Split joint-fork type cross universal joint

Abstract

The invention relates to a split joint-fork type cross universal joint which is characterized in that the universal joint fork is a composite member comprising two half joint forks, and a whole rotation axis which is formed by the radial butt joint of the axial tail sections of the two half joint forks is inserted in an axial hole which is arranged at one end of a joint-fork shaft sleeve by utilizing a way of interference connection and is axially and relatively fixed by a stop bolt which is connected in a corresponding radial hole of the two half joint forks by utilizing the way of the interference connection. By means of end face tabling with the joint-fork shaft sleeve, the two half joint forks are located in circumference direction and the carrying capacity is increased; by means of the symmetrical radial compression of a regulating nut arranged on the outer circumference face to the outer conical surface of the end face tooth, the gap between the half joint fork and a cross shaft as well as the compaction degree can be regulated; therefore, the high quality of assembling can be obtained with cordwood simple splicing operation and rapid regulation; the influence of nonobjective factors in the assembling process on the working quality of the universal joint can be removed in the maximal degree; and finally the universal joint capable of doing high-precision universal drive can be rapidly and reliably obtained.

Description

technical field [0001] The invention relates to a shaft coupling / universal joint for intersecting shafts in the field of mechanical transmission, in particular but not only to a cross shaft type universal joint capable of precision transmission. Background technique [0002] Because the ordinary cross-axis universal joints in the prior art more or less have rotation clearance / idle travel, they are generally difficult to meet the high-precision transmission requirements in high-precision work fields such as ultra-precision machining. Documents CN100385132C and CN100462578C respectively disclose two types of improved cross-axis universal joints with high-precision transmission capability. But the two improved universal joints still have the same disadvantages as the common cross axis universal joints. That is to say, the operation and adjustment of the seat hole in the assembly of the cross shaft is too time-consuming, and it depends more on human subjective factors, tooling ...

AI Technical Summary

Problems solved by technology

However, the two improved universal joints still have the same disadvantages as ordinary cross-axis universal joints

That is to say, the operation and adjustment of the seat hole in the assembly of the cross shaft is too time-consuming, and it depends more on human subjective factors, tooling fixtures or subsequent detection factors. Even if there are high-precision parts, It is also not easy to ensure that the intersection of the cross axis coincides with the intersection of the axes of the two drive shafts required by the design, so that the axis of at least one drive shaft of the universal joint is not easy to coincide with its actual axis of rotation

Therefore, there is a possibility of reducing the working quality of the universal joint and aggravating its mechanical wear, and therefore it is difficult to adapt to high-speed transmission, and the elimination of this possibility depends more on the high quality and time-consuming assembly, which not only increases the cost but also reduces the cost. Easy to ensure high assembly consistency

In other words, high-precision parts production cannot ensure high-quality universal joints, which must rely on high-quality assembly

In addition, the quality of the adjustment to eliminate the gap in use, such as after wear, is less likely to be guaranteed

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