Spherical universal coupling

Abstract

The invention provides a spherical universal coupling. The spherical universal coupling is characterized in that the spherical universal coupling comprises an outer coupling component, an inner coupling component, balls and a retainer, wherein six raceway grooves are formed in the inner-diameter surface of the outer coupling component, six raceway grooves which are paired with the raceway grooves of the outer coupling component are formed in the outer-diameter surface of the inner coupling component, the balls are arranged between the raceway grooves of the outer coupling component and the raceway grooves of the inner coupling component and used for transmitting the torque, and the retainer is used for retaining the balls. The inner coupling component comprises a left inner coupling component body, a right inner coupling component body and a pipe sleeve, wherein the left inner coupling component body is connected with the right inner coupling component body through the pipe sleeve, and the pipe sleeve is sleeved with a support bearing. The raceway grooves of the outer coupling component and the raceway grooves of the inner coupling component are parallel to the axis, and three balls are evenly arranged in each raceway groove along the axis. The spherical universal coupling has the beneficial effects of being high in transmission efficiency, simple in structure and convenient to install.

Description

technical field [0001] The invention relates to a universal joint, in particular to a ball-type universal joint used in straightening equipment for metal strips. Background technique [0002] When the metal strip straightening equipment is equipped with a coupling, neither the worm shaft 1 on the operating side nor the worm shaft 2 on the transmission side can rotate in any way. Because the rotation of any one of the worm shafts will cause the working rolls of the upper roll system and the working rolls of the lower roll system to be non-parallel, so that the plate shape defects such as edge waves will appear in the straightening strip. [0003] In recent years, in order to operate smoothly under high load and high-speed rotation, suppress heat generation, and improve durability, eight balls are used as torque transmission members, and the axial offset of the center of curvature of the track groove is set. 0, the structure of inclining adjacent track grooves, specifically r...

AI Technical Summary

Problems solved by technology

Even if the driving shaft and the driven shaft form a certain angle, the ball-type universal synchronous coupling can still ensure the synchronization accuracy of the transmission. However, when this coupling is assembled and disassembled, the position of the keyway must be corrected, resulting in the failure of the driving shaft or the driven shaft. There must be a certain rotation when installing the coupling, this rotation will affect the parallelism accuracy of the roller shaft and affect the straightening quality of the strip

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