JPWO2018143449A1 - motor - Google Patents

Abstract

In one aspect of the motor of the present invention, the stator includes a first coil lead wire drawn from the first coil of the plurality of coils, and a second coil lead wire drawn from the second coil of the plurality of coils. Have. The insulator includes a core back cover portion that covers at least a part of the core back portion, and a protruding portion that is connected to the core back cover portion and protrudes upward. The first coil lead wire is hooked to an edge on one side in the circumferential direction of the protrusion. The second coil lead wire is hooked to the edge on the other circumferential side of the protrusion. The portion of the first coil lead wire that is on the tip side of the portion hooked by the protruding portion and the portion of the second coil lead wire that is hooked by the protrusion portion are twisted together to form a twisted portion. .

Description

The present invention relates to a motor.

2. Description of the Related Art A motor having a configuration for connecting a pin and a circuit board or the like by electrically connecting a pin with a coil winding end portion entangled with the circuit board or the like is known. For example, Patent Document 1 describes a motor having a binding pin with which a winding end portion of a coil is entangled and a substrate joining pin that is electrically connected to the linking pin and joined to a circuit board.

JP 2010-187434 A

However, when the wire diameter of the coil is relatively large, it is difficult to bind the winding end of the coil to the pin. Moreover, even if the winding end of the coil is entangled with the pin, the pin is easily bent by the force received from the winding end of the coil when it is entangled. For this reason, it may be time-consuming to connect the coil and the circuit board, such as the need to return the bent pin.

In view of the above problems, an object of the present invention is to provide a motor having a structure that can easily connect a coil to another member.

One aspect of the motor of the present invention includes a rotor having a shaft disposed along a central axis extending in the vertical direction, and a stator that faces the rotor via a gap in the radial direction, and the stator includes: A stator core having an annular core back portion and a plurality of teeth portions extending in a radial direction from the core back portion, an insulator attached to the stator core, and a plurality of teeth attached to the teeth portions via the insulator, respectively. A coil, a first coil lead wire drawn from a first coil of the plurality of coils, and a second coil lead wire drawn from a second coil of the plurality of coils, wherein the insulator is A core back cover portion covering at least a part of the core back portion; and an upper side connected to the core back cover portion And the first coil lead wire is hooked on an edge on one circumferential side of the projection portion, and the second coil lead wire is an edge on the other circumferential side of the projection portion. The portion of the first coil lead wire that is on the front end side than the portion that is hooked on the protruding portion and the portion of the second coil lead wire that is hooked on the protrusion portion are connected to each other. Twisted together to form a twisted portion.

According to one aspect of the present invention, a motor having a structure capable of easily connecting a coil to another member is provided.

FIG. 1 is a cross-sectional view showing the blower of the present embodiment. FIG. 2 is a perspective view showing the stator of the present embodiment. FIG. 3 is a view showing a portion of the insulator of the present embodiment, and is a view of the protruding portion as viewed from one side in the circumferential direction. FIG. 4 is a view showing a portion of the insulator of the present embodiment, and is a view of the protruding portion as viewed from the outside in the radial direction. FIG. 5 is a view showing a portion of the insulator of the present embodiment, and is a view of the protruding portion as viewed from above. FIG. 6 is a perspective view showing a stator and a circuit board according to the present embodiment. FIG. 7 is a view showing a portion of an insulator which is another example of the present embodiment, and is a view of the protruding portion viewed from one side in the circumferential direction. FIG. 8 is a view showing a portion of an insulator which is another example of the present embodiment, and is a view of a protruding portion as viewed from above.

The Z-axis direction shown in each figure is the vertical direction. The positive side in the Z-axis direction is “upper side” and the negative side is “lower side”. In the following description, a direction parallel to the Z-axis direction is referred to as “vertical direction Z”. The vertical direction, the upper side, and the lower side are simply names for explaining the relative positional relationship of each part, and the actual layout relationship is a layout relationship other than the layout relationship indicated by these names. May be.

