Unlock instant, AI-driven research and patent intelligence for your innovation.

construction machinery

A technology of construction machinery and working arms, which is applied to mechanical equipment, earth movers/excavators, servo motors, etc., can solve the problems of low fuel efficiency due to load fluctuations, and achieve the effect of avoiding large load fluctuations

Active Publication Date: 2021-12-21
XCMG EXCAVATOR MACHINERY
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • construction machinery
  • construction machinery

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a construction machine, which comprises: a working arm; a hydraulic cylinder including a rodless chamber, a rod chamber and a piston rod connected to the working arm; The first working port and the second working port communicated with the rod cavity; the first hydraulic pump is selectively communicated with the inlet of the reversing valve; the hydraulic motor is selectively communicated with the first hydraulic pump; The second hydraulic pump is connected to the hydraulic motor and is connected to the inlet of the reversing valve in an on-off manner. The output pressure of the second hydraulic pump is different from that of the first hydraulic pump; the first accumulator is connected to the first hydraulic pump. The hydraulic pump, the inlet of the reversing valve and the outlet of the reversing valve are selectively connected to each other; and the second accumulator is respectively connected to the second hydraulic pump and the inlet of the reversing valve.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F15B1/02F15B13/02F15B11/08E02F9/22
CPCF15B1/021F15B1/024F15B13/02F15B13/027F15B11/08E02F9/2217E02F9/2292E02F9/2267F15B2211/20576F15B2211/31535
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