CN218603322U - Partition retainer and motor including the same - Google Patents

Abstract

A partition retainer (2) and a motor (1) including the same are provided, which can prevent a jig Z from interfering with a reinforcing rib on the outer peripheral surface of a cylindrical portion of a partition retainer when a stator is pressed into the partition retainer by the jig Z. The next door holder includes: a cylindrical portion (21) disposed between the rotor and the stator; a bottom part (22) for sealing one end of the cylindrical part; a brim (23) extending radially outward from the other end of the cylindrical portion; and an outer peripheral wall (24) extending from a radially outer end of the rim portion in parallel with the cylindrical portion, wherein a space for accommodating the stator is defined by the cylindrical portion, the rim portion and the outer peripheral wall, a plurality of ribs protruding radially outward are formed on the outer peripheral surface of the cylindrical portion, and if the bottom surface of the bottom portion is a press-fitting surface into which the stator is press-fitted, the plurality of ribs include a plurality of first ribs (211) recessed relative to the press-fitting surface in the axial direction of the cylindrical portion, and the first ribs are recessed relative to the press-fitting surface in the axial direction over the entire radial direction.

Description

Partition retainer and motor including the same

Technical Field

The utility model relates to a next door holder reaches motor including this next door holder.

Background

In the prior art, a motor is known, comprising a rotor; a stator located radially outward of the rotor; and a partition retainer that is interposed between the rotor and the stator and that functions to prevent a fluid in a pump chamber in which the rotor is located from flowing into a location where the stator is disposed. In the motor configured as described above, the partition retainer includes: a cylindrical portion that houses the rotor, the cylindrical portion having an outer peripheral surface on which a plurality of reinforcing ribs protruding radially outward are formed; a bottom portion which closes one end of the cylindrical portion; and a brim portion extending radially outward from the other end of the cylindrical portion. The plurality of reinforcing ribs are flush with the bottom surface of the bottom in the axial direction of the cylindrical portion.

In addition, in order to overcome the defects in the prior art that the stator, the rotor, the circuit substrate and the partition retainer are assembled and fixed by injection molding of the BMC material, i.e., long time is required before thermosetting resin in the BMC material is hardened, the molding efficiency is low, the number of injection molding machines is large compared with thermoplastic resin, and the equipment cost is increased, manufacturers replace the method of encapsulation by pouring, i.e., after the rotor, the stator, the partition retainer and the circuit substrate are assembled, the rotor, the stator, the partition retainer and the circuit substrate are encapsulated integrally by pouring flowing resin until the thermoplastic resin is hardened. In the above method, in order to ensure pouring of the casting resin into the stator, a space surrounded by the stator is required. Therefore, the partition retainer further includes an outer peripheral wall extending from a radially outer end of the flange in parallel with the cylindrical portion, and a space (hereinafter, simply referred to as "space I") surrounding the stator and into which the potting resin is poured is surrounded by the cylindrical portion, the flange, and the outer peripheral wall.

However, the space I defined by the reinforcing ribs and the outer peripheral wall has a limited radial dimension, and therefore, when trying to fit the stator into the space I by the jig Z, the stator can be pressed into the space I only from directly above. Thus, the reinforcing rib may interfere with the jig Z when entering the space I.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above problems, and an object of the present invention is to provide a partition retainer and a motor including the same, which can prevent interference between a jig Z and a reinforcing rib on the outer peripheral surface of a cylindrical portion of the partition retainer when the jig Z presses a stator into the partition retainer.

In order to achieve the above object, a first aspect of the present invention provides a partition retainer for pouring and encapsulating a rotor, a stator, and a circuit board of a motor, including: a cylindrical portion disposed radially between the rotor and the stator; a bottom portion which closes one end of the cylindrical portion; a brim portion extending radially outward from the other end of the cylindrical portion; and an outer peripheral wall extending from a radially outer end of the rim portion in parallel with the cylindrical portion, the rim portion, and the outer peripheral wall defining a space for accommodating the stator, wherein a plurality of ribs protruding radially outward are formed on the outer peripheral surface of the cylindrical portion at predetermined intervals in a circumferential direction, and when a bottom surface of the bottom portion is a press-fitting surface into which the stator is press-fitted, the plurality of ribs include a plurality of first ribs recessed relative to the press-fitting surface in an axial direction of the cylindrical portion, and the first ribs are recessed relative to the press-fitting surface in the axial direction over the entire radial direction.

