JP2015208208A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the displacement of teeth parts.SOLUTION: A brushless motor 10 comprises a stator 22 that has a stator core 38 with a plurality of teeth parts 44 arranged in a circumferential direction at an interval, and a plurality of coil parts 46 formed by winding a conductive coil 42 around the teeth parts 44. The brushless motor 10 also comprises a rotor 20 that has a rotor magnet 28 arranged so as to be opposed to the teeth parts 44, and that is rotated by a magnetic field generated by the stator 22. The brushless motor 10 further comprises a vibration suppression projection part 100 provided at one side in an axial direction, of the stator 22, and that suppresses vibration of the stator core 38 by the abutting of a part of the stator core 38.

Description

  The present invention relates to a rotating electrical machine.

  Patent Document 1 discloses a rotating electrical machine that includes a stator fixed to a housing and a rotor rotatably supported by the housing. The stator includes a stator core having a plurality of teeth portions arranged at equal intervals along the circumferential direction, and a conductive winding wound around each teeth portion of the stator core. And the coil formed by.

JP 2010-273450 A

  However, when the stator core is increased in size with the increase in size of the rotating electrical machine, it is considered that the displacement of the tooth portion due to the vibration of the rotating electrical machine increases.

  In view of the above fact, an object of the present invention is to obtain a rotating electrical machine capable of suppressing the displacement of a tooth portion.

  The rotating electrical machine according to claim 1, wherein a stator core having a plurality of tooth portions arranged at intervals along the circumferential direction, and a conductive winding wound around the tooth portions. A stator having a plurality of coils formed; a rotor having a magnet disposed opposite to the teeth portion; the rotor rotating by a magnetic field in which the stator is magnetized; and an axial direction of the stator And a vibration suppressing portion that is provided on one side and suppresses vibration of the stator core when a part of the stator core comes into contact therewith.

  According to the rotating electrical machine of the first aspect, when the vibration generated by the rotation of the rotor or the vibration input from the outside is transmitted to the stator, the stator vibrates. However, in this rotating electrical machine, the vibration of the stator core is suppressed when a part of the stator core comes into contact with the vibration suppressing portion. Thereby, the vibration of a teeth part is suppressed and by extension, the displacement of a teeth part can be suppressed. Moreover, it can suppress that the coil wound by the teeth part contact | abuts the other member which comprises a rotary electric machine by the displacement of a teeth part being suppressed.

  According to a second aspect of the present invention, in the rotating electric machine according to the first aspect, a part of the tooth portion is in contact with the vibration suppressing portion, thereby suppressing the vibration of the tooth portion.

  According to the rotating electric machine according to claim 2, by causing a part of the tooth part to abut the vibration suppressing part, the vibration of the tooth part is reduced as compared with a case where a part other than the tooth part is abutted to the vibration suppressing part. It can be effectively suppressed.

  The rotating electrical machine according to claim 3 is the rotating electrical machine according to claim 1 or 2, wherein the vibration suppressing portion is formed using a non-magnetic material.

  According to the rotating electrical machine of the third aspect, the vibration suppressing portion can prevent the magnetic path in the tooth portion from being affected.

  The rotating electrical machine according to claim 4 is the rotating electrical machine according to any one of claims 1 to 3, wherein the vibration suppressing portion includes an axially facing surface that faces the stator core in the axial direction. And a portion of the stator core abuts against the axially opposed surface to suppress vibration of the stator core.

  According to the rotating electric machine according to the fourth aspect, it is possible to suppress the vibration of the stator core in the axial direction, and thus it is possible to suppress the displacement of the teeth portion in the axial direction.

  The rotating electrical machine according to claim 5 is the rotating electrical machine according to any one of claims 1 to 4, wherein the teeth portion extends in a radial direction and the winding portion is wound around the winding. A tooth tip portion extending in a circumferential direction from a radial end of the winding portion, and the vibration suppressing portion is disposed between the one tooth tip portion and the other tooth tip portion. Has been.

  According to the rotating electric machine according to claim 5, when the winding is wound around the winding portion by arranging the vibration suppressing portion between the one tooth tip portion and the other tooth tip portion, the winding It is possible to prevent the winding work from being hindered by the vibration suppressing portion.

