Three-point linkage suspension system

The three-point hitch, often abbreviated as TUZ (Three-point Hitch), is commonly used in agricultural tractors. This system allows for easy connection and disconnection of agricultural implements and machines, while ensuring stability and control over them during operation.

Construction of the three-point linkage:

Lower arms (side arms):

• Two lower arms that are attached to the rear of the tractor and extend to the implement.
• They are adjustable in length and angle to fit a variety of tools.

Upper arms (upper links):

• One top link that connects to the tool at a central point.
• Adjustable in length to set the proper angle of the implement to the tractor.

Attachment points:

• Each arm (two lower and one upper) is terminated with attachment points that fit the corresponding pins on agricultural implements.
• These pins are standard, allowing for quick attachment and detachment of implements.

Hydraulic lift cylinders:

• Hydraulic cylinders mounted on the lower arms which allow the implement to be raised and lowered.
• Controlled from the tractor cab, they enable precise adjustment of the implement height.

Functions of the three-point linkage:

Connecting tools:

• It enables easy and quick connection and disconnection of various agricultural implements such as ploughs, seeders, cultivators, fertilizer spreaders, etc.

Tool stabilization:

• Ensures the stability of tools during operation, minimizing their lateral movement and vibration.

Adjusting tool positions:

• It enables precise adjustment of the height and angle of tools, which is crucial for their efficient operation.
• Possibility to lift tools for transport and lower them during work.

Operation of the three-point linkage:

Connecting the tool:

• The tool is connected to the lower arms and upper link via pins.
• Make sure all attachment points are secure.

Arm length adjustment:

• Adjust the length of the lower arms and upper link to ensure proper tool positioning.
• Possibility to adjust the angle of attack of the implement relative to the soil.

Raising and lowering the tool:

• Using hydraulic lift cylinders to raise the implement for transport or lower it during operation.
• Implement height control using the hydraulic system from the tractor cab.