JP2010183660A - Stator, brushless motor, method of manufacturing the stator, and method of manufacturing the brushless motor - Google Patents

Abstract

In an integrated stator core used for an inner rotor type brushless motor, there is provided means capable of fixing a terminal of a continuously wound coil by entanglement and realizing reduction in size of the motor. .
A stator 12 includes a stator core 20 having a plurality of teeth 31 to 36 arranged in a circumferential direction with respect to an axis 101 and protruding toward the axis 101, and an insulator 21 for insulatingly covering the teeth 31 to 36, 22, a coil 23 wound around each of the teeth 31 to 36 with the insulators 21 and 22 interposed therebetween, and a tangle that protrudes in the direction of the axis 101 with respect to the stator core 20 and a part of the coil 23 is entangled. Pins 24 to 26 and terminal pins 28 to 30 that are connected to the binding pins 24 to 26 and project in the direction of the axis 101.
[Selection] Figure 3

Description

  The present invention relates to a stator used in an inner rotor type brushless motor, and more particularly, to a stator that can easily tie a connecting wire of a coil to a binding pin protruding from a stator core.

  Conventionally, as a brushless motor in which a rotor is rotated by a rotating magnetic field formed by a stator, an inner rotor type or an outer rotor type is known. In the structure of the inner rotor type stator, a rotor having a multipolar magnet is disposed inside a cylindrical stator in which a plurality of teeth protrudes inward.

  As a method of forming a coil by winding on the teeth of the stator, a method of winding each tooth individually or a method of winding a plurality of teeth continuously without cutting the winding is known. ing. The latter winding method is also called concentrated winding. In such various winding methods, a winding device is used to automate the winding work (see, for example, Patent Documents 1 and 2). In a winding using a winding device, the end of the winding is entangled and fixed to a terminal pin or the like (for example, see Patent Document 3).

  In a stator used for an inner rotor type brushless motor, a stator including a divided core obtained by dividing a stator core for each tooth is known in order to increase the winding efficiency of each coil (see, for example, Patent Document 4). By dividing the stator core, a sufficient space can be secured around the teeth of each divided core, so that winding is facilitated and the winding efficiency of the coil is improved. However, dividing the stator core increases the number of work steps when manufacturing the stator and the motor, resulting in an inevitable cost increase. On the other hand, an integrated stator core in which a plurality of teeth protrudes in the axial direction has an advantage that the cost is lower than that of a split core.

JP 2008-61366 A JP 2007-6777 A JP 2008-11650 A JP 2002-058181 A

  However, if the stator core is of an integral type, the size of the nozzle is limited when the coil is wound using the winding device. For example, a nozzle of a nozzle type winding device has a tube formed in an L shape or a saddle shape, and a copper wire is inserted into the nozzle. When this nozzle is operated so as to circulate around the teeth, a copper wire led out from the nozzle is wound around the teeth to form a coil. In an integrated stator core used for an inner rotor type brushless motor, the nozzle must be dimensioned so that it can be inserted into the internal space of the stator core.

  On the other hand, since the terminal pin is often arranged outside the stator core, when winding the copper wire around the terminal pin in the winding operation, the nozzle of the winding device is arranged outside the stator core. Then, when the nozzle is operated so as to go around the terminal pin, the copper wire is entangled with the terminal pin. When a plurality of terminal pins are arranged in parallel in the stator core as in a stator used in a three-phase brushless motor, the interval between the terminal pins is often narrower than the diameter (inner diameter) of the internal space of the stator core. Therefore, the tip portion of the L-shaped nozzle is arranged so as to be parallel to the terminal pin, and the copper wire is entangled around the terminal pin when the nozzle circulates around the terminal pin. In such an operation, in order for the copper wire to be entangled near the base of the terminal pin, the length of the terminal pin is preferably shorter than the dimension from the tip of the L-shaped nozzle to the bent portion.

  However, there is a limit to shortening the terminal pin in order to ensure sufficient electrical contact with the connector connected to the brushless motor. On the other hand, in order to tie a copper wire near the base of a terminal pin of a certain length, it is necessary to increase the dimension from the tip of the L-shaped nozzle to the bent portion, but then the nozzle can be inserted Since the inner diameter of the stator core becomes large, it becomes difficult to manufacture a small motor.

  The present invention has been made in view of such circumstances, and in an integrated stator core used in an inner rotor type brushless motor, the end of the coil can be fixed by entanglement, and the motor can be compact. An object is to provide a means that can be realized.

