JP2022102074A - Motor and pump device - Google Patents

Abstract

To provide a motor having a common terminal which can be easily attached to an insulator at a low cost, and provide a pump device.SOLUTION: In a motor, an insulator held in a stator core holds a common terminal 72 to which an end part 352 of a winding end of a winding 350 of a three-phase extended from ech of coils 35 in a plurality of phases is connected. The common terminal 72 includes: a plate part 720 extended in a peripheral direction; three winding connection part 721 in which parts projected from a plurality of portions in the peripheral direction of the plate part 720 are each bent so as to hold the end part 352 of the winding 350 therein; and two leg parts 725 in total one of which is projected toward an insulator 32 from the plate part 720 per one of adjacent winding connection parts 721. The two leg parts 725 are each in a cross section square, a first hole 326 to which a first leg part 726 is fitted is a circular press-fit hole, and a second hole 327 to which a second leg part 727 is fitted is a square guide hole.SELECTED DRAWING: Figure 6

Description

The present invention relates to a motor including a multi-phase coil and a pump device.

It has a stator core in which a plurality of salient poles are arranged in the circumferential direction around the motor axis, an insulator held by the stator core, and a multi-phase coil wound around each of the plurality of salient poles via an insulator. In a motor, a structure has been proposed in which one end of each of a multi-phase coil is connected to a common terminal in order to electrically connect one end of each of the multi-phase coils to form a common (Patent Document). 1).

The common terminal described in Patent Document 1 is a plate portion extending in the circumferential direction, a leg portion protruding toward the insulator from a plurality of locations in the circumferential direction of the plate portion, and a portion protruding from the plate portion between the leg portions. Is provided with a plurality of winding connections that are bent to hold the windings inward. Here, the winding connection portion is provided so as to be located outside the radial direction of the coil of each phase, and the distance between the winding connection portions in the circumferential direction is wide. For this reason, four legs are provided between the winding connection portions, and one leg is provided at both ends of the plate portion.

JP-A-2017-103913

In the technique described in Patent Document 1, four legs are provided between the winding connection portions, and one leg is provided at both ends of the plate portion. Therefore, since the size of the common terminal in the circumferential direction is long, there is a problem that the cost of the common terminal increases. Further, when the coil has three phases, the number of legs is ten in total, so that there is a problem that it takes a lot of time and effort to attach the common terminal to the insulator.

In view of the above problems, an object of the present invention is to provide a motor and a pump device provided with a common terminal which is inexpensive and easy to attach to an insulator.

In order to solve the above problems, the motor according to the present invention has a stator core in which a plurality of salient poles are arranged in the circumferential direction about the motor axis, an insulator held by the stator core, and the insulator via the insulator. A multi-phase coil wound around each of the plurality of salient poles, and a common terminal held by the insulator and connected to the end of a winding for the number of phases extending from each of the multi-phase coils. The common terminal has a plate portion extending in the circumferential direction and a portion of the plate portion protruding from a plurality of locations in the circumferential direction, respectively, so as to hold the end portion of the winding inward. One of the plurality of winding connection portions bent in the direction of the plate and one of the adjacent winding connection portions is projected from the plate portion toward the insulator and held by the insulator. It is characterized by having a coil and a coil.

In the present invention, in the common terminal, one leg is provided between one of the adjacent winding connection portions. Therefore, since the dimension of the common terminal in the circumferential direction is short, the cost of the common terminal can be reduced. Moreover, since the number of legs is small, it is easy to attach the common terminal to the insulator.

In the present invention, the leg portion can adopt the embodiment provided only between the adjacent winding connection portions among the plurality of winding connection portions. That is, in the common terminal, the legs are not provided at both ends of the plate portion. Therefore, since the dimension of the common terminal in the circumferential direction is short, the cost of the common terminal can be reduced. Moreover, since there are few legs, it is easy to attach a common terminal to the insulator.

