JP2011234557A - Arrangement structure of ac generator for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrangement structure of an AC generator for a vehicle in which an outer rotor and a stator are integrated into a unit through a radial bearing to properly ensure an air gap between the outer rotor and the stator so as to easily attach a AC generator to an engine.SOLUTION: An AC generator 1 comprises an outer rotor 2 and a stator 3. The outer rotor 2 includes: a cylindrical boss part 21 binding to the crankshaft 82; a peripheral yoke part 23 erecting coaxially with the boss part 21; and an intermediate part 22 connecting the peripheral yoke part 23 with the boss part 21. The stator 3 is arranged on the basis of determining a center location for the outer rotor 2 through a radial bearing 6 located between an inner periphery hole 311 formed in a central core part 31 and the boss part 21 and is prevented from rotating along circumferential direction C by use of a detent member 7 with respect to a cylinder block 81 of an engine 8.

Description

  The present invention relates to an arrangement structure of an AC generator for a vehicle configured to perform single-phase or multiple-phase AC power generation.

  For example, a vehicular AC generator used for a two-wheeled vehicle or the like is arranged on the inner peripheral side of an outer rotor, which is configured by alternately arranging a plurality of N-pole and S-pole permanent magnets in the circumferential direction. And a stator configured by arranging a plurality of wound poles in the circumferential direction. When the outer rotor rotates in response to the rotation of the crankshaft of the engine, the magnetic field generated by the N-pole permanent magnet and the magnetic field generated by the S-pole permanent magnet are repeatedly opposed to the plurality of poles alternately. Thus, AC voltage is generated in coils wound around a plurality of poles.

  For example, in the motor bearing device disclosed in Patent Document 1, the first bearing is soldered to the circuit board, the second bearing is supported by the first bearing, the stator is fixed to the first bearing, and the outer rotor. Is made rotatable by a second bearing. Patent Document 1 discloses that the coaxiality between the first bearing and the second bearing that pivotally support the rotation shaft of the motor can be improved, and a motor with stable characteristics can be obtained. .

JP-A-6-54477

By the way, when the alternator is arranged on the pulley belt side with respect to the crankshaft of the engine, the outer rotor is attached to the crankshaft rotatably arranged on the cylinder block, and the stator is attached to a cover arranged on the cylinder block. Yes. Therefore, in the vehicle, the assembly of the outer rotor and the assembly of the stator are performed in separate steps, and in order to form an appropriate air gap (gap) between the outer rotor and the stator, these positional relationships It is necessary to devise a method to prevent the deviation from occurring.
Therefore, the air gap has to be designed assuming that the outer diameter of the stator is the maximum intersection and the inner diameter of the outer rotor is the minimum intersection, and the air gap has to be increased. Or in order to make the attachment position of a cover and a cylinder block accurate, these process precisions had to be raised and the cost was raised.

  In Cited Document 1, the stator is attached to the first bearing soldered to the circuit board. The stator is fixed to the circuit board via the first bearing, and the outer rotor is rotatably disposed on the first bearing to which the stator is fixed via the second bearing. Therefore, the stator and the outer rotor cannot be assembled and assembled to an assembly target such as an engine.

  The present invention has been made in view of such conventional problems, and an outer rotor and a stator are integrated via a radial bearing, and an air gap between the outer rotor and the stator is appropriately secured, thereby generating an AC generator. It is an object of the present invention to provide a vehicle AC generator arrangement structure that can be easily assembled to an engine.

The present invention includes an outer rotor in which a plurality of N-pole magnetic field forming portions and S-pole magnetic field forming portions are alternately arranged in the circumferential direction, and is disposed on the inner peripheral side of the outer rotor to perform coil winding. A stator having a plurality of poles arranged radially,
AC power generation for a vehicle configured to perform single-phase or multi-phase AC power generation by alternately arranging the N-pole magnetic field forming section and the S-pole magnetic field forming section to each pole. In a structure in which the machine is operated by receiving rotation of a crankshaft in the engine of the vehicle,
The outer rotor includes a cylindrical boss portion connected to the crankshaft, and a cylindrical outer yoke portion erected on the same axis as the boss portion so as to arrange the magnetic field forming portions in the circumferential direction. And having an intermediate portion connecting the outer yoke portion and the boss portion,
The stator is disposed by performing center positioning with respect to the outer rotor via a radial bearing disposed between an inner peripheral hole formed in a central core portion of the stator and the boss portion. The vehicle AC generator has a structure in which rotation in the circumferential direction is prevented by a rotation-preventing member with respect to the block or the cover disposed on the cylinder block (Claim 1). .

