore, by separating the upper end of the insulating coating 90 b and the lower end of the conductive coating 90 c, the amount of solder used can be suppressed while solving the problems of corrosion and oxidation. In addition, since the insulating film portion 90b and the conductive film portion 90c are not in contact with each other, the insulating film portion 90a is not exposed to high heat due to solder adhesion in the manufacturing process. The insulating coating 90a is relatively weak to heat and may be peeled off by the heat. Therefore, by separating the upper end of the insulating film portion 90b and the lower end of the conductive film portion 90c, generation of dust and the like of the film from the insulating film portion 90a can be prevented.

  However, the upper end of the insulating coating 90 b and the lower end of the conductive coating 90 c do not necessarily have to be separated and may be in contact with each other. In this case, the conductive portion 90a is not exposed. With such a configuration, corrosion or oxidation of the conductive portion 90a can be reliably prevented, and deterioration of electrical characteristics and the like due to corrosion or oxidation of the conductive portion 90a can be prevented.

  Moreover, in order to adjust the height of the control part 10 and the coil lead-out wire 90, the upper end of the coil lead-out wire 90 may be cut | disconnected. At this time, the conductive portion 90a may be exposed on the cut surface.

  The control unit 10 is disposed inside the holder 20 and above the upper holder portion 50. The control unit 10 is a circuit board on which various electronic components such as switching elements are mounted. In the present embodiment, the control unit 10 is, for example, a rigid substrate. The control unit 10 has, for example, a rectangular shape, and has end portions in four directions. An external power supply or the like (not shown) supplies necessary drive power to each of the coil lead wires 91U to 92W through the control unit 10. The control unit 10 includes an inverter circuit for driving the motor 1 and the like. As described above, the coil lead wires 91U to 92W are drawn upward through the penetrating portions 53a and 53b located radially outward of the holder upper portion 50. Therefore, when the control unit 10 is disposed inside the holder 20, the coil lead wires 91U to 92W can be electrically connected in the vicinity of the end of the control unit 10. As a result, it is possible to secure a wide space for arranging the wiring and the electronic component on the control unit 10. Further, since the coil leader is drawn through the support member and the notch, the space for drawing the coil leader can be reduced, and the motor can be miniaturized.

  The control unit 10 may not be disposed inside the holder 20 but may be disposed outside the holder 20. For example, the control unit 10 may be disposed on the upper side of the holder upper portion 50 and radially inward of the inner side surface of the holder 20. Even when control unit 10 is arranged in this manner, coil lead wires 91U to 92W can be electrically connected in the vicinity of the end of control unit 10, and a relatively large arrangement space for control unit 10 is secured. And so on.

<Method of Manufacturing Motor 1>
When manufacturing the motor 1, first, the insulator 42 is attached to the stator core 41, and a conductive wire is wound around the insulator 42 to form the coil 43. Next, in coil lead wires 91U to 92W all covered with insulating coating 90b derived from coil 43, insulating coating 90b of a predetermined length is peeled from the end to expose conductive part 90a. . Next, the conductive portion 90a is inserted into the solder bath containing the melted solder, and the coating layer of the conductive film portion 90c which is a conductor is formed on the surface of the conductive portion 90a. The formation of the conductive film portion 90c on the surface of the conductive portion 90a may be performed by another method. As a result, coil lead wires 91U to 92W having the upper portion having the conductive film portion 90c and the lower portion having the insulating film portion 90b are formed.

  Next, the tip of each of the coil lead wires 91U to 92W is inserted from the lower side to the upper side into the through hole 61 of the bus bar support member 60. Next, the tip of each of the coil lead wires 91U to 92W is inserted from the lower side to the upper side of the through parts 53a and 53b of the upper part 50 of the holder. Then, the insertion holes 71U to 72W of the support member 70 are press-fit from the lower side to the upper side. At this time, the coil lead wires 91U to 92W can not be inserted any more at the position where the upper end of the insulating coating 90b hits the portion where the inner diameter of the insertion holes 71U to 72W is reduced. After being press-fit into the support member, the support member 70 is fixed to the upper portion of the holder. The step of passing coil lead wires 91U to 92W through insertion holes 71U to 72W may be before the support member 70 is fixed to the holder upper portion 50, or after the support member 70 is fixed to the holder upper portion 50. It may be

  Next, the stator 40 with the coil lead wires 91U to 92W inserted in the bus bar support member 60 and the support member 70 in the above process and the rotor 30 including the shaft 31 are inserted into the holder 20 by a method such as shrink fitting or press fitting. Insert and fix the stator 40 and the rotor 30 to the holder 20. Then, the conductive portion 90a having the conductive film portion 90c which comes out upward from the support member 70 is connected to a predetermined place of the control portion 10 by soldering or the like. Thus, the motor 1 is assembled.

<2. Embodiment 2>
Next, a second embodiment of the present invention will be described. The motor 1a of this embodiment has substantially the same configuration as the motor 1 of Embodiment 1, but the positions of the insulating coating 90b and the conductive coating 90c in the coil lead-out wire 90 inserted in the support member 70 are different. In the following description, only the positional relationship between the support member 70 and the coil lead wire 90, which is different from the first embodiment, will be described, and the description of the portions common to the first embodiment will be omitted.

  FIG. 12 is a cross-sectional view of the support member 70 in which the coil leader 90 is inserted. As shown in FIG. 12, the coil lead-out wire 90 has a conductive portion 90a, an insulating coating portion 90b, and a conductive coating portion 90c. The insulating coating 90 b covers the conductive portion 90 a to a position above the upper end of the insertion hole 71 of the support member 70. The conductive portion 90a is exposed above the upper end of the portion covered by the insulating film portion 90b, and is further covered by the conductive film portion 90c on the upper side. The lower end of the conductive film portion 90 c is located above the upper end of the insertion hole 71 of the support member 70. The lower end of the conductive film portion 90 c is located below the lower end of the control unit 10. In such a coil leader 90, since the conductive portion 90a on the upper side of the coil leader 90 is covered with the conductive film portion 90c, the coil leader 90 can be hardly bent and the surface becomes smooth. There is. Therefore, for example, it becomes possible to easily insert the coil lead wire 90 into the through hole of the control unit 10 or the like.

