| 摘要 |
PROBLEM TO BE SOLVED: To provide a cross shaft member whose static strength can be greatly increased with a minimum increase in the weight. SOLUTION: The cross shaft member 1 comprises four shaft portions 3 arranged in a cross shape on the outer periphery of a barrel portion 2, and a recessed portion 7 formed in the barrel portion 2 with its depth perpendicular to a virtual plane including the axes of the four shaft portions 3. In the recessed portion 7, ribbed build-up portions 8 are quarterly arranged on the virtual plane along a direction about 45°to the axes of the shaft portions 3. COPYRIGHT: (C)2009,JPO&INPIT |
