Tiltrotator, also known as the universal quick change connector, is mainly installed between various types of robotic arms and attachments. Its main functions include driving attachments to rotate 360 ° and swing left and right, as well as quickly changing work attachments. In addition, according to specific requirements, it can also achieve automatic connection and conduction of the attachment oil circuit, thereby realizing all-round operation of attachments. Hydraulic wrist is an indispensable key component of various hydraulic robots and hydraulic robotic arms, and is also an important component for achieving multifunctionality in hydraulic excavators.