Classifications

• • 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
  • H02K7/003—Couplings; Details of shafts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K17/00—Arrangement or mounting of transmissions in vehicles
  • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
  • B60K17/24—Arrangements of mountings for shafting
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
  • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
  • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
  • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H57/00—General details of gearing
  • F16H57/02—Gearboxes; Mounting gearing therein
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
  • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
  • H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor
• • 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
  • H02K7/08—Structural association with bearings
  • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
• • 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
  • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
  • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
  • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
  • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections

Definitions

• the present invention relates to a rotary electrical machine provided with a connecting sleeve incorporating a shock absorber.
• the invention finds a particularly advantageous, but not exclusive, application with reversible high power electric machines which can operate in alternator mode and in motor mode coupled with a reducing element.
• rotary electrical machines comprise a stator and a rotor secured to a shaft.
• the stator is mounted in a casing configured to rotate the shaft on bearings by means of bearings.
• the rotor comprises a body formed by a stack of sheets of metal sheets held in the form of a package by means of a suitable fixing system.
• the rotor has poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor.
• the poles are formed by coils wound around the rotor arms.
• the stator comprises a body constituted by a stack of thin sheets forming a crown, the inner face of which is provided with notches open towards the inside to receive a winding.
• the winding is obtained for example from a continuous wire covered with enamel or from conductive elements in the form of pins linked together by welding.
• the winding comprises phase windings connected in a star or a triangle, the outputs of which are connected to an electronic control module.
• a high power reversible rotating electrical machine can be coupled, via a connecting piece, to a reducing element.
• the reducing element may take the form of a vehicle gearbox or a reduction gear mounted on a vehicle train and coupled to the rotary electric machine.
• the rotary electrical machine is capable of operating in an alternator mode in particular to supply energy to the battery and to the on-board network of the vehicle, and in an engine mode, to ensure the starting of the heat engine, and / or to participate in vehicle traction alone or in combination with the engine.
• a connecting sleeve of generally tubular shape comprising a first grooved part intended to cooperate with a grooved end of the 'shaft of the rotary electrical machine, and a second grooved part intended to cooperate with a grooved end of a shaft of the reducing element.
• the connecting sleeve In operation, the connecting sleeve is free to perform translations along its axis. The sleeve stops in translation when it comes into contact with a shoulder on the shaft. The axial play between these two mechanical parts is low and is notably less than 2 mm. The contact between the connecting sleeve and the shaft, which are made of steel, will therefore generate noises and clicks. In an extreme case, the sleeve can even resonate and damage the system.
• stator in particular surrounding the rotor
• a front bearing comprising a housing for receiving a bearing ensuring rotational guidance of the shaft
• the shaft comprising one end projecting axially with respect to the bearing, the end of the shaft comprising splines,
• connecting sleeve comprising:
• first grooved part intended to cooperate with the grooved end of the shaft of the rotary electric machine
• second grooved part intended to cooperate with the grooved end of the shaft of the reducing element
• a damper arranged axially between the first grooved part and the second grooved part of the connecting sleeve.
• the invention makes it possible, thanks to the presence of the shock absorber, to avoid impacts between a shaft and the connecting sleeve. This reduces noise and clicks during the operation of the motor vehicle.
• the damper is disposed axially between the grooved end of the shaft of the rotary electrical machine and the grooved end of the shaft of the reducing element so as to prevent direct axial contact between the end splined on the shaft of the rotating electrical machine and the splined end of the shaft on the reducing element.
• the damper is interposed axially between the grooved end of the shaft of the rotary electrical machine and the grooved end of the shaft of the reducing element.
