JP2019118252A - Motor and pump device - Google Patents

Abstract

An object of the present invention is to provide a motor in which a connector does not contact a mounting surface when the motor is placed on the mounting surface. A motor includes a stator having coils arranged in a ring, a resin sealing member covering the coils, and a connector. The resin sealing member 13 includes a sealing member bottom portion 65 located on the non-output side L2 of the stator 11 and a connector sealing portion 67 that covers the connector 20 from the output side L1. The sealing member bottom 65 has a connector-side protrusion 80 located between the axis L and the connector 20, and a first anti-connector-side protrusion 81 located on the opposite side of the connector L with respect to the axis L. Is provided. The distal end surface 80a of the connector-side protruding portion 80 and the distal end surface 81a of the first anti-connector-side protruding portion 81 are located on an imaginary surface S located on the opposite output side L2 than the connector 20. In the first anti-connector side protruding portion 81, a first side surface 81b facing one side in the circumferential direction around the axis L and a second side surface 81c facing the other side are inclined surfaces. [Selection diagram] FIG.

Description

  The present invention relates to a motor provided with a connector for connecting an external cable. The present invention also relates to a pump device that drives an impeller with such a motor.

  The pump apparatus which rotates the impeller arrange | positioned in a pump chamber with a motor is described in patent document 1. FIG. In the document, the motor includes a rotor, a stator, a partition member separating the rotor and the stator, a resin sealing member covering the stator on the outer peripheral side of the partition member, and a connector. The rotor is provided with permanent magnets. The stator includes a stator core and a plurality of coils wound around the stator core. The plurality of coils are annularly arranged around the rotation center line of the rotor. The resin sealing member covers the stator to prevent water and the like flowing through the pump chamber from being applied to the coil.

  The ends of the wires that make up each coil are connected to the connector. An external cable is connected to the connector from the outside in the radial direction orthogonal to the rotation center line. Power is supplied to each coil from an external cable through a connector. The connector is located on the outer peripheral side of the plurality of coils, and is covered by the resin sealing member from the inside in the radial direction orthogonal to the rotation center line of the rotor.

JP, 2016-3580, A

  Due to the installation environment of the motor, etc., it may be required to connect an external cable from the opposite output side of the motor to the connector. In such a case, it is necessary to cover the connector from the output side by the resin sealing member and to be able to insert an external cable into the connector from the non-output side.

  Here, when the resin sealing member covers the connector from the output side and the external cable can be inserted into the connector from the non-output side, a part of the connector is exposed to the non-output side. Therefore, when the motor is placed on the work surface with the opposite side down, the exposed portion of the connector may contact the mounting surface of the work surface, and the connector may be damaged.

  Then, the subject of this invention is providing the motor which a connector does not contact with a mounting surface, when it puts on a mounting surface in the attitude | position which made the opposite side the bottom in view of such a point. Another object of the present invention is to provide a pump device for driving an impeller by such a motor.

In order to solve the above-mentioned subject, the motor of the present invention is provided with a rotor, a stator provided with a plurality of coils arranged annularly around the rotation centerline of the rotor and surrounding the rotor, and an outer peripheral side of the plurality of coils. The external cable for supplying power to the plurality of coils is detachable from the opposite output side when one side of the rotation center line direction is the output side and the other side is the opposite output side. And a resin sealing member covering the coil, wherein the resin sealing member is a reverse output side sealing portion located on the reverse output side of the rotor and the stator, and And a connector sealing portion covering the connector from the output side, and the non-output side sealing portion is a connector side protruding portion protruding toward the opposite side between the rotation center line and the connector. And the rotation center line And a non-connector-side protrusion that protrudes to the non-output side on the side opposite to the connector-side protrusion, and the tip surface of the connector-side protrusion and the tip surface of the non-connector-side protrusion are A first side surface that intersects a rotation center line and is located on one virtual surface located on the opposite side of the connector relative to the connector, and facing one side in the circumferential direction around the rotation center line at the non-connector side protrusion The second side surface facing the other side is characterized in that it is an inclined surface which inclines in a direction approaching each other toward the end surface of the non-connector side protrusion.

  According to the present invention, the resin sealing member covering the coil includes the opposite output side sealing portion located on the opposite side of the rotor and the stator. Further, the non-output side sealing portion includes a connector side projecting portion that protrudes to the opposite side between the rotation center line and the connector, and the opposite side to the connector side projection with the rotation center line interposed therebetween. A connector side protrusion is provided. Furthermore, the tip end face of the connector-side protrusion and the tip end face of the non-connector-side protrusion are on the same imaginary plane located on the opposite output side of the connector. Therefore, when the motor is placed on the mounting surface of the work bench or the like with the output side down, the motor mounts the tip end surface of the connector-side protrusion and the tip surface of the non-connector-side protrusion It is self-supporting in the attitude | position (The attitude | position which made the virtual surface and the mounting surface correspond) which contact | abutted. Further, in the self-standing posture, the connector is positioned closer to the output side than the mounting surface (virtual surface). Therefore, the connector does not contact the mounting surface and is not broken. Furthermore, since the connector side protrusion is provided at a position closer to the connector than the rotation center line, the connector can be reliably prevented from contacting the mounting surface.

  Here, in order to provide the protrusion (the connector side protrusion and the non-connector side protrusion) on the resin sealing member, the mold for molding the resin sealing member has a relatively small recess corresponding to the protrusion. It is necessary to provide it. However, when the recess is provided in the mold, there is a problem that the resin injected into the mold does not flow smoothly into the recess, and the filling of the resin into the recess tends to be insufficient. If filling of the resin into the recess becomes insufficient, deformation is likely to occur in the protrusion due to sink marks at the time of molding. In addition, if deformation occurs in the protrusion, the motor may not be stable when the motor is placed on the mounting surface with the opposite output side down, so the connector may contact the mounting surface and be damaged. . With respect to such a problem, in the present invention, in the non-connector side protruding portion, the first side surface facing one side in the circumferential direction and the second side surface facing the other side face the tip end surface of the non-connector side protruding portion It is an inclined surface which inclines in the direction to approach each other. As a result, the recess provided in the mold to form the non-connector-side protrusion is provided with the inclined surface corresponding to the first side surface and the second side surface on the inner wall surface of the recess. Therefore, the resin injected into the mold is guided by the inclined surface and smoothly flows into the recess. As a result, since the resin filling into the concave portion becomes reliable, it is possible to prevent or suppress deformation of the non-connector side projecting portion due to sink marks at the time of molding.

In the present invention, as the non-connector-side protrusion, a first non-connector-side protrusion and a second non-connector-side protrusion provided at a position spaced apart in the circumferential direction from the first non-connector-side protrusion A distal end surface of the connector-side protrusion is longer in the circumferential direction than a tip surface of the first non-connector-side protrusion and a tip surface of the second non-connector-side protrusion, and the connector-side protrusion The area of the front end surface of the second connector may be larger than the area of the front end surface of the first non-connector side protrusion and the area of the front end surface of the second non-connector side protrusion. In this case, the connector-side protrusion can be made larger than each of the first non-connector-side protrusion and the second non-connector-side protrusion. Here, if the connector side protrusion is large, the recess provided in the mold for forming the connector side protrusion can be enlarged. If the recess is large, the resin to be injected into the mold is likely to flow into the recess, so that deformation of the connector-side protrusion due to sink marks during molding can be prevented or suppressed. Further, in this case, each of the first non-connector side protrusion and the second non-connector side protrusion can be made smaller than the connector side protrusion. Therefore, the amount of use of the resin material for molding the resin sealing member can be suppressed. Here, even when each of the first non-connector side protrusion and the second non-connector side protrusion is reduced, a recess for forming the first non-connector side protrusion and the second non-connector side protrusion in the mold The resin flows smoothly because it has an inclined surface for guiding the resin. Therefore, deformation of the first non-connector side protrusion and the second non-connector side protrusion due to sink marks at the time of molding can be prevented or suppressed.

