The function of the roller is to transfer the weight of the locomotive group to the ground and roll it on the track. To prevent derailment, the roller should also be able to prevent the track from moving laterally relative to it. Rollers often work in mud and sand, and withstand strong impacts, the working conditions are extremely harsh, and the rim is easy to wear. The requirements for the roller are: the rim is wear-resistant, the bearing seal is reliable, and the rolling resistance is small.
Drive teeth the excavator drive gear is an important part of the excavator and is used to propel the excavator forward. However, the transmission part of the excavator, that is, the drive tooth of the excavator, is easily damaged. Play the role of driving track, fix on the travel motor, and transmit the driving force of the travel motor to the track through gear structure. Usually there is 1 of each travel motor
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