  The rotating electrical machine according to claim 6 is the rotating electrical machine according to any one of claims 1 to 5, wherein the vibration suppressing portion includes a circumferentially facing surface that faces the stator core in the circumferential direction. And a part of the stator core abuts against the circumferentially opposed surface to suppress vibration of the stator core.

  According to the rotary electric machine of the sixth aspect, vibrations in the circumferential direction of the stator core can be suppressed, and consequently, displacement of the teeth portion in the circumferential direction can be suppressed.

  The rotating electrical machine according to claim 7 is the rotating electrical machine according to any one of claims 1 to 6, wherein the vibration suppressing portion is inserted between the one tooth portion and the other tooth portion. Has been.

  According to the rotating electric machine according to claim 7, the vibration suppression unit functions as a positioning member of the stator core by inserting the vibration suppression unit between one tooth portion and another tooth portion. Can do.

  The rotating electrical machine according to claim 8 is the rotating electrical machine according to any one of claims 1 to 7, wherein the stator is fixed to a center piece, and the vibration suppressing portion is the stator. It is provided on a fixing member fixed to the core.

  According to the rotating electrical machine of the eighth aspect, when the vibration of the center piece is transmitted to the stator, the fixing member vibrates together with the stator core. That is, when the vibration of the center piece is transmitted to the stator, the relative position between the fixing member and the stator core is difficult to change. In this way, by providing the vibration suppressing portion on the center piece whose positional relationship with the stator core is difficult to change, the displacement of the tooth portion can be effectively suppressed.

  The rotating electrical machine according to claim 9 is the rotating electrical machine according to any one of claims 1 to 4, wherein the stator core extends in a radial direction and is disposed between the tooth portions. A plurality of auxiliary teeth portions are provided, and the vibration suppressing portion with which the auxiliary teeth portions abut is provided on one side in the axial direction of the auxiliary teeth portions.

  According to the rotating electrical machine of the ninth aspect, it is possible to give a degree of freedom to the shape and arrangement of the vibration suppressing portion by adopting a configuration in which the auxiliary tooth portion around which the winding is not wound is brought into contact with the vibration suppressing portion. .

  The rotating electrical machine according to claim 10 is the rotating electrical machine according to claim 9, wherein the stator core includes three or more auxiliary tooth portions arranged at equal intervals along a circumferential direction. The plurality of vibration suppression units that support the auxiliary teeth are arranged at equal intervals along the circumferential direction.

  According to the rotating electrical machine of the tenth aspect, by setting the arrangement of the auxiliary tooth portion and the vibration suppressing portion as described above, the vibration of the stator core can be suppressed in a well-balanced manner along the circumferential direction.

It is a sectional side view which shows the cross section which cut | disconnected the brushless motor which concerns on 1st Embodiment along the axial direction. It is a top view which shows the teeth part of a stator core. It is a side view which shows the vibration suppression projection part inserted between one teeth part and the other teeth part. It is a side view corresponding to FIG. 3 which shows the vibration suppression projection part which concerns on a 1st modification. It is a side view corresponding to FIG. 3 which shows the vibration suppression projection part which concerns on a 2nd modification. It is a side view corresponding to FIG. 3 which shows the vibration suppression projection part which concerns on a 3rd modification. It is a top view which shows the vibration suppression projection part and teeth part which concern on a 4th modification. It is an expanded sectional view which shows the cross section of the teeth part and vibration suppression protrusion part which were cut | disconnected along the AA line shown by FIG. It is a top view which shows the vibration suppression projection part and teeth part which concern on a 5th modification. It is an expanded sectional view which shows the cross section of the teeth part and vibration suppression protrusion part which were cut | disconnected along the BB line shown by FIG. It is a disassembled perspective view which decomposes | disassembles and shows the brushless motor which concerns on 2nd Embodiment. It is a plane sectional view showing a stator and a rotor. It is a sectional side view which shows the cross section of the brushless motor cut | disconnected along the line corresponding to CC line shown by FIG.

(Brushless motor according to the first embodiment)
The brushless motor according to the first embodiment of the present invention will be described with reference to FIGS. In addition, the arrow Z direction, the arrow R direction, and the arrow C direction that are appropriately shown in the drawing respectively indicate the axial direction, the radial direction, and the circumferential direction of the rotating electrical machine. In addition, hereinafter, when only the axial direction, the radial direction, and the circumferential direction are indicated, the axial direction, the radial direction, and the circumferential direction of the rotating electrical machine are indicated unless otherwise specified.

