LINEAR ACTUATOR WITH ARM DRIVEN MECHANISM

摘要

A linear actuator (1) includes an electrical driving mechanism (10), a lead screw (20), an outer tube (30), a telescopic tube (40) and an arm driven mechanism (50). The arm driven mechanism (50) comprises an arm (51), a driving nut (52), a telescopic sleeve (53), a first washer (54), a nut-tube (55) and a second washer (56). The arm (51) is provided with a handle (511) and a sleeve (512), and the sleeve (512) links with the lead screw (20). An outer peripheral of the telescopic sleeve (53) provided with a plural of screws for screwing with the telescopic tube (40). The nut-tube (55) links with the driving nut (52) for moving together. When the handle (511) rotates, the linear actuator (1) can be operated.

主权项

1. A linear actuator with arm driven mechanism (50), the linear actuator (1) having a lead screw (20) and a telescopic tube (40), the arm driven mechanism (50) comprising:
an arm (51) provided with a handle (511) and a sleeve (512) connecting with the handle (511), the sleeve (512) linking with the lead screw (20); a driving nut (52) screwed with the lead screw (20) for transmission; a telescopic sleeve (53) sleeved on an outer of the driving nut (52), an outer peripheral of the telescopic sleeve (53) provided with a plural of screws for screwing with the telescopic tube (40); a first washer (54) sandwiched between the driving nut (52) and the telescopic sleeve (53); a nut-tube (55) inserted between the driving nut (52) and the telescopic sleeve (53) linking with the driving nut (52); and a second washer (56) sandwiched between the telescopic sleeve (53) and the nut-tube (55); wherein when the lead screw (20) rotates, the driving nut (52) and the nut-tube (55) linearly moves together with telescopic sleeve (53) through the first washer (54) and the second washer (56); when the driving nut (52) or the nut-tube (55) is blocked and stopped, the driving nut (52) and the nut-tube (55) rotates with relative to the lead screw (20), and the telescopic sleeve (53) slips between the first washer (54) and the second washer (56) to make the telescopic sleeve (53) idling with respect to the driving nut (52) and the nut-tube (55).