JP5619301B2 - Rotating electric machine for vehicles - Google Patents

Description

  The present invention relates to a vehicular rotating electrical machine such as a vehicular AC generator, and more particularly to a holding structure for electric wiring wired around a vehicular rotating electrical machine mounted on a vehicle.

  Many electric wirings are wired around the vehicle AC generator mounted on the vehicle. If these electrical wirings are too long, they vibrate in response to vibrations from the engine and the like, and disconnections are likely to occur, so they are partially fixed to the vehicle body or the vehicle alternator.

In the conventional vehicle alternator, the rectifier and the like are fixed to the outside of the rear frame, and a resin rear cover is attached to the rear frame so as to cover the rectifier and the like.
And the harness clamp which fixes electric wiring is attached and fixed to the protrusion part protruded integrally from the rear cover (for example, patent document 1).

Japanese Patent No. 4151348

  Here, since the rear cover is generally used to protect components such as the rectifier from being exposed to water and foreign matters, the front cover and the rear that support the rotor and the vehicle AC generator are supported. Unlike the side frame, it is manufactured with a thickness that allows elastic deformation without requiring high rigidity.

Thus, when the harness clamp is attached to the resin rear cover as in the structure described in Patent Document 1, the holding strength of the electric wiring cannot be increased, and the harness clamp is fixed when the vehicle vibration is large. There is a risk that the harness cover will fall off the rear cover due to insufficient strength of the rear cover.
For this reason, when the harness clamp is dropped, the rear cover is damaged, or the harness clamp is dropped, and as a result, the electric wiring may be disconnected due to vibration.

  The present invention has been made to solve the above-described problems, and by increasing the holding strength of the harness clamp and suppressing the vibration of the electric wiring caused by the vibration of the vehicle, the damage of the protective cover and An object of the present invention is to obtain a vehicular rotating electrical machine capable of suppressing the occurrence of disconnection of electrical wiring.

  A vehicular rotating electrical machine according to the present invention includes a rotor rotatably supported in a casing, a stator core, and a stator winding wound around the stator core, and the casing surrounds the rotor. A rectifier having a positive-side heat sink on which a positive-side rectifying element is mounted and rectifying AC power generated in the stator winding, disposed on the outer side of the casing in the axial direction. The bottomed cylinder is composed of a bottom with a through hole and a cylindrical peripheral wall, and has a protrusion protruding in the opening direction from the peripheral edge of the through hole, and is attached to the casing so as to cover the rectifier A protective cover made of resin, inserted into the through hole, fixed to one side in the axial direction of the casing, and having a mounting bolt for fixing the rectifier to the casing, and a protruding portion protruding to the protective cover side, Mounting bolt and positive side heat An insulating member that electrically insulates the link, a mounting bracket that is fixed to the extension from the through hole of the mounting bolt, and a resin harness clamp that fixes the electrical wiring. And the protruding portion and the protruding portion are arranged so as to overlap each other in the axial direction of the mounting bolt.

According to the present invention, the mounting bolt is inserted into the through hole formed in the bottom portion of the protective cover, the rectifier is fixed to a portion on one side in the axial direction of the casing, and the mounting bracket extends from the through hole of the mounting bolt. It is fixed to the part. And since the harness clamp is held by the mounting bracket, it is possible to increase the holding strength of the harness clamp, so that the vibration of the electrical wiring fixed to the harness clamp due to the vibration of the vehicle is suppressed, The occurrence of damage to the protective cover and disconnection of the electrical wiring can be suppressed.
Furthermore, since the protruding portion protruding from the peripheral edge of the through hole of the protective cover and the protruding portion of the insulating member are disposed at a position overlapping in the axial direction of the mounting bolt, water intrusion into the protective cover, dust, etc. Can be prevented.

