FR3058846B1 - ROTATING ELECTRICAL MACHINE COMPRISING A ROTOR SHAFT AND A BEARING - Google Patents

Abstract

A rotating electrical machine (100) comprising: a rotor (2) rotating about an axis X, the rotor comprising a rotor shaft (3); a stator (50) surrounding the rotor (2); a casing (1) in which the stator (50) and the rotor (2) are disposed, and a bearing (20) comprising an inner ring (20a) and an outer ring (20b), the inner ring (20a) being integral with the shaft (3), the rotor shaft (3) being rotatably mounted with respect to the housing (1) via the bearing (20). It is provided that the electric machine comprises indexing means and fastening (218) the outer ring (20b) relative to the housing (1), the indexing and securing means comprising a locking member (204) provided with a first end (204a) and a first hole (214); ) to cooperate with the first end (204a) of the locking member (204).

Description

ROTATING ELECTRICAL MACHINE COMPRISING A ROTOR SHAFT AND A BEARING

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a rotating electrical machine for motor vehicles.

BACKGROUND TECHNOLOGY

In a known manner, the rotating electrical machines comprise two coaxial parts, namely a rotor and a stator surrounding the body of the rotor.

Referring to Figure 1, there is shown an example of such a rotating electrical machine referenced 100, in the case of an alternator with internal ventilation polyphase type for a motor vehicle with a combustion engine operating in alternator mode. Of course, the alternator may also be reversible and consist of an alternator-starter also operating in electric motor mode, in particular for starting the engine of the vehicle as described in document FR A 2,745,445 for the propulsion of the motor vehicle.

This machine 100 essentially comprises a housing 1 and, inside thereof, a rotor 2 integral in rotation with a central shaft 3, called a rotor shaft or shaft, and a stator 50 of annular shape. The stator 50 surrounds the rotor 2 with the presence of an air gap 110 and comprises a body 4 in the form of a pack of sheets with notches, for example of the semi-closed type, for mounting a stator winding 5 forming on each side of the stator body 4, at each axial end thereof, a front bun 51 and a rear bun 53 which project axially from two axial faces 101 and 102 of the stator body.

In other words, the rotating electrical machine comprises:

a rotor 2 rotating about an axis X - a stator 50 surrounding said rotor 2, the space between the rotor 2 and the stator 50 defining an air gap 110 of the machine and the notches of the stator 50 are for example open on the side of the gap.

This winding 5 comprises for example a set of three-phase star or delta windings, the outputs of which are connected to a rectifier bridge, partially visible at 52, comprising rectifying elements such as diodes or MOSFET transistors, especially when the machine consists of an alternator-starter.

For example, the windings of the winding 5 are obtained using a continuous, electrically conductive wire coated with an electrically insulating layer, such as enamel, and mounted in the respective notches of the body 4 of the stator 50. via notch insulators (not visible).

It is also possible that the winding 5 has pins also called "conductor segment" or "u-pin" according to Anglo-Saxon terms well known to those skilled in the art.

According to one variant, the winding 5 comprises two sets of three-phase windings to form a device for composite stator windings, the windings being shifted by thirty electric degrees, as described for example in the documents US-A1-2002 / 0175589, and FR -A-2784248. In this case, two rectifier bridges are provided and all combinations of three-phase star and / or delta windings are possible. In a variant, the stator winding is of the pentaphase type. In general, the alternator is of the polyphase type and the rectifier bridge or bridges make it possible, in particular, to rectify the alternating current produced in the windings of the stator 50 into a direct current, in particular for charging the battery of the motor vehicle and supplying the loads and electrical consumers of the on-board network of the motor vehicle.

The rotor 2, of annular shape, is made in the example shown in the form of a claw rotor, as described for example in the documents US-A1-2002 / 01 75589, comprising two pole wheels 7,8 here axially juxtaposed and each having an annular transverse flange provided at its outer periphery with claws 9.

Each claw 9 has a rooting section of transverse orientation in the plane of the flange concerned. This rooting section is extended at its outer periphery by a claw tooth of generally axial orientation with presence of a chamfer between the claw tooth and the rooting section.

