Genuine ATE parking brake cables
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Mode of operation of the mechanical parking brake The task of a parking brake is to prevent the vehicle from rolling away. Conventional systems are operated mechanically by a hand or foot lever and a cable. The majority of parking brakes act on the rear axle. Depending on the vehicle design and requirements of the automotive manufacturer, various versions of parking brake are available:
Operation of caliper-style parking brake In the case of parking brakes designed as a fixed caliper with caliper-style parking brake attached, the brake cable or brake linkage (17) acts on the operating lever (16). The latter is mounted on a shaft with an eccentrically located radius seat (17). The thrust piece (29) is seated here. This pushes the drive spindle (14) and thus the piston (13) and the brake pad (11) against the brake disc when the parking brake is operated. If the parking brake is operated further, the clearance S1 is overcome by elastic deformation of the brake disc along with the wheel bearing play. The brake disc (10) is thus pressed against the brake pad (7). This, in turn, is prevented from returning by the piston (5) and the automatic adjustment mechanism. The contact pressure of the brake pads (11) and (7) and the brake force thus increase simultaneously. When the parking brake is released, the operating lever returns to its starting position. An external spring helps it to do so. At the same time, the thrust piece is pushed back into its starting position by the compression spring (26). The parking brake is thus released.
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