Xcmg Excavator Machinery Co., Ltd

Mingjun Liao

Zong Li

Jiasheng Qin

Hong Zhang

Yufeng Yang

Shengxia Zhang

Yong Wang

Kai Liu

Jian Zhang

Disclosed is an apparatus for improving excavating operation characteristic and grading operation characteristic of an excavator. The apparatus includes a solenoid valve group and a hydraulically controlled selector valve. An oil controlling output Aof the solenoid valve group is configured in series with oil controlling input aof the hydraulic control valve. An oil controlling output Aof the solenoid valve group is configured in series with a pilot control end XBaof a multi-port valve group. An oil return port Tof the solenoid valve group is connected to the hydraulic oil tank. An oil controlling output bof the hydraulically controlled selector valve is connected to a pilot control end XAbof the multiplexer valve group, and an oil return port Tof the hydraulically controlled selector valve is connected with the hydraulic oil tank. The apparatus improves operational efficiency and control comfortability.

Apparatus for improving excavating operation characteristic and grading operation characteristic of excavator

A method for improving excavating operation characteristic and grading operation characteristic of an excavator is disclosed. A hydraulically controlled selector valve is added in a boom confluence control circuit of a hydraulic excavator, and a solenoid valve group is added in the boom confluence control circuit and the bucket/stick confluence control circuit. A controller sends a control signal to switch the solenoid valve group between a disconnected mode and a connected mode. The controller may send out a signal to disconnect the solenoid valve group, to restore a valve spool to a middle position, to restore a boom lifting confluence circuit, and to disconnect a bucket/stick swinging confluence circuit to perform a standard excavation mode. The controller may send out a signal to connect the solenoid valve group to disconnect a boom lifting confluence circuit and to increase a bucket/stick swinging confluence circuit to achieve a grading operation mode.

Method for improving excavating operation characteristic and grading operation characteristic of excavator

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Xuzhou, China

Mingjun Liao