Weft insertion mechanism of rapier loom

The utility model discloses a weft insertion mechanism of a rapier loom, which relates to the technical field of rapier looms, and particularly comprises a mounting plate, a limit boss is arranged in the middle of one side of the mounting plate, a first gear is arranged on one side of the limit boss, racks are arranged at the top and the bottom of the first gear, the racks are meshed with the first gear, and the rack is meshed with the second gear. Translation plates are arranged on the two sides of the limiting boss and located between the racks and the mounting plate, a reinforcing frame is arranged on the side, away from the mounting plate, of each translation plate and is of a C-shaped design, the reinforcing frames are fixedly mounted on the translation plates, one end of each reinforcing frame is connected with one rack, and the other end of each reinforcing frame is connected with the other rack. And the other end of the reinforcing frame is in sliding connection with the other rack. When in use, the u