A hob fixing structure
By designing the clamping inclined surface and tensioning components in the cutter fixing structure, the problem of cutter loosening and falling off was solved, achieving a stable connection and easy assembly of the cutters, and improving the rock breaking efficiency of the tunnel boring machine.
CN224314987UActive Publication Date: 2026-06-02CHINA RAILWAY CHINA TUNNEL JOINT HEAVY EQUIP CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY CHINA TUNNEL JOINT HEAVY EQUIP CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
The existing cutter head fixing structure is not secure enough, which makes the cutter head easy to loosen and fall off when tunneling in hard rock, affecting the cutterhead structure and the normal rock breaking operation of the tunnel boring machine.
Method used
The fixed structure includes a hob, a cutter box component, a connecting shaft, a tensioning block, a locking block, and a tensioning assembly. The hob is securely connected through the cooperation of the clamping inclined surface and the tensioning assembly.
Benefits of technology
It enables simple assembly and stable connection of the cutterhead, avoids loosening and falling off of the cutterhead, and improves the rock breaking efficiency of the cutterhead and the tunneling stability of the tunnel boring machine.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224314987U_ABST
Abstract
This utility model relates to the field of tunnel boring machine technology and discloses a cutterhead fixing structure, including a cutterhead and cutterhead box components. Two cutterhead box components are provided and arranged opposite each other. The cutterhead is located between the two cutterhead box components. Connecting shafts are provided at both ends of the cutterhead. The cutterhead box component includes a box body, a tensioning block, a locking block, and a tensioning assembly. The end of the box body near the cutter has a fixing groove for the connecting shaft to extend into. One side of the fixing groove is connected to a vertically arranged mounting groove. The tensioning block is fixed to the bottom of the mounting groove. The locking block is slidably connected to the mounting groove. The side of the locking block near the mounting groove has a pressing inclined surface. The pressing inclined surface gradually slopes away from the fixing groove from top to bottom, pressing the connecting shaft. The locking block is connected to the tensioning block through the tensioning assembly, which can drive the locking block to move closer to the tensioning block. This utility model is easy to assemble and has a robust structure.
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