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1. 发明申请

WO2016181341A1 LINEAR DRIVE MECHANISM OF THE SCREW AND NUT TYPE WITH PERFECT ROLLING CONTACT 审中-公开
标题翻译：具有完美滚动接触的螺丝和螺母类型的线性驱动机构
公开(公告)号：WO2016181341A1
公开(公告)日：2016-11-17
申请号：PCT/IB2016/052739
申请日：2016-05-12
申请人： FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA
发明人： FEATHERSTONE, Roy
IPC分类号： F16H25/22
CPC分类号： F16H25/2295
摘要： The mechanism (10) comprises a threaded shaft (12) extending along a longitudinal axis (z); a nut (14) arranged coaxially with the threaded shaft (12); a plurality of a plurality of rolling bearings (18) interposed between the threaded shaft (12) and the nut (14), each of the bearings (18) comprising an outer race (22) fixed to the nut (14), an inner race (20) which is arranged coaxially with the outer race (22) and is rotatable relative to the outer race (22) about an axis of rotation (z'), and a plurality of rolling members (24) interposed between the outer race (22) and the inner race (20); and a corresponding plurality of rings (16), each of which is fixed to the inner race (20) of a respective bearing (18) so as to rotate therewith about the same axis of rotation (z'), and is interposed between the inner race (20) of the bearing (18) and the threaded shaft (12) in such a manner that an inner surface (16a) of the ring is in contact with a screw thread (12a) of the threaded shaft (12). The rings (16) and the bearings (18) are arranged in such a manner that their respective axes of rotation (z') are both inclined by a first angle (α) and positioned at a first distance (α) with respect to the longitudinal axis (z) of the threaded shaft (12), said first angle (α) and said first distance (α) being the same for all the rings (16). The shape of the screw thread (12a) of the threaded shaft (12) and the shape of the inner surface (16a) of each ring (16) are configured in such a manner that each ring (16) is in perfect rolling contact with the threaded shaft (12) along a respective contact line (v) that is fixed relative to the nut (14) and is both inclined by a second angle ( β ) and positioned at a second distance ( b ) with respect to the longitudinal axis (z) of the threaded shaft (12).
摘要翻译：机构（10）包括沿着纵向轴线（z）延伸的螺纹轴（12）。与螺纹轴（12）同轴布置的螺母（14）; 多个滚动轴承（18）插入在螺纹轴（12）和螺母（14）之间，每个轴承（18）包括固定到螺母（14）的外座圈（22）与所述外座圈（22）同轴布置并且可围绕旋转轴线（z'）相对于所述外座圈（22）旋转的座圈（20）和插入在所述外座圈（22）之间的多个滚动构件（24）（22）和内圈（20）; 以及相应的多个环（16），每个环固定到相应的轴承（18）的内座圈（20），以便围绕相同的旋转轴线（z'）旋转，并且介于轴承（18）的内圈（20）和螺纹轴（12），使得环的内表面（16a）与螺纹轴（12）的螺纹（12a）接触。环（16）和轴承（18）以这样的方式设置，使得其各自的旋转轴线（z'）都倾斜第一角度（α）并且相对于第一角度α位于第一距离（α）所述螺纹轴（12）的纵向轴线（z），所述第一角度（α）和所述第一距离（α）对于所有环（16）是相同的。螺纹轴（12）的螺纹（12a）的形状和每个环（16）的内表面（16a）的形状被构造成使得每个环（16）完全滚动接触所述螺纹轴（12）沿着相对于所述螺母（14）固定的相应接触线（v）并且都倾斜第二角度（β）并且相对于所述纵向轴线位于第二距离（b）（z）。

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