The connection parts of universal couplings are not prone to loosening

Once both ends of the universal coupling are installed, it can be put into operation. The connection at the driving end is a tight fit and is not easy to loosen, while the connection at the driving end is often a loose fit and is prone to disengagement after operation. As a result, the efficiency of the universal coupling in transmitting torque is reduced. Universal couplings are equipped with built-in springs to prevent the mating parts from retracting during operation, maintaining a constant fit length and enhancing the stability of transmission.

The universal coupling is equipped with a protective sleeve to prevent dust and water from the external environment from entering the interior of the splines when they move relatively, thus prolongs the service life of the spline pair. The centers of the force-transmitting steel balls are all located in the plane passing through the center of the coupling and are installed in the raceway composed of the spherical outer ring and the spherical outer surface groove of the star-shaped inner ring. The centers of the two spherical surfaces coincide with the center of the universal coupling.

To ensure that the centers of all steel balls are on the bisector of the Angle between the axes of the two shafts, the steel balls are installed in a ball cage. This guarantees that when the Angle between the driving and driven shafts of the coupling changes, the force transmission point can always be on the bisector of the Angle, and the transmission speeds between the driving and driven shafts can be kept synchronized. The transmission mode of universal couplings can adopt sliding transmission or rolling transmission. When sliding transmission is used, in order to buffer and reduce vibration, polymer buffer sleeves are installed on the ball arm and the force transmission arm.

When rolling transmission is adopted, the original buffer sleeves on the ball arm and the force transmission arm are modified into rolling elements. Meanwhile, the original buffer pads between the ball head and the socket seat are also changed into rolling elements to meet the requirements of rigid transmission. The force transmission arm pair includes a ball arm and a force transmission arm. The force transmission arm is installed in the hole or groove of one connection plate with bolts, and the ball arm is installed in the hole or groove of the other connection plate. It has the performance of buffering and vibration reduction, can reduce noise, and automatically lubricate in a cycle.