Duo servo drum brake with high braking moment - has pretensioned spring connecting brake shoe to support bearing

摘要

The spring force of the pretensioned spring (12) counteracts the expanding force of the expanding device and is greater than the operating force required to place the brake shoes (2, 3) against the brake drum by the operating lever (11). The spring (12) is pref. mounted parallel to a retraction spring (8) connecting the brake shoes and is suspended in the brake plate connected to the support bearing (7). <USE/ADVANTAGE> - for duo servo drum brakes,without impairing the brake shoe movement.