JP5523058B2 - Insulator for stator and rotating electric machine using the same - Google Patents

Description

  The present invention relates to a stator insulator that is mounted on an outer surface of a stator iron core to insulate a coil from the stator iron core, and a rotating electrical machine that uses the same.

  A rotary electric machine such as a starter generator of a vehicle is provided with a position detection sensor that detects the rotational position of the rotor, and controls the commutation timing of the three-phase coil based on the detection signal detected by the position detection sensor. It has become.

As this type of rotating electrical machine, one that directly detects the rotational position of a rotor using a driving magnet provided in the rotor is known (for example, see Patent Document 1).
In the rotating electrical machine described in Patent Document 1, the cylindrical wall of the rotor is rotatably arranged on the outer peripheral side of the stator, and the magnet is arranged so that different magnetic poles are alternately arranged on the inner periphery of the cylindrical wall of the rotor. In addition, a driving coil and a position detection sensor are attached to the stator.
The stator core of the stator is provided with a plurality of teeth portions radially, and a coil is wound around the outer periphery of each tooth portion via an insulator, and at the tip of each tooth portion is stretched in a T shape on both sides in the circumferential direction. The nail piece to be taken out is provided integrally. Each claw piece is opposed to the inner peripheral surface (magnet) of the rotor in a close state, and magnetic flux is input to and output from the magnet.
In the position detection sensor, a plurality of sensor elements and a circuit board are accommodated in a sensor case, and sensor elements respectively corresponding to a plurality of detection legs projecting from the sensor case are held. The claw piece of the specific tooth portion of the stator core is provided with a notch portion from one end in the axial direction toward the center side, and a leg portion for detection of the position detection sensor is inserted and disposed in each notch portion. ing. Accordingly, the sensor elements (detection leg portions) disposed between the teeth portions in this way face the magnets on the inner periphery of the rotor in a close state.

  Further, the insulator attached to the outer surface of the teeth portion of the stator core has a two-part structure composed of an insulator member that covers the stator core from one end side in the axial direction and an insulator member that covers the stator core from the other end side in the axial direction. ing. Both insulator members are formed in a shape that bisects the outer shape of the stator core in the axial direction, and all axial lengths of the portions covering the tooth portions of the respective insulator members are the same length.

  Each insulator member is attached so as to wrap around the peripheral area from the general part (radially extending part) of the tooth part to the claw piece, but on the one end side in the axial direction of the claw piece of the specific tooth part. Since the notch portion is provided, the shape of one insulator member corresponding to the notch portion is different from the other insulator member. That is, the part covering the peripheral area of each tooth part of both insulator members is the side of the tooth part from the back side of the claw piece of the tooth part at the tip of the U-shaped area covering the substantially half of the general part of the tooth part in the axial direction. Although the flange part covering is extended, the claw piece of the specific tooth part has different outer shapes on one end side in the axial direction with the notch part and on the other end side in the axial direction without the notch part, The shape of the flange portion corresponding to this portion is different between the one on the one insulator member side and the one on the other insulator member side. Specifically, the flange portion on the other insulator member side protrudes to a substantially constant width in the circumferential direction, whereas the flange portion of one insulator member follows the shape of the notch portion of the specific tooth portion. The overhang width changes in steps.

JP 2009-89588 A

However, in the conventional insulator used for the rotating electrical machine described above, since the overhang width of the flange portion corresponding to the specific tooth portion of one insulator member changes in a stepped shape, the flange portion has an axial center side. There is a concern that a region that bulges sideways is formed on the side, and that the bulged region of the flange portion is drawn into the coil and wound up when the coil is wound around the tooth portion.
In particular, in the flange part with a notch of one insulator member, the shape retention characteristic becomes low at one end side in the axial direction due to the notch, and when one insulator member is attached to a specific tooth part, The part side (axial center side) tends to open more widely on the side. In relation to this, the conventional insulator is likely to be pulled inward by the coil when the coil is wound.

  Accordingly, the invention of this application is to provide an insulator for a stator that can prevent the end edge of an insulator member from being pulled in when a coil is wound, and a rotating electrical machine using the same.

