TWI818137B - Stator, motor and its air supply device - Google Patents

Abstract

The present disclosure provides a stator, a motor and an air supply device thereof. The stator includes: an iron core in an annular shape; a winding wire wound around the iron core; an insulator to insulate the iron core and the winding wire; a circuit board; a terminal pin, connecting the winding and the circuit board; a lead, leading out from the circuit board and connected to the circuit board, wherein the insulator is provided with a hole for fixing the lead to the The annular protruding portion protrudes from the outer peripheral side. The present disclosure can suppress the influence of the force applied to the lead on the circuit board, thereby enabling the circuit board to be miniaturized.

Description

Stator, motor and its air supply device

The present disclosure relates to a stator, a motor and an air supply device thereof.

The existing known method of fixing motor wires (leads) is to fix the wires on the circuit board.

The conventional wire fixing method will be described below with reference to FIG. 9 .

As shown in FIG. 9 , background technology (Patent Document 1: Patent Publication No. JP2014-510957) discloses a stator 100 and a shaft 102 under the action of a rotating magnetic field generated by a winding 101 wound around the stator 100 The rotating rotor 103 is arranged above the coil 101 of the stator 100 and maintains a certain distance from the circuit board 104 with wires. The wires are collected by the protective sleeve 105, and the protective sleeve 105 is fixed on the sleeve fixing part 106 of the circuit board 104 through a tie tie 107.

In the above-mentioned existing lead fixing method, the force exerted by the wires will affect the circuit board 104, so the fixing strength between the circuit board 104 and the stator 100 must be strengthened. As a result, when miniaturizing the circuit board 104, the design freedom will be limited.

In view of the above technical problems, the purpose of this disclosure is to provide a stator, a motor and an air blowing device thereof. The present disclosure can suppress the impact of lead force on the circuit board, and is beneficial to miniaturization of the circuit board, thereby reducing material costs.

In order to achieve the above object, the technical solution adopted by the present disclosure is as follows: According to one aspect of the present disclosure, a stator is provided, including: an iron core in an annular shape; a winding wire wound around the iron core; an insulator to make the iron core and Insulation between the windings; circuit board; terminal pins, connecting the windings and the circuit board; leads, led out from the circuit board and connected to the circuit board, wherein the insulator is provided with protruding to the annular outer peripheral side for fixing the leads protuberance.

In certain embodiments of the present disclosure, the protrusion projects further toward the periphery of the circuit board than the periphery of the circuit board.

In some embodiments of the present disclosure, the circuit board includes: a back side facing the iron core; and a surface facing away from the iron core; the leads are connected to the back side and are located on the circuit board between the back surface and a fixed plane on the circuit board side of the protrusion.

In some embodiments of the present disclosure, the protrusion includes: the fixing plane closer to the iron core than the back surface, and the lead is fixed on the fixing plane.

In some embodiments of the present disclosure, the fixation plane includes: A curved surface that curves toward the outer circumferential direction and toward the iron core.

In some embodiments of the present disclosure, the circuit board includes: a back side facing the iron core; and a surface facing away from the iron core; the leads are connected to the surface, and the protrusions are provided with the circuit board The surface to which the leads are connected is on a fixed plane on the same plane, and the leads are fixed on the fixed plane.

In some embodiments of the present disclosure, the protruding portion includes a root portion protruding from the insulator toward the outer peripheral side, and a restricting portion protruding from the outer peripheral side of the root portion in an annular tangential direction, and the lead wire is fixed within the restricting portion on the root portion. Peripheral contraction site.

In some embodiments of the present disclosure, the tangential width of the root is smaller than the diameter of the lead.

In some embodiments of the present disclosure, the insulator further includes a protrusion provided on the inner peripheral side of the protrusion for limiting the position of the circuit board.

According to another aspect of the present disclosure, a motor is also provided, which is provided with the above-mentioned stator.

According to another aspect of the present disclosure, an air blowing device provided with the above-mentioned motor is also provided.

