Bevel gear with combined arc tooth profile curves and involute tooth profile curves

Abstract

The invention discloses a bevel gear with combined arc tooth profile curves and involute tooth profile curves, wherein the tooth profile curves of the bevel gear comprise a top convex-arc segment, an involute segment and a root concave-arc segment, wherein the top convex-arc segment, the involute segment and the root concave-arc segment are sequentially connected from the top to the root; the top convex-arc segment and the root concave-arc segment are both tangential to the involute segment; and the radius of the root concave-arc segment is larger than that of the top convex-arc segment. The bevel gear of the invention has the advantages of separability of center distance of the involute gear; the bevel gear is simple in manufacturing, convenient in measuring, large in contact strength of the arc gear, excellent in running-in performance and the like; the contact stress of the gear surface can be largely reduced and the loading ability of the gear surface can be largely improved. In addition, the bevel gear does not have undercutting phenomenon, and the minimum number of teeth can be one, so that the bevel gear has remarkable meaning for realizing light weight of the gear and the transmission device thereof.

Description

technical field [0001] The invention relates to a gear, in particular to a helical gear. Background technique [0002] Gear is a typical mechanical basic part, which is widely used in various fields of national economy. In mechanical transmission, gears rely on special tooth profiles to ensure their transmission accuracy. Among all kinds of gear transmission, involute gear transmission has been widely used because of its separability of center distance and many advantages such as convenient manufacture and measurement. However, involute gears also have some disadvantages. For example, the farther the meshing point is from the node, the greater the relative sliding speed between the two meshing tooth surfaces, which has great impact on the wear of the tooth surface, transmission stability, transmission efficiency and gear life. There are adverse effects; secondly, the involute external gear transmission is the meshing transmission of convex teeth to convex teeth. From the p...

AI Technical Summary

Problems solved by technology

And the arc gear has good running-in performance, its equivalent radius of curvature is much larger than that of the involute gear, so compared with the involute gear, its contact strength is greatly improved, but it also has Some shortcomings, such as sensitivity to center distance and low bending strength of dedendum, hinder the improvement of its load-carrying capacity and transmission accuracy, and it is difficult to meet the requirements of arc gear transmissions in some important fields

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