Patent ID: 9079472
Filing Date: 2015-07-14
Classification: B60G,F16F

Abstract:
1. A suspension spring for a shock absorber using carbon fiber reinforced plastic, the suspension spring comprising: a piston rod reciprocatingly connected to a cylinder filled with working fluid; a first sheet mounted on an end portion of the cylinder; a second sheet mounted on an end portion of the piston rod; and a spring unit provided by stacking a plurality of unit bodies made of a prepreg of a multi-stacked carbon fiber synthesis resin, the unit bodies having openings, through centers of which the piston rod passes and which gradually widen toward one side, wherein the respective unit bodies are stacked along a length direction of the piston rod such that the openings face one another, and the stack of the unit bodies includes one of the following structures: the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the fist sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is faced to the second sheet, the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the second sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is faced to the second sheet, the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the first sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is faced to the first sheet, or the opening of the unit body which is disposed at the most bottom end in the plurality of the unit bodies is faced to the second sheet and the opening of the unit body which is disposed at the most upper end in the plurality of the unit bodies is faced to the first sheet.