WO2023119801A1 - Electric motor and terminal - Google Patents

Electric motor and terminal Download PDF

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Publication number
WO2023119801A1
WO2023119801A1 PCT/JP2022/037990 JP2022037990W WO2023119801A1 WO 2023119801 A1 WO2023119801 A1 WO 2023119801A1 JP 2022037990 W JP2022037990 W JP 2022037990W WO 2023119801 A1 WO2023119801 A1 WO 2023119801A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
terminal
plate portion
electric motor
brush
Prior art date
Application number
PCT/JP2022/037990
Other languages
French (fr)
Japanese (ja)
Inventor
元 溝江
拓也 小島
貴洋 浅野
宏和 木倉
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2023119801A1 publication Critical patent/WO2023119801A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/14—Circuit arrangements for improvement of commutation, e.g. by use of unidirectionally conductive elements
    • 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
    • H02K5/14—Means for supporting or protecting brushes or brush holders

Definitions

  • the present disclosure relates to terminals used in electric motors and electrical equipment such as electric motors.
  • Electric motors are widely used not only in the field of household electric appliances such as vacuum cleaners, but also in the field of electrical components such as automobiles.
  • an electric blower mounted on a vacuum cleaner uses an electric motor to rotate a rotary fan.
  • Electric motors are used in two-wheeled or four-wheeled vehicles to drive cooling fans such as radiators.
  • the brushed electric motor includes a stator, a rotor rotated by the magnetic force of the stator, a commutator attached to a rotating shaft of the rotor, and brushes in sliding contact with the commutator. Electric power is supplied to the brush from an external power source through a pair of power supply terminals (for example, a positive terminal and a negative terminal connected to a DC power supply) attached to a brush holder or the like.
  • a pair of power supply terminals for example, a positive terminal and a negative terminal connected to a DC power supply
  • an electric motor used for a cooling fan for a radiator in a vehicle is required to reduce noise of a predetermined frequency.
  • electric motors for vehicles are required to reduce electromagnetic noise in the 30 to 200 MHz band (CISPR25 ALSE (absorber-lined shielded enclosure) noise band).
  • noise can be suppressed by reducing the spark between the brush and commutator, which is the source of noise, or by shielding the noise with a metal bracket or the like. ing.
  • Patent Document 1 A technique for suppressing noise by connecting a capacitor in parallel between a pair of power supply terminals has also been proposed (see Patent Document 1, for example).
  • the capacitor is housed inside the electric motor, for example, by being mounted on a circuit board arranged inside the housing of the electric motor.
  • An object of the present disclosure is to provide an electric motor and a terminal that can be made thinner even if an electronic component with leads such as a capacitor is housed inside.
  • one aspect of the electric motor according to the present disclosure includes a commutator, a brush in contact with the commutator, a brush holder that holds the brush and has a capacitor storage portion, and an electric motor for the brush.
  • a capacitor having terminals connected to each other, a main body portion housed in the capacitor housing portion, and leads drawn out from the main body portion, wherein the terminals include a top plate portion and the top plate. and an upright plate portion erected with respect to the portion, and an insertion hole through which the lead is inserted is formed in the upright plate portion.
  • one aspect of the terminal according to the present disclosure includes a top plate portion and a standing plate portion erected with respect to the top plate portion, and the leads of an electronic component with leads are attached to the standing plate portion.
  • An insertion hole is formed for insertion.
  • FIG. 1 is an external perspective view of the electric motor according to the embodiment when viewed obliquely from above.
  • FIG. 2 is an external perspective view of the electric motor according to the embodiment when viewed obliquely from below.
  • FIG. 3 is a cross-sectional view of the electric motor according to the embodiment, taken along one plane.
  • FIG. 4 is a cross-sectional view when the electric motor according to the embodiment is cut along another plane.
  • FIG. 5 is a perspective view showing the configuration of a brush holder to which various parts are attached in the electric motor according to the embodiment. 6 is an exploded perspective view of the various components and brush holder shown in FIG. 5;
  • FIG. 7 is a cross-sectional perspective view showing a configuration of part of the electric motor according to the embodiment.
  • FIG. 8 is a perspective view of a terminal used in the electric motor according to the embodiment, viewed obliquely from above.
  • FIG. 9 is a perspective view of a terminal used in the electric motor according to the embodiment, viewed obliquely from below.
  • 10A is a top view showing a configuration of a terminal according to the embodiment;
  • FIG. 10B is a front view showing the configuration of the terminal according to the embodiment;
  • FIG. 10C is a left side view showing the configuration of the terminal according to the embodiment;
  • FIG. 10D is a right side view showing the configuration of the terminal according to the embodiment;
  • FIG. FIG. 11 is a cross-sectional view of a connection structure between terminals and capacitors in the electric motor according to the embodiment.
  • FIG. 12 is a side cross-sectional view of a connection structure between terminals and capacitors in the electric motor according to the embodiment.
  • FIG. 13A is a diagram showing how the terminals are attached to the brush holder.
  • FIG. 13B is a diagram showing a state after the terminals are attached to the brush holder.
  • FIG. 13C is a diagram showing how the first capacitor is arranged in the brush holder.
  • FIG. 13D is a diagram showing how the main body of the first capacitor is housed in the capacitor housing portion of the brush holder.
  • FIG. 13E is a diagram showing a state after the body portion of the first capacitor is housed in the capacitor housing portion of the brush holder.
  • FIG. 13F shows the state after connecting the second capacitor to the terminals.
  • FIG. 14 is a perspective view showing a configuration of a brush holder to which various parts are attached in the electric motor according to Modification 1.
  • FIG. FIG. 15 is a perspective view showing a configuration of a brush holder to which various parts are attached in an electric motor according to Modification 2.
  • FIG. 16 is a cross-sectional view of an electric motor according to Modification 2.
  • FIG. 17 is an enlarged cross-sectional view of an electric motor according to Modification 3.
  • FIG. FIG. 18 is an enlarged cross-sectional view of an electric motor according to Modification 4.
  • each figure is a schematic diagram and is not necessarily strictly illustrated. Also, in each figure, the same reference numerals are assigned to substantially the same components as those in other figures, and duplicate descriptions will be omitted or simplified. Also, in this specification, the terms “upper” and “lower” do not necessarily indicate upward (vertically upward) and downward (vertically downward) directions in absolute spatial recognition.
  • FIG. 1 is an external perspective view of an electric motor 1 according to an embodiment when viewed obliquely from above.
  • FIG. 2 is an external perspective view when the electric motor 1 according to the embodiment is viewed obliquely from below.
  • 3 and 4 are cross-sectional views of the electric motor 1 according to the embodiment.
  • FIG. 3 is a cross-sectional view taken along a plane passing through the axis C of the rotating shaft 21 and passing through the brush 40. As shown in FIG. FIG.
  • FIG. 4 is a cross-sectional view taken along a plane passing through the axis C of the rotating shaft 21 and passing through the capacitor housing portion 62 of the brush holder 60.
  • FIG. 5 is a perspective view showing the configuration of a brush holder 60 to which various parts are attached in the electric motor 1 according to the embodiment.
  • FIG. 6 is an exploded perspective view of the various components and brush holder 60 shown in FIG.
  • the electric motor 1 includes a stator 10 (stator) and a rotor 20 (rotor) rotated by the magnetic force of the stator 10 .
  • the electric motor 1 is a brushed electric motor.
  • the electric motor 1 further includes a commutator 30 attached to a rotating shaft 21 of the rotor 20, at least one brush 40 in contact with the commutator 30, a brush spring 50 for pressing the brush 40 against the commutator 30, A brush holder 60 holding the brush 40 and a cover plate 70 covering the brush 40 are provided.
  • the electric motor 1 further includes terminals 80 electrically connected to the brushes 40 and a capacitor 90 connected to the terminals 80. As shown in FIGS. Electric motor 1 also includes bearing 100 , first bracket 111 , and second bracket 112 . As shown in FIGS. 1 and 2, electric wires 120 are connected to the electric motor 1 .
  • the electric motor 1 is a type of direct current motor (DC motor) driven by direct current.
  • a magnet is used as the stator 10 in the electric motor 1 .
  • An armature having a coil 22 is used as the rotor 20 in the electric motor 1 .
  • the electric motor 1 is a flat-type brushed coreless motor (flat motor) mounted on a two-wheeled or four-wheeled vehicle. Therefore, the stator 10 and rotor 20 do not have a core (iron core).
  • the electric motor 1 has a thin and light configuration as a whole. Specifically, the electric motor 1 is a small motor used for a radiator cooling fan in a vehicle.
  • the outer diameter (diameter) ⁇ of the electric motor 1 is 120 mm or less. As an example, the outer diameter ⁇ of the electric motor 1 is ⁇ 60 mm, ⁇ 70 mm, ⁇ 90 mm, or the like.
  • the electric motor 1 is driven by an input voltage of DC 12V.
  • the stator 10 is arranged with a minute air gap between it and the rotor 20 .
  • the stator 10 generates magnetic force acting on the rotor 20 .
  • the stator 10 is configured to generate magnetic flux on the air gap surface with the rotor 20 .
  • the rotor 20 forms a magnetic circuit together with the stator 10, which is an armature.
  • the stator 10 as a whole is substantially doughnut-shaped.
  • the stator 10 is configured such that N poles and S poles alternately and evenly exist on the air gap surface with the rotor 20 along the circumferential direction of the rotating shaft 21 .
  • the stator 10 is a magnetic field that creates magnetic flux for generating torque.
  • the stator 10 is composed of a plurality of magnets (magnets).
  • the magnets forming the stator 10 are, for example, permanent magnets.
  • the direction of the main magnetic flux generated by the stator 10 (magnet) is along the direction in which the rotating shaft 21 extends.
  • Stator 10
  • the rotor 20 has a rotating shaft 21 and coils 22 . Also, the rotor 20 is a coreless rotor that does not have a core.
  • the rotor 20 rotates around the direction of the axis C along which the rotating shaft 21 extends (also referred to simply as the "axis direction"). Rotor 20 generates a magnetic force acting on stator 10 .
  • the direction of the main magnetic flux generated by the rotor 20 is along the axial center C direction along which the rotating shaft 21 extends.
  • the rotor 20 is arranged facing the stator 10 .
  • the rotor 20 faces the stator 10 in the axial center C direction along which the rotating shaft 21 extends.
  • the coil 22 of the rotor 20 and the stator 10 face each other in the direction of the axis C along which the rotating shaft 21 extends. That is, the coil 22 and the stator 10 are arranged in the direction of the axis C of the rotating shaft 21 .
  • the rotating shaft 21 is a shaft having an axis C.
  • the rotating shaft 21 is an elongated rod-shaped member.
  • the rotating shaft 21 is a metal rod made of a metal material such as SUS (Stainless Used Steel).
  • An axis C included in the rotating shaft 21 is the center of rotation when the rotor 20 rotates.
  • the longitudinal direction of the rotating shaft 21, that is, the direction in which the rotating shaft 21 extends (stretching direction) is the axial center C direction.
  • the rotating shaft 21 is supported by bearings 100 .
  • the bearing 100 rotatably supports the rotating shaft 21 .
  • the rotating shaft 21 is press-fitted into the bearing 100 .
  • Bearing 100 is held by first bracket 111 . Specifically, the bearing 100 is press-fitted into a recess provided in the first bracket 111 and fixed.
  • bearing 100 is a ball bearing.
  • bearing 100 is a deep groove ball bearing.
  • the first end 21a of the rotating shaft 21 is the output-side end (output shaft).
  • a first end 21 a of the rotary shaft 21 protrudes from the first bracket 111 and the bearing 100 .
  • a first end portion 21 a of the rotating shaft 21 is an end portion of the bearing 100 and the commutator 30 of the rotating shaft 21 on the side of the bearing 100 .
  • a load such as a rotating fan is attached to the first end portion 21a.
  • the electric motor 1 in which a rotating fan is attached to the rotating shaft 21 can be used as, for example, a cooling fan and an electric blower.
  • the second end 21 b of the rotary shaft 21 is the end (counter-output shaft) on the non-output side and does not protrude from the second bracket 112 .
  • the first bracket 111 and the second bracket 112 are made of metal material, for example.
  • the first bracket 111 and the second bracket 112 are made of a ferrous material such as a cold-rolled steel plate (SPC) material or a metal such as aluminum.
  • SPC cold-rolled steel plate
  • the first bracket 111 and the second bracket 112 constitute a housing.
  • a stator 10 and a rotor 20 are arranged in this housing.
  • the first bracket 111 is an outer shell member of the electric motor 1. As shown in FIGS. The first bracket 111 is formed in a bottomed tubular shape having a bottom portion and a cylindrical side wall portion. Magnets forming the stator 10 are fixed to the bottom of the first bracket 111 . The coils 22 of the rotor 20 are surrounded by side walls of the first bracket 111 .
  • the material of the first bracket 111 and the second bracket 112 is not limited to the metal material, and may be a resin material. However, from the viewpoint of suppressing noise generated from the electric motor 1, the first bracket 111 and the second bracket 112 are preferably made of a metal material.
  • the coils 22 of the rotor 20 are wound coils.
  • the rotor 20 has multiple coils 22 .
  • the multiple coils 22 are armature windings configured by electric wires.
  • the plurality of coils 22 are wound so as to generate magnetic force acting on the stator 10 when current flows.
  • the direction of the main magnetic flux generated by each coil 22 is the axial center C direction along which the rotating shaft 21 extends.
  • the plurality of coils 22 are wound in a flat shape, and the coil surfaces are arranged in a posture facing the axial center C direction along which the rotating shaft 21 extends.
  • Each coil 22 is composed of an insulating covered wire having a core wire made of metal such as copper or aluminum and an insulating film covering the core wire.
  • Each of the plurality of coils 22 is a thin wound coil having a coil layer in which the insulated wire is wound in a plane.
  • each of the plurality of coils 22 is configured by, for example, one or a plurality of coil layers in which an insulated wire is wound in a substantially fan shape in a plan view.
  • the plurality of coils 22 configured in this way are arranged so as to surround the rotating shaft 21 when viewed from the axial center C direction along which the rotating shaft 21 extends.
  • Each of the multiple coils 22 is electrically connected to the commutator 30 . Specifically, each of the multiple coils 22 is electrically connected to one of the multiple commutator segments 31 forming the commutator 30 . Therefore, current flows through each of the plurality of coils 22 via the commutator segments 31 with which the brushes 40 are in contact.
  • a plurality of coils 22 are covered with molding resin 23 . That is, the plurality of coils 22 are resin molded. Therefore, the plurality of coils 22 are integrally molded together with the molding resin 23 by being covered with the molding resin 23 . After the plurality of coils 22 are molded, the outer shape of the mold resin 23 is circular in plan view.
  • the mold resin 23 is made of an insulating resin material such as phenol resin or unsaturated polyester (Bulk Molding Compound (BMC)).
  • the mold resin 23 may be either thermosetting resin or thermoplastic resin.
  • the commutator 30 is attached to the rotating shaft 21 . Therefore, the commutator 30 rotates together with the rotating shaft 21 as the rotor 20 rotates. In this embodiment, the commutator 30 is attached to the second end 21b of the rotating shaft 21 . A commutator 30 attached to the rotating shaft 21 may be part of the rotor 20 .
  • the commutator 30 has a plurality of commutator pieces 31 (commutator segments) provided along the rotating direction of the rotating shaft 21 .
  • the plurality of commutator segments 31 are annularly arranged along the rotation direction of the rotation shaft 21 so as to surround the rotation shaft 21 .
  • Each commutator piece 31 is an elongated member extending in the longitudinal direction of the rotating shaft 21 .
  • the plurality of commutator segments 31 are conductive terminals made of a metal material such as copper.
  • the multiple commutator segments 31 are electrically connected to the coils 22 of the rotor 20 .
  • the plurality of commutator segments 31 are arranged insulated from each other.
  • the multiple commutator segments 31 are electrically connected by the coils 22 of the rotor 20 .
  • the commutator 30 is a molded commutator.
  • the commutator 30 has a configuration in which a plurality of commutator segments 31 are molded with molding resin. In this case, the plurality of commutator segments 31 are embedded in the molding resin so that their surfaces are exposed.
  • the mold resin is the commutator body.
  • the mold resin is a substantially tubular member having a through hole into which the rotary shaft 21 is inserted.
  • the mold resin is, for example, a molded resin body made of an insulating resin material such as a thermosetting resin.
  • At least one brush 40 is in contact with the commutator 30 .
  • the tip of the brush 40 is in contact with the commutator piece 31 of the commutator 30 . Since the commutator 30 rotates as the rotating shaft 21 rotates, the brush 40 keeps contacting all the commutator segments 31 sequentially.
  • the brush 40 is a power supply brush for supplying power to the coil 22. Specifically, the brush 40 supplies power to the coil 22 by contacting the commutator segments 31 of the commutator 30 .
  • the brush 40 is connected to a terminal 80 fixed to the brush holder 60 by a pigtail wire. The contact of the brushes 40 with the commutator segments 31 causes the armature current supplied from the terminals 80 to the brushes 40 to flow through the coils 22 via the commutator segments 31 .
  • the brush 40 is a conductive carbon brush made of carbon, and is a substantially elongated rectangular parallelepiped.
  • the brush 40 is preferably a carbon brush containing metal such as copper.
  • Such a brush 40 can be produced, for example, by pulverizing a kneaded material obtained by kneading graphite powder, copper powder, a binder resin, and a curing agent, compressing and molding the material into a rectangular parallelepiped, and firing the material.
  • a plurality of brushes 40 are provided. Specifically, as shown in FIGS. 3 and 5, the electric motor 1 is provided with two brushes 40 .
  • the two brushes 40 are arranged at 180° intervals along the rotation direction of the rotor 20 . That is, the angle formed by the longitudinal directions of the two brushes 40 is 180°.
  • the angle formed by the two brushes 40 may not be 180°, and may be 90° such as 60°. It may be below.
  • the brushes 40 are always in contact with the commutator segments 31 of the commutator 30 under pressure from the brush springs 50 . That is, the brushes 40 are pressed against the commutator 30 by the brush springs 50 . In this manner, the brushes 40 receive the pressing force from the brush springs 50 and come into sliding contact with the commutator 30 .
  • the brush 40 is arranged so as to be movable in a direction (radial direction) intersecting with the axial center C direction along which the rotating shaft 21 extends due to wear with the commutator 30 .
  • the brush springs 50 are provided according to the number of brushes 40. Since the electric motor 1 is provided with two brushes 40, two brush springs 50 are also provided.
  • the brush 40 and brush spring 50 are housed in a brush holder 60 and covered with a cover plate 70 .
  • the brush spring 50 applies pressure (spring pressure) to the brush 40 by spring elastic force (spring restoring force) to urge the brush 40 toward the commutator 30 .
  • spring pressure spring pressure
  • spring elastic force spring restoring force
  • the brush spring 50 is a constant force spring. Therefore, the brush spring 50 applies a uniform load to the brush 40 . That is, the brush spring 50, which is a constant force spring, applies a uniform pressing force to the brush 40. As shown in FIG. Note that the brush spring 50 is not limited to a constant force spring, and may be a compression coil spring, a torsion spring, or the like.
  • the brush spring 50 which is a constant load spring, is made of a strip-shaped wire rod.
  • the brush spring 50 which is a constant force spring, is a spiral spring.
  • a brush spring 50 which is a constant force spring, has a spiral portion 50a (coil portion) formed by spirally winding a strip-shaped wire.
  • the brush spring 50 which is a constant force spring, is made of, for example, a strip-shaped wire rod made of a metal material or the like.
  • the brush spring 50 which is a constant force spring, is made of a long strip-shaped metal plate. Therefore, the spiral portion 50a is a portion of the constant force spring in which a long strip-shaped metal plate is spirally wound multiple times only in one direction.
  • the brush spring 50 which is a constant force spring, generates a force (spring restoring force) to return to the original spiral state by extending one end of the wire rod from the spiral portion 50a.
  • the brush spring 50 presses the brush 40 against the commutator 30 with the spiral portion 50a. Specifically, the brush spring 50 imparts a load to the brush 40 by the spring restoring force of the spiral portion 50 a when the spiral portion 50 a contacts the rear end portion of the brush 40 .
  • the load with which the brush springs 50 press the brushes 40 against the commutator 30 is preferably at least 1 time the radial load generated during the rotation of the rotor 20 .
  • the brush spring 50 is arranged so that the spiral axis of the spiral portion 50a and the direction of the axis C along which the rotating shaft 21 extends are twisted. That is, the brush spring 50 is installed so that the spiral portion 50a is vertically placed, and the spiral surface (coil surface) of the spiral portion 50a is parallel to the axis C of the rotating shaft 21. As shown in FIG.
  • Electric power is supplied to the brushes 40 from an external power supply arranged outside the electric motor 1 via terminals 80 .
  • the external power supply is a power supply that exists outside the electric motor 1 .
  • the external power supply supplies the electric motor 1 with a predetermined input voltage.
  • the external power supply is a DC power supply that supplies the electric motor 1 with an input voltage of DC 12V.
  • the terminals 80 receive electric power that energizes the coils 22 of the rotor 20 via the brushes 40 . Specifically, since the external power supply is a DC power supply, the terminal 80 receives a DC voltage as an input voltage.
  • the electric motor 1 is provided with two terminals 80 .
  • one terminal (first terminal) of the two terminals 80 is the high voltage side terminal (positive terminal).
  • the other terminal (second terminal) of the two terminals 80 is the low voltage side terminal (minus terminal).
  • the two terminals 80 are attached to the brush holder 60 .
  • An electric wire 120 is connected to the terminal 80 .
  • Terminal 80 receives power from an external power source via wire 120 .
  • the electric wire 120 is a feeder line for supplying power to the terminal 80 .
  • the electric wire 120 is a harness.
  • the electric wire 120 is connected to each of the two terminals 80 . That is, two electric wires 120 are connected to the electric motor 1 .
  • the wire 120 connected to the terminal 80 which is the high-voltage side terminal, is the high-voltage side feeder line (positive side wiring).
  • the wire 120 connected to the terminal 80 which is the low-voltage side terminal, is the low-voltage side feeder line (negative side wiring).
  • Each electric wire 120 is an insulated wire such as a vinyl wire, and has a core wire made of a conductor such as copper and an insulating coating covering the core wire.
  • the brush 40 and the terminal 80 are connected by a pigtail wire. Specifically, one end of the pigtail wire is connected to the brush 40 . The other end of the pigtail wire is connected to terminal 80 . Electric power is supplied from an external power supply to the terminal 80 via the electric wire 120 , thereby supplying current to the brush 40 via the pigtail connected to the terminal 80 .
  • the current supplied to the brushes 40 flows through the coils 22 via the commutator segments 31 of the commutator 30 as armature current (driving current).
  • armature current driving current
  • magnetic flux is generated in the rotor 20 (coil 22).
  • the direction in which the current flows is switched depending on the positional relationship when the commutator segments 31 of the commutator 30 and the brushes 40 are in contact with each other.
  • FIG. 7 is a cross-sectional perspective view showing a configuration of part of the electric motor 1 according to the embodiment.
  • FIG. 8 is a perspective view of the terminal 80 used in the electric motor 1 according to the embodiment, viewed obliquely from above.
