| 摘要 |
<p>The thrust unit (8) comprises a bearing with two rings (12, 13) and rolling bodies (14), and caps (16, 17) of a synthetic material in contact with the rings. One of the caps (17) has a circular collar with a chamfered edge (23c) and the other has an axial portion (20) with hooks (21) that have similar chamfered edges (21c) that allow the collar to pass them when they are assembled by pushing together.</p> |