It is sectional drawing which shows the whole vehicle alternator which concerns on Embodiment 1 of this invention. It is the top view which looked at the AC generator for vehicles in Drawing 1 from the protection cover side. It is sectional drawing of the alternating current generator for vehicles in the AA arrow of FIG. It is principal part sectional drawing which shows the state before mounting bracket attachment in the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is principal part sectional drawing which shows the fixed state of the electrical wiring in the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a figure explaining the structure of the attachment metal fitting which concerns on Embodiment 1 of this invention. It is a principal part expanded sectional view of the alternating current generator for vehicles in FIG.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing the entire vehicle alternator according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the vehicle alternator in FIG. 1 viewed from the protective cover side, and FIG. FIG. 4 is a cross-sectional view of the vehicle alternator as viewed from the arrows AA in FIG. 4, FIG. It is principal part sectional drawing which shows the fixed state of the electrical wiring in the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. 6A and 6B are diagrams for explaining the configuration of the mounting bracket according to the first embodiment of the present invention. FIG. 6A is a top view and FIG. 6B is a side view. FIG. 7 is an enlarged sectional view of a main part of the vehicle alternator in FIG. In addition, in each figure, the same code | symbol shows the same part.

  1 and 2, a vehicular AC generator 1 includes a casing 4 composed of a substantially bowl-shaped aluminum front bracket 2 and a rear bracket 3, and a casing 4 that is rotatable via a pair of bearings 5. A shaft 6 supported by the shaft 6, a pulley 7 fixed to the end of the shaft 6 extending to the front side of the casing 4, a rotor 8 fixed to the shaft 6 and disposed in the casing 4, and this rotation A stator 9 fixed to the casing 4 so as to surround the child 8, and a pair of slip rings 10 fixed to an extension portion of the shaft 6 extending to the rear side of the casing 4 and supplying current to the rotor 8; A pair of brushes 11 that slide on the surface of each slip ring 10, a brush holder 12 that houses these brushes 11, and a heat sheath disposed on the outer diameter side of the brush holder 12. And a voltage regulator 14 that adjusts the magnitude of the AC voltage generated in the stator 9, and a voltage regulator 14 that is disposed on the rear side of the rear bracket 3 and an external device (not shown). A connector 15 for inputting / outputting a signal to / from the rear bracket 3, a rectifier 16 disposed on the rear side of the rear bracket 3 to rectify an AC voltage generated in the stator 9 into a DC voltage, a brush holder 12, a voltage regulator 14, and a rectifier 16 is provided with a protective cover 17 attached to the rear bracket 3 so as to cover 16 and a mounting bracket 19 to which a harness clamp 18 described later is attached.

  A plurality of intake holes 2 a, 3 a are formed in the substantially bowl-shaped bottom portions of the front bracket 2 and the rear bracket 3, and a plurality of exhaust holes 2 b, 3 b are formed in the outer shoulders of the front bracket 2 and the rear bracket 3.

The rotor 8 is a Landel-type rotor, and is provided with a field winding 20 that generates a magnetic flux when an excitation current is passed, and a field that forms a magnetic pole by the magnetic flux. And an iron core 21. A front side cooling fan 8a made of a centrifugal fan is fixed to the front side end face of the field iron core 21, and similarly, a rear side cooling fan 8b made of a centrifugal fan is fixed to the rear side end face of the field core 21. It is fixed.
A shaft 6 is inserted through the shaft 6 at the axial center of the field iron core 21, and a pair of slip rings 10 are provided at the rear end of the shaft 6 protruding from the rear bracket 3. A field winding 20 is electrically connected to 10.

  The stator 9 is wound around the cylindrical stator core 22 and the stator core 22, and an alternating current is generated by a change in magnetic flux from the field winding 20 as the rotor 8 rotates. 23. The stator 9 is disposed so as to surround the rotor 8 with the stator core 22 sandwiched between the opening ends of the front bracket 2 and the rear bracket 3 from both sides in the axial direction.

The rectifier 16 includes a positive-side heat sink 25 on which a plurality of positive-side rectifying elements 24 are mounted, a negative-side heat sink 26 on which a plurality of negative-side rectifying elements (not shown) are mounted, and a circuit board 27. The circuit board 27 is sandwiched between the positive-side heat sink 25 and the negative-side heat sink 26 so as to be substantially C-shaped.
The circuit board 27 is a resin molded body 27a obtained by molding an insulating resin such as polybutylene terephthalate (PBT) into a substantially C shape, and is insert-molded into the resin molded body 27a. The rectifier 16 and the stator winding 23 are connected to each other. And a plurality of conductors 27b to be electrically connected. The conductor 27b is connected so that the positive-side rectifying element 24 and the negative-side rectifying element constitute a predetermined bridge circuit via the circuit board 27.