In the present invention, it is possible to adopt an embodiment in which the plate portion has a flat plate shape extending linearly along the circumferential direction. That is, since the dimension of the common terminal in the circumferential direction is short, the plate portion of the common terminal may be in the shape of a flat plate, and the step of bending the plate portion is not required. Therefore, the cost of the common terminal can be reduced.

In the present invention, the insulator comprises a plurality of split insulators provided corresponding to each of the plurality of salient poles, and the common terminal is held by any one of the plurality of split insulators. It is possible to adopt the embodiment described above. That is, since the size of the common terminal in the circumferential direction is short, it is possible to realize a structure in which the common terminal is held by one divided insulator. Further, since the common terminal is provided in one divided insulator, the relative position accuracy of the hole into which the leg is fitted is high. Therefore, it is easy to attach a common terminal to the insulator.

In the present invention, the multi-phase coil includes a first-phase coil, a second-phase coil, and a third-phase coil, and the common terminal is provided with three winding connection portions. , The mode in which two legs are provided can be adopted.

In the present invention, the three winding connection portions are the first winding connection portion where the end of the winding extending from the coil of the first phase reaches from one side in the circumferential direction, and the first winding. A second wire connection portion provided on the other side in the circumferential direction with respect to the wire connection portion, and an end portion of a winding extending from the coil of the second phase reaching from the other side in the circumferential direction, and the first wire connection portion. With a third winding connection portion provided between the winding connection portion and the second wire connection portion, the end portion of the winding extending from the coil of the third phase reaches from one side in the circumferential direction. In the insulator, the end of the winding extending from the coil of the third phase is provided between the first winding connection portion and the third winding connection portion. An embodiment in which a recess for a guide leading to the connection portion is provided can be adopted. According to this aspect, even if the winding extending from the coil of the first phase and the winding extending from the coil of the third phase both reach from one side in the circumferential direction, the coil of the third phase Since the winding extending from the guide can be passed through the recess for the guide, it is easy to route the winding to the common terminal.

In the present invention, the insulator is provided with a first hole into which one of the two legs fits and a second hole into which one leg fits, and the first hole is the one. It is possible to adopt an embodiment in which the press-fitting hole into which the leg is fitted and the second hole is a guide hole into which the other leg is fitted. According to this aspect, since the second hole into which the other leg of the two legs fits is for a guide, the common terminal can be attached to the insulator as compared with the case where both of the two legs are press-fitted. It's easy.

In the present invention, both of the two legs are in the shape of a square bar having a quadrangular cross section, the first hole is a round hole having a circular cross section, and the second hole is a square hole having a quadrangular cross section. Can be adopted.

In the present invention, the other leg may be longer than the one leg. According to this aspect, since one of the two legs that fits into the guide hole is long, it is easy to guide the common terminal. Therefore, it is easy to attach the common terminal to the insulator.

In the present invention, the winding connection portion can adopt an embodiment in which the end portion of the winding is held by fusing processing.

The motor according to the present invention can be used for a pump device, in which case the pump device is provided with an impeller that is rotationally driven by the motor.

In the present invention, in the common terminal, one leg is provided between one of the adjacent winding connection portions. Therefore, since the dimension of the common terminal in the circumferential direction is short, the cost of the common terminal can be reduced. Further, since the number of legs is two, it is easy to attach the common terminal to the insulator.

The perspective view which shows one aspect of the pump device and the motor to which this invention is applied. The vertical sectional view of the pump device and the motor shown in FIG. 1. An exploded perspective view showing a state in which the cover is removed from the pump device shown in FIG. 1. An exploded perspective view showing a state in which the substrate is removed from the state shown in FIG. In the motor shown in FIG. 1, an exploded perspective view showing a state in which the housing and the stator are separated. FIG. 5 is a perspective view of the vicinity of the common terminal shown in FIG. 5 as viewed from the inside in the radial direction. FIG. 5 is a perspective view of the vicinity of the common terminal shown in FIG. 5 as viewed from the outside in the radial direction. A perspective view of the common terminal shown in FIG. 5 as viewed from the inside in the radial direction. FIG. 8 is a perspective view of a modified example of the common terminal shown in FIG. 8 as viewed from the inside in the radial direction.

