Timepiece movement with a tourbillon fitted with a shock protection device

A timepiece movement including a tourbillon that has a rotating carriage bearing a sprung balance and an escapement, wherein said carriage has a top pivot and a bottom pivot respectively carried by a top bridge and a bottom bridge of the carriage, and said carriage pivots respectively in a lower bearing and an upper bearing between a bottom plate of said timepiece movement and a bridge of said movement, said carriage having an axial shake, wherein said timepiece movement further includes a stop member, arranged for limiting the axial shake of said carriage between the bottom plate and the bridge wherein the stop member is different from the lower and upper bearings and wherein the carriage has an axial engagement length in said upper and lower bearings respectively, wherein the stop member, defines an axial travel of the carriage and wherein said axial travel is shorter than said axial engagement of the carriage in the upper and lower bearings respectively so that said carriage pivots remain engaged in their respective bearing as a consequence of a deformation of a bridge upon a shock.