An automatic power anti-eccentric wear shield hob

Abstract

The invention relates to an automatic power anti-eccentric shield hob, which includes a cutter shaft, a cutter body and a cutter ring installed on the cutter body, a load-bearing device installed in the middle of the cutter shaft, and a load-bearing device symmetrically installed on both sides of the load-bearing device. The anti-eccentric wear device at the end; the cutter body is installed on the outer ring of the load-bearing device and the anti-eccentric wear device; the load-bearing device includes a roller and the first bearing, the roller is installed on the cutter shaft and can rotate synchronously with the cutter shaft, and the first bearing is installed On the roller, between the roller and the cutter body; the anti-eccentric wear device includes an elastic member, a pawl and a ratchet, one end of the elastic member is fixedly connected with the cutter shaft, and the other end is fixedly connected with the pawl, and the ratchet is installed in the cutter body and can be The cutter body rotates synchronously, and the inner edge of the ratchet is provided with a tooth-shaped groove adapted to the pawl. The invention installs anti-eccentric wear devices at both ends of the load-bearing device, which effectively avoids the phenomenon of eccentric wear of the hob, prolongs the cutting life of the hob, reduces the number of tool changes, and avoids accidents such as damage to the cutter ring caused by the eccentric grinding of the hob , effectively reducing the engineering cost.

Description

technical field [0001] The invention relates to the technical field of shield cutters used in underground engineering construction, in particular to an automatic power anti-eccentric wear shield hob. Background technique [0002] Since the beginning of the 21st century, the number of tunnel projects in my country has increased dramatically. The shield tunneling method has become the main method of tunnel construction due to its high degree of mechanization, fast excavation speed, strong adaptability, safety and high efficiency. As the undertaker of stratum excavation, the hob directly reflects the adaptability of the machine-soil / rock formation, and whether the hob can perform normal cutting operations directly affects the construction efficiency and cost. Under normal circumstances, during the tunneling process of the shield machine, the hob rotates along the cutter shaft under the friction force provided by the face, and uniform wear occurs. The degree of wear on the circu...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an automatic power anti-eccentric wear shield hob with high practicability, wide application range and good anti-eccentric wear performance in view of the above-mentioned problem that the hob of the existing shield machine is prone to partial wear , it can reduce hob eccentric wear in actual construction, improve hob performance, and prolong hob cutting life

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