  As shown in FIG. 1, the brushless motor 10 as a rotating electrical machine according to the present embodiment includes a motor unit 12, a center piece 14, a circuit unit 16, and a back cover 18.

  The motor unit 12 includes a rotor 20 as a rotor and a stator 22 as a stator. The rotor 20 includes a celestial cylindrical rotor housing 24 and a rotor magnet 28 as a magnet fixed to the inner peripheral surface of the cylindrical portion 26 of the rotor housing 24. A concave portion 32 that is recessed toward the opening side of the rotor housing 24 is formed in the central portion of the top wall portion 30 of the rotor housing 24, and a pair of bearings 34 are accommodated inside the concave portion 32. One end 36 </ b> A of the shaft 36 is press-fitted inside the pair of bearings 34. The other end portion 36 </ b> B of the shaft 36 extends through the bottom wall of the recess 32 toward the circuit portion 16 described later.

  The stator 22 includes a stator core 38 as a stator core, an insulator 40 as a fixing member formed using an insulating material, and a plurality of windings 42. As shown in FIG. 1 and FIG. 2, the stator core 38 is formed with a plurality of teeth portions 44 arranged at equal intervals along the circumferential direction. As shown in FIG. The portion 44 has a winding portion 44A that extends in the radial direction and around which the winding 42 is wound, and a tooth tip portion 44B that extends in the circumferential direction from the radially outer end of the winding portion 44A. The insulator 40 is attached to the stator core 38 from both sides of the stator core 38 in the axial direction. The insulator 40 is attached to the winding portion covering portion 40A that covers the winding portion 44A and the end face in the axial direction of the tooth tip portion 44B. And a tip end cover portion 40B extending along. Further, the circumferential width W1 of the tip cover portion 40B is set shorter than the circumferential width W2 of the teeth tip portion 44B. Furthermore, a cutout portion 40C having a radially outer side opened is formed at a portion corresponding to the intermediate portion in the circumferential direction of the tooth tip portion 44B in the tip portion cover portion 40B.

  As shown in FIG. 1, the winding 42 is derived from the coil portion 46 as a coil formed by being wound around the winding portion 44 </ b> A of the teeth portion 44 via the insulator 40. The winding lead-out portion 48 is provided. More specifically, the winding lead portion 48 is led out from the end portion of the coil portion 46 located on the base end side of the teeth portion 44 (inner diameter side of the stator core 38) toward the radially outer side of the stator 22. Yes.

  In the present embodiment, as an example, a pair of winding lead-out portions 48 are led out toward the radially outer side of the stator 22. The winding lead portion 48 may be wired along the radial direction of the stator 22, but may not be wired along the radial direction of the stator 22. In the present embodiment, as an example, the terminal portion 48 </ b> A of the winding lead-out portion 48 is located on the radially outer side of the stator 22 relative to the stator 22.

  The end portion of the coil portion 46 located on the base end side of the teeth portion 44 (the inner diameter side of the stator core 38) is the winding start end portion or the winding end end portion of the coil portion 46. It is also a connection part between the wire lead-out part 48 and the coil part 46. In the present embodiment, as an example, the number of teeth portions 44 and coil portions 46 is twelve, and the number of winding lead-out portions 48 is twelve. The plurality of coil portions 46 constitute three phases U, V, and W, and in each phase, a pair of coil portions 46 connected in series are connected in parallel. The plurality of coil portions 46 are connected in Δ (delta) as a whole.

  An elongated guide 50 is integrally formed with the insulator 40. The guide portion 50 extends from the inner diameter portion of the insulator 40 toward the radially outer side of the stator 22. The guide portions 50 are provided in the same number as the winding lead-out portions 48 described above. Each winding lead-out portion 48 is guided toward the radially outer side of the stator 22 by the guide portion 50 in a state of being accommodated in a groove 52 formed in the guide portion 50. In addition, a vibration suppression protrusion 100 as a vibration suppression unit, which will be described in detail later, is erected on the guide unit 50.

  The center piece 14 includes a disk-shaped support portion 54 and a cylindrical press-fit portion 56. The support portion 54 faces the opening of the rotor housing 24 and is provided between the motor portion 12 and the circuit portion 16. The press-fit portion 56 protrudes from the center portion of the support portion 54 to the motor portion 12 side. The other end portion 36 </ b> B of the shaft 36 is press-fitted inside the press-fit portion 56, whereby the above-described rotor 20 is rotatably supported with respect to the support portion 54. In addition, a fitting portion 58 protruding from the inner peripheral portion of the stator core 38 is fitted to the outer peripheral portion of the press-fit portion 56, whereby the above-described stator 22 is fixed to the support portion 54.

