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Land leveller front wheel drive hydraulic system

A hydraulic system, front wheel drive technology, applied in mechanically driven excavators/dredgers, earth movers/shovels, construction, etc., can solve problems such as deviation, and achieve the effect of simple control

Inactive Publication Date: 2020-01-31
GUANGXI LIUGONG MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a front-wheel drive hydraulic system of a grader to solve the problem that the existing double-closed hydraulic system of the front-wheel drive of the grader deviates when the open-loop control is used, so that the integration of one system can realize Coexistence of the open system and the closed system makes the system control easy and at the same time can give full play to the role of the front wheel assist

Method used

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  • Land leveller front wheel drive hydraulic system
  • Land leveller front wheel drive hydraulic system
  • Land leveller front wheel drive hydraulic system

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Embodiment Construction

[0022] The specific implementation will be described below in conjunction with the accompanying drawings.

[0023] like image 3 As shown, the ground machine front wheel drive hydraulic system in this embodiment mainly includes a front drive pump 1, a right front wheel motor 6, and a left front wheel motor 7, and the front drive pump includes a left travel pump 101, a right travel pump 102, and an oil charge pump 103. The first combination valve 5, the second combination valve 4, the speed switching valve 3, the filter 2, the hydraulic oil tank, etc.

[0024] like figure 1 As shown, the first combination valve 5 has A2 oil port and B2 oil port connected with the working oil port of the left front wheel motor 7, C2 oil port and D2 oil port connected with the working oil port of the right front wheel motor 6; It includes a first on-off valve 501 and a second on-off valve 502, both of which are solenoid valves, and their electric control terminals are connected to the controlle...

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Abstract

The invention relates to a land leveller front wheel drive hydraulic system. The land leveller front wheel drive hydraulic system is used for solving the problem that an existing land leveller front wheel drive double closed type hydraulic system is deviated during use of open loop control. The land leveller front wheel drive hydraulic system comprises a precursor pump, a left front wheel motor, aright front wheel motor, a controller, a first combined valve and rotating speed sensors for detecting the rotating speed of front wheels, rear wheels and the precursor pump; the two ends of a firstswitching valve and the two ends of a second switching valve in the first combined valve are cross connected between the right front wheel motor and the left front wheel motor correspondingly; the controller controls the displacement of a left travelling pump and a right travelling pump according to the left front wheel rotating speed, the right front wheel rotating speed and the rear wheel rotating speed; or the controller controls the displacement of the left travelling pump and the right travelling pump according to the precursor pump rotating speed and the rear wheel rotating speed. The land leveller front wheel drive hydraulic system combines the advantages of the front wheel drive open hydraulic system and the closed hydraulic system, so that the control of the front wheel drive becomes simpler, and the boosting effect of the front wheels can be fully played.

Description

technical field [0001] The invention relates to a front-wheel drive of a grader, and more specifically relates to a front-wheel drive hydraulic system of a grader. Background technique [0002] The existing motor grader front wheel drive hydraulic system has an open hydraulic system with a drive pump and two hydraulic system motors. The drive pump absorbs oil from the hydraulic oil tank, and the outlet pressure oil is connected to the two parallel motors through the control valve, and then through the control valve. An open hydraulic system that returns to the hydraulic oil tank; a closed hydraulic system with a driving pump and two pressure system motors, the pressure oil at the outlet of the driving pump passes through two parallel motors, and then returns to a closed hydraulic system that drives the pump There is also a closed hydraulic system with two driving pumps and two hydraulic motors. The pressure oil at the outlet of the driving pump passes through the motors resp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/84
CPCE02F3/84E02F3/842
Inventor 刘光喜白健信李良周黎培杰李大尤
Owner GUANGXI LIUGONG MASCH CO LTD
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