Single-arm planetary structure and gearbox

Abstract

The invention relates to the technical field of gearboxes, and discloses a single-arm planetary structure and a gearbox. The single-arm type planet structure comprises a planet carrier, a needle bearing, a planet wheel and a gear ring; the planet carrier comprises a planet carrier body and a mounting shaft arranged on the planet carrier body; the needle bearing is arranged on the mounting shaft ina sleeving manner and is in clearance fit with the mounting shaft; a bearing hole is formed in the planet wheel, and the needle bearing is assembled in the bearing hole in a clearance mode; and the gear ring is meshed with the planet wheel. The diameter of the bearing hole of the single-arm planetary structure is reduced, the maximum force which can be borne by the planetary gear when the planetary gear is bent is increased, and although the diameter of the needle bearing is smaller than that of an existing cylindrical roller bearing, the needle bearing has the advantage of being high in contact rate, so that the bearing capacity of the needle bearing is still improved to a certain extent; according to the single-arm type planetary structure, the diameter of the mounting shaft is increased, the rigidity and the strength of the planet carrier under load deformation are improved, and the bearing capacity of the single-arm type planetary structure is improved.

Description

Technical field [0001] The invention relates to the technical field of gearboxes, in particular to a single-arm planetary structure and a gearbox. Background technique [0002] Such as figure 1 As shown, the traditional single-arm planetary structure is assembled by a nitrided ring gear 100, a planetary wheel 200, a cylindrical roller bearing 300, a planetary carrier 400, etc. The planetary wheel 200 is provided with a bearing hole, and the cylindrical roller bearing 300 Installed in the bearing hole. Limited by the space of the single-arm planetary structure, due to the large radial dimension of the cylindrical roller bearing 300, the diameter of the bearing hole is larger, and the planet carrier 400 includes the planet carrier body 4001 and the mounting shaft 4002. The mounting shaft 4002 The outer diameter is small, which makes the root of the mounting shaft 4002 easy to produce stress concentration, resulting in poor bending bearing capacity of the planet wheel 200 and the b...

AI Technical Summary

Problems solved by technology

[0003] Based on the above, the object of the present invention is to provide a single-arm planetary structure and a gearbox, which solves the problem that the traditional single-arm planetary structure in the prior art has a poor bearing capacity and cannot meet the design requirements.

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