  The circuit unit 16 is arranged side by side with the motor unit 12 in the axial direction of the motor unit 12. In the present embodiment, as an example, the circuit unit 16 is arranged side by side with the motor unit 12 with the support unit 54 interposed in the axial direction of the motor unit 12. The circuit unit 16 includes a control circuit 60, a housing member 62, and a housing cover 64.

  The control circuit 60 is disposed on the opposite side of the motor unit 12 with respect to the support unit 54. The control circuit 60 includes a circuit board 66 extending along the support portion 54, and a plurality of mounting components 68 for supplying current to the coil portion 46 described above is provided on the surface of the circuit board 66. Has been implemented.

  The housing member 62 is made of resin, and has a housing 70 that forms a side wall portion surrounding the control circuit 60. The housing 70 is formed in a square frame shape when the motor unit 12 is viewed in the axial direction. The housing 70 is assembled in close contact with the support surface 54A of the support portion 54 on the circuit portion 16 side.

  The housing cover 64 is made of iron as an example for noise countermeasures (EMC countermeasures). The housing cover 64 is formed of a substantially square plate having an outer shape substantially the same as the outer shape of the housing 70 described above. The housing cover 64 is assembled to the housing 70 from the side opposite to the support portion 54, and closes the opening of the housing 70 on the side opposite to the support portion 54. Further, an exposure hole 80 is formed on the extension axis of the above-described press-fit portion 56 in the housing cover 64, and the rear end portion 56 </ b> A of the press-fit portion 56 is exposed by this exposure hole 80.

  In addition, the housing cover 64 is assembled to the housing 70, and the housing 70 is assembled to the support portion 54, whereby the support portion 54, the housing 70, and the housing cover 64 form a circuit housing portion 86. The circuit accommodating portion 86 accommodates the control circuit 60 described above.

  The back cover 18 is formed in substantially the same size and shape as the outer shape of the support portion 54, and is assembled to the support portion 54 from the opposite side of the motor portion 12 with respect to the support portion 54. In a state where the back cover 18 is assembled to the support portion 54, the circuit portion 16 is accommodated between the back cover 18 and the support portion 54.

  Next, the vibration suppression protrusion 100 that is erected on the guide 50 of the insulator 40, which is the main part of the present embodiment, will be described.

  As shown in FIG. 3, the vibration suppression protrusion 100 protrudes from the surface on one side in the axial direction of the guide portion 50 toward the one side in the axial direction, and this vibration suppression protrusion 100 is rectangular in a radial view. A rectangular portion 102 formed in a shape, and a tapered portion 104 formed in a trapezoidal shape when viewed in the radial direction and disposed on one side in the axial direction of the rectangular portion.

  The end surfaces on one side and the other side in the circumferential direction of the rectangular portion 102 are the circumferentially facing surfaces S2 arranged to face the end surface S1 on the other side and one side in the circumferential direction of the tip end cover portion 40B of the insulator 40, respectively. ing. Further, the circumferentially facing surface S2 is in contact with the other end surface S1 and one end surface S1 in the circumferential direction of the tip cover portion 40B. Furthermore, the end surface on the one axial side of the rectangular portion 102 is an axially facing surface S4 arranged to face the end surface S3 on the other axial side at the circumferential end of the tooth tip 44B. Further, the axially facing surface S4 is in contact with the end surface S3 on the other axial side at the circumferential end of the tooth tip 44B.

