| 摘要 |
862,661. Screw and - nut mechanisms. GENERAL MOTORS CORPORATION. July 27, 1959 [Aug, 18, 1958], No. 25663/59. Class 80(3). A ball-bearing helical spline assembly for interconverting rotary and linear movement comprises an outer tubular member 10 with a plurality of internal helical ball grooves (four, as shown), an intermediate sleeve 20 with complementary external helical ball-grooves, an inner member 26 with the same number of external helical ball grooves forming ball-return passages in conjunction with the inner surface of the sleeve 20, and guide elements 36 fixed to the inner member 26 for the transfer of balls between the grooves adjacent the outside and inside of the sleeve 20. The elements 36 act via the balls to prevent relative axial and rotary movement between the sleeve 20 and member 26. |
