Classifications

• • 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
  • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
  • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
• • 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
  • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
  • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
• • 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
  • F16D11/00—Clutches in which the members have interengaging parts
  • F16D11/08—Clutches in which the members have interengaging parts actuated by moving a non-rotating part axially
  • F16D11/10—Clutches in which the members have interengaging parts actuated by moving a non-rotating part axially with clutching members movable only axially
• • 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
  • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
  • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
• • 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
  • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
  • B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle

Definitions

• the invention relates to a motorized hub for the electric drive of an axle of a hybrid traction motor vehicle, a motorized wheel comprising such a hub and a motor vehicle comprising at least two motorized wheels.
• the invention applies to motor vehicles having electrically powered wheels that can be decoupled from their electric machine when the vehicle is moved through another source of traction.
• the term “motorized hub” is used to designate the mechanical assembly comprising the hub, the hub-carrier, the guiding of the hub relative to the hub-carrier, the electric motor and the braking means of the hub. .
• the motorized hub is therefore intended on the one hand to receive a wheel equipped for example with a tire and to carry on the other hand a vehicle, generally by means of suspension means.
• the term “motorized wheel” is also used to designate the mechanical assembly comprising the motorized hub defined above and the corresponding wheel.
• SUBSTITUTE SHEET (RULE 26) suspension and wheels. Another difficulty is to obtain a compact system, simple and as light as possible to make the cost acceptable for this industry.
• the integration of electric motors inside the wheels is particularly desirable because the adoption of electric traction often requires the need to ship batteries to store electrical energy which, even with the most powerful technologies known to date, requires to devote a sufficient volume to the batteries in the vehicle, except to greatly reduce the autonomy of an electric vehicle. Similar reasoning can be used for fuel cell or parallel hybrid vehicles.
• parallel hybrid vehicles whose thermal engine generally allows to drive at relatively high speed (for example 150 km / h) represent a particular difficulty in choosing the reduction ratio of electric traction.
• the document WO-201 1/073320 proposes reduction means comprising two reduction stages, coupling / decoupling means comprising a clutch and sliding mechanism being used to be able to couple a ring gear with the hub.
• the reduction means are not rotated by the rotation of the hub when the vehicle is moved through another source of traction, to limit noise and torque induced drag.
• the splash gears being interrupted, the lubrication in particular of the seal ensuring the sealing of the housing on the hub may be insufficient under certain conditions, especially when the electric traction is not used over a long distance.
• the integration of the coupling / decoupling means at the gear ring which is intended to be linked to the hub is restrictive, particularly with respect to the size of said means and the significant torque they must transmit.
• the invention aims to improve the prior art by providing a compact motorized hub, easy to achieve and in which the splash lubrication can be maintained when the electric traction is decoupled, while limiting the induced noise and drag torque.
• the invention proposes a motorized hub for the electric drive of an axle of a hybrid traction motor vehicle, said motorized hub comprising a hub for receiving a wheel, said hub being rotatably mounted. relative to a hub carrier according to a hub axis, the motorized hub comprising an electric traction machine, the electric machine comprising an outer stator connected to the hub carrier and an inner rotor whose axis of rotation is distant from the hub axle, the hub motorized motor comprising reduction means acting between the rotor of the electric machine and the hub, the motorized hub comprising coupling / decoupling means adapted to adopt a coupling position in which the rotation of the electric machine is coupled to the rotation of the hub and a decoupling position in which the rotation of the electric machine is decoupled from the rotation of the hub, the reduction means comprising at least two reduction stages comprising an intermediate shaft equipped with a toothed gear meshing with the rotor of the electric machine and gear reduction gear meshing with the hub, the gear
• the invention proposes a motorized wheel comprising such a motorized hub.
• the invention proposes a motor vehicle comprising at least two motorized wheels.
• FIG. 1 is an overall perspective view of a motorized hub according to one embodiment of the invention.
• FIG. 2 is a partial longitudinal sectional view of a motorized hub according to the invention.
• a motorized hub is described below which is intended to guide and control the rotation of a wheel, in particular for the electric motorization of an axle of a traction motor vehicle. hybrid.
• the motorized hub comprises a hub 1 intended to receive a wheel, said hub being rotatably mounted with respect to a hub carrier 2 along an axis of hub A.
• the hub carrier 2 is a rocket around which the hub 1 rotates by means of a bearing 3 hub.