According to the above configuration, since the plurality of ribs protruding radially outward from the outer peripheral surface of the cylindrical portion include the plurality of first ribs recessed in the axial direction of the cylindrical portion with respect to the press-fitting surface, and the first ribs are recessed in the axial direction with respect to the press-fitting surface over the entire radial direction, when the stator is press-fitted into the space I of the partition wall holder by the jig Z, the jig Z can be prevented from interfering with the first ribs on the outer peripheral surface of the cylindrical portion of the partition wall holder. Thus, the stator can be smoothly pressed into the space I by the jig Z.

The utility model discloses a next door holder of second aspect is on the basis of the next door holder of the first aspect, characterized by, it is a plurality of the rib still includes at least one in the axial of cylindric portion with the second rib of the face parallel and level of impressing.

According to the above configuration, the partitioning wall holder further includes at least one second rib that is flush with the press-fitting surface in the axial direction of the cylindrical portion, and therefore, the second rib can define a gap into which the stator is press-fitted along the circumferential direction of the cylindrical portion. This enables the stator to be reliably press-fitted into the space I.

The utility model discloses a next door holder of third aspect is on the basis of the next door holder of first aspect or second aspect, characterized by, the radial outside end of bottom has the fillet portion more than 1 mm.

According to the above configuration, since the radially outer end of the bottom portion has the rounded portion of 1mm or more, the partitioning wall holder can be guided from the radially inner side into the space I.

The partition retainer of the fourth aspect of the present invention is the partition retainer of the first or second aspect of the present invention, characterized in that the outer peripheral surface of the cylindrical portion is further formed with an axial step portion for positioning the stator axially.

According to the above configuration, since the axial step portion for axially positioning the stator is further formed on the outer peripheral surface of the cylindrical portion, the axial position at which the stator is incorporated into the partition wall holder can be reliably determined.

The utility model discloses a next door holder of fifth aspect is on the basis of the next door holder of the third aspect of the utility model, characterized by, the outer peripheral face of barrel portion still is formed with and is used for right the stator carries out axial direction positioning's axial direction poor part of layer.

According to the above configuration, since the axial step portion for positioning the stator in the axial direction is further formed on the outer peripheral surface of the cylindrical portion, the axial position at which the stator is incorporated into the partition wall holder can be reliably determined.

A sixth aspect of the present invention provides a motor, including: the partition retainer according to any one of the first to fifth aspects; a rotor disposed in the cylindrical portion of the partition retainer; a stator disposed radially outward of the cylindrical portion of the partition retainer; and a circuit board disposed at the bottom of the partition retainer, wherein the rotor, the stator, and the circuit board are encapsulated with the partition retainer by being impregnated with resin.

According to the above configuration, since the motor includes the partition wall holder including the first rib protruding outward in the radial direction from the outer peripheral surface of the cylindrical portion, and the first rib is recessed in the axial direction with respect to the press-fitting surface over the entire radial direction, when the stator is press-fitted into the space I of the partition wall holder by the jig Z, the jig Z can be prevented from interfering with the first rib.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view showing the entire pump apparatus M including the motor 1 of the present embodiment.

Fig. 2 is a perspective view showing the partition holder 2 in the motor 1 of the present embodiment.

Fig. 3A is a schematic view showing the circumferential distribution of reinforcing ribs in the partition wall holder 2 according to the related art, and fig. 3B is a schematic view showing the circumferential distribution of the first ribs 211 and the second ribs 212 in the partition wall holder 2 according to the present embodiment.

Fig. 4 is a schematic view showing a rounded portion 221 of the bottom portion 22 of the partition retainer 2 according to the present invention.

Fig. 5 is a partial perspective view showing a state in which the stator 3 of the motor 1 of the present invention is incorporated in the partition holder 2.

