JP2016077129A - Armature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armature capable of winding a winding wire around a tooth with a high space factor.SOLUTION: A stator 12 includes: a stator core 42 including a tooth 50 extending in a radial direction; a coil 24 formed by winding a conductive winding wire 22 around the tooth 50 for a plurality of layers; and an insulator 26 interposed between the stator core 42 and the coil 24. The insulator 26 includes: an insulation part 32 covering the tooth 50; and a winding wire holding projection 34 which is provided protrusively from the insulation part 32, of which the surface at an intermediate part side in the radial direction of the tooth 50 is formed as an abutment plane 34A to which the winding wire 22 forming the coil 24 is abutted, and of which the surface at a front end side in a protrusion direction is formed as an inclined plane 34B which is inclined from one side in a circumferential direction to the other side in the circumferential direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an armature.

  The following Patent Documents 1 to 5 disclose an armature and a rotating electric machine configured using the armature. Further, in general, in order to wind more windings around the tooth portion, the armature is concentratedly wound around the teeth portion on the side having a larger slot area. That is, in the inner rotor type rotating electrical machine, the winding is intensively wound on the core back side in the tooth portion, and in the outer rotor type rotating electrical machine, the winding is intensively wound on the tooth tip side in the tooth portion. Yes.

  By the way, if the winding is intensively wound on the side where the slot area is large in the tooth portion, it is considered that the winding collapses. Therefore, in the armature described in Patent Document 1 to Patent Document 5, the insulator or bobbin is provided with a flange portion for preventing displacement of the winding by engaging the winding.

JP 2011-166896 A JP 2013-21904 A JP 2014-27781 A JP 2012-124984 A JP 2011-188611 A

  However, when the above-described collar portion is provided, the last turn of the second layer interferes with the collar portion, and it is difficult to wind the winding around the teeth portion with a high space factor. Further, the space factor of the winding from the winding start end to the heel portion in the first layer is lowered.

  In view of the above facts, an object of the present invention is to obtain an armature capable of winding a winding around a tooth portion with a high space factor.

  The armature according to claim 1 is an armature core having a tooth portion extending in a radial direction, and a coil formed by winding a plurality of layers of conductive winding around the tooth portion. And an insulating portion interposed between the armature core and the coil and covering the teeth portion, and projecting from the insulating portion, and a surface of the teeth portion on the radial side forming the coil A winding holding portion which is an abutting surface against which the winding abuts and an inclined surface which is inclined as the surface on the front end side in the protruding direction goes from one circumferential side to the other circumferential side, And an insulator having the same.

  According to the armature of the first aspect, the winding of the first layer is wound by winding the winding from the one end side in the radial direction of the teeth portion along the winding holding portion. Thereafter, the winding is wound from the other end side to the one end side of the tooth portion to wind the second layer winding. Then, the winding is brought into contact with the contact surface of the winding holding portion at the radial intermediate portion of the tooth portion, and the winding of the second layer winding is completed. Thereafter, the winding is wound from one end side to the other end side of the tooth portion to wind the third and subsequent windings. Here, in the present invention, the surface on the tip side in the protruding direction of the winding holding portion is the inclined surface. That is, the height of the winding holding part in the protruding direction is gradually decreased from the one side in the circumferential direction toward the other side. This prevents excessive interference between the second layer winding and the contact surface of the winding holding portion at the end of the winding operation of the second layer winding. For this reason, it can suppress that the increase in volume of a coil | winding is prevented by the said coil | winding contacting the contact surface of a coil | winding holding | maintenance part. That is, according to the configuration of the present invention, the winding can be wound around the tooth portion with a high space factor.

  The armature according to a second aspect is the armature according to the first aspect, wherein the axial position of the end on the other circumferential side of the inclined surface is set at the same position as the axial end surface of the insulating portion. Has been.

  According to the armature of the second aspect, when the axial position of the other end in the circumferential direction of the inclined surface is set as described above, at the end of the winding work of the second layer winding The interference area between the winding and the contact surface of the winding holding part can be made narrower. That is, it is possible to further suppress the excessive interference between the second layer winding and the contact surface of the winding holding portion.

