Torque overload protection device

The utility model belongs to the technical field of mechanical transmission, and relates to a torque overload protection device which comprises a first shaft and a second shaft which are coaxially and oppositely arranged. An overload protection assembly is arranged between the first shaft and the second shaft and comprises a first disc body, a second disc body and balls, wherein the first disc body and the second disc body are oppositely arranged, and the balls are arranged between the first disc body and the second disc body. The first disc body is fixedly connected with the first shaft; the second disc body is connected with the second shaft; a plurality of ball sockets are arranged on the opposite end surfaces of the first disc body and the second disc body; a ball is arranged in each ball socket; an annular groove is formed in the end face, opposite to the first disc body, of the second disc body. One end of the ball is located in the ball socket and the other end is located in the annular groove; torque