| 摘要 |
<p>A spring member comprises an encircling collar (9) to be fixedly engaged to a railway truck (3), a core (10) disposed coaxially in the collar (9) and designed to be engaged to the truck axle (6), as well as an elastic ring (11) made of rubber and fixed, through a rubber-metal bond, between the collar (9) and the core (10). Along one horizontal direction (X-X) the collar (9) exhibits a greater extension than the extension detectable along a second horizontal direction (Y-Y) perpendicular to the first direction (X-X), so that the spring member (1) offers different stiffness coefficients in the two directions (X-X) and (Y-Y). The perimetric extension of collar (9) is substantially defined by one pair of simmetrically-disposed curvilinear portions (16a) connected to a second pair of curvilinear portions (16b) having a wider bending radius than the portions of the first pair. <IMAGE></p> |
