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Hydraulic steering system and road roller

A technology of steering system and hydraulic steering gear, which is applied in the direction of steering mechanism, fluid steering mechanism, steering mechanism of front and rear tandem vehicles, etc., and can solve the problems of lost locking function and easy loss of parts

Inactive Publication Date: 2014-02-05
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the parts are covered outside the frame, and the easy-to-remove pin fixing structure is used, the parts of the old machine are easy to be lost and the locking function will be lost over time.

Method used

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  • Hydraulic steering system and road roller
  • Hydraulic steering system and road roller
  • Hydraulic steering system and road roller

Examples

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0038] First of all, it needs to be explained that, in the present invention Figure 2 to Figure 6 Only the hydraulic principle diagram is shown, for those skilled in the art, the same hydraulic connection principle can be realized by various different mechanical entity structures. For example, in the preferred embodiment of the present invention shown, each valve inside the dotted box is formed as an integrated composite valve to form a whole steering gear. Of course, in other embodiments, it can also be connected through pipelines to realize hydraulic pressure. function of the steering gear. At this time, the integrated composite valve consists of several po...

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PUM

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Abstract

The invention discloses a hydraulic steering system and a road roller utilizing the hydraulic steering system. The hydraulic steering system comprises a hydraulic steering gear (1) and a steering oil cylinder (2) which is connected to a working oil opening of the hydraulic steering gear (1); a switch valve (3) is arranged between a rod chamber and or a rod-free chamber of the steering oil cylinder (2) and the hydraulic steering gear (1). According to the technical scheme of the hydraulic steering system, at least one of the rod chamber and the rod-free chamber of the steering oil cylinder is communicated with the working oil opening of the hydraulic steering gear when the hydraulic steering system does not work due to the switch valve, accordingly the oil is locked inside a corresponding chamber, the steering oil cylinder is prevented from freely extending and retracting, a front frame and a rear frame of the road roller are prevented from freely rotating when the road roller is hoisted, the structure is simple, and the practicability is strong.

Description

technical field [0001] The invention relates to the field of hydraulic steering, in particular to a hydraulic steering system and a road roller using the hydraulic steering system. Background technique [0002] The hydraulic steering system is applied to various construction machinery, such as articulated road rollers, which include mutually articulated front and rear frames, and two steering cylinders are arranged on the articulated frame, so that the front and rear frames can be rotated through the expansion and contraction of the cylinders The relative rotation in the plane parallel to the road surface realizes the steering of the road roller through the formed angle. [0003] However, when the road roller is to be hoisted, it must be ensured that the front and rear frames are relatively non-moving to ensure hoisting safety. At this time, it is necessary to lock the front and rear frames, otherwise the relative movement of the front and rear frames will occur because the...

Claims

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Application Information

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IPC IPC(8): B62D5/06B62D12/00
Inventor 刘虎吴双生裴辉赵瑞刚傅盛荣
Owner ZOOMLION HEAVY IND CO LTD
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