  In the present invention, the first non-connector side protruding portion is a first extension portion extending toward the second non-connector side protruding portion to a first facing portion facing the second non-connector side protruding portion. The second non-connector side protrusion includes a second extending portion extending toward the first non-connector side protrusion at a second opposite portion facing the first non-connector side protrusion, The first protrusion amount of the first extension portion decreases as it approaches the second non-connector-side protrusion, and the second protrusion amount of the second extension portion is on the first anti-connector side. It can be made smaller as it approaches the projection. In this way, the resin injected into the mold and flowing into the recess for forming the first non-connector-side protrusion is the second anti-connector side from the recess for forming the first extension portion It flows towards the side of the recess for forming the projection. Then, the resin smoothly flows into the recess for forming the second non-connector side protrusion through the recess for forming the second extending portion. Further, since the first extending portion and the second extending portion have a shape in which the amount of protrusion decreases toward the tip end side, it is possible to suppress the amount of use of the resin material for forming the resin sealing member.

  In the present invention, the first extension portion extends from an end portion on the opposite side to the side where the connector-side protrusion is located in the first opposing portion, and the second extension portion is the second It can be extended from the end part on the opposite side to the side in which the said connector side protrusion part is located in an opposing part. According to this configuration, the gate for injecting the resin into the mold for molding the resin sealing member, the recess for forming the connector-side protrusion and the recess for forming the first anti-connector-side protrusion The resin tends to flow from the side of the recess for forming the first anti-connector side protrusion to the side of the recess for forming the second anti-connector side protrusion. Therefore, the resin can be reliably filled in the recess for forming the second non-connector side protrusion located away from the gate. In addition, a gate for injecting a resin into a mold for molding the oil sealing member is provided between the recess for forming the connector-side protrusion and the recess for forming the second non-connector-side protrusion. Also in this case, the resin can easily flow from the side of the recess for forming the second non-connector side protrusion to the side of the recess for forming the first anti-connector side protrusion. Therefore, the resin can be reliably filled in the recess for forming the first non-connector side protrusion located away from the gate.

  In the present invention, the stator includes a stator core in which a plurality of coils are wound, and the plurality of coils include a U-phase coil, a V-phase coil, and a W-phase coil, and the U-phase The end of the U-phase conductor constituting the coil, the end of the V-phase conductor constituting the V-phase coil, and the end of the W-phase conductor constituting the W-phase coil The end portion of the U-phase conductor, the end portion of the V-phase conductor, and the connection portion where the end portions of the W-phase conductor are connected to each other are the anti-stator cores. It is desirable to be located on the output side and to overlap with the first non-connector side protrusion when viewed from the rotation center line direction. In this manner, the resin sealing member is configured such that the end of the U-phase conducting wire, the end of the V-phase conducting wire, and the non-output side of the connecting portion connecting the end of the W-phase conducting wire are the first It becomes thicker by the provision of the non-connector side protrusion. Therefore, even when the connection portion moves at the time of molding of the resin sealing member, the connection portion can be prevented from being exposed to the outside from the resin sealing member.

Next, a pump device according to the present invention includes the above motor, a pump chamber, and an impeller disposed in the pump chamber, and the rotor has an output shaft coaxial with the rotation center line. The output shaft extends from the outside of the pump chamber into the pump chamber, and the impeller is connected to the output end of the output shaft.

  According to the present invention, when the pump device is placed on the mounting surface of the work table or the like in a posture in which the opposite output side of the motor is down, the pump device is the tip of the connector side protrusion of the resin sealing member of the motor. It self-supports in the posture which made the tip and the tip side of a field and a non-connector side projection part abut on a mounting side. Further, in the self-standing posture, the connector is positioned closer to the output side than the mounting surface. Therefore, the connector does not contact the mounting surface and is not broken.

  According to the motor of the present invention, when the motor is placed on the mounting surface of the work table with the opposite output side down, the connector of the motor does not contact the mounting surface. Further, also in the pump device, when the pump device is placed on the mounting surface of the work table with the opposite output side of the motor down, the connector of the motor does not contact the mounting surface. Therefore, the connector can be prevented from coming into contact with the mounting surface and being damaged.

It is an appearance perspective view of a pump device to which the present invention is applied. It is sectional drawing of a pump apparatus. It is an exploded perspective view of a motor when it sees from an output side. It is an exploded perspective view of a motor at the time of seeing from the counter-output side. It is a disassembled perspective view of the motor which removed the cover member. It is a perspective view of a stator. It is a side view and a bottom view of a resin sealing member. It is explanatory drawing of the insert molding operation | movement which forms a resin sealing member.

  Hereinafter, embodiments of a pump device and a motor to which the present invention is applied will be described with reference to the drawings.

  FIG. 1 is an external perspective view of a pump device to which the present invention is applied. FIG. 2 is a cross-sectional view of the pump device. The case body is shown by dotted lines in FIGS. 1 and 2. As shown in FIG. 1, the pump device 1 includes a motor 2 and a case body 3 attached to the motor 2. As shown in FIG. 2, a pump chamber 4 is partitioned between the motor 2 and the case body 3. An impeller 5 is disposed in the pump chamber 4. The impeller 5 is attached to an end portion of an output shaft 6 of the motor 2 that extends into the pump chamber 4 from the side of the motor 2 (outside of the pump chamber 4). The case body 3 is provided with a fluid inlet 7 and a fluid outlet 8. The suction port 7 is provided at a position overlapping the axis L of the output shaft 6 of the motor 2. The discharge port 8 is provided in the direction orthogonal to the axis L.

  In this specification, as shown in FIG. 1, the posture in which the case body 3 is positioned upward is taken as a reference posture of the pump device 1, and the pump device 1 and the motor 2 will be described based on the reference posture. The axis L of the output shaft 6 of the motor 2 extends in the vertical direction in the reference posture. The side of the motor 2 from which the output shaft 6 protrudes is the output side L1, and the opposite side is the non-output side L2. Further, the direction orthogonal to the axis L is taken as the radial direction, and the circumference of the axis L is taken as the circumferential direction. An axis L of the output shaft 6 is a rotation center line on which the rotor 10 of the motor 2 rotates. The axis L direction is the rotation center line direction.

FIG. 3 is an exploded perspective view of the motor 2 as viewed from the output side. FIG. 4 is an exploded perspective view of the motor 2 as viewed from the non-output side. In FIGS. 3 and 4, the cover member constituting the housing of the motor 2 is removed from the resin sealing member. FIG. 5 is an exploded perspective view of the motor 2 with the cover member removed. The motor 2 is a three-phase DC brushless motor. As shown in FIG. 3, the motor 2 includes a rotor 10 having an output shaft 6, a stator 11, a housing 12 for housing these, and a connector 20 to which an external cable 18 is connected.

  The housing 12 includes a resin sealing member 13 for covering the stator 11 from the non-output side L2, and a cover member 14 for covering the resin sealing member 13 from the output side L1. The cover member 14 is fixed to an end portion of the output side L1 of the resin sealing member 13. As shown in FIG. 2, the resin sealing member 13 holds the first bearing member 15 that supports the shaft portion on the non-output side L2 of the output shaft 6. The first bearing member 15 supports the shaft portion of the output shaft 6 so as to be movable in the direction of the axis L and to be rotatable about the axis L. As shown in FIG. 4, the cover member 14 holds the second bearing member 16 that supports the middle of the output shaft 6. The second bearing member 16 supports the output shaft 6 movably in the direction of the axis L and rotatably around the axis L. The output shaft 6 penetrates the cover member 14 from the non-output side L2 to the output side L1.

  The case body 3 is placed on the cover member 14 from the output side L1. Thus, the pump chamber 4 is partitioned between the cover member 14 and the case body 3. Further, the output shaft 6 of the motor 2 extends from the outside of the pump chamber 4 into the pump chamber 4.