  The stud bolt 28 as a mounting bolt is a bolt having a first shaft portion 28a and a second shaft portion 28b in which screw portions are formed, and a nut portion 29 is formed at an intermediate portion between the shaft portions 28a and 28b. Has been. The nut portion 29 can be formed by increasing the diameters of both shaft portions 28a and 28b, in addition to the case where the nuts are fixedly formed.

As shown in FIG. 3, the rectifier 16 configured as described above has a positive-side heat sink 25 and a negative-side heat sink 26 stacked with a circuit board 27 interposed therebetween, and the first shaft portion 28 a of the stud bolt 28 is connected to the positive side. The heat sink 25, the circuit board 27, and the negative electrode side heat sink 26 are inserted and fastened to the outer end surface of the rear bracket 3.
At this time, the stud bolt 28 and the negative-side heat sink 26 are electrically insulated by a circuit board 27, and the stud resin 28 and the positive-side heat sink 25 are interposed with a mold resin 30 as an insulating member. Is electrically insulated.

  The mold resin 30 has a cylindrical shape having an insertion hole 30a through which the first shaft portion 28a of the stud bolt 28 is inserted. After the first shaft portion 28a is inserted, the nut portion 29 of the stud bolt 28 is inserted into the mold resin. Tightening of the stud bolt 28 is completed by coming into contact with 30. The outer periphery of the mold resin 30 is provided with a protruding portion 30b protruding toward the protective cover 17 side.

  The rectifier 16 fixed to the rear bracket 3 by the stud bolt 28 is arranged in a fan shape centered on the shaft 6 on a plane orthogonal to the axis of the shaft 6 on the outer peripheral side of the slip ring 10. The lead wire 23a of the stator winding 23 is drawn from the rear bracket 3 and connected to the conductor 27b of the circuit board 27, and the rectifier 16 and the stator winding 23 are electrically connected.

  The brush holder 12 is disposed between both ends of the rectifier 16 in the substantially C-shaped circumferential direction, and is fastened and fixed to the outer end surface of the rear bracket 3. The voltage regulator 14 in which the noise preventing capacitor 31 and the connector 15 are integrally mounted is disposed outside the brush holder 12 in the radial direction, and is fastened and fixed to the outer end surface of the rear bracket 3.

The protective cover 17 is molded into a bottomed cylindrical shape including a bottom portion 32 and a peripheral wall portion 33 using an insulating resin such as PBT or nylon 66, and the bottom portion 33 has a plurality of intake holes along a concentric circle. 34 is formed, and the intake hole 34 is opposed to the heat sink 13 of the voltage regulator 14 and the positive heat sink 25 of the rectifier 16.
As shown in FIG. 3, a drain hole 35 is formed on the bottom 32 side of the peripheral wall portion 33, and a through hole 36 through which the second shaft portion 28 b of the stud bolt 28 passes is close to the drain hole 35. The bottom portion 32 is formed. The drain hole 35 is formed at a position facing the ground direction of the peripheral wall 33, that is, vertically downward when the vehicle alternator 1 is mounted on the vehicle.
Furthermore, a protrusion 37 is provided on the opening side of the through hole 36 toward the rear bracket 3. In the present embodiment, the projecting portion 37 is provided with a tapered portion 37a on the outer peripheral side so as to be tapered toward the tip.

The protective cover 17 configured as described above is attached to the rear bracket 3 so as to cover the rectifier 16, the brush holder 12, and the voltage regulator 14 with the opening side facing the rear bracket 3. At this time, the nut portion 29 and the second shaft portion 28 b of the stud bolt 28 extend from the through hole 36.
When the protective cover 17 is attached to the rear bracket 3, the protrusions 37 provided in the through holes 36 are disposed on the outer peripheral side of the nut portion 29 and on the inner peripheral side of the protruding portion 30 b of the mold resin 30. The protruding portion 37 and the protruding portion 30b of the mold resin 30 are disposed through a gap at a position where the protruding portion 30 and the protruding portion 30b of the molding resin 30 partially overlap with each other in the axial direction of the stud bolt 28. A labyrinth structure that suppresses flooding is formed.

