Design method of spiral bevel gear

Abstract

The invention relates to a design method of a spiral bevel gear, which is technically characterized in that a coordinate system is established by using the tooth number z of small spiral bevel gears as an abscissa and using the end surface module mi of larger ends as an ordinate, a tooth number-module curve satisfying critical condition thereof is respectively drawn according to contact strength constraint conditions and bending strength constraint conditions, and a public area above the two curves is a feasible region satisfying strength reliability requirements. On the basis, the overlap ratio of the gear under the specific tooth number is marked, so that the optimal solution of gear driving is obtained in the feasible region simultaneously satisfying an overlap ratio constraint condition. Then a tooth number-module curve corresponding to a preset volume is drawn, and a discrete optimal solution with the smallest volume is found by continuously changing a preset volume value. A gearreliability optimization method disclosed by the invention breaks through a traditional reliability optimization method, overcomes the defects of an existing optimization method and is the design method which can be applied to the reliability optimization of all gears.

Description

technical field [0001] The invention relates to a design method of a spiral bevel gear, which is applicable to the design method of a spiral bevel gear (with constant tooth width coefficient and constant helix angle) in the fields of automobiles and the like. Background technique [0002] Spiral bevel gear transmission has the advantages of high load capacity, smooth motion and low noise, so it has been widely used in high-speed and heavy-duty transmission. The high reliability requirements of spiral bevel gear transmission will inevitably lead to an increase in the volume and quality of the gear. Therefore, research on the reliability optimization design of the spiral bevel gear transmission to minimize the volume and weight is in line with the objective and actual needs. [0003] At present, the research methods for the reliability optimization design of gear transmission include compound shape method, feasible enumeration method, MDCP method and so on. Both the compound...

AI Technical Summary

Problems solved by technology

It can be seen that the optimal solution obtained by this method may not be the real optimal solution, and the selection of the initial value is harsh, and the convergence is difficult to judge, so it is difficult to find the optimal solution

Although the MDCP method is suitable for solving mixed discrete variables in engineering design, it has disadvantages such as complicated calculation process and difficult control of parameters.

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