| 摘要 |
<p>The device comprises a plurality of rolling wedging members consisting of diabolo-shaped rollers (42) with two cylindrical end portions (44) and an intermediate portion (46) which is concave according to a generatrix in the form of an arc of circle whose radius corresponds to the half-diameter of a cylindrical rod (18) of the actuator to which the device is associated. The rollers (42) are adapted to be wedged between the rod (18) and convergent surfaces (40) which are formed in a fixed body (22) of the device. The convergent wedging surfaces (40) are convex surfaces having cross-sections in the shape of an arc of circle whose radius of curvature corresponds to the radius of curvature of the arched longitudinal profile of the concave intermediate portions (46) of each of the rollers (42), as well as to the half-diameter of the rod (18). Each of the convex surfaces (40) is in engagement with the concave intermediate portion (46) of one of the rollers (42).</p> |
