Universal Coupling | Couplings

The universal coupling utilizes the characteristics of its mechanism to make the two shafts not on the same axis, and when there is an angle between the axes, it can realize the continuous rotation of the connected two shafts, and reliably transmit torque and motion. The biggest feature of the universal coupling is: its structure has a large angular compensation capability, a compact structure and high transmission efficiency. The angle between the two axes of universal joints of different structure types is different, generally between 5°-45°. Structure type: Universal couplings have a variety of structural types, such as: cross shaft type, ball cage type, ball fork type, bump type, ball pin type, ball hinge type, ball hinge plunger type, three pin type, three fork rod type , Three ball pin type, hinge type, etc.; the most commonly used is the cross shaft type, followed by the ball cage type. In practical applications, according to the transmitted torque, universal coupling is divided into heavy, medium, light and small. Universal coupling use: A mechanical part used to connect two shafts (active shaft and driven shaft) in different mechanisms to make them rotate together to transmit torque. In high-speed and heavy-duty power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting. The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft. The general power machine is mostly connected with the working machine by means of a coupling. National standard specifications: The cross-shaft universal coupling is a large-scale universal coupling, and the bearing is a vulnerable part of the cross-shaft universal coupling. The main difference between several large cross-shaft universal joints is the change of the bearing seat and the cross fork to form different structures. In order to ensure the synchronization of the main and driven shafts, the double connection is adopted in practical applications. The connection of the double connection is nothing more than welding or flange connection by bolts. The middle length can be changed in many forms. The cross head components of the cross shaft universal coupling have the following forms: SWC type integral fork cross shaft universal coupling (JB/T 5513-2006), SWP type partial bearing seat cross shaft universal coupling Shaft (JB/T 3241-2005), SWZ type integral bearing seat cross shaft universal coupling (JB/T 3242-1993), WS type small double cross shaft universal coupling (JB/T 5901 -1991), WSD type small single cross shaft universal coupling (JB/T 5901-1991), SWP type cross shaft universal coupling with cross bag (JB/T 7341.1-2005), WGC type cross shaft Cross bag for universal joint (JB/T 7341.2-2006). The above heavy and small cross-shaft universal couplings are all universal. Different models in the automobile industry have their own dedicated cross-shaft universal couplings or other types of universal couplings. For example, a ball cage universal coupling is used for cars. In addition, agricultural machinery, industrial machinery and other sports machinery products also have special universal couplings, and most of the lifting adopts cross-axis universal couplings. Universal coupling classification: There are many types of couplings. According to the relative position and position changes of the two shafts connected, they can be divided into: ①Fixed coupling. It is mainly used in places where two shafts require strict alignment and no relative displacement occurs during work. The structure is generally simple, easy to manufacture, and the instantaneous speed of the two shafts is the same, mainly including flange couplings, sleeve couplings, and clamps Shell couplings, etc. ②Removable coupling. It is mainly used where the two shafts are deviated or there is relative displacement during work. According to the method of compensating displacement, it can be divided into rigid movable coupling and elastic movable coupling. Rigid movable couplings use the dynamic connection between the working parts of the coupling to have a certain direction or several directions to compensate, such as jaw coupling (allowing axial displacement), cross groove coupling (Used to connect two shafts with small parallel or angular displacement), universal coupling (used in places where the two shafts have a large deflection angle or a large angular displacement during work), gear coupling (Comprehensive displacement allowed), chain coupling (radial displacement allowed), etc., the elastic movable coupling (referred to as elastic coupling) uses the elastic deformation of the elastic element to compensate for the deflection and displacement of the two shafts. Elastic elements also have buffering and vibration reduction properties, such as serpentine spring couplings, radial multilayer leaf spring couplings, elastic ring pin couplings, nylon pin couplings, rubber sleeve couplings, etc. . Some couplings have been standardized. When selecting, you should first select the appropriate type according to the work requirements, and then calculate the torque and speed according to the diameter of the shaft, and then find the applicable model from the relevant manual, and finally make the necessary check calculations for some key parts. For more details please email us at