Convenient assembling and disassembling axis structure of coaxial double-paddle reversal model helicopter

Abstract

The invention discloses a convenient assembling and disassembling axis structure of a coaxial double-paddle reversal model helicopter. The structure mainly consists of an inner shaft and an outer shaft; the outer shaft passes through an upper outer pipe sleeve, a lower rotor wing shaft head, a lower outer pipe sleeve, an outer shaft upper bearing, a frame and an outer shaft lower bearing in turn from top to bottom; two ends of the outer shaft are connected with an inner shaft bearing sleeve and an upper gear respectively; the inner shaft passes through an inner shaft upper bearing, an inner shaft bearing sleeve, the outer shaft, an inner shaft lower bearing, a lower gear and a lower gear lock sleeve in turn from top to bottom; the inner shaft is fixed by a lower gear lock sleeve screw; the outer shaft is a regular prism; and the lower rotor wing shaft head, the upper gear and the matched hole of the outer shaft form an equilateral polygon matched with the regular prism. The structure ensures synchronous rotation of the lower rotor wing shaft head and the outer shaft, saves an attached fastener, and improves the safety and reliability of operation; and the simplified structure is easier for assembly and disassembly, and is convenient for the juvenile to learn and master the knowledge of the model helicopter.

Description

technical field [0001] The invention relates to a model helicopter, in particular to a convenient disassembly and assembly axis structure of a coaxial double-blade reversing model helicopter. Background technique [0002] The axis structure (see Figure 5 ) includes frame, outer shaft upper bearing, outer shaft lower bearing, circular outer shaft, outer shaft lock sleeve, lower rotor shaft head, lower rotor shaft head screw, inner shaft bearing sleeve, inner shaft upper bearing, inner shaft, upper Gears, inner shaft lower bearing, lower gear, lower gear lock sleeve and lower gear lock sleeve screws. This axial structure has the following disadvantages: [0003] 1. Difficult to assemble and not safe [0004] Because the inner hole of the lower rotor shaft head and the hollow outer shaft are all circular (see Figures 6 to 8 ), the synchronous rotation of the two needs to be fixed by the lower rotor shaft head screw, so the assembly operation is more difficult. First, inse...

AI Technical Summary

Problems solved by technology

In addition, if the screws screwed in are not tight enough or the screw holes are not aligned, there will be dangers such as parts falling off during high-speed rotation, causing damage to the model helicopter, or even crashing.

[0005] 2. Difficult to disassemble

[0006] When replacing accessories for disassembly, on the one hand, there are many screws to be removed; on the other hand, because the screw holes on the hollow outer shaft have been lashed when the screws are tapped in the initial installation, if it is not treated, those and the hollow outer shaft are just right The matching bearings and other parts cannot pass through the edge and cannot be disassembled, so the edge must be filed off with a file

Such complicated operations cause troublesome disassembly and are not easy to master

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