• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1051196A1
    申请号:SE1051196
    申请日:2010-11-15
    公开日:2012-05-16
    发明作者:Pontus Karlsson；Oskar Prinsback
    申请人:Bae Systems Haegglunds Ab；
    IPC主号:
    专利说明:

    Preferred embodiments of the electric drive device are defined in appended dependent claims 2-16.
    According to the invention, the objects are achieved with an electric drive device comprising an electric motor with a stator and a rotor arranged to rotate a drive shaft, said electric motor being arranged to be housed in a housing, further comprising the opposite, surrounding the electric motor, gear housing, each accommodating a transmission configuration , characterized by a housing configuration in which both the electric motor and said opposite gear housing are housed, the respective gear housing being attached and thereby locked to said housing configuration.
    By locking the respective gear housings in said housing configuration it is possible to extend the life of the electric motor in that said locking enables external loads substantially only affecting the housing configuration which is allowed to bend while the electric motor is substantially unaffected whereby no loads or only small loads are transferred to the electric motor. arranged on a motor vehicle. This prevents the stator and rotor from coming into contact with each other, which can lead to the electric motor becoming unusable. Furthermore, this facilitates assembly and disassembly of the electric motor in that said gear housing and electric motor constituting an electric drive unit can be mounted separately and then easily inserted into the housing configuration for mounting by said axial and radial locking and removed from the housing configuration during disassembly.
    According to an embodiment of the electric drive device, the respective gear housings are locked both axially and circumferentially in said housing configuration.
    This results in a stable locking.
    According to an embodiment of the electric drive device, the respective gear housing is fastened to said housing configuration by means of circumferentially distributed fastening elements. In this way a stable fastening and locking is obtained both axially and circumferentially.
    According to an embodiment of the electric drive device, the respective gear housing is attached to said housing configuration by means of a geometric reading.
    As a result, no fastening elements such as screw connections or the like are required. The geometric reading is achieved according to a variant by means of a spline configuration.
    According to an embodiment of the electric drive device, said housing configuration has a substantially annular cross-section. This facilitates insertion into and removal from the housing configuration of the electric drive unit, i.e. electric motor and gearbox with transmission. Furthermore, good load absorption of the housing configuration is obtained and avoidance of load transfer to the electric motor is facilitated.
    According to an embodiment of the electric drive device, there is a mounting plane running radially of the housing configuration for each gear housing.
    By attaching the housing configuration with the respective gear housing to the said continuous mounting plane, it is possible to minimize the transfer of external loads to the electric motor.
    According to an embodiment of the electric drive device, the housing configuration is arranged to be fastened in connection with said fastening plane.
    By attaching the housing configuration with the respective gearbox housing to said running mounting plane, the transfer of external loads to the electric motor is minimized.
    According to an embodiment of the electric drive device, the drive device is intended to be attached to said mounting plane in a frame construction of a vehicle intended to be propelled by means of the drive device. This minimizes the transfer of external load to the electric motor so that substantially all load is taken up by the housing configuration so that the housing configuration due to external loads is bent so that its center axis between said mounting plane is below the center axis at the mounting plane, and its center axis at its edge area outside said mounting plane is above the center axis at the mounting plane so that substantially no height difference occurs at the mounting plane one.
    According to an embodiment of the electric drive device, the drive device comprises a drive shaft element connected to said housing configuration and wherein bending stresses in the drive shaft element are transferable to said housing configuration. This bends the housing configuration under load.
    According to an embodiment of the electric drive device, said drive shaft element is arranged to run substantially across the longitudinal direction of a vehicle intended to be propelled by means of the drive device.
    This results in efficient operation of the vehicle.
    According to an embodiment of the electric drive device, said drive shaft element is arranged substantially coaxially with said electric motor.
    This results in efficient operation of the vehicle.
    According to an embodiment of the electric drive device, said fastening elements are arranged to run radially in housing configuration and gear housing.
    This provides efficient axial and radial locking.
    According to an embodiment of the electric drive device, said fastening elements are intended to be inserted into substantially radially extending openings of the opening. The housing configuration is wider than the corresponding opening of the housing configuration and gear housing, respectively of said gear housing. This enables fastening even when axial fitting of the house configuration and drive unit, ie. electric motor and gearbox with transmission are slightly mismatched so that the tolerance level of the house configuration and drive unit is taken into account, which means that the tolerance level can be relatively rough, which reduces costs.
    According to an embodiment of the electric drive device, said fastening element comprises screw connections. This provides simple and efficient axial and radial locking.
    According to an embodiment of the electric drive device, in the area of attachment of housing configuration and gear housing, the housing configuration has an internally concave bulge or the gear housing has an externally concave bulge.
    This enables effective maintenance of the seal between the housing configuration and the gearbox housing as the housing configuration is bent relative to the gearbox housings.
    According to an embodiment of the electric drive device, the stator is attached to said gear housing. This makes it possible to reduce the components included. No extra housing for the electric motor is required.
