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Hydraulic driving device of excavator

A driving device and excavator technology, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems of weak digging, high fuel consumption, high pressure loss, etc., to increase digging force, reduce fuel consumption, improve The effect of work efficiency

Active Publication Date: 2011-12-28
XCMG EXCAVATOR MACHINERY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic drive device currently used for medium-sized hydraulic excavators has the following defects: when the hydraulic excavator is excavating or under heavy load conditions, when the oil in the rod cavity of the stick cylinder flows through the directional valve, the pressure loss is too high, which reduces the The output force when the piston rod of the stick cylinder is stretched out causes the hydraulic excavator's stick to dig weakly, which greatly reduces the operating efficiency of the hydraulic excavator, and the fuel consumption is relatively high

Method used

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing.

[0011] Such as figure 1 Shown: the present invention includes a control valve 1, a first directional valve 21, a second directional valve 22, a stick cylinder 3, a hydraulic control check valve 4, a fuel tank and a first check valve 5; an oil port of the control valve 1 Connect the oil tank, the two oil ports are connected to the pilot oil port of the first directional valve 21, the two working oil ports of the first directional valve 21 are respectively connected to the rodless cavity 31 and the rod cavity 32 of the arm cylinder 3, the second direction The valve 22, the hydraulically controlled one-way valve 4 and the first one-way valve 5 are arranged in the internal oil passage; it also includes a third directional valve 23, a first pipeline 61, a second pipeline 62, a third pipeline 63, a fourth pipeline 64, The first joint 71, the second joint 72 and the spring 8; one...

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Abstract

The invention discloses a hydraulic driving device of an excavator, belonging to the technical field of hydraulic circuit devices. The hydraulic driving device comprises a control valve, a first direction valve, a second direction valve, a bucket arm cylinder, a hydraulic control one-way valve, an oil tank and a first one-way valve, and also comprises a third direction valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first joint, a second joint and a spring, wherein one end of the first pipeline is connected with the first joint, the other end of the first pipeline is connected with a pilot control port of the third direction valve, one end of the fourth pipeline is connected with the second joint, the other end of the fourth pipeline is connected with a working oil inlet of the third direction valve, one end of the second pipeline is connected with a working oil outlet of the third direction valve, the other end of the second pipeline is connected with the oil tank, one end of the third pipeline is connected with an oil drainage port of a spring cavity of the third direction valve, and the other end of the third pipeline is connected with the oiltank. The invention has the beneficial effect of improving the excavation capacity of a bucket arm of the hydraulic excavator, thereby improving the operation efficiency of the hydraulic excavator and reducing oil consumption.

Description

technical field [0001] The invention relates to an excavator hydraulic driving device, which belongs to the technical field of hydraulic circuit devices. Background technique [0002] At present, the hydraulic systems of medium and large excavators are devoted to the technical research of high efficiency and energy saving. The hydraulic drive device currently used for medium-sized hydraulic excavators has the following defects: when the hydraulic excavator is excavating or under heavy load conditions, when the oil in the rod cavity of the stick cylinder flows through the directional valve, the pressure loss is too high, which reduces the The output force when the piston rod of the stick cylinder is stretched out causes the hydraulic excavator's stick to dig weakly, which greatly reduces the operating efficiency of the hydraulic excavator, and the fuel consumption is also relatively high. Contents of the invention [0003] In view of the above-mentioned problems in the pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22
Inventor 费树辉李宗张宏秦家升贺艳飞史继江胡恒强张箭石立京王渠刘合涛邹鹏
Owner XCMG EXCAVATOR MACHINERY
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