Hydraulic support and bottom lifting device thereof

Abstract

The invention discloses a bottom lifting device of a hydraulic support, comprising a bottom lifting jack and a crow plate, wherein, the external end part of the crow plate and a base are hinged with a rotation shaft; the internal end part of the crow plate suspends on air; the two ends of the bottom lifting jack are respectively hinged with the base and the middle part of the crow plate; the crow plate comprises a horizontal part parallel to the lower flat surface of the base of the hydraulic support; and the range of the included angle between the axis of the bottom lifting jack and the horizontal part parallel to the lower flat surface of the base is 0-45 degrees. The bottom lifting device provided by the invention only occupies small longitudinal space, can be suitable for the bottom-sealing-type base, the enforced condition of pushing and moving the jack and a push rod is improved, and the service life of the bottom lifting device is prolonged. The invention also discloses a hydraulic support comprising the bottom lifting device.

Description

technical field [0001] The invention relates to the technical field of coal mine machinery, in particular to a bottom lifting device for a hydraulic support. In addition, the present invention also relates to a hydraulic support comprising the above-mentioned bottom lifting device. Background technique [0002] my country is the main coal-producing country in the world. The total number of coal mines exceeds the sum of the number of coal mines in all other countries in the world. Comprehensive mechanized coal mining has also become the main method of mining coal seams. [0003] The hydraulic support is the support equipment for comprehensive mechanized coal mining. Its main function is to support the roof of the stope, maintain the working space of the shearer and scraper conveyor and other equipment, and promote the forward movement of the coal mining equipment and itself. The front end of the moving frame of the hydraulic support is generally connected with equipment such...

AI Technical Summary

Problems solved by technology

[0010] When the hydraulic support and the mining and transportation equipment are not at the same level, the scraper conveyor connected to it is on the floor higher than the plane of the hydraulic support, and the front part of the push rod 13 is suspended, and the scraper conveyor will give the push rod 13 an upward movement. Support the reaction force, so that the push rod 13 not only bears the push-pull force of the push-pull jack, but also bears the bending force generated by the bottom-lifting jack, so that the push rod 13 bears the joint action of tension and bending moment, and is relatively easy to damage

Images