JP2006101598A - Armature of rotary electric machine and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armature of rotary electric machine and a manufacturing method for an armature wherein overlapping of crossover lines are avoided that may cause short-circuit failure and contact between a fusing electrode and winding that may cause junction failure, a commutator can be re-press fit, and the overall length of a motor is reduced by re-press fitting. <P>SOLUTION: Regular winding is carried out to wind wires in slots 24b astride teeth 24c by an amount equivalent to a number of turns. Thereafter, dummy winding is carried out to wind wires so that they are connected to the wires of regular winding and the opening angle is acute between two crossover lines 28a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an armature for a rotating electrical machine and a method for manufacturing the armature.

  Conventionally, as an armature of a rotating electrical machine in which the axial direction of the rotating shaft is flattened and a method for manufacturing the armature, for example, the one described in Patent Document 1 is known. This armature has a multi-pole stator (stator) magnetic field, a multi-slot rotor core, and a length in the axial direction of the motor to reduce the size and output of a motor with a brush (current supply terminal). It is shortened to achieve flattening (shortening of the total motor length).

  And manufacture of such an armature was performed by the following methods, for example. First, a rotor core and a commutator (commutator) are mounted on a shaft (rotary shaft) so as to be aligned in the axial direction with a relatively wide interval. Next, a winding is wound around the slot of the rotor core. At this time, the winding is locked to the connection claws (connection portions) of the commutator segment. Then, a so-called fusing process is performed in which electrical connection of the winding to the commutator segment is performed by welding by energization. Thereafter, the rotor core or commutator is moved and positioned so that the rotor core and the commutator are not substantially spaced apart.

  As described above, after the interval between the rotor core and the commutator is relatively widened by the temporary mounting process, the winding process is performed to secure a space necessary for the winding work and to properly wind the winding. It becomes possible to do. Then, after the winding process, the positioning process (recompression of the commutator) is performed again in the direction of narrowing the space between the rotor core and the commutator, so that the flattening is finally achieved.

  As a winding method of such an armature, for example, there is a winding method shown in FIG. The rotor core 121 of this armature is provided with 19 teeth 124c arranged at equiangular intervals along the circumferential direction, and slots 124b are formed between the teeth 124c. Here, in order to distinguish the 19 teeth 124c, the teeth numbers are defined as first to 19th teeth 124c. Further, in order to distinguish the 19 segments 129 from each other, the segment numbers are defined as the first to 19th segments 129. Here, for convenience of explanation of the winding method, a part of all windings is shown. In this case, the pitch of the segments 129 connecting the winding portions 128 (segment pitch) is “1: 7”, and the coil pitch of the winding portions 128 is “1: 4”. The segment pitch “1: 7” represents the relative position of the segment 129 connecting the winding part 128. The winding part 128 is connected to the two segments 129, and when the segment 129 that starts winding is the first, the end of winding is the seventh segment 129. The coil pitch “1: 4” relatively represents the slot position of one coil piece and the slot position of the other coil piece. The slot 124b in which the one coil piece is arranged is the first, and the slot This shows that the other coil piece is arranged in the fourth slot 124b counting from 124b.

Here, a conventional winding method will be briefly described. The winding portion 128 formed between the first segment 129 and the seventh segment 129 is centered on the fourth tooth 124c disposed approximately in the middle between the first segment 129 and the seventh segment 129. The coil pitch is formed by 3 slots. First, one end of the winding part 128 is connected to the first segment 129 (start), and the winding part 128 is passed between the second tooth 124c and the third tooth 124c, and the fifth tooth 124c and the sixth tooth 124c. Pass between. This is wound for the number of turns (main winding process). Then, the seventh segment 129 is connected. Hereinafter, this winding method is repeated for all the segments 129.
JP 2002-142396 A

  By the way, in the case of the multi-slot rotor core as described in Patent Document 1, the interval between the commutator segments is narrow, and particularly in the case of wave winding (mounting connection), as shown in FIG. The windings locked to the segments intersect each other in the vicinity of the commutator. And since it removes to the rotor core side rather than the point where the film | membrane of a coil | winding cross | intersects by a fusing process, an adjacent commutator segment short-circuits easily and it becomes easy to become a short circuit defect of a rotor core.

  Further, for example, when the connection is multiplied by α by wave winding, as shown in FIG. 16, since the connecting wire portion 128a of the winding 128 passes over the connection claw 129a, the connection claw 129a by the fusing electrode is used during the fusing process. Insufficient pressure. In addition, since the contact between the fusing electrode and the connection claw 129a is not suitably performed, the crossover portion 128a and the connection claw 129a are not suitably welded, and a poor connection is likely to occur. Moreover, since the crossover portion 128a protrudes toward the rotor core when the commutator is re-pressed, the crossover portion 128a contacts the rotor core and is bent in the direction opposite to the press-fit direction, and the winding may be disconnected. is there.

  Alternatively, if the long α winding (the connection is multiplied by α and the crossover portion after connection is wound around the shaft), the crossover between the crossover portions of adjacent commutator segments can be separated from the connection portion, but the shaft It becomes impossible to re-press the commutator with the winding wound around.

