Connecting structure of exhaust system member and insertion member

Abstract

A connecting structure of an exhaust system member and an insertion member includes a first divided part 44 and a second divided part 45 each formed like a semi-circular cylinder. The first and second divided parts 44 and 45 are coupled like a barrel so that projecting portions 45 c are engaged with inner sides of bulge portions 44 c, respectively, and end portions of the first and second divided parts 44 and 45 are contacted to form a circular cross section, the both edge portions of the first and second divided parts 44 and 45 being fixed with each other by welding X 1 to form the exhaust system member (diffuser 43 ). After the insertion member (catalyst carrier case 41 ) is inserted in the end portion 43 a of the diffuser 43 a, the end portion and an outer circumferential surface of the catalyst carrier case 41 are fixed by welding X 2 all along the outer circumferential surface.

1 . A connecting structure of an exhaust system member and an insertion member comprising:
 a first divided part that is formed like a semi-circular cylinder to have bulge portions respectively projecting in an outward direction at both edge portions thereof except end portions thereof; and   a second divided part that is formed like a semi-circular cylinder to have projecting portions respectively engageable with inner sides of the bulge portions of the first divided part at both edge portions except end portions thereof, wherein   the first divided part and the second divided part are coupled with each other to form a barrel-like shape so that the projecting portions are engaged with the inner sides of the bulge portions, respectively;   the end portions of the first divided part and the second divided part are contacted with each other to form a circular cross section, wherein   the both edge portions of the first divided part and the second divided part are welded with each other; and wherein   the end portions and an outer circumferential surface of the insertion member are welded with each other all along the outer circumferential surface.   
   
   
       2 . The connecting structure of the exhaust system member and the insertion member according to  claim 1 , wherein
 the exhaust system member is a diffuser of a catalytic converter, and wherein   the insertion member is a catalyst converter case that contains a catalyst converter.