It can be seen from the above technical solution that the stator, motor and air supply device of the present disclosure have at least one of the following beneficial effects: (1) Through the stator structure of the present disclosure, the influence of the lead stress on the circuit board can be suppressed, so that the circuit board The electrical connections on the machine can be protected; (2) In the present disclosure, the protruding portion protrudes further toward the outer circumference than the outer circumference of the circuit board. The fixation of the lead wire will not affect the assembly of the circuit board and the iron core. The combination of the lead wire and the root of the protruding portion is easier; (3) The lead wire can be arranged horizontally. , no extra load will be caused to the lead due to bending; (4) Since the lead is fixed on the shrinkage part on the inner circumferential side of the restriction part, the reliability of the fixation is improved; (5) Since the width of the root in the tangential direction is larger than that of the lead The diameter is small, so the movement of the fixed lead circle in the tangential direction is restricted, thereby improving the fixing strength of the lead; (6) The protrusions provided on the insulator restrict the movement of the circuit board in the tangential direction of the iron core ring , improving the fixing strength of the circuit board; (7) The lead can be between the circuit board and the insulator, which can reduce the overall height of the motor; because the part of the fixed plane close to the outer diameter of the insulator is the plane of the fixed lead, and the part far away from the outer diameter of the insulator Part of it is bent downward toward the core side, which can reduce the bending load caused by the lead being pressed in the height direction of the stator.

[Existing technology]

100:Stator

101: Winding

102:Shaft

103:Rotor

104:Circuit board

105:Protective sleeve

106: Casing fixing part

107: Tie

[Invention]

1a, 1b: stator

2:Iron core

8:Yoke part

3: Winding

4: Circuit board

15a, 15b: Gap

19:Surface

23:Thickness

5:Terminal pins

6:Lead

7: Insulator

9:Protrusion

13: Lead fixing plane

21:Restriction Department

22: Root

11: Insulator outer diameter

12: Insulator outer diameter side end surface

14:Insulator inner diameter end face

10a, 10b:Protruding part

20:Central axis

30: Back

31: Curved surface

Figure 1 is a plan view of a stator according to the first embodiment of the present disclosure.

FIG. 2 is an oblique appearance view of an insulator according to the first embodiment of the present disclosure.

Figure 3 is a partial plan view of the stator according to the first embodiment of the present disclosure.

Figure 4 is an A-A cross-sectional view of the stator according to the first embodiment of the present disclosure.

Figure 5 is a plan view of a stator according to a second embodiment of the present disclosure.

Figure 6 is a perspective view of an insulator according to the second embodiment of the present disclosure.

Figure 7 is a partial plan view of a stator according to a second embodiment of the present disclosure.

Figure 8 is an A-A cross-sectional view of the stator according to the second embodiment of the present disclosure.

FIG. 9 is a schematic diagram of a lead fixing structure in a known technology.

In order to make the purpose, technical solutions and advantages of the present disclosure more clear, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. In addition, the following embodiment is only one of the specific examples of the present disclosure and does not limit the technical scope of the present disclosure. In all the drawings, the same symbol for the same component will not be described more than twice or will be abbreviated. Furthermore, in the drawings, components not directly related to the present disclosure will not be described in detail.

First embodiment

In a first embodiment of the present disclosure, a stator 1a is provided. Figure 1 is a plan view of a stator according to the first embodiment of the present disclosure. As shown in Figure 1, the stator 1a of the present disclosure includes: an iron core 2 (ie, a stator core), a winding 3, a circuit board 4, a terminal pin 5, a lead wire 6 and an insulator 7. The stator 1a forms part of the motor.