  The present invention has been made in view of the above circumstances, and its purpose is to avoid the overlapping of the crossover portions that cause a short circuit failure and the contact between the fusing electrode and the winding that cause a joint failure. Another object of the present invention is to provide an armature for a rotating electrical machine and a method for manufacturing the armature that enables recompression of the commutator and shortens the overall length of the motor by re-pressing.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a rotor core in which a rotating shaft and a plurality of teeth are provided along the circumferential direction and are provided with slots between the teeth. And a rotor core. The commutator in which the rotating shaft is press-fitted and a plurality of segments are provided along the circumferential direction, and a connecting portion for connecting a winding is formed in each segment, and the teeth are wound around the teeth. A winding part, and after winding the winding part, in the armature of the rotating electrical machine in which a commutator is re-pressed in the axial direction of the rotating shaft with respect to the rotor core, the winding part is Two crossovers connected to the segment of the commutator, a main winding wound around the teeth for the number of turns, and the two crossovers connected to the main winding The angle between the parts is sharp And gist that a dummy winding portion wound around the so that.

  The invention according to claim 2 is the armature of the rotating electrical machine according to claim 1, wherein the two crossover portions are a first crossover portion connected to the segment and a second crossover wire. The dummy winding portion is connected to at least one of the first crossover portion and the second crossover portion.

  According to a third aspect of the present invention, in the armature for a rotating electrical machine according to the first or second aspect, the dummy winding portion has a slot pitch of the dummy winding portion wider than a slot pitch of the main winding portion. The gist is that it was formed.

  According to a fourth aspect of the present invention, in the armature of the rotating electrical machine according to any one of the first to third aspects, the current direction of the dummy winding portion flowing into the brush as a current supply terminal is a forward direction. The gist is that it was wound like this.

The gist of the invention according to claim 5 is that the connection of the segments is a mountain connection in the armature of the rotating electrical machine according to any one of claims 1 to 4.
According to a sixth aspect of the present invention, a rotating shaft, a rotor core attached to the rotating shaft and formed with a plurality of teeth and slots, and an axial direction of the rotating shaft are press-fitted into the rotor core. Of the armature in which the commutator is re-press-fitted in the axial direction of the rotation shaft with respect to the rotor core after the winding portion is wound. In the manufacturing method, the winding portion includes two crossover portions connected to the segment of the commutator, and the winding step winds the winding for a number of turns across the teeth. And a dummy winding step of winding so that the opening angle between the two crossover portions is an acute angle.

The gist of the seventh aspect of the invention is the armature manufacturing method according to the sixth aspect, wherein the crossover portion is drawn outside the outer diameter of the commutator.
The invention according to claim 8 is the armature manufacturing method according to claim 6, wherein the dummy winding is performed by making a slot pitch of the dummy winding wider than a slot pitch of the main winding. The gist.

  The invention according to claim 9 is the armature manufacturing method according to any one of claims 6 to 8, further comprising a plurality of winding mechanisms for performing the winding, and simultaneously by the plurality of winding mechanisms. In the method of manufacturing an armature that performs a plurality of windings, at least one of the winding procedures of the winding is to perform a plurality of windings simultaneously.

(Function)
According to the first aspect of the present invention, the dummy windings are wound so that the opening angle between the two connecting wire parts is an acute angle, so that the connecting wire parts that cause a short circuit failure can be obtained. It is possible to avoid contact between the fusing electrode and the winding part, which causes overlapping and bonding failure. Further, by connecting the crossover portions in this way, the commutator can be re-pressed, the distance between the commutator and the rotor core can be shortened, and the overall length of the motor can be shortened.

  According to the second aspect of the present invention, the winding portion is dummy-wound and then connected to the segment, or connected to the segment and then dummy-wound. By performing the dummy winding in this way, the opening angle of the two connecting wire portions becomes an acute angle, and the connecting wire portions do not overlap each other.

  According to the third aspect of the present invention, the dummy winding portion can be realized by making the dummy winding slot pitch wider than the main winding slot pitch. By performing the dummy winding in this manner, the dummy winding can be easily processed. That is, the number of times the arm of the winding machine is moved basically does not increase even if dummy winding is performed, so that winding processing is easy. In addition, productivity is high because the number of times to move the arm of the winding machine does not increase.

  Further, according to the invention described in claim 4, the winding is performed so that the direction of the current flowing into the brush through the winding is the forward direction so that the rotation is not braked when the motor rotates. Can be disguised.

  Further, according to the invention described in claim 5, by making the segment connection into a mountain connection, it is possible to avoid contact between the fusing electrode and the winding, which causes a bonding failure, and recompress the commutator. Sometimes there will be no breaks or excessive bending of the windings.

  In addition, according to the invention described in claim 6, the connecting wire portions that cause a short circuit failure are wound by the dummy winding process so that the opening angle of the two connecting wire portions is an acute angle. It is possible to avoid contact between the fusing electrodes and the windings, which cause the overlapping of the electrodes and the bonding failure. Further, by connecting the crossover portions in this way, the commutator can be re-pressed, the distance between the commutator and the rotor core can be shortened, and the overall length of the motor can be shortened.

  According to the seventh aspect of the invention, the connecting wire portion is drawn out to the outside of the outer diameter of the commutator, so that the connecting wire portion does not wind around the shaft, and the commutator and the rotation are prevented. A space will be created between the child core. And since there is such a space, recompression of the commutator becomes possible. Further, by adopting such a configuration, it is possible to suitably press-fit, and the commutator and the rotor core can be brought close to the press-fit limit necessary for insulation.

  According to the eighth aspect of the present invention, the dummy winding portion can also be realized by making the dummy winding slot pitch wider than the main winding slot pitch. By performing the dummy winding in this manner, the dummy winding can be easily processed. That is, the number of times the arm of the winding machine is moved basically does not increase even if dummy winding is performed, so that winding processing is easy. In addition, productivity is high because the number of times to move the arm of the winding machine does not increase.

  According to the ninth aspect of the present invention, the winding time can be shortened by simultaneously performing a plurality of windings. In addition, by reducing the processing time, the cost can be reduced.

