Construction of coupling exhaust pipes of vehicle

A connection structure and exhaust pipe technology, applied in the direction of flange connection, exhaust device, pipe/pipe joint/pipe fitting, etc., can solve the problems of increased weight and cost, large number of parts, troublesome welding process, etc., to achieve Avoidance of weight, ease of manufacture, effect of reduced quantity
CN100447384CActive Publication Date: 2008-12-31NAKAGAWA SANGYO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAKAGAWA SANGYO
Publication Date
2008-12-31

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Abstract

The invention provides a connection structure of a vehicle exhaust pipe, in which the opening edges (11, 21) of the upstream exhaust pipe (1) and the downstream exhaust pipe (2) face each other along the radial direction by expanding and forming After being bent outward, it is folded inward along the radial direction to form a flange portion (12, 22). The two flange parts (12, 22) are butted through the gasket (31), and are mechanically resisted and combined with each other by bolts (41) and nuts (42).
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Description

Technical field

[0001] The present invention relates to a connection structure of vehicle exhaust pipes, and in particular to a connection structure that can connect exhaust pipes to each other without welding and with a small number of parts. Background technique

[0002] Figures 11 and 12 show an example of a conventional exhaust pipe connection structure. In FIG. 12, the pipe ends of the upstream exhaust pipe 1 and the downstream exhaust pipe 2 are fixed by welding with substantially diamond-shaped (FIG. 11) connecting flanges 61, 62, and bolts 64 and nuts 65 are used. The connecting flanges 61 and 62 are connected via the gasket 63, and the two exhaust pipes 1 and 2 are thus connected together (first prior art example).

[0003] Fig. 13 and Fig. 14 show other examples of the conventional exhaust pipe connection structure. In FIG. 14, the entire circumference of one side of the locking rings 71 and 72 formed in a U-shaped cross-section is welded and fixed to the outer circumfe...

Claims

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