The iron core 2 is formed by integrally molding a yoke portion 8 located on the outer periphery of the stator 1 a and a tooth portion (not shown in the figure) protruding from the yoke portion 8 inwardly, and is formed by connecting a plurality of divided iron cores in an annular shape. The iron core 2 may be formed by processing a plurality of linear divided iron cores composed of adjacent yoke parts 8 into an annular shape, or may be formed by connecting the yoke parts 8 of a plurality of individual divided iron cores in an annular shape. The outer circumference of the iron core 2 is generally cylindrical, including a top surface formed by a surface located on one side of the cylindrical shape, a bottom surface opposite to the top surface, and an outer peripheral side surface connecting the top surface and the bottom surface on the outer peripheral side. In addition, the iron core 2 also includes a cylindrical space connected around the center of the top surface that forms the motor shaft and the center of the bottom surface that also forms the motor shaft. The above space is surrounded by The inner peripheral side surface of the iron core 2 is formed. In other words, when viewed from the axial direction, the iron core 2 has an annular top surface and a bottom surface, and the rotor (not shown in the figure) is located in the space around the axis.

The insulator 7 mainly covers the range from the yoke portion 8 of the iron core 2 to the tooth portion. The winding 3 is wound around the plurality of teeth with the insulator 7 as an intermediary (the insulator 7 is separated), wherein the insulator 7 electrically insulates the iron core 2 and the winding 3 . The insulator 7 is the same as the iron core 2 and has an annular shape corresponding to the divided iron core. The annular insulator 7 has a protrusion 9 on its outer circumference for fixing the lead 6, and protrusions 10a and 10b for positioning the circuit board as shown in FIG. 2 .

The winding 3 is a conductor made of copper or aluminum alloy as the main material, and is wound around the iron core 2 with the insulator 7 as an intermediary. In addition, the winding specifications of the winding 3 can be changed according to the required specifications.

The circuit board 4 connects the winding 3 with an external circuit such as an inverter circuit by connecting a plurality of electrical contacts. The outer outline of the circuit board 4 is a hollow circular part with a central angle of approximately 160°, that is, a partial annular shape. The circuit board 4 is concentric with the central axis 20 of the iron core 2 and is arranged on a plane perpendicular to the central axis 20 at a certain distance from the central axis 20 toward the iron core 2 . The circuit board 4 is fixed to the end of the top surface of the insulator 7 and is in a position consistent with the annular shape, that is, it is fixed to the outer peripheral portion of the top surface, and the circuit board 4 is on the opposite side facing the insulator 7 and the iron core 2 The surface 19 is connected with the lead 6, and the lead 6 is led out from the circuit board 4. As shown in FIG. 3 , the circuit board 4 also includes notches 15 a and 15 b that match the protrusions 10 a and 10 b on the insulator 7 .

In order to deliver external power to the circuit board 4, the ends of the lead wires 6 are connected to the electrical contacts of the circuit board 4 accordingly.

The terminal pins 5 are fixed on the top of the insulator 7 , that is, on the surface of the insulator 7 opposite to the circuit board 4 , and stand upright toward the direction of the circuit board 4 and are arranged parallel to the central axis 20 , that is, arranged along the axial direction. The terminal pins 5 mainly made of conductive material are electrically connected to the winding 3 and the copper foil on the circuit board 4 respectively, so that the winding 3 and the circuit board 4 are electrically connected.

The insulator 7 will be described in detail below with reference to FIG. 2 . Figure 2 is an oblique appearance view of an insulator according to an embodiment of the present disclosure.

The protruding portion 9 of the insulator 7 is T-shaped, and the protruding portion 9 is provided on a surface near the end of the insulator 7 in the axial direction and perpendicular to the central axis 20 , that is, on the top surface (or bottom surface) of the insulator 7 .

