Dual-power assisted brake apparatus

The utility model relates to an external contracting brake apparatus for a pumping unit, in particular to a dual-power assisted brake apparatus. The dual-power assisted brake apparatus is characterized by the inclusion of a front dog-tooth welding seat and a rear dog-tooth welding seat which are connected together through a turnbuckle screw rod, wherein front dog-teeth are arranged on the front dog-tooth welding seat, rear dog-teeth fitted with the front dog-teeth are arranged on the rear dog-tooth welding seat, a rotating handwheel is installed at the left end of the turnbuckle screw rod, and a movable wrench clamping seat is arranged between the rotating handwheel and the rear dog-tooth welding seat. The utility model has the benefits that the dual-power assisted brake apparatus is small in volume, light in weight and high in security and portable, integrates the advantages of braking of the brake block and the dowel pin into a whole, and is firm due to the design of the internal and the external dog-teeth