Hydraulic excavator capable of adjusting composite movement compatibility

Abstract

The invention discloses a hydraulic excavator capable of adjusting composite movement compatibility. The hydraulic excavator is characterized in that a first pilot oil circuit is used as a two-position three-way valve switch to control pilot, so that a second pilot oil circuit partially returns to an oil tank while the generated maximal pressure is reduced; a shift motion of a valve core of a controlled master control valve is shortened; the flow of the valve core of the master control valve is reduced; the speed of a corresponding actuating element, such as an oil cylinder, is slowed down, and an effect that an actuating element of the first pilot control is prior to an actuating element of the second pilot control is generated. A combined logic priority valve is added to the hydraulic excavator; when the master control valve is not provided with the logic priority valve and the compatibility of the two actuating elements needs to be adjusted, an external combined logic priority valve module can be adopted to improve the pilot oil circuit of the master control valve; the hydraulic excavator is convenient to debug and improve, and short in period; the combined logic priority valve is installed, and different specifications of orifice discs are matched to adjust the comfort of the loading operation.

Description

technical field [0001] The invention relates to a hydraulic excavator capable of adjusting the coordination of compound actions, which belongs to the technical field of machinery. Background technique [0002] Due to the lack of basic research on the main control valve and the corresponding flow rate of the spool opening area, domestic excavator factories usually use imported hydraulic components in the hydraulic system of domestic excavators, especially the main control valve. More than half of the domestic excavator The factories all use hydraulic main control valves from a well-known Japanese manufacturer. Because imported hydraulic components are used, domestic excavator factories have the problem of long debugging and improvement process cycles. At the same time, the operating comfort of the excavator will indirectly affect the operating efficiency. The improvement of the coordination of compound actions of excavators usually requires the help of hydraulic system suppli...

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Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a hydraulic excavator that can adjust the coordination of compound actions. On the one hand, it can adjust the comfort of operation, and on the other hand, it can effectively solve the long period of debugging and improvement process of domestic excavator factories. The problem

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