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US 2002/0162711 A1Published application
Drum brake system
AssigneeRobert Bosch GmbH
InventorsDietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
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AssigneeRobert Bosch GmbH
InventorsDietmar Baumann, Hanniel Schmidt, Herbert Vollert, Frieder Keller
Estimating the term…
The invention relates to a drum brake device (10), which is provided as a wheel brake for a motor vehicle. The invention proposes embodying the drum brake device (10) with a brake belt (14), which is disposed inside a brake drum (12) and can flex in the radial direction of the brake drum (12). Thrust exerted on one end (18) of the brake belt (14) with a simultaneous bracing of the other end (20) of the brake belt (14) causes the brake belt (14) to be pressed against the brake drum (12) from the inside and produces a braking moment. The invention has the advantage that a friction force exerted on the brake belt (14) by the brake drum (12) augments the thrust on the end (18) of the brake belt (14) and thus boosts the braking moment. Another advantage is that the brake belt (14) always rests uniformly against the brake drum (12) over its entire circumference, even, for example, when the brake drum (12) expands due to heating.
A drum brake device with a brake drum, characterized in that the drum brake device (10) has a brake belt (14), which is disposed inside the brake drum (12) and can flex in the radial direction of the brake drum (12), and in order to actuate the drum brake device (10), this brake belt (14) can be pressed against the brake drum (12) from the inside by a thrust approximately in the circumference direction exerted on one end (18, 20) of the brake belt (14).
Dependencies are inferred from the claim text.