WO2021245079A1 - Motor rotor, in particular for a fan motor of a motor vehicle heating, ventilation and/or air conditioning system - Google Patents

Motor rotor, in particular for a fan motor of a motor vehicle heating, ventilation and/or air conditioning system Download PDF

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Publication number
WO2021245079A1
WO2021245079A1 PCT/EP2021/064673 EP2021064673W WO2021245079A1 WO 2021245079 A1 WO2021245079 A1 WO 2021245079A1 EP 2021064673 W EP2021064673 W EP 2021064673W WO 2021245079 A1 WO2021245079 A1 WO 2021245079A1
Authority
WO
WIPO (PCT)
Prior art keywords
cup
shaft
washer
spacer
rotor
Prior art date
Application number
PCT/EP2021/064673
Other languages
French (fr)
Inventor
Saad Bennouna
Maurad Berkouk
Olivier Cheriaux
Original Assignee
Valeo Systemes Thermiques
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2021245079A1 publication Critical patent/WO2021245079A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • MOTOR ROTOR ESPECIALLY FOR A MOTOR VEHICLE HEATING, VENTILATION AND / OR AIR CONDITIONING FAN MOTOR
  • the present disclosure relates to the field of heating, ventilation and / or air conditioning installations for motor vehicles.
  • the present disclosure relates more specifically to a rotor of a fan motor of such a heating, ventilation and / or air conditioning installation, a fan equipped with such a rotor and a heating, ventilation and / or air conditioning installation, comprising a such fan.
  • a heating, ventilation and / or air conditioning installation which makes it possible to generate an air flow.
  • Such an installation makes it possible to manage the temperature and the distribution of the air flow created within the passenger compartment of a vehicle.
  • a heating, ventilation and / or air conditioning installation comprises, among other things, a motor-fan unit comprising an electric motor driving a fan wheel in rotation.
  • the electric motor is in particular electronically commutated, controlled by a power supply module.
  • An electronically commutated electric motor or brushless direct current motor (also known by the English name of "brushless"), comprises a set of a rotor and a stator, each carrying electromagnetic elements including the interaction generates the displacement of the rotor relative to the stator, and further the displacement of the fan wheel.
  • the electric motor has an external rotor and an internal stator, fixed to a support of the electric motor.
  • the outer rotor comprises in particular a metal cup (or carcass, from the English “yoke”), with a cylindrical outer edge inside which magnets are fixed, so as to surround the winding of the stator.
  • the cup conventionally has a cylindrical portion, radially internal, receiving the output shaft of the rotor. Between the cylindrical portion radially internal and the radially external cylindrical portion, the cup conventionally forms a generally planar portion.
  • the cup can vibrate according to its own modes of deformation, generating vibrations of the electric motor, when the latter is in operation. These vibrations can be transferred to the interior of the vehicle, generating a noticeable noise. Thus, when the fan is in operation, this noise can be annoying for the passengers of the vehicle.
  • the present invention aims to reduce the mechanical excitation of the cup in order to reduce the level of noise emitted during the operation of the electric motor.
  • the present invention provides a motor rotor, in particular for a motor-driven fan unit for a motor vehicle heating, ventilation and / or air conditioning installation, comprising:
  • the spacer helps to stiffen the cup to attenuate the noise emitted during the operation of the electric motor.
  • the motor rotor can include one or more of the following characteristics, taken alone or in combination:
  • the contact surface of the spacer with the cup is distant, in the axial direction of the shaft, from the contact surface of the spacer with the shaft;
  • the spacer comprises, preferably consists of, a washer;
  • the cup comprises an annular portion, normal to the axis of rotation of the shaft, and / or a frustoconical portion, the frustoconical portion and / or the annular portion, where appropriate, having openings separated by arms, the cup preferably comprising seven arms, the washer comprising radially extending fingers, preferably seven fingers, the fingers preferably being aligned with the arms of the cup, the fingers preferably extending in a plane normal to the axis of the tree ;
  • the washer forms a radially internal crown, the radially internal crown connecting together the radially internal ends of the fingers, the radially internal crown preferably extending in a plane normal to the axial direction of the shaft;
  • the washer forms a radially internal crown, the radially internal crown connecting together the radially internal ends of the fingers, the radially internal crown preferably extending in a plane normal to the axial direction of the shaft, and / or the washer comprises a radially outer ring connecting the radially outer ends of the fingers, the radially outer ring preferably extending in a plane normal to the axial direction of the shaft;
  • the rotor comprises a radially outer ring connecting the radially outer ends of the fingers, the radially outer ring preferably extending in a plane normal to the axial direction of the shaft, the radially outer ring having a height, measured along the direction axial shaft greater than or equal to 4 mm.
  • the washer comprises a frustoconical portion, the frustoconical portion preferably being radially internal with respect to the fingers;
  • the frustoconical portion has a cylindrical recess, receiving an annular portion of the cup;
  • the washer comprises a radially internal cylindrical portion, receiving the rotor shaft, the radially internal surface of the radially internal cylindrical portion preferably having slots;
  • the washer has a domed portion around the radially internal cylindrical portion; a height of the spacer, respectively of the washer, measured in the axial direction of the shaft, is greater than or equal to 8 mm, preferably greater than or equal to 9 mm;
  • the washer is made of metal or plastic, in particular polypropylene or polybutylene terephthalate, preferably filled with glass fibers;
  • the spacer comprises at least one damping element, the spacer preferably consisting of a washer and at least one damping element, fixed on the washer, the damping element being, more preferably, constrained against the cup;
  • the at least one damping element is made of elastomeric material, preferably of thermoplastic elastomer material, in particular of SEBS or EPDM, more particularly of Santoprene TM, or of silicone, the at least one damping element preferably having a hardness less than 40 Shore;
  • the at least one damping element has a compression ratio of between 20% and 30%;
  • the rotor comprises a plurality of damping elements each in the form of a pin, the pins preferably being distributed regularly around the shaft, each pin preferably being further received clamped in a hole of the washer, where applicable appropriate;
  • Each pin has a domed head and a rod received in the hole of the cup, the head having a diameter greater than the diameter of the rod;
  • the at least one damping element comprises fingers, each in contact with a finger of the washer and, preferably, an arm of the cup, each finger of the damping element preferably comprising a radial rib, received in a radial groove of the cup;
  • the at least one damping element comprises a radially inner ring in contact with the frustoconical portion, the radially inner ring of the damping element preferably comprising a circular rib, received in a circular groove of the cup;
  • a spacer is placed inside the cup and / or a spacer is placed outside the cup; - each spacer is in plane contact with the cup, the contact surface of the spacer with the cup preferably having a geometry of revolution, more preferably annular, the contact surface having, even more preferably, a sectional view : a width related to the external radius of the cup, greater than or equal to 0.05 and / or less than or equal to 0.1; and / or o a radially internal end, distant from the axis of rotation of the shaft by a distance, relative to the external radius of the cup, greater than or equal to 0.16 and / or less than or equal to 0.21 ; and / or o a radially outer end, distant from the axis of rotation of the shaft by a distance, relative to the outer radius of the cup, greater than or equal to 0.22 and / or less than or equal to 0.32 ;
  • each spacer is in plane contact with the cup, the contact surface of the spacer with the cup preferably having a geometry of revolution, more preferably annular, the spacer being in cylindrical contact with the shaft, in such a way that, in half-sectional view along a plane comprising the axis of rotation of the shaft: the contact surface of the spacer with the cup extends between a first point, radially internal, and a second point, radially outer; and o the contact surface of the spacer with the shaft extends between a first axial end, in the vicinity of the cup, and a second axial end, further from the cup than the first axial end;
  • the ratio between the distance between the first point and the first axial end, on the one hand, and the radius of the cup, on the other hand, is greater than or equal to 0.06 and / or less than or equal to 0, 08 and / or the angle formed by the straight line joining the first point and the first end, on the one hand, and the axis of the shaft, on the other hand, is greater than or equal to 30 ° and / or less or equal to 60 °;
  • the cup has a cylindrical portion, radially internal, the cylindrical portion preferably being fitted onto the shaft;
  • the rotor comprises magnets fixed on the cup, in particular on a cylindrical portion of the cup, preferably radially outer, the magnets being, more preferably, fixed on an inner face of the cylindrical portion.
  • an electric motor for a motor vehicle ventilation, air conditioning and / or heating installation fan comprising a rotor as described above in all its combinations, and a stator disposed radially inside the rotor cup.
  • a fan for a motor vehicle ventilation, air conditioning and / or heating installation comprising a motor as described above in all its combinations, and a fan wheel fixed to the rotor shaft.
  • a heating, ventilation and / or air conditioning installation for a motor vehicle comprising a fan as described above, in all its combinations, and at least one duct for guiding a flow of air created by the fan to a passenger compartment of a motor vehicle.
  • FIG. 1 schematically shows a side view of a ventilation device for a heating, ventilation and / or air conditioning installation of a motor vehicle
  • FIG. 2 is a schematic perspective view of an example of a motor that can be used in the ventilation device of FIG. 1;
  • FIG. 3 is a schematic view from a different perspective, of the example engine of Figure 2;
  • FIG. 4 is a sectional view of a sub-assembly which can be implemented in the ventilation device of FIG. 1; [0019] [Fig. 5] shows a detail of Figure 4;
  • FIG. 6 is a schematic perspective view of a first example of a spacer which can be implemented in the sub-assembly of FIG. 4;
  • FIG. 7 is a schematic view from below of a detail of the sub-assembly of FIG. 4;
  • FIG. 8 is a schematic perspective view of a second example of a spacer which can be implemented in the sub-assembly of FIG. 4;
  • FIG. 9 is a schematic view from a different perspective of the second exemplary spacer of Figure 8;
  • FIG. 10 is a sectional view of a second example of a sub-assembly which can be implemented in the ventilation device of FIG. 1;
  • FIG. 11 shows a detail of Figure 10
  • FIG. 12 is a schematic perspective view of a third example of a spacer, which can be implemented in the second example of a sub-assembly of FIG. 9;
  • FIG. 13 is a schematic view from a different perspective of the third example of a spacer
  • FIG. 14 is a schematic top view of the second sub-assembly of Figure 9, from which the fan wheel has been removed. Description of the embodiments
  • FIG 1 schematically illustrates a ventilation device 10 (or fan) for a heating, ventilation and / or air conditioning installation of a motor vehicle.
  • a heating, ventilation and / or air conditioning installation for a motor vehicle comprises an aeration circuit, a ventilation device 10 for moving the air in the ventilation circuit, and means for heating and / or means for cooling the flow of air set in motion by the ventilation device 10.
  • the ventilation device 10 essentially comprises, as illustrated, a fan wheel 12, an electric motor 14, and a support 16 for the electric motor 14.
  • the fan wheel 12 rotates about an axis of rotation A
  • the electric motor 14 is intended to drive in rotation around its axis A, the fan wheel 12.
  • the support 16 of the motor 14 is intended to allow the fixing of the ventilation device 10 in a motor vehicle, while limiting the transmission of air. vibrations generated by the electric motor 14 and / or the fan wheel 12 in the motor vehicle and / or external constraints towards the electric motor 14 and / or the fan wheel 12.
  • the support 16 of the motor 14 may in particular comprise two coaxial, rigid rings of axis A, interconnected by a decoupling element made of flexible elastomeric material.
  • the decoupling element between the inner ring and the outer ring can also take the form of a ring.
  • the inner ring may be intended to be fixed to the engine 14.
  • the outer ring may be intended to be fixed to a structural element of a vehicle ventilation installation.
  • the elastomeric material is, for example, polystyrene-b-poly (ethylene-butylene) -b-polystyrene or SEBS.
  • the electric motor 14 here forms a mechanical assembly comprising a rotating element 18, in this case the rotor 18 of the motor 14, a support 20 of the rotor 18 and a cover 22, fixed on the support 20 of the rotor 18.
  • the cover 22 is fixed on the support 20 of the rotor 18 by means of screws 24.
  • other fixing means can be implemented to fix the cover 22 on the support 20 of the rotor 18.
  • the rotor 18 is here an external rotor.
  • the stator 26 associated with the rotor 18 is disposed radially inside the rotor 18. More precisely, the magnets 27 of the rotor 18 are radially outward with respect to the coils of the stator 26.