The invention according to claim 1, which solves the above problem, includes a stator core provided with a plurality of teeth portions radially, and a coil wound around each of the tooth portions. A claw piece projecting in a substantially T shape is provided at both ends in the circumferential direction at the distal end portion, and a leg portion for detection of a position detection sensor is provided on the claw piece of the specific tooth portion among the plurality of tooth portions of the stator core. Is used in a stator of a rotating electrical machine in which a notch portion in which an insertion is arranged is formed from one end side in the axial direction toward the center side, and is mounted on the outer surface of the stator iron core and between the stator iron core and the coil. A stator insulator to be insulated, the first insulator member covering the outer surface of the plurality of tooth portions from one end side in the axial direction where the notch portion of the stator core is provided, and the stator iron And a second insulator member covering the outer surface of the plurality of tooth portions from the other end side in the axial direction of the first insulator member, and the claw piece of the specific teeth portion of the first insulator member is cut The axial length of the portion covering the side with the notch is set shorter than the axial length of the portion covering the corresponding side of the specific teeth portion of the second insulator member , and the first insulator member An outwardly extending bent piece along the bottom of the notched portion of the specific tooth portion is provided at the axially extending end of the portion covering the side where the notched portion of the specific tooth portion is located, and the tip end portion of the bent piece Is abutted against the second insulator member on the extension of the notch .
As a result, the first insulator member is attached to the outer surface of the stator core from one end side in the axial direction, and when the coil is wound, the force that opens the distal end side outward in the region covering the specific tooth portion of the first insulator member. The axial length of the portion covering the specific tooth portion of the first insulator member is set to be shorter than the axial length of the portion covering the specific tooth portion of the second insulator member even when Thus, the opening amount of the first insulator member on the tip end side in the axial direction can be kept small. For this reason, the bulging amount to the side of the front end side edge portion of the first insulator member is suppressed.
In addition, the axially extending end of the first insulator member abuts on the second insulator member by the bent piece, and the generation of a gap between the first insulator member and the second insulator member is suppressed.

According to a second aspect of the present invention, there is provided a rotating electric machine using the stator insulator according to the first aspect.

  According to the invention of this application, since the axial length of the portion covering the side with the notch portion of the claw piece of the first insulator member is set shorter than that of the corresponding portion on the second insulator member side, The opening amount of the tip in the axial direction on the first insulator member side is suppressed, and as a result, it is possible to prevent the end edge of the insulator member from being pulled in during coil winding.

Furthermore, according to the present invention, since the extending end of the first insulator member in the axial direction comes into contact with the second insulator member by the bent piece, both insulators are prevented from being pulled in the edge of the insulator member. Generation | occurrence | production of the clearance gap between members can be suppressed.

It is a perspective view of the rotary electric machine of one Embodiment of this invention. It is sectional drawing corresponding to the AA cross section of FIG. 1 of the rotary electric machine of one Embodiment of this invention. It is the top view which showed the rotary electric machine of one Embodiment of this invention by making a rotor part into a cross section. It is an exploded top view of the stator and position detection sensor of one embodiment of this invention. It is a perspective view of the stator iron core of one Embodiment of this invention. It is a perspective view of the insulator of one embodiment of this invention. 1 is an exploded plan view of a stator iron core and an insulator according to an embodiment of the present invention. It is an expanded view of the inner peripheral side of the rotor of one Embodiment of this invention. It is a rear view of the position detection sensor of one Embodiment of this invention. It is the perspective view which looked at the position detection sensor of one Embodiment of this invention from the back side. It is the perspective view which looked at the position detection sensor of one Embodiment of this invention from the front side. It is a disassembled perspective view of the position detection sensor of one Embodiment of this invention. It is an exploded top view of a part of stator iron core and insulator of one embodiment of this invention. It is a top view of a part of stator of one embodiment of this invention. It is a timing chart which shows the detection state of each sensor element of the position detection sensor of one embodiment of this invention, and the output waveform of each phase of U, V, and W.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 3 show a rotating electrical machine 1 of this embodiment used as a starter generator for a vehicle engine. The rotating electrical machine 1 is a three-phase brushless rotating electrical machine, and includes a stator 2 fixed to an engine block (not shown), a rotor 4 fixed to an engine crankshaft (not shown), and the rotor 4. And a position detection sensor 6 for detecting the rotational position of the motor.

