Advantages of harmonic drive reducer:
(1) The transmission speed ratio is large. The range of single-stage harmonic gear transmission speed ratio is 70-320, which can reach 1000 in some devices, and the multi-stage transmission speed ratio can reach more than 30000. It can be used not only to slow down, but also to increase the speed.
(2) High bearing capacity. This is because there are many teeth meshing at the same time in harmonic gear drive, and the number of teeth meshing at the same time in dual wave drive can reach more than 30% of the total number of teeth. Moreover, the flexible wheel adopts high-strength materials, and there is face contact between teeth.
(3) High transmission accuracy. This is because there are many teeth meshing at the same time in harmonic gear drive, and the error is averaged, that is to say, multiple teeth meshing has mutual compensation effect on the error, so the transmission accuracy is high. In the case of the same gear accuracy grade, the transmission error is only about 1 / 4 of the ordinary cylindrical gear transmission. At the same time, the radius of the wave generator can be changed slightly to increase the deformation of the flexible wheel so that the backlash is very small, or even no backlash engagement can be achieved. Therefore, the transmission clearance of the harmonic gear reducer is small, which is suitable for reverse rotation.
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