  The taper portion 104 is inserted between the tooth tip portion 44B of one tooth portion 44 and the tooth tip portion 44B of the other tooth portion 44, and this taper portion 104 is located on one side in the axial direction when viewed in the radial direction. It gradually narrows as it goes. Further, end surfaces on one side and the other side in the circumferential direction of the taper portion 104 are circumferentially facing surfaces S6 disposed to face the end surfaces S5 on the other side and one side in the circumferential direction of the tooth tip portion 44B, respectively. Furthermore, circumferential direction opposing surface S6 is separated from end surface S5 on the other circumferential side and one side of tooth tip 44B.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIGS. 1 and 3, according to the brushless motor 10 of the present embodiment, the vibration generated by the rotation of the rotor 20 or the vibration input from the outside is transmitted via the center piece 14 to the stator. When transmitted to 22, the stator 22 vibrates. However, in the brushless motor 10, the teeth tip portion 44 </ b> B and the tip portion cover portion 40 </ b> B are brought into contact with the vibration suppressing projection portion 100, thereby suppressing the vibration of the stator core 38. More specifically, the circumferentially facing surface S2 of the rectangular part 102 is in contact with the end surface S1 on the other circumferential side and one side of the tip cover part 40B, and the axially facing surface S4 of the rectangular part 102 is By contacting the end surface S3 on the other side in the axial direction at the circumferential end portion of the tooth tip portion 44B, vibrations in the circumferential direction and the axial direction of the tooth portion 44 are suppressed. Further, when the tooth portion 44 vibrates in the circumferential direction, the end surface S5 on the other circumferential side and one side of the tooth tip portion 44B abuts on the circumferentially opposed surface S6 of the tapered portion 104, and the tooth portion 44 vibrates in the circumferential direction. Is suppressed. Thereby, the vibration of the teeth part 44 is suppressed, and by extension, the displacement of the teeth part 44 can be suppressed. Further, by suppressing the displacement of the tooth portion 44, it is possible to suppress the coil portion 46 of the winding 42 wound around the tooth portion 44 from coming into contact with other members constituting the brushless motor 10.

  In the present embodiment, when the vibration suppressing protrusion 100 is disposed between one tooth tip 44B and another tooth tip 44B, the winding 42 is wound around the winding 44A. In addition, it is possible to prevent the winding work of the winding 42 from being hindered by the vibration suppressing protrusion 100.

  Furthermore, in this embodiment, the vibration suppression protrusion 100 is formed using an insulating (nonmagnetic) material. Therefore, the vibration suppressing protrusion 100 can prevent the magnetic path in the tooth portion 44 from being affected.

  In the present embodiment, the vibration suppression protrusion 100 is inserted into the stator core 38 by inserting the taper portion 104 of the vibration suppression protrusion 100 between one tooth tip 44B and another tooth tip 44B. It can function as a positioning member.

  By the way, the brushless motor 10 of this embodiment is used as a blower motor of a vehicle as an example, and this brushless motor 10 is supported on the vehicle body by fixing the center piece 14 to a part of the vehicle body. When the vibration of the vehicle body is transmitted to the stator 22 via the center piece 14, the insulator 40 vibrates together with the stator core 38. That is, when the vibration of the vehicle body is transmitted to the stator 22, the relative position between the insulator 40 and the stator core 38 is difficult to change. As described above, by providing the vibration suppression protrusion 100 on the center piece 14 whose positional relationship with the stator core is difficult to change, the displacement of the tooth portion 44 can be effectively suppressed.

(Vibration suppression part which concerns on a 1st modification)
Next, the vibration suppression protrusion 106 as a vibration suppression unit according to a first modification of the above embodiment will be described with reference to FIG. In addition, about the member which has the same function as the said embodiment, or the part which has the same function, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the vibration suppression protrusion 106 according to this modification is characterized in that it does not have the tapered portion 104 (see FIG. 3) of the vibration suppression protrusion 100 of the above embodiment. Also with this configuration, the displacement of the tooth portion 44 in the circumferential direction and the axial direction can be suppressed.

(Vibration suppression unit according to the second modification)
Next, a vibration suppression protrusion 108 as a vibration suppression unit according to a second modification of the above embodiment will be described with reference to FIG. In addition, about the member which has the same function as the said embodiment, or the part which has the same function, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, the vibration suppressing projection 108 according to this modification is a second rectangular shape formed in a rectangular shape in the circumferential direction instead of the tapered portion 104 (see FIG. 3) of the above embodiment. It is characterized in that the unit 110 is provided. The circumferential width W3 of the second rectangular portion 110 is set to be narrower than the circumferential width W4 of the rectangular portion 102, and the second rectangular portion 110 has one tooth tip 44B and another tooth tip. 44B.

  In the present modification described above, the displacement of the tooth portion 44 in the circumferential direction can be further suppressed.

