Clamp for calibrating angular displacement sensor

The invention belongs to the field of metering calibration, and particularly relates to a clamp for calibrating an angular displacement sensor. The clamp consists of a shaft bracket, a frame body for fixing the angular displacement sensor, a regular polygon prism body and two positioning screws, and is characterized in that a rotating shaft of the shaft bracket penetrates through a top plate of the frame body and a through hole of a lifting layer to be connected with a top rotating shaft sleeve of the angular displacement sensor; the angular displacement sensor is placed in the frame body, connected with a through hole in the center of a bottom plate of the frame body through a boss at the bottom of the angular displacement sensor and positioned through two positioning screws on the top plate, and the regular polygonal prism is placed between an upper baffle of the shaft bracket and a lower baffle of the stepped shaft. Through close fit of a center hole of the regular polygonal prism, a main shaftof the shaft