  The armature according to a third aspect is the armature according to the first or second aspect, wherein the winding holding portion has a restricting portion that restricts a position of the winding by engaging the winding. Is formed.

  According to the armature of the third aspect, when winding the first layer winding, it is possible to prevent the arrangement of the winding from collapsing. Thereby, the fall of the space factor of a coil | winding can be suppressed.

  The armature according to claim 4 is the armature according to any one of claims 1 to 3, wherein an axial height of the winding holding portion with respect to the insulating portion is the height of the coil. It is set lower than the height in the axial direction with respect to the insulating portion.

  According to the armature of the fourth aspect, the armature can be prevented from being enlarged in the axial direction by setting the height of the winding holding portion with respect to the insulating portion as described above.

It is a top view which shows typically the rotary electric machine of this embodiment. It is a top view which shows the division | segmentation core to which the insulator was attached. It is a principal part enlarged plan view which shows the mode before and behind a collar being press-fitted inside a stator core. It is the perspective view which looked at the division | segmentation core to which the insulator was attached from the yoke structure part side. It is the perspective view which looked at the division | segmentation core to which the insulator was attached from the teeth front-end | tip part side. It is a perspective view of the split core which shows the winding process of the 2nd layer. It is a perspective view of the division | segmentation core which shows the time of completion | finish of winding of the 2nd layer. It is a perspective view of the division | segmentation core which shows the time of the winding start of the 3rd layer. It is a top view corresponding to Drawing 1 showing typically a rotary electric machine of other embodiments.

  The armature and the rotating electric machine according to the 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 drawings indicate the axial direction, the radial direction, and the circumferential direction of the armature and the rotating electric machine, respectively. In addition, hereinafter, when only the axial direction, the radial direction, and the circumferential direction are indicated, the axial direction, radial direction, and circumferential direction of the armature and the rotating electric machine are indicated unless otherwise specified.

  As shown in FIG. 1, the rotating electrical machine 10 of the present embodiment is a so-called outer rotor type brushless motor. The rotating electrical machine 10 includes a stator 12 as an armature that generates a rotating magnetic field, and a stator 12. And a rotor 14 that rotates in response to the rotating magnetic field.

  The rotor 14 includes a housing 18 that is rotatably supported by a central shaft 16 and a magnet 20 that is attached to the housing 18. The housing 18 includes a cylindrical portion 18 </ b> A that extends along the stator 12 on the radially outer side of the stator 12. Further, an N-pole magnet 20N and an S-pole magnet 20S are fixed to the radially inner surface of the cylindrical portion 18A in a state of being arranged along the circumferential direction. In this embodiment, the rotor 14 is configured by fixing a plurality of N-pole magnets 20N and S-pole magnets 20S to the housing 18. However, for example, N-poles and S-poles are alternately magnetized in the circumferential direction. The rotor 14 may be configured by fixing the ring magnets to the housing 18.

  In the stator 12, a stator core 42 as an armature core formed using a magnetic material such as a steel material, and conductive windings 22 are wound around each tooth portion 50 of the stator core 42. And the insulator 26 interposed between the stator core 42 and the coil 24.

  As shown in FIGS. 2 and 3, the stator core 42 includes six divided cores 48 that are divided in the circumferential direction of the stator core 42. The plurality of split cores 48 include a tooth portion 50 extending in the radial direction, a yoke component 52 formed at the base end portion of the tooth portion 50, and a tooth tip formed at the tip portion of the tooth portion 50. Part 53. In a state in which the plurality of split cores 48 are arranged in a ring shape, the plurality of yoke constituent portions 52 form an annular yoke 54 (see FIG. 1), and the plurality of teeth portions 50 are arranged around the yoke 54. Arranged radially.

  Each of the plurality of divided cores 48 is provided with a convex engaging portion 56 and a concave engaged portion 58. The engaging portion 56 is formed on one side portion of the yoke constituting portion 52, and the engaged portion 58 is formed on the other side portion of the yoke constituting portion 52. The plurality of split cores 48 are connected in an annular shape by engaging adjacent engaging portions 56 and engaged portions 58.