  • FIG. 9 is a perspective view of the terminal 80 used in the electric motor 1 according to the embodiment, viewed obliquely from below.
  • FIG. 10A is a top view showing the configuration of terminal 80 according to the embodiment.
  • FIG. 10B is a front view showing the configuration of terminal 80 according to the embodiment.
  • FIG. 10C is a left side view showing the configuration of terminal 80 according to the embodiment.
  • FIG. 10D is a right side view showing the configuration of terminal 80 according to the embodiment.
  • the brush holder 60 is a holding member that holds the brush 40 . As shown in FIG. 3 , the brush holder 60 is also an outer shell member forming the outer shell of the electric motor 1 . The brush holder 60 covers the second bracket 112 from the outside.
  • the brush holder 60 is made of, for example, an insulating resin material.
  • the brush holder 60 is a resin molded product formed by integral molding using a resin material.
  • the resin material forming the brush holder 60 is phenol resin.
  • the resin material forming the brush holder 60 is not limited to this.
  • the brush holder 60 has a brush storage portion 61 in which the brush 40 is stored.
  • the brush housing portion 61 is a concave portion formed in a concave shape.
  • the brush housing portions 61 are formed according to the number of brushes 40 .
  • the brush holder 60 is formed with two brush housings 61 .
  • Each of the two brush housing portions 61 is elongated in a direction orthogonal to the axis C of the rotating shaft 21 (that is, the radial direction of the rotation of the rotating shaft 21), and has a concave rectangular cross-sectional shape. .
  • the brush storage portion 61 stores the brush spring 50 together with the brush 40 . Therefore, the longitudinal length of the brush housing portion 61 is longer than the length of the brush 40 .
  • the brush spring 50 is arranged in the brush housing portion 61 so that the spiral portion 50 a is positioned behind the rear end portion of the brush 40 . In this case, the outer ends of the brush springs 50 are pulled out toward the commutator 30 through below the brushes 40 and fixed to the front bottom of the brush housing 61 .
  • a cover plate 70 is provided to cover the brushes 40 housed in the brush housing portion 61 .
  • the cover plate 70 covers the brushes 40 and the brush springs 50 housed in the brush housing portion 61 .
  • the cover plate 70 also has a function of guiding the spiral portion 50a of the brush spring 50 when the spiral portion 50a moves toward the commutator 30 as the brush 40 wears.
  • the cover plate 70 is formed with a recessed groove into which the upper portion of the spiral portion 50a is fitted. The spiral portion 50a moves while being guided by this groove.
  • the cover plate 70 is made of, for example, a metal plate.
  • the cover plate 70 is arranged to cover the brush housing portion 61 .
  • a terminal 80 is attached to the brush holder 60 .
  • a terminal 80 is a power supply terminal that receives power from an external power supply.
  • a wire 120 is connected to the terminal 80 .
  • Terminal 80 receives power through wire 120 .
  • a capacitor 90 is connected to the terminal 80 .
  • the capacitor 90 is a lead type capacitor (capacitor with leads).
  • Capacitor 90 has a body portion 91 .
  • the capacitor 90 has a pair of leads 92 (first lead, second lead).
  • the body part 91 has a pair of anode and cathode, an electrolyte and a dielectric disposed between the pair of anode and cathode, and an insulating outer shell member covering the pair of anode and cathode, the electrolyte and the dielectric.
  • the pair of leads 92 are lead pins (lead terminals) drawn out from the body portion 91 .
  • the pair of leads 92 are composed of conductive wires such as metal wires.
  • a pair of leads 92 are connected to the anode or cathode of the body portion 91 .
  • the capacitor 90 is a capacitor for noise reduction.
  • a capacitor 90 is connected in parallel between the pair of terminals 80 . That is, one lead 92 of the capacitor 90 is connected to one of the pair of terminals 80 . The other lead 92 of the capacitor 90 is connected to the other of the pair of terminals 80 .
  • the capacitance of the capacitor 90 is, for example, 0.001 ⁇ F. As a result, noise in the frequency band of 30-100 MHz can be effectively reduced.
  • the capacitor 90 preferably has excellent heat resistance.
  • Capacitor 90 is, for example, a ceramic capacitor. Note that the capacitance of the capacitor 90 is not limited to 0.001 ⁇ F, and is set according to the frequency of noise to be reduced. Note that two capacitors 90 are arranged in the electric motor 1 . Therefore, two capacitors 90 are connected in parallel to the pair of terminals 80 .
  • the terminal 80 has a plate-like top plate portion 81 and a plate-like standing plate portion 82 standing upright from the top plate portion 81 .
  • the top plate portion 81 functions as a mounting portion that is mounted on the brush holder 60 .
  • the upright plate portion 82 functions as a lead connection portion to which the lead 92 of the capacitor 90 is connected.
  • the terminal 80 further has a plate-shaped protruding plate portion 83 protruding outward from the top plate portion 81 when viewed from above.
  • the upright plate portion 82 is formed so as to hang down from the outer end portion of the projecting plate portion 83 .
  • the upright plate portion 82 and the projecting plate portion 83 are formed to be bent.
  • the upright plate portion 82 and the projecting plate portion 83 are formed to have an L-shaped cross section.
  • the protruding plate portion 83 protrudes laterally from the side end portion of the top plate portion 81 .
  • the projecting plate portion 83 is an extension portion that extends horizontally from the top plate portion 81 .
  • the protruding plate portion 83 protrudes from each of a pair of opposing side end portions of the top plate portion 81 . That is, a pair of projecting plate portions 83 are provided. The pair of protruding plate portions 83 are provided at positions facing each other with the top plate portion 81 interposed therebetween. Therefore, a pair of standing plate portions 82 are also provided.
  • Each of the upright plate portion 82 and the projecting plate portion 83 is a plate-like body having a constant width.
  • the upright plate portion 82 and the projecting plate portion 83 have the same width. Therefore, the standing plate portion 82 and the protruding plate portion 83 have a shape obtained by bending an elongated plate-like member having a constant width by 90 degrees.
  • An insertion hole 86 through which the lead 92 of the capacitor 90 is inserted is formed in the upright plate portion 82 .
  • a lead 92 of the capacitor 90 is inserted through the insertion hole 86 and electrically connected to the upright plate portion 82 .
  • the upright plate portion 82 functions as a lead connection portion to which the lead 92 of the capacitor 90 is connected.
  • the insertion holes 86 are formed in each of the pair of standing plate portions 82. As shown in FIG. In each upright plate portion 82 , an insertion hole 86 ( 86 a, 86 b ) is formed continuously from the upright plate portion 82 to the projecting plate portion 83 . Specifically, each insertion hole 86 (86a, 86b) is slit-shaped. Each insertion hole 86 ( 86 a , 86 b ) is formed so as to extend over the projecting plate portion 83 from the standing plate portion 82 .
  • each insertion hole 86 (86a, 86b) has a portion (first opening) formed in the standing plate portion 82 and a portion (second opening) formed in the projecting plate portion 83.
  • a portion (first opening) formed in the upright plate portion 82 is a portion that can be seen when the terminal 80 is viewed from the side.
  • a portion (second opening) formed in the projecting plate portion 83 is a portion that can be seen when the terminal 80 is viewed from above.
  • each insertion hole 86 is formed in an L shape along the L-shaped plate portion composed of the standing plate portion 82 and the projecting plate portion 83 .
  • one insertion hole 86a and the other insertion hole 86b have different opening lengths (slit lengths).
  • the pair of insertion holes 86 (86a, 86b) have the same length in the upright portion 82 portion.
  • the lengths of the portions of the pair of projecting plate portions 83 are different from each other.
  • the length of the insertion hole 86a formed in the projecting plate portion 83 is relatively short, and the length of the insertion hole 86b formed in the projecting plate portion 83 is relatively long. Things exist. Therefore, when viewed from above, the pair of insertion holes 86 (86a, 86b) appear to have different lengths.
  • the opening width (slit width) of the insertion holes 86 (86a, 86b) is constant.
  • the lead 92 inserted into the insertion hole 86a can be used as a positioning member. Therefore, workability can be improved.
  • the insertion hole 86a forms an opening that extends from the projecting plate portion 83 to the standing plate portion 82 in a slightly oblique direction. Therefore, one lead 92a can be easily inserted into the insertion hole 86a.
  • the rear surface of the protruding plate portion 83 also acts to promote positioning of one lead 92a inserted into the insertion hole 86a.
  • the insertion hole 86b has an opening in the projecting plate portion 83 that is longer than the insertion hole 86a.
  • the insertion hole 86a functions as a fulcrum for the inserted lead 92a. Therefore, the mounting position of the capacitor 90 having the insertion hole 86a as a fulcrum is easily determined.
  • the insertion hole 86b has a long opening with respect to the projecting plate portion 83. As shown in FIG.
  • the insertion hole 86b is longer than the projecting plate portion 83. Since it has an opening, the other lead 92b can be easily inserted.
  • the work of fixing the pair of leads 92 inserted into the pair of insertion holes 86 is performed. Specifically, while one lead 92a inserted into the insertion hole 86a is positioned, the other lead 92b inserted into the insertion hole 86b is soldered or crimped, or both soldered and crimped. Perform fixing work such as
  • the opening portion of the insertion hole 86a which is shorter than the insertion hole 86b, and the back surface portion of the projecting plate portion 83 act to hold one lead 92a. Therefore, one lead 92a is appropriately held in the insertion hole 86a.
  • the fixing work can be performed accurately and easily.
  • the fixing work on the insertion hole 86b side is completed. If the fixing work is performed in this order, it is possible to prevent the lead 92 from floating. Therefore, the fixing work can be efficiently performed.
  • This configuration can be expected to have a more pronounced effect particularly in the case of a lightweight electronic component such as the leaded capacitor described in the present embodiment.
  • the terminal 80 further has a pair of plate-like leg plate portions 84 .
  • a pair of leg plate portions 84 are formed so as to hang down from a pair of side end portions of the top plate portion 81 . That is, the pair of leg plate portions 84 are formed so as to be bent from the side end portions of the top plate portion 81 .
  • the pair of leg plate portions 84 function as fixing portions for fixing the terminal 80 to the brush holder 60 .
  • the pair of leg plate portions 84 are longer than the pair of standing plate portions 82 .
  • the terminal 80 has a pair of clamping plate portions 85 that clamp the core wire of the electric wire 120 . Therefore, the pair of clamping plate portions 85 function as wire connection portions to which the wires 120 are connected.
  • the pair of clamping plate portions 85 has a quick coupling structure. By inserting the electric wire 120 between the pair of clamping plate portions 85 , the electric wire 120 is clamped and fixed between the pair of clamping plate portions 85 . Thereby, the electric wire 120 and the terminal 80 are electrically connected. By providing a barb on the terminal connected to the electric wire 120, the fitting with the pair of clamping plate portions 85 can be reinforced.
  • One of the pair of holding plate portions 85 is formed by cutting and raising a portion of the top plate portion 81 on the back side of the top plate portion 81 .
  • the other of the pair of holding plate portions 85 is formed by bending the rear end portion of the top plate portion 81 toward the back side of the top plate portion 81 .
  • the terminal 80 is a conductive plate made of a conductive material such as a metal material.
  • terminal 80 is made of a copper alloy.
  • the terminal 80 is made of a metal plate with a constant thickness.
  • the terminal 80 is formed into a predetermined shape by bending a single metal plate. Therefore, the top plate portion 81, the standing plate portion 82, the protruding plate portion 83, the leg plate portion 84, and the clamping plate portion 85 are an integral body made of a metal plate having a uniform thickness.
  • the thickness of the metal plate forming the terminal 80 is, for example, 2 mm or less.
  • the thickness of the metal plate forming terminal 80 is 0.6 mm in this embodiment.
  • the brush holder 60 has a capacitor storage portion 62 (first capacitor storage portion, second capacitor storage portion) in which a capacitor 90 (first capacitor, second capacitor) is stored. .
  • the body portion 91 of the capacitor 90 is housed in the capacitor housing portion 62 .
  • the capacitor housing portion 62 is an arrangement space in which the capacitor 90 is arranged.
  • the capacitor housing portion 62 is a recess formed in a concave shape.
  • the brush holder 60 is formed with two capacitor storage portions 62 (a first capacitor storage portion and a second capacitor storage portion).
  • the two capacitors 90 (first capacitor, second capacitor) are arranged separately in two capacitor storage portions 62, respectively. Specifically, one body portion 91 of the two capacitors 90 is housed in one of the two capacitor housing portions 62 . The other body portion 91 of the two capacitors 90 is housed in the other of the two capacitor housing portions 62 .
  • the brush holder 60 has a terminal placement portion 63 in which the terminals 80 are placed.
  • Terminal placement portion 63 includes a placement surface on which top plate portion 81 of terminal 80 is placed. Specifically, the top plate portion 81 of the terminal 80 is placed in surface contact with the placement surface of the terminal placement portion 63 .
  • two terminals 80 a first terminal and a second terminal
  • the brush holder 60 is provided with two terminal placement portions 63 .
  • the two terminal placement portions 63 are provided at positions sandwiching the two capacitor storage portions 62 . Therefore, the capacitor housing portion 62 and the body portion 91 of the capacitor 90 housed in the capacitor housing portion 62 are positioned between the two terminal placement portions 63 .
  • the body portion 91 of the capacitor 90 housed in the capacitor housing portion 62 is positioned between the arrangement surface of the terminal placement portion 63 and the bottom surface of the capacitor housing portion 62 in the direction of the axis C of the rotating shaft 21 . Therefore, the body portion 91 of the capacitor 90 is positioned below the top plate portion 81 arranged in the terminal placement portion 63 .
  • Each terminal placement portion 63 is formed with an insertion hole 63a into which the leg plate portion 84 of the terminal 80 is inserted.
  • Two insertion holes 63 a are formed corresponding to the pair of leg plate portions 84 .
  • the leg plate portion 84 of the terminal 80 is fixed by being press-fitted into the insertion hole 63a.
  • the brush holder 60 has a step recess 64 that is formed to have a step with respect to the placement surface of the terminal placement portion 63 .
  • the bottom surface of the step recess 64 is positioned one step lower than the arrangement surface of the terminal arrangement portion 63 .
  • the bottom surface of the step recess 64 is located on the terminal placement portion 63 side (upper side) than the bottom surface of the capacitor housing portion 62 .
  • the standing plate portion 82 located inside extends toward the bottom surface of the step recess 64 .
  • a gap is formed between the inner upright plate portion 82 and the inner surface of the step recess 64 .
  • the inner upright plate portion 82 and the inner surface of the step recess 64 are not in contact with each other.
  • the inner upright plate portion 82 and the bottom surface of the step recess 64 may or may not be in contact with each other.
  • the standing plate portion 82 located on the outer side is inserted into the insertion hole 63 b formed in the brush holder 60 .
  • the outer upright plate portion 82 and the inner surface and the bottom surface of the insertion hole 63b may or may not be in contact with each other.
  • a wire insertion hole 65 through which the wire 120 is inserted is formed below the terminal placement portion 63 .
  • the wire insertion hole 65 extends in a direction perpendicular to the axis C of the rotating shaft 21 .
  • the electric wire 120 is inserted through the wire insertion hole 65 and held between the pair of holding plate portions 85 of the terminal 80 .
  • FIG. 11 is a cross-sectional view of a connection structure between terminals 80 and capacitors 90 in electric motor 1 according to the embodiment.
  • FIG. 12 is a side sectional view of a connection structure between terminals 80 and capacitors 90 in electric motor 1 according to the embodiment.
  • two capacitors 90 are arranged between a pair of terminals 80.
  • a pair of leads 92 (first lead, second lead) are bent toward a pair of terminals 80 .
  • one of the pair of leads 92 is connected to one of the pair of terminals 80 .
  • the other of the pair of leads 92 is connected to the other of the pair of terminals 80 . Therefore, the pair of leads 92 in each capacitor 90 are bent away from each other.
  • the pair of leads 92 of each capacitor 90 are connected to the inner upright plate portion 82 of the pair of upright plate portions 82 of each terminal 80 .
  • the pair of leads 92 of each capacitor 90 are inserted through insertion holes 86 formed in a standing plate portion 82 erected with respect to the top plate portion 81 . Therefore, the pair of leads 92 extend not in the direction of the axis C of the rotating shaft 21 (longitudinal direction) but in the direction perpendicular to the direction of the axis C of the rotating shaft 21 (lateral direction). In other words, the pair of leads 92 extends in a direction substantially parallel to the main surface of the top plate portion 81 as a whole.
  • leads 92 of two capacitors 90 are inserted through one insertion hole 86 .
  • the leads 92 of the two capacitors 90 are arranged one above the other in the vertical direction (in the direction of the axis C of the rotating shaft 21) in one insertion hole 86. As shown in FIG.
  • the opening width (slit width) of the insertion hole 86 is at least 1 time and less than 2 times the line width of the lead 92 of the capacitor 90 .
  • the opening width of the insertion hole 86 is equivalent to the line width of the lead 92 .
  • the lead 92 of the capacitor 90 inserted through the insertion hole 86 is joined to the upright plate portion 82 of the terminal 80 . Thereby, the lead 92 can be fixed to the upright portion 82 . As shown in FIG. 11, the lead 92 and the upright portion 82 are joined by a conductive adhesive 130 such as solder.
  • the lead 92 and the upright portion 82 may be joined together by caulking instead of being joined with the conductive adhesive 130, or may be joined with the conductive adhesive 130 after caulking. good.
  • FIG. 13A is a diagram showing how the terminal 80 is attached to the brush holder 60.
  • FIG. 13B is a diagram showing a state after the terminal 80 is attached to the brush holder 60.
  • FIG. 13C is a diagram showing how the first capacitor 90 is arranged in the brush holder 60.
  • FIG. 13D is a diagram showing how the body portion 91 of the first capacitor 90 is housed in the capacitor housing portion 62 of the brush holder 60 .
  • FIG. 13E is a diagram showing a state after the body portion 91 of the first capacitor 90 is housed in the capacitor housing portion 62 of the brush holder 60.
  • FIG. 13F shows the state after connecting the second capacitor 90 to the terminal 80.
  • two terminals 80 are attached to the brush holder 60 .
  • each terminal 80 is placed on the terminal placement portion 63 of the brush holder 60 .
  • the pair of upright plate portions 82 of the terminal 80 are inserted into the insertion hole 63b and the step recess 64, and the pair of leg plate portions 84 of the terminal 80 are inserted into the pair of insertion holes 63a.
  • the pair of leg plate portions 84 of the terminal 80 are press-fitted into the pair of insertion holes 63a.
  • the terminal 80 can be fixed to the brush holder 60 in the state shown in FIG. 13B.
  • the capacitor 90 is placed in the brush holder 60. Specifically, the capacitor 90 is connected to the pair of terminals 80 and arranged in the brush holder 60 . In this embodiment, two capacitors 90 are arranged.
  • a pair of pre-bent leads 92 are inserted into the insertion holes 86 of the pair of terminals 80, respectively.
  • the insertion hole 86 is not formed only in the upright plate portion 82 but is formed continuously from the top plate portion 81 to the protruding plate portion 83 that protrudes in the horizontal direction. In other words, the insertion hole 86 is visible in a top view and is open upward. Therefore, by moving the capacitor 90 downward, the pair of leads 92 of the capacitor 90 can be inserted into the insertion holes 86 of the pair of terminals 80 from above, respectively.
  • the body portion 91 of the capacitor 90 is rotated with the portion as a fulcrum. Specifically, the body portion 91 is rotated outward (front side in FIG. 13D).
  • the body portion 91 of the capacitor 90 can be housed in the capacitor housing portion 62 of the brush holder 60 .
  • the body portion 91 of the capacitor 90 is housed in the outer (front side) capacitor housing portion 62 of the two capacitor housing portions 62 . In this manner, the first capacitor 90 can be connected to the pair of terminals 80 and set in the brush holder 60 .
  • the second capacitor 90 is connected to the pair of terminals 80 and set in the brush holder 60 in the same manner as the first capacitor 90 .
  • the lead 92 of the second capacitor 90 is inserted through the insertion hole 86 through which the lead 92 of the first capacitor 90 is inserted. pile up.
  • the body portion 91 of the second capacitor 90 is divided into two capacitor storage portions 62 and arranged. Therefore, when housing the body portion 91 of the second capacitor 90 in the capacitor housing portion 62, the body portion 91 of the second capacitor 90 is placed in the opposite direction to the body portion 91 of the first capacitor 90 (Fig. 13F back side). As a result, the body portion 91 of the second capacitor 90 is accommodated in the inner (back side) capacitor accommodating portion 62 of the two capacitor accommodating portions 62 .
  • the leads 92 of the two capacitors 90 inserted through the insertion holes 86 of the terminals 80 and the upright portions 82 of the terminals 80 are bonded with the conductive adhesive 130.
  • solder is used as the conductive adhesive 130 .
  • the two leads 92 inserted through the pair of insertion holes 86 and the upright plate portion 82 are joined by soldering, and the two capacitors 90 are fixed to the pair of terminals 80. be.
  • solder fillets are formed in each upright plate portion 82 .
  • the upright plate portion 82 is positioned on the side of the top plate portion 81 . Therefore, the molten solder is applied laterally.
  • a solder fillet is formed horizontally as shown in FIG. Specifically, the solder fillet is formed on the outer surface of the upright plate portion 82 .
  • the solder may pass through the insertion hole 86 and reach the inner surface of the upright plate portion 82 .
  • a back fillet may also be formed inside the upright plate portion 82 .
  • the molten solder may drip onto the brush holder 60 .
  • the brush holder 60 is made of phenolic resin, which is a highly heat-resistant resin, even if melted solder drips onto the brush holder 60, the solder does not melt the brush holder 60.
  • the lead 92 and the upright plate portion 82 are bonded only with the conductive adhesive 130, the lead 92 and the upright plate portion 82 are not bonded together before the lead 92 and the upright plate portion 82 are bonded with the conductive adhesive 130. 82 may be crimped. By joining the lead 92 and the upright plate portion 82 with both the caulking and the conductive adhesive 130 in this way, the bondability between the capacitor 90 and the terminal 80 can be improved.
  • the terminal 80 to which the capacitor 90 is connected has the top plate portion 81 and the standing plate portion 82 erected with respect to the top plate portion 81 . ing. An insertion hole 86 through which the lead 92 of the capacitor 90 is inserted is formed in the upright plate portion 82 .
  • This configuration allows the leads 92 of the capacitor 90 to extend laterally rather than vertically. That is, the lead 92 of the capacitor 90 can be extended in a direction orthogonal to the axis C of the rotation shaft 21 instead of in the direction of the axis C of the rotation shaft 21 . As a result, even if the capacitor 90, which is a component with leads, is housed inside, it is possible to prevent the height (thickness) of the electric motor 1 from increasing. Therefore, the electric motor 1 can be made thinner.
  • the fillet of the conductive adhesive 130 is formed horizontally instead of vertically. Therefore, it is possible to prevent the height of the electric motor 1 from increasing due to the fillet.
  • the thickness of the motor can be reduced. can be planned. In other words, it is possible to achieve both EMC countermeasures and thinning.
  • the electric motor 1 according to the present embodiment is coreless, the inductance is low. Therefore, it is possible to realize a thin electric motor 1 having low inductance and high robustness against EMC, in which the capacity of the capacitor 90 can be selected according to the noise to be reduced.