(Vibration suppressing part according to the third modification)
Next, a vibration suppression protrusion 112 as a vibration suppression unit according to a third modification of the embodiment will be described with reference to FIG. In addition, about the member which has the same function as the said embodiment, or the part which has the same function, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, the vibration suppressing protrusion 112 according to this modification protrudes from the surface on one side in the axial direction of the guide portion 50 toward the intermediate portion in the circumferential direction of the tooth tip 44 </ b> B. The suppression protrusion 112 is formed in a semi-cylindrical shape in which the end surface on one side in the axial direction has a semicircular shape.

  In addition, the end surface on the one axial side of the vibration suppressing protrusion 112 is an axially facing surface S7 disposed to face the surface S3 on the other axial side in the circumferential middle portion of the tooth tip 44B. Further, the axially facing surface S7 is in contact with the surface S3 on the other axial side in the circumferential intermediate portion of the tooth tip portion 44B.

  Furthermore, the end 112A on one side in the axial direction of the vibration suppression projection 112 is disposed in a notch 40C formed in the tip end cover 40B of the insulator 40, and one side in the axial direction of the vibration suppression projection 112. The end 112A is in contact with the edge 40D of the notch 40C.

  In the present modification described above, the displacement of the tooth portion 44 in the circumferential direction and the axial direction can be suppressed.

(Vibration suppressing part according to the fourth modification)
Next, a vibration suppression protrusion 114 as a vibration suppression unit according to a fourth modification of the embodiment will be described with reference to FIGS. 7 and 8. In addition, about the member which has the same function as the said embodiment, or the part which has the same function, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 7 and 8, the vibration suppression protrusion 114 according to this modification is provided along an intermediate portion in the circumferential direction of the tooth tip 44 </ b> B. It is formed in a rectangular shape with the circumferential direction as the longitudinal direction when viewed from the direction. A step 116 is formed at the end of one side in the axial direction of the vibration suppressing protrusion 114. In addition, the surface facing the one axial side of the stepped portion 116 is an axially facing surface S8 that contacts the surface S3 on the other axial side of the tooth tip portion 44B. Furthermore, the surface facing the radially inner side in the stepped portion 116 is a radially facing surface S10 that abuts on the radially outer surface S9 of the tooth tip portion 44B.

  In the present modification described above, the displacement of the tooth portion 44 in the circumferential direction and the axial direction can be suppressed.

(Vibration suppression part which concerns on a 5th modification)
Next, a vibration suppression protrusion 118 as a vibration suppression unit according to a fifth modification of the embodiment will be described with reference to FIGS. 9 and 10. In addition, about the member which has the same function as the said embodiment, or the part which has the same function, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, the vibration suppressing protrusion 118 according to this modification is characterized in that a part thereof is disposed in a concave groove 44 </ b> C formed in the tooth tip 44 </ b> B. Hereinafter, the configuration of the concave groove 44C will be described first, and then the detailed configuration of the vibration suppressing protrusion 118 will be described.

  The concave groove 44C is formed at the intermediate portion in the circumferential direction of the tooth tip portion 44B and at the other side in the axial direction, and the bottom surface S11 of the concave groove 44C has an edge formed in an arc shape when viewed in the axial direction. Yes.

  Further, the vibration suppression protrusion 118 includes a first semi-cylindrical portion 120 formed in a semi-cylindrical shape protruding from one surface in the axial direction of the guide portion 50 (see FIG. 1 and the like) toward the one axial direction. The second semi-cylindrical portion that protrudes from the end surface on one axial side of the first semi-cylindrical portion 120 toward the one axial side and is formed in a semi-cylindrical shape having a smaller diameter than the first semi-cylindrical portion 120. 122. The end surface on the one axial side of the first semi-cylindrical portion 120 is an axially facing surface S12 that contacts the surface S3 on the other axial side of the tooth tip portion 44B. In addition, the radially inner surface of the second semi-cylindrical portion 122 is a radially opposing surface S13 that contacts the bottom surface S11 of the concave groove 44C, and the end surface on one axial side of the second semi-cylindrical portion 122. Is an axially facing surface S15 that contacts the terminal surface S14 of the groove 44C.

  In the present modification described above, the displacement of the tooth portion 44 in the circumferential direction and the axial direction can be suppressed.

  Note that the number of the vibration suppressing protrusions 100, 106, 108, 112, 114, 118 described in the above embodiment and the first to fifth modifications is appropriately set in consideration of the vibration mode of the stator core 38 and the like. do it.

