Patent Number: 6,332,844

Title: Propeller shaft and constant velocity universal joint for a propeller shaft

Abstract: The width (L) in the circumferential direction of the outer surface 2a of an inner joint member 2 is L.gtoreq.3.5 mm. When the assembly angle (.theta..sub.0) of the torque transmitting ball 3 is set to 50.degree., the width (W) in the axial direction is set so that the ratio Rw (=W/PCD.sub.SERR) between the width (W) in the axial direction and the pitch circle diameter (PCD.sub.SERR) of the teeth of an engagement portion 2c lies within the range of 0.57<Rw.ltoreq.0.95. Thus, while enabling the assembly of the torque transmitting ball at the assembly angle .theta..sub.0 =50.degree., cold forging on the inner joint member 2 is made possible, thereby reducing the processing cost. By reducing the width (W) in the axial direction as much as possible, the weight, dimension, and material cost can be reduced.

Inventors: Hayama; Yoshihiko (Shizuoka-ken, JP), Nagatani; Haruo (Shizuoka-ken, JP)

Assignee: NTN Corporation

International Classification: F16D 3/16 (20060101); F16D 3/224 (20060101); F16D 003/224 ()

Expiration Date: 12/25/2018