  Further, as shown in FIG. 3, a constricted portion 60 is formed at the proximal end portion of the convex engaging portion 56, and an opening portion of the concave engaged portion 58 is formed at the constricted portion 60. A recess 62 corresponding to the shape is formed. The engaging portion 56 having the constricted portion 60 and the engaged portion 58 having the recessed portion 62 are formed in dimensions and shapes that can be loosely fitted to each other.

  Then, in the state where the stator core 42 is configured by connecting the plurality of split cores 48 in a ring shape as described above, a collar 90 is formed inside the stator core 42 as shown in the lower diagram of FIG. Press fit. In addition, when the collar 90 is press-fitted inside the stator core 42, the engaging portion 56 and the engaged portion 58 that are loosely fitted to each other are pulled in the circumferential direction of the stator core 42, Movement in the direction is restricted.

  As shown in FIGS. 4 and 5, the insulator 26 is formed using an insulating material such as a resin material. The insulator 26 includes a first insulator component 28 and a second insulator divided in the axial direction. 2 insulator constituent parts 30.

  The first insulator constituting portion 28 includes an insulating portion 32 that covers the tooth portion 50 and a winding holding projection 34 that serves as a winding holding portion protruding from the insulating portion 32.

  As shown in FIGS. 2, 4, and 5, the insulating portion 32 is formed in a substantially U-shaped cross section when viewed in the radial direction, and the insulating portion 32 is on one side in the axial direction of the tooth portion 50. 32 A of base wall parts extended along the surface of this, and the 1st side wall part 32B and the 2nd side wall part 32C extended along the surface of the circumferential direction one side and the other side of the teeth part 50 are provided. ing. A plurality of restricting projections 32D arranged at predetermined intervals along the radial direction are respectively formed on the base wall 32A side of the first side wall 32B and the second side wall 32C. Note that a part of the winding 22 is arranged between the pair of restricting protrusions 32D so that the movement of a part of the winding 22 in the radial direction is restricted.

  The winding holding projection 34 is provided on the inner side in the radial direction of the base wall portion 32A of the insulating portion 32, and the winding holding projection 34 is away from the tooth portion 50 with respect to the base wall portion 32A. It projects toward (toward one side in the axial direction). Further, the outer surface in the radial direction of the winding holding projection 34 is located in the intermediate portion in the radial direction of the tooth portion 50, and this surface is a contact surface 34 </ b> A with which the winding 22 forming the coil 24 contacts. It is said that. Further, the surface on one side in the axial direction of the winding holding projection 34 is an inclined surface 34B that is gradually inclined from the one side in the circumferential direction toward the other side. The height toward the one side in the axial direction with respect to the wall portion 32A gradually decreases from the one side in the circumferential direction toward the other side. In addition, the axial position of the end on the other circumferential side of the inclined surface 34B is set to the same position as the axial end face of the insulating portion 32. Furthermore, a plurality of restricting groove portions 34C as restricting portions arranged along the radial direction are formed on the inclined surface 34B. Further, as shown in FIG. 2, each regulation groove 34 </ b> C is inclined outward in the radial direction from the one side in the circumferential direction toward the other side as viewed in the axial direction. Note that a part of the winding 22 is arranged between the regulation groove portions 34C, so that the movement of a part of the winding 22 in the radial direction is regulated.

  The second insulator component 30 has the same configuration as that of the first insulator component 28 except that it does not have the winding holding projection 34. In the second insulator constituting unit 30, portions corresponding to the first insulator constituting unit 28 are denoted by the same reference numerals as the respective parts of the first insulator constituting unit 28.

  Next, the process of forming the coil 24 around the teeth portion 50 of the stator core 42 to which the insulator 26 (the first insulator component 28 and the second insulator component 30) is attached will be described.