  FIG. 4 shows the assembled state of the stator 2 and the position detection sensor 6, and FIGS. 5 to 7 show the components of the stator 2. As shown in these drawings, the stator 2 includes a stator iron core 2A formed by laminating electromagnetic steel plates and a plurality of coils 10 wound around the stator iron core 2A. As shown in FIG. 5, the stator core 2 </ b> A includes a main body 2 a formed in an annular shape, and a plurality of teeth 2 b that project radially outward from the outer peripheral surface of the main body 2 a. In addition, claw pieces 3 projecting in a substantially T shape are provided on both ends in the circumferential direction at the tip of each tooth portion 2b. An insulator 110 is attached to the outer surface of the stator core 2A so as to cover the peripheral region of each tooth portion 2b, and the coil 10 is wound around the peripheral region of each tooth portion 2b via the insulator 110. It has become. The insulator 110 will be described in detail later.

As shown in FIG. 2, the rotor 4 includes a bottomed cylindrical yoke 12 made of a magnetic material, and a boss portion 14 that is coaxially fixed to the bottom wall 12 a of the yoke 12. The crankshaft of the engine is coupled so as to be integrally rotatable.
FIG. 8 shows the inner peripheral side of the rotor 4 expanded. As shown in the figure, a plurality of magnets 16 are attached to the inner peripheral surface of the rotor 4 at equal intervals along the circumferential direction. Each of these magnets 16 is formed in a rectangular shape that is long in the axial direction of the rotor 4, and except for one, the other surface (inner surface) facing the center of the rotor 4 is either an N pole or an S pole. Crab is magnetized. One magnet 16c has a short secondary magnetic pole portion 160 whose inner surface is magnetized to the S pole on one end side (one end side in the longitudinal direction) of the main magnetic pole portion 162 whose inner surface is magnetized to the N pole. Are joined.

  Here, in FIG. 8, the magnet 16 a having the entire inner side surface magnetized to the N pole, the magnet 16 a, the magnet 16 having the entire inner surface magnetized to the S pole, the magnet 16 b, the main magnetic pole portion 160 and the sub magnetic pole Assuming that the magnet 16 provided with the portion 162 is called a magnet 16c, in the rotor 4, the magnet 16c is disposed between a specific pair of adjacent magnets 16a, 16a, and between the other adjacent magnets 16a, 16a. A magnet 16b is disposed on the surface. Therefore, on the inner peripheral side of the rotor 4, N poles and S poles appear alternately except at one end side in the axial direction (upper end side in FIG. 8), and before and after the sub magnetic pole portion 160 of the magnet 16 c at one end side in the axial direction ( N poles appear continuously for three magnets only (before and after in the circumferential direction). As will be described in detail later, the region on one end side in the axial direction of the magnet 16 is used as a target for detecting the ignition timing of the engine, and the remaining region in the axial direction of the magnet 16 is mainly used for the coil 10. Used as a target for detecting commutation timing.

  Further, the coil 10 wound around the tooth portion 2b of the stator core 2A is pulled out of the stator 2 and connected to a control device (not shown). The control device rotates the rotor 4 and the crankshaft by controlling the energization of the coil 10 at a predetermined timing when the engine is started. After the engine is started, the power generated by the rotation of the rotor 4 is charged in a battery (not shown). Or for direct use. In FIG. 1, 100b is a lead wire connected to the coil 10, and 102b is a protective tube for bundling a plurality of lead wires 100b and covering them. Further, reference numeral 102a in the figure denotes a protective tube that bundles lead wires 100a (see FIG. 9) drawn from a sensor case 60 described later and covers the periphery thereof.