  • the electric motor 1 includes a commutator, a brush 40 in contact with the commutator, a brush holder 60 that holds the brush 40 and has a capacitor storage portion 62 , and a brush holder 60 that is electrically connected to the brush 40 .
  • a body portion 91 housed in the capacitor housing portion 62; and leads 92 drawn out from the body portion 91.
  • the terminal 80 has a top plate portion 81 and an upright plate portion 82 erected with respect to the top plate portion 81 .
  • An insertion hole 86 through which the lead 92 is inserted is formed in the upright plate portion 82 .
  • the terminal 80 has a protruding plate portion 83 that protrudes outward from the top plate portion 81 when viewed from above, and the upright plate portion 82 has the protruding plate portion 83 depending from the outer end of the
  • the insertion hole 86 of the terminal 80 is formed continuously from the upright plate portion 82 to the projecting plate portion 83 .
  • the leads 92 of the capacitor 90 can be inserted through the insertion holes 86 simply by moving the capacitor 90 toward the top plate portion 81 (downward). Therefore, capacitor 90 can be easily connected to terminal 80 .
  • the brush holder 60 has the terminal placement portion 63 including the placement surface on which the top plate portion 81 is placed.
  • the body portion 91 of the capacitor 90 is positioned between the arrangement surface of the terminal placement portion 63 and the bottom surface of the capacitor housing portion 62 in which the body portion 91 of the capacitor 90 is housed.
  • the main body portion 91 of the capacitor 90 is positioned below the top plate portion 81 of the terminal 80, so mounting the capacitor 90 effectively reduces the height of the electric motor 1. can be suppressed.
  • the connecting portion between the lead 92 of the capacitor 90 and the terminal 80 is also positioned below the top plate portion 81 .
  • the electric motor 1 has a structure in which the leads 92 and the terminals 80 are joined under the top plate portion 81 . As a result, it is possible to effectively prevent the height of the electric motor 1 from increasing due to the joint structure between the leads 92 of the capacitor 90 and the terminals 80 .
  • the brush holder 60 has a step recess 64 formed to have a step with respect to the placement surface of the terminal placement portion 63 .
  • the upright plate portion 82 of the terminal 80 extends toward the bottom surface of the step recess 64 .
  • the leads 92 of the capacitor 90 can be easily inserted through the insertion holes 86 present in the upright plate portion 82 .
  • a gap is formed between the upright plate portion 82 of the terminal 80 and the inner surface of the stepped recess portion 64 of the brush holder 60 .
  • the lead 92 of the capacitor 90 when the lead 92 of the capacitor 90 is inserted through the insertion hole 86 existing in the upright plate portion 82 , the lead 92 is inserted through the insertion hole 86 in the gap between the upright plate portion 82 and the inner side surface of the step recess 64 .
  • the tip of the lead 92 can be arranged. Therefore, even if the lead 92 extends laterally and is inserted through the insertion hole 86, the leading end of the lead 92 can be prevented from becoming an obstacle.
  • the electric motor 1 has two terminals 80
  • the capacitor 90 has two leads 92
  • one of the two leads 92 is one of the two terminals 80
  • the other of the two leads 92 is connected to the other of the two terminals 80 .
  • the capacitor 90 can be connected in parallel to the two terminals 80 . Therefore, the capacitor 90 can effectively reduce noise.
  • the electric motor 1 has two capacitors 90 , and the lead 92 of each of the two capacitors 90 is inserted through the insertion hole 86 of the terminal 80 .
  • the two capacitors 90 can reduce noise more effectively.
  • the leads 92 of each of the two capacitors 90 are inserted through one insertion hole 86 . Therefore, even if two capacitors 90 are used, the connection between the terminals 80 and the leads 92 of the two capacitors 90 can be performed in the same manner as the connection between the leads 92 of one capacitor 90 and the terminals 80. .
  • the brush holder 60 has at least two capacitor storage portions 62 .
  • One body portion 91 of the two capacitors 90 is housed in one of the two capacitor housing portions 62 .
  • the other body portion 91 of the two capacitors 90 is housed in the other of the two capacitor housing portions 62 .
  • the two capacitors 90 can be divided and arranged in the two capacitor housing portions 62 . Therefore, even if two capacitors 90 are used, it is possible to prevent the height of electric motor 1 from increasing.
  • the two capacitors 90 are arranged separately in the two capacitor storage portions 62 in the brush holder 60 .
  • the two capacitors 90 may be arranged in only one of the two capacitor storage portions 62 in the brush holder 60, as in the electric motor 1A shown in FIG.
  • FIG. 14 is a perspective view showing a configuration of a brush holder 60 to which various parts are attached in an electric motor 1A according to Modification 1.
  • the body portion 91 of each of the two capacitors 90 may be housed in one capacitor housing portion 62 .
  • FIG. FIG. 15 is a perspective view showing the configuration of a brush holder 60 to which various parts are attached in an electric motor 1B according to Modification 2.
  • FIG. 16 is a cross-sectional view of an electric motor 1B according to Modification 2.
  • one capacitor 90 is housed in one of the two capacitor housing portions 62 in the brush holder 60.
  • three or more capacitors 90 may be connected in parallel between the pair of terminals 80 .
  • FIG. 17 is an enlarged cross-sectional view of an electric motor according to Modification 3.
  • FIG. 18 when there is only one capacitor 90, the sealing agent 140 may be formed only in the capacitor accommodating portion 62 in which the body portion 91 is accommodated.
  • FIG. 18 is an enlarged cross-sectional view of an electric motor according to Modification 4.
  • the sealant 140 may be formed only in the capacitor housing portion 62 housing the two body portions 91. As a result, the two main body portions 91 can be covered with the sealant 140 by applying the sealant 140 once.
  • the sealant 140 is made of, for example, an insulating resin material whose main component is a resin material such as silicone.
  • the sealing agent 140 can be formed by applying a liquid insulating resin material to the capacitor housing portion 62 and solidifying it. Note that the sealing agent 140 may be filled in the capacitor accommodating portion 62 so that the entire body portion 91 is embedded.
  • the leads 92 of the two capacitors 90 are stacked vertically in the insertion holes 86 of the upright plate portions 82 of the terminals 80 .
  • the leads 92 of the two capacitors 90 may be arranged side by side in the insertion hole 86 .
  • the opening width of the insertion hole 86 is at least twice the line width of the lead 92 .
  • the electric motor 1 has only one bearing 100 .
  • the electric motor 1 may have two bearings.
  • one of the two bearings can be attached to the first end 21 a of the rotating shaft 21 and one of the two bearings can be attached to the second end 21 b of the rotating shaft 21 .
  • the electric motor 1 is a coreless motor in which the stator 10 and the rotor 20 do not have cores.
  • the electric motor 1 may be an electric motor in which the stator 10 and the rotor 20 have cores.
  • the stator 10 is composed only of permanent magnets.
  • the stator 10 may be a stator composed of permanent magnets and an iron core, or an armature composed of stator windings and an iron core without using permanent magnets.
  • the electric motor 1 is a flat motor with an outer shape whose thickness is smaller than its outer diameter.
  • the technology of the present disclosure can also be applied to, for example, a cylindrical electric motor having a cylindrical housing with an outer size whose thickness is greater than its outer diameter.
  • the direction of the main magnetic flux generated by the stator 10 and the rotor 20 is the direction of the axis C of the rotating shaft 21 .
  • the direction of the main magnetic flux generated by the stator 10 and the rotor 20 may be a direction orthogonal to the axial center C direction of the rotating shaft 21 (radial direction of rotation of the rotating shaft 21).
  • the technology of the present disclosure can also be applied to an inner rotor type motor in which the rotor 20 is arranged inside the stator 10 .
  • the electric motor 1 is a vehicle motor used in a vehicle. However, it is not limited to this.
  • the technology of the present disclosure can also be applied to electric motors used in various other electric devices, such as electric motors used in electric blowers and the like mounted on electric vacuum cleaners and the like.
  • the terminal 80 has been described as a component to which the capacitor 90 is connected. However, it is not limited to this. That is, the terminal 80 may be used as a component to which an electronic component with leads other than the capacitor 90 is connected. In this case, the leads of the leaded electronic component are inserted through the insertion holes 86 of the upright plate portion 82 of the terminal 80 .
  • the technology of the present disclosure can be widely used in various products equipped with electric motors, including products in the field of electric equipment such as automobiles and the field of household electric appliances.
  • Reference Signs List 1 1A, 1B Electric motor 10 Stator 20 Rotor 21 Rotating shaft 21a First end 21b Second end 22 Coil 23 Molded resin 30 Commutator 31 Commutator piece 40 Brush 50 Brush spring 50a Spiral part 60 Brush holder 61 Brush housing Part 62 capacitor storage part (first capacitor storage part, second capacitor storage part) 63 Terminal placement portion 63a, 63b Insertion hole 64 Step recess 65 Wire insertion hole 70 Cover plate 80 Terminal (first terminal, second terminal) 81 Top plate portion 82 Standing plate portion 83 Protruding plate portion 84 Leg plate portion 85 Clamping plate portion 86, 86a, 86b Insertion hole 90 Capacitor (first capacitor, second capacitor) 91 main body 92, 92a, 92b leads (first lead, second lead) Reference Signs List 100 bearing 111 first bracket 112 second bracket 120 electric wire 130 conductive adhesive 140 sealant

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  • Motor Or Generator Frames (AREA)

Abstract

This electric motor comprises: a commutator; a brush that makes contact with the commutator; a brush holder that holds the brush and has a capacitor housing portion; a terminal that is electrically connected to the brush; and a capacitor having a body portion that is housed in the capacitor housing portion and a lead that is pulled out from the body portion. The terminal has a top plate portion and a standing plate portion that is installed in a standing manner with respect to the top plate portion. The standing plate portion is formed with an insertion hole through which the lead is inserted.

Description

電動機及び端子motor and terminal
　本開示は、電動機及び電動機等の電気機器に用いられる端子に関する。 The present disclosure relates to terminals used in electric motors and electrical equipment such as electric motors.
　電動機は、電気掃除機等の家庭用電気機器分野をはじめとして、自動車等の電装分野等にも広く用いられている。例えば、電気掃除機に搭載される電動送風機には、回転ファンを回転させるために電動機が用いられている。二輪又は四輪の車両には、ラジエータ等の冷却ファンを駆動するために電動機が用いられている。 Electric motors are widely used not only in the field of household electric appliances such as vacuum cleaners, but also in the field of electrical components such as automobiles. For example, an electric blower mounted on a vacuum cleaner uses an electric motor to rotate a rotary fan. Electric motors are used in two-wheeled or four-wheeled vehicles to drive cooling fans such as radiators.
　電動機としては、ブラシを用いるブラシ付き電動機、及び、ブラシを用いないブラシレス電動機が知られている。このうち、ブラシ付き電動機は、固定子と、固定子の磁力によって回転する回転子と、回転子が有する回転軸に取り付けられた整流子と、整流子に摺接するブラシとを備える。ブラシには、ブラシホルダ等に取り付けられた一対の電源端子（例えば直流電源に接続されるプラス端子とマイナス端子）を介して外部電源から電力が供給される。 As electric motors, brushed electric motors that use brushes and brushless electric motors that do not use brushes are known. Among them, the brushed electric motor includes a stator, a rotor rotated by the magnetic force of the stator, a commutator attached to a rotating shaft of the rotor, and brushes in sliding contact with the commutator. Electric power is supplied to the brush from an external power source through a pair of power supply terminals (for example, a positive terminal and a negative terminal connected to a DC power supply) attached to a brush holder or the like.
　電動機については、電動機から発生するノイズを抑制することが要求される場合がある。例えば、車両におけるラジエータの冷却ファンに用いられる電動機については、所定の周波数のノイズを低減することが要求される。例えば、車両用の電動機では、３０～２００ＭＨｚ帯（ＣＩＳＰＲ２５　ＡＬＳＥ（ａｂｓｏｒｂｅｒ－ｌｉｎｅｄ　ｓｈｉｅｌｄｅｄ　ｅｎｃｌｏｓｕｒｅ）　電雑ノイズ帯）の電磁ノイズを低減することが要求されている。 For electric motors, it may be required to suppress the noise generated from the electric motor. For example, an electric motor used for a cooling fan for a radiator in a vehicle is required to reduce noise of a predetermined frequency. For example, electric motors for vehicles are required to reduce electromagnetic noise in the 30 to 200 MHz band (CISPR25 ALSE (absorber-lined shielded enclosure) noise band).
　この場合、ブラシ付き電動機では、ノイズの発生源となるブラシと整流子との間のスパークを低減したり、ブラケット等を金属製にして金属でノイズを遮蔽したりすることで、ノイズを抑制している。 In this case, in brushed motors, noise can be suppressed by reducing the spark between the brush and commutator, which is the source of noise, or by shielding the noise with a metal bracket or the like. ing.
　一対の電源端子間にコンデンサを並列接続することによってノイズを抑制する技術も提案されている（例えば、特許文献１を参照）。この場合、コンデンサは、例えば、電動機の筐体内に配置される回路基板に実装する等して電動機の内部に収納される。 A technique for suppressing noise by connecting a capacitor in parallel between a pair of power supply terminals has also been proposed (see Patent Document 1, for example). In this case, the capacitor is housed inside the electric motor, for example, by being mounted on a circuit board arranged inside the housing of the electric motor.
　近年、電動機の薄型化が要望されている。特に、車両におけるラジエータの冷却ファンに用いられる電動機については、狭いスペースに搭載できるように全体として薄くすることが求められている。 In recent years, there has been a demand for thinner motors. In particular, electric motors used in cooling fans for radiators in vehicles are required to be thin as a whole so that they can be mounted in a narrow space.
　このため、ノイズ低減用のコンデンサを配置しようとしても、構造上、電動機の内部にコンデンサを配置することが難しくなっている。特に、電動機が扁平型で電動機の外径が１００ｍｍ以下になると、電動機内のスペースが狭くなり、電動機の内部にコンデンサを収納することが難しい。 Therefore, even if you try to place a capacitor for noise reduction, it is difficult to place the capacitor inside the motor due to its structure. In particular, when the motor is flat and has an outer diameter of 100 mm or less, the space inside the motor becomes narrow, making it difficult to accommodate the capacitor inside the motor.
特開２０１８－１９８４７５号公報JP 2018-198475 A
　本開示は、このような問題を解決するためになされたものである。本開示は、コンデンサ等のリード付き電子部品を内部に収納したとしても薄型化することができる電動機及び端子を提供することを目的とする。 This disclosure was made to solve such problems. An object of the present disclosure is to provide an electric motor and a terminal that can be made thinner even if an electronic component with leads such as a capacitor is housed inside.
　上記目的を達成するために、本開示に係る電動機の一態様は、整流子と、前記整流子に接するブラシと、前記ブラシを保持するとともに、コンデンサ収納部を有するブラシホルダと、前記ブラシに電気的に接続された端子と、前記コンデンサ収納部に収納される本体部と、前記本体部から引き出されたリードと、を有するコンデンサと、を備え、前記端子は、天板部と、前記天板部に対して立設する立板部とを有し、前記立板部には、前記リードが挿通される挿通孔が形成されている。 In order to achieve the above object, one aspect of the electric motor according to the present disclosure includes a commutator, a brush in contact with the commutator, a brush holder that holds the brush and has a capacitor storage portion, and an electric motor for the brush. a capacitor having terminals connected to each other, a main body portion housed in the capacitor housing portion, and leads drawn out from the main body portion, wherein the terminals include a top plate portion and the top plate. and an upright plate portion erected with respect to the portion, and an insertion hole through which the lead is inserted is formed in the upright plate portion.
　また、本開示に係る端子の一態様は、天板部と、前記天板部に対して立設する立板部と、を有し、前記立板部には、リード付き電子部品のリードが挿通される挿通孔が形成されている。 Further, one aspect of the terminal according to the present disclosure includes a top plate portion and a standing plate portion erected with respect to the top plate portion, and the leads of an electronic component with leads are attached to the standing plate portion. An insertion hole is formed for insertion.
　本開示によれば、コンデンサ等のリード付き電子部品を内部に収納したとしても薄型化することができる電動機を実現することができる。 According to the present disclosure, it is possible to realize an electric motor that can be made thinner even if electronic components with leads such as capacitors are housed inside.
図１は、実施の形態に係る電動機を斜め上方から見たときの外観斜視図である。FIG. 1 is an external perspective view of the electric motor according to the embodiment when viewed obliquely from above. 図２は、実施の形態に係る電動機を斜め下方から見たときの外観斜視図である。FIG. 2 is an external perspective view of the electric motor according to the embodiment when viewed obliquely from below. 図３は、実施の形態に係る電動機を一の面で切断したときの断面図である。FIG. 3 is a cross-sectional view of the electric motor according to the embodiment, taken along one plane. 図４は、実施の形態に係る電動機を他の面で切断したときの断面図である。FIG. 4 is a cross-sectional view when the electric motor according to the embodiment is cut along another plane. 図５は、実施の形態に係る電動機において、各種部品が取り付けられたブラシホルダの構成を示す斜視図である。FIG. 5 is a perspective view showing the configuration of a brush holder to which various parts are attached in the electric motor according to the embodiment. 図６は、図５に示される各種部品及びブラシホルダの分解斜視図である。6 is an exploded perspective view of the various components and brush holder shown in FIG. 5; FIG. 図７は、実施の形態に係る電動機の一部の構成を示す断面斜視図である。FIG. 7 is a cross-sectional perspective view showing a configuration of part of the electric motor according to the embodiment. 図８は、実施の形態に係る電動機に用いられる端子を斜め上方から見たときの斜視図である。FIG. 8 is a perspective view of a terminal used in the electric motor according to the embodiment, viewed obliquely from above. 図９は、実施の形態に係る電動機に用いられる端子を斜め下方から見たときの斜視図である。FIG. 9 is a perspective view of a terminal used in the electric motor according to the embodiment, viewed obliquely from below. 図１０Ａは、実施の形態に係る端子の構成を示す上面図である。10A is a top view showing a configuration of a terminal according to the embodiment; FIG. 図１０Ｂは、実施の形態に係る端子の構成を示す正面図である。10B is a front view showing the configuration of the terminal according to the embodiment; FIG. 図１０Ｃは、実施の形態に係る端子の構成を示す左側面図である。10C is a left side view showing the configuration of the terminal according to the embodiment; FIG. 図１０Ｄは、実施の形態に係る端子の構成を示す右側面図である。10D is a right side view showing the configuration of the terminal according to the embodiment; FIG. 図１１は、実施の形態に係る電動機における端子とコンデンサとの接続構造の断面図である。FIG. 11 is a cross-sectional view of a connection structure between terminals and capacitors in the electric motor according to the embodiment. 図１２は、実施の形態に係る電動機における端子とコンデンサとの接続構造の側断面図である。FIG. 12 is a side cross-sectional view of a connection structure between terminals and capacitors in the electric motor according to the embodiment. 図１３Ａは、端子をブラシホルダに取り付けるときの様子を示す図である。FIG. 13A is a diagram showing how the terminals are attached to the brush holder. 図１３Ｂは、端子をブラシホルダに取り付けた後の状態を示す図である。FIG. 13B is a diagram showing a state after the terminals are attached to the brush holder. 図１３Ｃは、１つ目のコンデンサをブラシホルダに配置するときの様子を示す図である。FIG. 13C is a diagram showing how the first capacitor is arranged in the brush holder. 図１３Ｄは、１つ目のコンデンサの本体部をブラシホルダのコンデンサ収納部に収納するときの様子を示す図である。FIG. 13D is a diagram showing how the main body of the first capacitor is housed in the capacitor housing portion of the brush holder. 図１３Ｅは、１つ目のコンデンサの本体部をブラシホルダのコンデンサ収納部に収納した後の状態を示す図である。FIG. 13E is a diagram showing a state after the body portion of the first capacitor is housed in the capacitor housing portion of the brush holder. 図１３Ｆは、２つ目のコンデンサを端子に接続した後の状態を示す図である。FIG. 13F shows the state after connecting the second capacitor to the terminals. 図１４は、変形例１に係る電動機において、各種部品が取り付けられたブラシホルダの構成を示す斜視図である。14 is a perspective view showing a configuration of a brush holder to which various parts are attached in the electric motor according to Modification 1. FIG. 図１５は、変形例２に係る電動機において、各種部品が取り付けられたブラシホルダの構成を示す斜視図である。FIG. 15 is a perspective view showing a configuration of a brush holder to which various parts are attached in an electric motor according to Modification 2. FIG. 図１６は、変形例２に係る電動機の断面図である。16 is a cross-sectional view of an electric motor according to Modification 2. FIG. 図１７は、変形例３に係る電動機の拡大断面図である。FIG. 17 is an enlarged cross-sectional view of an electric motor according to Modification 3. FIG. 図１８は、変形例４に係る電動機の拡大断面図である。FIG. 18 is an enlarged cross-sectional view of an electric motor according to Modification 4. FIG.
　以下、本開示の実施の形態について、図面を参照しながら説明する。なお、以下に説明する実施の形態は、いずれも本開示の一具体例を示すものである。したがって、以下の実施の形態で示される、数値、形状、材料、構成要素、構成要素の配置位置及び接続形態等は、一例であって本開示を限定する主旨ではない。よって、以下の実施の形態における構成要素のうち、本開示の最上位概念を示す独立請求項に記載されていない構成要素については、任意の構成要素として説明される。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be noted that each of the embodiments described below is a specific example of the present disclosure. Therefore, numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are examples and are not intended to limit the present disclosure. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in independent claims representing the highest concept of the present disclosure will be described as optional constituent elements.
　なお、各図は、模式図であり、必ずしも厳密に図示されたものではない。また、各図において、他の図と実質的に同一の構成に対しては同一の符号を付しており、重複する説明は省略又は簡略化する。また、本明細書において、「上」及び「下」という用語は、必ずしも、絶対的な空間認識における上方向（鉛直上方）及び下方向（鉛直下方）を指すものではない。 It should be noted that each figure is a schematic diagram and is not necessarily strictly illustrated. Also, in each figure, the same reference numerals are assigned to substantially the same components as those in other figures, and duplicate descriptions will be omitted or simplified. Also, in this specification, the terms "upper" and "lower" do not necessarily indicate upward (vertically upward) and downward (vertically downward) directions in absolute spatial recognition.
　（実施の形態）
　まず、実施の形態に係る電動機１の構成について、図１～図６を用いて説明する。図１は、実施の形態に係る電動機１を斜め上方から見たときの外観斜視図である。図２は、実施の形態に係る電動機１を斜め下方から見たときの外観斜視図である。図３及び図４は、実施の形態に係る電動機１の断面図である。図３は、回転軸２１の軸心Ｃを通り且つブラシ４０を通る平面で切断したときの断面図である。図４は、回転軸２１の軸心Ｃを通り且つブラシホルダ６０のコンデンサ収納部６２を通る平面で切断したときの断面図である。図５は、実施の形態に係る電動機１において、各種部品が取り付けられたブラシホルダ６０の構成を示す斜視図である。図６は、図５に示される各種部品及びブラシホルダ６０の分解斜視図である。 (Embodiment)
First, the configuration of the electric motor 1 according to the embodiment will be described with reference to FIGS. 1 to 6. FIG. FIG. 1 is an external perspective view of an electric motor 1 according to an embodiment when viewed obliquely from above. FIG. 2 is an external perspective view when the electric motor 1 according to the embodiment is viewed obliquely from below. 3 and 4 are cross-sectional views of the electric motor 1 according to the embodiment. FIG. 3 is a cross-sectional view taken along a plane passing through the axis C of the rotating shaft 21 and passing through the brush 40. As shown in FIG. FIG. 4 is a cross-sectional view taken along a plane passing through the axis C of the rotating shaft 21 and passing through the capacitor housing portion 62 of the brush holder 60. As shown in FIG. FIG. 5 is a perspective view showing the configuration of a brush holder 60 to which various parts are attached in the electric motor 1 according to the embodiment. FIG. 6 is an exploded perspective view of the various components and brush holder 60 shown in FIG.
