Hydraulic excavator and hydraulic device for preventing excavator from lowering down on flat ground

A technology for hydraulic excavators and hydraulic devices, which is applied in the field of hydraulic devices, can solve problems such as the sinking of the stick and affect the performance of the excavator, and achieve the effects of improving the operating performance, realizing convenience and excellent operability.

Pending Publication Date: 2016-11-16
SHANDONG CHANGLIN MACHINERY GRP
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AI Technical Summary

Problems solved by technology

[0002] In the current excavator system, when the excavator is operating on a level ground, due to the relatively large load of the boom and the relatively light load of the stick, the stick will sink at the moment of starting, that is, the stick nodding phenomenon, especially on flat and soft ground. This phenomenon is particularly obvious, which seriously affects the performance of the excavator.

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  • Hydraulic excavator and hydraulic device for preventing excavator from lowering down on flat ground
  • Hydraulic excavator and hydraulic device for preventing excavator from lowering down on flat ground

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0047] see figure 1 and figure 2 , figure 1 It is a schematic diagram of a hydraulic device according to an embodiment of the present invention, figure 2 It is a schematic diagram of a hydraulic device according to another embodiment of the present invention.

[0048] The hydraulic excavator of the present invention, in addition to including the hydraulic device for preventing the excavator from nodding flatly, the composition, structure, mutual positional relationship, connection relationship and working principle of other parts are relatively mature prior art, so here No more details, only the hydraulic device for preventing the excavator from nodding flat according to the present invention will be described in detail below.

[0049] The hydraulic device for preventing the excavator from flat nodding of the present inv...

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Abstract

A hydraulic excavator and its hydraulic device for preventing the excavator from nodding flatly, the hydraulic excavator includes a hydraulic device preventing the excavator from nodding flatly, the hydraulic device preventing the excavator from nodding flatly is installed on the hydraulic oil circuit of the hydraulic excavator, comprising : Two-position three-way reversing valve, including a valve body and a spool, the valve body is provided with a first port, a second port, a third port and ports, and the first port is respectively connected to the The arm control oil circuit of the hydraulic oil circuit and the arm pilot handle control oil circuit are connected, the third port is connected with the oil tank, and the ports are respectively connected with the boom control oil circuit of the hydraulic oil circuit and the boom pilot handle Control the communication of the oil circuit; and the piston, including a cylinder body and a piston body installed in the cylinder body, the two ends of the cylinder body are respectively provided with a first oil port and a second oil port, and the first oil port It communicates with the second port, and the second oil port communicates with the oil tank.

Description

technical field [0001] The invention relates to an excavator, in particular to a hydraulic excavator and a hydraulic device for preventing the excavator from nodding flatly. Background technique [0002] In the current excavator system, when the excavator is operating on a level ground, due to the relatively large load of the boom and the relatively light load of the arm, the arm will sink at the moment of starting, that is, the arm nods, especially on flat and soft ground. This phenomenon is especially obvious at this time, which seriously affects the performance of the excavator. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a hydraulic excavator capable of eliminating the flat nodding of the excavator and a hydraulic device for preventing the excavator from flat nodding, so as to overcome the above-mentioned defects in the prior art. [0004] In order to achieve the above object, the present invention provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22
CPCE02F9/2264
Inventor 李合永杜艳张海洋巩秀江张洪德孙艳林
Owner SHANDONG CHANGLIN MACHINERY GRP
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