Elastic joint of robot

The utility model discloses an elastic joint of a robot. A rotating shaft is fixed with the upper surface of a lower bottom plate. The other end of the rotating shaft penetrates through a through hole in an upper panel to be connected with a driving wheel. A partition plate is arranged between the upper panel and the lower bottom plate. The non-protruding end of a first sliding block and the non-protruding end of a second sliding block are fixed on the inner surface of a right side plate. The protruding end of the first sliding block and the protruding end of the second sliding block are embedded in one end of a first spring and one end of a second spring respectively. An annular protrusion on one side of the partition plate is sleeved with the other end of the first spring and the other end of the second spring. A third spring and a fourth spring are arranged in the same way. The non-protruding end of a third sliding block and the non-protruding end of a fourth sliding block are fixed on the upper panel and the lower bottom plate. One end of a first screw rod sequentially penetrates through a middle through hole of the fourth sliding block, a middle through hole of the annular protrusion of the partition plate and a middle through hole of the first sliding block, and then is connected with the right side plate. The other end of the first screw rod penetrates through a first worm gear and then is connected with a left side plate through a bearing. A second screw rod is arranged in the same way. A worm penetrates through one of bevel gears, and then the two ends of the worm are connected with the first worm gear and a second worm gear respectively. The other bevel gear is connected with an output shaft of a motor. The elastic joint of the robot is simple and practical.