Patent ID: 6299542
Filing Date: 2001-10-09
Classification: F16D,Y10S

Abstract:
A constant velocity joint comprising:an inner race;inner engagement grooves each taking a circular arc in section and formed in a plurality of locations on an outer peripheral surface of said inner race in a direction right-angled to a circumferential direction;an outer race provided along a periphery of said inner race;outer engagement grooves each taking a circular arc in section and formed in positions facing said inner engagement grooves on an inner peripheral surface of said outer race in the direction right-angled to the circumferential direction;a cage sandwiched in between an outer peripheral surface of said inner race and an inner peripheral surface of said outer race and formed with pockets each elongated in a circumferential direction in positions aligned with said inner engagement groove and said outer engagement groove; anda plurality of balls made capable of rolling along said inner engagement grooves and said outer engagement grooves in a state of being held inwardly of the pockets;wherein an axial crossing angle between a central axis of said inner race and a central axis of said outer race is bisected;said balls are disposed within a bisection plane orthogonal to a plane including these two central axes;at least a part of said plurality of pockets are capable of holding said plurality of balls within said single pocket, and the number of said pockets is even-numbered; andsaid plurality of balls comprises at least 7, and the number of said balls held in each of said pockets is different.