Patent ID: 8061696
Filing Date: 2011-11-22
Classification: B60G

Abstract:
1. A shock-absorbing spring for vehicles, said spring made of a spiral steel bar and characterized by having a deformed egg-shaped cross section with an outline defined by a first arc portion derived from an inner circle, two symmetrical second arc portions respectively derived from a side circle and connecting with said first arc portion, a third arc portion derived from an outer circle, and two tangent lines respectively connecting each of said second arc portions and each end of said third arc portion, an end of each tangent line defined by a corresponding intersection of a single virtual outer circle and the respective second arc portion, and wherein said cross section of said spring is further characterized in that an inner center of the inner circle and a virtual outer center of the virtual outer circle are on a central line with a center distance between said inner center and said virtual outer center, each second arc portion symmetrically disposed on a respective one of two sides of said central line, an outer center of said outer circle also being on said central line; and wherein a side radius of each side circle is larger than a virtual outer radius of said virtual outer circle, said virtual outer radius of said virtual outer circle is larger than an inner radius of said inner circle, and an outer radius of said outer circle is larger than said virtual outer radius of said virtual outer circle.