Supporting leg extension control method, controller and control system, and crane

A telescoping control and controller technology, which is applied in the field of control systems, cranes, outrigger telescopic control methods, and controllers, can solve problems that affect hoisting performance, hold pressure, and unfavorable vehicle safety control, so as to prevent outriggers from holding pressure , Eliminate holding pressure, and prevent inaccurate detection of outrigger force

Active Publication Date: 2014-01-22
SANY AUTOMOBILE HOISTING MACHINERY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the outriggers of the crane are stretched to the maximum value, since the hydraulic oil in the rod chamber is completely excluded, the pressure in the rodless chamber is equal to the driving pressure, which will cause pressure suffocation
At this time, the gravity calculated by the pressure sensors of the upper and lower chambers is far less than the actual load bearing of the outriggers, which is not conducive to the safety control of the whole vehicle, and thus affects the hoisting performance

Method used

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  • Supporting leg extension control method, controller and control system, and crane
  • Supporting leg extension control method, controller and control system, and crane
  • Supporting leg extension control method, controller and control system, and crane

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] refer to figure 1 , figure 1 It is a flow chart of the steps of an embodiment of the outrigger telescopic control method of the present invention, the method includes the following steps:

[0032] Step S01: According to the pressure information detected by the outrigger pressure detection unit in the upper and lower chambers, determine the gravity on the outrigger;

[0033] Step S02: Calculate the rate of change of the gravity on the outrigger;

[0034] Step S03: Judging whether the rate of change of the gravity of the outrigger when it is extended exceeds a preset first threshold, and determining that the outrigger has been fully extended; if yes, execute step S04; if not, execute step...

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Abstract

The invention discloses a supporting leg extension control method, a supporting leg extension controller and a supporting leg extension control system, and a crane. The supporting leg extension control method comprises the following steps: according to pressure information detected by a unit for detecting pressures of an upper chamber and a lower chamber of a supporting leg, determining the gravity borne by the supporting leg; calculating the change rate of the gravity borne by the supporting leg, and the change rate of the gravity borne when the supporting leg extends out surpasses a first threshold, determining that the supporting leg extends out completely; and controlling the supporting leg to automatically retract for a given distance, and locking the extending action of the supporting leg. Through the supporting leg extension control method, the supporting leg extension controller and the supporting leg extension control system, a pressureout problem of the supporting leg can be prevented, detected or eliminated, thus avoiding inaccurate detection of a supporting leg strength caused by pressureout and facilitating safe control of a whole vehicle.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a method for controlling the expansion and contraction of outriggers, a controller, a control system and a crane. Background technique [0002] Generally speaking, two different pressure sensors are set in the upper cavity and the lower cavity of the outrigger of the crane, and the pressure on the outrigger is determined through the values ​​collected by the two pressure sensors. However, when the outriggers of the crane are extended to the maximum value, since the hydraulic oil in the rod chamber is completely excluded, the pressure in the rodless chamber is equal to the driving pressure, which will cause pressure suppression. At this time, the gravity calculated by the pressure sensors of the upper and lower chambers is far less than the actual load-bearing of the outriggers, which is not conducive to the safety control of the whole vehicle, and then affects the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/78B66C13/18
Inventor 郝子新胡晓中黄大鹏
Owner SANY AUTOMOBILE HOISTING MACHINERY
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