BOOT FOR CONSTANT VELOCITY UNIVERSAL JOINT, AND CONSTANT VELOCITY UNIVERSAL JOINT

WIPO Patent Application WO/2010/079674

A1

Provided is a boot for constant velocity universal joint, the boot being capable of flexibly deforming to follow even a large operating angle, capable of effectively dispersing interference pressure between crests, interference pressure between the troughs and a shaft, and stress concentration to the troughs to uniformize such pressure and stress, having improved anti-wear properties and anti-fatigue properties, and having high durability.  Also provided is a constant velocity universal joint capable of using the boot. A bellows section (15) of a boot is provided with three or more crests (7), and also with three or more troughs (6) which are alternately arranged, together with the crests (7), in the axis direction.  In a cross-section of the boot taken in the longitudinal direction thereof, the outer diameter section of each of the crests (7) is formed in a rounded shape.  The curvature radius of the outer diameter sections of one or two crests (7) located at the center portion between a large-diameter section (13) and a small-diameter section (14) is set to be greater than the curvature radius of the outer diameter sections of the remaining crests (7).

JP2603873	[Name of invention] Bellows boots for universal joints
JP2002098239	SHAFT SEALING STRUCTURE AND MANUFACTURING METHOD FOR PLANOGRAPHIC PLATE

TAKABE SHINICHI (JP)

PCT/JP2009/070897

July 15, 2010

December 15, 2009

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NTN TOYO BEARING CO LTD (JP)
TAKABE SHINICHI (JP)

F16J3/04; F16D3/84; F16J15/52

JP2002257152A	2002-09-11
JPS59175721U	1984-11-24
JPH0587254A	1993-04-06
JPS62172853U	1987-11-02
JPS5419851U	1979-02-08

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

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