  • the rotor 18 comprises a cup 28.
  • the cup 28 is symmetrical by rotation about the axis A corresponding to the axis of rotation of the electric motor 14.
  • the cup 28 comprises a first cylindrical portion 68, radially internal.
  • the first cylindrical portion 68 is fitted onto a shaft 30 of the rotor 18 to drive the shaft 30 in rotation.
  • the cup 28 comprises a second cylindrical portion 32, radially outer.
  • the magnets 27 of the rotor 18 are here fixed to the internal face of the second cylindrical portion 32.
  • the cup 28 further comprises an annular portion 70 which extends radially from the first cylindrical portion 68 towards the second cylindrical portion 32.
  • the annular portion 70 here extends generally in a plane normal to the axis A of rotation engine 14.
  • the cup 28 also comprises a frustoconical portion 75, radially outer relative to the annular portion 70.
  • the frustoconical portion 75 extends from the end of the annular portion 70.
  • the frustoconical portion 75 here connects the annular portion 70 to the second cylindrical portion 32.
  • the frustoconical portion 75 contributes in particular to stiffening the cup 28.
  • the cup 28 has openings 72.
  • the openings 72 further reduce the weight of the cup 28 and, also, to facilitate the cooling of the stator windings 26 received at the The interior of the cup 28.
  • the openings 72 are separated by arms 74.
  • the arms 74 extend radially, so that the arms 74 define substantially trapezoidal openings 72.
  • the openings 72 can be defined in the annular portion 70 and / or the frustoconical portion 75 of the cup 28.
  • the cup 28 comprises seven arms 74, separating seven openings 72. More generally, to limit the risks of occurrence. of natural modes of the cup 28 at relatively low frequencies, the cup 28 preferably comprises a prime number of arms 74. This number of arms 74 is preferably greater than or equal to seven.
  • the cup 28 also has radial grooves 38 on its outer surface.
  • the radial grooves 38 may extend over the annular portion 70 and / or the frustoconical portion 75.
  • the radial grooves 38 in particular each extend over a respective arm 74 of the cup 28.
  • Each radial groove 38 extends for example along a median line of the associated arm 74.
  • the cup 28 also has a circular groove 40, centered on the axis A of the cup 28.
  • the circular groove 40 here connects the radial grooves 38 together.
  • the circular groove 40 extends over the annular portion 70 of the cup 28.
  • the cup 28 may in particular have a thickness E28 less than or equal to 2.5 mm, preferably less than or equal to 2 mm.
  • the cup 28 may also have an outer radius R28, corresponding to the radius of the second cylindrical portion 32, greater than or equal to 46 mm and / or less than or equal to 50 mm, preferably less than or equal to 48 mm.
  • the cup 28 is for example made of metal.
  • the support 20 of the rotor 18 here has a base 34.
  • the base 34 here extends generally in a plane normal to the axis A of rotation of the motor 14
  • a substantially cylindrical relief 36 extends from the base 34.
  • the relief 36 extends substantially in the direction of the axis A of rotation of the motor 14.
  • the relief 36 is hollow.
  • the relief 36 may in particular form one or two housings each receiving a rolling ring, in particular a ball bearing, intended to guide the rotation of the shaft 30 relative to the support 20.
  • a spacer 42 is here disposed between the cup 28 and the shaft 30 of the motor. Specifically, the spacer 42 is attached to the shaft 30 on the one hand and makes contact with the cup 28 on the other hand. The spacer 42 thus makes it possible to stiffen the cup 28, and to limit its vibrations.
  • the spacer 42 here has rotational symmetry.
  • the contact area of the spacer 42 with the cup 28 is thus, in the example of Figure 4, also rotationally symmetrical.
  • the spacer thus makes it possible to limit, or even prevent, the tilting movements of the cup 28 about axes perpendicular to the axis A of rotation of the shaft 28.
  • the spacer 42 is shaped so that the contact area of the spacer 42 on the cup 28 is substantially flat.
  • the spacer 42 is disposed inside the cup 28.
  • the spacer 42 consists of a washer 43.
  • the washer 43 firstly comprises a crown 44 and fingers 46, the crown 44 being radially internal with respect to the fingers 46.
  • the radially internal crown 44 thus connects the radially internal ends 48 of the fingers 46.
  • the radially internal ring 44 and the fingers 46 of the washer 43 extend here generally in a plane normal to the axis A of rotation of the rotor 18.
  • the radially internal crown 44 and the fingers 46 of the washer 43 are in plane contact with the annular portion 70 of the cup 28.
  • the washer 43 has seven fingers 48.
  • the fingers 48 are aligned with the arms 74 of the cup 28.
  • the fingers 48 of the washer 43 can in particular make it possible to strengthen the arms 74 of the cup 28.
  • each finger 48 of the washer 43 can extend over at least a portion of the length of an arm 74 of the cup 28, associated.
  • the radially internal crown 44 and the fingers 46 define a contact surface 92 of the washer 43 with the annular portion 70 of the cup 28.
  • the contact surface 92 is rotationally symmetrical.
  • the contact surface 92 is in the form of a toothed wheel.
  • the contact surface 92 may have:
  • a width L92 related to the external radius R28 of the cup 28, L92 / R28, greater than or equal to 0.05 and / or less than or equal to 0.1;
  • a radially internal end P1 distant from the axis A of rotation of the shaft 30 by a distance D1, referred to the external radius R28 of the cup 28, D1 / R28, greater than or equal to 0.16 and / or less than or equal to 0.21; and or
  • a radially outer end P2 distant from the axis A of rotation of the shaft 30 by a distance D2, referred to the outer radius R28 of the cup 28, D2 / R28, greater than or equal to 0.22 and / or less than or equal to 0.32.
  • the washer 43 comprises a cylindrical portion 50, radially internal.
  • the cylindrical portion 50 extends in the direction of the axis A of rotation of the shaft 30.
  • the cylindrical portion 50 is fixed to the shaft 30.
  • the cylindrical portion 50 is force-fitted on the shaft. 30.
  • the cylindrical portion 50 then defines a contact surface 94 of the washer 43 with the shaft 30, as seen in a longitudinal half-section plane:
  • the contact surface 94 extends in the direction of the axis A, between a first axial end P3, in the vicinity of the cup 28, and a second axial end P4, remote from the cup 28, such as the height D4 between the first and second axial ends P3, P4, referred to the external radius R28 of the cup 28, D4 / R28, is between 0.04 and 0.08; and or
  • the contact surface 94 of the washer 43 with the shaft 30 is distant from the contact surface 92 of the washer 43, with the cup 28, in the direction of the axis A, preferably by a distance D3, referred to the radius R28 of the cup 28, D3 / R28, between 0.06 and 0.08; and or
  • the washer 43 also has, according to the example illustrated in Figures 4 to 6, a domed portion 52 and an annular portion 53 such that the washer 43 consists, in the example illustrated, from the center of the washer 43 , in a cylindrical portion 50, an annular portion 53, a convex portion 52, the annular ring 44 and the fingers 46.
  • the convex 52 and annular portions 53 help to stiffen the washer 43.
  • the washer 43 here has a height H43, measured in the direction of the axis A of the shaft 30, greater than or equal to 8 mm, preferably greater than or equal to 9 mm.
  • the washer 43 is in particular made of metal.
  • the washer 43 can in particular be a stamped part.
  • the washer 43 as described may in particular have a thickness E43 greater than or equal to 1 mm, preferably greater than or equal to 1, 5 mm and / or less than or equal to 3 mm.
  • FIGs 8 and 9 illustrate a second example of a spacer 42.
  • the spacer 42 comprises a washer 43 and damping elements 54, intended to be interposed between the cup 28 and the washer 43.
  • the damping elements 54 limit the transmission of vibrations from the cup 28 to the washer 43 during operation of the engine 14.
  • the damping elements 54 limit the transmission of vibrations from the motor 14. washer 43 towards the cup 28 during the operation of the engine 14.
  • Each damping element 54 is constrained between the annular portion 70 of the cup 28 and the washer 43, in particular the radially internal crown 44 of the washer 43.
  • Each damping element 54 thus has a thickness E1, before being constrained between the cup 28 and the washer 43, between 2 mm and 4 mm.
  • Each damping element 54 also has a thickness E2, once constrained between the cup 28 and the washer 43, between 1.5 mm and 3 mm.
  • Each damping element 54 can thus have a compression ratio C of between 20% and 30%. By compression ratio C is meant here the ratio between:
  • each damping element 54 may consist of a pin 54.
  • the pins 54 are here regularly distributed around the axis A of rotation of the rotor 18.
  • a pin 54 is arranged on each of the fingers 46 of the washer 43. This allows the pins 54 to be placed as far as possible from the axis A of rotation of the rotor 18. It seems in fact that the effect of the pins 54, and more generally of the or damping elements 54, is all the more noticeable the more the latter is distant from the axis A of rotation of the rotor 18.
  • Each pin 54 here comprises a cylindrical head 58.
  • the diameter D58 of the cylindrical head 58 of each pin 54 is for example between 3 mm and 5 mm, preferably greater than 3.5 mm.
  • the cylindrical head 58 is intended to be in contact with the annular portion 70 of the cup 28.
  • Each pin 54 also comprises a rod 60.
  • Each rod 60 extends in the direction of the axis A of rotation of the rotor 18.
  • Each rod 60 has a diameter D60, less than the diameter D58 of the cylindrical head 58 associated .
  • Each rod 60 is received in a hole 62 of the washer 43, preferably constrained. The pawns 54 can thus be assembled on the washer 43 without requiring any attached fixing means, in particular without glue.
  • the pins 54 are here connected by a ring 64, with an axis of the axis A of rotation of the rotor 18.
  • the ring 64 makes it possible in particular to facilitate the handling of the pins 54.
  • the damping element (s) 54 are for example made of elastomeric material, preferably of thermoplastic elastomer material, in particular of SEBS or EPDM, more particularly of Santoprene TM, or of silicone.
  • the damping element (s) may have a hardness of less than 40 Shore.
  • FIGS 10 to 13 illustrate a third example of a spacer 42.
  • the spacer 42 is disposed outside the cup 28.
  • the spacer 42 is thus interposed between the fan 12 and the cup 28.
  • FIGs 10 to 13 illustrate an embodiment of the spacer 42, particularly suited to the case where the spacer 42 comprises a washer 43 of plastic material.
  • the washer 43 can in particular be made of polypropylene (or PP) or of poly (butylene terephthalate) (or PBT).
  • the plastic material, in particular PP or PBT, can be loaded with glass fibers.
  • the washer 43 comprises a radially internal crown 44, fingers 46 and a cylindrical portion 50, radially internal.
  • the cylindrical portion 50 has slots 80, oriented radially inward.
  • the slots 80 facilitate the fitting of the cylindrical portion 50 on the shaft 30, especially when the washer 43 is made of plastic material.
  • the washer 43 also comprises a frustoconical portion 56, between the cylindrical portion 50 and the fingers 46.
  • the frustoconical portion 56 extends over a surface of the radially internal crown 44 remote from the cup 28, substantially over the entire surface of the radially internal crown 44.
  • the frustoconical portion 56 here comprises a succession of projecting sectors 69, each aligned with a finger 46, and of recessed sectors.
  • the frustoconical portion 56 thus presents “waves”.
  • the protruding sectors 69 make it possible in particular to strengthen the fingers 46 of the washer 43.
  • the recessed sectors make it possible to limit the size and weight of the washer 43.
  • the washer 43 also comprises a radially outer ring 64.
  • the radially outer ring 64 connects the radially outer ends 82 of the fingers 46.
  • the radially outer ring 64 of the washer 43 extends here generally in a plane normal to the axis A of rotation of the rotor 18.
  • the radially outer ring 64 may have a height H64, measured in the direction of the axis A of rotation of the rotor 18, may be greater than or equal to 2 mm, preferably greater than or equal to 3 mm.
  • the radially outer ring 64 thus contributes to the balancing of the washer 43 and the cup 28, during operation of the engine 14.
  • the washer 43 also has a cylindrical recess 78, extending in the direction of the axis A of rotation of the motor 14.