    DESCRIPTION OF THE DRAWINGS The present invention will be better understood with reference to the following detailed description read in conjunction with the accompanying drawings, in which like reference numerals refer to like parts throughout the many views, and in which: Fig. 1 schematically illustrates a motor vehicle according to an embodiment of the present invention; Fig. 2a schematically illustrates a front view of an electric drive unit comprising an electric motor and a gearbox housing according to an embodiment of the present invention; Fig. 2b schematically illustrates a side view of the electric drive unit of Fig. 2a; Fig. 3 schematically illustrates a housing configuration according to an embodiment of the present invention, Fig. 4a schematically illustrates an axial cross-sectional view of an electric drive device according to an embodiment of the present invention; Fig. 4b schematically illustrates an axial cross-sectional view of an electric drive device according to an embodiment of the present invention; Fig. 5a schematically illustrates an axial cross-sectional view of a detail of the electric drive device in fig. 4a; Fig. 5b schematically illustrates an axial cross-sectional view of a detail of an electric drive device according to an embodiment of the present invention; Fig. 6a schematically illustrates a radial cross-sectional view A-A of the electric drive device of Fig. 4a; Fig. 6b schematically illustrates an axial cross-sectional view of a detail of an electric drive device according to an embodiment of the present invention; Fig. 7a schematically illustrates an axial cross-sectional view of a detail of an electric drive device according to an embodiment of the present invention; Fig. 7b schematically illustrates a plan view of a detail of the detail in Fig. 7a; Fig. 8a schematically illustrates a radial cross-sectional view of a detail of an electric drive device according to an embodiment of the present invention; and Fig. 8b schematically illustrates a radial cross-sectional view of an electric drive device according to an embodiment of the present invention.
    DESCRIPTION OF EMBODIMENTS Fig. 1 schematically illustrates a motor vehicle 1 according to an embodiment of the present invention. The exemplary vehicle 1 consists of a heavy vehicle in the form of a work vehicle such as a mining work vehicle. The vehicle may alternatively be a military vehicle. The vehicle is constituted according to a variant of any suitable vehicle where conventional axles are used. The motor vehicle 1 comprises an electric drive device 10 according to the present invention.
    The motor vehicle 1 is intended to be propelled by means of the drive device 1.
    The motor vehicle 1 comprises a vehicle body 2 comprising a vehicle frame.
    The electric drive device comprises an electric drive unit shown in Fig. 2a comprising an electric motor 20 and on each side of the electric motor 20a. 30b transmission configuration of which a variant is shown in Fig. 4b. The electrically arranged gear housings which house a respective drive device comprise a housing configuration 40 arranged to house said electric drive unit 10. Gear housings 30a, 30b, electric motor 20 and transmission configuration are shown, inter alia, in Fig. 4b. The drive device, i.e. electric motor 20 and gearbox with transmission configuration are transverse to the direction of travel of the vehicle 1 so that the PTO shaft is not required.
    The electric drive device is attached via the housing configuration 40 to the radially extending mounting plane P1, P2 of a frame construction of the motor vehicle. Said mounting plane P1, P2 is shown in more detail in fig. 4a-b and 5a-b.
    Said fastening between frame structure and drive device is effected according to a variant via fastening means 4a, 4b, so-called damping pads, which can form integral parts of the housing configuration 40 or alternatively separate parts.
    By attaching the electric drive device to said mounting plane P1, P2 to the frame structure of the vehicle body 2, transmission of external load to electric motor 20 is minimized so that substantially all load is taken up by housing configuration 40 so that housing configuration 40 bends due to external loads so that its center axis X between said mounting plane P1, P2 is below the center axis X at the mounting plane P1, P2, and its center axis at its edge area outside said mounting plane P1, P2 is above the center axis at the mounting plane P1, P2 so that substantially no height difference occurs at the mounting plane P1, P2. Accordingly, substantially no bending of the housing configuration 40 occurs at said mounting plane P1, P2, at said center axis and also at the connection point of fasteners 4a, 4b at the housing configuration 40. This substantially avoids bending of the electric motor 20 so that the stator and rotor of the electric motor 20 do not come into contact. with each other so that the electric motor 20 is destroyed.
    The electric drive device comprises a drive shaft element 5 connected to said housing configuration 40 are transferable to said housing configuration 40. At drive shaft elements 5 and wherein bending stresses at the respective end of the drive shaft element 5, hub means 6a, 6b are arranged.
    The hub members 6a, 6b are constituted according to a variant of hub reductions 6a, 6b.
    The hub means according to an alternative variant consist of drive wheels for tracked vehicles, which according to a variant comprise hub reduction gears. At the respective hub reduction 6a, 6b, ground contact means 7a, 7b are arranged for propelling the vehicle 1. The ground contact means 7a, 7b are constituted according to a variant of wheels.
    According to an alternative variant, the ground contact means 7a, 7b consist of bands.
