The utility model belongs to the technical field of
petroleum drilling and production
mechanical equipment, and discloses a vertical transmission chain box with a novel structure. The input shaft and the output shaft are arranged in parallel, and the chain is in vertical transmission. A push disc
clutch is installed at the end of a chain box input shaft
assembly, an inner gear ring is designed to be connected with a
clutch friction disc, meanwhile, a connecting disc is designed to be connected with the inner gear ring and a chain wheel, and rolling bearings are arranged inside and outside the chain wheel. A friction hub is designed at the end of the output shaft, and a pneumatic tire
clutch and a connecting disc are installed outside the friction hub to serve as a reaction torque releasing device. According to the chain box, independent hanging or separation can be achieved through power, and abrasion and equipment loss caused by idle running of the chain are avoided. Meanwhile, the anti-torque release device arranged on the output shaft can release the deformation energy of the
drill rod, the
drill rod cannot rapidly and reversely rotate, and the safety performance of
petroleum drilling equipment is greatly improved.