| 摘要 |
<p>The bearing device comprises two coaxially arranged thrust bearings (4, 5) which are series-connected with respect to their load, and which each has a separate frictional locking device preventing the bearing from rotating in one or the other direction of rotation, respectively. Each frictional locking device includes a set of clamping bodies (9) located between opposed first and second clamping surface portions, each of which is immovable relative to a first and a second bearing track, respectively, of the associated bearing when the bearing is subjected to an axial load. The first clamping surface portion of either locking device is provided in an element (1) which is common to both bearings and which under axial load retains one bearing track of the other bearing (5). Each of said first clamping surface portions includes a number of first clamping surfaces having generatrices parallel to the axis of the bearing device, and each of these first clamping surfaces is located radially directly opposite and spaced from a cylindric second clamping surface oriented parallel to the axis of the bearing device and in connection with the second bearing track of the associated bearing (4, 5). One of said opposed clamping surfaces cooperating with either set of clamping bodies (9) is formed by the radially inner or outer peripheral surface of a bearing race (7) of the bearing in question. The quoted features ensure that malfunctioning of the locking devices is avoided, and that the locking function is independent of the axial load on the bearing device.</p> |
