WO2023188591A1 - Terminal and electric motor - Google Patents

Abstract

A terminal that is secured to a resin component included in an electric motor and is connected to an electric wire disposed in the electric motor, the terminal including an insertion part inserted into the resin component by press fitting and a crimping part that is crimped to hold the electric wire.

Description

terminal and motor

The present disclosure relates to a terminal used in a motor and a motor.

Electric motors are used in a variety of products, including household appliances such as vacuum cleaners, industrial equipment such as semiconductor manufacturing equipment, and vehicles such as automobiles. For example, an electric blower mounted on a vacuum cleaner uses an electric motor to rotate a rotary fan. Two-wheel or four-wheel vehicles use electric motors to drive cooling fans such as radiators.

The electric motor includes a stator and a rotor that rotates due to the magnetic force of the stator. As electric motors, commutator motors that use brushes and brushless motors that do not use brushes are known. A commutator motor includes, for example, a stator, a rotor having a rotating shaft, a commutator attached to the rotating shaft, and a brush in contact with the commutator.

In a commutator motor, the brushes are stored in a brush housing. BACKGROUND ART Conventionally, a commutator motor has been proposed in which a brush accommodating portion is provided on the inner surface of a resin brush holder that covers an opening of a housing that accommodates a rotor and a stator (see Patent Document 1).

In order to suppress noise generated from the motor, a capacitor may be connected in parallel between a pair of power supply terminals, or a choke coil may be placed in the current path between the brush and the power supply terminal. When using a brush holder made of resin as described above, electronic components such as a pair of power supply terminals, a capacitor, and a choke coil may be arranged in this brush holder.

There are various electric wires in the electric motor. For example, in electronic components arranged in a brush holder, electric wires are used to connect the electronic components to each other, or the electronic components have electric wires. Specifically, electric motors include connection wires that connect power terminals and capacitors, leads of capacitors with leads, and coil wires that constitute choke coils. .

These wires may be connected to metal terminals fixed to the brush holder. For example, these plurality of electric wires are caulked together and connected to one metal terminal. Conventionally, the metal terminals to which these plurality of electric wires are connected are insert terminals. The metal terminals to which these plurality of electric wires are connected are integrally molded with the resin brush holder by insert molding.

However, if the metal terminal that holds the electric wire by caulking is an insert terminal, the structure of the mold for injection molding the brush holder becomes complicated when integrally molding the metal terminal and the brush holder by insert molding. As a result, the takt time when injection molding the brush holder, which is a resin component, deteriorates.

Japanese Patent Application Publication No. 2013-135493

The present disclosure has been made to solve such problems. An object of the present disclosure is to provide a terminal and a motor that can suppress deterioration of the takt time required for producing resin parts even when the terminal holds an electric wire and is fixed to a resin part by caulking.

In order to achieve the above object, one aspect of the terminal according to the present disclosure is a terminal that is fixed to a resin part included in an electric motor and to which an electric wire arranged on the electric motor is connected, the terminal being inserted into the resin part by press-fitting. and a caulking portion that is caulked and holds the electric wire.

One aspect of the electric motor according to the present disclosure includes the above-described terminal and one or more of the electric wires fixed to the caulked portion of the terminal.

According to the present disclosure, the terminal holding the electric wire is fixed to the resin component by press-fitting by caulking. Therefore, it is possible to suppress deterioration of the takt time required for producing resin parts.

FIG. 1 is a perspective view of an electric motor according to an embodiment. FIG. 2 is a sectional view of the electric motor according to the embodiment taken along a plane passing through the rotation axis. FIG. 3 is an exploded perspective view of the electric motor according to the embodiment. FIG. 4 is a perspective view of the brush holder in which various parts are arranged, when viewed from the inner side. FIG. 5 is a plan view of the brush holder in which various parts are arranged, as viewed from the inner side. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a sectional view of the brush holder to which the connection terminal is fixed after caulking. FIG. 8 is an enlarged cross-sectional view of region VIII surrounded by a broken line in FIG. FIG. 9 is a perspective view of the connection terminal according to the embodiment. FIG. 10 is a plan view of the connection terminal according to the embodiment. FIG. 11 is a diagram for explaining a method of fixing a connecting terminal to a brush holder and a method of connecting an electric wire to a connecting terminal. FIG. 12 is a plan view of a connection terminal according to a modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the embodiments described below each represent a specific example of the present disclosure. Therefore, the numerical values, components, arrangement positions and connection forms of the components, steps and order of steps, etc. shown in the following embodiments are merely examples and do not limit the present disclosure. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims representing the most important concept of the present disclosure will be described as arbitrary constituent elements.

Note that each figure is a schematic diagram and is not necessarily strictly illustrated. In each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping explanations will be omitted or simplified. In this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the downward direction (vertically downward) in absolute spatial recognition.

(Embodiment)
The overall configuration of the electric motor 1 according to the embodiment will be described using FIGS. 1 to 5. FIG. 1 is a perspective view of an electric motor 1 according to an embodiment. FIG. 2 is a cross-sectional view of the electric motor 1 according to the embodiment taken along a plane passing through the rotating shaft 21. FIG. In FIG. 2, only the portion that appears in the cross section is illustrated. FIG. 3 is an exploded perspective view of the electric motor 1 according to the embodiment. FIG. 4 is a perspective view of the brush holder 70 in which various parts are arranged, when viewed from the inner side. FIG. 5 is a plan view of the brush holder 70 in which various parts are arranged, when viewed from the inner side.

The electric motor 1 is a brushed commutator electric motor. As shown in FIGS. 1 to 3, the electric motor 1 includes a stator 10, a rotor 20, a commutator 30, a brush 40, a pigtail wire 45, a brush spring 50, a frame 60, and a brush holder 70. , a first bearing 81 and a second bearing 82. The electric motor 1 further includes a seal member 90 to ensure the airtightness of the frame 60.

The electric motor 1 is a direct current motor (DC motor) driven by direct current. As an example, the electric motor 1 is an in-vehicle motor used in an automobile. For example, the electric motor 1 is used in a hydraulic pump for an anti-lock brake system (ABS) installed in an automobile. Each component of the electric motor 1 will be explained in detail below.

