Heavy truck battery replacement battery pack and battery bracket locking mechanism and heavy truck battery replacement battery pack

The utility model provides a heavy truck battery pack and battery bracket locking mechanism and a heavy truck battery pack. Comprising a frame base, locking mechanisms are arranged on the frame base in pairs, the pair of locking mechanisms are symmetrical in the axial direction of a frame, and a power unit and a locking unit are further included; the locking unit comprises a pressing piece and a pressure applying part; the bottom end of the pressing piece is hinged to the right side of the power unit, the pressure applying part is arranged on the front side of the pressing piece, the pressing piece can swing forwards, and the pressure applying part presses the bracket; the power unit comprises a linear motion part and a support frame; the middle of the linear motion part is hinged to the left end of the supporting frame, and the top end of the linear motion part is hinged to the rear end of the pressing piece. The top end of the linear motion part can stretch outwards, and the linear motion part is self-locke