  As shown in FIG. 4, the connector 20 is covered by the resin sealing member 13 from the output side L1. The connector 20 includes an exposed portion 20a exposed from the resin sealing member 13 at an end portion of the non-output side L2. As shown in FIG. 1, a cable-side connector 19 of an external cable 18 for supplying power to the motor 2 is detachably connected to the connector 20 from the non-output side L2.

  When electric power is supplied from the external cable 18 to the motor 2 through the connector 20, the motor 2 is driven to rotate the impeller 5. When the impeller 5 rotates, a fluid such as water sucked from the suction port 7 is discharged from the discharge port 8 via the pump chamber 4.

(Rotor)
As shown in FIGS. 2, 3 and 5, the rotor 10 includes an output shaft 6, a magnet 25 surrounding the output shaft 6, and a holding member 26 for holding the output shaft 6 and the magnet 25. The magnet 25 is annular and disposed coaxially with the output shaft 6. On the outer peripheral surface of the magnet 25, N poles and S poles are alternately magnetized in the circumferential direction. The output shaft 6 is made of stainless steel. As shown in FIG. 2, an E-ring 27 is fixed to a central portion in the direction of the axis L of the output shaft 6. The E-ring 27 is a metal plate-like member and is fitted in an annular groove formed in the output shaft 6. Further, the E ring 27 is embedded in the end portion of the output side L1 of the holding member 26.

  The rotor 10 further includes a first bearing plate 28 disposed on the non-output side L2 of the holding member 26 and a second bearing plate 29 disposed on the output side L1 of the holding member 26. The first bearing plate 28 and the second bearing plate 29 are substantially annular metal plates. The first bearing plate 28 covers the end face of the non-output side L2 of the holding member 26 in a state where the output shaft 6 penetrates the center hole. Further, the second bearing plate 29 covers the end face of the output side L1 of the holding member 26 and the E ring 27 in a state where the output shaft 6 penetrates through the center hole. The second bearing plate 29 makes surface contact with the E-ring 27. The first bearing plate 28 and the second bearing plate 29 are respectively held by the end face of the non-output side L2 of the holding member 26 and the end face of the output side L1. The sliding heat generated by the sliding of the second bearing plate 29 and the second bearing member 16 when the rotor 10 rotates is transmitted to the output shaft 6 via the E ring 27 and dissipated.

(Stator)
6 (a) is a perspective view of the stator 11 as viewed from the output side L1, and FIG. 6 (b) is a perspective view of the stator 11 as viewed from the non-output side L2. The stator 11 includes an annular stator core 31 positioned on the outer peripheral side of the rotor 10 and a plurality of coils 32 wound around the stator core 31. The stator core 31 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. As shown in FIG. 6, the stator core 31 includes an annular portion 34 and a plurality of salient pole portions 35 projecting radially inward from the annular portion 34. The plurality of salient pole portions 35 are formed at an equal angle pitch, and are arranged at a constant pitch in the circumferential direction. In the present embodiment, the plurality of salient pole portions 35 are formed at an angular pitch of 40 ° with the axis L as a center. Thus, the stator core 31 is provided with nine salient pole portions 35. The inner circumferential end surface 35 a of the salient pole portion 35 is a circular arc surface centered on the axis L, and faces the outer circumferential surface of the magnet 25 of the rotor 10 with a slight gap.

  A coil 32 is wound around each of the plurality of salient pole portions 35 via an insulator 37. Thus, the plurality of coils 32 are annularly arranged around the axis and surround the rotor 10. Each insulator 37 is made of resin and has insulating properties. Each insulator 37 is cylindrical with a collar. Each insulator 37 has an inner collar 38a and an outer collar 38b at both ends in the radial direction.

  Here, among the plurality of insulators 37 attached to each of the plurality of salient pole portions 35, the insulators 37 located inside in the radial direction of the connector 20 are integral with the connector housing 41 of the connector 20. That is, the insulator 37 closest to the connector 20 and the connector housing 41 are integrally molded products of resin. As shown in FIG. 6B, the insulator 37 integrally formed with the connector housing 41 extends outward along the lower end surface of the annular portion 34 of the stator core 31 from the outer flange 38b and continues to the connector 20. A connection 39 is provided.

  Each coil 32 in a state of being wound around the salient pole portion 35 via the insulator 37 protrudes to the output side L1 and the non-output side L2 toward the outer side in the radial direction (the side of the annular portion 34). The coil 32 is constituted by a lead made of an aluminum alloy or a copper alloy. In this example, a lead wire in which an aluminum alloy is covered with a copper alloy is used. Here, the number of salient pole portions 35, insulators 37, and coils 32 is nine. The motor 2 has three phases, three of the nine coils 32 are U-phase coils 32, three of the remaining six are V-phase coils 32, and the remaining three are It is a coil 32 of W phase. The U-phase coil 32, the V-phase coil 32, and the W-phase coil 32 are arranged in this order in the circumferential direction. The U-phase coil 32, the V-phase coil 32, and the W-phase coil 32 may have other arrangements.

  The three U-phase coils 32 are formed by sequentially winding one conducting wire 44 around the three salient pole portions 35, and the three V-phase coils 32 include one conducting wire 44. It is formed by sequentially winding around three salient pole portions 35, and the three W phase coils 32 are formed by sequentially winding one conducting wire 44 around three salient pole portions 35. Be done. As shown to Fig.6 (a), each conducting wire 44 is drawn around between each salient pole part 35 via the outer peripheral side of the outer side collar part 38b of each insulator 37. As shown in FIG.

  As shown in FIG. 6B, the three conducting wires 44 constituting the U-phase coil 32, the V-phase coil 32, and the W-phase coil 32 face the connector 20 at the non-output side L2 of the stator core. It is drawn to the outer peripheral side and connected to the terminal pin 42 of the connector 20. Further, the end of the conducting wire 44 (U-phase conducting wire 44U) constituting the U-phase coil 32, the end of the conducting wire 44 (V-phase conducting wire 44V) constituting the V-phase coil 32, W phase The end portions of the conducting wire 44 (conducting wire 44 W for the W phase) which constitutes the coil 32 of the above are connected to each other on the non-output side L 2 of the stator core to form a common wire 45. For example, the three conducting wires 44U, 44V, 44W are soldered together to form the common wire 45. Here, the end portion of the U-phase conducting wire 44U, the end of the V-phase conducting wire 44V, and the connecting portion 45a where the end of the W-phase conducting wire 44W are connected to each other sandwich the axis L And the connector 20 is located on the opposite side.

As shown in FIGS. 2 and 6, the connector 20 includes a connector housing 41 integrally formed with the insulator 37 and three terminal pins 42 supported by the connector housing 41.
And. The connector 20 is located on the outer peripheral side of the plurality of coils 32 arranged in a ring.

  As shown in FIG. 6, the connector housing 41 includes a frame 47 extending in the direction of the axis L, a sealing portion 48 closing the opening on the output side L1 of the frame 47, and the frame 47 and the sealing portion 48 on the stator core 31 side. And an extending portion 49 extending toward the In the frame portion 47, the male cable side connector 19 is removably inserted from the non-output side L2. An end portion of the non-output side L2 of the frame portion 47 is provided with an exposed portion 20a exposed to the outside from the resin sealing member 13. When the cable-side connector 19 of the external cable 18 includes a hook, the exposed portion 20a is provided with a locking opening 50 for locking the hook. In the extension portion 49, the connection portion 39 of the insulator 37 is continuous from the inner peripheral side.

  As shown in FIG. 6B, the frame portion 47 has a rectangular outline when viewed from the direction of the axis L, and the longitudinal direction of the frame portion 47 is in the circumferential direction. Inside the frame portion 47, two partition walls 51 are provided, which divide the internal space of the frame portion 47 into three parts in the circumferential direction. A through hole 52 penetrating in the direction of the axis L is provided in each of the portions located in each space partitioned by the partition wall 51 in the sealing portion 48.

