Mining plow

Abstract

A coal mining mining plow comprising a plow base, two cutting bit carriers pivotably supported on a respective pivot pin, a roof cutting bit carrier attached to the plow base in a height-adjustable manner, and an attachment member settable on the plow base is disclosed. The attachment member may include ancillary cutting bit columns provided with extraction cutting bits. Each ancillary cutting bit column may be respectively positioned in its extraction position for a plow trip above a cutting bit carrier, and an intermediate member may be disposed between the attachment member and each ancillary cutting bit column. The intermediate member may be foldable attached to the attachment member and may be folded away into an installation position, in which the corresponding cutting bit carrier is removable while the attachment member and the intermediate part remain installed.

1 . A mining plow, in particular a coal mining plow, comprising:
 a plow base constructed to be guided on a reversible conveyor, the plow base having a pivot pin on an inclined supporting surface for pivotably supporting a cutting bit carrier in each direction of plow travel;   two cutting bit carriers pivotably supported on a respective pivot pin, including extraction cutting bits, and being pivotable in a travel-direction-dependent manner;   a roof cutting bit carrier attached to the plow base in a height-adjustable manner, and including roof cutting bit columns, the roof cutting bit carrier being removably anchorable at different heights to an attachment surface formed between the inclined supporting surfaces; and   an attachment member mountable on the plow base and elongating the attachment surface for the roof cutting bit carrier to increase the working height of the mining plow, the attachment member including ancillary cutting bit columns provided with extraction cutting bits and attached to the attachment member, wherein   each ancillary cutting bit column is respectively positioned in its extraction position for a plow trip above a cutting bit carrier, and   an intermediate member is disposed between the attachment member and each ancillary cutting bit column, the intermediate member being foldable attached to the attachment member and may be folded away into an installation position, in which the corresponding cutting bit carrier is removable while the attachment member and the intermediate part remain installed.   
     
     
         2 . The mining plow according to  claim 1 , wherein the ancillary cutting bit columns are attached to the intermediate parts so as to be partially pivotable about an axis. 
     
     
         3 . The mining plow according to  claim 2 , wherein the ancillary cutting bit columns are attached to the intermediate parts so as to be pivotable about pin stubs, which are integrally formed on a supporting body of the ancillary cutting bit column and are insertable into edge-open pin receptacles on the intermediate part in a defined pivot position between the intermediate parts and the ancillary cutting bit column. 
     
     
         4 . The mining plow according to  claim 3 , wherein the ancillary cutting bit columns and the intermediate parts are provided with hook projections, which lie opposite one another in the extraction position. 
     
     
         5 . The mining plow according to  claim 3 , wherein each ancillary cutting bit column is lockable to prevent pivoting back into a pivot position for removal by a chain-link-like securing element disposed on the associated intermediate part. 
     
     
         6 . The mining plow according to  claim 1 , wherein:
 latch pins are provided on an underside of the attachment member, and in the installation state the latch pins sit in latch recesses on the plow base, and/or   the attachment member is clampable onto the plow base using wedge-jaws that are movable using turnbuckles.   
     
     
         7 . The mining plow according to  claim 1 , wherein the intermediate part and the ancillary cutting bit column are movable about mutually parallel axes. 
     
     
         8 . The mining plow according to  claim 1 , wherein:
 the attachment surface on the plow base is laterally bounded by groove guides,   a front surface of the attachment member is provided with groove guides, and   the ancillary cutting bit columns are respectively disposed on both sides of the groove guides.   
     
     
         9 . The mining plow according to  claim 7 , wherein the axes extend parallel to the grooves on the fastening surface for the roof cutting bit carrier. 
     
     
         10 . The mining plow according to  claim 1 , wherein a rear side of the intermediate part is provided with a pressure plate, which abuts on the attachment member when the ancillary cutting bit column is disposed in the extraction position. 
     
     
         11 . The mining plow according to  claim 10 , wherein:
 an end face of the pressure plate abuts on an abutment surface on the attachment member in the direction of travel, and   the end face and the abutment surface preferably extend obliquely to the direction of travel.   
     
     
         12 . The mining plow according to  claim 10 , wherein the pressure plate is provided with an opening. 
     
     
         13 . The mining plow according to  claim 1 , wherein:
 receiving bores are respectively defined in the attachment member and in the intermediate part, and   locking screws extend through the receiving bores to fix the intermediate part in the extraction position and prevent folding back.   
     
     
         14 . The mining plow according to  claim 12 , wherein the receiving bores are formed in the intermediate part in the region of the opening.