A motor driving assembly includes a single phase motor and a torque transmission mechanism. The torque transmission mechanism includes a driving member being driven by the motor, a driven member for driving a load to rotate along a predetermined direction, and a connecting device comprising a resilient member and a damping member. The resilient member includes one end connected to the driving member and the other end connected to the driven member. The damping member is coated on or attached over the resilient member, or filled in a gap of the resilient member, or the resilient member is made from a damping material in order to reduce noise produced by the resilient member.

A torsional vibration damper is provided that is capable of increasing torsional rigidity without increasing a size of an elastic member in a radial direction. A torsional vibration damper includes a boss member and a disk plate provided coaxially with each other; an elastic member being elastically deformable in a rotation direction of the boss member; a cam member rotating integrally with the boss member; a torque transmission member transmitting rotation torque between the boss member and the disk plate; and a socket member provided between the torque transmission member and the elastic member and having a contact surface coming in contact with the torque transmission member. The torque transmission member is capable of entirely reciprocating in a radial direction of the boss member in accordance with rotation of the cam member, and elastically compresses the elastic member when it moves outward in the radial direction of the boss member.

A rotary damper includes a damper motor and a damper housing in surrounding relationship to the damper motor. The damper housing has a connection piece for mounting the damper housing to a first mass. An articulated lever is swingably mounted in relation to the damper housing and connected to a second mass. The articulated lever has a lobe which is movable during a swinging motion of the articulated lever in relation to the damper housing along a movement path between two stops which are connected to the damper housing. A gear mechanism transmits and/or converts a relative rotational movement between the first and second masses to the damper motor for vibration damping.