Constant velocity joint

Abstract

An annular member (50) in installed on a circular cylinder section (45) of a trunnion (44), and a roller member (48), in the inner periphery of which a needle bearing (46) is held, is installed on the circular cylinder section (45). The needle bearing (46) is held between a flange section (60) formed on one end of the roller member (48) and the annular member (50) installed on the trunnion (44) with a predetermined gap between them. Further a gap (X) between the needle bearing (46) and the annular member (50) is set to satisfy the following relationship. X > R / 2 (1 / cos max - 1) where R: Radius of rotation of the center of the roller member (48) relative to the center axis of an outer member (32). Theta max: Maximum inclination of angle of an inner member (34).

Description

technical field [0001] The present invention relates to a constant velocity joint that connects one propeller shaft to another propeller shaft in, for example, a driving force transmission portion of an automobile. Background technique [0002] Conventionally, constant velocity joints are used in drive force transmission parts of automobiles, which connect one propeller shaft to another propeller shaft to transmit rotational force to each axle. [0003] Figure 20 A partial cross section of such a conventional constant velocity joint 2 is shown (refer to Japanese Patent Application Laid-Open No. 10-184717). [0004] This constant velocity joint 2 includes: a cylindrical outer member 4 connected to one transmission shaft; and an inner member 6 inserted into the outer member 4 and connected to the other transmission shaft. Three guide grooves 8 extending in the axial direction are formed on the inner peripheral surface of the outer member 4 . On the other hand, the inner mem...

AI Technical Summary

Problems solved by technology

At this time, as the inclination angle θ of the inner member 6 increases, the amount of displacement of the roller member 14 increases. Therefore, if the trunnion 10 is not set to be long enough in advance, the roller member 14 will be in contact with the trunnion 10. The base end portion 10a interferes so that the inclination angle θ is limited

On the other hand, if the trunnion 10 is lengthened, the diameter of the outer member 4 is also increased, resulting in an increase in the size of the constant velocity joint 2

[0018] Furthermore, in Figure 22 In the shown roller mechanism 26, for example, when the snap ring 24 is disengaged from the circumferential groove 23 for some reason, the circular motion of the roller 21 is filled by the centrifugal force generated by the rotational motion of the constant velocity joint. The needle roller 27 between the cylinder inner peripheral surface 22 and the support ring 29 may fly out from the inside of the roller 21, impairing the rotation driving force transmission function of the constant velocity universal joint

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