• the hub axis A is a constant reference in the present application, it is with respect to this axis that we refer to qualify an orientation of "radial” or "axial”.
• an axial orientation is an orientation parallel to the hub axis A and a radial orientation is an orientation perpendicular to the hub axis A.
• the motorized hub comprises an electric traction machine 4, the electric machine 4 comprising an external stator connected to the hub carrier 2 and an inner rotor whose axis of rotation R is distant from the hub axis A.
• the electric machine 4 has an inner rotor whose axis of rotation R is distant from the hub axis A and parallel to said hub axis, that is to say non-coaxial.
• the electric machine 4 assures the motorization and possibly the braking of the hub 1 by means of reduction means acting between the rotor of the electric machine 4 and the hub 1.
• the reduction means comprise at least two reduction stages comprising an intermediate shaft 5, in particular parallel to the hub axis A, said intermediate shaft being equipped with a toothed gear 6 meshing with the rotor of the electric machine 4 and a reduction gear 7 meshing with the hub 1.
• the reduction means comprise a driving pinion 8 intended to be connected to the rotor of the electric machine 4 and a ring gear 9 connected to the hub 1.
• a first reduction stage comprises the gear of the driving pinion 8 and the gear 6 of the intermediate shaft 5
• a second reduction stage comprising the gear of the reduction gear 7 connected to the intermediate shaft 5 and the ring gear 9 connected to the hub 1.
• the overall reduction ratio is preferably greater than 15.
• the motorized hub comprises coupling / decoupling means capable of adopting a coupling position in which the rotation of the electric machine 4 is coupled to the rotation of the hub 1 and a decoupling position (FIG. 2) in which the rotation of the machine 4 is decoupled from the rotation of the hub 1, so as respectively to establish and interrupt the transmission of torque between the reduction means and the hub 1.
• the toothed wheel 6 is rotatably mounted around the intermediate shaft 5 and the coupling / decoupling means are arranged between said gear and said intermediate shaft.
• the coupling / uncoupling means comprise a clutch and sliding mechanism 10, said sliding device being constantly rotationally fixed to the intermediate shaft 5 and comprising means capable of cooperating, in the coupling position, with complementary means. integral with the toothed wheel 6 to drive said toothed wheel and therefore the hub 1 in rotation through the electric machine 4.
• the player 10 is mounted in translation around the intermediate shaft 5 between a coupling position and a decoupling position.
• a fork can be engaged in a groove 1 1 of the player 10 to control its axial position, said range being controlled by a screw actuator and nut comprising a small electric gear motor or an electromagnet.
• said player has cylindrical inner grooves
• the player 10 comprises front teeth 14 adapted to cooperate, in coupling position, with front teeth 15 integral with the toothed wheel 6.
• the teeth 14, 15 are machined respectively at the end of the player 10 and on the sidewall. the toothed wheel 6, the player 10 being pushed against said gear to ensure the coupling.
• the entire transmission that is to say the set of reduction means and coupling / decoupling means, is contained in a sealed casing 17 containing a suitable quantity of a lubricant in order to lubricate the assembly by bubbling.
• a suitable quantity of a lubricant in order to lubricate the assembly by bubbling.
• the stator of the electrical machine 4 is rotatably connected to the hub carrier 2.
• This connection necessary for the transmission of the torque, can be rigid and direct but it can preferably be indirect in order to allow a relative rotational movement at the same time. opportunity of suspension travel. This relative movement is of course limited and aims to allow a certain independence between the transmitted torque and the dynamic rigidities (vertical and horizontal) of the suspension device.
• stator of the electric machine 4 is carried by the housing 17 while said housing is rotatably mounted relative to the hub carrier 2 according to the hub axis A.
• the rotation of the housing 17 relative to the hub carrier 2 can be controlled by a connecting rod acting between the housing 17 and the vehicle body.
• the motorized hub comprises a disc brake whose disc 18 is placed outside the housing 17 relative to the vehicle.
• a drum brake instead of the disc brake.
• An advantageous way of constructing a hybrid vehicle is to combine a conventional thermal engine of the front axle and an electric motorization of the wheels of the rear axle according to the invention.
• the hub carriers 2 of the wheels can each be secured to an arm pulled from the rear axle, for example torsionally, of the hybrid vehicle.
• the source of electrical energy may be a set of batteries or supercapacitors, a fuel cell, an urban network in the manner of trolley buses or any other available electrical source.
• the reduction means are preferably reversible to allow the use of the electric machine 4 in braking mode.
• the electrical energy recovered by the electric machine 4 in braking mode can be stored or dissipated in a manner known per se.
• a motorized hub according to the invention thus allows coupling / uncoupling the electric motor at any time, including during the movement of the vehicle.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• General Engineering & Computer Science (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=47324181

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (5)

• 2011
  • 2011-12-20 FR FR1162077A patent/FR2984242B1/fr not_active Expired - Fee Related
• 2012
  • 2012-12-11 EP EP12798323.7A patent/EP2794319A1/de not_active Withdrawn
  • 2012-12-11 WO PCT/EP2012/075074 patent/WO2013092300A1/fr unknown

Non-Patent Citations (1)

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