Rear power output shaft (PTO, the most commonly used core)
1. Standard rear PTO shaft
The tail of the tractor extends the transmission shaft and is connected to agricultural tools such as rotary tillers, seeders, sprayers, straw returning machines, balers, and threshers through splines. It continuously rotates and outputs torque, directly driving the internal working mechanism of the agricultural tools.
There are two common national standards for rotational speed:
540 r/min: Standard for small and medium-sized tractors, suitable for most small and medium-sized agricultural machinery;
1000 r/min: High horsepower model, used for heavy-duty, high-speed equipment (large field returning machines, large pump sets).
2. Dual speed PTO
It can switch between two speeds of 540/1000 to meet the needs of different agricultural tools.
3. Synchronous PTO
The rotational speed is proportional to the driving speed of the tractor's rear wheels and is commonly used in seeders and transplanters to ensure accurate matching of the forward distance and seeding amount, and to increase the seeding amount synchronously with fast speed.
Traction power output (traction power output)
Relying on the tractor's own weight and tire grip, dragging agricultural tools through the traction rod without outputting rotational power, only providing pulling force:
Traction plow, disc harrow, grader, trailer, fertilizer spreader;
Only relying on tension to complete plowing, transportation, and land preparation operations, without transmission shaft power.
Hydraulic power output (driven by hydraulic oil pressure)
Relying on the tractor hydraulic pump to output high-pressure hydraulic oil, it is divided into two categories:
Single/multiple external hydraulic output valve group
External hydraulic oil pipe, driving hydraulic flipping plow, hydraulic dump trailer, hydraulic lifting and spraying rod, excavator, hydraulic shear, lifting equipment, can achieve lifting, flipping, stretching, and rotating actions.
Built in hydraulic suspension system (three-point suspension)
The standard three-point suspension mechanism at the rear of the vehicle relies on hydraulic cylinders to automatically lift and lower agricultural tools, controlling the depth of soil penetration and ground clearance, and is the basic supporting power form for mounting the vast majority of agricultural machinery.
Front power output
Front PTO shaft: The front end of the vehicle outputs rotational power and is equipped with front snow shovels, front lawn mowers, and front straw crushers;
Front hydraulic interface: equipped with a front loading bucket (loader accessory), used for digging soil, composting, loading and unloading grain sand and gravel.
Side mounted power output
Commonly used for narrow body tractors in orchards and greenhouses, with PTO or hydraulic interfaces extending from the side of the machine body, making it convenient to mount weeding and pruning machines laterally between rows of fruit trees, and suitable for narrow working spaces.
Belt pulley power output (old/auxiliary output)
The engine is equipped with an external belt pulley on the side, which drives the water pump, small generator, rice mill, and crusher through belt transmission. It belongs to a simple backup power mode, and the new tractor has gradually weakened.
Summary of Power Split Classification
Rotating power: front PTO, rear PTO, side PTO, pulley
Tensile power: Traction and drag
Hydraulic power: three-point suspension lifting, multi-channel hydraulic external oil circuit.
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