Air throttle subassembly of carburetor

The utility model relates to an auto part, in particular to air throttle subassembly of carburetor. The utility model provides a following technical scheme: a piece that goes up and down that air throttle subassembly of carburetor including the solar term door -hinge of solar term door plant and drive solar term door plant, has offered cyclic annular mounting groove on the outer peripheral face of solar term door -hinge, and the solar term door plant is including at least two mutual concatenations and block the plate body in locating cyclic annular mounting groove, connects by the retaining member respectively between each plate body, and the axial one end department of solar term door -hinge is equipped with and drives the solar term door -hinge. Adopt above -mentioned technical scheme, provide that a liftable, leakproofness are good, simple structure's air throttle subassembly of carburetor.