JP6216631B2 - Armature and rotating machine - Google Patents

Description

  The present invention relates to an armature and a rotating electric machine.

  Conventionally, there is an armature provided with an armature core having an annular yoke portion and a plurality of teeth portions formed around the yoke portion. In addition, in this type of armature, the tooth portion includes a main tooth portion protruding from the yoke portion to the outside in the radial direction of the yoke portion, and a branch portion from the tip end portion of the main tooth portion along the circumferential direction of the yoke portion. Some have a pair of branched teeth portions (see, for example, Patent Document 1). In this armature, an inner layer coil portion is wound around the main teeth portion, and one branch tooth portion formed on one of the adjacent tooth portions and the other branch tooth formed on the other of the adjacent tooth portions. The outer layer coil part is wound around the part.

JP 2010-98927 A

  However, in this armature, it is difficult to wind the inner layer coil portion around the main teeth portion because the main teeth portion is located deeper than the branch teeth portion. Moreover, since the shape of the armature core is complicated because the teeth portion has the main teeth portion and the branch teeth portion, the yield of the armature core is low.

  Then, an object of this invention is to provide the armature which can wind an inner layer coil part around a main teeth part easily, and can improve the yield of an armature core, and a rotary electric machine provided with the same.

In order to achieve the above object, an armature according to claim 1 includes an annular yoke portion, a main teeth portion protruding from the yoke portion in a radial direction of the yoke portion, and a tip portion of the main teeth portion. Adjacent to an armature core having a plurality of teeth portions that are branched and arranged with a pair of branch teeth portions arranged along the circumferential direction of the yoke portion, and an inner layer coil portion wound around the main teeth portions An outer layer coil portion wound around one of the branch tooth portions formed on one of the teeth portions and the other branch tooth portion formed on the other of the adjacent teeth portions; and the branch teeth. Provided in a portion closer to the main teeth portion than the arrangement position of the outer layer coil portion in the portion, and a division portion that divides the armature core into a plurality of division members.

According to this armature, the division part is provided in the site | part of the main teeth part side rather than the arrangement position of the outer layer coil part in a branch tooth part. Accordingly, when the inner layer coil portion is wound around the main teeth portion, the split member that forms the tip side portion of the branch tooth portion from the split portion is separated from other split members including the main tooth portion and the yoke portion. By setting it as the separated state, the tip side of the main teeth portion can be opened. Thereby, since the coil | winding access from the front end side of the main teeth part to the main teeth part becomes easy, an inner layer coil part can be easily wound around the main teeth part from the front end side of the main teeth part.

  Further, even if the shape of the armature core is complicated by having the main teeth portion and the pair of branch teeth portions as the teeth portion, the armature core is divided into a plurality of divided members at the divided portion. Compared to the case where the armature core is integrally formed, the armature core can be easily manufactured. Thereby, the yield of an armature core can be improved.

An armature according to a second aspect is the armature according to the first aspect , wherein a portion of the one branch tooth portion on the tip side of the divided portion is formed by the first divided member, and the other A portion of the branching tooth portion that is more distal than the divided portion is formed by the second divided member, and the first divided member and the second divided member are integrated by an insulating member. Has been.

  According to this armature, the first divided member that forms a portion on the tip side of the divided portion in one branch tooth portion, and the second that forms a portion on the tip side of the divided portion in the other branch tooth portion. These split members are integrated by an insulating member. Therefore, compared with the case where the first and second divided members are independent from each other in a state separated from the other divided members including the main teeth portion and the yoke portion (when they are not integrated by the insulating member). In comparison, the outer layer coil portion can be easily wound around a pair of adjacent branch tooth portions.

The armature according to a third aspect is the armature according to the first or second aspect , wherein the branch tooth portion extends along a radial direction of the armature core and the outer layer coil portion is wound. Each of the divided portions is provided with a connecting portion that connects the plurality of dividing members, and the connecting portion is formed to be wider than the tip portion of the shaft portion. ing.

  According to this armature, since each divided portion is provided with a connecting portion, a plurality of divided members can be connected by this connecting portion. Moreover, this connection part is formed wider than the front-end | tip part of the axial part by which an outer layer coil part is wound in a branch tooth part. Therefore, even if a bending load is applied to the connecting portion by winding the outer layer coil portion around the shaft portion of the branching tooth portion, the connecting portion can be prevented from being damaged (buckled) by the bending load.

The armature according to claim 4 is the armature according to any one of claims 1 to 3 , wherein each of the divided portions is provided with a connecting portion that connects the plurality of divided members, A connection part is set as the structure which connects the said division members so that rotation is impossible.

  According to this armature, since each divided portion is provided with a connecting portion, a plurality of divided members can be connected by this connecting portion. Moreover, since this connection part connects division members so that rotation is impossible, an armature core can be integrated stably.

An armature according to a fifth aspect is the armature according to the fourth aspect , wherein the connecting portion includes a convex portion formed on one of the divided members connected to each other and the divided member connected to each other. And a concave portion formed on the other side into which the convex portion is press-fitted.

  According to this armature, the connecting portion has a convex portion formed on one of the divided members connected to each other and a concave portion formed on the other of the divided members connected to each other. The convex part is press-fitted. Therefore, for example, the connection strength can be easily ensured as compared with the case where the divided members are connected by welding.

The armature according to claim 6 is different from the armature according to claim 1 in that the divided portion is provided in a portion between the adjacent tooth portions in the yoke portion, A connecting portion that connects the plurality of divided members is provided, and the connecting portion is formed on one of the divided members that are connected to each other, and the convex portion that is widened toward the tip side and the divided that is connected to each other. A recess that is formed on the other side of the member and has a width that widens toward the proximal side, and the convex portion is fitted in a gap, and the tooth portion has the teeth portion with respect to the yoke portion. A press-fitting member is press-fitted from the side opposite to the protruding side.

