Vacuum breaking device for vacuum generator

A vacuum breaking device for a vacuum generator, comprising a main housing, wherein the main housing is provided with an air supply port, a vacuum interface chamber and a vacuum generating chamber, an intake passage is arranged inside the main housing, a pilot valve controlled by an electromagnetic pilot valve assembly is arranged between the intake passage and the air supply port, the pilot valve comprises a pilot valve body, a pilot valve core and a pilot valve spring;

• a throttle pipe is arranged axially inside the main housing, a throttle passage inside the throttle pipe is interconnected to the intake passage, a pneumatic on-off valve is arranged between the vacuum interface chamber and the vacuum generating chamber and outside the throttle pipe, the pneumatic on-off valve comprises a slide core and a slide core spring, and a control chamber mated with an end surface of the slide core is arranged inside the main housing;
• the main housing is further provided with an exhausting chamber, and when the pneumatic on-off valve is opened, the exhausting chamber, the vacuum interface chamber and the vacuum generating chamber are interconnected;
• wherein the main housing is provided with an adjusting mechanism configured for adjusting an opening size of the throttle passage, the adjusting mechanism comprises an adjusting cover, a center of the adjusting cover is screwed with an adjusting core, and an adjusting nut is fixed to an outer end of the adjusting core;
• wherein the adjusting core is screwed with an adjusting pad on an inner side of the adjusting nut;
• wherein an inner end of the adjusting core is a reduced curved surface structure;
• and
• wherein a spring seat is arranged inside the adjusting cover, one end of the slide core spring is sleeved outside the spring seat.