  • the cylindrical recess 78 makes it possible to receive the first cylindrical portion 68 of the cup 28.
  • the cylindrical recess 78 thus allows compact mounting of the spacer 42.
  • the spacer 42 also comprises a damping element 54, here unique, interposed between the washer 43 and the cup 28.
  • the damping element 54 can in particular be molded onto the washer 43.
  • the element d The damping 54 is also constrained between the washer 43 and the cup 28.
  • the compression ratio of the damping element 54, interposed between the washer 43 and the cup 28, may be the same as that indicated above.
  • the damping element 54 can also be made of the same material as that described above.
  • the damping element 54 here comprises fingers 86 and a crown 84, radially internal relative to the fingers 86.
  • the fingers 86 extend substantially to the level of the crown. radially outer 64 of the washer 43.
  • the fingers 86 of the damping element 54 are aligned with the fingers 46 of the washer 43.
  • the fingers 86 of the damping element 54 are furthermore in plane contact with the fingers 46 and the radially outer crown 64 of the washer 43.
  • the damping element 54 further comprises radial ribs 88 and a circular rib 90, here connecting the radial ribs 88.
  • the radial ribs 88 and the circular rib 90 of the damping element 54 are complementary to reliefs on the outer surface of the cup 28.
  • the invention is not limited to the examples presented above but is, on the contrary, susceptible to numerous variants accessible to those skilled in the art.
  • the device 10 may include two spacers 42, on either side of the cup 28. Then, the rigidity of the cup 28 can be further increased to limit the vibrations of the cup during operation of the engine. 14.
  • the damping element (s) 54 can be overmolded on the washer. In these cases, the cushioning element (s) is / are easier to handle and the mounting of the ventilation device is facilitated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A motor rotor (18), in particular for a fan motor unit of a motor vehicle heating, ventilation and/or air conditioning system, comprises: - a shaft (30) mainly extending in an axial direction (A), - a cup (28) rigidly attached to the shaft (30); and - at least one spacer (42) attached to the shaft (30), the spacer (42) being in contact, preferably planar contact, with the cup (28).

Description

ROTOR DE MOTEUR, NOTAMMENT POUR MOTEUR DE VENTILATEUR D’INSTALLATION DE CHAUFFAGE, VENTILATION ET/OU CLIMATISATION DE VEHICULE AUTOMOBILE MOTOR ROTOR, ESPECIALLY FOR A MOTOR VEHICLE HEATING, VENTILATION AND / OR AIR CONDITIONING FAN MOTOR
Domaine technique Technical area
[0001] La présente divulgation relève du domaine des installations de chauffage, ventilation et/ou climatisation de véhicule automobile. La présente divulgation vise plus précisément un rotor d’un moteur de ventilateur d’une telle installation de chauffage, ventilation et/ou climatisation, un ventilateur équipé d’un tel rotor et une installation de chauffage, ventilation et/ou climatisation, comprenant un tel ventilateur. The present disclosure relates to the field of heating, ventilation and / or air conditioning installations for motor vehicles. The present disclosure relates more specifically to a rotor of a fan motor of such a heating, ventilation and / or air conditioning installation, a fan equipped with such a rotor and a heating, ventilation and / or air conditioning installation, comprising a such fan.
Technique antérieure Prior art
[0002] Les véhicules automobiles sont couramment équipés d’une installation de chauffage, ventilation et/ou climatisation, qui permet de générer un flux d'air. Une telle installation permet de gérer la température et la distribution du flux d’air créé, au sein de l'habitacle d’un véhicule. Une telle installation de chauffage, ventilation et/ou climatisation comporte, entre autres, un groupe moto-ventilateur comprenant un moteur électrique entraînant en rotation une roue de ventilateur. Le moteur électrique est notamment à commutation électronique, piloté par un module d'alimentation. [0002] Motor vehicles are commonly equipped with a heating, ventilation and / or air conditioning installation, which makes it possible to generate an air flow. Such an installation makes it possible to manage the temperature and the distribution of the air flow created within the passenger compartment of a vehicle. Such a heating, ventilation and / or air conditioning installation comprises, among other things, a motor-fan unit comprising an electric motor driving a fan wheel in rotation. The electric motor is in particular electronically commutated, controlled by a power supply module.
[0003] Un moteur électrique à commutation électronique, ou moteur à courant continu sans balai (connu également sous la dénomination anglaise de « brushless »), comporte un ensemble d’un rotor et d’un stator, chacun porteur d'éléments électromagnétiques dont l'interaction génère le déplacement du rotor relativement au stator, et plus loin le déplacement de la roue de ventilateur. An electronically commutated electric motor, or brushless direct current motor (also known by the English name of "brushless"), comprises a set of a rotor and a stator, each carrying electromagnetic elements including the interaction generates the displacement of the rotor relative to the stator, and further the displacement of the fan wheel.
[0004] Classiquement, le moteur électrique a un rotor externe et un stator interne, fixé à un support du moteur électrique. Le rotor externe comprend notamment une coupelle (ou carcasse, de l’anglais « yoke ») métallique, avec un bord extérieur cylindrique à l’intérieur duquel sont fixés des aimants, de manière à entourer le bobinage du stator. La coupelle présente classiquement une portion cylindrique, radialement interne, recevant l’arbre de sortie du rotor. Entre la portion cylindrique radialement interne et la portion cylindrique radialement externe, la coupelle forme classiquement une portion globalement plane. Conventionally, the electric motor has an external rotor and an internal stator, fixed to a support of the electric motor. The outer rotor comprises in particular a metal cup (or carcass, from the English “yoke”), with a cylindrical outer edge inside which magnets are fixed, so as to surround the winding of the stator. The cup conventionally has a cylindrical portion, radially internal, receiving the output shaft of the rotor. Between the cylindrical portion radially internal and the radially external cylindrical portion, the cup conventionally forms a generally planar portion.
[0005] Néanmoins, il a été constaté que la coupelle peut vibrer selon ses modes propres de déformation, engendrant des vibrations du moteur électrique, lorsque celui-ci est en fonctionnement. Ces vibrations peuvent être transférées jusque dans l’habitacle du véhicule, ce qui génère un bruit perceptible. Ainsi, lorsque le ventilateur est en fonctionnement, ce bruit peut être gênant pour les passagers du véhicule. However, it has been found that the cup can vibrate according to its own modes of deformation, generating vibrations of the electric motor, when the latter is in operation. These vibrations can be transferred to the interior of the vehicle, generating a noticeable noise. Thus, when the fan is in operation, this noise can be annoying for the passengers of the vehicle.
[0006] Ce phénomène a notamment été constaté sur certaines applications particulières, à une vitesse de rotation du moteur de l’ordre de 2300 tr/min. À cette vitesse de rotation du moteur, la huitième fréquence harmonique de la coupelle, aux alentours de 300 Hz, est particulièrement audible. [0006] This phenomenon has been observed in particular in certain specific applications, at an engine speed of around 2300 rpm. At this engine speed, the eighth harmonic frequency of the cup, around 300 Hz, is particularly audible.
[0007] La présente invention vise à réduire l’excitation mécanique de la coupelle afin de diminuer le niveau de bruit émis lors du fonctionnement du moteur électrique. [0007] The present invention aims to reduce the mechanical excitation of the cup in order to reduce the level of noise emitted during the operation of the electric motor.
Résumé Summary
[0008] À cette fin, la présente invention propose un rotor de moteur, notamment pour groupe moto-ventilateur d’installation de chauffage, ventilation et/ou climatisation de véhicule automobile, comprenant : [0008] To this end, the present invention provides a motor rotor, in particular for a motor-driven fan unit for a motor vehicle heating, ventilation and / or air conditioning installation, comprising:
- un arbre s’étendant principalement selon une direction axiale, - a shaft extending mainly in an axial direction,
- une coupelle, solidaire de l’arbre ; et - a cup, integral with the tree; and
- au moins une entretoise, fixée à l’arbre, l’entretoise étant en contact, de préférence plan, avec la coupelle. - at least one spacer, fixed to the shaft, the spacer being in contact, preferably plane, with the cup.
[0009] Ainsi, avantageusement, l’entretoise contribue à rigidifier la coupelle pour atténuer le bruit émis lors du fonctionnement du moteur électrique. [0009] Thus, advantageously, the spacer helps to stiffen the cup to attenuate the noise emitted during the operation of the electric motor.
[0010] Selon des modes de réalisations particuliers, le rotor de moteur peut comporter une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison : According to particular embodiments, the motor rotor can include one or more of the following characteristics, taken alone or in combination:
- la surface de contact de l’entretoise avec la coupelle est distante, selon la direction axiale de l’arbre, de la surface de contact de l’entretoise avec l’arbre ; - the contact surface of the spacer with the cup is distant, in the axial direction of the shaft, from the contact surface of the spacer with the shaft;
- l’entretoise comporte, de préférence consiste en, une rondelle ; - la coupelle comprend une portion annulaire, normale à l’axe de rotation de l’arbre, et/ou une portion tronconique, la portion tronconique et/ou la portion annulaire, le cas échéant, présentant des ouvertures séparées par des bras, la coupelle comprenant de préférence sept bras, la rondelle comprenant des doigts s’étendant radialement, de préférence sept doigts, les doigts étant de préférence alignés avec les bras de la coupelle, les doigts s’étendant de préférence dans un plan normal à l’axe de l’arbre ; - The spacer comprises, preferably consists of, a washer; - the cup comprises an annular portion, normal to the axis of rotation of the shaft, and / or a frustoconical portion, the frustoconical portion and / or the annular portion, where appropriate, having openings separated by arms, the cup preferably comprising seven arms, the washer comprising radially extending fingers, preferably seven fingers, the fingers preferably being aligned with the arms of the cup, the fingers preferably extending in a plane normal to the axis of the tree ;
- la rondelle forme une couronne radialement interne, la couronne radialement interne reliant ensemble les extrémités radialement internes des doigts, la couronne radialement interne s’étendant de préférence selon un plan normal à la direction axiale de l’arbre ; - the washer forms a radially internal crown, the radially internal crown connecting together the radially internal ends of the fingers, the radially internal crown preferably extending in a plane normal to the axial direction of the shaft;
- la rondelle forme une couronne radialement interne, la couronne radialement interne reliant ensemble les extrémités radialement interne des doigts, la couronne radialement interne s’étendant de préférence selon un plan normal à la direction axiale de l’arbre, et/ou la rondelle comporte une couronne radialement externe reliant les extrémités radialement externes des doigts, la couronne radialement externe s’étendant de préférence selon un plan normal à la direction axiale de l’arbre ; - the washer forms a radially internal crown, the radially internal crown connecting together the radially internal ends of the fingers, the radially internal crown preferably extending in a plane normal to the axial direction of the shaft, and / or the washer comprises a radially outer ring connecting the radially outer ends of the fingers, the radially outer ring preferably extending in a plane normal to the axial direction of the shaft;
- le rotor comprend une couronne radialement externe reliant les extrémités radialement externes des doigts, la couronne radialement externe s’étendant de préférence selon un plan normal à la direction axiale de l’arbre, la couronne radialement externe ayant une hauteur, mesurée selon la direction axiale de l’arbre, supérieure ou égale à 4 mm. - the rotor comprises a radially outer ring connecting the radially outer ends of the fingers, the radially outer ring preferably extending in a plane normal to the axial direction of the shaft, the radially outer ring having a height, measured along the direction axial shaft greater than or equal to 4 mm.
