Transmission bearings are mechanical components composed of an eccentric mechanism, an internal gear ring, and a transmission ring located between the two. They are made of medium carbon quenched and tempered steel and are mainly used to support mechanical rotating bodies, reduce the coefficient of motion friction, and ensure rotational accuracy. According to their frictional properties, rolling bearings can be divided into rolling bearings and sliding bearings. Rolling bearings consist of an outer ring, an inner ring, rolling elements, and a cage. The difference in rolling element shape forms two major categories: ball bearings and roller bearings.
The variable speed transmission bearing integrates support and variable speed functions, and achieves fixed transmission ratio reduction through components such as irregular bearings and double eccentric sleeves. This bearing is widely used in port lifting equipment. For example, Shanghai Zhenhua Port Machinery uses 223XX series self-aligning roller bearings to compensate for installation errors in gantry cranes, while 422XX series cylindrical roller bearings bear high-speed radial loads. Daily maintenance needs to focus on monitoring lubrication status and pollutant protection