The protruding portion 9 protrudes toward the outer circumference side, that is, toward the yoke portion 8 , starting from the insulator outer diameter 11 of the annular outermost circumference of the insulator 7 . The protruding portion 9 is T-shaped when viewed from the top. The T-shaped head portion forms a restricting portion 21 on the outer peripheral side of the protruding portion 9. The T-shaped leg portion is connected to the insulator outer diameter 11 to form a root portion 22, and is formed from the insulator. 7 protrudes toward the outer peripheral side. The restricting portion 21 protrudes from the outer peripheral end of the root portion 22 to both sides of the annular shape of the iron core 2 in the tangential direction. Since the restricting portion 21 protrudes from the root portion 22 , a constricted portion is formed on the protruding portion 9 . In addition, it is preferable that the width of the root portion 22 in the tangential direction is smaller than the width of the lead 6 . The protrusion 9 has a sufficient thickness in the axial direction of the insulator 7 and is provided with a fixing plane 13 .

The fixing plane 13 is on the protrusion 9 in the axial direction of the insulator 7 and is higher than the outer diameter side end surface 12 of the insulator located on the top surface of the insulator 7 on which the circuit board 4 is arranged, and has the same thickness as the circuit board 4 plane formed by height.

In addition, a protrusion 10a protruding in the axial direction of the insulator 7 is provided on the inner circumferential side of the protrusion 9 on the outer diameter side end surface 12 of the insulator, and within the insulator on the inner diameter side of the top surface of the circuit board 4 The radial end surface 14 is provided with a protrusion 10 b protruding from the upper surface of the insulator 7 in the axial direction of the insulator 7 . When the circuit board 4 is assembled to the insulator 7 , the protrusions 10 a and 10 b restrict the movement of the circuit board 4 in the radial direction and the circumferential direction of the circuit board 4 . As a specific implementation of this implementation, the protruding portion 10 a is provided on the outer diameter side end surface 12 of the insulator and in the middle of the circumferential direction of the protruding portion 9 . At the same time, the protruding portion 10b It is disposed on the inner diameter side end surface 14 of the insulator and faces the protruding portion 10a. That is to say, the protruding portion 10b is provided on the line connecting the protruding portion 10a and the central axis 20.

The following will describe in detail the situation after the circuit board 4 is assembled on the insulator 7 with reference to FIGS. 3 and 4 . Figure 3 is a partial plan view of the stator, and Figure 4 is an A-A cross-sectional view of the stator.

In order to fix the circuit board 4 on the insulator 7, the circuit board 4 is provided with notches recessed from the inner diameter and the outer diameter of the partial annular shape toward the inside of the circuit board 4, including notches 15a and notches 15b respectively. The positions and sizes of the notches 15 a and 15 b correspond to the protrusions 10 a and 10 b provided on the insulator 7 . That is to say, when assembling the circuit board 4, the notches 15a and 15b on the circuit board 4 are engaged with the protrusions 10a and 10b on the insulator 7 respectively, thereby determining the position of the circuit board in the diameter direction and the circumferential direction. . Furthermore, the position of the circuit board 4 in the axial direction is determined by bringing the circuit board 4 into contact with the insulator outer diameter side end surface 12 and the insulator inner diameter side end surface 14 . When the circuit board 4 is assembled, the protruding portion 9 protrudes toward the outer circumference of the circuit board 4 but is positioned toward the inner circumference of the iron core 2 . In addition, since the fixing plane 13 protrudes from the outer diameter side end surface 12 of the insulator in the axial direction at the same height as the thickness 23 of the circuit board 4 , the fixing plane 13 of the protrusion 9 is on the same plane as the surface 19 of the circuit board 4 .

In the structure described above, the lead 6 arranged across the fixing plane 13 and the surface 19 is tightened with the root 22 by using restraints such as a rope or a tie at the shrinkage portion on the inner circumferential side of the restricting portion 21 of the protruding portion 9 Together, the lead 6 is fixed on the insulator 7 , that is, the lead 6 is fixed on the fixing plane 13 .

With the above structure, even if the lead wire 6 is subjected to external force such as pulling or vibration due to motor operation, the force is absorbed by the insulator 7 and therefore does not affect the circuit board 4 connected to the lead wire 6 . Therefore, the electrical connection locations on the circuit board 4 which are more fragile than the insulator 7 due to the presence of multiple electrical connection locations can be protected.