  Overlapping of the crossover portions that cause a short circuit failure and contact between the fusing electrode and the winding that cause a joint failure are avoided, and the commutator can be re-pressed. By re-pressing the commutator, the distance between the commutator and the rotor core can be shortened, and the total length of the motor can be shortened.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example in which the armature of a rotating electrical machine according to the present invention is used in an electric pump.

The electric pump 1 includes a motor unit 2 and a pump unit 3 as electric motors.
The motor unit 2 includes a bottomed cylindrical motor yoke 21, and an opening end 21 a thereof is fixed to a pump housing 41, which will be described later, by a bolt 12 via an O-ring 11, for example. An arc-shaped magnet 22 is fixed to the inner peripheral surface of the motor yoke 21. In the present embodiment, a six-pole magnet 22 is disposed as a field of the electric motor. An armature 23 is disposed in the motor yoke 21 so as to face the magnet 22.

  The armature 23 is connected to a rotor core 24, a shaft 25 as a rotation shaft that supports the rotor core 24, a commutator (commutator) 26 fixed to the shaft 25 so as to be integrally rotatable, and the commutator 26. And a rotor winding 31 wound around the rotor core 24. The shaft 25 is pivotally supported by a bearing 51 fixed to the pump housing 41 and a bearing 52 fixed to the motor yoke 21. An eccentric bearing 43 is fixed to one end of the shaft 25.

  The pump unit 3 includes a pump housing 41, and a housing portion 42 into which the eccentric bearing 43 is inserted is formed in the pump housing 41. A plunger 44 disposed in the pump housing 41 is in contact with a part of the outer peripheral surface of the eccentric bearing 43. Accordingly, when the eccentric bearing 43 is eccentrically moved by the rotation of the shaft 25, the plunger 44 is reciprocated, and the oil sucked from the suction hole 45 formed in the pump housing 41 is discharged from the discharge hole 46.

The commutator 26 is in contact with a brush 27 as a current supply terminal, and supplies a current to a winding (winding portion) 28 wound around the rotor core 24.
The rotor core 24 is provided with a plurality (19 in this embodiment) of teeth 24c at equal angular intervals along the circumferential direction. Each tooth 24c has a substantially T-shape with protrusions extending on both sides in the circumferential direction at the tip thereof. A slot 24b is formed between the teeth 24c.

  The commutator 26 includes a plurality of segments 29 arranged along the circumferential direction. In the present embodiment, 19 segments 29 are provided. Each segment 29 is provided with a connection claw 29a.

  A rotor winding 31 is wound between the slots 24b of the rotor core 24 by wave winding. Further, a rotor winding 31 is connected to the connection claw 29a of the segment 29 by a mountain connection.

  The rotor winding 31 is composed of a plurality of winding portions 28, and each winding portion 28 is connected between two segments 29. Since the armature 23 of the present embodiment includes 19 segments 29, the armature 23 includes 19 winding portions 28 corresponding thereto. As shown in FIG. 2, each winding portion 28 includes a crossover portion 28a connected to the segment 29, a main winding portion 28b wound at a predetermined number of turns across a plurality of teeth 24c, and a crossover portion. A dummy winding portion 28c is provided for making the opening angle 28a acute. The opening angle of the connecting wire portion 28 a is an angle formed by the two connecting wire portions 28 a connected to each segment 29.

  In the description using FIG. 2, the teeth numbers are first to nineteenth teeth in order to distinguish the nineteen teeth 24c composed of the nineteen slots 24b. Further, in order to distinguish the 19 segments 29 from each other, the segment numbers are designated as the first to 19th segments 29.

  In FIG. 2, the pitch (segment pitch) of the segments 29 connecting the winding portions 28 is “1: 7”, and the coil pitch of the main winding portion 28 b is “1: 4”. The segment pitch “1: 7” represents the relative position of the segment 29 connecting the winding portions 28. The winding part 28 is connected to two segments 29, and when the segment 29 to start winding is the first, the end of winding is the seventh segment 29. The coil pitch “1: 4” relatively represents the slot position of one coil piece and the slot position of the other coil piece. The slot 24b in which the one coil piece is arranged is the first, and the slot. It shows that the other coil piece is arranged in the fourth slot 24b counting from 24b.

  As described above, the winding is connected to the connection claw 29a of each segment 29 by the mountain connection. In other words, each segment 29 is connected to the connecting claw 29a and two connecting wire portions 28a passed between the connecting claw 29a and the nearest slot 24b. The angle (opening angle) formed by these two connecting wire portions 28a is determined by the positional relationship between the connecting claw 29a to which they are connected and the slot 24b to which each is connected. And in this embodiment, the crossover part 28a is connected to the slot 24b nearest to the connection nail | claw 29a.

  For example, in the case of the armature 23 shown in FIG. 2, the slot 24 b closest to the first segment 29 is a slot 24 b formed on both sides of the first tooth 24 c corresponding to the first segment 29. That is, a slot 24b formed between the 19th tooth 24c and the first tooth 24c and a slot 24b formed between the first tooth 24c and the second tooth 24c, and these slots 24b are adjacent to each other. Matching.

  On the other hand, in the conventional example, as shown in FIG. 11, the slot 124 b through which the crossover portion 128 a connected to the segment 129 is separated from the segment 129. Therefore, the opening angle of the two connecting wire portions 28a connected to each segment 29 shown in FIG. 2 is narrower than the angle formed by the connecting wire portions of the winding portions wave-wound at the conventional slot pitch and segment pitch. . For this reason, as shown in FIG. 3, the two connecting wire portions 28 a respectively connected to the connection claws 29 a of the adjacent segments 29 do not intersect or are separated from the segment 29 even if they intersect. Accordingly, in the fusing process for connecting the crossover portion 28a to the segment 29, for example, the covering (insulating film) of the winding portion is not removed up to the intersection of the crossover crossover portion 28a, so that contact between the crossover portions 28a is prevented. Is done.