  As shown in FIG. 2, the winding 22 is wound from the radially inner side and the circumferential one side of the tooth portion 50. Note that the position indicated by S is the winding start position of the winding 22. From this winding start position, the winding 22 is sequentially wound from the radially inner side to the outer side of the tooth portion 50 along the first side wall portion 32B, the winding holding projection portion 34, and the second side wall portion 32C of the insulating portion 32. go. When the winding 22 reaches the tooth tip 53, the first layer winding operation is completed. Further, in the present embodiment, the first-layer winding 22 is wound so as to be inclined outward in the radial direction from the circumferential side to the other side in the axial direction.

  As shown in FIG. 6, the winding 22 that has reached the tooth tip 53 is folded back and sequentially wound from the radially outer side to the inner side. That is, the second layer winding operation is performed. As shown in FIG. 7, the winding operation of the second-layer winding 22 is completed when the winding 22 comes into contact with the contact surface 34 </ b> A of the winding holding projection 34. In the present embodiment, the second-layer winding 22 is wound so as to be inclined inward in the radial direction from the one side in the circumferential direction toward the other side in the axial direction.

  Here, in the present embodiment, the height of the winding holding projection 34 toward the one side in the axial direction with respect to the base wall 32A gradually decreases from one side in the circumferential direction toward the other side. This prevents excessive interference between the second layer winding 22 and the contact surface 34A of the winding holding projection 34 at the end of the winding operation of the second layer winding 22, that is, The contact area between the second-layer winding 22 and the contact surface 34A of the winding holding projection 34 is small.

  As shown in FIG. 8, the winding 22 that has reached the contact surface 34 </ b> A of the winding holding projection 34 is folded back and sequentially wound from the radially inner side to the outer side. That is, the third layer winding operation is performed. When the winding 22 reaches the tooth tip 53, the third layer winding operation is completed. Further, in the present embodiment, the third-layer winding 22 is wound so as to be inclined outward in the radial direction from the one side in the circumferential direction toward the other side as viewed in the axial direction.

  Through the steps described above, as shown in FIG. 1, coils 24 around which the windings 22 are intensively wound are formed around each tooth portion 50 on the tooth tip portion 53 side in the tooth portion 50. Yes. Further, in the present embodiment, the axial height of the winding holding projection 34 with respect to the insulating portion 32 is lower than the axial height of the coil 24 with respect to the insulating portion 32 on the tooth tip 53 side. Is set.

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

  As shown in FIG. 1, according to the rotating electrical machine 10 of the present embodiment, when energization to the winding 22 (coil 24) is controlled by a control device (not shown), a rotating magnetic field is generated in the stator 12. And the rotor 14 rotates in response to the rotating magnetic field.

  By the way, as shown in FIGS. 6 to 8, in the present embodiment, the winding 22 is wound from the radially inner side to the outer side of the tooth portion 50 along the winding holding protrusion 34 to wind the first layer. The wire 22 is wound. Thereafter, the winding 22 is wound from the outside in the radial direction of the tooth portion 50 to the inside to wind the winding 22 of the second layer. Then, the winding 22 is brought into contact with the contact surface 34A of the winding holding projection 34 at the radial intermediate portion of the tooth portion 50, and the winding of the second layer winding is finished. Thereafter, the winding 22 is wound from the radially inner side to the outer side of the tooth portion 50 to wind the third and subsequent windings 22. Here, in this embodiment, the surface on the tip side in the protruding direction of the winding holding projection 34 is the inclined surface 34B. That is, the height of the winding holding projection 34 in the protruding direction is gradually lowered from the one side in the circumferential direction toward the other side. This prevents excessive interference between the second layer winding 22 and the contact surface 34A of the winding holding projection 34 at the end of the winding operation of the second layer winding 22. For this reason, it can suppress that the increase in the volume of the coil | winding 22 is prevented by the said coil | winding 22 contacting with the contact surface 34A of the coil | winding holding | maintenance protrusion part 34. FIG. That is, according to the configuration of the present embodiment, the winding 22 can be wound around the tooth portion 50 with a high space factor.