In addition, because the protruding portion 9 protrudes further from the outer periphery of the circuit board 4, when the root portion 22 is bound with a rope or a tie, the assembly of the circuit board and the core 2 will not be affected. Therefore, the bonding of the lead 6 and the root 22 is easier.

Since the surface 19 of the circuit board 4 and the fixing plane 13 are on the same horizontal plane, the leads 6 can be arranged horizontally without causing additional load on the leads 6 due to bending.

Since the lead wire 6 is fixed to the shrinkage portion on the inner circumferential side of the restriction portion 21 by the binding rope or the tie, the binding rope or the tie can be prevented from being pulled out in the outer circumferential direction, thereby improving the reliability of the fixation.

In addition, since the width of the root 22 in the tangential direction is smaller than the diameter of the lead 6 , the movement of the fixed lead 6 in the circular tangential direction is restricted, thereby improving the fixing strength of the lead 6 .

Since the insulator 7 is provided with the protrusions 10a and 10b for fixing the circuit board 4 on a straight line from the center of the inner circumference of the protrusion 9 to the central axis, the movement of the fixed circuit board 4 in the tangential direction is restricted, thereby improving the The fixing strength of the circuit board 4 on the insulator 7.

Second embodiment

A second embodiment of the present disclosure provides a stator 1b. Hereinafter, as shown in FIG. 5 , the different features of the stator 1 b in the second embodiment and the stator 1 a in the first actual rotation example will be mainly described. Fig. 5 is a plan view of the stator 1b in the second embodiment of the present disclosure.

The stator 1 b includes an iron core 2 , windings 3 , a circuit board 4 , terminal pins 5 , lead wires 6 and an insulator 7 . A protrusion 9 for fixing the lead wire 6 is provided on the outer peripheral side of the annular insulator 7 .

As shown in FIG. 6 , the protruding portion 9 of the insulator 7 has a T-shape. In this embodiment, the shape of the protruding portion 9 is different from that of the protruding portion 9 described in the first embodiment. And, in this embodiment, for determining the electrical The positions of the protruding portion 10a and the protruding portion 10b at the road plate position are different from those described in the first embodiment. The above differences will be described in detail later.

The circuit board 4 connects the winding 3 with an external circuit such as an inverter circuit by connecting a plurality of electrical contacts. External circuits such as inverter circuits are located on the circuit board 4 . The outer outline of the circuit board 4 is a part of a hollow circle with a central angle of approximately 160°, that is, a partial annular shape. In other words, the circuit board 4 is an arc-shaped plate body with a central angle of approximately 160°. The circuit board 4 is fixed on the top side end of the insulator 7, that is, it is placed and fixed on the outer peripheral portion of the top surface. In other words, the circuit board 4 is located on the outside of the top surface of the insulator 7, and the outside is along the central axis. 20 is away from the side of the top surface of the insulator 7. As shown in Figure 7, the circuit line 4 also includes notches 15a and notches 15b that are different from the first embodiment.

Hereinafter, the insulator 7 will be described in detail with reference to FIG. 6 . FIG. 6 is an oblique appearance view of the insulator in this embodiment.

The protruding portion 9 is provided on the surface near the end of the insulator 7 and perpendicular to the central axis 20 in the axial direction of the insulator 7; that is, the protruding portion 9 is provided on the outer wall surface of the insulator 7, and the outer wall surface is the circumferential surface of the insulator 7 surrounding the central axis. 20 on the outer surface.

The protruding portion 9 protrudes toward the outer circumference side, that is, toward the yoke portion 8 , starting from the insulator outer diameter 11 of the annular outermost circumference of the insulator 7 . That is, the protrusion 9 protrudes from the outer wall surface of the insulator 7 to the outer peripheral side, and the outer peripheral side refers to the side away from the outer wall surface of the insulator 7 in the radial direction of the insulator 7 .

The protruding portion 9 has a T-shape when viewed from the top surface, that is, when viewed along the central axis 20 from the top to the bottom of the insulator 7 , the protruding portion 9 has a T-shape.

