JPH0667162B2 - Rotating machine rotor - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotor for a rotary electric machine such as a starter mohi.

[Problems to be Solved by Prior Art and Invention] Generally, in this type of rotating electric machine, a rotor (armature) around which a coil is wound is rotatably supported. In this case, it is conceivable to increase the diameter of the coil and increase the number of slots (grooves) around which the coil is wound due to the output up.

Therefore, conventionally, there is a coil in which one large-diameter coil is formed in a substantially U shape and a pair of the coils is wound in two layers. However, in this coil, two coils are inserted into the same slot. Therefore, it is proposed that the slot shape is a long hole shape that is long in the radial direction so that the two coil leg portions are adjacently inserted inside and outside the rotor radial direction. However, in this case, the space between the inner diameter side portions of the adjacent slots becomes narrower, and as a result, the teeth width becomes narrower at this portion, the magnetic flux density becomes higher, the magnetic resistance increases, and the magnetic saturation may occur. However, there is a drawback in that the mechanical strength also decreases.

Then, the deep width slot and the shallow groove slot for inserting the coils in a row in the radial direction of the rotor are alternately arranged to secure a wide width of the teeth, and the above-mentioned problem of the teeth is solved. However, when forming the coil fitting groove for connecting the tip of the coil protruding from these slots to the commutator, the coil fitting groove is formed corresponding to the coil protruding position from the inside of the deep groove slot. When trying to do so, the coil diameter is large due to the fact that the coil protruding position is biased toward the shaft core side,
The coil fitting grooves are concentrated on the shaft core side, and as a result, it is difficult to wire because the coils are crowded together,
There is a new problem that the gap between the adjacent risers becomes narrow and the insulator that insulates the adjacent risers from each other may be damaged when the coil fitting groove is created, and these need to be solved further. .

[Means for Solving the Problem] The present invention has been devised with the object of providing a rotor for a rotating electric machine capable of eliminating these drawbacks in view of the above circumstances, and a rotor core portion ( 5), a first coil (8) and a second coil (9) of each single wire, and a commutator (11), wherein the rotor core portion (5) has a long length in the rotor radial direction. Array-shaped second slot (7) having a hole-shaped first slot (6) and a narrow connecting portion (7c) in the radial direction of the rotor
Are alternately formed, and the commutator (11) has a riser portion (11a) formed to project like a flange, and the riser portion 11a has a depth substantially the same as the inner diameter side insertion portion (6b) position of the first slot. The first coil (8) has an outer diameter side insertion portion (6a or 7a) of the first or second slot and an inner diameter side insertion of the first slot. A pair of leg portions (8a, 8b) to be inserted into the portion (6b),
It has a small-diameter tip connecting portion (8c, 8d) protruding substantially linearly from each of the insertion portions (6a or 7a, 6b) and fitted to the inner and outer diameter side portions of the coil fitting groove (11b), respectively. The second coil (9) has a pair of legs (9a, 9b) and has an outer diameter side insertion portion (7a or 6a) of the first or second slot and an inner diameter side insertion portion (7b) of the second slot. ) And one of the small-diameter tip connecting portions (9c) protrudes substantially linearly from the outer diameter side insertion portion (7a or 6a) and is fitted into the outer diameter side portion of the coil fitting groove (11b). The other end portion (9d) having a small diameter is bent and protrudes from the inner diameter side insertion portion (7b) so as to widen in the outer diameter direction and protrudes to the inner diameter side of the coil fitting groove (11b). It is characterized in that it is fitted to the section.

Further, according to the present invention, the distance between the adjacent slots can be made large and the inner coil can be effectively prevented from being crowded by this configuration.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a yoke of a motor which is a rotary electric machine, and a permanent magnet 2 is integrally fixed to the inner circumference of the yoke 1. On the other hand, 3 is a rotor, a core shaft 4 of the rotor 3 is supported by a bearing 4a so as to be freely rotatable around its axis, and the core shaft 4 has a rotor core formed by laminating a plurality of plate materials as described later. 5 and a commutator 11, which will be described later, with which the brush 1a is slidably contacted in a resilient manner are integrally provided.