  Further, the dummy winding portion 28c is connected to the segment 29 according to the relative positional relationship between the segment 29, the teeth 24c and the slot 24b and the position of the teeth 24c around which the main winding portion 28b is wound. Is provided to prevent crossing. For example, in FIG. 2, the winding portion 28 connected to the first segment 29 has the main winding portion 28b wound around the first to third teeth 24c. When the connecting wire portion 28 a is connected from the main winding portion 28 b to the seventh segment 29, the connecting wire portion 28 a intersects the connecting wire portion 28 a connected to the fifth and sixth segments 29. For this reason, a dummy winding portion 28c is formed by winding the seventh tooth 24c from the main winding portion 28b (passing through the slot 24b between the sixth and seventh teeth 24c and the slot 24b between the seventh and eighth teeth 24c). Is formed. Thereby, the crossover portion 28 a connected to the seventh segment 29 does not intersect the crossover portion 28 a connected to the other segment 29.

Next, a method for manufacturing the armature described above with reference to FIGS. 2 and 3 will be described.
FIG. 2 is a conceptual diagram illustrating the winding method of the present embodiment. FIG. 2 shows a part of all windings for convenience of explaining the winding method.

  As shown in FIG. 2, first, the first winding portion 28 is connected to the connection claw 29a (FIG. 1) of the first segment 29 by mountain connection (start). The winding portion 28 is passed between the 19th tooth 24c and the first tooth 24c, and is passed between the third tooth 24c and the fourth tooth 24c. This is wound for the number of turns (main winding process). Then, it passes between the third tooth 24c and the fourth tooth 24c, passes through the rotor core end face 24a (FIG. 1) on the segment 29 side of the commutator 26, passes between the sixth tooth 24c and the seventh tooth 24c, The seventh tooth 24c is wound, for example, for one turn through the space between the seventh tooth 24c and the eighth tooth 24c (dummy winding step). And it connects to the connection nail | claw 29a of the 7th segment 29 by a mountain connection. Here, the rotor core end surface 24 a on the segment 29 side is referred to as a so-called surface of the rotor core 24. In addition, the rotor core end surface 24 a opposite to the segment 29 side with respect to the surface of the rotor core 24 is referred to as a so-called back surface of the rotor core 24.

  Next, the second winding portion 28 is connected to the connection claws 29a of the seventh segment 29 by mountain connection, and the sixth tooth 24c and the seventh tooth 24c are the same as the first winding portion 28. Wrapping through. Hereinafter, this winding method is repeated for all the segments 29.

  By connecting in this way, for example, the connecting claws 29a of the seventh segment 29 are ridged and the connecting wire portions 28a of the two winding portions 28 are connected. One of the connecting wire portions 28a is directed to the seventh segment 29 from the slot 24b between the seventh tooth 24c and the eighth tooth 24c, and the other connecting wire portion 28a is connected to the sixth tooth 24c from the seventh segment 29c. It passes toward the slot 24b between the seventh teeth 24c. That is, the crossover portion 28 a connected to the seventh segment 29 is passed between the slot 24 b on both sides of the seventh tooth 24 c and the seventh segment 29.

  After performing the main winding in this way, the dummy winding is performed, and as shown in FIG. 3, the winding is passed through the slot 24b closest to the segment 29 connecting the connecting wire portion 28a, and the two connecting wire portions 28a are connected to each other. The opening angle can be an acute angle.

Then, the commutator 26 is re-pressed by the re-pressing mechanism of the commutator 26 (FIG. 1) (recompression of the commutator).
At this time, the crossover portion 28 a is drawn outside the outer diameter of the commutator 26. Accordingly, as shown in FIG. 1, since the winding portion 28 is not wound around the shaft 25, when the commutator 26 is re-pressed, the commutator 26 is brought close to the press-fit limit necessary for insulation to rotate the rotor core 24. The axial length of the shaft can be shortened. Further, since the connecting wire portion 28a is drawn outside the outer diameter of the commutator 26, the connecting wire portion 28a is not forcibly bent when the commutator 26 is re-pressed, so that the disconnection is prevented.

Next, the winding sequence of the windings of this embodiment will be described with reference to FIG.
4A is a top view showing a winding mode of a 19-slot rotor core, FIG. 4B is a chart for explaining the winding sequence, and FIG. 4C is a concept showing the winding sequence of the windings. FIG. The segment number and the tooth number in FIG. 4A correspond to the numbers in FIG.

  As shown in FIG. 4A, the left former 61 and the right former 62 as guide jigs for the two winding mechanisms correspond to the slot pitch so that the winding portion 28 can be guided into the slot 24b at a predetermined slot pitch. The length is formed. In the present embodiment, the left former 61 and the right former 62 are formed to have a length corresponding to three teeth 24c. Further, the left former 61 and the right former 62 are disposed at an interval at which the seven teeth 24c are sandwiched. Then, the winding is wound around the left former 61 and the right former 62 by a flyer of a winding mechanism (not shown), and the winding portion 28 is wound between the slots 24b to be inserted. Then, the left former 61, the right former 62, and the respective flyers cooperate to perform winding between different slots 24b at the same time (double winding).