The stator 10 (stator) generates magnetic force that acts on the rotor 20 in order to rotate the rotor 20. The stator 10 is configured to generate magnetic flux on the air gap surface with the rotor 20. The stator 10 constitutes a magnetic circuit together with the rotor 20, which is an armature. The stator 10 is configured such that north poles and south poles are alternately present on the air gap surface with the rotor 20 along the circumferential direction of the rotating shaft 21 that the rotor 20 has. The stator 10 is a magnetic field that creates magnetic flux for generating torque. The stator 10 is composed of a plurality of magnets. The magnets constituting the stator 10 are, for example, permanent magnets having an S pole and an N pole.

The plurality of magnets constituting the stator 10 are arranged so that N poles and S poles are alternately and evenly distributed in the circumferential direction. Therefore, the direction of the main magnetic flux generated by the stator 10 (magnet) is perpendicular to the direction in which the axis C of the rotating shaft 21 extends. The plurality of magnets are arranged at equal intervals in the circumferential direction so as to surround the rotor core 22 of the rotor 20. As an example, each magnet has an arcuate shape with a substantially constant thickness when viewed from above, that is, from the direction in which the axis C extends. Each magnet is fixed to the frame 60. Specifically, each magnet is fixed to the inner peripheral surface of the frame 60 with an adhesive, a leaf spring, or the like.

The rotor 20 (rotor) is rotated by the magnetic force generated in the stator 10. The rotor 20 has a rotating shaft 21 . The rotor 20 rotates about a rotating shaft 21 as a rotation center. Specifically, the rotor 20 rotates about the axis C of the rotating shaft 21 as the rotation center.

The rotor 20 is an armature. The rotor 20 includes a rotor core 22 and a winding 23 wound around the rotor core 22 . In FIG. 2 the winding 23 is shown schematically.

The rotating shaft 21 is a shaft that is the center of rotation of the rotor 20. As an example, the rotating shaft 21 is a metal rod made of a metal material such as stainless steel. The rotating shaft 21 extends in the longitudinal direction, which is the direction of the axis C.

The rotating shaft 21 passes through the rotor core 22. The rotating shaft 21 is fixed to a rotor core 22. Specifically, the rotating shaft 21 is fixed to the rotor core 22 while penetrating the center of the rotor core 22 so as to extend on both sides of the rotor core 22 . The rotating shaft 21 is fixed to the rotor core 22 by press-fitting or shrink-fitting into a center hole formed in the rotor core 22.

The first portion 21a of the rotating shaft 21 protrudes from one side of the rotor core 22 and is supported by the first bearing 81. The first portion 21a of the rotating shaft 21 is an output side portion (output shaft) of the rotating shaft 21. Specifically, the first portion 21 a of the rotating shaft 21 protrudes from the first bearing 81 . A load is attached to the tip portion (output side end portion) of the rotating shaft 21 that protrudes from the first bearing 81 .

On the other hand, the second portion 21b of the rotating shaft 21 protrudes from the other side of the rotor core 22. The second portion 21b is supported by a second bearing 82. The second portion 21b of the rotating shaft 21 is a portion on the opposite output side of the rotating shaft 21 (non-output shaft).

As an example, the first bearing 81 and the second bearing 82 are bearings that rotatably support the rotating shaft 21. In this way, the rotating shaft 21 is rotatably supported by the first bearing 81 and the second bearing 82. The first bearing 81 is fixed to the brush holder 70. The second bearing 82 is fixed to the frame 60.

The rotor core 22 (rotor core) is an armature core around which the winding 23 is wound. The rotor core 22 is a magnetic body made of a magnetic material. The rotor core 22 is, for example, a laminate in which a plurality of punched electromagnetic steel sheets formed in a predetermined shape are stacked in the direction of the axis C of the rotating shaft 21. The rotor core 22 is not limited to a laminate of electromagnetic steel sheets. The rotor core 22 may be a bulk body made of a magnetic material. A minute air gap exists between the outer peripheral surface of the rotor core 22 and the stator 10.

As shown in FIG. 3, the rotor core 22 has a plurality of teeth 22a. The plurality of teeth 22a are formed radially so as to protrude in the radial direction, which is a direction perpendicular to the axis C of the rotating shaft 21. The plurality of teeth 22a are arranged at equal intervals in the rotational direction of the rotating shaft 21. A slot is formed between two adjacent teeth 22a.

As shown in FIGS. 2 and 3, a winding 23 is wound around the rotor core 22. The electric wire constituting the winding 23 is, for example, an insulated wire. The electric wire constituting the winding 23 includes a conductive wire made of a conductive material such as copper as a core wire, and an insulating film covering the conductive wire.

The winding 23 is wound around the rotor core 22 via an insulator 24. The insulator 24 is made of an insulating resin material or the like. The insulator 24 is attached between the winding 23 and the rotor core 22. The winding 23 is provided for each slot of the rotor core 22.

The winding 23 is electrically connected to the commutator 30. Specifically, the winding 23 is electrically connected to the commutator pieces 31 of the commutator 30. When current flows through the winding 23 via the commutator 30, the rotor 20 generates a magnetic force that acts on the stator 10. Specifically, when a current flows through the winding 23, each of the plurality of teeth 22a of the rotor core 22 generates a magnetic force that acts on the stator 10. The main magnetic flux generated by the rotor 20 (teeth 22a) is oriented in the radial direction around the rotating shaft 21. The winding 23 is a concentrated winding. The winding 23 is wound around each of the plurality of teeth 22a via an insulator 24.

The rotor 20 is an inner rotor. As shown in FIG. 2, the rotor 20 is arranged inside the stator 10. Specifically, the rotor core 22 of the rotor 20 is surrounded by a plurality of magnets that constitute the stator 10 with a small air gap between the rotor core 22 and the stator 10 .

A commutator 30 is attached to the rotating shaft 21 of the rotor 20. Therefore, the commutator 30 rotates together with the rotating shaft 21. The commutator 30 is attached to a portion of the rotating shaft 21 between the rotor core 22 and the first bearing 81 .

As shown in FIGS. 2 and 3, the commutator 30 has a plurality of commutator pieces 31 (commutator segments). The plurality of commutator pieces 31 are arranged in an annular shape at equal intervals so as to surround the rotating shaft 21 . Each of the plurality of commutator pieces 31 is a conductive terminal made of a metal material such as copper. Each of the plurality of commutator pieces 31 is electrically connected to the winding 23 that the rotor 20 has. In one example, commutator 30 is a molded commutator. The commutator 30 has a structure in which a plurality of commutator pieces 31 are molded with resin. In this case, the plurality of commutator pieces 31 are embedded in the molding resin so that the surfaces thereof are exposed. The plurality of commutator pieces 31 are insulated and separated from each other. However, for example, two adjacent commutator pieces 31 are connected to each other by a winding 23.

