COUPLING STRUCTURE OF SNAP RING FOR VEHICLE

Title:

COUPLING STRUCTURE OF SNAP RING FOR VEHICLE

Document Type and Number:

WIPO Patent Application WO/2010/097969

Kind Code:

A1

Abstract:

Provided is a coupling structure of a snap ring for a vehicle wherein the durability is enhanced by relaxing stress concentration on a snap ring fitting groove. As shown at E in Fig. 7, a coupling structure of a snap ring (120) has a gap entirely in the depth direction (direction of an arrow DP in Fig. 7) of an inner circumferential groove (128) between the side wall surface (138) thereof on the side receiving a thrust force FTH in the direction of the central axis (C)and the side surface (140) of the snap ring (120) facing the side wall surface (138) when the thrust force FTH acts on a bearing (112) on the rear wheel side at a pair of opening ends (136) of a transfer case (42) where the inner circumferential groove (128) is broken off so as to be opened in the circumferential direction. The gap is formed by reducing the thickness of the snap ring (120) or widening the lateral groove of the inner circumferential groove (128). Consequently, the thrust force FTH does not act directly on the side wall surface (138) at the opening end (136) because of the gap. Since stress concentration is relaxed at the opening end (136), durability of the transfer case (42) can be enhanced.

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Inventors:

SUGIMOTO TAKAYUKI (JP)

Application Number:

PCT/JP2009/055492

Publication Date:

September 02, 2010

Filing Date:

March 19, 2009

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