As shown in FIG. 1, the motor 10 of this embodiment is mounted on an air blower 1 including an impeller 20 that can rotate around a central axis J that extends in the vertical direction Z. The impeller 20 includes a cylindrical impeller cup 21 and a plurality of blades 22 arranged on the outer peripheral surface of the impeller cup 21 along the circumferential direction. In the following description, the radial direction around the central axis J is simply referred to as “radial direction”, and the circumferential direction around the central axis J is simply referred to as “circumferential direction”.

In the present embodiment, the motor 10 is an outer rotor type motor. The motor 10 includes a housing 11, a stator support portion 12, a plurality of housing ribs 13, a rotor 30, a stator 40, and a circuit board 70. The housing 11 has a rectangular tube shape extending in the vertical direction Z. The housing 11 surrounds the impeller 20 in the circumferential direction from the radially outer side. The stator support portion 12 supports the stator 40. The stator support portion 12 includes a cylindrical stator support portion main body 12a extending in the vertical direction Z, and a plate-like plate portion 12b extending radially outward from the upper end portion of the stator support portion main body 12a. Two bearings are fixed on the radially inner side of the stator support body 12a. The plurality of housing ribs 13 connect the stator support portion 12 and the housing 11. The plurality of housing ribs 13 are arranged along the circumferential direction.

The rotor 30 includes a shaft 31, a connecting member 34, a rotor cup 32, and a rotor magnet 33. The shaft 31 is disposed along the central axis J. The shaft 31 is rotatably supported around the central axis J by two bearings fixed inside the stator support main body 12a. The connecting member 34 is fixed to the lower end portion of the shaft 31. The impeller cup 21 is fixed to the connecting member 34.

The rotor cup 32 has a cylindrical shape that opens upward, and is disposed on the radially outer side of the stator 40. The rotor cup 32 is disposed on the radially inner side of the impeller cup 21. The rotor cup 32 is fixed to the connecting member 34. The rotor magnet 33 is fixed to the inner peripheral surface of the rotor cup 32. The rotor magnet 33 is disposed on the radially outer side of the stator 40. The rotor magnet 33 faces the stator 40 via a gap in the radial direction. The fixing structure between the rotor 30 and the impeller 20 is not limited to the above configuration.

The stator 40 faces the rotor 30 in the radial direction via a gap. In the present embodiment, the stator 40 is disposed with a gap inside the rotor magnet 33 in the radial direction. The stator 40 includes a stator core 41, an insulator 50, and a plurality of coils 60. The stator core 41 has an annular core back portion 41a and a plurality of teeth portions 41b extending in the radial direction from the core back portion 41a. The core back portion 41a has an annular shape centered on the central axis J. The core back part 41a is fitted and fixed to the outer peripheral surface of the stator support part main body 12a.

In the present embodiment, the tooth portion 41b extends radially outward from the core back portion 41a. As shown in FIG. 2, the radially outer end portion of the tooth portion 41 b is an umbrella portion 41 c that extends on both sides in the circumferential direction. The plurality of tooth portions 41b are arranged at regular intervals over one circumference in the circumferential direction. In the present embodiment, six tooth portions 41b are provided.

The insulator 50 is attached to the stator core 41. The insulator 50 includes a core back cover part 51, a plurality of tooth cover parts 52, a cylindrical part 54, an arm part 56, and a protruding part 55. The core back cover part 51 is substantially cylindrical. The core back cover part 51 covers at least a part of the core back part 41a. In the present embodiment, the core back cover portion 51 covers both surfaces and the outer peripheral surface of the core back portion 41a in the vertical direction Z.

The teeth cover part 52 has a teeth cover part main body 52a and an umbrella cover part 52b. The teeth cover main body 52a has a rectangular tube shape extending radially outward from the core back cover 51. The teeth cover main body 52a opens on both sides in the radial direction. An opening on the radially inner side of the teeth cover main body 52 a opens on the radially inner side surface of the core back cover 51. The teeth portion 41b is passed through the inside of the teeth cover main body 52a. The teeth cover part main body 52a covers the periphery of the part where the coil 60 is mounted in the tooth part 41b. The umbrella cover part 52b extends from the radially outer end of the teeth cover part main body 52a to both sides in the circumferential direction. The umbrella cover portion 52b covers both the upper and lower surfaces Z and the radially inner side surface of the umbrella portion 41c.

