JP2021083218A - Stator, motor and method for manufacturing stator - Google Patents

Abstract

To provide a stator, a motor, and a method for manufacturing the stator which can appropriately arrange a substrate mounted with a magnetic sensor at an end of an insulator.SOLUTION: In a stator 3, an insulator 5 is provided with a plurality of holes 59 opening toward one side in an axial direction L at positions separated from an axis L in a radial direction, respectively, and a substrate 7 mounted with a magnetic sensor 8 is provided with a plurality of through holes 71 overlapping with each of the plurality of holes 59 in the axial direction L. Consequently, some of the plurality of through holes 71 can be utilized as a first through hole 711 for aligning the substrate 7 to the insulator 5 by pins 10 fitted into the holes 59. In addition, the substrate 7 can be fixed to an appropriate position of the insulator 5 by fixing tightening members 9 into the holes 59 via some of the other through holes 71 (a second through hole 712) of some of the plurality of through holes 71.SELECTED DRAWING: Figure 7

Description

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

Patent Document 1 discloses a motor including a stator in which a coil is wound around a salient pole of a stator core via an insulator. This type of motor includes a substrate on which a plurality of magnetic sensors for detecting the rotation of the rotor are mounted. The board is provided with two through holes, and the board is fitted by fitting the convex portion of the insulator into one of the two through holes provided at a position radially separated from the central axis. The substrate is fixed to the insulator by positioning and screwing into the insulator hole through the other through hole provided on the central axis.

Japanese Unexamined Patent Publication No. 2012-67659

However, in the configuration described in Patent Document 1, in order to position the insulator by fitting one through hole provided at a position radially separated from the central axis into the convex portion, the insulator is positioned while rotating the substrate in the circumferential direction. It is necessary to align the position of the through hole provided on the central axis with the hole for screwing. Therefore, the magnetic sensor may come into contact with the insulator and the magnetic sensor may be damaged.

In view of the above problems, an object of the present invention is to provide a stator, a motor, and a method for manufacturing a stator capable of appropriately arranging a substrate on which a magnetic sensor is mounted at an end portion of an insulator.

In order to solve the above problems, the stator according to the present invention includes a body portion extending in the circumferential direction, a stator core having a plurality of salient poles protruding from the body portion to one side in the radial direction, and the body portion. An insulator that covers the stator core from the axial direction in which the central axis of the insulator extends, a coil wound around each of the plurality of salient poles via the insulator, and one end of the insulator in the axial direction. The insulator includes a fixed substrate and a magnetic sensor held on the other side of the substrate in the axial direction, and the insulator has a plurality of holes opened toward one side in the axial direction, each of which has a central axis. The substrate is provided at a position radially separated from the above, and each of the plurality of holes is provided with a plurality of through holes overlapping in the axial direction, and some of the plurality of through holes are provided. Is a first through hole for aligning the substrate with the insulator by overlapping with the hole, and some other through holes are the substrate and the insulator with a fastening member fixed to the hole from the through hole. It is characterized in that it is a second through hole for fixing and.

In the stator of the present invention, the insulator is provided with a plurality of holes that open toward one side in the axial direction at positions separated from the axis in the radial direction, and the substrate overlaps each of the plurality of holes in the axial direction. A plurality of through holes are provided, and some of the plurality of through holes are first through holes for aligning the substrate with the insulator by overlapping with the holes. Therefore, since the substrate can be easily and surely aligned with the insulator, it is unlikely that the magnetic sensor will be strongly contacted with the insulator and damaged when the substrate is aligned with the insulator. Further, if the fastening member is fixed to the hole through the other part of the through holes among the plurality of through holes, the substrate can be fixed at an appropriate position of the insulator.

In the method for manufacturing a stator according to the present invention, when the substrate is fixed to the insulator, a pin fitted in a hole overlapping the first through hole among the plurality of holes is passed through the first through hole. , The substrate is positioned with respect to the insulator. According to this aspect, the substrate can be positioned on the insulator with the substrate separated from the insulator in the axial direction. Therefore, when aligning the substrate with the insulator, it is unlikely that the magnetic sensor will come into strong contact with the insulator and be damaged.

In the present invention, it is possible to adopt an embodiment in which the plurality of through holes include a plurality of the second through holes.