　図３及び図４に示すように、電動機１は、固定子１０（ステータ）と、固定子１０の磁力により回転する回転子２０（ロータ）とを備える。電動機１は、ブラシ付き電動機である。電動機１は、さらに、回転子２０が有する回転軸２１に取り付けられた整流子３０と、整流子３０に接する少なくとも１つのブラシ４０と、ブラシ４０を整流子３０に押し当てるためのブラシバネ５０と、ブラシ４０を保持するブラシホルダ６０と、ブラシ４０を覆うカバープレート７０とを備える。 As shown in FIGS. 3 and 4, the electric motor 1 includes a stator 10 (stator) and a rotor 20 (rotor) rotated by the magnetic force of the stator 10 . The electric motor 1 is a brushed electric motor. The electric motor 1 further includes a commutator 30 attached to a rotating shaft 21 of the rotor 20, at least one brush 40 in contact with the commutator 30, a brush spring 50 for pressing the brush 40 against the commutator 30, A brush holder 60 holding the brush 40 and a cover plate 70 covering the brush 40 are provided.
　図４～図６に示すように、電動機１は、さらに、ブラシ４０に電気的に接続された端子８０と、端子８０に接続されたコンデンサ９０とを備える。電動機１は、その他に、軸受け１００と、第１ブラケット１１１と、第２ブラケット１１２とを備える。図１及び図２に示すように、電動機１には、電線１２０が接続されている。 As shown in FIGS. 4 to 6, the electric motor 1 further includes terminals 80 electrically connected to the brushes 40 and a capacitor 90 connected to the terminals 80. As shown in FIGS. Electric motor 1 also includes bearing 100 , first bracket 111 , and second bracket 112 . As shown in FIGS. 1 and 2, electric wires 120 are connected to the electric motor 1 .
　電動機１は、直流により駆動する直流電動機（ＤＣモータ）の一種である。電動機１において、固定子１０として磁石が用いられている。電動機１において、回転子２０としてコイル２２を有する電機子が用いられている。電動機１は、二輪又は四輪等の車両に搭載される扁平型（フラット型）のブラシ付きコアレスモータ（フラットモータ）である。したがって、固定子１０及び回転子２０は、コア（鉄心）を有していない。電動機１は、全体として厚みが薄くて軽い構成になっている。具体的には、電動機１は、車両におけるラジエータの冷却ファンに用いられる小型モータである。電動機１の外径（直径）φは、１２０ｍｍ以下である。一例として、電動機１の外径φは、φ６０ｍｍ、φ７０ｍｍ又はφ９０ｍｍ等である。なお、電動機１は、ＤＣ１２Ｖの入力電圧により駆動する。 The electric motor 1 is a type of direct current motor (DC motor) driven by direct current. A magnet is used as the stator 10 in the electric motor 1 . An armature having a coil 22 is used as the rotor 20 in the electric motor 1 . The electric motor 1 is a flat-type brushed coreless motor (flat motor) mounted on a two-wheeled or four-wheeled vehicle. Therefore, the stator 10 and rotor 20 do not have a core (iron core). The electric motor 1 has a thin and light configuration as a whole. Specifically, the electric motor 1 is a small motor used for a radiator cooling fan in a vehicle. The outer diameter (diameter) φ of the electric motor 1 is 120 mm or less. As an example, the outer diameter φ of the electric motor 1 is φ60 mm, φ70 mm, φ90 mm, or the like. The electric motor 1 is driven by an input voltage of DC 12V.
　以下、電動機１の各構成部材について詳細に説明する。 Each component of the electric motor 1 will be described in detail below.
　図３に示すように、固定子１０は、回転子２０との間に微小なエアギャップを介して配置されている。固定子１０は、回転子２０に作用する磁力を発生させる。固定子１０は、回転子２０とのエアギャップ面に磁束を生成する構成になっている。回転子２０は、電機子である固定子１０とともに磁気回路を構成している。具体的には、固定子１０は、全体として実質的にドーナツ状である。固定子１０は、回転軸２１の周方向に沿って回転子２０とのエアギャップ面にＮ極とＳ極とが交互に均等に存在するように構成されている。固定子１０は、トルクを発生するための磁束を作る界磁である。固定子１０は、複数の磁石（マグネット）によって構成されている。固定子１０を構成する磁石は、例えば永久磁石である。固定子１０（磁石）が発生する主磁束の向きは、回転軸２１が延伸する方向に沿った方向である。固定子１０は、第１ブラケット１１１に固定されている。 As shown in FIG. 3, the stator 10 is arranged with a minute air gap between it and the rotor 20 . The stator 10 generates magnetic force acting on the rotor 20 . The stator 10 is configured to generate magnetic flux on the air gap surface with the rotor 20 . The rotor 20 forms a magnetic circuit together with the stator 10, which is an armature. Specifically, the stator 10 as a whole is substantially doughnut-shaped. The stator 10 is configured such that N poles and S poles alternately and evenly exist on the air gap surface with the rotor 20 along the circumferential direction of the rotating shaft 21 . The stator 10 is a magnetic field that creates magnetic flux for generating torque. The stator 10 is composed of a plurality of magnets (magnets). The magnets forming the stator 10 are, for example, permanent magnets. The direction of the main magnetic flux generated by the stator 10 (magnet) is along the direction in which the rotating shaft 21 extends. Stator 10 is fixed to first bracket 111 .
　図３に示すように、回転子２０は、回転軸２１及びコイル２２を有する。また、回転子２０は、コアを有さないコアレス回転子である。 As shown in FIG. 3, the rotor 20 has a rotating shaft 21 and coils 22 . Also, the rotor 20 is a coreless rotor that does not have a core.
　回転子２０は、回転軸２１が延伸する軸心Ｃ方向（単に「軸心方向」ともいう。）を回転中心として回転する。回転子２０は、固定子１０に作用する磁力を発生させる。回転子２０が発生する主磁束の向きは、回転軸２１が延伸する軸心Ｃ方向に沿った方向である。 The rotor 20 rotates around the direction of the axis C along which the rotating shaft 21 extends (also referred to simply as the "axis direction"). Rotor 20 generates a magnetic force acting on stator 10 . The direction of the main magnetic flux generated by the rotor 20 is along the axial center C direction along which the rotating shaft 21 extends.
　回転子２０は、固定子１０と対向して配置されている。回転子２０は、回転軸２１が延伸する軸心Ｃ方向において固定子１０と対向している。具体的には、回転子２０のコイル２２と固定子１０とが回転軸２１が延伸する軸心Ｃ方向に対向している。つまり、コイル２２と固定子１０とは回転軸２１の軸心Ｃの方向に並んでいる。 The rotor 20 is arranged facing the stator 10 . The rotor 20 faces the stator 10 in the axial center C direction along which the rotating shaft 21 extends. Specifically, the coil 22 of the rotor 20 and the stator 10 face each other in the direction of the axis C along which the rotating shaft 21 extends. That is, the coil 22 and the stator 10 are arranged in the direction of the axis C of the rotating shaft 21 .
　回転軸２１は、軸心Ｃを有するシャフトである。回転軸２１は、長尺状の棒状部材である。一例として、回転軸２１は、ＳＵＳ（Ｓｔａｉｎｌｅｓｓ　Ｕｓｅｄ　Ｓｔｅｅｌ）等の金属材料によって構成された金属棒である。回転軸２１が含む軸心Ｃは、回転子２０が回転する際の回転中心となる。回転軸２１の長手方向、すなわち回転軸２１が延伸する方向（延伸方向）は、軸心Ｃ方向である。 The rotating shaft 21 is a shaft having an axis C. The rotating shaft 21 is an elongated rod-shaped member. As an example, the rotating shaft 21 is a metal rod made of a metal material such as SUS (Stainless Used Steel). An axis C included in the rotating shaft 21 is the center of rotation when the rotor 20 rotates. The longitudinal direction of the rotating shaft 21, that is, the direction in which the rotating shaft 21 extends (stretching direction) is the axial center C direction.
　回転軸２１は、軸受け１００によって支持されている。軸受け１００は、１つのみである。つまり、回転軸２１は、１つのみの軸受け１００によって支持されている。軸受け１００は、回転軸２１を回転自在に支持している。回転軸２１は、軸受け１００に圧入されている。軸受け１００は、第１ブラケット１１１に保持されている。具体的には、軸受け１００は、第１ブラケット１１１に設けられた凹部に圧入されて固定されている。一例として、軸受け１００は、玉軸受けである。具体的には、軸受け１００は、深溝玉軸受けである。 The rotating shaft 21 is supported by bearings 100 . There is only one bearing 100 . That is, the rotating shaft 21 is supported by only one bearing 100 . The bearing 100 rotatably supports the rotating shaft 21 . The rotating shaft 21 is press-fitted into the bearing 100 . Bearing 100 is held by first bracket 111 . Specifically, the bearing 100 is press-fitted into a recess provided in the first bracket 111 and fixed. As an example, bearing 100 is a ball bearing. Specifically, bearing 100 is a deep groove ball bearing.
　回転軸２１の第１端部２１ａは、出力側の端部（出力軸）である。回転軸２１の第１端部２１ａは、第１ブラケット１１１及び軸受け１００から突出している。回転軸２１の第１端部２１ａは、回転軸２１における軸受け１００及び整流子３０のうち軸受け１００側の端部である。第１端部２１ａには、例えば回転ファン等の負荷が取り付けられる。回転軸２１に回転ファンが取り付けられた電動機１は、例えば冷却ファン及び電動送風機として用いることができる。なお、回転軸２１の第２端部２１ｂは、反出力側の端部（反出力軸）であり、第２ブラケット１１２から突出していない。 The first end 21a of the rotating shaft 21 is the output-side end (output shaft). A first end 21 a of the rotary shaft 21 protrudes from the first bracket 111 and the bearing 100 . A first end portion 21 a of the rotating shaft 21 is an end portion of the bearing 100 and the commutator 30 of the rotating shaft 21 on the side of the bearing 100 . A load such as a rotating fan is attached to the first end portion 21a. The electric motor 1 in which a rotating fan is attached to the rotating shaft 21 can be used as, for example, a cooling fan and an electric blower. The second end 21 b of the rotary shaft 21 is the end (counter-output shaft) on the non-output side and does not protrude from the second bracket 112 .
　第１ブラケット１１１及び第２ブラケット１１２は、例えば、金属材料によって構成されている。例えば、第１ブラケット１１１及び第２ブラケット１１２は、冷間圧延鋼板（Ｓｔｅｅｌ　Ｐｌａｔｅ　Ｃｏｌｄ（ＳＰＣ）材）等の鉄系材料又はアルミニウム等の金属によって構成されている。なお、第１ブラケット１１１と第２ブラケット１１２とで筐体が構成されている。この筐体の中に固定子１０と回転子２０とが配置されている。 The first bracket 111 and the second bracket 112 are made of metal material, for example. For example, the first bracket 111 and the second bracket 112 are made of a ferrous material such as a cold-rolled steel plate (SPC) material or a metal such as aluminum. Note that the first bracket 111 and the second bracket 112 constitute a housing. A stator 10 and a rotor 20 are arranged in this housing.
　図１～図３に示すように、第１ブラケット１１１は、電動機１の外郭部材である。第１ブラケット１１１は、底部及び円筒状の側壁部を有する有底筒形状に形成されている。固定子１０を構成する磁石は、第１ブラケット１１１の底部に固定されている。回転子２０のコイル２２は、第１ブラケット１１１の側壁部に囲まれている。なお、第１ブラケット１１１及び第２ブラケット１１２の材質は、金属材料に限るものではなく、樹脂材料であってもよい。しかし、電動機１から発生するノイズを抑制するとの観点では、第１ブラケット１１１及び第２ブラケット１１２は、金属材料によって構成されているとよい。 　As shown in FIGS. 1 to 3, the first bracket 111 is an outer shell member of the electric motor 1. As shown in FIGS. The first bracket 111 is formed in a bottomed tubular shape having a bottom portion and a cylindrical side wall portion. Magnets forming the stator 10 are fixed to the bottom of the first bracket 111 . The coils 22 of the rotor 20 are surrounded by side walls of the first bracket 111 . In addition, the material of the first bracket 111 and the second bracket 112 is not limited to the metal material, and may be a resin material. However, from the viewpoint of suppressing noise generated from the electric motor 1, the first bracket 111 and the second bracket 112 are preferably made of a metal material.
　回転子２０のコイル２２は、巻線コイルである。回転子２０は、複数のコイル２２を有する。複数のコイル２２は、電線によって構成された電機子巻線である。複数のコイル２２は、電流が流れることで固定子１０に作用する磁力を発生するように巻回されている。各コイル２２が発生する主磁束の向きは、回転軸２１が延伸する軸心Ｃ方向である。具体的には、複数のコイル２２は、扁平状に巻回されており、コイル面は、回転軸２１が延伸する軸心Ｃ方向を向く姿勢で配置されている。 The coils 22 of the rotor 20 are wound coils. The rotor 20 has multiple coils 22 . The multiple coils 22 are armature windings configured by electric wires. The plurality of coils 22 are wound so as to generate magnetic force acting on the stator 10 when current flows. The direction of the main magnetic flux generated by each coil 22 is the axial center C direction along which the rotating shaft 21 extends. Specifically, the plurality of coils 22 are wound in a flat shape, and the coil surfaces are arranged in a posture facing the axial center C direction along which the rotating shaft 21 extends.
　各コイル２２は、銅又はアルミニウム等の金属からなる芯線と芯線を被膜する絶縁膜とを有する絶縁被覆線によって構成されている。複数のコイル２２の各々は、この絶縁被覆線が平面状に巻回されたコイル層を有する薄形の巻線コイルである。具体的には、複数のコイル２２の各々は、例えば、絶縁被覆線が平面視で略扇状に巻回された１層又は複数のコイル層によって構成されている。このように構成された複数のコイル２２は、回転軸２１が延伸する軸心Ｃ方向から見たときに、回転軸２１を囲むように配置されている。 Each coil 22 is composed of an insulating covered wire having a core wire made of metal such as copper or aluminum and an insulating film covering the core wire. Each of the plurality of coils 22 is a thin wound coil having a coil layer in which the insulated wire is wound in a plane. Specifically, each of the plurality of coils 22 is configured by, for example, one or a plurality of coil layers in which an insulated wire is wound in a substantially fan shape in a plan view. The plurality of coils 22 configured in this way are arranged so as to surround the rotating shaft 21 when viewed from the axial center C direction along which the rotating shaft 21 extends.
　複数のコイル２２の各々は、整流子３０と電気的に接続されている。具体的には、複数のコイル２２の各々は、整流子３０を成す複数の整流子片３１のいずれかと電気的に接続されている。したがって、複数のコイル２２の各々には、ブラシ４０が接する整流子片３１を介して電流が流れる。 Each of the multiple coils 22 is electrically connected to the commutator 30 . Specifically, each of the multiple coils 22 is electrically connected to one of the multiple commutator segments 31 forming the commutator 30 . Therefore, current flows through each of the plurality of coils 22 via the commutator segments 31 with which the brushes 40 are in contact.
　複数のコイル２２は、モールド樹脂２３で覆われている。つまり、複数のコイル２２は、樹脂モールド成型されている。したがって、複数のコイル２２は、モールド樹脂２３で覆われることでモールド樹脂２３とともに一体に成型されている。複数のコイル２２をモールドした後、モールド樹脂２３の外形の平面視形状は、円形である。モールド樹脂２３は、例えばフェノール樹脂又は不飽和ポリエステル（Ｂｕｌｋ　Ｍｏｌｄｉｎｇ　Ｃｏｍｐｏｕｎｄ（ＢＭＣ））等の絶縁性樹脂材料によって構成されている。なお、モールド樹脂２３は、熱硬化性樹脂及び熱可塑性樹脂のいずれであってもよい。 A plurality of coils 22 are covered with molding resin 23 . That is, the plurality of coils 22 are resin molded. Therefore, the plurality of coils 22 are integrally molded together with the molding resin 23 by being covered with the molding resin 23 . After the plurality of coils 22 are molded, the outer shape of the mold resin 23 is circular in plan view. The mold resin 23 is made of an insulating resin material such as phenol resin or unsaturated polyester (Bulk Molding Compound (BMC)). The mold resin 23 may be either thermosetting resin or thermoplastic resin.
　整流子３０は、回転軸２１に取り付けられている。したがって、整流子３０は、回転子２０が回転することで回転軸２１とともに回転する。本実施の形態において、整流子３０は、回転軸２１の第２端部２１ｂに取り付けられている。回転軸２１に取り付けられた整流子３０は、回転子２０の一部であってもよい。 The commutator 30 is attached to the rotating shaft 21 . Therefore, the commutator 30 rotates together with the rotating shaft 21 as the rotor 20 rotates. In this embodiment, the commutator 30 is attached to the second end 21b of the rotating shaft 21 . A commutator 30 attached to the rotating shaft 21 may be part of the rotor 20 .
　整流子３０は、回転軸２１の回転方向に沿って設けられた複数の整流子片３１（整流子セグメント）を有する。具体的には、複数の整流子片３１は、回転軸２１を囲むように回転軸２１の回転方向に沿って円環状に配列されている。なお、各整流子片３１の形状は、回転軸２１の長手方向に延在する長尺状部材である。 The commutator 30 has a plurality of commutator pieces 31 (commutator segments) provided along the rotating direction of the rotating shaft 21 . Specifically, the plurality of commutator segments 31 are annularly arranged along the rotation direction of the rotation shaft 21 so as to surround the rotation shaft 21 . Each commutator piece 31 is an elongated member extending in the longitudinal direction of the rotating shaft 21 .
　複数の整流子片３１は、銅等の金属材料によって構成された導電端子である。複数の整流子片３１は、回転子２０が有するコイル２２と電気的に接続されている。複数の整流子片３１は、互いに絶縁分離されて配置されている。複数の整流子片３１は、回転子２０のコイル２２によって電気的に接続されている。 The plurality of commutator segments 31 are conductive terminals made of a metal material such as copper. The multiple commutator segments 31 are electrically connected to the coils 22 of the rotor 20 . The plurality of commutator segments 31 are arranged insulated from each other. The multiple commutator segments 31 are electrically connected by the coils 22 of the rotor 20 .
　一例として、整流子３０は、モールド整流子である。整流子３０は、複数の整流子片３１がモールド樹脂によってモールドされた構成になっている。この場合、複数の整流子片３１は、表面が露出するようにモールド樹脂に埋め込まれている。モールド樹脂は、整流子本体である。モールド樹脂は、回転軸２１が挿入される貫通孔を有する実質的な筒状部材である。モールド樹脂は、例えば、熱硬化性樹脂等の絶縁性樹脂材料によって構成された樹脂成型体である。 As an example, the commutator 30 is a molded commutator. The commutator 30 has a configuration in which a plurality of commutator segments 31 are molded with molding resin. In this case, the plurality of commutator segments 31 are embedded in the molding resin so that their surfaces are exposed. The mold resin is the commutator body. The mold resin is a substantially tubular member having a through hole into which the rotary shaft 21 is inserted. The mold resin is, for example, a molded resin body made of an insulating resin material such as a thermosetting resin.
　整流子３０には、少なくとも１つのブラシ４０が接触している。具体的には、ブラシ４０の先端部が整流子３０の整流子片３１に接している。ブラシ４０は、回転軸２１の回転により整流子３０が回転するため、全ての整流子片３１と順次接触し続ける。 At least one brush 40 is in contact with the commutator 30 . Specifically, the tip of the brush 40 is in contact with the commutator piece 31 of the commutator 30 . Since the commutator 30 rotates as the rotating shaft 21 rotates, the brush 40 keeps contacting all the commutator segments 31 sequentially.
　ブラシ４０は、コイル２２に電力を供給するための給電ブラシである。具体的には、ブラシ４０は、整流子３０の整流子片３１に接することでコイル２２に電力を供給する。ブラシ４０は、ピグテール線によってブラシホルダ６０に固定された端子８０と接続されている。ブラシ４０が整流子片３１に接触することにより、端子８０からブラシ４０に供給される電機子電流が、整流子片３１を介してコイル２２に流れる。 The brush 40 is a power supply brush for supplying power to the coil 22. Specifically, the brush 40 supplies power to the coil 22 by contacting the commutator segments 31 of the commutator 30 . The brush 40 is connected to a terminal 80 fixed to the brush holder 60 by a pigtail wire. The contact of the brushes 40 with the commutator segments 31 causes the armature current supplied from the terminals 80 to the brushes 40 to flow through the coils 22 via the commutator segments 31 .
　一例として、ブラシ４０は、カーボンによって構成された導電性を有するカーボンブラシであり、長尺状の実質的な直方体である。この場合、ブラシ４０は、銅等の金属を含むカーボンブラシであるとよい。これにより、ブラシ４０と整流子片３１との接触抵抗を小さくすることができる。このようなブラシ４０は、例えば、黒鉛粉と銅紛とバインダー樹脂と硬化剤とを混錬した混錬物を粉砕して直方体に圧縮成型して焼成することで作製することができる。 As an example, the brush 40 is a conductive carbon brush made of carbon, and is a substantially elongated rectangular parallelepiped. In this case, the brush 40 is preferably a carbon brush containing metal such as copper. Thereby, the contact resistance between the brushes 40 and the commutator segments 31 can be reduced. Such a brush 40 can be produced, for example, by pulverizing a kneaded material obtained by kneading graphite powder, copper powder, a binder resin, and a curing agent, compressing and molding the material into a rectangular parallelepiped, and firing the material.
　ブラシ４０は、複数設けられている。具体的には、図３及び図５に示すように、電動機１には、２つのブラシ４０が設けられている。２つのブラシ４０は、回転子２０の回転方向に沿って１８０°間隔で配置されている。つまり、２つのブラシ４０の長手方向のなす角は１８０°である。なお、２つのブラシ４０は、回転軸２１の軸心Ｃを中心に線対称に配置されていれば、２つのブラシ４０のなす角は１８０°でなくてもよく、例えば６０°等の９０°以下であってもよい。 A plurality of brushes 40 are provided. Specifically, as shown in FIGS. 3 and 5, the electric motor 1 is provided with two brushes 40 . The two brushes 40 are arranged at 180° intervals along the rotation direction of the rotor 20 . That is, the angle formed by the longitudinal directions of the two brushes 40 is 180°. As long as the two brushes 40 are arranged symmetrically about the axis C of the rotating shaft 21, the angle formed by the two brushes 40 may not be 180°, and may be 90° such as 60°. It may be below.