The cylindrical portion 54 has a cylindrical shape that protrudes upward from the core back cover portion 51. More specifically, the cylindrical portion 54 protrudes upward from the radially inner edge portion of the core back cover portion 51 and has a cylindrical shape centered on the central axis J. As shown in FIG. 1, the stator support portion main body 12 a is passed through the cylindrical portion 54. As shown in FIG. 2, the cylinder part 54 has the large diameter cylinder part 54a and the small diameter cylinder part 54b. The large diameter cylindrical portion 54 a is connected to the core back cover portion 51. The small diameter cylinder part 54b is connected to the upper end part of the large diameter cylinder part 54a. The outer diameter of the small diameter cylindrical portion 54b is smaller than the outer diameter of the large diameter cylindrical portion 54a.

The cylinder part 54 has a flat part 54c. The flat portion 54c is a portion of the radial direction that faces the protruding portion 55, that is, a portion of the outer peripheral surface that is flat in this embodiment. The flat part 54c is orthogonal to the radial direction. The flat portion 54c is configured such that a part of the cylindrical tube portion 54 is recessed radially inward. The flat portion 54 c is provided from a position away from the upper surface of the core back cover portion 51 to the upper end of the cylindrical portion 54. The flat part 54c straddles the large diameter cylindrical part 54a and the small diameter cylindrical part 54b. A plurality of flat portions 54c are provided side by side in the circumferential direction. In the present embodiment, three flat portions 54c are provided.

The arm portion 56 extends radially outward from the lower end portion of the cylindrical portion 54. The arm portion 56 is connected to the upper surface of the core back cover portion 51. The arm portion 56 is disposed at the same position as the center of the flat portion 54c in the circumferential direction. The upper end portion of the radially inner end portion of the arm portion 56 is connected to the flat portion 54c. The arm part 56 is arrange | positioned for every flat part 54c. That is, in the present embodiment, three arm portions 56 are provided.

As shown in FIG. 3, the protruding portion 55 protrudes upward from the radially outer end portion of the arm portion 56. That is, in the present embodiment, the protruding portion 55 is connected to the core back cover portion 51 via the arm portion 56 and protrudes upward. The protrusion 55 has a plate shape orthogonal to the radial direction. The upper end of the protruding portion 55 is positioned below the upper end of the cylindrical portion 54. The cylinder part 54 and the protrusion part 55 are opposed to each other via the first gap S in the radial direction. More specifically, the protruding portion 55 faces the flat portion 54c with the first gap S interposed therebetween. That is, the flat part 54 c faces the protruding part 55 in the radial direction with the first gap S interposed therebetween.

As shown in FIG. 4, the protrusion 55 has a recess 55 a that is recessed downward from the upper end of the protrusion 55. The recess 55a penetrates the protrusion 55 in the radial direction. The recess 55 a is provided at the center in the circumferential direction of the protrusion 55. The outer shape viewed along the radial direction of the recess 55a is constituted by three of the sides constituting the rectangle. By providing the concave portion 55a, the protruding portion 55 has convex portions 55b and 55c protruding upward at both ends in the circumferential direction.

As shown in FIG. 5, the shape seen from the upper side of the protrusion part 55 is a substantially rectangular shape long in the circumferential direction. The protrusion 55 is curved in a gentle arc shape that protrudes radially outward. Edges on both sides in the circumferential direction of the protrusion 55 have a chamfered shape. More specifically, the edges on both sides in the circumferential direction at the radially inner end of the protrusion 55 are rounded and chamfered.

As shown in FIG. 2, the protrusion part 55 is arrange | positioned between the adjacent teeth parts 41b in the circumferential direction. In more detail, the protrusion part 55 is arrange | positioned in the center of adjacent teeth part 41b in the circumferential direction. A plurality of protrusions 55 are provided along the circumferential direction. In the present embodiment, three protrusions 55 are provided.

In the present embodiment, the insulator 50 is configured by combining two separate members divided in the vertical direction Z. The insulator 50 may be configured by a single member or may be configured by combining three or more separate members.

