Hollow encoder with steel ball positioning function

The utility model belongs to the technical field of encoders, and particularly relates to a hollow encoder with steel ball positioning, which comprises a hollow encoder main body, a mounting buckle arranged at the edge of the hollow encoder main body, a support arranged at the upper end of the hollow encoder main body, an upper cover plate arranged on the inner side of the upper end of the support, and a bottom plate arranged on the upper surface of the hollow encoder main body. A through hole is formed in the inner wall of the bottom plate, the support comprises a tooth valley, a clamping hole, a buckle and an insertion hole, the tooth valley is fixedly installed in the support, the clamping hole is fixedly installed in the inner wall, close to the edge, of the support, the buckle is fixedly installed in the inner wall of the clamping hole, and the insertion hole is fixedly installed in the inner wall, close to the center, of the support. When the hollow encoder main body is used, the position of the elastic