　ブラシ４０は、ブラシバネ５０からの押圧力を受けて、整流子３０の整流子片３１と常に接している。つまり、ブラシ４０は、ブラシバネ５０によって整流子３０に押し付けられている。このように、ブラシ４０は、ブラシバネ５０からの押圧力を受けて整流子３０に摺接する。これとともに、ブラシ４０は、整流子３０との摩耗により回転軸２１が延伸する軸心Ｃ方向とは交差する方向（径方向）に移動可能に配置されている。 The brushes 40 are always in contact with the commutator segments 31 of the commutator 30 under pressure from the brush springs 50 . That is, the brushes 40 are pressed against the commutator 30 by the brush springs 50 . In this manner, the brushes 40 receive the pressing force from the brush springs 50 and come into sliding contact with the commutator 30 . Along with this, the brush 40 is arranged so as to be movable in a direction (radial direction) intersecting with the axial center C direction along which the rotating shaft 21 extends due to wear with the commutator 30 .
　ブラシバネ５０は、ブラシ４０の数に応じて設けられている。電動機１には、２つのブラシ４０が設けられているので、ブラシバネ５０も２つ設けられている。ブラシ４０及びブラシバネ５０は、ブラシホルダ６０に収納されて、カバープレート７０で覆われている。 The brush springs 50 are provided according to the number of brushes 40. Since the electric motor 1 is provided with two brushes 40, two brush springs 50 are also provided. The brush 40 and brush spring 50 are housed in a brush holder 60 and covered with a cover plate 70 .
　ブラシバネ５０は、バネ弾性力（バネ復元力）によってブラシ４０に押圧（バネ圧）を付与し、ブラシ４０を整流子３０に向けて付勢している。ブラシ４０は、整流子片３１との摩擦によって摩耗していくことで、ブラシバネ５０からの押圧力により回転軸２１の軸心Ｃに向かう方向（径方向）に移動していく。 The brush spring 50 applies pressure (spring pressure) to the brush 40 by spring elastic force (spring restoring force) to urge the brush 40 toward the commutator 30 . As the brush 40 wears due to friction with the commutator segments 31 , the pressing force from the brush spring 50 causes the brush 40 to move in the direction (radial direction) toward the axis C of the rotating shaft 21 .
　ブラシバネ５０は、定荷重バネである。したがって、ブラシバネ５０は、ブラシ４０に均一な荷重を付与している。つまり、定荷重バネであるブラシバネ５０は、ブラシ４０に均一な押圧力を付与している。なお、ブラシバネ５０は、定荷重バネに限らず、圧縮コイルバネ又はトーションバネ等であってもよい。 The brush spring 50 is a constant force spring. Therefore, the brush spring 50 applies a uniform load to the brush 40 . That is, the brush spring 50, which is a constant force spring, applies a uniform pressing force to the brush 40. As shown in FIG. Note that the brush spring 50 is not limited to a constant force spring, and may be a compression coil spring, a torsion spring, or the like.
　定荷重バネであるブラシバネ５０は、帯状の線材により構成されている。定荷重バネであるブラシバネ５０は、渦巻バネである。定荷重バネであるブラシバネ５０は、帯状の線材が渦巻状に巻回された渦巻部５０ａ（コイル部）を有する。定荷重バネであるブラシバネ５０は、例えば、金属材料等からなる１枚の帯板状の線材によって構成されている。 The brush spring 50, which is a constant load spring, is made of a strip-shaped wire rod. The brush spring 50, which is a constant force spring, is a spiral spring. A brush spring 50, which is a constant force spring, has a spiral portion 50a (coil portion) formed by spirally winding a strip-shaped wire. The brush spring 50, which is a constant force spring, is made of, for example, a strip-shaped wire rod made of a metal material or the like.
　具体的には、定荷重バネであるブラシバネ５０は、長尺状かつ帯状の金属板によって構成されている。したがって、渦巻部５０ａは、定荷重バネにおいて、長尺状かつ帯状の金属板が一方向のみに渦巻状に複数回巻かれた部分である。定荷重バネであるブラシバネ５０は、渦巻状の渦巻部５０ａから線材の一方の端部を引き延ばすことで、元の渦巻状の状態に戻る力（バネ復元力）が発生する。 Specifically, the brush spring 50, which is a constant force spring, is made of a long strip-shaped metal plate. Therefore, the spiral portion 50a is a portion of the constant force spring in which a long strip-shaped metal plate is spirally wound multiple times only in one direction. The brush spring 50, which is a constant force spring, generates a force (spring restoring force) to return to the original spiral state by extending one end of the wire rod from the spiral portion 50a.
　ブラシバネ５０は、渦巻部５０ａによってブラシ４０を整流子３０に押し付けている。具体的には、ブラシバネ５０は、渦巻部５０ａがブラシ４０の後端部に接触することで、渦巻部５０ａのバネ復元力によってブラシ４０に荷重を付与している。この場合、ブラシバネ５０によりブラシ４０が整流子３０を押圧する荷重は、回転子２０の回転中に発生するラジアル荷重に対して１倍以上であるとよい。 The brush spring 50 presses the brush 40 against the commutator 30 with the spiral portion 50a. Specifically, the brush spring 50 imparts a load to the brush 40 by the spring restoring force of the spiral portion 50 a when the spiral portion 50 a contacts the rear end portion of the brush 40 . In this case, the load with which the brush springs 50 press the brushes 40 against the commutator 30 is preferably at least 1 time the radial load generated during the rotation of the rotor 20 .
　ブラシバネ５０は、渦巻部５０ａの渦巻軸と回転軸２１が延伸する軸心Ｃ方向とがねじれの位置となるように配置されている。つまり、渦巻部５０ａが縦置きとなるようにブラシバネ５０が設置されており、渦巻部５０ａの渦巻面（コイル面）が回転軸２１の軸心Ｃと平行になっている。 The brush spring 50 is arranged so that the spiral axis of the spiral portion 50a and the direction of the axis C along which the rotating shaft 21 extends are twisted. That is, the brush spring 50 is installed so that the spiral portion 50a is vertically placed, and the spiral surface (coil surface) of the spiral portion 50a is parallel to the axis C of the rotating shaft 21. As shown in FIG.
　ブラシ４０には、端子８０を介して、電動機１の外部に配置された外部電源から電力が供給される。外部電源は、電動機１の外部に存在する電源である。外部電源は、電動機１に所定の入力電圧を供給する。本実施の形態において、外部電源は、電動機１にＤＣ１２Ｖの入力電圧を供給する直流電源である。 Electric power is supplied to the brushes 40 from an external power supply arranged outside the electric motor 1 via terminals 80 . The external power supply is a power supply that exists outside the electric motor 1 . The external power supply supplies the electric motor 1 with a predetermined input voltage. In the present embodiment, the external power supply is a DC power supply that supplies the electric motor 1 with an input voltage of DC 12V.
　端子８０は、ブラシ４０を介して回転子２０のコイル２２に通電する電力を受電する。具体的には、外部電源が直流電源であるので、端子８０は、入力電圧として直流電圧を受電する。 The terminals 80 receive electric power that energizes the coils 22 of the rotor 20 via the brushes 40 . Specifically, since the external power supply is a DC power supply, the terminal 80 receives a DC voltage as an input voltage.
　図５及び図６に示すように、電動機１には、２つの端子８０が設けられている。この場合、２つの端子８０の一方の端子（第１端子）は、高電圧側端子（プラス端子）である。２つの端子８０の他方の端子（第２端子）は、低電圧側端子（マイナス端子）である。詳細は後述するが、２つの端子８０は、ブラシホルダ６０に取り付けられている。端子８０には、電線１２０が接続されている。端子８０は、電線１２０を介して外部電源から電力を受電する。 As shown in FIGS. 5 and 6, the electric motor 1 is provided with two terminals 80 . In this case, one terminal (first terminal) of the two terminals 80 is the high voltage side terminal (positive terminal). The other terminal (second terminal) of the two terminals 80 is the low voltage side terminal (minus terminal). Although details will be described later, the two terminals 80 are attached to the brush holder 60 . An electric wire 120 is connected to the terminal 80 . Terminal 80 receives power from an external power source via wire 120 .
　電線１２０は、端子８０に電力を供給するための給電線である。例えば、電線１２０は、ハーネスである。電線１２０は、２つの端子８０の各々に接続されている。つまり、電動機１には、２本の電線１２０が接続されている。この場合、一対の電線１２０のうち高電圧側端子である端子８０に接続される電線１２０は、高電圧側給電線（プラス側配線）である。一対の電線１２０のうち低電圧側端子である端子８０に接続される電線１２０は、低電圧側給電線（マイナス側配線）である。各電線１２０は、ビニル線等の絶縁被覆線であり、銅等の導電体からなる芯線と、芯線を被覆する絶縁被膜とを有する。 The electric wire 120 is a feeder line for supplying power to the terminal 80 . For example, the electric wire 120 is a harness. The electric wire 120 is connected to each of the two terminals 80 . That is, two electric wires 120 are connected to the electric motor 1 . In this case, of the pair of wires 120, the wire 120 connected to the terminal 80, which is the high-voltage side terminal, is the high-voltage side feeder line (positive side wiring). Of the pair of wires 120, the wire 120 connected to the terminal 80, which is the low-voltage side terminal, is the low-voltage side feeder line (negative side wiring). Each electric wire 120 is an insulated wire such as a vinyl wire, and has a core wire made of a conductor such as copper and an insulating coating covering the core wire.
　ブラシ４０と端子８０とは、ピグテール線によって接続されている。具体的には、ピグテール線の一端がブラシ４０に接続されている。ピグテール線の他端が端子８０に接続されている。電線１２０によって外部電源から端子８０に電力が供給されることで、端子８０に接続されたピグテールを介してブラシ４０に電流が供給される。 The brush 40 and the terminal 80 are connected by a pigtail wire. Specifically, one end of the pigtail wire is connected to the brush 40 . The other end of the pigtail wire is connected to terminal 80 . Electric power is supplied from an external power supply to the terminal 80 via the electric wire 120 , thereby supplying current to the brush 40 via the pigtail connected to the terminal 80 .
　以上のように構成される電動機１では、ブラシ４０に供給される電流が電機子電流（駆動電流）として整流子３０の整流子片３１を介してコイル２２に流れる。これにより、回転子２０（コイル２２）に磁束が発生する。回転子２０に生じた磁束と固定子１０から生じる磁束との相互作用によって生じた磁気力とが回転子２０を回転させるトルクとなる。このとき、整流子３０の整流子片３１とブラシ４０とが接する際の位置関係によって電流が流れる方向が切り替えられる。このように、電流が流れる方向が切り替えられることで、固定子１０と回転子２０との間に発生する磁力の反発力と吸引力とで一定方向の回転力が生成され、回転子２０が回転軸２１を中心として回転する。 In the electric motor 1 configured as described above, the current supplied to the brushes 40 flows through the coils 22 via the commutator segments 31 of the commutator 30 as armature current (driving current). As a result, magnetic flux is generated in the rotor 20 (coil 22). A magnetic force generated by interaction between the magnetic flux generated in the rotor 20 and the magnetic flux generated from the stator 10 becomes the torque that rotates the rotor 20 . At this time, the direction in which the current flows is switched depending on the positional relationship when the commutator segments 31 of the commutator 30 and the brushes 40 are in contact with each other. In this way, by switching the direction of current flow, the repulsive force and the attractive force of the magnetic force generated between the stator 10 and the rotor 20 generate a rotational force in a fixed direction, causing the rotor 20 to rotate. It rotates about axis 21 .
　次に、本実施の形態に係る電動機１の特徴的な構造として、ブラシホルダ６０と端子８０との詳細な構造について、図３～図６を参照しつつ、図７～図１０Ｄを用いて説明する。図７は、実施の形態に係る電動機１の一部の構成を示す断面斜視図である。図８は、実施の形態に係る電動機１に用いられる端子８０を斜め上方から見たときの斜視図である。図９は、実施の形態に係る電動機１に用いられる端子８０を斜め下方から見たときの斜視図である。図１０Ａは、実施の形態に係る端子８０の構成を示す上面図である。図１０Ｂは、実施の形態に係る端子８０の構成を示す正面図である。図１０Ｃは、実施の形態に係る端子８０の構成を示す左側面図である。図１０Ｄは、実施の形態に係る端子８０の構成を示す右側面図である。 Next, as a characteristic structure of the electric motor 1 according to the present embodiment, detailed structures of the brush holder 60 and the terminal 80 will be described with reference to FIGS. 3 to 6 and FIGS. 7 to 10D. do. FIG. 7 is a cross-sectional perspective view showing a configuration of part of the electric motor 1 according to the embodiment. FIG. 8 is a perspective view of the terminal 80 used in the electric motor 1 according to the embodiment, viewed obliquely from above. FIG. 9 is a perspective view of the terminal 80 used in the electric motor 1 according to the embodiment, viewed obliquely from below. FIG. 10A is a top view showing the configuration of terminal 80 according to the embodiment. FIG. 10B is a front view showing the configuration of terminal 80 according to the embodiment. FIG. 10C is a left side view showing the configuration of terminal 80 according to the embodiment. FIG. 10D is a right side view showing the configuration of terminal 80 according to the embodiment.
　ブラシホルダ６０は、ブラシ４０を保持する保持部材である。図３に示すように、ブラシホルダ６０は、電動機１の外郭を構成する外郭部材でもある。ブラシホルダ６０は、第２ブラケット１１２を外側から覆っている。 The brush holder 60 is a holding member that holds the brush 40 . As shown in FIG. 3 , the brush holder 60 is also an outer shell member forming the outer shell of the electric motor 1 . The brush holder 60 covers the second bracket 112 from the outside.
　ブラシホルダ６０は、例えば、絶縁性の樹脂材料によって構成されている。ブラシホルダ６０は、樹脂材料を用いた一体成型により形成された樹脂成型品である。一例として、ブラシホルダ６０を構成する樹脂材料は、フェノール樹脂である。しかし、ブラシホルダ６０を構成する樹脂材料は、これに限らない。 The brush holder 60 is made of, for example, an insulating resin material. The brush holder 60 is a resin molded product formed by integral molding using a resin material. As an example, the resin material forming the brush holder 60 is phenol resin. However, the resin material forming the brush holder 60 is not limited to this.
　ブラシホルダ６０は、ブラシ４０が収納されるブラシ収納部６１を有する。ブラシ収納部６１は、凹状に形成された凹部である。ブラシ収納部６１は、ブラシ４０の数に応じて形成されている。本実施の形態では、ブラシホルダ６０には、２つのブラシ収納部６１が形成されている。２つのブラシ収納部６１の各々は、回転軸２１の軸心Ｃと直交する方向（つまり回転軸２１の回転の径方向）に長尺で、かつ、断面形状が矩形の凹状に形成されている。 The brush holder 60 has a brush storage portion 61 in which the brush 40 is stored. The brush housing portion 61 is a concave portion formed in a concave shape. The brush housing portions 61 are formed according to the number of brushes 40 . In this embodiment, the brush holder 60 is formed with two brush housings 61 . Each of the two brush housing portions 61 is elongated in a direction orthogonal to the axis C of the rotating shaft 21 (that is, the radial direction of the rotation of the rotating shaft 21), and has a concave rectangular cross-sectional shape. .
　ブラシ収納部６１には、ブラシ４０とともにブラシバネ５０も収納されている。したがって、ブラシ収納部６１の長手方向の長さは、ブラシ４０の長さよりも長くなっている。具体的には、ブラシバネ５０は、渦巻部５０ａがブラシ４０の後端部の後方に位置するようにブラシ収納部６１に配置される。この場合、ブラシバネ５０の外側端部は、ブラシ４０の下方を通って整流子３０に向けて引き出されて、ブラシ収納部６１の前方底部に固定されている。 The brush storage portion 61 stores the brush spring 50 together with the brush 40 . Therefore, the longitudinal length of the brush housing portion 61 is longer than the length of the brush 40 . Specifically, the brush spring 50 is arranged in the brush housing portion 61 so that the spiral portion 50 a is positioned behind the rear end portion of the brush 40 . In this case, the outer ends of the brush springs 50 are pulled out toward the commutator 30 through below the brushes 40 and fixed to the front bottom of the brush housing 61 .
　ブラシ収納部６１に収納されたブラシ４０を覆うようにカバープレート７０が設けられている。カバープレート７０は、ブラシ収納部６１に収納されたブラシ４０及びブラシバネ５０を覆っている。カバープレート７０は、ブラシ４０の摩耗とともに整流子３０側に向かってブラシバネ５０の渦巻部５０ａが移動する際に、渦巻部５０ａをガイドする機能も有する。具体的には、カバープレート７０には、渦巻部５０ａの上部分が嵌る凹状の溝部が形成されている。渦巻部５０ａは、この溝部でガイドされながら移動する。カバープレート７０は、例えば、金属板によって構成されている。カバープレート７０は、ブラシ収納部６１に蓋をするように配置されている。 A cover plate 70 is provided to cover the brushes 40 housed in the brush housing portion 61 . The cover plate 70 covers the brushes 40 and the brush springs 50 housed in the brush housing portion 61 . The cover plate 70 also has a function of guiding the spiral portion 50a of the brush spring 50 when the spiral portion 50a moves toward the commutator 30 as the brush 40 wears. Specifically, the cover plate 70 is formed with a recessed groove into which the upper portion of the spiral portion 50a is fitted. The spiral portion 50a moves while being guided by this groove. The cover plate 70 is made of, for example, a metal plate. The cover plate 70 is arranged to cover the brush housing portion 61 .
　上述のように、ブラシ４０には、端子８０（第１の端子、第２の端子）を介して電力が供給される。端子８０は、ブラシホルダ６０に取り付けられている。端子８０は、外部電源から電力を受電する電源端子である。端子８０には電線１２０が接続されている。端子８０は、電線１２０を介して電力を受電する。 As described above, power is supplied to the brush 40 through the terminals 80 (first terminal, second terminal). A terminal 80 is attached to the brush holder 60 . A terminal 80 is a power supply terminal that receives power from an external power supply. A wire 120 is connected to the terminal 80 . Terminal 80 receives power through wire 120 .
　端子８０には、コンデンサ９０が接続されている。コンデンサ９０は、リードタイプのコンデンサ（リード付きコンデンサ）である。コンデンサ９０は、本体部９１を有する。コンデンサ９０は、一対のリード９２（第１のリード、第２のリード）を有する。本体部９１は、一対の陽極及び陰極と、一対の陽極及び陰極の間に配置された電解質及び誘電体と、一対の陽極及び陰極と電解質及び誘電体とを覆う絶縁性の外郭部材とを有する。一対のリード９２は、本体部９１から引き出されたリードピン（リード端子）である。一対のリード９２は、金属線等の導電線によって構成されている。一対のリード９２は、本体部９１の陽極又は陰極に接続されている。 A capacitor 90 is connected to the terminal 80 . The capacitor 90 is a lead type capacitor (capacitor with leads). Capacitor 90 has a body portion 91 . The capacitor 90 has a pair of leads 92 (first lead, second lead). The body part 91 has a pair of anode and cathode, an electrolyte and a dielectric disposed between the pair of anode and cathode, and an insulating outer shell member covering the pair of anode and cathode, the electrolyte and the dielectric. . The pair of leads 92 are lead pins (lead terminals) drawn out from the body portion 91 . The pair of leads 92 are composed of conductive wires such as metal wires. A pair of leads 92 are connected to the anode or cathode of the body portion 91 .
　コンデンサ９０は、ノイズ低減用のコンデンサである。コンデンサ９０は、一対の端子８０の間に並列接続される。つまり、コンデンサ９０の一方のリード９２は、一対の端子８０の一方に接続される。コンデンサ９０の他方のリード９２は、一対の端子８０の他方に接続される。コンデンサ９０の容量は、一例として、０．００１μＦである。これにより、３０～１００ＭＨｚ帯の周波数のノイズを効果的に低減することができる。コンデンサ９０は、耐熱性に優れているものが好ましい。コンデンサ９０は、一例として、セラミックコンデンサである。なお、コンデンサ９０の容量は、０．００１μＦに限るものではなく、低減するノイズの周波数に応じて設定される。なお、電動機１には、２つのコンデンサ９０が配置される。したがって、一対の端子８０には、２つのコンデンサ９０が並列接続されている。 The capacitor 90 is a capacitor for noise reduction. A capacitor 90 is connected in parallel between the pair of terminals 80 . That is, one lead 92 of the capacitor 90 is connected to one of the pair of terminals 80 . The other lead 92 of the capacitor 90 is connected to the other of the pair of terminals 80 . The capacitance of the capacitor 90 is, for example, 0.001 μF. As a result, noise in the frequency band of 30-100 MHz can be effectively reduced. The capacitor 90 preferably has excellent heat resistance. Capacitor 90 is, for example, a ceramic capacitor. Note that the capacitance of the capacitor 90 is not limited to 0.001 μF, and is set according to the frequency of noise to be reduced. Note that two capacitors 90 are arranged in the electric motor 1 . Therefore, two capacitors 90 are connected in parallel to the pair of terminals 80 .
　図８～図１０Ｄに示すように、端子８０は、板状の天板部８１と、天板部８１に対して立設する板状の立板部８２とを有する。天板部８１は、ブラシホルダ６０に載置される載置部として機能する。立板部８２は、コンデンサ９０のリード９２が接続されるリード接続部として機能する。 As shown in FIGS. 8 to 10D, the terminal 80 has a plate-like top plate portion 81 and a plate-like standing plate portion 82 standing upright from the top plate portion 81 . The top plate portion 81 functions as a mounting portion that is mounted on the brush holder 60 . The upright plate portion 82 functions as a lead connection portion to which the lead 92 of the capacitor 90 is connected.
　端子８０は、さらに、上面視において、天板部８１から外方に向けて突出する板状の突出板部８３を有している。立板部８２は、突出板部８３の外側端部から垂下するように形成されている。立板部８２と突出板部８３とは、折れ曲がるように形成されている。立板部８２と突出板部８３とは、断面Ｌ字形状となるように形成されている。 The terminal 80 further has a plate-shaped protruding plate portion 83 protruding outward from the top plate portion 81 when viewed from above. The upright plate portion 82 is formed so as to hang down from the outer end portion of the projecting plate portion 83 . The upright plate portion 82 and the projecting plate portion 83 are formed to be bent. The upright plate portion 82 and the projecting plate portion 83 are formed to have an L-shaped cross section.
　突出板部８３は、天板部８１の側端部から側方に向けて突出している。突出板部８３は、天板部８１から水平方向に延在する延在部である。突出板部８３を設けることで、天板部８１の側端部と立板部８２との間にスペースを形成することができる。 The protruding plate portion 83 protrudes laterally from the side end portion of the top plate portion 81 . The projecting plate portion 83 is an extension portion that extends horizontally from the top plate portion 81 . By providing the projecting plate portion 83 , a space can be formed between the side end portion of the top plate portion 81 and the upright plate portion 82 .
