Self-adaptive bearing clearance spacer ring of double-edged hob

The utility model belongs to the technical field of tunnel excavator accessories, and discloses a double-edged hob self-adaptive bearing clearance spacer ring which comprises a self-adaptive bearing clearance adjusting spacer ring, the top of the self-adaptive bearing clearance adjusting spacer ring is connected with a lower end cover through a stop plate, an upper end cover is arranged at the top of the lower end cover, and a bearing clearance adjusting spacer ring is arranged at the top of the upper end cover. The top of the upper end cover is provided with a hob hub, the hob hub and the upper end cover are in sealing connection through a floating seal, the top of the hob hub is provided with a hob ring clamping ring, and hob rings are symmetrically distributed on the top of the hob ring clamping ring; according to the utility model, the design is simple and practical, and the tunnel boring machine can be normally propelled in a hard rock stratum with the rock stratum strength of more than 150MPa, so that t