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Externally meshed gear pair

A technology of external gears and gear pairs, which is applied to gear transmissions, belts/chains/gears, components with teeth, etc. It can solve the problem of fewer design parameters, achieve enhanced transmission performance and sealing function, and is beneficial to processing and testing Effect

Inactive Publication Date: 2013-05-29
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an external meshing gear pair, which solves the problem in the prior art that only symmetrical tooth profiles can be used due to the lack of design parameters

Method used

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] The external meshing gear pair of the present invention, the single tooth profile of the external gear I is composed of a cosine-based compound curve that satisfies the first-order continuous straight line segment I, cosine curve I, straight line segment II and cosine curve II in polar coordinates, and the external gear I The single conjugate tooth profile of the external gear II corresponding to the single tooth profile is obtained through the meshing principle to form a conjugate gear pair; the complete conjugate gear pair is the single tooth profile of the external gear I and the external gear II respectively around its center according to the number of teeth. Cloth gets.

[0047]The design method of the external meshing gear pair of the present invention: first determine the single tooth profile of the external gear I in th...

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Abstract

The invention discloses an externally meshed gear pair which comprises two external gears. In polar coordinates, a single figure of the external gear I is sequentially composed of a cosine base compound curve which is composed of a line segment I, a cosine curve I, a line segment II and a cosine curve II. The line segment I, the cosine curve I, the line segment II and the cosine curve II meet first order continuity. A single conjugate figure of the external gear II corresponding to the single figure of the external gear I is obtained through a meshing principle and a conjugate gear pair is formed. A complete conjugate gear pair is obtained as the single figures of the external gear I and the external gear II respectively rotate around the center of the conjugate gear pair and evenly distributed according to the number of teeth of the conjugate gear pair. An asymmetric gear pump figure is obtained by adjusting symmetrical coefficients of the gear figure so that long sides in two gear sides of the gear are suitable for transmission, while short sides are suitable for seal. Separation of functions of transmission and seal are benefited and transmission and seal performance is enhanced. Fairness between the gear pairs can reach first order continuity and a mathematical model is set up for multivariate optimization of the gear pair.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and is especially suitable for external meshing fixed-ratio transmission and external gear pumps. Background technique [0002] External gear pairs are widely used in the mechanical field. At present, external gear pumps and external gear tooth profiles mainly include involutes and cycloids. The common design method is to design the tooth profile in the Cartesian coordinate system. This gear pair design method generally has fewer design parameters, and usually only symmetrical tooth profiles can be used. Contents of the invention [0003] The purpose of the present invention is to provide an external meshing gear pair, which solves the problem in the prior art that usually only symmetrical tooth profiles can be used due to the lack of design parameters. [0004] Another object of the present invention is to provide a design method for the above-mentioned external meshing gear pair. [00...

Claims

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Application Information

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IPC IPC(8): F16H1/04F16H55/17F16H55/08F04C15/00
Inventor 魏伟锋张广鹏杜真一穆卫谊
Owner XIAN UNIV OF TECH
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