System and method for measuring and selecting drive gear installation distance adjusting shim of separated main gearbox assembly

Abstract

The invention relates to a method and a system for selecting and measuring driving gear mounting distance adjusting shims of a driving gear pair and a driven gear pair in a core component, namely an up-and-down split-type main reducer assembly of an automobile driving bridge assembly. The selecting and measuring system comprises an online monitoring first detection station, a second detection station of a driving gear bearing pedestal subassembly, and an electronic control system, wherein the first detection station is a displacement sensing detection station of axial data of a main differential case and adopts a displacement station device which is shifted to an online follower fixture; the second detection station is a displacement sensing detection station of axial data of a driving gear inner bearing, a driving gear outer bearing and a driving gear bearing pedestal; and the electronic control system obtains corresponding data values respectively through acquisition and conversion of an axial data signal acquisition channel of the main differential case and an axial data signal acquisition channel of a driving gear bearing pedestal assembly, and obtains the thickness Ln of the driving gear mounting distance adjusting shims by calculation through a determined mathematic model. The technical proposal realizes online monitoring in a real sense, simultaneously suppresses interference of personal factors, reduces the measuring variation, and improves the measuring precision.

Description

technical field [0001] The present invention relates to a method for measuring and selecting the installation distance adjusting gasket of the active gear of the main and passive gear pairs in the upper and lower separated main reducer assembly, which is the core component in the drive axle assembly of the automobile, and a system device for realizing the measuring and selecting method . Background technique [0002] The main body of the automobile drive axle assembly includes the differential sub-assembly, the core components of the final reducer assembly, the axle shaft, the axle housing, the wheel hub, the brake drum and the brake and other main components. The assembly quality of main reducer assembly and differential sub-assembly is a key item that affects the comprehensive quality of automobile drive axle assembly products. At present, the measurement selection of the driving gear installation distance adjusting gasket of the driving and passive gear pairs is still at...

AI Technical Summary

Problems solved by technology

At present, the measurement selection of the driving gear installation distance adjusting gasket of the driving and passive gear pairs is still at the technical level of off-line matching, especially the upper and lower split main reducer assembly, due to its unique product structure characteristics, in the assembly In the process, in the selection procedure of the driving gear installation distance adjusting gasket, the main reducer housing, the driving gear bearing seat and the corresponding bearing outer ring should be press-fitted to form an assembly, and then the relevant dimensions should be measured respectively, so that the assembly can be measured at the press-fitting station. Cross-shifting between stations and going up and down the assembly line many times, it is very easy to cause potential failure modes due to bumps on the surface of the component to be installed, and the production efficiency is low

In addition, the excessive participation of human factors in the existing assembly operations often leads to the emergence of unqualified products that must be reworked in a timely manner; moreover, the existing off-line matching technology will also cause the active and passive gears that must be paired to be used only Work can be moved to the assembly line of the differential sub-assembly and the assembly line of the main reducer assembly for combined assembly. It is likely that the driving gear and the passive gear assembled in the same main reducer assembly will be mixed and the best contact cannot be obtained. Assembling Technical Problems of Area Engagement Accuracy

[0003] To sum up, the existing off-line detection and assembly techniques are difficult to guarantee the assembly quality of the automobile drive axle assembly, and the production efficiency is also relatively low

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