What are the Main Structures and Properties of Joint Bearings?

Joint bearings are spherical sliding bearings. It is mainly composed of an inner circle of an outer sphere and an outer circle of an inner sphere. According to its type and structure, it can withstand radial load, axial load or combined load of radial and axial simultaneous action. Because the spherical sliding joint surface of joint bearings is large and the inclination angle is large, and most joint bearing parts adopt special process treatment methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, padding, spraying, etc., it has greater load and impact resistance, and has corrosion resistance, wear resistance and self-alignment. The characteristics of good lubrication or self-lubrication anti-fouling substances can work normally even if the installation is misaligned. Therefore, it is widely used in low-speed swing, tilt motion and rotational motion.

The main structural types are:

1. Radial spherical plain bearings

The inner and outer rings of single-slit outer ring radial spherical plain bearings have a large sliding contact surface, so they have a large load capacity and can withstand radial loads and small axial loads in either direction. This kind of bearing has good lubrication, wear resistance and corrosion resistance.

2. Angular contact spherical plain bearings

Angular contact spherical plain bearings can withstand radial loads and axial loads in any direction or radial and axial joint loads, and their axial bearing capacity increases with the increase of the contact angle. It has good lubrication performance and its inner and outer rings can be separated.

3. Thrust spherical plain bearings

Thrust spherical plain bearings can withstand a one-way axial load, or radial and axial joint loads. Its axial bearing capacity increases with the increase of the contact angle. When the contact angle is equal to 90, it can withstand pure axial loads. The seat ring and the shaft ring can be separated and the lubrication performance is good.

4. Rod end joint bearing

Rod end joint bearings can withstand radial loads and axial loads less than or equal to 0.2Cr in either direction. The rod end is a threaded stick. The thread is divided into internal, external, left and right screws. It is composed of centripetal joint bearings and rod end bodies. It has the advantages of large load capacity, convenient assembly and disassembly, and simplified mainframe structure. It is widely used in various construction machinery and vehicle control and transmission mechanisms. It is an important mechanical basic supporting kit. . When choosing, you should recognize whether it is an internal thread or an external thread, whether it is left or right (right screw is not marked).

5. Self-lubricating joint bearings

The outer ring sliding contact surface of self-lubricating joint bearings is lined with self-lubricating materials. There is no need to add lubricant at work. It has the characteristics of no lubricating dirt pollution. It is especially suitable for environments where lubricants cannot be added at work or are afraid of lubricants pollution due to installation location restrictions. Such are mainly used in large radars, smelting equipment, mining, water conservancy equipment, astronomical telescopes and satellite communication ground stations.

The author of this article is Shaanxi Gainhui Heavy Industries Co., Ltd., which is a professional bearing manufacturer and supplier in China. The company supplies many types of the bearings, such as full ceramic ball bearings, skf spherical roller bearings, etc. With high quality and competitive bearing products, we sincerely provide services to customers all over the world.

Contact us for more details:

E-mail: emily@gainhui.com

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