As shown in FIG. 2, a brush 40 is in contact with the commutator 30. Specifically, the brush 40 is in contact with the commutator piece 31 that the commutator 30 has. The brush 40 is a power supply brush (current-carrying brush) that supplies power to the winding 23 of the rotor 20. As an example, the brush 40 is a carbon brush made of carbon. Specifically, the brush 40 is a carbon brush containing metal such as copper. The brush 40 has a long shape in its initial state before it wears out. The brush 40 is, for example, an elongated substantially rectangular parallelepiped.

As shown in FIG. 2, the brush 40 has a front end surface 40a that is in contact with the commutator 30, and a rear end surface 40b that is a surface opposite to the front end surface 40a. The front end surface 40a is an end surface at a front end portion that is one end of the brush 40 in the longitudinal direction. The rear end surface 40b is an end surface at the rear end portion which is the other end of the brush 40 in the longitudinal direction. The front end surface 40a is a sliding surface that comes into sliding contact with the commutator piece 31 of the commutator 30.

The brush 40 is arranged so that its longitudinal direction is perpendicular to the axis C of the rotating shaft 21 (that is, the radial direction of rotation of the rotating shaft 21). A plurality of brushes 40 are arranged. Specifically, two brushes 40 are arranged. In this case, the pair of brushes 40 are arranged to face each other with the commutator 30 in between. A front end surface 40a, which is an inner tip of each brush 40, is in contact with a commutator piece 31 of the commutator 30. As the electric motor 1 operates to rotate the rotary shaft 21 and the commutator 30 rotates, the front end surface 40a of each brush 40 continues to contact all the commutator pieces 31 in sequence.

Each brush 40 is arranged so as to be able to come into sliding contact with the commutator 30. As shown in FIG. 2, each brush 40 receives a pressing force from a brush spring 50 and is always in contact with the commutator 30 while the electric motor 1 is operating. Specifically, the front end surface 40a of the brush 40 is always in contact with the commutator piece 31 of the commutator 30. In this way, each brush 40 is pressed against the commutator 30 by the brush spring 50.

As shown in FIGS. 4 and 5, a pigtail wire 45 is connected to the brush 40. Specifically, one end of the pigtail wire 45 is connected to the brush 40. One end of the pigtail wire 45 is fixed to the brush 40 by being embedded in the side surface of the brush 40. A current supplied from the power terminal 100 flows through the pigtail wire 45 . Therefore, when the brush 40 comes into contact with the commutator piece 31, the current (armature current) supplied to the brush 40 via the pigtail wire 45 flows through the commutator piece 31 to the winding 23 of the rotor 20.

The other end of the pigtail wire 45 is fixed to the choke coil 110. The other end of the pigtail wire 45 and the choke coil 110 are fixed by welding such as spot welding.

The brush spring 50 is an elastic member for pressing the brush 40 against the commutator 30. The brush spring 50 is arranged one-to-one with the brush 40. A portion of the brush spring 50 is in contact with the rear end surface 40b of the brush 40. The brush spring 50 applies pressure (spring pressure) to the brush 40 using spring elastic force (spring restoring force). Thereby, the brush 40 is urged toward the commutator 30. The brush spring 50 is a compression coil spring. The brush spring 50 is not limited to a compression coil spring, but may be a torsion spring or the like.

The brush 40 is stored in a brush storage section 71 provided in the brush holder 70. The brush 40 stored in the brush storage section 71 slides within the brush storage section 71 by being pressed by the brush spring 50. Therefore, it is preferable that an appropriate gap (clearance) be provided between the inner surface of the brush accommodating part 71 and the outer surface of the brush 40 so that the brush 40 can slide smoothly in the brush accommodating part 71. The brush 40 pressed against the brush spring 50 moves within the brush storage portion 71 toward the commutator 30 as the front end surface 40a of the brush 40 is worn. Specifically, the brush 40 moves in a direction perpendicular to the axis C of the rotating shaft 21, that is, in the radial direction.

The frame 60 (housing) is a casing (case) that houses the stator 10. That is, the stator 10 is housed in the frame 60. The frame 60 also houses the rotor 20. Specifically, the frame 60 houses the rotor core 22 and the windings 23 of the rotor 20.

The frame 60 is a substantially bottomed cylindrical housing having an opening 60a. The frame 60 has a substantially bottomed cylindrical shape. The frame 60 is a metal frame made of a metal material such as an iron-based material. The frame 60 may be made of a resin material instead of a metal material.

The frame 60 is also a bracket that holds the second bearing 82. Therefore, the frame 60 is provided with a bearing holding portion 61 that holds the second bearing 82. The second bearing 82 is arranged inside the frame 60.

As shown in FIG. 2, the brush holder 70 is a plate-shaped lid disposed to cover the opening 60a of the frame 60. That is, the brush holder 70 covers the opening 60a of the frame 60. The opening 60a of the frame 60 has a circular opening shape. Therefore, the top view shape of the brush holder 70 is circular. The brush holder 70 is fitted into the opening 60a of the frame 60. The brush holder 70 is press-fitted into the open end of the frame 60. Thereby, the brush holder 70 is fixed to the open end of the frame 60. Therefore, the side surface of the outer peripheral end of the brush holder 70 is in contact with the inner surface of the open end of the frame 60.

The brush holder 70 covers the rotor 20 housed in the frame 60 by covering the opening 60a of the frame 60. Specifically, as shown in FIG. 2, the brush holder 70 covers the rotor core 22 to which the rotating shaft 21 is fixed. For this reason, as shown in FIG. 3, a through hole is provided in the center of the brush holder 70 to allow the rotating shaft 21 to pass therethrough.

The frame 60 and the brush holder 70 constitute an outer casing of the electric motor 1. The outer casing composed of the frame 60 and the brush holder 70 houses not only the stator 10 and the rotor 20 but also other parts constituting the electric motor 1 such as the commutator 30 and the brushes 40.

As shown in FIGS. 2 and 4, the brush holder 70 is a holding member that holds the brush 40. Specifically, the brush holder 70 has a brush storage part 71 as a brush holding part in order to hold the brush 40. The brush storage section 71 stores the brush 40. The brush storage section 71 is a part of the brush holder 70 and is provided on the inner surface of the brush holder 70.

