Automatic chain tensioning adjusting mechanism

The utility model relates to the technical field of chain transmission, in particular to an automatic chain tensioning adjusting mechanism which comprises a fixing plate, one side of the fixing plate is used for being fixedly mounted with equipment, a mounting block is fixed to the other side of the fixing plate, an adjusting block is arranged outside the mounting block, and the adjusting block is fixed to the fixing plate. A sliding groove is formed in the side wall of the adjusting block in the length direction in a penetrating mode, the installation block is in sliding fit with the sliding groove and used for abutting against a chain, a spring is installed in the sliding groove, one end of the spring is fixedly connected with the side wall of the adjusting block, and the other end of the spring is fixedly connected with the side wall of the installation block. And the elastic force direction of the spring is the same as the sliding direction of the adjusting block. The chain transmission mechanism has the