Mechanical component of motor vehicle with energy absorption capability

A sill assembly for a motor vehicle includes a hollow bracket, a mechanical component, and a retaining element. The hollow bracket extends in a longitudinal direction of the motor vehicle and defines a cavity. And the mechanical part is arranged in the cavity of the hollow bracket. The mechanical component comprises at least one reinforcing structure extending parallel to the longitudinal direction of the motor vehicle and comprising a strip-shaped profile having a width extending transversely within the cavity. A retaining element is disposed within the cavity of the hollow bracket and is secured to the mechanical component to position the mechanical component within the cavity. Each retaining element has at least one form-fitting element having a shape corresponding to the form-fitting element of the hollow support to inhibit a rotational movement of the mechanical component relative to the hollow support. The retaining element is separate from the hollow bracket. 一种用于机动车辆的门槛总成包括空心支架、机械部件和保持元件。空心支架沿着机动车辆的纵向