A brush storage section 71 is provided for each brush 40. In this embodiment, two brushes 40 are used. Therefore, as shown in FIG. 4, the brush holder 70 has two brush storage sections 71.

Each brush storage section 71 is constructed by forming the brush holder 70 into a concave shape. Each brush storage section 71 has an elongated shape whose longitudinal direction is the direction in which the brush 40 moves. Each brush storage portion 71 is elongated in a direction perpendicular to the axis C of the rotating shaft 21 (that is, in the radial direction of the rotating shaft 21). Each brush storage portion 71 has a concave cross-sectional shape.

As shown in FIGS. 2 and 4, the brush storage section 71 is covered by a cover plate 79. In other words, the cover plate 79 covers the brush 40. The cover plate 79 is, for example, a metal cover made of a metal plate. The cover plate 79 is arranged to cover the brush storage section 71. In the brush storage section 71, a brush spring 50 is also stored together with the brush 40. Therefore, the cover plate 79 covers not only the brush 40 but also the brush spring 50.

The brush holder 70 is also a bracket that holds the first bearing 81. The first bearing 81 is fixed to the brush holder 70. As shown in FIGS. 1 and 2, the first bearing 81 is arranged and fixed on the outer surface of the brush holder 70.

As shown in FIGS. 1 and 3, a recess 70a is formed on the outer surface of the brush holder 70. The recess 70a is a reservoir tank for temporarily storing liquid such as oil leaked from mechanical parts around the electric motor 1. The recess 70a is formed to protrude inward so as to recess a portion of the outer surface.

As shown in FIGS. 2 and 3, a stepped portion 70b on which the seal member 90 is placed is formed on the outer surface of the brush holder 70. The stepped portion 70b is formed in the shape of a collar at the outer peripheral end of the brush holder 70. The stepped portion 70b is formed in an annular shape over the entire circumference of the brush holder 70. The stepped portion 70b is formed by reducing the thickness of the outer peripheral end of the brush holder 70. As shown in FIG. 2, the seal member 90 is held between the rising surface of the stepped portion 70b and the inner surface of the frame 60. Specifically, the seal member 90 is fixed to the stepped portion 70b by being press-fitted into the stepped portion 70b.

The seal member 90 placed on the stepped portion 70b is an annular seal ring for ensuring airtightness between the frame 60 and the brush holder 70. The seal member 90 is in contact with the inner surface of the frame 60. As shown in FIG. 3, the seal member 90 has an annular shape. The seal member 90 has rubber elasticity. The seal member 90 is made of a resin material such as an elastomer.

The brush holder 70 is made of resin material. That is, the brush holder 70 is a resin plate made of resin. As an example, the brush holder 70 is made of polyphthalamide (PPA), nylon 6, or the like. The brush holder 70 is a resin molded product integrally made of a resin material.

As shown in FIGS. 4 and 5, a pair of power supply terminals 100, a choke coil 110, a capacitor 120, and a connection terminal 130 are arranged on the brush holder 70. A pair of power supply terminals 100, a choke coil 110, a capacitor 120, and a connection terminal 130 are arranged on the inner surface (inner surface) of the brush holder 70.

The pair of power terminals 100 are arranged in a power terminal arrangement section 72 provided on the brush holder 70. The power terminal placement portion 72 is, for example, a recess provided on the inner surface of the brush holder 70. Each of the pair of power terminals 100 is fixed to the brush holder 70 by being press-fitted into the power terminal arrangement portion 72, for example.

The pair of power supply terminals 100 are power supply terminals for supplying power received from an external power supply to the winding 23 of the rotor 20. A pair of power supply terminals 100 receive DC power from an external power supply. In this case, one of the pair of power supply terminals 100 is a positive side power supply terminal connected to the positive side of the DC power supply. The other of the pair of power supply terminals 100 is a negative power supply terminal connected to the negative pole side of the DC power supply.

As shown in FIGS. 4 and 5, the choke coil 110 is arranged in a coil arrangement section 73 provided in the brush holder 70. The choke coil 110 is fixed to the brush holder 70, for example, by a locking claw provided on the inner surface of the brush holder 70. The coil placement portion 73 is, for example, a recessed portion formed by recessing the inner surface of the brush holder 70.

The choke coil 110 is inserted into the current path between the brush 40 and the power supply terminal 100. Thereby, noise generated from the electric motor 1 can be suppressed. Specifically, the choke coil 110 can remove noise contained in the current flowing in the current path between the brush 40 and the power supply terminal 100. The choke coil 110 can suppress relatively high frequency currents and allow only direct current or relatively low frequency currents to pass.

The choke coil 110 is arranged one-to-one with the brush 40. In this embodiment, two brushes 40 are arranged. Therefore, two choke coils 110 are arranged. One of the two choke coils 110 is inserted into a current path between one of the two brushes 40 and one of the pair of power terminals 100. The other of the two choke coils 110 is inserted into a current path between the other of the two brushes 40 and the other of the pair of power terminals 100.

Each choke coil 110 is made of a coil wire, which is an example of an electric wire. A first end 110a, which is one end of the coil wire constituting the choke coil 110, is connected to a connection terminal 130. Specifically, the first end 110a of the choke coil 110 is caulked to and fixed to the connection terminal 130. The connection terminal 130 is connected to the power supply terminal 100 by a connection line 140. Therefore, the choke coil 110 is electrically connected to the power supply terminal 100 via the connection terminal 130 and the connection line 140. The connection wire 140 is an example of an electric wire that connects the connection terminal 130 and the power supply terminal 100. The connection wire 140 may be an insulated conductive wire coated with insulation, or may be a bare conductive wire without insulation coating. On the other hand, the second end 110b, which is the other end of the coil wire constituting the choke coil 110, is connected to the pigtail wire 45. As described above, the second end 110b of the choke coil 110 and the pigtail wire 45 are connected and fixed by welding or the like.

As shown in FIG. 5, the capacitor 120 is arranged in a capacitor arrangement part 74 provided in the brush holder 70. The capacitor placement portion 74 is, for example, a recess provided on the inner surface of the brush holder 70. Capacitor 120 is housed in capacitor placement section 74 .

