Strut type shock absorber

摘要

A strut type shock absorber ( 1 ) comprises an outer shell ( 2 ) and a knuckle bracket ( 3 ). A curved portion ( 4 ) of the knuckle bracket ( 3 ) positioned in close contact with the outer shell ( 2 ) comprises a reinforcing flange ( 7 ) formed by bending a part of an axial end of the curved portion ( 4 ) outward and a no-flange portion ( 6 ), both of which are welded onto the outer shell ( 2 ). By setting an axial distance (H) from an inflection start point to an inflection end point of the outer circumferential surface of the reinforcing flange ( 7 ) to be equal to an axial distance from the inflection start point to the no-flange portion ( 6 ), and by forming an insulation portion ( 9 ) between the reinforcing flange ( 7 ) and the no-flange portion ( 6 ), an effectual welding operation and the prevention of molten metal from flowing over the reinforcing flange ( 7 ) during welding are realized.