Land leveller traveling hydraulic driving system with parallel connection of double pumps and double motors

A drive system and motor grader technology, which is applied to earth movers/excavators, construction, etc., can solve the problems of difficult realization and lack of natural differential speed, and achieve the effect of convenient operation, simple structure and easy realization

A drive system and motor grader technology, which is applied to earth movers/excavators, construction, etc., can solve the problems of difficult realization and lack of natural differential speed, and achieve the effect of convenient operation, simple structure and easy realization

CN105971052AActive Publication Date: 2016-09-28GAOYUAN HIGHWAY MAINTENANCE TECH HENAN PROV
6 Cites 11 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Land leveller traveling hydraulic driving system with parallel connection of double pumps and double motors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention is described in further detail below in conjunction with accompanying drawing:

[0027] refer to figure 1 , the motor grader driving hydraulic drive system with two pumps and two motors in parallel according to the present invention includes a transfer case 1, a fuel tank, two single-pump and single-motor closed hydraulic circuits, a first two-position two-way solenoid valve 111 and a second two-way solenoid valve 111. Two-position two-way solenoid valve 112; two single-pump single-motor closed-type hydraulic circuits include travel pump 2, pump swash plate control hydraulic cylinder 3, first electric proportional valve 41, second electric proportional valve 42, first safety overflow Valve 61, second safety relief valve 62, relief valve 63, charge relief valve 64, shuttle valve 7, charge pump 13, flushing valve 9, motor variable control hydraulic cylinder 12 and travel variable motor 8; transfer case The output shaft of 1 is connected with the dri...

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 discloses a land leveller traveling hydraulic driving system with parallel connection of double pumps and double motors. The system comprises a transfer case, an oil tank, two single-pump single-motor closed hydraulic loops and a first two-position two-way solenoid valve as well as a second two-position two-way solenoid valve; the two single-pump single-motor closed hydraulic loops respectively comprise a traveling pump, a pump tilting tray control hydraulic cylinder, a first electric proportional valve, a second electric proportional valve, a first safety overflow valve, a second safety overflow valve, an overflow valve, an oil supplementing overflow valve, a shuttle valve, an oil supplementing pump, a flush valve, a motor variable control hydraulic cylinder and a traveling variable motor. The system is simple in structure and can realize stepless speed change, free veering and synchronous control.

Description

technical field [0001] The invention belongs to the technical field of transmission and control of construction machinery, and relates to a driving hydraulic drive system of a grader with two pumps and two motors connected in parallel. Background technique [0002] A grader is a construction machine that uses a blade as the main working device and is equipped with other replaceable auxiliary working devices to complete land leveling and shaping. [0003] At present, the drive system of motor grader mainly has three forms: mechanical transmission, hydraulic transmission and hydrostatic transmission. Among them, the mechanical grader adopts the direct transmission of the gearbox, which has high transmission efficiency, but the structure is complex, the gearbox is difficult to manufacture and the manufacturing cost is high, and it is not easy to realize automatic transmission, let alone continuously variable transmission; the hydraulic grader has a strong Excellent load self-a...

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
28 Sep 2016
Publication
CN105971052A
IPC
E02F9/22
CPC
E02F9/225; E02F9/2253; E02F9/2292
Inventors
王欣; 张志友