  By the way, the shape of the claw piece 3 of each tooth part 2b is not a fixed shape, and as shown in FIG. 5, the claw piece 3 of some of the tooth parts 2b is directed from one end side in the axial direction toward the central side in the axial direction. A notch 7 is provided. Specifically, the notch 7 is formed so as to form a substantially rectangular fitting groove across two claw pieces 3 adjacent in the circumferential direction, and the notch that forms the fitting groove. Seven pairs are arranged in a total of four locations in the circumferential direction. Hereinafter, the five tooth portions 2b in which the notch portions 7 are formed in the claw piece 3 are referred to as specific tooth portions 2B in order to distinguish them from the other tooth portions 2b. Sensor holding legs 80a, 80b, 80c, and 80d (see FIG. 4) of the position detection sensor 6, which will be described later, are inserted and disposed in pairs of the notches 7 formed in the adjacent specific teeth 2B. It is like that.

The first, second, third and fourth Hall ICs (sensor elements) 50a, 50b, 50c and 50d shown in FIG. 8 are accommodated in the leg portions 80a, 80b, 80c and 80d of the position detection sensor 6, respectively. ing. These Hall ICs 50a, 50b, 50c, 50d are opposed to the inner peripheral surface of the rotor 4 and detect the switching of the magnetic flux of the magnet 16.
Here, of the Hall ICs 50a, 50b, 50c, 50d disposed in the leg portions 80a, 80b, 80c, 80d, the first Hall IC 50a and the second, third, and fourth Hall ICs 50b, 50c, 50d As shown in FIG. 8, the first Hall IC 50a is disposed at a position M1 facing one end side of the inner peripheral surface of the rotor 4 in the axial direction, and the second, third, and fourth Hall IC 50b. , 50c, 50d are disposed at a position M2 facing the central side in the axial direction of the inner peripheral surface of the rotor 4. As a result, the first Hall IC 50a detects the switching of the magnetic flux of the magnets 16a, 16b, and 16c at a height passing through the sub magnetic pole part 160 of the magnet 16c, and the second, third, and fourth Hall ICs 50b, 50c, and 50d are The switching of the magnetic flux of the magnets 16a, 16b, 16c is detected at the height passing through the main magnetic pole part 162 of the magnet 16c.

  The second, third, and fourth Hall ICs 50b, 50c, and 50d output the signal detected at the position M2 on the center side of the rotor 4 to the control device as the rotational position signal of the rotor 4, and the first Hall IC 50a 4 is output to the control device as an absolute position information signal on the circumference of the rotor 4. The control device receives the output signals of the second, third, and fourth Hall ICs 50b, 50c, and 50d, controls the commutation timing for the three-phase coil 10, and outputs the output signals of the first Hall IC 50a and the second and second Hall ICs 50b, 50c, and 50d. The engine ignition timing is controlled in response to the output signals of the third and fourth Hall ICs 50b, 50c and 50d.

FIG. 15 is a timing in which signals generated by the control device according to the outputs of the Hall ICs 50a, 50b, 50c, and 50d and voltage waveforms output to the coils 10 of the U, V, and W phases are described. It is a chart.
In the figure, S2, S3 and S4 indicate pulse signals generated corresponding to the outputs of the second, third and fourth Hall ICs 50b, 50c and 50d, and S1 indicates the output of the first Hall IC 50a. Sv, Sw, and Su represent the output voltage waveforms of the V-phase, W-phase, and U-phase, respectively. In the figure, T1 is the timing at which the output (S4) of the fourth Hall IC 50d switches from high to low while the output (S1) of the first Hall IC 50a remains in the high state, and T2 is the output of the first Hall IC 50a. The timing at which the output (S4) of the fourth Hall IC 50d switches from low to high while (S1) remains in the high state, T3 is the third timing after the timing T1 and the output (S1) of the first Hall IC 50a remains in the high state. This is the timing at which the output (S3) of the Hall IC 50c switches from low to high. In the control device, timings T1, T2, and T3 can be obtained from changes in the signals S1, S2, S3, and S4.
For example, as shown in the figure, the control device controls the commutation timing of the coils 10 of the V phase, the W phase, and the U phase according to the signals S2, S3, S4, and the signals S2, S3, S4, The timing T1 is obtained from the signal S1, and the ignition of the engine is controlled at the timing T1.

