Curve conjugation based symmetrical cambered surface conjugate curve gears and engagement pair thereof

Abstract

The invention discloses curve conjugation based symmetrical cambered surface conjugate curve gears and an engagement pair thereof. The engagement pair comprises a gear I and a gear II, wherein the gear I and the gear II are engaged with each other in a point contact mode, and a contact curve gamma 1 which is composed of engagement points on a tooth profile cambered surface of the gear I and a contact curve gamma 2 which is composed of engagement points on a tooth profile cambered surface of the gear II are conjugate curves. According to the engagement pair of the curve conjugation based symmetrical cambered surface conjugate curve gears, the contact curve gamma 1 of the gear I and the contact curve gamma 2 of the gear II which form the engagement pair are conjugate curves, and engagement points between the gear I and the gear II move along contact curves; the engagement pair has the advantages of point contact engagement, tooth profiles of point contact have the high contact strength, the contact transmission process is close to pure rolling along the axial direction, and the transmission efficiency is high; and the selection and the determination of the small tooth number and the large modulus can be achieved on the conditions of the same transmission ratio and the same center-to-center distance, the transmission requirements of high speed, heavy load, high power and high efficiency can be met, and the engagement pair has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of gear transmission, and in particular relates to a symmetric arc surface conjugate curve gear and its meshing pair based on curve conjugation. Background technique [0002] Gears are typical key basic parts in the equipment manufacturing industry and are widely used in production practice. In mechanical transmission, the conjugate mesh pair often determines the performance of gear transmission. The current gear meshing pairs mainly have two meshing gear transmission forms: line contact and point contact: generally speaking, in the case of line contact, the sliding rate between the tooth surfaces of the meshing pair is large, the tooth surface is severely worn, and it is easy to generate heat and power consumption. Reduce transmission efficiency; and the main feature of point contact gears is that their sliding ratio can be greatly reduced due to their approximate pure rolling meshing. Involute gears and a...

AI Technical Summary

Problems solved by technology

However, the distance and position between the meshing points of circular arc gears have a certain impact on the transmission stability and carrying capacity. There are shortcomings such as sensitivity to the center distance, axial force, and low bending strength of the tooth root, which hinder the carrying capacity and load capacity. The improvement of transmission accuracy makes it difficult to meet the requirements of arc gear transmission in some important fields

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