Patent ID: 7544132
Filing Date: 2009-06-09
Classification: F16D,Y10S

Abstract:
1. A constant-velocity fixed joint, comprising: an outer joint part having an inner periphery, said outer joint part having ball raceways provided at said inner periphery; an inner joint part having an outer periphery defining an imaginary inner part outer diameter and an inner joint part axis, said inner joint part having ball raceways provided at said outer periphery and having webs separating said ball raceways of said inner joint part at said outer periphery from one another; said ball raceways of said outer joint part and said ball raceways of said inner joint part being disposed opposite one another for forming raceway pairs; balls having respective balls centers and ball diameters, said balls being held in said raceway pairs; a cage disposed between said outer joint part and said inner joint part, said cage having windows formed therein for holding said balls; said inner joint part and said cage being configured such that at least one of said webs of said inner joint part can be inserted into one of said windows of said cage for assemblability; said joint inner part, when not deflected, being configured to meet the following conditions in a plane intersecting said ball centers: for PCD at most 62 mm: ε/γ greater than 1.6 and for PCD greater than 62 mm: ε/γ greater than 1.8 with PCD being a pitch circle diameter through the ball centers; ε being an angle enclosing one of said ball raceways of said inner joint part between points of intersection of one of the ball diameters with the imaginary inner part outer diameter with respect to a point of intersection of the inner joint part axis and the plane intersecting the ball centers; and γ being an angle enclosing one of said webs between points of intersection of corresponding ones of the ball diameters with the imaginary inner part outer diameter with respect to the point of intersection of the inner joint part axis and the plane intersecting the ball centers.