The T-shaped head forms a restriction portion 21 on the outer peripheral side of the protruding portion 9 , which refers to the side away from the outer wall surface of the insulator 7 in the radial direction of the insulator 7 . The T-shaped leg portion is connected to the insulator outer diameter 11 to form a root portion 22 and protrudes from the insulator 7 to the outer peripheral side. That is, the root 22 faces from the outer wall of the insulator 7 to the outer periphery. Side protrusion. That is, the restricting part 21 is connected to the root part 22 , and the root part 22 is connected to the outer wall surface of the insulator 7 . The protrusion 9 has a sufficient thickness in the axial direction of the insulator 7 and is provided with a fixing plane 13 . That is, the protruding portion 9 has a sufficient thickness in the direction of the central axis 20 .

Different from the shape described in the first embodiment, in this embodiment, the fixing plane 13 on the protruding portion 9 includes a curved surface 31 that curves toward the core 2 in the peripheral direction. That is, the fixed plane 13 includes a curved surface 31 that bends toward the core 2 along the radial direction of the insulator 7 and in a direction away from the outer wall surface of the insulator 7 . That is to say, the part of the fixing plane 13 close to the outer diameter 11 of the insulator is a plane parallel to the back surface 30 of the circuit board 4 , as shown in FIG. 8 , while the part far away from the outer diameter 11 of the insulator is bent downward toward the core 2 . That is, the fixed plane 13 includes a flat part and a curved part. The flat part is parallel to the back surface 30 of the circuit board 4 , or perpendicular to the central axis 20 , while the curved part is bent toward the core 2 along the radial direction of the insulator 7 and away from the outer wall surface of the insulator 7 .

The restricting portion 21 protrudes from the outer peripheral end of the root portion 22 to both sides of the annular shape of the iron core 2 in the tangential direction. That is, the restricting portion 21 protrudes from both sides of the root portion 22 along the tangent line of the outer wall surface of the iron core 2 , and the tangent line of the outer wall surface of the iron core 2 is perpendicular to the central axis 20 . Since the restricting portion 21 protrudes from the root portion 22 , the restricting portion 21 and the root portion 22 form a contracted portion on the protruding portion 9 , that is, the root portion 22 becomes a contracted portion of the protruding portion 9 .

The protruding portions 10 a are provided on both ends of the protruding portion 9 in the circumferential direction on the insulator outer diameter side end surface 12 of the insulator 7 and protrude in the axial direction. That is, one end of the insulator 7 close to its outer wall surface forms two side walls along the central axis 20. The two side walls are respectively located on both sides of the circumferential direction of the protruding portion 9. The top ends of the side walls each form an insulator outer diameter end surface 12, and the protruding portion 10a is formed from each side. An outer diameter end surface 12 of the insulator protrudes along the central axis 20 .

In addition, a protrusion 10b is provided on the insulator inner diameter end surface 14 of the insulator 7 at the same distance from both ends of the protrusion 9 in the circumferential direction, and the protrusion 10b protrudes in the axial direction. The so-called far distance means that with the protrusion 9 as the center, the distance between the two protrusions 10b is greater than the distance between the two protrusions 10a.

That is, one end of the insulator 7 close to its inner wall surface forms the insulator inner diameter end surface 14 along the central axis 20. Two protrusions 10b protrude from the insulator inner diameter end surface 14 along the central axis 20. The two protrusions 10b are respectively located at the protrusion 9. On both sides of the circumferential direction, the circumferential distance between the two protrusions 10b is greater than the circumferential distance between the two protrusions 10a.