In the present invention, the magnetic sensor has a lead portion extending from the substrate to the other side in the axial direction, and a sensor portion provided at the other end portion of the lead portion in the axial direction. A sensor accommodating portion for accommodating the sensor portion inside is provided at an angular position sandwiched between the salient poles adjacent to each other in the circumferential direction in the insulator, and the sensor accommodating portion is located on one side in the axial direction. It is possible to adopt a mode in which the opening is directed toward one side and the opening is directed toward one side in the radial direction. According to this aspect, since the sensor portion of the magnetic sensor can be brought close to the magnet of the rotor, the magnetic sensor can properly detect the rotation of the rotor.

In the present invention, the sensor accommodating portion includes a first inner wall portion capable of supporting the sensor portion from the circumferential direction, and a second inner wall portion capable of supporting the sensor portion from the other side in the radial direction. Aspects can be adopted. According to such an aspect, the sensor portion of the magnetic sensor can be arranged at a predetermined position in the sensor accommodating portion.

In the present invention, the insulator includes a plate portion protruding from one end in the axial direction toward one side in the axial direction, and the hole is formed in a tubular portion protruding in the radial direction from the plate portion. The provided embodiment can be adopted. According to such an aspect, the plate portion can be reinforced by the tubular portion. Therefore, even when the coil wire is routed along the plate portion, the plate portion is unlikely to be deformed or damaged.

In the present invention, the plate portion extends in the circumferential direction at a position separated from the first plate portion in the circumferential direction with the first plate portion extending in the circumferential direction, and the length in the circumferential direction is the first. A second plate portion shorter than the plate portion is provided, and the tubular portion can adopt a mode in which it protrudes in the radial direction from the second plate portion. According to this aspect, the second plate portion can be reinforced by the tubular portion. Therefore, when the coil wire is passed between the first plate portion and the second plate portion of the plate portions, even if a load is applied to the second plate portion having a short circumferential length, the second plate portion Deformation and damage are unlikely to occur.

In the present invention, the magnetic sensor can adopt an embodiment provided at at least three locations corresponding to the U phase, the V phase, and the W phase.

The stator according to the present invention is used to form a motor together with a rotor.

In the present invention, the insulator is provided with a plurality of holes that open toward one side in the axial direction at positions separated from each other in the radial direction, and the substrate is provided with a plurality of holes that overlap each of the plurality of holes in the axial direction. Through holes are provided, and some of the plurality of through holes are first through holes for aligning the substrate with the insulator by overlapping with the holes. Therefore, since the substrate can be easily and surely aligned with the insulator, it is unlikely that the magnetic sensor will be strongly contacted with the insulator and damaged when the substrate is aligned with the insulator. Further, if the fastening member is fixed to the hole through the other part of the through holes among the plurality of through holes, the substrate can be fixed at an appropriate position of the insulator. Further, among the plurality of holes, the substrate can be positioned with respect to the insulator by penetrating the pin fitted in the hole overlapping the first through hole through the first through hole. In this case, the substrate is aligned with the insulator. The substrate can be positioned on the insulator in a state of being separated in the direction. Therefore, when aligning the substrate with the insulator, it is unlikely that the magnetic sensor will come into strong contact with the insulator and be damaged.

A perspective view of a main part of one aspect of the motor according to the embodiment of the present invention as viewed from one side. An exploded perspective view of the stator shown in FIG. Explanatory drawing which shows the position of the magnetic sensor in the stator shown in FIG. Explanatory drawing of the stator core shown in FIG. FIG. 2 is a perspective view of the insulator shown in FIG. The explanatory view of the sensor accommodating part of the insulator shown in FIG. Explanatory drawing which shows the manufacturing method of the stator shown in FIG.

The motor 1 according to the embodiment of the present invention will be described with reference to the drawings. In the present specification, reference numeral L indicates a direction (axis direction) in which the central axis of the body portion 41 of the stator 3 extends. In the embodiment described below, one side L1 of the axis L direction is the side on which the substrate 7 is attached to the stator 3, and the other side L2 is the opposite side of the one side L1. Further, the direction orthogonal to the axis L is the radial direction, and the circumference of the axis L is the circumferential direction. Further, in the following description, an inner rotor type motor will be described. Therefore, "one side in the radial direction" in the present invention corresponds to "inside in the radial direction" in the embodiments described below.

