General-purpose fastener automatic control screwing device of process for assembling drive axle assembly

Abstract

The invention relates to a differential mechanism sub-assembly for a vehicle driving axle assembly, bolts in a main reducing gear assembly, and a fastening device of a nut type fastener. In order to finish the automatic tightening operations on the differential mechanism sub-assembly, the bolts in the main reducing gear assembly and a nut, the invention provides a universal fastener automatic control tightening device used in the assembling process of the driving axle assembly. The tightening device comprises a horizontal rotary operating board which is driven to ascend and descend by a lifting mechanism and is provided with a servo tightening mechanism, a tightening operating head, and a counter torque balance positioning head which keeps certain adjustable center distance with the servo tightening mechanism; and a driver of the servo tightening mechanism is connected with a communication interface of an electronic control unit. The technical proposal eliminates personal factors and the disturbing influence under the action of the counter torque in the assembly process to the utmost extent so as to ensure that the product technical requirement is used as a standard to improve the operation quality for the assembling production of the driving axle assembly and improve the operational efficiency.

Description

technical field [0001] The patent application of the present invention relates to an operating device for tightening bolts and nuts in the differential sub-assembly and the final drive assembly in the assembly process of the automobile drive axle assembly. Background technique [0002] One of the key quality characteristics of the finished product of the automobile drive axle assembly is to effectively control the tightening torque value of the bolts and nut fasteners in the assembly of the differential sub-assembly and the final drive assembly and make it reach the product level. skills requirement. The differential sub-assembly and the main reducer assembly are the core components of the automobile drive axle. The differential sub-assembly is divided into two types of assembly structures: integral type and split type according to the number of inner planetary gears and the installation method. The differential case is directly fastened to the driven gear by a set of bolts...

AI Technical Summary

Problems solved by technology

[0003] Because the assembly line of the drive axle assembly adopts a multi-variety collinear production mode in turn, and the installation spacing of the bolts and nuts of different structural types of differential sub-assemblies and final reducer assemblies is also diverse, resulting in bolts and nuts tightening operations The process is not the same, so if the assembly of the two core components meets the product technical requirements, it will bring considerable difficulty

At present, in the automobile axle industry, there are still more technical operation methods in which the production line operators hold pneumatic wrench to tighten the bolts and nuts, and then check the tightening torque value with the indicator wrench. This method is mainly based on the operator's work experience. It often happens that the tightening torque of the bolts and nuts is too large or too small and must be reworked. However, tightening the bolts and nuts for many times will easily destroy the precision of the thread fit and cause technical problems of potential failure modes, and the production efficiency is also very low. Especially in the assembly of the drive axle assembly of medium and heavy vehicles, due to the high tightening torque value of the bolts and nuts, the torque that acts on the hands of the operator is very large, which increases the difficulty of the operator's operation precision control, and its work intensity is also high. very big

[0004] To sum up, the existing automobile drive axle assembly process operation method cannot guarantee the assembly quality of its core components and the technical requirements of high production efficiency

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