| 摘要 |
659,349. Rectilinear-motion-bearings. SOC. GENEVOISE. D'INSTRUMENTS DE PHYSIQUE. April 29, 1949, No. 11494. Convention date, May 5, 1948. [Class 12 (i)] A rectilinear-motion bearing for relieving the pressure of a slide 2 on tracks-3, 4 comprises a row of spaced roller members 9, a row of spaced supporting rollers 8 bearing against the underside of the slide 2, and a plurality of connecting rods 10, 11 arranged. in zig-zag fashion connecting the rollers 9 and supporting members 8. A tensioning device is mounted . on the slide and engages a roller member 9 at one extreme end of the row, the extreme member at the other end of the row being engaged by a portion of the slide 2. One such bearing is disposed on each side of the slide 2 and is . enclosed by a cover plate 7. The tensioning device may comprise. a spring pressed piston 15 sliding in a bore 16 in the slide 2. In a modification, the spring tension. is adjustable by means of a screw 18, Fig. 5, having a graduated head 19. In a further modification, the piston is replaced by a nut 22, Fig. 6, which may be moved axially by rotation of a screw 20. Alternatively the piston may be controlled by hydraulic pressure. In the embodiment shown in Fig. 8, two trains of rollers are arranged symmetrically about a central fixed point 27 to which they are connected. |