(Overall configuration of motor 1)
FIG. 1 is a perspective view of a main part of one aspect of the motor 1 according to the embodiment of the present invention as viewed from one side L1. FIG. 2 is an exploded perspective view of the stator 3 shown in FIG. The motor 1 shown in FIGS. 1 and 2 is a three-phase brushless motor. The motor 1 has a rotor 2 and a stator 3 arranged on the outer side in the radial direction of the rotor 2. The rotor 2 includes a rotating shaft 21 and a magnet (not shown) provided on the outer peripheral surface of the rotating shaft 21. The motor 1 rotates the rotor 2 around the axis L by supplying power to the coil 6 included in the stator 3. An S pole and an N pole are provided on the outer peripheral surface of the magnet fixed to the rotor 2 in the circumferential direction. In this embodiment, a total of four poles, S poles and N poles, are alternately provided on the outer peripheral surface of the magnet. The motor 1 of this embodiment is used for a pump or the like with the stator 3 covered with a housing (not shown). The outer peripheral surface of the magnet may be provided with a total of two poles alternately having S poles and N poles.

(Stator 3)
FIG. 3 is an explanatory view showing the position and the like of the magnetic sensor 8 on the stator 3 shown in FIG. 2, and FIG. 3 shows a cross-sectional view (a) and a plan view (b) of AA'. In FIG. 3, in the plan view (b), the illustration of the substrate 7 is omitted. FIG. 4 is an explanatory view of the stator core 4 shown in FIG. Since the stator 3 has a structure symmetrical in the axis L direction, the description will be centered on one side L1 of the stator 3 in the axis L direction in which the substrate 7 is arranged.

As shown in FIGS. 2, 3 and 4, the stator 3 includes a body portion 41 extending in the circumferential direction and a stator core 4 having a plurality of salient poles 42 protruding inward in the radial direction from the inside of the body portion 41. It has an insulator 5 made of resin that covers the stator core 4 from the axis L direction, and a coil 6 wound around each salient pole 42 via the insulator 5. Further, the stator 3 includes a substrate 7 arranged so as to be overlapped with the end portion of L1 on one side of the insulator 5 in the axis L direction, and the substrate 7 is a magnetic sensor that detects magnetic poles formed on the outer peripheral surface of the magnet. 8 is implemented. In this embodiment, as shown in FIG. 3A, the center of the magnet 22 in the axis L direction substantially coincides with the center of the stator core 4 in the axis L direction, but the dimension of the magnet 22 in the axis L direction is , Shorter than the dimension of the stator core 4 in the axis L direction.

(Stator core 4)
The stator core 4 is a laminated core in which a plate-shaped base material is laminated in the L direction of the axis. The number of salient poles 42 is six, and six coils 6 are wound around the salient poles 42 of the stator core 4 via an insulator 5. In this embodiment, the coil 6 forms three coil groups of U phase, V phase, and W phase. As shown in FIG. 4, in the stator core 4, the salient pole 42 has an expansion portion 421 extending in the radial direction and facing the magnet in the circumferential direction, and a connecting portion 422 connecting the expansion portion 421 and the body portion 41. I have.

(Insulator 5)
FIG. 5 is a perspective view of the insulator 5 shown in FIG. FIG. 6 is an explanatory diagram of the sensor accommodating portion S of the insulator 5 shown in FIG. As shown in FIGS. 2, 3 and 5, the insulator 5 has a square tube portion 51 through which the salient pole 42 penetrates inside and an axial line L direction and a circumferential direction from the inner end portion in the radial direction of the square tube portion 51. It is provided with a tip insulating portion 52 projecting from the tip portion 52, and an outer flange portion 53 projecting from the radial outer end portion of the body portion 41 in the axial L direction and the circumferential direction. The tip insulating portion 52 and the outer flange portion 53 have an arc shape centered on the axis L when viewed from the axis L direction. The coil 6 shown in FIG. 2 is provided around the square tube portion 51 between the tip insulating portion 52 and the outer flange portion 53. The insulator 5 is composed of a first insulator member 5A and a second insulator member 5B divided into two in the axis L direction, and the first insulator member 5A and the second insulator member 5B from both sides in the axis L direction with respect to the stator core 4. After stacking the above, the first insulator member 5A and the second insulator member 5B are joined to form the insulator 5. The first insulator member 5A and the second insulator member 5B are resin molded bodies having the same structure, and the first insulator member 5A and the second insulator member 5B are used in opposite directions in the axis L direction.

