High-speed and high-load hub bearing unit and assembling method thereof

The invention discloses a high-speed high-load hub bearing unit and an assembling method thereof. The high-speed high-load hub bearing unit comprises a body, wherein the body is provided with a bearing sleeve, an inner flange plate arranged at the front end of the bearing sleeve, and a fixing plate fixedly connected to the outer side wall of the rear end of the bearing sleeve; positioning holes and mounting holes are distributed in the circumference of the inner flange plate at intervals; connecting screw rods are arranged in the mounting holes; the outer side of the bearing sleeve is sleevedwith a reinforcing sleeve; the reinforcing sleeve is located between the inner flange plate and the fixing plate; the fixing plate is provided with a clamping assembly; and the clamping assembly clamps the reinforcing sleeve, so that the reinforcing sleeve clamps the outer side wall of the bearing sleeve. The method comprises the following steps of a, preparing before assembling; b, clamping; c, assembling the reinforcing