Pure mechanical automatic tensioning apparatus for parking and braking of vehicle

The invention discloses a pure mechanical automatic tensioning apparatus for parking and braking of a vehicle. The apparatus comprises a vehicle brake mechanism and further comprises a base, a rotarypin shaft is installed on the base, and a fixed wheel disc and a driving gear are assembled on the rotary pin shaft; a driving mechanism matched with the driving gear is arranged in the base, the position of the driving mechanism is fixed through a locking arm, and after the locking arm releases the fixation of the driving mechanism, the driving mechanism drives the gear to rotate so as to drive the fixed wheel disc to rotate through the rotating pin shaft, the fixed wheel disc rotates to pull a braking kicking pull rope to complete braking of the vehicle on one hand and drive a braking handleto be lifted on the other hand and drive a pawl to change the meshing position with a ratchet wheel so as to achieve braking locking; and after a driver leaves from a main driving seat, the main driving seat rises, so that th