  Here, the winding procedure of the winding will be described. Here, in the winding order 1-8, the left former 61, the right former 62 and the respective flyers cooperate to perform the above-described double winding, and in the winding orders 9-11, the right former 62 and the right former 62 flyers. Cooperate to perform winding (single winding) between the slots 24b.

  As shown in FIG. 4B, in the winding order 1, double winding is performed, the winding (A) is guide-wound by the left-side former 61, and the winding (K) is guide-wound by the right-side former 62. Note that the winding (A) indicates a winding centered on the tooth indicated by the symbol (A) in FIG.

  Similarly, in the winding order 2 to 8, double winding is performed, the windings (G) to (E) are guided by the left former 61, and the windings (Q) to (O) are guided by the right former 62. Disguise. In FIG. 4B, L1 to L8 indicate the winding order of the left former 61, and R1 to R11 indicate the winding order of the right former 62.

  In FIG. 4C, in the winding mode up to the winding order 2, the winding by the left former 61 is indicated by a solid line, and the winding by the right former 62 is indicated by a broken line. Thereafter, in the same winding method, in the winding order 3, the winding (M) is guide-wound by the left former 61 and the winding (D) is guide-wound by the right former 62. In the winding order 4, the winding (S) is guide-wound by the left former 61 and the winding (J) is guide-wound by the right former 62. In the winding order 5, the winding (F) is wound by the left former 61 and the winding (P) is wound by the right former 62. In the winding order 6, the winding (L) is guide-wound by the left former 61 and the winding (C) is wound by the right former 62. In the winding order 7, the winding (R) is guide-wound by the left-side former 61 and the winding (I) is guide-wound by the right-side former 62. In the winding order 8, the winding (E) is guide-wound by the left former 61 and the winding (O) is guide-wound by the right former 62.

  In winding order 9, single winding is performed, and the winding (B) is guide-wound by the right-side former 62. Similarly, in the winding order 10, the winding (H) is guide-wound by the right former 62, and in the winding order 11, the winding (N) is guide-wound by the right former 62. As described above, the winding portion 28 is wound in the winding order 9 to 11 in a single winding so that the winding is not performed at the same place.

  By winding in such a winding order, even in an odd slot such as 19 slots, the two left and right formers 61 and 62 can simultaneously perform double winding. This shortens the processing time and improves productivity. In addition, the cost can be reduced.

According to the first embodiment described below, the excellent effects listed below can be obtained.
(1) The winding portion 28 is passed from the slot 24b immediately adjacent to the segment 29, and the opening angle of the crossover portion 28a connecting the slot 24b and the segment 29 is made an acute angle, which causes a short circuit failure. It becomes possible to avoid the overlapping of the crossover portions 28a and the contact between the fusing electrode and the winding portion 28, which causes a bonding failure. Further, by connecting the crossover portion 28a in this way, the commutator 26 can be re-pressed, the distance between the commutator 26 and the rotor core 24 can be shortened, and the overall length of the motor can be shortened. It becomes like this.

  (2) The crossover portion 28a is drawn outside the outer diameter of the commutator 26. With such a configuration, the distance between the commutator 26 and the rotor core 24 can be brought close to the press-fit limit necessary for insulation. Thus, the total length of the motor can be further reduced by shortening the distance between the commutator 26 and the rotor core 24 to the limit.

  (3) By forming the dummy winding portion 28c after forming the main winding portion 28b, the number of turns of the main winding portion 28b can be made equal to the conventional number of turns. For this reason, it is possible to suppress a decrease in torque when the motor rotates.

  (4) By making the connection of the segment 29 into a mountain connection, it is possible to avoid contact between the fusing electrode and the winding, which causes a bonding failure, and the winding portion 28 is disconnected when the commutator 26 is re-pressed. Or excessive bending can be prevented.

  (5) Even if the number of slots is 19 slots (odd number slots), the winding time can be shortened by simultaneously winding two winding portions 28 using two winding mechanisms. It becomes like this. In addition, the cost can be reduced.

In addition, you may change the said embodiment as follows.
In the above embodiment, the winding order 1 to 8 is double winding and the winding order 9 to 11 is single winding. However, the winding order is not limited to this. For example, winding order 1 to 3 may be single winding, and winding order 4 to 11 may be double winding. By winding in such a winding order, it is possible to obtain the same effect as in the above embodiment or an effect equivalent thereto.

  In the above embodiment, the 19-slot rotor core 24 is exemplified, but the number of slots of the rotor core 24 is not limited to 19 slots. Further, the number of slots in the rotor core is not limited to odd slots. In short, any rotor core having a plurality of slots capable of winding may be used.

  In the above embodiment, the winding mechanism including the left former 61 and the right former 62 is illustrated, but the winding mechanism is not limited to two. The winding mechanism may include a plurality of formers and a plurality of flyers. Further, the winding mechanism is not limited to the former and the flyer, and may be a winding mechanism using a nozzle, for example. Although it is desirable to provide a plurality of winding mechanisms because the machining time can be shortened, it is sufficient to provide one winding mechanism when manufacturing the armature.

