| 摘要 |
PURPOSE: A propeller shaft of a vehicle is provided to maintain the spline function of a slip joint, to improve durability, and to prevent the contamination of peripheral parts by avoiding the leakage of grease. CONSTITUTION: A propeller shaft of a vehicle includes a pipe(11), a piston(13), and a bellows(15). The bellows is embedded in the pipe at the front end portion of the piston. When the piston is compressed, the bellows is stretched. A ball is formed in a plate(21) formed at a side of the bellows. While being stretched, the bellows rolls on the inner surface of the pipe by the ball. Then, the grease embedded in the bellows flows is sucked in the bellows by compression and stretching. Thereby, the leakage of the grease is avoided even when the piston is inserted to the pipe.
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