The rotor core 5 is formed with first and second slots 6 and 7 around which first and second coils 8 and 9 are wound so as to be alternately adjacent to each other. That is, in each slot 6 and 7,
In the embodiment, two single-wire coils 8 and 9 each having a substantially circular cross section are arranged in a row in the inside and outside for convenience. In the case of this embodiment, the wave windings of the rear pitch 4 and the front pitch 5 are formed. It is a thing. First, the first slot 6 has a long hole shape that is long in the rotor radial direction, and the leg portion 8 of the first coil 8 is formed.
An outer diameter side insertion portion 6a and an inner diameter side insertion portion 6b, into which a and 8b are respectively inserted, are formed adjacent to each other in a row in a radial direction toward the outside.

On the other hand, the second slot 7 is set in a groove depth deeper than the first slot 6 by an amount corresponding to approximately one coil, and is formed in an array shape. That is, in the second slot 7 into which the leg portions 9a and 9b of the second coil 9 are inserted, the outer diameter side insertion portion 7a located at a position corresponding to the outer diameter side insertion portion 6a of the first slot and the first slot. The first slot inner diameter side insertion for connecting between the inner diameter side insertion portion 7b and the both insertion portions 7a and 7b, which is located on the shaft core side by the thickness of one coil approximately from the position corresponding to the inner diameter side insertion portion 6b. A narrow connecting portion 7c located at a position corresponding to the portion 6b is formed.
In addition, 10 is a tooth formed between the adjacent slots 6 and 7.

And the first and second coil legs 8 inserted and incorporated into these
The tips of a, 8b, 9a, and 9b have the corresponding insertion parts 6
a, 6b, 7a, 7b, and the protruding tip connecting portions 8c, 8d, 9c, 9d are fitted in the coil fitting groove 11b formed in the riser portion 11a formed in the commutator 11 in a flange shape. Then, the tip connecting portions 8c, 8d, 9c and 9d are integrally fixed and connected by an appropriate means such as a fusing or the like.
It is formed to have a smaller diameter than b, 9a, 9b,
The width of the coil fitting groove 11b can be reduced accordingly.

Then, in the coil fitting groove 11b, the outer diameter side insertion portion 6a,
Tip connecting portion 8 of coil leg portions 8a and 9a protruding from 7a
c and 9c and the tip connecting portions 8d and 9d of the coil leg portions 8b and 9b protruding from the inner diameter side insertion portions 6b and 7b are fitted in a row in a row in the outside in the radial direction of the rotor. The groove bottom 11c of the fitting groove 11b is set at a position corresponding to the first slot inner diameter side insertion portion 6b, that is, the groove depth of the coil fitting groove 11b is set to be substantially the same as the groove depth of the first slot inner diameter side insertion portion 6b. It is set so as to be biased toward the outer diameter side with respect to the position of the second slot inner diameter side insertion portion 7b. Further, the coil leg portion 9b protruding from the second slot inner diameter side insertion portion 7b is bent so as to expand in the outer diameter direction,
The tip connecting portion 9d is set so as to be substantially located at a position corresponding to the first slot inner diameter side insertion portion 6b, whereby the protruding position from the slot inner diameter side insertion portions 6b, 7b is displaced to the outside in the rotor radial direction. The positions of the tip connecting portions 8d and 9d of the coil leg portions 8b and 9b being aligned are aligned with the positions corresponding to the first slot inner diameter side insertion portion 6b.

Furthermore, the coil leg portions 8a, 8 which are inserted and incorporated into these
Of the portions of b, 9a, and 9b protruding from the slots 6 and 7, the coil leg portions 8b and 9b protruding from the slot inner diameter side insertion portions 6b and 7b are bent toward the arrow A side in the circumferential direction, and the slot outer diameter is formed. The coil leg portions 8a and 9a protruding from the side insertion portions 6a and 7a are bent toward the direction opposite to the arrow A in the circumferential direction and are respectively wired in a slanted manner to be located at the corresponding coil fitting groove 11b positions. Is bent again so as to face the axial direction, whereby the tip connecting portions 8c, 8d, 9
The coil fitting grooves 11b, in which c and 9d are set, are fitted in a row in the radial direction, and these legs are integrally fixed to the commutator by a housing process. Incidentally, 12
Is an insulator that insulates adjacent commutators.

