Actuator, actuator assembly, motor controller, motor assembly and vehicle

The invention relates to the technical field of braking, and discloses an actuator, an actuator assembly, a motor controller, a motor assembly and a vehicle, the actuator comprises a shell, the shell defines a containing cavity, the first side wall of the shell is provided with a first opening, and the shell is further provided with a through hole; the moving part is arranged in the accommodating cavity; the reinforcing piece covers at least one part of the first side wall, and a second opening is formed in the reinforcing piece; at least part of the explosion device is arranged in the containing cavity, the explosion device is constructed to generate impact force after ignition so as to push the moving part to move and enable part of the moving part to stretch out of the shell through the through hole, and the explosion device comprises a fuse and an initiator. According to the actuator, at least one part of the first side wall is covered with the reinforcing piece, so that the structural strength of the first side wall is enhanced, the first side wall is not prone to being damaged, the possibility that the first side wall is damaged by impact force is reduced, and the possibility that the impact force affects external parts is reduced.