As shown in FIG. 6, a circuit board 70 is attached to the insulator 50. The circuit board 70 has a disk shape extending in the radial direction. The circuit board 70 is disposed on the upper side of the coil 60. A printed wiring (not shown) is provided on the upper surface of the circuit board 70. The circuit board 70 has a central hole portion 70 a that penetrates the circuit board 70 in the vertical direction Z. The central hole 70a has a circular shape centered on the central axis J. The small diameter cylinder part 54b is passed through the central hole part 70a. Of the lower surface of the circuit board 70, the peripheral edge portion of the central hole portion 70a is in contact with the upper surface of the large-diameter cylindrical portion 54a.

The circuit board 70 has a through hole 70b that penetrates the circuit board 70 in the up-down direction Z and is connected to the central hole 70a. The inner edge of the through hole 70b has a shape that is recessed radially outward from the inner edge of the central hole portion 70a. A plurality of through holes 70b are provided along the circumferential direction. In the present embodiment, three through holes 70b are provided. The shape seen from the upper side of the through hole 70b is substantially rectangular. Each of the upper ends of the plurality of protrusions 55 is passed through the plurality of through holes 70b. The bottom surface of the concave portion 55 a of the projecting portion 55 is substantially in the same position as the top surface of the circuit board 70 in the vertical direction Z.

As shown in FIG. 2, the plurality of coils 60 are respectively attached to the plurality of tooth portions 41 b via the insulator 50. More specifically, the plurality of coils 60 are attached to each of the plurality of teeth cover main bodies 52a. The coil 60 is configured by winding a conducting wire. In the present embodiment, six coils 60 are provided: a first coil 61, a second coil 62, a third coil 63, a fourth coil 64, a fifth coil 65, and a sixth coil 66. The first coil 61 to the sixth coil 66 are counterclockwise as viewed from above, and are the first coil 61, the third coil 63, the fifth coil 65, the second coil 62, the fourth coil 64, and the sixth coil 66. Arranged in order.

The first coil 61 and the second coil 62 are arranged on opposite sides in the radial direction with the central axis J interposed therebetween. The third coil 63 and the fourth coil 64 are arranged on the opposite side in the radial direction across the central axis J. The fifth coil 65 and the sixth coil 66 are disposed on the opposite side in the radial direction with the central axis J interposed therebetween. The first coil 61 to the sixth coil 66 are connected by star connection. The first coil 61 and the second coil 62 are connected in parallel. The third coil 63 and the fourth coil 64 are connected in parallel. The fifth coil 65 and the sixth coil 66 are connected in parallel.

A first coil lead wire 61a is drawn from the first coil 61. A second coil lead wire 62a is drawn from the second coil 62. That is, the stator 40 includes a first coil lead wire 61a drawn from the first coil 61 of the plurality of coils 60, a second coil lead wire 62a drawn from the second coil 62 of the plurality of coils 60, and Have The first coil lead wire 61 a is an end portion of a conducting wire constituting the first coil 61. The second coil lead wire 62 a is an end portion of a conducting wire that constitutes the second coil 62.

The first coil lead wire 61a and the second coil lead wire 62a extend upward from between the coils 60 adjacent in the circumferential direction. In the present embodiment, the first coil lead wire 61 a and the second coil lead wire 62 a extend upward from between the circumferential directions of the first coil 61 and the third coil 63. The first coil lead wire 61 a extends directly upward from the first coil 61. The second coil lead wire 62 a is drawn from the second coil 62 to between the first coil 61 and the third coil 63 in the circumferential direction, and then between the first coil 61 and the third coil 63 in the circumferential direction. Extends upward from

The first coil lead wire 61a is hooked to the edge on one side in the circumferential direction of the protrusion 55, that is, the left edge in FIG. The second coil lead wire 62a is hooked to the edge on the other circumferential side of the protrusion 55, that is, the right edge in FIG. The portion of the first coil lead wire 61a closer to the tip than the portion hooked by the protrusion 55 and the portion of the second coil lead wire 62a closer to the tip of the protrusion 55 are twisted together and twisted. Part 67 is configured.