- la rondelle comporte une portion tronconique, la portion tronconique étant de préférence radialement interne par rapport aux doigts ; the washer comprises a frustoconical portion, the frustoconical portion preferably being radially internal with respect to the fingers;
- la portion tronconique présente un évidement cylindrique, recevant une portion annulaire de la coupelle ; - The frustoconical portion has a cylindrical recess, receiving an annular portion of the cup;
- la rondelle comporte une portion cylindrique radialement interne, recevant l’arbre du rotor, la surface radialement interne de la portion cylindrique radialement interne présentant de préférence des créneaux ; - the washer comprises a radially internal cylindrical portion, receiving the rotor shaft, the radially internal surface of the radially internal cylindrical portion preferably having slots;
- la rondelle a une portion bombée autour de la portion cylindrique radialement interne ; - une hauteur de l’entretoise, respectivement de la rondelle, mesurée selon la direction axiale de l’arbre, est supérieure ou égale à 8 mm, de préférence supérieure ou égale à 9 mm ; - the washer has a domed portion around the radially internal cylindrical portion; a height of the spacer, respectively of the washer, measured in the axial direction of the shaft, is greater than or equal to 8 mm, preferably greater than or equal to 9 mm;
- la rondelle est en métal ou en plastique, notamment en polypropylène ou en polytéréphtalate de butylène, de préférence chargé en fibres de verre ; the washer is made of metal or plastic, in particular polypropylene or polybutylene terephthalate, preferably filled with glass fibers;
- l’entretoise comporte au moins un élément d’amortissement, l’entretoise consistant de préférence en une rondelle et au moins un élément d’amortissement, fixé sur la rondelle, l’élément d’amortissement étant, de préférence encore, contraint contre la coupelle ; - the spacer comprises at least one damping element, the spacer preferably consisting of a washer and at least one damping element, fixed on the washer, the damping element being, more preferably, constrained against the cup;
- le au moins un élément d’amortissement est en matériau élastomère, de préférence en matériau élastomère thermoplastique, notamment en SEBS ou EPDM, plus particulièrement en Santoprene™, ou en silicone, le au moins un élément d’amortissement ayant de préférence une dureté inférieure à 40 Shore ;- the at least one damping element is made of elastomeric material, preferably of thermoplastic elastomer material, in particular of SEBS or EPDM, more particularly of Santoprene ™, or of silicone, the at least one damping element preferably having a hardness less than 40 Shore;
- le au moins un élément d’amortissement a un taux de compression compris entre 20% et 30% ; - the at least one damping element has a compression ratio of between 20% and 30%;
- le rotor comprend une pluralité d’éléments d’amortissement chacun sous forme d’un pion, les pions étant de préférence repartis régulièrement autour de l’arbre, chaque pion étant de préférence encore reçu serré dans un trou de la rondelle, le cas échéant ; - the rotor comprises a plurality of damping elements each in the form of a pin, the pins preferably being distributed regularly around the shaft, each pin preferably being further received clamped in a hole of the washer, where applicable appropriate;
- chaque pion comporte une tête, bombée, et une tige reçue dans le trou de la coupelle, la tête ayant un diamètre supérieur au diamètre de la tige ; - Each pin has a domed head and a rod received in the hole of the cup, the head having a diameter greater than the diameter of the rod;
- les pions sont reliés ensemble par un anneau ; - the pawns are connected together by a ring;
- le au moins un élément d’amortissement comporte des doigts, chacun en contact avec un doigt de la rondelle et, de préférence, un bras de la coupelle, chaque doigt de l’élément d’amortissement comportant de préférence une nervure radiale, reçue dans une rainure radiale de la coupelle ; - the at least one damping element comprises fingers, each in contact with a finger of the washer and, preferably, an arm of the cup, each finger of the damping element preferably comprising a radial rib, received in a radial groove of the cup;
- le au moins un élément d’amortissement comporte une couronne radialement interne en contact avec la portion tronconique, la couronne radialement interne de l’élément d’amortissement comportant de préférence une nervure circulaire, reçue dans une rainure circulaire de la coupelle ; - the at least one damping element comprises a radially inner ring in contact with the frustoconical portion, the radially inner ring of the damping element preferably comprising a circular rib, received in a circular groove of the cup;
- une entretoise est disposée à l’intérieur de la coupelle et/ou une entretoise est disposée à l’extérieur de la coupelle ; - chaque entretoise est en contact plan avec la coupelle, la surface de contact de l’entretoise avec la coupelle étant de préférence à géométrie de révolution, de préférence encore annulaire, la surface de contact présentant, de manière encore plus préférée, vue en coupe : o une largeur rapportée au rayon externe de la coupelle, supérieure ou égale à 0,05 et/ou inférieure ou égale à 0,1 ; et/ou o une extrémité radialement interne, distante de l’axe de rotation de l’arbre d’une distance, rapportée au rayon externe de la coupelle, supérieure ou égale à 0,16 et/ou inférieure ou égale à 0,21 ; et/ou o une extrémité radialement externe, distante de l’axe de rotation de l’arbre d’une distance, rapportée au rayon externe de la coupelle, supérieure ou égale à 0,22 et/ou inférieure ou égale à 0,32 ; - A spacer is placed inside the cup and / or a spacer is placed outside the cup; - each spacer is in plane contact with the cup, the contact surface of the spacer with the cup preferably having a geometry of revolution, more preferably annular, the contact surface having, even more preferably, a sectional view : a width related to the external radius of the cup, greater than or equal to 0.05 and / or less than or equal to 0.1; and / or o a radially internal end, distant from the axis of rotation of the shaft by a distance, relative to the external radius of the cup, greater than or equal to 0.16 and / or less than or equal to 0.21 ; and / or o a radially outer end, distant from the axis of rotation of the shaft by a distance, relative to the outer radius of the cup, greater than or equal to 0.22 and / or less than or equal to 0.32 ;
- chaque entretoise est en contact plan avec la coupelle, la surface de contact de l’entretoise avec la coupelle étant de préférence à géométrie de révolution, de préférence encore annulaire, l’entretoise étant en contact cylindrique avec l’arbre, de telle sorte que, en vue en demi-coupe selon un plan comportant l’axe de rotation de l’arbre : o la surface de contact de l’entretoise avec la coupelle s’étend entre un premier point, radialement interne, et un deuxième point, radialement externe ; et o la surface de contact de l’entretoise avec l’arbre s’étend entre une première extrémité axiale, au voisinage de la coupelle, et une deuxième extrémité axiale, plus éloignée de la coupelle que la première extrémité axiale ; - each spacer is in plane contact with the cup, the contact surface of the spacer with the cup preferably having a geometry of revolution, more preferably annular, the spacer being in cylindrical contact with the shaft, in such a way that, in half-sectional view along a plane comprising the axis of rotation of the shaft: the contact surface of the spacer with the cup extends between a first point, radially internal, and a second point, radially outer; and o the contact surface of the spacer with the shaft extends between a first axial end, in the vicinity of the cup, and a second axial end, further from the cup than the first axial end;
- le rapport entre la distance entre le premier point et la première extrémité axiale, d’une part, et le rayon de la coupelle, d’autre part, est supérieur ou égale à 0,06 et/ou inférieur ou égal à 0,08 et/ou l’angle formé par la droite joignant le premier point et la première extrémité, d’une part, et l’axe de l’arbre, d’autre part, est supérieur ou égal à 30° et/ou inférieur ou égal à 60° ; - the ratio between the distance between the first point and the first axial end, on the one hand, and the radius of the cup, on the other hand, is greater than or equal to 0.06 and / or less than or equal to 0, 08 and / or the angle formed by the straight line joining the first point and the first end, on the one hand, and the axis of the shaft, on the other hand, is greater than or equal to 30 ° and / or less or equal to 60 °;
- la coupelle comporte une portion cylindrique, radialement interne, la portion cylindrique étant de préférence emmanchée sur l’arbre ; et - The cup has a cylindrical portion, radially internal, the cylindrical portion preferably being fitted onto the shaft; and
- le rotor comprend des aimants fixés sur la coupelle, notamment sur une portion cylindrique de la coupelle, de préférence radialement externe, les aimants étant, de préférence encore, fixés sur une face interne de la portion cylindrique. [0011] Selon un autre aspect, il est décrit un moteur électrique pour ventilateur d’installation de ventilation, climatisation et/ou chauffage de véhicule automobile, comprenant un rotor tel que décrit ci-avant dans toutes ses combinaisons, et un stator disposé radialement à l’intérieur de la coupelle du rotor. [0012] Selon encore un autre, il est décrit un ventilateur pour installation de ventilation, climatisation et/ou chauffage de véhicule automobile, comprenant un moteur tel que décrit ci-avant dans toutes ses combinaisons, et une roue de ventilateur fixée à l’arbre du rotor. the rotor comprises magnets fixed on the cup, in particular on a cylindrical portion of the cup, preferably radially outer, the magnets being, more preferably, fixed on an inner face of the cylindrical portion. According to another aspect, there is described an electric motor for a motor vehicle ventilation, air conditioning and / or heating installation fan, comprising a rotor as described above in all its combinations, and a stator disposed radially inside the rotor cup. According to yet another, there is described a fan for a motor vehicle ventilation, air conditioning and / or heating installation, comprising a motor as described above in all its combinations, and a fan wheel fixed to the rotor shaft.
[0013] Selon un dernier aspect, il est décrit une installation de chauffage, ventilation et/ou climatisation de véhicule automobile comprenant un ventilateur tel que décrit ci-avant, dans toutes ses combinaisons, et au moins un conduit pour guider un flux d’air créé par le ventilateur vers un habitacle de véhicule automobile. According to a last aspect, there is described a heating, ventilation and / or air conditioning installation for a motor vehicle comprising a fan as described above, in all its combinations, and at least one duct for guiding a flow of air created by the fan to a passenger compartment of a motor vehicle.
Brève description des dessins Brief description of the drawings
[0014] D’autres caractéristiques, détails et avantages apparaîtront à la lecture de la description détaillée ci-après, et à l’analyse des dessins annexés, sur lesquels : [0014] Other features, details and advantages will become apparent on reading the detailed description below, and on analyzing the accompanying drawings, in which:
[0015] [Fig. 1] représente schématiquement une vue de côté d’un dispositif de ventilation pour une installation de chauffage, ventilation et/ou climatisation d’un véhicule automobile ; [0015] [Fig. 1] schematically shows a side view of a ventilation device for a heating, ventilation and / or air conditioning installation of a motor vehicle;
[0016] [Fig. 2] est une vue schématique en perspective d’un exemple de moteur pouvant être mis en oeuvre dans le dispositif de ventilation de la figure 1 ; [0016] [Fig. 2] is a schematic perspective view of an example of a motor that can be used in the ventilation device of FIG. 1;
[0017] [Fig. 3] est une vue schématique selon une perspective différente, de l’exemple de moteur de la figure 2 ; [0017] [Fig. 3] is a schematic view from a different perspective, of the example engine of Figure 2;
[0018] [Fig. 4] est une vue en coupe d’un sous-ensemble pouvant être mis en oeuvre dans le dispositif de ventilation de la figure 1 ; [0019] [Fig. 5] représente un détail de la figure 4 ; [0018] [Fig. 4] is a sectional view of a sub-assembly which can be implemented in the ventilation device of FIG. 1; [0019] [Fig. 5] shows a detail of Figure 4;
[0020] [Fig. 6] est une vue schématique en perspective d’un premier exemple d’entretoise pouvant être mis en oeuvre dans le sous-ensemble de la figure 4 ; [0020] [Fig. 6] is a schematic perspective view of a first example of a spacer which can be implemented in the sub-assembly of FIG. 4;
[0021] [Fig. 7] est une vue schématique du dessous d’un détail du sous-ensemble de la figure 4 ; [0022] [Fig. 8] est une vue schématique en perspective d’un deuxième exemple d’entretoise pouvant être mis en oeuvre dans le sous-ensemble de la figure 4 ; [0021] [Fig. 7] is a schematic view from below of a detail of the sub-assembly of FIG. 4; [0022] [Fig. 8] is a schematic perspective view of a second example of a spacer which can be implemented in the sub-assembly of FIG. 4;
[0023] [Fig. 9] est une vue schématique selon une perspective différente du deuxième exemple d’entretoise de la figure 8 ; [0024] [Fig. 10] est une vue en coupe d’un deuxième exemple de sous-ensemble pouvant être mis en oeuvre dans le dispositif de ventilation de la figure 1 ; [0023] [Fig. 9] is a schematic view from a different perspective of the second exemplary spacer of Figure 8; [0024] [Fig. 10] is a sectional view of a second example of a sub-assembly which can be implemented in the ventilation device of FIG. 1;
[0025] [Fig. 11 ] représente un détail de la figure 10 ; [0025] [Fig. 11] shows a detail of Figure 10;
[0026] [Fig. 12] est une vue schématique en perspective d’un troisième exemple d’entretoise, pouvant être mis en oeuvre dans le deuxième exemple de sous- ensemble de la figure 9 ; [0026] [Fig. 12] is a schematic perspective view of a third example of a spacer, which can be implemented in the second example of a sub-assembly of FIG. 9;
[0027] [Fig. 13] est une vue schématique selon une perspective différente du troisième exemple d’entretoise ; [0027] [Fig. 13] is a schematic view from a different perspective of the third example of a spacer;
[0028] [Fig. 14] est une vue schématique du dessus du deuxième sous-ensemble de la figure 9, duquel a été retirée la roue de ventilateur. Description des modes de réalisation [0028] [Fig. 14] is a schematic top view of the second sub-assembly of Figure 9, from which the fan wheel has been removed. Description of the embodiments
[0029] La figure 1 illustre de manière schématique un dispositif de ventilation 10 (ou ventilateur) pour une installation de chauffage, ventilation et/ou climatisation de véhicule automobile. Classiquement, une telle installation de chauffage, ventilation et/ou climatisation pour véhicule automobile comporte un circuit d’aération, un dispositif de ventilation 10 pour mettre en mouvement l’air dans le circuit d’aération, et des moyens pour chauffer et/ou des moyens pour rafraîchir le flux d’air mis en mouvement par le dispositif de ventilation 10. Figure 1 schematically illustrates a ventilation device 10 (or fan) for a heating, ventilation and / or air conditioning installation of a motor vehicle. Conventionally, such a heating, ventilation and / or air conditioning installation for a motor vehicle comprises an aeration circuit, a ventilation device 10 for moving the air in the ventilation circuit, and means for heating and / or means for cooling the flow of air set in motion by the ventilation device 10.
