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    • 5. 发明申请
    • BALL SCREW WITH BALL SPLINES
    • 球螺丝带球
    • US20100206114A1
    • 2010-08-19
    • US12734152
    • 2008-10-23
    • Katsura KoyagiMasahiro Inoue
    • Katsura KoyagiMasahiro Inoue
    • F16H25/22
    • F16H25/2214F16C29/0685F16C29/0695F16H2025/204Y10T74/19749
    • A ball screw with ball splines is provided which eliminates a fear that balls within a screw groove override spline grooves.A ball screw with ball splines includes a screw shaft 1 having a screw groove 6 and a plurality of straight line-like spline grooves 7 extending in an axial direction which are formed on an outer circumferential surface thereof, a screw nut 2 through which the screw shaft 1 is inserted and on which a screw balls circulating path is formed which corresponds to the screw groove 6 on the screw shaft 1, a spline nut 3 through which the screw shaft 1 is inserted and on which spline balls circulating paths are formed which correspond to the spline grooves 7 on the screw shaft 1, a plurality of screw balls 4 installed in the screw balls circulating path on the screw nut 2, and a plurality of spline balls 5 installed in the spline balls circulating paths on the spline nut 3. A radial position at a bottom 7a of the spline groove 7 on the screw shaft 1 lies further radially outwards than a radially outermost portion of a ball contact portion of the screw groove 6 where the ball contacts when a maximum load is exerted thereon.
    • 提供具有滚珠花键的滚珠丝杠,消除了螺旋槽内的滚珠超越花键槽的担心。 具有滚珠花键的滚珠丝杠包括螺杆轴1,螺杆轴1具有螺纹槽6和沿其轴向方向延伸的多个直线状花键槽7,螺母轴1在其外圆周表面上形成有螺母2, 轴1被插入并形成有与螺杆轴1上的螺纹槽6相对应的螺杆滚珠循环路径,花键螺母3,螺纹轴1穿过该花键螺母3,在其上形成有与其对应的花键球循环路径 到螺杆轴1上的花键槽7,安装在螺母2的螺杆滚珠循环路径中的多个螺纹球4和安装在花键螺母3的花键球循环路径中的多个花键球5。 螺杆轴1上的花键槽7的底部7a处的径向位置比螺旋槽6的球接触部分的径向最外部部分进一步径向向外,其中当球接触时 施加最大载荷。