FIELD: transport engineering; vehicle brakes.
SUBSTANCE: invention relates pneumatic diaphragm brakes for vehicles. Proposed drive of spring brake contains sealed housing with spring chamber and pressure, and hollow drive rod arranged in drive of spring brake for travel along axle to set parking brake into operation. Drive of service brake includes working pressure chamber to set service brake into action. Adjusting valve of brake drive system includes valve housing which can be arranged inside hollow drive rod. Valve housing is provided with hole for communication of drive and working pressure chamber of service brake through hollow drive rod. Adjusting valve includes diaphragm made of elastic material and provided with through vent hole. Diaphragm is arranged inside hole of valve housing and is designed for sealing the holes, except bent hole, when diaphragm is not exposed to pressure of fluid medium exceeding threshold level.
EFFECT: improved technical characteristics of drive.
22 cl, 6 dwg
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