  In the present embodiment, the axial position of the other end in the circumferential direction of the inclined surface 34 </ b> B is set to the same position as the position of the end face on the one axial side of the insulating portion 32. As a result, the interference area between the winding 22 and the contact surface 34A of the winding holding projection 34 at the end of the winding operation of the winding 22 of the second layer can be further reduced. That is, excessive interference between the second-layer winding 22 and the contact surface of the winding holding projection 34 can be further suppressed.

  Furthermore, in the present embodiment, a part of the winding 22 is disposed between the regulation groove 34C formed on the inclined surface 34B of the winding holding projection 34 so that a part of the winding 22 has a diameter. Movement in the direction is restricted. Thereby, when winding the windings 22 of the first layer, it is possible to suppress the arrangement of the windings 22 from being collapsed, and consequently to suppress a decrease in the space factor of the windings 22. it can.

  Further, in the present embodiment, the axial height of the winding holding projection 34 with respect to the insulating portion 32 is lower than the axial height of the coil 24 with respect to the insulating portion 32 on the tooth tip 53 side. Is set. Thereby, it can suppress that the stator 12 enlarges to an axial direction, and can suppress that the rotary electric machine 10 comprised including the said stator 12 enlarges to an axial direction by extension. .

  In the present embodiment, the axial height of the winding holding projection 34 with respect to the insulating portion 32 is lower than the axial height of the coil 24 with respect to the insulating portion 32 on the tooth tip 53 side. Although the set example has been described, the present invention is not limited to this. Whether or not the height of the winding holding projection 34 in the axial direction with respect to the insulating portion 32 is set lower than the height in the axial direction of the insulating portion 32 of the coil 24 on the tooth tip 53 side. The dimensions may be set appropriately in consideration of the dimensions of the stator 12 and the rotating electrical machine, the number of turns of the coil 24, and the like.

  In the present embodiment, the example in which the regulation groove 34C is formed on the inclined surface 34B of the winding holding projection 34 has been described, but the present invention is not limited to this. Whether or not the regulation groove 34C is formed on the inclined surface 34B of the winding holding projection 34 can be appropriately set in consideration of the configuration of the flyer that winds the winding 22 and the jig that holds the split core 48, and the like. Good.

  Furthermore, in this embodiment, the example in which the axial position of the end on the other circumferential side of the inclined surface 34B is set to the same position as the position of the end face on the one axial side of the insulating portion 32 has been described. Is not limited to this. Whether or not the axial position of the end on the other circumferential side of the inclined surface 34B is set to the same position as the position of the end surface on the one axial side of the insulating portion 32 depends on the winding 22 and the contact surface 34A. The contact area may be set as appropriate.

  In the present embodiment, the present invention is applied to the rotating electrical machine 10 that is an outer rotor type brushless motor. However, the present invention is not limited to this, and the rotating electrical machine 36 that is the inner rotor type brushless motor shown in FIG. 9. The present invention can also be applied to.

  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 12 ... Stator (armature), 22 ... Winding, 24 ... Coil, 26 ... Insulator, 32 ... Insulating part, 34 ... Winding holding projection part, 34A ... Contact surface, 34B ... Inclined surface, 34C ... Restriction groove part (Regulatory part), 42 ... Stator core (armature core), 50 ... Teeth part

Claims (4)

An armature core having a teeth portion extending in a radial direction;
A coil formed by winding a plurality of conductive windings around the teeth portion;
An insulating portion that is interposed between the armature core and the coil and covers the teeth portion, and protrudes from the insulating portion, and a surface on the radially intermediate portion side of the teeth portion forms the coil. A winding holding portion that is a contact surface with which the winding contacts, and a surface on the tip side in the protruding direction that is inclined from the one side in the circumferential direction toward the other side in the circumferential direction. An insulator,
Armature equipped with.   2. The armature according to claim 1, wherein an axial position of an end on the other circumferential side of the inclined surface is set at the same position as an axial end face of the insulating portion.   3. The armature according to claim 1, wherein the winding holding portion is formed with a restricting portion that restricts a position of the winding by engaging the winding. 4.   The height in the axial direction of the winding holding part with respect to the insulating part is set lower than the height in the axial direction of the coil with respect to the insulating part. The armature according to item 1.

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