Aktiebolaget Skf

Enrico Di Stefano

Emmanuel Eyraud

Andreas Geyer

Leo Shen

Ciney Zhang

Alberto De Bernardi

A brake device for a linear actuator is provided having a torque transmission mechanism for forward transfer of driving torque and a spring friction mechanism for blocking backward transfer of load torque. The mechanism provides an input shaft and a first coupled claw connected to the input shaft that rotates synchronously therewith, a driving torque output shaft and a second coupled claw connected to the output shaft and capable rotating synchronously therewith. The first coupled claw and second coupled claw are matched and engaged together, and used to transfer driving torque in a forward direction from the input shaft to the output shaft. The spring friction mechanism provides a brake housing and a friction coil spring disposed elastically in a cylindrical inner hole of the brake housing. The friction coil spring formed with end parts at two axial ends for hooking onto the first and second coupled claws.

Brake device and linear actuator employing the brake device

An actuator includes a screw mechanism () having a threaded nut () rotatable by an electric motor () about a longitudinal axis (x) and a screw () translatable along the axis between an axially extended position and an axially retracted position. The screw () is connectable to a wire (W) of a Bowden cable (C) having an outer sheath (S). The actuator has a casing () with a first, fixed transversal surface (). A cup () is mounted axially slidably on the casing () and has a second transversal surface () adapted for resting against an end of the sheath (S). A spring () is compressed between the first, fixed transversal surface () and the sliding cup (). The cup () is capable of reaching an axially extended position, corresponding to a released brake condition, and an axially retracted position towards the first fixed transversal surface (), against the bias of the spring (), corresponding to a brake actuated condition.

Growing community of inventors

Rivoli, Italy

Enrico Di Stefano