A magnetic levitation power device is revealed. The magnetic levitation power device includes at least two sets of power devices, a motor, and a power generator. The magnetic levitation power device features on the power devices each of which consists of a first seat, a second seat and a transmission set. A first sleeve is set on the first seat and a second sleeve is arranged at the second seat. The transmission set is composed of a shaft, a large gear and a small gear. Each of two ends of the shaft are disposed with two magnetic bodies respectively and are mounted in a sleeve. The magnetic bodies are arranged with like poles repel each other so that the transmission set is suspended and friction coefficient of the shaft is reduced. Therefore high speed transmission is achieved by low power to get high power.

A transmission includes a first shaft and a second shaft. The first shaft is made of a first metal material. The first shaft has a hollow structure. The second shaft is made of a second metal material different from the first metal material. The second shaft is fitted into the hollow structure of the first shaft at an axial overlap section. The first shaft and the second shaft are coaxially connected at the axial overlap section with friction stir welding.

A drive system for a self-propelled harvesting machine includes a drive engine designed as an internal combustion engine, a first driven pulley driven by the drive engine that at least one drive pulley of a working mechanism via a drive belt. The drive system also includes at least one first and one second hydraulic unit. The drive belt is drivably connected to a pulley that is enclosed in sections by housing elements. The housing elements are disposed opposite one another and are fixed relative to the pulley. The first hydraulic unit and the second hydraulic unit are disposed on the housing elements and, the first hydraulic unit and the second hydraulic unit are drivably connected to a shaft that extends through the pulley.

A power train for a motor vehicle includes at least one electric drive device, a first shaft which can be rotated relative to a housing element, and a second shaft which can be rotated relative to the housing element and which is designed as a hollow shaft at least in some regions. At least one longitudinal region of the first shaft is received in said hollow shaft in a rotatable manner relative to the second shaft. A first vehicle wheel can be driven by way of the electric drive device via the first shaft, and a second vehicle wheel can be driven by way of the electric drive device via the second shaft. An axial bearing is provided which rests against the first and second shaft and via which the shafts are supported against each other in the respective axial direction thereof in a rotatable manner relative to each other.

The brake assembly includes a housing, a rotor disc. The rotor disc includes at least one internal cavity. The at least one internal cavity includes a pawl and a thermal fuse. In use, the thermal fuse is configured to maintain the position of the pawl in the at least one internal cavity when a temperature is below a predetermined threshold, and wherein the thermal fuse is configured to melt when a predetermined threshold of temperature is reached during braking to release the pawl out of the at least one internal cavity towards the housing. The housing includes at least one recess configured to receive the pawl.

The transmission system, including a drive shaft, a driven shaft and a connecting device enabling the drive shaft to transmit mechanical torque to the driven shaft, and guide devices guiding the drive shaft in rotation about a drive axis and guiding the driven shaft in rotation about a driven axis. When the transmission system is at a standstill, the drive axis and the driven axis are misaligned, and they move closer to one another when the transmission system transmits torque from the drive shaft to the driven shaft.

A transmission mechanism for a rotary joint, a robot joint and a robot. The transmission mechanism includes a driving member, a transmission member, an output shaft, an input shaft, and a housing. The driving member has a driving end. The transmission member has an output end and an input end. The output shaft is drivingly connected to the output end. The input shaft is drivingly connected to both the driving end and the input end, and sleeved on the output shaft. The housing is arranged around the input shaft. The housing, the input shaft and the output shaft are in a triple nested structure. The implementation of the present disclosure can compress a total length of the joint, save axial space, and make full use of radial space, while satisfying good assembly coaxiality.

A motor shaft is for an electric motor of an electric bicycle. The motor shaft has a toothing for transmitting motor torque. The toothing is produced via a forming process. An electric motor includes a motor shaft. A drive device of an electric bicycle includes the electric motor having the motor shaft.

A drive unit (10) for a vehicle including an electric machine (12) having a rotor shaft (14) and a transmission (16) with a transmission shaft (18). The transmission shaft (18) is rotatably mounted in a first housing section (22) with a first rolling bearing (20) and the rotor shaft (14) is rotatably mounted in a second housing section (26) with a rolling second bearing (24). The transmission shaft (18) and the rotor shaft (14) are coupled to one another in a rotationally fixed manner. A third rolling bearing (28), which has an inner bearing ring (30), is arranged at the transition between the transmission shaft (18) and the rotor shaft (14), The inner bearing ring (30) is in contact with the rotor shaft (14) and the transmission shaft (18) with its inner surface (32).