| 摘要 |
<p>A cradle assembly (10) for a motor vehicule comprises a pair of spaced side framed members (12, 14), a front cross frame member (24) and a rear cross frame member (26). The front cross frame member is connected with front ends (16, 18) of the side frame members. The rear cross frame member extends between rear ends (20, 22) of the side frame members. The frame members are formed from tubular metal blanks by a hydroforming process in which each blank has fluid pressure provided internally thereto and thereby radially expanded so that the frame members have a peripheral configuration modified with respect to an original peripheral configuration of the associated blanks. The side frame members have the amount of metal per unit length varied during the hydroforming thereof so as to present at least one longitudinal area at which i) a transverse cross section defined by the modified peripheral configuration is increased by more than 5 % of an original cross section and ii) the amount of metal per unit length is greater thanat least some other areas of the side frame members. The side frame members each have a rigid suspension mount structure constructed and arranged to mount a vehicle suspension member to the associated side frame member thereof. The rigid suspension mount is rigidly secured to the associated side frame member at the at least one longitudinal area having the transverse cross section defined by the modified peripheral configuration increased by more than 5 % of the original cross section.</p> |
