Classifications

• • 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
  • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
  • H02K5/124—Sealing of shafts
• • 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
  • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Definitions

• the invention relates to an electric drive unit for a motor vehicle, in which a wheel hub drive driving a vehicle wheel is provided.
• wheel hub drives are used in particular in electric vehicles.
• the object of the invention is therefore to provide an electric drive unit for a motor vehicle, which has a particularly effective seal against the ingress of moisture and / or foreign bodies in the wheel hub drive.
• the electric drive unit according to the invention for a motor vehicle has a wheel hub drive driving a vehicle wheel, which is arranged on the vehicle wheel via a wheel bearing, the wheel hub drive having a rotor and a stator.
• a sealing device to be provided between the rotor and the stator and / or between the rotor and a component adjacent to the rotor and / or between the stator and a component adjoining the stator, wherein a sealing surface of the sealing device is provided on one Radius with center around a virtual tilting axis se of the wheel bearing or substantially along a tangent to this radius is arranged.
• the sealing surface of the sealing device which is designed as an active sealing surface, can act radially to the tilting axis of the wheel bearing and thereby an axial displacement of the rotor and / or the stator and / or the adjoining components no significant effect on the gap width between these components, in which the sealing device is arranged, has.
• This is particularly possible even if, for example, during strong cornering of the motor vehicle, in which there is a strong tilting of the wheel bearing and thus an increased displacement of the components of the wheel hub drive in the axial direction of the stator, the rotor and the adjacent components.
• This makes it possible that even on a very large radius centered around the virtual tilt axis of the wheel bearing an efficient seal can be made.
• the sealing surface has a dome shape with center around the virtual tilt axis of the wheel bearing.
• Dome-shaped or dome-shaped here means that the sealing surface is preferably formed in this area as a flattened spherical section, which is shaped as a flat dome. This makes it possible, the main direction of the relative displacement of the sealed adjacent components, such as the rotor, the stator and / or the adjacent components, to be considered in a tilting of the tilting axis.
• the sealing device has a sealing element which is designed as a gap seal, in particular as a labyrinth seal.
• a labyrinth seal By means of the labyrinth seal it is possible to produce a non-contact seal.
• the sealing element can advantageously be used even at high speeds, high pressures and / or high temperatures of the wheel hub drive.
• the penetration of such a labyrinth seal penetration of foreign substances or foreign bodies is particularly effective possible.
• the sealing device further comprises, according to a preferred embodiment of the invention, a fatty ring or an elastic filling compound or a plastic filling compound.
• a fatty ring or an elastic filling compound or a plastic filling compound By providing such a fat ring or a filling compound, a particularly effective sealing by the sealing device is possible.
• This fat ring or the filling compound can be arranged as a kind of pre-seal around the peripheral surface of the actual sealing element around to keep the sealing element itself as clean as possible and to prevent direct impact of spray water and dust on the sealing element.
• the sealing device is furthermore preferably arranged partially in a recess provided on the rotor and / or the stator and / or the adjacent component. Thereby, at least a portion of the sealing device is arranged protected by being preferably embedded in the recess, whereby the forces acting on the sealing means can be reduced, so that the life of the sealing device can be increased.
• the sealing device has a ring element, wherein the ring element is slidably disposed.
• the ring element can be provided, for example, in each case in a recess of the opposing components to be sealed, such as the stator, the rotor and / or the adjacent thereto component, preferably within these recesses a filling is provided, by means of which the ring element can slide within the recesses, so that the ring element is preferably arranged slidably two opposite side surfaces of the ring member.
• a partial region of the stator with a partial region of the rotor and / or a partial region of the stator with a partial region of the component adjacent to the stator and / or a partial region of the rotor with a partial region of the Rotor adjacent component arranged overlapping each other. Due to the overlapping arrangement, a particularly effective sealing effect of the sealing device can be achieved, the intrusion of coarse dirt particles or foreign bodies into the gap between the respective components of the wheel hub drive in which the sealing device is provided already being prevented by the overlapping arrangement.
• the invention relates to a motor vehicle, in particular an electric motor vehicle, comprising an electric drive unit designed and developed as described above.
• Fig. 1 is a schematic sectional view of an electric drive unit
• FIG. 2 is a schematic sectional view of a portion of the electric drive unit shown in FIG. 1 with possible positions of a sealing device according to the invention