  Further, the portion with which the vibration suppressing portion is brought into contact may be set as appropriate in consideration of the vibration mode of the stator core 38 and the like.

(Brushless motor according to the second embodiment)
A brushless motor according to a second embodiment of the present invention will be described with reference to FIGS. In addition, about the member and part which have the same function as the said embodiment, the code | symbol same as the said embodiment is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 11, the brushless motor 130 as a rotating electrical machine according to the present embodiment includes a motor unit 12, a center piece 132, a base plate 134, and a cover 136.

  The rotor magnet 28 constituting a part of the motor unit 12 is a ring magnet formed in a cylindrical shape. The rotor magnet 28 includes an N-pole magnet unit having an N-pole on the inner surface in the circumferential direction and a circumferential direction. S-pole magnet portions whose inner surfaces are S-poles are alternately magnetized along the circumferential direction.

  As shown in FIG. 12, the stator 22 constituting a part of the motor unit 12 includes a stator core 140 as a stator core having six tooth portions 44 and six auxiliary tooth portions 138. The six auxiliary teeth 138 extend in the radial direction and are formed in a substantially rectangular shape when viewed in the axial direction, and the six auxiliary teeth 138 are arranged between the teeth 44 and are circumferential. Are arranged at equal intervals. In addition, the dimension in the circumferential direction of the end portion on the radially outer side of the auxiliary tooth portion 138 is set to be larger than the dimension in the circumferential direction of the intermediate portion in the radial direction of the auxiliary teeth portion 138.

  As shown in FIGS. 11 and 13, the center piece 132 has a pair of bearings 34 that support an intermediate portion of the shaft 36 in the axial direction fixed thereto, and an axial center portion of the stator core 140 fixed to the outer peripheral portion by press-fitting. Bearing holder portion 142, a disc portion 144 extending radially from the other end of the bearing holder portion 142 in the axial direction, and extending radially outward from the outer peripheral portion of the disc portion 144 and along the circumferential direction. And three tongue pieces 146 arranged at equal intervals. Each of the three tongue pieces 146 is provided with a vibration suppressing protrusion 148 as a vibration suppressing portion that protrudes from the surface on one side in the axial direction of the tongue piece 146 toward the one side in the axial direction. The three vibration suppressing protrusions 148 are formed in a cylindrical shape having a flat surface on one side in the axial direction, and are arranged at equal intervals along the circumferential direction. When the press-fitting of the shaft core portion of the stator core 140 into the bearing holder portion 142 is completed, as shown in FIGS. 12 and 13, the surface 138A on the other side in the axial direction of the auxiliary teeth portion 138 suppresses each vibration. The protrusion 148 is in contact with a surface 148A on one axial side. Thereby, the inclination with respect to the center piece 132 of the stator core 140 is suppressed, and the vibration with respect to the center piece 132 of the stator core 140 is suppressed. In the present embodiment, among the six auxiliary teeth 138, the three auxiliary teeth 138 arranged at intervals of 120 deg along the circumferential direction are in contact with the three vibration suppression protrusions 148, respectively. It has become.

  As shown in FIG. 11, the base plate 134 is formed in a disc shape whose axial direction is the thickness direction, and the disc portion 144 of the center piece 132 and the tongue are formed on the axial center portion of the base plate 134. A support hole 150 that is an inner edge with respect to the shape of the outer edge of the piece 146 is formed. Then, the disc portion 144 and the tongue piece portion 146 of the center piece 132 are disposed in the support hole 150, whereby the position of the center piece 132 in the circumferential direction with respect to the base plate 134 is regulated.

  According to the brushless motor 130 according to the present embodiment described above, the shape of the vibration suppression projection 148 is reduced by adopting a configuration in which the auxiliary tooth portion 138 around which the winding 42 is not wound is brought into contact with the vibration suppression projection 148. A degree of freedom can be given to the arrangement.

  In the present embodiment, the center piece of the stator core 140 is well balanced in the circumferential direction by setting the arrangement of the vibration suppressing protrusion 148 and the auxiliary tooth portion 138 with which the vibration suppressing protrusion 148 abuts as described above. The inclination with respect to 132 can be suppressed. Further, by suppressing the inclination of the stator core 140 with respect to the center piece 132, it is possible to suppress the generation of abnormal noise during the operation of the brushless motor 130.