  (1) A stator according to the present invention includes a stator core having a plurality of teeth arranged in a circumferential direction with respect to an axis and protruding toward the axis, an insulator for insulatingly covering the teeth, and the insulator interposed therebetween. A coil wound around each of the teeth, a tangling pin protruding in the axial direction with respect to the stator core, and a terminal of the coil being entangled, and being connected to the tangling pin in the axial direction. And a protruding connector terminal.

  When winding is performed on the teeth of the stator using the winding device, the nozzle of the winding device is inserted into the stator core and circulates around the teeth. Before or after the winding to the teeth, the end of the coil is wound on the binding pin. In the binding to the binding pin, the nozzle is arranged outside the stator core and is rotated around the binding pin. Since the binding pin is configured independently from the connector terminal, the length of the binding pin can be connected to the end of the coil near the root of the binding pin by a nozzle that can be inserted into the stator core. Set to length.

  The connector terminal is connected to the binding pin. The connector terminal is connected to an external power source, and the binding pin and the connector terminal are connected to each other by caulking or welding, for example. When the end of the coil is entangled with the binding pin, the connector terminal does not need to be connected, so the length of the connector terminal is set to a length sufficient for electrical connection.

  (2) The binding pin may protrude from the stator core in which a plurality of the binding pins are arranged in parallel.

  For example, when the stator is used for a three-phase motor or the like, terminal pins that are respectively connected to a plurality of binding pins can serve as electrical contacts for the U phase, the V phase, and the W phase. Even if a plurality of binding pins are arranged in parallel, as described above, the nozzle of the winding device is wound around each binding pin, so that the end of the coil is wound around each binding pin. .

  (3) The height H of the binding pin protruding from the stator core in the axial direction is preferably smaller than the inner diameter R of the stator core at the tip toward the axis of each tooth.

  (4) The present invention may be regarded as a brushless motor including the stator and a rotor disposed inside the stator and rotated by a rotating magnetic field formed by the stator.

  (5) In the stator manufacturing method according to the present invention, the nozzle of the winding device circulates around the binding pin protruding in the axial direction with respect to the stator core, and is arranged in the circumferential direction with respect to the axis of the stator core. The ends of the coils wound around the teeth protruding toward the axis are fixed and entangled with each other, and the nozzles enter the inner space of the stator core and circulate around the teeth. A first step of winding and forming a coil; and a second step of connecting the connector terminal protruding in the axial direction to the binding pin.

  In the first step, the teeth are wound by a nozzle that can enter the internal space of the stator core to form a coil. In addition, the size of the binding pin is adopted in which the nozzle is circulated around the binding pin and the terminal of the coil can be wound. Then, after the terminal of the coil is entangled with the binding pin in the first step, the connector terminal is connected to the binding pin in the second step, so that the connector terminal takes into consideration the ease of binding of the terminal of the coil. Therefore, dimensions suitable for electrical connection with an external power source are adopted.

  (6) A tubular body bent in an L shape may be used as the nozzle of the winding device.

  (7) The present invention may be understood as a method of manufacturing a brushless motor in which a rotor rotated by a rotating magnetic field formed by the stator is assembled in the internal space of the stator.

  According to the present invention, in the integrated stator core, since the connector terminal is connected to the binding pin protruding in the axial direction, the nozzle having a size capable of entering the internal space of the stator core is used to wind the teeth. Is performed to form a coil, and the nozzle is used to easily entangle the end of the coil to the binding pin. Thereby, the small stator which can use a coil | winding apparatus is manufactured at low cost.

FIG. 1 is a front view showing an external configuration of a brushless motor 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a cross section along the axis 101 of the brushless motor 10. FIG. 3 is a perspective view showing an external configuration of the stator 12. FIG. 4 is a plan view showing an external configuration of the stator 12. FIG. 5 is a plan view showing an external configuration of the stator core 20. FIG. 6 is an exploded perspective view of the stator 12 in which the binding pins 24 to 26 and the terminal pins 28 to 30 are disassembled. FIG. 7 is a cross-sectional view showing a method for manufacturing the stator 12. FIG. 8 is a cross-sectional view showing a method for manufacturing the stator 12.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, this Embodiment is only one aspect | mode of the stator or brushless motor which concerns on this invention, and it cannot be overemphasized that an embodiment can be changed in the range which does not change the summary of this invention.