    Said drive shaft element 5 is arranged to run substantially across the longitudinal direction of the vehicle 1 intended to be propelled by means of the electric drive device. Said drive shaft element 5 is arranged substantially coaxially with said electric motor 20. As a result, efficient operation of the vehicle 1 is obtained.
    According to a variant, the electric drive device is intended to deliver relatively high output torques and to have a relatively high output speed. According to a variant, the electric drive device comprising said hub reductions 6a, 6b is configured to deliver for the electric output torque in the order of 200 kNm, the drive unit in addition to hub reduction is corresponding torque in the order of 10 kNm, according to this embodiment, and have a maximum output speed closer to 100 rpm , for the electric drive in addition to hub reduction, the corresponding speed is closer to 2000 rpm.
    The housing configuration 40 is configured to be load-bearing and designed to handle heavy loads, according to a variant loads in the order of 100-400 tons.
    The housing configuration 40 is arranged to support external loads at said attachment. The housing configuration 40 is configured so that external loads, for example from the sides via eg hub reduction, are carried up in the structure of the housing configuration 40 so that such loads do not affect transmission configurations or electric motor 20. The housing configuration 40 is arranged to absorb driving moments from the electric motor 20. Such loads include loads during operation of the electric drive device, loads from above, etc.
    The above values are examples only and any suitable electric drive device may be used depending on the application. Accordingly, the present invention comprises an electric drive device having a torque greater than 200 kNm or substantially lower output torque than 200 kNm, and being designed for loads heavier than 100-400 tons, or lighter loads than 100-400 tons.
    Fig. 2a comprising electric motor 20 and gear housing according to an embodiment of the present diagrammatically illustrates a front view of an electric drive unit invention and Fig. 2b a side view of the electric drive unit of fig. 2a.
    The electric drive unit 10 comprises, as mentioned, an electric motor 20.
    According to this variant, the electric motor 20 has a substantially circular-cylindrical shape with a substantially circular cross-section.
    The electric drive unit 10 comprises a first gear housing 30a arranged to house a first transmission configuration, and a second gear housing 30b arranged to house a second transmission configuration, the electric motor 20 being arranged between said gear housings 30a, 30b. According to this variant, the electric drive unit comprises a differential device 50.
    The electric drive unit 10 is arranged to be housed in a housing configuration shown in fig. 3.
    Fig. 3 schematically illustrates the housing configuration 40 according to an embodiment of the present invention. The housing configuration 40 is arranged to receive the electric drive unit 10 according to Figs. 2a-b.
    The housing configuration 40 has a substantially annular cross-section with an imaginary center axis X. According to this embodiment, the housing configuration 40 has a substantially circular cross-section. This facilitates insertion into and removal from the housing configuration 40 of the electric drive unit 10, i.e. electric motor 20 and gearbox with transmission configuration. Furthermore, good load absorption of the housing configuration 40 is obtained and avoidance of load transfer to electric motor 20 is facilitated.
    The housing configuration 40 comprises fastening means 4a for fastening the housing configuration 40 to the framework of a motor vehicle, for example according to Fig. 1. According to a variant, the housing configuration has further fastening means 4c, 4d, 4e, 4f for adaptation to different vehicles / frameworks. Furthermore, the housing configuration has an opening 8 for cabling.
    Fig. 4a schematically illustrates an axial drive device I according to the present invention, Fig. 4b an axial cross-sectional view of a cross-sectional view of an electric an electric drive device 11 in more detail according to an embodiment of the present invention. Fig. 5a schematically illustrates an axial cross-sectional view of a detail of the electric drive device I in Fig. 4a, and Fig. 6a schematically illustrates a radial cross-sectional view A-A of the electric drive device I in Fig. 4a.
    The electric drive device I; II comprises an electric drive unit comprising an electric motor 20 and gearboxes 30a, 30b and connected to the electric motor 20 and arranged on respective sides of the electric motor 20, respectively housing a transmission configuration 60, 70, and a housing configuration 40 in which the electric drive device is housed.
    Both the electric motor 20 and the opposite gear housings 30a, 30b are consequently arranged to be housed in the housing configuration 40. The respective gear housings 30a, 30b are arranged to be releasably attached and thereby locked both axially and circumferentially to said housing configuration 40. By axially and circumferentially locking respectively 30a, 30b in said housing configuration 40 makes it possible to extend the life of the electric motor 20 in that said locking allows external loads to substantially only affect the housing configuration 40 which is allowed to bend while the electric motor 20 is substantially unaffected whereby 11 loads are transferred to the electric motor 20 when arranged in a motor vehicle, for example according to Fig. 1.
    Furthermore, this facilitates assembly and disassembly of the electric motor 20 in that said electric drive unit 10 comprising said gear housings 30a, 30b connected to each other separately from the housing configuration 40 and electric motor can be easily inserted into the housing configuration 40 for mounting by axially and circumferentially reading gear housings 30a, 30b and housing configuration 40. Furthermore, the electric drive unit 10 can be easily removed from the housing configuration 40 during disassembly by releasing said axial and radial locking between gear housings 30a, 30b and housing configuration.