9 to 12 show the position detection sensor 6.
The position detection sensor 6 is electrically connected to the first, second, third, and fourth Hall ICs 50a, 50b, 50c, and 50d in the resin sensor case 60, and the Hall ICs 50a, 50b, 50c, and 50d. The circuit board 34 to be connected is accommodated, and the sensor case 60 is fastened to the stator 2 and the engine block.

  In the sensor case 60, the sensor case main body 20 that mainly accommodates the circuit board 34 is formed along the arc shape of the outer peripheral edge portion of the stator 2, and the substantially fan-shaped bottom wall 21 overlaps the outer peripheral edge portion of the stator 2. It is arranged. A peripheral wall 23 is formed at the outer edge of the bottom wall 21 to form a concave accommodating portion 22 together with the bottom wall 21. The peripheral wall 23 is an outer peripheral wall portion 23a that forms a fan-shaped outer arc side, an inner peripheral wall portion 23b that forms a fan-shaped inner arc side, and a side wall that forms both sides extending in the fan-shaped radial direction. It consists of parts 23c and 23d.

  Four leg portions 80a, 80b, 80c, and 80d project from the outer surface (the surface facing the stator 2) of the bottom wall 21 of the sensor case body 20 so as to be spaced apart from each other in the arc direction. These leg portions 80a, 80b, 80c, 80d are inserted between the pair of cutout portions 7 of the specific tooth portion 2B of the stator 2 as described above, and the outer peripheral wall of the bottom wall 21. Projections are provided at equal intervals at positions deviated toward the portion 23a. A thick plate-like tongue piece 64 is extended from the outer peripheral wall 23a of the sensor case body 20, and the tongue piece 64 is fastened to the engine block by a bolt (not shown). In addition, a wiring guide 68 is integrally formed at the center of the inner peripheral wall portion 23b of the sensor case main body 20 so as to collect a plurality of lead wires 100a drawn from the bottom wall 21 of the sensor case main body 20 and pull them out sideways. Has been. Further, in the vicinity of both ends in the arc direction of the inner peripheral wall portion 23b, a pair of arm portions 62a whose tip side curves toward the stator 2 direction (the same direction as the extending direction of the leg portions 80a, 80b, 80c, 80d). 62b are extended, and a connecting block 62c is integrally provided at the ends of the pair of arm portions. The connection block 62c is superposed on the side surface of the main body 2a of the stator iron core 2A and is coupled to the stator 2 by a bolt (not shown).

  Further, a support wall 24 for supporting each lead wire 100a drawn out from the inside of the bottom wall 21 of the sensor case body 20 is protruded from the inner peripheral end of the bottom wall 21 of the sensor case body 20. ing. The support wall 24 is disposed on an extension of the inner peripheral wall portion 23 b of the peripheral wall 23 with the bottom wall 21 of the housing portion 22 interposed therebetween. The support wall 24 is provided with a plurality of slits 25 that cut from the protruding end side toward the root portion side, and the lead wires 100a are individually locked in the slits 25.

In addition, a plurality of lead-out holes 72 for drawing the lead wire 100 a from the inside of the housing portion 22 to the outside of the bottom wall 21 are provided at positions that are biased toward the inner peripheral wall portion 23 b of the bottom wall 21.
The sensor unit 32 including the first, second, third, and fourth Hall ICs 50a, 50b, 50c, and 50d and the circuit board 34 is accommodated in the accommodating portion 22 of the sensor case body 20 from the upper opening. . In addition, a pair of locking clips 70 for fixing the sensor unit 32 protrude from the inner surface of the bottom wall 21 of the sensor case body 20. Each of the locking clips 70 has a split pin-like structure with a tapered front end side, and locks the edge of the fitting hole by its own elasticity while being fitted into the mating fitting hole.

  The sensor unit 32 includes first, second, third, and fourth Hall ICs 50a, 50b, 50c, and 50d, a holding block 42 that holds these Hall ICs 50a, 50b, 50c, and 50d, and an attachment to the holding block 42. And a substantially arc-shaped circuit board 34.

