| 摘要 |
A joint assembly has a secured type constant velocity universal joint, a slide type constant velocity universal joint, and substantially cylindrical elastomer unit covers. The secured type constant velocity universal joint includes one outer joint member formed with a plurality of curved and axially extending first track grooves on its inner circumference. A joint inner ring is formed on its outer circumference with second track grooves opposite to the first track grooves. Torque transmitting balls are contained within ball tracks formed by the first and second track grooves. A cage rollably holds the torque transmitting balls within the ball tracks. A drive shaft has one end connected to the joint inner ring. A boot is mounted on the drive shaft and on an outer circumference at an opened side of the one outer joint member. The slide type constant velocity universal joint includes a boot mounted on the drive shaft and on an outer circumference at an opened side of the outer joint member. The unit covers have reduced diameter portions and are mounted on the outer circumferences of both the constant velocity universal joints. Each of the unit covers is formed as two parts divided along a parting plane including its axis. Each has radially extending flat abutting surfaces on the parting plane. Fastening portions are formed on the abutting surfaces and adapted to be engaged, via an elastic deformation of them, so that the unit covers are detachably mounted on both the constant velocity universal joints.
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