Methods for designing and manufacturing double-lead linear contact bias worm drive

Abstract

The invention provides methods for designing and manufacturing double-lead linear contact bias worm drive, belonging to the fields of machinery principle and machinery manufacture. The double-lead linear contact bias worm drive belongs to the spiroid drive mode in the worm gear drive. The designing method in the invention has the following steps: 1. determining basic parameters according to the power, the transmission ratio and the rotating speed required to be transmitted; 2. performing parameter designing by taking a specified reference circle as a standard on the basis of preliminary calculation of the outer diameter of a worm gear; and 3. calculating each parameter in terms of the formula deduced from the above parameter designing. The manufacturing method in the invention comprises a mitting method, a fly-cutter hobbing method and a numerical control turning method. The invention has a simple and precious designing method, which can simplify the structure of the worm gear and machining and manufacturing; the current machine tool and cutter can be used to perform machining on tooth surfaces without adding other devices or using special machine tools and cutters except for adopting a special machine tool for efficient and high precision machining.

Description

technical field [0001] The invention belongs to the field of mechanical principles and mechanical manufacturing, and relates to gear meshing theory and worm drive. Background technique [0002] Since the 1950s, conical worm transmissions have appeared. This transmission form has improved the efficiency and load capacity of worm transmissions, increased the transmission ratio, and can replace copper with steel for worm gear materials. But about this transmission There are not many studies and applications of the worm gear, the main reason is that the meshing principle is complex, and the mathematical relationship used to describe the principle and the tooth surface is also very complicated, which makes the design and manufacture of this worm drive difficult. Theoretically, the conical worm drive pair worm is a variable-lead helical surface, and the pitch surface of the worm gear is a single-blade hyperboloid. To date, the design and manufacture of bevel worm drives are still...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of difficult design and manufacture of bevel worm transmission, and propose a simple and accurate design calculation method, which simplifies the structure of worm gear and worm, and can use existing machine tools and cutting tools to cut and process the tooth surface. without having to add equipment or use special machines and special tools

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