A vehicle drive device with a variable transmission includes a first driving module that provides a driving force, a second driving module that controls a transmission ratio, and a reduction gear part comprising a first sun gear, a second sun gear, and a planetary gear provided inside the second driving module. An output part is connected to one of the first sun gear, the second sun gear, and the planetary gear, and the first driving module is connected to another one of the first sun gear, the second sun gear, and the planetary gear that is not connected to the output part.

A planet carrier ring sun gear assembly for a transmission device with at least two planetary gears of a wheel hub drive for a vehicle is described. The planet carrier ring sun gear assembly may include a planet carrier ring of a first planetary gear. The planet carrier ring may be configured to support a plurality of planet gear wheels of the first planetary gear and a sun gear of a second planetary gear. The planet carrier ring and the sun gear may form a monolithic unit.

A stator ring-internal gear assembly for a transmission device comprising a planetary gear of a wheel hub drive for a vehicle, the assembly may include a stator ring of an electrically operable electric motor device of the wheel hub drive for providing a motor torque and an internal gear of the transmission device for translating the provided motor torque into a net torque. The stator ring and the internal gear may be directly fixed to one another by positive connection in a non-rotatable and tension-resistant manner. The stator ring and the internal gear may form a mono-lithic unit.

A planet carrier ring-freewheel assembly for a transmission device including a planetary gear for a wheel hub drive for a vehicle is disclosed. The assembly includes a freewheel inner ring and/or a freewheel outer ring of a freewheel device for transmitting, dependent on a direction of rotation, a net torque provided by a drive unit of the wheel hub drive to a hub housing of the wheel hub drive, and a planet carrier ring of the planetary gear structured for supporting planet gear wheels. The planet carrier ring and the freewheel inner ring and/or the free wheel outer ring are directly fixed to one another by a positive connection in a non-rotatable and tension-resistant manner.

Embodiments of the disclosed gear transmission comprise an input shaft and a coaxial output shaft, a planetary gear assembly configured with a sun gear fixedly articulated to the input shaft, a ring gear of the planetary gear assembly fixed at a hub of a transmission plate configured with a peripheral gear ring, a gear ratio changing mechanism comprising a pinion gear engaged with the peripheral gear ring of the transmission plate and rotatable about a radial axis, and a transmission pinion gear coupled to an axle rotatably articulated with the pinion gear. The transmission pinion gear being displaceable along the axle and configured for engaging with a rotatable gear plate. The gear plate is coaxially articulated with the output shaft and the gear plate is configured at an inside face thereof with a plurality of coaxially disposed gear rings. The transmission pinion gear is engageable with a gear ring of the gear plate, and the gear ratio changing mechanism comprises a manipulator configured for selective radial displacing the transmission pinion gear between gear rings of the gear plate. The axle is configured to rotate about its longitudinal axis and simultaneously rotate about a central axis of the input shaft in a direction opposed to the direction of rotation of the transmission plate.

A transmission system, such as for a two wheeled bicycle, including an axle assembly including a set of sprockets, a transmission unit having an input coupled to the set of sprockets and an output arranged to be coupled to a wheel. The transmission unit includes a transmission operable according to a first transmission ratio and a second transmission ratio, a clutch or brake system for switching from the first to the second transmission ratio under load, and a first actuator for controlling the clutch or brake for coupling or decoupling. The transmission system including a second actuator for selecting one of the sprockets for transmission of torque to the axle assembly, and a controller configured to receive a first shift signal and/or a second shift signal, and configured to control the first actuator and/or the second actuator in response to the first or second shift signal.

A transmission system, such as for a two wheeled bicycle, including an axle assembly including a set of sprockets, a transmission unit having an input coupled to the set of sprockets and an output arranged to be coupled to a wheel. The transmission unit includes a transmission operable according to a first transmission ratio and a second transmission ratio, a clutch or brake system for switching from the first to the second transmission ratio under load, and a first actuator for controlling the clutch or brake for coupling or decoupling. The transmission system including a second actuator for selecting one of the sprockets for transmission of torque to the axle assembly, and a controller configured to receive a first shift signal and/or a second shift signal, and configured to control the first actuator and/or the second actuator in response to the first or second shift signal.

Various hub motor arrangements, systems, and methods are disclosed. The hub motor arrangement may include a transmission assembly to provide increased torque. The transmission assembly may include a motor gear, a planetary gear, an idler gear, and a ring gear. The idler gear may be positioned farther away from an axis of rotation of the hub motor arrangement compared to the planetary gear. The motor gear may drive the planetary gear, the planetary gear may drive the idler gear, and idler gear may drive the ring gear. The rotation of the ring gear may rotate a housing of the hub motor arrangement to propel a vehicle incorporating the hub motor arrangement.

A ride-on vehicle, such as for a child, includes a vehicle body and one or more wheels that support the vehicle body relative to a surface. At least one of the wheels includes a hub motor arrangement that provides a drive torque for propelling the vehicle. The hub motor arrangement includes a housing defining an interior space. An axle or other mounting element(s) define an axis of rotation of the housing. Preferably, the axle or other mounting element(s) do not pass completely through the housing. A motor drives the housing through a transmission. Preferably, the motor is a standard, compact motor that is positioned on the axis of rotation and can be laterally offset from a central plane of the housing. In some embodiments, a traction element is carried directly by the housing.

A ride-on vehicle, such as for a child, includes a vehicle body and one or more wheels that support the vehicle body relative to a surface. At least one of the wheels includes a hub motor arrangement that provides a drive torque for propelling the vehicle. The hub motor arrangement includes a housing defining an interior space. An axle or other mounting element(s) define an axis of rotation of the housing. Preferably, the axle or other mounting element(s) do not pass completely through the housing. A motor drives the housing through a transmission. Preferably, the motor is a standard, compact motor that is positioned on the axis of rotation and can be laterally offset from a central plane of the housing. In some embodiments, a traction element is carried directly by the housing.