The capacitor 120 is connected in parallel between the pair of power supply terminals 100. Thereby, noise generated from the electric motor 1 can be suppressed. Two capacitors 120 are arranged in the brush holder 70. Therefore, two series-connected capacitors 120 are connected in parallel to the pair of power supply terminals 100. The two capacitors 120 are connected via a metal component 150 fixed to the brush holder 70. Each of the two capacitors 120 may be connected in parallel to the pair of power supply terminals 100. The number of capacitors 120 may be one instead of two.

As shown in FIG. 5, each capacitor 120 is a lead type capacitor (capacitor with leads). Each capacitor 120 has a main body 121 and a pair of leads 122. The pair of leads 122 are lead pins (lead terminals) pulled out from the main body 121. The pair of leads 122 are made of electric wires such as metal wires.

One of the pair of leads 122 of the capacitor 120 is connected to one of the two connection terminals 130. The connection terminal 130 is connected to the power supply terminal 100 by a connection line 140. Therefore, in each capacitor 120, one of the pair of leads 122 is electrically connected to the power supply terminal 100 via the connection terminal 130 and the connection line 140. The other of the pair of leads 122 of each capacitor 120 is connected to a metal component 150. This connects the two capacitors 120 in series.

As shown in FIGS. 4 and 5, the connection terminal 130 is arranged in a connection terminal placement portion 75 provided on the brush holder 70. The connection terminal placement portion 75 is a recess provided on the inner surface of the brush holder 70. Connection terminal 130 is an outsert terminal. The connection terminal 130 is fixed to the brush holder 70 by being press-fitted into the connection terminal arrangement portion 75. The detailed configuration of the connection terminal 130 will be described later.

In the electric motor 1 configured as described above, the current supplied to the brushes 40 via the power supply terminal 100 flows as an armature current (driving current) to the winding 23 of the rotor 20 via the commutator 30. , magnetic flux is generated in the rotor 20. The magnetic force generated by the interaction between the magnetic flux generated in the rotor 20 and the magnetic flux generated from the stator 10 becomes a 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 piece 31 and the brush 40 are in contact with each other. In this way, by switching the direction in which the current flows, a rotational force in a certain direction is generated by the repulsion and attraction of the magnetic force generated between the stator 10 and the rotor 20, and the rotor 20 rotates. It rotates around the axis C of the shaft 21.

Next, the detailed configuration of the connection terminal 130 fixed to the brush holder 70 and the connection structure of the connection terminal 130 and various electric wires will be explained using FIGS. 6 to 10 with reference to FIGS. 4 and 5. do.

FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG. 6 shows the connection terminal 130 before crimping. FIG. 7 is a cross-sectional view of the brush holder to which the connecting terminal 130 is fixed after caulking. FIG. 8 is an enlarged cross-sectional view of region VIII surrounded by a broken line in FIG. FIG. 9 is a perspective view of the connection terminal 130 according to the embodiment. FIG. 10 is a plan view of the connection terminal 130 according to the embodiment. 9 and 10 show the shape of the connection terminal 130 before crimping.

The connection terminal 130 is a terminal to which one or more electric wires are connected. A plurality of electric wires are connected to the connection terminal 130. Specifically, as shown in FIGS. 6 to 8, the connection terminal 130 includes a plurality of electric wires including a connection wire 140 connected to the power supply terminal 100, a coil wire constituting the choke coil 110, and a capacitor 120. The lead 122 of the connector is connected to the lead 122. These electric wires are fixed to the connection terminal 130 by caulking a part of the connection terminal 130, as shown in FIG. After the connecting terminal 130 and the electric wire are connected by caulking, solder may be further applied to the connecting portion between the connecting terminal 130 and the electric wire to connect the connecting terminal 130 and the electric wire by soldering.

The connection terminal 130 is a relay terminal inserted into the current path of a plurality of electronic components. Specifically, the connection terminal 130 is inserted into the current path between the brush 40 and the power supply terminal 100. The connection terminals 130 are arranged one-to-one with the pair of power supply terminals 100. Therefore, as shown in FIGS. 4 to 7, two connection terminals 130 are fixed to the brush holder 70.

As shown in FIGS. 6 and 7, one of the two connection terminals 130 has a connection wire 140 connected to one of the pair of power supply terminals 100, and one of the two choke coils 110. The first end 110a of one choke coil 110 is connected to one lead 122 of a pair of leads 122 of one of the two capacitors 120.

The other of the two connection terminals 130 includes a connection wire 140 connected to the other power supply terminal 100 of the pair of power supply terminals 100 and a first end of the other choke coil 110 of the two choke coils 110. 110a and one lead 122 of a pair of leads 122 of the other of the two capacitors 120 are connected.

The connection terminal 130 is a terminal that is fixed to the resin component and to which an electric wire is connected. The connection terminal 130 has an insertion portion 131 that is a portion embedded and fixed in a resin component, and a caulking portion 132 that is a portion to which an electric wire is connected.

The insertion part 131 is a part that is inserted into a resin component by press fitting. In other words, the insertion portion 131 is a press-fit portion that is press-fitted into the resin component. Therefore, connection terminal 130 is an outsert terminal. The connection terminal 130 is fixed to the resin component by press-fitting the insertion portion 131 into the resin component. The insertion portion 131 inserted into the resin component is embedded in the resin component, so it is not exposed from the resin component and is hidden inside the resin component. As shown in FIGS. 6 to 8, the insertion portion 131 is press-fitted into the connection terminal placement portion 75 of the brush holder 70, which is a resin component. Specifically, the insertion portion 131 is tightly fitted into a recess provided as the connection terminal placement portion 75 in the brush holder 70 .

As shown in FIGS. 8 to 10, the insertion portion 131 has a pair of first protrusions 131a and a pair of second protrusions 131b. One of the pair of first protrusions 131a protrudes from one side of the insertion portion 131. The other of the pair of first protrusions 131a protrudes from the other side of the insertion portion 131. The pair of first protrusions 131a are provided at positions facing each other. Similarly, one of the pair of second protrusions 131b protrudes from one side of the insertion portion 131. The other of the pair of second protrusions 131b protrudes from the other side of the insertion portion 131. The pair of second protrusions 131b are provided at positions facing each other.

The pair of first protrusions 131a are located closer to the distal end of the insertion portion 131 in the insertion direction than the pair of second protrusions 131b. That is, the pair of second protrusions 131b are located closer to the caulking portion 132 than the pair of first protrusions 131a.

