JP2018133866A - Motor and pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor the cost of which can be reduced and which can be downsized.SOLUTION: In the motor, a stator 6 comprises a terminal pin 26 to which an end of a conductor wire 23a constituting a driving coil 23 is connected, and a connector housing 27 which holds the terminal pin 26. The connector housing 27 is continuous to an outer portion, in the radial direction of a rotor, of an insulation member 25, and a Z1-direction side portion of the connector housing 27 is disposed so as to be closer to the Z1-direction side than the insulation member 25. The terminal pin 26 comprises a second terminal section 26b to which an end of the conductor wire 23a is fixed by soldering, and the second terminal section 26b is disposed on the inner side, in the radial direction of the rotor, than the connector housing 27. A conductor-wire fixation portion, of the second terminal section 26b, to which the end of the conductor wire 23a is fixed, is disposed so as to be closer to the Z1-direction side than a portion, of the driving coil 23, wound around a projection section 24b.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a motor used in a pump device or the like. Moreover, this invention relates to a pump apparatus provided with this motor.

  Conventionally, a motor including a rotor and a stator arranged around the rotor is known (see, for example, Patent Document 1). The motor described in Patent Document 1 is a stepping motor. In this motor, the stator includes a stator core, an insulator, and a winding wound around the insulator. The stator also includes a wiring board that is electrically connected by soldering the ends of the windings, and terminal pins that are fixed to the wiring board. The windings are connected via the terminal pins and the wiring board. Current is supplied.

  In the motor described in Patent Document 1, the insulator and the connector housing are integrally formed, and the connector is constituted by the terminal pins and the connector housing. One end of the connector housing in the axial direction of the rotor is open. The terminal pins are arranged so as to be parallel to the axial direction of the rotor, and one end side of the terminal pins is fixed to the wiring board.

JP 2014-138453 A

  The motor described in Patent Document 1 includes a wiring board in addition to terminal pins as a configuration for supplying current to the windings. Therefore, in the case of the motor described in Patent Document 1, the cost of the motor increases. Moreover, in the motor described in Patent Document 1, a structure for fixing the wiring board is required and an arrangement space for the wiring board is required, which may increase the size of the motor.

  Therefore, an object of the present invention is to provide a motor capable of reducing the cost and miniaturizing. Moreover, the subject of this invention is providing a pump apparatus provided with this motor.

  In order to solve the above-described problems, a motor according to the present invention includes a rotor having a driving magnet and a stator that is formed in a cylindrical shape and disposed on the outer peripheral side of the rotor. The driving coil, a stator core having a plurality of salient pole portions around which each of the plurality of driving coils is wound via each of the plurality of insulating members, and an end portion of a conducting wire constituting the driving coil. A plurality of terminal pins, and a connector housing that holds the plurality of terminal pins, where one of the axial directions of the rotor is a first direction and the opposite direction of the first direction is a second direction, the connector housing is an insulating member Of the connector housing, and at least a first direction side portion of the connector housing is disposed closer to the first direction than the insulating member, The direction end is opened, and the terminal pin is formed in a straight line and arranged in parallel with the axial direction, and at least a part of the terminal pin is arranged inside the connector housing, and on the outside of the connector housing A second terminal portion disposed; and a connecting portion that connects a second direction end of the first terminal portion and a second direction end of the second terminal portion, wherein the second terminal portion is more radially than the connector housing. The lead wire fixing portion, which is the inner terminal and is fixed to the second terminal portion by soldering the end portion of the lead wire, and the end portion of the lead wire portion of the second terminal portion is fixed to the driving coil, It is arranged on the first direction side with respect to the portion wound around the salient pole part.

  In the motor of the present invention, the end portion of the conducting wire constituting the driving coil is fixed to the second terminal portion constituting a part of the terminal pin by soldering. Therefore, in the present invention, the wiring board described in Patent Document 1 is not necessary. Therefore, according to the present invention, the cost of the motor can be reduced. Further, in the present invention, since the wiring board is not required, a structure for fixing the wiring board is not required, and an arrangement space for the wiring board is not required. Therefore, in the present invention, the motor can be reduced in size.

  In the present invention, the connector housing that holds the terminal pins is connected to the outer portion of the insulating member in the radial direction of the rotor. Further, the second terminal portion of the terminal pin to which the end portion of the conducting wire is fixed by soldering is disposed inside the connector housing in the radial direction. Therefore, in the present invention, even if the first terminal portion of the terminal pin is arranged in parallel with the axial direction of the rotor inside the connector housing where the first direction end is open, it is wound around the salient pole portion via the insulating member. It is possible to reduce the length of the lead wire of the rotated drive coil. Therefore, according to the present invention, the drawing operation of the lead wire of the driving coil is facilitated.

  In the present invention, the second terminal portion is disposed on the inner side of the connector housing in the radial direction, and the lead wire fixing portion which is a portion to which the end portion of the lead wire of the second terminal portion is fixed is the driving coil. These are arranged on the first direction side of the portion wound around the salient pole portion. Therefore, in the present invention, even if the first terminal portion of the terminal pin is arranged in parallel with the axial direction of the rotor inside the connector housing whose first direction end is open, And it becomes possible to ensure the work space at the time of soldering the edge part of conducting wire to the 2nd terminal part inside the connector housing in a diameter direction. Therefore, in the present invention, it is possible to easily perform the soldering operation of the end portion of the conducting wire to the terminal pin.

  In the present invention, for example, the second terminal portion is constituted by a straight portion that is formed in a straight line and is arranged in parallel with the first terminal portion, and the first direction side portion of the straight portion is a conducting wire fixing portion. In this case, the configuration of the terminal pin can be simplified.

  In the present invention, the second terminal portion includes a straight portion that is formed in a straight line and is arranged in parallel with the first terminal portion, and a protrusion that protrudes radially inward from the first direction end side of the straight portion. And at least any one of the 1st direction side part and protrusion part of a linear part may be a conducting wire fixing | fixed part. In this case, it is possible to solder the end portion of the conductive wire to the second terminal portion after the end portion of the conducting wire is entangled with the protruding portion. Therefore, it is possible to stabilize the state of the end portion of the conducting wire when the end portion of the conducting wire is soldered to the second terminal portion.

  In the present invention, a convex portion that protrudes inward in the radial direction is formed on the radially inner side surface of the connector housing, and the convex portion is in contact with the end portion in the first direction of the linear portion. Further, on the second direction side, it is preferable that the inner surface in the radial direction of the connector housing and the straight portion are separated from each other.

  If comprised in this way, rotation of the terminal pin at the time of soldering the edge part of conducting wire to the 2nd terminal part (rotation of the terminal pin which makes the axial direction of a rotor the axial direction of rotation), and the radial direction outside It is possible to prevent the second terminal portion from being bent by the convex portion. Therefore, it becomes possible to stabilize the state of the terminal pin when soldering the end portion of the conducting wire to the second terminal portion, and as a result, it is easier to solder the end portion of the conducting wire to the terminal pin. It becomes possible. Also, with this configuration, the radially inner side surface of the connector housing and the straight portion are separated in the radial direction on the second direction side of the convex portion, so that the first direction end portion of the linear portion is the convex portion. Even if it is in contact with the connector, it is possible to suppress deformation of the connector housing due to heat when soldering the end of the conductor to the terminal pin.

  In the present invention, it is preferable that the connecting portion is formed in a linear shape, and a guide portion for guiding the connecting portion is formed on the end surface on the second direction side of the connector housing. If comprised in this way, rotation of the terminal pin at the time of soldering the edge part of conducting wire to the 2nd terminal part (rotation of the terminal pin which makes the axial direction of a rotor the axial direction of rotation) will be prevented by a guide part. It becomes possible. Therefore, it becomes possible to stabilize the state of the terminal pin when soldering the end portion of the conducting wire to the second terminal portion, and as a result, it is easier to solder the end portion of the conducting wire to the terminal pin. It becomes possible.

  In the present invention, the motor includes a plurality of driving coils, a plurality of insulating members, and a resin-made resin sealing member that covers at least the first direction side and the outer peripheral side of the stator core. It is preferable that the terminal pin is prevented from coming off in the second direction. If comprised in this way, it will become possible to prevent the removal of the terminal pin to the 2nd direction side from a connector housing by the comparatively simple structure using a resin sealing member.

