| 摘要 |
A linear bearing assembly capable of withstanding the load acting thereon in all directions as it rolls along a pair of headed guide rails arranged parallel to each other, with one guide rail overlying the other and with their heads held opposite to each other. Each guide rail has two pairs of parallel ball raceways of arcuate cross section formed longitudinally on both sides of its head. Each pair of raceways are vertically spaced and angled away from each other. The linear bearing assembly includes a body of H-shaped cross section, having a web disposed between the guide rails and a pair of side flanges on the opposite sides thereof. The bearing body has formed thereon four pairs of ball raceways of arcuate cross section opposed to the four pairs of raceways on the guide rails. A ball return passageway extends longitudinally through the bearing body in the adjacency of each raceway thereon. Fastened to the opposite ends of the bearing body, a pair of end covers have formed therein hairpin grooves each intercommunicating one raceway on the bearing body and one adjacent return passageway therein to allow recirculation of a group of rolling antifriction balls. Cages guide the antifriction balls as they roll between the raceways on the bearing body and the raceways on the guide rails.
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