Double-crankshaft engine

A dual-crankshaft engine, comprising:

• a cylinder, a cylindrical block and a piston capable of linearly reciprocating in the cylinder, wherein
• two crankshafts provided in parallel are arranged on two sides of the cylinder, and a connection rod is hinged between crank pins corresponding to the two crankshafts to form a double-crank mechanism;
• the cylindrical block comprises a block portion forming the cylinder and a crankshaft support portion for containing and supporting the double-crank mechanism;
• a piston head is provided on a top end of the piston;
• a neck portion is provided on a lower end of the piston head;
• a piston guiding rod is provided on a lower end of the neck portion;
• a slot is provided on the piston guiding rod;
• the connection rod is slidably inserted into the slot;
• a piston rod guiding groove matched with the piston guiding rod is provided in the cylindrical block;
• a lower end of the slot is open and is provided with a piston end cover;
• the piston end cover and the piston guiding rod are detachably and fixedly connected;
• the piston is a non-skirted piston with a piston guiding end separated from a piston sealing end;
• the piston sealing end comprises the piston head;
• the piston guiding end comprises the piston guiding rod and the piston rod guiding groove;
• a plurality of cylinders are provided;
• the plurality of cylinders are arranged in a row or two rows opposing each other;
• amounts and positions of a plurality of pistons, a plurality of connection rods, a plurality of guiding rods, and a plurality of crank pins on each crankshaft correspond to amounts and positions of the cylinders;
• the connection rod comprises a connection rod main body located in the slot connection rod semicircular covers are mounted at two ends of the connection rod main body;
• the connection rod semicircular covers and the connection rod main body are detachably and fixedly connected to a hinge portion of the crank pins;
• an upper edge and a lower edge of the connection rod main body contacting the slot are provided with a wear-resistant layer respectively.