The claw teeth are generally trapezoidal or triangular. The claw teeth of a pole wheel 7, 8 are directed axially towards the flange of the other pole wheel 8, 7; the claw tooth of a wheel 7, 8 penetrating the space between two adjacent claw teeth of the other wheel 8, 7 so that the claw teeth of the wheels 7, 8 are interleaved. For more details, see EP 051 5 259.

An excitation winding 10 is implanted axially between the flanges of the wheels 7, 8. It is carried by a rotor portion 2 in the form of a cylindrical annular core coaxial with the shaft 3. The core of FIG. two axially distinct sections each of which is made integrally with a polar wheel 7, 8 associated. According to a variant not shown, the central core consists of a single piece and is distinct from the pole wheels 7, 8 which are arranged axially on either side of the core.

The winding 10 is thus implanted in the space delimited radially by the claws 9 of the wheels 7,8 and the central core.

The wheels 7, 8 and the core are preferably of ferromagnetic material and are traversed coaxially by the rotor shaft 3 also made of ferromagnetic material. These wheels 7, 8 are integral with the shaft 3. For this purpose, each wheel 7, 8 comprises a central bore which passes axially through the flange and extends the bore of the part of the core concerned. The shaft 3 has knurled portions (not referenced) and is force-fitted into the aforementioned bores of the core and the wheels 7, 8 so that it cuts grooves through its knurled portions. The shaft 3 is thus integral in rotation and axially wheels, a spacer, not referenced, being interposed between the wheel 7 and a bearing 19 described below. The axis of the shaft 3 constitutes the X axis of the machine. The winding wire 10 is wound on a support of electrically insulating material (not shown) mounted, preferably by force, on the outer periphery of the core.

When the excitation winding 10 is activated, that is to say electrically powered, the wheels 7, 8 and the core are magnetized and the rotor 2 becomes an inductor rotor with the formation of magnetic poles at the claws 9 wheels 7, 8.

This inductor rotor 2 creates an alternating induced current in the stator 50 when the shaft 3 rotates.

Furthermore, it is also known from the state of the art, rotating electrical machines that include a different type of rotor than the claw rotor. For example, the rotor 2 may comprise a body formed by a stack of sheet sheets held in package form by means of a suitable fastening system, such as rivets passing axially through the rotor. The rotor may in particular comprise poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor, as described for example in document EP0803962. The shaft 3 of the rotor 2 carries at its front end a movement transmission member 12, here a pulley 12 belonging to a device for transmitting movements through at least one belt (not shown) between the alternator and the engine of the motor vehicle. This shaft carries at its rear end slip rings 13 connected by wire bonds (not shown) to the ends of the excitation winding 10 of the rotor 2.

Alternatively the pulley 12 is replaced by a gear and the transmission device is chain and / or gear.

Brushes belong to a brush holder shown generally at reference 14 and they are arranged so as to rub on the slip rings 13, to supply the winding 10 with electrical current. The brush holder 14 is connected to a voltage regulator (not shown).

The casing 1 in which are placed the rotor 2 and the stator 50 is here in two parts, namely a front flange 16 adjacent to the pulley 12 and a rear flange 17 carrying the brush holder 14 and most often the bridge or bridges rectifiers and the voltage regulator, the rectifier bridge or bridges and the voltage regulator forming an electronic part of the machine. The flanges 16, 17 of annular shape, for example based on aluminum, are hollow in shape and each bear a central ball bearing respectively 19 and 20 for the rotational mounting of the shaft 3 of the rotor 2. The flanges are assembled together with tie rods or screws as shown for example in Figure 1 of EP 0515 259 supra. In other words, the casing 1 of the machine 100 comprises the front flange 16 also called front bearing and the rear flange 17 also rear bearing.

As illustrated in FIG. 1, an elastic system for filtering vibrations can be provided at the outer periphery of the stator body 4, in the form of a sheet package, with a flat gasket 40 at the front and rear buffers 41, flexible and thermally conductive resin being interposed between the front flange and the stator body to remove heat.

In a variant, no seals are provided. In all cases the stator is fixedly carried by the casing 1, while the rotor 2 is carried centrally rotatably by the casing 1 via the bearings 19, 20.