• the damper is disposed outside the grooves of the grooved end of the shaft of the rotary electric machine and / or outside the grooves of the grooved end of the shaft of the reducing element. In other words, the damper does not transmit the torque from the shafts to the sleeve.
• the damper is made of an elastic material.
• an axial clearance between the shafts and the shock absorber is less than an axial clearance between a shoulder of the shaft and the connecting sleeve.
• the damper has a lubricant passage, so that the lubricant can move from the first grooved part to the second grooved part of the connecting sleeve, and vice versa.
• the damper has an annular shape. According to one embodiment, the damper is arranged in an internal groove of the connecting sleeve.
• the internal groove of the connecting sleeve axially separates the first grooved part and the second grooved part of the connecting sleeve.
• the internal groove of the connecting sleeve is arranged axially between the first grooved part and the second grooved part of the connecting sleeve.
• the connecting sleeve comprises two internal grooves axially spaced from one another and the damper has a U-shaped section whose two branches are inserted respectively in the two annular grooves.
• said assembly comprises at least one seal disposed at one end of the connecting sleeve.
• the reducing element is a motor vehicle gearbox.
• the reducing element is a reduction gear mounted on a train of the vehicle and coupled to the rotary electric machine.
• the invention also relates to a motor vehicle characterized in that it comprises an assembly as previously defined.
• Figure 1 is a perspective view of a rotary electrical machine according to the present invention
• Figure 2 is a longitudinal sectional view of the rotary electrical machine according to the invention
• Figure 3 is a longitudinal sectional view illustrating the coupling between the shaft of the rotary electrical machine and the shaft of the reducing element by means of a connecting sleeve according to the invention
• Figure 4 is a cross-sectional view of the connecting sleeve according to the present invention.
• an orientation from front to rear is considered, an orientation going from left to right in FIGS. 1 and 2.
• an element “before” is meant an element located on the side of the front bearing 19 and by “rear” element an element situated on the opposite side, that is to say on the side of the electronic control module 34.
• Figures 1 and 2 show a rotary electric machine 10 comprising a polyphase stator 1 1 surrounding a rotor 12 mounted on a shaft 13 of axis X corresponding to the axis of the electric machine 10.
• the stator 1 1 surrounds the rotor 12 with presence of an air gap between the internal periphery of the stator 11 and the external periphery of the rotor 12.
• the stator 1 1 is mounted in a casing 14 comprising a front bearing 15 and a rear bearing 16.
• the front bearing 15 and the rear bearing 16 each comprise a receiving housing 17, 18 of a corresponding bearing 19, 20 which provides for rotational guidance of the shaft 13.
• This electric machine 10 is intended to be coupled to a speed reducing element 22 via a connecting sleeve 48, as shown in FIG. 3.
• the reducing element 22 may take the form of a motor vehicle gearbox or a reduction gear mounted on a vehicle train and coupled to the rotating electric machine 10.
• the electric machine 10 is able to operate in an alternator mode to supply in particular energy to the battery and to the on-board network of the vehicle, and in an engine mode, to ensure the starting of the heat engine of the vehicle, and if necessary to participate in the traction of the vehicle alone or in combination with the engine.
• the power of the machine could for example be between 15kW and 50kW.
• the rotor 12 comprises a body 24 in the form of a pack of sheets.
• Permanent magnets 25 are implanted in cavities 26 of the body 24.
• the magnets 25 may be made of rare earth or ferrite depending on the applications and the desired power of the machine.
• the rotor 12 has two flanges 28, 29 each pressed against an axial end face of the rotor 12. These flanges 28, 29 provide an axial retention of the magnets and also serve to balance the rotor 12.
• the stator 1 1 comprises a body 31 consisting of a pack of sheets and a coil 32.
• the body 31 is formed by a stack of sheets of sheets held in the form of a pack by means of a suitable fixing system, such as rivets .
• the stator body 1 1 is provided with teeth defining notches for mounting the winding 32.
• the winding 32 comprises a set of phase windings passing through the notches and forming buns extending projecting on either side of the stator body 1 1.
• the winding 32 is obtained here from conductive elements in the form of pins connected together for example by welding.
• the winding 32 comprises phase windings, for example of the double three-phase type connected in star and / or in triangle. Phase outputs are intended to be connected to an electronic control module 34.
• the electronic control module 34 comprises a heat sink 35 on which are fixed in particular power modules 36, for example by screwing. These power modules 36 incorporate switches in known manner, for example taking the form of MOS type transistors, making it possible to control the phases of the rotary electric machine 10 in motor mode or in alternator mode. The switching of these transistors is controlled by a control unit.