  According to this armature, the convex portion and the concave portion are fitted into the gap, and the press-fitting member is press-fitted into the yoke portion, so that the convex portion and the concave portion are compared with the case where the convex portion and the concave portion are press-fitted. And the dimensional accuracy requested | required of a recessed part can be eased. Thereby, the yield of an armature core can be improved more.

The armature according to claim 7 is the armature according to any one of claims 1 to 6 , wherein the branch tooth portion extends from a tip portion of the main teeth portion. A bent portion extending along a circumferential direction of the armature core from a tip portion of the extension portion, and a tip surface of the bent portion is formed along an extension axis of the main teeth portion. It has been configured.

  According to this armature, the branch tooth portion has a bent portion extending along the circumferential direction of the armature core, and the jig is brought into contact with the front end surface of the bent portion, thereby The position of the split member including the bent portion is defined with reference to the front end surface of the bent portion. Therefore, variation in the position of the branch tooth portion in the circumferential direction of the armature core can be suppressed. Moreover, since the front end surface of the bent portion is formed along the extension axis of the main teeth portion, the shape of the jig can be simplified.

Note that, as in the armature according to the eighth aspect , the inner layer coil portion and the outer layer coil portion may have different wire diameters of the windings to be used. If comprised in this way, since the space which a coil | winding can wind differs in the main teeth part and the branch tooth part, the coil | winding of the wire diameter corresponding to the space is applicable.

Further, as in the armature according to claim 9 , the inner layer coil portion and the outer layer coil portion may both be made of a winding material used for aluminum.

  For example, when the inner layer coil portion is wound around the main teeth portion in a conventional integrated armature core, it is necessary to bend the winding because the access to the main teeth portion is complicated. However, since the aluminum winding has low strength, it is difficult to apply the aluminum winding to the integrated armature core.

  In this regard, according to the armature of the present invention, as described above, the winding is easily accessible to the main teeth portion, and the inner layer coil portion is wound around the main teeth portion while suppressing the bending of the winding. be able to. Therefore, like the armature according to the fifteenth aspect, both the inner layer coil portion and the outer layer coil portion can use aluminum windings. Thereby, for example, compared with the case where copper winding is used for the inner layer coil portion and the outer layer coil portion, the material cost can be reduced, so that the cost can be reduced and the weight can be reduced.

Further, as in the armature according to the tenth aspect , the inner layer coil portion and the outer layer coil portion may use different winding materials. When configured in this way, for example, a winding used for the inner layer coil portion and the outer layer coil portion, such as using an aluminum winding for the inner layer coil portion and a copper winding for the outer layer coil portion. The material can be optimally set to match the characteristics of the rotating electrical machine.

Moreover, as the rotating electrical machine according to claim 11, when provided with an armature according to any one of claims 1 to 16, since the manufacture and assembly of the armature is easy, cost Can be down.

It is a top view of the armature and press fit member concerning a first embodiment. It is a top view of the armature core shown by FIG. It is a principal part enlarged plan view of the armature core shown by FIG. It is a top view which shows the state which integrated the 1st and 2nd division member shown by FIG. 2 with the insulating member. It is a perspective view of the 1st and 2nd division member integrated by the insulating member shown by FIG. It is a principal part enlarged plan view which shows the modification of the teeth part of 1st embodiment. It is a top view which shows the armature core of 2nd embodiment. It is a top view which shows the armature core of 3rd embodiment. It is a top view which shows the armature core of 4th embodiment. It is a top view of the armature core structure part shown by FIG. It is a top view which shows the armature core and press-fit member of 5th embodiment. It is a top view which shows the armature core and shaft member of 6th embodiment. FIG. 13 is a perspective view of an armature core and a shaft member shown in FIG. 12. It is a top view which shows the armature core of 7th embodiment. It is a figure which shows the state which rotated the division member adjacent centering | focusing on the connection part shown by FIG.

[First embodiment]
First, a first embodiment of the present invention will be described.

  As shown in FIG. 1, the armature 10 according to the first embodiment of the present invention is, for example, a stator used in an outer rotor type brushless motor, and includes an armature core 12 and a plurality of inner layer coil portions 14. And a plurality of outer layer coil portions 16.

  As shown in FIG. 2, the armature core 12 has an annular yoke portion 18 and a plurality of teeth portions 20 formed around the yoke portion 18. The plurality of teeth portions 20 are formed with a main teeth portion 21 and a pair of branch teeth portions 22 and 23. The main teeth portion 21 protrudes from the yoke portion 18 to the outer side in the radial direction of the yoke portion 18, and the pair of branch teeth portions 22 and 23 are branched from the distal end portion of the main teeth portion 21 and are circumferential in the yoke portion 18. It is lined up along. As shown in FIG. 3, the pair of branch tooth portions 22 and 23 are disposed on both sides of the extension axis 24 of the main teeth portion 21. The extension axis 24 of the main teeth portion 21 is an extension line of the central axis of the main teeth portion 21 and extends along the radial direction of the armature core 12.

  More specifically, each of the branch tooth portions 22 and 23 includes an extension portion 26 extending from the tip portion of the main teeth portion 21, and the armature core 12 from the tip portion of the extension portion 26 toward the extension axis 24. And a bent portion 27 extending along the circumferential direction. More specifically, the extending part 26 has an inclined part 28 and a shaft part 29. The inclined portion 28 forms the proximal end side of the extending portion 26 and is inclined with respect to the radial direction of the armature core 12 so as to be away from the extension axis 24 toward the radially outer side of the armature core 12. Yes. The shaft portion 29 forms the distal end side of the extending portion 26, and extends along the radial direction of the armature core 12 from the distal end portion of the inclined portion 28.

  The distal end surfaces 27A of the pair of bent portions 27 formed on each tooth portion 20 are positioned on both sides with respect to the extension axis 24 and face each other in the circumferential direction of the armature core 12. Further, the front end surface 27 </ b> A of each bent portion 27 is formed along the extension axis 24.

