PROBLEM TO BE SOLVED: To provide a ball screw capable of suppressing collision sound between an end deflector and a ball when the ball enters the end deflector from a spiral groove of a screw shaft, and a steering device.SOLUTION: A ball screw includes: a nut; a screw shaft on the outer peripheral surface of which a spiral groove 36 is formed; an end deflector 2 attached to the nut; and a plurality of balls 41 rolling along the spiral groove 36. The end deflector 2 includes a pair of ball lifting units 71, 72 provided so as to hold a width center of the spiral groove 36 therebetween. The ball lifting units 71, 72 hold the width center of the spiral groove 36 and support the ball 41 at two places separated from each other in a width direction, thereby to lift the ball 41 from the spiral groove 36.SELECTED DRAWING: Figure 8
【課題】ボールがねじ軸の螺旋溝からエンドデフレクタに入り込む際のエンドデフレクタとボールとの衝突音を抑制できるボールねじおよび操舵装置を提供する。【解決手段】ナットと、外周面に螺旋溝36が形成されたねじ軸と、ナットに取り付けられるエンドデフレクタ2と、螺旋溝36に沿って転動する複数のボール41と、を備えるボールねじであって、エンドデフレクタ2は、螺旋溝36の幅中心を挟んで設けられる一対のボール持ち上げ部71,72を備え、このボール持ち上げ部71,72は、螺旋溝36の幅中心を挟んで幅方向に離間する2ヶ所でボール41を支持することで、ボール41を螺旋溝36から持ち上げる。【選択図】図8
BALL SCREW AND STEERING DEVICE
ボールねじおよび操舵装置
2016-07-25
Patent
Electronic Resource
Japanese
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