DEVICE FOR THE CONTROL OF A SAFETY FREE WHEEL COUPLING FOR A MOTOR VEHICLE

摘要

A device for the control of a free wheel coupling for a motor vehicle comprises a lock (27) mounted slidingly in a bell (8) integral with the driving shaft (2a) engageable in a cage (12) provided with rollers (24) and oscillatingly mounted in the bell (8) between two limit positions on which the rollers (24) and the bell (12) and in bearing relationship and provide for the rotation coupling of the driving shaft (2a) and the driven shaft (2b), the lock (27) maintaining the cage (12) between a medium position wherein the driven shaft (2b) is idle and one of the limit positions. When in forward gear and outside braking phases, an electromagnet (31) draws the lock (27) in the cage (12). From a predetermined speed, a safety system recouples automatically the driving and driven shafts.