Patent ID: 8033364

Claim:
A gap adjusting mechanism of a wet brake, comprising: an adjusting member having a shaft portion which penetrates a housing of the wet brake and is rotatably disposed about an axis thereof and a convex portion which is formed on one end portion of the shaft position, the one end portion of the shaft portion inserted into the housing and another end portion of the shaft portion disposed outside of the housing; gap adjusting means accommodated in the housing, the gap adjusting means engaged with the convex portion of the adjusting member for adjusting a gap formed between a disk and a piston of the wet brake owing to rotation of the adjusting member, the disk and the piston accommodated in the housing; a lever fixed to another end portion of the shaft portion of the adjusting member, the lever rotating together with the shaft portion; a regulating bolt screwed into a screw hole formed in the housing, the regulating bolt moving forward/backward with respect to the screw hole by being rotated about an axis thereof for regulating a rotational position of the lever with a tip end portion of the regulating bolt abutting against the lever in a rotational direction of the lever; a regulating bolt fixing member capable of fixing a forward/backward position of the regulating bolt with respect to the screw hole; and a fixing bolt capable of fixing a rotational position of the lever with respect to the housing, wherein the lever includes a slot elongated in a rotational direction thereof, and the fixing bolt is capable of being inserted into the slot for fixing the lever to the housing, and wherein the gap adjusting means includes: a positioning plate for regulating a return position of the piston by abutting against the piston from the opposite side of the disk, the positioning plate having a cutout engaged with the convex portion of the adjusting member, the positioning plate rotated in a circumferential direction of the positioning plate due to the rotation of the adjusting member; and at least one gap forming member engaged with the positioning plate for adjusting the gap formed between the disk and the piston by moving the positioning plate in an axial direction of the positioning plate due to the rotation of the positioning plate in the circumferential direction of the positioning plate.