• Fig. 3 is a schematic representation of the sectional view of the shown in Fig. 2
• FIG. 4 is a schematic sectional view of a sealing device according to the invention according to a first embodiment
• Figure 5 is a schematic sectional view of a second embodiment of the inventive sealing device.
• Fig. 6 is a schematic sectional view of a third embodiment of the inventive sealing device.
• FIG. 7 is a schematic sectional view of a fourth embodiment of the sealing device according to the invention.
• Fig. 8 is a schematic sectional view of a fifth embodiment of the inventive sealing device.
• FIG. 1 shows an electric drive unit with a wheel hub drive driving a vehicle wheel, which is arranged via a wheel bearing 10 on the vehicle wheel, which has a wheel carrier 12 and a rim 14, the wheel hub drive having a rotor 16 and a stator 18.
• the rotor 16 is here preferably designed in the form of a sheet, wherein the rotor 16 can rotate about the fixed stator 18.
• the stator 18 has a stator attachment 20 and a coil 22 arranged on the stator attachment 20, which can interact with a magnet 24 provided on the rotor 16 in order to be able to initiate a rotational movement of the rotor 16.
• FIG. 2 shows a detail of FIG. 1 shown electric drive unit, in which case a cover 26 is provided between the rotor 16 and the stator 20. As shown in FIG. 2 can be seen, is between the Abdeckele- Ment 26 and the rotor 16, a gap 28 and between the cover 26 and the stator 20, a gap 30 is provided. In one or in both of these gaps 28, 30, a sealing device according to the invention can be arranged. Furthermore, it is possible to provide a further sealing device according to the invention in the region marked with 32 between the stator attachment 20 and another component, not shown here, such as, for example, the wheel carrier 12.
• FIG. 3 shows a radius 34, along which a tilting of the wheel hub drive with a center about a virtual tilting axis 36 of the wheel bearing 10 can take place.
• the sealing surface of the sealing device is arranged on the radius 34 with center about the virtual tilt axis 36 of the wheel bearing 10 or substantially along a tangent to this radius 34. This is shown in FIGS. 4-8, in which each embodiment of the embodiment of the sealing device according to the invention are shown, shown.
• FIG. 4 shows a sectional illustration of a partial region 38, for example of the rotor 16, and a partial region 40, for example of the cover element 26, wherein these partial regions 38, 40 are arranged overlapping one another and wherein between these partial regions 38, 40 a gap 42 is provided, which is provided with an inventive Sealing device 44 is sealed.
• the gap 42 may be formed as a gap 28, 30 and / or be provided in the region 32.
• the sealing device 44 is in this case at least partially disposed in a provided on the portion 40 of the cover member 26 recess 46 at least partially.
• the partial regions 38, 40 are in this case shaped such that the sealing surfaces 48 of the sealing device 44 follow the radius 34.
• FIG. 5 shows a further embodiment of the sealing device 44 according to the invention, wherein the sealing device 44 is again provided between a partial region 38 and a partial region 40.
• the partial region 38 is bent back in the region of the sealing device 44 counter to its formation direction, wherein the bending back takes place in such a way that the sealing device 44 in the Subregion 38 is located on the radius 34.
• the sealing effect of the sealing device 44 in particular if the sealing device 44 has a sealing element in the form of a labyrinth seal, can thereby be increased.
• the sealing device 44 is provided in a recess 46 of the portion 40.
• FIG. 6 shows an embodiment of the sealing device 44 according to the invention, in which the sealing device 44 has a ring element 50, which is inserted into the gap 42 to be sealed and can slide on both sides on an intended filling 52.
• the filling 52 is in each case provided on the recesses 46 provided in the subregions 38, 40.
• FIGS. 7 and 8 each show embodiments for the sealing device 44 according to the invention, which is preferably arranged on the gap 30 and / or in the region 32.
• the portions 54, 56 are formed bent at a certain angle, wherein the angle of the bend preferably corresponds to a tangent to the radius 34, so that the intended sealing means 44 is arranged along this tangent, by the sealing means 44 in the gap 58 is provided between the sub-areas 54, 56.
• a partial region 60 for forming a labyrinth is bent in such a way that it at least partially encloses the partial region 62 which seals with the partial region 60.
• Subareas 38, 40, 54, 56, 60, 62 may be understood to mean subregions of the rotor 16, the stator 18, the cover element 26 or other components of the wheel hub drive.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
• Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43972602

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Family Cites Families (9)

• 2010
  • 2010-10-26 DE DE102010049613A patent/DE102010049613A1/de not_active Withdrawn
  • 2010-12-01 CN CN201080043821.3A patent/CN102577038B/zh not_active Expired - Fee Related
  • 2010-12-01 WO PCT/EP2010/068652 patent/WO2011069872A2/de active Application Filing
  • 2010-12-01 US US13/513,697 patent/US8866354B2/en not_active Expired - Fee Related
  • 2010-12-01 EP EP10788059A patent/EP2510606A2/de not_active Withdrawn

Non-Patent Citations (1)

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