When the circuit board 4 is assembled to the insulator 7 , the protrusions 10 a and 10 b restrict the movement of the circuit board 4 in the radial direction and the circumferential direction of the circuit board 4 . In the present embodiment, the protruding portion 10 a is provided on the outer diameter side end surface 12 of the insulator at a position wider than the root portion 22 in the circumferential direction of the protruding portion 9 . That is, the two protrusions 10 a are respectively located on both sides of the protrusion 9 in the circumferential direction, or in other words, the circumferential distance between the two protrusions 10 a is greater than the circumferential length of the root portion 22 . In addition, the protruding portion 10b is provided on the inner diameter side end surface 14 of the insulating portion at a position that is rotated by 45° to both sides in the circumferential direction with the root portion 22 as the center. That is, the circumferential positions of the two protrusions 10b and the circumferential positions of the root portion 22 are both different by 45°.

The installation of the circuit board 4 on the insulator 7 will be described in detail below with reference to FIGS. 7 and 8 . FIG. 7 is a partial plan view of the stator, and FIG. 8 is an A-A cross-sectional view of the stator 1b shown in FIG. 7 .

In order to fix the circuit board 4 on the insulator 7, the circuit board 4 is provided with notches that are recessed from the inner diameter and the outer diameter of the partial annular shape toward the inside of the circuit board 4, including notches 15a and notches 15b respectively. That is, the notch 15a is opened on the side of the circuit board 4 with a larger radius, and the notch 15b is opened on the side of the circuit board 4 with a smaller radius. The positions and sizes of the notches 15 a and 15 b correspond to the protrusions 10 a and 10 b provided on the insulator 7 . That is to say, when assembling the circuit board 4, the notches 15a and 15b on the circuit board 4 are engaged with the protrusions 10a and 10b on the insulator 7 respectively, thereby determining the diameter of the circuit board 4 in the diameter direction and the circumferential direction. Location. Furthermore, the position of the circuit board 4 in the axial direction is determined by bringing the circuit board 4 into contact with the insulator outer diameter side end surface 12 and the insulator inner diameter side end surface 14 . When the circuit board 4 is installed, the protruding portion 9 is smaller than the circuit board 4 The outer periphery of the core 2 protrudes toward the outer periphery, but is located further toward the inner periphery than the core 2 . That is, the protruding portion 9 protrudes toward the outer circumferential side than the side with a larger radius of the circuit board 4 , and the outer wall surface of the iron core 2 is located on the outer circumferential side of the protruding portion 9 .

The circuit board 4 is connected to the leads 6 on its rear side 30 facing the insulator 7 and the iron core 2 . The fixing plane 13 on the protrusion 9 is axially deviated from the outer diameter side end surface 12 of the insulator, that is, the back surface 30 of the circuit board 4 , by the same distance as the thickness of the lead 6 toward the core 2 side, that is, along the central axis 20 direction, the axial distance between the fixing plane 13 and the outer radial end surface 12 of the insulator and the back surface 30 of the circuit board 4 is equal to the thickness of the lead 6 , and the thickness refers to the length along the central axis 20 . Therefore, the fastening plane 13 of the projection 9 is located below the back side 30 on the circuit board 4 .

Therefore, when the lead wire 6 is fixed on the fixing plane 13, the lead wire 6 is located between the fixing plane 13 and the back surface 30 of the circuit board 4 in the axial direction. The lead wire 6 is clamped and fixed by the two protrusions 10a in the circumferential direction. Therefore, compared with the first embodiment, in this embodiment, the lead 6 is not fixed on the surface 19. Therefore, the entire height of the stator 1b is equal to the surface 19, that is, the entire height of the stator 1b is up to the surface 19. This reduces the overall height of the motor.

In the above structure of this embodiment, the lead 6 across the fixing plane 13 and the root 22 are fastened to the shrinkage portion on the inner circumferential side of the restricting portion 21 of the protruding portion 9 by using restraints such as ropes or ties. Together, the lead wire 6 is fixed on the insulator 7 .

The above structure of this embodiment has the same effect as that of the first embodiment.

In addition, since the lead wire 6 is between the circuit board 4 and the insulator 7, the overall height of the motor can be suppressed and the motor can be miniaturized.

