Bike having energy recovery device

A bike having an energy recovery device comprising:

• a drive wheel coupled to a rear wheel drive shaft pulley of the bike and configured to rotate together with a rear wheel of the bike;
• a wire pulled forward when a bike rider operates a wire pulling means;
• a compressor support portion coupled to a rear end of the wire and configured to make a hinge movement about a hinge axis when the wire is pulled;
• a rotary wheel rotatably coupled to the compressor support portion and configured to rotate together with the drive wheel by friction between the rotary wheel and the drive wheel according to a contact between outer circumferential surfaces of the rotary wheel and the drive wheel caused by the hinge movement of the compressor support portion when the compressor support portion is maximally pulled by the wire and to be released from the contact with the drive wheel when a pulling force of the wire is removed;
• a compressor comprising a cylinder coupled to the compressor support portion, a piston arranged in the cylinder to move back and forth, and a connecting rod having a rear end portion joined to the piston and projecting forward through a front hole of the cylinder;
• and
• a connecting cam configured to rotate about a rotary wheel shaft coupled to the rotary wheel and rotatably coupled to a front end portion of the connecting rod at a distance from the rotary wheel shaft so as to rotate together with the rotary wheel and reciprocate the connecting rod forward and backward according to a circular movement of a part of the connecting cam coupled to the connected rod,
• wherein a rear portion of the cylinder comprises an intake port provided with a check valve and an exhaust port,
• wherein air introduced through the intake port is compressed by the movement of the piston and then discharged through the exhaust port to be stored in an air tank through an air hose.