  And each teeth part 20 has comprised the main teeth part 21 made into the said shape and a pair of branch teeth parts 22 and 23, and has comprised the substantially Y shape. Each of the teeth portions 20 is formed symmetrically about the extension axis 24. The plurality of teeth portions 20 have the same shape as each other, and are arranged around the yoke portion 18 at an equal pitch. An inner layer side slot 34 is formed between the adjacent tooth portions 20, and an outer layer side slot 36 is formed between the pair of branch tooth portions 22, 23 in each tooth portion 20.

  As shown in FIG. 1, the inner layer coil portion 14 is inserted into the inner layer side slot 34 and wound around the main teeth portion 21 by concentrated winding. Each inner layer coil portion 14 is connected to another inner layer coil portion 14 via a jumper wire, or is not connected to another inner layer coil portion 14 via a jumper wire and is independent from each other. Moreover, the terminal part of this inner layer coil part 14 is couple | bonded with a bus bar etc., or is directly connected to a control board.

  On the other hand, the outer layer coil portion 16 is inserted into the outer layer side slot 36, and one branch tooth portion 22 formed in one of the adjacent tooth portions 20 and the other one formed in the other of the adjacent tooth portions 20. It is wound over the branch tooth portion 23. More specifically, the outer layer coil portion 16 is wound around the shaft portion 29 (see FIG. 3). Each outer layer coil portion 16 is connected to another outer layer coil portion 16 via a jumper wire, or not connected to another outer layer coil portion 16 via a jumper wire, like the inner layer coil portion 14. Are independent of each other. Further, the terminal portion of the outer layer coil portion 16 is coupled to a bus bar or the like or directly connected to the control board.

  The inner layer coil portion 14 and the outer layer coil portion 16 may have the same winding material and wire diameter, or may be different from each other. As a winding material used for the inner layer coil portion 14 and the outer layer coil portion 16, for example, copper or aluminum can be appropriately selected.

  Subsequently, the above-described armature core 12 will be described in further detail. As shown in FIG. 3, a split portion 40 is provided at a position closer to the main teeth portion 21 than the arrangement position 38 of the above-described outer layer coil portion 16 (see FIG. 1) in the branch tooth portions 22 and 23. . The armature core 12 is divided into a plurality of divided members by the dividing unit 40.

  That is, as shown in FIG. 2, the armature core 12 is divided into three types of divided members 42, 43, and 44. The first divided member 42 is formed by a portion on the tip side of the divided portion 40 in one branch tooth portion 22, and the second divided member 43 is more than the divided portion 40 in the other branched tooth portion 23. It is formed by the tip side part. Further, the third split member 44 is formed by the remaining portion of the armature core 12 other than the first and second split members 42 and 43. That is, the third divided member 44 includes a portion of the pair of branch tooth portions 22 and 23 formed in each tooth portion 20 on the side of the main teeth portion 21 relative to the divided portion 40, the main teeth portion 21, and the yoke portion. 18.

  In the branch tooth portions 22 and 23 in which the above-described divided portion 40 is formed, the portion on the tip side of the divided portion 40 is “on the yoke portion side with respect to the arrangement position of the outer coil portion in the tooth portion and on the inner layer. It is an example of a "part excluding the arrangement position of the coil part".

  Each dividing portion 40 described above is provided with a connecting portion 46 that connects a plurality of dividing members 42, 43, 44. The connecting portion 46 is an example of the “connecting portion that connects the divided members so as not to rotate” in the present invention, and includes a convex portion 47 and a concave portion 48 as shown in FIG. 3. The convex portion 47 is formed in the first and second divided members 42 and 43, and the concave portion 48 is formed in the third divided member 44. The convex portion 47 has a substantially trapezoidal shape whose width increases toward the distal end side, and the concave portion 48 has a trapezoidal shape whose width increases toward the proximal end side (bottom side).

  Then, the first and second divided members 42 and 43 are connected to the third divided member 44 by press-fitting the convex portion 47 into the concave portion 48. The first and second divided members 42 and 43 are an example of “one of the divided members connected to each other” in the present invention, and the third divided member 44 is the “one of the divided members connected to each other” in the present invention. It is an example of “the other”.

  As shown in FIGS. 4 and 5, the first divided member 42 and the second divided member 43 are integrated by a resin insulating member 50 (insulator). In this insulating member 50, the portions of the first and second divided members 42 and 43 excluding the convex portion 47 are arranged in the height direction of the first and second divided members 42 and 43 (the same as the axial direction of the armature core). ) To cover from both sides. The insulating member 50 includes a first insulating part 52 that covers the first divided member 42 and a second insulating part 53 that covers the second divided member 43. A gap may not be provided between the first insulating part 52 and the second insulating part 53, and a gap may be provided. Moreover, when a clearance gap is provided between the 1st insulating part 52 and the 2nd insulating part 53, the 1st insulating part 52 and the 2nd insulating part 53 may be connected by the grid | lattice beam etc., for example.

  Although not shown in particular, the third divided member 44 shown in FIG. 2 is also provided with an insulating member, and the third divided member 44 is covered by the insulating member from both sides in the height direction. . The inner layer coil portion 14 and the outer layer coil portion 16 described above are wound around the main tooth portion 21 and the branch tooth portions 22 and 23 through these insulating members, respectively. 1-3, illustration of the insulating member is omitted.

  Then, the manufacturing method of the above-mentioned armature 10 is demonstrated. First, as shown in FIGS. 4 and 5, the first divided member 42 and the second divided member 43 are integrated by the insulating member 50. Further, an insulating member is attached to the third divided member 44 shown in FIG.

  Then, in a state where the first and second divided members 42 and 43 are separated from the third divided member 44, a winding is wound from the front end side of the main teeth portion 21 to the main teeth portion 21. Inner layer coil portion 14 (see FIG. 1) is formed in main teeth portion 21. In addition, a winding is wound around one branch tooth portion 22 and the other tooth portion 20 formed in each of the first and second divided members 42 and 43 integrated by the insulating member 50. The outer layer coil portion 16 (see FIG. 2) is formed on the pair of branch tooth portions 22 and 23.

