JP2021145503A - Motor and motor manufacturing method - Google Patents

Abstract

To provide a technique capable of accurately adjusting an axial position of a terminal without being constrained by the position of a stator.SOLUTION: A stator 2 includes a stator core 21, a coil 23, and a metal connection terminal 24. The connection terminal 24 is electrically connected to the end of a lead wire 25 of the coil 23. A housing 4 includes a bearing 43 and a plate-shaped bearing holder 42. The bearing 43 rotatably supports a shaft 31 of a rotor 3. The bearing holder 42 holds the bearing 43 at the radial inner end. The connection terminal 24 is fixed to the bearing holder 42. Therefore, the axial position of the connection terminal 24 can be adjusted accurately without being constrained by the position of the stator 2.SELECTED DRAWING: Figure 4

Description

The present invention relates to a motor and a method for manufacturing the motor.

Conventionally, a structure is known in which an end portion of a conducting wire constituting a coil of a motor is connected to an external circuit board via a metal terminal. Conventional motors having terminals are described, for example, in Japanese Patent No. 6339041. In this publication, terminals (50, 60) are connected to the end wire of the coil (70).
Japanese Patent No. 6339041

However, in the structure of the above publication, the end of the conducting wire is connected to the terminal fixed to the insulator. Therefore, after connecting the end of the conducting wire to the terminal, the position of the terminal is constrained by the stator, and it is difficult to adjust the final position of the terminal according to the circuit board of the connection destination.

An object of the present invention is to provide a technique capable of accurately adjusting the axial position of a terminal without being constrained by the position of the stator.

The first invention of the present application comprises an annular stator arranged around a central axis extending vertically, a rotor rotatably supported around the central axis, and a housing accommodating the stator and the rotor. The motor includes a stator core having an annular core back centered on the central axis, a stator core having a plurality of teeth extending in the radial direction from the core back, and a coil composed of a lead wire wound around the teeth. It has a metal connection terminal that is electrically connected to the end of the lead wire of the coil, the rotor has a shaft extending along the central axis, and the housing rotates the shaft. It has a bearing that can be supported and a plate-shaped bearing holder that holds the bearing at an end portion on the inner side in the radial direction, and the connection terminal is fixed to the bearing holder.

A second invention of the present application is a method for manufacturing a motor having a coil arranged inside a housing and a metal connection terminal. A) The connection terminal is connected to the end of a lead wire of the coil. A step of inserting the connection terminal into the bearing holder constituting the upper surface of the housing, and a step of pulling up the connection terminal with respect to the bearing holder.

According to the first and second inventions of the present application, the connection terminal is fixed to the bearing holder of the housing instead of the stator. Therefore, the axial position of the connection terminal can be adjusted accurately without being constrained by the position of the stator.

FIG. 1 is an external perspective view of the motor. FIG. 2 is a top view of the motor. FIG. 3 is a vertical cross-sectional view of the motor as viewed from the positions AA of FIG. FIG. 4 is a vertical cross-sectional view of the motor as viewed from the position BB of FIG. FIG. 5 is a perspective view of the stator. FIG. 6 is a partial perspective view of the bearing holder. FIG. 7 is a partial vertical sectional view of the connection terminal and the bearing holder. FIG. 8 is a flowchart showing a work flow when fixing the connection terminal. FIG. 9 is a partial vertical sectional view of the motor showing a state when the connection terminal is pulled up.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the present application, the direction parallel to the central axis of the motor is the "axial direction", the direction orthogonal to the central axis of the motor is the "diameter direction", and the direction along the arc centered on the central axis of the motor is the "circumferential direction". , Each. Further, in the present application, the shape and positional relationship of each part will be described with the axial direction in the vertical direction and the bearing holder side facing up with respect to the rotor. However, this definition in the vertical direction does not intend to limit the posture during manufacturing and use of the motor according to the present invention.

Further, the above-mentioned "parallel direction" also includes a substantially parallel direction. Further, the above-mentioned "orthogonal direction" includes a direction substantially orthogonal to each other.

