Pneumatic brake device for blank cutter

The utility model relates to a pneumatic brake device for a blank cutter, which comprises a rack (13), and a motor (4) and a speed reducer (12) which are fixed on the rack (13), wherein the speed reducer (12) is in transmission connection with the motor (4) via the belt pulley (15) of the speed reducer, which is arranged at one side of the speed reducer (12), and a brake wheel (7) which is coaxial with the belt pulley (15) of the speed reducer is also arranged at the other side of the speed reducer (12); a cylinder (2) and a support plate (11) are also installed on the rack (13), and a drop bolt (9) is installed on the support plate (11); and a rigid brake belt (5), the two ends of which are respectively connected with the cylinder (2) and the drop bolt (9), passes by the brake wheel (7). Through the control of the cylinder, the rigid brake wheel can lift and descend, the rigid brake wheel is attached with the brake wheel to generate friction force when descends, so synchronous brake of the motor and the spee