  Further, a jig is brought into contact with the distal end surface 27A of the bent portion 27 shown in FIG. 3, and the first and second parts with respect to the third divided member 44 are referenced with respect to the distal end surface 27A of the bent portion 27. The positions of the dividing members 42 and 43 and, in turn, the positions of the branching tooth portions 22 and 23 along the circumferential direction of the yoke portion 18 are defined. And the convex part 47 each formed in the 1st and 2nd division members 42 and 43 is press-fitted in the recessed part 48 formed in the 3rd division member 44, Therefore The 1st and 2nd division member 42 is obtained. , 43 are connected to the third split member 44. The armature 10 shown in FIG. 1 is manufactured by the above procedure.

  A press-fit member 54 formed on a member for supporting the armature 10 such as a center piece is press-fitted inside the yoke portion 18 of the armature 10 manufactured as described above. A rotor 56 is disposed on the outer side in the radial direction of the armature 10, and the rotor 56 and the armature 10 constitute a rotating electrical machine 60 that is an outer rotor type brushless motor.

  Then, the effect | action and effect of 1st embodiment are demonstrated.

  As shown in FIG. 3, according to the first embodiment, the split tooth portions 22, 23 have a divided portion at a position closer to the main teeth portion 21 than the arrangement position 38 of the outer layer coil portion 16 (see FIG. 1). 40 is provided. And the 1st and 2nd division members 42 and 43 which form the part by the side of the tip rather than division part 40 in each branch teeth part 22 and 23 are the 3rd division members in which main teeth part 21 and yoke part 18 are included. In the state separated from 44, the front end side of the main teeth portion 21 can be opened. This facilitates the access of the winding from the front end side of the main teeth portion 21 to the main teeth portion 21, so that the inner layer coil portion 14 (see FIG. 1) is provided from the front end side of the main teeth portion 21 to the main teeth portion 21. It can be easily wound.

  Similarly, in a state where the first and second divided members 42 and 43 are separated from the third divided member 44 (see FIGS. 4 and 5), the distal ends and the proximal ends of the pair of branch tooth portions 22 and 23 are used. The side can be open. This facilitates the access of the winding from the distal end side or the base end side of the pair of branch tooth portions 22 and 23 to the pair of branch tooth portions 22 and 23, so that the outer layer coil portion 16 (see FIG. 1) also It can be easily wound.

  In addition, as shown in FIGS. 4 and 5, the first and second divided members 42 and 43 are integrated by an insulating member 50. Therefore, compared to the case where the first and second divided members 42 and 43 separated from the third divided member 44 are independent from each other (as compared to the case where they are not integrated by the insulating member 50). The outer layer coil portion 16 (see FIG. 1) can be easily wound around a pair of adjacent branch tooth portions 22 and 23.

  As described above, according to the first embodiment, the winding can be easily accessed to the main teeth portion 21 and the branch teeth portions 22 and 23, so that bending at the time of winding of the winding can be suppressed. As a result, it is possible to realize a high-speed operation for winding the winding and a high space factor of the winding.

  Moreover, since the 1st and 2nd division members 42 and 43 are integrated by the insulating member 50 as mentioned above, the dispersion | variation in the position at the time of the assembly in the 1st and 2nd division members 42 and 43 is carried out. As a result, the first and second divided members 42 and 43 can be prevented from coming into contact with the inner layer coil portion 14. Further, the first and second divided members 42 and 43 are integrated by the insulating member 50 as described above, whereby the outer layer coil portion 16 (see FIG. 1) is wound around the pair of branch tooth portions 22 and 23. Even in this case, it is possible to suppress the first and second split members 42 and 43 (the pair of branch tooth portions 22 and 23) from being deformed toward each other due to the tension of the outer layer coil portion 16.

  Moreover, even if the shape of the armature core 12 is complicated because the teeth portion 20 includes the main teeth portion 21 and the pair of branch teeth portions 22 and 23, the armature core 12 is divided into a plurality of portions by the dividing portion 40. Since it is divided into the members 42, 43, 44, the armature core 12 can be easily manufactured as compared with the case where the armature core 12 is integrally formed. Thereby, the yield of the armature core 12 can be improved.

  Further, as described above, the inner layer coil portion 14 (see FIG. 1) is wound around the main teeth portion 21 in a state where the first and second divided members 42 and 43 are separated from the third divided member 44. Can do. Therefore, it is not necessary to widen the gap between one branch tooth portion 22 formed on one of the adjacent tooth portions 20 and the other branch tooth portion 23 formed on the other of the adjacent tooth portions 20 ( It is not necessary to secure the width necessary for the winding for winding the inner layer coil portion 14 to pass through). For this reason, the design range of the magnetic circuit including the tip of the tooth portion 20 can be widened.

  Further, since each divided portion 40 is provided with a connecting portion 46, the first and second divided members 42 and 43 can be connected to the third divided member 44 by the connecting portion 46. Further, as shown in FIG. 3, the connecting portion 46 has a convex portion 47 and a concave portion 48. Since the convex portion 47 is press-fitted into the concave portion 48, the armature core 12 can be stably attached. Can be integrated. Further, since the convex portion 47 is press-fitted into the concave portion 48 as described above, the first and second divided members 42 and 43 and the third divided member 44 are connected, for example, by welding. Strength can be easily secured.

  Moreover, since the convex part 47 is press-fitted into the concave part 48, the first and second divided members 42 and 43 can be connected to the third divided member 44 without using a support member. Can be suppressed.