  Furthermore, in this embodiment, the auxiliary tooth portion 138 is brought into contact with the vibration suppressing projection portion 148, whereby the inclination of the stator core 140 with respect to the center piece 132 can be kept within a predetermined dimensional tolerance. Therefore, the stator core 140 can be quickly and cost-effectively compared with the case where the inclination of the stator core 140 with respect to the center piece 132 falls within a predetermined dimensional tolerance by only press-fitting the shaft core portion of the stator core 140 into the bearing holder portion 142. It is possible to keep the inclination with respect to the center piece 132 within a predetermined dimensional tolerance.

  In the present embodiment, an example in which three vibration suppression protrusions 148 are provided has been described, but the present invention is not limited to this. For example, two or single vibration suppression protrusions 148 may be provided, and the auxiliary teeth 138 may be in contact with the vibration suppression protrusions 148. The number of auxiliary teeth 138 may be set as appropriate in consideration of the output characteristics of the brushless motor 130 and the like.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 ... Brushless motor (rotary electric machine), 20 ... Rotor (rotor), 22 ... Stator (stator), 28 ... Rotor magnet (magnet), 38 ... Stator core (stator core), 42 ... Winding, 44B ... Teeth Tip part 44 ... Teeth part 44A ... Winding part 46 ... Coil part (coil) 100 ... Vibration suppression projection part (vibration suppression part) 106 ... Vibration suppression projection part (vibration suppression part) 108 ... Vibration suppression Projection (vibration suppression unit), 112 ... Vibration suppression projection (vibration suppression unit), 114 ... Vibration suppression projection (vibration suppression unit), 118 ... Vibration suppression projection (vibration suppression unit), 130 ... Brushless motor (rotation) Electric machine), 140 ... Stator core (stator core), 148 ... Vibration suppression protrusion (vibration suppression part), S4 ... Axial facing surface, S6 ... Circumferentially facing surface, S7 ... Axial facing surface, S8 ... Axial direction Facing surfaces, S12 ... axial facing surface, S15 ... axial facing surface

Claims (10)

A stator core having a plurality of teeth portions arranged at intervals along the circumferential direction, and a plurality of coils formed by winding conductive windings around the teeth portions. A stator having,
A rotor having a magnet disposed opposite to the teeth portion, the rotor rotating by a magnetic field in which the stator is magnetized, and
A vibration suppressing portion that is provided on one side in the axial direction of the stator and suppresses vibration of the stator core by contacting a part of the stator core;
Rotating electric machine with   The rotating electrical machine according to claim 1, wherein a part of the tooth portion is in contact with the vibration suppressing portion to suppress vibration of the tooth portion.   The rotating electrical machine according to claim 1, wherein the vibration suppressing portion is formed using a nonmagnetic material. The vibration suppression unit includes an axially facing surface that faces the stator core in the axial direction,
4. The rotating electrical machine according to claim 1, wherein a part of the stator core abuts against the axially opposed surface to suppress vibration of the stator core. 5. The teeth portion has a winding portion that extends in the radial direction and the winding is wound thereon, and a teeth tip portion that extends in a circumferential direction from a radial end of the winding portion,
The rotating electrical machine according to any one of claims 1 to 4, wherein the vibration suppressing portion is disposed between one tooth tip and another tooth tip. The vibration suppression unit includes a circumferentially opposed surface that faces the stator core in the circumferential direction,
The rotating electrical machine according to any one of claims 1 to 5, wherein a part of the stator core is in contact with the circumferentially opposed surface to suppress vibration of the stator core.   The rotating electrical machine according to any one of claims 1 to 6, wherein the vibration suppressing portion is inserted between one tooth portion and another tooth portion. The stator is fixed to a center piece;
The rotating electrical machine according to any one of claims 1 to 7, wherein the vibration suppressing unit is provided on a fixing member fixed to the stator core. The stator core includes a plurality of auxiliary teeth extending in the radial direction and disposed between the teeth.
The rotating electrical machine according to any one of claims 1 to 4, wherein the vibration suppressing portion with which the auxiliary tooth portion comes into contact is provided on one side in the axial direction of the auxiliary tooth portion. The stator core includes three or more auxiliary teeth portions arranged at equal intervals along the circumferential direction,
The rotating electrical machine according to claim 9, wherein the plurality of vibration suppressing portions that support three or more auxiliary tooth portions are arranged at equal intervals along a circumferential direction.