Alternatively the housing is in three parts, the flanges 16, 17 being disposed on either side of a central bearing carrying the stator body. The flanges are assembled to the intermediate portion for example by screwing. The alternator also comprises means for cooling it. For this purpose, in Figure 1, the flanges 16, 17 are perforated to allow the cooling of the alternator by air circulation and the rotor 2 carries at least at one of its axial ends a fan for providing this. air circulation. Here a first fan 23 is provided on the front end face of the rotor 2 and a second fan 24 on the rear face of the rotor 12.

Each fan 23, 24 is of annular shape and is provided with a plurality of blades 26 and is fixed on the outer radial faces of the flanges of the wheels 7, 8.

The fans are for example metallic and are obtained with their blades 26 by cutting and folding. The fans 23, 24 are for example centrifugal or helico-centrifugal type.

Referring to Figure 1, the air is drawn through openings 60 of the front flange surrounding the pulley 12 at the front of the flange and is mainly ejected centrifugally by the blades 26 and passes into the space between the front bun 51 and the front flange 16 to cool the front bun and finally out through openings 61 on the outer radial periphery of the front flange. The rear flange 17 also has a plurality of air inlet and outlet ports.

It is also known from the state of the art, rotating electrical machines that are cooled by a liquid as described in FR2717638. In FIG. 1, the brush holder 14 and the voltage regulator, integral with the flange 17, are capped by a cover 70, integral with the rear flange 17, being fixed here on the latter by snapping onto studs 71 integral with the flange. back. This cover 70 also has air intake orifices, not visible in FIG. 1.

The rotating electrical machine may take the form of an alternator, as described for example in EP 0 803 962 and WO 02/093717, or an electric motor as described for example in EP 0 831 580. The Alternator may be reversible as described for example in WO 01/69762, WO 2004/040738, WO 2006/129030 and FR 3,005,900.

Such a reversible alternator is called alternator-starter. It makes it possible, on the one hand, to transform mechanical energy into electrical energy when it operates in alternator mode, in particular to power consumers and / or recharge a battery and, on the other hand, to transform electrical energy into energy. mechanical when operating in electric motor mode for including start a heat engine such as that of a motor vehicle or to participate in the propulsion of the motor vehicle.

In any case, when these rotating electrical machines are used in motor mode, their control performed for example by the electronic part may require to have precise information on the angular position of the rotor relative to the stator.

For this purpose, it is possible to use rotor angular position detectors. These rotor angular position detectors comprise, for example, an annular target mounted on a target holder integral in rotation with the rotor or the shaft of the machine, and at least one stationary sensor, for example of Hall type, disposed near the target.

The target has a magnetic field which varies on its periphery so that under the effect of the rotation of the target the magnetic field received by the at least sensor varies.

The at least one sensor is connected to an electronic management and control device, and transmits thereto signals according to the magnetic fields received, this device processing said signals to deduce the angular position and the speed of the rotor. There are other types of rotor angular position detectors, for example of resolver type or angular sensor type known to those skilled in the art. However, it is in all cases a sensor that receives a magnetic field from a target.

This type of machine gives satisfaction nevertheless it may be desirable to further improve it.

Indeed, the mounting of ball bearings 19 and 20 is not always simple. In particular, the inner ring of the rear ball bearing 20 is tightly mounted on the shaft 3. This implies that this bearing is very important, so that it is not possible to mount the outer ring of the bearing in the housing tightly. .

As a result, there may be a problem on the outer race of the bearing. More specifically, the outer ring may in particular have a small rotational movement about the axis X relative to the housing.

This movement is particularly detrimental in the case where the rotating electrical machine comprises a rotor angular position detector.

Indeed, the rotor angular position detector comprises a sensor linked to the outer ring of the rear ball bearing 20 and a target linked to the inner ring of the rear ball bearing 20, so that the slight movement of the outer ring around the X axis relative to the housing will disturb the angular position detected by this detector.

There is therefore a need for a rear bearing which is indexed in rotation in the housing so as to eliminate the rotation of its outer ring about the X axis relative to the housing and exerting moderate mechanical stresses on the bearing.

OBJECT OF THE INVENTION The object of the invention is to meet this wish while at the same time remedying at least one of these aforementioned drawbacks.

