Resumo

HERRERA-HERNANDEZ, V.. Methodology based on a linear regression study for determining the optimum mounting position of the drive gear of an automotive differential. RIIIT. Rev. int. investig. innov. tecnol. [online]. 2018, vol.6, n.32. ISSN 2007-9753.

There are many reasons for the control of spiral and hypoidal bevel gears in production, such as production monitoring and quality documentation of manufactured gears. However, in the stage of mounting a differential, the main reason is to predict the noise emissions and reduce it by adjusting the mounting distance before the final stage of assembly. When a system of spiral or hypoidal bevel gears is assembled in the housing, usually 2 variables can be adjusted:

The mounting distance of the crown (adjustment of the play between teeth).

The mounting distance of the pinion (Adjustment of the marking of the fingerprint and consequently the operating behaviour).

The objective of this document is to provide a technique that determines the optimum mounting position of the wheel gear of an automotive differential, where, the backlash is within the tolerances established by design, in order to establish the shims of differential adjustments, without depending on the skill of the operator. For this, by means of a regression analysis, the relationship between wheel axial displacement and backlash, is established. Once the optimum mounting position has been found, it is possible to determine the adjusting shims for the differential assembly in a systematic way; in addition, this methodology aims to reduce rework in an assembly line by a bad shimming.

Palavras-chave : Backlash; differential assembly; least squares method; linear regression.