Since the 1st coil leader line 61a and the 2nd coil leader line 62a are hooked in the projection part 55 from the both sides of the circumferential direction, it is suppressed that a position is disturbed by moving. Thereby, the 1st coil leader line 61a and the 2nd coil leader line 62a can be twisted together in the state where the position was stabilized. Therefore, it is easy to twist the first coil lead wire 61a and the second coil lead wire 62a. Further, since the position of the first coil lead wire 61a and the position of the second coil lead wire 62a can be stabilized, the torsion formed by twisting the first coil lead wire 61a and the second coil lead wire 62a. The position of the part 67 can also be stabilized. Thereby, it is easy to connect the twist part 67 with another member, and the coil 60 and another member can be easily connected. Therefore, according to this embodiment, the motor 10 having a structure that can easily connect the coil 60 to other members is obtained. Thereby, even if the conducting wire which comprises the coil 60 is comparatively thick and the output of the motor 10 is enlarged, the motor 10 can be assembled easily.

In this embodiment, the other member is a circuit board 70. As shown in FIG. 6, in this embodiment, the twisted portion 67 is pulled out from the lower side of the circuit board 70 through the through hole 70 b to the upper side of the circuit board 70, and is connected to the upper surface of the circuit board 70 by the solder 68. . Thereby, the twisted portion 67 is electrically connected to the circuit board 70, and the circuit board 70 is electrically connected to the coil 60. Therefore, in the present embodiment, the connection of the coil 60 to the circuit board 70 can be facilitated.

The twisted portion 67 has a bent portion 67a bent in the radial direction. As shown in FIGS. 2 and 3, the bent portion 67a extends in the radial direction through the recess 55a. In the present embodiment, the bent portion 67a is bent outward in the radial direction through the recess 55a. As shown in FIG. 6, the radially outer end portion of the bent portion 67 a is disposed on the radially outer side than the through hole 70 b and is disposed on the upper side of the circuit board 70. The bent portion 67 a is electrically connected to the upper surface of the circuit board 70 by solder 68. Thus, in this embodiment, since the twist part 67 is arrange | positioned through the recessed part 55a, it can suppress that the twist part 67 moves to the circumferential direction. Therefore, the position of the twisted portion 67 can be further stabilized, and the twisted portion 67 can be more easily connected to the circuit board 70. This makes it easier to connect the coil 60 to the circuit board 70.

In addition, for example, when a coil lead wire is bound to a pin supported by an insulator, the coil lead wire tied to the pin is soldered and connected to the circuit board. In this case, the portion of the insulator that supports the pin is melted by heat due to soldering, and the pin may fall down. As a result, there is a problem that the productivity of the motor is lowered.

On the other hand, according to the present embodiment, the torsion part 67 is separated from the insulator 50 in order to perform soldering to the torsion part 67 obtained by twisting the first coil lead line 61a and the second coil lead line 62a. Thus, heat at the time of soldering the twisted portion 67 can be hardly transmitted to the insulator 50. Therefore, it can suppress that the insulator 50 melt | dissolves and it can suppress that the productivity of the motor 10 falls.

As shown in FIG. 3, at least a part of the first coil lead wire 61 a on the tip side of the portion hooked by the protruding portion 55 is disposed in the first gap S. Similarly, at least a part of the second coil lead wire 62a on the tip side of the portion hooked by the protruding portion 55 is disposed in the first gap S. Therefore, for example, a part of the first coil lead wire 61 a and a part of the second coil lead wire 62 a are arranged between the protruding portion 55 and the cylindrical portion 54 in the radial direction. Thereby, it can suppress that the 1st coil leader line 61a and the 2nd coil leader line 62a move greatly in the diameter direction. Therefore, the position of the first coil lead wire 61a and the position of the second coil lead wire 62a can be further stabilized, and the connection between the coil 60 and the circuit board 70 can be facilitated.

Further, according to the present embodiment, the cylindrical portion 54 has the flat portion 54 c that faces the protruding portion 55 and the first gap S in the radial direction. Therefore, it is easy to sufficiently secure the first gap S between the flat portion 54c and the protruding portion 55. Thereby, it is easy to arrange a part of the first coil lead wire 61a and a part of the second coil lead wire 62a in the first gap S. Further, it is easy to secure a space for twisting the first coil lead wire 61a and the second coil lead wire 62a, and the twisted portion 67 can be easily formed.

