| 摘要 |
<p>The present invention provides a motion guide device having an improved scoop section structure which barely induces damage thereto when a moving member is moved at high speed. Balls (13) rolling in ball rolling grooves (11a) of a raceway rail (11) are scooped by a scoop section (22) of a moving block (12) for introduction into non-load ball return paths (17, 21). The scoop section (22) is formed into a shape of a Gothic arch groove for two-point contact with a ball (13) and in a cross-section perpendicular to a traveling direction of the ball (13), an angle (contact angle ±) made between a line (L1) connecting a point (P) where the scoop section (22) contacts the ball (13) to a center (C) of the ball (13) and a line (L2) connecting the center (C) of the ball (13) to a bottom (22a) of the scoop section (22) of the Gothic arch groove is more than 30° and equal to or less than an angle (³) made between a line (L3) connecting the center (C) of the ball (13) that rolls in the ball rolling grooves (11a) of the raceway member (11) to an edge (35) of the ball rolling groove (11a) in the raceway rail (11) and the line (L2) connecting the center (C) of the ball (13) to a bottom of the ball rolling groove (11a) in the raceway member (11).</p> |