<1. Overall configuration of motor>
FIG. 1 is an external perspective view of a motor 1 according to an embodiment of the present invention. FIG. 2 is a top view of the motor 1. FIG. 3 is a vertical cross-sectional view of the motor 1 as viewed from the positions AA of FIG. FIG. 4 is a vertical cross-sectional view of the motor 1 as viewed from the position BB of FIG. In FIG. 4, the upper part of the shaft 31 is not shown.

The motor 1 is mounted on an automobile, for example, and is used as a drive source for generating a driving force of an electric power steering device. However, the motor of the present invention may be used for applications other than power steering. For example, the motor of the present invention may be used as a drive source for other parts of an automobile, such as a transmission device, a braking device, a traction motor device, an engine cooling fan, or an oil pump. Further, the motor of the present invention may be mounted on home appliances, OA equipment, medical equipment and the like to generate various driving forces.

As shown in FIGS. 1 to 4, the motor 1 has a stator 2, a rotor 3, and a housing 4. The housing 4 is fixed to the frame of the device to be driven. The stator 2 is fixed to the housing 4. The rotor 3 is rotatably supported with respect to the stator 2 and the housing 4.

The stator 2 is an annular unit arranged around the central axis 9. The stator 2 of the present embodiment has a stator core 21, a plurality of insulators 22, a plurality of coils 23, and three connection terminals 24.

The stator core 21 is made of laminated steel plates in which electromagnetic steel plates are laminated in the axial direction. The stator core 21 has an annular core back 211 centered on a central axis 9, and a plurality of teeth 212 extending radially inward from the core back 211. The core back 211 is arranged substantially coaxially with the central axis 9. The plurality of teeth 212 are arranged at substantially equal intervals in the circumferential direction.

The insulator 22 is made of a resin which is an insulator. At least a part of the surface of the stator core 21 is covered with the insulator 22. Specifically, of the surface of the stator core 21, at least the upper surface, the lower surface, and both end surfaces in the circumferential direction of each tooth 212 are covered with the insulator 22.

The coil 23 is composed of a conducting wire wound around the insulator 22. That is, in the present embodiment, a conducting wire is wound around the tooth 212, which is a magnetic core, via an insulator 22. The insulator 22 prevents the teeth 212 and the coil 23 from being electrically short-circuited by interposing between the teeth 212 and the coil 23.

The rotor 3 is a unit that is rotatably supported around the central axis 9 inside the stator 2 in the radial direction. The rotor 3 of the present embodiment has a shaft 31, a rotor core 32, and a plurality of rotor magnets 33.

The shaft 31 is a columnar member extending along the central axis 9. As the material of the shaft 31, for example, a metal such as stainless steel is used. The shaft 31 rotates about the central shaft 9 by being supported by the lower bearing 43 and the upper bearing 44, which will be described later. Further, the lower end portion 311 of the shaft 31 protrudes downward in the axial direction from the housing 4. A device to be driven is connected to the lower end portion 311 of the shaft 31 via a power transmission mechanism such as a gear.

The shaft 31 does not necessarily have to project downward in the axial direction of the housing 4. That is, the upper end portion of the shaft 31 may protrude upward in the axial direction from the housing 4. Further, the shaft 31 may be a hollow member.

The rotor core 32 is made of a laminated steel plate in which electromagnetic steel plates are laminated in the axial direction. The rotor core 32 has a through hole 320 extending in the axial direction in the center thereof. The shaft 31 is press-fitted into the through hole 320 of the rotor core 32. As a result, the rotor core 32 and the shaft 31 are fixed to each other.

The plurality of rotor magnets 33 are located on the outer peripheral surface of the rotor core 32 or inside the rotor core 32. The radial outer surface of each rotor magnet 33 is a magnetic pole surface facing the radial inner end surface of the teeth 212. The plurality of rotor magnets 33 are arranged in the circumferential direction so that the north and south poles are alternately arranged.

