Sector gear drive mechanism for generating sweeping rotary motion about two perpendicular axes

A sector gear drive mechanism for generating sweeping rotary motion about two perpendicular axes, comprising:

• a horizontal channel assembly;
• a first horizontal transmission frame and a second horizontal transmission frame made of aluminum alloy and machined with a specific profile, wherein a lower portion is widened to increase base area, and a body portion is tapered and hollowed to allow large sweeping angles without mechanical interference, the transmission frames being configured to mount meshing gear pairs, a motor, and position sensors;
• a horizontal gear transmission assembly comprising five gear stages including first, second third, fourth and fifth meshing gear pairs arranged sequentially from a base portion to an upper portion of the horizontal channel assembly, wherein a first gear of the first gear pair is directly coupled to a horizontal motor and a second gear of the fifth gear pair is coupled to a vertical channel assembly, such that rotation of the horizontal motor is transmitted to the vertical channel assembly through the meshing gear pairs;
• wherein the second gear of the fifth gear pair comprises a shaft portion coaxially mounted with a position sensor assembly for determining angular position of the vertical channel assembly during horizontal rotation, and a gear portion configured to mesh with the first gear of the first gear pair;
• a vertical channel assembly comprising mechanical components, a vertical motor, and a vertical gear transmission assembly configured to generate motion along a vertical channel;
• wherein the vertical gear transmission assembly comprises five gear stages including including first, second third, fourth and fifth meshing gear pairs, and is configured with two shaft-support gear groups to optimize transmission space, wherein a first gear of the first meshing gear pair is directly coupled to the vertical motor and a second gear of the fifth meshing gear pair is coupled to the vertical channel assembly;
• and a vertical transmission cover made of stainless steel and configured to mount bearings, ensure accurate center distances between meshing gear pairs, and partially shield the vertical gear transmission assembly from contaminants;
• wherein the motor is a compact DC motor configured to generate rotary motion of the vertical channel assembly.