The present disclosure relates to hub apparatuses and associated systems. An embodiment of the hub apparatus includes a rotor assembly, a shaft, and a stator assembly. The rotor assembly includes first/second housing components and multiple magnets mounted on one or both of the first and second housing components. The stator assembly includes (1) a coil assembly positioned corresponding to the magnets; (2) a main circuit board fixedly coupled to the coil assembly; and (3) a battery assembly positioned inside the coil assembly and carried by the main circuit board.

When a rotor performs an ordinary rotation operation, an axial position of the rotor is retained such that the rotor is rotatable with respect to a stator. When a parking brake switch is operated while a vehicle is at stoppage, a rotor slider slides the rotor in an axial direction against a preload of an axially preloading part. This brings an engaging portion of the rotor into engagement with an engaged potion of a housing. The reverse input holder retains the rotation angle of the rotor during the engagement due to the fact that the engagement between the engaging portion and the engaged potion is maintained against a reverse input load acting on the rotor as an external force that accompanies a reaction force of a pressing force of a brake friction member.

When a rotor performs an ordinary rotation operation, an axial position of the rotor is retained such that the rotor is rotatable with respect to a stator. When a parking brake switch is operated while a vehicle is at stoppage, a rotor slider slides the rotor in an axial direction against a preload of an axially preloading part. This brings an engaging portion of the rotor into engagement with an engaged potion of a housing. The reverse input holder retains the rotation angle of the rotor during the engagement due to the fact that the engagement between the engaging portion and the engaged potion is maintained against a reverse input load acting on the rotor as an external force that accompanies a reaction force of a pressing force of a brake friction member.

A self-locking arrangement for a motor and a linear actuator which relates to motors. The motor has a self-locking capability, a good stability, a low noisy during operation, and a good user experience. The self-locking arrangement includes an end cap mounted on the motor and a friction ring sleeved over a drive shaft of the motor, a notch being provided on the friction ring, a limiting portion being provided at an outer periphery of the friction ring, the end cap being fitted with the limiting portion, so that the friction ring clasps the drive shaft in a case where the drive shaft rotates along a first direction.

A self-locking arrangement for a motor and a linear actuator which relates to motors. The motor has a self-locking capability, a good stability, a low noisy during operation, and a good user experience. The self-locking arrangement includes an end cap mounted on the motor and a friction ring sleeved over a drive shaft of the motor, a notch being provided on the friction ring, a limiting portion being provided at an outer periphery of the friction ring, the end cap being fitted with the limiting portion, so that the friction ring clasps the drive shaft in a case where the drive shaft rotates along a first direction.

Described herein are eddy current brakes and associated methods of their use, particularly configurations that have a kinematic relationship with at least two rotational degrees of freedom used to tune operation of the brake or apparatus in which the brake is located.

Described herein are eddy current brakes and associated methods of their use, particularly configurations that have a kinematic relationship with at least two rotational degrees of freedom used to tune operation of the brake or apparatus in which the brake is located.

Disclosed is a device with a stator and a rotor, the device comprising: a stator; a rotor, wherein an air gap is provided between the rotor and the stator; and an air gap protection device fixedly connected to the stator, wherein the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor, and the air gap protection device rotates relative to the rotor when in contact with the rotor. By arranging the air gap protection device fixedly connected to the stator, the air gap protection device can rotate relative to the rotor when in contact with the rotor, and the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor.

Disclosed is a device with a stator and a rotor, the device comprising: a stator; a rotor, wherein an air gap is provided between the rotor and the stator; and an air gap protection device fixedly connected to the stator, wherein the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor, and the air gap protection device rotates relative to the rotor when in contact with the rotor. By arranging the air gap protection device fixedly connected to the stator, the air gap protection device can rotate relative to the rotor when in contact with the rotor, and the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor.

An electric motor assembly includes a rotor assembly includes a magnet coupled to a rotatable member and a stator assembly including a conductor winding configured to be actuated to cause the rotor to rotate based on an amount of magnetic flux in the rotor assembly. The assembly also includes a controllable magnetic device coupled to the rotatable member and configured to rotate with the rotatable member and a controller assembly configured to apply electric current to the controllable magnetic device to adjust the magnetic flux in the rotor assembly.