When the motor 1 is driven, a drive current is supplied to the coil 23 from a circuit board (not shown) via the connection terminal 24. Then, a rotating magnetic field is generated in the plurality of teeth 212 of the stator core 21. Then, torque in the circumferential direction is generated by the magnetic attraction force and repulsion force between the teeth 212 and the rotor magnet 33. As a result, the rotor 3 rotates about the central axis 9 with respect to the stator 2 and the housing 4.

The housing 4 is a housing that houses the stator 2 and the rotor 3. As shown in FIGS. 1 to 4, the housing 4 has a housing body 41, a bearing holder 42, a lower bearing 43, and an upper bearing 44.

The housing body 41 is a bottomed cylindrical container. As the material of the housing body 41, for example, a metal such as aluminum or stainless steel is used. However, resin may be used instead of metal as the material of the housing 4. The housing body 41 has a bottom plate portion 411 and a side wall portion 412. The bottom plate portion 411 extends in a disk shape substantially perpendicular to the central axis 9 on the lower side in the axial direction than the stator 2. A lower opening 410 is provided in the center of the bottom plate portion 411. The lower opening 410 penetrates the bottom plate portion 411 in the axial direction. The shaft 31 extends axially through the lower opening 410. The side wall portion 412 extends in a cylindrical shape from the radially outer end portion of the bottom plate portion 411 toward the upper side in the axial direction. The stator core 21 is fixed to the inner peripheral surface of the side wall portion 412.

The bearing holder 42 is a plate-shaped member that constitutes the upper surface of the housing 4 and holds the upper bearing 44 at the end portion on the inner side in the radial direction. The bearing holder 42 extends in a disk shape substantially perpendicular to the central axis 9 on the axially upper side of the stator 2. As the material of the bearing holder 42, for example, a metal such as aluminum is used. The peripheral edge of the bearing holder 42 is fixed to the upper end of the side wall 412 of the housing body 41. An upper opening 420 is provided in the center of the bearing holder 42. The upper opening 420 penetrates the bearing holder 42 in the axial direction. The upper end of the shaft 31 is located within the upper opening 420.

The lower bearing 43 is arranged between the housing body 41 and the shaft 31. The lower bearing 43 is located axially lower than the rotor core 32. The upper bearing 44 is arranged between the bearing holder 42 and the shaft 31. The upper bearing 44 is located axially above the rotor core 32.

For the lower bearing 43 and the upper bearing 44, for example, a ball bearing that relatively rotates the outer ring and the inner ring via a plurality of spheres is used. The outer ring of the lower bearing 43 is fixed to the radial inner end of the bottom plate portion 411 of the housing body 41. The outer ring of the upper bearing 44 is fixed to the radial inner end of the bearing holder 42. Further, each inner ring of the lower bearing 43 and the upper bearing 44 is fixed to the shaft 31. As a result, the shaft 31 is rotatably supported with respect to the housing body 41 and the bearing holder 42. However, instead of ball bearings, bearings of other types such as slide bearings and fluid bearings may be used.

<2. About lead bushes and connection terminals>
Next, the lead bush 45 attached to the bearing holder 42 of the housing 4 and the connection terminal 24 of the stator 2 will be described. FIG. 5 is a perspective view of the stator 2. FIG. 6 is a partial perspective view of the bearing holder 42. FIG. 7 is a partial vertical sectional view of the connection terminal 24 and the bearing holder 42.

As shown in FIGS. 1 to 4, 6 and 7, the housing 4 of the present embodiment has a lead bush 45. The lead bush 45 is an elastic resin member. The bearing holder 42 has an opening 421 that penetrates in the axial direction. The lead bush 45 is inserted into the opening 421 of the bearing holder 42. Further, the lead bush 45 is fixed to the bearing holder 42 by fastening bolts. However, the lead bush 45 may be fixed to the bearing holder 42 by another fixing method such as welding. The lead bush 45 has three insertion holes 450. As shown in FIG. 7, each insertion hole 450 penetrates the lead bush 45 in the axial direction.