　突出板部８３は、天板部８１の対向する一対の側端部の各々から突出している。つまり、突出板部８３は、一対設けられている。一対の突出板部８３は、天板部８１を挟んで対向する位置に設けられている。したがって、立板部８２も一対設けられている。立板部８２及び突出板部８３の各々は、一定の幅を有する板状体である。立板部８２と突出板部８３とは、同じ幅である。したがって、立板部８２と突出板部８３とは、幅一定の細長の板状部材を９０°折り曲げた形状になっている。 The protruding plate portion 83 protrudes from each of a pair of opposing side end portions of the top plate portion 81 . That is, a pair of projecting plate portions 83 are provided. The pair of protruding plate portions 83 are provided at positions facing each other with the top plate portion 81 interposed therebetween. Therefore, a pair of standing plate portions 82 are also provided. Each of the upright plate portion 82 and the projecting plate portion 83 is a plate-like body having a constant width. The upright plate portion 82 and the projecting plate portion 83 have the same width. Therefore, the standing plate portion 82 and the protruding plate portion 83 have a shape obtained by bending an elongated plate-like member having a constant width by 90 degrees.
　立板部８２には、コンデンサ９０のリード９２が挿通される挿通孔８６が形成されている。コンデンサ９０のリード９２は、挿通孔８６に挿通されて立板部８２に電気的に接続される。立板部８２は、コンデンサ９０のリード９２が接続されるリード接続部として機能する。 An insertion hole 86 through which the lead 92 of the capacitor 90 is inserted is formed in the upright plate portion 82 . A lead 92 of the capacitor 90 is inserted through the insertion hole 86 and electrically connected to the upright plate portion 82 . The upright plate portion 82 functions as a lead connection portion to which the lead 92 of the capacitor 90 is connected.
　挿通孔８６（８６ａ、８６ｂ）は、一対の立板部８２の各々に形成されている。各立板部８２において、挿通孔８６（８６ａ、８６ｂ）は、立板部８２から突出板部８３にわたって連続して形成されている。具体的には、各挿通孔８６（８６ａ、８６ｂ）は、スリット状である。各挿通孔８６（８６ａ、８６ｂ）は、立板部８２から突出板部８３にまたがるように形成されている。つまり、各挿通孔８６（８６ａ、８６ｂ）は、立板部８２に形成された部分（第１開口部）と、突出板部８３に形成された部分（第２開口部）とを有する。各挿通孔８６（８６ａ、８６ｂ）において、立板部８２に形成された部分（第１開口部）は、端子８０を側面視したときに見える部分である。突出板部８３に形成された部分（第２開口部）は、端子８０を上面視したときに見える部分である。このように、各挿通孔８６は、立板部８２と突出板部８３とで構成されるＬ字状の板部に沿ってＬ字状に形成されている。 The insertion holes 86 (86a, 86b) are formed in each of the pair of standing plate portions 82. As shown in FIG. In each upright plate portion 82 , an insertion hole 86 ( 86 a, 86 b ) is formed continuously from the upright plate portion 82 to the projecting plate portion 83 . Specifically, each insertion hole 86 (86a, 86b) is slit-shaped. Each insertion hole 86 ( 86 a , 86 b ) is formed so as to extend over the projecting plate portion 83 from the standing plate portion 82 . That is, each insertion hole 86 (86a, 86b) has a portion (first opening) formed in the standing plate portion 82 and a portion (second opening) formed in the projecting plate portion 83. As shown in FIG. In each insertion hole 86 (86a, 86b), a portion (first opening) formed in the upright plate portion 82 is a portion that can be seen when the terminal 80 is viewed from the side. A portion (second opening) formed in the projecting plate portion 83 is a portion that can be seen when the terminal 80 is viewed from above. Thus, each insertion hole 86 is formed in an L shape along the L-shaped plate portion composed of the standing plate portion 82 and the projecting plate portion 83 .
　一対の挿通孔８６（８６ａ、８６ｂ）のうち一方の挿通孔８６ａと他方の挿通孔８６ｂは、開口長さ（スリット長）が異なっている。具体的には、一対の挿通孔８６（８６ａ、８６ｂ）は、立板部８２の部分の長さについては互いに同じになっている。しかしながら、一対の突出板部８３の部分の長さが互いに異なっている。具体的には、突出板部８３の部分に形成された挿通孔８６ａの長さが相対的に短いものと、突出板部８３の部分に形成された挿通孔８６ｂの長さが相対的に長いものとが存在する。このため、上面視において、一対の挿通孔８６（８６ａ、８６ｂ）は、異なる長さに見える。なお、挿通孔８６（８６ａ、８６ｂ）の開口幅（スリット幅）は、一定である。 Of the pair of insertion holes 86 (86a, 86b), one insertion hole 86a and the other insertion hole 86b have different opening lengths (slit lengths). Specifically, the pair of insertion holes 86 (86a, 86b) have the same length in the upright portion 82 portion. However, the lengths of the portions of the pair of projecting plate portions 83 are different from each other. Specifically, the length of the insertion hole 86a formed in the projecting plate portion 83 is relatively short, and the length of the insertion hole 86b formed in the projecting plate portion 83 is relatively long. Things exist. Therefore, when viewed from above, the pair of insertion holes 86 (86a, 86b) appear to have different lengths. The opening width (slit width) of the insertion holes 86 (86a, 86b) is constant.
　本構成とすれば、挿通孔８６ａに挿入されるリード９２を位置決め部材として利用できる。このため、作業性を向上できる。 With this configuration, the lead 92 inserted into the insertion hole 86a can be used as a positioning member. Therefore, workability can be improved.
　すなわち、挿通孔８６ａは、突出板部８３から立板部８２に亘って、やや斜め方向に開いた開口を成している。よって、挿通孔８６ａには、一方のリード９２ａが容易に挿入できる。挿通孔８６ａに挿入された一方のリード９２ａには、突出板部８３の背面も位置決めを促すように作用する。 In other words, the insertion hole 86a forms an opening that extends from the projecting plate portion 83 to the standing plate portion 82 in a slightly oblique direction. Therefore, one lead 92a can be easily inserted into the insertion hole 86a. The rear surface of the protruding plate portion 83 also acts to promote positioning of one lead 92a inserted into the insertion hole 86a.
　つぎに、挿通孔８６ｂは、突出板部８３において、挿通孔８６ａよりも長い開口を有する。挿通孔８６ｂに他方のリード９２ｂが挿入される際、挿通孔８６ａは、挿入されたリード９２ａに対して支点の機能を発揮する。よって、挿通孔８６ａを支点とするコンデンサ９０は、容易に取り付け位置が定まる。このとき、挿通孔８６ｂは、突出板部８３に対して長い開口を有する。挿通孔８６ｂに他方のリード９２ｂを挿入するとき、挿通孔８６ａ、８６ｂ方向に対するリード９２ａ、９２ｂの挿入寸法に多少のブレが生じたとしても、挿通孔８６ｂは、突出板部８３に対して長い開口を有するため、他方のリード９２ｂは容易に挿入できる。 Next, the insertion hole 86b has an opening in the projecting plate portion 83 that is longer than the insertion hole 86a. When the other lead 92b is inserted into the insertion hole 86b, the insertion hole 86a functions as a fulcrum for the inserted lead 92a. Therefore, the mounting position of the capacitor 90 having the insertion hole 86a as a fulcrum is easily determined. At this time, the insertion hole 86b has a long opening with respect to the projecting plate portion 83. As shown in FIG. When inserting the other lead 92b into the insertion hole 86b, even if the insertion dimension of the leads 92a and 92b with respect to the direction of the insertion holes 86a and 86b is slightly deviated, the insertion hole 86b is longer than the projecting plate portion 83. Since it has an opening, the other lead 92b can be easily inserted.
　本順番でコンデンサ９０の取付け作業を行えば、挿通孔８６にリード９２を挿入する作業は、効率よく行うことができる。 By performing the mounting work of the capacitors 90 in this order, the work of inserting the leads 92 into the insertion holes 86 can be performed efficiently.
　その後、一対の挿通孔８６に挿入された、一対のリード９２を固定する作業を行う。具体的には、挿通孔８６ａに挿入された一方のリード９２ａが位置決めされた状態で、挿通孔８６ｂに挿入された他方のリード９２ｂに対して、半田付け又はかしめ、あるいは半田付けとかしめの両方などの固定作業を行う。 After that, the work of fixing the pair of leads 92 inserted into the pair of insertion holes 86 is performed. Specifically, while one lead 92a inserted into the insertion hole 86a is positioned, the other lead 92b inserted into the insertion hole 86b is soldered or crimped, or both soldered and crimped. Perform fixing work such as
　このとき、挿通孔８６ｂよりは短い開口である挿通孔８６ａの開口部分と、突出板部８３の背面部分とが、一方のリード９２ａを保持するように作用する。よって、一方のリード９２ａは、挿通孔８６ａで適切に保持される。このような状態で、挿通孔８６ｂに挿入された他方のリード９２ｂのほうから、固定作業を行えば、精度よく、容易に固定作業を行うことができる。挿通孔８６ｂ側の固定作業が終わった後、挿通孔８６ａ側の固定作業を行う。本順番で、固定作業を行えば、リード９２の浮きなどが生じることを抑制できる。このため、固定作業を効率良く行うことができる。本構成は、特に、本実施の形態で説明したリード付きコンデンサのように、軽量な電子部品であれば、より一層顕著な効果が期待できる。 At this time, the opening portion of the insertion hole 86a, which is shorter than the insertion hole 86b, and the back surface portion of the projecting plate portion 83 act to hold one lead 92a. Therefore, one lead 92a is appropriately held in the insertion hole 86a. In this state, if the fixing work is performed from the other lead 92b inserted into the insertion hole 86b, the fixing work can be performed accurately and easily. After the fixing work on the insertion hole 86b side is completed, the fixing work on the insertion hole 86a side is performed. If the fixing work is performed in this order, it is possible to prevent the lead 92 from floating. Therefore, the fixing work can be efficiently performed. This configuration can be expected to have a more pronounced effect particularly in the case of a lightweight electronic component such as the leaded capacitor described in the present embodiment.
　端子８０は、さらに、一対の板状の脚板部８４を有する。一対の脚板部８４は、天板部８１の一対の側端部からそれぞれ垂下するように形成されている。つまり、一対の脚板部８４は、天板部８１の側端部から折れ曲がるように形成されている。一対の脚板部８４は、端子８０をブラシホルダ６０に固定するための固定部として機能する。本実施の形態において、一対の脚板部８４は、一対の立板部８２よりも長くなっている。 The terminal 80 further has a pair of plate-like leg plate portions 84 . A pair of leg plate portions 84 are formed so as to hang down from a pair of side end portions of the top plate portion 81 . That is, the pair of leg plate portions 84 are formed so as to be bent from the side end portions of the top plate portion 81 . The pair of leg plate portions 84 function as fixing portions for fixing the terminal 80 to the brush holder 60 . In this embodiment, the pair of leg plate portions 84 are longer than the pair of standing plate portions 82 .
　端子８０は、電線１２０の芯線を挟持する一対の挟持板部８５を有する。したがって、一対の挟持板部８５は、電線１２０が接続される電線接続部として機能する。一対の挟持板部８５は、速結構造である。電線１２０を一対の挟持板部８５の間に差し込むことで、電線１２０は一対の挟持板部８５に挟み込まれて固定される。これにより、電線１２０と端子８０とが電気的に接続される。なお、電線１２０に接続される端子に返しを設けることで、一対の挟持板部８５との嵌合を補強することができる。一対の挟持板部８５の一方は、天板部８１の一部を天板部８１の裏側に切り起こすことで形成されている。一対の挟持板部８５の他方は、天板部８１の後端部から天板部８１の裏側に向けて折り曲げることで形成されている。 The terminal 80 has a pair of clamping plate portions 85 that clamp the core wire of the electric wire 120 . Therefore, the pair of clamping plate portions 85 function as wire connection portions to which the wires 120 are connected. The pair of clamping plate portions 85 has a quick coupling structure. By inserting the electric wire 120 between the pair of clamping plate portions 85 , the electric wire 120 is clamped and fixed between the pair of clamping plate portions 85 . Thereby, the electric wire 120 and the terminal 80 are electrically connected. By providing a barb on the terminal connected to the electric wire 120, the fitting with the pair of clamping plate portions 85 can be reinforced. One of the pair of holding plate portions 85 is formed by cutting and raising a portion of the top plate portion 81 on the back side of the top plate portion 81 . The other of the pair of holding plate portions 85 is formed by bending the rear end portion of the top plate portion 81 toward the back side of the top plate portion 81 .
　端子８０は、金属材料等の導電材料によって構成された導電板である。本実施の形態において、端子８０は、銅合金によって構成されている。端子８０は、厚さが一定の金属板によって構成されている。端子８０は、一枚の金属板に折り曲げ加工等を施すことで所定の形状に形成されている。したがって、天板部８１、立板部８２、突出板部８３、脚板部８４及び挟持板部８５は、厚さが一定の金属板によって構成された一体物である。なお、端子８０を構成する金属板の厚さは、例えば２ｍｍ以下である。端子８０を構成する金属板の厚さは、本実施の形態では０．６ｍｍである。 The terminal 80 is a conductive plate made of a conductive material such as a metal material. In this embodiment, terminal 80 is made of a copper alloy. The terminal 80 is made of a metal plate with a constant thickness. The terminal 80 is formed into a predetermined shape by bending a single metal plate. Therefore, the top plate portion 81, the standing plate portion 82, the protruding plate portion 83, the leg plate portion 84, and the clamping plate portion 85 are an integral body made of a metal plate having a uniform thickness. In addition, the thickness of the metal plate forming the terminal 80 is, for example, 2 mm or less. The thickness of the metal plate forming terminal 80 is 0.6 mm in this embodiment.
　図６に示すように、ブラシホルダ６０は、コンデンサ９０（第１のコンデンサ、第２のコンデンサ）が収納されるコンデンサ収納部６２（第１のコンデンサ収納部、第２のコンデンサ収納部）を有する。具体的には、コンデンサ収納部６２には、コンデンサ９０の本体部９１が収納されている。コンデンサ収納部６２は、コンデンサ９０が配置される配置スペースである。具体的には、コンデンサ収納部６２は、凹状に形成された凹部である。 As shown in FIG. 6, the brush holder 60 has a capacitor storage portion 62 (first capacitor storage portion, second capacitor storage portion) in which a capacitor 90 (first capacitor, second capacitor) is stored. . Specifically, the body portion 91 of the capacitor 90 is housed in the capacitor housing portion 62 . The capacitor housing portion 62 is an arrangement space in which the capacitor 90 is arranged. Specifically, the capacitor housing portion 62 is a recess formed in a concave shape.
　図５に示すように、ブラシホルダ６０には、２つのコンデンサ収納部６２（第１のコンデンサ収納部、第２のコンデンサ収納部）が形成されている。２つのコンデンサ９０（第１のコンデンサ、第２のコンデンサ）は、それぞれ２つのコンデンサ収納部６２に分けて配置されている。具体的には、２つのコンデンサ９０の一方の本体部９１は、２つのコンデンサ収納部６２の一方に収納されている。２つのコンデンサ９０の他方の本体部９１は、２つのコンデンサ収納部６２の他方に収納されている。 As shown in FIG. 5, the brush holder 60 is formed with two capacitor storage portions 62 (a first capacitor storage portion and a second capacitor storage portion). The two capacitors 90 (first capacitor, second capacitor) are arranged separately in two capacitor storage portions 62, respectively. Specifically, one body portion 91 of the two capacitors 90 is housed in one of the two capacitor housing portions 62 . The other body portion 91 of the two capacitors 90 is housed in the other of the two capacitor housing portions 62 .
　図６及び図７に示すように、ブラシホルダ６０は、端子８０が配置される端子配置部６３を有する。端子配置部６３は、端子８０の天板部８１が配置される配置面を含む。具体的には、端子配置部６３の配置面には、端子８０の天板部８１が面接触するように載置される。本実施の形態では、２つの端子８０（第１の端子、第２の端子）を用いている。したがって、ブラシホルダ６０には、２つの端子配置部６３が設けられている。 As shown in FIGS. 6 and 7, the brush holder 60 has a terminal placement portion 63 in which the terminals 80 are placed. Terminal placement portion 63 includes a placement surface on which top plate portion 81 of terminal 80 is placed. Specifically, the top plate portion 81 of the terminal 80 is placed in surface contact with the placement surface of the terminal placement portion 63 . In this embodiment, two terminals 80 (a first terminal and a second terminal) are used. Therefore, the brush holder 60 is provided with two terminal placement portions 63 .
　２つの端子配置部６３は、２つのコンデンサ収納部６２を挟む位置に設けられている。したがって、コンデンサ収納部６２とコンデンサ収納部６２に収納されたコンデンサ９０の本体部９１とは、２つの端子配置部６３の間に位置することになる。回転軸２１の軸心Ｃ方向において、コンデンサ収納部６２に収納されたコンデンサ９０の本体部９１は、端子配置部６３の配置面と、コンデンサ収納部６２の底面との間に位置している。したがって、コンデンサ９０の本体部９１は、端子配置部６３に配置された天板部８１よりも下方に位置することになる。 The two terminal placement portions 63 are provided at positions sandwiching the two capacitor storage portions 62 . Therefore, the capacitor housing portion 62 and the body portion 91 of the capacitor 90 housed in the capacitor housing portion 62 are positioned between the two terminal placement portions 63 . The body portion 91 of the capacitor 90 housed in the capacitor housing portion 62 is positioned between the arrangement surface of the terminal placement portion 63 and the bottom surface of the capacitor housing portion 62 in the direction of the axis C of the rotating shaft 21 . Therefore, the body portion 91 of the capacitor 90 is positioned below the top plate portion 81 arranged in the terminal placement portion 63 .
　各端子配置部６３には、端子８０の脚板部８４が挿入される挿入穴６３ａが形成されている。挿入穴６３ａは、一対の脚板部８４に対応して２つ形成されている。端子８０の脚板部８４は、挿入穴６３ａに圧入されることで固定される。 Each terminal placement portion 63 is formed with an insertion hole 63a into which the leg plate portion 84 of the terminal 80 is inserted. Two insertion holes 63 a are formed corresponding to the pair of leg plate portions 84 . The leg plate portion 84 of the terminal 80 is fixed by being press-fitted into the insertion hole 63a.
　ブラシホルダ６０は、端子配置部６３の配置面と段差を有するように形成された段差凹部６４を有する。段差凹部６４の底面は、端子配置部６３の配置面よりも一段下がった位置に存在する。段差凹部６４の底面は、コンデンサ収納部６２の底面よりも端子配置部６３側（上側）に位置している。 The brush holder 60 has a step recess 64 that is formed to have a step with respect to the placement surface of the terminal placement portion 63 . The bottom surface of the step recess 64 is positioned one step lower than the arrangement surface of the terminal arrangement portion 63 . The bottom surface of the step recess 64 is located on the terminal placement portion 63 side (upper side) than the bottom surface of the capacitor housing portion 62 .
　端子８０の一対の立板部８２のうちの内側に位置する立板部８２は、段差凹部６４の底面に向かって延在している。この内側の立板部８２と段差凹部６４の内側面との間には隙間が形成されている。つまり、内側の立板部８２と段差凹部６４の内側面とは接触していない。なお、内側の立板部８２と段差凹部６４の底面とは、接触していてもよいし、接触していなくてもよい。 Of the pair of standing plate portions 82 of the terminal 80 , the standing plate portion 82 located inside extends toward the bottom surface of the step recess 64 . A gap is formed between the inner upright plate portion 82 and the inner surface of the step recess 64 . In other words, the inner upright plate portion 82 and the inner surface of the step recess 64 are not in contact with each other. In addition, the inner upright plate portion 82 and the bottom surface of the step recess 64 may or may not be in contact with each other.
　一方、端子８０の一対の立板部８２のうちの外側に位置する立板部８２は、ブラシホルダ６０に形成された挿入穴６３ｂに挿入されている。なお、この外側の立板部８２と挿入穴６３ｂの内面及び底面とは、接触していてもよいし、接触していなくてもよい。 On the other hand, of the pair of standing plate portions 82 of the terminal 80 , the standing plate portion 82 located on the outer side is inserted into the insertion hole 63 b formed in the brush holder 60 . The outer upright plate portion 82 and the inner surface and the bottom surface of the insertion hole 63b may or may not be in contact with each other.
　端子配置部６３の下方には、電線１２０が挿通される電線挿通孔６５が形成されている。電線挿通孔６５は、回転軸２１の軸心Ｃと直交する方向に延在している。電線１２０は、電線挿通孔６５に挿通されて端子８０の一対の挟持板部８５に挟持される。 A wire insertion hole 65 through which the wire 120 is inserted is formed below the terminal placement portion 63 . The wire insertion hole 65 extends in a direction perpendicular to the axis C of the rotating shaft 21 . The electric wire 120 is inserted through the wire insertion hole 65 and held between the pair of holding plate portions 85 of the terminal 80 .
　ここで、端子８０とコンデンサ９０との接続構造について、図７を参照しつつ、図１１及び図１２を用いて説明する。図１１は、実施の形態に係る電動機１における端子８０とコンデンサ９０との接続構造の断面図である。図１２は、実施の形態に係る電動機１における端子８０とコンデンサ９０との接続構造の側断面図である。 Here, the connection structure between the terminal 80 and the capacitor 90 will be explained using FIGS. 11 and 12 while referring to FIG. FIG. 11 is a cross-sectional view of a connection structure between terminals 80 and capacitors 90 in electric motor 1 according to the embodiment. FIG. 12 is a side sectional view of a connection structure between terminals 80 and capacitors 90 in electric motor 1 according to the embodiment.
　図７に示すように、一対の端子８０の間に２つのコンデンサ９０が配置されている。各コンデンサ９０において、一対のリード９２（第１のリード、第２のリード）は、一対の端子８０に向けて折り曲げられている。この場合、各コンデンサ９０において、一対のリード９２の一方が一対の端子８０の一方に接続されている。各コンデンサ９０において、一対のリード９２の他方が一対の端子８０の他方に接続されている。したがって、各コンデンサ９０における一対のリード９２は、互いに離れる方向に向けて折り曲げられている。 As shown in FIG. 7, two capacitors 90 are arranged between a pair of terminals 80. In each capacitor 90 , a pair of leads 92 (first lead, second lead) are bent toward a pair of terminals 80 . In this case, in each capacitor 90 , one of the pair of leads 92 is connected to one of the pair of terminals 80 . In each capacitor 90 , the other of the pair of leads 92 is connected to the other of the pair of terminals 80 . Therefore, the pair of leads 92 in each capacitor 90 are bent away from each other.
　図７及び図１１に示すように、各コンデンサ９０における一対のリード９２は、各端子８０における一対の立板部８２のうちの内側に位置する立板部８２に接続されている。この場合、各コンデンサ９０における一対のリード９２は、天板部８１に対して立設する立板部８２に形成された挿通孔８６に挿通されている。したがって、一対のリード９２は、回転軸２１の軸心Ｃ方向（縦方向）ではなく、回転軸２１の軸心Ｃ方向に直交する方向（横方向）に延在することになる。つまり、一対のリード９２は、全体として天板部８１の主面に実質的に平行な方向に延在することになる。 As shown in FIGS. 7 and 11, the pair of leads 92 of each capacitor 90 are connected to the inner upright plate portion 82 of the pair of upright plate portions 82 of each terminal 80 . In this case, the pair of leads 92 of each capacitor 90 are inserted through insertion holes 86 formed in a standing plate portion 82 erected with respect to the top plate portion 81 . Therefore, the pair of leads 92 extend not in the direction of the axis C of the rotating shaft 21 (longitudinal direction) but in the direction perpendicular to the direction of the axis C of the rotating shaft 21 (lateral direction). In other words, the pair of leads 92 extends in a direction substantially parallel to the main surface of the top plate portion 81 as a whole.