[0030] Le dispositif de ventilation 10 comprend essentiellement, tel qu’illustré, une roue de ventilateur 12, un moteur électrique 14, et un support 16 du moteur électrique 14. La roue de ventilateur 12 tourne autour d’un axe de rotation A. Le moteur électrique 14 est destiné à entraîner en rotation autour de son axe A, la roue de ventilateur 12. Le support 16 du moteur 14 est destiné à permettre la fixation du dispositif de ventilation 10 dans un véhicule automobile, en limitant la transmission des vibrations générées par le moteur électrique 14 et/ou la roue de ventilateur 12 dans le véhicule automobile et/ou des contraintes extérieures vers le moteur électrique 14 et/ou la roue de ventilateur 12. The ventilation device 10 essentially comprises, as illustrated, a fan wheel 12, an electric motor 14, and a support 16 for the electric motor 14. The fan wheel 12 rotates about an axis of rotation A The electric motor 14 is intended to drive in rotation around its axis A, the fan wheel 12. The support 16 of the motor 14 is intended to allow the fixing of the ventilation device 10 in a motor vehicle, while limiting the transmission of air. vibrations generated by the electric motor 14 and / or the fan wheel 12 in the motor vehicle and / or external constraints towards the electric motor 14 and / or the fan wheel 12.
[0031] Le support 16 du moteur 14 peut notamment comporter deux bagues coaxiales, rigides, d’axe A, reliées entre elles par un élément de découplage en matériau élastomère, souple. L’élément de découplage entre la bague interne et la bague externe peut également prendre la forme d’une bague. La bague interne peut être destinée à être fixée au moteur 14. La bague externe peut être destinée à être fixée à un élément de structure, d’une installation de ventilation de véhicule. Le matériau élastomère est par exemple du polystyrène-b-poly(éthylène-butylène)-b- polystyrène ou SEBS. [0031] The support 16 of the motor 14 may in particular comprise two coaxial, rigid rings of axis A, interconnected by a decoupling element made of flexible elastomeric material. The decoupling element between the inner ring and the outer ring can also take the form of a ring. The inner ring may be intended to be fixed to the engine 14. The outer ring may be intended to be fixed to a structural element of a vehicle ventilation installation. The elastomeric material is, for example, polystyrene-b-poly (ethylene-butylene) -b-polystyrene or SEBS.
[0032] Le moteur électrique 14 forme ici un ensemble mécanique comprenant un élément tournant 18, en l’espèce le rotor 18 du moteur 14, un support 20 du rotor 18 et un capot 22, fixé sur le support 20 du rotor 18. Ici, le capot 22 est fixé sur le support 20 du rotor 18 au moyen de vis 24. Bien entendu d’autres moyens de fixation peuvent être mis en oeuvre pour fixer le capot 22 sur le support 20 du rotor 18. The electric motor 14 here forms a mechanical assembly comprising a rotating element 18, in this case the rotor 18 of the motor 14, a support 20 of the rotor 18 and a cover 22, fixed on the support 20 of the rotor 18. Here , the cover 22 is fixed on the support 20 of the rotor 18 by means of screws 24. Of course other fixing means can be implemented to fix the cover 22 on the support 20 of the rotor 18.
[0033] Le rotor 18 est ici un rotor externe. Ainsi, le stator 26 associé au rotor 18 est disposé radialement à l’intérieur du rotor 18. Plus précisément, les aimants 27 du rotor 18 sont radialement à l’extérieur par rapport aux bobinages du stator 26. The rotor 18 is here an external rotor. Thus, the stator 26 associated with the rotor 18 is disposed radially inside the rotor 18. More precisely, the magnets 27 of the rotor 18 are radially outward with respect to the coils of the stator 26.
[0034] Comme visible sur les figures 2 et 3, le rotor 18 comporte une coupelle 28. La coupelle 28 est symétrique par rotation autour de l’axe A correspondant à l’axe de rotation du moteur électrique 14. En l’espèce, la coupelle 28 comporte une première portion cylindrique 68, radialement interne. La première portion cylindrique 68 est emmanchée sur un arbre 30 du rotor 18 pour entraîner l’arbre 30 en rotation. Par ailleurs, la coupelle 28 comporte une deuxième portion cylindrique 32, radialement externe. Les aimants 27 du rotor 18 sont ici fixés sur la face interne de la deuxième portion cylindrique 32. As visible in Figures 2 and 3, the rotor 18 comprises a cup 28. The cup 28 is symmetrical by rotation about the axis A corresponding to the axis of rotation of the electric motor 14. In this case, the cup 28 comprises a first cylindrical portion 68, radially internal. The first cylindrical portion 68 is fitted onto a shaft 30 of the rotor 18 to drive the shaft 30 in rotation. Furthermore, the cup 28 comprises a second cylindrical portion 32, radially outer. The magnets 27 of the rotor 18 are here fixed to the internal face of the second cylindrical portion 32.
[0035] La coupelle 28 comporte encore une portion annulaire 70 qui s’étend radialement depuis la première portion cylindrique 68 vers la deuxième portion cylindrique 32. La portion annulaire 70 s’étend ici globalement selon un plan normal à l’axe A de rotation du moteur 14. [0036] La coupelle 28 comporte encore une portion tronconique 75, radialement externe par rapport à la portion annulaire 70. La portion tronconique 75 s’étend depuis l’extrémité de la portion annulaire 70. La portion tronconique 75 relie ici la portion annulaire 70 à la deuxième portion cylindrique 32. La portion tronconique 75 contribue notamment à rigidifier la coupelle 28. The cup 28 further comprises an annular portion 70 which extends radially from the first cylindrical portion 68 towards the second cylindrical portion 32. The annular portion 70 here extends generally in a plane normal to the axis A of rotation engine 14. The cup 28 also comprises a frustoconical portion 75, radially outer relative to the annular portion 70. The frustoconical portion 75 extends from the end of the annular portion 70. The frustoconical portion 75 here connects the annular portion 70 to the second cylindrical portion 32. The frustoconical portion 75 contributes in particular to stiffening the cup 28.
[0037] Telle qu’illustrée à la figure 3 notamment, la coupelle 28 comporte des ouvertures 72. Les ouvertures 72 permettent de réduire encore le poids de la coupelle 28 et, également, de faciliter le refroidissement des bobinages du stator 26 reçus à l’intérieur de la coupelle 28. Les ouvertures 72 sont séparées par des bras 74. Ici, les bras 74 s’étendent radialement, de telle sorte que les bras 74 définissent des ouvertures 72 sensiblement trapézoïdales. Les ouvertures 72 peuvent être définies dans la portion annulaire 70 et/ou la portion tronconique 75 de la coupelle 28. Ici, la coupelle 28 comprend sept bras 74, séparant sept ouvertures 72. De manière plus générale, pour limiter les risques d’apparition de modes propres de la coupelle 28 à des fréquences relativement faibles, la coupelle 28 comprend de préférence un nombre premier de bras 74. Ce nombre de bras 74 est de préférence supérieur ou égal à sept. As illustrated in Figure 3 in particular, the cup 28 has openings 72. The openings 72 further reduce the weight of the cup 28 and, also, to facilitate the cooling of the stator windings 26 received at the The interior of the cup 28. The openings 72 are separated by arms 74. Here, the arms 74 extend radially, so that the arms 74 define substantially trapezoidal openings 72. The openings 72 can be defined in the annular portion 70 and / or the frustoconical portion 75 of the cup 28. Here, the cup 28 comprises seven arms 74, separating seven openings 72. More generally, to limit the risks of occurrence. of natural modes of the cup 28 at relatively low frequencies, the cup 28 preferably comprises a prime number of arms 74. This number of arms 74 is preferably greater than or equal to seven.
[0038] La coupelle 28 comporte encore des rainures radiales 38, sur sa surface externe. Les rainures radiales 38 peuvent s’étendre sur la portion annulaire 70 et/ou la portion tronconique 75. Les rainures radiales 38 s’étendent notamment chacune sur un bras 74 respectif de la coupelle 28. Chaque rainure radiale 38 s’étend par exemple selon une droite médiane du bras 74 associé. The cup 28 also has radial grooves 38 on its outer surface. The radial grooves 38 may extend over the annular portion 70 and / or the frustoconical portion 75. The radial grooves 38 in particular each extend over a respective arm 74 of the cup 28. Each radial groove 38 extends for example along a median line of the associated arm 74.
[0039] La coupelle 28 comporte encore une rainure circulaire 40, d’axe l’axe A de la coupelle 28. La rainure circulaire 40 relie ici les rainures radiales 38 ensemble. La rainure circulaire 40 s’étend sur la portion annulaire 70 de la coupelle 28. [0039] The cup 28 also has a circular groove 40, centered on the axis A of the cup 28. The circular groove 40 here connects the radial grooves 38 together. The circular groove 40 extends over the annular portion 70 of the cup 28.
[0040] La coupelle 28 peut notamment avoir une épaisseur E28 inférieure ou égale 2,5 mm, de préférence inférieure ou égale à 2 mm. The cup 28 may in particular have a thickness E28 less than or equal to 2.5 mm, preferably less than or equal to 2 mm.
[0041] La coupelle 28 peut encore présenter un rayon externe R28, correspondant au rayon de la deuxième portion cylindrique 32, supérieur ou égal à 46 mm et/ou inférieur ou égal à 50 mm, de préférence inférieur ou égal à 48 mm. [0042] La coupelle 28 est par exemple réalisée en métal. The cup 28 may also have an outer radius R28, corresponding to the radius of the second cylindrical portion 32, greater than or equal to 46 mm and / or less than or equal to 50 mm, preferably less than or equal to 48 mm. The cup 28 is for example made of metal.
[0043] Par ailleurs, comme illustré aux figures 2 et 3 notamment, le support 20 du rotor 18 présente ici une embase 34. L’embase 34 s’étend ici globalement selon un plan normal à l’axe A de rotation du moteur 14. Un relief 36 sensiblement cylindrique s’étend depuis l’embase 34. Ici, le relief 36 s’étend sensiblement selon la direction de l’axe A de rotation du moteur 14. Le relief 36 est creux. Le relief 36 peut notamment former un ou deux logements recevant chacun une bague de roulement, notamment un roulement à billes, destinée à guider la rotation de l’arbre 30 par rapport au support 20. Furthermore, as illustrated in Figures 2 and 3 in particular, the support 20 of the rotor 18 here has a base 34. The base 34 here extends generally in a plane normal to the axis A of rotation of the motor 14 A substantially cylindrical relief 36 extends from the base 34. Here, the relief 36 extends substantially in the direction of the axis A of rotation of the motor 14. The relief 36 is hollow. The relief 36 may in particular form one or two housings each receiving a rolling ring, in particular a ball bearing, intended to guide the rotation of the shaft 30 relative to the support 20.
