Novel extractor for piston in brake assembly

The utility model relates to the technical field of piston extractors, and discloses a novel brake assembly inner piston extractor which comprises a lock cylinder, the bottom end of the lock cylinder is connected with a piston, the inner side of the lock cylinder is connected with an inner lead screw through threads, one end of the inner lead screw is fixedly connected with a sealing ring, and one end of the sealing ring is fixedly connected with an outer lead screw. The other end of the inner lead screw is fixedly connected with a conical column, four lock holes distributed in an annular array mode are formed in the outer wall of the lock cylinder and communicate with the interior of the lock cylinder, locks are slidably connected into the lock holes, and a groove is formed in the inner wall of the piston. According to the technical scheme, the brake piston can be easily taken out through the special lock type mechanical brake piston taking-out device, manufacturing enterprises or equipment using enterprises