  In the present invention, the stator core includes an annular outer peripheral ring portion that constitutes the outer peripheral surface of the stator core, the plurality of salient pole portions project radially inward from the outer peripheral ring portion, and the stator includes an insulating member and a connector housing. It is preferable that the connecting portion is in contact with the end surface on the first direction side of the outer peripheral ring portion and in contact with the first direction side portion of the outer peripheral surface of the outer peripheral ring portion. If comprised in this way, when the external force to the outer side of the radial direction of a rotor will act with respect to a connector housing, it will become possible to receive the force which acts on a connection part in the outer periphery ring part of a stator core. Therefore, it is possible to suppress damage to the connection portion when an external force to the outer side in the radial direction of the rotor acts on the connector housing.

  In the present invention, the stator preferably includes a connecting portion that connects the insulating member and the connector housing, and the connecting portion is preferably formed with a conducting wire guide portion that guides the conducting wire to the second terminal portion. If comprised in this way, it will become possible to perform the drawing-out operation | work of the lead wire of a drive coil more easily.

  In the present invention, the stator includes a connecting portion that connects the insulating member and the connector housing, and the insulating member, the connector housing, and the connecting portion are integrally formed, and the connecting portion penetrates the connecting portion in the axial direction. It is preferable that a through hole in which the second direction side portion of the second terminal portion is disposed is formed. When the connector housing and the connection portion are formed separately from the insulating member and the connector housing and the connection portion are fixed to the insulating member, the connector housing may be detached from the insulating member. If comprised, it will become possible to prevent the connector housing from coming off from the insulating member. In addition, since the insulating member, the connector housing, and the connection portion are formed integrally with each other, the management of the parts before the assembly of the stator is facilitated.

  In the present invention, the stator core includes an annular outer peripheral ring portion that constitutes the outer peripheral surface of the stator core, and the plurality of salient pole portions protrude radially inward from the outer peripheral ring portion and are constant in the circumferential direction of the rotor. The outer peripheral ring portions are configured by the same number of outer peripheral portions as the plurality of salient pole portions, the plurality of outer peripheral portions are arranged in the circumferential direction, and each of the plurality of outer peripheral portions has one piece. The salient poles are connected, and a seam is formed at one of the boundaries of the outer peripheral part in the circumferential direction, and the remaining part except for one part of the boundary of the outer peripheral part in the circumferential direction is formed. Is formed with a core connecting portion that connects the outer ends of the outer peripheral portion in the circumferential direction, and the stator includes a connecting portion that connects the insulating member and the connector housing, and the connector housing and the connecting portion are integrally formed and connected. The connector-side engagement portion that can be engaged with the insulation member is formed, and the insulation member-side engagement portion that can be engaged with the connector-side engagement portion is formed in each of the plurality of insulation members. preferable.

  The stator core is formed with a joint at one place on the boundary of the outer peripheral part in the circumferential direction, and the outer circumference in the circumferential direction is left at the remaining part except for one part of the boundary of the outer peripheral part in the circumferential direction. In the case of a so-called curling core in which a core connecting part that connects the outer ends of the part is formed, the driving coil is provided via an insulating member in the state of a band-shaped core before the annular outer peripheral ring part is formed. When wound around the salient pole part, it may be necessary to change the mounting position of the connector housing with respect to the stator core according to the motor specifications, etc., but if configured in this way, the connecting part is engaged with the insulating member. The connector-side engaging portion is formed, and each of the plurality of insulating members is formed with an insulating-member-side engaging portion that can be engaged with the connector-side engaging portion. Without changing the, it is possible to change the mounting position of the connector housing relative to the stator core. Therefore, it is possible to easily change the mounting position of the connector housing with respect to the stator core.

  In the present invention, the insulating member side engaging portion is two projections that protrude in the first direction side of the insulating member and are spaced apart in the circumferential direction, and the connector side engaging portion is It is preferable that there are two recesses into which each of the two protrusions fits. If comprised in this way, it will become possible to attach a connection part to an insulating member by the comparatively simple structure using two protrusion parts and two recessed parts.

  The motor of this invention can be used for a pump apparatus provided with the impeller fixed to the rotating shaft of a rotor. In this pump device, the cost of the motor can be reduced and the motor can be miniaturized. Further, in this pump device, it is possible to easily perform the operation of drawing out the lead wire of the driving coil and to easily solder the end portion of the conductive wire to the terminal pin.

  As described above, according to the present invention, the cost of the motor can be reduced and the motor can be miniaturized.

It is sectional drawing of the pump apparatus with which the motor concerning embodiment of this invention is integrated. It is a perspective view of the stator with a resin sealing member shown in FIG. It is a perspective view of the stator shown in FIG. It is a figure for demonstrating the structure of the stator core shown in FIG. It is a perspective view of a part of an insulator with a connector shown in FIG. It is a perspective view which shows a part of insulator with a connector shown in FIG. 5 from a different direction. It is sectional drawing of the insulator with a connector shown in FIG. It is sectional drawing of the insulator with a connector concerning other embodiment of this invention. It is a perspective view of the insulator with a connector concerning other embodiments of the present invention. It is a perspective view of the state which decomposed | disassembled the connector and insulator shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Overall configuration of pump device)
FIG. 1 is a cross-sectional view of a pump device 1 in which a motor 3 according to an embodiment of the present invention is incorporated. FIG. 2 is a perspective view of the stator 6 with the resin sealing member 12 shown in FIG. FIG. 3 is a perspective view of the stator 6 shown in FIG. FIG. 4 is a diagram for explaining the configuration of the stator core 24 shown in FIG. In the following description, the Z1 direction side in FIG. 1 or the like is referred to as the “upper” side, and the Z2 direction side in FIG.

  The motor 3 of this embodiment is used by being incorporated in the pump device 1. The pump device 1 includes an impeller 2 that is rotated by the power of a motor 3. The motor 3 is a DC brushless motor and includes a rotor 5 and a stator 6. The motor 3 of this embodiment is a three-phase brushless motor. The rotor 5 is disposed so that the axial direction of the rotor 5 coincides with the vertical direction. That is, the vertical direction is the axial direction of the rotor 5.

  The upward direction (Z1 direction) of this embodiment is a first direction that is one of the axial directions of the rotor 5, and the downward direction (Z2 direction) is the opposite direction of the first direction (that is, the axial direction of the rotor 5). The other direction is the second direction. In the following description, the radial direction of the rotor 5 is referred to as “radial direction”, and the circumferential direction (circumferential direction) of the rotor 5 is referred to as “circumferential direction”.

  The impeller 2, the rotor 5, and the stator 6 are disposed inside the pump case except for an upper end side portion of a connector housing 27 described later. The pump case includes a housing 8 that constitutes a part of the motor 3 and a case body 9 that is fixed to the lower end of the housing 8. The case body 9 is formed with a fluid suction port 9a and a fluid discharge port 9b. A region surrounded by the housing 8 and the case body 9 is a pump chamber 10 through which the fluid sucked from the suction port 9a passes toward the discharge port 9b. A sealing member (not shown) for securing the sealing property of the pump chamber 10 is disposed at a joint portion between the housing 8 and the case body 9. The housing 8 includes a resin-made resin sealing member 12 that covers the stator 6 and a cover member 13 that is fixed to the lower end side of the resin sealing member 12.

  The rotor 5 includes a rotating shaft 14, a driving magnet 15, and a sleeve 16. The rotating shaft 14 is disposed so that the axial direction of the rotating shaft 14 coincides with the vertical direction. The sleeve 16 is formed in a substantially cylindrical shape with a hook having flanges at both ends in the vertical direction. The sleeve 16 is fixed to the outer peripheral surface of the upper end side portion of the rotating shaft 14. The drive magnet 15 is fixed to the outer peripheral surface of the sleeve 16. The drive magnet 15 is disposed between the flanges of the sleeve 16 formed at both ends in the vertical direction. N poles and S poles are alternately magnetized in the circumferential direction on the outer circumferential surface of the drive magnet 15.

