Cutting disc with removable cutting portions

Abstract

A cutting device for engaging a rock face includes a disc body, receiving portions disposed circumferentially about an outer perimeter of the disc body, and cutting members. The disc body is supported for rotation about an axis of rotation. Each of the receiving portions includes a receiving surface and a plurality of carrier openings extending through the receiving surface. Each of the cutting members includes a peripheral edge and a plurality of cutting bits positioned on the peripheral edge. Each of the cutting members further includes a plurality of posts. Each of the plurality of posts engages an associated one of the plurality of carrier openings to releasably secure the cutting member against rotation relative to the receiving portion.

What is claimed is: 
     
         1 . A cutting device for engaging a rock face, the cutting device comprising:
 a disc body supported for rotation about an axis of rotation;   a plurality of receiving portions disposed circumferentially about an outer perimeter of the disc body, each of the receiving portions including a receiving surface and a plurality of carrier openings extending through the receiving surface;   a plurality of cutting members, each of the cutting members including a peripheral edge and a plurality of cutting bits positioned on the peripheral edge, each of the cutting members further including a plurality of posts, each of the plurality of posts engaging an associated one of the plurality of carrier openings to releasably secure the cutting member against rotation relative to the receiving portion.   
     
     
         2 . The cutting device of  claim 1 , wherein the cutting bits of each one of the cutting members are aligned with cutting bits of each adjacent cutting member. 
     
     
         3 . The cutting device of  claim 1 , wherein each one of the cutting members includes a wedge slot, and wherein inserting a wedge tool into the wedge slot applies leverage to facilitate removal of the cutting member from the disc body. 
     
     
         4 . The cutting device of  claim 1 , further comprising a plurality of first openings, each of the first openings extending between a base of an associated one of the carrier openings and a surface of the disc body. 
     
     
         5 . The cutting device of  claim 4 , further comprising a jacking bolt insertable into one of the first openings to urge one of the cutting members to separate from an associated one of the receiving portions. 
     
     
         6 . The cutting device of  claim 4 , wherein each post includes a stub shaft received by one of the first openings when the post is positioned in the carrier opening. 
     
     
         7 . The cutting device of  claim 6 , further comprising:
 a second opening extending between a second surface of the main body and the first opening;   a set screw positioned in the second opening and engaging a portion of the stub shaft within the first opening, thereby releasably securing the cutting member with respect to the disc body.   
     
     
         8 . The cutting device of  claim 6 , further comprising:
 a second opening extending between a second surface of the main body and the first opening;   a third opening extending through the stub shaft and aligned with the second opening; and   a retaining pin extending through the second opening and the third opening, the retaining pin inhibiting movement of the cutting member with respect to the disc body.   
     
     
         9 . The cutting device of  claim 6 , further comprising:
 a second opening extending between a second surface of the main body and the first opening;   a circular groove positioned on the stub shaft; and   a retaining pin extending through the second opening and into the first opening such that the retaining pin engages a portion of the groove, thereby releasably securing the cutting member with respect to the disc body.   
     
     
         10 . A cutting device for engaging a rock face, the cutting device comprising:
 a disc body supported for rotation about an axis of rotation, the disc body including an outer perimeter and a plurality of receiving portions positioned along the outer perimeter;   a plurality of cutting members, each cutting member including a peripheral edge and a plurality of cutting bits positioned on the peripheral edge, each of the cutting members releasably secured to an associated one of the receiving portions of the disc body;   a pair of coupling interfaces between each one of the receiving portions and an associated one of the cutting members, the pair of coupling interfaces releasably securing the cutting member against rotation relative to the receiving portion, each one of the pair of mating interfaces including,
 a protrusion positioned on one of the cutting member and the associated receiving portion, and 
 a carrier opening positioned on the other of the cutting member and the associated receiving portion, the carrier opening receiving the protrusion. 
   
     
     
         11 . The cutting device of  claim 10 , wherein each one of the pair of mating interfaces includes the protrusion positioned on the cutting member and the carrier opening positioned on the receiving portion, such that each cutting member includes a pair of protrusions and each receiving portion includes a pair of carrier openings. 
     
     
         12 . The cutting device of  claim 10 , further comprising:
 a first locking pin hole positioned on the cutting member, the first locking pin hole extending between a mating surface that engages the receiving portion and an external surface of the cutting member;   a second locking pin hole positioned on the receiving portion, the second locking pin hole extending between the receiving portion and a second surface of the disc body and aligned with the first locking pin hole; and   a locking pin extending through the first locking pin hole and the second locking pin hole, the locking pin releasably securing the cutting member with respect to the disc body.   
     
     
         13 . The cutting device of  claim 10 , further comprising:
 a hydraulic port positioned on the cutting member; and   a piston positioned adjacent a lower surface of the carrier opening, the piston in fluid communication with the hydraulic port.   
     
     
         14 . The cutting device of  claim 10 , further comprising:
 a receiving space positioned between adjacent carrier openings; and   a tapered lock clamp positioned between adjacent protrusions, the tapered lock clamp positioned in the receiving space,   wherein the tapered lock clamp has a first slanted surface engaging one of the protrusions and a second slanted surface positioned opposite the first slanted surface and engaging the other protrusion.   
     
     
         15 . The cutting device of  claim 14 , further comprising:
 a tapered lock clamp fastener hole extending through the tapered lock clamp;   a second opening extending between a second surface of the disc body and the receiving space; and   a fastener extending through the second opening and the tapered lock clamp fastener hole, thereby releasably securing the cutting member with respect to the disc body.   
     
     
         16 . The cutting device of  claim 10 , further comprising:
 two reaction zones positioned along the protrusions and circumscribing a perimeter of the protrusion; and   a recessed region positioned on each protrusions between the two reaction zones.   
     
     
         17 . The cutting device of  claim 16 , wherein the reaction zones are defined by a first diameter, and the recessed region is defined by a second diameter, and wherein the second diameter is smaller than the first diameter. 
     
     
         18 . The cutting device of  claim 16 , wherein a first reaction zone of the two reaction zones has a first diameter, wherein a second reaction zone of the two reaction zones has a second diameter, and wherein the first diameter is larger than the second diameter. 
     
     
         19 . The cutting device of  claim 18 , wherein the first reaction zone is positioned closer to the mating surface of the cutting member that engages the receiving portion than the second reaction zone. 
     
     
         20 . A cutting device for engaging a rock face, the cutting device comprising:
 a disc body supported for rotation about an axis of rotation, the disc body including an outer perimeter and a plurality of receiving portions positioned along the outer perimeter, each receiving portion including two carrier holes;   a plurality of cutting members, each of the cutting members including a first cutting member portion and a second cutting member portion, each cutting member portion including a body with a peripheral edge configured to support a plurality of cutting bits and a post configured to be received by one of the carrier holes connected to the body and extending outwardly therefrom; and   a tapered lock clamp positioned between the posts of the first cutting member portion and the second cutting member portion of each cutting member when the cutting member is installed on an associated receiving portion,   wherein a first surface of the tapered lock clamp engages the post of the first cutting member portion and a second surface of the tapered lock clamp opposing the first surface engages the post of the second cutting member portion such that the tapered lock clamp inhibits rotation of the first cutting member portion and the second cutting member portion with respect to one another and with respect to the disc body, and   wherein a tapered lock clamp fastener hole extends at least partially through the tapered lock clamp and is configured to receive a fastener that facilitates engagement between the tapered lock clamp and the disc body.