Universal coupling

Abstract

The invention provides a universal coupling which comprises an intermediate shaft, two connecting jaws and force bearing ring assemblies. Two intermediate jaws are respectively arranged at two ends of the intermediate shaft, the two connecting jaws are matched with the intermediate jaws, the force bearing ring assemblies are used for being connected with the intermediate jaws and the connecting jaws, two trunnions which are coaxially arranged are oppositely arranged on each of the intermediate jaws and the connecting jaws, two groups of paired holes are respectively formed in each force bearing ring assembly, the trunnions on the intermediate jaws and the trunnions on the connecting jaws can be inserted into the paired holes, the axes of the two groups of paired holes in each force bearing ring assembly are perpendicular to each other, and bearings which are matched with the trunnions are arranged in the paired holes. The universal coupling has the advantages that the original cross shafts are replaced by the force bearing ring assemblies, the bearings are arranged on the force bearing ring assemblies, accordingly, the jaws are free of dimensional constraints, the large bearings can be selectively utilized, the universal coupling is high in bearing capacity, and the maximum torque borne by the universal coupling can be increased by 20%-30%.

Description

technical field [0001] The invention relates to a shaft coupling, in particular to a universal joint. Background technique [0002] Such as Figure 8 The shown cross-shaft universal joint is a commonly used coupling, including an intermediate shaft 1 with an intermediate fork 2 at each end and two connecting forks 3 adapted to the intermediate fork 2 . The connecting forks 3 are used to connect with external parts, for example, the two connecting forks 3 are respectively connected with the transmission shafts of two machines. These two kinds of forks are connected together by a cross shaft. A bearing is arranged on the fork to support the cross shaft. suppose in Figure 8 The connecting yoke 3 on the left is connected to a driving shaft, and the connecting yoke 3 on the right is connected to a driven shaft. When working, the torque transmission sequence of the cross-shaft universal joint is: the connection on the left Fork 3→bearing→cross shaft on the left→bearing→middle...

AI Technical Summary

Problems solved by technology

[0003] The cross shaft universal coupling has some disadvantages. First, due to the size limitation of the fork head, the size of the bearing installed on the fork head is usually relatively small, and the cross shaft is also relatively small, so that the bearing is easily damaged when it is heavily loaded. , which limits the bearing capacity and service life of the universal coupling; in addition, the existing forks generally use cast steel as the blank, and only some necessary dimensions are machined during manufacture, and the rest are kept in the original casting state

The shape and weight of the fork head of the finished product are asymmetrical, the rotation accuracy of the universal joint coupling is poor during operation, the vibration amplitude is relatively large, and the occasions that require high speed and dynamic balance cannot meet the design requirements.

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