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    Rolling guide device
    86.
    发明专利
    Rolling guide device 有权

    公开(公告)号：JP5349451B2

    公开(公告)日：2013-11-20

    申请号：JP2010500542

    申请日：2009-01-22

    Applicant: Thk株式会社

    Inventor： 武樹 白井 ,  徹 高橋 ,  喜大 濱田

    IPC: F16C29/06 ,  F16C19/52 ,  F16C33/58

    CPC classification number: F16C29/064 ,  F16C33/585

    Abstract: A rolling guide device in which the amount of displacement of a ball (3) in rolling grooves (10, 31) is small whichever of a vertical load and a horizontal load acts on the ball (3) and in which, when a vertical load acts on the ball (3), occurrence of a differential slip of the ball (3) can be suppressed. The rolling guide device is composed of first loaded regions (10a, 31a) facing the direction normal to the surfaces where the rolling grooves (10, 31) are formed and formed in an circular arc shape having a curvature radius slightly greater than that of the spherical surface of the ball, and of a pair of second loaded regions (10b, 10c, 31b, 31c) arranged so as to be contiguous to opposite sides of each of the first load regions (10a, 31a), formed in a circular arc shape having a curvature radius slightly greater than that of the spherical surface of the ball, and arranged so as to inline relative to the direction normal to the surfaces where the rolling grooves (10, 31) are formed. In an initial state, the ball (3) makes contact only with the first load regions (10a, 31a) and gaps are formed between the ball (3) and the second load regions (10b, 10c, 31b, 31c).

    Screw device
    87.
    发明专利
    Screw device 有权

    公开(公告)号：JP5341893B2

    公开(公告)日：2013-11-13

    申请号：JP2010522724

    申请日：2009-07-28

    Applicant: Thk株式会社

    Inventor： 武樹 白井 ,  勝也 飯田 ,  荘志 宮原 ,  勉 富樫

    IPC: F16H25/22

    CPC classification number: F16H25/2214 ,  F16H2025/2242

    Abstract: A screw device enabling integer winding and also enabling rolling elements to circulate smoothly. The screw device comprises a screw shaft (1) having a spiral rolling element rolling groove (1a) in the outer peripheral surface, a nut (2) having a spiral load rolling element rolling groove (2a) facing the rolling element rolling groove (1a) of the screw shaft (1) in the inner peripheral surface and also having a no-load return passage (10) connected to one and the other ends of the load rolling element rolling groove (2a), and a plurality of rolling elements (3) so arranged as to be circulated through a circulation path comprising a load rolling element rolling passage between the rolling element rolling groove (1a) of the screw shaft (1) and the load rolling element rolling groove (2a) of the nut (2) and the no-load return passage (10).  The no-load return passage (10) comprises a pick-up passage (22) the center line of which is arcuate when viewed from the axial direction of the nut (2) and which picks up the rolling elements (3) moving in the load rolling element rolling passage along the arcuate path and an axial passage (24) the center line of which is parallel to the axis of the nut (2) and which allows the rolling elements (3) to move parallel to the axis of the nut (2).

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