Folding mechanism of plane working ladder
A technology of folding mechanism and working ladder, which is applied in the direction of aircraft parts, ground installations, transportation and packaging, etc., can solve the problems of large gap shaking, ladder arm shaking, poor safety, etc., to increase strength and rigidity, reduce relative effect of displacement and prolonging service life
Inactive Publication Date: 2014-10-29
SHAANXI AIRCRAFT CORPORATION
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Problems solved by technology
[0002] Due to the particularity of the use of the aircraft, special maintenance personnel are required, and the supporting working ladder generally needs to be carried together with the aircraft. The working ladder needs to be made into a device that is easy to lift, easy to fold, and takes up little space in the cabin. The bolt-hinge folding method is generally adopted, which consists of setting an ear fork on each folding part of the working ladder, which is fastened together by a manual nut, and the nut needs to be opened or tightened during operation. The disadvantage is that the working ladder of the bolt-hinge folding method bears When the weight of the worker is heavy, the gap between the fastening screws produces relative displacement, and the ladder arm shakes, which affects the rigidity of the ladder. The worker has a psychological shadow, and subjectively assumes that the strength of the working ladder is insufficient and the safety is poor; after long-term use, the gap becomes larger and shakes Increase the weight and reduce the service life of the working ladder
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[0011] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment: see figure 1 . A kind of aircraft working ladder folding mechanism, the concrete structural form of this mechanism is as follows figure 1 As shown, the mechanism includes an inner support arm 1, a limit block 2, a starting lock 3, an outer support arm 4, a support mechanism 5 and a limit mechanism 6, wherein the end of one end of the inner support arm 1 and the outer support arm 4 The head is round and thin-walled, and the arms at the other end are respectively fixedly connected to the upper and lower legs of the working ladder. The round thin-wall ends of the inner arm 1 and the outer arm 4 are hinged by a pin 7, and the round thin-wall end of the inner arm 1 There is an inner flange parallel to the direction of the pin shaft 7, and the inner flange is provided with a first notch 101 and a second notch 102 parallel to the direction of the p...
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The invention relates to the technical field of plane ground maintenance equipment, in particular to a folding mechanism of a plane ground maintenance working ladder. The folding mechanism of the plane working ladder is high in strength, high in rigidity, long in service life, easy to operate and capable of bearing a heavy load, and is a box-shaped part composed of an inner side supporting arm (1), a limiting stop block (2), a starting lock buckle (3), an outer side supporting arm (4), a supporting mechanism (5) and a limiting mechanism (6), wherein an end socket of one end of the inner side supporting arm (1) and an end socket of one end of the outer side supporting arm (4) are round thin walls. The structural strength is largely improved, and the folding mechanism of the plane working ladder is capable of bearing the heavy load and long in service life.
Description
technical field [0001] The invention relates to the technical field of aircraft ground maintenance equipment, in particular to a folding mechanism of an aircraft ground maintenance working ladder. Background technique [0002] Due to the particularity of the use of the aircraft, special maintenance personnel are required, and the supporting working ladder generally needs to be carried together with the aircraft. The working ladder needs to be made into a device that is easy to lift, easy to fold, and takes up little space in the cabin. The bolt-hinge folding method is generally adopted, which consists of setting an ear fork on each folding part of the working ladder, which is fastened together by a manual nut, and the nut needs to be opened or tightened during operation. The disadvantage is that the working ladder of the bolt-hinge folding method bears When the weight of the worker is heavy, the gap between the fastening screws produces relative displacement, and the ladder ...
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IPC IPC(8): B64F1/36B64F1/315
Inventor 朱建涛姚学荣史左敏王朋飞金利张剑孙榕冯燕胡筱红
Owner SHAANXI AIRCRAFT CORPORATION