Patent ID: 8443950
Filing Date: 2013-05-21
Classification: B60R,F16F

Abstract:
1. A shock absorber for a vehicle for absorbing shock energy at the time of collision by being internally provided in a vehicle constituent member, the shock absorber for a vehicle comprising: a first wall that is subjected to a shock; a second wall spaced apart from and opposed to the first wall; and a peripheral wall connecting the first wall and the second wall, to form a hollow portion, wherein the first wall and the second wall are each provided with a plurality of shock absorption ribs spaced a distance apart from and parallel to one another, wherein the shock absorption ribs each have a deep elongated groove having a welding surface formed therein by respectively depressing the first wall and the second wall into recessed groove shapes and integrally joining the respective front end surfaces of recessed grooves formed in the first wall and in the second wall to each other and a shallow elongated groove formed by opposing the front end surfaces with a distance (f) apart from each other, the deep elongated groove and the shallow elongated groove being alternately formed to form a symmetrical structure on the welding surface, and the average value of the distance (f) in the shallow elongated groove is in a range of 0.3 to 0.8 times the average value of a distance (D) between the first wall and the second wall.