    The electric motor 20 comprises a rotor 22 and a stator 24, said rotor 22 being connected to a drive shaft 26 or rotor shaft 26 and arranged to rotate said drive shaft 26. The drive shaft 26 is arranged to run concentrically relative to the rotor 22, the rotor 22 being arranged to enclosing the drive shaft 26. The stator 24 is arranged to enclose the rotor 22, the rotor shaft and consequently the rotor 22 being arranged concentrically relative to the stator 24. The drive shaft 26 consequently runs concentrically relative to the intended center axis of the electric motor 20 so that a space 36 between the electric motor 20 and said housing is formed.
    According to the embodiment, the stator is illustrated in fig. 4a attached to said gear housing 30a, 30b, the embodiment illustrated in fig. 4b, the electric drive unit 10 comprises one according to a variant by means of screw connections. According to electric motor housing 28 arranged to enclose the electric motor 20, the stator 24 being fixedly connected to the electric motor housing 28, according to a variant by means of screw connections.
    According to a variant, said gear housing 30a, 30b and the electric motor housing 28 form an integral part.
    The housing configuration 40 has a substantially annular cross-section with an imaginary center axis X. According to this embodiment, the housing configuration 40 has a substantially circular cross-section. According to this embodiment, the electric motor 20 is arranged eccentrically offset in the housing configuration 40 in such a way that the drive shaft 26 of the electric motor 20 runs parallel to and at a distance from the center axis X of the housing configuration 40 to form said space 36. The space 36 is used for positioning a differential device 50. with a differential shaft configuration 52a, 52b and differential gears 54a, 54b and oil sump, and facilitates smooth removal of the wiring from the center of the housing configuration 40.
    The housing configuration 40 constitutes, as described above, a load-bearing structure in the electric drive device. The electric motor 20 is spaced from the inner surface of the housing configuration so that a clearance is formed between the outer surface of the electric motor / stator and the inner surface of the housing configuration 40, where the distance between housing configuration and electric motor 20 according to this embodiment, due to the eccentric location, is shorter. the upper area of the electric drive device.
    The electric drive device comprises an output shaft 12 connected to the drive shaft 26. The output shaft 12 is according to this embodiment aligned with the drive shaft 26. According to this embodiment, the output shaft 12 extends through said drive shaft 26.
    The electric drive device comprises 30a, 30b, transmission configuration opposite, surrounding the electric motor 20, gear housings each accommodating a The electric drive device thus comprises a first gear housing 30a arranged to house a first transmission configuration 60, and a second gear housing 30b arranged to house a second transmission configuration 70. , the electric motor 20 being arranged between said transmission configurations 60, 70.
    The first and second gear housings 30a, 30b have a sleeve-like shape, respectively. Respective gear housings 30a, 30b have a U-shaped axial cross-section and an annular, here circular, radial cross-section. current lot 34a, 34b. The axially extending portion 32a, 32b of the respective gear housings 30a, 30b together with the respective radially extending portion 34a, 34b form a space / housing arranged to house the respective transmission configuration 60, 70.
    The radially extending portion 34a, 34b of the respective gear housings 30a, 30b are arranged so relative to the electric motor 20 that the surface of the radially extending portion 34a, 34b opposite side from which said axially extending portion 32a, 32b of the respective gear housings 30a, 30b protrudes is used. electric motor 20.
    Accordingly, said axially running portion 32a, 32b of the respective gear housings 30a, 30b are arranged to project away from the electric motor 20. The stator 24 of the electric motor 20 is as described above according to a variant illustrated in Fig. 4a fixedly connected to the respective gear housings 30a, 30b. Alternatively, the stator 24 is connected to the electric motor housing 28.
    The axially extending portion 32a, 32b of the respective gear housings 30a, 30b is arranged to abut substantially in the region of the transition to the axial portion 32a, 32b against an inner portion of the housing configuration 40. The axially extending portion 32a, 32b of the respective gear housings 30a, 30b is arranged to run at a distance from the area of the transition to the axial portion 32a, 32b at a distance from the inner surface of the housing configuration 40. According to a variant as shown here, the distance between the outer surface of the axial portion 32a, 32b and the inner the surface of the housing configuration 40 with the axial distance from said area for transition from the radial portion 34a, 34b to the axial portion 32a, 32b. This is shown in more detail in Fig. 5b.
    Said radially running portions 34a, 34b of the respective gear housings 30a, 30b are arranged to form dividers between the transmission configurations 60, 70 and the electric motor 20. These radial portions 34a, 34b are used for supporting the rotor shaft and ring wheels, among other things. Accordingly, the respective radial portions 34a, 34b have an opening for allowing the drive shaft 26 of the electric drive device to pass therethrough. The first transmission configuration according to this embodiment consists of a first planetary gear configuration 60 and the second transmission configuration consists of a second planetary gear configuration 70, the electric motor being arranged between said first and second planetary gear configurations 60, 70.