The insulator 5 has a configuration in which the entire circumferential direction is connected, or a configuration in which the insulator 5 is divided in the circumferential direction. In this embodiment, the insulator 5 is divided into six in the circumferential direction. Therefore, as shown in FIG. 2, the six insulators 5 are arranged in an annular shape with the salient poles 42 inserted into the square tube portion 51, and the insulators 5 adjacent to each other in the circumferential direction come into contact with each other in the circumferential direction.

The tip insulating portion 52 has a first portion 526 that overlaps the expansion portion 421 of the stator core 4 from the outside in the radial direction, and a second portion 527 that overlaps the expansion portion 421 of the stator core 4 from both sides in the axis L direction. The second portion 527 is thicker in the radial direction than the first portion 526. In the present embodiment, at both ends of the second portion 527 in the circumferential direction, recesses recessed from the radial inner surface of the second portion 527 toward the radial outer side are recessed from the end of one side L1 in the axis L direction to the axis L. The recess extending in the direction constitutes a sensor accommodating portion S accommodating the sensor portion 81 of the magnetic sensor 8. More specifically, at both ends of the tip insulating portion 52 in the circumferential direction, a first inner wall portion 522 capable of supporting the sensor portion 81 of the magnetic sensor 8 from the circumferential direction by the inner wall of the recess, and a sensor of the magnetic sensor 8 A second inner wall portion 523 capable of supporting the outer side in the radial direction of the portion 81 is formed. Therefore, as shown in FIGS. 2, 3 and 6, when the insulator 5 is arranged in the circumferential direction, the first inner wall portion 522 and the second inner wall are located at the angular positions sandwiched between the salient poles 42 adjacent to each other in the circumferential direction. The sensor accommodating portion S accommodating the sensor portion 81 of the magnetic sensor 8 is partitioned by the portion 523.

The sensor accommodating portion S opens toward one side L1 of one side L1 in the axis L direction and opens inward in the radial direction. On the other side of the sensor accommodating portion S in the axis L direction, the bottom wall portion 521 of the sensor accommodating portion S is formed by the bottom portion of the recess. Therefore, the expansion portion 421 of the stator core 4 is not exposed at the bottom of the sensor housing portion S. However, in the insulator 5, the sensor accommodating portion S may be penetrated in the axis L direction. In this case, the expansion portion 421 of the stator core 4 is located at the bottom of the sensor accommodating portion S.

As shown in FIG. 5, the outer flange portion 53 includes a first core covering portion 54 superimposed on one side L1 of the body portion 41 of the stator core 4 on the radial outside of the square cylinder portion 51, and the other of the body portion 41. A second core covering portion 55 overlapped with the side L2 is provided. The first core covering portion 54 and the second core covering portion 55 each project in the axial direction L direction on the outer side of the inner peripheral side plate portion 56 protruding in the axial L direction and the inner peripheral side plate portion 56 in the radial direction. A plate portion 57 on the outer peripheral side and a bottom plate portion 58 extending in the radial direction and the circumferential direction along the body portion 41 of the stator core 4 are provided, and the bottom plate portion 58 is on the stator core 4 side of the plate portion 56 on the inner peripheral side. The end portion and the end portion of the plate portion 57 on the outer peripheral side on the stator core 4 side are connected. The plate portion 56 on the inner peripheral side, the plate portion 57 on the outer peripheral side, and the bottom plate portion 58 extend in an arc shape in the circumferential direction along the body portion 41, and have a routing groove 50 around which a coil wire (not shown) is routed. It is configured. As shown in FIG. 2, the circumferential dimension of the plate portion 56 on the inner peripheral side is longer than the length dimension of the coil 6 in the circumferential direction. Further, in the insulators 5 adjacent to each other in the circumferential direction, the plate portions 56 on the inner peripheral side are in contact with each other, and the plate portions 57 on the outer peripheral side are in contact with each other.

An opening portion 571 cut outward in the radial direction is provided at the center of the plate portion 57 on the outer peripheral side in the circumferential direction. The plate portion 56 on the inner peripheral side includes a first plate portion 561 and a second plate portion 562 separated from the first plate portion 561 in the circumferential direction, and the first plate portion 561 and the second plate portion 562 There is a drawer port 563 that opens in the radial direction between the spaces. Therefore, the coil wire wound between the tip insulating portion 52 and the first plate portion 561 can be pulled out radially outward from the outlet 563. Further, after the drawer port 563 is routed along the inner peripheral side plate portion 56 between the inner peripheral side plate portion 56 and the outer peripheral side plate portion 57 (wielding groove 50), the outer peripheral side plate portion 57 It can be pulled out radially outward from the opening portion 571.

