Double frame brake drum brake drum body by the helical ribs or vertical ribs and annular rib components. In reducing the wall thickness of the brake drum body, based on the surface of the brake drum spiral reinforcement ribs or vertical ribs, and increase in its outer annular rib, guarantee annular reinforcing ribs between the body and the brake drum 6mm --- 10mm gap.

Brake drum during use, the temperature rises to 300 ℃, the mechanical properties decreased significantly, the brake drum thermal fatigue has been a major cause of failure. To improve heat dissipation, ensuring the premise of the mechanical properties of the brake drum, increase the surface area of the brake drum. 300 axle brake drum, for example, improve the structure of the surface area of the front brake drum is 0.965 square meters, after improved to 1.264 square meters, an increase of 31%, while reducing the wall thickness of the brake bulging body, help spread the heat.

heat.

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