Integrated internal-expanding type mechanical-locking hydraulic supporting leg and operating method thereof

Abstract

The invention discloses an integrated internal-expanding type mechanical-locking hydraulic supporting leg and an operating method thereof. The integrated internal-expanding type mechanical-locking hydraulic supporting leg comprises a cylinder barrel and a piston rod which is located in the cylinder barrel and also used as a supporting piece. A piston of the piston rod is divided into an upper end cover piston part, a spiral pipe sleeve and a lower end cover piston part. The upper end cover piston part is fixed to the piston rod. The piston rod is sleeved with the lower end cover piston part in a clearance fit mode. The piston rod is also sleeved with the spiral pipe sleeve in a clearance fit mode, and the spiral pipe sleeve is limited and clamped between the upper end cover piston part and the lower end cover piston part. A spiral grooved cavity is formed in the outer circumferential surface of the spiral pipe sleeve. Two oil guiding holes are symmetrically formed in the piston rod in the axial direction. A first oil guiding rod and a second oil guiding rod are connected into the two oil guiding holes correspondingly, and the spiral grooved cavity can be connected with an oil inlet / outlet path of the hydraulic supporting leg in a communicating mode through the first oil guiding rod and the second oil guiding rod. According to the integrated internal-expanding type mechanical-locking hydraulic supporting leg, all sequential motion functions of unlocking, stretching, locking, retreating, recovering and the like of the supporting legs are achieved in the way of integrating a plurality of hydraulic control elements in a piston assembly.

Description

technical field [0001] The invention relates to a hydraulic support device, in particular to an integrated internal expansion mechanical locking hydraulic support leg and an operating method thereof. Background technique [0002] In the hydraulic support leveling system of special heavy-duty engineering vehicles, in order to ensure the durability of support leveling accuracy, internal expansion mechanical locking hydraulic outriggers are generally used as the support leveling mechanism. In principle, the internal expansion mechanical locking outrigger requires that the mechanical lock must be released hydraulically before the telescopic adjustment function of the hydraulic outrigger can be realized. At present, the high-pressure unlocking oil circuit of the internal expansion mechanical locking hydraulic outrigger is generally set separately in the outrigger structure, and works independently of the oil inlet and oil return drive oil circuits of the outrigger. These three o...

AI Technical Summary

Problems solved by technology

These three oil circuits need to be connected to the on-board hydraulic power system through three external oil pipes on the hydraulic outrigger. Therefore, compared with the hydraulic outriggers of ordinary engineering vehicles, the number of oil ports of the internal expansion mechanical locking hydraulic outriggers is increased. In the process, there are disadvantages such as the vehicle hydraulic system needs to be modified, the installation space is small, the pipeline layout is complicated, and there are many oil leakage points.

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