  The extending portion 49 includes two ribs 53 that protrude to the non-output side L2 and extend from the frame 47 to the annular portion 34 side of the stator core 31. Each rib 53 is located on the inner peripheral side of each partition wall 51 inside the frame 47. As shown in FIG. 6A, in the extended portion 49, a portion located between the two ribs 53, one of the two ribs 53 on one side of the rib 53 located on one side in the circumferential direction. A through hole 54 penetrating in the direction of the axis L is provided in the portion located and in the portion of the two ribs 53 located on the other side of the rib 53 located on the other side in the circumferential direction. Each through hole 54 is located on the inner peripheral side of each through hole 52 provided in the sealing portion 48.

  Each terminal pin 42 is formed by bending a metal wire having a rectangular cross-sectional shape. As shown in FIG. 2, the terminal pin 42 penetrates the through hole 52 of the sealing portion 48 from the output side L1 to the non-output side L2 to extend to the inside of the frame portion 47; A communicating portion 62 extending from the upper end along the upper surface of the extending portion 49 to the annular portion 34 side (the insulator 37 side) of the stator core 31 and a penetrating portion of the extending portion 49 from the end of the annular portion 34 of the communicating portion 62 And a coil wire connection portion 63 extending through the hole 54 from the output side L1 to the non-output side L2. Each terminal pin 42 is press-fit into the through hole 52 of the sealing portion 48 and the through hole 54 of the extending portion 49. Thus, the three terminal pins 42 are arranged at equal intervals in the circumferential direction.

  The external connection portions 61 of the respective terminal pins 42 are located in the three spaces partitioned inside the frame 47 by the partition wall 51. The external connection portions 61 of the terminal pins 42 are prevented from contacting each other by the partition wall 51. The external connection portion 61 is electrically connected to the cable 18 when the cable side connector 19 is connected to the connector 20. Further, a rib 53 is present between two coil wire connection portions 63 adjacent in the circumferential direction in the three coil wire connection portions 63. Thus, the coil wire connection portions 63 are prevented from contacting each other. The coil wire connection portion 63 linearly extends from the connecting portion 62 to the non-output side L2 to reach the non-output side L2 of the stator 11, and a bent portion 63b bent from the straight portion 63a to the stator 11 side. And

Here, as shown in FIG. 6 (b), the connection portion 39 of the insulator 37 is provided with four columns 64 separated in the circumferential direction. The three conducting wires 44 constituting the U-phase coil 32, the V-phase coil 32 and the W-phase coil 32 are drawn to the outer peripheral side toward the connector 20 on the non-output side L 2 of the stator core 31. Then, the three conducting wires 44 are drawn so as to come in contact with the side surfaces of the three columns 64 of the four columns 64, and are connected to the coil wire connection portions 63 of the three terminal pins 42, respectively. Be done. The bent portion 63 b is a retaining portion that prevents the coil 32 wire from coming off the terminal pin 42.

(Resin sealing member)
Next, the resin sealing member 13 will be described. FIG. 7A is a side view of the coil 32, the insulator 37, and the resin sealing member 13 covering the stator core 31 as viewed from the direction orthogonal to the axis L. FIG. FIG. 7B is a bottom view of the coil 32, the insulator 37, and the resin sealing member 13 covering the stator core 31 as viewed from the non-output side L2.

  As shown in FIGS. 4 and 5, the resin sealing member 13 is a disc-like sealing member bottom portion 65 (non-output side sealing portion covering the coil 32, the insulator 37, and the stator core 31 from the non-output side L2. And a sealing member cylindrical portion 66 extending from the sealing member bottom portion 65 to the output side L 1, and a connector sealing portion 67 projecting outward from the sealing member cylindrical portion 66. The resin sealing member 13 covers the coil 32 and the insulator 37. Further, the resin sealing member 13 covers the stator core 31 except for the outer peripheral edge portion of the upper surface of the annular portion 34 and the end portion on the inner peripheral side of the salient pole portion 35.

  As shown in FIG. 5, the sealing member bottom portion 65 is provided with a bearing member holding recess 68 for holding the first bearing member 15 on the facing surface 65 a facing the rotor 10 inside the stator core 31. Here, the first bearing member 15 includes a cylindrical portion 71 provided with a central hole through which the output shaft 6 passes, and a flange portion 72 extending from the upper end of the cylindrical portion 71 to the outer peripheral side. In the first bearing member 15, the cylindrical portion 71 is inserted into the bearing member holding recess 68. Then, the collar portion 72 is abutted from the output side L1 to the opposing surface 65a of the sealing member bottom portion 65 and fixed to the bearing member holding concave portion 68. As shown in FIG. 2, in the state in which the first bearing member 15 is fixed to the bearing member holding recess 68, the collar portion 72 is orthogonal to the axis L. When the rotor 10 is supported by the first bearing member 15, the shaft end portion of the output shaft 6 penetrates the cylindrical portion 71. The flange portion 72 can be in sliding contact with the first bearing plate 28 of the rotor 10 from the non-output side L2.

  As shown in FIGS. 1, 4 and 7, on the lower surface side of the sealing member bottom portion 65, a cylindrical central projecting portion 75 projecting from the central portion to the non-output side L2 and the outer periphery of the central projecting portion 75 An annular projection 76 is provided, which on the side surrounds the central projection 75 and projects on the non-output side L2. An annular surface 77 perpendicular to the axis L is provided between the central projection 75 and the annular projection 76. The central protrusion 75 overlaps the bearing member holding recess 68 in the direction of the axis L. The axis L passes through the center of the central projection 75. The annular projecting portion 76 includes an annular tapered surface 78 which inclines from the annular surface 77 toward the outer peripheral side toward the non-output side L2, and an annular end surface 79 extending outward from the tapered surface 78 in the direction orthogonal to the axis L. .

  The annular end face 79 includes a connector-side protrusion 80 that protrudes to the non-output side L2 at an outer peripheral edge portion where the connector 20 is located at the outer side in the radial direction. The connector-side protrusion 80 is provided at a position near the connector 20 between the axis L and the connector 20. The shape of the tip end surface 80 a of the connector-side protrusion 80 is a rectangular shape that is long in the circumferential direction. The circumferential length of the connector-side protrusion 80 is longer than the circumferential length of the connector 20 (frame 47).

  Further, the annular end face 79 has a first non-connector side projection 81 and a second opposite side projecting to the non-output side L2 at an outer peripheral edge portion located opposite to the connector side projection 80 with the axis L interposed therebetween. A connector side protrusion 82 is provided. The second non-connector side protrusion 82 is provided at a position spaced apart from the first non-connector side protrusion 81 in the circumferential direction. In this example, the first non-connector side protrusion 81 and the second non-connector side protrusion 82 are separated at an angle interval of 90 ° or more around the axis L.

The first non-connector side protrusion 81 and the second non-connector side protrusion 82 respectively extend along the outer peripheral edge of the annular end face 79. The distal end surface 81 a of the first non-connector side protrusion 81 and the distal end surface 82 a of the second non-connector side protrusion 82 each have a parallelogram shape. Here, each of the first non-connector side protrusion 81 and the second non-connector side protrusion 82 is smaller than the connector side protrusion 80. That is, the tip end surface 81 a of the first non-connector side protrusion 81 and the tip end surface 82 a of the second non-connector side protrusion 82 are shorter in the circumferential direction than the tip end surface 80 a of the connector side protrusion 80. Further, the area of the end surface 81 a of the first non-connector side protrusion 81 and the area of the end surface 82 a of the second non-connector side protrusion 82 are smaller than the area of the end surface 80 a of the connector side protrusion 80. In other words, the connector-side protrusion 80 is longer in the circumferential direction than each of the tip surface 81 a of the first non-connector protrusion 81 and the tip surface 82 a of the second non-connector protrusion 82. The area of the end surface 80 a of the portion 80 is larger than the area of the end surface 81 a of the first non-connector side protrusion 81 and the area of the end surface 82 a of the second non-connector side protrusion 82.