As shown in FIG. 8, the pair of first protrusions 131a and the pair of second protrusions 131b are inserted into the recess of the brush holder 70 when the insertion part 131 is inserted into the recess (connection terminal arrangement part 75) of the brush holder 70. gets caught on the inner wall surface. In this way, by providing the pair of first protrusions 131a and the pair of second protrusions 131b on the insertion portion 131, the holding force with which the connection terminal 130 is held by the brush holder 70 can be improved. Furthermore, it is possible to prevent the connection terminal 130 from coming off from the brush holder 70. Particularly, since the two-step protrusions of the pair of first protrusions 131a and the pair of second protrusions 131b are caught on the inner wall surface of the recessed portion of the brush holder 70, a high holding force can be obtained.

Furthermore, if the insertion portion 131 is provided with two-stage protrusions, there is a risk that it will be difficult to press-fit the insertion portion 131 into the recess of the brush holder 70. However, the protrusion height of the first protrusion 131a is lower than the protrusion height of the second protrusion 131b. As a result, even if a two-stage protrusion including a pair of first protrusions 131a and a pair of second protrusions 131b is provided, the insertion portion 131 can be easily press-fitted into the recess of the brush holder 70.

In this embodiment, the protrusion heights of the pair of first protrusions 131a are the same. However, it is not limited to this. The protrusion heights of the pair of second protrusions 131b are also the same. However, it is not limited to this.

As shown in FIGS. 8 to 10, the insertion portion 131 has a recess 131c between the first protrusion 131a and the second protrusion 131b on each of one side and the other side. That is, the insertion portion 131 is provided with a pair of recesses 131c. One of the pair of recesses 131c is formed to recess one side of the insertion portion 131 inward. The other of the pair of recesses 131c is formed to recess the other side of the insertion portion 131 inward. The pair of recesses 131c are formed at positions facing each other. As shown in FIG. 10, the width W1 of the end of the insertion portion 131 on the caulking portion 132 side is wider than the width W2 between the recess 131c on one side and the recess 131c on the other side. ing.

The caulking portion 132 in the connection terminal 130 is a portion that is caulked and holds the electric wire. That is, by caulking the caulking portion 132, the electric wire is fixed to the caulking portion 132. A plurality of electric wires are fixed to the caulked portion 132. In this case, the plurality of electric wires are stacked in the insertion direction of the insertion section 131 and fixed to the caulking section 132.

Specifically, as shown in FIGS. 6 to 8, the caulking portion 132 includes a plurality of electric wires including a connection wire 140 connected to the power supply terminal 100, a first end 110a of the choke coil 110, and a capacitor. 120 has a lead 122 that is fixed.

The caulked portion 132 is also a portion exposed from the brush holder 70. In this embodiment, the entire caulked portion 132 is exposed from the brush holder 70.

As shown in FIGS. 8 to 10, the caulking portion 132 has a pair of sandwiching portions 132a that sandwich the electric wire. The pair of pinching portions 132a extend in a direction opposite to the insertion direction of the insertion portion 131. When fixing an electric wire to the caulking part 132, as shown in FIG. 6, the electric wire is held between a pair of pinch parts 132a, and the pair of pinch parts 132a are caulked. Specifically, as shown in FIG. 7, the pair of clamping parts 132a are bent down and plastically deformed until the tips of the pair of clamping parts 132a come into contact with each other. Thereby, as shown in FIG. 7, the electric wire can be clamped and fixed between the pair of clamping portions 132a by caulking. By providing the pair of sandwiching portions 132a in this way, the electric wire can be easily fixed to the caulking portion 132.

As shown in FIG. 10, in the outer shape of the tip of each of the pair of pinching portions 132a, the inner radius of curvature R1 is larger than the outer radius of curvature R2. With this configuration, when the pair of clamping parts 132a are caulked, the tips of the pair of clamping parts 132a can easily come into contact with each other. In other words, the electric wire placed between the pair of sandwich parts 132a can be easily confined in the pair of caulked sandwich parts 132a.

In each of the pair of sandwich portions 132a, the outline of each of the inner portion (opposed portion) and outer portion is a straight line. However, each of the pair of sandwich parts 132a has a tapered shape. The width of each of the pair of pinching portions 132a gradually becomes narrower toward the tip. Thereby, the pair of clamping parts 132a can be easily collapsed and caulked while ensuring the strength of the pair of clamping parts 132a.

The root portions of the pair of pinching portions 132a in the caulking portion 132 are connected to each other. That is, the caulking portion 132 has a connecting portion that connects the root portions of the pair of pinching portions 132a. As an example, the shape of the caulked portion 132 is substantially U-shaped. In this way, the strength of the caulking portion 132 can be improved by connecting the root portions of the pair of pinching portions 132a.

The width of the caulked portion 132 is wider than the width of the insertion portion 131. Specifically, as shown in FIG. 10, the width W3 of the end portion of the caulking portion 132 on the insertion portion 131 side is wider than the width of the end portion W1 of the insertion portion 131 on the caulking portion 132 side. As a result, a step (jaw portion) is formed at the lower end portion of the lateral side of the caulked portion 132. Thereby, when inserting the connection terminal 130 into the brush holder 70, the step at the lower end of the caulked portion 132 comes into contact with the brush holder 70. That is, the step at the lower end of the caulked portion 132 functions as a stopper when the connecting terminal 130 is inserted into the recess of the brush holder 70.

Two electric wires, a connecting wire 140 connected to the power supply terminal 100 and a first end 110a of the choke coil 110, are arranged between the pair of sandwich parts 132a. The connection wire 140 connected to the power supply terminal 100 and the first end portion 110a of the choke coil 110 are stacked in the insertion direction of the insertion portion 131. As an example, the connection wire 140 connected to the power supply terminal 100 is arranged on the first end 110a of the choke coil 110, but the reverse may be used.

A concave portion 132b having a width narrower than the interval between the pair of sandwich portions 132a is formed at the root portion between the pair of sandwich portions 132a. Thereby, when a plurality of electric wires are arranged in the caulking part 132, the electric wire with a small wire diameter can be placed in the recess 132b, and the electric wire with a large wire diameter can be placed between the pair of sandwich parts 132a. The lead 122 of the capacitor 120 is arranged in the recess 132b.