(symbol description)

An M pump device;

z fixture Z;

1, a motor;

2a bulkhead retainer;

21a cylindrical part;

211 a first rib;

212 second ribs;

213 axial step portion;

22 bottom part;

221 a fillet part;

23 eaves;

24 outer peripheral walls;

3, a stator;

31a stator core;

311 a lower end face of the stator core;

32 stator windings;

33 an insulating member;

4, a rotor;

41 a rotating shaft;

42 a rotor magnet;

5, a shell;

51 a first housing;

52 a second housing;

6, a pump;

61 a pump chamber;

62 an impeller;

63 a suction canister;

64 discharge cylinder;

7 a circuit board;

Detailed Description

Hereinafter, embodiments of a partition retainer and a motor including the same according to the present invention will be described with reference to fig. 1 to 5. Fig. 1 is a schematic view showing the entire pump apparatus M including the motor 1 of the present embodiment. Fig. 2 is a perspective view showing the partition holder 2 in the motor 1 of the present embodiment. Fig. 3A is a schematic view showing the distribution of reinforcing ribs in the circumferential direction in the partition wall holder 2 of the related art, and fig. 3B is a schematic view showing the distribution of the first ribs 211 and the second ribs 212 in the circumferential direction in the partition wall holder 2 of the present embodiment. Fig. 4 is a schematic view showing a rounded portion 221 of the bottom portion 22 of the partition retainer 2 according to the present invention. Fig. 5 is a partial perspective view showing a state in which the stator 3 of the motor 1 of the present invention is incorporated in the partition holder 2.

In order to more clearly explain the structure of the partition retainer 2 and the motor 1 including the partition retainer 2 according to the present invention, it is specified in fig. 1 to 5 that the axial direction of the cylindrical portion 21 of the partition retainer 2 is the "Y direction", one side in the Y direction is the Y1 side, the other side is the Y2 side, one direction orthogonal to the Y direction is the X direction, one side in the X direction is the X1 side, the other side is the X2 side, the direction orthogonal to both the Y direction and the X direction is the Z direction, one side in the Z direction is the Z1 side, and the other side is the Z2 side.

(the whole structure of the pump device M of the utility model)

As shown in fig. 1, the pump device M of the present invention includes: a housing 5; a motor 1, the motor 1 being housed in the housing 5 and providing a driving force to the pump device M; a pump 6, the pump 6 pumping fluid using a driving force of the motor 1.

The housing 5 includes a first case 51 on the Y2 side, a second case 52 on the Y1 side, and the outer peripheral wall 24 of the partition holder 2 of the motor 1 between the first case 51 and the second case 52. The first housing 51, the outer circumferential wall 24, and the second housing 52 are fixed together by fixing bolts (not shown), thereby forming a space for housing the motor 1 and a pump chamber 61.

As shown in fig. 1, the motor 1 includes a rotor 4, a stator 3 disposed radially outside the rotor 4, and a partition retainer 2 disposed between the rotor 4 and the stator 3, and the pump 6 includes: and a pump chamber 61 formed by the one-sibling housing 51, the pump chamber 61 accommodating an impeller 62, a suction cylinder 63 extending to the Y2 side being formed on the Y2 side, and a discharge cylinder 64 extending to the X2 side being formed on the X2 side.

Further, as shown in fig. 1, the rotor 4 includes a rotor 41 and a rotor magnet 42, and the rotor 41 is coaxially connected with the impeller 62 via a bearing member so as to transmit a rotational driving force to the impeller 62. As shown in fig. 4, the stator 3 is located radially outside the rotor 4, and includes: a stator core 31, a stator winding 32 wound around the stator 31, and an insulator 33 assembled to the stator core 31 from both sides in the Y direction.

Further, as shown in fig. 2, the bulkhead holder 2 includes a cylindrical portion 21, a bottom portion 22 closing a Y1-side end portion of the cylindrical portion 21, a brim portion 23 extending radially outward from a Y2-side end portion of the cylindrical portion 21, and an outer peripheral wall 24 extending Y1-side from a radially outer-side end portion of the brim portion 23; and a circuit board 7, wherein the circuit board 7 is attached to the cylindrical portion 21 (see fig. 1) to supply power to the stator winding 32 of the stator 3.

