Safety brake system
AssigneeOtis Elevator Company
InventorJose Miguel Aguado-Martin
Life of this patent
Estimating the term…
Abstract
A safety brake system for use in a conveyance system. The safety brake system includes a guide rail and a conveyance component moveable along the guide rail. The safety brake system includes: a safety brake moveable between a non-braking position where the safety brake is not in engagement with the guide rail and a braking position where the safety brake is engaged with the guide rail; a linkage mechanism; and an actuator for the safety brake. The actuator is configured to be mounted to the conveyance component. The actuator includes an electromagnet switchable between a first state and a second state; and an actuation component configured to move relative to the electromagnet from a first position when the electromagnet is in the first state to a second position when the electromagnet is in the second state.
Claims17
A safety brake system (40;
- 140;
- 240;
- 440;
- 540) for use in a conveyance system including a guide rail (20) and a conveyance component moveable along the guide rail, the safety brake system comprising:
- a safety brake (46;
- 146;
- 246;
- 346;
- 446;
- 546) moveable between a non-braking position where the safety brake is not in engagement with the guide rail and a braking position where the safety brake is engaged with the guide rail;
- a linkage mechanism (54;
- 54c;
- 154;
- 254;
- 354;
- 454;
- 554);
- and
- an actuator (52;
- 152;
- 252;
- 352;
- 452;
- 552) for the safety brake, the actuator being configured to be mounted to the conveyance component and comprising:
- an electromagnet (56;
- 156;
- 256;
- 356;
- 456;
- 556) switchable between a first state and a second state;
- and
- an actuation component (58;
- 158;
- 258;
- 358;
- 458;
- 558) configured to move relative to the electromagnet from a first position when the electromagnet is in the first state to a second position when the electromagnet is in the second state,
- wherein the linkage mechanism is coupled between the safety brake and the actuation component such that movement of the actuation component from the first position to the second position when the electromagnet is switched from the first state to the second state is transferred to the safety brake via the linkage mechanism, thus moving the safety brake into the braking position;
- wherein the actuator (52;
- 152;
- 352;
- 452;
- 552) further comprises a biasing member (62;
- 162;
- 362;
- 462;
- 562) configured to bias the actuation component (58;
- 158;
- 358;
- 458;
- 558) away from or towards the electromagnet (56;
- 156;
- 356;
- 456;
- 556);
- wherein the biasing member is positioned between the electromagnet and the actuation component.
A method of operating a safety brake in a safety brake system, the safety brake system (40;
- 140;
- 240;
- 440;
- 540) comprising:
- a safety brake (46;
- 146;
- 246;
- 346 446;
- 546) moveable between a non-braking position where the safety brake is not in engagement with a guide rail and a braking position where the safety brake is engaged with the guide rail;
- a linkage mechanism (54;
- 54c 154;
- 254;
- 354;
- 454;
- 554);
- and
- an actuator (52;
- 152;
- 252;
- 352;
- 452;
- 552) for the safety brake, the actuator being mounted to the conveyance component and comprising:
- an electromagnet (56;
- 156;
- 256;
- 356;
- 456;
- 556) switchable between a first state and a second state;
- and
- an actuation component (58;
- 158;
- 258;
- 358;
- 458;
- 558) configured to move relative to the electromagnet between a first position when the electromagnet is in the first state and a second position when the electromagnet is in the second state;
- wherein the actuator further comprises a biasing member (62;
- 162;
- 362;
- 462;
- 562) configured to bias the actuation component away from or towards the electromagnet;
- wherein the biasing member is positioned between the electromagnet and the actuation component, the method comprising:
- operating the electromagnet in an emergency stop mode to move the actuation component from the first position to the second position, wherein the linkage mechanism is coupled between the safety brake and the actuation component such that the movement of the actuation component from the first position to the second position is transferred to the safety brake via the linkage mechanism, thus moving the safety brake into the braking position.
Dependencies are inferred from the claim text.