JP2020162300A - Rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine that can prevent a terminal wire from interrupting winding of a coil.SOLUTION: A stator has a core 31 and a coil 5 formed by winding a conductor wire 50 around the core 31 with an insulator 4 interposed therebetween. The insulator 4 has a winding part 410 in which the coil 5 is arranged on one end of the core 31 in an axial direction Y, and an outer wall part 412 formed to extend in a circumferential direction Z on an outer side X1 in a radial direction X of the winding part 410. The outer wall part 412 has an introduction groove 6 that guides a terminal wire 51 to the winding part 410 from the outer side X1 in the radial direction X. The introduction groove 6 has a bottom 61 at a position away from the core 31 in the axial direction Y from the position of the winding part 410 in the axial direction Y from the outer side X1 to an inner side X2 in the radial direction X, and an inclined part 62 leading to the winding part 410 continuously from the bottom 61. A distance L between the inclined part 62 and centers Q2, Q3 of the conductor wire 50 of the second and upper layers stacked in the axial direction Y of the coil 5 is more than or equal to a distance obtained by adding a diameter D of the conductor wire 50 to a radius D/2 of the conductor wire 50.SELECTED DRAWING: Figure 4

Description

The present application relates to a rotary electric machine.

Conventionally, when connecting the terminal wire of the coil of a rotary electric machine to a lead wire, Magmate (registered trademark) may be used (see, for example, Patent Document 1).

Patent Registration No. 5460271

When a crimp terminal such as Magmate (registered trademark) is used as in the connection of a conventional rotary electric machine, or due to other factors, the bottom of the introduction groove of the terminal wire is axially separated from the lower end of the coil in the axial direction. When the terminal wire is inserted into the introduction groove and wound, the terminal wire may protrude into the winding area of the coil, and in the formation of the coil, the terminal wire and the coil come into contact with each other and the coil is formed. There was a problem that the formation of the coil was hindered.

The present application discloses a technique for solving the above-mentioned problems, and an object of the present application is to provide a rotary electric machine that suppresses the terminal wire from hindering the formation of a coil.

The rotary electric machine disclosed in the present application is
In a rotary electric machine provided with a rotor and a stator provided in an annular shape on the outer peripheral side of the rotor.
The stator has a core and a coil formed by winding a lead wire around the core via an insulator.
The insulator
A winding portion in which the coil is installed at one end in the axial direction of the core, and
It has an outer wall portion formed so as to extend in the circumferential direction on the outer side in the radial direction of the winding portion.
The outer wall portion has an introduction groove that guides the terminal wire of the lead wire from the outside in the radial direction to the winding portion.
The introduction groove is formed in the bottom portion formed from the outside to the inside in the radial direction at a position away from the core in the axial direction from the axial position of the winding portion, and the winding portion continuously from the bottom portion. It has an inclined part that leads to
The inclined portion is formed so that the distance between the inclined portion and the center of the second or more layers of the conducting wire laminated in the axial direction of the coil is equal to or greater than the distance obtained by adding the diameter of the conducting wire to the radius of the conducting wire. Is to be done.

According to the rotary electric machine disclosed in the present application, it is possible to prevent the terminal wire from interfering with the winding of the coil.

It is a figure which shows the structure of the rotary electric machine of Embodiment 1. FIG. It is an exploded perspective view which shows the structure of the intermediate body of the split core unit of the rotary electric machine shown in FIG. It is a top view of the split core unit of the rotary electric machine shown in FIG. It is sectional drawing which shows the cross section of the line AA in the winding of the split core unit shown in FIG. FIG. 5 is a cross-sectional view showing another example of the cross section of the line AA in the winding of the split core unit shown in FIG. It is a top view which shows the structure of the split core unit of the rotary electric machine of Embodiment 2 before winding. It is a figure which shows the structure of the stator of the rotary electric machine of Embodiment 3. It is a bottom view which shows the state seen from the direction of the arrow B of the stator of the rotary electric machine shown in FIG. 7. It is a top view which shows the structure of the split core unit of the stator of the rotary electric machine of Embodiment 4 before winding. It is a side view which shows the structure before winding of the split core unit of the stator of the rotary electric machine shown in FIG. It is sectional drawing which showed the structure before winding of the split core unit of the stator of the rotary electric machine of FIG.

In the following description, each direction as a rotary electric machine is shown as a circumferential direction Z, an axial direction Y, a radial direction X, an outer side X1 of the radial direction X, and an inner side X2 of the radial direction X, respectively. Therefore, in other parts as well, each direction is shown with reference to these directions, and even in the state before the configuration, each direction is shown with reference to these directions. In addition, when indicating "up" and "down" in the axial direction Y without particular notice, a plane perpendicular to the axial direction Y is assumed at the reference location, and the center point of the rotary electric machine is included with that plane as a boundary. The side to be used is "bottom" and the opposite is "top".

Embodiment 1.
FIG. 1 is a plan view showing the configuration of the rotary electric machine according to the first embodiment. FIG. 2 is an exploded perspective view showing the configuration of the intermediate body of the split core unit of the rotary electric machine shown in FIG. FIG. 3 is a plan view of the split core unit of the rotary electric machine shown in FIG. FIG. 4 is a cross-sectional view showing a cross section of the line AA in the winding of the split core unit shown in FIG. FIG. 5 is a cross-sectional view showing another example of the cross section of the line AA in the winding of the split core unit shown in FIG.

In FIG. 1, the rotary electric machine 100 has a frame 1, a rotor 2, and a stator 3. The frame 1 has a hollow cylindrical shape. The outer peripheral surface of the stator 3 is fitted to the inner peripheral surface of the frame 1. The inner peripheral surface of the stator 3 and the outer peripheral surface of the rotor 2 are arranged so as to face each other. A plurality of magnets 21 are installed on the outer peripheral surface of the rotor 2. The rotor 2 is rotatably supported with respect to the stator 3 by bearings (not shown). The stator 3 is configured by arranging 12 divided core units 30 in an annular shape. The number of divided core units 30 is not limited to 12.

As shown in FIGS. 1 and 2, the split core unit 30 has a split core 31, a coil 5, and an insulator 4. The split core 31 is formed by laminating steel plates in the same direction as the axial direction Y. The insulator 4 electrically insulates the split core 31 and the coil 5.

As shown in FIG. 2, the split core 31 has a yoke portion 32 having an arcuate outer circumference, a teeth portion 33 projecting from the yoke portion 32 to the inside X2 in the radial direction X, and an inner side X2 of the teeth portion 33 in the radial direction X. It has shoe portions 35 protruding from the tip 34 on both sides in the circumferential direction Z. The insulator 4 includes a first insulator portion 41 installed at one end in the axial direction Y, a second insulator portion 42 installed at the other end in the axial direction Y, and both ends of the teeth portion 33 of the split core 31 in the circumferential direction Z. Each of the above is provided with a third insulator portion 43 and a fourth insulator portion 44 formed so as to extend in the axial direction Y.

For example, the first insulator portion 41 and the second insulator portion 42 may be formed of a resin molded body, and the third insulator portion 43 and the fourth insulator portion 44 may be formed of an insulating sheet. Then, with these insulators 41 to 44 installed on the split core 31, the lead wire 50 is wound to form the coil 5.

As shown in FIGS. 2 and 4, the first insulator portion 41 includes a winding portion 410, an inner wall portion 411, and an outer wall portion 412. A coil 5 is installed at one end of the winding portion 410 in the axial direction Y of the split core 31. The inner wall portion 411 is formed so as to extend in the circumferential direction Z of the inner side X2 of the winding portion 410 in the radial direction X. The outer wall portion 412 is formed so as to extend in the circumferential direction Z of the outer side X1 of the winding portion 410 in the radial direction X. The inner wall portion 411 and the outer wall portion 412 are formed in connection with the winding portion 410, respectively.

