Clamping device in timber drilling

The clamping device comprises a base table, supporting legs are fixedly connected to the lower side of the base table, a rack is fixedly connected to the upper side of the base table, and a telescopic mechanism is rotationally connected to the rack; a vertical plate is fixedly connected to the base table, two fixing plates are fixedly connected to one side of the vertical plate, and through holes are formed in the fixing plates at equal intervals. A rotating plate is rotationally connected into the through hole through a pin, the upper side of the rotating plate is rotationally connected to the telescopic mechanism, a first arc-shaped groove is formed in the lower side of the rotating plate, and a buffer layer is fixedly connected into the first arc-shaped groove; a threaded rod is rotationally connected to the vertical plate through threads, and a baffle is fixedly connected to one end of the threaded rod; second arc-shaped grooves are formed in the upper surface of the base. According to the scheme, the sec