195-71-71120 ARM

Working principle: The boom cylinder extends and retracts to drive the working arm to lift and lower, driving the bucket to complete the cycle of "ground shovel loading → lifting → rotating unloading". The length and lifting angle of the working arm determine the working height and unloading radius of the bucket. For example, when unloading in a mine, a long working arm can unload materials to higher transport vehicles.
Structural adaptation: The bucket working arm is usually designed as a single or double section (the double section can be folded to reduce transportation size), and the arm strength needs to match the bucket capacity (usually 3-10m ³) to ensure that it does not deform during heavy loading.
Application scenarios: loading and transportation in earthwork engineering, short distance handling of mining materials, material collection during site leveling, etc.

Working principle: The working arm controls the soil entry angle and depth of the soil loosening device through an oil cylinder. After the soil loosening tooth tip contacts the ground, the working arm bears the crushing reaction force, converts the oil cylinder thrust into vertical soil entry force, and achieves soil fragmentation.
Structural features: The working arm of the soil loosening device is usually shorter and thicker, with an increase in arm thickness of 20% to 30%. The hinge point bushing has stronger wear resistance (suitable for high-frequency impact), and the oil cylinder connection seat is reinforced to withstand greater axial forces.
Application scenarios: Ground pre-treatment before road construction, topsoil stripping in mines, and hard soil fragmentation in farmland renovation.