    The first planetary gear configuration 60 includes planetary gear 62, a sun gear 64, and a ring gear 66. The second planetary gear configuration 70 includes planetary gear 72, a sun gear 74, and a ring gear 76.
    The first and second planetary gear configurations 60, 70 are drivably connected to each other via said output shaft 12. The output shaft 12 is connected to the sun gear 64, 74 of the respective planetary gear configurations 60, 70.
    The differential device 50 is engaged with the ring gear 66 of the first planetary gear configuration 60 and the ring gear 76 of the second planetary gear configuration 70 to provide differential function.
    By using a cylindrical housing 40 with a circular cross-section, an off-white housing 40 is obtained which is simple and inexpensive to manufacture. According to one embodiment, construction elements for the housing configuration 40 consist of a tube with a circular cross-section which is optimal for load-bearing.
    By extending output shaft 12 through said drive shaft 26, a motor-in-shaft solution with output shaft 12 is obtained via planetary gear configuration 60, 70 on each side of the electric motor 20. A motor-in-shaft solution requires no cardan shafts but all power transmission takes place via cable. Specifically for the embodiment according to this embodiment with electric motor 20 eccentrically arranged in the housing configuration 40 with circular cross-section, a compact and volume-efficient device is obtained, while the housing configuration 40 retains a circular-cylindrical shape for best strength and rigidity.
    The electric drive device according to the present invention is intended primarily for medium and heavy special vehicles. In this case, the electric motor 20 is eccentrically placed in relation to the circular-cylindrical housing configuration 40, at the same time maintaining coaxiality between drive shaft 26 and output shaft 12 and consequently drive shaft elements 5 and drive wheels 6a, 6b.
    At the area of said mounting plane P1, P2, the outer peripheral surface of the respective gear housings 30a, 30b is arranged to abut the inner surface of the housing configuration 40. The electric drive device here comprises sealing means 80 for providing a seal between these surfaces to avoid leakage. The seal is consequently arranged to take place in the area of attachment, i.e. at said mounting plane P1, P2, where substantially no play exists between the inner surface of the housing configuration 40 and the outer peripheral surface of respective gear housings 30a, 30b and where housing configuration 40 and gear housings 30a, 30b are arranged to be fastened together both axially and circumferentially.
    According to one embodiment, said sealing means 80 comprises a machining in the area of said fastening plane P1, P2 on the inner surface of the housing configuration 40 and correspondingly a machining on the opposite outer surface, which results in a good seal.
    According to one embodiment, said sealing means 80 comprises sealing means.
    According to a variant, said sealing means consists of an O-ring (not shown), which O-ring is arranged around the circumference of the housing configuration 40 in connection with the fastening elements 90.
    By arranging sealing means 80 between the inner surface of the housing configuration and the outer surface of the respective gear housings 30a, 30b at said mounting plane P1, P2, a good seal is obtained.
    Fig. 5b schematically illustrates an axial cross-sectional view of a detail of an electric drive device according to an embodiment of the present invention.
    According to this embodiment, said sealing means comprises a concave bulge 82 arranged at the area 16 for fastening housing configuration 40 and gear housing 30a, 30b, on respective gear housing 30a, 30b.
    When the electric drive device is loaded so that bending of the housing configuration 40 takes place, no bending will take place at said mounting plane P1, P2, nor any displacement in height. When loaded, however, a certain angle of the housing configuration 40 also occurs in connection with said mounting plane P1, P2, which means that for flat surfaces between housing configuration 40 and gear housing 30a, 30b at the area for attachment, a certain angle will occur between the slightly curved housing configuration 40. and respective gear housings 30a, 30b.
    By arranging, as shown in Fig. 5b, a concave bulge 82 along the outer surface of the respective gear housings 30a, 30b in the area of attachment, i.e. in connection with said mounting plane P1, P2, the seal between housing configuration 40 and gear housing 30a, 30b is maintained independent of bending of the housing configuration 40, i.e. regardless of the angle between the housing configuration 40 30a, 30b at the inner surface of the housing configuration 40, said mounting area is angled relative to the respective gear housing and gear housing. When the outer surface of 30a, 30b, due to the concave bulge 82, the surface of the housing configuration 40 will, when the angle changes relative to the respective gear housings 30a, 30b, follow said concave surface.
    Said concave bulge 82 is dimensioned and configured so that the seal between the surface of the concave bulge 82 and is maintained independently of load, i.e. bending of the housing configuration 40. Said concave bulge 82 has, according to a variant, a substantially spherical design.
    According to an alternative variant, in the area for attachment of housing configuration 40 and gear housings 30a, 30b, and gear housings 30a, 30b, respectively, a concave bulge arranged at the inner surface of the housing configuration 40 has.
    Respective gear housings 30a, 30b of the electric drive device are attached to said housing configuration 40 by means of circumferentially spaced fasteners 90. Said fasteners are, as can be seen from Fig. 6a, arranged to run radially in housing configuration 40 and gear housings 30a, 30b whereby an effective axial and radial locking is obtained. According to this embodiment of the electric drive device, said fastening element comprises screw connections in the form of screws with a screw portion 92 arranged to be passed through the housing configuration 40 and threaded into an opening of the gear housing.
