BRAKE ACTUATOR Operation principle 

Opening of brake callipers:
To open the brake callipers, 24V DC power will be supplied to the internal electrical motor. The rotating motor shaft is connected to the ball screw, which translates the rotating energy into a linear movement, thereby winding up a preloaded spring package and retracting the piston. Once the desired piston stroke length is reached,  the motor will shut off and a small holding brake will retain  the spring loaded stored energy.

Closing of brake callipers:
By interrupting the power supply to the holding brake the spring loaded energy will be gradually released by winding down the ball screw and extending the piston. No electrical energy is required during the brake operation. The actuator  hereby provides a fail safe and jerk-free brake function. The second function of the brake in a power failure or shut down situation performs as a vehicle holding brake .

braking unit details


A built-in force measurement system tracks the force exerted over the thrust-tension piston onto the brake shoe and allowing a gradual, quasi continuous soft braking.
The brake control mechanism and our patented brake force electronic control system manages the brake force sensitivity level and compensates for brake shoe wear and tear.

braking unit schematics