Safe landing device adopting permanent magnets variable in magnetic field and magnetorheological fluids variable in area

Abstract

The invention discloses a safe landing device adopting permanent magnets variable in magnetic field and magnetorheological fluids variable in area. The safe landing device is characterized by comprising a base, a worm, a worm wheel, winding drums and a deceleration descending device, the worm wheel and the worm are meshed together, the right end of the worm is connected with the winding drums, thedeceleration descending device is located on one side of the worm, and comprises a first shell, a second shell, a screw, a rotating disc and a moving disc, the two ends of the screw are connected with the first shell and the second shell correspondingly, moreover, the screw is connected with the worm wheel, the rotating disc is close to the second shell, the moving disc and the screw are meshed together, a sealing ring is arranged between the rotating disc and the moving disc, the portion among the first shell, the second shell, the rotating disc, the moving disc and the sealing ring is filled with the magnetorheological fluids, and one permanent magnet is arranged on each of the sides, deviating from each other, of the rotating disc and the moving disc. The safe landing device has the advantages that the structure is simple, the landing distance is large, moreover, adjustment can be performed according to actual conditions, the adaptability is higher, the comfort is good, moreover, the safety is higher, and the stability is better.

Description

technical field [0001] The invention relates to the field of high-altitude escape emergency equipment, in particular to a permanent magnet variable magnetic field variable area magnetorheological fluid safety landing device. Background technique [0002] In recent years, there are more and more high-rise buildings in cities, and stairs or elevators cannot be used when an emergency such as a fire or the like occurs in a high-rise building such as an apartment house, a hotel or a hospital. In order to deal with such a situation, people have designed various emergency escape devices. The current escape devices mainly adopt two driving modes: electric drive and pure mechanical drive; , mainly composed of rope, sleeve, deceleration adjustment screw, adjustment hole, pin shaft, safety handle, hook, safety belt, it uses the friction between the safety handle and the rope to control the escape speed, and is mainly used for high-rise escape. Chinese patent CN 102049110 A discloses a...

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of low landing safety, poor landing stability, fixed landing distance and poor adaptability of existing escape devices, and provide a permanent magnet variable magnetic field variable area magnetorheological The hydraulic safety landing device has a large landing distance and can be adjusted according to the actual situation. It has stronger adaptability, better comfort, higher safety and better stability.

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