Installation structure of multi-stage telescopic outriggers and engineering machinery

Abstract

The invention discloses a mounting structure for multi-stage retractable legs and engineering machinery. The mounting structure includes multi-stage legs (10), a leg mounting platform (20) and a retractable driving device, wherein a retractable slideway (21) is arranged in the leg mounting platform; the adjacent legs in the multi-stage legs are mutually sleeved and are driven by the retractable driving device to perform retractable movement; the primary leg (1) in the multi-stage legs can be mounted in the retractable slideway in a sliding and retractable manner ; the retractable driving device includes at least one gear rack driving mechanism; the gear rack driving mechanism arranged between the primary leg and the leg mounting platform is used for pushing the primary leg in the multi-stage legs to perform retractable movement, and / or the gear rack driving mechanism arranged between the adjacent two legs in the multi-stage legs is used for pushing the internally-connected leg in the adjacent two legs to perform retractable movement. The mounting structure for multi-stage retractable legs, provided by the invention, has the advantages of simple structure, low cost and the like, and is convenient to mount, operate and maintain.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a mounting structure for multi-stage telescopic outriggers. Background technique [0002] Telescopic outriggers in construction machinery are often used to provide stable and reliable support for operating equipment. For example, in a concrete pump truck, as the pumping distance of the pump truck increases, the design length of the boom continues to increase, so that the overall stability of the pump truck is required to be higher when the boom is fully extended. At this time, more telescopic outriggers need to be used to support the car body. For example, three-stage telescopic outriggers are increasingly used in ultra-long boom pump trucks to obtain a wider range of stable support areas and make the support more stable. Stable and reliable. [0003] figure 1 It is a structural schematic diagram of a three-stage telescopic outrigger installation stru...

AI Technical Summary

Problems solved by technology

Among them, the structure of the scheme using the drive motor combined with the bundled oil cylinder is also relatively simple, the space requirement is not large, the manufacturing accuracy is easy to guarantee, and the technology is mature, but the disadvantage is that the number of drive motors and oil cylinders is large, the oil pipe layout is complicated, and the cost is relatively high.

When the driving scheme of driving motor combined with wire rope or chain is adopted, the structural weight is relatively light, which can reduce the weight of the entire multi-stage telescopic outrigger, but the disadvantage is that the layout and force analysis are more complicated, and the installation space requirements are higher, and it is not easy repair

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