Three-lip sealing structure for bearing of sweeping robot

The invention discloses a three-lip sealing structure for a sweeping robot bearing, and relates to the technical field of bearings. The problem that a sealing structure of a bearing used on an existing sweeping robot is poor in sealing performance is solved. A sealing ring of an original deep groove ball bearing is replaced with the sealing structure, the sealing structure is in a contact type sealing mode, specifically, a second sealing lip, a third sealing lip and a first sealing lip are sequentially arranged at the bottom of a bearing rubber pad from left to right, and the included angle c is formed between the axis of the second sealing lip and the axis of the third sealing lip. The included angle d is formed between the axis of the first sealing lip and the vertical horizontal line, due to the fact that sealing is too tight, the friction torque of the bearing is increased, and temperature rise is too fast, the second sealing lip and the third sealing lip are in interference contact, and the sealing perfo