  The first side 81b facing the one side in the circumferential direction (facing the side of the connector side protrusion 80) in the first non-connector side protrusion 81 and the other side in the circumferential direction (the side opposite to the connector side protrusion 80) The second side surface 81c is an inclined surface which inclines in a direction approaching each other toward the tip end surface 81a. The inclination angle from the annular end surface 79 of the first side surface 81 b is larger than the inclination angle from the annular end surface 79 of the second side surface 81 c. Similarly, the first side 82 b facing the one side in the circumferential direction (facing the side of the connector side protrusion 80) in the second non-connector side protrusion 82 and the other side in the circumferential direction (opposite to the connector side protrusion 80) The second side surface 82c (facing the side) is an inclined surface which inclines in a direction approaching each other toward the tip end surface 82a. The inclination angle from the annular end surface 79 of the first side surface 82b is larger than the inclination angle from the annular end surface 79 of the second side surface 82c.

  Further, the first non-connector side protruding portion 81 extends toward the second non-connector side protruding portion 82 on the inner peripheral side surface 81 d (first opposing portion) facing the second non-connector side protruding portion 82. A first extending portion 83 is provided. Further, the second non-connector side protruding portion 82 extends toward the first non-connector side protruding portion 81 to the inner peripheral side surface 82 d (second opposing portion) facing the first non-connector side protruding portion 81. A second extended portion 84 is provided. The first extending portion 83 extends from an end portion of the inner peripheral side surface 81 d of the first non-connector protrusion 81 opposite to the side where the connector protrusion 80 is located. On the other hand, the second extending portion 84 extends from an end portion of the inner peripheral side surface 82d of the second non-connector side protrusion 82 opposite to the side where the connector side protrusion 80 is located. Further, the first extending portion 83 and the second extending portion 84 extend along the inner peripheral edge of the annular end surface 79, respectively. The tip of the first extended portion 83 and the tip of the second extended portion 84 face each other with a gap.

  The first extending portion 83 and the second extending portion 84 have a triangular shape in which the cross-sectional shape cut in the direction intersecting with the extending direction is tapered toward the non-output side L2. Further, the first amount of projection from the annular end face 79 of the first extending portion 83 becomes smaller as it approaches the second non-connector side protruding portion 82. Similarly, the second amount of projection from the annular end face 79 of the second extending portion 84 decreases as it approaches the first non-connector side protrusion 81.

  Here, as can be seen by comparing FIG. 4 with FIG. 6 (b), the first non-connector side projecting portion 81 is the end portion of the conducting wire 44 U constituting the U-phase coil 32 and the V-phase The end of the conducting wire 44V constituting the coil 32 and the end of the conducting wire 44W constituting the W-phase coil 32 are provided at positions overlapping with the non-output side L2 of the connecting portion 45a connected to each other. That is, when viewed in the direction of the axis L, the connection portion 45 a and the first non-connector side protruding portion 81 overlap. Further, as shown in FIGS. 2 and 7, the tip end surface 80a of the connector-side protrusion 80, the tip end surface 81a of the first non-connector-side protrusion 81, and the tip surface 82a of the second non-connector-side protrusion 82 It is located on one virtual plane S intersecting the axis L on the non-output side L2 with respect to the protrusion 75 and the connector 20. In the present example, the virtual surface S is orthogonal to the axis L.

  Next, as shown in FIG. 5, the sealing member cylindrical portion 66 is a small diameter cylindrical portion having a smaller outer diameter than the large diameter cylindrical portion 91 and the large diameter cylindrical portion 91 from the non-output side L2 toward the output side L1. And 92. The outer diameter of the large diameter cylindrical portion 91 is larger than the outer diameter of the annular portion 34 of the stator core 31, and the outer diameter of the small diameter cylindrical portion 92 is smaller than the outer diameter of the annular portion 34 of the stator core 31.

  At the boundary between the large diameter cylindrical portion 91 and the small diameter cylindrical portion 92 in the sealing member cylindrical portion 66, a plurality of circles exposing the outer peripheral edge portion of the annular portion 34 of the stator core 31 from the resin sealing member 13 to the output side L1. An arcuate opening 93 is provided. Further, on the outer peripheral side of the arc-shaped opening 93 in the resin sealing member 13, an annular end face 94 orthogonal to the axis L is provided. The exposed portion of the stator core 31 exposed from the arc-shaped opening 93 and the annular end surface 94 are located on the same plane orthogonal to the axis L. The upper end portion of the large diameter cylindrical portion 91 is provided with four locking projections 95 which project outward at equal angular intervals.

  The inner circumferential surface of the sealing member cylindrical portion 66 has a small diameter inner circumferential surface portion 96 from the non-output side L2 to the output side L1, and a large diameter inner circumferential surface portion 97 having a larger inner diameter than the small diameter inner circumferential surface portion 96. And. The radius of curvature of the small diameter inner circumferential surface portion 96 is substantially equal to the radius of curvature of the inner circumferential end surface 35 a of the salient pole portion 35. The small diameter inner circumferential surface portion 96 is provided with a plurality of openings 98 for exposing the inner circumferential end surface 35 a of each salient pole portion 35 of the stator core 31 to the inner circumferential side. Further, the small diameter inner circumferential surface portion 96 is provided with a notch portion 99 which exposes the end portion on the inner circumferential side of each salient pole portion 35 to the output side L1. Each notch 99 is formed in a groove shape extending in the direction of the axis L from the edge of the opening 98 to the upper end edge of the small diameter inner circumferential surface portion 96. By providing the plurality of notches 99, the circumferential center portion of the upper surface of the end portion on the inner circumferential side of each salient pole portion 35 is a salient pole exposed portion 35b exposed to the output side L1. .

  The inner circumferential end surface 35a of each salient pole portion 35 exposed from the opening 98 is continuous with the small diameter inner circumferential surface portion 96 without any step. A rust preventing agent is applied to the inner peripheral side end face 35 a of each salient pole portion 35 exposed from the opening 98. Further, a rust preventive agent is applied also to the salient pole portion exposed portion 35 b of each salient pole portion 35 exposed from the notch portion 99. The rust inhibitor is, for example, an epoxy paint.

  As shown in FIG. 4, the connector sealing portion 67 covers the connector 20 from the output side L1, and exposes a part (exposed portion 20a) of the non-output side L2 to the outside from the resin sealing member 13. . Here, as shown in FIG. 2, the lower end of the connector 20 (frame portion 47) exposed from the resin sealing member 13 to the non-output side L2 does not protrude from the virtual surface S to the non-output side L2 (downward). That is, the virtual surface S is located on the non-output side L2 relative to the connector 20.

  The resin sealing member 13 is formed of BMC (Bulk Molding Compound). In this example, the stator 11 and the connector 20 are disposed in the mold 120, and the resin is injected into the mold 120 and cured to form the resin sealing member 13. That is, the resin sealing member 13 is integrally molded with the stator 11 and the connector 20 by insert molding. Details of insert molding will be described later.

(Cover member)
The cover member 14 is made of resin, and is fixed to the output side L1 of the resin sealing member 13. As shown in FIGS. 3 and 4, the cover member 14 includes a disk-shaped cover member ceiling portion 101 and a cover member cylindrical portion 102 extending from the outer peripheral side of the cover member ceiling portion 101 to the non-output side L2.

As shown in FIG. 3, the cover member ceiling portion 101 is provided with a through hole 103 penetrating in the direction of the axis L at the center. When viewed in the direction of the axis L, the through hole 103 is at a position overlapping the bearing member holding recess 68 of the resin sealing member 13. At a central portion of the top surface of the cover member ceiling portion 101, a circular recess 104 surrounding the through hole 103 is provided. An annular seal member 105 is inserted into the circular recess 104 from the output side L1 and fixed.