Hereinafter, the motor and the pump device according to the embodiment of the present invention will be described with reference to the drawings. In the following description, the motor axis L direction means the direction in which the motor axis L extends, and the radial direction inside the radial direction and outside the radial direction is the radial direction about the motor axis L. The circumferential direction means the rotation direction about the motor axis L.

(overall structure)
FIG. 1 is a perspective view showing one aspect of the pump device 1 and the motor 10 to which the present invention is applied. FIG. 2 is a vertical sectional view of the pump device 1 and the motor 10 shown in FIG. In FIGS. 1 and 2, the pump device 1 includes a case 2 provided with a suction port 21a and a discharge port 22a, a motor 10 arranged on one side L1 in the L direction of the motor axis with respect to the case 2, and a case 2. It has an impeller 25 arranged in an internal pump chamber 20, and the impeller 25 is rotationally driven around the motor axis L by a motor 10. The motor 10 includes a cylindrical stator 3, a rotor 4 arranged inside the stator 3, a resin housing 6 that covers the stator 3, and a round bar-shaped support shaft 5 that rotatably supports the rotor 4. I have. The support shaft 5 is made of metal or ceramic. In the pump device 1 of the present embodiment, the fluid is a liquid, and the pump device 1 is used under conditions in which the ambient temperature and the fluid temperature are likely to change.

The case 2 constitutes a wall surface 23 of the other side L2 of the pump chamber 20 in the motor axis L direction and a side wall 29 extending in the circumferential direction. The case 2 includes a suction pipe 21 extending along the motor axis L and a discharge pipe 22 extending in a direction orthogonal to the motor axis L, and the suction pipe 21 and the discharge pipe 22 are each provided. A suction port 21a and a discharge port 22a are provided at the ends. The suction pipe 21 is provided concentrically with respect to the motor axis L.

In the motor 10, the stator 3 has a stator core 31, insulators 32 and 33 held by the stator core 31, and a coil 35 wound around the stator core 31 via insulators 32 and 33.

The rotor 4 includes a cylindrical portion 40 extending radially from a position facing the stator 3 toward the pump chamber 20 along the motor axis L, and the cylindrical portion 40 is opened in the pump chamber 20. ing. A cylindrical magnet 47 is held on the outer peripheral surface of the cylindrical portion 40 so as to face the stator 3 on the inner side in the radial direction. The magnet 47 is, for example, a neodymium bond magnet.

In the rotor 4, a disk-shaped flange portion 45 is formed at the end of the cylindrical portion 40 on the other side L2 in the motor axis L direction, and the flange portion 45 is formed from the other side L2 in the motor axis L direction. The disks 26 are connected. A central hole 260 is formed in the center of the disk 26. On the surface of the disk 26 facing the flange portion 45, a plurality of blade portions 261 extending radially outward while curving in an arc shape from the periphery of the central hole 260 are formed at equal angular intervals, and are circular. The plate 26 is fixed to the flange portion 45 via the blade portion 261. Therefore, the flange portion 45 and the disk 26 form an impeller 25 connected to the cylindrical portion 40 of the rotor 4. In this embodiment, the disk 26 is inclined so that the outer side in the radial direction is located closer to the flange portion 45 than the inner side in the radial direction.

