Plunger lifting mechanism of a rotary-valve gas carburetor

摘要

A plunger lifting mechanism of a rotary-valve gas carburetor includes a carburetor body, a cam, a plunger, a torsion spring, a fixed plate, a throttle wire bracket, a main measuring needle, a sleeve and a main jet pipe. The plunger is rotatablely mounted in the carburetor body, which passes through the cam, the torsion spring and fixed plate in turn and then extends out of the carburetor body, and a top of the plunger is connected with the throttle wire bracket and then fixedly connected with the sleeve; the fixed plate is fixedly connected with the carburetor body; one end of the torsion spring is elastically suppressed by the fixed plate, and the other end of the torsion spring is elastically suppressed by protrusions on side walls of the plunger. The configuration can ensure sufficient flexibility of its plunger and improve the reliability of the carburetor.

主权项

1. A plunger lifting mechanism of a rotary-valve gas carburetor comprising a carburetor body (1), a cam (2), a plunger (3), a torsion spring (5), a fixed plate (6), a throttle wire bracket (7), a main measuring needle (8), a sleeve (9) and a main jet pipe (10);
wherein the cam (2) is connected in the carburetor body (1), and a through hole is defined at a center of the cam (2) to allow the plunger (3) to pass, the cam (2) has a top surface that is a spiral surface including two identical and symmetrical spiral sub-surfaces; the plunger (3) is rotatablely mounted in the carburetor body (1), which passes through the cam (2), the torsion spring (5) and fixed plate (6) in turn and then extends out of the carburetor body (1), and a top of the plunger (3) is connected with the throttle wire bracket (7) and then fixedly connected with the sleeve (9); the fixed plate (6) is fixedly connected with the carburetor body (1); one end of the torsion spring (5) is elastically suppressed by the fixed plate (6), and the other end of the torsion spring (5) is elastically suppressed by protrusions on side walls of the plunger (3); the plunger (3) is provided with two pins on each of which a roller (4) is mounted, and the two rollers (4) are contacting with the two spiral sub-surfaces of the cam (2); the main measuring needle (8) sleeved with a spring (12) is fixed in the plunger (3), which is cooperated with the main jet pipe (10) to constitute an injector.