| 摘要 |
PURPOSE:To aim at improvement in rigidity, by constituting a bearing body, having an internal thread to be screwed with an external thread shaft via a ball of a ball screw, so as to have ball rolling surfaces at both outward end faces and to hold the ball in between the ball rolling surface and another ball rolling surface of the raceway block set up at the outside. CONSTITUTION:An internal thread 14 to be used for a ball nut of a ball screw is pierced through a bearing body 10 in the longitudinal direction. An external thread shaft 80 is screwed with the internal thread 14 through a wiper 90 for aim at leak prevention of a lubricant and dust proofing, a through hole 51 of a seal 50 and a through hole 42 of an end cap 40. On the other hand, the bearing body 10 and raceway blocks 70 and 70' are designed so as to hold the ball in between with ball rolling surfaces 11, 11' and 71, 71'. In consequence, rigidity in a bearing is improved as well as compactification in a device is well promoted.
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