(Board 7)
As shown in FIGS. 1 and 3, the substrate 7 has a ring shape when viewed from the axis L direction. The external dimensions of the substrate 7 are slightly larger than the external dimensions of the plate portion 57 on the outer peripheral side of the insulator 5. The center of the substrate 7 is opened in the axis L direction, and the end portion of one side L1 of the rotating shaft 21 of the rotor 2 projects from the opening. Such a substrate 7 is fixed to the insulator 5 in a state of being supported by a plate portion 56 on the inner peripheral side as an end portion of one side L1 in the axis L direction of the insulator 5. Here, the height of the plate portion 57 on the outer peripheral side in the axis L direction is lower than the height of the plate portion 56 on the inner peripheral side in the axis L direction. Therefore, the plate portion 57 on the outer peripheral side does not come into contact with the substrate 7.

As shown in FIGS. 2 and 3, the magnetic sensor 8 is mounted on the surface of the other side L2 of the substrate 7. In this embodiment, the magnetic sensor 8 generates a drive current to be supplied to the U-phase coil, the V-phase coil, and the W-phase coil by detecting the change in the magnetic field of the magnet 22 when the rotor 2 rotates. Hall element. Therefore, the magnetic sensors 8 are arranged at least at three locations corresponding to each of the U-phase coil, the V-phase coil, and the W-phase coil.

In this embodiment, the magnetic sensor 8 is a lead type provided with a lead portion 82 extending in the L direction of the axis. In such a magnetic sensor 8, the end portion of the lead portion 82 on one side L1 in the axis L direction is electrically connected to the substrate 7 by a solder 79, and the end portion of the lead portion 82 opposite to the substrate 7 (in the axis L direction). A sensor portion 81 provided with a magnetic sensor element is provided at the end of L2 on the other side). Therefore, the sensor portion 81 is located at a position separated from the substrate 7 on the other side L2 in the axis L direction. Therefore, if the sensor portion 81 of the magnetic sensor 8 is inserted inside the sensor accommodating portion S, the sensor portion 81 of the magnetic sensor 8 can be arranged at a position close to the magnet 22.

(Fixed structure of substrate 7 etc.)
As shown in FIGS. 2 and 3, the insulator 5 is provided with a plurality of holes 59 that open toward one side L1 in the axis L direction, respectively, at positions separated radially outward from the central axis (axis L). ing. In the present embodiment, the holes 59 are formed at six equidistant positions around the axis L at equidistant positions from the axis L.

Here, the hole 59 is provided in the tubular portion 564 protruding in the radial direction from the plate portion 56 on the inner peripheral side. More specifically, the tubular portion 564 is formed on the outer side of the inner peripheral side plate portion 56 in the radial direction in which the routing groove 50 is located. That is, the tubular portion 564 is formed from the bottom plate portion 58 along the inner peripheral side plate portion 56, and is connected to both the bottom plate portion 58 and the inner peripheral side plate portion 56. In the present embodiment, the tubular portion 564 is formed on the outer surface in the radial direction of the second plate portion 562, which has a shorter length in the circumferential direction, among the plate portions 56 on the inner peripheral side. Further, the tubular portion 564 is provided on the side of the outlet 563 from the central position in the circumferential direction.

On the other hand, the substrate 7 is provided with a plurality of through holes 71 overlapping in the axis L direction in each of the plurality of holes 59. Therefore, among the plurality of through holes 71, some of the plurality of through holes are used as the first through holes 711 for aligning the substrate 7 with the insulator 5 by overlapping with the holes 59. Therefore, the hole 59 that overlaps with the first through hole 711 is used as the first hole 591 for positioning.

Further, some of the other through holes 71 are used as a second through hole 712 for fixing the substrate 7 and the insulator 5 by a fastening member 9 such as a screw fixed from the through hole 71 to the hole 59. Therefore, the hole 59 that overlaps with the second through hole 712 is used as the second hole 592 for fixing. In this embodiment, the substrate 7 and the insulator 5 are positioned by the first through holes 711 and the first hole 591 at three places, and the substrate 7 and the insulator 5 are fixed by the second through holes 712 and the three places. This is done by the second hole 592.

