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Lazy arm telescopic mechanism and hydraulic control system, hydraulic control method and crane thereof

A hydraulic control system and control system technology, applied in cranes, mechanical equipment, fluid pressure actuating devices, etc., can solve problems such as waste of hydraulic oil power

Active Publication Date: 2013-11-13
ZOOMLION HEAVY IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a boom telescopic mechanism, its hydraulic control system and control method, and a crane to solve the problem of large waste of hydraulic oil power in the hydraulic control system of the boom telescopic mechanism in the prior art

Method used

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  • Lazy arm telescopic mechanism and hydraulic control system, hydraulic control method and crane thereof
  • Lazy arm telescopic mechanism and hydraulic control system, hydraulic control method and crane thereof

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Embodiment Construction

[0029] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0030] Such as figure 1 As shown, according to the embodiment of the present invention, the hydraulic control system of the boom telescopic mechanism includes a first hydraulic pump 10 , a second hydraulic pump 20 , a telescopic cylinder control system 30 , an arm pin control system 40 and a first connecting oil circuit 50 . The first hydraulic pump 10 is connected to the oil inlet P of the telescopic cylinder control system 30 for providing hydraulic oil to the telescopic cylinder control system 30 . The second hydraulic pump 20 is connected to the oil inlet P of the arm pin control system 40 for providing hydraulic oil to the arm pin control system 40 . The first connecting oil circuit 50 is conn...

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Abstract

The invention provides a lazy arm telescopic mechanism and a hydraulic control system, a hydraulic control method and a crane thereof. The hydraulic control system of the lazy arm telescopic system comprises a first hydraulic pump (10), a second hydraulic pump (20), a telescopic oil cylinder control system (30) of which the oil inlet is connected to the first hydraulic pump (10), an arm pin control system (40) of which the oil inlet is connected to the second hydraulic pump (20), and a first connection oil path (50) connected between the oil outlets of the first hydraulic pump (10) and the second hydraulic pump (20), wherein the first connection oil path (50) is provided with a control valve (51) for controlling the on / off of the first connection oil path (50) and controlling hydraulic oil output from the first hydraulic pump (10) and the second hydraulic pump (20) to be converged or shunted. According to the hydraulic control system provided by the invention, the problem of larger power waste of the hydraulic oil of the hydraulic control system of a lazy arm telescopic mechanism in the prior art is solved.

Description

technical field [0001] The invention relates to the field of telescopic arm lifting equipment, in particular to a boom telescopic mechanism, a hydraulic control system and a control method thereof, and a crane. Background technique [0002] With the continuous development of wheeled crane technology and the continuous improvement of user needs, the boom of wheeled cranes is getting longer and longer, and the number of joint arms is also increasing. [0003] At present, the expansion and contraction of each section of the arm is mainly realized in two ways, one is a multi-cylinder rope row type telescopic mechanism, and the other is a single-cylinder bolt type telescopic mechanism. Restricted by weight and space layout, when the number of boom sections is more than 5, the multi-cylinder rope row telescopic mechanism can no longer meet the demand. However, the single-cylinder bolt-type telescopic mechanism can well meet the telescopic requirements of multi-section booms. Its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B9/08B66C23/693
Inventor 李雄刘伟
Owner ZOOMLION HEAVY IND CO LTD
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