In the rotor 4, a cylindrical radial bearing 11 is held inside the cylindrical portion 40 in the radial direction by a method such as caulking, and the rotor 4 is rotatably supported by a support shaft 5 via the radial bearing 11. ing. The first end 51 of L1 on one side L1 of the support shaft 5 in the motor axis L direction is held in a shaft hole 65 formed in the bottom wall 63 of the housing 6. In the case 2, a receiving portion 280 is formed so as to face the second end portion 52 on the pump chamber 20 side of the support shaft 5 on the side of the pump chamber 20 and limit the movable range of the support shaft 5 toward the pump chamber 20 side. ing. The case 2 includes three support portions 27 extending from the inner peripheral surface of the suction pipe 21 to the side of the motor 10. At the end of the support portion 27, a tubular portion 28 in which the support shaft 5 is located inside is formed, and the receiving portion 280 is formed by the bottom portion of the tubular portion 28 on the other side L2 in the motor axis L direction. An annular thrust bearing 12 is mounted on the second end portion 52 of the support shaft 5, and the thrust bearing 12 is arranged between the radial bearing 11 and the tubular portion 28. Here, at least a part of the first end portion 51 and the shaft hole 65 is formed in a D-shaped cross section, and the holes in the second end portion 52 of the support shaft 5 and the thrust bearing 12 are formed in a D-shaped cross section. There is. Therefore, the rotation of the support shaft 5 and the thrust bearing 12 is prevented.

The housing 6 is a partition wall member having a first partition wall portion 61 facing the wall surface 23 of the pump chamber 20 and a second partition wall portion 62 interposed between the stator 3 and the magnet 47. Further, the housing 6 has a cylindrical body portion 66 that covers the stator 3 from the outside in the radial direction. Therefore, the housing 6 is a resin sealing member 60 that covers the stator 3 from both sides in the radial direction and both sides in the motor axis L direction, and is polyphenylene sulfide (PPS: Polyphenylene).
This is a resin portion when the stator 3 is insert-molded by Sulfide) or the like.

(Detailed configuration of motor 10)
FIG. 3 is an exploded perspective view showing a state in which the cover 18 is removed from the pump device 1 shown in FIG. FIG. 4 is an exploded perspective view showing a state in which the substrate 19 is removed from the state shown in FIG. FIG. 5 is an exploded perspective view showing a state in which the housing 6 and the stator 3 are separated from each other in the motor 10 shown in FIG. In FIGS. 3, 4, and 5, the motor axis L direction is upside down with respect to FIGS. 1 and 2, and one side L1 in the motor axis L direction is the upper side of the drawing.

As shown in FIGS. 2, 3, and 4, a cover 18 is fixed to the end portion 64 of the one side L1 in the motor axis L direction of the housing 6 from the one side L1 in the motor axis L direction, and the cover 18 and the cover 18 are fixed. A substrate 19 provided with a circuit for controlling power supply to the coil 35 is arranged between the housing 6 and the bottom wall 63.

The substrate 19 is fixed to the housing 6 by a first fixing portion 97 using the first screw 91 and a second fixing portion 98 using the second screw 92. The housing 6 is formed with a first cylindrical portion 67 projecting from the bottom wall 63 toward one side L1 in the motor axis L direction, and is formed from a tapping screw via a notch 197 formed on the edge of the substrate 19. The first fixing portion 97 is configured by fixing the first screw 91 to the first cylindrical portion 67. Further, the housing 6 is formed with a second cylindrical portion 68 protruding from the bottom wall 63 toward one side L1 in the motor axis L direction on the opposite side of the motor axis L, and is formed on the edge of the substrate 19. The second fixing portion 98 is configured by fixing the second screw 92, which is a tapping screw, to the second cylindrical portion 68 through the formed notch 198.

On the substrate 19, a plurality of first connection portions 191 to which metal winding terminals 71 protruding from the stator 3 through the bottom wall 63 of the housing 6 and projecting to one side L1 in the motor axis L direction are connected by soldering. A second connection portion 192 to which the metal connector terminal 75 held in the housing 6 is connected by soldering is provided. The board 19 is formed with wiring or the like for electrically connecting the second connection portion 192 and the first connection portion 191 via a drive circuit or the like mounted on the board 19.