  Further, the branch tooth portions 22 and 23 have a bent portion 27 extending along the circumferential direction of the armature core 12, and the first and second divided members 42 and 43 having the bent portion 27 are When the jig is brought into contact with the distal end surface 27A of the bent portion 27, the position of the bent portion 27 relative to the third divided member 44 is defined with reference to the distal end surface 27A of the bent portion 27. Therefore, variations in the positions of the branch tooth portions 22 and 23 in the circumferential direction of the armature core 12 can be suppressed. Moreover, since the front end surface 27A of the bent portion 27 is formed along the extension axis 24 of the main teeth portion 21, the shape of the jig can be simplified.

  Further, since the armature 10 according to the first embodiment is easy to manufacture and assemble as described above, by applying the armature 10 to the rotating electric machine 60 as shown in FIG. The cost of the rotating electrical machine 60 can be reduced.

  Note that if the inner layer coil portion 14 and the outer layer coil portion 16 provided in the armature 10 have different wire diameters, the main teeth portion 21 and the branch tooth portion 22 are wound. Since the space which can be rotated is different, a winding having a wire diameter corresponding to the space can be applied.

  Further, in the inner layer coil portion 14 and the outer layer coil portion 16, if the material of the winding used is aluminum, for example, compared to the case where copper winding is used for the inner layer coil portion 14 and the outer layer coil portion 16. Thus, since the material cost can be reduced, the cost can be reduced and the weight can be reduced.

  By the way, for example, when the inner layer coil portion 14 is wound around the main teeth portion 21 in the conventional integrated armature core, it is necessary to bend the winding because the access to the main teeth portion 21 is complicated. However, since the aluminum winding has low strength, it is difficult to apply the aluminum winding to the integrated armature core 12.

  In this regard, according to the armature 10 according to the first embodiment, the winding is easily accessible to the main teeth portion 21 as described above, and the inner layer of the main teeth portion 21 is prevented from being bent. The coil part 14 can be wound. Accordingly, both the inner layer coil portion 14 and the outer layer coil portion 16 can use aluminum windings.

  On the other hand, if the material of the winding used in the inner layer coil portion 14 and the outer layer coil portion 16 provided in the armature 10 is different from each other, for example, the inner layer coil portion 14 may be made of aluminum winding, outer layer coil portion. The winding material used for the inner layer coil portion 14 and the outer layer coil portion 16 can be set to an optimum setting that matches the characteristics of the rotating electrical machine 60, such as using copper windings 16.

  Then, the modification of 1st embodiment is demonstrated.

  In the first embodiment described above, the extending portion 26 is formed with a substantially constant width over the entire length thereof, but as shown in FIG. 6, the extending portion 26 is formed on the distal end side of the shaft portion 29. It may be formed in a taper shape so that the width gradually decreases as it goes to. And thereby, the connection part 46 may be formed wider than the front-end | tip part of the axial part 29. FIG. That is, in the modification shown in FIG. 6, the width W <b> 1 of the connecting portion 46 is wider than the width W <b> 2 of the tip portion of the shaft portion 29.

  If comprised in this way, even if a bending load is added to the connection part 46 by the outer layer coil part 16 (refer FIG. 1) being wound by the axial part 29, the connection part 46 will be damaged by this bending load ( (Buckling) can be suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The second embodiment is a reference example.

  The armature core 62 in the second embodiment of the present invention shown in FIG. 7 has a configuration changed as follows with respect to the armature core 12 in the first embodiment described above. In the second embodiment, the same reference numerals are used for the same configurations as in the first embodiment.

  In the armature core 62 of the second embodiment, the dividing portion 40 is provided at a connection portion of the main tooth portion 21 with the pair of branch tooth portions 22 and 23. This division part 40 is located between the arrangement position of the inner layer coil part 14 in the teeth part 20 and the arrangement position of the outer layer coil part 16 (see FIG. 1). The armature core 62 is divided into a plurality of divided members by the dividing unit 40.

  That is, the armature core 62 is divided into two types of divided members 63 and 64. The first split member 63 is formed by a portion of the pair of branch tooth portions 22 and 23 from the split portion 40, and the second split member 64 is the main tooth portion 21 formed in each tooth portion 20. And the yoke portion 18. The plurality of divided members 63 and 64 are connected by a connecting portion 46 provided in each divided portion 40. A concave portion 48 is formed in the first divided member 63, and a convex portion 47 is formed in the second divided member 64.

  In addition, the connection site | part with a pair of branch tooth parts 22 and 23 in the main teeth part 21 in which the above-mentioned division | segmentation part 40 was formed in the yoke part side rather than the arrangement position of the outer layer coil part in a teeth part in this invention, and It is an example of a part excluding the arrangement position of the inner layer coil part. Further, the second divided member 64 in which the convex portion 47 is formed is an example of “one of the divided members connected to each other” in the present invention, and the first divided member 63 in which the concave portion 48 is formed is the book. It is an example of "the other of the divided members connected to each other" in the invention.

  Then, the content different from the above-mentioned 1st embodiment among the effect | actions and effects of 2nd embodiment is demonstrated.

  According to the second embodiment, the dividing portion 40 is provided at a connection site between the pair of branch tooth portions 22 and 23 in the main tooth portion 21. Therefore, when the inner layer coil portion 14 (see FIG. 1) is wound around the main teeth portion 21, the first split member 63 that forms a pair of branch tooth portions 22 and 23 side than the split portion 40 is provided. By making it the state isolate | separated from the 2nd division member 64 containing the main teeth part 21 and the yoke part 18, the front end side of the main teeth part 21 can be made into an open state. This facilitates the access of the winding from the front end side of the main teeth portion 21 to the main teeth portion 21, so that the inner layer coil portion 14 (see FIG. 1) is provided from the front end side of the main teeth portion 21 to the main teeth portion 21. It can be easily wound.

  Moreover, since a pair of branch teeth parts 22 and 23 are integrally formed in the 1st division member 63, for example, a division member is provided for every branch teeth parts 22 and 23 like the above-mentioned 1st embodiment. The number of members can be reduced as compared with the case where it is formed.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
The third embodiment is a reference example.

