| 摘要 |
PURPOSE:To improve a heat radiating effect and prevent the occurrence of casting defect by projectingly forming a spindle for installing a wheel on one side of a flange part while radially forming connecting parts which are connected to plural suspension part installing parts on the other side of said flange part. CONSTITUTION:In a spindle complement made of a spherical graphite cast iron in which remaining austenite is mixed in a bainite base composition, a wheel installing spindle 23 is projected on the center part on one side 22 of a flange part 21. And, a connecting part 27 for a trailing link is projected on the other side 24 of the flange part 21 and two damper-strut connecting parts 29 are radially projected being continued from the inner wall 25 of the connecting part 27, while a lower-arm connecting part 33 is projected while being bonded to the outer wall 32 for the connecting part 27 and the connecting part 29. Thereby, due to the radially formed connecting parts 27, 28, 33, a heat radiating effect can be improved while preventing the occurrence of casting defect. |