Moreover, according to this embodiment, the protrusion part 55 is arrange | positioned between the adjacent teeth parts 41b in the circumferential direction. Therefore, by drawing out the first coil lead wire 61a and the second coil lead wire 62a from between the coils 60 respectively attached to the adjacent tooth portions 41b, the first coil lead wire 61a and the second coil lead wire 62a. Are easily hooked to the edges on both sides in the circumferential direction of the protrusion 55.

Further, according to the present embodiment, since the edges on both sides in the circumferential direction of the protrusion 55 are chamfered, the first coil lead wire 61a and the second coil lead wire 62a can be easily hooked on the protrusion 55. Further, when the first coil lead wire 61a and the second coil lead wire 62a are hooked on the protrusion 55, the first coil lead wire 61a and the second coil lead wire 62a are prevented from being damaged at the corners of the protrusion 55. it can.

In the present embodiment, the first coil 61 and the second coil 62 are each configured by winding a plurality of conductive wires. The first coil lead wire 61a and the second coil lead wire 62a are composed of a plurality of conducting wires. Here, when the output of the same motor 10 is obtained, it is more preferable to configure a coil lead wire by combining a plurality of relatively thin lead wires than to form a coil lead wire with a relatively thick single lead wire. The bending strength of the wire can be reduced. Therefore, the first coil lead wire 61a and the second coil lead wire 62a can be easily twisted together by configuring the first coil lead wire 61a and the second coil lead wire 62a with a plurality of conductive wires.

Further, even when the first coil lead wire 61a and the second coil lead wire 62a are constituted by a plurality of conducting wires, the position of the first coil lead wire 61a and the second coil lead wire can be obtained by being hooked by the protrusion 55. Since the position of the wire 62a can be stabilized, it is possible to suppress a plurality of conductive wires from being scattered.

In the present embodiment, the first coil 61 and the second coil 62 are each configured by winding two conductive wires. The first coil lead wire 61a and the second coil lead wire 62a are each composed of two conductive wires. That is, in the present embodiment, the twisted portion 67 is configured by twisting four conductive wires.

Each configuration of the third coil 63 to the sixth coil 66 is the same as that of the first coil 61 and the second coil 62 described above. That is, coil lead lines are also drawn from the third coil 63, the fourth coil 64, the fifth coil 65, and the sixth coil 66, respectively. The third coil lead wire drawn from the third coil 63 and the fourth coil lead wire drawn from the fourth coil 64 extend upward from between the circumferential directions of the third coil 63 and the fifth coil 65. The third coil lead wire and the fourth coil lead wire are connected to the first coil lead wire 61a and the first coil lead wire 61a and the first coil lead wire 61a and the second coil lead wire 62a. It is hooked in the same manner as the two-coil lead wire 62a. The third coil lead wire and the fourth coil lead wire are twisted together to form a twisted portion 67.

The fifth coil lead wire drawn from the fifth coil 65 and the sixth coil lead wire drawn from the sixth coil 66 extend upward from between the circumferential directions of the fifth coil 65 and the second coil 62. The fifth coil lead line and the sixth coil lead line include a first coil lead line 61a and a second coil lead line 62a, and a protruding portion 55 on which the third coil lead line and the fourth coil lead line are respectively hooked. Is hooked to another protrusion 55 in the same manner as the other coil leaders. The fifth coil lead wire and the sixth coil lead wire are twisted together to form a twisted portion 67. Each configuration from the third coil lead wire to the sixth coil lead wire is the same as the configuration of the first coil lead wire 61a and the configuration of the second coil lead wire 62a.

A twisted portion 67 in which the first coil lead wire 61a and the second coil lead wire 62a are twisted together, a twisted portion 67 in which the third coil lead wire and the fourth coil lead wire are twisted together, and a fifth coil lead wire and the first The torsion part 67 in which the 6-coil lead wires are twisted together functions as U-phase, V-phase, and W-phase power supply wirings, respectively. The assignment of each phase to each twisted portion 67 is not particularly limited.