The vehicle AC generator arrangement structure of the present invention can be assembled to an engine with an outer rotor and a stator as a set.
Specifically, in the present invention, the stator performs center positioning with respect to the outer rotor via a radial bearing disposed between the inner peripheral hole formed in the central core portion and the boss portion of the outer rotor. Arranged. That is, when the outer rotor and the stator are assembled to the engine, the outer rotor and the stator can be assembled via the radial bearing. Accordingly, the center position of the outer rotor and the stator can be easily determined, and an air gap (gap) formed between the outer rotor and the stator can be appropriately ensured. And this air gap can be made small and the improvement of an electric power generation output can be aimed at.

Further, when the outer rotor and the stator that are integrated via the radial bearing are assembled to the engine, the stator is fixed to the cylinder block of the engine or a cover disposed on the cylinder block in the circumferential direction by a rotation-preventing member. A detent is performed. As a result, the stator is arranged not to be fixed to the cylinder block or the cover but to be prevented from rotating, and the AC generator integrating the outer rotor and the stator can be easily assembled to the cylinder block or the cover. it can.
Therefore, according to the arrangement structure of the AC generator for a vehicle of the present invention, the outer rotor and the stator are integrated via the radial bearing, and the air gap between the outer rotor and the stator is appropriately secured to The generator can be easily assembled to the engine.

Sectional explanatory drawing which shows the alternating current generator for vehicles in Example 1. FIG. Explanatory drawing which shows the alternating current generator for vehicles in Example 1 in the state seen from the axial direction of the crankshaft. Explanatory drawing which shows the outer rotor in Example 1 in the state seen from the axial direction of the crankshaft. Sectional explanatory drawing which expands and shows the periphery of a radial bearing in Example 1. FIG. Sectional explanatory drawing which shows the other alternator for vehicles in Example 1. FIG. Sectional explanatory drawing which shows the alternating current generator for vehicles in Example 2. FIG. The graph which shows these relations, taking an air gap on a horizontal axis and taking a current output on a vertical axis | shaft in a confirmation test.

A preferred embodiment of the arrangement structure of the above-described vehicular AC generator according to the present invention will be described.
In the present invention, the intermediate portion of the outer rotor can be integrally formed of the same material as the boss portion and the outer peripheral yoke portion. The intermediate portion can have a disk shape that connects the boss portion and the outer yoke portion, and can also have a shape that connects the boss portion and the outer yoke portion at a plurality of locations in the circumferential direction.

Further, the anti-rotation member is constituted by an anti-rotation pin inserted into a pin hole provided in the cylinder block or the cover and a pin hole provided in the stator, or an engagement provided in the cylinder block or the cover. It can comprise with the cable which bundled the coil | winding edge part of the said some coil so that it might latch on a stop groove | channel (Claim 2).
In this case, the locking pin can be formed with a simple configuration.

The stator uses a stator core in which a plurality of pole core portions made of a soft magnetic material are radially arranged around the central core portion made of a soft magnetic material, and the coil is wound around each of the plurality of pole core portions. And at least the central core portion of the stator core includes a plurality of inserted electromagnetic steel plates into which the outer peripheral ring of the radial bearing is inserted, and the outer peripheral rings on both sides in the axial direction of the plurality of inserted electromagnetic steel plates. It is preferable to laminate | stack the holding | grip electromagnetic steel plate which hold | suppresses the both axial end surfaces of this to an axial direction (Claim 3).
In this case, the radial bearing can be easily fixed to the stator by devising the shape of the plurality of electromagnetic steel plates constituting at least the central core portion of the stator core. The axial direction refers to the direction of the central axis of the stator.
Further, the pole core portion of the stator core can be formed continuously from the central core portion using a plurality of inserted electromagnetic steel plates and a plurality of holding electromagnetic steel plates. In addition, the pole core part may be formed by compressing iron-based powder using a separate soft magnetic material from the central core part, or by laminating electromagnetic steel sheets in the axial direction and fitting into the central core part. it can.

The outer rotor may be disposed with the intermediate portion disposed on the cylinder block side, and the stator may be disposed by rotating the cover covering the stator with the rotation preventing member. 4).
In this case, the stator exposed to the outside with respect to the cylinder block is covered with a cover, and the stator can be easily prevented from rotating by using the cover.

