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A kind of crane free fall hook hydraulic system and crane

A hydraulic system and crane technology, which is applied in the crane free-falling hook hydraulic system and the field of cranes, can solve the problems of power priority and low efficiency, and achieve the effect of meeting the needs of multiple working conditions and improving work efficiency and reliability

Active Publication Date: 2019-06-07
ZHEJIANG SANY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a crane free-falling hook hydraulic system and a crane to improve the problem that the existing hydraulic control system and the crane cannot directly achieve power priority and low efficiency

Method used

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  • A kind of crane free fall hook hydraulic system and crane
  • A kind of crane free fall hook hydraulic system and crane
  • A kind of crane free fall hook hydraulic system and crane

Examples

Experimental program
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Effect test

Embodiment 1

[0078] Embodiment 1, with reference to Figure 4 as shown,

[0079] A crane free fall hook hydraulic system, comprising a pedal pilot valve 1, a pressure reducing valve 2, a first two-position four-way solenoid valve 3, a first two-position four-way hydraulic control reversing valve 4, a handle pilot valve 5, or Gate type shuttle valve 6, double reversing valve group 7, disc brake 8, reducer clutch 9, winch 10, relief valve 11 and servo pump 12.

[0080] Wherein, the two-way reversing valve group 7 includes a second two-position four-way solenoid valve 7a and a second two-position four-way hydraulic control reversing valve 7b.

[0081] The oil outlet of the servo pump 1212 is connected with the oil inlet of the overflow valve 11 , the pressure reducing valve 2 and the first two-position four-way solenoid valve 3 .

[0082] The working oil port A of the pressure reducing valve 2 is connected with the pressure oil port P of the pedal pilot valve 1, the handle pilot valve 5 and...

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Abstract

The present invention provides a crane free-falling hook hydraulic system and a crane including the hydraulic system, wherein the hydraulic system includes: a hydraulic oil delivery pump, a first working oil circuit unit used to control the clutch of the reducer, and a first working oil circuit unit used to control the brake of the reducer The second working oil circuit unit, the third working oil circuit unit used to control the hydraulic motor to perform lifting action. The third working oil circuit unit controls the hydraulic motor to perform the lifting action, and at the same time outputs a pilot control signal to intervene in the control of the first working oil circuit unit and the second working oil circuit unit, which can quickly switch in the free-fall hook mode to realize the hoisting up And down, without a series of cumbersome operations such as switching working modes. The hydraulic system and crane have fundamentally changed the previous control method, effectively improving work efficiency and reliability, and meeting the multi-working-condition requirements of multi-functional vehicles.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane free-falling hook hydraulic system and a crane. Background technique [0002] At present, the free-fall hook hydraulic system is more and more widely used in construction machinery lifting equipment, which can greatly shorten the hook lowering time and improve work efficiency. However, the existing hydraulic control system and cranes cannot directly achieve power priority, and the control system needs to be switched each time, resulting in reduced efficiency and reduced reliability. Contents of the invention [0003] One of the objectives of the present invention is to provide a free-falling hook hydraulic system of a crane and a crane, so as to improve the problem that the existing hydraulic control system and the crane cannot directly achieve power priority and low efficiency. [0004] In order to solve at least one of the above technical problems, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/20B66C13/16F15B21/08
CPCB66C13/16B66C13/20F15B21/087
Inventor 许月平林异捷许学建
Owner ZHEJIANG SANY EQUIP
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