A lubricated bearing suitable for multi-degree-of-freedom spherical motion device

Abstract

The invention provides a lubricating bearing applied to a multi-freedom-degree spherical moving device which comprises a complete spherical inner shell and a non-complete spherical outer shell, wherein the outer surface of the inner shell and the inner surface of the outer shell are spherical surfaces with the coincident sphere center, the outer shell is connected and fixed by two bolts, a spiralarc groove with a spiral angle in a 10 to 15-degree range is arranged on the inner surface of the outer shell, a holder on which rolling balls are arranged is arranged in the groove, an oil inlet is arranged in the outer surface of the casing, injected lubricating oil can enter a spiral rolling way to fill a layer of lubricating oil between the inner shell and the outer shell, and a layer of sealing ring is arranged between the inner shell and the outer shell to prevent the lubricating oil from leaking. The lubricating bearing disclosed by the invention has the advantages of compact and reasonable structure and convenience in installation; the rolling balls in the spiral arc groove can bear larger radial load, axial load and radial-axial combined load and can change sliding friction into rolling friction, so that a friction type is changed, and a friction coefficient is reduced; the lubricating bearing has the advantages of very good wear resistance, and the service life of the lubricating bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of lubricating bearings, in particular to a lubricating bearing suitable for a multi-degree-of-freedom spherical motion device. Background technique [0002] With the rapid development of modern industry and manufacturing industry, various devices and driving components that need to realize spherical multi-degree-of-freedom motion, such as multi-degree-of-freedom motion motors, are emerging. The motion characteristics have a more significant impact, and it is necessary to continuously improve the performance of lubricated bearings suitable for multi-degree-of-freedom spherical motion devices. Compared with the existing oil film sliding bearings with only inner and outer spherical shell structures, the inner surface of the shell is provided with two circular cycles. Bearings with a raceway structure, linear motion bearings in which the balls are arranged axially on the raceway, and bearings with inclined groo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lubricating bearing suitable for multi-degree-of-freedom spherical motion devices, to solve the problem that the prior art bearings are dominated by sliding friction, resulting in large friction, serious wear, and short service life, which leads to the multi- The poor adaptability of the degree of freedom spherical motion affects the overall operating performance, and even fails to operate normally.

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