Patent ID: 6454042
Filing Date: 2002-09-24
Classification: B62D,F16H,Y10T

Abstract:
A ball screw which comprises:a screw shaft; a rotary nut having at an inner periphery thereof an inner spiral groove facing the screw shaft; a plurality of balls disposed in a rolling guideway formed between the screw shaft and the inner spiral groove for transmitting a force between the rotary nut and the screw shaft; and a bridge member fitted to the rotary nut and having a plurality of connecting grooves, each connecting neighboring convolutions of the inner spiral groove, wherein said bridge member is provided with an arm being engaged with the inner spiral groove of the rotary nut so as to position the bridge member in an axial direction with respect to the rotary nut; and wherein said arm is provided with a slit extending from a tip end toward a base portion of the arm.