As shown in FIG. 6, the mounting bracket 19 is manufactured by press-molding a metal flat plate such as stainless steel, for example. The mounting portion 38, a holding portion 39 that is integrally extended from one end of the mounting portion 38, And an anti-rotation portion 40 formed by being bent at a right angle from the other end of the attachment portion 38. A stud bolt insertion hole 41 is formed in the attachment portion 38, and a harness clamp holding hole 42 is formed in the holding portion 39.
Then, as shown in FIG. 3, the mounting bracket 19 is mounted by inserting the second shaft portion 28b extending from the through hole 36 of the protective cover 17 into the stud bolt insertion hole 41, and is screwed into the second shaft portion 28b. The attachment portion 38 is sandwiched between the nut 43 and the nut portion 29 so as to cover the through hole 36 of the protective cover 17 by the fastening force of the attached nut 43 and is fixed to the stud bolt 28. At this time, the anti-rotation portion 40 is fitted into the drain hole 35 of the protective cover 17, and the mounting bracket 19 is prevented from being rotated when the nut 43 is fastened.

The harness clamp 18 is a resin molded body using an insulating resin such as PBT or nylon 66, and is formed at one end of the holding portion 18a and the holding portion 18a holding the electric wiring 44 as shown in FIG. And a pair of snap fit claws 18c extending from the seat 18b.
In order to attach the harness clamp 18 to the mounting bracket 19, after fixing the electric wiring 44 to the holding portion 18 a, the pair of snap fit claws 18 c are inserted into the harness clamp holding holes 42 of the holding portion 39 to be snap-fit coupled. . As a result, the seat portion 18 b is seated on the outer peripheral surface of the holding portion 39, the tip projection of the snap fit claw 18 c is seated on the inner peripheral surface of the holding portion 39, and the harness clamp 18 is held by the holding portion 39.

  In the vehicle alternator 1 configured as described above, a field current is supplied from a battery (not shown) to the field winding 20 via the brush 11 and the slip ring 10 to generate a magnetic flux. By this magnetic flux, the claw-shaped magnetic poles of the field iron core 21 are magnetized alternately to the N pole and the S pole in the circumferential direction. On the other hand, the rotational torque of the engine is transmitted to the shaft 6 via a belt (not shown) and the pulley 7, and the rotor 8 is rotated. Therefore, a rotating magnetic field is applied to the stator winding 23 of the stator 9, and an electromotive force is generated in the stator winding 23. Then, the AC electromotive force generated in the stator winding 23 is rectified to DC by the rectifier 16, and the magnitude of the output voltage is adjusted by the voltage regulator 14 to be supplied to the battery or the on-vehicle electric load. Is done.

At this time, the front side cooling fan 8 a and the rear side cooling fan 8 b rotate in conjunction with the rotation of the rotor 8. As shown in FIG. 1, on the front side, air is sucked into the front bracket 2 from the intake hole 2a, flows in the axial direction, reaches the rotor 8, and is bent in the centrifugal direction by the front side cooling fan 8a. The air bent in the centrifugal direction cools the coil end of the stator winding 23 and is discharged to the outside of the front bracket 2 through the exhaust hole 2b.
On the other hand, on the rear side, air is sucked into the protective cover 17 from the intake hole 34, cools the rectifier 16, the voltage regulator 14, and the like and flows to the rear bracket 3 side. Then, the air is sucked into the rear bracket 3 from the intake hole 3a, flows in the axial direction, reaches the rotor 8, and is bent in the centrifugal direction by the rear side cooling fan 8b. The air bent in the centrifugal direction cools the coil end of the stator winding 23 and is discharged to the outside of the rear bracket 3 through the exhaust hole 3b.

  According to the first embodiment, the mounting bracket 19 is fastened and fixed to the stud bolt 28 that fastens and fixes the rectifier 16 to the rear bracket 3, and the harness clamp 18 is held by the mounting bracket 19. Therefore, the holding member of the harness clamp 18 can be made of a metal material, and the holding strength of the harness clamp 18 is higher than that of a conventional technique in which the harness clamp 18 is held by a protruding portion that integrally protrudes from a protective cover made of resin. Can be significantly larger. Thereby, the vibration of the electric wiring 44 resulting from the vibration of the vehicle or the like is suppressed, and damage to the protective cover 17 and occurrence of disconnection of the electric wiring 44 can be suppressed.

