HVE series rotary transmission device adopts annular enveloping worm drive, multi-tooth meshing, large bearing capacity, stable transmission and small wear. The output shaft is supported by double fulcrums and large-span bearings, with small shaft runout, good sealing stability and long service life. The tooth surface hardening process is adopted, the tooth part is hard on the outside and tough on the inside, with strong impact resistance and minimal maintenance. Units can be customized according to project requirements.