Boltless connection device for upper and lower modular beams of steel structure modular building

A boltless connection device for upper and lower modular beams of a steel structure modular building, comprising a modular beam reinforcement structure, one or more large gears, one or more pinion gear bolts, elongated pressure blocks, a gear sliding plate and a push-pull sliding plate;

• wherein the modular beam reinforcement structure is a monolithic C-shaped channel structure, and two symmetrically arranged sliding grooves are provided on a side surface of the monolithic C-shaped channel structure;
• wherein large gears are arranged oppositely on an inner side surface of the modular beam reinforcement structure, are connected to the modular beam reinforcement structure by bolts, and are symmetrically distributed on the modular beam reinforcement structure;
• wherein the pinion gear bolts are arranged at upper and lower relative positions of the modular beam reinforcement structure, and are symmetrically arranged on the modular beam reinforcement structure, the pinion gear bolts are connected to the modular beam reinforcement structure in a threaded manner, and form a gear transmission fit with the large gears;
• wherein two elongated pressure blocks are provided, and each is fixedly connected to the symmetrically arranged pinion gear bolts by upper and lower through bolts, and the two elongated pressure blocks are relatively moved under a drive of the pinion gear bolts;
• wherein the gear sliding plate and the push-pull sliding plate are arranged on both sides of a side surface of the modular beam reinforcement structure, respectively, the push-pull sliding plate is slidably connected to the sliding groove of the modular beam reinforcement structure, the gear sliding plate and the large gear form a gear transmission fit, and the gear sliding plate and the push-pull sliding plate are fixedly connected by bolts;
• wherein the large gear and the pinion gear bolt are fitted through the gear transmission, and a diameter of the large gear is larger than a meshing end diameter of the pinion gear bolt to form a reduction transmission structure;
• wherein the upper and lower surfaces of the inner side of the modular beam reinforcement structure are provided with inward threaded grooves corresponding to positions of the pinion gear bolts, and a bolt end of the pinion gear bolt is matched with the threaded grooves in a threaded manner, to rotate and drive the elongated pressure block to extrude to a middle part of the modular beam;
• wherein an axial displacement compensation space is arranged inside the large gear, so that when the pinion gear bolt drives the elongated pressure block to move, a displacement deviation is generated without failure.