COMSOL 6.2 - Universal Joint

A universal joint, also known as Hooke’s joint or Cardan joint, is commonly used to transmit rotational motion between shafts that have different orientations. You can use the node in 3D components to simulate this behavior. Physically, this joint is made up of pair of hinge joints, oriented perpendicular to each other, connected by a cross shaft or gimbal. The universal joint is an abstract joint where the gimbal is not modeled and both the shafts are directly connected to each other. In general, this joint is used for the purpose of transfer of mechanical power from one shaft to another shaft. The added degrees of freedom in this joint are the relative rotations about the two legs of the gimbal that form joint axis and second axis.

	See Prismatic Joint for these settings — Attachment selection, Center of Joint, Joint Elasticity, Joint Forces and Moments, and Sketch.

Select an — or .

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For enter a value or expression for ei0. The default is (1, 0, 0). The direction is given in the coordinate system selected in the section.

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For an edge can be selected on the Input Shaft Orientation subnode, which is added automatically. The vector from the first to the last end of the edge is used to define the input shaft orientation. Any edge in the model can be used. Select the check box to reverse the direction of the shaft orientation.

Select an — or .

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For enter a value or expression for eo0. The default is (1, 1, 0). The direction is given in the coordinate system selected in the section.

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For an edge can be selected on the Output Shaft Orientation subnode, which is added automatically. The vector from the first to the last end of the edge is used to define the output shaft orientation. Any edge in the model can be used. Select the check box to reverse the direction of the shaft orientation.

Select an — or . For enter a value or expression for eaux0 based on space dimension. The direction is given in the coordinate system selected in the section.

Select an — or . For enter a value or expression for the θg0.

Select — (default), , or , to choose how to group the dependent variables added by the feature in the solver sequence.