A cylindrical connector housing 69 is formed in the housing 6, and the end portion of the connector terminal 75 is located inside the connector housing 69. Therefore, when a connector is connected to the connector housing 69 to supply a signal or the like, the signal is input to the drive circuit via the connector terminal 75 and the second connection portion 192, and as a result, the drive current generated by the drive circuit is the first. It is supplied to each coil 35 via 1 connection portion 191 and a winding terminal 71. As a result, the rotor 4 rotates around the motor axis L. As a result, the impeller 25 rotates in the pump chamber 20 and the inside of the pump chamber 20 becomes a negative pressure, so that the fluid is sucked into the pump chamber 20 from the suction pipe 21 and discharged from the discharge pipe 22.

As shown in FIGS. 2 and 5, in the stator 3, the stator core 31 includes an annular portion 311 extending in an annular shape and a plurality of salient poles 312 protruding inward in the radial direction from the annular portion 311. ing. The salient poles 312 are arranged at a constant pitch in the circumferential direction. The stator core 31 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. A concave portion 315 extending in the L direction of the motor axis is formed on the outer peripheral surface of the annular portion 311 corresponding to the plurality of salient poles 312. In the present embodiment, the stator core 31 is formed by bending a member extending linearly into an annular shape and then welding the ends of the annular portions 311 to each other. Therefore, the stator core 31 is provided with a welded portion 310 at one position in the circumferential direction of the annular portion 311 to connect the portions extending in the circumferential direction.

The insulators 32 and 33 each overlap the stator core 31 from both sides in the motor axis L direction and cover each of the plurality of salient poles 312. In the present embodiment, the insulators 32 and 33 are composed of a plurality of divided insulators 320 and 330 that are divided corresponding to each of the plurality of salient poles 312. The plurality of divided insulators 320 and 330 each protrude in the motor axis L direction at the outer peripheral side portions 321 and 331 overlapping the annular portion 311 of the stator core 31 from the motor axis L direction and the radial inner end of the salient pole 312. The coil 35 includes a tubular portion forming portion (not shown) connecting the inner peripheral side portions 322 and 332, the outer peripheral side portions 321 and 331, and the inner peripheral side portions 322 and 332, and the coil 35 has a tubular portion forming portion. It is wound around the salient pole 312 via.

The motor 10 is a three-phase motor. Therefore, the plurality of coils 35 include a first-phase coil 35 (U) composed of a U-phase coil, a second-phase coil 35 (V) composed of a V-phase coil, and a third-phase coil composed of a W-phase coil. 35 (W) are arranged in order. In this embodiment, the first
Three of the phase coil 35 (U), the second phase coil 35 (V), and the third phase coil 35 (W) are arranged, and the total number of the coils 35 is nine. Therefore, a total of nine split insulators 320 are arranged, and the nine split insulators 320 have the same configuration.

In this embodiment, a guide groove 335 of the winding 350 for winding the coil 35 is formed on the outer surface of the outer peripheral side portion 321 of the nine divided insulators 330, and the first phase coil 35 (U) is formed. Consists of one winding. Therefore, the three first phase coils 35 (U) are electrically connected in series. The same applies to the second phase coil 35 (V) and the third phase coil 35 (W).

Further, of the nine divided insulators 320, the divided insulator 320 corresponding to one of the coils 35 (U) of the first phase, the divided insulator 320 corresponding to one of the coils 35 (V) of the second phase, and the divided insulator 320. Winding terminals 71 are each held in the outer peripheral side portion 321 of the split insulator 320 corresponding to one of the third phase coils 35 (W). One end 351 of the winding 350 constituting the three coils 35 connected in series is connected to each of the three winding terminals 71, and the other end 352 is shown in FIGS. 6, 7, and 7. It is electrically connected to a metal common terminal 72 described below with reference to 8. In the present embodiment, the other end portion 352 is the end portion at the start of winding, and the one end portion 351 is the end portion at the end of winding.

