Cantilever crane device and engineering machinery

Abstract

The invention provides a cantilever crane device, which is used for engineering machinery and comprises a first knuckle arm and a second knuckle arm. A transfer connection arm is arranged between the first knuckle arm and the second knuckle arm, one end of the transfer connection arm is hinged with the first knuckle arm via a first hinging shaft, the other end of the transfer connection arm is hinged with the second knuckle arm via a second hinging shaft, the axis of the first hinging shaft is perpendicular to that of the second hinging shaft, a first driving mechanism is disposed between the first knuckle arm and the transfer connection arm and can drive the transfer connection arm to rotate around the first hinging shaft, and a second driving mechanism is disposed between the transfer connection arm and the second knuckle arm, and can drive the second knuckle arm to rotate around the second hinging shaft. The invention further provides the engineering machinery. In the technical scheme, a cantilever crane can swing in a vertical direction and/or a horizontal direction by the aid of the transfer connection arm, flexibility is greatly improved, when the cantilever crane rotates within a small range, a rotary table does not need to be started, more energy is saved, and construction cost is reduced.

Description

technical field [0001] The invention relates to the field of construction machinery, and more specifically, to a boom device and construction machinery including the boom device. Background technique [0002] At present, a concrete pump truck generally includes a traveling device, a pumping device and a boom device. The walking device is mainly used for the transfer of the pump truck on the work site, and the pumping device and the boom device are mainly used for transporting concrete to the place where concrete is needed during the construction process. [0003] The boom device consists of multi-section booms hinged in turn, and the two adjacent booms mainly rotate in the vertical plane, and horizontal rotation cannot be realized; if horizontal rotation is required, the turntable can only be driven by the rotary motor and the reducer relative to the fixed The turret rotates, thereby realizing the horizontal rotation of the jib device. Due to the large volume and weight of...

AI Technical Summary

Problems solved by technology

Due to the large volume and weight of the boom device itself, this horizontal rotation method has a large inertia, which not only increases the energy consumption of the pump truck, but also has an adverse effect on the service life of the entire boom

[0004] Driving the turntable to rotate has the following disadvantages: the turntable has a large start-up load, high energy consumption, low sensitivity, and slow response speed; the center of gravity of the boom is easy to exceed the safe range

[0005] In the existing boom device, the relative movement between all the booms is limited to the rotation in the vertical plane, which limits the movement trajectory of the boom, affects the flexibility of the concrete pump truck, and has a dead point in the distribution, which affects the construction efficiency

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