　図１１及び図１２に示すように、１つの挿通孔８６には、２つのコンデンサ９０の各々のリード９２が挿通されている。２つのコンデンサ９０のリード９２は、１つの挿通孔８６において、上下方向（回転軸２１の軸心Ｃ方向）に重ねて配置されている。 As shown in FIGS. 11 and 12 , leads 92 of two capacitors 90 are inserted through one insertion hole 86 . The leads 92 of the two capacitors 90 are arranged one above the other in the vertical direction (in the direction of the axis C of the rotating shaft 21) in one insertion hole 86. As shown in FIG.
　なお、挿通孔８６の開口幅（スリット幅）は、コンデンサ９０のリード９２の線幅の１倍以上かつ２倍未満である。一例として、挿通孔８６の開口幅は、リード９２の線幅と同等である。 It should be noted that the opening width (slit width) of the insertion hole 86 is at least 1 time and less than 2 times the line width of the lead 92 of the capacitor 90 . As an example, the opening width of the insertion hole 86 is equivalent to the line width of the lead 92 .
　挿通孔８６に挿通されたコンデンサ９０のリード９２は、端子８０の立板部８２に接合されている。これにより、リード９２を立板部８２に固定することができる。図１１に示すように、リード９２と立板部８２とは、例えば、はんだ等の導電性接着剤１３０によって接合される。なお、リード９２と立板部８２とは、導電性接着剤１３０で接合するのではなく、かしめることで互いに接合してもよいし、かしめた上で導電性接着剤１３０によって接合してもよい。 The lead 92 of the capacitor 90 inserted through the insertion hole 86 is joined to the upright plate portion 82 of the terminal 80 . Thereby, the lead 92 can be fixed to the upright portion 82 . As shown in FIG. 11, the lead 92 and the upright portion 82 are joined by a conductive adhesive 130 such as solder. The lead 92 and the upright portion 82 may be joined together by caulking instead of being joined with the conductive adhesive 130, or may be joined with the conductive adhesive 130 after caulking. good.
　次に、端子８０とコンデンサ９０とをブラシホルダ６０に取り付けるときの取付方法について、図１３Ａ～図１３Ｆを用いて説明する。図１３Ａは、端子８０をブラシホルダ６０に取り付けるときの様子を示す図である。図１３Ｂは、端子８０をブラシホルダ６０に取り付けた後の状態を示す図である。図１３Ｃは、１つ目のコンデンサ９０をブラシホルダ６０に配置するときの様子を示す図である。図１３Ｄは、１つ目のコンデンサ９０の本体部９１をブラシホルダ６０のコンデンサ収納部６２に収納するときの様子を示す図である。図１３Ｅは、１つ目のコンデンサ９０の本体部９１をブラシホルダ６０のコンデンサ収納部６２に収納した後の状態を示す図である。図１３Ｆは、２つ目のコンデンサ９０を端子８０に接続した後の状態を示す図である。 Next, a method for attaching the terminal 80 and the capacitor 90 to the brush holder 60 will be described with reference to FIGS. 13A to 13F. 13A is a diagram showing how the terminal 80 is attached to the brush holder 60. FIG. 13B is a diagram showing a state after the terminal 80 is attached to the brush holder 60. FIG. 13C is a diagram showing how the first capacitor 90 is arranged in the brush holder 60. FIG. FIG. 13D is a diagram showing how the body portion 91 of the first capacitor 90 is housed in the capacitor housing portion 62 of the brush holder 60 . FIG. 13E is a diagram showing a state after the body portion 91 of the first capacitor 90 is housed in the capacitor housing portion 62 of the brush holder 60. FIG. 13F shows the state after connecting the second capacitor 90 to the terminal 80. FIG.
　まず、端子８０をブラシホルダ６０に取り付ける。本実施の形態では、２つの端子８０をブラシホルダ６０に取り付ける。 First, attach the terminal 80 to the brush holder 60 . In this embodiment, two terminals 80 are attached to the brush holder 60 .
　具体的には、図１３Ａに示すように、各端子８０について、天板部８１をブラシホルダ６０の端子配置部６３に載置させる。これとともに、端子８０の一対の立板部８２を挿入穴６３ｂ及び段差凹部６４に挿入し、且つ端子８０の一対の脚板部８４を一対の挿入穴６３ａに挿入させる。このとき、端子８０の一対の脚板部８４については、一対の挿入穴６３ａに圧入する。これにより、図１３Ｂに示すような状態で、端子８０をブラシホルダ６０に固定することができる。 Specifically, as shown in FIG. 13A , the top plate portion 81 of each terminal 80 is placed on the terminal placement portion 63 of the brush holder 60 . At the same time, the pair of upright plate portions 82 of the terminal 80 are inserted into the insertion hole 63b and the step recess 64, and the pair of leg plate portions 84 of the terminal 80 are inserted into the pair of insertion holes 63a. At this time, the pair of leg plate portions 84 of the terminal 80 are press-fitted into the pair of insertion holes 63a. Thereby, the terminal 80 can be fixed to the brush holder 60 in the state shown in FIG. 13B.
　次に、コンデンサ９０をブラシホルダ６０に配置する。具体的には、コンデンサ９０を一対の端子８０に接続させてブラシホルダ６０に配置する。本実施の形態では、２つのコンデンサ９０を配置している。 Next, the capacitor 90 is placed in the brush holder 60. Specifically, the capacitor 90 is connected to the pair of terminals 80 and arranged in the brush holder 60 . In this embodiment, two capacitors 90 are arranged.
　具体的には、図１３Ｃに示すように、１つ目のコンデンサ９０について、予め折り曲げておいた一対のリード９２をそれぞれ一対の端子８０の挿通孔８６に挿通させる。このとき、挿通孔８６は、立板部８２だけに形成されているのではなく、天板部８１から水平方向に突出する突出板部８３にまで連続して形成されている。つまり、挿通孔８６は、上面視で見える状態になっており、上方に向けて開口している。このため、コンデンサ９０を下に向けて移動させることで、コンデンサ９０の一対のリード９２をそれぞれ一対の端子８０の挿通孔８６に上から差し込んで挿通孔８６に挿通させることができる。 Specifically, as shown in FIG. 13C, for the first capacitor 90, a pair of pre-bent leads 92 are inserted into the insertion holes 86 of the pair of terminals 80, respectively. At this time, the insertion hole 86 is not formed only in the upright plate portion 82 but is formed continuously from the top plate portion 81 to the protruding plate portion 83 that protrudes in the horizontal direction. In other words, the insertion hole 86 is visible in a top view and is open upward. Therefore, by moving the capacitor 90 downward, the pair of leads 92 of the capacitor 90 can be inserted into the insertion holes 86 of the pair of terminals 80 from above, respectively.
　コンデンサ９０のリード９２が端子８０の立板部８２に形成された挿通孔８６の奥にまで到達したら、図１３Ｄに示すように、挿通孔８６の奥の立板部８２とリード９２との接触部を支点として、コンデンサ９０の本体部９１を回転させる。具体的には、本体部９１を外側（図１３Ｄの手前側）に回転させる。これにより、図１３Ｅに示すように、コンデンサ９０の本体部９１を、ブラシホルダ６０のコンデンサ収納部６２に収納させることができる。具体的には、コンデンサ９０の本体部９１は、２つのコンデンサ収納部６２のうちの外側（手前側）のコンデンサ収納部６２に収納される。このようにして、１つ目のコンデンサ９０を一対の端子８０に接続させてブラシホルダ６０にセットすることができる。 When the lead 92 of the capacitor 90 reaches the back of the insertion hole 86 formed in the upright plate portion 82 of the terminal 80, as shown in FIG. The body portion 91 of the capacitor 90 is rotated with the portion as a fulcrum. Specifically, the body portion 91 is rotated outward (front side in FIG. 13D). Thereby, as shown in FIG. 13E, the body portion 91 of the capacitor 90 can be housed in the capacitor housing portion 62 of the brush holder 60 . Specifically, the body portion 91 of the capacitor 90 is housed in the outer (front side) capacitor housing portion 62 of the two capacitor housing portions 62 . In this manner, the first capacitor 90 can be connected to the pair of terminals 80 and set in the brush holder 60 .
　次に、２つ目のコンデンサ９０をブラシホルダ６０に配置する。具体的には、図１３Ｆに示すように、１つ目のコンデンサ９０と同様にして、２つ目のコンデンサ９０を一対の端子８０に接続させてブラシホルダ６０にセットする。 Next, place the second capacitor 90 on the brush holder 60 . Specifically, as shown in FIG. 13F , the second capacitor 90 is connected to the pair of terminals 80 and set in the brush holder 60 in the same manner as the first capacitor 90 .
　なお、２つ目のコンデンサ９０のリード９２については、１つ目のコンデンサ９０のリード９２が挿通された挿通孔８６に挿通することになるので、１つ目のコンデンサ９０のリード９２の上に積み重なる。本実施の形態では、２つ目のコンデンサ９０の本体部９１は、２つのコンデンサ収納部６２に分けて配置される。したがって、２つ目のコンデンサ９０の本体部９１をコンデンサ収納部６２に収納するときは、２つ目のコンデンサ９０の本体部９１を１つ目のコンデンサ９０の本体部９１とは逆向き（図１３Ｆの奥側）に回転させる。これにより、２つ目のコンデンサ９０の本体部９１は、２つのコンデンサ収納部６２のうちの内側（奥側）のコンデンサ収納部６２に収納される。 The lead 92 of the second capacitor 90 is inserted through the insertion hole 86 through which the lead 92 of the first capacitor 90 is inserted. pile up. In this embodiment, the body portion 91 of the second capacitor 90 is divided into two capacitor storage portions 62 and arranged. Therefore, when housing the body portion 91 of the second capacitor 90 in the capacitor housing portion 62, the body portion 91 of the second capacitor 90 is placed in the opposite direction to the body portion 91 of the first capacitor 90 (Fig. 13F back side). As a result, the body portion 91 of the second capacitor 90 is accommodated in the inner (back side) capacitor accommodating portion 62 of the two capacitor accommodating portions 62 .
　２つ目のコンデンサ９０をブラシホルダ６０に配置した後は、端子８０の挿通孔８６に挿通された２つのコンデンサ９０の各々のリード９２と端子８０の立板部８２とを導電性接着剤１３０で接合する。本実施の形態では、導電性接着剤１３０としてはんだを用いている。 After the second capacitor 90 is placed in the brush holder 60, the leads 92 of the two capacitors 90 inserted through the insertion holes 86 of the terminals 80 and the upright portions 82 of the terminals 80 are bonded with the conductive adhesive 130. Join with In this embodiment, solder is used as the conductive adhesive 130 .
　これにより、図１１に示すように、一対の挿通孔８６の各々に挿通された２本のリード９２と立板部８２とがはんだにより接合され、２つのコンデンサ９０が一対の端子８０に固定される。 As a result, as shown in FIG. 11, the two leads 92 inserted through the pair of insertion holes 86 and the upright plate portion 82 are joined by soldering, and the two capacitors 90 are fixed to the pair of terminals 80. be.
　このように、立板部８２とリード９２とをはんだで接合することで、各立板部８２には、はんだフィレットが形成される。この場合、立板部８２は天板部８１の側方に位置している。このため、横向きに溶融はんだを塗布することになる。これにより、図１１に示すように、はんだフィレットが横向きに形成される。具体的には、はんだフィレットは、立板部８２の外側の面に形成される。なお、はんだを塗布した時に、はんだが挿通孔８６を通って立板部８２の内側の面に到達することがある。これにより、立板部８２の内側にバックフィレットも形成されることがある。 By joining the upright plate portions 82 and the leads 92 with solder in this way, solder fillets are formed in each upright plate portion 82 . In this case, the upright plate portion 82 is positioned on the side of the top plate portion 81 . Therefore, the molten solder is applied laterally. As a result, a solder fillet is formed horizontally as shown in FIG. Specifically, the solder fillet is formed on the outer surface of the upright plate portion 82 . When solder is applied, the solder may pass through the insertion hole 86 and reach the inner surface of the upright plate portion 82 . As a result, a back fillet may also be formed inside the upright plate portion 82 .
　立板部８２とリード９２とをはんだで接合する際、溶融したはんだがブラシホルダ６０に垂れるおそれがある。しかしながら、本実施の形態では、ブラシホルダ６０が高耐熱樹脂であるフェノール樹脂で構成されているので、仮に溶融したはんだがブラシホルダ６０に垂れたとしても、そのはんだによってブラシホルダ６０は溶けない。 When the upright plate portion 82 and the lead 92 are joined by soldering, the molten solder may drip onto the brush holder 60 . However, in the present embodiment, since the brush holder 60 is made of phenolic resin, which is a highly heat-resistant resin, even if melted solder drips onto the brush holder 60, the solder does not melt the brush holder 60.
　なお、リード９２と立板部８２とを導電性接着剤１３０のみによって接合しているが、リード９２と立板部８２とを導電性接着剤１３０によって接合する前に、リード９２と立板部８２とをかしめてもよい。このように、かしめと導電性接着剤１３０との両方でリード９２と立板部８２とを接合することで、コンデンサ９０と端子８０との接合性を向上させることができる。 Although the lead 92 and the upright plate portion 82 are bonded only with the conductive adhesive 130, the lead 92 and the upright plate portion 82 are not bonded together before the lead 92 and the upright plate portion 82 are bonded with the conductive adhesive 130. 82 may be crimped. By joining the lead 92 and the upright plate portion 82 with both the caulking and the conductive adhesive 130 in this way, the bondability between the capacitor 90 and the terminal 80 can be improved.
　以上説明したように、本実施の形態に係る電動機１によれば、コンデンサ９０が接続される端子８０が天板部８１と天板部８１に対して立設する立板部８２とを有している。立板部８２には、コンデンサ９０のリード９２が挿通される挿通孔８６が形成されている。 As described above, according to the electric motor 1 according to the present embodiment, the terminal 80 to which the capacitor 90 is connected has the top plate portion 81 and the standing plate portion 82 erected with respect to the top plate portion 81 . ing. An insertion hole 86 through which the lead 92 of the capacitor 90 is inserted is formed in the upright plate portion 82 .
　この構成により、コンデンサ９０のリード９２を上下方向ではなく横方向に延在させることができる。つまり、コンデンサ９０のリード９２を、回転軸２１の軸心Ｃ方向ではなく、回転軸２１の軸心Ｃに直交する方向に延在させることができる。これにより、リード付き部品であるコンデンサ９０を内部に収納したとしても、電動機１の高さ（厚み）が大きくなることを抑制できる。したがって、電動機１を薄型化することができる。 This configuration allows the leads 92 of the capacitor 90 to extend laterally rather than vertically. That is, the lead 92 of the capacitor 90 can be extended in a direction orthogonal to the axis C of the rotation shaft 21 instead of in the direction of the axis C of the rotation shaft 21 . As a result, even if the capacitor 90, which is a component with leads, is housed inside, it is possible to prevent the height (thickness) of the electric motor 1 from increasing. Therefore, the electric motor 1 can be made thinner.
　特に、リード９２と立板部８２とをはんだ等の導電性接着剤１３０よって接合したとしても、導電性接着剤１３０のフィレットが縦向きではなく横向きに形成される。したがって、フィレットによって電動機１の高さが高くなることを抑制できる。 In particular, even if the lead 92 and the upright portion 82 are joined with a conductive adhesive 130 such as solder, the fillet of the conductive adhesive 130 is formed horizontally instead of vertically. Therefore, it is possible to prevent the height of the electric motor 1 from increasing due to the fillet.
　このように、本実施の形態に係る電動機１によれば、もともとＥＭＣ（Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃ　Ｃｏｍｐａｔｉｂｉｌｉｔｙ）に対する堅牢性が高い整流子モータに、さらにノイズ低減用のコンデンサ９０を搭載したとしても、モータの薄型化を図ることができる。つまり、ＥＭＣ対策と薄型化との両立を図ることができる。しかも、本実施の形態に係る電動機１は、コアレスであるのでインダクタンスが低い。このため、インダクタンスが低くかつ低減したいノイズに合わせてコンデンサ９０の容量選定ができるＥＭＣに対する堅牢性が高い薄型の電動機１を実現することができる。 As described above, according to the electric motor 1 according to the present embodiment, even if the commutator motor, which is originally highly robust against EMC (Electromagnetic Compatibility), is further equipped with the capacitor 90 for noise reduction, the thickness of the motor can be reduced. can be planned. In other words, it is possible to achieve both EMC countermeasures and thinning. Moreover, since the electric motor 1 according to the present embodiment is coreless, the inductance is low. Therefore, it is possible to realize a thin electric motor 1 having low inductance and high robustness against EMC, in which the capacity of the capacitor 90 can be selected according to the noise to be reduced.
　また、本実施の形態に係る電動機１は、整流子と、整流子に接するブラシ４０と、ブラシ４０を保持するとともに、コンデンサ収納部６２を有するブラシホルダ６０と、ブラシ４０に電気的に接続された端子８０と、コンデンサ収納部６２に収納される本体部９１と、前記本体部９１から引き出されたリード９２と、を有するコンデンサ９０と、を備えている。端子８０は、天板部８１と、天板部８１に対して立設する立板部８２とを有する。立板部８２には、リード９２が挿通される挿通孔８６が形成されている。 Further, the electric motor 1 according to the present embodiment includes a commutator, a brush 40 in contact with the commutator, a brush holder 60 that holds the brush 40 and has a capacitor storage portion 62 , and a brush holder 60 that is electrically connected to the brush 40 . a body portion 91 housed in the capacitor housing portion 62; and leads 92 drawn out from the body portion 91. The terminal 80 has a top plate portion 81 and an upright plate portion 82 erected with respect to the top plate portion 81 . An insertion hole 86 through which the lead 92 is inserted is formed in the upright plate portion 82 .
　これにより、コンデンサ等のリード付き電子部品を内部に収納したとしても薄型化することができる電動機を実現することができる。 As a result, it is possible to realize a motor that can be made thinner even if electronic components with leads such as capacitors are housed inside.
　また、本実施の形態に係る電動機１において、端子８０は、上面視において、天板部８１から外方に向けて突出する突出板部８３を有し、立板部８２は、突出板部８３の外側端部から垂下するように形成されている。端子８０の挿通孔８６は、立板部８２から突出板部８３にわたって連続して形成されている。 Further, in the electric motor 1 according to the present embodiment, the terminal 80 has a protruding plate portion 83 that protrudes outward from the top plate portion 81 when viewed from above, and the upright plate portion 82 has the protruding plate portion 83 depending from the outer end of the The insertion hole 86 of the terminal 80 is formed continuously from the upright plate portion 82 to the projecting plate portion 83 .
　これにより、コンデンサ９０を天板部８１の方向（下方向）に向けて移動させるだけで、コンデンサ９０のリード９２を挿通孔８６に挿通させることができる。したがって、コンデンサ９０を端子８０に容易に接続させることができる。 Accordingly, the leads 92 of the capacitor 90 can be inserted through the insertion holes 86 simply by moving the capacitor 90 toward the top plate portion 81 (downward). Therefore, capacitor 90 can be easily connected to terminal 80 .
　また、本実施の形態に係る電動機１において、ブラシホルダ６０は、天板部８１が配置される配置面を含む端子配置部６３を有する。コンデンサ９０の本体部９１は、端子配置部６３の配置面と、コンデンサ９０の本体部９１が収納されるコンデンサ収納部６２の底面との間に位置している。 Further, in the electric motor 1 according to the present embodiment, the brush holder 60 has the terminal placement portion 63 including the placement surface on which the top plate portion 81 is placed. The body portion 91 of the capacitor 90 is positioned between the arrangement surface of the terminal placement portion 63 and the bottom surface of the capacitor housing portion 62 in which the body portion 91 of the capacitor 90 is housed.
　この構成により、コンデンサ９０の本体部９１は、端子８０の天板部８１よりも下方に位置することになるので、コンデンサ９０を搭載することで電動機１の高さが高くなることを効果的に抑制することができる。しかも、コンデンサ９０の本体部９１は、コンデンサ９０のリード９２と端子８０との接合部分も天板部８１よりも下方に位置することになる。言い換えると、電動機１は、天板部８１の下方でリード９２と端子８０とを接合する構造を有する。これにより、コンデンサ９０のリード９２と端子８０との接合構造によって電動機１の高さが高くなることを効果的に抑制することができる。 With this configuration, the main body portion 91 of the capacitor 90 is positioned below the top plate portion 81 of the terminal 80, so mounting the capacitor 90 effectively reduces the height of the electric motor 1. can be suppressed. Moreover, in the main body portion 91 of the capacitor 90 , the connecting portion between the lead 92 of the capacitor 90 and the terminal 80 is also positioned below the top plate portion 81 . In other words, the electric motor 1 has a structure in which the leads 92 and the terminals 80 are joined under the top plate portion 81 . As a result, it is possible to effectively prevent the height of the electric motor 1 from increasing due to the joint structure between the leads 92 of the capacitor 90 and the terminals 80 .
　また、本実施の形態に係る電動機１において、ブラシホルダ６０は、端子配置部６３の配置面と段差を有するように形成された段差凹部６４を有する。端子８０の立板部８２は、段差凹部６４の底面に向かって延在している。 In addition, in the electric motor 1 according to the present embodiment, the brush holder 60 has a step recess 64 formed to have a step with respect to the placement surface of the terminal placement portion 63 . The upright plate portion 82 of the terminal 80 extends toward the bottom surface of the step recess 64 .
　この構成により、コンデンサ９０のリード９２を、立板部８２の部分に存在する挿通孔８６に容易に挿通させることができる。 With this configuration, the leads 92 of the capacitor 90 can be easily inserted through the insertion holes 86 present in the upright plate portion 82 .
　また、本実施の形態に係る電動機１において、端子８０の立板部８２とブラシホルダ６０の段差凹部６４の内側面との間に隙間が形成されている。 Also, in the electric motor 1 according to the present embodiment, a gap is formed between the upright plate portion 82 of the terminal 80 and the inner surface of the stepped recess portion 64 of the brush holder 60 .
　この構成により、コンデンサ９０のリード９２を立板部８２の部分に存在する挿通孔８６に挿通させたときに、立板部８２と段差凹部６４の内側面との隙間に、挿通孔８６に挿通させたリード９２の先端部を配置させることができる。したがって、リード９２を横向きに延在させて挿通孔８６に挿通させたとしても、リード９２の先端部が邪魔になることを抑制できる。 With this configuration, when the lead 92 of the capacitor 90 is inserted through the insertion hole 86 existing in the upright plate portion 82 , the lead 92 is inserted through the insertion hole 86 in the gap between the upright plate portion 82 and the inner side surface of the step recess 64 . The tip of the lead 92 can be arranged. Therefore, even if the lead 92 extends laterally and is inserted through the insertion hole 86, the leading end of the lead 92 can be prevented from becoming an obstacle.