As shown in FIG. 6, the lead bush 45 has three wall portions 453. The wall portion 453 projects in a cylindrical shape from the upper surface of the lead bush 45 toward the upper side in the axial direction. The insertion hole 450 and the space inside the wall portion 453 are connected in the axial direction. Further, the wall portion 453 has a notch 454 in a part on the inner side in the radial direction. The space inside the wall portion 453 and the space inside the wall portion 453 in the radial direction are connected via a notch 454.

As shown in FIG. 5, the stator 2 of the present embodiment has 12 coils 23. The 12 coils 23 are composed of 6 conductors 25. The six conductors 25 consist of two U-phase conductors that carry a three-phase alternating current U-phase current, two V-phase conductors that carry a V-phase current, and two W-phase conductors that carry a W-phase current. including. Four of the twelve coils 23 are composed of two U-phase conductors. Four of the remaining eight coils 23 are composed of two V-phase conductors. The remaining four coils 23 are composed of two W phase conductors.

The stator 2 has three connection terminals 24. The connection terminal 24 is a conductive metal member. As shown in FIG. 5, one end of the six conductors 25 is drawn axially upward from the coil 23. Then, the one end of each conductor 25 is welded to the connection terminal 24. As a result, the conductor 25 and the connection terminal 24 are electrically connected. In this embodiment, one end of the two U-phase conductors is connected to one connection terminal 24. Also, one end of the two V-phase conductors is connected to the other one connection terminal 24. Further, one end of the two W phase conductors is connected to the remaining one connection terminal 24. The other ends of the six conductors 25 are drawn axially downward from the coil 23 and are electrically connected to each other.

The three connection terminals 24 have the same shape. Each connection terminal 24 has a plate shape extending in the axial direction. As shown in FIG. 7, the connection terminal 24 has a terminal upper portion 51, a terminal intermediate portion 52, and a terminal lower portion 53. The terminal upper portion 51 is located on the uppermost side in the axial direction of the connection terminal 24. The terminal intermediate portion 52 is located below the terminal upper portion 51 in the axial direction. The terminal lower portion 53 is located further downward in the axial direction than the terminal intermediate portion 52. The terminal intermediate portion 52 is wider than the terminal upper portion 51 and the terminal lower portion 53. That is, assuming that the direction orthogonal to the two directions of the thickness direction and the axial direction of the connection terminal 24 is the "width direction", the dimension in the width direction of the terminal intermediate portion 52 is the width direction of the terminal upper portion 51 and the terminal lower portion 53. Larger than the dimensions.

Concavo-convex shape saw blade portions 54 are provided at both ends of the terminal intermediate portion 52 in the width direction. The saw blade portion 54 has a shape in which a plurality of minute protrusions protruding outward in the width direction are arranged in the axial direction. Further, the terminal intermediate portion 52 has a hole portion 55. The hole portion 55 penetrates the terminal intermediate portion 52 in the plate thickness direction of the connection terminal 24 at the center of the terminal intermediate portion 52 in the width direction. The saw blade portion 54 is located below the hole portion 55 in the axial direction.

In the present embodiment, the upper end of the hole 55 has an arc shape. That is, the dimension in the width direction of the upper end of the hole portion 55 gradually becomes wider toward the lower side in the axial direction. In this way, in step S5 described later, the jig 90 is engaged with the center of the upper end portion of the hole portion 55, and the connection terminal 24 can be easily pulled up directly above. Further, since the width of the metal of the connection terminal 24 does not change significantly around the hole 55, the change in electrical resistance can be suppressed.

The three connection terminals 24 are inserted into the three insertion holes 450 of the lead bush 45, respectively. Then, the saw blade portion 54 of the terminal intermediate portion 52 meshes with both end edges of the insertion hole 450 in the width direction. As a result, the terminal intermediate portion 52 of the connection terminal 24 is fixed to the lead bush 45. That is, each connection terminal 24 is fixed to the lead bush 45 in a state of being inserted into the insertion hole 450. Further, the upper portion of the terminal intermediate portion 52 is held by the wall portion 453.

