Straight line-involute profile inner-gearing cylindrical gear pair

Abstract

The invention discloses a meshed cylindrical gear pair in a linear-involute tooth profile, which comprises an internal gear and a gear in meshing transmission with the internal gear. The tooth profile of the internal gear is linear, and the tooth profile of the gear in meshing transmission with the internal gear is involute. The tooth profile of the internal gear is changed into a straight line from an involute, grinding teeth can be shaped only by linearly finishing by a grinding wheel, the finishing efficiency is remarkably improved, and the precision can reach grade 4 to 6; and the internal gear adopts low-carbon steel carburization quenching, not only has high tooth surface strength, but also does not need to adjust quality before quenching, and improves the gear shaping processing efficiency greatly, so the meshed cylindrical gear pair radically solves the problems of low processing efficiency of the internal gear, poor precision and low tooth surface hardness, and promotes overall performances of a high-speed heavy duty speed reducer (speed increaser) containing the internal gear pair made in China.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a linear-involute tooth profile internal meshing cylindrical gear pair applied in a mechanical transmission system. Background technique [0002] The planetary gear reducer has the advantages of small size, low vibration and noise, and plays an important role in aviation, automobile and other industries. The trend of the transmission system to high speed and heavy load has prompted the transition of the planetary gear reducer from the soft tooth surface to the hard tooth surface. At present, in the planetary gear reducer, the sun gear and the planetary gear have been efficiently ground, and the machining accuracy can reach 4-6 grades. Due to the lack of internal gear grinding machine tools in China, the tooth surface strengthening process of nitriding is generally used for internal gears. This heat treatment method requires high quenching and tempering...

AI Technical Summary

Problems solved by technology

With the development of mechanical science and technology, higher requirements are put forward for the precision, bearing capacity and stability of the mechanical transmission system. Modern machines are increasingly developing in the direction of high speed, heavy load and compact structure. The traditional involute internal gear is due to Some disadvantages such as low load-carrying capacity, too sensitive to manufacturing and installation errors, and uneven tooth surface wear make it difficult to meet the above requirements

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