Fatigue life tester of dynamic load of working ladder of military aircraft

Abstract

The invention, which belongs to the detection equipment field, relates to a fatigue life tester of a dynamic load of a working ladder of a military aircraft. The tester is provided with a ladder hanging rack. A fixed frame is installed at one side of the ladder hanging rack; horizontal sliding rails are arranged at the two sides of the fixed frame; and a horizontal movable frame is installed on the horizontal sliding rails and is controlled by a horizontal variable frequency motor, a horizontal gear chain, and a limiting block to move horizontally on the horizontal sliding rails. Besides, longitudinal sliding rails are arranged vertically at the two sides of the horizontal movable frame; a longitudinal moving frame is installed on the longitudinal sliding rails and is controlled by a longitudinal variable frequency motor, a longitudinal gear chain, and a positioning block to move longitudinally on the longitudinal sliding rails. The lower side of the front end of the longitudinal moving frame is hinged with the middle part of a loaded lever; the rear end of the loaded lever is hinged to an electric push rod; a loading head is installed at the front end of the loaded lever by a pressure sensor; and an infrared counter is installed at the loaded lever.

Description

technical field [0001] The invention relates to the field of testing equipment, in particular to a dynamic load fatigue life testing machine for military aircraft working ladders. Background technique [0002] As we all know, at military airports, pilots and maintenance personnel often use working ladders with various functions such as boarding ladders, ground working ladders, and fuselage maintenance ladders. Due to the high frequency of use of military aircraft working ladders and long life expectancy (about 30 years), the use status, safety performance and fatigue life of working ladders are directly related to the personal safety of pilots and maintenance personnel. Since modern warfare has the characteristics of fast response, light equipment, and quick transition, ground support equipment is also required to be light and easy to carry. The lightweight of the working ladder must be optimized in terms of structural design, multi-purpose in terms of use, and lightweight ...

AI Technical Summary

Problems solved by technology

At present, the troops mostly use light non-metal composite material working ladders and aluminum alloy working ladders. However, there is no fatigue life detection technology for ladders in the prior art, which cannot effectively guarantee the safety of ladders, and cannot effectively and timely check the ladder structure. Fatigue and service life managed

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