Abstract: A clutch mechanism with overload protection provided between a power input shaft and a power output shaft of an actuator includes a magnet set including at least a first magnet and a second magnet that are arranged as magnetically attractive to each other and are attached to the power input shaft and the power output shaft, respectively; and a friction assembly including a first friction member and a second friction member arranged adjacent to each other and between the first magnet and the second magnet, so as to provide a constant friction between the magnets. The magnet set and the friction assembly jointly set a limit of a torque between the power input shaft and the power output shaft. When the torque exceeds the limit, the power input shaft and the power output shaft are disconnected, so as to achieve overload protection.

Abstract: A clutch mechanism with overload protection provided between a power input shaft and a power output shaft of an actuator includes a magnet set including at least a first magnet and a second magnet that are arranged as magnetically attractive to each other and are attached to the power input shaft and the power output shaft, respectively; and a friction assembly including a first friction member and a second friction member arranged adjacent to each other and between the first magnet and the second magnet, so as to provide a constant friction between the magnets. The magnet set and the friction assembly jointly set a limit of a torque between the power input shaft and the power output shaft. When the torque exceeds the limit, the power input shaft and the power output shaft are disconnected, so as to achieve overload protection.

Abstract: An actuator having a load weighting mechanism is disclosed. The actuator has a screw and a nut mounted around the screw and connected with a driving shaft. The driving shaft supports a load. When moving along the screw, the nut displaces the driving shaft forward and backward. The screw has a pair of thrust bearings for bearing the load, and at least one load weighting unit installed between the pair of thrust bearings for weighting the load.