  The impeller 2 is fixed to the lower end portion of the rotating shaft 14. The impeller 2 is disposed inside the pump chamber 10. The rotary shaft 14 is rotatably supported by two bearings 17 and 18 arranged so as to sandwich the sleeve 16 in the vertical direction. The bearings 17 and 18 are sliding bearings and are formed in a cylindrical shape with a flange. The bearing 17 disposed below the sleeve 16 is fixed to the cover member 13, and the bearing 18 disposed above the sleeve 16 is fixed to the resin sealing member 12. That is, the rotating shaft 14 is rotatably supported by the cover member 13 via the bearing 17 and is rotatably supported by the resin sealing member 12 via the bearing 18.

  The bearing 17 is fixed to the cover member 13 with the flange portion of the bearing 17 disposed on the upper side, and the bearing 18 is fixed to the resin sealing member 12 with the flange portion of the bearing 18 disposed on the lower side. ing. An annular bearing plate 19 with which the flange portion of the bearing 17 can contact is fixed to the lower end side of the sleeve 16. An annular bearing plate 20 that can contact the flange of the bearing 18 is fixed to the upper end side of the sleeve 16. In this embodiment, the bearings 17 and 18 function as radial bearings of the rotor 5, and the bearings 17 and 18 and the bearing plates 19 and 20 function as thrust bearings of the rotor 5. An annular seal member 21 is disposed below the bearing 17. The seal member 21 is fixed to the cover member 13. The inner peripheral surface of the seal member 21 is in contact with the outer peripheral surface of the rotating shaft 14.

  The stator 6 is formed in a cylindrical shape as a whole. Specifically, the stator 6 is formed in a substantially cylindrical shape. The stator 6 is disposed so that the axial direction of the stator 6 coincides with the vertical direction. The stator 6 is disposed on the outer peripheral side of the rotor 5. The stator 6 includes a plurality of drive coils 23, a stator core 24, a plurality of insulators 25 as a plurality of insulating members, a plurality of terminal pins 26, a connector housing 27 that holds the plurality of terminal pins 26, and the insulator 25. And a connector 28 that connects the connector housing 27 to each other.

  The stator core 24 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. The stator core 24 includes an outer peripheral ring portion 24a formed in an annular shape and a plurality of salient pole portions 24b protruding from the outer peripheral ring portion 24a toward the inner side in the radial direction. The stator core 24 of this embodiment includes nine salient pole portions 24b. The nine salient pole portions 24b are formed at an equiangular pitch, and are arranged at regular intervals in the circumferential direction. Note that the number of salient pole portions 24b included in the stator core 24 may be other than nine.

  The outer peripheral ring portion 24a is formed in an annular shape, and the shape of the outer peripheral surface of the outer peripheral ring portion 24a when viewed from the vertical direction is a circular shape. The outer peripheral surface of the outer peripheral ring portion 24 a constitutes the outer peripheral surface of the stator core 24. The upper end surface and the lower end surface of the outer peripheral ring portion 24a are planes orthogonal to the vertical direction. Moreover, the outer periphery ring part 24a is comprised by the nine outer peripheral parts 24c arranged in the circumferential direction. That is, the outer peripheral ring portion 24a is configured by the same number of outer peripheral portions 24c as the salient pole portions 24b.

  The salient pole part 24b is formed in the center of the outer peripheral part 24c in the circumferential direction. That is, one salient pole portion 24b is connected to each of the nine outer peripheral portions 24c. A tip end portion (a radially inner end portion) of the salient pole portion 24b is formed in a substantially arc shape extending toward both sides in the circumferential direction. The tip surface of the salient pole portion 24 b faces the outer peripheral surface of the drive magnet 15.

  Further, the stator core 24 includes a belt-like core portion 24d (see FIG. 4A) constituted by nine outer peripheral portions 24c connected in a straight line, as shown in FIG. 4, between the outer peripheral portion 24c and the outer peripheral portion 24c. It is a curling core formed by bending at the boundary and connecting the ends. That is, the stator core 24 bends a core core composed of a strip-shaped core portion 24d and nine salient pole portions 24b that project from the strip-shaped core portion 24d in a direction perpendicular to the longitudinal direction of the strip-shaped core portion 24d. It is formed in an annular shape by connecting the ends.

  For this reason, as shown in FIG. 4B, a joint 24e is formed at one of the boundaries of the nine outer peripheral portions 24c in the circumferential direction. In this embodiment, the end portions of the band-shaped core portion 24d are welded and fixed to each other at the joint 24e, and a weld mark is formed at the joint 24e. In addition, the outer ends of the outer peripheral portion 24c in the circumferential direction are adjacent to the boundaries of the remaining eight outer peripheral portions 24c except for one portion where the joint 24e is formed among the boundaries of the nine outer peripheral portions 24c in the circumferential direction. A core connection portion 24f is formed to connect the two.

  The insulator 25 is made of an insulating material such as resin. The insulator 25 is attached to each salient pole portion 24b, and the stator 6 includes nine insulators 25. The insulator 25 is formed in a tubular shape with a flange having flanges at both ends, and the salient pole portion 24b so that the axial direction of the insulator 25 formed in the tubular shape matches the radial direction of the stator 6. Is attached.

  The insulator 25 includes a first cover portion 25a that covers the salient pole portion 24b, and a second cover portion 25b that covers a part of the inner peripheral surface of the outer peripheral ring portion 24a and a part of both upper and lower end surfaces of the outer peripheral ring portion 24a. I have. The second cover portion 25b covers a part of the inner peripheral surface of the outer peripheral ring portion 24a from the inside in the radial direction. The second cover portion 25b covers a part of the upper end surface of the outer peripheral ring portion 24a from the upper side and covers a part of the lower end surface of the outer peripheral ring portion 24a from the lower side.

  The upper end surface and the lower end surface of the second cover portion 25b are planes orthogonal to the vertical direction. The second cover portion 25b includes two protrusion portions 25c that protrude upward from the upper end surface of the second cover portion 25b, and two protrusion portions 25d that protrude downward from the lower end surface of the second cover portion 25b. Is formed. In other words, the insulator 25 is formed with two protrusions 25 c that protrude upward from the insulator 25 and two protrusions 25 d that protrude downward from the insulator 25. The two protrusions 25c are arranged with a gap in the circumferential direction, and the two protrusions 25d are arranged with a gap in the circumferential direction. The protrusions 25c and 25d have a circular arc shape when viewed from the vertical direction.

  One of the two protruding portions 25c is formed from one end of the second cover portion 25b in the circumferential direction toward the other end side in the circumferential direction, and the other protruding portion 25c is the first protruding portion 25c in the circumferential direction. The two cover portions 25b are formed from the other end toward one end side in the circumferential direction. Similarly, one of the two protruding portions 25d is formed from one end of the second cover portion 25b in the circumferential direction toward the other end side in the circumferential direction, and the other protruding portion 25d is formed in the circumferential direction. It is formed from the other end of the second cover portion 25b in the direction toward one end side in the circumferential direction.

  The connector housing 27 and the connection portion 28 are formed of an insulating material such as resin. In this embodiment, the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed. Specifically, one of the nine insulators 25, the connector housing 27, and the connection portion 28 are integrally formed. That is, one of the nine insulators 25 is an insulator 25 with a connector housing 27.

  The connector housing 27 is connected to the outer portion of the insulator 25 in the radial direction. Further, the connector housing 27 is connected to the upper portion of the insulator 25. Specifically, the connection portion 28 is an upper portion of the insulator 25 and is connected to a radially outer portion of the insulator 25, and the connector housing 27 is connected to the insulator 25 via the connection portion 28. The upper portion is connected to the radially outer portion of the insulator 25.

  The upper portion of the connector housing 27 is disposed above the insulator 25. In this embodiment, most of the connector housing 27 excluding a part on the lower end side of the connector housing 27 is disposed above the insulator 25. Detailed configurations of the connector housing 27 and the connecting portion 28 will be described later.

  The driving coil 23 is constituted by a conducting wire 23a made of an aluminum alloy or a copper alloy. The driving coil 23 is wound around the salient pole portion 24 b via an insulator 25. That is, each of the nine drive coils 23 is wound around each of the nine salient pole portions 24 b via each of the nine insulators 25.