In the embodiment of the present invention constructed as described above, the insertion portions (6a, 6a) of the slots 6, 7 formed in the rotor core 5 are formed.
b, 7a, 7b), the large-diameter single-wire coils 8 and 9 are inserted and incorporated in two rows inside and outside, but in that case, the inner diameters of the adjacent first and second slots 6 and 7 The side insertion portions 6b and 7b are alternately biased inward and outward in the radial direction of the rotor, and between the outer diameter inside insertion portions 7a and 7b of the second slot 7 which is set in the deep groove, A narrow connecting portion 7c is formed at a position corresponding to one slot inner diameter side insertion portion 6b. As a result, the interval (width) of the teeth between the two slots 6 and 7 can be ensured wider than that of the conventional one in which the inner diameter side insertion portion is set at the same position. By narrowing the interval, there is no problem that the output up cannot be achieved, and the mechanical strength can be surely secured.

Moreover, the second coil leg portion 9b protruding from the second slot inner diameter side insertion portion 7b located closest to the shaft core among the leg portions protruding from the rotor core 3 of the coils 8 and 9 is
The groove bottom 11c of the coil fitting groove 11b is positioned substantially at the protruding corresponding position of the first coil leg portion 8b protruding from the first slot inner diameter side insertion portion 6b so as to be expanded to the outer diameter side.
It is fitted to the side. Therefore, the coil fitting groove 11b formed in the riser portion 11a is provided with the second slot inner diameter side insertion portion 7
It is not necessary to make it deep so as to correspond to the position b, and a shallow one corresponding to the position of the first slot inner diameter side insertion portion 6b may be used, and in addition to this, the thin coil tip connection portions 8c, 8d,
It is sufficient that the groove width is narrow corresponding to 9c and 9d, and as a result, the coils 8 and 9 are formed as if the coil fitting groove were deepened corresponding to the position of the second slot inner diameter side insertion portion 7b. It is possible to effectively avoid crowding and wiring in a high-density state, which facilitates coil wiring and connection work. In addition, the gap between adjacent coil fitting grooves 11b, that is, the partition between the adjacent coil fitting portions 11b becomes wide, and the strength of the riser portion 11a is not lowered. The fear of doing so can be avoided and it becomes highly reliable. Moreover, the coils 8 and 9 are connected to the riser portion 11a, not to the portion where the thin portion is inserted into the slot insertion portion, but to the tip end connecting portions 8c, 8d, 9c and 9
Since it is d, it does not affect the motor performance.

Further, the second slot 7 is provided with insertion portions 7a, 7a on the outer and inner diameter sides.
b are separated in the radial direction, and the coil leg portions 9a, 9
b is to be inserted, but of the coil leg portions 9a and 9b which are inserted separately, the coil leg portion 9b to be inserted into the inner diameter side insertion portion 7b has a narrow connecting portion 7c on the outer diameter side. As a result, it is supported so that it does not move carelessly, and as a result, even if the rotor core 3 rotates at high speed, there is no problem that the coil leg portion 9b swings, and it is possible to make it highly reliable. .

By the way, the bending process of the leg portion projecting from the second slot inner insertion portion 7b of the second coil 9 is a two-step process of bending the outer diameter side to the circumferential direction A arrow side. It can be done, but it goes without saying that it may be done in one stroke. Further, the coil can be connected and fixed to the commutator by an appropriate means such as ultrasonic welding instead of fusing.

It should be noted that the reference numerals written in parentheses in the claims are added for convenience of understanding the contents of the present invention described in the claims, and are not limited to these reference numerals. Absent.

[Effects] In short, since the present invention is configured as described above, a single wire coil having a large diameter is inserted into each of the coil insertion portions of the slot in a row, and two single wire coils are inserted into the slot.
In that case, the inner diameter side insertion portions of the adjacent first and second slots have a structure in which the inner and outer sides are alternately biased in the radial direction of the rotor, and between the both insertion portions of the second slot set in the deep groove. As a result of the narrow connecting part corresponding to the position of the first slot inner diameter side insertion part, the tooth width between both slots is wider than that of the conventional one where the inner diameter side insertion part was set at the same position. As a result, there is no problem that the output width cannot be fulfilled due to the narrow width between the slots, and the mechanical strength can be surely secured.

