Variable-diameter wedge block type anti-slip self-locking bracing device applicable to TBM (tunnel boring machine)

The utility model discloses a variable-diameter wedge block type anti-slip self-locking bracing device applicable to a TBM (Tunnel Boring Machine), and belongs to the technical field of inclined shaft tunnel boring machines. The device comprises a main beam and is characterized in that the left side and the right side of a middle shaft of the main beam are respectively connected with a main sliding mechanism, the main sliding mechanisms can slide in the axial direction of the main beam, and the upper side of each main sliding mechanism is connected with a main sliding driving mechanism; the side, away from the main beam, of each main sliding mechanism is slidably connected with an auxiliary sliding mechanism, the auxiliary sliding mechanisms can slide along the sides, away from the main beam, of the main sliding mechanisms, and each auxiliary sliding mechanism is connected with a linkage mechanism. The side, away from the main beam, of each linkage mechanism is connected with a supporting shoe. The device is