  As described above, the motor 3 of this embodiment is a three-phase brushless motor, and the three driving coils 23 of the nine driving coils 23 are U-phase coils, and the remaining six drives. Three of the driving coils 23 are V-phase coils, and the remaining three driving coils 23 are W-phase coils. The U-phase coil, the V-phase coil, and the W-phase coil are arranged in this order in the circumferential direction.

  The resin sealing member 12 is provided to completely cover the drive coil 23 and protect the drive coil 23 from the fluid. The resin sealing member 12 includes a cylindrical portion 12a formed in a substantially cylindrical shape and a bottom portion 12b formed in a substantially disk shape, and is formed in a substantially bottomed cylindrical shape as a whole. The cylinder part 12a is formed in a thick, substantially cylindrical shape, and is arranged such that the axial direction of the cylinder part 12a coincides with the vertical direction. The bottom portion 12b closes the upper end of the cylindrical portion 12a. A bearing 18 is fixed to the center of the bottom surface of the bottom portion 12b.

  The resin sealing member 12 is formed of BMC (Bulk Molding Compound). In this embodiment, the resin sealing member 12 is formed by disposing the stator 6 in a mold and injecting a resin material into the mold and curing the resin material. That is, the resin sealing member 12 is integrally formed with the stator 6.

  Although the outer peripheral end portion of the lower end surface of the outer peripheral ring portion 24 a of the stator core 24, the tip end surface (radial inner surface) of the salient pole portion 24 b and the upper end side portion of the connector housing 27 are not covered with the resin sealing member 12. The other parts of the stator 6 are covered with a resin sealing member 12 (see FIGS. 1 and 2). That is, the nine drive coils 23, the nine insulators 25, and the stator core 24 are covered with the resin sealing member 12 on the upper side and the outer peripheral side (outside in the radial direction).

  The cover member 13 is a resin part formed separately from the resin sealing member 12. This cover member 13 is comprised from the cylinder part 13a formed in a substantially cylindrical shape, and the bottom part 13b formed in a substantially disc shape, and is formed in the substantially bottomed cylindrical shape as a whole. The cover member 13 is fixed to the lower end side of the resin sealing member 12. The cylinder part 13a is arrange | positioned so that the axial direction and the up-down direction of the cylinder part 13a may correspond. The cylinder portion 13a covers the lower end portion of the resin sealing member 12 from the outside in the radial direction. The bottom portion 13b closes the lower end of the cylindrical portion 13a. A through hole is formed at the center of the bottom portion 13b. The bearing 17 and the seal member 21 are fixed in the through hole.

(Configuration of terminal pins, connector housing, and connection part)
FIG. 5 is a perspective view of a part of the insulator 25 with the connector 30 shown in FIG. 6 is a perspective view showing a part of the insulator 25 with the connector 30 shown in FIG. 5 from different directions. FIG. 7 is a cross-sectional view of the insulator 25 with the connector 30 shown in FIG.

  As described above, the motor 3 is a three-phase brushless motor, and the stator 6 includes three U-phase coils, three V-phase coils, and three W-phase coils as the drive coil 23. Yes. The three U-phase coils are formed by sequentially winding one conductive wire 23a around the three salient pole portions 24b, and the three V-phase coils have three conductive wires 23a. The three W-phase coils are formed by being sequentially wound around the pole portions 24b, and the three W-phase coils are formed by sequentially winding one conductive wire 23a around the three salient pole portions 24b.

  The stator 6 constitutes a W-phase coil, a terminal pin 26 to which one end portion of a conducting wire 23a constituting a U-phase coil is connected, a terminal pin 26 to which one end portion of a conducting wire 23a constituting a V-phase coil is connected. Three terminal pins 26 are provided with a terminal pin 26 to which one end of the conducting wire 23a is connected. In this embodiment, a female connector 30 for supplying a current to the driving coil 23 is constituted by the three terminal pins 26 and the connector housing 27. A male connector (not shown) is fitted into the connector 30. In addition, the other end part of the conducting wire 23a which comprises a U-phase coil, the other end part of the conducting wire 23a which comprises a V-phase coil, and the other end part of the conducting wire 23a which comprises a W-phase coil are mutually connected.

  The terminal pin 26 is formed by bending a metal wire having a square cross section. The terminal pin 26 includes a first terminal portion 26a disposed inside the connector housing 27, a second terminal portion 26b disposed outside the connector housing 27, a first terminal portion 26a, and a second terminal portion 26b. It is comprised from the connection part 26c which connects. The terminal pin 26 may be formed by bending a metal wire having a circular cross-sectional shape.

  The 1st terminal part 26a, the 2nd terminal part 26b, and the connection part 26c are formed in linear form. The 1st terminal part 26a and the connection part 26c are connected so that it may mutually orthogonally cross. The 2nd terminal part 26b and the connection part 26c are connected so that it may mutually orthogonally cross. The first terminal portion 26a and the second terminal portion 26b extend in the same direction from the connecting portion 26c. That is, the first terminal portion 26a and the second terminal portion 26b are arranged in parallel. Moreover, as shown in FIG. 7, the shape of the terminal pin 26 is substantially U shape.

  The first terminal portion 26a and the second terminal portion 26b that are formed in a straight line are arranged so as to be parallel to the vertical direction. The connecting portion 26c connects the lower end of the first terminal portion 26a and the lower end of the second terminal portion 26b. The lower end of the first terminal portion 26a and the lower end of the second terminal portion 26b are arranged at the same position in the vertical direction, and the connecting portion 26c formed in a linear shape is arranged so as to be substantially parallel to the radial direction. ing.

  The first terminal portion 26a is connected to the radially outer end of the connecting portion 26c, and the second terminal portion 26b is connected to the radially inner end of the connecting portion 26c. The upper end of the first terminal portion 26a is disposed above the upper end of the second terminal portion 26b. The second terminal portion 26b is disposed inside the connector housing 27 in the radial direction. The 2nd terminal part 26b of this form is a linear part formed in the shape of a straight line, and arranged in parallel with the 1st terminal part 26a. In the present embodiment, the terminal pin 26 is formed by bending a metal wire having a square cross-sectional shape into a substantially U shape so that the upper side surface and the lower side surface of the connecting portion 26c are orthogonal to the vertical direction. At the same time, the terminal pin 26 is held by the connector housing 27.

  As described above, the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed. In this embodiment, the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed by insert molding in which a mold is filled with a resin in which the stator core 24 is disposed. The connecting portion 28 is integrated with the stator core 24.

  In the present embodiment, insert molding is performed on the core body composed of the strip-shaped core portion 24d and the nine salient pole portions 24b. In addition, after the insert molding, the driving coil 23 is wound around the salient pole portion 24b via the insulator 25, and then the belt-shaped core portion 24d is bent at the boundary between the outer peripheral portion 24c and the outer peripheral portion 24c. Connect the ends of 24d.

  The connector housing 27 is formed in a substantially rectangular parallelepiped box shape. The upper end of the connector housing 27 is open. That is, the connector housing 27 is formed in a substantially rectangular parallelepiped box shape whose upper surface is open. The lower end surface of the connector housing 27 is orthogonal to the vertical direction, and the inner and outer surfaces of the connector housing 27 in the radial direction are orthogonal to the radial direction. A male connector placement space 27a to be inserted into the connector 30 is formed inside the upper end side of the connector housing 27, and the male connector is inserted into the connector housing 27 from above.

  A lower portion 27b of the connector housing 27 is formed below the arrangement space 27a. The bottom portion 27b is formed with three through holes 27c in which the respective lower end portions of the first terminal portions 26a of the three terminal pins 26 are disposed (see FIG. 7). The through hole 27c penetrates the bottom portion 27b in the vertical direction. The three through holes 27c are formed in a state in which they are spaced from each other in a direction orthogonal to the vertical direction and the radial direction (hereinafter, this direction is referred to as “orthogonal direction”). That is, the three terminal pins 26 are arranged in a state of being spaced apart in the orthogonal direction.

