Universal Joint Couplings
As a key component in mechanical transmission systems, universal joint couplings play an indispensable role in modern industrial equipment. It can effectively solve the power transmission problem in the case of axis misalignment, and is widely used in multiple fields such as automobiles, engineering machinery, metallurgical equipment, etc.
Universal joint coupling is a mechanical device used to transmit relative motion between axes. Its core function is to compensate for the angular deviation between two axes and achieve power transmission between non concentric axes. This type of coupling utilizes its unique structural characteristics to enable the connected shafts to rotate continuously and reliably transmit torque and motion when the two shafts are not on the same axis and there is an angle between the axes.
The most significant feature of universal joint couplings is their large angular compensation ability, compact structure, and high transmission efficiency. The allowable angle between the two axes of universal joint couplings of different structural types varies, generally between 5 ° -45 °. This angle compensation capability ensures the continuity and stability of power transmission even when the axis is misaligned due to equipment installation errors, working deformations, thermal expansion, and other factors.
In terms of importance in industrial applications, universal joint couplings are almost an essential component of all complex transmission systems. Universal joint couplings play a crucial role in automotive driveshafts, roller drives for rolling mills, and ship propulsion systems. It can not only transmit torque and rotational motion, but also absorb vibration, compensate for deviations, and protect other components in the transmission system from additional loads caused by misalignment. With the development of industrial equipment towards high speed, heavy load, and precision, the performance requirements for universal joint couplings are also increasing, driving continuous technological innovation in this field.
The basic structural composition of universal joint couplings is relatively standardized, mainly including core components such as cross shafts, universal joint forks, bearings, and lubrication and sealing devices. As the core component for force transmission, the cross shaft is usually made of alloy steel and undergoes heat treatment to improve its wear resistance and fatigue strength. Two universal joint forks are respectively connected to the driving shaft and the driven shaft, forming a movable joint through a cross axis. Bearings are installed at the connection between the cross shaft and the fork head, mostly needle roller bearings or sliding bearings, responsible for reducing friction and bearing radial loads. The lubrication system includes oil nozzles, oil passages, and seals to ensure that moving parts are adequately lubricated and prevent premature wear.