According to the pump device M configured as described above, the circuit board 7 supplies power to the stator winding 32, and the stator winding 32 and the rotor magnet of the rotor 4

Further, as shown in fig. 2, the bulkhead holder 2 includes a cylindrical portion 21, a bottom portion 22 closing a Y1-side end portion of the cylindrical portion 21, a brim portion 23 extending radially outward from a Y2-side end portion of the cylindrical portion 21, and an outer peripheral wall 24 extending Y1-side from a radially outer-side end portion of the brim portion 23; and a circuit board 7, wherein the circuit board 7 is mounted between the cylindrical bodies 42, generates an electromotive force by electromagnetic induction, the electromotive force drives the rotation shaft 41 to rotate, the rotation is transmitted to the impeller 62 in the pump chamber 61, and the impeller 62 also rotates to generate a vortex pressure on the fluid sucked into the pump chamber 61 from the suction cylinder 64 and is discharged through the discharge cylinder 64.

As shown in fig. 2, the cylindrical portion 21 of the partition wall holder 2 extends in the Y1 direction from the brim portion 23, and is lower than the outer circumferential wall 24 in the Y direction. A plurality of first ribs 211 and a plurality of second ribs 212 are formed on the outer peripheral surface of the cylinder part 21, wherein the second ribs 212 extend in the entire Y direction of the cylinder part 21, the Y2-side end surface thereof reaches the axial step part 213, the Y1-side end surface thereof reaches the upper surface (i.e., the bottom surface) of the bottom part 22, i.e., is flush with the upper surface (the bottom surface) of the bottom part 22, the Y2-side end surface of the first ribs 211 reaches the axial step part 213, the Y1-side end surface thereof is lower than the upper surface of the bottom part 22 in the Y direction, i.e., the Y1-side surface of the first ribs 211 is recessed in the Y direction relative to the upper surface of the second ribs 212 in the Y direction in the entire radial direction.

According to the partition wall holder 2 and the motor 1 including the partition wall holder 2 as described above, as shown in fig. 2, the surface of the first rib 211 on the Y1 side is lower than the upper surface (i.e., the bottom surface) of the bottom portion 22, and therefore, the radial dimension of the space surrounded by the outer peripheral surface of the cylindrical portion 21 on the Y1 side than the surface of the first rib 211 on the Y1 side and the inner peripheral surface of the outer peripheral wall 24 (hereinafter, simply referred to as "dimension R") is the radial dimension _X ") is larger than a radial dimension of a space surrounded by the outer peripheral surface of the first rib 211 and the inner peripheral surface of the outer peripheral wall 24 (hereinafter, simply referred to as" dimension R ") _Y ") is large. Thus, the jig Z and the second jig Z can be prevented from being pressed into the spaceA rib 211 interferes.

Further, as shown in fig. 3A, in the related art, nine reinforcing ribs 212A protruding radially outward from the outer peripheral surface of the cylindrical portion 21A are formed at predetermined intervals in the circumferential direction of the partitioning wall holder 2, and the nine reinforcing ribs 212A each extend over the entire axial direction of the cylindrical portion 21A. In contrast, when the stator cores 31A each having nine divided stator cores are pressed into the partition wall holder 2, the insulating member of the stator core 31A is pressed from directly above using nine jigs ZA as shown in fig. 3A, so that the stator core 31A is pressed into the partition wall holder 2A. Thus, nine stiffeners 212A require nine fixtures ZA to be prepared.

In contrast, as shown in fig. 3B, in the present embodiment, six first ribs 211 and three second ribs 212 are formed in the circumferential direction of the partition wall holder 2, wherein the upper surfaces (i.e., the surfaces on the Y1 side) of the first ribs 211 are recessed with respect to the upper surfaces (i.e., the bottom surfaces) of the bottom portions 22, and the upper surfaces (i.e., the surfaces on the Y1 side) of the second ribs 212 are flush with the upper surfaces (i.e., the bottom surfaces) of the bottom portions 22. The six first ribs 211 and the three second ribs 212 are arranged so that two first ribs 211 are interposed between every two second ribs 212. Therefore, as shown in fig. 3B, the six first ribs 211 and the three second ribs 212 are divided into three groups, one jig Z is arranged for each group, and the stator core 31 can be pressed into the partition wall holder 2 by the three jigs Z.