Since the part of the fixing plane 13 close to the outer diameter 11 of the insulator is the plane of the fixed lead 6, and the part far away from the outer diameter 11 of the insulator is bent downward toward the side of the core 2, even if the background technology shown in Figure 9 As shown in the figure, the outer frame of the motor is covered from both sides in the axial direction, which can also reduce the bending load caused by the lead 6 being pressed in the height direction of the stator.

With the above structure, even if the lead wire 6 is subjected to external force such as pulling or vibration caused by motor operation, even if the external force is transmitted to the circuit board 4 through the insulator 7, the distance between the protruding portions 10b on the inner circumferential side is longer than that of the protruding portions 10a on the outer circumferential side. The distance between them is large, so the circuit board 4 can be made more stable, thereby protecting the electrical connection parts on the circuit board 4 .

The stators 1a and 1b of the above structure can be used in a motor, and the motor can be suitable for air supply equipment.

So far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the stator, motor and air supply device of the present disclosure. The leads of the present disclosure can be easily secured and resist externally applied forces.

It should be noted that implementation methods not shown or described in the drawings or the text of the specification are all forms known to those of ordinary skill in the technical field and have not been described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments, which can be simply modified or replaced by those of ordinary skill in the art.

It should be noted that throughout the drawings, the same elements are designated by the same or similar reference numerals. In the above description, some specific embodiments are only for descriptive purposes and should not be construed as any limitations on the disclosure, but are merely examples of embodiments of the disclosure. Conventional structures or constructions will be omitted where they may obscure the understanding of the present disclosure. It should be noted that the shapes and sizes of the components in the figures do not reflect the actual sizes and proportions, but only illustrate the contents of the embodiments of the present disclosure.

The above-mentioned specific embodiments further describe the purpose, technical solutions and beneficial effects of the present disclosure in detail. It should be understood that the above-mentioned are only specific embodiments of the present disclosure. It is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

1: stator

2:Iron core

3: Winding

4: Circuit board

5:Terminal pins

6:Lead

7: Insulator

8:Yoke part

9:Protrusion

Claims (10)

A stator, including: an iron core in an annular shape; a winding wire wound around the iron core; an insulator to insulate the iron core and the winding wire; a circuit board; and terminal pins connected to the winding wire. a wire and the circuit board; a lead wire drawn out from the circuit board and connected to the circuit board, wherein the insulator is provided with a protrusion protruding toward the outer peripheral side of the annular shape for fixing the lead wire, In addition, the protruding portion protrudes toward the outer periphery of the circuit board. The stator according to claim 1, wherein the circuit board includes: a back surface facing the iron core; and a surface facing away from the iron core; the leads are connected to the back surface and located in the circuit between the back side of the board and a fixed plane on the circuit board side of the protrusion. The stator according to claim 2, wherein the protruding portion includes: the fixing plane closer to the iron core than the back surface, and the lead wire is fixed on the fixing plane. The stator according to claim 3, wherein the fixed plane includes: A curved surface that curves toward the outer circumferential direction and toward the iron core. The stator according to claim 1, wherein the circuit board includes: a back surface facing the iron core; and a surface facing away from the iron core; the leads are connected to the surface, and the protruding portion is provided with A fixing plane that is on the same plane as the surface of the circuit board to which the leads are connected, and the leads are fixed on the fixing plane. The stator according to claim 1, wherein the protruding portion includes a root portion protruding from the outer peripheral side of the insulator, and a restricting portion protruding from the outer peripheral side of the root portion in a tangential direction of the annular shape, and The lead wire is fixed to the constricted portion of the restriction portion on the inner circumferential side of the root portion. The stator according to claim 6, wherein a tangential width of the root portion is smaller than a diameter of the lead wire. The stator according to claim 5, wherein the insulator further includes a protrusion provided on the inner peripheral side of the protrusion for limiting the position of the circuit board. A motor provided with the stator described in any one of claims 1 to 8. An air blowing device, which is provided with the motor described in claim 9.