  The armature core 72 in the third embodiment of the present invention shown in FIG. 8 has a configuration changed as follows with respect to the armature core 12 in the first embodiment described above. In the third embodiment, the same reference numerals are used for the same configurations as in the first embodiment.

  In the armature core 72 of the third embodiment, the dividing portion 40 is provided at a connection portion of the yoke portion 18 with the tooth portion 20. The armature core 72 is divided into a plurality of divided members by the dividing unit 40.

  That is, the armature core 72 is divided into two types of divided members 73 and 74. The first split member 73 is formed by a portion closer to the teeth portion 20 than the split portion 40, and the second split member 74 is formed by the yoke portion 18. The plurality of divided members 73 and 74 are connected by a connecting portion 46 provided in each divided portion 40. A convex portion 47 is formed on the first split member 73, and a concave portion 48 is formed on the second split member 74.

  The first divided member 73 formed with the convex portions 47 is an example of “one of the divided members connected to each other” in the present invention, and the second divided member 74 formed with the concave portions 48 is the main one. It is an example of "the other of the divided members connected to each other" in the invention.

  Then, the content different from the above-mentioned 1st embodiment among the effect | actions and effects of 3rd embodiment is demonstrated.

  According to the third embodiment, the dividing portion 40 is provided at a connection portion of the yoke portion 18 with the tooth portion 20. Accordingly, when the inner layer coil portion 14 (see FIG. 1) is wound around the main teeth portion 21, the first divided member 73 that forms the portion closer to the teeth portion 20 than the divided portion 40 is replaced with the yoke portion 18. By making it the state isolate | separated from the 2nd division member 74 containing, the front end side and the base end side of the main teeth part 21 can be made into an open state. This facilitates the access of the winding from the distal end side or the proximal end side of the main teeth portion 21 to the main teeth portion 21, so that the inner layer coil is transferred from the distal end side or the proximal end side of the main teeth portion 21 to the main teeth portion 21. The portion 14 (see FIG. 1) can be easily wound.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described.
The fourth embodiment is a reference example.

  The armature core 82 according to the fourth embodiment of the present invention shown in FIG. 9 has a configuration changed as follows with respect to the armature core 12 according to the first embodiment described above. In the fourth embodiment, the same reference numerals are used for the same configurations as in the first embodiment.

  In the armature core 82 of the fourth embodiment, the dividing portion 40 is provided in a portion between the adjacent tooth portions 20 in the yoke portion 18 (more specifically, a central portion between the adjacent tooth portions 20). ing. The armature core 82 is divided into a plurality of divided members 84 by the dividing portion 40. The plurality of divided members 84 have the same shape as each other, and are formed by a part of the yoke portion 18 in the circumferential direction and the tooth portion 20.

  Among the plurality of divided members 84, some divided members 84 (for example, three divided members 84 arranged at equal intervals in the circumferential direction) belong to the first group (for example, U phase). As shown in FIG. 10, the plurality of divided members 84 belonging to one group are connected by a connecting member 86 (insulator) made of resin. Similarly, as shown in FIG. 9, the plurality of divided members 84 belonging to the second group (for example, V phase) are connected by another connecting member 87, and the plurality of divided members 84 belonging to the third group (for example, W phase). The divided members 84 are connected by another connecting member 88.

  In the fourth embodiment, a plurality of divided members 84 are connected by connecting members 86, 87, 88 for each of a plurality of groups, whereby a plurality of armature core components 96, 97, 98 (for example, 3 One armature core component) is configured. The armature core constituent part 96 shown in FIG. 10 is one of the plurality of armature core constituent parts. The basic configuration of the other armature core components 97 and 98 is the same as that of the armature core component 96. And the armature core 82 shown by FIG. 9 is comprised by combining these armature core structure part 96,97,98.

  Further, in the state where the armature core 82 is configured by combining the plurality of armature core components 96, 97, 98 as described above, the plurality of divided members 84 are connected to the connecting portions 46 provided in the respective divided portions 40. Are connected by Each divided member 84 is formed with a convex portion 47 and a concave portion 48. As shown in FIG. 10, the convex portion 47 is formed at one end portion of the yoke portion 18 in the circumferential direction, and the concave portion 48 is the other end portion of the yoke portion 18 in the circumferential direction. It is formed in the part.

  Then, the content different from the above-mentioned 1st embodiment among the effect | actions and effects of 4th embodiment is demonstrated.

  As shown in FIG. 9, according to the fourth embodiment, the dividing portion 40 is provided at a connection portion of the yoke portion 18 with the tooth portion 20. Therefore, when the inner layer coil portion 14 (see FIG. 1) is wound around the main teeth portion 21, the divided members 84 formed by the circumferential portion of the yoke portion 18 and the teeth portion 20 are separated from each other. By setting it as a state, the front end side and the base end side of the main teeth part 21 can be made into an open state. This facilitates the access of the winding from the distal end side or the proximal end side of the main teeth portion 21 to the main teeth portion 21, so that the inner layer coil is transferred from the distal end side or the proximal end side of the main teeth portion 21 to the main teeth portion 21. The portion 14 (see FIG. 1) can be easily wound.

  In addition, a plurality of divided members 84 are connected by connecting members 86, 87, 88 for each of a plurality of groups to form a plurality of armature core constituent parts 96, 97, 98. The armature core 82 can be configured by combining the configuration units 96, 97, and 98. Therefore, the armature core 82 can be easily assembled as compared to the case where the plurality of divided members 84 are independent from each other (as compared to the case where the connecting members 86, 87, 88 are not used).

  In the fourth embodiment, the first to third groups described above are, as an example, divided into a U phase, a V phase, and a W phase. However, in the first to third groups described above, the U phase and the V phase, respectively. Phase and W phase may be mixed.

  Further, the armature core 82 is divided into three armature core constituent parts 96, 97, 98, but the number of armature core constituent parts may be other than three.

