Fatigue testing device for astronautical folding dining table switching time

Abstract

The invention relates to a fatigue testing device for an astronautical folding dining table switching time. The device is characterized by comprising an experimental framework which is used for simulating a capsule wall, a rack, a switching mechanism and a PLC control module, a folding dining table is installed on the experimental framework through a hinge, the rack is fixedly connected with the switching mechanism, the switching mechanism comprises a servo motor, a lead screw, a sliding block and a connecting rod, the servo motor is connected with the lead screw, the lead screw is slidably connected with a sliding block, a linear guiding mechanism is formed by the lead screw and the sliding block, the sliding block is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to a testing member, and the servo motor is connected with the PLC control module. The fatigue testing device has the advantages that a mechanical mechanism is combined with PLC control, the switching on and off of the folding dining table by a worker can be simulated, automatic testing is achieved, manual operation performed by the worker is replaced, labor cost is reduced, testing risks are reduced, testing purposes are achieved to help extensive production application, and the fatigue testing device has significant production practical meanings.

Description

technical field [0001] The invention belongs to the testing field of mechanical components, and in particular relates to a fatigue test device for switching times of an aerospace folding dining table. Background technique [0002] At present, the fatigue test is a test to measure the service life of the product under the specified use and maintenance conditions, predict or verify the weak links and dangerous parts of the structure, and to assess the improvement of the product to ensure the reliability of the product during use. and stability. [0003] Such as image 3 As shown, the aerospace folding dining table is composed of a desktop, long armrests, short armrests, hinges, folding support rods, locking switches, etc. Pull the dining table from the state parallel to the bulkhead to the state of the dining table parallel to the ground and automatically fix it to open; unlock the lock of the dining table, and pull it from the state parallel to the ground to the state of the...

AI Technical Summary

Problems solved by technology

For similar aerospace folding dining tables, it is necessary to test its switching times to verify whether the service life of the mechanism meets the design requirements. However, there is currently no device that can conveniently and reliably perform fatigue tests on opening and closing folding dining tables. service life, to meet the fatigue test requirements of the folding dining table

In most cases, the life test is performed manually, which is time-consuming, labor-intensive and inefficient.

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