The cover is preferably made of resin.
Since the stator is not fixed to the cover and only needs to be prevented from rotating with respect to the cover, the strength of the cover can be reduced. And since it is not necessary to ensure the intensity | strength which fixes a stator, a cover can be comprised with resin and can aim at cost reduction.

The outer rotor may be disposed with the intermediate portion disposed on the side opposite to the cylinder block side, and the stator may be disposed with the cylinder block being prevented from rotating by the rotation preventing member. 6).
In this case, the stator can be covered by the outer rotor, and the cover can be eliminated.

In addition, it is preferable that a pulley portion is provided on the outer periphery of the outer peripheral portion of the outer rotor, over which a belt for driving auxiliary machinery in the engine room is driven by the rotation of the crankshaft.
In this case, the function of a pulley that is rotated by rotation of the crankshaft can be added to the AC generator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to a vehicle AC generator arrangement structure of the present invention will be described below with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, the arrangement structure of the vehicle alternator 1 according to this example operates the alternator 1 by receiving the rotation of the crankshaft 82 of the engine 8. The AC generator 1 is disposed on the inner peripheral side of the outer rotor 2 and the outer rotor 2 in which a plurality of N-pole magnetic field forming portions 24N and S-pole magnetic field forming portions 24S are alternately arranged in the circumferential direction C. The stator 3 is formed by arranging a plurality of poles 30 around which the coils 4 are wound in a radial pattern. For each pole 30, an N-pole magnetic field forming portion 24N and an S-pole magnetic field forming portion 24S are alternately arranged. Are arranged so as to face each other to perform single-phase AC power generation.

The outer rotor 2 has a cylindrical boss portion 21 connected to the crankshaft 82 and a cylindrical shape erected in the same axial center as the boss portion 21 so that the magnetic field forming portions 24N and 24S are arranged in the circumferential direction C. The outer yoke portion 23 and the intermediate portion 22 connecting the outer yoke portion 23 and the boss portion 21 are provided.
The stator 3 is disposed with its center positioned with respect to the outer rotor 2 via a radial bearing 6 disposed between the inner peripheral hole 311 formed in the central core portion 31 and the boss portion 21, and the engine 3. The eight cylinder blocks 81 are prevented from rotating in the circumferential direction C by the rotation stopper 7.

Hereinafter, the arrangement structure of the vehicle alternator 1 of this example will be described in detail with reference to FIGS.
The alternator 1 of this example is a single-phase magnet type alternator, and is configured to generate power by receiving the rotation of the engine 8 and to charge the battery with the generated power. Auxiliary machines that operate in response to the rotation of the crankshaft 82 include an electric power steering, an air conditioner compressor, a water pump, and the like.
As shown in FIG. 1, the outer rotor 2 of this example is connected to the end of the crankshaft 82 of the engine 8 by the boss portion 21 and is configured to rotate in response to the rotation of the engine 8. The outer rotor 2 is formed by disposing the intermediate portion 22 on the opposite side of the cylinder block 81 side with respect to the boss portion 21 and the outer peripheral yoke portion 23. The alternator 1 of this example is arranged on the pulley side rather than the transmission side with respect to the engine 8.

  The anti-rotation member 7 of this example is constituted by anti-rotation pins 7 inserted into pin holes 811 provided in the cylinder block 81 and pin holes 36 provided in the stator 3. The locking pin 7 of this example is provided in the cylinder block 81, and the taper portion 71 provided at the tip of the locking pin 7 is inserted into the hole 312 provided in the central core portion 31 of the stator 3 so that the cylinder The stator 3 is prevented from rotating with respect to the block 81. Since the locking pin 7 does not require great strength, it can be made of resin or the like in addition to being made of metal.

As shown in FIG. 5, the rotation stopper 7 can be a cable 7 </ b> A in which winding ends of a plurality of coils 4 are bundled. The cable 7A is formed by arranging winding ends of a plurality of coils 4 in a resin tube, and has a certain degree of strength so that the stator 3 can be prevented from rotating. In this case, the rotation of the stator 3 can be prevented by locking the cable 7 </ b> A in which the winding ends of the plurality of coils 4 are bundled with the locking groove 812 provided in the cylinder block 81. In addition, in the same figure, although the case where the rotation pin 7B is also used as the rotation stop member 7 is shown, the rotation pin 7B can be abbreviate | omitted.
Further, in this example, the cover disposed on the surface of the stator 3 is eliminated by covering the stator 3 with the outer rotor 2.