[0044] Comme visible sur la figure 4, une entretoise 42 est ici disposée entre la coupelle 28 et l’arbre 30 du moteur. Plus précisément, l’entretoise 42 est fixée à l’arbre 30, d’une part, et est contact avec la coupelle 28 d’autre part. L’entretoise 42 permet ainsi de rigidifier la coupelle 28, et d’en limiter les vibrations. As visible in Figure 4, a spacer 42 is here disposed between the cup 28 and the shaft 30 of the motor. Specifically, the spacer 42 is attached to the shaft 30 on the one hand and makes contact with the cup 28 on the other hand. The spacer 42 thus makes it possible to stiffen the cup 28, and to limit its vibrations.
[0045] L’entretoise 42 présente ici une symétrie par rotation. La zone de contact de l’entretoise 42 avec la coupelle 28 est ainsi, dans l’exemple de la figure 4, également symétrique par rotation. L’entretoise permet ainsi de limiter, voire d’empêcher, les mouvements de basculement de la coupelle 28 autour d’axes perpendiculaires à l’axe A de rotation de l’arbre 28. The spacer 42 here has rotational symmetry. The contact area of the spacer 42 with the cup 28 is thus, in the example of Figure 4, also rotationally symmetrical. The spacer thus makes it possible to limit, or even prevent, the tilting movements of the cup 28 about axes perpendicular to the axis A of rotation of the shaft 28.
[0046] Ici, pour en améliorer encore l’efficacité, l’entretoise 42 est conformée pour que la zone de contact de l’entretoise 42 sur la coupelle 28 soit sensiblement plane. Here, to further improve its efficiency, the spacer 42 is shaped so that the contact area of the spacer 42 on the cup 28 is substantially flat.
[0047] Selon l’exemple de la figure 4, l’entretoise 42 est disposée à l’intérieur de la coupelle 28. [0047] According to the example of Figure 4, the spacer 42 is disposed inside the cup 28.
[0048] Dans l’exemple illustré sur les figures 4 à 7, l’entretoise 42 consiste en une rondelle 43. In the example illustrated in Figures 4 to 7, the spacer 42 consists of a washer 43.
[0049] En l’espèce, la rondelle 43 comporte tout d’abord une couronne 44 et des doigts 46, la couronne 44 étant radialement interne par rapport aux doigts 46. La couronne radialement interne 44 relie ainsi les extrémités radialement internes 48 des doigts 46. In this case, the washer 43 firstly comprises a crown 44 and fingers 46, the crown 44 being radially internal with respect to the fingers 46. The radially internal crown 44 thus connects the radially internal ends 48 of the fingers 46.
[0050] La couronne radialement interne 44 et les doigts 46 de la rondelle 43 s’étendent ici globalement selon un plan normal à l’axe A de rotation du rotor 18. La couronne radialement interne 44 et les doigts 46 de la rondelle 43 sont en contact plan avec la portion annulaire 70 de la coupelle 28. The radially internal ring 44 and the fingers 46 of the washer 43 extend here generally in a plane normal to the axis A of rotation of the rotor 18. The radially internal crown 44 and the fingers 46 of the washer 43 are in plane contact with the annular portion 70 of the cup 28.
[0051] Ici, la rondelle 43 comporte sept doigts 48. Les doigts 48 sont alignés avec les bras 74 de la coupelle 28. Les doigts 48 de la rondelle 43 peuvent notamment permettre de renforcer les bras 74 de la coupelle 28. Pour ce faire, chaque doigt 48 de la rondelle 43 peut s’étendre sur une moins une portion de la longueur d’un bras 74 de la coupelle 28, associé. Here, the washer 43 has seven fingers 48. The fingers 48 are aligned with the arms 74 of the cup 28. The fingers 48 of the washer 43 can in particular make it possible to strengthen the arms 74 of the cup 28. To do this , each finger 48 of the washer 43 can extend over at least a portion of the length of an arm 74 of the cup 28, associated.
[0052] La couronne radialement interne 44 et les doigts 46 définissent une surface de contact 92 de la rondelle 43 avec la portion annulaire 70 de la coupelle 28. La surface de contact 92 est symétrique par rotation. Ici, la surface de contact 92 présente la forme d’une roue dentée. The radially internal crown 44 and the fingers 46 define a contact surface 92 of the washer 43 with the annular portion 70 of the cup 28. The contact surface 92 is rotationally symmetrical. Here, the contact surface 92 is in the form of a toothed wheel.
[0053] Comme illustré à la figure 5, vue dans un demi-plan de coupe longitudinal, coupant un doigt 46 de la rondelle 43, la surface de contact 92 peut présenter :As illustrated in Figure 5, seen in a longitudinal half-plane of section, cutting a finger 46 of the washer 43, the contact surface 92 may have:
- une largeur L92, rapportée au rayon externe R28 de la coupelle 28, L92/R28, supérieure ou égale à 0,05 et/ou inférieure ou égale à 0,1 ; et/ou a width L92, related to the external radius R28 of the cup 28, L92 / R28, greater than or equal to 0.05 and / or less than or equal to 0.1; and or
- une extrémité P1 radialement interne, distante de l’axe A de rotation de l’arbre 30 d’une distance D1 , rapportée au rayon externe R28 de la coupelle 28, D1/R28, supérieure ou égale à 0,16 et/ou inférieure ou égale à 0,21 ; et/ou a radially internal end P1, distant from the axis A of rotation of the shaft 30 by a distance D1, referred to the external radius R28 of the cup 28, D1 / R28, greater than or equal to 0.16 and / or less than or equal to 0.21; and or
- une extrémité radialement externe P2, distante de l’axe A de rotation de l’arbre 30 d’une distance D2, rapportée au rayon externe R28 de la coupelle 28, D2/R28, supérieure ou égale à 0,22 et/ou inférieure ou égale à 0,32. a radially outer end P2, distant from the axis A of rotation of the shaft 30 by a distance D2, referred to the outer radius R28 of the cup 28, D2 / R28, greater than or equal to 0.22 and / or less than or equal to 0.32.
[0054] Par ailleurs, la rondelle 43 comporte une portion cylindrique 50, radialement interne. La portion cylindrique 50 s’étend selon la direction de l’axe A de rotation de l’arbre 30. La portion cylindrique 50 est fixée sur l’arbre 30. Par exemple, la portion cylindrique 50 est emmanchée en force sur l’arbre 30. La portion cylindrique 50 définit alors une surface de contact 94 de la rondelle 43 avec l’arbre 30, telle que vue dans un demi-plan de coupe, longitudinal : Furthermore, the washer 43 comprises a cylindrical portion 50, radially internal. The cylindrical portion 50 extends in the direction of the axis A of rotation of the shaft 30. The cylindrical portion 50 is fixed to the shaft 30. For example, the cylindrical portion 50 is force-fitted on the shaft. 30. The cylindrical portion 50 then defines a contact surface 94 of the washer 43 with the shaft 30, as seen in a longitudinal half-section plane:
- la surface de contact 94, s’étend selon la direction de l’axe A, entre une première extrémité axiale P3, au voisinage de la coupelle 28, et une deuxième extrémité axiale P4, distante de la coupelle 28, tels que la hauteur D4 entre les première et deuxième extrémités axiales P3, P4, rapportée au rayon externe R28 de la coupelle 28, D4/R28, est comprise entre 0,04 et 0,08; et/ou - the contact surface 94, extends in the direction of the axis A, between a first axial end P3, in the vicinity of the cup 28, and a second axial end P4, remote from the cup 28, such as the height D4 between the first and second axial ends P3, P4, referred to the external radius R28 of the cup 28, D4 / R28, is between 0.04 and 0.08; and or
- la surface de contact 94 de la rondelle 43 avec l’arbre 30 est distante de la surface de contact 92 de la rondelle 43, avec la coupelle 28, selon la direction de l’axe A, de préférence d’une distance D3, rapportée au rayon R28 de la coupelle 28, D3/R28, comprise entre 0,06 et 0,08 ; et/ou - the contact surface 94 of the washer 43 with the shaft 30 is distant from the contact surface 92 of the washer 43, with the cup 28, in the direction of the axis A, preferably by a distance D3, referred to the radius R28 of the cup 28, D3 / R28, between 0.06 and 0.08; and or
- la droite reliant l’extrémité P1 radialement interne de la surface de contact 92 de la rondelle 43 sur la coupelle 28 à l’extrémité P3 de la surface de contact 94 de la rondelle 43 avec l’arbre 30, au voisinage de la coupelle 28, forme avec l’axe A de l’arbre 30, un angle a compris entre 30° et 60°. - the straight line connecting the radially internal end P1 of the contact surface 92 of the washer 43 on the cup 28 to the end P3 of the contact surface 94 of the washer 43 with the shaft 30, in the vicinity of the cup 28, forms with the axis A of the shaft 30, an angle a of between 30 ° and 60 °.
[0055] La rondelle 43 présente encore, selon l’exemple illustré sur les figures 4 à 6, une portion bombée 52 et une portion annulaire 53 telles que la rondelle 43 consiste, dans l’exemple illustré, depuis le centre de la rondelle 43, en une portion cylindrique 50, une portion annulaire 53, une portion bombée 52, la couronne annulaire 44 et les doigts 46. Les portions bombée 52 et annulaire 53 contribuent à rigidifier la rondelle 43. The washer 43 also has, according to the example illustrated in Figures 4 to 6, a domed portion 52 and an annular portion 53 such that the washer 43 consists, in the example illustrated, from the center of the washer 43 , in a cylindrical portion 50, an annular portion 53, a convex portion 52, the annular ring 44 and the fingers 46. The convex 52 and annular portions 53 help to stiffen the washer 43.
[0056] La rondelle 43 présente ici une hauteur H43, mesurée selon la direction de l’axe A de l’arbre 30, supérieure ou égale à 8 mm, de préférence supérieure ou égale à 9 mm. La rondelle 43 est notamment en métal. La rondelle 43 peut notamment être une pièce estampée. La rondelle 43 telle que décrite peut notamment avoir une épaisseur E43 supérieure ou égale à 1 mm, de préférence supérieure ou égale à 1 ,5 mm et/ou inférieure ou égale à 3 mm. The washer 43 here has a height H43, measured in the direction of the axis A of the shaft 30, greater than or equal to 8 mm, preferably greater than or equal to 9 mm. The washer 43 is in particular made of metal. The washer 43 can in particular be a stamped part. The washer 43 as described may in particular have a thickness E43 greater than or equal to 1 mm, preferably greater than or equal to 1, 5 mm and / or less than or equal to 3 mm.
[0057] Les figures 8 et 9 illustre un deuxième exemple d’entretoise 42. Dans l’exemple illustré sur ces figures 8 et 9, l’entretoise 42 comporte une rondelle 43 et des éléments d’amortissement 54, destinés à être interposés entre la coupelle 28 et la rondelle 43. Les éléments d’amortissement 54 limitent la transmission des vibrations de la coupelle 28 vers la rondelle 43 lors du fonctionnement du moteur 14. En outre, les éléments d’amortissement 54 limitent la transmission des vibrations de la rondelle 43 vers la coupelle 28 lors du fonctionnement du moteur 14. Figures 8 and 9 illustrate a second example of a spacer 42. In the example illustrated in these Figures 8 and 9, the spacer 42 comprises a washer 43 and damping elements 54, intended to be interposed between the cup 28 and the washer 43. The damping elements 54 limit the transmission of vibrations from the cup 28 to the washer 43 during operation of the engine 14. In addition, the damping elements 54 limit the transmission of vibrations from the motor 14. washer 43 towards the cup 28 during the operation of the engine 14.
