Telescopic support leg device and arm support type engineering machinery equipment

Abstract

The invention relates to a telescopic support leg device and arm support type engineering machinery equipment. The telescopic support leg device comprises a support leg box, a primary telescopic support leg, a secondary telescopic support leg, a twin telescopic oil cylinder, a support leg oil cylinder and a tow chain system, wherein the tow chain system is arranged in the secondary telescopic support leg; the cylinder ends of a primary telescopic oil cylinder and a secondary telescopic oil cylinder in the twin telescopic oil cylinder are fixed in the primary telescopic support leg, and are communicated with each other; the piston rod end of the primary telescopic oil cylinder is fixed in the support leg box; the piston rod end of the secondary telescopic oil cylinder is fixed in the secondary telescopic support leg; the tow chain system comprises a tow chain and a linkage pipeline placed in the tow chain; the fixed end of the tow chain is fixed in the support leg box; the movable end of the tow chain is fixed in the secondary telescopic support leg; and the linkage pipeline in the tow chain comprises a first hydraulic rubber hose of which one end is connected with the rod-including cavity of the secondary telescopic oil cylinder. Due to the adoption of the telescopic support leg device, the reliability of moving pipelines can be ensured, and convenience is brought to the installation of the telescopic support leg device.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a telescopic outrigger device and boom type construction machinery equipment. Background technique [0002] At present, it is often necessary to unfold and stretch out the folding arm frame and turn it at a certain angle when operating engineering machinery and equipment such as wheeled cranes and concrete pump trucks. This working state will bring two problems: one is that the arm The frame stretches out and the center of gravity moves outwards and causes the whole vehicle to overturn; the second is that the vibration and heavy objects hoisted during the operation of the whole vehicle will cause a fatal accident of crushing the tire. [0003] In order to solve these two problems, outrigger devices are often installed around the vehicle frame on this type of construction machinery at present, and the outrigger devices are connected on the vehicle frame by means such as pin s...

AI Technical Summary

Problems solved by technology

[0002] At present, it is often necessary to unfold and stretch out the folding arm frame and turn it at a certain angle when operating engineering machinery and equipment such as wheeled cranes and concrete pump trucks. This working state will bring two problems: one is that the arm If the frame stretches out and moves the center of gravity outward, the whole vehicle will overturn; secondly, the vibration and heavy lifting during the operation of the whole vehicle will lead to a fatal accident of crushing the tire

[0005] In the existing outrigger telescopic mechanism, the hose reel is used in conjunction with the twin hoses, and the twin hoses are installed between the first-stage telescopic outrigger and the second-stage telescopic outrigger. There is relative movement between the legs and the secondary telescopic outriggers, which requires high processing requirements for the outrigger structural parts. The outrigger structural parts belong to the box welded parts, and deformation after welding is difficult to avoid. Stress deformation is also unavoidable, these factors will increase the failure rate of twin hoses

[0006] In addition, the hose reel is retracted by its own spring force, and there must be a pre-tightening force during installation, and there are strict requirements on the size of the pre-tightening force, so the installation requirements for the hose reel are high. If the pre-tightening force is set The inappropriateness of the hose reel is also likely to increase the failure rate of the hose reel

The high failure rate of twin hoses and hose reels directly leads to the unreliability of the outrigger telescopic system

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