Worm and worm gear on basis of conjugate curves, and mesh pair with worm and worm gear

Abstract

The invention discloses a worm and a worm gear on the basis of conjugate curves, and a mesh pair with the worm and the worm gear. The worm gear and worm mesh pair comprises the worm gear and the worm which are meshed with each other; a contact curve gamma 1 which consists of meshed points on a tooth profile curved surface of the worm and a contact curve gamma 2 which consists of meshed points on a tooth profile curved surface of the worm gear are the conjugated curves; the tooth profile curved surface of the worm is a spherical enveloping surface in the shape of a tube nest, and the spherical center of the spherical enveloping surface moves along circle center curves gamma 1' equally distanced from the contact curve gamma 1; and the tooth profile curved surface of the worm gear is a spherical enveloping surface in the shape of a tube nest, and the spherical center of the spherical enveloping surface moves along circle center curves gamma 2' equally distanced from the contact curve gamma 2. The worm gear, the worm and the worm gear and worm mesh pair on the basis of the conjugate curves have the advantages that the tooth profile curved surfaces of the worm gear and the worm which are meshed with each other are the spherical enveloping surfaces in the shapes of the tube nests, and the meshed points between the worm gear and the worm move along the conjugate curves; and the mesh characteristics of the conjugate curves are inherited for the worm gear and worm mesh pair, the contact strength of tooth profiles which are in concave-convex point contact with one another is high, the carrying capacity and the transmission efficiency are high, and temperature rise of lubricating oil and abrasion are low.

Description

technical field [0001] The invention belongs to the technical field of worm gear transmission, in particular to a worm based on a conjugate curve, a worm wheel and an engaging pair thereof. Background technique [0002] A worm drive is a transmission mechanism that transmits power or motion between staggered shafts. The axes are staggered in space so that the main motion characteristic is relative sliding instead of relative rolling, that is, the relative speed of the contact point of the conjugate tooth surface is always greater than the peripheral speed of the worm or worm wheel, and the tooth surface is prone to abrasive wear and adhesive wear. The current cylindrical worm drive is mainly divided into straight grain surface cylindrical worm drive and curved surface cylindrical worm drive. The meshing of the conjugate tooth surface of the straight-grained cylindrical worm drive is that the convex surface is in contact with the convex surface, while the meshing of the arc-...

AI Technical Summary

Problems solved by technology

However, in the current arc-toothed worm transmission, the tooth surface of the worm is designed as a concave surface. During the meshing process, the worm is prone to generate heat, and the tooth surface is prone to adhesive wear, which reduces the efficiency and service life of the worm transmission.

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