195-15-42951 SPRING

Structure: mostly large compression coil springs, partially combined with hydraulic cylinders to form a track tensioning device.

effect:

Maintain track tension: The pre tension of the spring is used to maintain the appropriate tightness of the track, avoiding derailment caused by excessive looseness or increased wear caused by excessive tightness;

Buffer impact: When the bulldozer travels on uneven roads or encounters obstacles on the tracks, the spring absorbs the impact energy through compression deformation, reducing vibration damage to the driving wheels, sprockets, and final drive system, and protecting the walking mechanism.

Example: In the track tensioning device of the Xiaosong D65 bulldozer, the spiral spring and tensioning cylinder cooperate to automatically adjust the track tension and adapt to complex terrain.

Structure: Cylindrical compression coil spring, installed between the engine valve stem and cylinder head, partially using a double spring structure (nested inside and outside) to improve stability.

effect:

Valve reset: After the camshaft pushes open the valve, the spring force drives the valve to close, ensuring a tight fit between the valve and the valve seat to prevent gas leakage;

Suppressing resonance: The dual spring design can avoid valve resonance during high-speed movement, ensuring precise valve timing and improving engine efficiency.

Requirement: It is necessary to withstand the high temperature environment near the engine cylinder head (150-200 ℃) and maintain elasticity during high-frequency (thousands of times per minute) expansion and contraction. Therefore, high-strength spring steel (such as 50CrVA) is used for manufacturing.

Structure: It is mostly a disc spring or coil spring, installed between the pressure plate and the housing of the steering clutch. Some parts use a combination of multiple disc springs to enhance the preload force.

effect:

Clutch engagement: The pressure plate is pressed against the friction plate by the elastic force of the spring, so that the power is transmitted from the active part to the driven part, achieving the driving of the track;

Buffer power impact: When shifting or turning, the deformation of the spring can buffer the instantaneous torque change, reduce the wear of the friction plate, and make the steering operation smoother.

Example: In the steering clutch of a tracked bulldozer, the high stiffness characteristic of the disc spring ensures that the friction plate fits tightly, transmits large torque, and adapts to heavy-duty operations.

Structure: A small tension or compression coil spring installed on the linkage mechanism of control components such as brake pedals and clutch pedals.

Function: After the operator releases the pedal, the spring force returns the pedal to its initial position, ensuring the automatic reset of the control mechanism and improving the convenience of operation.