Compound action hydraulic control system and wheeled construction machinery applying same

A technology of hydraulic control system and compound action, applied in mechanical equipment, fluid pressure actuating device, lifting device, etc., can solve the problem of unable to guarantee the priority execution of vehicle walking and steering action, affecting the handling performance and driving safety performance of the whole machine, etc. To achieve the effect of flexible steering action, ensuring safety and reliability, and ensuring movement speed

Active Publication Date: 2012-03-14
XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Obviously, for the combined action of steering action and boarding operation, the steering action of the existing hydraulic control system is limited by the boarding a

Method used

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  • Compound action hydraulic control system and wheeled construction machinery applying same
  • Compound action hydraulic control system and wheeled construction machinery applying same
  • Compound action hydraulic control system and wheeled construction machinery applying same

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Embodiment Construction

[0034] The core of the present invention is to provide a compound action hydraulic control system applied to wheeled construction machinery. The application of this control system can ensure that the steering operation is performed preferentially in the compound action control of chassis steering and boarding operations, and can effectively improve driving safety performance. . The present embodiment will be described in detail below in conjunction with the accompanying drawings.

[0035] Without loss of generality, this implementation mode takes the aerial work platform as the main body to describe in detail.

[0036] See figure 2 , which is a schematic diagram of the overall structure of the aerial work platform described in this embodiment.

[0037]Same as the prior art, the aerial work platform is used to transport personnel, tools and materials to designated locations for working equipment, including a working platform 21, an extension structure 22 and a chassis 23, an...

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Abstract

The invention discloses a compound action hydraulic control system. A liquid inlet pipeline of each operation loop is connected in parallel with a system pressure oil circuit. A hydraulic-control direction control valve is arranged between the system pressure oil circuit and a plurality of get-on operation circuits. A valve body of the hydraulic-control direction control valve is provided with four oil ports, wherein a first oil port is communicated with a second oil port; the first oil port is communicated with the system pressure oil circuit; the second oil port is communicated with the liquid inlet pipeline of a steering operation circuit; a third oil port is communicated with the liquid inlet pipelines of a plurality of get-on operation circuits; a fourth oil port is communicated witha working port of an executive component of the steering operation circuit; under the action of pressure oil of the fourth oil port, a valve core of the hydraulic-control direction control valve has the trend of displacement from a first working position to a second working position; when the valve core is positioned at the first working position, the first oil port is communicated with the thirdoil port; and the valve core is positioned at the second working position, the first oil port is not communicated with the third oil port. The invention also provides a wheeled construction machineryapplying the compound action hydraulic control system.

Description

technical field [0001] The invention relates to a wheeled construction machine, in particular to a composite action hydraulic control system and a wheeled construction machine using the system. Background technique [0002] In the prior art, various types of wheeled construction machinery have good self-propelled performance, and thus are widely used in different working environments. [0003] Each type of wheeled construction machinery completes corresponding functions through the actions of different executive components, such as: wheeled cranes, wheeled excavators, wheeled aerial work platforms, etc. As we all know, with the acceleration of the pace of social development, the requirements for various construction machinery are not limited to basic working performance such as safety and reliability. How to improve working efficiency has become the key point of optimal design; improve its operability. [0004] Taking the aerial work platform as an example, it has two type...

Claims

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Application Information

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IPC IPC(8): B60R16/08B66F11/04F15B11/20
Inventor 孔德美韩记生
Owner XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
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