<Method of Manufacturing Motor 1>
When manufacturing the motor 1, first, the insulator 42 is attached to the stator core 41, and a conductive wire is wound around the insulator 42 to form the coil 43. Next, coil lead wires 91U to 92W entirely covered with the insulating coating 90b, which are drawn out from the coil 43, are inserted from the lower side to the upper side into the through holes 61 of the bus bar support member 60. Next, the tip of each of the coil lead wires 91U to 92W is inserted from the lower side to the upper side of the through parts 53a and 53b of the upper part 50 of the holder. Then, the insertion holes 71U to 72W of the support member 70 are press-fit from the lower side to the upper side. After being press-fitted into the support member, the support member 70 is fixed to the upper holder 50. The step of passing coil lead wires 91U to 92W through insertion holes 71U to 72W may be before the support member 70 is fixed to the holder upper portion 50, or after the support member 70 is fixed to the holder upper portion 50. It may be

  Next, the insulating film portion 90b of a predetermined length is peeled off from the upper end portion of the coil lead wires 91U to 92W to expose the conductive portion 90a. Next, the conductive portion 90a is inserted into a solder bath containing the melted solder, and a conductive coating portion 90c which is a coating layer of the solder which is a conductor is formed on the surface of the conductive portion 90a. The formation of the conductive film portion 90c on the surface of the conductive portion 90a may be performed by another method. As a result, a coil lead-out wire 90 having an upper portion having the conductive film portion 90c and a lower portion having the insulating film portion 90b is formed.

  The subsequent steps are the same as the steps of the first embodiment, and thus the description thereof is omitted.

  Peeling of insulating coating 90b of coil leader 91U to 92W may be performed before passing coil leader 91U to 92W through insertion holes 71U to 72W of support member 70, or the through hole of bus bar support member 60. It may be done before passing 61.

<3. Other>
The specific description of the embodiment of the present invention has been described above. In the above description, the description is merely an embodiment, and the scope of the present invention is not limited to the one embodiment, and can be broadly interpreted to a range that can be grasped by those skilled in the art.

  The motor of the present invention is suitably applied particularly as a motor for electric power steering. However, the motor of the present invention can also be applied to applications other than those for power steering, and is also applicable to, for example, a pump, a compressor, and the like.

  The present invention can be used, for example, as a motor, a pump, a compressor or the like mounted on a vehicle such as for electric power steering.

DESCRIPTION OF SYMBOLS 1 ... Motor 10 ... Control part 20 ... Holder 20a ... Opening part 20b ... Inner peripheral surface 21 ... Holder cylinder part 22 ... Output shaft hole 23 ... Holder bottom part 23a ... Lower side bearing support part 30 ... Rotor 31 ... Shaft 40 ... Stator 41 ... Stator core 41a ... Tees 42 ... Insulator 43 ... Coils 50, 50d, 50h, 50i ... Holder upper part 50a ... Openings 50b ... Outer peripheral surface 50c ... Upper bearing support parts 50e, 50f, 50g ... Holes 51 ... Upper bearing 52 ... Lower Side bearings 53, 53a to 53d ... penetrating portions 54, 55 ... recessed portions 56, 56a ... fixing through holes 60 ... bus bar supporting members 61 ... through holes 70, 70e, 70f ... supporting members 70a ... base portions 70b ... fitting portions 70c ... Bottom surface portion 70d ... Wall portion 71, 71U to 72W ... Insertion hole 73U to 74W ... Projection portion 73, 7 3U to 74W: projection 75, 75a, 76: projection 77: recess 77a: hole 78, 78a: fixing member 79, 79a: fixing projection 80: bus bar 90, 91U to 92W: coil lead wire 90a: conductive portion 90b: Insulating coating 90c: Conductive coating

Claims (8)

A rotor having a shaft centered on a vertically extending central axis,
A stator facing the rotor and having a plurality of coils;
A holder made of a conductive material, containing the rotor and the stator, and a penetration portion penetrating in the vertical direction;
A plurality of coil lead wires extending upward from the plurality of coils;
A support member at least a part of which is disposed in the through portion and has an insertion hole through which the coil lead wire passes, and is made of an insulating material;
Equipped with
At least one of the plurality of coil leads is:
A conductive part that supplies power from the outside;
An insulating coating portion covering a part of the conductive portion and having an insulating coating;
A conductive film portion located on the upper side of the insulating film portion to cover a part of the conductive portion and having a conductive film;
The lower end of the conductive coating is surrounded by the support member,
motor. The upper end of the insulating coating is surrounded by the support member,
The motor according to claim 1. The conductive film is a solder film,
The motor according to claim 1 or 2. The inner peripheral surface of the insertion hole has a small upper inner diameter at least in part,
The conductive coating portion is in contact with the inner periphery of the portion with the smallest inner diameter of the insertion hole.
The motor according to any one of claims 1 to 3. The lower end of the conductive coating portion is in contact with the upper end of the insulating coating portion;
The motor according to any one of claims 1 to 4. The lower end of the conductive coating and the upper end of the insulating coating are separated from each other.
The motor according to any one of claims 1 to 4. It further has a control unit on which electronic components are mounted,
The control unit is electrically connected to the conductive film unit.
The motor according to any one of claims 1 to 6. The motor according to any one of claims 1 to 7, which is used for electric power steering.

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