Tunnel Boring Machine Back Mounted Disc Hob Fastening Device

Abstract

The invention discloses a back-mounted disc-shaped hobbing cutter fastening device of a tunneling machine. The back-mounted disc-shaped hobbing cutter fastening device comprises a wedge-shaped block, a compression block, a C-shaped block, a support seat and a fastening assembly, wherein the fastening assembly is used for connecting the wedge-shaped block and the compression block; the C-shaped block is fixedly arranged on the support seat; a hobbing cutter shaft is positioned in a groove of the C-shaped block; the inclined surface of the wedge-shaped block is tightly attached to the inclined surface of the hobbing cutter shaft; the back-mounted disc-shaped hobbing cutter fastening device also comprises a position limiting block positioned between the wedge-shaped block and the compression block; one side of the position limiting block is tightly attached to the inner wall of the support seat; the opposite other side of the position limiting block is tightly attached to the opening end of the C-shaped block. The back-mounted disc-shaped hobbing cutter fastening device has the advantages that the structure is simple; the cutter damage is effectively reduced; the service life of a cutter is prolonged; the repair cost is reduced.

Description

technical field [0001] The invention relates to a tunnel boring machine, in particular to a back-mounted disc hob fastening device for the tunnel boring machine. Background technique [0002] like figure 1 As shown, the existing tunnel boring machine (Tunnel Boring Machine, hereinafter referred to as TBM) back-mounted disc hob is installed and fastened by using the lock nut 1 and the screw rod 2 to pull the wedge block 3 to move toward the compression block 4, The slope of the wedge block 3 corresponds to the slope of the hob cutter shaft 51 , so that the hob cutter shaft 51 is wedged into the groove of the C-shaped block 6 . Because the C-shaped block 6 is fixed in the support seat 7 and cannot move backward, and the pressing block 4 is pressed in the support seat 7 and cannot move forward, thereby realizing the positioning of the hob cutter shaft 51 . [0003] During the construction of TBM tunnels, especially during the excavation of superhard rocks, since the hob cutte...

AI Technical Summary

Problems solved by technology

[0003] During the construction of TBM tunnels, especially during the excavation of superhard rocks, since the hob cutter ring 52 has a relatively large forward force, the hob cutter shaft 51 acts on the reverse thrust of the hob cutter ring 52 on the C-shaped block 6. On the rear side, the C-shaped block 6 is very easy to break, and the broken part will gradually move to the gap around the screw rod 2 during the vibration, and the broken part is easy to scratch and squeeze the end cover of the hob, which will cause the end cover to break and oil leakage to cause the cutter The rapid damage of the bearing increases the tool maintenance time and reduces the overall operating efficiency of the TBM equipment; in addition, with the movement of the fractured part, the fastening state of the hob cutter shaft 51 will also be destroyed, resulting in inaccurate positioning of the hob, and the hob cutter The ring 52 cannot roll according to the designed trajectory on the palm surface, which reduces the tunneling ability of the TBM equipment and further accelerates the damage of the tool

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