Method for leaf springs made of fiber-reinforced plastic with integrated eye bushings, and leaf spring made of fiber-reinforced plastic

A leaf spring comprising:

• a first bushing and a second bushing;
• a first fiber-reinforced composite layer having a central region extending between opposite first and second end regions;
• and
• a second second fiber-reinforced composite layer layer having a central region extending between opposite first and second end regions;
• wherein the first and second end regions of each layer are wrapped about first and second bushings, respectively, such that the first end region of each layer terminates adjacent to the first bushing, and the second end region of the each layer terminates adjacent to the second bushing;
• wherein each end region of the first layer is positioned between an associated bushing and an associated end region of the second layer;
• wherein the central region of the first layer extends along only a first side of a curved spring centerline;
• and
• wherein the central region of the second layer extends along only a second side of the curved spring centerline.

A fiber-reinforced leaf spring for use in a motor vehicle, the leaf spring comprising:

• a first bushing element having a first center axis;
• a second bushing element having a second center axis;
• and
• an elongate leaf spring main body with a first eye bushing at a first end and a second eye bushing at a second end, wherein the leaf spring main body and the first and second eye bushings are formed using at least a first layer and a second layer of a plastic and/or composite material, wherein each of the layers runs along a centerline of the leaf spring main body to form the leaf spring main body and, to form the first and second eye bushings, is respectively wrapped around the first bushing element and around the second bushing element;
• wherein each of the layers runs in only one ply along the centerline;
• wherein the first layer is wrapped in a first circumferential direction around the first bushing element and in the same first circumferential direction around the second bushing element, such that a first end region of the first layer terminates adjacent to the first bushing element, a second end region of the first layer terminates adjacent to the second bushing element, and a central region of the first layer between the first and second end regions only runs along a first side of the centerline between the first and second bushing elements;
• wherein the second layer is wrapped in a second circumferential direction, counter to the first circumferential direction, around the first bushing element and in the same second circumferential direction around the second bushing element, such that a first end region of the second layer terminates adjacent to the first bushing element, a second end region of the second layer terminates adjacent to the second bushing element, and a central region of the second layer between the first and second end regions runs only along a second side, opposite the first side, of the centerline between the first and second bushing elements;
• and
• wherein the leaf spring main body and the first and the second eye bushing all have a uniform wall thickness.