Patent ID: 7213663

Claim:
A driving device of a robot cleaner comprising: a robot cleaner body; a pair of motors disposed in the robot cleaner body and driven by respective power supplies; a pair of driving wheels rotating by the pair of motors; a pair of driven wheels following the pair of driving wheels; a driving force transmitting means causing the driving wheels and the driven wheels to move in association with each other; a frame unit disposed in the robot cleaner body to support the pair of driving wheels and the pair of driven wheels; and a shock-absorbing unit disposed in the frame unit to absorb shock occurring from a cleaning surface, the shock-absorbing unit comprising: an upper supporting member, a lower supporting member corresponding to the upper supporting member, and an elastic member disposed between the upper supporting member and the lower supporting member; wherein the shock-absorbing unit further comprises a unit shaft penetrating through the upper supporting member, the elastic member, and the lower supporting member.