  A guide portion 27d for guiding the connecting portion 26c is formed on the bottom surface of the bottom portion 27b (that is, the lower end surface of the connector housing 27). Specifically, as shown in FIG. 6, two convex portions 27e that protrude downward from the bottom surface of the bottom portion 27b and that are in contact with both side surfaces of the connecting portion 26c in the orthogonal direction are formed on the bottom portion 27b. A guide portion 27d is constituted by the two convex portions 27e. The guide portion 27d guides the connecting portion 26c in a substantially radial direction orthogonal to the vertical direction and the orthogonal direction.

  The upper surface of the connecting portion 26c is in contact with the lower surface of the bottom portion 27b between the two convex portions 27e. The lower surface of the connecting portion 26c is disposed above the upper end surface of the stator core 24 (see FIG. 7). In this embodiment, a meat stealing portion 27f that is recessed upward from the lower surface of the bottom portion 27b is formed on the bottom portion 27b, and the convex portion 27e is orthogonal to the vertical direction and the orthogonal direction by the meat stealing portion 27f. It is divided in a substantially radial direction.

  On the inner side surface of the connector housing 27 in the radial direction, a convex portion 27g that protrudes inward in the radial direction is formed. The convex portion 27g is formed in a rectangular parallelepiped shape elongated in the orthogonal direction. The convex portion 27g is formed at a substantially central position in the vertical direction on the inner surface in the radial direction of the connector housing 27. The radially inner side surface of the convex portion 27g is a plane perpendicular to the radial direction. The upper end portions of the three second terminal portions 26b are in contact with the convex portion 27g. Specifically, the radially outer surface of the upper end portion of the second terminal portion 26b is in contact with the radially inner surface of the convex portion 27g.

  The terminal pin 26 is attached to the connector housing 27 from the lower side of the connector housing 27. Specifically, the terminal pin 26 is attached to the connector housing 27 by inserting the first terminal portion 26 a into the through hole 27 c from below. As shown in FIG. 7, a gap is formed between the radially inner side surface of the connector housing 27 and the second terminal portion 26b below the convex portion 27g. The side surface is separated from the second terminal portion 26b.

  The connection portion 28 connects the insulator 25 and the connector housing 27 as described above. Specifically, the connection portion 28 connects the upper end side portion of the insulator 25 and the lower end side portion of the connector housing 27, and the upper end side portion of the connector housing 27 is disposed above the connection portion 28. . Further, the connection portion 28 is disposed on the inner side in the radial direction than the connector housing 27. The connection portion 28 is connected to the second cover portion 25b of the insulator 25. Specifically, the connection portion 28 is an upper portion of the second cover portion 25b and is connected to an outer portion of the second cover portion 25b in the radial direction.

  The lower surface of the radially inner end portion of the connecting portion 28 is a contact surface 28a that contacts the radially outer portion of the upper end surface of the outer peripheral ring portion 24a (see FIG. 7). That is, the connection part 28 is in contact with the upper end surface of the outer peripheral ring part 24a. The contact surface 28a is connected to the contact surface of the second cover portion 25b that contacts the radially inner portion of the upper end surface of the outer peripheral ring portion 24a and is disposed on the same plane as the contact surface.

  Moreover, the connection part 28 is contacting the upper part of the outer peripheral surface of the outer periphery ring part 24a. That is, the contact portion 28b that contacts the upper portion of the outer peripheral surface of the outer peripheral ring portion 24a is formed on the connection portion 28 (see FIG. 7). The contact surface 28b is a curved surface having a circular arc shape when viewed from above and below. The contact surface 28b is connected to the radially outer end of the contact surface 28a. Further, the contact surface 28b is formed downward from the radially outer end of the contact surface 28a.

  The connecting portion 28 is formed with a through hole 28c penetrating the connecting portion 28 in the vertical direction. The shape of the through hole 28c when viewed from the vertical direction is a rectangular shape with the orthogonal direction as the longitudinal direction. The lower part of the radially inner side surface of the connector housing 27 is the radially outer side surface of the through hole 28c. The through hole 28 c is formed below the convex portion 27 g of the connector housing 27. The width of the through hole 28c in the orthogonal direction is wider than the width of the convex portion 27g. Further, the inner side surface in the radial direction of the through hole 28c is arranged on the inner side in the radial direction from the inner side surface in the radial direction of the convex portion 27g. A lower end side portion of the second terminal portion 26b is disposed in the through hole 28c.

  Two projections 28d projecting upward are formed on the front part of the through hole 28c on the upper surface of the connection part 28. The two projecting portions 28d are formed in a state of being spaced apart in the orthogonal direction. In addition, one of the two protrusions 28d is formed from the central part of the connection part 28 in the orthogonal direction toward one side in the orthogonal direction, and the other protrusion 28d is connected in the orthogonal direction. It is formed from the center of the portion 28 toward the other side in the orthogonal direction.

  In addition, at the radially inner end of the upper surface of the connecting portion 28, two protruding portions 28e protruding upward are formed. Each of the two protrusions 28e is formed from the outer end in the circumferential direction of each of the two protrusions 25c toward the outer side in the radial direction. Two projecting portions 28f are formed on both outer sides in the orthogonal direction of the two projecting portions 28d and on the outer side in the radial direction of the projecting portion 28e. The radially inner side surface of the protrusion 28f is an inclined surface that is inclined toward the protrusion 28d as it goes outward in the radial direction. The upper end surface of the projection 25c, the upper end surface of the projection 28d, the upper end surface of the projection 28e, and the upper end surface of the projection 28f are arranged at the same position in the vertical direction.

  One end of the conducting wire 23a is fixed by soldering to the second terminal portion 26b. Specifically, the conducting wire 23a is routed along the radial inner surface of the second terminal portion 26b, and one end of the conducting wire 23a is formed on the radial inner surface of the upper portion of the second terminal portion 26b. The part is fixed by soldering. The upper portion of the second terminal portion 26b is a lead wire fixing portion 26d that is a portion to which one end portion of the lead wire 23a is fixed. The lead wire fixing portion 26d is disposed above the portion of the driving coil 23 wound around the salient pole portion 24b. Moreover, the conducting wire fixing portion 26d is disposed above the upper end surfaces of the protruding portions 25c and 28d to 28f.

  The insulator 25 in which the connector housing 27 is integrally formed is a first insulator 25, the insulator 25 adjacent to the first insulator 25 on one side in the circumferential direction is a second insulator 25, and the other side in the circumferential direction is the first insulator 25. The adjacent insulator 25 is the third insulator 25, the conductor 23a of the drive coil 23 wound around the first insulator 25 is the first conductor 23a, and the conductor of the drive coil 23 wound around the second insulator 25 is. 23a is the second conductor 23a, and the conductor 23a of the driving coil 23 wound around the third insulator 25 is the third conductor 23a. The terminal pin is arranged at the center of the three terminal pins 26 in the orthogonal direction. 26 is the first terminal pin 26 and is arranged on the second insulator 25 side in the orthogonal direction. If the terminal pin 26 to be connected is the second terminal pin 26, and the terminal pin 26 arranged on the third insulator 25 side in the orthogonal direction is the third terminal pin 26, one end portion of the first conducting wire 23 a is the first terminal pin 26. One end of the second conductor 23a is fixed to the conductor fixing part 26d of the second terminal pin 26, and one end of the third conductor 23a is fixed to the conductor fixing part of the third terminal pin 27. 26d is fixed.

  As shown in FIG. 5, the first conductor 23 a is routed so as to pass between the two protrusions 25 c of the first insulator 25 and between the two protrusions 28 d of the connection part 28. Yes. The second conducting wire 23a passes between the protruding portion 28e and the protruding portion 28f arranged on the second insulator 25 side and between the protruding portion 28f and the protruding portion 28d arranged on the second insulator 25 side. Have been drawn around. The third conducting wire 23a is routed so as to pass between the protruding portion 28e and the protruding portion 28f disposed on the third insulator 25 side and between the protruding portion 28f and the protruding portion 28d.

