Built-in cable and hydraulic hose conveying device

Abstract

The invention discloses a built-in cable and hydraulic hose conveying device. The rear end of a middle arm link is provided with a first guide part; a cable and a hydraulic hose enter a cavity between a bottom arm link and the middle arm link from the head part of the bottom arm link respectively and turn to the inner cavity of a top arm link after going around the first guide part; when the top arm link and the middle arm link of a telescopic box type arm extend out, the cable and the hydraulic hose in the top arm link move with the top arm link, and at the same time, the first guide part moves with the middle arm link; and the cable and the hydraulic hose can extend at the same time, namely, the cable and the hydraulic hose can synchronously perform telescopic movement with the telescopic frame to complete the transmission of power and signals. Preferably, a tensioning device is arranged on the outside surface of the bottom arm link between a second guide part and a first fixed partto keep the cable and the hydraulic hose in a tensioned state, so that potential accidents caused by the looseness of the cable and the hose are avoided.

Description

technical field [0001] The invention relates to the power and control signal transmission technology of the working parts on the telescopic box-shaped arm, in particular to a built-in cable and hydraulic hose transmission device. Background technique [0002] Telescopic box-arm fire trucks and high-altitude operation vehicles are equipped with fire-fighting bubbles or working platforms on the top of the boom, which can realize functions such as water spraying, rescue, and high-altitude operations. When working, it is necessary to get off the vehicle to provide power source and control signal through the cable hydraulic pipeline transmission system. [0003] There are three layout methods of the traditional cable hydraulic pipeline conveying system: external type, built-in type and hybrid type. Among them, the structure of the external cable hydraulic pipeline conveying system is more complicated, the appearance is difficult to handle, and the cost is high; the built-in cabl...

AI Technical Summary

Problems solved by technology

Among them, the structure of the external cable hydraulic pipeline conveying system is more complicated, the appearance is difficult to handle, and the cost is high; the built-in cable hydraulic pipeline conveying system is mostly supported by a drag chain, and the entire conveying system is composed of a drag chain and a guide box, such as As shown in Figure 1, the hydraulic pipeline and cable pipe are arranged in the drag chain, supported by the drag chain, and the cable hydraulic pipeline and the drag chain follow

The drag chain moves with the synchronous expansion and contraction of each section of the arm, thereby ensuring the transmission of signals and power, and solving the problem of difficult appearance and processing of the external structure.

[0004] However, this kind of structural arrangement requires a lot of space, and for the jib structure with a more complex structure and the jib form with a smaller cross-section, the arrangement is difficult and difficult to realize; in addition, the existing built-in unsupported cable hydraulic pipeline transportation system, It is not easy to adjust after the cables and hydraulic hoses are loose during use, and it is easy to bury hidden dangers of accidents and endanger the safety of users

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