As described above, the motor 10 of this embodiment is an outer rotor type motor having the rotor magnet 33 disposed on the radially outer side of the stator 40. Therefore, the motor 10 is suitably used as a motor for the blower 1 that rotates the impeller 20. Moreover, since the conducting wire which comprises the coil 60 can be comparatively thick as mentioned above and the output of the motor 10 is easy to be enlarged, the high output air blower 1 is obtained.

The present invention is not limited to the above-described embodiment, and other configurations can be employed. In addition, about the structure similar to the above-mentioned embodiment, description may be abbreviate | omitted by attaching | subjecting the same code | symbol suitably.

Other members to which the coil 60 is connected may be members other than the circuit board 70. The other member may be, for example, a terminal connected to an external device or a bus bar connected to the circuit board 70. Further, the circuit board 70 may not be provided. The coil 60 may be configured by winding one conductive wire, or may be configured by winding three or more conductive wires. In addition, each coil lead wire may be composed of one conducting wire, or may be composed of three or more conducting wires. Further, the twisted portion 67 may be connected to the circuit board 70 by a method other than the solder 68. Further, the twisted portion 67 may not have the bent portion 67a. In this case, the twisted portion 67 may have a shape extending upward.

Further, in the above-described embodiment, the two coil lead wires constituting the twisted portion 67 are two coil lead wires drawn from the two coils 60 arranged on the opposite side in the radial direction across the central axis J. However, it is not limited to this. The two coil lead lines constituting the twisted portion 67 may be two coil lead lines drawn from two coils 60 adjacent in the circumferential direction. In this case, for example, the first coil 61 from which the first coil lead wire 61a is drawn and the second coil 62 from which the second coil lead wire 62a is drawn are adjacent to each other in the circumferential direction.

A plurality of coils are provided between the coils 60 adjacent to each other in the circumferential direction. Specifically, the same number of coils 60 is provided between the coils. In the embodiment described above, the two coil lead wires constituting the torsion portion 67 are configured to extend upward from between the same coils, but are not limited thereto. Each coil lead line may extend from between any of the coils. That is, the two coil lead wires constituting the twisted portion 67 may extend upward from between different coils. As an example, the first coil lead wire 61a extends upward from between the coils of the first coil 61 and the third coil 63 adjacent in the circumferential direction, and the second coil lead wire 62a is adjacent to the third coil 63 in the circumferential direction. It may be configured to extend upward from between the coils with the fifth coil 65. Further, each coil lead wire may be drawn in any way as long as it is hooked on the protrusion 55. That is, each coil lead line does not need to extend upward from between the coils.

The arm portion 56 may extend radially outward from the cylindrical portion 54 at a position away from the upper surface of the core back cover portion 51. In this case, the protruding portion 55 is connected to the core back cover portion 51 via the arm portion 56 and the cylindrical portion 54. Moreover, the arm part 56 does not need to be provided. In this case, the protruding portion 55 may be directly connected to the core back cover portion 51 and protrude upward from the upper surface of the core back cover portion 51. Moreover, the cylinder part 54 does not need to be provided. Moreover, the protrusion part 55 does not need to have the recessed part 55a. Further, only one protrusion 55 may be provided, or four or more may be provided.

Further, the insulator 50 may have a configuration like the insulator 150 shown in FIGS. 7 and 8. As shown in FIGS. 7 and 8, the insulator 150 includes a rib 158 that connects the cylindrical portion 54 and the protruding portion 55 in the first gap S. Thereby, the rigidity of the radial direction of the protrusion part 55 can be improved. When the first coil lead wire 61a and the second coil lead wire 62a are hooked on the protrusion 55 and the first coil lead wire 61a and the second coil lead wire 62a are twisted together, the protrusion 55 has a radial direction. An outward force is applied. On the other hand, in the insulator 150, the ribs 158 can improve the radial rigidity of the protruding portion 55. Therefore, when the first coil lead wire 61a and the second coil lead wire 62a are twisted together, the protrusion 55 Can be prevented from being deformed in the radial direction.