[0058] Chaque élément d’amortissement 54 est contraint entre la portion annulaire 70 de la coupelle 28 et la rondelle 43, notamment la couronne radialement interne 44 de la rondelle 43. Chaque élément d’amortissement 54 a ainsi une épaisseur E1 , avant d’être contraint entre la coupelle 28 et la rondelle 43, comprise entre 2 mm et 4 mm. Chaque élément d’amortissement 54 a par ailleurs une épaisseur E2, une fois contraint entre la coupelle 28 et la rondelle 43, comprise entre 1 ,5 mm et 3 mm. Chaque élément d’amortissement 54 peut ainsi avoir un taux de compression C compris entre 20% et 30%. Par taux de compression C, on entend ici le rapport entre : Each damping element 54 is constrained between the annular portion 70 of the cup 28 and the washer 43, in particular the radially internal crown 44 of the washer 43. Each damping element 54 thus has a thickness E1, before being constrained between the cup 28 and the washer 43, between 2 mm and 4 mm. Each damping element 54 also has a thickness E2, once constrained between the cup 28 and the washer 43, between 1.5 mm and 3 mm. Each damping element 54 can thus have a compression ratio C of between 20% and 30%. By compression ratio C is meant here the ratio between:
- la différence entre l’épaisseur E1 de l’élément d’amortissement 54 avant d’être contraint et l’épaisseur E2 de l’élément d’amortissement 54 contraint entre la coupelle 28 et la rondelle 43, d’une part ; et - the difference between the thickness E1 of the damping element 54 before being forced and the thickness E2 of the damping element 54 forced between the cup 28 and the washer 43, on the one hand; and
- l’épaisseur E1 de l’élément d’amortissement 54 avant d’être contraint, d’autre part. Le taux de compression C est ainsi donné par la formule : - the thickness E1 of the damping element 54 before being forced, on the other hand. The compression ratio C is thus given by the formula:
[MATH. 1]
Figure imgf000015_0001
[MATH. 1]
Figure imgf000015_0001
[0059] Comme visible sur les figures 8 et 9, chaque élément d’amortissement 54 peut consister en un pion 54. Les pions 54 sont ici régulièrement répartis autour de l’axe A de rotation du rotor 18. Par exemple, un pion 54 est disposé sur chacun des doigts 46 de la rondelle 43. Ceci permet de disposer les pions 54 le plus loin possible de l’axe A de rotation du rotor 18. Il semble en effet que l’effet des pions 54, et plus généralement du ou des éléments d’amortissement 54, est d’autant plus notable que celui-ci est distant de l’axe A de rotation du rotor 18. As visible in Figures 8 and 9, each damping element 54 may consist of a pin 54. The pins 54 are here regularly distributed around the axis A of rotation of the rotor 18. For example, a pin 54 is arranged on each of the fingers 46 of the washer 43. This allows the pins 54 to be placed as far as possible from the axis A of rotation of the rotor 18. It seems in fact that the effect of the pins 54, and more generally of the or damping elements 54, is all the more noticeable the more the latter is distant from the axis A of rotation of the rotor 18.
[0060] Chaque pion 54 comporte ici une tête 58 cylindrique. Le diamètre D58 de la tête cylindrique 58 de chaque pion 54 est par exemple compris entre 3 mm et 5 mm, de préférence supérieur à 3,5 mm. La tête cylindrique 58 est destinée à être en contact avec la portion annulaire 70 de la coupelle 28. Each pin 54 here comprises a cylindrical head 58. The diameter D58 of the cylindrical head 58 of each pin 54 is for example between 3 mm and 5 mm, preferably greater than 3.5 mm. The cylindrical head 58 is intended to be in contact with the annular portion 70 of the cup 28.
[0061] Chaque pion 54 comporte également une tige 60. Chaque tige 60 s’étend selon la direction de l’axe A de rotation du rotor 18. Chaque tige 60 a un diamètre D60, inférieur au diamètre D58 de la tête cylindrique 58 associée. Chaque tige 60 est reçue dans un trou 62 de la rondelle 43, de préférence contrainte. Les pions 54 peuvent ainsi être assemblés sur la rondelle 43 sans nécessiter de moyen de fixation rapporté, notamment sans colle. Each pin 54 also comprises a rod 60. Each rod 60 extends in the direction of the axis A of rotation of the rotor 18. Each rod 60 has a diameter D60, less than the diameter D58 of the cylindrical head 58 associated . Each rod 60 is received in a hole 62 of the washer 43, preferably constrained. The pawns 54 can thus be assembled on the washer 43 without requiring any attached fixing means, in particular without glue.
[0062] Les pions 54 sont ici reliés par un anneau 64, d’axe l’axe A de rotation du rotor 18. L’anneau 64 permet notamment de faciliter la manipulation des pions 54. The pins 54 are here connected by a ring 64, with an axis of the axis A of rotation of the rotor 18. The ring 64 makes it possible in particular to facilitate the handling of the pins 54.
[0063] Le ou les éléments d’amortissement 54 sont par exemple en matériau élastomère, de préférence en matériau élastomère thermoplastique, notamment en SEBS ou EPDM, plus particulièrement en Santoprene™, ou en silicone. Le ou les éléments d’amortissements peuvent avoir une dureté inférieure à 40 Shore. The damping element (s) 54 are for example made of elastomeric material, preferably of thermoplastic elastomer material, in particular of SEBS or EPDM, more particularly of Santoprene ™, or of silicone. The damping element (s) may have a hardness of less than 40 Shore.
[0064] Les figures 10 à 13 illustrent un troisième exemple d’entretoise 42. Ici, l’entretoise 42 est disposée à l’extérieur de la coupelle 28. L’entretoise 42 est ainsi interposée entre le ventilateur 12 et la coupelle 28. Figures 10 to 13 illustrate a third example of a spacer 42. Here, the spacer 42 is disposed outside the cup 28. The spacer 42 is thus interposed between the fan 12 and the cup 28.
[0065] Les figures 10 à 13 illustrent un mode de réalisation de l’entretoise 42, particulièrement adaptée au cas où l’entretoise 42 comporte une rondelle 43 en matériau plastique. La rondelle 43 peut en particulier être en polypropylène (ou PP) ou en poly(téréphtalate de butylène) (ou PBT). Le matériau plastique, notamment le PP ou le PBT, peut être chargé en fibres de verre. Figures 10 to 13 illustrate an embodiment of the spacer 42, particularly suited to the case where the spacer 42 comprises a washer 43 of plastic material. The washer 43 can in particular be made of polypropylene (or PP) or of poly (butylene terephthalate) (or PBT). The plastic material, in particular PP or PBT, can be loaded with glass fibers.
[0066] Comme dans les exemples décrits ci-avant, la rondelle 43 comporte une couronne radialement interne 44, des doigts 46 et une portion cylindrique 50, radialement interne. As in the examples described above, the washer 43 comprises a radially internal crown 44, fingers 46 and a cylindrical portion 50, radially internal.
[0067] Ici, la portion cylindrique 50 comporte des créneaux 80, orientés radialement vers l’intérieur. Les créneaux 80 facilitent l’emmanchement de la portion cylindrique 50 sur l’arbre 30, notamment lorsque la rondelle 43 est en matériau plastique. Here, the cylindrical portion 50 has slots 80, oriented radially inward. The slots 80 facilitate the fitting of the cylindrical portion 50 on the shaft 30, especially when the washer 43 is made of plastic material.
[0068] La rondelle 43 comporte encore une portion tronconique 56, entre la portion cylindrique 50 et les doigts 46. La portion tronconique 56 s’étend sur une surface de la couronne radialement interne 44 distante de la coupelle 28, sensiblement sur toute la surface de la couronne radialement interne 44. La portion tronconique 56 comprend ici une succession de secteurs saillant 69, chacun aligné avec un doigt 46, et de secteurs en creux. La portion tronconique 56 présente ainsi des « vagues ». Les secteurs saillant 69 permettent notamment de renforcer les doigts 46 de la rondelle 43. Les secteurs en creux permettent de limiter l’encombrement et le poids de la rondelle 43. The washer 43 also comprises a frustoconical portion 56, between the cylindrical portion 50 and the fingers 46. The frustoconical portion 56 extends over a surface of the radially internal crown 44 remote from the cup 28, substantially over the entire surface of the radially internal crown 44. The frustoconical portion 56 here comprises a succession of projecting sectors 69, each aligned with a finger 46, and of recessed sectors. The frustoconical portion 56 thus presents “waves”. The protruding sectors 69 make it possible in particular to strengthen the fingers 46 of the washer 43. The recessed sectors make it possible to limit the size and weight of the washer 43.
[0069] La rondelle 43 comporte encore une couronne radialement externe 64. La couronne radialement externe 64 relie les extrémités radialement externes 82 des doigts 46. La couronne radialement externe 64 de la rondelle 43 s’étend ici globalement selon un plan normal à l’axe A de rotation du rotor 18. La couronne radialement externe 64 peut avoir une hauteur H64, mesurée selon la direction de l’axe A de rotation du rotor 18, peut être supérieure ou égale à 2 mm, de préférence supérieure ou égale à 3 mm. La couronne radialement externe 64 contribue ainsi à l’équilibrage de la rondelle 43 et de la coupelle 28, lors du fonctionnement du moteur 14. The washer 43 also comprises a radially outer ring 64. The radially outer ring 64 connects the radially outer ends 82 of the fingers 46. The radially outer ring 64 of the washer 43 extends here generally in a plane normal to the axis A of rotation of the rotor 18. The radially outer ring 64 may have a height H64, measured in the direction of the axis A of rotation of the rotor 18, may be greater than or equal to 2 mm, preferably greater than or equal to 3 mm. The radially outer ring 64 thus contributes to the balancing of the washer 43 and the cup 28, during operation of the engine 14.
[0070] La rondelle 43 présente encore un évidement cylindrique 78, s’étendant selon la direction de l’axe A de rotation du moteur 14. Ici, l’évidement cylindrique 78 permet de recevoir la première portion cylindrique 68 de la coupelle 28. L’évidement cylindrique 78 permet ainsi un montage compact de l’entretoise 42. The washer 43 also has a cylindrical recess 78, extending in the direction of the axis A of rotation of the motor 14. Here, the cylindrical recess 78 makes it possible to receive the first cylindrical portion 68 of the cup 28. The cylindrical recess 78 thus allows compact mounting of the spacer 42.
[0071] L’entretoise 42 comporte par ailleurs un élément d’amortissement 54, ici unique, interposé entre la rondelle 43 et la coupelle 28. L’élément d’amortissement 54 peut notamment être surmoulé sur la rondelle 43. L’élément d’amortissement 54 est également contraint entre la rondelle 43 et la coupelle 28. Le taux de compression de l’élément d’amortissement 54, interposé entre la rondelle 43 et la coupelle 28, peut être le même que celui indiqué ci-avant. L’élément d’amortissement 54 peut également être en un même matériau que celui décrit ci- avant. The spacer 42 also comprises a damping element 54, here unique, interposed between the washer 43 and the cup 28. The damping element 54 can in particular be molded onto the washer 43. The element d The damping 54 is also constrained between the washer 43 and the cup 28. The compression ratio of the damping element 54, interposed between the washer 43 and the cup 28, may be the same as that indicated above. The damping element 54 can also be made of the same material as that described above.
[0072] Comme plus visible sur la figure 12, l’élément d’amortissement 54 comporte ici des doigts 86 et une couronne 84, radialement interne par rapport aux doigts 86. Les doigts 86 s’étendent sensiblement jusqu’au niveau de la couronne radialement externe 64 de la rondelle 43. Les doigts 86 de l’élément d’amortissement 54 sont alignés avec les doigts 46 de la rondelle 43. Les doigts 86 de l’élément d’amortissement 54 sont par ailleurs en contact plan avec les doigts 46 et la couronne radialement externe 64 de la rondelle 43. [0073] L’élément d’amortissement 54 comporte en outre des nervures radiales 88 et une nervure circulaire 90, reliant ici les nervures radiales 88. Les nervures radiales 88 et la nervure circulaire 90 de l’élément d’amortissement 54 sont complémentaires de reliefs sur la surface extérieure de la coupelle 28. [0074] L’invention ne se limite pas aux seuls exemples présentés ci-dessus mais est au contraire susceptibles de nombreuses variantes accessibles à l’homme de l’art. As more visible in Figure 12, the damping element 54 here comprises fingers 86 and a crown 84, radially internal relative to the fingers 86. The fingers 86 extend substantially to the level of the crown. radially outer 64 of the washer 43. The fingers 86 of the damping element 54 are aligned with the fingers 46 of the washer 43. The fingers 86 of the damping element 54 are furthermore in plane contact with the fingers 46 and the radially outer crown 64 of the washer 43. The damping element 54 further comprises radial ribs 88 and a circular rib 90, here connecting the radial ribs 88. The radial ribs 88 and the circular rib 90 of the damping element 54 are complementary to reliefs on the outer surface of the cup 28. The invention is not limited to the examples presented above but is, on the contrary, susceptible to numerous variants accessible to those skilled in the art.
