TRIPOD CONSTANT-VELOCITY UNIVERSAL JOINT AND METHOD FOR PRODUCING THE SAME

WIPO Patent Application WO/2010/122893

A1

Disclosed is a method for producing a tripod constant-velocity universal joint comprised of an outer ring which has an inner peripheral surface in which three axially extending track grooves are formed, and has roller guiding surfaces axially extending in both sides of each track groove; a tripod member having three leg shafts which are radially projected; and roller units which are rotatably supported by the leg shafts of the tripod member, and are rotatably inserted to the track grooves of the outer ring, wherein, when the material of the leg shaft is forged into a shape of the leg shaft by a molding surface of a molding die, a relief portion is provided on the material front end-side of the molding die, and the outer peripheral surface of the material is molded into a convex round shape by a tapered surface formed in the molding surface to be in contact with the outer peripheral surface of the material and a concave round surface formed between the molding surface and the tapered surface.

IZUMINO JUNICHI (JP)
KONAKA KENJI (JP)
MURAKAMI HIROSHI (JP)
SERA AKIRA (JP)
MIAO JIAHUA (JP)
MAKINO SHUNSUKE (JP)

PCT/JP2010/056070

October 28, 2010

April 02, 2010

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NTN TOYO BEARING CO LTD (JP)
IZUMINO JUNICHI (JP)
KONAKA KENJI (JP)
MURAKAMI HIROSHI (JP)
SERA AKIRA (JP)
MIAO JIAHUA (JP)
MAKINO SHUNSUKE (JP)

F16D3/205; B21K1/14; F16D3/20

JP2007177994A	2007-07-12
JP2002266888A	2002-09-18
JP2008025800A	2008-02-07
JP2000081050A	2000-03-21
JPH04135032A	1992-05-08
JPS624624U	1987-01-12
JPS6220225U	1987-02-06
JPS6249022U	1987-03-26
JP2010053967A	2010-03-11
DE102008020342A1	2009-10-29

See also references of EP 2423525A4

TANAKA Hideyoshi et al. (JP)
Hideyoshi Tanaka (JP)

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