The connection terminal 130 configured in this way is made of a conductive material. The connection terminal 130 is a metal terminal made of a metal material. As an example, the connection terminal 130 is made of brass. However, it is not limited to this. The connection terminal 130 is made of a flat metal plate with a constant thickness. Specifically, the connection terminal 130 is formed without bending a metal plate. The insertion portion 131 and the caulking portion 132 have a continuous flat plate shape. Therefore, the front 133 and back 134 of the insertion portion 131 and the front 133 and back 134 of the caulking portion 132 are flush with each other. A front surface 133 of the insertion section 131 and a front surface 133 of the caulking section 132 are located on opposite sides of the back surface 134 of the insertion section 131 and the rear surface 134 of the caulking section 132, respectively. The connection terminal 130 having such a shape can be manufactured, for example, by punching a flat metal plate.

As described above, the connection terminal 130 according to the present embodiment is a connection terminal 130 that is fixed to a resin part included in the electric motor 1 and to which an electric wire placed on the electric motor 1 is connected, and is press-fitted into the resin part. It includes an insertion section 131 to be inserted, and a caulking section 132 that is caulked and holds the electric wire. In other words, the connection terminal 130 that holds the electric wire by caulking is an outsert terminal. The connection terminal 130 is fixed to the resin component by press-fitting the insertion portion 131 into the resin component.

This configuration simplifies the mold for injection molding the resin parts compared to the case where the connection terminals that hold the electric wires are used as insert terminals by caulking, and the resin parts and the connection terminals are integrally molded by insert molding. be able to. Thereby, it is possible to suppress deterioration of the takt time required for producing resin parts. That is, by using the connection terminal 130 that is an outsert terminal, the takt time required for producing resin parts can be improved compared to the case where an insert terminal is used.

The connection terminal 130 is press-fitted and fixed into the brush holder 70 made of resin. Therefore, by using the connection terminal 130, a mold for injection molding the brush holder 70 can be simplified. Moreover, the takt time required for producing the brush holder 70 can be improved.

Next, a method of fixing the connecting terminal 130 to the brush holder 70 and a method of connecting an electric wire to the connecting terminal 130 will be explained using FIG. 11. FIG. 11 is a diagram for explaining a method of fixing the connection terminal 130 to the brush holder 70 and a method of connecting an electric wire to the connection terminal 130.

First, as shown in FIG. 11(a), the insertion portion 131 of the connection terminal 130 is inserted toward the recess that is the connection terminal placement portion 75 of the brush holder 70. Then, as shown in FIG. 11(b), the tip of the insertion portion 131 of the connection terminal 130 comes into contact with the open end of the recess of the brush holder 70.

Thereafter, by pushing the connection terminal 130 into the brush holder 70, the side surface of the insertion portion 131 of the connection terminal 130 slides on the inner wall surface of the recess of the brush holder 70, and the insertion portion 131 tightly enters the recess of the brush holder 70. I'll go. That is, the insertion portion 131 is press-fitted into the recessed portion of the brush holder 70.

As the insertion part 131 goes deeper into the recess of the brush holder 70, as shown in FIG. It comes into contact with the open end of the recess of the holder 70 . Further, the connection terminal 130 is pushed in.

Specifically, as shown in FIG. 11(d), the connection terminal 130 is pushed in until the step between the caulking part 132 and the insertion part 131 comes into contact with the surface of the brush holder 70. As a result, the entire insertion portion 131 enters the recess of the brush holder 70, and the insertion portion 131 fits into the recess of the brush holder 70. At this time, the pair of first protrusions 131a, which are the first stage protrusions of the insertion portion 131, are caught on the inner wall surface of the recess of the brush holder 70. At the same time, the pair of second protrusions 131b, which are the second stage protrusions of the insertion portion 131, are also caught on the inner wall surface of the recess of the brush holder 70.

In this way, the insertion portion 131 of the connection terminal 130 is press-fitted into the recess of the brush holder 70, and the connection terminal 130 is fixed to the brush holder 70.

Next, in order to fix the electric wire to the connection terminal 130 fixed to the brush holder 70, first, the electric wire to be connected to the connection terminal 130 is placed in the caulked portion 132 of the connection terminal 130. Specifically, one or more electric wires are placed between the pair of sandwiching parts 132a in the caulking part 132. That is, as shown in FIG. 11(e), the connection wire 140 connected to the power supply terminal 100, the first end 110a of the choke coil 110, and the lead 122 of the capacitor 120 are connected between the pair of sandwich parts 132a. Place the three electric wires.

In this case, the lead 122 of the capacitor 120 is placed in the recess 132b of the caulked part 132. On top of that, the first end 110a of the choke coil 110 and the connection wire 140 connected to the power supply terminal 100 are stacked in this order.

Next, by caulking the caulking portion 132 of the connection terminal 130, the electric wire placed on the caulking portion 132 is fixed to the caulking portion 132. That is, the pair of clamping parts 132a are caulked in a state where one or more electric wires are arranged between the pair of clamping parts 132a of the caulking part 132. Specifically, as shown in FIG. 11(f), the pair of clamping parts 132a are bent inward and plastically deformed until the tips of the pair of clamping parts 132a come into contact with each other. Thereby, the three electric wires can be sandwiched and fixed between the pair of sandwiching portions 132a.

At this time, by tilting the pair of pinch parts 132a inward, a rotational moment is applied to the insertion part 131 such that the pair of first projections 131a and second projections 131b rise, and the brush holder 70 of the insertion part 131 is rotated. There is a possibility that the holding force against the recess may be reduced. In other words, there is a possibility that the holding force of the connection terminal 130 may be reduced by caulking the pair of sandwich portions 132a.

On the other hand, in the present embodiment, as described above, the width W3 of the end of the caulking part 132 on the insertion part 131 side is wider than the width W1 of the end of the insertion part 131 on the caulking part 132 side. ing. Thereby, it is possible to suppress the rotational moment caused by tilting the pair of sandwich portions 132a inward. Therefore, by caulking the pair of sandwiching portions 132a, it is possible to effectively prevent the holding force of the connecting terminal 130 from decreasing.

Note that after the electric wire such as the connecting wire 140 is fixed to the caulking part 132 by caulking, solder may be applied to the connection part between the electric wire and the caulking part 132 and then hardened. Thereby, the bonding strength between the electric wire and the caulked portion 132 can be improved. At the same time, even if the tips of the pair of pinching portions 132a are not closed, it is possible to prevent the electric wire from falling off from the crimped portion 132.

