Novel linear transmission mechanism

The utility model relates to the technical field of automobile metal plate riveting, in particular to a novel linear transmission mechanism which comprises a connecting block, a first inner transmission rod and a second inner transmission rod, the connecting block is fixedly connected with the first inner transmission rod, the first inner transmission rod is fixedly connected with the second inner transmission rod, and a flexible force transmission component is installed on the connecting block in a sliding mode. A sliding cavity is formed in the connecting block, and the end of the connecting block is provided with a front end execution block in a communicating mode. The flexible force transmission component is slidably mounted on the connecting block, pre-tightening force can be generated through the flexible force transmission component, the pre-tightening force is transmitted to the front-end execution block through the sliding cavity, the pre-tightening force can pre-tighten a metal plate before the inne