As described above, in the motor 1 of the present embodiment, the connection terminal 24 is fixed not to the insulator 22 of the stator 2 but to the bearing holder 42 of the housing 4. Therefore, the axial position of the connection terminal 24 can be adjusted accurately without being constrained by the position of the insulator 22. When the motor 1 is used, the terminal upper portion 51 of the connection terminal 24 is connected to the circuit board. By fixing the connection terminal 24 not to the insulator 22 of the stator 2 but to the bearing holder 42 of the housing 4, the connection terminal 24 can be accurately positioned with respect to the circuit board.

FIG. 8 is a flowchart showing a work flow when fixing the connection terminal 24 in the manufacturing process of the motor 1. At the time of start in FIG. 8, a portion other than the connection terminal 24 of the stator 2 and the rotor 3 are already arranged inside the housing main body 41. However, the upper part of the housing body 41 is not yet covered with the bearing holder 42.

When fixing the connection terminal 24, first, the connection terminal 24 is connected to one end of each of the three conductors 25 (step S1). As shown in FIGS. 5 and 7, the lower end of the terminal lower portion 53 of the connection terminal 24 has a U-shaped portion 531 folded back in the thickness direction. In step S1, one end of the conducting wire 25 is inserted into the U-shaped portion 531. Then, one end of the inserted conductor 25 is welded to the U-shaped portion 531.

Next, a bearing holder 42 to which the lead bush 45 is attached is prepared. Then, the connection terminals 24 are inserted into the three insertion holes 450 of the lead bush 45 from the lower surface side of the bearing holder 42 (step S2).

As shown in FIG. 7, the insertion hole 450 has an insertion hole upper portion 451 and an insertion hole lower portion 452. The lower part 452 of the insertion hole is located below the upper part 451 of the insertion hole in the axial direction. The widthwise dimension of the insertion hole upper portion 451 is the same as or slightly wider than the widthwise dimension of the terminal intermediate portion 52. The widthwise dimension of the insertion hole lower portion 452 is wider than the widthwise dimension of the insertion hole upper portion 451. That is, the lower part 452 of the insertion hole is wider than the upper part 451 of the insertion hole.

The terminal intermediate portion 52 of the connection terminal 24 is first inserted into the wide insertion hole lower portion 452. As a result, the position of the terminal intermediate portion 52 in the width direction is limited to some extent. Then, after that, the terminal intermediate portion 52 is inserted from the lower portion 452 of the insertion hole to the upper portion 451 of the insertion hole. As a result, the terminal intermediate portion 52 can be smoothly inserted into the upper portion 451 of the insertion hole.

Further, as shown in FIG. 7, the upper end portion of the terminal intermediate portion 52 has a pair of tapered portions 521 that extend obliquely with respect to the axial direction. Therefore, the dimension in the width direction of the upper end portion of the terminal intermediate portion 52 gradually increases toward the lower side in the axial direction. In step S2, the terminal intermediate portion 52 is inserted into the insertion hole upper portion 451 while bringing the tapered portion 521 into contact with both end edges of the lower end portion of the insertion hole upper portion 451. As a result, the terminal intermediate portion 52 can be inserted into the insertion hole upper portion 451 while gradually positioning the position of the terminal intermediate portion 52 in the width direction with respect to the insertion hole upper portion 451. As a result, the terminal intermediate portion 52 can be more smoothly inserted into the upper portion 451 of the insertion hole.

Eventually, when the upper end of the saw blade portion 54 of the terminal intermediate portion 52 is inserted into the insertion hole upper portion 451, the upper end of the saw blade portion 54 meshes with both end edges of the insertion hole upper portion 451 in the width direction. As a result, the connection terminal 24 is temporarily fixed to the lead bush 45 (step S3).

