The expansion joint sleeve (referred to as the expansion sleeve) is an advanced basic component widely used in the world for mechanical connection under heavy load. A keyless coupling that transmits loads by pressure and friction.

The expansion sleeve is a keyless connection device. Its principle and purpose are to generate a huge tightening force between the inner ring and the shaft, between the outer ring and the hub through the action of high-strength tension bolts, so as to realize the mechanical parts and the shaft. keyless join. When under load, torque, axial force or the combined load of the two is transmitted by the combined pressure of the expansion sleeve, the machine parts and the shaft and the accompanying frictional force. The expansion sleeve connection mainly has the following advantages: high alignment accuracy; easy installation/adjustment/disassembly; high strength, stable and reliable connection; can protect the equipment from damage when overloaded, especially suitable for transmitting heavy loads. Widely used in heavy machinery, wind power generation, packaging machinery, printing machinery, CNC machine tools, automation equipment and other fields.