Middle folding type foldable suspension arm of automobile crane

Abstract

Provided is a middle folding type foldable suspension arm of an automobile crane. A rotary seat is fixedly mounted on a base, two triangular middle columns are symmetrically and fixedly mounted on thefront side and the rear side of the rotary seat respectively, a cavity is formed between the two middle columns, the tops of the two middle columns are movably connected with the tail part of a second arm, a downward bending part is arranged at each of the head and the tail of the second arm, oil cylinder seats I are symmetrically and fixedly mounted on the outer sides of the two middle columns,front and rear sides of the middle front part of the second arm are symmetrically provided with oil cylinder seats II, a first variable-amplitude oil cylinder is connected between the oil cylinder seats I and the oil cylinder seat II, the head of the second arm is movably connected with a telescopic arm, first connecting rods are movably arranged on two sides of the tail of the telescopic arm, second connecting rods are movably arranged on two sides of a bending point of the head of the second arm, the section of the second arm is in an inverted U shape, the inner side of the bending point ofthe tail of the second arm is movably connected with a second variable-amplitude oil cylinders, and the other end of the second variable-amplitude oil cylinder is movably connected with the first connecting rods and the second connecting rods. According to the middle folding type foldable suspension arm of the automobile crane, the loading space is saved, goods are convenient to ship, and the transportation cost is saved.

Description

technical field [0001] The present application relates to the field of special-purpose vehicles, in particular to a middle-foldable folding boom of a truck crane. Background technique [0002] A car crane is a kind of crane installed on an ordinary car chassis or a special car chassis, and its driving cab is set separately from the lifting control room. The advantage of this kind of crane is good maneuverability and quick transfer. It is suitable for hoisting equipment in the field of low space. The chassis performance of the truck crane is better than that of the truck with the same total weight, which meets the technical requirements of road vehicles, so it can pass on various roads without hindrance. The lifting capacity ranges from 5 tons to 150 tons, and the number of chassis axles can range from 2 to 5 axles. It is the largest and most widely used type of crane. [0003] At present, there are three-section folding boom truck-mounted cranes installed on the market, b...

AI Technical Summary

Problems solved by technology

[0003] At present, there are three-section folding boom truck-mounted cranes installed on the market, but when the three-section folding boom is folded, the telescopic boom is not folded in the center, but eccentrically folded; therefore, it is easy to operate during hoisting. Eccentric force is generated, and the risk of safety accidents of the boom is high

And its structure is relatively complicated, and the maintenance cost is high

Images