Mechanical locking mechanism for automobile door lock

The invention relates to an automobile door lock mechanism, in particular to a mechanical locking mechanism for an automobile door lock and belongs to the technical field of automobile door locks. The mechanical locking mechanism comprises a bottom plate, a lock body, a sliding plate, a locking stirring block, a locking stirring block fixing shaft, a sliding plate return spring, a ratchet wheel fixing shaft, a linkage plate, a pawl, a pawl fixing shaft, a ratchet wheel and a cover plate. The bottom plate is connected with the lock body through a bolt. The lock body is internally provided with the linkage plate, the pawl and the ratchet wheel. The lock body is connected with the cover plate through a bolt. The locking stirring block fixing shaft is fixed to the cover plate. The locking stirring block fixing shaft is rotationally connected with the locking stirring block, and the locking stirring block has a locking position and an unlocking position. The mechanical locking mechanism for the automobile door lock is simple, compact and reasonable in structure, the locking function and the unlocking function can be achieved by stirring the locking stirring block, reliability is high, and the service life is long. The mechanical locking mechanism is suitable for being installed in the lock body with small installation space, and a traditional mechanical lock body structure is greatly promoted to develop to be exquisite.