[Schematic configuration of brushless motor 10]
As shown in FIGS. 1 and 2, the brushless motor 10 mainly includes a rotor 11 and a stator 12. The rotor 11 is disposed inside the stator 12 with a gap therebetween. The rotor 11 is configured such that magnets having a predetermined number of poles are arranged on the outer periphery of a shaft so that N poles and S poles are alternately arranged in the circumferential direction, and the axis 101 is centered by a rotating magnetic field formed by the stator 12. Rotate as The brushless motor 10 is a three-phase motor that generates a rotating magnetic field by the U phase, the V phase, and the W phase. However, the brushless motor and the stator according to the present invention are not limited to the three-phase motor.

[Stator 12]
The stator 12 includes a stator core 20, insulators 21 and 22, a coil 23, binding pins 24 to 27, and terminal pins 28 to 30 as main components.

[Stator core 20]
As shown in FIG. 5, the stator core 20 has six teeth 31 to 36 that are arranged in the circumferential direction with respect to the axis 101 and project toward the axis 101. The stator core 20 has a substantially cylindrical shape. A cylindrical outer wall of the stator core 20 is constituted by a yoke 37. Each of the teeth 31 to 36 protrudes from the yoke 37 toward the axis 101. Each of the teeth 31 to 36 has the same shape except for the disposition, and is formed in a T shape in plan view.

  As shown in FIG. 5, six teeth 31 to 36 and an annular yoke 37 are punched from one electromagnetic steel plate and formed integrally as one core piece. As shown in FIG. Shaped core pieces are laminated in the direction of the axis 101 to form one stator core 20. Thus, the stator core 20 in which the teeth 31 to 36 are integrally formed by punching from one electromagnetic steel sheet is referred to as an “integrated stator core” in the present specification. This "integrated stator core" is a "divided stator core" formed by combining the divided cores divided for each of the teeth 31 to 36 or for each of a plurality of tooth groups of each of the teeth 31 to 36 into a cylindrical shape. It is a concept for.

[Insulators 21, 22]
As shown in FIGS. 1 to 3, the teeth 31 to 36 of the stator core 20 are insulated and covered with insulators 21 and 22. The insulators 21 and 22 insulate and coat both end surfaces of the stator core 20 in the direction of the axis 101 and also insulate the surfaces of the teeth 31 to 36 around which the coil 23 is wound. As shown in each drawing, in each of the teeth 31 to 36, the coil 23 is wound around the radial direction extending radially from the axis 101, so that each tooth 31 to 36 has a surface extending radially from the axis 101, and The both end surfaces in the direction of the axis 101 are covered with insulation by insulators 21 and 22. The insulators 21 and 22 are formed from, for example, an insulating synthetic resin. A coil 23 is wound around each of the teeth 31 to 36 with the insulators 21 and 22 interposed therebetween.

  As shown in FIGS. 1 to 3, the insulators 21 and 22 have substantially the same shape as both end surfaces of the stator core 20 in the direction of the axis 101 when viewed from the direction of the axis 101. As shown in FIG. 2, the insulators 21 and 22 have coil wound portions 43 and 44 that cover the teeth 31 to 36 and support the coils 23 so as not to collapse. The coil winding portions 43 and 44 are formed as concave grooves at both ends in the direction of the axis 101, and the coil 23 is wound in each concave groove.

  As shown in FIGS. 1 and 3, the insulator 21 has side walls 45 to 50 that protrude in the direction of the axis 101 along the outer peripheral wall of the stator core 20 from the coil wound portion 43. The side walls 45 to 50 have a thickness corresponding to the yoke 37 of the stator core 20. The adjacent side walls of the side walls 45 to 50 are separated from each other in the circumferential direction of the stator core 20. The distance between the side walls 45 to 50 is not particularly limited, but the side walls 45 to 50 are separated from each other to such an extent that the copper wires wound around the teeth 31 to 36 can be sufficiently inserted to form the coil 23. ing. Moreover, although arrangement | positioning of each side wall 45-50 is not specifically limited, In general, each side wall 45-50 is arrange | positioned corresponding to each teeth 31-36. Each of the side walls 45 to 50 is formed with a hole 51 that is recessed from the end surface in the direction of the axis 101. The binding pins 24-27 are selectively inserted into the holes 51 of the side walls 45-50.