(Manufacturing method of stator 3)
FIG. 7 is an explanatory view showing a method of manufacturing the stator 3 shown in FIG. As shown in FIG. 7, when the substrate 7 is fixed to the insulator 5 in the manufacturing process, the stator 3 of the present embodiment is fitted into the first hole 591 which overlaps with the first through hole 711 of the substrate 7 among the plurality of holes 59. After positioning the substrate 7 with respect to the insulator 5 by penetrating the pin 10 through the first through hole 711, the fastening member 9 is stopped from the second through hole 712 of the substrate 7 to the second hole 592, and the substrate 7 is fixed. Is fixed to the insulator 5.

According to this method, when the substrate 7 is positioned with respect to the insulator 5, the magnetic sensor 8 is positioned with respect to the sensor accommodating portion S. At this point, the substrate 7 is located at a position separated from the insulator 5 on one side L1 in the axis L direction. Therefore, if the substrate 7 is moved toward the insulator 5 along the pin 10, the magnetic sensor 8 becomes a sensor accommodating portion. It is placed inside S.

(Main action and effect of this form)
As described above, in the stator 3 of the present embodiment, the insulator 5 is provided with a plurality of holes 59 that open toward one side in the axis L direction, respectively, at positions that are radially separated from the axis L, and the substrate 7 is provided.
Is provided with a plurality of through holes 71 overlapping in the axis L direction in each of the plurality of holes 59. Therefore, some of the plurality of through holes 71 can be used as the first through holes 711 for aligning the substrate 7 with the insulator 5 by overlapping with the holes 59. Therefore, since the substrate 7 can be easily and surely aligned with the insulator 5, when the substrate 7 is aligned with the insulator 5, the magnetic sensor 8 is unlikely to come into strong contact with the insulator 5 and be damaged. .. Further, if the fastening member 9 is fixed to the hole 59 through the other through hole 71 (second through hole 712) among the plurality of through holes 71, the substrate 7 can be placed at an appropriate position of the insulator 5. Can be fixed.

In particular, in the present embodiment, among the plurality of holes 59, the substrate 7 is made to penetrate the insulator 5 by passing the pin 10 fitted in the first hole 591 that overlaps the first through hole 711 of the substrate 7 through the first through hole 711. Position. Therefore, the substrate 7 can be positioned on the insulator 5 with the substrate 7 separated from the insulator 5 in the axis L direction. Therefore, when the substrate 7 is aligned with the insulator 5, the magnetic sensor 8 is unlikely to come into strong contact with the insulator 5 and be damaged.

Further, the hole 59 is provided in the tubular portion 564 protruding in the radial direction from the plate portion 56 on the inner peripheral side protruding from the end portion of the insulator 5 toward one side L1 in the axis L direction. Therefore, the plate portion 56 on the inner peripheral side can be reinforced by the cylinder portion 564. Therefore, even when the coil wire is routed along the plate portion 56 on the inner peripheral side, the plate portion 56 on the inner peripheral side is less likely to be deformed or damaged. Further, the tubular portion 564 is provided on the second plate portion 562, which has a shorter length in the circumferential direction, among the plate portions 56 on the inner peripheral side. Therefore, the second plate portion 562 can be reinforced by the tubular portion 564. Therefore, of the plate portions 56 on the inner peripheral side, when the coil wire is passed through the outlet 563 between the first plate portion 561 and the second plate portion 562, the second plate portion 562 having a short circumferential length. Even if a load is applied to the coil, the second plate portion 562 is unlikely to be deformed or damaged.

Further, the magnetic sensor 8 has a lead portion 82 extending from the substrate 7 to the other side L2 in the axis L direction, and a sensor portion 81 provided at the end of the lead portion 82 on the other side L2 side in the axis L direction. A sensor accommodating portion S in which the sensor portion 81 is accommodated is provided at an angular position sandwiched between the salient poles 42 adjacent to each other in the circumferential direction in the insulator 5. Therefore, since the sensor portion 81 of the magnetic sensor 8 can be brought close to the magnet 22 of the rotor 2, the magnetic sensor 8 can properly detect the rotation of the rotor 2. Further, since the sensor accommodating portion S includes a first inner wall portion 522 capable of supporting the sensor portion 81 from the circumferential direction and a second inner wall portion 523 capable of supporting the sensor portion 81 from the outside in the radial direction, the sensor is provided. The portion 81 can be arranged at a predetermined position in the sensor accommodating portion S.

