Ball-type traction assembly

A ball-type traction assembly, comprising a ball socket (1), wherein a surface position of the ball socket (1) is connected with a traction ball (2) through an installation and limiting mechanism, the installation and limiting mechanism comprises a thread at a lower end of the traction ball (2) and a hole provided on one side below the ball socket (1), a set of connecting seats (5) are fixed at a position on one side of the ball socket (1) away from the traction ball (2), and a locking hole (6) is provided on one side of the connecting seat (5), and by providing the connecting seat (5) and the locking hole (6), the ball-type traction assembly can be installed at an installation position on a car;

• further comprising:
• a hole being provided at a surface position of one side of the ball socket (1), wherein a position of the traction ball (2) is limited through an installation and limiting mechanism, and by arranging the installation and limiting mechanism, the traction ball (2) may be guaranteed to be inserted into an interior of the ball socket (1) to prevent the traction ball (2) from rotating;
• a position where the traction ball (2) is in contact with the ball socket (1) being subjected to local planarization treatment, to provide a flat surface;
• a corresponding position of the hole in the ball socket (1) being also subjected to planarization treatment;
• and a contact surface of the ball socket (1) and a contact surface of the traction ball (2) fitting together.