  In the above embodiment, dummy winding is performed and the crossover portion 28a is passed from the slot 24b on both sides of one tooth 24c to the segment 29. However, this dummy winding is performed from the slots 24b on both sides of one tooth 24c. The winding portion 28 is not limited to the one that comes out. For example, as shown in FIG. 5, dummy winding may be performed across the two teeth 24 c so that the crossover portion 28 a is passed between each slot 24 b and the segment 29. By forming the crossover portion 28a in this way, as shown in FIGS. 6A to 6C, coil pieces of the windings disposed in each slot 24b (the main winding portion 28b and the dummy winding portion 28c). Current in the same direction can be passed through the coil piece. 6A to 6C, an arrow attached to the winding portion 28 indicates a direction in which a current flows. On the other hand, in the first embodiment, currents in different directions may flow through the coil pieces of the windings arranged in the same slot 24b, which reduces the number of magnetic fluxes generated in the winding part 28. This will cause a decrease in torque. Therefore, in the present embodiment, since currents in the same direction flow through the coil pieces of the slot 24b, a decrease in the number of magnetic fluxes generated in the winding portion 28 can be suppressed, and a decrease in torque can be suppressed.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings.
In the second embodiment, another method of the winding method described in the first embodiment will be described. In the first embodiment, the dummy winding is performed after the main winding is performed, whereas in the second embodiment, a winding method in which the dummy winding is performed first and then the main winding is described.

  Here, the winding method of the second embodiment will be described with reference to FIG. FIG. 7 is a conceptual diagram illustrating the winding method according to the second embodiment. As in the first embodiment, in order to make the winding method easy to understand, the teeth numbers are defined as first to nineteenth teeth 24c in order to distinguish 19 teeth 24c composed of 19 slots 24b. . Further, in order to distinguish the 19 segments 29 from each other, the segment numbers are designated as the first to 19th segments 29. Here, for convenience of explanation of the winding method, a part of all windings is shown. Further, as an example, the segment pitch is wound with 6 segments (“1: 7”), the slot pitch of the main winding portion 28b is wound with 3 slots (“1: 4”), and the slot pitch of the dummy winding portion 28c. Is wound in 3 slots ("1: 4").

  As shown in FIG. 7, first, the first winding portion 28 is connected to the connection claw 29a (FIG. 1) of the first segment 29 by mountain connection (start). The winding portion 28 passes between the first tooth 24c and the second tooth 24c, passes through the back surface of the rotor core 24, passes between the fourth tooth 24c and the fifth tooth 24c, The fourth tooth 24c is wound, for example, for one turn through the space between the third tooth 24c and the fourth tooth 24c (dummy winding step). Then, after the dummy winding, it passes between the sixth tooth 24c and the seventh tooth 24c, again passes between the third tooth 24c and the fourth tooth 24c, and is wound for the number of turns (main winding step). ). And it connects to the connection nail | claw 29a of the 7th segment 29 by a mountain connection. Next, the second winding portion 28 is connected to the connection claws 29 a of the seventh segment 29 by mountain connection and wound in the same manner as the first winding portion 28. Hereinafter, this winding method is repeated for all the segments 29.

  By connecting in this way, for example, the first winding portion 28 of the seventh segment 29 enters between the sixth tooth 24c and the seventh tooth 24c. Further, the second winding portion 28 is connected in a mountain-like manner from the seventh segment 29 and comes out between the seventh tooth 24c and the eighth tooth 24c, so that the slots 24b adjacent to both sides of the seventh tooth 24c. It is possible to bring the winding portion 28 out of the wire.

  In this way, by performing the dummy winding first and then performing the main winding, as shown in FIG. 3 described above, the winding portion 28 is passed through the slot 24b closest to the segment 29 connecting the crossover portion 28a. The opening angle between the crossover portions 28a of the books can be an acute angle.

  According to the second embodiment described above, it is possible to obtain the same effects as the effects (1), (2) and (4) to (6) according to the first embodiment or an effect equivalent thereto. In addition, the following effects can be newly obtained.

  (7) The dummy winding portion 28c can be realized by performing the main winding after performing the dummy winding. Further, by performing the dummy winding in this way, the number of turns of the dummy winding is wound, so that the number of turns of the main winding portion 28b can be made equal to the conventional number of turns. For this reason, it is possible to suppress a decrease in torque when the motor rotates.

In addition, you may change the said embodiment as follows.
In the above embodiment, the first winding portion 28 is passed between the sixth tooth 24c and the seventh tooth 24c and connected to the seventh segment 29 by a mountain connection, but for example, as shown in FIG. As described above, the first winding portion 28 may be passed through between the fifth tooth 24 c and the sixth tooth 24 c and connected to the first segment 29. By connecting in this way, current in the same direction flows through the coil pieces of the slot 24b, so that a decrease in the number of magnetic fluxes generated in the winding portion 28 can be suppressed, and a decrease in torque can be suppressed.

Further, winding is performed across the two teeth 24c in this way, and the slot pitch is widened, so that winding processing is facilitated during winding.
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings.

  In the third embodiment, another method of the winding method described in the first embodiment and the second embodiment will be described. In the second embodiment, the slot pitch of the dummy winding portion is wound with 3 slots (“1: 4”), whereas in the third embodiment, the slot pitch of the dummy winding portion is set to the main winding. Winding wider than the slot pitch (3 slots ("1: 4")), the dummy winding section is wound with 5 slots ("1: 6").

  Here, the winding method of the third embodiment will be described with reference to FIG. FIG. 9 is a conceptual diagram illustrating the winding method of the third embodiment. As in the first embodiment and the second embodiment, in order to make the winding method easy to understand, the tooth numbers 1 to 1 are used to distinguish the 19 teeth 24c composed of 19 slots 24b. The nineteenth tooth 24c is assumed. Further, in order to distinguish the 19 segments 29 from each other, the segment numbers are designated as the first to 19th segments 29. Here, for convenience of explanation of the winding method, a part of all windings is shown. The segment pitch is wound with 6 segments (“1: 7”).