[Other Embodiments]
In the above embodiment, the positioning of the substrate 7 and the insulator 5 and the fixing of the substrate 7 and the insulator 5 are all performed at three places, but the positioning of the insulator 5 and the fixing of the substrate 7 and the insulator 5 are performed. For example, it may be performed in two places. Further, the number of positioning points between the substrate 7 and the insulator 5 and the number of fixing points between the board 7 and the insulator 5 may be different.

In the above embodiment, the present invention is applied to the inner rotor type motor, but the present invention may be applied to the outer rotor type motor. In this case, "one side in the radial direction" in the present invention is "diameter". Corresponds to "outside the direction".

1 ... motor, 2 ... rotor, 3 ... stator, 4 ... stator core, 5 ... insulator, 5A ... first insulator member, 5B ... second insulator member, 6 ... coil, 7 ... substrate, 8
... magnetic sensor, 9 ... fastening member, 10 ... pin, 21 ... rotating shaft, 22 ... magnet, 41 ... body, 42 ... salient pole, 51 ... square tube, 52 ... tip insulating part, 53 ... outer flange, 54 ... 1st core covering part, 55 ... 2nd core covering part, 56, 57 ... plate part, 58 ... bottom plate part, 59 ... hole, 71 ... through hole, 81 ... sensor part, 82 ... lead part, 421 ... expansion 422 ... Connecting part, 521 ... Bottom wall part, 522 ... First inner wall part, 523 ... Second inner wall part, 561 ... First plate part, 562 ... Second plate part, 563 ... Drawer port, 591 ... First Hole, 592 ... 2nd hole, 711 ... 1st through hole, 712 ... 2nd through hole, L ... Axis (central axis), S ... Sensor housing

Claims (9)

A trunk extending in the circumferential direction, and a stator core having a plurality of salient poles protruding from the trunk to one side in the radial direction.
An insulator that covers the stator core from the axial direction in which the central axis of the body extends.
A coil wound around each of the plurality of salient poles via the insulator,
A substrate fixed to one end of the insulator in the axial direction,
A magnetic sensor held on the other side of the substrate in the axial direction,
With
The insulator is provided with a plurality of holes that open toward one side in the axial direction at positions that are radially separated from the central axis.
The substrate is provided with a plurality of through holes overlapping in the axial direction in each of the plurality of holes.
Of the plurality of through holes, some of the plurality of through holes are first through holes for aligning the substrate with the insulator by overlapping with the holes, and some other through holes are through holes. A stator characterized by being a second through hole for fixing the substrate and the insulator by a fastening member fixed to the hole. In the stator according to claim 1,
A stator characterized in that the plurality of through holes include a plurality of the second through holes. In the stator according to claim 1 or 2,
The magnetic sensor has a lead portion extending from the substrate to the other side in the axial direction, and a sensor portion provided at the other end portion of the lead portion in the axial direction.
A sensor accommodating portion in which the sensor portion is accommodated is provided at an angular position sandwiched between the salient poles adjacent to each other in the circumferential direction in the insulator.
The stator is characterized in that the sensor accommodating portion is opened toward one side in the axial direction and is open toward one side in the radial direction. In the stator according to claim 3,
The sensor accommodating portion includes a first inner wall portion capable of supporting the sensor portion from the circumferential direction, and a second inner wall portion capable of supporting the sensor portion from the other side in the radial direction. Stator to do. In the stator according to any one of claims 1 to 4,
The insulator includes a plate portion that protrudes from one end in the axial direction toward one side in the axial direction.
The stator is characterized in that the hole is provided in a tubular portion protruding in the radial direction from the plate portion. In the stator according to claim 5,
The plate portion extends in the circumferential direction at a position separated from the first plate portion in the circumferential direction with the first plate portion extending in the circumferential direction, and the length in the circumferential direction is shorter than that of the first plate portion. With the second plate part,
The stator is characterized in that the tubular portion protrudes in the radial direction from the second plate portion. In the stator according to any one of claims 1 to 6,
The stator is characterized in that the magnetic sensor is provided at at least three locations corresponding to the U phase, the V phase, and the W phase. A motor comprising the stator and rotor according to any one of claims 1 to 7. In the method for manufacturing a stator according to any one of claims 1 to 7.
When fixing the substrate to the insulator, the substrate is positioned with respect to the insulator by passing a pin fitted in a hole overlapping the first through hole among the plurality of holes through the first through hole. A method for manufacturing a stator, which comprises the above.

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