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A design method of transmission helical gear

A design method, helical gear technology, applied to components with teeth, belts/chains/gears, mechanical equipment, etc., can solve problems such as inaccurate results, no coincidence, limited noise optimization of transmission helical gears, etc., to achieve Reduce repeated revisions, save time, and reduce development costs

Active Publication Date: 2020-08-07
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

But it still has the following problems: (1) Ishikawa method is used for calculation, although the calculation is fast but the result is inaccurate; (2) the coincidence degree is not used as the control target (that is, the constraint condition); its effect on the noise optimization of the helical gear of the transmission is limited

Method used

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  • A design method of transmission helical gear

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] Such as figure 1 The design method of the transmission helical gear is shown, including:

[0033] The first step, according to the center distance of the transmission provided in the design task book, the speed ratio of each gear pair and the set structural parameters of each helical gear (that is, helix angle, pressure angle, normal modulus, number of teeth, tooth width, variable coefficient, backlash, tooth profile chamfer, addendum chamfer, machining allowance), use the Romax software to establish a transmission model, and obtain the coincidence degree data, dedendum fillet data of each gear pair from the transmission model, Variation coefficient data, addendum width data, and top clearance (or bottom clearance) data; among them, the helix angle of each helical gear is set to 30°, the pressure angle to 20°, the variation coefficient to 0, and the backlash ...

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Abstract

The invention discloses a design method of a transmission helical gear. The method comprises the following steps: a step of using Romax software to build a transmission model; a step of adjusting structure parameters of a transmission in a certain range, and performing arrangement and combination of gear pairs of each gear; a step of screening the arranged and combined gear pair combination according to a constraint condition; a step of performing safety factor calculation and reliability screening on the gear pair combination screened through the constraint condition; and a step of performing transfer error calculation and comparative analysis on the gear pair combination subjected to the reliability screening. The design method of the transmission helical gear provided by the invention can reasonably and accurately design the structure parameters of the transmission helical gear, and reduce the gear whine noise of the transmission.

Description

technical field [0001] The invention belongs to the field of automobile transmissions, and in particular relates to a design method of a transmission helical gear. Background technique [0002] The whistling noise of the transmission has strong regularity with the change of speed and frequency, and it is the most frequent noise problem in the transmission system. At present, the basic method to solve the transmission whine is to modify the gear microscopically or optimize the transmission path. The micro-modification of gears has high requirements on gear machining accuracy, and its manufacturing cost and time cost also increase accordingly, and the consistency is difficult to guarantee. The preferred target components or corresponding rotational speed (frequency) of the noise transmission path optimization method are not easy to lock, even if the target is locked, the optimized space is often limited by layout, cost and other performance requirements, making it difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17F16H55/17
CPCF16H55/17G06F30/17
Inventor 付瑞余波何健马小英李凤琴刘莹陈扬森熊驰
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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