Engineering machine

Abstract

The invention discloses an engineering machine comprising a chassis and a fixed rotating tower arranged on the chassis, wherein the fixed rotating tower is connected with a supporting leg device comprising a horizontal supporting leg and a first supporting leg connected to the tail end of the horizontal supporting leg; the fixed rotating tower comprises a turntable frame connected with a turntable of the engineering machine and a supporting leg frame fixed below the turntable frame, wherein the supporting leg frame comprises at least two connecting arms, and the outer end of each connecting arm is hinged with the horizontal supporting leg; any two adjacent connecting arms are intersected or extending lines of any two adjacent connecting arms are intersected; the horizontal supporting leg comprises at least two arm joints hinged in sequence, and a second driving part for driving any two adjacent arm joints to unfold and fold is arranged between the two adjacent arm joints; a root end arm joint in each arm joint is hinged with the connecting arms, a first driving part for driving the root end arm joint to unfold and fold is arranged between the root end arm joint and the connecting arms, and the first supporting leg is connected to the tail end of a tail end arm joint in each arm joint.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an engineering machinery comprising a fixed turret and a leg device. Background technique [0002] Many construction machinery need to use the turret device to realize the rotation of the boom frame during work, so as to ensure the working flexibility of the boom frame during the construction machinery work; mechanical support. The turret device usually includes several parts such as a fixed turret, a turret and a slewing mechanism; the fixed turret is the main body of the turret device and is the base for carrying the turret and legs; the turret can rotate relative to the fixed turret through the slewing mechanism, thereby It plays the role of driving the boom to rotate. The outrigger device is usually hinged to the fixed turret, which realizes the support and transition of the construction machinery through the expansion and contraction of the outriggers. [00...

AI Technical Summary

Problems solved by technology

[0006] However, the fixed turret of the above-mentioned box-type structure is large in volume and mass, uses more raw materials, and its structure is relatively heavy, and the impact of the concrete piston movement on the fixed turret during the working process of the pump truck is relatively large. The fixed turret is easy to vibrate, and the noise generated is large, and the heat dissipation performance is not good

In addition, the support arm 11', the standard arm 12' and the leg connecting arm 13' of the above-mentioned outrigger device are set inside the outrigger frame 14', and the telescopic movement is realized by the telescopic oil cylinder arranged inside the outrigger frame 14' , this structure is very complicated, and it is inconvenient to manufacture, process, assemble and disassemble, so the work efficiency of the concrete pump truck is low

Images