Construction vehicle and arm support supporting device thereof

Abstract

The invention discloses an arm support supporting device which is used for supporting an arm support (2) of a construction vehicle. The arm support supporting device comprises a main oil cylinder (3) for supporting the arm support (2) and an auxiliary oil cylinder (4), wherein a preset distance is reserved between the main oil cylinder (3) and the auxiliary oil cylinder (4); and the arm support (2) is lapped on the upper surface of the auxiliary oil cylinder (4). The arm support is commonly supported by the auxiliary oil cylinder and the main oil cylinder, thus the pressure of the main oil cylinder is effectively reduced; the problem that the variable amplitude torque is insufficient at the initial stage of variable amplitude of the arm support is effectively improved; the operation capability of the variable amplitude of the construction vehicle can be improved; the weight of the main oil cylinder can be reduced; and the arrangement property of the construction vehicle is improved; the invention provides a novel structural arrangement mode and a solution for large-scale development of the construction vehicle and the arm support thereof; in addition, the buffer during variable amplitude drop of the arm support can be realized, and thus the reliability of the construction vehicle is improved. The invention further provides the construction vehicle comprising the arm support supporting device. The reliability of the construction vehicle is improved.

Description

technical field [0001] The invention relates to the field of engineering vehicles, in particular to a boom support device for engineering vehicles. In addition, the present invention also relates to an engineering vehicle comprising the above-mentioned jib support device. Background technique [0002] With the rapid development of my country's economic construction, the market demand for engineering vehicles, especially large-tonnage engineering vehicles, is increasing day by day. Therefore, the commonly used engineering vehicles are developing toward the direction of large-scale; large-scale is an important design goal of engineering vehicles. [0003] Taking high-altitude fire trucks or aerial work vehicles as examples, boom-type fire trucks and large-scale aerial work 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. With the continuous d...

AI Technical Summary

Problems solved by technology

[0007] If the size of the luffing cylinder 13 is increased, the layout of the entire luffing mechanism will be difficult and the overall weight will increase, which will affect some performance parameters of the engineering vehicle

In the case of no increase in cylinder diameter, the luffing force required for the luffing operation is very large at the initial stage of the luffing operation, and the luffing force of the luffing cylinder 13 can no longer meet the needs of the luffing operation

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