Composite rim of vehicle wheel and method of manufacturing the same
Disclosed are a composite rim of a vehicle wheel and a method of manufacturing the same, which is reduced in weight through the use of a continuous fiber composite. The rim of a vehicle wheel may be formed by stacking composite sheets, each prepared by impregnating fibers with a resin to form a sheet. The composite sheets may be stacked in multiple layers such that end portions of the respective composite sheets may contact each other in a circumferential direction of the wheel, and discontinuous interfaces, formed at the contacting end portions of the respective composite sheets along an axial direction of the wheel, may not be aligned with each other.
1. A rim of a vehicle wheel, comprising:
a plurality of composite sheets, each of which comprises a fabric sheet and a resin, where the resin is impregnated in the fabric sheet,
wherein each of the fabric sheet comprises:
continuous fibers;
a base layer comprising one or more of the composite sheets wherein end portions of the respective composite sheets in the base layer contact each other in the circumferential direction of the wheel and discontinuous interfaces of the respective composite sheets in the base layer are formed at the contacting end portions of the respective composite sheets in the base layer in the axial direction of the wheel; and
a reinforcement layer disposed on the base layer and comprising one or more of the composite sheets wherein end portions of the respective composite sheets in the reinforcement layer contact each other in the circumferential direction of the wheel and discontinuous interfaces of the respective composite sheets in the reinforcement layer are formed at the contacting end portions of the respective composite sheets in the reinforcement layer in the axial direction of the wheel,
wherein the reinforcement layer is formed in multiple layers by stacking the one or more composite sheets, and the discontinuous interfaces of the respective composite sheets in the reinforcement layer are not aligned with each other, and
wherein the discontinuous interfaces formed in the base layer and the discontinuous interfaces formed in the reinforcement layer are not aligned with each other.
2. The rim according to claim 1 , comprising:
a rim body having a cylindrical shape;
a rim outer portion; and
a rim inner portion, wherein the rim outer portion and the rim inner portion are formed both axial ends of the rim body so as to have an increased diameter.
3. The rim according to claim 2 , wherein each of the composite sheets comprises a body area forming the rim body, an outer area forming the rim outer portion, and an inner area forming the rim inner portion, and
wherein the outer area and the inner area of the composite sheet comprises cutting portions, which are cut in the axial direction of the wheel and are spaced apart from each other in the circumferential direction of the wheel.
4. The rim according to claim 3 , wherein the cutting portions are spaced apart from each other by a length of an arc corresponding to a predetermined angle about a center of the rim, and the predetermined angle is equal to or less than about 5 degrees.
5. The rim according to claim 1 , wherein each of the composite sheets comprises a body area forming the rim body, an outer area forming the rim outer portion, and an inner area forming the rim inner portion, and
wherein the outer area and the inner area of the composite sheet comprises cutting portions, which are cut in the axial direction of the wheel and are spaced apart from each other in the circumferential direction of the wheel.
6. The rim according to claim 5 , wherein a heat-resistant resin is impregnated in the body area of the one or more composite sheets constituting the base layer,
wherein an impact-resistant resin is impregnated in the outer area and the inner area of the one or more composite sheets constituting the base layer, and
wherein a fatigue-resistant resin is impregnated in the one or more of the composite sheets constituting the reinforcement layer.
7. A vehicle comprising a rim according to claim 1 .
8. A method of manufacturing the rim of a vehicle wheel, the rim according to claim 1 .