Patent ID: 8714039
Filing Date: 2014-05-06
Classification: B65H,F16H,Y10T

Abstract:
1. A stroke-restricting device of a linear actuator, and the linear actuator comprising a base and a telescopic pipe, and the stroke-restricting device comprising: a box, fixed to the base, and the box having a wall plate, and a through hole formed on the wall plate; a movable member, including a rod passed through and coupled to the through hole, and capable of moving the box; a block, fixed to the rod; a pair of switches, fixed to the box and at positions corresponding to the block, and each of the switches having a trigger portion provided for contacting the block to generate an electrical signal, and the trigger portions being disposed at two opposite ends of a moving path of the block respectively; and a wire-reeling mechanism, installed at the telescopic pipe, and moved with the telescopic pipe, and the wire-reeling mechanism including a wire, and an end of the wire being coupled to the movable member; wherein, when the telescopic pipe is retracted inwardly to a limit position, the rod and the block are pushed and moved together, and the block will touch one of the trigger portions to stop retracting the telescopic pipe; and when the telescopic pipe is extended outwardly to a limit position, the wire pulls and moves the rod and the block together, and the block will touch the other trigger portion to stop moving the telescopic pipe.