Patent ID: 6830132
Filing Date: 2004-12-14
Classification: B66B

Abstract:
A brake device for elevator, comprising:a hollow box-shaped elevator car; block including a pair of guide rails for guiding upwards and downwards movement of the elevator car; a plurality of racks disposed at the block along the lifting direction in vertical; at least one motor having at least one pinion with toothed engagement at one of the racks, for causing upwards and downwards movement of the elevator car; clutch for controlling power transmission to connect a driving shaft to a driven shaft when a corresponding pinion engages the corresponding rack and is rotated at high speed by elevator drop; hydraulic pump for generating hydraulic pressure from power transmission through a plurality of transmission gears when the clutch delivers power; and a plurality of hydraulic cylinders for braking the elevator by moving a brake pad in tight coupled relationship with the guide rails by hydraulic power from the hydraulic pump.