  As shown in FIG. 9, first, the first winding portion 28 is connected to the connection claw 29a (FIG. 1) of the first segment 29 by mountain connection (start). The winding portion 28 is passed between the first tooth 24c and the second tooth 24c, passed through the back surface of the rotor core 24, and passed between the sixth tooth 24c and the seventh tooth 24c, for example, for one turn. Wear (dummy winding process). And between the 3rd teeth 24c and the 4th teeth 24c, it passes between the 6th teeth 24c and the 7th teeth 24c, and this space is wound by the number of turns (main winding process). And it connects to the connection nail | claw 29a of the 7th segment 29 by a mountain connection. Next, the second winding portion 28 is connected to the connection claws 29 a of the seventh segment 29 by mountain connection and wound in the same manner as the first winding portion 28. Hereinafter, this winding method is repeated for all the segments 29.

  By connecting in this way, for example, the first winding of the seventh segment 29 enters between the sixth tooth 24c and the seventh tooth 24c. The second winding is connected in a mountain-like manner from the first segment 29 and goes out from between the seventh tooth 24c and the eighth tooth 24c, so that the second winding is wound from the adjacent slots 24b of the seventh tooth 24c. The line portion 28 can be brought out.

  Thus, even when the slot pitch of the dummy winding portion 28c is wound with 5 slots, as shown in FIG. 3 described above, the winding portion 28 is passed from the slot 24b closest to the segment 29 connecting the crossover portion 28a, The opening angle between the two connecting wire portions 28a can be an acute angle.

  According to the third embodiment described below, it is possible to obtain the same effects as the effects (1), (2) and (4) to (6) of the previous first embodiment, or an equivalent effect. In addition, the following effects can be newly obtained.

  (8) The dummy winding portion 28c can be realized by making the slot pitch of the dummy winding portion 28c wider than the slot pitch of the main winding portion 28b. By performing the dummy winding in this manner, the dummy winding can be easily processed. That is, the number of times the arm of the winding machine is moved basically does not increase even if dummy winding is performed, so that winding processing is easy. In addition, productivity is high because the number of times to move the arm of the winding machine does not increase.

In addition, you may change the said embodiment as follows.
In the above embodiment, the slot pitch of the dummy winding portion 28c is wound at 5 slots ("1: 6"), but the slot pitch of the dummy winding portion 28c is not limited to 5 slots. For example, as shown in FIG. 10, the slot pitch of the dummy winding portion 28c may be 4 slots (“1: 5”). By connecting in this way, current in the same direction flows through the coil pieces of the slot 24b, so that a decrease in the number of magnetic fluxes generated in the winding portion 28 can be suppressed, and a decrease in torque can be suppressed.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to the drawings.
In the fourth embodiment, another method of the winding method described in the first to third embodiments will be described. In the fourth embodiment, the windings of the dummy winding portions are wound so as to sew so that the back surface of the rotor core and the front surface of the rotor core are alternately passed for each slot.

  Here, the winding method of the fourth embodiment will be described with reference to FIG. FIG. 11 is a conceptual diagram illustrating the winding method according to the fourth embodiment. As in the first to third embodiments, in order to make the winding method easy to understand, the tooth numbers are assigned to the first to nineteenth to distinguish the nineteen teeth 24c composed of the nineteen slots 24b. Teeth 24c. Further, in order to distinguish the 19 segments 29 from each other, the segment numbers are designated as the first to 19th segments 29. Here, for convenience of explanation of the winding method, a part of all windings is shown. The segment pitch is wound with 6 segments (“1: 7”), and the slot pitch of the main winding portion 28b is wound with 3 slots (“1: 4”).

  As shown in FIG. 11, first, the first winding portion 28 is connected to the connection claws 29a (FIG. 1) of the first segment 29 by mountain connection (start). The connecting portion 28 passes between the first teeth 24c and the second teeth 24c, passes through the back surface of the rotor core 24 (FIG. 1), and passes between the second teeth 24c and the third teeth 24c. For example, one turn is wound through the surface of the core 24 and between the third tooth 24c and the fourth tooth 24c (dummy winding step). That is, the winding of the dummy winding portion 28c is alternately passed through the back surface of the rotor core 24 and the front surface of the rotor core 24 every slot, and the teeth 24c are wound so as to be sewn.

  Then, the winding 28 is passed between the sixth tooth 24c and the seventh tooth 24c, and again between the third tooth 24c and the fourth tooth 24c, so that the space is wound for the number of turns (main winding step). ). And it connects to the connection nail | claw 29a of the 7th segment 29 by a mountain connection. Next, the second winding portion 28 is connected to the connection claws 29 a of the seventh segment 29 by mountain connection and wound in the same manner as the first winding portion 28. Hereinafter, this winding method is repeated for all the segments 29.

  By connecting in this way, for example, the first winding of the seventh segment 29 enters between the sixth tooth 24c and the seventh tooth 24c. The second winding is connected in a mountain-like manner from the first segment 29 and goes out from between the seventh tooth 24c and the eighth tooth 24c, so that the second winding is wound from the adjacent slots 24b of the seventh tooth 24c. The line portion 28 can be brought out.

  In this way, the winding of the dummy winding portion 28c is passed through the front and back of the rotor core 24 for each slot and wound so as to sew the slot 24b, as shown in FIG. The opening angle between the two connecting wires 28a can be set to an acute angle through the winding portion 28 from the slot 24b closest to the segment 29 connecting the wires 28a.

  According to the fourth embodiment described below, it is possible to obtain the same effect as the effects (1), (2) and (4) to (6) according to the first embodiment, or an effect equivalent thereto. In addition, the following effects can be newly obtained.

