Groove body pitch changing device

The invention belongs to the technical field of variable-pitch grabbing instruments, and discloses a groove body variable-pitch device. The device comprises a support body, a connecting cross rod is erected in the support body, the connecting cross rod is slidably sleeved with a suction cup mounting plate, the suction cup mounting plate can suck a target object, the support body comprises a side plate, a driving device is mounted on the side plate, the driving device is connected with a driving plate, and the driving device can drive the driving plate to reciprocate perpendicular to the horizontal plane; the groove body distance changing device comprises at least one set of groove plate bodies, the groove plate bodies are arranged on the outer side of the support body in the length direction, the groove plate bodies are detachably connected with the driving plate, sliding grooves are formed in the groove plate bodies, the sliding grooves comprise moving areas, protruding parts are arranged on the suction cup