As shown in FIGS. 1 and 3, the intermediate portion 22 of this example is provided with a plurality of cooling ports 221 arranged in the circumferential direction C for sending air toward the stator 3 when the outer rotor 2 rotates. is there. The intermediate portion 22 in this example is formed by a plurality of cooling fins 22 arranged in the circumferential direction C, and the cooling port 221 in this example is formed by a gap between the cooling fins 22. When the outer rotor 2 rotates, the cooling effect of the stator 3 can be improved by forcibly sending air toward the stator 3 by the plurality of cooling fins 22.
Further, as shown in FIG. 1, on the inner peripheral side of the outer peripheral yoke portion 23 of the outer rotor 2, there are a permanent magnet constituting the N pole magnetic field forming portion 24N and a permanent magnet constituting the S pole magnetic field forming portion 24S. They are alternately arranged in the circumferential direction C at regular intervals.

As shown in FIG. 2, a pulley portion 25 is provided on the outer periphery of the outer yoke portion 23 of the outer rotor 2 so as to hang a belt 5 for driving auxiliary machinery in the vehicle by rotation of the crankshaft 82. The belt 5 of this example is a V-belt formed by forming a plurality of V-shaped ridges 52 in parallel in the width direction on the inner peripheral surface 51 in contact with the pulley portion 25. The pulley portion 25 of this example is formed by forming a plurality of V-shaped groove portions 251 corresponding to the shape of the V-shaped peak portion 52 in parallel in the width direction on the outer peripheral surface thereof.
The permanent magnets as the magnetic field forming portions 24N and 24S in this example are disposed on the inner peripheral surface of the outer peripheral yoke portion 23. In the AC generator 1 of this example, as shown in FIG. 1, when the outer rotor 2 rotates, the plurality of V-shaped groove portions 251 are not in contact with the V-shaped peak portion 52 (left side portion). The permanent magnets as the magnetic field forming portions 24N and 24S are configured to be air-cooled. With the configuration in which the plurality of V-shaped groove portions 251 are formed and the configuration in which the permanent magnets are disposed on the inner peripheral surface of the outer yoke portion 23, the permanent magnets in the outer rotor 2 are effectively air-cooled when the outer rotor 2 rotates. It is possible to suppress the occurrence of thermal demagnetization in which the magnetic force decreases as the temperature rises.

Further, the pulley portion 25 has shoulder portions 252 that protrude in the radial direction on both sides in the axial direction with respect to the plurality of V-shaped groove portions 251 in order to prevent the belt 5 from being detached.
The belt 5 of this example is a toothed V-belt formed by forming a tooth surface 511 on the inner peripheral surface 51 of the entire circumference, and the pulley portion 25 has teeth on the outer peripheral surface on which a plurality of V-shaped groove portions 251 are formed. It has a tooth surface along the tooth surface 511 of the attached V-belt.

As shown in FIG. 2, the stator 3 is configured by using a stator core 3 </ b> A in which a plurality of pole core portions 32 are arranged in a circumferential direction C around a central core portion 31 made of a soft magnetic material. The plurality of poles 30 in the stator 3 are formed by winding the coil 4 around the outer periphery of a bobbin 33 made of an insulating resin attached to each pole core portion 32. Moreover, the coil 4 is comprised with the magnet wire which is conductors, such as a copper wire which provided the insulating film.
The stator 3 is configured by alternately arranging a right-handed pole 30 for winding a magnet wire in a clockwise direction and a left-handed pole 30 for winding a magnet wire in a left-handed direction in the circumferential direction C. A magnet wire can be continuously wound around each right-handed pole 30 and left-handed pole 30.

As shown in FIG. 4, the stator core 3 </ b> A made of a soft magnetic material constituting the stator 3 is formed by laminating a plurality of electromagnetic steel plates 34 via an adhesive layer 35 at least in the central core portion 31 in the axial direction. The stator 3 is formed by arranging the coils 4 with respect to the plurality of pole core portions 32 in the stator core 3A.
The central core portion 31 of the stator core 3A of this example includes a plurality of inserted electromagnetic steel plates 34A into which the outer peripheral ring 61 of the radial bearing 6 is inserted, and both axial ends of the outer peripheral ring 61 on both sides in the axial direction of the plurality of inserted electromagnetic steel plates 34A. A pressing electromagnetic steel plate 34B for pressing the surface is laminated in the axial direction. The radial bearing 6 is simply fixed to the stator 3 by devising the shape of the plurality of electromagnetic steel plates 34.

