Balancing body driving device

The utility model relates to a gearing of a ray blocking body and a balancing body, and belongs to an assistance device of a Cobalt-60 treatment machine and belongs to the medical device technology field. The utility model comprises a fixed body and a connection piece; the fixed body is fixed on a turning disc, an installation slot for a mobile box is equipped on the fixed body, trolley slots are positioned at the left and right sides and the bottom of the installation slot for the mobile box, the trolleys on the mobile box is arranged in the trolley slot, the fixed body is equipped with racks, and a motor and a reducer which are connected mutually are arranged on the mobile box, gears connected with an output shaft of the reducer meshes with the racks, the mobile box and the ray blocking body are fixed and . The structure is compact, the transmission is stabile and the performance is reliable, the balancing body can be served as the ray blocking body, not only is applied to make the counterweight balance, but also is blocked off the ray and avoided ray hazards, thereby the utility model can be spread to apply to other radiotherapy equipments.