Three-freedom-degree parallel hydraulic support

Abstract

The invention discloses a three-freedom-degree parallel hydraulic support which comprises a base, a front parallel supporting mechanism, a rear parallel supporting mechanism, a rear shielding device, a top beam and a stretchable beam. The front parallel supporting mechanism and the rear parallel supporting mechanism are connected between the base and the top beam in parallel, are completely same in structure and are both parallel mechanisms of 3-RPC structures. The rear shielding device is located at the rear end of the rear parallel supporting mechanism and respectively connected with the base and the top beam through hinges, and the lower end of the rear shielding device is provided with a bottom guard plate with the adjustable position and the adjustable angle. Top lateral guard plates are arranged on the two sides of the top beam, the stretchable beam is embedded inside the top beam, and a side protection plate is arranged at the head of the stretchable beam. According to the three-freedom-degree parallel hydraulic support, the technical defects of an existing hydraulic support can be overcome, loads, including the lateral force, in three space freedom degree directions can be borne, safety accidents such as support falling can be avoided, the supporting stability and the adaptability to surrounding rock of the hydraulic support can be improved, and the three-freedom-degree parallel hydraulic support further has the advantages of being stable and reliable in quality, rapid and convenient to operate and maintain and the like.

Description

technical field [0001] The invention relates to the technical field of mining machinery, in particular to a three-degree-of-freedom parallel hydraulic support capable of bearing lateral forces. Background technique [0002] Fully mechanized coal mining equipment consists of hydraulic supports, shearers and transporters. Hydraulic supports are the main equipment for comprehensive mechanized coal mining. The one-time investment accounts for more than 70% of the total cost of fully mechanized mining equipment. key. The top and bottom plates of the hydraulic support must adapt to the coal seam environment of the underground working face, provide a safe working space for the operator, and provide an effective power source for the mining and transportation equipment, which determines the normal advancing speed of the mining and transportation equipment. Therefore, the hydraulic support is the key equipment for the success or failure of the fully mechanized mining face to achieve ...

AI Technical Summary

Problems solved by technology

However, a series of problems such as the support stability based on the four-link hydraulic support, the adaptability to the roof and the controllability of the support have not been completely resolved.

Excessive degrees of freedom not only complicate the structure of the hydraulic support, increase the difficulty of processing, and make it difficult to improve the machining accuracy, but also increase the manufacturing cost of the hydraulic support, and bring difficulties and inconvenience to control, operation and maintenance.

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