The winding terminal 71 protrudes from the split insulator 320 toward one side L1 in the motor axis L direction, and the substrate connection portion 711, which is the tip end portion of the winding terminal 71, is shown in FIGS. 2, 3, and 4. It is connected to the board 19.

(Configuration of common terminal 72)
FIG. 6 is a perspective view of the vicinity of the common terminal 72 shown in FIG. 5 as viewed from the inside in the radial direction. FIG. 7 is a perspective view of the vicinity of the common terminal 72 shown in FIG. 5 as viewed from the outside in the radial direction. FIG. 8 is a perspective view of the common terminal 72 shown in FIG. 5 as viewed from the inside in the radial direction. In FIGS. 6, 7, and 8, as in FIG. 3 and the like, one side L1 in the motor axis L direction is set as the upper side.

As shown in FIGS. 6 and 7, one of the split insulators 320 not provided with the winding terminal 71 extends to the outer peripheral side portion 321 of the split insulator 320 (W) from each of the multi-phase coils 35. A common terminal 72 to which the winding start end 352 of the winding 350 for the number of existing phases is connected is held.

In the present embodiment, in the common terminal 72, the plate portion 720 extending in the circumferential direction with the plate thickness direction directed in the radial direction and the portions protruding from a plurality of locations in the circumferential direction of the plate portion 720 are the ends of the winding 350, respectively. From the plate portion 720 to the split insulator 320 between the plurality of winding connection portions 721 bent so as to hold the portion 352 inward and one of the adjacent winding connection portions 721 among the plurality of winding connection portions 721. It is provided with a leg portion 725 that protrudes one toward the leg portion 725, and the leg portion 725 is held by the split insulator 320. The leg portion 725 is provided only between the adjacent winding connection portions 721 among the plurality of winding connection portions 721. Therefore, since the number of leg portions 725 is small, the plate portion 720 has a short circumferential dimension. Therefore, the plate portion 720 is formed in a flat plate shape extending linearly along the circumferential direction.

Further, the plurality of winding connection portions 721 are bent so as to hold the end portion 352 of the winding 350 inward, and the winding connection portion 721 holds the end portion 352 of the winding 350 by fusing. At the same time, it is electrically connected to the end portion 352 of the winding 350. The fusing process is a thermal caulking process in which the winding 350 and the winding connecting portion 721 are connected by using electric resistance. In this embodiment, since the number of phases is 3, the number of winding connection portions 721 is 3, and the leg portion 7 is provided.
25 is two. Of the two leg portions 725, one leg portion 725 is the first leg portion 726, and the other leg portion 725 is provided on the other side CCW in the circumferential direction with respect to the first leg portion 726. The legs are 727. Corresponding to such a configuration, the split insulator 320 has a first hole 326 into which the first leg portion 726 is fitted and a second leg portion 727 into which the second leg portion 727 is fitted on the other side CCW in the circumferential direction with respect to the first leg portion 726. A hole 327 is provided.

In the present embodiment, the first hole 326 is a press-fit hole into which the first leg portion 726 fits, and the second hole 327 is a guide hole into which the second leg portion 727 fits. Here, both of the two legs 725 have a square bar shape with a quadrangular cross section and have the same thickness. However, the first hole 326 is a round hole with a circular cross section, and the second hole 327 is a square hole with a quadrangular cross section. Therefore, the guide hole can be formed by the second hole 327, and the press-fit hole can be formed by the first hole 326.

