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挖掘装载机工作装置的“自动调平”是指装载机工作时,随着动臂的举升,可通过铲斗液压缸自动调整铲斗与动臂之间的夹角,防止在动臂举升过程中,铲斗向后倾撒物料,引发事故。论述托架连杆机构装载工作装置自动调平功能的实现方法,即动臂举升到一定位置时停止运动,铲斗正好处于临界撒料状态,然后调整铲斗与动臂之间的夹角,使铲斗前倾,再举升动臂,如此反复进行,直至铲斗达到卸料位置。介绍了实现铲斗自动调平功能的液压系统原理,以及为实现此功能而研制的用于控制铲斗液压缸的反馈机构。对有无调平功能的动臂举升时间进行对比,结果表明:实现自动调平后,动臂举升时间略有增加,但仍处于国家标准规定的7s以内。研制的自动调平机构已在厦工集团生产的XG765型挖掘装载机上应用,用户反映良好。
Backhoe loader work device “automatic leveling” refers to the loader work, with the boom lift, bucket cylinder hydraulic cylinder can automatically adjust the angle between the bucket and boom to prevent the boom lift During the ascent, the bucket dumped the material backward, causing an accident. This paper discusses how to realize the auto-leveling function of the loading mechanism of the link mechanism of the carriage, that is, when the boom is lifted to a certain position, the bucket is stopped and the bucket is in the critical state of scattering material. Then the angle between the bucket and the boom is adjusted , So that the bucket forward, then lift the boom, so repeatedly until the bucket reached the discharge position. The principle of the hydraulic system to realize the automatic bucket leveling function and the feedback mechanism for controlling the hydraulic cylinder of the bucket were developed to realize this function. The comparison of boom lift time with or without leveling function shows that the lift time of boom is slightly increased after automatic leveling is achieved, but it is still within 7s of the national standard. The developed automatic leveling mechanism has been applied to the XG765 excavator manufactured by Xiamen Engineering Group Co., Ltd., and the users have shown a good response.