[0075] Par exemple, le dispositif 10 peut comporter deux entretoises 42, de part et d’autre de la coupelle 28. Alors, la rigidité de la coupelle 28 peut être encore augmentée pour limiter les vibrations de la coupelle lors du fonctionnement du moteur 14. For example, the device 10 may include two spacers 42, on either side of the cup 28. Then, the rigidity of the cup 28 can be further increased to limit the vibrations of the cup during operation of the engine. 14.
[0076] Le ou les élément(s) d’amortissement 54 peu/ven/t être surmoulé(s) sur la rondelle. Dans ces cas, le ou les éléments d’amortissements est/sont plus faciles à manipuler et le montage du dispositif de ventilation s’en trouve facilité. The damping element (s) 54 can be overmolded on the washer. In these cases, the cushioning element (s) is / are easier to handle and the mounting of the ventilation device is facilitated.

Claims

Revendications Claims
[Revendication 1] Rotor de moteur (18), notamment pour groupe moto-ventilateur d’installation de chauffage, ventilation et/ou climatisation de véhicule automobile, comprenant : [Claim 1] Motor rotor (18), in particular for a motor-driven fan unit for a motor vehicle heating, ventilation and / or air conditioning installation, comprising:
- un arbre (30) s’étendant principalement selon une direction axiale (A), - a shaft (30) extending mainly in an axial direction (A),
- une coupelle (28), solidaire de l’arbre (30) ; et - a cup (28), integral with the shaft (30); and
- au moins une entretoise (42), fixée à l’arbre (30), l’entretoise (42) étant en contact, de préférence plan, avec la coupelle (28). - at least one spacer (42), fixed to the shaft (30), the spacer (42) being in contact, preferably plane, with the cup (28).
[Revendication 2] Rotor selon la revendication précédente, dans lequel la surface de contact (92) de l’entretoise (42) avec la coupelle (28) est distante, selon la direction axiale (A) de l’arbre (30), de la surface de contact (94) de l’entretoise (42) avec l’arbre (30). [Claim 2] A rotor according to the preceding claim, in which the contact surface (92) of the spacer (42) with the cup (28) is distant, in the axial direction (A) of the shaft (30), of the contact surface (94) of the spacer (42) with the shaft (30).
[Revendication 3] Rotor selon la revendication 1 ou 2, dans lequel l’entretoise (42) comporte, de préférence consiste en, une rondelle (43). [Claim 3] A rotor according to claim 1 or 2, wherein the spacer (42) preferably comprises a washer (43).
[Revendication 4] Rotor selon la revendication 3, dans lequel la coupelle (28) comprend une portion annulaire (70), normale à l’axe (A) de rotation de l’arbre (30), et/ou une portion tronconique (75), la portion tronconique (75) et/ou la portion annulaire (70), le cas échéant, présentant des ouvertures (72) séparées par des bras (74), la coupelle (28) comprenant de préférence sept bras (74), la rondelle (43) comprenant des doigts (46) s’étendant radialement, de préférence sept doigts (46), les doigts (46) étant de préférence alignés avec les bras (74) de la coupelle (28), les doigts (46) s’étendant de préférence dans un plan normal à l’axe (A) de l’arbre (30). [Claim 4] A rotor according to claim 3, wherein the cup (28) comprises an annular portion (70), normal to the axis (A) of rotation of the shaft (30), and / or a frustoconical portion ( 75), the frustoconical portion (75) and / or the annular portion (70), where appropriate, having openings (72) separated by arms (74), the cup (28) preferably comprising seven arms (74) , the washer (43) comprising radially extending fingers (46), preferably seven fingers (46), the fingers (46) preferably being aligned with the arms (74) of the cup (28), the fingers ( 46) preferably extending in a plane normal to the axis (A) of the shaft (30).
[Revendication 5] Rotor selon la revendication 4, dans lequel la rondelle (43) forme une couronne radialement interne, la couronne radialement interne reliant ensemble les extrémités radialement interne des doigts (46), la couronne radialement interne s’étendant de préférence selon un plan normal à la direction axiale (A) de l’arbre (30), et/ou la rondelle (43) comporte une couronne radialement externe (64) reliant les extrémités radialement externes (82) des doigts (46), la couronne radialement externe (64) s’étendant de préférence selon un plan normal à la direction axiale (A) de l’arbre (30). [Claim 5] A rotor according to claim 4, wherein the washer (43) forms a radially inner ring, the radially inner ring connecting together the radially inner ends of the fingers (46), the radially inner ring preferably extending along a line. plane normal to the axial direction (A) of the shaft (30), and / or the washer (43) comprises a radially outer ring (64) connecting the radially outer ends (82) of the fingers (46), the ring radially outer (64) preferably extending in a plane normal to the axial direction (A) of the shaft (30).
[Revendication 6] Rotor selon la revendication 5, comprenant une couronne radialement externe (64) reliant les extrémités radialement externes (82) des doigts (46), la couronne radialement externe (64) s’étendant de préférence selon un plan normal à la direction axiale (A) de l’arbre (30), la couronne radialement externe (64) ayant une hauteur (H64), mesurée selon la direction axiale (A) de l’arbre (30), supérieure ou égale à 4 mm. [Claim 6] A rotor according to claim 5 comprising a radially outer ring (64) connecting the radially outer ends (82) of the fingers (46), the radially outer ring (64) preferably extending in a plane normal to the axial direction (A) of the shaft (30), the radially outer ring (64) having a height (H64), measured in the axial direction (A) of the shaft (30), greater than or equal to 4 mm.
[Revendication 7] Rotor selon l’une quelconque des revendications 3 à 6 dans lequel la rondelle (43) est en métal ou en plastique, notamment en polypropylène ou en polytéréphtalate de butylène, de préférence chargé en fibres de verre. [Claim 7] A rotor according to any one of claims 3 to 6 in which the washer (43) is made of metal or plastic, in particular polypropylene or polybutylene terephthalate, preferably filled with glass fibers.
[Revendication 8] Rotor selon l’une quelconque des revendications précédentes, dans lequel l’entretoise (42) comporte au moins un élément d’amortissement (54), l’entretoise (42) consistant de préférence en une rondelle (43) et au moins un élément d’amortissement (54), fixé sur la rondelle (43), l’élément d’amortissement (54) étant, de préférence encore, contraint contre la coupelle (28). [Claim 8] A rotor according to any preceding claim, wherein the spacer (42) comprises at least one damping member (54), the spacer (42) preferably consisting of a washer (43) and at least one damping element (54), fixed on the washer (43), the damping element (54) being, more preferably, constrained against the cup (28).
[Revendication 9] Rotor selon la revendication 8, dans lequel le au moins un élément d’amortissement (54) est en matériau élastomère, de préférence en matériau élastomère thermoplastique, notamment en SEBS ou EPDM, plus particulièrement en Santoprene™, ou en silicone, le au moins un élément d’amortissement (54) ayant de préférence une dureté inférieure à 40 Shore. [Claim 9] A rotor according to claim 8, in which the at least one damping element (54) is made of elastomeric material, preferably of thermoplastic elastomer material, in particular of SEBS or EPDM, more particularly of Santoprene ™, or of silicone. , the at least one damping element (54) preferably having a hardness of less than 40 Shore.
[Revendication 10] Rotor selon la revendication 8 ou 9, dans lequel le au moins un élément d’amortissement (54) a un taux de compression compris entre 20% et 30%. [Claim 10] A rotor according to claim 8 or 9, wherein the at least one damping element (54) has a compression ratio of between 20% and 30%.
[Revendication 11] Rotor selon l’une des revendications 8 à 10, comprenant une pluralité d’éléments d’amortissement (54) chacun sous forme d’un pion (54), les pions (54) étant de préférence repartis régulièrement autour de l’arbre (30), chaque pion (54) étant de préférence encore reçu serré dans un trou (62) de la rondelle (43), le cas échéant. [Claim 11] A rotor according to one of claims 8 to 10, comprising a plurality of damping elements (54) each in the form of a pin (54), the pins (54) preferably being distributed regularly around the shaft (30), each pin (54) being preferably further received clamped in a hole (62) of the washer (43), if necessary.
[Revendication 12] Moteur électrique pour ventilateur d’installation de ventilation, climatisation et/ou chauffage de véhicule automobile, comprenant un rotor (18) selon l’une quelconque des revendications précédente et un stator (26) disposé radialement à l’intérieur de la coupelle (28) du rotor (18). [Claim 12] Electric motor for a ventilator, air conditioning and / or heating installation fan of a motor vehicle, comprising a rotor (18) according to any one of the preceding claims and a stator (26) disposed radially inside the cup (28) of the rotor (18).
[Revendication 13] Ventilateur pour installation de ventilation, climatisation et/ou chauffage de véhicule automobile, comprenant un moteur selon la revendication précédente, et une roue de ventilateur (12) fixée à l’arbre (30) du rotor (18). [Claim 13] Fan for a motor vehicle ventilation, air conditioning and / or heating installation, comprising a motor according to the preceding claim, and a fan wheel (12) fixed to the shaft (30) of the rotor (18).
PCT/EP2021/064673 2020-06-01 2021-06-01 Motor rotor, in particular for a fan motor of a motor vehicle heating, ventilation and/or air conditioning system WO2021245079A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2005755A FR3111024A1 (en) 2020-06-01 2020-06-01 Motor rotor, in particular for motor vehicle heating, ventilation and / or air conditioning system fan motor
FRFR2005755 2020-06-01

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WO2021245079A1 true WO2021245079A1 (en) 2021-12-09

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0260442A (en) * 1987-09-11 1990-02-28 Matsushita Electric Works Ltd Manufacture of rotor for brushless motor
EP0488961A1 (en) * 1990-10-30 1992-06-03 INDUSTRIE MAGNETI MARELLI S.p.A. A fan, particularly for motor vehicles
DE10017398A1 (en) * 2000-04-07 2001-10-18 Volkswagen Ag Electrical starter-generator unit for coupling to an internal combustion engine includes a stator and a rotor fitted on a drive shaft by means of a bearing and a flexible coupling element.
GB2393586A (en) * 2002-09-27 2004-03-31 Automotive Motion Tech Ltd Device and method for fixing the rotor of an outer-rotor motor to a shaft
US20060076844A1 (en) * 2004-10-08 2006-04-13 Daewoo Electronics Corporation Outer rotor type motor
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor
US8276408B2 (en) * 2002-12-10 2012-10-02 Lg Electronics Inc. Tub having structurally strengthened rear wall and washing machine with the same therein
EP3355451A1 (en) * 2017-01-30 2018-08-01 Shinano Kenshi Kabushiki Kaisha Outer rotor type motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0260442A (en) * 1987-09-11 1990-02-28 Matsushita Electric Works Ltd Manufacture of rotor for brushless motor
EP0488961A1 (en) * 1990-10-30 1992-06-03 INDUSTRIE MAGNETI MARELLI S.p.A. A fan, particularly for motor vehicles
DE10017398A1 (en) * 2000-04-07 2001-10-18 Volkswagen Ag Electrical starter-generator unit for coupling to an internal combustion engine includes a stator and a rotor fitted on a drive shaft by means of a bearing and a flexible coupling element.
GB2393586A (en) * 2002-09-27 2004-03-31 Automotive Motion Tech Ltd Device and method for fixing the rotor of an outer-rotor motor to a shaft
US8276408B2 (en) * 2002-12-10 2012-10-02 Lg Electronics Inc. Tub having structurally strengthened rear wall and washing machine with the same therein
US20060076844A1 (en) * 2004-10-08 2006-04-13 Daewoo Electronics Corporation Outer rotor type motor
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor
EP3355451A1 (en) * 2017-01-30 2018-08-01 Shinano Kenshi Kabushiki Kaisha Outer rotor type motor

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