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Speed-variable transmission mechanism of small single-rotor unmanned helicopter

An unmanned helicopter and variable speed transmission technology, applied in the field of transmission system, can solve the problems of low transmission efficiency, complex structure, loud noise and other problems of the transmission system, and achieve the effects of ensuring safety and reliability, reducing interference and reducing energy loss

Inactive Publication Date: 2016-03-16
衡阳云雁航空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of low transmission efficiency, high noise, large vibration and complex structure of the transmission system of the existing small single-rotor unmanned helicopter with tail rotor

Method used

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  • Speed-variable transmission mechanism of small single-rotor unmanned helicopter
  • Speed-variable transmission mechanism of small single-rotor unmanned helicopter
  • Speed-variable transmission mechanism of small single-rotor unmanned helicopter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 Shown: small single-rotor unmanned helicopter speed change transmission mechanism, including engine 1, gearbox and wake box 3 (installed on the frame of unmanned helicopter), primary transmission mechanism, tail rotor mechanism, propeller mechanism and tensioning mechanism wheel mechanism.

[0023] The gearbox (installed on the frame of the unmanned helicopter) includes a box base 21 and a box loam cake 22, and the box loam cake 22 is sealed and installed on the box base 21 and forms an inner chamber 23 with the box base 21.

[0024] One-stage transmission mechanism comprises front synchronous wheel 41, rear synchronous wheel 42, primary shaft 43, input gear 45 and tail front wheel 46 (as figure 2 shown). The front synchronous wheel 41 is associated with the crankshaft 11 of the engine 1 through the clutch assembly, the front synchronous wheel 41 drives the rear synchronous wheel 42 to rotate through the belt 47, the rear synchronous wheel 42 is set and...

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Abstract

The invention discloses a speed-variable transmission mechanism of a small single-rotor unmanned helicopter. The speed-variable transmission mechanism of the small single-rotor unmanned helicopter comprises an engine, a transmission box and a tail gear box, wherein the transmission box comprises a box base and a box upper cover; the box upper cover is sealed and mounted on the box base; an inner cavity is formed between the box upper cover and the box base; the speed-variable transmission mechanism also comprises a first-stage transmission mechanism, a tail rotor mechanism and a propeller mechanism. The speed-variable transmission mechanism of the small single-rotor unmanned helicopter has the advantages that a transmission system only has second-stage transmission, and tail rotors and propellers gain power from the second-stage transmission; compared with three-stage transmission of the speed-variable transmission mechanism of the small single-rotor unmanned helicopter in the prior art, the transmission grade number is reduced, the transmission noise is reduced, the transmission efficiency is improved, the parts are reduced, the weight is reduced, and the load of the engine during the flight is reduced. The transmission box part only comprises the first-stage transmission, so that the vibration during running is reduced; the interference of the vibration on electronic equipment is reduced; the safety and reliability of the flight is guaranteed.

Description

technical field [0001] The invention relates to a transmission system, in particular to a variable speed transmission mechanism of a small single-rotor unmanned helicopter. Background technique [0002] Unmanned helicopters have the advantages of flexible maneuverability, convenient take-off and landing, hovering in the air, and controllable flight speed. They are widely used in military, agricultural, and civilian fields. [0003] At present, the ultra-low-altitude small single-rotor unmanned helicopter with tail rotor is powered by a small double-cylinder opposed air-cooled engine, and its variable speed transmission system transmits power to the gearbox through a belt drive (one-stage speed change). And the three-stage speed change mechanism, the main rotor and the tail rotor obtain power from the two-stage and three-stage speed change respectively. [0004] The disadvantage of the variable speed transmission system is that the number of transmission stages is as high as...

Claims

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Application Information

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IPC IPC(8): B64C27/12
CPCB64C27/12B64C2027/125
Inventor 王国初李宝进李兆志
Owner 衡阳云雁航空科技有限公司
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