After the three connection terminals 24 are temporarily fixed to the lead bush 45, the operator puts the bearing holder 42 on the upper part of the housing body 41 (step S4). Then, the peripheral edge portion of the bearing holder 42 is fixed to the upper end portion of the side wall portion 412 of the housing body 41. At this time, between the coil 23 and the connection terminal 24, the conducting wire 25 is not in a straight line but in a bent state. Specifically, as shown in FIG. 4, the conductor 25 is in a state of having the first conductor portion 251 and the second conductor portion 252, and the third conductor portion 253.

The first conductor portion 251 extends from the coil 23 in the upward direction in the axial direction. The second conductor portion 252 extends from the upper end portion of the first conductor portion 251 toward a position on the lower side in the axial direction of the connection terminal 24. The third conductor portion 253 extends from the tip end portion of the second conductor portion 252 toward the upper side in the axial direction. The upper end of the third conductor 253 is connected to the U-shaped portion 531 described above. Here, the total length of the second conductor portion 252 and the length of the third conductor portion 253 is longer than the linear distance between the upper end portion of the first conductor portion 251 and the upper end portion of the third conductor portion 253. I will do it. That is, a margin is provided in the total length of the second conductor portion 252 and the third conductor portion 253. As a result, it is possible to prevent excessive tension from being applied to the conductor 25 in the next step S5.

FIG. 9 is a partial vertical sectional view of the motor 1 showing the state of step S5. When the connection terminal 24 is temporarily fixed to the lead bush 45, the hole 55 of the connection terminal 24 is exposed on the upper surface side of the bearing holder 42. Specifically, the hole 55 of the connection terminal 24 is exposed to the notch 454 of the wall 453 of the lead bush 45. The operator engages the L-shaped jig 90 with the hole 55 of the connection terminal 24 through the notch 454. Then, the jig 90 is moved upward in the axial direction. As a result, the connection terminal 24 is pulled upward in the axial direction inside the insertion hole 450 (step S5). At this time, the operator can pull up the jig 90 while checking the position of the hole 55 of the connection terminal 24 through the notch 454.

In step S5, the saw blade portion 54 of the connection terminal 24 moves axially upward with respect to the lead bush 45 while meshing with both end edges in the width direction of the insertion hole upper portion 451. The operator stops the movement of the jig 90 in the axial direction upward at a desired position (step S6). As a result, the connection terminal 24 can be accurately positioned in the axial direction with respect to the insertion hole 450 of the lead bush 45.

<3. Modification example>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

The connection terminal 24 of the above embodiment has a shape having a wide terminal intermediate portion 52 between the terminal upper portion 51 and the terminal lower portion 53. However, the connection terminal 24 may have another shape. For example, the terminal upper portion 51, the terminal intermediate portion 52, and the terminal lower portion 53 may have dimensions in the same width direction.

Further, the connection terminal 24 of the above embodiment was fixed to the lead bush 45 by the saw blade portion 54. However, the connection terminal 24 may be fixed to the lead bush 45 by another method. For example, the connection terminal 24 may be fixed to the lead bush 45 by melting a part of the lead bush 45.

Further, in the above embodiment, the connection terminal 24 is fixed to the metal bearing holder 42 via the resin lead bush 45. However, the bearing holder 42 may be made of resin, and the direct connection terminal 24 may be fixed to the bearing holder 42.

Further, in the above embodiment, the housing body 41 is a single member. However, the housing body 41 may be composed of a plurality of members. For example, the bottom plate portion 411 and the side wall portion 412 may be separate members.

Further, the detailed shape of each member constituting the motor may be different from the shape shown in each figure of the present application. Further, the elements appearing in the above-described embodiments and modifications may be appropriately combined as long as there is no contradiction.

The present invention can be used in motors and methods for manufacturing motors.

