Automobile crane and rear supporting leg assembly thereof

Abstract

The invention relates to hoisting equipment, in particular to an automobile crane and a rear supporting leg assembly thereof. The rear supporting leg assembly comprises a horizontal supporting leg, asupporting leg, a hinge seat and a limiting structure, the hinge seat is arranged at the telescopic end of the horizontal supporting leg, the supporting leg is hinged to the hinge seat through a supporting leg hinge shaft, the supporting leg hinge shaft extends in the telescopic direction of the horizontal supporting leg, and a limiting pin shaft is detachably inserted in the hinge seat; and whenthe supporting leg is in a vertical state, the supporting leg is limited on the two sides of the rotating direction of the supporting leg. When supporting is needed, the limiting pin shaft is mountedand conduct limiting on the two sides of the supporting leg, so that the supporting leg is kept vertical; and when the automobile crane needs to turn in a narrow occasion, the limiting structure is dismantled, the supporting leg is obliquely supported on the ground, and after the supporting leg extends, the supporting leg pushes the tail of the automobile crane to enable the automobile crane to rotate by a certain angle to assist the automobile crane in steering, so that the passing performance of the automobile crane is improved.

Description

technical field [0001] The invention relates to a hoisting device, in particular to a car crane and a rear outrigger assembly thereof. Background technique [0002] A truck crane is a kind of crane mounted on a general-purpose vehicle chassis or a special chassis. The truck crane has the characteristics of fast driving speed and strong maneuverability. It is suitable for quickly changing the work site over a long distance, but it cannot be hoisted and driven, and the body is long and the turning radius is large, so the passing performance is poor. Usually, the truck crane is equipped with four outriggers, which are arranged on the chassis and arranged on both sides of the vehicle body in an H-shape or X-shape. When hoisting, the outriggers are extended to the ground to increase the span of the bearing surface. However, once the crane is hoisted at the rear and overloaded, it is easy to cause the front outrigger to lift off the ground, and even a rear tipping accident may oc...

AI Technical Summary

Problems solved by technology

However, once the crane is hoisted at the rear, once it is overloaded, it is easy to cause the front outrigger to lift off the ground, and even a rear tipping accident may occur in severe cases.

[0003] The Chinese utility model patent with the authorized notification number CN202131034U discloses a five-legged crane. The fifth outrigger, that is, the rear outrigger, is arranged on the chassis at the rear of the crane, which increases the span of the chassis and prevents the crane from tilting backward. However, due to the long body and large turning radius, it is difficult to turn in some narrow places and the passing performance is poor.

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