  The two protrusions 28 d serve to guide the first conductor 23 a to the second terminal portion 26 b of the first terminal pin 26. That is, the two projections 28 d serve to guide the lead wire of the driving coil 23 wound around the first insulator 25 to the second terminal portion 26 b of the first terminal pin 26. In this embodiment, a conductor guide portion 28g that guides the first conductor 23a to the second terminal portion 26b of the first terminal pin 26 is constituted by the two protrusions 28d. That is, the connecting portion 28 is formed with a conducting wire guide portion 28g. The interval between the two protrusions 25c of the first insulator 25 is narrower than the interval between the two protrusions 25c of the other insulators 25, and the two protrusions 25c of the first insulator 25 are also The first conducting wire 23 a is guided to the second terminal portion 26 b of the first terminal pin 26.

  The projecting portions 28 d to 28 f arranged on the second insulator 25 side serve to guide the second conductor 23 a to the second terminal portion 26 b of the second terminal pin 26. That is, the projecting portions 28 d to 28 f arranged on the second insulator 25 side guide the lead wire of the driving coil 23 wound around the second insulator 25 to the second terminal portion 26 b of the second terminal pin 26. The conductor guide portion 28h that guides the second conductor 23a to the second terminal portion 26b of the second terminal pin 26 is configured by the projections 28d to 28f arranged on the second insulator 25 side.

  Similarly, the protrusions 28 d to 28 f arranged on the third insulator 25 side serve to guide the third conductor 23 a to the second terminal portion 26 b of the third terminal pin 26. That is, the projecting portions 28 d to 28 f arranged on the third insulator 25 side guide the lead wire of the driving coil 23 wound around the third insulator 25 to the second terminal portion 26 b of the third terminal pin 26. The conductor guide portion 28h that guides the third conductor 23a to the second terminal portion 26b of the third terminal pin 26 is configured by the projections 28d to 28f arranged on the third insulator 25 side. As described above, two conductor guide portions 28 h are formed in the connection portion 28.

  As described above, the outer peripheral end portion of the lower end surface of the outer peripheral ring portion 24a of the stator core 24, the tip end surface of the salient pole portion 24b, and the upper end side portion of the connector housing 27 are not covered with the resin sealing member 12, but the stator The other part of 6 is covered with a resin sealing member 12. That is, as shown in FIG. 2, the second terminal portion 26b of the terminal pin 26 is covered with the resin sealing member 12, and below the convex portion 27g, the radially inner side surface of the connector housing 27 Part of the resin sealing member 12 is filled in the gap formed between the second terminal portion 26b. The convex portion 27 g of the connector housing 27 is also covered with the resin sealing member 12. Further, the connecting portion 26c of the terminal pin 26 is also covered with the resin sealing member 12, and the resin sealing member 12 prevents the terminal pin 26 from coming off from the connector housing 27 to the lower side.

(Main effects of this form)
As described above, in this embodiment, one end portion of the conducting wire 23a is soldered and fixed to the second terminal portion 26b of the terminal pin 26, and the conducting wire 23a is directly connected to the terminal pin 26. Therefore, in this embodiment, a wiring board for connecting the conductive wire 23a and the terminal pin 26 becomes unnecessary. Therefore, in this embodiment, the cost of the motor 3 can be reduced. Further, in this embodiment, since a wiring board is not required, a structure for fixing the wiring board is not required, and an arrangement space for the wiring board is not required. Therefore, in this embodiment, the motor 3 can be reduced in size.

  In this embodiment, the connector housing 27 is connected to the outer portion of the insulator 25 in the radial direction. Further, the second terminal portion 26b of the terminal pin 26 to which the end portion of the conducting wire 23a is fixed by soldering is disposed inside the connector housing 27 in the radial direction. Therefore, in this embodiment, even if the first terminal portion 26a of the terminal pin 26 is arranged in parallel with the vertical direction inside the connector housing 27 whose upper end is open, it is wound around the salient pole portion 24b via the insulator 25. It is possible to reduce the length of the lead wire of the driving coil 23 that has been made. Therefore, in this embodiment, the drawing operation of the lead wire of the driving coil 23 is facilitated.

  Further, in this embodiment, since the lead wire guide portions 28g and 28h for guiding the lead wire 23a to the second terminal portion 26b are formed in the connection portion 28, the lead-out operation of the driving coil 23 is more easily performed. It becomes possible.

  In the present embodiment, the second terminal portion 26b is disposed inside the connector housing 27 in the radial direction, and the lead wire fixing portion 26d, which is a portion to which the end portion of the lead wire 23a of the second terminal portion 26b is fixed, The driving coil 23 is disposed above the portion wound around the salient pole portion 24b. Therefore, in this embodiment, even if the first terminal portion 26a is arranged in parallel with the vertical direction inside the connector housing 27 whose upper end is open, the connector housing 27 is located above the insulator 25 and in the radial direction. It is possible to secure a working space for soldering the end portion of the conductive wire 23a to the second terminal portion 26b. Therefore, in this embodiment, it is possible to easily perform the soldering operation of the end portion of the conducting wire 23a to the terminal pin 26.

  In this embodiment, a convex portion 27g that protrudes inward in the radial direction is formed on the radially inner side surface of the connector housing 27, and the upper end side portion of the second terminal portion 26b is in contact with the convex portion 27g. Yes. Therefore, in this embodiment, rotation of the terminal pin 26 (specifically, rotation of the terminal pin 26 with the vertical direction being the axial direction of rotation) when soldering the end of the conductor 23a to the second terminal portion 26b and The convex portion 27g can prevent the second terminal portion 26b from bending outward in the radial direction. Further, in this embodiment, since two convex portions 27e are formed on the lower end surface of the connector housing 27 so as to contact each of both side surfaces of the connecting portion 26c in the orthogonal direction, the conductor 23a is connected to the second terminal portion 26b. The rotation of the terminal pin 26 when soldering the end portion can be prevented by the convex portion 27e. Therefore, in this embodiment, it is possible to stabilize the state of the terminal pin 26 when the end portion of the conducting wire 23a is soldered to the second terminal portion 26b. As a result, the end portion of the conducting wire 23a to the terminal pin 26 can be stabilized. This makes it possible to perform the soldering work more easily.

  In this embodiment, the inner surface in the radial direction of the connector housing 27 and the second terminal portion 26b are separated in the radial direction below the convex portion 27g of the connector housing 27. Therefore, in this embodiment, even if the upper end side portion of the second terminal portion 26b is in contact with the convex portion 27g, the connector housing 27 is caused by the heat generated when the end portion of the conducting wire 23a is soldered to the second terminal portion 26b. Can be suppressed.

  In this embodiment, the connecting portion 26c of the terminal pin 26 is covered with the resin sealing member 12, and the resin sealing member 12 prevents the terminal pin 26 from coming off from the connector housing 27 downward. Therefore, in this embodiment, it is possible to prevent the terminal pin 26 from coming off from the connector housing 27 by using the resin sealing member 12 provided to protect the driving coil 23 from the fluid. Become.

  In this embodiment, the connecting portion 28 that connects the insulator 25 and the connector housing 27 is in contact with the upper end surface of the outer peripheral ring portion 24a of the stator core 24 and is in contact with the upper portion of the outer peripheral surface of the outer peripheral ring portion 24a. For this reason, in this embodiment, it is possible to receive the force acting on the connection portion 28 at the outer peripheral ring portion 24a when an external force in the radial direction acts on the connector housing 27. Therefore, in this embodiment, the manufacturing process before the stator 6 is covered with the resin sealing member 12 (for example, the step of winding the driving coil 23 around the salient pole portion 24b, or the end of the conductive wire 23a is connected to the second terminal portion. In the step of soldering and fixing to 26b), even if an external force is applied to the connector housing 27 outward in the radial direction, damage to the connecting portion 28 can be suppressed.

  In this embodiment, the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed. In the case where the connector housing 27 and the connecting portion 28 and the insulator 25 are formed separately and the connecting portion 28 is fixed to the insulator 25, the manufacturing process before the stator 6 is covered with the resin sealing member 12 However, in this embodiment, since the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed, the stator 6 is covered with the resin sealing member 12. In the previous manufacturing process, it is possible to prevent the connector housing 27 from coming off from the insulator 25. Further, since the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed, it is easy to manage the parts before the stator 6 is assembled.

  Further, in this embodiment, the insulator 25, the connector housing 27, and the connecting portion 28 are integrally formed by insert molding in which a resin is filled in a mold in which the stator core 24 is disposed, and therefore the insulator 25, The adhesion of the connector housing 27 and the connecting portion 28 to the stator core 24 can be improved. Therefore, in this embodiment, the strength of the insulator 25, the connector housing 27, and the connection portion 28 can be increased.