The inner wall portion 411 and the outer wall portion 412 prevent the coil 5 installed in the winding portion 410 from collapsing in the inner X2 and the outer X1 in the radial direction X, respectively. Here, assuming that the position H0 in the axial direction Y of the winding portion 410, the length HD in the axial direction Y of the inner wall portion 411 and the length HC in the axial direction Y of the outer wall portion 412 are the axial directions Y of the winding portion 410. It is formed so as to extend from the position H0 to the side away from the split core 31 in the axial direction Y, that is, to a position above the axial direction Y.

Further, the length HD of the inner wall portion 411 and the length HC of the outer wall portion 412 are generally formed longer in the length HC of the outer wall portion 412 than in the length HD of the inner wall portion 411. , Not limited to this. That is, for example, the length HD of the inner wall portion 411 and the length HC of the outer wall portion 412 may be formed to have the same length, and the length HD of the inner wall portion 411 may be larger than the length HC of the outer wall portion 412. It may be formed long.

The outer wall portion 412 has an introduction groove 6 for guiding the terminal wire 51 of the lead wire 50 (indicated by a dotted line in FIG. 4) from the outer side X1 in the radial direction X to the winding portion 410, and the introduction groove 6. It has a cavity 65 for inserting a crimp terminal 8 (in FIG. 4, a position indicated by a dotted line in FIG. 4) formed of, for example, Magmate (registered trademark) on the axial direction Y. Since the crimp terminal 8 has various shapes, only the arrangement position thereof is shown in the figure. As shown in FIG. 4, the introduction groove 6 is located at a position away from the split core 31 in the axial direction Y from the position H0 of the winding portion 410 in the axial direction Y from the outer side X1 to the inner side X2 in the radial direction X, that is, the shaft. It has a bottom portion 61 formed on the upper side in the direction Y, and an inclined portion 62 continuously extending from the bottom portion 61 to the winding portion 410.

In the inclined portion 62, the distance L between the inclined portion 62 and the centers Q2 and Q3 of the second and higher layers of the conducting wires 50 laminated in the axial direction Y of the coil 5 is the radius D / 2 of the guiding wires 50 and the diameter of the conducting wires 50. It is formed at a distance greater than or equal to the sum of D. The bottom 61 of the introduction groove 6 has a notch 63 in the axial direction Y, and the terminal wire 51 installed in the bottom 61 and the terminal wire 52 described later are inserted into the notch 63 via the cavity 65. It is sandwiched by the crimp terminal 8. In this way, the cavity 65 functions as a guide for inserting the crimp terminal 8.

Next, the position HB of the bottom portion 61 of the introduction groove 6 in the axial direction Y will be described with reference to FIG. First, in FIG. 4, the position H0 in the axial direction Y of the winding portion 410 is used as a reference. The axial position of the first layer of the coil 5 in the axial direction Y is HA, and this length HA corresponds to the diameter D of the lead wire 50. The position HB of the bottom portion 61 of the introduction groove 6 in the axial direction Y is above the position H0 of the winding portion 410 in the axial direction Y, and further, one layer in the axial direction Y of the coil 5. It is above the axial position HA of the eye in the axial direction Y. As a result, it becomes easy to secure the length of the notch 63 in the axial direction Y with respect to the mounting of the crimp terminal 8, and the crimp terminal 8 can be easily and reliably installed.

Further, the position HB of the bottom portion 61 of the introduction groove 6 in the axial direction Y is formed at a position away from the split core 31 in the axial direction Y from the position of the maximum stacking of the coils 5 in the axial direction Y. As a result, the introduction groove 6 connects the terminal wire 52 ((in FIG. 4 shows the position indicated by the dotted line) at the other end, which is the end of the winding of the lead wire 50 around which the coil 5 is wound, to the winding portion 410. Can be guided to the outer side X1 in the radial direction X from.

That is, since the position HB in the axial direction Y of the bottom portion 61 of the introduction groove 6 is formed at a position away from the split core 31 in the axial direction Y from the position of the maximum stacking in the axial direction Y of the coil 5, the coil 5 The terminal wire 52 at the other end, which is the end of winding, can be inserted into the introduction groove 6 without being unnecessarily bent.