  A wiring pattern is printed on the surface of the circuit board 34, and the lead wires of the Hall ICs 50 a, 50 b, 50 c, and 50 d are formed at predetermined positions on the wiring pattern from the bottom wall 21 of the sensor case body 20 through the lead-out holes 72. A plurality of lead wires 100a drawn to the outside are electrically connected by soldering. The lead wire 100a drawn out of the sensor case main body 20 through the lead hole 72 is inserted into the lead hole 72 from the outside of the sensor case main body 20 in the assembling order and pulled out to the inside of the housing portion 22. The tip portion thus soldered is fixed to a predetermined position on the circuit board 34 by soldering. Further, the lead wire 100a is pressed and deformed when inserted into the lead-out hole 72, thereby closing the gap with the lead-out hole 72.

Further, when the holding block 42 and the circuit board 34 of the sensor unit 32 are fixed in the housing portion 22 of the sensor case body 20, the inside of the housing portion 22 is filled with the filler 150 (see FIG. 1) in that state. . Thereby, the filler 150 is filled around the Hall ICs 50a, 50b, 50c, and 50d in the legs 80a, 80b, 80c, and 80d and around the holding block 42 and the circuit board 34, and is left as it is for a predetermined time. It solidifies in the accommodating part 22.
At this time, since the plurality of lead wires 100a connected to the circuit board 34 are drawn out of the accommodating portion 22 through the lead holes 72 provided in the bottom wall 21, the filler 150 before solidification is exposed to the outside. It does not cause capillary action to be sucked out.

  By the way, the insulator 110 attached to the outer surface of the stator core 2A of the stator 2 has a two-part structure as shown in FIG. 7, and the stator core 2A is arranged at one end side in the axial direction (the notched portion 7 is formed in the specific tooth portion 2B). The first insulator member 110 </ b> A that covers from the provided side) and the second insulator member 110 </ b> B that covers the stator core 2 </ b> B from the other end side in the axial direction are configured. FIG. 6 shows the outer shape of the first insulator member 110A.

110A of 1st insulator members and the 2nd insulator member 110B are the peripheral wall 57 which covers the outer surface of the main-body part 2a of 2 A of stator iron cores, and extend radially from the outer peripheral surface of the peripheral wall 57, and the outer surface of each teeth part 2b of 2 A of stator iron cores 2A. A teeth protection portion 58 having a substantially U-shaped cross section, and a flange portion 59 extending substantially in the circumferential direction and covering the corresponding claw piece 3 from the back side to the side at the tip portion of the teeth protection portion 58. Is provided.
However, the claw piece 3 of the specific tooth portion 2B is different from the other tooth portions 2b in that the notch portion 7 is provided on one end side in the axial direction, so that the first insulator member 110A side covering the specific tooth portion 2B is provided. The teeth protection portion 58A is different in shape and size from the corresponding teeth protection portion 58B on the second insulator member 110B side. Further, as shown in FIG. 6, a terminal 120 for coil connection is fixedly installed on the peripheral wall 57 on the first insulator member 110A side by molding.

FIGS. 13 and 14 show the shape and dimensional relationship of one specific tooth portion 2B and the tooth protection portions 58A and 58B attached to the specific tooth portion 2B.
As shown in these drawings, the teeth protection portion 58A on the first insulator member 110A side is formed on the portion of the flange portion 59A that covers the side where the notch portion 7 of the claw piece 3 of the specific teeth portion 2B is located. A notch 65 is provided so as to correspond to the notch 7, and a bent piece 61 is provided along the bottom of the notch 7 on the specific tooth 2B side at the axially extending end. The bent piece 61 is provided with a tapered surface 61a so that the inner corner becomes an obtuse angle.
On the other hand, in the teeth protection portion 58B on the second insulator member 110B side, the flange portion 59B is not provided with a notch, and the overhang width of the flange portion 59B is constant along the axial direction of the stator core 2A.
And the extension length L1 of the axial direction of the part which covers the edge | side with the notch part 7 of the nail | claw piece 3 of the specific teeth part 2B of the teeth protection part 58A (including the flange part 59A) is the teeth protection part. 58B (including the flange portion 58B) is set to be shorter than the extending length L2 in the axial direction of the corresponding portion.
In addition, although all the other tooth protection portions 58 of the first and second insulator members 110A, 110B are set to an equal axial length, even among the tooth protection portions 58A attached to the specific teeth portion 2B, The axial length of the portion covering the side of the claw piece 3 not having the notch 7 is set to be the same as the axial length of the corresponding portion of the corresponding tooth protection portion 58B.