According to the invention there is provided a rotating electrical machine comprising: a rotor rotating about an axis X, the rotor comprising a shaft; a stator surrounding the rotor; a casing in which are arranged the stator and the rotor, and a bearing comprising an inner ring and an outer ring, the inner ring being integral with the shaft, the shaft being rotatably mounted with respect to the casing via the bearing.

According to a general characteristic, the rotating electrical machine comprises means for indexing and securing the outer ring relative to the housing, the indexing and securing means comprising a locking member provided with a first end and a first hole. to cooperate with the first end of the locking member.

Thus, with firstly a first hole arranged on the outer ring or on a component connected to the outer ring, the first end of the locking member cooperating with the first hole, and on the other hand the member of blocking which is for example linked to the housing, it can lock in rotation the outer ring relative to the housing. This is advantageous because with the machines of the state of the art when the rotor rotates at speeds of the order of several thousand revolutions per minute, small displacements of the outer ring relative to the casing are possible. These include rotational movements around the X axis.

In any case, it is an alternative to the tight fitting of the outer ring inside the housing. Indeed, this tight assembly involves mechanical stresses on the bearing too important. According to this alternative, it is thus possible to provide a mechanical assembly avoiding rotation around the X axis and which exerts little mechanical stress on the bearing.

By cooperation of an end with a hole or a groove is meant the fact that the end is received in the hole or the groove so that the component in which the hole is arranged is locked in rotation with respect to the blocking at least one axis relative to the end.

By indexing and securing of the outer ring with respect to the casing is meant, for example the fact that the outer ring can not rotate about the X axis relative to the casing so that their relative positions in rotation about the axis X are fixed.

According to other characteristics taken separately or in combination: the locking member is molded in the housing so that its first end comes from the housing and forms a nipple cooperating with the first hole. This is an embodiment that has good durability and is easy to implement when molding the housing. For example, the housing comprises three parts, namely a central seat, a front flange and a rear flange. According to this example, the locking member may be molded in the rear flange of the housing.

In addition, it is no longer necessary to provide a hole in the housing, which can allow a second housing more resistant. the locking member comprises a second end, said second end being able to cooperate with a hole or a groove.

Thus, the locking member comprises two ends and is interposed between a first hole that can be arranged on the outer ring or on a component attached to the outer ring and a hole or a groove. the machine comprises a positioning capsule for positioning the outer ring relative to the housing, the bearing being disposed in the capsule and the indexing and securing means comprise a second hole arranged in the capsule to cooperate with the second end of the housing; blocking member.

This positioning capsule avoids to mount tightly the outer ring of the bearing in the housing while allowing positioning of the bearing relative to the housing. It therefore reduces the forces on the bearing and in particular on its outer ring.

However, since the bearing is, for example, slidably mounted in the capsule, this capsule makes it impossible, without the securing and indexing means, to block the rotation of the bearing relative to the casing.

According to this embodiment, with a second hole on the capsule, the connection between the second hole and the second end of the locking member can lock in rotation about the axis X the outer ring relative to the capsule.

Thus by receiving the first end in the outer ring or in a component bound to the outer ring and the second end in the capsule is secured and indexed the outer ring relative to the capsule. For example, the capsule is locked in rotation relative to the housing so that the outer ring can be locked in rotation relative to the housing. the indexing and securing means comprise a second hole arranged in the housing to cooperate with the second end of the locking member.

This is an embodiment for directly indexing the outer ring relative to the housing as long as the first end cooperates with a first hole in the outer ring or in a component connected to the outer ring.

According to a first example of this embodiment, the indexing and securing means comprise a single second hole arranged in the housing.

According to a second example of this embodiment, the indexing and securing means comprise two second holes, one in the housing and another in the capsule. In this case, the second end cooperates with the two second holes, that is to say that the second end will be received in the second two holes. For this, it can, for example, through the second hole of the capsule to reach the second hole of the housing. the indexing and securing means comprise a groove arranged in the housing to cooperate with the second end of the locking member.

According to a first example of this embodiment, the indexing and securing means comprise a groove formed in the housing without necessarily a second hole in the capsule.

