Design method for curved-tooth non-circular gear

Abstract

The invention belongs to the technical field of non-circular gears and discloses a design method for a curved-tooth non-circular gear. The tooth profile of the curved-tooth non-circular gear is designed through a generating gear. The tooth profile equation is solved according to the curved surface of a counterpart rack, the kinematic relation of gear generation and the engagement principle. Compared with a straight gear, the curved-tooth non-circular gear designed through the method is high in contact ratio and bearing capacity. Compared with a bevel gear, the curved-tooth non-circular gear designed through the method does not generate axial force in the transmission process and has low requirements on bearings and installation. Through the arc tooth profile of the curved-tooth non-circular gear, lubricating oil is contained in the tooth surface, and therefore a quite good lubricating condition is achieved.

Description

technical field [0001] The invention relates to a non-circular gear, in particular to a design method of a curved-tooth non-circular gear. Background technique [0002] Non-circular gears are used to transmit non-uniform motion between two shafts. Compared with other non-uniform speed ratio transmission mechanisms (such as cams, connecting rods, etc.), they have the advantages of stable transmission, compact structure, and high motion precision. They are widely used in textiles, cigarettes, In papermaking and other machinery and equipment. However, because the pitch curve is non-circular, the design and manufacture are much more complicated than circular gears, and three-dimensional modeling is particularly difficult. [0003] The motion characteristic of non-circular gears is that it can realize the nonlinear relationship between the rotation angles of the active mechanism and the driven mechanism, so it has been paid more and more attention in light industry, heavy indust...

AI Technical Summary

Problems solved by technology

[0004] However, the above traditional non-circular gears have straight teeth or helical teeth, and the meshing form is line contact meshing.

Due to the processing of non-circular gears, the machine tool needs to do variable speed ratio movement, and its motion accuracy is lower than that of circular gears. However, the characteristics of line meshing make it more sensitive to errors and cannot be used in high-speed occasions.

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