The invention provides a short rzeppa synchronous universal
coupling, which is mainly used for the
power transmission with
short distance, small inclination angle and high rotating speed in the metallurgical, heavy-duty, mining, lifting, transportation machinery and other industries. The
coupling consists of two all-sealed rzeppa universal joints which mesh with each other through two outer ringsprovided with teeth on the end surfaces and are fastened through a bolt, wherein an inner hole of an inner ring is a spline or keyway hole and is matched with corresponding shaft extension to achive the transmission of a driving / driven end; a
steel ball is arranged between the inner ring and the outer rings; the
steel ball is arranged in a window of a cage; the cage is embedded between the inner ring and the outer rings; a link bolt does not bear
shear force formed by
torque transmission ; and torque is transmitted to the driven end through an inner-ring channel of the driving end, the
steel ball and an outer-ring channel. The
coupling has the advantages of constant-speed transmission, smooth operation, compact structure, high
bearing capacity, great angular compensation (generally up to 5degrees), strong adaptability to field work, convenient installation and adjustment, improvement on
internal friction and wear, longer
life span and capability of effectively preventing vibration from causing bolts to loosen.