Chain tensioning device for ABS inspection bench

An ABS inspection bench chain tensioning device is used for tensioning a chain between a first chain wheel and a second chain wheel and comprises a vertically-arranged guide frame and a chain wheel assembly arranged on the guide frame in a sliding mode, the chain wheel assembly comprises a wheel shaft and a tensioning wheel rotationally arranged on the wheel shaft, and the chain is in transmission connection with the first chain wheel and the second chain wheel. The inner side of the chain bypasses the lower side of the tensioning wheel, the wheel shaft is connected with a balance weight piece through a connecting frame, and the chain can be always kept in a tensioning state under the action of the balance weight piece and the tensioning wheel. Through the arrangement of the chain wheel assembly and the guide frame, the chain can pull the chain wheel assembly to slide on the guide frame according to the change of the center distance between the first chain wheel and the second chain wheel, the tensioning degr