Driving device for driving two door panels to synchronously move

A driving device for driving two door panels to synchronously move comprising:

• a rail rod having two wheels mounted respectively on two ends of the rail rod;
• a cord mounted between and around the wheels on the rail rod, being parallel to the rail rod and adapted to be mounted at a position at inner sides of the door panels;
• and
• multiple clamping assemblies securely connected to the cord, moveable relative to the rail rod and adapted to clamp the door panels, and each clamping assembly comprising
• a front clamping panel adapted to be mounted on an outer side of a corresponding one of the door panels;
• and
• a rear clamping panel adapted to be mounted on the inner side of the corresponding door panel and connected securely to the front clamping panel and the cord, wherein
• each clamping assembly further has
• at least one through hole defined through the front clamping panel of the clamping assembly;
• at least one combining hole defined through the rear clamping panel of the clamping assembly and corresponding respectively to the at least one through hole in the front clamping panel;
• and
• at least one fastener assembly mounted respectively through the at least one through hole in the front clamping panel and the at least one combining hole in the rear clamping panel to securely connect the front and rear clamping panels with each other;
• the rear clamping panel of each clamping assembly further has a cord mount formed on a side of the rear clamping panel opposite to the front clamping panel of the clamping assembly;
• and
• each one of the at least one fastener assembly of each clamping assembly comprises
• a front fastening bolt mounted in one of the at least one through hole in the front clamping panel of the clamping assembly and having a disk head and a threaded shank protruding from the head and mounted through a corresponding through hole;
• a rear fastening bolt mounted in one of the at least one combining hole in the rear clamping panel of the clamping assembly and having
• a disk head;
• and
• a threaded shank protruding from the head, mounted through a corresponding combining hole and having
• a free end;
• a threaded hole defined in the free end and screwed with the threaded shank of the front fastening bolt;
• and
• an outer thread formed around the threaded shank of the rear fastening bolt;
• and
• a front securing nut mounted on the front clamping panel of the clamping assembly at a side facing the rear clamping panel of the clamping assembly and mounted around and screwed with the outer thread on the threaded shank of the rear fastening bolt;
• and
• a rear securing collar mounted around the threaded shank of the rear fastening bolt.