Xu Gongda Gear 231200117 (XDH080J. 02-5) Detailed Description
Basic Information

Part Name: Bull Gear/Driven Gear

Part number (P/N): 231200117

Drawing number (Dwg No.): XDH080J.02-5

Compatible model: XCMG XDH080J 0.8-ton micro hand-held double drum vibratory roller

Installation position: Inside the walking gearbox or vibrating wheel reducer (usually paired with the small gear 231200114 for meshing)

function and role

This large gear is the core driven component of the XDH080J roller transmission/reduction system. It meshes with a small gear (Pinion) to form a gear pair, converting the high-speed low torque power input by the hydraulic motor into low-speed high torque output, providing smooth walking driving force or high-frequency vibration excitation force for the roller, and is a key link to ensure the power transmission efficiency of equipment compaction operation.

Structure and Material

Material process: High strength alloy steel (such as 20CrMnTi or 42CrMo) is selected for forging, and the tooth surface is processed by precision rolling/hobbing, followed by deep carburizing quenching or high-frequency induction quenching treatment. High tooth surface hardness (HRC58-62), good core toughness, and strong resistance to wear, pitting corrosion, and impact fatigue.

Structural design: The inner hole is equipped with precision keyways or splines, which tightly fit with the output shaft/eccentric shaft; The tooth profile is precision machined, with smooth meshing, low noise, optimized load distribution, and extended service life of the gear pair.

Working conditions and application scenarios

As a load-bearing transmission component of a micro roller (with a total weight of 800kg and a vibration frequency of 55Hz), this large gear needs to continuously operate under high-frequency vibration and alternating loads in narrow spaces:

Municipal road maintenance: During the repair of sidewalks and manhole covers, frequent start stop and directional changes occur, and gears are subjected to alternating impacts.

Backfilling and compaction of trenches: In narrow alleys of underground pipeline networks, equipment is often used for semi clutch high load climbing, requiring high torque bearing capacity.

Landscape/community construction: The asphalt surface layer of parks and parking lots is compacted and subjected to long-term continuous vibration and high-temperature operation, requiring high fatigue strength.

Replacement and maintenance suggestions

If there is weak driving/vibration of the equipment, abnormal noise from the gearbox ("buzzing" or "clacking" sound), and intermittent shaking of the power, it is mostly caused by severe wear, pitting or tooth breakage of the gear teeth.

When replacing, it is recommended to pair it with the small gear (231200114) to avoid uneven wear of the new and old tooth surfaces and accelerate the damage of the new part. High quality gear oil and oil seals should be replaced simultaneously to ensure good lubrication.