  As shown in FIG. 4, a bearing member holding cylindrical portion 107 coaxial with the through hole 103 is provided at the center portion of the surface of the cover member ceiling portion 101 on the non-output side L2. The central hole of the bearing member holding cylindrical portion 107 is a through hole 103. Further, an outer annular rib 108 is provided on the lower surface of the cover member ceiling portion 101 along the outer peripheral edge of the circular shape. Further, on the lower surface of the cover member ceiling portion 101, a circular inner annular rib 109 is provided between the bearing member holding cylindrical portion 107 and the outer annular rib 108. An inner rib 110 radially extending from the bearing member holding cylindrical portion 107 and reaching the inner annular rib 109 is provided between the bearing member holding cylindrical portion 107 and the inner annular rib 109. An outer rib 111 is provided between the inner annular rib 109 and the outer annular rib 108, extending radially from the inner annular rib 109 to reach the outer annular rib 108. The bearing member holding cylindrical portion 107, the outer annular rib 108 and the inner annular rib 109 are coaxial. The lower end surface of the bearing member holding cylindrical portion 107, the lower end surface of the outer annular rib 108, and the lower end surface of the inner annular rib 109 are planes orthogonal to the axis L.

  The amount of projection of the bearing member holding cylindrical portion 107 from the surface on the non-output side L2 of the cover member ceiling portion 101 is larger than the amount of projection of the inner annular rib 109 from the surface on the non-output side L2 of the cover member ceiling portion 101. The surface of the non-output side L2 of the inner rib 110 and the surface of the non-output side L2 of the inner annular rib 109 are on the same plane. The amount of projection of the inner annular rib 109 from the surface on the non-output side L2 of the cover member ceiling portion 101 is larger than the amount of projection of the outer annular rib 108 from the surface on the non-output side L2 of the cover member ceiling portion 101. The surface of the non-output side L2 of the outer rib 111 and the surface of the non-output side L2 of the outer annular rib 108 are on the same plane.

  The second bearing member 16 is held in the central hole of the bearing member holding cylindrical portion 107. Here, the 2nd bearing member 16 arranges the same member as the 1st bearing member 15 shown in FIG. 5 upside down. Therefore, the second bearing member 16 includes a cylindrical portion 71 provided with a central hole through which the output shaft 6 passes, and a flange portion 72 extending from the lower end of the cylindrical portion 71 to the outer peripheral side. The second bearing member 16 is fixed to the bearing member holding cylindrical portion 107 by bringing the flange portion 72 into contact with the bearing member holding cylindrical portion 107 from the non-output side L2. In a state where the second bearing member 16 is fixed to the bearing member holding cylindrical portion 107, the end face of the non-output side L2 of the collar portion 72 is orthogonal to the axis L.

  The second bearing member 16 supports the rotor 10 in a state where the output shaft 6 is penetrated. The cylindrical portion 71 of the second bearing member 16 supports the output shaft 6 (the rotor 10) movably in the direction of the axis L and rotatably supports the same about the axis L. The flange portion 72 can be in sliding contact with the second bearing plate 29 of the rotor 10 from the output side L1. Therefore, the lower position of the first bearing plate 28 of the rotor 10 in sliding contact with the flange portion 72 of the first bearing member 15 when the rotor 10 rotates, and the second bearing plate 29 of the rotor 10 The second bearing member 16 is moved in the direction of the axis L between an upper position in sliding contact with the flange portion 72 of the second bearing member 16.

  The cover member cylindrical portion 102 extends from the outer peripheral side of the outer annular rib 108 to the non-output side L2, as shown in FIGS. 3 and 4. As shown in FIG. 2, the cover member cylindrical portion 102 overlaps the small diameter cylindrical portion 92 of the resin sealing member 13 and covers the upper annular cylindrical portion 115 from the outer peripheral side and the lower side of the upper annular cylindrical portion 115. And a lower annular cylindrical portion 116 located on the outer peripheral side of the large diameter cylindrical portion 91. As shown in FIG. 4, an annular step 117 is provided between the upper annular cylindrical portion 115 and the lower annular cylindrical portion 116 on the inner circumferential surface of the cover member cylindrical portion 102. The annular step portion 117 includes an annular surface 117 a facing the non-output side L2. The annular surface 117 a is a plane orthogonal to the axis L. The lower annular cylindrical portion 116 is provided with a locked portion 118 engaged with the locking projection 95 of the resin sealing member 13 at four places in the circumferential direction.

  Here, the cover member 14 is placed on the resin sealing member 13 from the output side L1 in a state where the rotor 10 is disposed inside the resin sealing member 13 and the rotor 10 is supported by the first bearing member 15. When the cover member 14 is put on the resin sealing member 13, an adhesive is applied to the outer peripheral edge portion of the upper surface of the resin sealing member 13.

  When covering the cover member 14 on the resin sealing member 13, as shown in FIG. 2, the output shaft 6 is made to penetrate the cylindrical portion 71 of the second bearing member 16 held by the cover member 14. The lower end portion of this is fitted to the inner peripheral side of the sealing member cylindrical portion 66 of the resin sealing member 13. Thereby, the cover member 14 and the resin sealing member 13 are positioned in the radial direction, and the axis L of the output shaft 6 and the central axis of the stator 11 coincide with each other. Further, the annular surface 117 a of the annular stepped portion 117 of the cover member cylindrical portion 102 is brought into contact with the annular end face 94 between the large diameter cylindrical portion 91 and the small diameter cylindrical portion 92 of the resin sealing member 13. Thereby, the cover member 14 is positioned with the resin sealing member 13 in the direction of the axis L. Thereafter, the cover member 14 and the resin sealing member 13 are relatively rotated in the circumferential direction, and as shown in FIG. 1, the locking projection 95 of the resin sealing member 13 and the engaged portion 118 of the cover member 14 Engage. Thereby, the cover member ceiling part 101 covers the rotor 10 and the resin sealing member 13 from the output side L1 in a state where the output shaft 6 is penetrated in the direction of the axis L. Further, the output shaft 6 passes through the seal member 105 disposed in the circular recess 104 of the cover member ceiling portion 101. The seal member 105 seals between the output shaft 6 and the cover member 14. Further, the upper annular cylindrical portion 115 of the cover member cylindrical portion 102 surrounds the small diameter cylindrical portion 92 of the resin sealing member 13 from the outer peripheral side.

  When the cover member 14 is fixed to the resin sealing member 13, the rotor 10 is in a lower position in sliding contact with the upper end surface of the flange portion 72 of the first bearing member 15 and the flange portion 72 of the second bearing member 16. The first bearing member 15 and the second bearing member 16 are supported by the first bearing member 15 and the second bearing member 16 so as to be movable in the direction of the axis L and to be rotatable about the axis L between lower positions slidingly contacting the end face.

  Here, the impeller 5 is connected to the upper end portion of the output shaft 6. Thereafter, the case body 3 is placed on the cover member 14 from the output side L1. Thus, the space partitioned between the cover member 14 and the case body 3 becomes the pump chamber 4, and the impeller 5 is disposed in the pump chamber 4.

(Molding of resin sealing member)
FIG. 8 is an explanatory view of the molding operation of the resin sealing member 13. In the resin sealing member 13, the stator 11 is disposed in the mold 120, and the resin is injected into the mold 120 and cured to form the resin sealing member 13. That is, the resin sealing member 13 is integrally molded with the stator 11 by insert molding. Here, as shown in FIG. 8, the mold 120 is provided with a cavity 121 corresponding to the shape of the resin sealing member 13. The cavity 121 has a shape in which the upper and lower sides of the resin sealing member 13 are reversed. That is, the cavity 121 is shaped such that the non-output side L2 of the resin sealing member 13 is located on the upper side after molding. Therefore, on the ceiling surface of the cavity 121, the connector-side recess 125 corresponding to the connector-side protrusion 80, and the first anti-connector-side recess 126 and the second non-connector-side protrusion 82 corresponding to the first anti-connector protrusion 81 A second non-connector side recess 127 corresponding to is provided. Further, in the insert molding, the stator 11 is disposed in the cavity 121 in a state where the upper and lower sides are inverted. That is, in the cavity 121, the stator 11 is in a reverse posture in which the output side L1 is directed downward and the non-output side L2 is directed upward.

