Boom device and construction machinery

Abstract

The invention provides an arm support device for engineering machinery, comprising a first joint arm and a second joint arm, and a first joint shaft and a second joint shaft, the first joint shaft and the second joint shaft are cross-fixed and The axes of the two are perpendicular, the two ends of the first coupling shaft are respectively rotatably mounted on the first joint arm, and the two ends of the second coupling shaft are respectively rotatably mounted on the second joint arm; The first driving mechanism, the first driving mechanism can drive the first joint arm and the first coupling shaft to rotate relatively; the second joint arm is equipped with a second driving mechanism, and the second driving mechanism can drive the second joint arm and the second coupling shaft relative rotation. The invention also provides a construction machine. The technical solution provided by the invention adopts the imitation universal joint transmission mode, and has a simple structure. The boom can swing in the vertical direction and / or horizontal direction, and the flexibility of fabric distribution is greatly improved. When rotating in a small range, there is no need to start the turntable, which saves energy. consumption.

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

Images