Three hoist linkage system and construction machinery

Abstract

The invention provides a three-winch linkage system and an engineering machine. The three-winch linkage system comprises a main oil line and a pilot oil line, wherein the main oil line comprises a first winch, a second winch and a third winch, which are driven by a pumping set and are connected with one another in parallel; the pilot oil line comprises a pilot handle used for controlling a main valve and further comprises an automatic rope coiling valve block and a fourth main valve which are used for controlling the linkage of the second winch and the third winch; an opening B of a second hydraulic motor and an opening A of a third hydraulic motor are selectively communicated by the automatic rope coiling valve block, and the pumping set is actuated by the fourth main valve through the automatic rope coiling valve block to drive the second hydraulic motor and the third hydraulic motor. According to the three-winch linkage system provided by the invention, the linkage control of the three winches can be realized through the control of only one pilot handle, so that the operation is simplified, operation requirements are lowered, error operation is reduced, and the work efficiency is improved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a three-hoist linkage system and construction machinery. Background technique [0002] At present, many construction machinery and equipment have one or more hoisting mechanisms. These construction machines use winches to lift and lower heavy objects and working devices during work, or use winches to pressurize heavy objects and working devices. In some specific occasions or projects, two or more hoisting mechanisms are often required to jointly exert force on the same heavy object or working device to achieve the intended purpose. [0003] At present, the control of two or more hoisting mechanisms at the same time often requires the operation of the same number of hoisting handles, so the speed of each hoisting mechanism is not well controlled, and it is easy to cause potential safety hazards. The main disadvantages are as follows: [0004] (1) To achieve simultaneous work...

AI Technical Summary

Problems solved by technology

[0004] (1) To realize simultaneous work, several winch handles need to be operated at the same time;

[0005] (2) The hoisting speed is not well controlled, and the synchronization is not good, which may easily cause a certain hoist to be over-pulled or loose and messy;

[0006] (3) If the operator accidentally makes a mistake, it is easy to cause the winch to pull against each other, thus causing a safety accident;

[0007] (4) Operating several winches at the same time requires the operator to be highly concentrated, which may easily cause excessive tension and fatigue of the operator, resulting in a decrease in work efficiency;

[0008] (5) Waste a lot of precious time, manpower, material resources and financial resources

[0011] (2) The speed of the winch is not well controlled during linkage, and the synchronization is not good, which may easily cause a certain winch to be over-pulled or loose and messy;

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