  Further, the inner peripheral ring 62 of the radial bearing 6 is attached to the boss portion 21 of the outer rotor 2. The inner peripheral hole 311 in the central core portion 31 includes an inner peripheral hole portion formed in the fitted electromagnetic steel plate 34A and an inner peripheral side portion formed in the pressing electromagnetic steel plate 34B with a diameter smaller than that of the inner peripheral hole portion. A plurality of metal balls 63 are arranged in an annular shape between the outer ring 61 and the inner ring 62.

In the arrangement structure of the vehicle alternator 1 of this example, the pulley portion 25 is provided on the outer periphery of the outer yoke portion 23 of the outer rotor 2, and the pulley portion 25 is compensated for in the vehicle by the rotation of the crankshaft 82. The belt 5 that drives the machinery is routed. That is, the pulley portion 25 is integrated with the outer rotor 2 of the AC generator 1.
As a result, the AC generator 1 is attached to the end of the engine 8 on the accessory drive side, and when the AC generator 1 is maintained, the outer rotor 2 and the belt 5 are removed to facilitate this maintenance. Can be done. Further, by integrating the outer rotor 2 and the pulley portion 25, the periphery of the transmission in the engine 8 can be reduced in size.

Further, the arrangement structure of the vehicle alternator 1 of this example can be assembled to the engine 8 with the outer rotor 2 and the stator 3 as a set.
Specifically, in the present example, the stator 3 is formed by the outer rotor 2 via a radial bearing 6 disposed between the inner peripheral hole 311 formed in the central core portion 31 and the boss portion 21 of the outer rotor 2. Is positioned with respect to the center. That is, when the outer rotor 2 and the stator 3 are assembled to the engine 8, the outer rotor 2 and the stator 3 can be assembled via the radial bearing 6. Accordingly, the center position of the outer rotor 2 and the stator 3 can be easily positioned, and an air gap (gap) 39 formed between the outer rotor 2 and the stator 3 (see FIGS. 1 and 2). Can be secured appropriately. And this air gap 39 can be made small and the improvement of an electric power generation output can be aimed at.

Further, when the outer rotor 2 and the stator 3 integrated through the radial bearing 6 are assembled to the engine 8, the stator 3 is moved in the circumferential direction C by the rotation stop member 7 with respect to the cylinder block 81 of the engine 8. The detent is performed. As a result, the stator 3 is arranged not to be fixed to the cylinder block 81 but to prevent rotation, and the AC generator 1 in which the outer rotor 2 and the stator 3 are integrated is simply assembled to the cylinder block 81. be able to.
Therefore, according to the arrangement structure of the vehicle alternator 1 of this example, the outer rotor 2 and the stator 3 are integrated via the radial bearing 6, and the air gap 39 between the outer rotor 2 and the stator 3 is formed. The alternator 1 can be easily assembled to the engine 8 with appropriate securing.

(Example 2)
In this example, as shown in FIG. 6, the intermediate portion 22 of the outer rotor 2 is disposed on the cylinder block 81 side, and the stator 3 is prevented from rotating with respect to the cover 83 by a rotation stopping member (rotation pin) 7. This is an example of arrangement.
Since the stator 3 of this example is not fixed to the cover 83 and only needs to be prevented from rotating with respect to the cover 83, the strength of the cover 83 can be reduced. Therefore, the cover 83 of this example does not need to ensure the strength for fixing the stator 3 and is made of resin.
The outer rotor 2 is fixed to a mounting part 84 that is rotatably provided to the crankshaft 82.
In this example, the stator 3 exposed to the outside with respect to the cylinder block 81 is covered with the cover 83, and the stator 3 can be easily prevented from rotating by using the cover 83.
Also in this example, the other configurations of the AC generator 1 are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained.

