FIELD: railway transport; railway car parking brakes. SUBSTANCE: parking brake for railway car has brake cylinder, housing and rod of this cylinder being hinge-coupled with horizontal levers of brake rigging. Brake cylinder rod locking unit is also provided which includes stem engaging with brake cylinder rod and coupled with lock. Novelty is that lock consists of four sectors radially moving under action of springs and engaging with stem through ring recesses. Housing of locking unit accommodates with cup engaging through spring with sleeve which lock by its conical section, sectors of lock, thus preventing their spontaneous radial displacement. EFFECT: improved safety owing to reliable holding of cars at any slopes at any condition of train brake mains. 1 dwg
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