Muffler

Abstract

A muffler including an outer shell; an end plate that is laser-welded to the outer shell; a sheathing member that is provided on the outer side of the outer shell to sheath the outer shell with the sheathing member; and a shielding portion that prevents liquid from entering into the sheathing member through a clearance formed between the outer shell and the end portion of the sheathing member, at which the sheathing member is connected to the outer shell. Providing such shielding portion makes it possible to prevent liquid such as water from entering into the sheathing member through the clearance, because the shielding portion blocks such liquid. As a result, inconvenience due to entry of the liquid into the space is prevented, and connection between the sheathing member and the outer shell is secured.

1 . A muffler, comprising:
 an outer shell;   an end plate that is laser-welded to the outer shell;   a sheathing member that is provided on an outer side of the outer shell to sheath the outer shell with the sheathing member; and   a shielding portion that prevents liquid from entering into the sheathing member through a clearance formed between the outer shell and an end portion of the sheathing member, at which the sheathing member is connected to the outer shell.   
   
   
       2 . The muffler according to  claim 1 , wherein
 the shielding portion is formed of a shielding member that is provided to the end plate so as to face the clearance.   
   
   
       3 . The muffler according to  claim 2 , wherein
 the shielding member is provided on an outer side of the end portion of the sheathing member so as to cover the end portion of the sheathing member without contacting the sheathing member.   
   
   
       4 . The muffler according to  claim 3 , wherein
 the shielding member has a U-shape, and is arranged so as to cover the end portion of sheathing member from a bottom portion of the end portion of the sheathing member up to a predetermined height in both side portions of the sheathing member.   
   
   
       5 . The muffler according to  claim 3 , wherein
 the shielding member has an annular shape, and is arranged so as to cover an entire periphery of the end portion of the sheathing member.   
   
   
       6 . The muffler according to  claim 2 , wherein
 the shielding member is formed of a bent portion that is formed by bending an end portion of the end plate so that the end portion of the end plate protrudes outward in a substantially radial direction of the muffler.   
   
   
       7 . The muffler according to  claim 6 , wherein
 the shielding member has a U-shape, and is arranged so as to cover the end portion of sheathing member from a bottom portion of the end portion of the sheathing member up to a predetermined height in both side portions of the sheathing member.   
   
   
       8 . The muffler according to  claim 6 , wherein
 the shielding member has an annular shape, and is arranged so as to cover an entire periphery of the end portion of the sheathing member.   
   
   
       9 . The muffler according to  claim 1 , wherein
 the shielding portion is formed of a shielding member that is provided to the outer shell so as to face the clearance.   
   
   
       10 . The muffler according to  claim 9 , wherein
 the shielding member is formed of a bent portion that is formed by bending an end portion of the outer shell so that the end portion of the outer shell protrudes outward in a substantially radial direction of the muffler.   
   
   
       11 . The muffler according to  claim 10 , wherein
 the shielding member has a U-shape, and is arranged so as to cover the end portion of sheathing member from a bottom portion of the end portion of the sheathing member up to a predetermined height in both side portions of the sheathing member.   
   
   
       12 . The muffler according to  claim 10 , wherein
 the shielding member has an annular shape, and is arranged so as to cover an entire periphery of the end portion of the sheathing member.   
   
   
       13 . The muffler according to  claim 9 , wherein
 the shielding member is formed of an expanded portion that is formed by expanding an end portion of the outer shell so that the end portion protrudes outward in a substantially radial direction of the muffler.   
   
   
       14 . The muffler according to  claim 13 , wherein
 the shielding member has a U-shape, and is arranged so as to cover the end portion of sheathing member from a bottom portion of the end portion of the sheathing member up to a predetermined height in both side portions of the sheathing member.   
   
   
       15 . The muffler according to  claim 13 , wherein
 the shielding member has an annular shape, and is arranged so as to cover an entire periphery of the end portion of the sheathing member.