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Power takeoff
The PTO is a set of variable speed gears, also called power output devices. It is generally composed of a gear box and a clutch. It is connected with the transmission using gears. It is connected with the lifting pump shaft and is a separate file in the transmission. Bit, hang this file, add a throttle, lift pump can run. The lift pump is a hydraulic device that lifts the car box and implements the dump function. Special vehicles that require extra power, such as dump trucks, fire trucks, cement mixers, and refrigeration, are obtained through a power take-off device. The power take-off device is an additional device mounted on the outside of the gearbox. The power take-off device of the cement mixer is the clutch. On the housing), it takes power from one gear of the gearbox. The power on or off is controlled by a solenoid valve in the cab. The power take-off device drives the high-pressure oil pump for the dump truck, drives the water pump for the fire engine, drives the compressor for the refrigerating vehicle, and drives the hydraulic motor to rotate the stirring tank.
The power take-off is usually connected with a drive shaft or directly connected with a gear pump. In China, it is generally connected with a drive shaft. Few people design a direct connection with a gear pump. In Europe and North America, the design of the power take-off is various and varied. Power take-off manufacturers (eg Hydrocar of Italy, PZB, Muncie, etc., USA) have designed different interfaces at the power takeoff output to meet different types of interface requirements. The commonly used output interfaces are: DIN 5462, SAE "B" 2 & 4, SAE "C" 2 & 4, etc. The output flanges are generally DIN20, DIN10, SP1300, SP1400, etc. In Europe, the DIN 5462 interface is very common, and gear pump manufacturers will design according to this interface. In order to perfectly connect with the power take-off, the intermediate drive shaft is saved and space is reduced.
Most domestic power take-offs are used on dump trucks, so the requirements for power take-offs are relatively single. In Europe and North America, due to the high demand for power take-offs of special vehicles, power take-off manufacturers will design multi-output power take-offs or power take-offs with clutches. The power take-off control methods are also varied. They are: Mechanical control, hydraulic control, pneumatic control, vacuum source control, electronic control, etc., where the air control is more common.
In recent years, due to the rapid development of China's commercial vehicle market, some international professional power take-off manufacturers, such as: Interpap, Italy also landed in China. With the development of time, China’s power take-off devices will become increasingly diverse and specialized.