| 摘要 |
<p>The low-friction light-load mechanical transmission is for converting between rotary and linear motion, comprising a screw shaft having a helical thread groove. A nut body has a radially movable socket member in which there is received a thread-engaging ball. The socket has a circular load surface surrounding a circumference of the ball, and a second load surface centrally located w.r.t. the circular load surface and displaced laterally. The second load surface of the socket member engages the ball along a relatively small area. The helical thread groove has a pair of co-extensive, helical troughs, each trough being partially circular in cross-section. The troughs intersect one another adjacent the root of the thread groove, each trough having a radius of curvature slightly greater than the radius of the ball.</p> |