    This provides simple and efficient axial and radial locking.
    According to this embodiment, said fastening element comprises six screw joints 90 at the screw joints 90 distributed along the side of the respective fastening plane P1, P2, where the respective fastening plane P1, P2. According to this embodiment, the upper portion and the lower portion of said mounting plane are P1, P2, i.e. the upper area adjacent to said mounting plane P1, P2 and the lower area adjacent to mounting plane P1, P2 do not have a screw connection. Since the bending will be 40b of the housing configuration 40, where a compression occurs in the upper portion of the largest in the upper portion 40a and the lower portion the housing configuration 40 and an extension takes place in the lower portion of the housing configuration 40 will, by avoiding having fasteners provided there, less impact due to the fasteners during bending.
    Dimension and configuration of fasteners as well as the number of fasteners depend, among other things, on the electric motor power and expected load on the electric drive device.
    Fig. 6b schematically illustrates an axial cross-sectional view of a detail of an electric drive device III according to an embodiment of the present invention with a fastening element 100 according to an embodiment. According to this embodiment, the housing configuration 40 comprises radially extending through openings 42 adjacent to the area of said mounting plane P1, P2. Furthermore, respective gear housings 30a, 30b comprise radially extending blind openings 35 arranged in connection with the area of said mounting plane P1, P2. 40 running openings 42 are wider than the corresponding of respective gear housings 30a, 30b radially running openings 18. Said openings 42 radially extending through the housing configuration 40 are formed according to a variant of circular heels. The said openings 35 of the respective gear housings 30a, 30b are constituted according to a variant of circular heels, preferably threaded holes.
    In that the respective opening 42 of the housing configuration 40 is wider, i.e. has a larger diameter, than the respective corresponding opening 35 of said gear housing 30a, 30b, fastening is possible even when axial fitting of housing configuration 40 and drive unit, i.e. electric motor 20 and gearbox housing 30a, 30b with transmission are slightly mismatched so that the tolerance level of housing configuration 40 and drive unit 10 is taken into account, which means that the tolerance level in terms of axial length of housing configuration 40 and electric motor 20 and gearbox housing 30a, 30b can be relatively coarse, which reduces costs.
    According to this embodiment, respective fastening elements 100 comprise a clamping sleeve configuration 100. Said clamping sleeve configuration 100 comprises a screw element 102 with a screw cap 102a and a screw portion 102b running perpendicular to the screw cap 102, which screw portion 102b is arranged to be inserted through the radial opening 42 of the radial opening 42. the radial opening 35 of the gear housing fitted to the radial opening of the housing configuration 40. Preferably, the screw portion 102b has a thread corresponding to a thread of the radial opening 35 of the respective gear housings 30a, 30b.
    Said clamping sleeve configuration 100 comprises a washer element 105 with an opening. The opening 105a is smaller than said screw cap 102a so that when passing through central 105a for passing through said screw portion 102b. of the screw portion 102a, the cap 102b is stopped by said washer member 105. The cross section of the opening 105a is further larger than the cross section of said screw portion so that upon attachment the screw member 102 is allowed to run axially in the area for attachment adjacent to said mounting plane P1, P2. Said clamping sleeve configuration further comprises a sleeve element 104.
    Said sleeve element 104 comprises a perpendicularly projecting annular portion 106 substantially perpendicular from the periphery of the washer element 105. The projecting annular portion has a pointed end 106a. The pointed end 106a has an angled profile where, according to a variant, the tip is slightly offset from the center of the annular running edge.
    Said sleeve element 104 of the respective clamping sleeve configuration 100 is dimensioned to fit in said respective radially extending opening 42 of the housing configuration 40. According to a variant, said annular portion 106 is arranged to and substantially follow the outer surface adjacent the radially extending opening 42 of the housing configuration 40.
    Said sleeve element 104 of the respective clamping sleeve configuration 100 is further dimensioned so that the pointed edge 106a of said annular portion 106 abuts the outer surface of the gear housing and runs around and at a distance from said radially running opening 35 of the gear housing.
    When attaching the respective clamping sleeve configuration 100, the sleeve element 104 is inserted into the opening 42 radially extending of the housing configuration 40, the screw element 102 being inserted through the opening of the washer element 105 and further axially fitted so that it can be inserted / threaded into the radially extending opening 35.
    The pointed end 106a of the annular portion 106 of the sleeve member 104 is configured so that upon tightening the screw member 102, the pointed edge slightly cuts into the outer surface of the gear housing, locking the housing configuration 40 relative to the gear housing.
    Fig. 7a schematically illustrates an axial cross-sectional view of a detail of an electric drive device IV according to an embodiment of the present invention, and Fig. 7b a plan view of the detail in Fig. 7a.
