Excavator track roller assembly is an important part of the excavator's walking system. The following is a detailed introduction to excavator track roller assembly products:

I. Main Types of Track Roller Assemblies
Track Shoes:
Function: Track shoes are the parts that contact the ground, i.e., the gripping parts.
Types: Include double-tooth track shoes, triple-tooth track shoes, triangular track shoes for wetlands, rubber track shoes, etc. Different types of track shoes are suitable for different working conditions and ground conditions.
Features: Track shoes usually have mud-shedding holes to facilitate mud shedding during travel.
Track Links:
Function: Connect the track shoes to form the track and withstand external impacts transmitted by the track shoes.
Features: Track links require high strength, certain toughness, and high wear resistance on the working surface. Common materials are 50Mn, 40MnB/40MnVB, 45 steel, etc., which are quenched and tempered by heat treatment, medium frequency quenching and low temperature tempering on the working surface, with hardness greater than or equal to 55HRC.
Track Pins and Bushings:
Function: Track pins are used to connect the track shoes and track links, while bushings reduce wear and provide sealing.
Features: In combination tracks, the track pins and bushings are interference fits, and assembly must be carried out on a press. Pin and bushing materials can use 20Mn and 25MnTiBR heat-treated carburizing, with hardness of 58-62HRC, to improve wear resistance.
Drive Wheel:
Function: Fixed to the travel motor, it transmits the driving force of the travel motor to the track through a gear structure.
Features: The drive wheel is subjected to cyclic load excitation during track operation and is prone to fatigue failure. Therefore, the shape, structure, and material of the drive wheel have a great influence on the life of the drive wheel.
Support Rollers, Guide Rollers, and Idler Rollers:
Function: Support rollers bear the weight of the machine and provide stable support for the machine's operation; guide rollers change the direction of the track and guide it; idler rollers support the track, allowing the track to rotate smoothly.
Features: These rollers usually use a bushing structure to reduce wear and improve durability.
II. Features and Requirements of Track Roller Assemblies
High Strength and Wear Resistance: Track roller assemblies need to withstand large loads and friction, so they must have high strength and wear resistance to ensure long-term stable operation.
Good Matching Accuracy: The matching accuracy between track roller assemblies directly affects the walking performance and stability of the excavator. Therefore, the dimensional accuracy and form and position tolerances must be strictly controlled during manufacturing.
Reliable Sealing Performance: The hydraulic and lubrication systems in the track roller assemblies require reliable sealing performance to prevent leakage and contamination.