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Land leveller and shovel blade lifting control system thereof

A lifting control and blade technology, which is applied to earth movers/excavators, construction, etc., can solve the problems of low operating efficiency, cumbersome handle control, and the inability to realize the overall lifting or lowering of the blade, so as to improve operating efficiency, The control method is flexible and the effect of ensuring reliability

Active Publication Date: 2013-04-17
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of the existing handle operating system is: the handle control is cumbersome, the overall lifting or lowering of the blade cannot be realized, and the operating efficiency is low

Method used

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  • Land leveller and shovel blade lifting control system thereof
  • Land leveller and shovel blade lifting control system thereof
  • Land leveller and shovel blade lifting control system thereof

Examples

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Embodiment Construction

[0035] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. Below in conjunction with accompanying drawing, each preferred embodiment of the present invention is further described:

[0036] figure 1 A schematic diagram of the blade lifting system provided by the first embodiment of the present invention is shown. The blade lift control system provided in this embodiment includes: a hydraulic pump 9, a first reversing valve group 11, a second reversing valve group 10, a left oil cylinder 7 and a right oil cylinder 8; wherein,

[0037] The first reversing valve group 11 includes: an oil inlet P, an oil return port T, a first working oil port A1, a second working oil port A2, a third working oil port B1 and a fourth working oil port B2;

[0038]The oil inlet P and the oil return port T are respectively communicated with the oil pressure port of the hydraulic pump ...

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PUM

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Abstract

The invention discloses a land leveller and a shovel blade lifting control system thereof. The shovel blade lifting control system comprises a hydraulic pump, a first reversing valve group, a second reversing valve group, a left oil cylinder and a right oil cylinder, and a first operating oil port of the first reversing valve group is selectively communicated with a cavity with a rod of the left oil cylinder through the second reversing valve group or simultaneously communicated with cavities with rods of the left oil cylinder and the right oil cylinder. A second operating oil port is correspondingly communicated with a rodless cavity of the left oil cylinder through the second reversing valve group or simultaneously communicated with rodless cavities of the left oil cylinder and the right oil cylinder. A third operating oil port is selectively communicated with the cavity with the rod of the right oil cylinder through a second reversing valve group or simultaneously communicated with the cavities with the rods of the right oil cylinder and the left oil cylinder. A fourth operating oil port is correspondingly communicated with the rodless cavity of the right oil cylinder through the second reversing valve group or simultaneously communicated with the rodless cavities of the right oil cylinder and the left oil cylinder. The shovel blade lifting control system is capable of realizing simultaneous and independent movement of the left and right oil cylinders and has the advantages of high operating efficiency and flexibility in control mode.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a motor grader and a blade lift control system thereof. Background technique [0002] The grader is a kind of earth and stone machinery, and its main function is to use the blade to carry out large-scale ground leveling operations. At present, motor graders are widely used in the construction of roadbeds and pavements, construction of side slopes, and excavation of side ditches. [0003] The blade is the key working device of the grader. It is set between the front and rear axles of the machine and can perform actions such as lifting and lowering. The lifting of the blade is mainly realized by the expansion and contraction of the left and right oil cylinders. Specifically: the left and right oil cylinders act on the ball studs on the left and right sides of the draw frame, respectively. , so as to adjust the height of the left and right ends of the blade body, so that the ...

Claims

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Application Information

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IPC IPC(8): E02F3/85
Inventor 张德兴李杜李军华
Owner SANY HEAVY IND CO LTD (CN)
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