Bottom belt chain non-return locking device

The utility model relates to a non-return locking device for a bottom belt chain, which belongs to the field of cigarette shred storage cabinets, is mounted on the bottom belt chain and comprises a base, a tensioning wheel, a pull rod and an elastic sheet, the base is provided with a cavity for accommodating the elastic sheet, the elastic sheet is fixedly connected with the pull rod, and the pull rod penetrates through the side wall of the cavity in a sliding manner. A tensioning wheel is installed at the end of the pull rod in the direction opposite to the rebounding direction of the elastic piece, the tensioning wheel is meshed with the bottom belt chain, and a one-way rotating shaft sleeve piece is further installed between the tensioning wheel and a rotating shaft of the tensioning wheel. The bottom belt chain tensioning device is installed on a bottom belt chain of the cut tobacco storage cabinet and used for tensioning and stopping the bottom belt chain and preventing the bottom belt chain from swinging