Fuel tank bracket assembly multi-axis loading test stand and endurance test method

Abstract

The invention discloses a fuel tank bracket assembly multi-axis loading test stand and an endurance test method. The test stand comprises loading devices fixed on an iron floor and a fuel tank bracketassembly connection frame. The connection frame connects the loading devices and a fuel tank bracket assembly into a multi-axis loading system. The loading devices comprise one longitudinal loading device, three vertical loading devices and two side loading devices. Through coordinated movement of the six loading devices, space six-degree-of-freedom motion of the fuel tank bracket assembly is realized. Compared with the prior art, the method, with a test field reinforced road load spectrum signal being a target, and through a simulative iteration mode, can realize true reappearance of space six-degree-of-freedom vibration state and stress state of the fuel tank bracket assembly under a real vehicle working condition in a test room, and further realizes endurance test and test authentication of the fuel tank bracket assembly. In the product development process, test cycle can be reduced greatly, weak spots can be found earlier, and research and development cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of performance testing of automobile products, and in particular relates to a multi-axis loading test bench for a fuel tank bracket assembly and a durability test method. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of living standards, people have higher and higher requirements for the performance of automobile products, and the high reliability of the complete vehicle and its parts is an important symbol of modern automobiles. [0003] The automobile fuel supply system is the source of automobile power. Among them, the fuel tank bracket assembly supports the quality of the fuel tank. Once it breaks, it will directly cause the fuel tank to fall off, interrupt the power source, and easily cause traffic accidents, especially for poor driving conditions. For engineering vehicles, the impact of the road surface is large, and the working e...

AI Technical Summary

Problems solved by technology

[0006] So far, the domestic automobile industry's evaluation method for the durability test of the fuel tank bracket assembly is mainly to monitor during the vehicle road test and proving ground test, which is time-consuming and laborious, and the repeatability is poor, which affects the product development process; the indoor bench test is only It is possible to test the static strength or static stiffness of the fuel tank bracket assembly, and there is no test bench for testing the durability of the fuel tank bracket assembly

The system disclosed in Patent Document 1 can only realize the static stiffness test of the fuel tank bracket assembly; the system disclosed in Patent Document 2 is only for the axle assembly multi-axial loading endurance test bench, and only realizes the freedom of axle assembly 3 There is still a certain difference between the motion state of the exhaust system and the actual motion state of the axle assembly; the system disclosed in Patent Document 3 only realizes the loading of the exhaust system in two directions, and there is no load input in the actual driving condition. There are differences from the real motion state of the exhaust system

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