Shield machine roller cutter back mounting type self-positioning fixing device

Abstract

The invention relates to a rear-mounting type self-positioning fixing device for a hobbing cutter of a shield machine, which is applied to the field of mechanical engineering technology of the shield machine. The whole device consists of a bolt, a wedgy pressing block, a heteromorphic nut, a hobbing cutter shaft, a tool apron, the hobbing cutter and a O-shaped sealing ring; the heteromorphic nut is matched with the O-shaped sealing ring for use; the hobbing cutter shaft is manufactured into a shape matched with a hobbing cutter shaft fixing part of a lateral panel of the tool apron and is contacted with the lateral panel of the tool apron for positioning; the third plane of the end of the hobbing cutter shaft is contacted with the lateral face of the wedgy pressing block; the hobbing cutter is arranged on the hobbing cutter shaft, is pressed and is fixed on the lateral panel of the tool apron through the wedgy pressing block in the process of screwing the heteromorphic nut by the bolt; and in the process, the hobbing cutter realizes automatic and accurate positioning of mounting simultaneously, and two ends of the heteromorphic nut are provided with the O-shaped sealing ring respectively which prevents the bolt and the heteromorphic nut from rusting and is convenient to detach in maintenance, thereby avoiding penetration of slurry and the like into a screw thread part in the construction process of the shield machine. The rear-mounting type self-positioning fixing device has the advantages of simple structure, accurate positioning, reliable mounting, easy replacement as well as convenient and rapid replacement and maintenance operation on the hobbing cutter in the construction process of the shield machine.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling machine construction machinery, and is mainly aimed at the fixing, installation and replacement of the disc-shaped hob of the shield tunneling machine. Background technique [0002] Full-face hard rock tunneling machines and compound shield tunneling machines mainly rely on disc-shaped hobs installed on the cutter head to roll and break the rock formations on the excavation surface. During the shield construction process, the knives are easy to wear and need Make a replacement. In general, during the construction process, the operating space for changing the tool is relatively narrow, and it is not easy to accurately position and fix the tool firmly. At the same time, due to the large vibration of the cutter head and the cutter, the connecting bolts are prone to loosening or falling off, and the cutter needs to be maintained or replaced regularly during the construction process. Therefo...

AI Technical Summary

Problems solved by technology

Usually, during the construction process, the operating space for changing the tool is relatively narrow, and it is not easy to accurately position the tool and fix it firmly.

At the same time, due to the large vibration of the cutter head and the cutter, the connecting bolts are prone to loosening or falling off, and the cutter needs to be maintained or replaced regularly during the construction process.

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