  (9) The dummy winding portion 28c can also be realized by winding the winding of the dummy winding portion 28c through the front and back of the rotor core 24 for each slot and sewing the slot 24b. Further, by performing the dummy winding in this way, the number of turns of the dummy winding is wound, so that the number of turns of the main winding portion 28b can be made equal to the conventional number of turns. For this reason, it is possible to suppress a decrease in torque when the motor rotates.

In addition, you may change the said embodiment as follows.
In the above embodiment, the windings of the dummy winding portion 28c are alternately wound through the back surface of the rotor core 24 and the front surface of the rotor core 24 every slot, and the teeth 24c are wound so as to be sewn. However, the winding method is not limited to this. For example, as shown in FIG. 12, after winding the dummy winding portion 28c for one slot, the main winding portion 28b may be wound, and the dummy winding portion 28c may be wound again for one slot. Alternatively, for example, as shown in FIG. 13, after winding the main winding portion 28b, the winding of the dummy winding portion 28c is alternately placed on the front surface of the rotor core 24 and the back surface of the rotor core 24 for each slot. The teeth 24c may be wound so as to sew.

(Other embodiments)
Other elements that can be changed in common with the above embodiments include the following.
In each of the above embodiments, the number of turns of the dummy winding portion 28c is one turn, but the number of winding turns of the dummy winding portion 28c is not limited to one turn. That is, the number of turns of the dummy winding portion 28c is arbitrary.

The schematic sectional drawing which shows an example which used the rotor core of the rotary electric machine concerning this invention for the electric pump. The conceptual diagram explaining the winding method of 1st Embodiment. The enlarged view which shows the coil | winding aspect of the crossover part connected to the segment concerning this invention. Regarding the winding sequence of the first embodiment, (a) is a top view showing a winding mode of a 19-slot rotor core, (b) is a diagram illustrating the winding sequence, and (c) is a winding winding. The conceptual diagram which shows a line order. The conceptual diagram which shows the modification of the winding method of the said 1st Embodiment. (A)-(c) is a conceptual diagram which shows the movement aspect of a brush about the modification of the winding method of the said 1st Embodiment. The conceptual diagram explaining the winding method of 2nd Embodiment. The conceptual diagram which shows the modification of the winding method of 2nd Embodiment. The conceptual diagram explaining the winding method of 3rd Embodiment. The conceptual diagram which shows the modification of the winding method of 3rd Embodiment. The conceptual diagram explaining the winding method of 4th Embodiment. The conceptual diagram which shows the modification of the winding method of the 4th Embodiment. The conceptual diagram which shows another Example of the winding method of the 4th Embodiment. The conceptual diagram explaining the conventional winding method. The top view explaining the conventional mountain connection. The top view explaining the conventional alpha multiplication connection.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Motor part, 22 ... Magnet, 23 ... Armature, 24 ... Rotor core, 24a ... Rotor core end surface, 24b ... Slot, 24c ... Teeth, 25 ... Shaft, 26 ... Commutator (commutator), 27 ... Brush 28 ... Winding (winding part), 28a ... Crossover part, 28b ... Main winding part, 28c ... Dummy winding part, 29 ... Segment, 29a ... Connection claw.

Claims (9)

A rotating shaft, a rotor core mounted on the rotating shaft and provided with a plurality of teeth along the circumferential direction, and slots are formed between the teeth; and a rotor core. Each segment is provided with a commutator in which a connection part for connecting a winding is formed in each segment, and a winding part wound around the plurality of teeth, and after winding of the winding part, In the armature of the rotating electrical machine in which the commutator is re-pressed in the axial direction of the rotating shaft with respect to the rotor core,
The winding portion is
Two crossovers connected to the segment of the commutator;
A main volume wound around the teeth for a number of turns in the slot, and
An armature for a rotating electric machine, comprising: a dummy winding portion connected to the main winding portion and wound so that an angle formed by the two crossover portions is an acute angle.   The two crossover portions are composed of a first crossover portion connected to the segment and a second crossover portion, and the dummy winding portion includes the first crossover portion and the second crossover portion. The armature for a rotating electrical machine according to claim 1, connected to at least one of the crossover portion.   The armature for a rotating electrical machine according to claim 1 or 2, wherein the dummy winding portion is formed by making a slot pitch of the dummy winding portion wider than a slot pitch of the main winding portion.   The armature of the rotating electrical machine according to any one of claims 1 to 3, wherein the dummy winding portion is wound so that a current flowing into a brush as a current supply terminal is a forward direction.   The armature of the rotating electrical machine according to any one of claims 1 to 4, wherein the connection of the segment is a mountain connection. A rotating shaft, a rotor core that is attached to the rotating shaft and has a plurality of teeth and slots, a commutator that is press-fitted in the axial direction of the rotating shaft with respect to the rotor core, and a coil wound around the slot. In the method of manufacturing an armature in which a commutator is re-press-fitted in the axial direction of the rotation shaft with respect to the rotor core after the winding portion is wound.
The winding portion is
Two crossovers connected to the commutator segment;
A main winding step of winding the winding over the teeth for a number of turns across the teeth;
A dummy winding step of winding the two crossover portions so that the opening angle between the two crossover portions is an acute angle.   The method for manufacturing an armature according to claim 6, wherein the crossover portion is drawn outside the outer diameter of the commutator.   The armature manufacturing method according to claim 6, wherein the dummy winding is performed by making a slot pitch of the dummy winding wider than a slot pitch of the main winding. In a manufacturing method of an armature comprising a plurality of winding mechanisms for performing the winding, and performing a plurality of windings simultaneously by the plurality of winding mechanisms,
The armature manufacturing method according to any one of claims 6 to 8, wherein at least one of the winding procedures of the winding performs a plurality of windings simultaneously.

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