| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive shaft for a vehicle in which pressure in a boot from can be prevented from being minus even if the temperature in the boot rises up to a high temperature and then abruptly falls.SOLUTION: A drive shaft 1 for a vehicle includes a hollow drive shaft 7 which has an opening part 7b at one end part 7a and also internally has a pressure control chamber 7c communicating with the opening part 7b; a constant-speed universal joint 9 coupled to the one end part 7a of the hollow drive shaft 7; a boot 13 which covers a connection part between the hollow drive shaft 7 and constant-speed universal joint 9 and is filled with grease 19; and an air-permeable filter 17 which is arranged at the one end part 7a to cover the opening part 7b, and passes air through, but controls passage of the grease 19, expression 2 holds between the capacity of the boot 13 and the capacity V2 of the pressure control chamber 7c. |
