A safety actuation assembly for an elevator system including a housing, a speed sensing device disposed within the housing, wherein the speed sensing device comprises a proximal end, and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position.

A brake assembly for an elevator system is provided and includes a guide rail configured to guide movement of an elevator car. Also included is a safety brake operatively coupled to the elevator car and having a brake surface configured to frictionally engage the guide rail. Further included is a safety brake actuation mechanism operatively coupled to the safety brake and configured to actuate the safety brake to a braking position. The mechanism includes a first sensing device disposed on a first side of the guide rail to detect a first condition reading of the elevator car relative to the guide rail. The mechanism also includes a second sensing device disposed on a second, opposite side of the guide rail to detect a second condition reading of the elevator car relative to the guide rail, the first and second condition readings collectively analyzed to determine an overall condition reading.

A brake assembly for an elevator system includes a guide rail configured to guide movement of an elevator car. Also included is a safety brake operatively coupled to the elevator car and having a brake surface configured to frictionally engage the guide rail. Further included is a safety brake actuation mechanism operatively coupled to the safety brake and configured to actuate the brake member to a braking position. The safety brake actuation mechanism includes a sensing device disposed at a distance from the guide rail to determine a speed of the elevator car relative to the guide rail. The safety brake actuation mechanism also includes a first rigid plate having an inner edge disposed at a distance from the guide rail that is less than the distance that the sensing device is spaced from the guide rail to prevent the sensing device from contacting debris disposed on the guide rail.

A braking unit (4) for a stairlift, wherein the stairlift comprises a guide rail (2) and a braking carriage (1) slidable on the guide rail (2), the braking carriage (1) comprising the braking unit (4). The braking unit (4) comprises: a safety device (5) which can be moved to a safe condition to engage with the guide rail (2) blocking a sliding of the braking carriage (1); a detection device (6) designed to detect a speed of the braking carriage (1), when the braking carriage (1) slides on the guide rail (2), and is configured to connect to the safety device (5) to cause the movement of the safety device (5) in the safe condition, if the speed of the braking carriage (1) exceeds a predetermined maximum speed. The safety device (5) comprises a safety rotor (501). The detection device (6) comprises: a friction rotor (601), rotating relative to the safety rotor (501) around a first axis of rotation (R1) by the sliding of the braking carriage (1); a variation mechanism (603) acting in conjunction with and coupled to the friction rotor (601) and is configured to connect in a rotationally integral matter the safety rotor (501) with the friction rotor (601) when the speed of the carriage (1) is greater than the predetermined speed. The safety rotor (501) is configured to be rotated around a second axis of rotation (R2), parallel to the first axis of rotation (R1) when the safety rotor (501) and the friction rotor (601) are connected in an integral manner, the safety device (5) also comprising a tapered element (506) fixed to the safety rotor (501) which is configured to be positioned between the friction rotor (601) and the guide rail (2) for locking the safety device (5) in the safe condition and stopping the sliding of the braking carriage (1).

A car mounted governor (12) for an elevator system includes an overspeed pulley (38) configured to be secured to an elevator car of an elevator system. The overspeed pulley is configured to detect an overspeed condition of the elevator car via a rate at which a governor cable (42) passes around the overspeed pulley. The car mounted governor further includes a free pulley (40) configured to be secured to the elevator car with the governor cable routed over the free pulley. A tensioning device (64) is located at the free pulley and is operably connected thereto to maintain a select tension on the governor cable.

An overspeed governor assembly for an elevator system, an elevator safety system, and an elevator system. The overspeed governor assembly comprises an overspeed governor, a linkage provided to enable the overspeed governor to associate with a safety device of the elevator, when an elevator car overspeed is occurring, to trigger the safety device to perform safety measures, and at least one torsion spring coupled between a sheave and a centrifugal mechanism in the overspeed governor for providing a pre-set load, and the centrifugal force formed by the centrifugal mechanism when the elevator car overspeed is occurring, is greater than the pre-set load, for triggering the safety device via the linkage.

A safety link for an elevator car traveling in an elevator hoistway includes a hitch bracket slidably mounted to the elevator car frame so as to be movable in the moving directions of the elevator car and biased toward the downward movement direction of the elevator car in normal operating condition, the hitch bracket connected to the governor rope, and a pulley rotatably mounted to the hitch bracket and including an actuation wire wrapped around the pulley and connected to a safety device.

The invention relates to an overspeed governor for a lifting gear comprising a sheave driven by a overspeed governor cable and a brake for braking the sheave, wherein the brake comprises at least one eccentric piece, mounted on the sheave in a pivoting manner, wherein the eccentric piece is mounted on a first centrifugal weight in a pivoting manner and mounted on a second centrifugal weight in a pivoting manner, wherein, in the event of a displacement of the first and second centrifugal weights due to centrifugal force, the first and the second centrifugal weights pivot the eccentric piece, the brake comprising a reset unit having a spring system which pulls the centrifugal weights in the direction of the undeflected position thereof, wherein the spring system has a first spring constant up to a switching speed, the spring system has a second spring constant from the electric switching speed of the sheave and the second spring constant is greater than the first spring constant.

A remote trigger apparatus includes: an actuator; and a pivoting member rotatable around an axis, wherein the actuator enables the pivoting member to rotate from an idle position to an operating position, in the idle position, the pivoting member keeps separate from a centrifugal mechanism of the governor component, in the operating position, the pivoting member is jointed to a contact part of the centrifugal mechanism of the governor component, and the pivoting member further rotates along with the centrifugal mechanism and radially pushes the contact part inward, so as to trigger the governor component. In the remote trigger apparatus according to an embodiment of the present invention, the pivoting member guides the centrifugal mechanism gradually and gently, thus avoiding direct impacts on the centrifugal mechanism of the governor component and problems caused by the direct impacts.

An overspeed protection switch, an overspeed governor assembly and an elevator system are provided by the present disclosure. The overspeed protection switch includes: a trigger device including a trigger member and at least one protrusion, wherein the trigger member is capable of rotating to a triggered position from an untriggered position when being toggled, and the at least one protrusion is connected to the trigger member and rotates together with the trigger member; an actuation device including an action end capable of performing a linear movement; and a reset member which is connected with the action end of the actuation device and is translated with the linear movement of the action end of the actuation device so as to push one of the at least one protrusion to drive the trigger member to return to the untriggered position from the triggered position.