[Tangled pins 24-27]
As shown in FIGS. 3 and 4, the four binding pins 24 to 27 are arranged in parallel to the circumferential direction of the axis 101 corresponding to the side walls 45, 46, 47, and 49. The binding pins 24 to 27 are fixed to the side walls 45, 46, 47, and 49 by being fitted into the holes 51 formed in the side walls 45, 46, 47, and 49, respectively, toward the axis 101. It is protruding. Of the four binding pins 24 to 27, the binding pins 24 to 26 are fixed with the ends of the coils 23 constituting the U phase, the V phase, and the W phase, respectively. The bald pin 27 is fixed by tying the terminals of all the coils 23 of the U phase, V phase, and W phase as neutral points. The binding pins 24 to 26 have the same shape except that the side walls 45, 46 and 47 to be fixed are different.

  As shown in FIG. 6, each of the binding pins 24 to 26 has a substantially flat plate shape formed of a conductive member, and a substantially central portion in the direction of the axis 101 is formed wide in the circumferential direction. . In other words, each side wall 45-47 side is formed narrower than the central part, and this narrow part is the binding part 52-54 with which the terminal of the coil 23 is bound. In addition, bent portions 55 to 57 that are bent in a U-shape are formed in the wide central portion. The ends of the coils 23 entangled with the binding portions 52 to 54 are fixed to the bent portions 55 to 57 by caulking. Each upper end portion of each binding pin 24 to 26 is formed narrower than the central portion, and this upper end portion is a connecting portion 58 to 60 connected to each terminal pin 28 to 30.

  As shown in FIG. 6, the binding pin 27 has a substantially flat plate shape formed of a conductive member, and a substantially central portion in the direction of the axis 101 is formed wide in the circumferential direction. In other words, the side wall 49 side is formed narrower than the central portion, and this narrow portion is the binding portion 61 where the end of the coil 23 is bound. In addition, a pair of bent portions 62 and 63 bent in a U shape are formed in the wide central portion. The ends of the coil 23 entangled with the binding portion 61 are fixed to the bent portions 62 and 63 by caulking. Note that none of the terminal pins 28 to 30 is connected to the binding pin 27.

  As shown in FIG. 4, in the binding pins 24 to 26 described above, the intervals L between the adjacent binding pins 24 to 26 are constant. This interval L is smaller than the inner diameter R of the stator core 20 at the tip of each of the teeth 31 to 36 toward the axis 101 in the stator 12 (interval L <inner diameter R).

  Further, as shown in FIG. 2, the heights H of the binding pins 24 to 26 described above protruding from the side walls 45 to 47 of the insulator 21 in the direction of the axis 101 are constant, and the height H is , Smaller than the aforementioned inner diameter R (height H <inner diameter R).

[Terminal pins 28-30]
As shown in FIG. 6, the terminal pins 28 to 30 are arranged corresponding to the binding pins 24 to 26. These terminal pins 28 to 30 are respectively connected to the corresponding binding pins 24 to 26 and protrude in the direction of the axis 101. Each of the terminal pins 28 to 30 has a substantially flat plate shape formed from a conductive member. In each terminal pin 28-30, the edge part by the side of the binding pin 24-26 is formed narrowly, and this narrow part is connected to the corresponding binding pin 24-26. 66. Bent portions 67 to 69 bent in a U-shape are formed immediately above the connecting portions 64 to 66, respectively. By these bent portions 67 to 69, the connecting portions 58 to 60 of the binding pins 24 to 26 are crimped and fixed. Each length M (see FIG. 2) of each terminal pin 28-30 along the direction of the axis 101 is constant, and this length M is sufficiently larger than the aforementioned inner diameter R. The length M is set to a length sufficient to electrically connect sockets for applying the U-phase, V-phase, and W-phase voltages to the terminal pins 28 to 30. Each of the terminal pins 28 to 30 corresponds to a connector terminal in the present invention.

[Method for Manufacturing Brushless Motor 10]
Below, the manufacturing method of the brushless motor 10 is demonstrated. The feature of this manufacturing method is that it includes the following two steps.
(1) The nozzle 80 of the winding device is circulated around each binding pin 24 to 26, and the terminal of the coil 23 wound around each of the teeth 31 to 36 is connected and fixed. Further, the nozzle 80 is fixed to the stator core. A first step of entering the inner space of 20, winding around each of the teeth 31 to 36, and winding around each of the teeth 31 to 36 to form the coil 23.
(2) The 2nd process of joining each terminal pin 28-30 to each binding pin 24-26.

  As described above, the six teeth 31 to 36 and the annular yoke 37 are punched from one electromagnetic steel sheet and integrally formed as one core piece, and a plurality of core pieces are laminated in the direction of the axis 101. One stator core 20 is formed. The insulators 21 and 22 are bonded and fixed to the stator core 20 so as to insulate the end surfaces of the stator core 20 in the direction of the axis 101 and the surfaces of the teeth 31 to 36 around which the coil 23 is wound. Further, in the insulator 21, the binding pins 24 to 27 are fitted into the holes 51 formed in the side walls 45, 46, 47, and 49, respectively, and the binding pins 24 to 27 are connected to the side walls 45, 27. It is fixed to 46, 47, 49. Thus, the coil 23 is wound around the stator core 20 to which the insulators 21 and 22 and the binding pins 24 to 27 are assembled.

[First step]
For the winding of the coil 23, a nozzle type winding device is used, and the two teeth selected so as to constitute the U phase, V phase, and W phase among the six teeth 31 to 36, respectively. Copper wire 81 is concentratedly wound. Since the winding method in each of the U phase, the V phase, and the W phase is the same, the winding method of the coil 23 will be described using the U phase as an example.

  Since the nozzle type winding device is well known, detailed description is omitted here, but as shown in FIG. 7, the nozzle 80 is a tube through which the copper wire 81 can be inserted, In the winding operation, the tip side in the direction 102 in which the copper wire 81 travels is bent at a substantially right angle to form an L shape. The dimension N of the portion from the L-shaped bent portion to the tip (hereinafter also simply referred to as “tip portion”) is smaller than the inner diameter R of the stator core 20 described above (dimension N <inner diameter R), and It is larger than the height H of the binding pins 24-26 (dimension N> height H). Further, the outer diameter of the nozzle 80 is sufficiently smaller than the interval L between the binding pins 24 to 26.

  When winding is performed on the two teeth 31 and 34 constituting the U phase, as shown in FIG. 7, first, the nozzle 80 of the winding device is extended from the tip portion thereof. The nozzle 80 circulates around the binding pin 24 fixed to the side wall 45 corresponding to the tooth 31 with the direction 103 substantially coincident with the direction of the axis 101 (arrow 104). As described above, since the dimension N of the tip portion of the nozzle 80 is larger than the height H of the binding pin 24, the tip of the nozzle 80 is arranged corresponding to the binding portion 52 of the binding pin 24, The nozzle 80 can be made to circulate around the binding portion 52. Thereby, the copper wire 81 is entangled and fixed to the binding part 52.

  Subsequently, as shown in FIG. 8, the nozzle 80 moves into the internal space of the stator core 20 by making the extending direction 103 of the tip of the nozzle 80 orthogonal to the axis 101, that is, matching the inner diameter direction of the stator core 20. Inserted. As described above, since the dimension N of the tip of the nozzle 80 is smaller than the inner diameter R of the stator core 20, the nozzle 80 can enter the internal space of the stator core 20. And the front-end | tip of the nozzle 80 is advanced into the slot part around the teeth 31, and the nozzle 80 circulates around the teeth 31 (arrow 105). As a result, the coil 23 is wound around the teeth 31.

  When the coil 23 is wound around the tooth 31, as shown in FIG. 6, the crossover wire 38 of the coil 23 that is concentratedly wound is placed along the outer periphery of each of the side walls 45 to 50, and the next tooth 34. As shown in FIG. 8, the nozzle 80 is rotated around the teeth 34, and the coil 23 is wound around the teeth 34. Then, as shown in FIG. 7, the end of the coil 23 is entangled and fixed to the tying pin 27. Thereby, the winding of the coil 23 constituting the U phase is completed. After the end of winding, the copper wire 81 communicated with the nozzle 80 is cut. And each terminal of the two coils 23 which comprise a U-phase is each crimp-fixed to the bending part 55 of the binding pin 24, or the bending parts 62 and 63 of the binding pin 27, respectively. As a result, the two coils 23 that are concentratedly wound around the teeth 31 and 34 and constitute the U-phase are electrically connected to the binding pins 24 and 27.

  In addition, the winding method of the two coils 23 that are concentratedly wound around the teeth 32 and 35 to constitute the V phase, and the winding method of the two coils 23 that are concentratedly wound around the teeth 33 and 36 and constitute the W phase. Since this is the same as the above-described concentrated winding in the U phase, a detailed description thereof will be omitted. However, the two coils 23 that are concentratedly wound around the teeth 32 and 35 and constitute the V phase are connected to the pin 25 , 27 and the two coils 23 that are concentratedly wound around the teeth 33, 36 and constitute the W phase are electrically connected to the binding pins 26, 27.