According to a second example of this embodiment, the indexing and securing means comprise a groove formed in the housing and a second hole formed in the capsule. In this case, the second end cooperates with the second hole and the groove, that is to say that the second end will be received in the second hole and the groove. For this, it can, for example, cross the second hole to get to the groove. the casing comprises an overmoulded part and the indexing and securing means comprise a second hole arranged in said overmolded part to cooperate with the second end of the locking member.

Thus, instead of providing the second hole in the housing, it is expected to overmould a part in the housing and it is in this overmolded room that will be arranged a second hole. It is no longer necessary to provide the second hole in the housing, which may allow a second housing more resistant and a second hole easier to achieve.

According to a first example of this embodiment, the indexing and securing means comprise a single second hole formed the overmolded part.

According to a second example of this embodiment, the indexing and securing means comprise two second holes, one in the overmoulded part and another in the capsule. In this case, the second end cooperates with the two second holes, that is to say that the second end will be received in the second two holes. For this, it can, for example, through the second hole of the capsule to reach the second hole of the overmolded part. the rotating electrical machine comprises a housing mounted on the outer ring of the bearing and a rotor angular position detector, the detector comprises a sensor linked to the outer ring and a target linked to the inner ring, said rotor angular position position detector being disposed in the housing.

This embodiment is advantageous because the rotational locking of the outer ring relative to the housing makes it possible, in the case where a rotor position detector is used, to significantly improve the accuracy of the position detected. the housing comprises a sleeve accommodating wires for the angular position detector, said first hole being arranged in the sleeve.

Thus, the sleeve being a component of the housing itself mounted on the outer ring of the bearing, the first hole is formed in a component connected to the outer ring. So that, in this case, by cooperating the first end with the first hole, can be indexed and secure the outer ring relative to the locking member. the locking member is a peg, a screw or a rivet.

These are embodiments that are easy to implement, using blocking members for simple components.

BRIEF DESCRIPTION OF THE FIGURES Other characteristics and advantages of the invention will appear on examining the detailed description of embodiments and embodiments, in no way limiting, and the appended drawings in which: FIG. 1, already described , is a section of an electric machine according to the state of the art; FIG. 2 is a perspective view of an electric machine according to one embodiment of the invention; FIG. 3 is a perspective view of a portion of the electrical machine according to one embodiment of the invention; FIG. 4 is a perspective bottom view of a portion of the electrical machine according to one embodiment of the invention; FIG 5 is a section of a portion of the electric machine according to one embodiment of the invention; and FIG. 6 is a section of a part of the electric machine according to one embodiment of the invention.

Identical, similar or similar elements retain the same reference from one figure to another.

DESCRIPTION OF EXAMPLES OF EMBODIMENT OF THE INVENTION

Figure 2 is a perspective view of an electric machine according to one embodiment of the invention.

As can be seen in FIG. 2, the electrical machine 100 comprises a housing 1. For example, the housing 1 comprises a front flange 16, a central seat 200 and a rear flange 17. The casing 1 is covered with a hood 70 for example plastic in which is disposed the electronic part of the electric machine.

Provision is made in the housing 1, a rotor 2 and a stator 50 similar to those of the state of the art described with reference to Figure 1.

For example, the stator may be disposed within the central span 200 which will thus carry the stator body 4. In addition, the stator 50 may surround the rotor 2.

In other words, the machine 100 comprises: a rotor 2 rotating about an axis X, the rotor comprising a rotor shaft 3 also called shaft 3; a stator 50 surrounding the rotor 2; a casing 1 in which the stator 50 and the rotor 2 are arranged.

Furthermore, the machine 100 includes two receptacles 201 and 202 for the circulation of a cooling liquid of the electric machine 100.

Figure 3 is a perspective view of a portion of the electric machine 100 according to one embodiment of the invention. In this view, the hood 70 and the rear flange 17 are removed so that it can be seen that the electric machine 100 comprises a positioning capsule 211.

The positioning capsule 211 comprises a pin 207 whose operation will be explained in the following figure. The function of the positioning capsule 211 is to be able to position a bearing 20 (not visible in FIG. 3) relative to the casing 1 as explained in FIGS. 5 and 6.