• the electronic control module 34 is mounted flat, via the heat sink 35, against the rear face of a transverse wall of the rear bearing 16.
• the electric machine 10 comprises a cooling circuit 38 having an inlet 39 and an outlet 40 for coolant, such as a water or oil-based liquid.
• the cooling circuit 38 has a cooling chamber 41 formed in the mass of the heat sink 35 and a cooling chamber 42 surrounding the stator 11.
• the cooling chamber 42 is delimited by the external periphery of an annular wall of the front bearing 15 and the internal periphery of an annular wall of the rear bearing 16. This cooling chamber 42 is closed at its axial ends by two seals 46 of toric type.
• the stator 11 is mounted hooped inside the front bearing 15 so as to establish an intimate contact between the outer periphery of the stator body 11 and the inner periphery of the side wall of the front bearing 15.
• the shaft 13 of the electric machine 10 and a shaft 47 of the reduction element 22 are coupled by means of a connecting sleeve 48 of axis X1.
• the connecting sleeve 48 is coaxial with the shaft 13 of the electric machine 10 and the shaft 47 of the reducing element 22.
• the connecting sleeve 48 of generally tubular shape comprises a first grooved part 48.1 intended to cooperate with the grooved end 49 of the shaft 13 of the electric machine 10 protruding axially relative to the bearing 19.
• the connecting sleeve 48 also comprises a second grooved part 48.2 intended to cooperate with the grooved end of the shaft 47 of the reducing element 22.
• the connecting sleeve 48 may also include two end portions 55.1, 55.2 non-grooved with a larger diameter relative to the grooved parts 48.1, 48.2.
• the difference in diameter between an end portion 55.1, 55.2 and a corresponding fluted portion 48.1, 48.2 defines a shoulder (cf. FIG. 4).
• a shoulder of a shaft 13, 47 may come to bear against a corresponding shoulder of the sleeve 48.
• the splines formed in the end of the shaft 13 of the electric machine 10 and in the end of the shaft 13 of l reducing element 22, as well that the corresponding grooves of the connecting sleeve 48 have an axial orientation relative to the axis X.
• the two fluted parts 48.1, 48.2 have an annular shape.
• the grooves of the parts 48.1, 48.2 are formed in an internal periphery of each annular part 48.1, 48.2.
• the two annular parts 48.1, 48.2 are coaxial with each other.
• a damper 51 is disposed axially between the first part 48.1 and the second part 48.2 of the connecting sleeve 48, ie between the shafts 13 and 47.
• the damper 51 is interposed, in particular with clearance, axially between the grooved end of the shaft 13 of the rotary electric machine 10 and the grooved end of the shaft 47 of the reducing element 22. It can oppose thus to direct contact between the two trees.
• the damper is disposed outside the grooves of the grooved end of the shaft 13 of the rotary electric machine 10 and / or outside the grooves of the grooved end of the shaft 47 of the reducing element 22
• the shock absorber does not transmit the torque from the shafts to the sleeve.
• the damper 51 is disposed in an internal groove 53 of the connecting sleeve 48 provided for this purpose.
• the damper 51 has two annular flanges inserted in corresponding grooves so as to have a U-shaped cross section.
• the damper 51 is made of an elastic material, such as for example rubber or a deformable plastic material.
• the material chosen preferably has good resistance to hydrocarbons and impact.
• the axial clearance between the shafts 13, 47 and the damper 51 is less than the axial clearance between a shoulder of a shaft 13, 47 and the connecting sleeve 48.
• the connecting sleeve 48 thus comes into contact with the damper 51 before coming into contact with a shaft 13, 47 which limits the compression of the damper 51. This makes it possible to reduce noise and vibrations during operation.
• the damper 51 has a lubricant passage, so that the lubricant can move from the first part 48.1 to the second part 48.2 of the sleeve 48 and vice versa. This makes it possible to obtain an optimal distribution of the lubricant inside the sleeve 48.
• the damper 51 may have an annular shape, so that the internal periphery of the damper 51 defines the passage of lubricant.
• the lubricant consists for example of grease.
• a seal 54 is disposed at one end of the connecting sleeve 48.
• the seal 54 may for example be arranged in a groove in the shaft 47 of the reducing element 22. Sealing can also be ensured on the side of the shaft of the electric machine.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Motor Or Generator Frames (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=65201454

Family Applications (1)

Country Status (6)

Cited By (2)

Citations (6)

Family Cites Families (11)

• 2018
  • 2018-09-14 FR FR1858311A patent/FR3086127B1/fr active Active
• 2019
  • 2019-09-13 EP EP19766035.0A patent/EP3850235A1/fr active Pending
  • 2019-09-13 KR KR1020217010629A patent/KR20210058890A/ko active IP Right Grant
  • 2019-09-13 JP JP2021513972A patent/JP7179162B2/ja active Active
  • 2019-09-13 WO PCT/EP2019/074553 patent/WO2020053420A1/fr unknown
  • 2019-09-13 CN CN201980065171.3A patent/CN113167331B/zh active Active

Patent Citations (6)

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