  After the coils 23 constituting the U phase, the V phase, and the W phase are concentratedly wound, as shown in FIG. 3, the terminal pins 28 to 30 are connected to the binding pins 24 to 26, respectively. Each connection with each binding pin 24-26 and each terminal pin 28-30 is performed similarly. For example, the connecting portion 64 of the terminal pin 28 is brought into contact with the connecting portion 58 of the binding pin 24, and the connecting portion 58 and the connecting portion 64 are caulked and fixed by the bent portion 67, and the connecting portion 58 and the connecting portion 64 are further fixed. The contact part is fixed by welding. As a result, the terminal pin 28 is electrically connected to the binding pin 24. Similarly, the terminal pin 29 is electrically connected to the binding pin 25, and the terminal pin 30 is electrically connected to the binding pin 26. The brushless motor 10 is manufactured by assembling the rotor 11 in the internal space of the stator 12 thus manufactured.

[Operational effects of this embodiment]
As described above, in the integrated stator core 20, the terminal pins 28 to 30 are connected to the binding pins 24 to 26 protruding in the direction of the axis 101, so that it can enter the internal space of the stator core 20. A coil 80 is formed by winding the teeth 31 to 36 by using the nozzle 80 having the dimension N, and the end of the coil 23 is easily provided to the binding pins 24 to 26 by using the nozzle 80. Entangled in Thereby, the small stator 12 which can use a coil | winding apparatus is manufactured at low cost.

  Further, the binding pins 24 to 26 are arranged in parallel along the direction of the axis 101, and the nozzle 80 of the winding device is provided even if the interval L between the binding pins 24 to 26 is smaller than the inner diameter R of the stator core 20. Is wound around the binding pins 24 to 26, and the terminals of the coils 23 constituting the U phase, the V phase, and the W phase are respectively connected to the binding pins 24 to 26.

  Further, since the height H of each binding pin 24 to 26 is made smaller than the inner diameter R of the stator core 20, the nozzle 80 that can enter the internal space of the stator core 20 is connected to each other in the first step described above. It can be circulated around pins 24-26. On the other hand, in the second step, the length of each of the terminal pins 28 to 30 connected to each of the binding pins 24 to 26 may be a dimension suitable for electrical connection with a socket of an external power source.

  In the stator 12 according to the present embodiment, the coils 23 constituting each phase of the U phase, the V phase, and the W phase are concentratedly wound. However, in the present invention, the coils are not necessarily concentratedly wound. For example, even if the coil 23 is wound around each of the teeth 31 to 36 without the connecting wire 38 being provided, the same effect as described above is obtained.

DESCRIPTION OF SYMBOLS 10 ... Brushless motor 11 ... Rotor 12 ... Stator 20 ... Stator core 21,22 ... Insulator 23 ... Coil 24-27 ... Tying pin 28-30 ... Terminal pin (Connector terminal)
31-36 ... Teeth 80 ... Nozzle 81 ... Copper wire 101 ... Axis

Claims (7)

A stator core having a plurality of teeth arranged in a circumferential direction with respect to the axis and projecting toward the axis;
An insulator for insulatingly covering the teeth;
A coil wound around each of the teeth with the insulator interposed therebetween;
A binding pin that protrudes in the axial direction with respect to the stator core, and the end of the coil is wound around,
A stator terminal connected to the binding pin and projecting in the axial direction.   The stator according to claim 1, wherein the binding pins are respectively protruded from the stator core in which a plurality of the binding pins are arranged in parallel.   The stator according to claim 1 or 2, wherein a height H of the binding pin protruding from the stator core in the axial direction is smaller than an inner diameter R of the stator core at a tip toward the axial line of each tooth. The stator according to any one of claims 1 to 3,
A brushless motor comprising: a rotor disposed inside the stator and rotated by a rotating magnetic field formed by the stator. Winding the teeth of the winding device around the binding pins protruding in the axial direction with respect to the stator core, and winding them around the teeth arranged in the circumferential direction with respect to the axis of the stator core and protruding toward the axis A first step in which a coil end is wound and fixed, and the nozzle is made to enter the internal space of the stator core, circulate around the teeth and wound around the teeth to form a coil, and
And a second step of connecting the connector pin projecting in the axial direction to the binding pin.   The stator manufacturing method according to claim 5, wherein a tubular body bent in an L shape is used as the nozzle of the winding device.   A method for manufacturing a brushless motor, wherein a rotor rotated by a rotating magnetic field formed by the stator is assembled in an internal space of the stator manufactured by the method for manufacturing a stator according to claim 5 or 6.

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