The three winding connection portions 721 are the first winding connection portion 721 (U) and the second winding connection portion provided on the other side CCW in the circumferential direction with respect to the first winding connection portion 721 (U). 721 (V) includes a third winding connection portion 721 (W) provided between the first winding connection portion 721 (U) and the second winding connection portion 721 (V). The end portion 352 of the winding 350 extending from the coil 35 (U) of the first phase reaches the first winding connection portion 721 (U) from one side CW in the circumferential direction. The end portion 352 of the winding 350 extending from the coil 35 (V) of the second phase reaches the second winding connection portion 721 (V) from the other side CCW in the circumferential direction. The end portion 352 of the winding 350 extending from the coil 35 (W) of the third phase reaches the third winding connection portion 721 (W) from one side CW in the circumferential direction. Here, in the split insulator 320, the third winding connection portion 721 (W) is provided between the first winding connection portion 721 (U) and the third winding connection portion 721 (W) from the inside in the radial direction. Is provided with a guide recess 329 for guiding the end 352 of the winding 350 extending from the third phase coil 35 (W). More specifically, the recess 329 is a portion cut out at a portion where the surface of the split insulator 320 on one side L1 in the motor axis L direction and the inner surface in the radial direction are connected. Therefore, both the end portion 352 of the winding 350 extending from the coil 35 (U) of the first phase and the end portion 352 of the winding 350 extending from the coil 35 (W) of the third phase are in the circumferential direction. Even when arriving from one side CW, the end portion 352 of the winding 350 extending from the coil 35 (W) of the third phase is connected to the third winding connection portion 721 (W) through the recess 329 for the guide. Since it can be guided, it is easy to connect to the common terminal 72.

As described above, in the motor 10 and the pump device 1 of the present embodiment, the common terminal 72 is provided with one leg portion 725 for each of the adjacent winding connection portions 721. Further, the leg portion 725 is provided only between the adjacent winding connection portions 721 among the plurality of winding connection portions 721, and the leg portions 725 are not provided at both ends of the plate portion 720. Therefore, since the dimension of the common terminal 72 in the circumferential direction is short, the cost of the common terminal 72 can be reduced. Further, since the number of legs 725 is small, it is easy to attach the common terminal 72 to the insulator 32.

Further, since the size of the common terminal 72 in the circumferential direction is short, it is possible to realize a structure in which the common terminal 72 is held by one divided insulator 320. Therefore, the relative positional accuracy of the first hole 326 and the second hole 327 into which the leg portion 725 fits is high. Therefore, the common terminal 72 can be easily attached. Further, since the dimension of the common terminal 72 in the circumferential direction is short, the plate portion 720 of the common terminal 72 may have a flat plate shape and does not require a step of bending the plate portion 720. Therefore, the cost of the common terminal 72 can be reduced.

Further, in the insulator 32, the first hole 326 is a press-fit hole into which the first leg portion 726 fits, and the second hole 327 is a guide hole into which the second leg portion 727 fits. Therefore, the first leg portion 726 can be press-fitted into the first hole 326 while guiding the common terminal 72 by the second leg portion 727 and the second hole 327. Therefore, it is easier to attach the common terminal 72 to the insulator 32 than when both of the two legs are press-fitted.

(Modification example of common terminal 72)
FIG. 9 is a perspective view of a modified example of the common terminal 72 shown in FIG. 8 as viewed from the inside in the radial direction. Since the basic configuration of this embodiment is the same as that of the above embodiment, the same reference numerals are given to the common parts and the description thereof will be omitted.

In the common terminal 72 described with reference to FIG. 8 and the like, the lengths of the first leg portion 726 and the second leg portion 727 are the same, but in this embodiment, the second leg portion 727 for the guide is for press fitting. It is longer than the first leg 726 of. Therefore, when the first leg portion 726 is press-fitted into the first hole 326 while guiding the common terminal 72 by the second leg portion 727 and the second hole 327, the guide of the common terminal 72 is easy.

[Other embodiments]
In the above embodiment, the motor 10 used in the pump device 1 is exemplified, but the present invention may be applied to a motor mounted on another device.