    According to an embodiment shown in Figs. 7a and 7b, the electric drive device comprises a control configuration for facilitating assembly and disassembly of the drive unit in the housing configuration 40. Said control configuration comprises an at least in the region of one end, according to a variant in the region of the respective end, of the housing configuration At least one gear housing, according to a variant and gear housing 30a, 30b, respectively, further comprises an externally arranged axially running guide groove 37. The guide groove 37 has a portion 37a wider at the side end of the gear housing which tapers and merges into a narrower portion 37b. which substantially corresponds to the width / diameter of the wedge element / groove screw.
    The guide configuration further comprises a wedge element 48 intended for each groove in the form of a groove screw. The wedge element / groove screw has a width / diameter which substantially corresponds to the narrower portion 37b of the guide groove 37.
    The wedge element is intended to be inserted into, according to a variant, screwed in, the radial through groove 45 so that it protrudes inside the housing configuration 40 a distance substantially corresponding to the depth of the guide groove 37. Upon insertion of the electric drive unit 10 with electric motor 20 and gear housing 30a, 30b, the wedge element 48 projecting inside the housing configuration 40 will be guided in the wider portion 37a of the guide groove towards the end of the guide groove 37, the electric drive unit 10 being steered so that drive unit is correctly rotated in relation to the housing configuration 40 so that fastening by means of fastening elements in radial openings of gear housings 30a, 30b and housing configuration is possible. In the variant with radial groove 45 in at the respective end region of the housing configuration 40 and guide grooves in the end region of the respective gear housings 30a, 30b, wedge elements / groove screw 48 are inserted in the second radial groove 45.
    By having separate wedge elements / grooves 48 it is possible that when the electric drive unit 10 is arranged in the housing configuration 40 remove the wedge elements so that the electric drive unit 10 when it is mounted is held only by means in the area for attachment adjacent to said mounting plane P1, P2 in circumferential joints distributed radially running fasteners.
    Above has an electric drive device where the electric motor 20 is eccentrically offset arranged in the housing configuration 40 so that the drive shaft of the electric motor 20 runs parallel to and at a distance from the center axis of the housing configuration 40. According to an alternative variant, the electric motor 20 is concentrically arranged in the housing configuration 40. that the drive shaft of the electric motor 20 runs in line with the center shaft of the housing configuration 40.
    In connection with Fig. 4b, an example of a transmission configuration has been described above. Any transmission configuration can be used here. of respective gear housings as suitable Above, embodiments have been described in which respective gear housings are fastened and in this case both axially and circumferentially locked at said housing configuration 40 by means of circumferentially distributed fastening elements.
    According to an alternative variant, locking of the respective gear housing in the housing configuration is effected by means of a geometric locking. The geometric locking is arranged at least in the area for fastening in connection with said mounting plane P1, P2.
    Fig. 8a schematically illustrates a radial cross-sectional view of a detail of an electric drive device V according to an embodiment of the present invention, in which respective gear housings, of which one gear housing 130a is shown, are attached to 140 by an embodiment of the present invention, where the geometric locking the housing configuration geometric locking according to one comprises a spline configuration, which splines configuration includes of the housing configuration 140 internally arranged splines 142 and correspondingly of respective gear housings 130a arranged external splines 132. Said splines configuration is arranged at least in the area of attachment P1 adjacent to P1. According to a variant, the spline configuration is supplemented with a screw connection (not shown) for axial locking. According to a variant, the geometric locking comprises boom joints.
    Fig. 8b schematically illustrates a radial cross-sectional view of an electric drive device VI according to an embodiment of the present invention, wherein the geometric locking includes an oval shape of the respective gear housings, of which one gear housing 230a is shown, i.e. an oval cross-section, as well as an oval shape of the housing configuration 240. As a result, no radial locking is required.
    According to one embodiment, the electric drive unit is geometrically locked in the circumferential direction, while the electric drive unit is allowed to flow in the axial direction in the housing configuration.
    Above, an electric drive device with a housing configuration for housing an electric drive unit comprising an electric motor 20 and a gearbox housing with a transmission configuration, the housing configuration 40 having a substantially circular cross-section with an imaginary center axis X is described.
    According to an alternative embodiment, the electric drive device has a housing configuration with a substantially elliptical cross-section for receiving and housing an electric drive unit according to the present invention as shown in Fig. 8b. According to an alternative embodiment, the electric drive device has a housing configuration with a substantially ovoid cross-section for receiving and housing an electric drive unit according to the present invention. According to an alternative embodiment, the electric drive device has a housing configuration with a substantially elongate cross-section with parallel sides and semicircular ends for receiving and housing an electric drive unit according to the present invention.
    Features in the above-mentioned embodiments of the electric drive device can be combined, such as fasteners and geometric locking.
    The above description of the preferred embodiments of the present invention has been provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the invention to the variations described. Obviously, many modifications and variations will occur to those skilled in the art. The embodiments have been selected and described to best explain the principles of the invention and its practical applications, thereby enabling one skilled in the art to understand the invention for various embodiments and with the various modifications appropriate to the intended use.