　また、本実施の形態に係る電動機１において、電動機１は、端子８０を２つ有し、コンデンサ９０は、リード９２を２つ有し、２つのリード９２の一方は、２つの端子８０の一方に接続され、２つのリード９２の他方は、２つの端子８０の他方に接続されている。 Also, in the electric motor 1 according to the present embodiment, the electric motor 1 has two terminals 80 , the capacitor 90 has two leads 92 , and one of the two leads 92 is one of the two terminals 80 . , and the other of the two leads 92 is connected to the other of the two terminals 80 .
　この構成により、２つの端子８０にコンデンサ９０を並列接続することができる。したがって、コンデンサ９０によってノイズを効果的に低減することができる。 With this configuration, the capacitor 90 can be connected in parallel to the two terminals 80 . Therefore, the capacitor 90 can effectively reduce noise.
　また、本実施の形態に係る電動機１において、コンデンサ９０を２つ有し、端子８０の挿通孔８６には、２つのコンデンサ９０の各々のリード９２が挿通されている。 Also, the electric motor 1 according to the present embodiment has two capacitors 90 , and the lead 92 of each of the two capacitors 90 is inserted through the insertion hole 86 of the terminal 80 .
　この構成により、２つのコンデンサ９０を用いたとしても電動機１の高さが高くなることを抑制できる。また、２つのコンデンサ９０によってノイズをさらに効果的に低減することができる。しかも、２つのコンデンサ９０の各々のリード９２が１つの挿通孔８６に挿通されている。したがって、２つのコンデンサ９０を用いたとしても、端子８０と２つのコンデンサ９０のリード９２との接合は、１つのコンデンサ９０のリード９２と端子８０との接合する場合と同様にして行うことができる。 With this configuration, even if two capacitors 90 are used, it is possible to prevent the height of the electric motor 1 from increasing. Also, the two capacitors 90 can reduce noise more effectively. Moreover, the leads 92 of each of the two capacitors 90 are inserted through one insertion hole 86 . Therefore, even if two capacitors 90 are used, the connection between the terminals 80 and the leads 92 of the two capacitors 90 can be performed in the same manner as the connection between the leads 92 of one capacitor 90 and the terminals 80. .
　また、本実施の形態に係る電動機１において、ブラシホルダ６０は、コンデンサ収納部６２を少なくとも２つ有する。２つのコンデンサ９０の一方の本体部９１は、２つのコンデンサ収納部６２の一方に収納されている。２つのコンデンサ９０の他方の本体部９１は、２つのコンデンサ収納部６２の他方に収納されている。 Also, in the electric motor 1 according to the present embodiment, the brush holder 60 has at least two capacitor storage portions 62 . One body portion 91 of the two capacitors 90 is housed in one of the two capacitor housing portions 62 . The other body portion 91 of the two capacitors 90 is housed in the other of the two capacitor housing portions 62 .
　この構成により、２つのコンデンサ９０を２つのコンデンサ収納部６２に分けて配置することができる。したがって、２つのコンデンサ９０を用いたとしても電動機１の高さが高くなることを抑制できる。 With this configuration, the two capacitors 90 can be divided and arranged in the two capacitor housing portions 62 . Therefore, even if two capacitors 90 are used, it is possible to prevent the height of electric motor 1 from increasing.
　（変形例）
　以上、本開示に係る電動機１について、実施の形態に基づいて説明したが、本開示は、上記実施の形態に限定されるものではない。 (Modification)
As described above, the electric motor 1 according to the present disclosure has been described based on the embodiment, but the present disclosure is not limited to the above embodiment.
　例えば、上記実施の形態において、２つのコンデンサ９０は、ブラシホルダ６０における２つのコンデンサ収納部６２に分けて配置されている。しかし、これに限らない。具体的には、図１４に示される電動機１Ａのように、２つのコンデンサ９０は、ブラシホルダ６０における２つのコンデンサ収納部６２の一方のみに配置されていてもよい。図１４は、変形例１に係る電動機１Ａにおいて、各種部品が取り付けられたブラシホルダ６０の構成を示す斜視図である。つまり、２つのコンデンサ９０の各々の本体部９１は、１つのコンデンサ収納部６２に収納されていてもよい。 For example, in the above embodiment, the two capacitors 90 are arranged separately in the two capacitor storage portions 62 in the brush holder 60 . However, it is not limited to this. Specifically, the two capacitors 90 may be arranged in only one of the two capacitor storage portions 62 in the brush holder 60, as in the electric motor 1A shown in FIG. FIG. 14 is a perspective view showing a configuration of a brush holder 60 to which various parts are attached in an electric motor 1A according to Modification 1. As shown in FIG. In other words, the body portion 91 of each of the two capacitors 90 may be housed in one capacitor housing portion 62 .
　また、上記実施の形態では、一対の端子８０の間に２つのコンデンサ９０を並列接続した。しかし、これに限らない。例えば、図１５及び図１６に示される電動機１Ｂのように、一対の端子８０の間に１つのみのコンデンサ９０を並列接続してもよい。図１５は、変形例２に係る電動機１Ｂにおいて、各種部品が取り付けられたブラシホルダ６０の構成を示す斜視図である。図１６は、変形例２に係る電動機１Ｂの断面図である。この場合、図１６に示すように、１つのコンデンサ９０は、ブラシホルダ６０における２つのコンデンサ収納部６２のうちの一方に収納されている。なお、一対の端子８０の間に３つ以上の複数のコンデンサ９０を並列接続してもよい。 Also, in the above embodiment, two capacitors 90 are connected in parallel between the pair of terminals 80 . However, it is not limited to this. For example, like the electric motor 1B shown in FIGS. 15 and 16, only one capacitor 90 may be connected in parallel between a pair of terminals 80. FIG. FIG. 15 is a perspective view showing the configuration of a brush holder 60 to which various parts are attached in an electric motor 1B according to Modification 2. As shown in FIG. FIG. 16 is a cross-sectional view of an electric motor 1B according to Modification 2. As shown in FIG. In this case, as shown in FIG. 16, one capacitor 90 is housed in one of the two capacitor housing portions 62 in the brush holder 60. As shown in FIG. Note that three or more capacitors 90 may be connected in parallel between the pair of terminals 80 .
　また、図１７に示すように、コンデンサ９０の本体部９１が収納された２つのコンデンサ収納部６２の各々に、本体部９１の少なくとも一部を覆うようにシール剤１４０が形成されていてもよい。図１７は、変形例３に係る電動機の拡大断面図である。これにより、コンデンサ９０の接触を少なくしつつ、少ない塗布量でシール剤１４０を形成することができる。また、図１８に示すように、コンデンサ９０が１つのみの場合は、本体部９１が収納されたコンデンサ収納部６２のみにシール剤１４０を形成すればよい。図１８は、変形例４に係る電動機の拡大断面図である。また、図示しないが、１つのコンデンサ収納部６２に２つのコンデンサ９０が収納されている場合にも、２つの本体部９１が収納されたコンデンサ収納部６２のみにシール剤１４０を形成すればよい。これにより、１回の塗布で２つの本体部９１をシール剤１４０で覆うことができる。シール剤１４０は、例えば、シリコーン等の樹脂材料を主成分とする絶縁性樹脂材料によって構成されている。シール剤１４０は、液状の絶縁性樹脂材料をコンデンサ収納部６２に塗布して固化すること形成することができる。なお、シール剤１４０は、本体部９１の全体が埋め込まれるようにコンデンサ収納部６２に充填されていてもよい。 Further, as shown in FIG. 17 , a sealant 140 may be formed in each of the two capacitor housing portions 62 housing the body portion 91 of the capacitor 90 so as to cover at least a portion of the body portion 91 . . FIG. 17 is an enlarged cross-sectional view of an electric motor according to Modification 3. FIG. As a result, the sealant 140 can be formed with a small amount of application while reducing contact with the capacitor 90 . Also, as shown in FIG. 18, when there is only one capacitor 90, the sealing agent 140 may be formed only in the capacitor accommodating portion 62 in which the body portion 91 is accommodated. FIG. 18 is an enlarged cross-sectional view of an electric motor according to Modification 4. FIG. Also, although not shown, when two capacitors 90 are housed in one capacitor housing portion 62, the sealant 140 may be formed only in the capacitor housing portion 62 housing the two body portions 91. As a result, the two main body portions 91 can be covered with the sealant 140 by applying the sealant 140 once. The sealant 140 is made of, for example, an insulating resin material whose main component is a resin material such as silicone. The sealing agent 140 can be formed by applying a liquid insulating resin material to the capacitor housing portion 62 and solidifying it. Note that the sealing agent 140 may be filled in the capacitor accommodating portion 62 so that the entire body portion 91 is embedded.
　また、上記実施の形態において、２つのコンデンサ９０におけるリード９２は、端子８０の立板部８２における挿通孔８６において上下方向に重ねて配置されていた。しかし、これに限らない。例えば、２つのコンデンサ９０におけるリード９２は、挿通孔８６において左右横並びで配置されていてもよい。この場合、挿通孔８６の開口幅は、リード９２の線幅の２倍以上である。 Also, in the above-described embodiment, the leads 92 of the two capacitors 90 are stacked vertically in the insertion holes 86 of the upright plate portions 82 of the terminals 80 . However, it is not limited to this. For example, the leads 92 of the two capacitors 90 may be arranged side by side in the insertion hole 86 . In this case, the opening width of the insertion hole 86 is at least twice the line width of the lead 92 .
　また、上記実施の形態において、電動機１は、軸受け１００を１つのみ備えていた。しかし、これに限らない。例えば、電動機１は、２つの軸受けを備えていてもよい。この場合、例えば、２つの軸受けの一方を回転軸２１の第１端部２１ａに取り付け、２つの軸受けの一方を回転軸２１の第２端部２１ｂに取り付けることができる。 Also, in the above embodiment, the electric motor 1 has only one bearing 100 . However, it is not limited to this. For example, the electric motor 1 may have two bearings. In this case, for example, one of the two bearings can be attached to the first end 21 a of the rotating shaft 21 and one of the two bearings can be attached to the second end 21 b of the rotating shaft 21 .
　また、上記実施の形態において、電動機１は、固定子１０及び回転子２０がコアを有していないコアレスモータであった。しかし、これに限らない。例えば、電動機１は、固定子１０及び回転子２０がコアを有する電動機であってもよい。 Also, in the above embodiment, the electric motor 1 is a coreless motor in which the stator 10 and the rotor 20 do not have cores. However, it is not limited to this. For example, the electric motor 1 may be an electric motor in which the stator 10 and the rotor 20 have cores.
　また、上記実施の形態において、固定子１０は、永久磁石のみによって構成されていた。しかし、これに限らない。例えば、固定子１０は、永久磁石と鉄心とによって構成された固定子であってもよいし、永久磁石を用いずに固定子巻線と鉄心とからなる電機子であってもよい。 Also, in the above embodiment, the stator 10 is composed only of permanent magnets. However, it is not limited to this. For example, the stator 10 may be a stator composed of permanent magnets and an iron core, or an armature composed of stator windings and an iron core without using permanent magnets.
　また、上記実施の形態において、電動機１は、厚みが外径より小さい外形サイズの扁平型のフラットモータであった。しかし、これに限らない。本開示の技術は、例えば、厚みが外径よりも大きい外形サイズの円筒状の筐体を有する寸胴型の電動機等にも適用することができる。 In addition, in the above embodiment, the electric motor 1 is a flat motor with an outer shape whose thickness is smaller than its outer diameter. However, it is not limited to this. The technology of the present disclosure can also be applied to, for example, a cylindrical electric motor having a cylindrical housing with an outer size whose thickness is greater than its outer diameter.
　また、上記実施の形態において、固定子１０及び回転子２０が発生する主磁束の向きは、回転軸２１の軸心Ｃ方向である。しかし、これに限らない。具体的には、固定子１０及び回転子２０が発生する主磁束の向きは、回転軸２１の軸心Ｃ方向と直交する方向（回転軸２１の回転の径方向）であってもよい。例えば、本開示の技術は、回転子２０が固定子１０の内側に配置されたインナーロータ型のモータに適用することもできる。 Also, in the above embodiment, the direction of the main magnetic flux generated by the stator 10 and the rotor 20 is the direction of the axis C of the rotating shaft 21 . However, it is not limited to this. Specifically, the direction of the main magnetic flux generated by the stator 10 and the rotor 20 may be a direction orthogonal to the axial center C direction of the rotating shaft 21 (radial direction of rotation of the rotating shaft 21). For example, the technology of the present disclosure can also be applied to an inner rotor type motor in which the rotor 20 is arranged inside the stator 10 .
　また、上記実施の形態において、電動機１は、車両に用いられる車両用モータである。しかし、これに限らない。本開示の技術は、例えば、電気掃除機等に搭載される電動送風機等に用いられる電動機など、その他の種々の電気機器に用いられる電動機にも適用することができる。 Also, in the above embodiment, the electric motor 1 is a vehicle motor used in a vehicle. However, it is not limited to this. The technology of the present disclosure can also be applied to electric motors used in various other electric devices, such as electric motors used in electric blowers and the like mounted on electric vacuum cleaners and the like.
　また、上記実施の形態において、端子８０は、コンデンサ９０が接続される部品として説明した。しかし、これに限らない。つまり、端子８０は、コンデンサ９０以外のリード付き電子部品が接続される部品として用いられてもよい。この場合、リード付き電子部品のリードは、端子８０の立板部８２の挿通孔８６に挿通される。 Also, in the above embodiment, the terminal 80 has been described as a component to which the capacitor 90 is connected. However, it is not limited to this. That is, the terminal 80 may be used as a component to which an electronic component with leads other than the capacitor 90 is connected. In this case, the leads of the leaded electronic component are inserted through the insertion holes 86 of the upright plate portion 82 of the terminal 80 .
　その他、上記実施の形態に対して当業者が思い付く各種変形を施して得られる形態、又は、本開示の趣旨を逸脱しない範囲で実施の形態における構成要素及び機能を任意に組み合わせることで実現される形態も本開示に含まれる。 In addition, forms obtained by applying various modifications that a person skilled in the art can think of to the above embodiments, or realized by arbitrarily combining the components and functions in the embodiments within the scope of the present disclosure Forms are also included in this disclosure.
　本開示の技術は、自動車等の電装分野及び家庭用電気機器分野の製品をはじめとして、電動機が搭載される種々の製品に広く利用することができる。 The technology of the present disclosure can be widely used in various products equipped with electric motors, including products in the field of electric equipment such as automobiles and the field of household electric appliances.
　１、１Ａ、１Ｂ　電動機
　１０　固定子
　２０　回転子
　２１　回転軸
　２１ａ　第１端部
　２１ｂ　第２端部
　２２　コイル
　２３　モールド樹脂
　３０　整流子
　３１　整流子片
　４０　ブラシ
　５０　ブラシバネ
　５０ａ　渦巻部
　６０　ブラシホルダ
　６１　ブラシ収納部
　６２　コンデンサ収納部（第１のコンデンサ収納部、第２のコンデンサ収納部）
　６３　端子配置部
　６３ａ、６３ｂ　挿入穴
　６４　段差凹部
　６５　電線挿通孔
　７０　カバープレート
　８０　端子（第１の端子、第２の端子）
　８１　天板部
　８２　立板部
　８３　突出板部
　８４　脚板部
　８５　挟持板部
　８６、８６ａ、８６ｂ　挿通孔
　９０　コンデンサ（第１のコンデンサ、第２のコンデンサ）
　９１　本体部
　９２、９２ａ、９２ｂ　リード（第１のリード、第２のリード）
　１００　軸受け
　１１１　第１ブラケット
　１１２　第２ブラケット
　１２０　電線
　１３０　導電性接着剤
　１４０　シール剤 Reference Signs List 1, 1A, 1B Electric motor 10 Stator 20 Rotor 21 Rotating shaft 21a First end 21b Second end 22 Coil 23 Molded resin 30 Commutator 31 Commutator piece 40 Brush 50 Brush spring 50a Spiral part 60 Brush holder 61 Brush housing Part 62 capacitor storage part (first capacitor storage part, second capacitor storage part)
63 Terminal placement portion 63a, 63b Insertion hole 64 Step recess 65 Wire insertion hole 70 Cover plate 80 Terminal (first terminal, second terminal)
81 Top plate portion 82 Standing plate portion 83 Protruding plate portion 84 Leg plate portion 85 Clamping plate portion 86, 86a, 86b Insertion hole 90 Capacitor (first capacitor, second capacitor)
91 main body 92, 92a, 92b leads (first lead, second lead)
Reference Signs List 100 bearing 111 first bracket 112 second bracket 120 electric wire 130 conductive adhesive 140 sealant

Claims (10)

  1. 　整流子と、
    　前記整流子に接するブラシと、
    　前記ブラシを保持するとともに、コンデンサ収納部を有するブラシホルダと、
    　前記ブラシに電気的に接続された端子と、
    　前記コンデンサ収納部に収納される本体部と、前記本体部から引き出されたリードと、を有するコンデンサと、を備え、
    　前記端子は、天板部と、前記天板部に対して立設する立板部とを有し、
    　前記立板部には、前記リードが挿通される挿通孔が形成されている、
    　電動機。     a commutator;
    a brush in contact with the commutator;
    a brush holder that holds the brush and has a capacitor housing;
    a terminal electrically connected to the brush;
    a capacitor having a body portion housed in the capacitor housing portion and leads drawn out from the body portion;
    The terminal has a top plate portion and a standing plate portion erected with respect to the top plate portion,
    An insertion hole through which the lead is inserted is formed in the upright plate,
    Electric motor.
  2. 　前記端子は、上面視において、前記天板部から外方に向けて突出する突出板部を有し、
    　前記立板部は、前記突出板部の外側端部から垂下するように形成されており、
    　前記挿通孔は、前記立板部から前記突出板部にわたって連続して形成されている、
    　請求項１に記載の電動機。     The terminal has a protruding plate portion that protrudes outward from the top plate portion when viewed from above,
    The upright plate portion is formed to hang down from an outer end portion of the projecting plate portion,
    The insertion hole is formed continuously from the upright plate portion to the projecting plate portion,
    The electric motor according to claim 1.
  3. 　前記ブラシホルダは、前記天板部が配置される配置面を含む端子配置部を有し、
    　前記コンデンサの前記本体部は、前記配置面と、前記コンデンサ収納部の底面との間に位置している、
    　請求項１又は２に記載の電動機。     The brush holder has a terminal placement portion including a placement surface on which the top plate portion is placed,
    the body portion of the capacitor is positioned between the placement surface and the bottom surface of the capacitor housing portion;
    The electric motor according to claim 1 or 2.
  4. 　前記ブラシホルダは、前記配置面と段差を有するように形成された凹部を有し、
    　前記立板部は、前記凹部の底面に向かって延在している、
    　請求項３に記載の電動機。     The brush holder has a recess formed to have a step with the placement surface,
    The upright plate portion extends toward the bottom surface of the recess,
    The electric motor according to claim 3.
  5. 　前記立板部と前記凹部の内側面との間に隙間が形成されている、
    　請求項４に記載の電動機。     A gap is formed between the upright plate portion and the inner surface of the recess,
    The electric motor according to claim 4.
  6. 　前記電動機は、前記端子として第１の端子と第２の端子とを含み、
    　前記コンデンサは、前記リードとして第１のリードと第２のリードとを含み、
    　前記第１のリードは、前記第１の端子に接続され、
    　前記第２のリードは、前記第２の端子に接続されている、
    　請求項１～５のいずれか１項に記載の電動機。     The electric motor includes a first terminal and a second terminal as the terminals,
    the capacitor includes a first lead and a second lead as the leads;
    the first lead is connected to the first terminal;
    the second lead is connected to the second terminal;
    The electric motor according to any one of claims 1 to 5.
  7. 　前記電動機は、前記コンデンサとして第１のコンデンサと第２のコンデンサとを有し、
    　前記挿通孔には、前記第１のコンデンサと第２のコンデンサの各々の前記リードが挿通されている、
    　請求項１～６のいずれか１項に記載の電動機。     The electric motor has a first capacitor and a second capacitor as the capacitors,
    The lead of each of the first capacitor and the second capacitor is inserted through the insertion hole,
    The electric motor according to any one of claims 1-6.
  8. 　前記ブラシホルダは、前記コンデンサ収納部として第１のコンデンサ収納部と第２のコンデンサ収納部を含み、
    　前記第１のコンデンサが有する前記本体部は、前記第１のコンデンサ収納部に収納され、
    　前記第２のコンデンサが有する前記本体部は、前記第２のコンデンサ収納部収納されている、
    　請求項７に記載の電動機。     the brush holder includes a first capacitor housing portion and a second capacitor housing portion as the capacitor housing portion;
    the main body of the first capacitor is housed in the first capacitor housing,
    The body portion of the second capacitor is housed in the second capacitor housing portion,
    The electric motor according to claim 7.
  9. 　前記第１のコンデンサが有する前記本体部と前記第２のコンデンサが有する前記本体部は、前記第１のコンデンサ収納部あるいは前記第２のコンデンサ収納部のいずれか一方に収納されている、
    　請求項７に記載の電動機。     The body portion of the first capacitor and the body portion of the second capacitor are housed in either the first capacitor storage portion or the second capacitor storage portion,
    The electric motor according to claim 7.
  10. 　天板部と、
    　前記天板部に対して立設する立板部と、を有し、
    　前記立板部には、リード付き電子部品のリードが挿通される挿通孔が形成されている、
    　端子。     a top plate;
    a standing plate portion erected with respect to the top plate portion;
    An insertion hole through which a lead of an electronic component with a lead is inserted is formed in the upright plate,
    terminal.
PCT/JP2022/037990 2021-12-21 2022-10-12 Electric motor and terminal WO2023119801A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-206819 2021-12-21
JP2021206819 2021-12-21

Publications (1)

Publication Number Publication Date
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5529952U (en) * 1978-08-15 1980-02-27
JP2009232585A (en) * 2008-03-24 2009-10-08 Mitsuba Corp Wiper motor
WO2015004795A1 (en) * 2013-07-12 2015-01-15 株式会社ミツバ Motor device
US20150123504A1 (en) * 2013-11-04 2015-05-07 Robert Bosch Gmbh Interference suppression device
JP2018007387A (en) * 2016-06-30 2018-01-11 株式会社ミツバ Motor device
US20190149020A1 (en) * 2016-06-09 2019-05-16 Lg Innotek Co., Ltd. Ground terminal, cover assembly and motor comprising same
JP2020171081A (en) * 2019-04-01 2020-10-15 株式会社ミツバ Motor device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5529952U (en) * 1978-08-15 1980-02-27
JP2009232585A (en) * 2008-03-24 2009-10-08 Mitsuba Corp Wiper motor
WO2015004795A1 (en) * 2013-07-12 2015-01-15 株式会社ミツバ Motor device
US20150123504A1 (en) * 2013-11-04 2015-05-07 Robert Bosch Gmbh Interference suppression device
US20190149020A1 (en) * 2016-06-09 2019-05-16 Lg Innotek Co., Ltd. Ground terminal, cover assembly and motor comprising same
JP2018007387A (en) * 2016-06-30 2018-01-11 株式会社ミツバ Motor device
JP2020171081A (en) * 2019-04-01 2020-10-15 株式会社ミツバ Motor device

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