Swing fatigue test device

Abstract

The invention discloses a swing fatigue test device. The swing fatigue test device comprises a test piece loading mechanism used for fixing a test piece, a counterweight used for simulating a load which is vertically downward all the time, a flexible connection part whose upper and lower ends are fixedly connected with the test piece and the counterweight respectively, a drive mechanism used for outputting reciprocal rectilinear motions, a rotation amplifying mechanism used for converting the reciprocal rectilinear motions outputted by the drive mechanism into pendulum motions and carrying out amplification, a transmission mechanism used for transmitting the pendulum motions outputted by the rotation amplifying mechanism and driving the flexible connection part to carry out rocking motions so as to drive the test piece to carry out reciprocal rocking motions, and a restraint mechanism used for restraining the rocking motions which are transmitted by the flexible connection part to the counterweight into up and down motions. The swing fatigue test device has the characteristics of simple structure, low cost and convenient installation and the like and is capable of enabling a load to be more stable in rapid swinging in a process of a swing test and thus a phenomenon of destroying the test piece does not happen.

Description

technical field [0001] The invention particularly relates to a swing fatigue test device, which is mainly used in fatigue tests with heavy load, large swing angle, low swing frequency and long running time to complete the fatigue performance assessment of products. Background technique [0002] In public transportation tools such as high-speed rail and buses, rings or other handrail components are installed for passengers to use. During the movement of the car body, the rubber strip held by the lifting ring will swing. The maximum swinging frequency can be 1Hz, and the swinging angle is generally within ±30°. At the same time, the lifting ring will bear part of the body weight, which is about 25kg. vertical downward force. In order to ensure that the lifting ring can meet the use requirements within the life cycle, a fatigue test is required to test its reliability, so as to ensure the personal safety of passengers. [0003] The traditional test device mainly includes a br...

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