1 Motor 2 Stator 3 Rotor 4 Housing 9 Central axis 21 Stator core 22 Insulator 23 Coil 24 Connection terminal 25 Conductor 31 Shaft 32 Rotor core 33 Rotor magnet 41 Housing body 42 Bearing holder 43 Lower bearing 44 Upper bearing 45 Lead bush 51 Terminal upper 52 Terminal intermediate Part 53 Terminal lower part 54 Saw blade part 55 Hole part 251 First conductor part 252 Second conductor part 253 Third conductor part 450 Insertion hole 451 Insertion hole upper part 452 Insertion hole lower part 453 Wall part 454 Notch

Claims (12)

An annular stator placed around a central axis that extends vertically,
A rotor that is rotatably supported around the central axis and
A housing for accommodating the stator and the rotor,
It is a motor equipped with
The stator is
An annular core back centered on the central axis, a stator core having a plurality of teeth extending in the radial direction from the core back, and a stator core.
A coil consisting of a conducting wire wound around the teeth,
A metal connection terminal electrically connected to the end of the conductor of the coil,
Have,
The rotor
It has a shaft that extends along the central axis
The housing is
Bearings that rotatably support the shaft and
A plate-shaped bearing holder that holds the bearing at the inner end in the radial direction,
Have,
The connection terminal is a motor fixed to the bearing holder. The motor according to claim 1.
The bearing holder is a metal member having an opening penetrating in the axial direction.
The housing is
It further has a resin lead bush attached to the opening of the bearing holder body.
The lead bush has an insertion hole that penetrates in the axial direction.
A motor in which the connection terminal is fixed to the lead bush in a state of being inserted into the insertion hole. The motor according to claim 2.
The connection terminal is
At the top of the terminal
The terminal intermediate part located on the lower side in the axial direction of the upper part of the terminal and
The lower part of the terminal located on the lower side in the axial direction of the middle part of the terminal,
Have,
The conductor is connected to the lower part of the terminal and
The terminal intermediate portion is wider than the terminal upper portion and the terminal lower portion.
A motor in which the terminal intermediate portion is fixed to the lead bush. The motor according to claim 3.
The edge of the terminal intermediate portion has a saw blade portion having an uneven shape.
A motor in which the saw blade portion meshes with the edge of the insertion hole of the lead bush. The motor according to claim 4.
The connection terminal is
A motor having a hole portion that penetrates the terminal intermediate portion in the plate thickness direction of the connection terminal. The motor according to claim 5.
The saw blade portion is a motor located below the hole portion in the axial direction. The motor according to claim 5 or 6.
The lead bush is
It has a wall portion that holds the terminal intermediate portion, and has a wall portion.
The wall portion has a notch and
A motor in which the holes are exposed in the notches. The motor according to any one of claims 3 to 7.
A motor in which the width of the upper end portion of the terminal intermediate portion gradually increases toward the downward side in the axial direction. The motor according to claim 8.
A motor in which the width of the upper end of the hole gradually increases toward the downward side in the axial direction. The motor according to any one of claims 3 to 9.
The insertion hole is
The upper part of the insertion hole and
The lower part of the insertion hole located axially lower than the upper part of the insertion hole,
Have,
The terminal intermediate portion is fixed to the upper part of the insertion hole.
The lower part of the insertion hole is wider than the upper part of the insertion hole, the motor. The motor according to any one of claims 2 to 10.
The conductor is
The first conducting wire portion extending from the coil to the upper side in the axial direction,
A second conductor portion extending from the upper end portion of the first conductor portion toward a position on the lower side in the axial direction of the connection terminal, and a second conductor portion.
A third conductor portion extending axially upward from the tip portion of the second conductor portion, and a third conductor portion.
Have,
The upper end of the third conductor is connected to the lower end of the connection terminal.
A motor in which the sum of the length of the second conductor portion and the length of the third conductor portion is longer than the distance between the upper end portion of the first conductor portion and the upper end portion of the third conductor portion. A method of manufacturing a motor having a coil arranged inside a housing and a metal connection terminal.
a) The process of connecting the connection terminal to the end of the lead wire of the coil, and
b) The process of inserting the connection terminal into the bearing holder that constitutes the upper surface of the housing, and
c) The process of pulling up the connection terminal with respect to the bearing holder, and
A manufacturing method.

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