Hobbing cutter seat and key pin combined positioning structure for raise boring machine

Abstract

The invention discloses a hobbing cutter seat and key pin combined positioning structure for a raise boring machine. A hobbing cutter seat is in positioning connection with a cutter disc knife rest through multiple groups of positioning keys and positioning pins, wherein the sizes of the upper ends of the positioning keys are larger than the sizes of the lower ends of the positioning keys, the upper ends of the positioning keys are in transition connection with the hobbing cutter seat, and the lower ends of the positioning keys are in interference fitting connection with the cutter disc knife rest; and the sizes of the upper ends of the positioning pins are larger than the sizes of the lower ends of the positioning pins, the upper ends of the positioning pins are in transition connection with the hobbing cutter seat, and the lower ends of the positioning pins are in interference fitting connection with the cutter disc knife rest. The hobbing cutter seat has the beneficial effects that the processing is easy, the positioning is reliable, and the interchangeability is high.

Description

technical field [0001] The invention belongs to the technical field of mining machinery, and in particular relates to a hob seat key pin combination positioning structure for a raise drilling machine. Background technique [0002] Raise drilling rig, as an important mining equipment, is widely used in shaft construction with lower transport roadways and stable geological conditions. It mainly uses hydraulic transmission to make the hydraulic motor obtain rotary torque, drive the drilling tool system, drive the drill pipe and The drill bit rotates, and at the same time, the propulsion cylinder applies the drill bit for propulsion when drilling, and applies the cutterhead for anti-lifting force and acts on the rock when reaming. [0003] During the reaming operation of the raise drilling rig, the hob on the cutter head performs pure rolling cutting or slight displacement along the rock working face at the bottom of the well under the double action of rotation and backlifting, ...

AI Technical Summary

Problems solved by technology

The above two connection methods have the following disadvantages: the bolt connection makes it impossible to locate the cutter head and the hob seat during installation, and the installation accuracy is poor. During the reaming operation, the hob seat is prone to swing and rotate, and the hob seat is easily damaged. Low service life, need to be replaced frequently

However, if the welding method is used, the hob seat is fixedly connected with the cutter head holder. After the hob seat is damaged, it cannot be replaced separately, and the cutter head needs to be replaced as a whole. The maintenance cost is high, and it is not economical and practical.

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