| 摘要 |
872,021. Machine-tool details. VEREINIGTE WERKZEUGMASCHINENFABRIKEN A.G. June 11, 1959 [July 26, 1958], No. 14721/59. Class 83 (3). [Also in Group XXXIV] A mounting for a spindle in a machine-tool such as a drilling or milling-machine comprises a sleeve in which the spindle is movably mounted, spaced-apart bearings in which said sleeve is rotatable and, between said bearings, an annular space provided between the spindle and sleeve which is filled with oil from a supply continuously under-high pressure fed to such space through narrow openings in the sleeve. The spindle, Fig. 1, is rotatably connected with and longitudinally movable within a hollow sleeve 2. The latter is rotatable within an outer sleeve 4 supported in bearings 7, 8. The intermediate sleeve 2 has a first bearing 3 in the outer sleeve 4 and a second bearing 5 in the frame. Between the bearings 7, 8, a small clearance space 9 is provided for high-pressure oil, e.g. a pressure of four atmospheres, and this is connected by a number of narrow passages 16 to a further clearance space 10 between the intermediate and outer sleeves. The clearance spaces &c. are supplied with oil pressure from a regulator 15 through a slip coupling 13 and passages 14, 11. In a modified arrangement a number of annular grooves connected by longitudinal channels replace the clearance space between the spindle and intermediate sleeve and the narrow supply passages are provided within the slip-ring at the end of the intermediate sleeve. In a further modification the oil supply passages are as just described, but, the spindle is an interference fit in the intermediate sleeve and is held therein until the high-pressure oil supply is delivered. |
