Patent ID: 7736113
Filing Date: 2010-06-15
Classification: E04H

Abstract:
1. A vehicle transport apparatus for parking systems, comprising: a first platform from which a lifted vehicle to be parked is inserted into a parking system; a second platform provided in a parking space for the vehicle; and a pair of carriers moving between the first platform and the second platform, wherein each carrier comprises: a main frame; at least one drive wheel provided in the main frame so that the carrier is movable; a drive motor rotating said at least one drive wheel; at least two pairs of arms rotatably mounted to each of opposite sides of the main frame; and a hydraulic device rotating the arms between extracted positions and retracted positions of the arms, wherein each of said at least two pairs of arms lift a wheel of the vehicle when the pair of arms are extracted from the main frame by the hydraulic device, and contact surfaces of each of said at least two pairs of arms, which engage with the wheel when the pair of arms are extracted, comprise inclined surfaces based on a horizontal plane, and a plurality of rollers having rotating shafts parallel with a longitudinal direction of each arm is disposed in the inclined surfaces of the pair of arms in two or more rows, and wherein each carrier of the pair of carriers independently moves between the first platform and the second platform using said at least one drive wheel being driven by the drive motor, wherein each said arm is supported by a rotating shaft mounted on the main frame such that the arm is horizontally rotated with respect to the main frame, and the rotating shaft is rotated by an idle gear to be rotated by a rack gear coupled to the hydraulic device, and wherein a first idle gear for rotating an arm of a first pair of said at least two pairs of arms for lifting a wheel located on one side of the main frame is connected with a second idle gear for rotating an arm of a second pair of said at least two pairs of arms for lifting another wheel located at the opposite side of the main frame so that the first pair of arms and the second pair of arms are rotated at a same angular velocity in a synchronized manner, and wherein the hydraulic device comprises: an oil tank provided in the carrier and storing hydraulic oil therein; a hydraulic pump coupled to the oil tank and generating hydraulic pressure; a plurality of hydraulic cylinders rotating the arms using the hydraulic pressure generated from the hydraulic pump; a hydraulic valve provided among the hydraulic pump and the hydraulic cylinders and adjusting a pressure and a direction of the hydraulic oil to be supplied to the hydraulic cylinders; and an accumulator storing the hydraulic oil supplied from the hydraulic pump in a compressed state, thus realizing rapid rotation of the arms: and wherein the accumulator stores the hydraulic oil in the compressed state using compressed gas, so that, when the arms are extracted to lift the wheels of the vehicle, the accumulator discharges the stored hydraulic oil at high speed such that the arms are rapidly extracted to desired angles before the arms lift the wheels of the vehicle using a driving force of the hydraulic cylinders by the hydraulic pump, and, when the arms are retracted to put down the wheels of the vehicles, the arms are retracted to desired angles using driving force of the hydraulic cylinders and, thereafter, the accumulator discharges the stored hydraulic oil at high speed such that the arms are rapidly retracted.