    权利要求:
    Claims (17)
    [1]
    An electric drive device comprising an electric motor (20) with a stator and a rotor arranged to rotate a drive shaft, said electric motor (20) being arranged to be housed in a housing, further comprising opposites, surrounding the electric motor (20), gear housing, each and a housing a transmission configuration, characterized by a housing configuration in which both the electric motor (20) and said opposing gear housings (30a, 30b) are housed, the respective gear housings (30a, 30b; 130a; 230a) being attached and read to said housing configuration (40; 140; 240).
    [2]
    Electric drive device according to claim 1, wherein the respective gear housing (30a, 30b) is read both axially and circumferentially in said housing configuration (40).
    [3]
    Electric drive device according to claim 1, wherein the respective gear housing (30a, 30b) is fastened to said housing configuration (40) by means of circumferentially distributed fastening elements.
    [4]
    An electric drive device according to claim 1 or 2, wherein the respective gear housing (130a; 230a) is attached to said housing configuration (140; 240) by means of a geometric locking.
    [5]
    An electric drive device according to any one of claims 1-4, wherein said housing configuration (40) has a substantially annular cross section.
    [6]
    An electric drive device according to any one of claims 1-5, wherein for each gear housing (30a, 30b; 130a; 230a) there is a mounting plane (P1, P2) running radially of the housing configuration.
    [7]
    Electric drive device according to claim 6, wherein the housing configuration is arranged to be fastened in connection with said fastening plane (P1, P2).
    [8]
    Electric drive device according to claim 6 or 7, wherein the drive device is intended to be attached to said mounting plane (P1, P2) in a frame construction of a vehicle intended to be propelled by means of the drive device. 10 15 20 25 25
    [9]
    Electric drive device according to any one of claims 6-8, wherein the drive device comprises a drive shaft element (5) connected to said housing configuration (40) and wherein bending stresses in the drive shaft element are transferable to said housing configuration (40).
    [10]
    Electric drive device according to claim 9, wherein said drive shaft element (5) is arranged to run substantially across the longitudinal direction of a vehicle (1) intended to be propelled by means of the drive device.
    [11]
    An electric drive device according to claim 9 or 10, wherein said drive shaft element is arranged substantially coaxially with said electric motor 20.
    [12]
    An electric drive device according to any one of claims 3-11, wherein said fastening elements are arranged to run radially in housing configuration and gear housing (30a, 30b).
    [13]
    An electric drive device according to any one of claims 3-12, wherein said fastening elements are intended to be inserted into substantially radially extending openings of housing configuration and gear housing (30a, 30b), each opening of the housing configuration being wider than the respective corresponding opening of said gear housing (30a). , 30b).
    [14]
    An electric drive device according to any one of claims 3-13, wherein said fastening element comprises screw connections.
    [15]
    Electric drive device according to one of the preceding claims, wherein in the area for fastening the housing configuration and gear housing (30a, 30b), the housing configuration has an internally concave bulge or the respective gear housing (30a, 30b) has an externally concave bulge.
    [16]
    An electric drive device according to any one of the preceding claims, wherein the stator is attached to said gear housing (30a, 30b).
    [17]
    Motor vehicle comprising an electric drive unit according to any one of claims 1-16.
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    同族专利:
    公开号 | 公开日
    SE535389C2|2012-07-17|
    CN103210567A|2013-07-17|
    JP2014504131A|2014-02-13|
    AU2011329559B2|2015-05-07|
    CA2815176A1|2012-05-24|
    AU2011329559A1|2013-05-09|
    EP2641319B1|2020-06-17|
    US9677644B2|2017-06-13|
    WO2012067568A1|2012-05-24|
    US20140087905A1|2014-03-27|
    KR20140009194A|2014-01-22|
    EP2641319A1|2013-09-25|
    EP2641319A4|2018-04-18|
    SG189362A1|2013-06-28|
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    法律状态:
    2021-06-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051196A|SE535389C2|2010-11-15|2010-11-15|Electric drive device|SE1051196A| SE535389C2|2010-11-15|2010-11-15|Electric drive device|
    EP11841882.1A| EP2641319B1|2010-11-15|2011-11-11|Electric drive device|
    SG2013027271A| SG189362A1|2010-11-15|2011-11-11|Electric drive device|
    AU2011329559A| AU2011329559B2|2010-11-15|2011-11-11|Electric drive device|
    US13/885,335| US9677644B2|2010-11-15|2011-11-11|Electric drive device|
    JP2013538686A| JP2014504131A|2010-11-15|2011-11-11|Electric drive|
    KR1020137012977A| KR20140009194A|2010-11-15|2011-11-11|Electric drive device|
    PCT/SE2011/051354| WO2012067568A1|2010-11-15|2011-11-11|Electric drive device|
    CN2011800550383A| CN103210567A|2010-11-15|2011-11-11|Electric drive device|
    CA2815176A| CA2815176A1|2010-11-15|2011-11-11|Electric drive device|
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