  The first and second insulator members 110A and 110B configured as described above are mounted on the outer surface of the stator core 2A so that the axially extending ends thereof face each other. The coil 10 is wound from the outer surface side by a winding machine (not shown).

At this time, the first and second insulator members 110 </ b> A and 110 </ b> B have a force that opens the distal end side of the teeth protection portion 58 when the teeth protection portion 58 is fitted to the teeth portion 2 b or when the coil 10 is wound. Although it may act, the extension length L1 of the portion covering the side where the notch portion 7 of the specific tooth portion 2B of the tooth protection portion 58A on the first insulator member 110A side is covered is the corresponding portion on the second insulator member 110B side. Since the extension length L2 is set to be shorter than the extension length L2, the opening amount on the distal end side of the tooth protection portion 58A on the first insulator member 110A side is compared with the case where both extension lengths are set to be the same. Is suppressed. Thereby, even if it exists in the flange part 59A of the teeth protection part 58A, the opening of a front end side becomes small.
Therefore, by employing this insulator 110, it is possible to prevent the end of the flange portion 59A from being pulled into the coil 10 when the coil 10 is wound.

  In particular, in the insulator 110 of this embodiment, the bent piece 61 extends along the bottom of the notch portion 7 of the specific tooth portion 2B at the axially extending end of the flange portion 59A on the first insulator member 110A side. Since the end of the bent piece 61 is abutted against the end face of the flange portion 59B on the second insulator member 110B side, the bent piece 61 is prevented from being caught when the coil 10 is wound, Generation | occurrence | production of the clearance gap between the flange parts 59A and 59B can be suppressed. Therefore, this can improve the insulation performance of the insulator 110.

  Further, in the case of the insulator 110 of this embodiment, the bent piece 61 at the extending end of the flange portion 59A is provided with the tapered surface 61a so that the inner bent angle becomes an obtuse angle. There is an advantage that the rigidity on the root side can be advantageously increased and the coil 10 can be smoothly guided by the tapered surface 61a when the coil 10 is wound.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine 2 ... Stator 2b ... Teeth part 2B ... Specific teeth part 3 ... Claw piece 7 ... Notch part 10 ... Coil 61 ... Bending piece 80a, 80b, 80c, 80d ... Leg part 110 ... Insulator 110A ... 1st insulator Member 110B ... second insulator member

Claims (2)

A stator iron core having a plurality of teeth portions radially provided thereon and a coil wound around each of the tooth portions, the ends of the tooth portions of the stator iron core being stretched in a substantially T shape on both sides in the circumferential direction. A claw piece is provided, and a notch portion in which a detection leg portion of the position detection sensor is inserted and disposed in the claw piece of the specific tooth portion among the plurality of tooth portions of the stator core is one end side in the axial direction Used for stators of rotating electrical machines formed from the center toward
A stator insulator that is mounted on an outer surface of the stator core and insulates between the stator core and the coil,
A first insulator member that covers the outer surfaces of the plurality of tooth portions from one end side in the axial direction where the notch portions of the stator core are provided, and an outer surface of the plurality of tooth portions from the other end side in the axial direction of the stator core. In what consists of the 2nd insulator member which covers and is made into the 2 division structure,
The axial length of the portion covering the specific teeth portion of the first insulator member is set shorter than the axial length of the portion covering the specific teeth portion of the second insulator member ,
The axially extending end of the portion covering the specific tooth portion of the first insulator member is provided with an outwardly bent piece along the bottom of the notch portion of the specific tooth portion, and the distal end portion of the bent piece Is abutted against the second insulator member on the extension of the notch, and the stator insulator. A rotating electric machine using the stator insulator according to claim 1 .

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