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We use the trundle bearing should pay attention

2019-07-02

What is the composition of the rolling bearing

A rolling bearing is a precision mechanical component that changes the sliding friction between the running shaft and the shaft seat into rolling friction, thereby reducing friction loss. The rolling bearing is generally composed of an inner ring, an outer ring, a rolling body and a cage. The inner ring is matched with the shaft and rotates together with the shaft; the outer ring acts to cooperate with the bearing seat to support the rolling body; The rolling element is evenly distributed between the inner ring and the outer ring, and its shape and quantity directly affect the service performance and life of the rolling bearing; the cage can evenly distribute the rolling elements, prevent the rolling elements from falling off, and guide the rolling elements Rotate for lubrication.


Rolling bearings vary greatly in structure due to their use and working conditions, but the basic structure consists of four parts: the inner ring, the outer ring, the rolling elements (steel balls or rollers) and the cage.


(1) Outer ring (also known as outer casing or outer ring). It is usually fixed to the housing of the bearing housing or machine to support the rolling elements. There are also grooves on the inner surface of the outer ring for the rolling of steel balls or rollers, called inner grooves or inner races.


(2) Inner ring (also known as inner or inner ring). Usually fixed to the journal, the inner ring rotates with the shaft. The outer surface of the inner ring has a groove for rolling a steel ball or a roller, which is called an inner groove or an inner race.


(3) cage (also known as retainer or isolator). The rolling elements in the bearing are evenly spaced from one another such that each rolling element rolls normally between the inner and outer rings. In addition, the cage has the function of guiding the rolling elements, improving the lubrication conditions inside the bearing, and preventing the rolling elements from falling off.


(4) Rolling elements (steel balls or rollers). Each set of bearings is equipped with one or several sets of rolling elements, which are installed between the inner ring and the outer ring, and play the role of rolling each transmission force. Rolling elements are load-bearing parts whose shape, size and number determine the ability of the bearing to withstand loads at high speeds.


In the thrust bearing, the ferrule that cooperates with the shaft is called a shaft ring, and the ferrule that cooperates with the bearing seat or the machine housing is called a seat ring, and the shaft ring and the seat ring are collectively referred to as a washer. In addition to the above four parts, bearings of various structures have other parts that match them. For example, rivets, dust caps, seals, retaining washers, retaining rings, and adapter sleeves.


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