| 摘要 |
The arrangement is assembled of an outer (2) and an inner shaft (1) axially moving inside the outer shaft (2) provided with several grooves (5a, 5b, 5c) along its outer surface for the accommodation of parallel rows of balls (4). The inner surface of the outer shaft (2) is provided with axial grooves (8) engaging with linear projections (7a, 7b) axially positioned at the outer surface of the inner shaft (1), but leaving a small gap, facilitating a full contact between both areas (7a, 7b, 8) only when the ball bearing (3) ceases to work. |
