Elevator with roller-pinion drive

摘要

An elevator has a car movable within a hoistway, a rack extending along the hoistway, the rack having a toothed profile with wave troughs and wave crests and a drive mounted in proximity to the rack so that the drive interacts with the rack to move the car. The drive includes a roller pinion unit fixedly mounted on a shaft and having a predetermined number of roller pinions arranged in a circle around the shaft and extending parallel to the shaft. The roller pinion unit interacts with the toothed profile of the rack. The drive also includes a motor unit configured to rotate the shaft. Optionally, the drive includes a brake unit configured to act on the shaft.

主权项

1. An elevator, comprising:
a car movable within a hoistway; two racks extending along the hoistway, each rack having a toothed profile with wave troughs and wave crests; two drives mounted in proximity to the racks so that each drive interacts with one of the racks to move the car, each drive comprising:
a roller pinion unit fixedly mounted on a shaft and having a predetermined number of roller pinions arranged in a circle around the shaft and extending parallel to the shaft, the roller pinion unit interacting with the toothed profile of the rack; anda motor unit configured to rotate the shaft; and a tension member interconnecting the two drives and permitting the two drives to move relative to one another along the racks, wherein the car is supported by a pulley box on the tension member.