Here, as shown in FIG. 5, in the present example, the inner circumferential end surface 35 a of each salient pole portion 35 of the stator core 31 is exposed to the inner circumferential side from the resin sealing member 13. Therefore, in insert molding, a cylindrical mold portion protruding into the cavity 121 is provided in the mold 120, and the outer peripheral surface of the mold portion is brought into contact with the inner peripheral end face 35a of each salient pole portion 35. Position the stator core 31 in the radial direction. Further, in this example, the salient pole portion exposed portion 35 b of each salient pole portion 35 of the stator core 31 is exposed from the resin sealing member 13 to the output side L 1. Further, a plurality of arc-shaped openings 93 are provided in the resin sealing member 13 to expose the outer peripheral edge portion of the annular portion 34 of the stator core 31 to the output side L1. Therefore, in the insert molding, the first contact portion that can contact the die 120 from below with the salient pole exposed portion 35b of each salient pole portion 35 of the stator core 31 in the reverse posture and the outer peripheral edge portion of the annular portion 34 A second contact portion that can contact from below is provided, and the first and second contact portions are brought into contact with the stator core 31 to position the stator core 31 in the direction of the axis L. Thereby, in the present embodiment, the resin sealing member 13 can be formed by injecting the resin into the mold 120 in a state where the stator core 31 disposed in the mold 120 is positioned in the radial direction and the axis L direction. . Therefore, the accuracy of the relative position between the stator core 31 and the resin sealing member 13 is improved.

  Here, the gate 123 for injecting the resin into the mold 120 (inside the cavity 121) is formed between the connector side protrusion 80 and the first non-connector side protrusion 81 in the resin sealing member 13 after molding. It is provided at an angular position. In other words, in the mold 120, the gate 123 has the connector-side recess 125 for forming the connector-side protrusion 80 and the first anti-connector-side recess 126 for forming the first non-connector-side protrusion 81. It is provided between. In addition, the gate 123 is provided on the lower side portion of the cavity 121 (on the upper side portion of the resin sealing member 13 after molding).

  When the resin is injected from the gate 123, the resin flows in the cavity 121 toward the both sides in the circumferential direction around the axis L and flows upward, as shown by the arrow in FIG. Here, when relatively small recesses such as the first anti-connector recess 126 and the second anti-connector recess 127 are provided in the mold 120, the resin injected into the mold 120 is in each recess. The resin does not flow smoothly, and the resin filling into the recess tends to be insufficient. If filling of the resin into the recess becomes insufficient, deformation is likely to occur in the protrusion corresponding to the recess due to sinking during molding.

  With respect to such a problem, in the present example, the first side 81b facing the one side in the circumferential direction and the second side 81c facing the other in the first non-connector side protrusion 81 are the first side protrusion on the other side It is an inclined surface which inclines in the direction which approaches mutually toward the front end surface 81a of the part 81. Similarly, in the second non-connector side protruding portion 82, the first side surface 82b facing one side in the circumferential direction and the second side surface 82c facing the other side face the tip end surface 82a of the second opposite connector side protruding portion 82. It is an inclined surface which inclines in the direction to approach each other. Therefore, the first non-connector side recess 126 provided in the mold 120 to form the first non-connector side projection 81 is inclined to the inner wall surface corresponding to the first side 81b and the second side 81c. The surfaces 128 and 129 are provided. Similarly, the second anti-connector recess 127 provided in the mold 120 to form the second anti-connector protrusion 82 is inclined to the inner wall surface corresponding to the first side 82 b and the second side 82 c. The inclined surfaces 128 and 129 are provided. Therefore, the resin injected into the mold 120 is guided by the inclined surfaces 128 and 129 and smoothly flows into the first anti-connector recess 126 and the second anti-connector recess 127. As a result, since the resin filling into the first anti-connector recess 126 and the second anti-connector recess 127 becomes reliable, the sinking at the time of molding makes the first anti-connector protrusion 81 and the second anti It is possible to prevent or suppress deformation of the connector side protrusion 82.

Further, the resin injected into the mold 120 and flowing into the first anti-connector side recess 126 is a portion from the first extending recess portion 131 to the second anti-connector side recess 127 for forming the first extending portion 83. It flows toward the side. Then, the resin smoothly flows into the second anti-connector side recess 127 through the second extension recess portion 132 for forming the second extension portion 84. Furthermore, the first extending portion 83 extends from the end portion on the opposite side to the side where the connector-side protrusion 80 is located in the first opposing portion, and the second extending portion 84 corresponds to the connector in the second opposing portion It extends from the end portion opposite to the side where the side protrusion 80 is located. Therefore, when the gate 123 is between the connector-side recess 125 for forming the connector-side protrusion 80 and the first anti-connector-side recess 126 for forming the first non-connector-side protrusion 81, The resin is likely to flow from the side of the first non-connector recess 126 to the side of the second non-connector recess 127. Therefore, the resin can be reliably filled in the second anti-connector recess 127 located away from the gate 123.

  Further, since the connector side protrusion 80 is larger than each of the first non-connector side protrusion 81 and the second non-connector side protrusion 82, the connector side protrusion 80 is provided in the mold 120 for forming the connector side protrusion 80. The connector-side recess 125 has a large first non-connector-side recess 126 and a second non-connector-side recess 127. Thereby, the resin to be injected into the mold 120 can easily flow into the connector-side concave portion 125, so that deformation of the connector-side protruding portion 80 due to sink marks at the time of molding can be prevented or suppressed.

  Furthermore, in the present example, the resin sealing member 13 includes the end of the conducting wire 44V, the end of the conducting wire 44U, and the non-output side L2 of the connecting portion 45a connecting the end of the conducting wire 44W with the first non-connector side protrusion It becomes thicker by the amount of 81 provided. Therefore, even when the connecting portion 45 a moves at the time of molding of the resin sealing member 13, the connecting portion 45 a can be prevented from being exposed from the resin sealing member 13 to the outside.

(Action effect)
According to the present embodiment, the resin sealing member 13 covering the coil 32 includes the sealing member bottom 65 located on the non-output side L2 of the rotor 10 and the stator 11. Further, the sealing member bottom portion 65 is provided with a connector side projecting portion 80 projecting to the non-output side L2 between the axis L and the connector 20, and on the opposite side to the connector side projecting portion 80 with the axis L interposed therebetween. A first non-connector side protrusion 81 and a second non-connector side protrusion 82 are provided. Further, the distal end surface 80a of the connector side projecting portion 80, the distal end surface 81a of the first non-connector side projecting portion 81, and the distal end surface 82a of the second non-connector side projecting portion 82 are closer to the output side L2 than the connector 20. It is on the same virtual plane S located. Therefore, when the motor 2 is placed on the mounting surface of the work table or the like with the non-output side L2 facing down, the motor 2 is a tip surface 80a 81a of the three projections 80 81 82. A self-supporting operation is performed in a posture in which the mounting surface 82a is in contact with the mounting surface (a posture in which the virtual surface S matches the mounting surface). Further, in the self-standing posture, the connector 20 is positioned closer to the output side L1 than the mounting surface (virtual surface S). Therefore, the connector 20 does not contact and damage the mounting surface. Furthermore, since the connector-side protrusion 80 is provided at a position closer to the connector 20 than the axis L, the connector 20 can be reliably prevented from contacting the mounting surface.

  Further, also in the pump device 1, when the pump device 1 is placed on the work surface of the work table with the non-output side L2 of the motor 2 down, the connector 20 of the motor 2 does not contact the work surface. . Therefore, it can prevent that the connector 20 contacts with a mounting surface and is damaged.