  In this embodiment, a through hole 28c is formed in the connection portion 28 so as to penetrate the connection portion 28 in the vertical direction. Further, the lower portion of the radially inner side surface of the connector housing 27 is the radially outer side surface of the through hole 28c. Furthermore, the width of the through hole 28c in the orthogonal direction is wider than the width of the convex portion 27g formed on the radially inner side surface of the connector housing 27, and the side surface on the radially inner side of the through hole 28c. Are arranged on the inner side in the radial direction from the inner side surface in the radial direction of the convex portion 27g.

  For this reason, in this embodiment, even if the radially inner side surface of the connector housing 27 is formed with a protruding portion 27g that protrudes inward in the radial direction, the mold is divided into two in the vertical direction. 25, the connector housing 27 and the connecting portion 28 can be integrally formed. Therefore, in this embodiment, even if the convex portion 27g is formed on the radially inner side surface of the connector housing 27, the manufacturing cost of the insulator 25, the connector housing 27, and the connection portion 28 can be reduced.

(Modification of terminal pin)
FIG. 8 is a cross-sectional view of an insulator 25 with a connector 30 according to another embodiment of the present invention. In FIG. 8, the same code | symbol is attached | subjected to the structure same as the form mentioned above.

  In the embodiment described above, a protruding portion 26e protruding inward in the radial direction may be formed at the upper end of the second terminal portion 26b of the terminal pin 26. That is, as shown in FIG. 8, the second terminal portion 26b is formed in a straight line shape and is arranged in parallel with the first terminal portion 26a, and protrudes radially inward from the upper end of the straight portion 26f. You may be comprised from the protrusion part 26e. In this case, after the end portion of the conducting wire 23a is entangled with the protruding portion 26e, the end portion of the conducting wire 23a is soldered and fixed to the second terminal portion 26b. For example, after the end portion of the conducting wire 23a is wound once around the protruding portion 26e, the end portion of the conducting wire 23a is soldered and fixed to the second terminal portion 26b.

  In this case, the end of the conductor 23a is soldered and fixed to the upper portion of the straight portion 26f, or the end of the conductor 23a is soldered and fixed to the protruding portion 26e. Or the edge part of the conducting wire 23a is soldered and fixed to the upper part of the linear part 26f, and the protrusion part 26e. That is, in this case, the end portion of the conductive wire 23a is soldered and fixed to at least one of the upper portion of the straight portion 26f and the protruding portion 26e, and the upper portion of the straight portion 26f and the protruding portion 26e are fixed. At least one of them is a conductive wire fixing portion that is a portion to which the end of the conductive wire 23a is fixed.

  In this case, it is possible to solder the end portion of the conducting wire 23a to the second terminal portion 26b after the end portion of the conducting wire 23a is entangled with the protruding portion 26e. Therefore, it is possible to stabilize the state of the end portion of the conducting wire 23a when the end portion of the conducting wire 23a is soldered to the second terminal portion 26b. However, the configuration of the terminal pin 26 can be simplified if the second terminal portion 26b is formed linearly as in the above-described form.

(Modifications of insulator, connector housing and connecting part)
FIG. 9 is a perspective view of an insulator 25 with a connector 30 according to another embodiment of the present invention. FIG. 10 is a perspective view of the connector 30 and the insulator 25 shown in FIG. 9 in an exploded state. In FIG. 9 and FIG. 10, the same code | symbol is attached | subjected to the structure same as the form mentioned above.

  In the embodiment described above, the insulator 25, the connector housing 27, and the connection portion 28 are integrally formed. However, the connector housing 27 and the connection portion 28 are integrally formed, and the connector housing 27 and the connection portion 28 are formed. The insulator 25 may be formed separately and the connector housing 27 and the connection portion 28 may be fixed to the insulator 25. In this case, for example, as shown in FIGS. 9 and 10, the connecting portion 28 is formed with a protruding portion 28 k that protrudes inward in the radial direction. Two protrusions 28p extending to both sides in the orthogonal direction are formed at the radially inner end of the protrusion 28k. A radially outer portion of the protruding portion 28p is a recessed portion 28r that is recessed toward the inner side in the orthogonal direction.

  The protrusion 25c of the insulator 25 is fitted in the recess 28r. That is, the connection portion 28 is formed with two recesses 28r into which the two protrusions 25c are fitted. Each of the two recessed portions 28r is fitted with each of the inner end portions in the circumferential direction of the two protruding portions 25c. In this modification, the connector housing 27 and the connection portion 28 are fixed to the insulator 25 by fitting the two protrusions 25c into the two recesses 28r, respectively. In a state where the connector housing 27 and the connection portion 28 are fixed to the insulator 25, the lower surface of the radially inner end portion of the connection portion 28 is in contact with the upper end surface of the second cover portion 25b.

  In this modification, the two concave portions 28 r are connector-side engaging portions that can engage with the insulator 25. The two protrusions 25c are insulating member-side engaging portions that can be engaged with the two concave portions 28r that are the connector-side engaging portions, and each of the nine insulators 25 has an insulating member-side engaging portion. Is formed.

  In the case where the stator core 24 is a curling core, after the driving coil 23 is wound around the salient pole part 24b, the belt-like core part 24d is bent at the boundary between the outer peripheral part 24c and the outer peripheral part 24c, When connecting the end portions of 24d, it may be necessary to change the mounting position of the connector housing 27 with respect to the stator core 24 in accordance with the specifications of the motor 3 or the like. That is, it is necessary to change the winding start position and the winding end position of the driving coil 23 or the winding direction of the driving coil 23 depending on the rotation direction of the motor 3 and the power feeding timing. In some cases, the connector housing 27 may be attached at a position corresponding to the outer peripheral portion 24c disposed at the end of the strip-shaped core portion 24d shown in FIG. 4 (A), or it may correspond to the outer peripheral portion 24c disposed at the center of the strip-shaped core portion 24d. In some cases, the connector housing 27 may be attached to the position where the operation is performed.

  In this modification, the connector housing 27 and the connection portion 28 and the insulator 25 are formed separately, and two protrusions 25 c are formed on each of the nine insulators 25. Since the two recesses 28r are formed, the mounting position of the connector housing 27 with respect to the stator core 24 can be changed without changing the shape of the insulator 25. Therefore, the mounting position of the connector housing 27 with respect to the stator core 24 can be easily changed.

  Moreover, in this modification, since the connector housing 27 and the connecting portion 28 and the insulator 25 are formed separately, a plurality of types of connector housings 27 having different shapes can be attached to the common insulator 25. . Moreover, in this modification, since the connection part 28 can be attached to the insulator 25 using the two protrusion parts 25c and the two recessed parts 28r, the connection part 28 is connected to the insulator 25 with a relatively simple configuration. It becomes possible to install.

  In the example shown in FIGS. 9 and 10, the insulator 25 includes an upper insulator 35 and a lower insulator 36 that are divided into two in the vertical direction. In this case, the upper insulator 35 and the lower insulator 36 are formed separately, and the insulator 25 is not formed by insert molding. In this case, the upper insulator 35 and the lower insulator 36 are attached to the core body composed of the strip-shaped core portion 24d and the nine salient pole portions 24b, and the connector housing 27 and the connection portion 28 are connected to the insulator. 25 (specifically, the upper insulator 35) and then the driving coil 23 is wound around the salient pole portion 24b via the insulator 25, and then the belt-like core portion 24d is connected to the outer peripheral portion 24c and the outer peripheral portion 24c. The ends of the belt-like core portion 24d are connected to each other. However, in this modification, the insulator 25 may be formed by insert molding.