Therefore, compared with the prior art, the number of the jigs can be reduced, and the equipment cost is reduced.

Further, in the arrangement structure of the first rib 211 and the second rib 212 on the circumference as shown in fig. 3B, there is a case where the first rib 211 is adjacent to the second rib 212. In this case, a gap into which one of the stator cores 31 is pressed can be reliably defined by the second rib 212 and the first rib 211. Thereby, it is ensured that each of the stator cores 31 can be accurately pressed into the corresponding gap demarcated by the first rib 211 and the second rib 212.

As shown in fig. 4, in the partitioning-wall holder 2, the joint between the cylindrical portion 21 and the bottom portion 22 is formed as a rounded portion 221, and the radius R of the rounded portion 221 is preferably 1mm or more. In this way, when the stator 3 is pressed by the jig Z, the fillet portion 221 can escape from the jig Z in the radial direction. This allows the stator 3 to be smoothly guided into the partition retainer 2.

Fig. 5 shows a state in which the stator 3 is pressed into the partition retainer 2. As shown in fig. 5, the lower end surface 311 of the stator core 31 abuts against the axial step portion 213 of the cylindrical portion 21 to determine the axial position at which the stator 3 is press-fitted into the partition wall holder 2.

Although the partition retainer 2 and the motor 1 including the partition retainer 2 according to the present invention have been described above, the elements of the above embodiments may be combined to obtain the technical solution of the present invention without departing from the spirit of the present invention.

Further, although only the configuration of one six first ribs 211 and three second ribs 212 is illustrated in fig. 3B, it is not limited thereto, and any other configuration may be possible as long as at least one first rib 211 is formed.

In the present embodiment, the rounded portion 221 of the bottom 22 is formed in an arc shape, but may be in a slope shape or other shapes as long as it can escape from the jig Z.

In the present embodiment, the Y2-side end surfaces of the first rib 211 and the second rib 212 are directly connected to the axial stepped portion 213, but the present invention is not limited thereto, and the Y2-side end surfaces of the first rib 211 and the second rib 212 may not extend to the axial stepped portion 213.

Claims (6)

1. A partition retainer for cast-packing a rotor, a stator, and a circuit substrate of a motor, comprising:

a cylindrical portion disposed radially between the rotor and the stator;

a bottom portion which closes one end of the cylindrical portion;

an eave portion extending radially outward from the other end of the cylindrical portion;

and

an outer peripheral wall extending from a radially outer end of the brim portion in parallel with the cylindrical portion,

a space for accommodating the stator is surrounded by the cylindrical portion, the eave portion, and the outer circumferential wall,

it is characterized in that the preparation method is characterized in that,

a plurality of ribs protruding radially outward are formed on the outer peripheral surface of the cylindrical portion at predetermined intervals in the circumferential direction,

when the bottom surface of the bottom portion is a press-fitting surface into which the stator is press-fitted, the plurality of ribs includes a plurality of first ribs recessed relative to the press-fitting surface in the axial direction of the cylindrical portion,

the first rib is recessed relative to the press-fitting surface in the axial direction over the entire radial direction.

2. The bulkhead retainer of claim 1,

the plurality of ribs further includes at least one second rib flush with the press-fitting surface in the axial direction of the cylindrical portion.

3. The bulkhead holder of claim 1 or 2,

the radial outer end of the bottom has a rounded portion of 1mm or more.

4. The bulkhead holder of claim 1 or 2,

an axial step portion for axially positioning the stator is further formed on the outer peripheral surface of the cylindrical portion.

5. The bulkhead retainer of claim 3,

an axial step portion for axially positioning the stator is further formed on the outer peripheral surface of the cylindrical portion.

6. A motor, comprising:

the bulkhead cage of any of claims 1 to 5;

a rotor disposed in the cylindrical portion of the partition retainer;

a stator disposed radially outward of the cylindrical portion of the partition retainer; and

a circuit board disposed at the bottom of the partition retainer,

the rotor, the stator, and the circuit substrate are encapsulated with the partition retainer by being poured with resin.

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