As described above, the electric motor 1 according to the present disclosure includes the above-described connection terminal 130 and one or more electric wires fixed to the caulked portion 132 of the connection terminal 130.

The electric motor 1 also includes a rotor 20 having a rotating shaft 21, a commutator 30 attached to the rotating shaft 21, a brush 40 in contact with the commutator 30, and a resin brush holder 70 holding the brush 40. Equipped with The connection terminal 130 is press-fitted into the brush holder 70 and fixed.

(Modified example)
The electric motor according to the present disclosure has been described above based on the embodiments. However, the present disclosure is not limited to the above embodiments.

For example, in the embodiment described above, the outline of the opposing portions of the pair of pinching portions 132a in the caulking portion 132 of the connection terminal 130 is a straight line. However, it is not limited to this. Specifically, as in the connection terminal 130A shown in FIG. 12, the outline of the opposing portion of the pair of pinching parts 132a in the caulking part 132A may include an arc. FIG. 12 is a plan view of a connection terminal according to a modification. In this case, it is preferable that arcs be formed in opposing portions of the pair of pinch parts 132a so that the width of the pair of pinch parts 132a is narrow. Thereby, the pair of pinching portions 132a can be caulked more easily.

In the above embodiment, the connection terminal 130 is fixed to the brush holder 70. However, it is not limited to this. The article to which the connection terminal 130 is fixed may be any resin component that can be press-fitted with the connection terminal 130.

In the embodiment described above, the connection terminal 130 is a relay terminal inserted into the current path of a plurality of electronic components. However, it is not limited to this. For example, the connection terminal 130 may be used as a power supply terminal.

In the embodiment described above, the electric motor 1 includes a choke coil 110 and a capacitor 120. However, it is not limited to this. That is, the electric motor 1 does not need to have the choke coil 110 and the capacitor 120.

In the embodiment described above, the stator 10 is composed of a magnet. However, it is not limited to this. For example, the stator 10 may include a stator core and a winding wound around the rotor core.

In the above embodiment, the case where the electric motor 1 is used in an automobile has been described. However, it is not limited to this. That is, the electric motor 1 in the embodiment described above can be used not only for electrical equipment mounted on a car but also for various electrical equipment. For example, the electric motor 1 may be used in household electrical equipment, industrial equipment, power tools, and the like.

Other embodiments may be obtained by making various modifications to the above-described embodiments that those skilled in the art would think of, or by arbitrarily combining the components and functions of the embodiments without departing from the spirit of the present disclosure. Forms are also included in this disclosure.

The electric motor according to the present disclosure can be used in various products equipped with the electric motor, including automobiles and the like.

1 Electric motor 10 Stator 20 Rotor 21 Rotating shaft 21a First part 21b Second part 22 Rotor core 22a Teeth 23 Winding 24 Insulator 30 Commutator 31 Commutator piece 40 Brush 40a Front end surface 40b Rear end surface 45 Pigtail wire 50 Brush spring 60 Frame 60a Opening 61 Bearing holding part 70 Brush holder 70a Recess 70b Step part 71 Brush storage part 72 Power terminal arrangement part 73 Coil arrangement part 74 Capacitor arrangement part 75 Connection terminal arrangement part 79 Cover plate 81 First bearing 82 Second bearing 90 Seal member 100 Power supply terminal 110 Choke coil 110a First end 110b Second end 120 Capacitor 121 Main body 122 Lead 130, 130A Connection terminal 131 Insertion part 131a First protrusion 131b Second protrusion 131c Recessed part 132, 132A Caulked part 132a Sandwiching part 132b Recessed part 133 Front 134 Back 140 Connection wire 150 Metal parts

Claims (15)

1. A terminal fixed to a resin part of an electric motor and to which an electric wire placed on the electric motor is connected,
   an insertion portion inserted into the resin component by press fitting;
   a caulking portion that is caulked and holds the electric wire;
   terminal.
2. The insertion portion has a first protrusion that protrudes from one side and the other side of the insertion portion, and a second protrusion that protrudes from the one side and the other side,
   The first protrusion is located closer to the distal end in the insertion direction of the insertion portion than the second protrusion.
   Terminal according to claim 1.
3. The protrusion height of the first protrusion is lower than the protrusion height of the second protrusion.
   Terminal according to claim 2.
4. The insertion portion has a recess between the first protrusion and the second protrusion on each of the one side and the other side.
   Terminal according to claim 2.
5. The width of the end of the insertion part on the caulking part side is wider than the width between the recess on the one side and the recess on the other side.
   The terminal according to claim 4.
6. The caulking part has a pair of sandwiching parts that sandwich the electric wire,
   The pair of pinching portions extend in a direction opposite to the insertion direction of the insertion portion.
   The terminal according to any one of claims 1 to 5.
7. A recessed portion having a width narrower than an interval between the pair of pinching parts is formed at a root portion between the pair of pinching parts.
   The terminal according to claim 6.
8. In the outer shape of the tip of each of the pair of pinch parts, the inner radius of curvature is larger than the outer radius of curvature;
   The terminal according to claim 6.
9. The outline of each opposing portion of the pair of sandwich parts includes a straight line or a circular arc,
   The terminal according to claim 6.
10. The width of the end of the caulking part on the insertion part side is wider than the width of the end of the insertion part on the caulking part side.
    The terminal according to any one of claims 1 to 5.
11. The terminal is composed of a metal plate,
    The front and back surfaces of the caulking portion and the front and back surfaces of the insertion portion are flush with each other;
    The terminal according to any one of claims 1 to 5.
12. The terminal according to any one of claims 1 to 5,
    one or more of the electric wires fixed to the caulked portion of the terminal;
    Electric motor.
13. a rotor having a rotating shaft;
    a commutator attached to the rotating shaft;
    a brush in contact with the commutator;
    A brush holder made of resin that holds the brush,
    The terminal is press-fitted and fixed in the brush holder,
    The electric motor according to claim 12.
14. A power terminal, a choke coil, and a capacitor are arranged in the brush holder,
    The one or more electric wires are at least one of a connection wire connected to the power supply terminal, a coil wire forming the choke coil, and a lead included in the capacitor.
    The electric motor according to claim 13.
15. The one or more electric wires are a plurality of electric wires,
    the plurality of electric wires are stacked in the insertion direction of the insertion section and fixed to the caulking section;
    The electric motor according to claim 14.

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