  In the example shown in FIGS. 9 and 10, a guide groove 28 s that guides the first conductor 23 a to the second terminal portion 26 b of the first terminal pin 26 instead of the conductor guide portion 28 g of the above-described form. It is formed on the upper surface. Further, instead of the two conductor guide portions 28h of the above-described form, a guide groove 28t for guiding the second conductor 23a to the second terminal portion 26b of the second terminal pin 26, and the third conductor 23a as the third terminal pin. A guide groove 28 t that guides to the second terminal portion 26 b of 26 is formed on the upper surface of the connection portion 28. The guide grooves 28s and 28t are formed in a rectangular groove shape that is recessed downward from the upper surface of the connection portion 28, and are also formed in a straight line shape. In the example shown in FIGS. 9 and 10, the guide grooves 28 s and 28 t are conductive wire guide portions that guide the conductive wire 23 a to the second terminal portion 26 b.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the second terminal portion 26b formed in a linear shape is arranged in parallel with the first terminal portion 26a formed in a linear shape, but the second terminal portion 26b is arranged in the first terminal portion 26a. It is not necessary to be arranged in parallel. Moreover, in the form mentioned above, the position of the lower end of the 1st terminal part 26a and the position of the lower end of the 2nd terminal part 26b may have shifted | deviated in the up-down direction.

  In the embodiment described above, the upper portion of the connector housing 27 is disposed above the insulator 25, but the entire connector housing 27 may be disposed above the insulator 25. In the embodiment described above, the entire first terminal portion 26 a is disposed inside the connector housing 27, but a part of the lower end side of the first terminal portion 26 a may be disposed outside the connector housing 27. .

  In the embodiment described above, the nine insulators 25 are not connected in the circumferential direction, but the nine insulators 9 may be connected in the circumferential direction. In the embodiment described above, the insulator 25 may be composed of an upper insulator 35 and a lower insulator 36 as in the modification examples shown in FIGS. 9 and 10. That is, in the embodiment described above, the insulator 25, the connector housing 27, and the connection portion 28 may not be formed by insert molding. In this case, the upper insulator 35, the connector housing 27, and the connection portion 28 are integrally formed.

  In the embodiment described above, the connector housing 27 may not be provided with the guide portion 27d, and the convex portion 27g may not be formed. Moreover, in the form mentioned above, the stator core 24 may be a so-called divided core formed by combining a plurality of cores divided in the circumferential direction. The stator core 24 may be an integrated annular core formed by laminating thin magnetic plates formed in an annular shape. Moreover, in the form mentioned above, although the motor 3 is used for the pump apparatus 1, the motor 3 may be used other than the pump apparatus 1.

DESCRIPTION OF SYMBOLS 1 Pump apparatus 2 Impeller 3 Motor 5 Rotor 6 Stator 12 Resin sealing member 14 Rotating shaft 15 Driving magnet 23 Driving coil 23a Conductor 24 Stator core 24a Outer peripheral ring part 24b Salient pole part 24c Outer peripheral part 24e Joint 24f Core connection part 25 Insulator (insulating member)
25c Protruding part (insulating member side engaging part)
26 terminal pin 26a 1st terminal part 26b 2nd terminal part (straight line part)
26c Connecting portion 26d Conductive wire fixing portion 26e Protruding portion 26f Linear portion 27 Connector housing 27d Guide portion 27g Protruding portion 28 Connecting portion 28c Through hole 28g, 28h Conducting guide portion 28r Concavity (connector side engaging portion)
28s, 28t guide groove (conductor guide part)
Z1 1st direction Z2 2nd direction

Claims (12)

A rotor having a driving magnet, and a stator formed in a cylindrical shape and disposed on the outer peripheral side of the rotor,
The stator includes a plurality of insulating members, a plurality of driving coils, and a stator core having a plurality of salient pole portions around which each of the plurality of driving coils is wound via each of the plurality of insulating members, A plurality of terminal pins to which end portions of the conducting wires constituting the driving coil are connected, and a connector housing holding the plurality of terminal pins;
When one of the axial directions of the rotor is a first direction and the opposite direction of the first direction is a second direction,
The connector housing is connected to an outer portion of the insulating member in the radial direction of the rotor,
At least a first direction side portion of the connector housing is disposed closer to the first direction than the insulating member,
The first direction end of the connector housing is open,
The terminal pin is formed in a straight line and is arranged in parallel with the axial direction, and at least a part of the terminal pin is arranged inside the connector housing, and a second terminal arranged outside the connector housing. A terminal portion, and a connecting portion that connects a second direction end of the first terminal portion and a second direction end of the second terminal portion,
The second terminal portion is disposed inside the connector housing in the radial direction,
In the second terminal portion, an end portion of the conducting wire is fixed by soldering,
The lead wire fixing portion, which is a portion of the second terminal portion to which the end portion of the lead wire is fixed, is disposed on the first direction side of the portion of the driving coil wound around the salient pole portion. A motor characterized by having The second terminal portion is formed by a straight portion formed in a straight line and arranged in parallel with the first terminal portion,
The motor according to claim 1, wherein a first direction side portion of the straight portion is the conductor fixing portion. The second terminal portion includes a linear portion formed in a straight line and disposed in parallel with the first terminal portion, and a protruding portion that protrudes inward in the radial direction from the first direction end side of the linear portion. And
2. The motor according to claim 1, wherein at least one of the first direction side portion of the linear portion and the protruding portion is the conductor fixing portion. On the inner side surface in the radial direction of the connector housing, a convex portion protruding toward the inner side in the radial direction is formed,
A first direction end portion of the linear portion is in contact with the convex portion,
4. The motor according to claim 2, wherein the radially inner side surface of the connector housing and the linear portion are separated on the second direction side from the convex portion. 5. The connecting portion is formed in a straight line,
5. The motor according to claim 1, wherein a guide portion that guides the connecting portion is formed on an end surface of the connector housing on the second direction side. A plurality of the drive coils, a plurality of the insulating members, and a resin-made resin sealing member that covers at least the first direction side and the outer peripheral side of the stator core;
6. The motor according to claim 1, wherein the terminal pin is prevented from coming off from the connector housing in the second direction by the resin sealing member. The stator core includes an annular outer peripheral ring portion that constitutes an outer peripheral surface of the stator core,
The plurality of salient pole portions protrude from the outer peripheral ring portion toward the inside in the radial direction,
The stator includes a connecting portion that connects the insulating member and the connector housing;
The said connection part is contacting the 1st direction side part of the outer peripheral surface of the said outer periphery ring part while contacting the end surface by the side of the 1st direction of the said outer periphery ring part, The any one of Claim 1 to 6 characterized by the above-mentioned. The motor according to Crab. The stator includes a connecting portion that connects the insulating member and the connector housing;
The motor according to any one of claims 1 to 7, wherein a conductor guide portion that guides the conductor to the second terminal portion is formed in the connection portion. The stator includes a connecting portion that connects the insulating member and the connector housing;
The insulating member, the connector housing, and the connection portion are integrally formed,
The through-hole in which the 2nd direction side part of the said 2nd terminal part is arrange | positioned while the said connection part penetrates the said connection part in the said axial direction is formed. The motor in any one of. The stator core includes an annular outer peripheral ring portion that constitutes an outer peripheral surface of the stator core,
The plurality of salient pole portions project from the outer peripheral ring portion toward the inside in the radial direction and are arranged at a constant interval in the circumferential direction of the rotor,
The outer peripheral ring portion is configured by the same number of outer peripheral portions as the plurality of salient pole portions,
The plurality of outer peripheral portions are arranged in the circumferential direction, and one salient pole portion is connected to each of the plurality of outer peripheral portions,
A joint is formed at one place on the boundary of the outer peripheral portion in the circumferential direction,
The core connection part that connects the outer ends of the outer peripheral part in the circumferential direction is formed in the remaining part of the boundary of the outer peripheral part in the circumferential direction except the one part where the joint is formed,
The stator includes a connecting portion that connects the insulating member and the connector housing;
The connector housing and the connection portion are integrally formed,
A connector-side engagement portion that can be engaged with the insulating member is formed in the connection portion,
9. The motor according to claim 1, wherein an insulating member side engaging portion capable of engaging with the connector side engaging portion is formed in each of the plurality of insulating members. The insulating member side engaging portion is two protrusions that protrude toward the first direction side of the insulating member and are disposed in a spaced state in the circumferential direction,
The motor according to claim 10, wherein the connector side engaging portion is two concave portions into which the two protruding portions are fitted.   A pump device comprising: the motor according to claim 1; and an impeller fixed to a rotation shaft of the rotor.

Images