| 摘要 |
PROBLEM TO BE SOLVED: To provide a linear motion bearing capable of increasing the effective ball number and easy to miniaturize. SOLUTION: This linear motion bearing is composed of an outer cylinder (11), a cylindrical sphere cage (16) respectively formed at an interval in the peripheral direction on an outer peripheral surface of a cylindrical body part (12) fitted to the inside of this outer cylinder and having a plurality of sphere circulating grooves (15) having a slender opening (14) capable of partially projecting a sphere to the inner peripheral side, and a plurality of spheres (17) stored in the respective sphere circulating grooves. The linear motion bearing is characterized in that a peripheral groove (11a) is mutually formed at an interval on an inner peripheral surface of the outer cylinder, and an extension part (13) having an outer diameter smaller than an inner diameter of the outer cylinder, is respectively provided on both ends of a body part of the cylindrical sphere cage, and an annular fastener (19) is stored in its outer peripheral part in the respective peripheral grooves, and the movement in the length direction of the outer cylinder of the cage, is prevented by arranging an inner peripheral part in contact with a base part (13a) of the respective extension parts of the body part of the cylindrical sphere cage. COPYRIGHT: (C)2010,JPO&INPIT
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