Miniature bearing cover capable of preventing high-temperature fracture

The utility model provides a miniature bearing cap capable of preventing high temperature fracture, which comprises a bearing cap main body, a protective outer pad, a transition ball and a locking ring, and the protective outer pad is arranged on the upper surface of the bearing cap main body. Before the bearing cover is used, lubricating grease is injected into the lubricating grease cavity from the grease injection hole, then escapes to the grease guide groove through the lubricating grease cavity and flows out of the lubricating grooves through the grease guide groove, and the lubricating grease flowing out of the lubricating grooves distributed in the circumferential mode at equal intervals enables the lubricating grease to flow to the lower surface of the bearing cover body. A plurality of transition balls are installed between the bearing cover body and the external miniature bearing body, lubricating grease can flow to the inner sides of the second arc-shaped grooves through lubricating grooves so that