Here, the distance W in the radial direction X of the inclined portion 62 of the outer wall portion 412 will be described. Generally, in order to wind the coil 5 densely, it is effective to stack the lead wires 50 in the shape of a bale shown in FIG. 4 to form the coil 5. In this case, the lead wire 50 adjacent to the outer wall portion 412 of the third layer in the axial direction Y of the coil 5 is the lead wire 50 closest to the inclined portion 62. The distance L [mm] between the center Q3 of the lead wire 50 of the third layer of the coil 5 and the inclined portion 62 is represented by the following (Equation 1).

If the distance L is equal to or greater than the radius D / 2 of the lead wire 50 plus the diameter D of the lead wire 50, the terminal wire 51 and the coil 5 do not come into contact with each other. The minimum distance Wmin, which is the distance W, is obtained by the following (Equation 2).

The distance W in the radial direction X of the inclined portion 62 of the first embodiment configured as described above has a minimum distance Wmin as a lower limit value in order to avoid contact between the terminal wire 51 and the lead wire 50 constituting the coil 5. It is configured as the setting (W ≧ Wmin). That is, from the state in which the terminal wire 51 is inserted into the introduction groove 6, the terminal wire 51 is introduced into the winding portion 410 through the inclined portion 62, and when the coil 5 is wound, of the terminal wire 51 and the coil 5. The lead wire 50 of the third layer coil 5 arranged closest to the terminal wire 51 is separated by the inclined portion 62 at least the distance obtained by adding the radius D / 2 of the lead wire 50 of the coil 5 and the diameter D of the lead wire 50. Since it is formed, contact between the terminal wire 51 and the coil 5 can be avoided.

In the first embodiment, an example in which the inclined portion 62 of the introduction groove 6 is formed on a flat surface is shown, but the present invention is not limited to this, and for example, as shown in FIG. 5, the inclined portion 64 of the introduction groove 6 is formed. It is also possible to form a curved surface. The relationship between the inclined portion 64 and the centers Q2 and Q3 of the second and higher conductor wires 50 of the coil 5 is set in the same manner as shown above.

According to the rotary electric machine of the first embodiment configured as described above,
In a rotary electric machine provided with a rotor and a stator provided in an annular shape on the outer peripheral side of the rotor.
The stator has a core and a coil formed by winding a lead wire around the core via an insulator.
The insulator
A winding portion in which the coil is installed at one end in the axial direction of the core, and
It has an outer wall portion formed so as to extend in the circumferential direction on the outer side in the radial direction of the winding portion.
The outer wall portion has an introduction groove that guides the terminal wire of the lead wire from the outside in the radial direction to the winding portion.
The introduction groove is formed in the bottom portion formed from the outside to the inside in the radial direction at a position away from the core in the axial direction from the axial position of the winding portion, and the winding portion continuously from the bottom portion. It has an inclined part that leads to
The inclined portion is formed so that the distance between the inclined portion and the center of the second or more layers of the conducting wire laminated in the axial direction of the coil is equal to or greater than the distance obtained by adding the diameter of the conducting wire to the radius of the conducting wire. Because it was done
Even if the terminal wire is introduced and wound at the bottom of the introduction groove formed at a position away from the core in the axial direction from the winding portion, the inclined portion of the introduction groove prevents the terminal wire from blocking the winding of the coil. Can be suppressed. Therefore, it is possible to avoid the unwinding caused by the contact between the lead wire wound around the winding portion and the terminal wire. That is, high-precision aligned winding can be realized, so that the motor efficiency is improved.
Further, since the coil and the terminal wire do not come into contact with each other, the winding speed can be increased and the productivity is improved.

In addition, the axial position of the bottom of the introduction groove is
Since it was formed at a position distant from the core in the axial direction from the axial position of the first layer around which the coil is wound,
It becomes easier to install crimp terminals on the outer wall.

In addition, the axial position of the bottom of the introduction groove is
It is formed from the position of the maximum stacking of the coils in the axial direction to the position away from the core in the axial direction.
Since the introduction groove guides the terminal wire at the other end of the lead wire from the winding portion to the outside in the radial direction,
The terminal wire at the other end can be inserted into the introduction groove, and the part where the terminal wire at one end and the terminal wire at the other end are engaged can be shared by the introduction groove, which saves space. Can be miniaturized.

