Circular cutter box for two-way exchange of disc hobs

Abstract

The invention relates to the technical field of tunnel boring machine engineering machinery. A circular cutter box capable of bidirectionally replacing disc-shaped hobs, comprising a cylindrical ring-shaped cutter box body fixed on the cutter head and two centrally symmetrical hobs arranged inside the cutter box body Shaft fastening unit, the hob shaft fastening unit includes a load-bearing guide bar fixed on the inner wall of the knife box box, a limit position fixed on the inner wall of the knife box box and correspondingly set at a certain angle with the load-bearing guide bar Guide bars, and wedge-shaped compression blocks, tension blocks, tension bolts and nuts that are matched and arranged between the load guide bars and the limit guide bars. The circular cutter box of the present invention can respectively realize the replacement of the disc-shaped hob from the back of the cutter head and the front of the cutter head. For hob replacement during production, assembly and commissioning, the cutter box has a circular structure, which can save space and uniform force on the cutter head.

Description

technical field [0001] The invention relates to the technical field of tunnel boring machine construction machinery, in particular to a circular cutter box capable of bidirectionally replacing disc-shaped hobs. Background technique [0002] The disc-shaped hob installed on the cutter head is the main tool for excavating the tunnel of the tunnel boring machine. During the construction process of the tunnel boring machine, the hob is a wearable part and needs to be replaced frequently. There are two ways to replace the hob at present, one is to replace it at the front side of the cutter head, and the other is to replace it at the back of the cutter head. [0003] When replacing the hob in front of the cutterhead, the cutterhead of the tunnel boring machine needs to be moved back a certain distance, and personnel enter the gap between the cutterhead and the tunnel face for replacement. This kind of operation not only has the risk of face instability, but also has the disadvant...

AI Technical Summary

Problems solved by technology

At present, the shape of the tool box that can be used for back tool change is rectangular. The rectangular tool box is a panel structure, and stress concentration is easy to occur at the four corners of the rectangle. The overall structure of the disc; in addition, the rectangular tool box that can meet the tool change on the back has a larger size in the direction of the long side of the rectangle, which leads to a reduction in the overall strength of the cutter head when more tool boxes are arranged on the cutter head

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