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Construction machine

A technology for construction machinery and working arms, which is applied in mechanical equipment, earthmoving machines/shovels, fluid pressure actuating devices, etc., can solve problems such as low fuel efficiency due to load fluctuations, and achieve the effect of avoiding large load fluctuations

Active Publication Date: 2021-11-02
XCMG EXCAVATOR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to provide a construction machine to improve the problem of low fuel efficiency caused by large load fluctuations of the engine driving the hydraulic pump in the hydraulic system in the related art

Method used

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] Such as figure 2 As shown, the engineering machinery of this embodiment includes a working arm, a hydraulic cylinder 11, a reversing valve 10, a first hydraulic pump 4, a hydraulic motor 21, a second hydraulic pump 2, a first accumulator 13 and a second accumulator 14.

[0028] The hydrauli...

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Abstract

The present invention relates to a construction machine comprising a working arm, a hydraulic cylinder, a reversing valve, a first hydraulic pump, a hydraulic motor, a second hydraulic pump, a first energy accumulator and a second energy accumulator; the hydraulic cylinder comprises a rodless cavity, a rod cavity and a piston rod connected with the working arm; the reversing valve comprises an inlet, an outlet, a first working port communicated with the rodless cavity and a second working port communicated with the rod cavity; the first hydraulic pump is selectively communicated with the inlet of the reversing valve in an on-off manner; the hydraulic motor is selectively communicated with the first hydraulic pump in an on-off manner; the second hydraulic pump is in transmission connection with the hydraulic motor and selectively communicates with the inlet of the reversing valve in an on-off manner, and the output pressure of the second hydraulic pump is different from that of the first hydraulic pump; the first energy accumulator is selectively communicated with the first hydraulic pump, the inlet of the reversing valve and the outlet of the reversing valve in an on-off manner; and the second energy accumulator is selectively communicated with the second hydraulic pump and the inlet of the reversing valve in an on-off manner.

Description

technical field [0001] The invention relates to the field of engineering equipment, in particular to an engineering machine. Background technique [0002] figure 1 A structural schematic diagram of a hydraulic system of an excavator of a related art is shown, as figure 1 As shown, the hydraulic system of the excavator includes a hydraulic cylinder 6 for driving the pitch and swing of the working arm, a reversing valve 4 for controlling the movement of the hydraulic cylinder 6, a hydraulic pump 3 for supplying hydraulic fluid to the hydraulic cylinder 6, and a hydraulic cylinder for accommodating the hydraulic pressure. Hydraulic fluid tank 11 for fluid. [0003] Wherein, the reversing valve 4 includes an inlet communicated with the hydraulic pump 3, an outlet communicated with the hydraulic fluid tank 11, a first working port communicated with the rod chamber of the hydraulic cylinder 6, and a second port communicated with the rodless chamber of the hydraulic cylinder 6. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/02F15B13/02F15B11/08E02F9/22
Inventor 耿家文金月峰宋之克张箭董玉忠苗衡卢杰程易张新奎
Owner XCMG EXCAVATOR MACHINERY