As shown in FIG. 8, the rib 158 extends in the radial direction. As viewed from above, the dimension in the direction orthogonal to the radial direction of the rib 158, that is, the dimension in the left-right direction in FIG. 8 is smaller than the dimension in the direction orthogonal to the radial direction of the protrusion 55. The rib 158 connects the center in the circumferential direction of the flat portion 54 c and the center in the circumferential direction of the protruding portion 55. As shown in FIG. 7, the upper end part of the rib 158 is arrange | positioned below the recessed part 55a.

The application of the motor of the embodiment described above is not particularly limited, and may be used for devices other than the blower. Further, the motor of the embodiment described above may be an inner rotor type motor. Moreover, each structure mentioned above can be suitably combined in the range which is not mutually contradictory.

DESCRIPTION OF SYMBOLS 10 ... Motor, 30 ... Rotor, 31 ... Shaft, 33 ... Rotor magnet, 40 ... Stator, 41 ... Stator core, 41a ... Core back part, 41b ... Teeth part, 50, 150 ... Insulator, 51 ... Core back cover part, 54 ... Cylinder part, 54c ... flat part, 55 ... projection part, 55a ... concave, 60 ... coil, 61 ... first coil, 61a ... first coil leader, 62 ... second coil, 62a ... second coil leader, 67 ... Twist part, 67a ... Bending part, 70 ... Circuit board, 158 ... Rib, J ... Central axis, S ... First gap, Z ... Vertical direction

Claims (10)

A rotor having a shaft disposed along a central axis extending in the vertical direction; and a stator facing the rotor via a gap in a radial direction, wherein the stator includes an annular core back portion and the core back portion. A stator core having a plurality of teeth extending radially from the insulator, an insulator attached to the stator core, a plurality of coils respectively attached to the plurality of teeth via the insulator, and a plurality of the coils A first coil lead wire drawn from the first coil; and a second coil lead wire drawn from the second coil of the plurality of coils; and the insulator includes at least a part of the core back portion. A core back cover part to be covered; connected to the core back cover part; The first coil lead wire is hooked on an edge on one circumferential side of the projection, and the second coil lead wire is on an edge on the other circumferential side of the projection. The portion of the first coil lead wire that is more distal than the portion that is hooked by the protruding portion and the portion of the second coil lead wire that is hooked by the protruding portion are twisted together. A motor that is combined to form a twisted portion. The insulator has a cylindrical tube portion protruding upward from the core back cover portion, and the tube portion and the protruding portion are opposed to each other via a first gap in a radial direction, and the first coil lead-out At least a portion of a portion of the wire that is hooked to the protruding portion and a portion of the second coil lead wire that is hooked to the protruding portion of the second coil lead wire is at least a portion of the first gap. The motor according to claim 1, wherein The cylindrical portion is cylindrical, and has a flat portion in which a part of a surface facing the protruding portion in the radial direction is flat, and the flat portion includes the protruding portion and the first gap. The motor according to claim 2, which is opposed to each other in a radial direction via the. 4. The motor according to claim 2, wherein the insulator has a rib that connects the cylindrical portion and the protruding portion in the first gap. 5. 5. The circuit board according to claim 1, further comprising a circuit board electrically connected to the coil and disposed on an upper side of the coil, wherein the twisted part is electrically connected to the circuit board. The motor described. The protrusion has a recess recessed downward from the upper end of the protrusion, the recess penetrates the protrusion in the radial direction, and the twisted portion is a bent portion bent in the radial direction. The motor according to claim 5, wherein the bent portion extends in a radial direction through the concave portion and is electrically connected to an upper surface of the circuit board. The said protrusion part is a motor as described in any one of Claim 1 to 6 arrange | positioned between the said teeth parts adjacent in the circumferential direction. The motor according to any one of claims 1 to 7, wherein edges on both sides in the circumferential direction of the protruding portion have a chamfered shape. The first coil and the second coil are each configured by winding a plurality of conductive wires, and the first coil lead wire and the second coil lead wire are each configured by a plurality of conductive wires. The motor according to any one of 8. 10. The motor according to claim 1, wherein the teeth portion extends radially outward from the core back portion, and the rotor includes a rotor magnet disposed radially outward of the stator.

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