Transmission chain tensioning adjusting mechanism

The utility model discloses a transmission chain tension adjusting mechanism which comprises two sets of driving plates, positioning strips are fixedly installed on the opposite faces of the two sets of driving plates, linkage seats are connected to the opposite faces of the two sets of positioning strips in a sliding mode, and back plates are fixedly installed on one sides of the two sets of driving plates. Front plates are fixedly mounted on the other sides of the two driving plates, and limiting rollers are fixedly mounted on the front face and the back face of the linkage base. Through the limiting rebound resilience of the damper and the extension spring, the rebound resilience of the telescopic activity of the linkage seat and the adjusting rod can be increased, the pressure influence of the linkage seat when the linkage seat slides under pressure is reduced, and the linkage seat can be flexibly adjusted by limiting the activity of the linkage seat and assisting the sliding of the linkage seat through t