The electrical machine 100 comprises a housing 209, this housing 209 further comprising a sleeve 206 which accommodates a tube 205.

It can also be seen in FIG. 3 that the electric machine comprises a locking member 204.

Figure 4 is a bottom perspective view of a portion of the electric machine according to one embodiment of the invention. In this figure, it can be seen that the flange 17 comprises a bearing surface 219.

The capsule 211 is mounted in the bearing surface 219 which comprises a notch 208 to cooperate with the pin 207 of the positioning capsule 211. Thus, the positioning capsule 211 is locked in rotation about the axis X with respect to the casing 1.

Furthermore, the axial displacement of the capsule 211 relative to the casing 1 may be limited because in a first axial direction it bears on the bearing 20 and in the other axial direction the lug 207 of the capsule 211 is maintained by the notch 208.

Figure 5 is a sectional view of a portion of the electric machine 100 according to one embodiment of the invention.

The electrical machine comprises a stator 50 provided with a stator body 4. In the notches of the stator body 4 is housed a winding comprising wires or output notches 210 for connecting the winding to the electronic part of the machine. This electronic part is arranged in the cover 70.

In FIG. 5, the bearing 20 can be seen by means of which the rotor shaft 3 is rotatably mounted relative to the casing 1. This bearing comprises an inner ring 20a and an outer ring 20b, the inner ring 20a being integral with the casing 20. 3. For example the inner ring 20a is tightly mounted on the shaft 3.

The bearing 20 can be slidably mounted in the positioning capsule 211 via its outer ring 20b. The bearing and its outer ring are thus positioned relative to the casing 1 and in particular with respect to the bearing surface 219. In addition, the bearing 20 is housed in the positioning capsule 211.

It can be seen in FIG. 5 that the housing 209 accommodates a rotor angular position detector 215. More specifically, the housing 209 comprises a frame 203, for example made of metal or steel, forming a housing for the angular position detector 215. 203 is mounted on the outer ring of the bearing 20b. Thus, the housing 209 is mounted on the outer ring of the bearing 20b.

The rotor angular position detector 215 comprises a sensor 212 connected to the outer ring 20b and a target 213 connected to the inner ring 20a.

The sleeve 206 is for example made of plastic and comprises a first portion 206.1 circular mounted on the frame 203 of the housing and a second portion 206.2 having the shape of a rectangular parallelepiped.

The sleeve 206 accommodates the son of the detector. More specifically, the second portion 206.2 of the sleeve accommodates the tube 205 in which are disposed the son of the angular position detector 215.

FIG. 5 also illustrates the indexing and securing means 218 of the outer ring 20b with respect to the casing 1. These indexing and securing means 218 are described in more detail according to one embodiment in FIG. a section of a portion of the electric machine according to one embodiment of the invention.

The indexing and securing means 218 comprise the locking member 204 provided with a first end 204a and a first hole 214, the first end 204a cooperating with the first hole 214.

As illustrated in Figure 6, the sleeve 206 may comprise the first hole 214. For example, this first hole 214 is formed in the second portion 206.2 of the sleeve.

Thus, the housing 209 being mounted on the outer race 20b of the bearing, the first end 204a of the locking member 204 can be made to cooperate with a first hole formed in a component which is connected in particular around the X axis with the outer ring 20b of the bearing 20.

It can be provided as illustrated in Figure 6 that the locking member 204 comprises a second end 204b, said second end 204b being adapted to cooperate with a hole or a groove.

In a first case, the capsule 211 comprises a second hole 216 for cooperating with the second end 204b of the locking member 204. In other words, the second hole 216 is arranged in the capsule 211.

According to a second case, the casing 1 comprises a second hole to cooperate with the second end 204b of the locking member 204. In other words, the second hole is arranged in the casing 1. It could also be provided that groove 217 is arranged in the casing 1 for example in the bearing surface 219 of the casing 1.

In a third case, illustrated in Figure 6, a second hole 216 is formed in the capsule and a groove 217 is arranged in the bearing surface 219 of the housing 1. It could also be provided that the capsule 211 and the casing 1 comprise each a second hole for cooperating with the second end 204b of the locking member 204.

