Universal coupling

Abstract

The present invention proposes a universal joint, which includes an intermediate shaft with an intermediate fork at both ends and two connecting forks adapted to the intermediate fork, and also includes a joint for connecting the intermediate fork and the load-bearing ring assembly of the connecting yoke, the intermediate yoke and the connecting yoke are oppositely provided with two coaxially arranged trunnions, and the load-bearing ring assembly is provided with two groups for the middle The pair of holes into which the trunnion on the fork and the connecting fork are inserted, the axes of the two groups of pair of holes are perpendicular to each other, and a bearing cooperating with the trunnion is arranged in the pair of holes. The universal coupling of the present invention replaces the original cross shaft with a load-bearing ring assembly, and sets the bearing on the load-bearing ring assembly, which can avoid the limitation of the size of the fork head, and can choose a larger-sized bearing, so it has the advantages of High load capacity, the maximum torque can be increased by 20% to 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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