Patent ID: 9194460
Filing Date: 2015-11-24
Classification: B66B,F16H

Abstract:
1. An apparatus for automatically equalizing tensions of elevator wire ropes, the apparatus comprising: a body having an accommodation space therein; a tension adjusting unit connected to first, second, third, and fourth wire ropes and installed within the body; and a main shaft passing through the tension adjusting unit and coupled to an inner side of the body to be rotatable horizontally, wherein the tension adjusting unit comprises: a first rotation unit coupled to the main shaft and having an outer peripheral surface on which the first wire rope is wound; a second rotation unit coupled to the main shaft, having an outer peripheral surface on which the second wire rope is wound, and rotated in conjunction with the first rotation unit; a third rotation unit coupled to the main shaft, having an outer peripheral surface on which the third wire rope is wound, and rotated in conjunction with the second rotation unit; and a fourth rotation unit coupled to the main shaft, having an outer peripheral surface on which the fourth wire rope is wound, and rotated in conjunction with the third rotation unit, wherein the first rotation unit comprises: a first pulley having a peripheral member having a rope groove in which the first wire rope is wound on an outer peripheral surface thereof, and a disk formed at an inner side of the peripheral member, coupled to the main shaft, and having ring grooves on front and rear surfaces thereof, respectively, such that a first outer ring gear and a first ring gear are partially inserted thereinto; the first ring gear having first inner teeth on an inner peripheral surface thereof and a portion of which is inserted and coupled into an inner peripheral surface of one side of the first pulley; a first planetary gear unit having a plurality of first planetary gears coupled to the front surface of the disk of the first pulley, and a plurality of second planetary gears coupled to the rear surface of the disk and only half of teeth of which are engaged with the first planetary gears; and a first outer ring gear having inner teeth on an inner peripheral surface thereof such that the inner teeth of the first outer ring gear are engaged with teeth of the first planetary gears and coupled to the ring groove on the front surface of the disk of the first pulley, and wherein each of the first and second planetary gears is a spur gear having a predetermined thickness or a dual spur gear in which a large gear having a large diameter and a small gear having a small diameter are integrally formed; wherein the second rotation unit comprises: a second pulley having a peripheral member having a rope groove on which the second wire rope is wound on an outer peripheral surface thereof and a disk formed at an inner side of the peripheral member, coupled to the main shaft, and having ring grooves into which the first ring gear and a second ring gear are partially inserted on front and rear surfaces thereof; the second ring gear having second inner teeth on an inner peripheral surface thereof and a portion of which is inserted and coupled into an inner peripheral surface of one side of the second pulley; and a second planetary gear unit having a plurality of third planetary gears coupled to the front surface of the disk of the second pulley and only some of teeth of which are engaged with the first inner teeth, and a plurality of fourth planetary gears coupled to the rear surface of the disk of the second pulley and the teeth of which are engaged with the third planetary gears and the second ring gear, and each of the third and fourth planetary gears is a spur gear having a predetermined thickness or a dual spur gear in which a large gear having a large diameter and a small gear having a small diameter are integrally formed.