Further, the bottom portion of the introduction groove of the outer wall portion has a notch portion in the axial direction.
Since the terminal wire installed on the bottom portion is sandwiched by the crimp terminal inserted into the notch portion,
Crimping terminals can be easily installed.

Embodiment 2.
FIG. 6 is a plan view showing the configuration of the split core unit of the rotary electric machine according to the second embodiment before winding. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The position R1 of the bottom portion 61 of the introduction groove 6 in the circumferential direction Z is formed at a position inside the end portion 413 of the winding portion 410 in the circumferential direction Z. Further, the position of the end portion 621 of the inclined portion 62 of the introduction groove 6 in the circumferential direction Z is formed at a position outside the end portion 413 of the winding portion 410 in the circumferential direction Z.

When the introduction groove 6 is formed in this way, when the terminal wire 51 is inserted into the introduction groove 6 and the coil 5 is wound, the terminal wire 51 is pressed against the end portion 621 of the introduction groove 6 and wound. Therefore, when the lead wire 50 is wound at the position of the second layer of the coil 5, the coil 5 of the first layer does not move from a predetermined position due to the winding tension of the lead wire 50. Therefore, the second layer coil 5 can be wound at a predetermined position, and the winding disorder can be further suppressed. Further, since the width of the inclined portion 62 in the circumferential direction Z is increased by the end portion 621 of the inclined portion 62, it can be particularly applied to the conducting wires 50 having a plurality of types of diameter D.

According to the rotary electric machine of the second embodiment configured as described above, it goes without saying that the same effect as that of the first embodiment is obtained.
The position of the bottom of the introduction groove in the circumferential direction is
It is formed at a position inside the end of the winding portion in the circumferential direction.
The position of the circumferential end of the inclined portion of the introduction groove is
Since it was formed at a position outside the circumferential end of the winding portion,
Since the lead wire is wound along the circumferential end of the inclined portion of the introduction groove to form a coil, highly accurate aligned winding can be realized, and motor efficiency and productivity are further improved. In particular, it can be applied to conductors of multiple diameters.

Embodiment 3.
FIG. 7 is a diagram showing a configuration of a stator of a rotary electric machine according to a third embodiment. FIG. 8 is a bottom view showing a state of the stator of the rotary electric machine shown in FIG. 7 as viewed from the direction of arrow B. In the figure, the same parts as those in each of the above embodiments are designated by the same reference numerals, and the description thereof will be omitted. In the third embodiment, the lead wire 50 is continuously wound around the two adjacent split cores 31 in the circumferential direction Z, and the crossover wire 53 is formed from the lead wire 50 connecting the coils 5 of the plurality of split cores 31. The case will be described.

Since the introduction groove 6 in which the terminal line 51 of the split core 31 is arranged is formed in the first insulator portion 41, here, it extends over the second insulator portion 42 of the insulator 4 at the other end on the opposite side in the axial direction Y. Line 53 is arranged (see FIG. 8).

By winding the two divided cores 31 continuously, the number of connection points is reduced, and the terminal wire 51 at one end and the terminal wire 52 at the other end are shared by the introduction groove 6 of each first insulator portion 41. It can be arranged and the number of crimp terminals can be reduced. Further, as in the case of the first embodiment, the position of the bottom portion 61 of the introduction groove 6 in the axial direction Y is separated from the split core 31 in the axial direction Y from the position of the maximum stacking of the coil 5 in the axial direction Y. Since it is formed up to the position (see FIG. 4), the terminal wire 52 at the other end can be inserted into the introduction groove 6 without being unnecessarily bent.

Since the crossover 53 of the split core unit 30 is arranged in the second insulator portion 42 of the insulator 4, it is not necessary to arrange the cavity 65 formed in the first insulator portion 41 on the outer side X1 in the radial direction X. Therefore, the arrangement space of the crossover wire 53 is omitted on the first insulator portion 41 side of the insulator 4, and the coil 5 in which the diameter D of the lead wire 50 is thickened for miniaturization and high output of the rotary electric machine 100 is continuously provided. Both windings can be compatible.

