Bolt anti-loose structure of bearing front cover

The invention belongs to the technical field of railway wagon bearings, and particularly relates to a bearing front cover bolt anti-loosening structure which comprises an anti-loosening piece of a triangular structure, bolt anti-loosening holes are formed in the three vertex angles of the anti-loosening piece, the outer edges of the three vertex angles of the anti-loosening piece extend outwards to form outwards-protruding circular arcs, and when bolts are assembled into the bolt anti-loosening holes, the bolts are clamped into the bolt anti-loosening holes. The outwards-protruding arc is bent inwards to form a bevel face, and the bevel face is matched with the bolt to prevent looseness. The anti-loosening structure can effectively prevent the fixing bolt at the axle end from loosening, facilitates axle fixation during axle maintenance, and is simple in structure and convenient to operate. 本发明属于铁路用货车轴承技术领域，具体涉及一种轴承前盖螺栓防松结构，包括三角形结构的防松片，所述防松片的三个顶角处设置有螺栓防松孔，防松片的三个顶角处的外部边缘向外侧延伸形成外凸圆弧，螺栓装配至螺栓防松孔内时，外凸圆弧向内弯折形成折角面，折角