Motion guide device

Details Motion guide device Motion guide device

2011-07-19

2011-07-19

Ridley, Richard (Department: 3656)

Bearings

Linear bearing

Recirculating

C384S045000

Reexamination Certificate

active

07980763

ABSTRACT:
A motion guide device having a novel scoop section structure whose scoop section is not likely to break even if a movement member is moved at high speed. A scoop section (22) of a movement block (12) scoops balls (13) that roll in a ball rolling groove (11a) of a raceway rail (11) and introduces them into no-load ball return paths (17, 20). The scoop section (22) is formed in a Gothic arch groove shape in which the scoop section (22) is in two-point contact with a ball (13). In a cross-section orthogonal to the advance direction of the balls (13), an angle (contact angle α) formed by a line L1that connects a point P at which the scoop section (22) and a ball (13) are in contact and the center C of the ball (13) and a line L2that connects the center of the ball (13) and a bottom (22a) of the Gothic arch groove-shaped scoop section (22) exceeds 30 degrees and is not more than an angle γ formed by a line L3that connects the center C of the ball (13) rolling in the ball rolling groove (11a) of the raceway rail (11) and an edge (35) of the ball rolling groove (11a) of the raceway rail (11) and the line L2that connects the center C of the ball (13) and the bottom of the ball rolling groove (11a).

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International Search Report of PCT/JP2005/015412, date of mailing Dec. 20, 2005.
International Preliminary Report on Patentability for PCT/JP2005/015412.

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