  In addition, the mounting portion 38 of the mounting bracket 19 is sandwiched between the nut 43 and the nut portion 29 so as to cover the through hole 36 of the protective cover 17 and is fixed to the stud bolt 28. Intrusion of water and dust into the protective cover 17 is suppressed, and the reliability and durability of the vehicle alternator can be improved.

  In addition, the protrusion 37 provided on the peripheral edge of the protective cover 17 on the opening side of the through hole 36 and the protrusion 30b of the mold resin 30 are disposed at a position overlapping the axial direction of the stud bolt 28. Since the labyrinth structure can be formed, infiltration of water, dust and the like from the through hole 36 into the protective cover 17 is suppressed, and the reliability and durability of the AC generator for vehicles can be improved. Furthermore, the leakage current between the rectifier 16 and the rear bracket 3 and the rusting of the rear bracket 3 which are generated by water immersion in the protective cover 17 can be suppressed.

  Further, since the protective cover 17 is not involved in the holding structure of the harness clamp 18, the harness clamp 18 can be held on the rear bracket 3 regardless of the shape of the protective cover 18, and the design freedom of the protective cover 17 is increased. By increasing, it is possible to improve the vehicle mountability of the vehicle AC generator.

  Further, since the stud bolt 28 is inserted into the insertion hole 30 a of the mold resin 30, the mold resin 30 can be fixed when the stud bolt 28 is fastened to the rear bracket 3. There is no need to provide it.

  Further, when a dissimilar metal joint exists in the protective cover 17, for example, the lead wire 23 a of the stator winding and the circuit board 27 for electrically connecting the rectifier 16 and the stator winding 23. In the case where the conductor 27b is joined with a dissimilar metal, there is a risk of electrolytic corrosion at those locations, but in the present embodiment, intrusion of water or dust into the protective cover 17 is suppressed. Therefore, since electric corrosion at these dissimilar metal joints can be suppressed, the reliability and durability of the vehicle alternator can be improved.

Further, in the present embodiment, air is sucked into the protective cover 17 from the intake hole 34 by the rear cooling fan 8b of the rotor 8, and the rectifier 16 and the like are cooled and flow to the rear bracket 3 side.
Here, air is also sucked into the protective cover 17 from the gap between the through hole 36 of the protective cover 17 and the stud bolt 28, and this point is the cooling of the positive-side heat sink 25 of the rectifier 16 as shown in FIG. 3. It is not the main flow path for air.
Therefore, by forming a labyrinth structure with the protrusion 37 and the protrusion 30b in the gap between the through hole 36 and the stud bolt 28, the flow of air sucked from here can be inhibited, and as a result, the intake hole Since the amount of air sucked into the protective cover 17 from 34 can be increased, the cooling efficiency of the rectifier 16 can be increased, and the reliability and durability of the vehicle alternator can be improved.

  In addition, in the present embodiment, a drain hole 35 is formed on the bottom 32 side of the peripheral wall portion 33 of the protective cover 17 so as to be positioned vertically below the protective cover 17. Therefore, even if the inside of the protective cover 17 is submerged by a large amount of water, it can be reliably drained to the outside, so that the reliability and durability of the vehicle alternator can be improved.

  In addition, the protective cover 17 in the present embodiment has a simple structure in which the through hole 36 and the protrusion 37 are provided with respect to the conventional protective cover, and there is little change in the molding die for the protective cover 17. As a result, cost increases can be minimized.

Further, the protrusion 37 of the protective cover 17 is provided with a tapered portion 37a on the outer peripheral side so as to be tapered toward the tip. When attaching the protective cover 17 to the rear bracket 3, it is necessary to bring the through hole 36 of the protective cover 17 close to the rear bracket 3 while matching the position of the nut portion 29, but the tapered portion 37 a is provided. Since the inner peripheral portion of the protruding portion 30b and the tapered portion 37a first come into contact with each other and can serve as a guide when the protective cover 17 is attached, the attachment of the protective cover 17 can be improved.
Further, when a tapered portion (not shown) is provided on the inner peripheral side rather than the outer peripheral side of the protrusion 37, the outer peripheral portion of the nut portion 29 and the tapered portion first come into contact with each other when the protective cover 17 is brought close to the rear bracket 3. Can take the role of a guide.

  It should be noted that tapered portions may be provided on both the outer peripheral side and the inner peripheral side of the protruding portion 37. On the other hand, when the above-described tapered portion is not provided, the protruding portion 37 is prevented from becoming thin. As a result, the moldability of the protrusion 37 is not deteriorated.