Moreover, of the leg parts protruding from the rotor core of the coil,
The second coil leg portion projecting from the second slot inner diameter side insertion portion located closest to the shaft core side is bent so as to widen in the outer diameter direction, and is projected from the first slot inner diameter side insertion portion. The coil leg is positioned substantially at a position corresponding to the protrusion and fitted into the coil fitting groove. Therefore, the coil fitting groove does not have to be deep so as to correspond to the position of the second slot inner diameter side insertion portion, and it may be a shallow groove corresponding to the position of the first slot inner diameter side insertion portion. The width may be narrow corresponding to the small diameter coil tip connection part, and as a result,
It is possible to effectively avoid the fact that the coils are crowded and wired in a high-density state as in the case where the coil fitting groove is deepened corresponding to the position of the insertion part on the inner diameter side of the second slot. Will be easier. In addition, the partition between adjacent coil fitting groove parts is not widened and the strength of the riser part is not reduced, and it is also possible to avoid the possibility of damaging the insulator interposed in the partition, which is reliable. It becomes a high quality one. Moreover, since the coil has a small diameter portion not a portion to be inserted into the slot insertion portion but a tip connecting portion to be connected to the riser portion, it does not affect the motor performance.

Furthermore, the second coil will be inserted and incorporated in the outer diameter side insertion portion that is separated in the rotor radial direction of the second slot, and the coil leg portion that is inserted in the inner diameter side insertion portion will be
The narrow connecting portion on the outer side in the radial direction of the rotor supports the rotor so that it does not move to the outer diameter side carelessly. As a result, even if the rotor core rotates at high speed, the coil of the second coil There is no problem that the legs swing, and it can be made highly reliable.

[Brief description of drawings]

The drawings show an embodiment of a rotor for a rotary electric machine according to the present invention. FIG. 1 is a side sectional view of a motor, FIG. 2 is a sectional front view of a core portion, and FIG. FIG. 4 is a front view of the riser portion, FIG. 4 is a side sectional view of the coil tip portion, and FIG. 6 is a front view of the coil. . In the figure, 2 is a permanent magnet, 3 is a rotor, 5 is a rotor core, 6
Is a first slot, 6a is an outer diameter side insertion portion, 6b is an inner diameter side insertion portion, 7 is a second slot, 7a is an outer diameter side insertion portion, 7b is an inner diameter side insertion portion, 7c is a connecting portion, 8 is a first Coil, 8a,
8b is a leg portion, 8c and 8d are tip connecting portions, 9 is a second coil, 9a and 9b are leg portions, 9c and 9d are tip connecting portions, 10
Is a taste, 11 is a commutator, 11a is a riser section,
Reference numeral 11b is a coil fitting groove, and 11c is a groove bottom portion.

Claims (1)

[Claims] 1. A rotor core (5), a first coil (8) and a second coil (9) of each single wire, and a commutator (1).
1) A rotor for a rotating electrical machine, wherein the rotor core portion (5) has a first slot (6) in the shape of an elongated hole that is long in the rotor radial direction, and a narrow connecting portion (7c). Array-shaped second slot long in the radial direction (7)
Are alternately formed, and the commutator (11) has a riser portion (11a) formed to project like a flange, and the riser portion 11a has a depth substantially the same as the inner diameter side insertion portion (6b) position of the first slot. The first coil (8) has an outer diameter side insertion portion (6a or 7a) of the first or second slot and an inner diameter side insertion of the first slot. A pair of leg portions (8a, 8b) to be inserted into the portion (6b),
It has a small-diameter tip connecting portion (8c, 8d) protruding substantially linearly from each of the insertion portions (6a or 7a, 6b) and fitted to the inner and outer diameter side portions of the coil fitting groove (11b), respectively. The second coil (9) has a pair of legs (9a, 9b) and has an outer diameter side insertion portion (7a or 6a) of the first or second slot and an inner diameter side insertion portion (7b) of the second slot. ) And one of the small-diameter tip connecting portions (9c) protrudes substantially linearly from the outer diameter side insertion portion (7a or 6a) and is fitted into the outer diameter side portion of the coil fitting groove (11b). The other end portion (9d) having a small diameter is bent and protrudes from the inner diameter side insertion portion (7b) so as to widen in the outer diameter direction and protrudes to the inner diameter side of the coil fitting groove (11b). A rotor for a rotating electric machine that fits into the part.