Telescopic support leg device and engineering machinery

Abstract

The invention discloses a telescopic support leg device of engineering machinery, which comprises a fixed leg and a movable leg, wherein the movable leg is connected with the fixed leg through a horizontal unfolding cylinder, the tail end of the movable leg (11) is provided with a support cylinder (3), a telescopic rod of the unfolding cylinder (2) is provided with a fluid passage, a rodless cavity of the support cylinder (3) is communicated with an external fluid pipeline of the fixed leg through a rodless cavity of the unfolding cylinder (2) and thea fluid passage (211), in addition, an elastic element extending and retracting in the vertical direction is arranged in the support cylinder (3), one end of the elastic element is connected with the top wall or the bottom wall of the support cylinder (3), and the other end of the elastic element is connected with a support rod (32) of the support cylinder (3). The telescopic support leg device has the advantages that the arrangement of work pipelines of the support cylinder is very simple, the installation and the maintenance are more convenient, in addition, when the arrangement mode is adopted, the friction damage between a support leg and the work pipeline of the support cylinderleg when the support leg extends and retracts is avoided, and the work reliability of the support cylinder is enhanced. In addition, the invention also discloses the engineering machinery comprising the telescopic support leg device.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a telescopic outrigger device of an engineering machinery. In addition, the present invention also relates to a construction machine comprising the above telescopic outrigger device. Background technique [0002] Large-scale construction machinery such as port tire cranes and concrete pump trucks are widely used in ports, mines, high-rise buildings, and national defense engineering fields. In order to meet the needs of safe and stable operations, telescopic outriggers are generally installed around the frame. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a typical telescopic outrigger device in the prior art. [0004] The telescopic outrigger 1' includes a fixed leg connected to the vehicle frame. The fixed leg is generally a box structure with movable legs nested inside. A telescopic oil cylinder is arranged between the fix...

AI Technical Summary

Problems solved by technology

[0007] However, the internal space of the outrigger is relatively small, and the installation and maintenance of the towline is more troublesome, and the work of the towline requires enough space, so the internal structure of the telescopic outrigger 1' must have a relatively large space, and even the interior must be empty and cannot be reinforced. board to increase the strength of the outrigger and affect the use strength of the outrigger

[0008] Moreover, the oil pipe 3' inside the telescopic outrigger 1' is not only difficult to assemble, but also inconvenient to replace.

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