Hydraulic limit device and concrete pump truck

Abstract

The invention discloses a hydraulic limiting device and a concrete pump truck, relates to the technical field of engineering machinery and solves the technical problem of the proneness of locking failure and locking insecurity during swing leg locking in the prior art. The hydraulic limiting device comprises a hydraulic drive mechanism, a hydraulic actuating mechanism and a locking structure. The locking structure comprises a locking portion and a connecting portion, wherein the locking portion is connected with the hydraulic actuating mechanism, and the connecting portion is fixedly connected to a movable member of a leg swing cylinder into an integral structure. The hydraulic drive mechanism is connected to the hydraulic actuating mechanism and can drive the hydraulic actuating mechanism to drive the locking portion to move to a position blocking in the movement path of the connecting portion or to move to a position away from the movement path of the connecting portion. The concrete pump truck comprises a base, a swing leg, the leg swing cylinder and the hydraulic limiting device. The hydraulic limiting device and the concrete pump truck are used for improving the reliability and automation degree of the limiting device of the swing leg.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a hydraulic limiting device and a concrete pump truck provided with the hydraulic limiting device. Background technique [0002] Concrete pump truck is a kind of construction machinery that transports commercial concrete to designated locations. [0003] The unloading frame structure of a concrete pump truck generally consists of three parts: a slewing base, outriggers, and a subframe. In the outrigger structure of concrete pump truck, the front outriggers are mainly divided into swing structure, X telescopic structure and H-type structure; the rear outriggers are divided into swing structure and H-type structure. The legs of the swing structure are referred to as swing legs for short. The swing outrigger is a kind of outrigger that can rotate around a specified axis to realize swinging and retracting. The swing outriggers are assembled on both sides of the slew...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the limit of the swing leg is usually by manually locking the leg lock to limit the position of the swing leg. In actual production, due to the machining accuracy of the reaming hole for the swing leg The suspension height has a great influence, and it is difficult to guarantee the position of the outrigger lock due to this influence, and often the phenomenon that the lock cannot be locked or locked firmly

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