Force adjusting braking device for an elevator system
AssigneeTK Elevator Innovation and Operations GmbH
InventorMarkan Lovric
Life of this patent
Estimating the term…
Abstract
A braking device may be utilized by an elevator system that has a cabin that is movable within an elevator shaft. The braking device may comprise an actuator and a brake. The actuator may be configured to provide an actuating force for the brake as needed. The braking device may include a force measuring assembly for generating a load state value of the cabin. The force measuring assembly may be mechanically coupled to the actuator such that the actuating force is dependent on the load state value. The actuator may be configured such that the greater the load state value the greater the actuating force.
Claims20
A braking device for an elevator system having a cabin that is movable inside an elevator shaft, the braking device comprising:
- a brake configured to be brought into engagement with a guide rail of the elevator system to brake the cabin relative to the guide rail;
- an actuator having disposed therein a first piston connected to the brake, a second piston, and a spring disposed between and in contact at opposing ends with each of the first and second pistons, which spring is configured to be preloaded and to apply an actuating force to the first piston to drive the brake into braking engagement with the guide rail;
- and
- a force measuring assembly mechanically coupled to the second piston of the actuator, the force measuring assembly being configured to generate a load state value corresponding to a force load state of the cabin, and to displace the second piston relative to the first piston in order to adjust both of the amount of preload in the spring and the amount of actuating force to be applied from the spring through the first piston to the brake, depending on the load state value.
An elevator system comprising:
- a cabin that is movable along a guide rail inside an elevator shaft;
- and
- a braking device comprising,
- a brake configured to be brought into engagement with the guide rail to brake the elevator cabin relative to the guide rail,
- an actuator having disposed therein a first piston connected to the brake, a second piston, and a spring disposed between and in contact at opposing ends with each of the first and second pistons, which spring is configured to be preloaded and to apply an actuating force to the first piston to drive the brake into braking engagement with the guide rail, and
- a force measuring assembly mechanically coupled to the second piston of the actuator, the force measuring assembly being configured to generate a load state value corresponding to a force load state of the cabin, and to displace the second piston relative to the first piston in order to adjust both of the amount of preload in the spring and the amount of actuating force to be applied from the spring through the first piston to the brake, depending on the load state value.
Dependencies are inferred from the claim text.