Fatigue test device of automobile sliding column assembly and experiment method thereof

Abstract

The invention relates to a fatigue test device of an automobile sliding column assembly and an experiment method thereof. Two ends of the sliding column assembly (2) are respectively connected onto an upper clamp (3) and a lower clamp (1). A hydraulic actuator (5) is connected with the sliding column assembly (2) through a guide device (4). When the hydraulic actuator (5) moves vertically, a spiral spring (21) and a damper of the sliding column assembly (2) can simulate the spiral spring in the automobile driving process to move vertically. A strain sensor is bonded to the outside of the spiral spring (2) of the automobile sliding column assembly to collect strain value of the spring, and a data collector collects displacement value and force value of the hydraulic actuator (5). The computer modifies value collected by the strain sensor and the data collector according to automobile sliding assembly road load spectrum collected by a road test and reproduces road test condition and environment on the fatigue test device after edition processing of the principle of sliding column assembly damage equivalence.

Description

technical field [0001] The invention relates to the technical field of automobile product testing, in particular to a fatigue test device and an experimental method for an automobile sliding column assembly. Background technique [0002] As a part of the automobile suspension, the strut assembly connects the body and the wheel steering knuckle, which plays the role of buffering and guiding. The durability of the normal function of the strut assembly plays an extremely important role in driving comfort and handling. . The longer fatigue life of the strut assembly can ensure a good driving experience for users and enhance the brand of the car. Therefore, at the initial stage of product development, it is particularly important to develop a test method for verifying the fatigue life of the sliding column assembly. [0003] At present, there is no fatigue test standard for strut assembly in the industry standard or national standard of automobile test. In the existing bench t...

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Problems solved by technology

[0004] The present invention designs a kind of fatigue test device and experimental method of automobile strut assembly, and the technical problem that it solves is that the strut assembly in the existing bench test standard is tested separately, is divided into shock absorber test, spring tests, etc., and shock absorber tests and spring tests are mostly single-stage equal-amplitude loading, which cannot guarantee the equivalent relationship with road tests or users.

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