Point contact gear and meshing pair based on conjugate curves and machining tool thereof

Abstract

The invention discloses a point contact gear and a meshing pair based on conjugate curves and a machining tool of the point contact gear and the meshing pair. The point contact gear comprises a convex gear and a concave gear which are in one-point or multi-point contact meshing, and a contact curve composed of meshing points on a tooth profile curved surface of the convex gear and a contact curve composed of meshing points on the concave gear are the conjugate curves. According to the point contact gear meshing pair based on the conjugate curves, a convex gear tooth surface and a concave gear tooth surface are in one-point or multi-point contact at the same time according to the meshing mode of the meshing pair, and the contact tracks of the contact points on the tooth surfaces are smooth space curves. The meshing characters of the conjugate curves are inherited by the transmission, point contact tooth profiles are high in contact strength, high in bearing capacity, high in transmission efficiency and low in lubricating oil temperature rise, the sliding ratio is greatly lowered, and abrasion is low. Meanwhile, gear meshing achieves one-point contact or double-point contact or multi-point contact at the same time through different contact curves according to different use needs, and the problem that an existing point contact gear with a ball race pipe type envelope surface with a sphere center moving along a circle center curve as a tooth profile curved surface only achieves one-point contact in the meshing process is solved.

Description

technical field [0001] The invention belongs to the technical field of gear transmission, in particular to a conjugate curve-based point contact gear, an meshing pair and a processing tool thereof. Background technique [0002] As a typical mechanical basic part, the gear determines the performance of the equipment to a large extent, so the design of high-performance gear transmission components is also of great significance and engineering practical value. Traditional gear transmissions such as helical gear transmission, worm gear transmission, bevel gear pair, quasi-hyperbolic pair, etc., the tooth surfaces are all conjugate surfaces, and the meshing tooth profiles are convex tooth profiles. During the meshing process, it is usually a line contact, so The bearing capacity of the tooth surface is low, the sliding rate between the tooth surfaces is large, and the wear of the tooth surface is serious. [0003] The development of production and technology has put forward high...

AI Technical Summary

Problems solved by technology

Traditional gear transmissions such as helical gear transmission, worm gear transmission, bevel gear pair, quasi-hyperbolic pair, etc., the tooth surfaces are all conjugate surfaces, and the meshing tooth profiles are convex tooth profiles. During the meshing process, it is usually a line contact, so The bearing capacity of the tooth surface is low, the sliding rate between the tooth surfaces is large, and the tooth surface wears seriously

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