Otis

An elevator machine (5) for driving an elevator car (6) in an elevator system (2) comprises a shaft (12) that extends along an axial direction (A) and includes a sheave portion (26) for coupling the shaft (12) to at least one tension member (3), in particular to at least one belt, that is coupled to the elevator car (6). The elevator machine (5) further comprises a motor (9) that is configured for rotationally driving the shaft (12) and a brake (20) for braking rotation of the shaft (12). The motor (9), the brake (20) and the sheave portion (26) are arranged along the axial direction (A) such that the brake (20) is arranged between the motor (9) and the sheave portion (26).

The present disclosure provides a coupling device, an elevator door operator system, an elevator system, and an adjustment method. The coupling device is intended for an elevator door operator system, wherein the coupling device comprises a base plate configured with a connection portion for connecting to a door coupler assembly of the elevator door operator system; and a belt hitch assembly movably arranged on the base plate and configured to clamp a belt of the elevator door operator system; wherein the coupling device comprises: a working state, in which the coupling device is driven by the belt to actuate the door coupler assembly; and an adjustment state, in which the belt hitch assembly moves relative to the base plate to adjust a length of the belt. The coupling device according to the embodiments of the present disclosure establishes driving transmission between the belt and the door coupler assembly in a compact manner, while also enabling adjustment of the belt length when required.

An elevator system includes a motor configured to drive a traction sheave, the motor including motor windings; a brake configured to slow or stop rotation of the motor, the brake including a brake coil; a reverse bias diode connected in parallel with the brake coil through a latching relay; an external braking circuit connected to the motor windings through a brake contact; a controller configured to control the latching relay and the brake contact to control deceleration of an elevator car.

A tension device for an elevator car, an elevator car, and an elevator system are disclosed. The elevator car has a first side portion and a second side portion opposite to each other and a rear side portion opposite to a car door, and an elevator counterweight is arranged on a side close to the first side portion, wherein the tension device comprises a tension member, and a first end and a second end of the tension member are fixed to a first position and a second position on the elevator car respectively, to provide a first tensile force acting on the elevator car, and the first tensile force is substantially parallel to a longitudinal direction of the elevator car at the top of the elevator car and directed towards the rear side portion. The solutions of the disclosure can effectively solve the problem of an elevator car leaning forward towards a landing door in an elevator system with side-mounted counterweight, thereby enhancing the safety performance of the system, saving space and improving the smoothness of elevator car operation.

An elevator car cargo system includes two opposing sidewalls extending from a car floor, and a stacking rack including two or more sets of horizontally-extending rails to define two or more horizontally-extending tiers and one or more vertically-extending columns in the elevator car for loading and unloading cargo. a method of operating an elevator system includes driving an elevator car along a hoistway. The elevator car includes two opposing sidewalls extending from a car floor and a stacking rack including two or more sets of horizontally-extending rails to define two or more horizontally-extending tiers and one or more vertically-extending columns in the elevator car for loading and unloading cargo. The elevator car is stopped at a landing floor of the hoistway, and cargo is selectably loaded onto and/or unloaded from the stacking rack.

A system includes at least one suspension member that facilitates movement of an elevator car within a hoistway and at least one connector that couples the at least one suspension member to a monitoring device. A chip is associated with at least one of the suspension member and the connector and includes identifier information associated with the at least one suspension member. The chip is configured to track and communicate a number of cycles of the at least one suspension member to the monitoring device.

A transportable elevator system (2) comprises a hoistway (4), an elevator car (6) that is configured for moving along the hoistway (4) and an elevator machine (9) that is configured for driving the elevator car (6). The hoistway (4) comprises a plurality of hoistway walls (24) with each of the hoistway walls (24) comprising a frame (24a) that surrounds a wall portion (24b, 24c) or that is surrounded by a wall portion (24b, 24c), and a plurality of reinforcement elements (26, 28a, 28b, 38) that are mounted to the hoistway walls (24), in particular to the wall portions (24b, 24c) and/or to the frames (24a) of the hoistway walls (24), such as to extend in a horizontal direction when the hoistway (4) is oriented in an upright position. The elevator car (6) and the elevator machine (9) are installed in the hoistway (4) forming an integrated elevator system (2) that is transportable to a desired installation site.

A hydraulic drive system (14) for driving an elevator system (2) comprises a fluid tank (20) for storing a hydraulic fluid (25); a hydraulic fluid supply conduit (22) that is configured for being fluidly coupled to a hydraulic cylinder (12a) of the elevator system (2); a fluid pump (26) that is configured for pumping hydraulic fluid (25) from the fluid tank (20) into the hydraulic fluid supply conduit (22); an electric power supply circuit (30) comprising at least one electric power storage device (34, 36) and configured for receiving single phase alternating current for charging the at least one electric power storage device (34, 36) and for selectively supplying electric power from the at least one electric power storage device (34, 36) to the fluid pump (26); a hydraulic fluid return conduit (24) that is configured for being fluidly coupled to the hydraulic cylinder (12a) for returning hydraulic fluid (25) from the hydraulic cylinder (12a) into the fluid tank (20); and an electric generator (52) that is configured for generating electric power from hydraulic fluid (25) flowing through the hydraulic fluid return conduit (24) and for supplying the generated electric power to the electric power supply circuit (30).

An elevator power system includes a drive including: an AC-DC converter configured to generate a DC voltage on a DC link; a capacitor connected across the DC link; a DC-AC inverter configured to convert the DC voltage to an AC drive signal to power a motor; a rescue unit including: a power converter configured to supply a DC output voltage to the DC link to pre-charge the capacitor; a controller in communication with the drive and the rescue unit, the controller configured to control the power converter to pre-charge the capacitor.

An elevator brake (20) for braking rotation of a shaft (12) in an elevator drive system (5), wherein the shaft (12) extends in an axial direction (A) and is rotatable around an axis of rotation (Z), comprises: a brake disc (24) mounted to the shaft (12) such as to rotate concurrently with the shaft (12); at least one movable plunger (30) that is linearly movable along the axial direction (A) between an engaged position, in which it engages the elevator brake (20), and an released position, in which it releases the elevator brake (20); an actuator that is configured for selectively moving the at least one movable plunger (30) between the engaged position and the released position; and a blocking mechanism (32, 36; 46; 46a, 46b) that is configured for preventing the at least one movable plunger (30) from moving from the engaged position into the released position if the at least one movable plunger (30) has traveled more than a predefined distance from the released position into the engaged position.