In this way, even if the diameter D of the lead wire 50 of the coil 5 is increased and the crimp terminal that is increased in size is used, the size of the split core unit 30 in the radial direction X can be suppressed. 100 compact and high output can be achieved. In the third embodiment, an example in which the two divided cores 31 are continuously wound is shown, but the present invention is not limited to this, and the number of continuously wound divided cores 31 is three or more. The split core 31 may be wound continuously.

According to the rotary electric machine of the third embodiment configured as described above, it goes without saying that the same effect as that of each of the above embodiments is obtained.
The lead wire is continuously wound around the plurality of cores in the circumferential direction, and the crossover wire formed from the lead wire connecting the plurality of cores is one end in the axial direction in which the terminal wire of the core is arranged. Since it was placed on the insulator at the other end on the opposite side in the axial direction,
Since the crossover is arranged at the insulator at the other end on the opposite side of the introduction groove in the axial direction, the space for the crossover of the insulator on the introduction groove side can be omitted, and the rotary electric machine can be made smaller and have higher output. it can.

Embodiment 4.
FIG. 9 is a plan view showing the configuration of the split core unit of the stator of the rotary electric machine according to the fourth embodiment before winding. FIG. 10 is a side view showing the configuration of the split core unit of the stator of the rotary electric machine shown in FIG. 9 before winding. FIG. 11 is a cross-sectional view showing the configuration of the split core unit of the stator of the rotary electric machine of FIG. 10 before winding. In the figure, the same parts as those in each of the above embodiments are designated by the same reference numerals, and the description thereof will be omitted. The first insulator portion 41 has a length of one side wall portion 72 in the axial direction Y in a pair of side wall portions 71, 72 (see FIG. 10) of the outer side X1 in the radial direction X forming the introduction groove 6 of the outer wall portion 412. The HE is formed shorter than the length HF of the other side wall portion 71 in the axial direction Y.

The winding method of the split core unit 30 constituting the stator 3 of the rotary electric machine 100 of the fourth embodiment configured as described above will be described. First, the lead wire 50 to be the terminal wire 51 is pulled out from the winding nozzle, and the lead wire 50 is gripped by the gripping jig 9 at a position R2 (see FIG. 11) above the upper surface of the cavity 65. Next, the gripping jig 9 is moved to the split core 31 side in the axial direction Y to the position R4 where the side wall portion 72 and the terminal line 51 do not interfere with each other and the position at the angle θ in FIG. 11, and the terminal line 51 is moved along the inclined portion 62. Let me. Next, the gripping jig 9 is moved in the circumferential direction Z so as to be at the position R3 where the terminal wire 51 is inserted into the introduction groove 6.

At this time, the terminal wire 51 is not inserted over the entire length in the radial direction X of the introduction groove 6, but is inserted into a part of the introduction groove 6. Further, while moving the gripping jig 9 in the circumferential direction Z so that the terminal wire 51 abuts on the side wall portion 71, the gripping jig 9 is further moved toward the split core 31 side in the axial direction Y to introduce the terminal wire 51 into the introduction groove 6. Insert in. Next, the winding nozzle is circulated around the split core 31 to wind the coil 5 around the winding portion 410.

Therefore, since the length HE of the side wall portion 72 is shorter than the length HF of the side wall portion 71, the gripping jig 9 is sufficiently moved to the split core 31 side in the axial direction Y until the position where the terminal wire 51 is inserted into the introduction groove 6. it can. Then, since the terminal wire 51 can be hooked on the side wall portion 71 and bent to be inserted into the introduction groove 6, the positioning accuracy of the terminal wire 51 can be improved. Further, since the terminal wire 51 can be bent along the slope of the inclined portion 62, the terminal wire 51 does not protrude into the winding region of the coil 5, and the terminal wire 51 is wound in contact with the lead wire 50 constituting the coil 5. It is possible to suppress obstruction of the line.

