Patent ID: 8448540

Claim:
A self-locking linear actuator assembling mechanism for assembling and fixing an actuator transmission mechanism, comprising: a gearbox having a substantially column-shaped box body, the box body being fixedly connected with a motor of a transmission mechanism with an axis of the box body normal to an output shaft of the motor, the box body being composed of two half pieces mated with each other, the mating faces of the two half pieces being parallel to an axial direction of the box body, a connection room axially inward extending from an end face of a first axial end of the box body, a locating room axially inward extending from an end face of a second axial end of the box body by a predetermined depth, a peripheral wall of the locating room having a regular polygonal cross-section normal to the axial direction of the box body; a rear retainer seat, which is an integrally formed one-piece component, the rear retainer seat having a seat body with a predetermined shape, a first end of the seat body being inserted in the locating room, the first end of the seat body having a locating peripheral face with regular polygonal shape for attaching to and contacting with the regular polygonal peripheral wall of the locating room, the number of the sides of the regular polygonal shape of the locating peripheral face being equal to the number of the sides of the regular polygonal peripheral wall of the locating room, an end face of the first end of the seat body being recessed to form a bearing socket for receiving therein a bearing of a threaded rod of the transmission mechanism; a casing, which is a hollow body composed of two half casings, which are mated with each other to accommodate therein the transmission mechanism, the gearbox and a part of the rear retainer seat, the mating faces of the two half casings being parallel to an axis of the output shaft of the motor; an outer tube with a predetermined length, an axial end of the outer tube being inserted in the connection room; and an insertion section including engaging bosses and engaging holes complementary to the engaging bosses, the engaging bosses and the engaging holes being respectively disposed on inner face of a wall of the connection room and the axial end of the outer tube, whereby the engaging bosses can be inserted in the engaging holes to fixedly connect the outer tube with the box body.