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当前挖掘机的国际发展趋势是改用液压传动系统代替正在使用的机械传动系统。因液压传动系统在高压变量、速度传感系统、铲斗水平推力的增大和良好的定位控制等方面都是优越的。自然,它同机械传动系统的挖掘机相比,虽不能达到较少的停车时间,但它借助于可供使用的不同附加装置,增加运动能力,从而具有很大的生产潜力。例如,底卸式铲斗比前卸式铲斗挖掘机,作业更快些,循环周期更
The current international trend of excavators is to use instead of hydraulic transmission system is being used mechanical transmission system. Due to hydraulic transmission system in the high-pressure variable speed sensing system, the bucket horizontal thrust increases and good positioning control and so on are superior. Naturally, it does not achieve less downtime than a mechanical drivetrain excavator, but it has great productivity potential with the aid of different attachments that can be used to increase the exercise capacity. For example, bottom-dump buckets work faster and have more cycles than front-dump bucket excavators