Further, the protrusion 37 does not have to be provided on the entire circumference of the through hole 36, and may be at least a part, for example, only a portion facing vertically upward of the vehicle alternator 1.
In addition, in the said embodiment, although the projection part 37 and the protrusion part 30b are arrange | positioned through the space | gap so that a labyrinth structure may be formed between the protrusion part 37 and the protrusion part 30b, it is not restricted to this. In the case of the structure in which the protruding portion 37 is pressed into contact with the protruding portion 30b without being attached, the attachment of the protective cover 17 is deteriorated while the intrusion of water or dust can be more effectively suppressed.

  Further, the protrusion 37 provided in the through hole 36 of the protective cover 17 is configured to be disposed on the outer peripheral side of the nut portion 29 and on the inner peripheral side of the protruding portion 30b of the mold resin 30, but the present invention is not limited thereto. Instead, it may be arranged on the outer peripheral side of the protrusion 30b.

  In the above embodiment, the AC generator for a vehicle has been described. However, the present invention is not limited to this, and the same effect can be obtained when applied to a vehicular rotating electrical machine such as a vehicular motor or a vehicular generator motor.

  In addition, in the above-described embodiment, the peripheral wall portion 33 of the protective cover 17 is formed in a cylindrical shape, but is not limited thereto, and surrounds the rectifier 16 attached to the outer end surface of the rear bracket 3. Any cylindrical shape may be used.

4 Casing 8 Rotor 8b Rear side cooling fan 9 Stator 16 Rectifier 17 Protective cover 18 Harness clamp 19 Mounting bracket 22 Stator core 23 Stator winding 23a Lead wire 24 Positive side rectifier 25 Positive side heat sink 27b Conductor 28 Stud bolt (Mounting bolts)
30 Mold resin (insulating material)
30a Insertion hole 30b Protrusion part 32 Bottom part 33 Peripheral wall part 34 Intake hole 35 Drain hole 36 Through hole 37 Projection part 37a Taper part 44 Electrical wiring

Claims (8)

A rotor rotatably supported in the casing;
A stator core, and a stator winding wound around the stator core, the stator supported by the casing so as to surround the rotor;
A rectifier that has a positive-side heat sink on which a positive-side rectifying element is mounted and that is disposed outside the casing on one side in the axial direction and rectifies AC power generated in the stator winding;
The casing has a bottomed cylindrical shape including a bottom portion in which a through hole is formed and a cylindrical peripheral wall portion, and has a protruding portion protruding in an opening direction from a peripheral portion of the through hole, and covers the rectifier. A resin protective cover attached to the
A mounting bolt that is inserted into the through hole and is fixed to one side in the axial direction of the casing, and fixes the rectifier to the casing;
An insulating member having a protruding portion protruding toward the protective cover, and electrically insulating the mounting bolt and the positive-side heat sink;
A mounting bracket fixed to an extending portion of the mounting bolt from the through hole;
A resin harness clamp for fixing electrical wiring,
The rotating electrical machine for a vehicle according to claim 1, wherein the harness clamp is held by the mounting bracket, and the protruding portion and the protruding portion are disposed at a position overlapping with an axial direction of the mounting bolt.   The rotating electrical machine for a vehicle according to claim 1, wherein the projecting portion and the projecting portion are disposed via a gap.   The rotating electrical machine for a vehicle according to claim 1, wherein the protrusion and the protrusion are disposed in contact with each other.   4. The rotating electrical machine for a vehicle according to claim 1, wherein the insulating member includes an insertion hole through which the mounting bolt is inserted.   The rotating electrical machine for a vehicle according to any one of claims 1 to 4, wherein a joint portion of a dissimilar metal material is provided inside the protective cover. The rotor further comprises a cooling fan;
The intake hole for cooling the air inside the protective cover by the cooling fan is provided at a position facing the rectifier at the bottom of the protective cover. The rotating electrical machine for vehicles as described.   The vehicular rotating electrical machine according to any one of claims 1 to 6, wherein a drain hole is formed in the peripheral wall portion of the protective cover.   The vehicular rotating electrical machine according to any one of claims 1 to 7, wherein the protruding portion is provided with a tapered portion so as to be tapered toward the tip side.

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