  Furthermore, in this example, since the first non-connector side protrusion 81 and the second non-connector side protrusion 82 are smaller than the connector side protrusion 80, the resin sealing member 13 is formed. The amount of resin material used can be reduced. On the other hand, even when each of the first non-connector side protrusion 81 and the second non-connector side protrusion 82 is made smaller, in the mold 120, the first non-connector side protrusion 81 and the second non-connector side protrusion 82 The first non-connector side recess 126 and the second non-connector side recess 127 for forming the guide plate have inclined surfaces 128 and 129 for guiding the resin. Thus, the resin flows smoothly into the first non-connector side recess 126 and the second non-connector side recess 127. Therefore, deformation of the first non-connector side protrusion 81 and the second non-connector side protrusion 82 due to sink marks at the time of molding can be prevented or suppressed.

  Further, in this example, since the first non-connector side protrusion 81 includes the first extending portion 83 and the second non-connector side protrusion 82 includes the second extending portion 84, the first non-connector side protrusion 81 is injected into the mold 120. The resin flows from the first extending recess portion 131 toward the second non-connector side recess 127 side. Here, since the first extending portion 83 and the second extending portion 84 have a shape in which the amount of protrusion decreases toward the distal end side, the amount of use of the resin material for forming the resin sealing member 13 can be suppressed. .

  The gate 123 for injecting resin into the mold 120, the connector-side recess 125 for forming the connector-side protrusion 80, and the second non-connector-side recess 127 for forming the second non-connector-side protrusion 82 It may be provided between Also in this case, the resin flows smoothly into the first non-connector side recess 126 and the second non-connector side recess 127 as in the above case. Therefore, the resin can be reliably filled in the first non-connector side recess 126 and the second non-connector side recess 127.

DESCRIPTION OF SYMBOLS 1 ... Pump apparatus, 2 ... Motor, 3 ... Case body, 4 ... Pump room, 5 ... Impeller, 6 ... Output shaft, 7 ... Suction port, 8 ... Discharge port, 10 ... Rotor, 11 ... Stator, 12 ... Housing, 13: resin sealing member, 14: cover member, 15: first bearing member, 16: second bearing member, 18: external cable, 19: cable side connector, 20: connector, 20a: exposed portion, 25: magnet , 26: holding member, 27: E ring, 28: first bearing plate, 29: second bearing plate, 31: stator core, 32: coil, 34: annular portion, 35: salient pole portion, 35a: inner circumferential end face , 35b: salient pole exposed portion, 37: insulator, 38a: inner ridge portion, 38b: outer ridge portion, 39: connection portion, 41: connector housing, 42: terminal pin, 44U: conductive wire (conductor for U phase) , 44 V ... lead (for V phase Wire: 44 W: Wire (wire for W phase) 45: Common wire 45: Connection portion 47: Frame portion 48: Sealed portion 49: Extension portion 50: Locking opening portion 51: Partition wall 52: through hole 53: rib 54: through hole 61: external connection portion 62: connection portion 63: coil wire connection portion 63b: bending portion 63a: linear portion 64: post 65: sealing member bottom portion, 65a: facing surface, 66: sealing member cylindrical portion, 67: connector sealing portion, 68: bearing member holding concave portion, 71: cylindrical portion, 72: collar portion, 75: central projecting portion, 76: annular projection, 77: annular surface, 78: taper surface, 79: annular end surface, 80: connector side projection, 80a: tip surface, 81: first anti-connector side projection, 81a: tip surface, 81b ... First side, 81c: second side, 81d: inner circumferential side (first opposing portion), 82: second opposite Nectar side projection, 82a: tip surface, 82b: first side surface, 82c: second side surface, 82d: inner peripheral side surface (second opposing portion), 83: first extending portion, 84: second extending portion 91: large diameter cylindrical portion 92: small diameter cylindrical portion 93: arc shaped opening portion 94: annular end face 95: locking projection 96: small diameter inner peripheral surface portion 97: large diameter inner peripheral surface portion 98 ... opening portion 99 notch portion 101 cover member ceiling portion 102 cover member cylindrical portion 103 through hole 104 circular recess 105 seal member 107 bearing member holding cylindrical portion 108 outside Annular rib, 109: inner annular rib, 110: inner rib, 111: outer rib, 115: upper annular cylindrical portion, 116: lower annular cylindrical portion, 117: annular stepped portion, 117a: annular surface, 118: engaged Part, 120 ... mold, 121 ... cavity, 123 ... game G, 125: connector-side recess, 126: first anti-connector-side recess, 127: second anti-connector-side recess, 128, 129, inclined surface, 131: first extension recess portion, 132: second extension recess portion , L ... axis line (rotation center line), L 1 ... output side, L 2 ... opposite output side, S ... virtual surface

Claims (6)

With the rotor,
A stator comprising a plurality of coils arranged annularly around a rotation center line of the rotor and surrounding the rotor;
An external cable for supplying power to a plurality of the coils, which is located on the outer peripheral side of the plurality of coils, with one side in the rotation center line direction as the output side and the other side as the output side. A connector that is detachably connected from the opposite side
And a resin sealing member that covers the coil.
The resin sealing member includes an opposite output side sealing portion positioned on the opposite side of the rotor and the stator on the output side, and a connector sealing portion covering the connector from the output side.
The non-output side sealing portion is opposite to the connector side protruding portion with the rotation center line interposed between the connector side protruding portion protruding to the non-output side between the rotation center line and the connector. And a non-connector-side protrusion that protrudes to the non-output side on the side;
The tip end surface of the connector-side protrusion and the tip surface of the non-connector-side protrusion are located on one virtual plane that intersects the rotation center line and is located on the opposite side of the connector with respect to the output.
In the non-connector side protruding portion, the first side surface facing one side in the circumferential direction around the rotation center line and the second side surface facing the other side are in a direction to approach each other toward the tip surface of the non-connector side protruding portion A motor characterized in that it has an inclined surface that inclines. The non-connector-side protrusion includes a first non-connector-side protrusion and a second non-connector-side protrusion provided at a position spaced apart from the first non-connector-side protrusion in the circumferential direction,
The tip surface of the connector-side protrusion is longer in the circumferential direction than the tip surface of the first non-connector-side protrusion and the tip surface of the second non-connector-side protrusion,
The area of the end surface of the connector-side protrusion is larger than the area of the end surface of the first anti-connector-side protrusion and the area of the end surface of the second anti-connector-side protrusion. The motor of item 1. The first non-connector side protrusion includes a first extending portion extending toward the second non-connector side protrusion at a first opposing portion facing the second non-connector side protrusion,
The second non-connector side protruding portion includes a second extending portion extending toward the first non-connector side protruding portion on a second facing portion facing the first non-connector side protruding portion,
The first amount of projection of the first extension portion decreases as it approaches the second non-connector side projection,
The motor according to claim 2, wherein the second amount of projection of the second extended portion decreases as it approaches the first non-connector side projection. The first extension portion extends from an end portion of the first opposite portion opposite to the side where the connector-side protrusion is located,
The motor according to claim 3, wherein the second extending portion extends from an end portion of the second opposite portion opposite to a side where the connector side protrusion is located. The stator includes a stator core in which a plurality of the coils are wound,
The plurality of coils include a U-phase coil, a V-phase coil, and a W-phase coil,
The end of the U-phase lead forming the U-phase coil, the end of the V-phase lead forming the V-phase coil, and the end of the W-phase lead forming the W-phase coil The parts are connected to each other,
The end portion of the U-phase conductor, the end portion of the V-phase conductor, and the connection portion where the end portions of the W-phase conductor are connected to each other are located on the opposite side of the stator core. The motor according to any one of claims 2 to 4, wherein when viewed in the direction of the rotation center line, it overlaps with the first non-connector side protrusion. A motor according to any one of claims 1 to 5;
With the pump chamber,
And an impeller disposed in the pump chamber,
The rotor has an output shaft coaxial with the rotation center line,
The output shaft extends from the outside of the pump chamber into the pump chamber,
The pump device according to claim 1, wherein the impeller is connected to the output end of the output shaft.

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