1 ... pump device, 2 ... case, 3 ... stator, 4 ... rotor, 6 ... housing, 10 ... motor, 31 ... stator core, 32, 33 ... insulator, 35 ... coil, 35 (U) ... first phase coil, 35 (V) ... second phase coil, 35 (W) ... third phase coil, 60 ... resin sealing member, 61 ... first partition wall portion, 62 ... second partition wall portion, 63 ... bottom wall, 66 ... Body, 67 ... 1st column, 68 ... 2nd column, 69 ... Connector housing, 71 ... Winding terminal, 72 ... Common terminal, 75 ... Connectac terminal, 97 ... 1st fixing, 98 ... 2nd fixed Unit, 191 ... 1st connection part, 192 ... 2nd connection part, 311 ... Circular part, 312 ... salient pole, 320, 330 ... split insulator, 321, 331 ... outer peripheral side part, 322, 332 ... inner peripheral side part 326 ... 1st hole, 327 ... 2nd hole, 350 ... Winding, 711 ... Board connection part, 720 ... Plate part, 721 ... Winding connection part, 721 (U) ... 1st winding connection part, 721 ( V) ... 2nd winding connection, 721 (W) ... 3rd winding connection, 725 ... Leg, 726 ... 1st leg, 727 ... 2nd leg

Claims (11)

A stator core in which multiple salient poles are arranged in the circumferential direction around the motor axis,
The insulator held in the stator core and
A multi-phase coil wound around each of the plurality of salient poles via the insulator,
A common terminal held by the insulator and connected to the end of the winding for the number of phases extending from each of the multi-phase coils.
Have,
The common terminal has a plate portion extending in the circumferential direction and a plurality of portions of the plate portion protruding from a plurality of locations in the circumferential direction, each of which is bent so as to hold an end portion of the winding inward. A leg portion that protrudes from the plate portion toward the insulator and is held by the insulator between the winding connection portion and one of the adjacent winding connection portions among the plurality of winding connection portions. A motor characterized by having. In the motor according to claim 1,
The motor is characterized in that the legs are provided only between adjacent winding connection portions among the plurality of winding connection portions. In the motor according to claim 1 or 2.
The plate portion is a motor having a flat plate shape extending linearly along the circumferential direction. In the motor according to any one of claims 1 to 3, the motor
The insulator comprises a plurality of divided insulators provided corresponding to each of the plurality of salient poles.
A motor characterized in that the common terminal is held by any one of the plurality of divided insulators. In the motor according to any one of claims 1 to 4, the motor
The multi-phase coil includes a first phase coil, a second phase coil, and a third phase coil.
A motor characterized in that, in the common terminal, three winding connection portions are provided and two leg portions are provided. In the motor according to claim 5,
The three winding connection portions are the first winding connection portion where the end portion of the winding extending from the coil of the first phase reaches from one side in the circumferential direction, and the first winding connection portion. On the other hand, the second wire connection portion provided on the other side in the circumferential direction and the end portion of the winding extending from the coil of the second phase reaches from the other side in the circumferential direction, and the first winding connection portion. A third winding connection portion provided between the second wire connection portion and the third winding connection portion where the end portion of the winding extending from the coil of the third phase reaches from one side in the circumferential direction.
The insulator guides the end of the winding extending from the coil of the third phase between the first winding connection portion and the third winding connection portion to the third winding connection portion. A motor characterized by being provided with a recess for a guide. In the motor according to claim 6,
The insulator is provided with a first hole into which one of the two legs fits and a second hole into which the other leg fits.
The first hole is a press-fit hole into which one of the legs fits.
The second hole is a guide hole into which the other leg is fitted. In the motor according to claim 7,
Both of the two legs have a square bar shape with a quadrangular cross section.
The first hole is a round hole having a circular cross section.
The second hole is a motor characterized by being a square hole having a quadrangular cross section. In the motor according to claim 7 or 8.
The other leg is a motor characterized by being longer than the one leg. In the motor according to any one of claims 1 to 9.
The winding connection portion is a motor characterized in that the end portion of the winding is held by fusing. A pump device including the motor according to any one of claims 1 to 10.
A pump device comprising an impeller that is rotationally driven by the motor.

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