Patent ID: 9702436
Date: 2017-07-11
CPC Classifications: B66B,F16H

Claim:
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, and wherein the first rotation unit comprises: a first pulley having an outer peripheral surface on which the first wire rope is wound, and having a disk having a through-hole therein; a first planetary gear unit having a plurality of first planetary gears coupled to a front surface of the disk of the first pulley, and a plurality of second planetary gears coupled to a rear surface of the disk and only half teeth on the outer peripheral surfaces of which are engaged with the first planetary gears; a first sun gear in which the main shaft is coupled to an interior thereof, coupled to an exterior of a mounting part formed at a central portion of the first pulley, and inserted into the through-hole to be engaged with the second planetary gears; and a first outer sun gear inserted into the through-hole of the first pulley and some of teeth of which are engaged with the first planetary gears; and wherein the second rotation unit comprises: a second pulley having an outer peripheral surface on which the second wire rope is wound, and having a disk having a through-hole therein; a second planetary gear unit having a plurality of third planetary gears coupled to a front surface of the disk of the second pulley and some of teeth of which are engaged with the first sun gear, and a plurality of fourth planetary gears coupled to a rear surface of the disk and only some of teeth of which are engaged with the third planetary gears; and a second sun gear in which the main shaft is coupled to an interior thereof, coupled to an exterior of a mounting part formed at a central portion of the second pulley, inserted into the through-hole, and only some of teeth of which are engaged with the fourth planetary gears.