According to the rotary electric machine of the fourth embodiment configured as described above, it goes without saying that the same effect as that of each of the above embodiments is obtained.
The pair of radial outer side wall portions forming the introduction groove of the outer wall portion are formed so that the axial length of one of the side wall portions is shorter than the axial length of the other side wall portion. Therefore, it is possible to realize more accurate aligned winding of coils and improve motor efficiency.

In each of the above embodiments, an example of a divided core unit formed by being divided in the circumferential direction is shown, but the present invention is not limited to this, and the core is connected in the circumferential direction, for example, a joint wrap core. Even if there is, it can be formed in the same way.

Although the present disclosure describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 frame, 100 rotary electric machine, 2 rotors, 3 stators,
30 split core unit, 31 split core, 32 yoke part, 33 teeth part,
34 tip, 35 shoe part, 4 insulators, 41 first insulator part,
410 Winding part, 411 Inner wall part, 412 Outer wall part, 413 End part,
42 2nd insulator part, 43 3rd insulator part,
44 4th insulator, 5 coils, 50 leads, 51 terminal lines, 52 terminal lines, 53 crossovers, 6 introduction grooves, 61 bottoms, 62 slopes, 621 ends,
63 Notch, 64 Inclined, 65 Cavity, 8 Crimping Terminal, 9 Gripping Jig,
θ angle, D diameter, H0 position, HA position, HB position, HC length, HD length, HE length, HF length, L distance, Q2 center, Q3 center, R1 position,
R2 position, R3 position, R4 position, W distance, X radial direction, X1 outside,
Inside X2, Y-axis direction, Z-circumferential direction.

Claims (7)

In a rotary electric machine provided with a rotor and a stator provided in an annular shape on the outer peripheral side of the rotor.
The stator has a core and a coil formed by winding a lead wire around the core via an insulator.
The insulator
A winding portion in which the coil is installed at one end in the axial direction of the core, and
It has an outer wall portion formed so as to extend in the circumferential direction on the outer side in the radial direction of the winding portion.
The outer wall portion has an introduction groove that guides the terminal wire of the lead wire from the outside in the radial direction to the winding portion.
The introduction groove is formed in the bottom portion formed from the outside to the inside in the radial direction at a position away from the core in the axial direction from the axial position of the winding portion, and the winding portion continuously from the bottom portion. It has an inclined part that leads to
The inclined portion is formed so that the distance between the inclined portion and the center of the second or more layers of the conducting wire laminated in the axial direction of the coil is equal to or greater than the distance obtained by adding the diameter of the conducting wire to the radius of the conducting wire. Rotating electric machine. The axial position of the bottom of the introduction groove is
The rotary electric machine according to claim 1, which is formed at a position away from the core in the axial direction from the axial position of the first layer around which the coil is wound. The position of the bottom of the introduction groove in the circumferential direction is
It is formed at a position inside the end of the winding portion in the circumferential direction.
The position of the circumferential end of the inclined portion of the introduction groove is
The rotary electric machine according to claim 1 or 2, wherein the winding portion is formed at a position outside the peripheral end portion in the circumferential direction. The axial position of the bottom of the introduction groove is
It is formed from the position of the maximum stacking of the coils in the axial direction to the position away from the core in the axial direction.
The rotary electric machine according to any one of claims 1 to 3, wherein the introduction groove guides the terminal wire at the other end of the lead wire to the outside in the radial direction from the winding portion. The pair of radial outer side wall portions forming the introduction groove of the outer wall portion are formed so that the axial length of one of the side wall portions is shorter than the axial length of the other side wall portion. The rotary electric machine according to any one of claims 1 to 4. The lead wire is continuously wound around the plurality of cores in the circumferential direction, and the crossing wire formed from the lead wire connecting the plurality of cores is one end in the axial direction in which the terminal wire of the core is arranged. The rotary electric machine according to any one of claims 1 to 5, which is arranged on the insulator at the other end on the opposite side in the axial direction. The bottom portion of the introduction groove of the outer wall portion has a notch in the axial direction.
The rotary electric machine according to any one of claims 1 to 6, wherein the terminal wire installed on the bottom portion is sandwiched by a crimp terminal inserted into the notch portion.

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