Arm support link mechanism, folding type arm support and concrete pump vehicle

Abstract

The invention discloses an arm frame linkage mechanism, which comprises a first arm frame, a second arm frame, a first linkage, a second linkage, and an oil cylinder, wherein the firs arm frame is hinged with the second arm frame, and one end of the oil cylinder is hinged at the hinge point of the first arm frame and the second arm frame; the head ends of the first linkage, the second linkage are respectively hinged on the first arm frame and the second arm frame; and the tail ends of the first linkage and the second linkage are respectively hinged on the oil cylinder. Because one end of the oil cylinder can be vacant, the arm frames need no oil cylinder seat, and the oil cylinder seat mounting problem can not be considered, the structure design of the arm frames can be greatly simplified; and the linkages adopt simple two hole type, so the structure is simple, and the weight is lighter. For the oil cylinder seat is omitted, not only the latent fault initiated by the tearing of the oil cylinder seat is avoided and the equipment fault rate is reduced, but also the whole vehicle weight of the equipment can be reduced. On the base, the invention also discloses a foldable arm frame and a concrete pump truck.

Description

technical field [0001] The invention relates to a transmission device mainly including a pull rod or a lever, in particular to an arm frame linkage mechanism, a foldable arm frame and a concrete pump truck. Background technique [0002] With the continuous and stable development of the global economy, especially the acceleration of domestic urbanization, it provides a good opportunity for the development of concrete pumping machinery. In this environment, the technology of concrete pump trucks (referred to as pump trucks) is advancing by leaps and bounds, and the products are becoming more and more perfect. At present, longer booms are one of the main trends in the development of concrete pump trucks. In order to make the opening space of the boom lower and the structural layout more compact, the boom of the concrete pump truck adopts Z-shaped, R-shaped, RZ-shaped, M-shaped and other vehicle folding methods. These folding methods can be classified into two categories, name...

AI Technical Summary

Problems solved by technology

[0004]The above-mentioned arm frame link mechanism can easily realize the upward and reverse folding of the arm frame, but there are still the following deficiencies: First, the structural form of the arm frame and the connecting rod is relatively complicated ; The second is that the 6 places of the oil cylinder seat are easy to crack, causing the equipment to malfunction; the third is that the quality of the equipment is relatively heavy

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