Telescopic type hydraulic self-centering mechanism

The invention relates to a telescopic type hydraulic self-centering mechanism. The telescopic type hydraulic self-centering mechanism comprises an upper cylinder body and an upper end cover, wherein afirst piston is arranged in the upper cylinder body; a wedge-shaped surface is arranged in the peripheral direction of the upper end of the first piston; a slide hole is formed in the peripheral direction of the upper end of the upper cylinder body; a slide head is arranged in the slide hole; the inner end of the slide head is a wedge-shaped end, and the wedge-shaped end is adaptive to the wedge-shaped surface; the outer end of the slide head is connected with a positioning head; and a first oil hole is formed in the cylinder bottom of the upper cylinder body. The telescopic type hydraulic self-centering mechanism is characterized in that the lower end of the upper cylinder body is provided with a lower extending section; a lower cylinder body is arranged outside the upper cylinder body and the lower extending se