| 摘要 |
<p>The universal joint with high mechanical resistance, esp. to abrasion, impact and crushing, consists of an inner spherical element (1) in an outer cage (3). The spherical element is made from a very hard steel, pre-treated at 882-1029 N/mm2 in its core and having a surface hardness of 55 HRC to a depth of 1.5 - 3 mm. The cage is forged and machines from an austenitic manganese steel, with an inner diameter slightly greater than that of the spherical element to give it a circumference 1 - 25 mm longer. The cage's inner surface is cold-forged to give a hardness of 38 - 44 HRC to a slight depth - a few tenths of a millimetre, while its core material retains its ductility. The spherical element is fitted into the cage by pressure after the cage has been cut (5) and opened, and then welded (7) after closing. For universal joints of large diameter (300 mm and more) the materials from which the spherical element and cage are made can be reversed.</p> |
