Patent ID: 8888457
Filing Date: 2014-11-18
Classification: A63H

Abstract:
1. A dual-rotor model helicopter control system, comprising: a power control mechanism; a transmission mechanism; a control mechanism; and a rotor mechanism controlled by the power control mechanism through the transmission mechanism and the control mechanism; wherein the rotor mechanism includes a main shaft, an upper rotor and a lower rotor that are installed coaxially on the main shaft in an up and down manner and controlled respectively by an inner shaft and an outer shaft for rotation; wherein the control mechanism includes a Bell self-balance mechanism to control the upper rotor and a Bell-Hiller control structure to control the lower rotor; and wherein the transmission mechanism includes a slant rotary disk and a first linkage bar mechanism which bridges the slant rotary disk and the lower rotor and includes a first lower linkage bar connecting to the slant rotary disk, a first upper linkage bar connecting to the lower rotor and a first lever mechanism pivoting on the main shaft and including a long arm connecting to the first lower linkage bar and a short arm connecting to the first upper linkage bar, such that the slant rotary disk controls the lower rotor through the first linkage bar mechanism; and wherein the inner shaft and the outer shaft of the main shaft are rotated by power provided from an electric apparatus through a speed changing mechanism to rotate in opposite directions; wherein the speed changing mechanism includes a main active gear fixed on the spindle of the electric apparatus, a belt gear including a pinion and a small pulley that rotate coaxially, a large gear fixed on the outer shaft, a large pulley and a synchronous belt fixed on the inner shaft; the large gear being engaged with the pinion, the synchronous belt being coupled on the large pulley and the small pulley, the main active gear driving the large gear and the large pulley to rotate in apposite directions through the belt gear.