  In the first to third groups described above, the number of division members 84 is three, but the number of division members 84 in each group may be other than three.

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described.

  The structure of the armature core 102 in the fifth embodiment of the present invention shown in FIG. 11 is changed as follows with respect to the armature core 82 in the above-described fourth embodiment. Note that in the fifth embodiment, identical symbols are used for configurations similar to those in the fourth embodiment.

  In the armature core 102 of the fifth embodiment, the convex portion 47 is formed to be slightly smaller than the concave portion 48 and is configured to fit into the concave portion 48 (fitting with a gap). Then, in a state where the convex portion 47 is fitted into the concave portion 48 and the plurality of divided members 84 are connected in an annular shape, the inside of the yoke portion 18 (the side opposite to the side where the teeth portion 20 protrudes from the yoke portion 18). By press-fitting the press-fitting member 54, the armature core 102 (the plurality of divided members 84) expands in the radial direction, and the convex portion 47 and the concave portion 48 are fitted.

  Then, the content different from the above-mentioned 4th embodiment among the effect | actions and effects of 5th embodiment is demonstrated.

  According to the fifth embodiment, the convex portion 47 and the concave portion 48 are fitted into the gap, and the press-fitting member 54 is press-fitted into the yoke portion 18. Compared with the case where the concave portion 48 is press-fitted, the dimensional accuracy required for the convex portion 47 and the concave portion 48 can be relaxed. Thereby, the yield of the armature core 102 can be further improved.

[Sixth embodiment]
Next, a sixth embodiment of the present invention will be described.

  The armature core 112 in the sixth embodiment of the present invention shown in FIG. 12 and FIG. 13 is changed in configuration as follows with respect to the armature core 102 in the fifth embodiment described above. Note that in the sixth embodiment, identical symbols are used for configurations similar to those in the fifth embodiment.

  The armature core 112 of the sixth embodiment is used for a rotor of a brushed DC motor. In the armature core 112 of the sixth embodiment, the yoke portion 18 is formed in an annular shape having a hole 113 at the center thereof, and each divided portion 40 extends along the radial direction of the yoke portion 18. Each divided portion 40 is provided with a pair of connecting portions 46 arranged in the radial direction of the yoke portion 18.

  Each connecting portion 46 has a convex portion 47 and a concave portion 48, and the direction of the convex portion 47 and the concave portion 48 is reversed in one connecting portion 46 and the other connecting portion 46. Similarly to the fifth embodiment described above, the convex portion 47 is formed to be slightly smaller than the concave portion 48 and is configured to be fitted into the concave portion 48 with a gap.

  Then, in a state where the convex portion 47 is fitted into the concave portion 48 and the plurality of divided members 84 are connected in an annular shape, the inside of the yoke portion 18 (the side opposite to the side where the teeth portion 20 protrudes from the yoke portion 18). When the shaft member 114 which is an example of the press-fitting member is press-fitted into the armature core 112 (the plurality of divided members 84) expands in the radial direction, and the convex portion 47 and the concave portion 48 are fitted. .

  Even if it is configured in this manner, the dimensions required for the convex portions 47 and the concave portions 48 compared to the case where the convex portions 47 and the concave portions 48 are press-fitted by the gap fitting between the convex portions 47 and the concave portions 48. Since the accuracy can be relaxed, the yield of the armature core 112 can be further improved.

[Seventh embodiment]
Next, a seventh embodiment of the present invention will be described.
The seventh embodiment is a reference example.

  The armature core 122 in the seventh embodiment of the present invention shown in FIGS. 14 and 15 has a configuration changed as follows with respect to the armature core 102 in the fifth embodiment described above. Note that in the seventh embodiment, identical symbols are used for configurations similar to those in the fifth embodiment.

  In the armature core 122 of the seventh embodiment, the connecting portion 46 provided in each divided portion 40 is formed on the pin portion 127 formed on one side of the adjacent divided member 84 and on the other side of the adjacent divided member 84. And a hole 128. Then, as shown in FIG. 15, when the pin portion 127 is inserted into the hole portion 128, the adjacent divided members 84 are rotatably connected.

  Then, the content different from the above-mentioned 5th embodiment among the effects | actions and effects of 7th embodiment is demonstrated.

  According to 7th embodiment, the connection part 46 provided in each division | segmentation part 40 connects the division members 84 so that rotation is possible. Accordingly, as shown in FIG. 15, for example, in a state where several divided members 84 are connected by the connecting portion 46, the several divided members are expanded in the direction in which the opening of the inner layer side slot 34 between the main teeth portions 21 expands. By rotating 84 around the connecting portion 46, the tip side of the main teeth portion 21 can be opened. This facilitates the access of the winding from the front end side of the main teeth portion 21 to the main teeth portion 21, so that the inner layer coil portion 14 (see FIG. 1) is provided from the front end side of the main teeth portion 21 to the main teeth portion 21. It can be easily wound.

[Modification]
Next, a modification common to the above embodiments will be described.

  As described above, in the first and second embodiments (see FIGS. 1 to 7), the arrangement position of the inner layer coil section 14 is excluded from the arrangement position of the outer layer coil section 16 in the tooth section 20 on the yoke section 18 side. The division part 40 is formed in the part, and the division part 40 is formed in the yoke part 18 in the third to seventh embodiments (see FIGS. 8 to 15). However, any one of the above-described first and second embodiments and any one of the third to seventh embodiments are combined, and the yoke layer 18 side and the inner layer of the tooth portion 20 are arranged on the side of the outer layer coil portion 16. The division part 40 may be formed in the part except the arrangement position of the coil part 14, and the yoke part 18, respectively.

  In the first to seventh embodiments (see FIGS. 1 to 15), the dividing portion 40 is located on the yoke portion 18 side of the tooth portion 20 relative to the arrangement position of the outer layer coil portion 16 and the arrangement position of the inner layer coil portion 14. As long as it is at least one of the portion excluding, and the yoke portion 18, it may be formed at a position other than the positions described in the above embodiments.

