A steering-switching and hands-changing assembly for a pneumatic tool comprising:
- a switching set having
- a selector valve being hollow and having
- a front end having an outer side;
- a rear end;
- an external surface;
- a valve hole formed through the external surface of the selector valve adjacent to the rear end of the selector valve;
- and
- an engaging seat axially formed on and protruding from the outer side of the front end of the selector valve;
- and
- a switching stem detachably connected to the selector valve and having
- an engaging claw selectively engaging with the engaging seat of the selector valve and having
- an inner side facing the outer side of the front end of the selector valve;
- an outer side;
- an external surface;
- a notch formed through the outer side and the inner side of the engaging claw;
- and
- an engaging recess formed in the outer side of the engaging claw, and communicating with the notch to form an annular structure at the outer side of the engaging claw with the notch;
- and
- a toggle arm formed on and protruding outwardly from the external surface of the engaging claw and being opposite to the notch of the engaging claw;
- a speed-adjusting set connected to the switching set and having
- a speed button movably and rotatably connected to the switching stem and having
- a mounting tube extending into the selector valve via the engaging seat and having
- an external surface;
- an inner end mounted in the selector valve via the engaging seat;
- and
- an outer end extending out of the selector valve in front of the outer side of the engaging claw via the engaging seat;
- and
- a rotating tray connected to the external surface of the mounting tube at the outer end of the mounting tube in front of the outer side of the engaging claw, and having
- an inner side facing the outer side of the engaging claw;
- an outer side;
- and
- an engaging flange being annular, axially formed on and protruding from the inner side of the rotating tray around the mounting tube, and mounted in the annular structure of the engaging claw that is formed by the notch and the engaging recess;
- and
- a trigger set connected to the switching set and the speed-adjusting set, and having
- a trigger rod mounted through the selector valve, the switching stem, and the speed button, and having
- an inner end;
- and
- an outer end extending in front of the outer side of the rotating tray via the selector valve and the mounting tube;
- a trigger connected to the outer end of the trigger rod in the front of the speed button;
- and
- an elastic element mounted around the trigger rod that extends out of the speed button, and abutting the rotating tray and the trigger;
- wherein a distance is formed between the rotating tray of the speed button and the trigger, and the rotating tray abuts the engaging claw by an elastic force of the elastic element, and the engaging flange of the rotating tray is mounted between the engaging recess and the notch of the engaging claw to maintain the distance between the rotating tray of the speed button and the trigger.