Slide bearing is with preventing negative pressure seal structure

The utility model discloses a slide bearing is with preventing negative pressure seal structure, including end cap bearings, the pivot setting in end cap bearings, end cap bearings's tip has axial extension portion, outside radial connection limit of extending has on the lateral wall of axial extension portion, female ring plug bush in axial extension portion and the card put on the outer wall of axial extension portion, two at least protruding ring have on the right -hand member face of female ring, the annular groove has before two protruding ring, be fixed with public ring in the pivot, the left end mask of public ring has at least two to connect protruding ring, it has the go -between connected in star to connect for two between the protruding ring, the connection protruding ring plug bush in the outside of public ring is in the annular groove, the protruding ring plug bush of the inboard of female ring is in the go -between connected in star. The air current that it made the pressure differential formation that the motor is inside and the bearing is inside is weakened or even is offset under the interact of the female ring of public ring sum, the effectual emergence that prevents the bearing oil leak, and its simple structure, effect are showing, safe and reliable.