Mechanism capable of changing distance of jig

The utility model discloses a mechanism capable of realizing jig pitch change, which comprises a bottom frame, a plurality of jig plates arranged above the bottom frame and an air cylinder arranged below the bottom frame, a plurality of cam followers are arranged on two sides of each jig plate, any two adjacent jig plates are movably connected together through a pull ring, and the air cylinder is arranged below the bottom frame. One end of the pull ring is movably connected with the jig plate through the cam follower, and the other end of the pull ring is fixedly connected with the jig plate. The device is composed of the bottom frame, the air cylinder, the guide rail, the sliding block, the pull ring, the cam follower, the jig plates and the oil pressure buffer, the jig plates slide on the guide rail through stretching of the air cylinder, the distance of each jig plate can be changed, the working efficiency is improved, the guide rail sliding block is used for guiding, each jig plate is provided with the pu