PTO or Increase gear boxes are primarily applied to agricultural tractors where more hydraulic power is required than the system on the tractor can provide.
The quick release coupling upon the gear box attaches to the tractor PTO shaft and steps up the PTO speed to 1 much more suited to the efficient speed of a hydraulic pump. A Gear pump is suited to the other aspect of the apparatus box.
The Power Take-Off, mostly referred to by its acronym, PTO, is a common type of mechanical power delivery in the mobile machine marketplace. The PTO can be a way of transferring high power and torque from the engine (usually via the transmission) of trucks and tractors. In mixture with gearboxes and pump mounts, almost any type of mechanical power tranny is possible.
There are three common power take-away methods in the mobile machine market; tractor style, truck transmission design and engine crankshaft-driven, although the latter is not commonly referred to as a PTO. The crankshaft-driven method of power transmission is often used for hydraulic pumps mounted to the front of an on-highway vehicle, such as a plow/spreader or cement mixer. A small shaft with U-joints attaches to a yoke coupler to carefully turn the pump. This configuration of drive is not generally referred to as a PTO, however.
The tractor PTO goes back pretty much so far as tractors. Most early PTOs were powered from the transmitting, which being located at the back of the tractor, permits easy location of an output shaft. The transmission kind of PTO is engaged when the tranny clutch is also engaged, and is coupled directly to transmission, to ensure that when the clutch is certainly depressed, the PTO isn’t driven.
If the transmission is driving the wheels, then the transmission PTO is turning. This does mean the put into action can backward-power the transmission as well when the clutch is usually depressed, such as for example down a hill or if the attachment includes a system with high rotational inertia, leading to surging of the drive tires. This was prevented by the addition of a devoted overrunning clutch for the PTO, which prevents torque from getting applied in the opposite direction.
A live PTO often runs on the tranny clutch with two pto gearbox levels. The first stage of the clutch functions the driven portion of the transmitting, and the second stage of the clutch handles the engagement of the PTO. This method allows independent control of the transmission, so that the PTO maintains operation regardless of tranny clutch activity, which includes stopping of the tractor itself. For a tractor with a mower attachment, for example, this is a minimum requirement; you can’t have the mower turn off when you feather the clutch up a hill and around a tree.