According to this third case, the second end will be received in the second two holes or in a second hole and a groove. For this, it may, for example, through the second hole 216 of the capsule to reach the second hole of the housing or the groove 217 of the housing.

In all cases, the indexing and securing means 218 allow the second end 204b of the locking member 204 to cooperate with a hole or a groove formed in a component which is either the casing or is connected in rotation around the X axis with the crankcase. Indeed, as we have seen with reference to Figure 4, the positioning capsule 211 is locked in rotation about the axis X relative to the housing 1 with the pin 207 and the notch 208.

Thus, with firstly the first end 204a of the locking member 204 cooperating in a first hole 214 formed in a component bound in particular around the X axis with the outer ring 20b and with the other hand, the second end 204b of the locking member 204 cooperating with a second hole 216 or a groove 217 formed in a component which is either the casing 1 is rotatably connected about the axis X with the casing 1, one can block the rotation about the axis X of the outer ring 20b with respect to the casing 1.

This avoids that, especially when the rotor rotates at speeds of the order of several thousand revolutions per minute, small displacements of the outer ring relative to the housing are possible.

For example, the locking member 204 is a peg, a screw or a rivet.

According to another embodiment, not illustrated in FIG. 6, the locking member 204 is molded in the casing 1 so that its first end 204a comes from the casing 1 and forms a stud cooperating with the first hole 214.

It could also be provided that the casing 1 comprises an overmoulded part, said overmoulded part being rotatably connected around the axis X with the casing and comprising a second hole for cooperating with the second end 204b of the locking member 204.

Claims (7)

1. Rotating electrical machine (100) comprising: a rotor (2) rotating about an axis X, the rotor comprising a shaft (3); a stator (50) surrounding the rotor (2); a casing (1) in which the stator (50) and the rotor (2) are disposed, and a bearing (20) comprising an inner ring (20a) and an outer ring (20b), the inner ring (20a). being integral with the shaft (3), the shaft (3) being rotatably mounted relative to the housing (1) via the bearing (20), characterized in that it comprises indexing and securing means (218 ) of the outer ring (20b) relative to the housing (1), the indexing and securing means comprising a locking member (204) provided with a first end (204a) and a first hole (214) for cooperating with the first end (204a) of the locking member (204), said locking member (204) being molded into the housing (1) so that its first end (204a) is from the housing (1) and forms a stud cooperating with the first hole (214). 2. A rotary electric machine (100) according to claim 1, characterized in that the locking member (204) comprises a second end (204b), said second end (204b) being adapted to cooperate with a hole or a groove. 3. Rotating electrical machine (100) according to claim 2, characterized in that the machine (100) comprises a positioning capsule (211) for positioning the outer ring (20b) relative to the housing (1), the bearing (20). ) being arranged in the capsule (211) and in that the indexing and securing means (218) comprise a second hole (216) arranged in the capsule (211) to cooperate with the second end (204b) of the locking member (204). 4. rotary electric machine (100) according to claim 2 or 3, characterized in that the indexing and securing means (218) comprise a second hole arranged in the housing (1) to cooperate with the second end (204b). the locking member (204). 5. Rotating electrical machine (100) according to claim 2 or 3, characterized in that the indexing and securing means (218) comprise a groove (217) arranged in the housing (1) to cooperate with the second end ( 204b) of the locking member (204). 8. rotary electric machine (100) according to claim 2 or 3, characterized in that the housing (1) comprises a molded part and in that the indexing and securing means (218) comprise a second hole arranged in said overmolded piece for cooperating with the second end (204b) of the locking member (204). 7, rotary electric machine (100) according to one of the preceding claims, characterized in that it comprises a housing (209) mounted on the outer ring of the bearing (20b) and a rotor angular position detector (215), the detector comprises a sensor (212) connected to the outer ring and a target (213) connected to the inner ring (20a), said rotor angular position position detector (215) being disposed in the housing (209). 8, electrical rotary machine (100) according to the preceding claim, characterized in that the housing (209) comprises a sleeve (206) accommodating son for the angular position detector (215), iedit first hole (214) being arranged in the sleeve (206). 9, rotary electric machine (100) according to any one of claims 3 to 9, characterized in that the locking member (204) is a pin, a screw or a rivet.