  Further, of the first to seventh embodiments described above, the embodiments other than the sixth embodiment are applied to the stator in the outer rotor type brushless motor, but are applied to the stator in the inner rotor type brushless motor. May be. In this case, the above-described tooth portion 20 projects toward the radially inner side of the yoke portion 18.

  In addition, the first to seventh embodiments other than the sixth embodiment may be applied to the rotor of a brushed DC motor in addition to the stator in the outer rotor type brushless motor.

  Moreover, in each said embodiment, although each main teeth part 20 was provided with one main teeth part 21 and a pair of branch teeth parts 22 and 23, it is a pair at the front-end | tip part of each branch teeth part 22 and 23. A pair of branch teeth portions similar to the branch teeth portions 22 and 23 may be further formed. Further, the number of stages of the pair of branch tooth portions formed in each tooth portion 20 (the number of the pair of branch tooth portions arranged in the radial direction of the armature core 12) may be two or more.

  Further, in each of the above-described embodiments, the dividing member in which the convex portion 47 and the concave portion 48 are formed may be reversed.

  Further, instead of the convex portion 47 and the concave portion 48, other connecting means such as welding may be used.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 ... Armature, 12 ... Armature core, 14 ... Inner layer coil part, 16 ... Outer layer coil part, 18 ... Yoke part, 20 ... Teeth part, 21 ... Main teeth part, 22 ... One branch tooth part, 23 ... Other Branch tooth portion, 24 ... extension axis, 26 ... extension portion, 27 ... bending portion, 27A ... tip surface, 28 ... tilt portion, 29 ... shaft portion, 34 ... inner side slot, 36 ... outer side slot, 38 ... Arrangement position of inner layer coil part, 40 ... Dividing part, 42 ... First dividing member, 43 ... Second dividing member, 44 ... Third dividing member, 46 ... Connecting part, 47 ... Convex part, 48 ... Concave part , 50 ... insulating member, 52 ... first insulating portion, 53 ... second insulating portion, 54 ... press-fitting member, 56 ... rotor, 60 ... rotating electric machine, 62 ... armature core, 63 ... first divided member, 64 ... 2nd division member, 72 ... Armature core, 73 ... 1st division member, 74 ... Two split members, 82 ... armature core, 84 ... split member, 86, 87, 88 ... connecting member, 96, 97, 98 ... armature core component, 102 ... armature core, 112 ... armature core, 113 ... Hole, 114 ... Shaft member (an example of a press-fit member), 122 ... Armature core, 127 ... Pin part, 128 ... Hole part

Claims (11)

An annular yoke portion, a main teeth portion projecting from the yoke portion in the radial direction of the yoke portion, and a pair of branch teeth portions branched from the tip of the main teeth portion and arranged along the circumferential direction of the yoke portion An armature core having a plurality of teeth portions formed with
An inner layer coil portion wound around the main teeth portion;
An outer coil portion wound around one of the branch teeth formed on one of the adjacent teeth and the other branch teeth formed on the other of the adjacent teeth;
A split part that is provided at a position closer to the main teeth part than an arrangement position of the outer coil part in the branch tooth part , and divides the armature core into a plurality of split members;
Armature equipped with. A portion of the one branch tooth portion on the tip side from the divided portion is formed by the first divided member,
A portion of the other branch tooth portion on the tip side of the divided portion is formed by the second divided member,
The first divided member and the second divided member are integrated by an insulating member,
The armature according to claim 1. The branch tooth portion has a shaft portion that extends along a radial direction of the armature core and around which the outer layer coil portion is wound.
Each division part is provided with a connection part for connecting the plurality of division members,
The connecting part is formed wider than the tip part of the shaft part,
The armature according to claim 1 or claim 2 . Each division part is provided with a connection part for connecting the plurality of division members,
The connecting portion connects the divided members so as not to rotate.
The armature as described in any one of Claims 1-3 . The connecting portion is
A convex portion formed on one of the divided members connected to each other;
A concave portion formed on the other of the divided members connected to each other, the convex portion being press-fitted, and
Having
The armature according to claim 4 . An annular yoke portion, a main teeth portion projecting from the yoke portion in the radial direction of the yoke portion, and a pair of branch teeth portions branched from the tip of the main teeth portion and arranged along the circumferential direction of the yoke portion An armature core having a plurality of teeth portions formed with
An inner layer coil portion wound around the main teeth portion;
An outer coil portion wound around one of the branch teeth formed on one of the adjacent teeth and the other branch teeth formed on the other of the adjacent teeth;
A split portion provided in a portion between adjacent tooth portions in the yoke portion, and splitting the armature core into a plurality of split members;
With
Each division part is provided with a connection part for connecting the plurality of division members,
The connecting portion is
A convex portion formed on one of the divided members connected to each other and having a width that increases toward the tip side;
Formed on the other of the divided members connected to each other, the width is widened toward the base end side, and the convex portion is a gap-fitted recess,
Have
A press-fitting member is press-fitted into the yoke part from the side opposite to the side from which the teeth part protrudes with respect to the yoke part.
Armature. The branch teeth portion is
An extending part extending from the tip of the main teeth part;
A bent portion extending along the circumferential direction of the armature core from the distal end portion of the extending portion;
Have
The front end surface of the bent portion is formed along the extension axis of the main teeth portion,
The armature as described in any one of Claims 1-6 . The inner layer coil part and the outer layer coil part are different from each other in the wire diameter of the windings to be used.
The armature according to any one of claims 1 to 7 . The inner layer coil portion and the outer layer coil portion are both made of aluminum as a winding material.
The armature according to any one of claims 1 to 8. The inner layer coil part and the outer layer coil part are different from each other in the winding material used,
The armature according to any one of claims 1 to 9 . The rotary electric machine provided with the armature as described in any one of Claims 1-10 .

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