The utility model belongs to the technical field of power
takeoff devices, and relates to an air bag type
piston gear shifting power
takeoff device. When the power
takeoff needs to be in gear operation, air is sucked outwards through the first ventilation
nozzle, negative pressure is formed in the rear
air chamber, the reset type air bag
piston assembly moves towards one side of the rear
air chamber, the reset type air bag
piston assembly drives the shifting fork shaft and the shifting fork to move, the shifting fork controls connection of a
power component, and gear engagement of the power takeoff is completed. When the power takeoff does not need to work, the first ventilation
nozzle is disconnected with the air suction device, the air pressure on the two sides of the front
air chamber and the air pressure on the two sides of the rear air chamber are equal, the reset type air bag piston
assembly drives the shifting fork shaft to return to the original position, the shifting fork returns to the initial position, the shifting fork controls separation of power components, and gear picking is completed.
Reciprocating motion of the piston is achieved through external air exhaust and self-resetting air inflation of the air cylinder, dependence on an air storage cylinder of the whole vehicle is not needed, the air cylinder is suitable for light and medium-sized vehicles, gear shifting efficiency and reliability are improved, the structure of the air cylinder and the piston is simplified, and production cost is reduced.