Adjustment device for drum brake, especially for motor vehicle, has first section of second strut part enclosing spring, whereby first section has opening in cross-section on at least one side

摘要

The device (20) has an extendible adjustment strut (21) acting between two brake shoes (4,5) with a first part (22) with a threaded rod and gear wheel and a second part (26) movable relative to the first that holds the threaded rod and has a control element (24) that interacts with the gear wheel and a spring that biases both strut parts relative to the brake shoes. A first section of the second strut part encloses a spring (28), whereby the first section has an opening in cross-section on at least one side.