| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hollow shaft capable of stably preventing lubricant (grease) from intruding in a hollow part, simplifying assembling operation to a constant velocity universal joint and the like and reducing cost. <P>SOLUTION: A spline 10 is formed in an outer circumference surface of an end part in the hollow shaft. The end part is plastically treated by swaging or upsetting and its opening part is closed. Both cold plastic process and hot plastic process can be used. As it is unnecessary to close the opening part by using a plug member such as a sealing plug, it is possible to simplify the assembling operation. As the opening part is closed by a plastic treatment, the hollow shaft has excellent workability and can be closed stably and securely and reliability of a function for preventing foreign matter such as the lubricant (grease) from entering. <P>COPYRIGHT: (C)2007,JPO&INPIT |
