Provided is an actuator including: a motor; a brake; a motor casing that accommodates a constituent member of the motor; and a brake casing that accommodates a constituent member of the brake. The motor casing and the brake casing are connected to each other, the brake includes a stator having a coil and a coil case, and a friction plate, a minimum outer diameter of the coil case is 70 mm or less, and a value obtained by dividing a distance from a first end surface of the friction plate on a side farthest in an axial direction from the coil case to a second end surface of the coil case on a side opposite to the first end surface by the minimum outer diameter is 0.2 or less.

A drive for a transport device, such as a conveyor belt, the drive including an external rotor motor having a stator and a rotor, and a gear unit having a shaft and an input drive gear. A set of drives in which external rotor motors of different sizes, including stators of identical diameter and different heights with corresponding rotors, and/or gear units having different speed-increasing stages or speed-reducing stages, are provided. Also, a method for driving a transport device using the drive.

An electrical machine has a braking element and a release device. A rotor of the electrical machine includes the braking element and release device. The electrical machine is located, for example, in a rail vehicle. In order to brake the rotor of the electrical machine in the event of an error in the drive train, an overload torque is generated by the electrical machine. An overload clutch is triggered by the overload torque.

A motor assembly having a brake device and a downsized cooling system is provided. The motor assembly comprises a drive motor, a brake device that stops rotation of a motor shaft, and a casing that holds the drive motor and the brake device. The motor assembly further comprises a hollow passage formed in the motor shaft to allow cooling medium to flow therethrough, a centrifugal passage formed in the brake rotor from the hollow passage to an opening of the brake rotor, and a return passage that returns the cooling medium discharged from the opening to the hollow passage.

Provided is an actuator including: a motor; a brake; a motor casing that accommodates a constituent member of the motor; and a brake casing that accommodates a constituent member of the brake. The motor casing and the brake casing are connected to each other, the brake includes a stator having a coil and a coil case, and a friction plate, a minimum outer diameter of the coil case is 70 mm or less, and a value obtained by dividing a distance from a first end surface of the friction plate on a side farthest in an axial direction from the coil case to a second end surface of the coil case on a side opposite to the first end surface by the minimum outer diameter is 0.2 or less.

A two-speed transmission system integrated with an inner rotor hub motor, including an inner rotor hub motor, a steering knuckle, a fastening screw, a first transmission casing, a second transmission casing, a screw, a first planetary gear train, a second planetary gear train, a first electromagnetic brake, a second electromagnetic brake, a tire, a wheel rim, a rim bolt, a rim nut, a wheel hub, a shaft end bolt, a brake disc and a brake caliper. This invention also provides an electric vehicle, which balances the requirements for dynamics performance and driving economics and achieves better overall performances. The two-speed transmission system of this invention realizes gear shifting and long-term no-power parking braking.

An actuator module is provided. The actuator module includes a motor part including a drive shaft and a drive part configured to rotate the drive shaft, a reducer installed on one side of the drive part and configured to increase an output torque according to driving of the motor part, a brake installed on an opposite side of the drive part and configured to suppress rotation of the motor part, an encoder installed on one side of the brake and configured to sense an operation of the drive shaft, a controller installed on one side of the encoder and electrically connected to the motor part to control the motor part, and a first housing configured to surround the motor part, the reducer, the brake, the encoder and the controller. An airflow path through which an airflow can flow is formed to extend from the motor part.

A wheel assembly for a vehicle includes a wheel drive having a housing defining an internal volume, an annular rim ring circumferentially disposed about, extending radially through, and rotatable with respect to the housing, a hollow support cylinder extending along a rotational axis of the wheel assembly, and a motor disposed within the internal volume, the motor having a rotor anchored to the rim ring, and a stator disposed radially within the rotor and anchored to the hollow support cylinder, the stator directly abutting and radially supporting the rotor. The wheel assembly further includes a wheel having a rim and a disc, and a tire mounted on the rim. The disc of the wheel is secured to the rim ring such that the rotor, the rim ring, the wheel, and the tire are rotatable about the axis.

The electric linear motion actuator includes an electric motor, a linear motion mechanism configured to convert rotary motion of the electric motor to linear motion of a linear motion part via a rotation input-output shaft, and a housing holding the linear motion mechanism. The electric motor includes a stator and a rotor which are arranged such that the directions of magnetic poles that generate interlinkage flux contributing to a motor torque are parallel with a rotation axis of the electric motor. The stator is arranged so as to be coupled with an axial end surface of the housing. The rotor is arranged so as to have a space, in the axial direction, from the torque generating surface of the stator, and the rotor is fixed to the rotation input-output shaft of the linear motion mechanism.

A drive includes an electric motor with a brake assembly. The electric motor has a rotor rotatably mounted via a first bearing and a second bearing and has a housing part. The first bearing has an inner ring and an outer ring, and the inner ring is received on the rotor, e.g., placed thereover, e.g., is positioned against a step or pressed against a catch that is positioned against a step formed on the rotor. The brake assembly has a magnetic body, e.g., made of a ferromagnetic material. The outer ring is received in the magnetic body of the brake assembly, e.g., is positioned against a step.