| 摘要 |
936,784. Bearings. FICHTEL & SACKS A.G. Jan. 25, 1962 [Jan. 28, 1961; Feb. 3, 1961], No. 2915/62. Class 12 (1). [Also in Group XXXI] To reduce the minimum size of a freewheel cyclehub (see Group XXXI) parts of its inner mechanism are adapted to allow small diameter ball-bearing holders 18 and 34 to be assembled with their balls 16 and 32 in journals 14 and 30 on a bearing- ring 12 and a drive-member 26 respectively. Normally the minimum size of ball-holder that can be used is governed in the first instance by the overall diameters of a surface 60 on a part 66 integral with or keyed on to the ring 12 and which serves to expand the brake sleeve 54 and in the second instance by the diameter of a ring of projections 74 at the ends of inclined surfaces 72 on the drive member 26 which serve to clamp rollers 42 against the inner surface of the hub-shell 36 to transmit the drive in a forward direction only (Fig. 3). These diametral dimensions have minima fixed by functional considerations. In the first instance grooves 80 are cut through the surface 60 to permit the balls 16 in their holder 18 to pass through as in Fig. 6. In the second instance the number of balls in the holder 34 is divisible by the number of rollers 42 so that the balls 32 in their holders 34 pass over the surfaces 72 between the projections 74 without obstruction. |
