MEASURING DEVICE FOR CUTTER BIT WEAR HEIGHT

摘要

PROBLEM TO BE SOLVED: To provide a device for measuring cutter bit wear height capable of steplessly and successively obtaining the wear height of a bit.;SOLUTION: The device for measuring the wear height of the cutter bit 2 mounted on a cutter frame 1 is installed on a front part of a tunnel excavator, and driven and rotated includes a housing 5 supported by the cutter frame 1 and brought into slide contact with a working face 4, and worn along with the cutter bit 2 and has a wear detection member 6 embedded in the housing 5, formed into a shape with its cross-sectional area increasing from the front part toward the back part with respect to a digging direction, brought into slide contact with the working face 4, and worn along with the housing 5; and a sensor 8 disposed at the back part of the wear detection member 6 and detecting the load on the wear detecting member 6 from the working face 4. The housing 5 and the wear detecting member 6 are brought into slide contact with the working face 4 and worn so that the area of a soil pressure receiving surface 63 of the wear detecting member 6 exposed from the housing 5 to the working face 4 is gradually increased.;COPYRIGHT: (C)2008,JPO&INPIT