(Confirmation test)
In this confirmation test, with respect to the alternator 1 (invention product) provided with the radial bearing 6 shown in Example 1 above, the effect of improving the characteristics of the output current (A) of the power generation by reducing the air gap 39 will be described. This will be described in comparison with a conventional AC generator (comparative product) that does not include the bearing 6.
As shown in FIG. 7, the comparative product does not have the radial bearing 6, and the outer rotor 2 and the stator 3 are separately assembled to the engine 8. An output of only about 5.6 (A) was obtained. On the other hand, the invention has a configuration in which the outer rotor 2 and the stator 3 are integrally assembled to the engine 8 using the radial bearing 6, whereby the air gap 39 can be reduced, and the output current of power generation can be reduced. It was found that it could be increased to 6.44 (A) or 7 (A).

DESCRIPTION OF SYMBOLS 1 AC alternator for vehicles 2 Outer rotor 21 Boss part 22 Middle part 23 Outer peripheral yoke part 24N N pole magnetic field formation part 24S S pole magnetic field formation part 3 Stator 3A Stator core 30 Pole 31 Center core part 32 Pole core part 34 Electrical steel plate 39 Gap 4 Coil 5 Belt 6 Radial bearing 7 Non-rotating member 8 Engine 81 Cylinder block 82 Crankshaft 83 Cover

Claims (7)

An outer rotor in which a plurality of N-pole magnetic field forming portions and S-pole magnetic field forming portions are alternately arranged in the circumferential direction, and a pole on which the coil is wound is radially arranged on the inner peripheral side of the outer rotor. A plurality of stators arranged in a
AC power generation for a vehicle configured to perform single-phase or multi-phase AC power generation by alternately arranging the N-pole magnetic field forming section and the S-pole magnetic field forming section to each pole. In a structure in which the machine is operated by receiving rotation of a crankshaft in the engine of the vehicle,
The outer rotor includes a cylindrical boss portion connected to the crankshaft, and a cylindrical outer yoke portion erected on the same axis as the boss portion so as to arrange the magnetic field forming portions in the circumferential direction. And having an intermediate portion connecting the outer yoke portion and the boss portion,
The stator is disposed by performing center positioning with respect to the outer rotor via a radial bearing disposed between an inner peripheral hole formed in a central core portion of the stator and the boss portion. An arrangement structure for an AC generator for a vehicle, characterized in that the rotation of the block or the cover arranged on the cylinder block in the circumferential direction is prevented by a rotation-preventing member.   2. The vehicle AC generator according to claim 1, wherein the rotation stop member is a rotation pin inserted into a pin hole provided in the cylinder block or the cover and a pin hole provided in the stator. 3. AC power generation for a vehicle, characterized in that it is configured by a cable in which winding ends of the plurality of coils are bundled so as to be locked in a locking groove provided in the cylinder block or the cover Machine arrangement structure. 3. The arrangement of the vehicle alternator according to claim 1, wherein the stator has a plurality of pole core portions made of a soft magnetic material radially arranged around the central core portion made of a soft magnetic material. The coil is wound around each of the plurality of pole core portions to form the pole,
At least the central core portion of the stator core includes a plurality of fitted electromagnetic steel plates into which the outer circumferential ring of the radial bearing is fitted, and a presser that holds both axial end surfaces of the outer circumferential ring on both sides in the axial direction of the plurality of fitted electromagnetic steel plates. An arrangement structure of an AC generator for a vehicle, characterized in that an electromagnetic steel plate is laminated in an axial direction. The arrangement structure of the vehicle alternator according to any one of claims 1 to 3, wherein the outer rotor is configured such that the intermediate portion is disposed on the cylinder block side.
An arrangement structure of an AC generator for a vehicle, wherein the stator is arranged so as to be prevented from rotating by the rotation-preventing member with respect to the cover that covers the stator.   The arrangement structure of the alternating current generator for vehicles as described in any one of Claims 1-4 WHEREIN: The said cover is resin, The arrangement structure of the alternating current generator for vehicles characterized by the above-mentioned. The arrangement of the vehicle alternator according to any one of claims 1 to 3, wherein the outer rotor is configured such that the intermediate portion is disposed on the side opposite to the cylinder block side.
An arrangement structure of an AC generator for a vehicle, wherein the stator is arranged so as to be prevented from rotating with respect to the cylinder block by the anti-rotation member.   The arrangement of the AC generator for a vehicle according to any one of claims 1 to 6, wherein an auxiliary device in the vehicle is driven by rotation of the crankshaft on an outer periphery of the outer peripheral portion of the outer rotor. An arrangement for arranging an AC generator for a vehicle, characterized in that a pulley section is provided over which a belt for carrying out the operation is stretched.

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