Traction reducer system for e.g. parking brake device, has gear pairs located inside crown wheels and comprising coaxial gears, where gears of each gear pair are engaged in teeth of wheels, respectively

摘要

The system has two coaxial crown wheels (5, 6) centered on an axle (4) and comprising internal toothed surfaces parallel to the axle and external surfaces with hooking systems located close to the axle. Gear pairs (11A, 11B) are located inside the wheels and comprise respective coaxial gears (11a1, 11a2, 11b1, 11b2) integrated between them by rotation. The gears of each gear pair are engaged in teeth of the wheels respectively. The gear pairs are jointly displaced along the toothed surfaces.