A safety brake system (40; 240) for use in a conveyance system is provided. The safety brake system (40; 240) includes a guide rail (20) and a conveyance component moveable along the guide rail (20). The safety brake system (40; 240) comprises a safety brake (42; 242), a linkage mechanism (56; 256) and an actuator (44; 144; 244) for the safety brake (42; 242). The safety brake (42; 242) is moveable between a non-braking position where the safety brake (42; 242) is not in engagement with the guide rail (20) and a braking position where the safety brake (42; 242) is engaged with the guide rail (20). The actuator (44; 144; 244) is configured to be mounted to the conveyance component and positioned between first and second ferromagnetic components. The actuator comprises an array of magnetic components comprising a first magnetic component adjacent to and arranged between two second magnetic components. The first magnetic component comprises one of a permanent magnet and an electromagnet and the second magnetic components each comprise the other of a permanent magnet and a electromagnet. When the electromagnet (66; 166; 266) of the first or second magnetic components is switched from the first state to a second state, the magnetic field between the array and the first ferromagnetic component is reduced and the magnetic field between the array and the second ferromagnetic component is augmented so as to move the actuator (44; 144; 244) from the first position to a second position against the second ferromagnetic component. The linkage mechanism (56; 256) is coupled between the safety brake (42; 242) and the actuator (44; 144; 244) such that movement of the actuator (44; 144; 244) from the first position to the second position when the electromagnet is switched from the first state to the second state causes the safety brake (42; 242) to move into the braking position. Wherein, in the second state, the electromagnet of the first or second magnetic component is energised with a first polarity and, in the first state, the electromagnet of the first or second magnetic component is energised with a second, opposite polarity.
SAFETY BRAKE SYSTEM
SICHERHEITSBREMSSYSTEM
SYSTÈME DE FREINAGE DE SÉCURITÉ
23.04.2025
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |