Gearwheel for structure-borne sound reduction in electric drives, having a toothed ring and a wheel hub, which has a structured annular or corrugated web between a shaft seat and the toothed ring. The web has a structure designed with deviations from uniform stiffness and mass distribution about an axis of rotation of the gearwheel, and has an axial symmetry to avoid imbalance. The gearwheel has a two-fold, four-fold, six-fold or eight-fold cyclic axial symmetry.

A power transmission device includes a pinion gear having a large pinion gear and a small pinion gear, a carrier that supports the pinion gear, a ring gear that engages with the small pinion gear, an oil supply unit positioned above a horizontal line that passes through a revolution center of the pinion gear, and a downstream side wall part facing a gear surface of the large pinion gear. The downstream side wall part is arranged to be adjacent to the oil supply unit further downstream in a revolution direction of the pinion gear than the oil supply unit when viewed from an axial direction.

An electric drive for a motor vehicle includes: a drive housing with a motor housing section and a motor chamber. A stator and a rotor, the rotor being rotatably mounted relative to the stator by a rotor shaft, are arranged in the motor chamber. The electric drive also includes a parking lock with an engagement mechanism configured to lock the rotor shaft relative to the drive housing is arranged in the electric drive.

The invention can be applied to its specific vehicle types. Control unit (16) adjusts the shaft rotation speed of electric motor 1(13) and electric motor 2(15) in accordance with driving control data (17). While electric motor 1(13) is responsible for forward-backward motion of the vehicle, electric motor 2(15) provides right-left cornering to the vehicle. This cornering is made possible with the change in rotational speed between side wheels (2,3). Directional control via the side wheels (2,3) will not be sufficient for vehicle control at high speeds. For this purpose, a hydraulic system functioning dependent to the side wheels (2,3) is formed. The pulling force generated between the hydraulic cylinder (20) and the end of the hydraulic piston rod (20a) is used to control the direction of the front wheel (1) and/or rear wheel (4) of the vehicle.

A power transmission device includes a gear mechanism, a wall part that overlaps with the gear mechanism in an axial direction, a plate provided between the wall part and the gear mechanism in the axial direction, and a park lock mechanism. The park lock mechanism has a parking pawl on a side of a surface of the plate facing the wall part. The park lock mechanism has a manual shaft and/or a detent mechanism on a side of a surface of the plate facing the gear mechanism.

A device (1) for cooling and lubricating components of a vehicle (2) may include a housing (3), a coolant sump (4), a coolant pump (5) for pumping coolant (6) from the coolant sump (4), a heat exchanger (7) for cooling coolant (6) from the coolant pump (5), and a coolant line system (8) including a coolant reservoir (9) having a single coolant inlet (10) and multiple coolant outlets (11.1, 11.2, 11.3, 11.4, 11.5). The coolant line system (8) fluidically connects the coolant pump (5) to the heat exchanger (7), and the heat exchanger (7) to the single coolant inlet (10) of the coolant reservoir (9). The coolant reservoir (9) receives coolant (6) from the heat exchanger (7) via the single coolant inlet (10) and directs coolant (6) via the multiple coolant outlets (11.1, 11.2, 11.3, 11.4, 11.5) onto components in the housing (3) requiring cooling and lubrication.

A transmission mechanism device of an aspect of the present invention includes a motor, a transmission mechanism including a plurality of gears, a first shaft and a bearing supporting the first shaft and transmitting power of the motor, a housing that accommodates the transmission mechanism and holds the bearing on an inner face, oil that collects in a lower region inside the housing, a catch tank that is disposed inside the housing and opens upward, an oil passage through which the oil passes, and an oil pump provided in the oil passage. The oil passage has a first path connecting the oil pump and the catch tank and a scooping path for scooping the oil by rotation of the gear to guide the scooped oil to the catch tank. The catch tank includes a feed portion for supplying the oil to the gear or the bearing.

Methods and systems are provided for a vehicle system. In one example, the vehicle system includes a first electric drive axle assembly and a second electric drive axle assembly. Each of the first and second axle assemblies has a gear train with a planetary gear set axially offset from a motor-generator. Each planetary gear set is rotationally coupled to a differential.

An all-wheel-drive electric vehicle includes one or more front electric motors, one or more rear electric motors, an accelerator sensor, a vehicle speed sensor, and a control unit. The one or more front electric motors are configured to directly drive front wheels. The one or more rear electric motors are configured to directly drive rear wheels. The accelerator sensor is configured to determine an operation amount of an accelerator. The vehicle speed sensor is configured to determine vehicle speed. The control unit is configured to control drive of the one or more front and rear electric motors based on the operation amount of the accelerator and the vehicle speed. The control unit is configured to change an allocation of driving force between the one or more front electric motors and the one or more rear electric motors with a bias toward the rear wheels in a case where the operation amount of the accelerator is increased at or above a predetermined rate in a state in which the vehicle speed is higher than or equal to a predetermined speed.

A drive device for driving wheels of a motor vehicle includes a housing, an electric machine with a stator and rotor, a first output shaft for driving a first wheel, and a second output shaft for driving a second wheel. Via a differential transmission, first and second planetary gearsets are drivable by the rotor. First and second differential shafts transfer drive power from the differential transmission to the first and second planetary gearsets. The first differential shaft is mounted rotatably on an input shaft via bearings and the rotor is connected non-rotationally to the input shaft. A stable and non-buckling bearing of the second differential shaft in relation to the rotor is carried out via further bearings arranged on the second differential shaft or in the first differential shaft. The further bearings are arranged spaced apart from one another at least at a distance of twice an average bearing diameter.