Double braking mechanism for electric push rod

Abstract

A dual braking mechanism for an electric actuator is provided in a telescopic rod assembly and includes: a first braking mechanism, a second braking mechanism, a fixed bearing, a screw, a pin, and a helical spring. The screw drives the telescopic rod assembly to extend and retract, and has an axial direction and a radial direction perpendicular to the axial direction defined along its length. The screw has a braking section with a notch on its circumferential surface along the radial direction. The fixed bearing is sleeved on the braking section and has a through hole corresponding to the notch along the radial direction. The pin is inserted into the through hole and locked in place by the corresponding notch. The first and second braking mechanisms are both sleeved on the braking section and are symmetrically arranged on both sides of the fixed bearing to clamp the fixed bearing. The helical spring is sleeved on the fixed bearing and the first and second braking mechanisms. This design ensures that the screw will not break even under heavy loads.

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