Working Tool for a Piece of Earth-Moving Machinery

Abstract

The invention relates to a working tool for a piece of earth-moving machinery comprising a digging device ( 10 ) that is embodied as a bucket or scoop and delimits an accommodation space ( 24 ) for the material that is to be excavated, and a built-on device ( 12 ) which is disposed on the digging device ( 10 ), and is provided with an additional tool ( 14, 16, 17 ) that is pivotable towards the charging hole ( 43 ) of the accommodation space ( 24 ) by means of a swivel drive ( 36 ). In order to increase the number of possible uses, the swivel drive ( 36 ) encompasses a swivel shaft ( 42 ) which is located above the charging hole ( 43 ) and extends along more than half the width thereof while the additional tool ( 14, 16, 17 ) can be fixed to the swivel shaft ( 42 ) via connecting means ( 50 ).

1 . A working tool for an earth-moving machine, in particular a digger, having a digging device ( 10 ) embodied as a scoop or bucket which is arranged so as to be pivotable on an arm of the earth-moving machine and delimits a receiving space ( 24 ) for the material to be excavated, and having an add-on device ( 12 ) which is arranged on the digging device ( 10 ) and can be detached from the arm as a modular unit with said digging device, which add-on device ( 12 ) has an auxiliary tool ( 14 ,  16 ,  17 ) which can be pivoted relative to the loading opening ( 43 ) of the receiving space ( 24 ) by means of a pivoting drive ( 36 ), characterized in that the pivoting drive ( 36 ) has a pivoting shaft ( 42 ), which is arranged above the loading opening ( 43 ) and extends over more than half of the width thereof, for a limited pivoting movement, and in that the auxiliary tool ( 14 ,  16 ,  17 ) can be fixed to the pivoting shaft ( 42 ) by connecting means ( 50 ) so as to be exchangeable and/or moveable in terms of position. 
   
   
       2 . The working tool as claimed in  claim 1 , characterized in that the pivoting shaft ( 42 ) runs parallel to and at a distance from the arm pin provided on the arm for a pivoting movement of the digging device ( 10 ). 
   
   
       3 . The working tool as claimed in  claim 1  or  2 , characterized in that the pivoting shaft ( 42 ) preferably extends in a linearly continuous fashion over the entire width of the loading opening ( 43 ). 
   
   
       4 . The working tool as claimed in one of  claims 1  to  3 , characterized in that the pivoting shaft ( 42 ) is axially and/or radially supported on mounting points ( 48 ) in the region of the lateral delimitations ( 18 ) of the loading opening ( 43 ). 
   
   
       5 . The working tool as claimed in one of  claims 1  to  3 , characterized in that the pivoting shaft ( 42 ) is mounted in mounting brackets on the upper delimiting wall ( 20 ) of the receiving space ( 24 ). 
   
   
       6 . The working tool as claimed in one of  claims 1  to  5 , characterized in that the pivoting shaft ( 42 ) has, as a rotary element, an internally mounted tube ( 44 ) or a rod which is mounted by means of its casing. 
   
   
       7 . The working tool as claimed in one of  claims 1  to  6 , characterized in that the connecting means ( 50 ) are arranged at connecting points which are distributed discretely or are continuous along the pivoting shaft ( 42 ). 
   
   
       8 . The working tool as claimed in one of  claims 1  to  7 , characterized in that the pivoting shaft ( 42 ) in particular has multi-sided or polygonal profiled elements as connecting means ( 50 ) for a rotationally fixed, positively locking connection to the auxiliary tool ( 14 ,  16 ,  17 ). 
   
   
       9 . The working tool as claimed in one of  claims 1  to  8 , characterized in that the connecting means ( 50 ) are designed for the auxiliary tool ( 14 ,  16 ,  17 ) to be suspended on, plugged onto and/or screwed onto the pivoting shaft ( 42 ). 
   
   
       10 . The working tool as claimed in one of  claims 1  to  9 , characterized in that the connecting means ( 50 ) comprise a laterally protruding plug-in spigot on the pivoting shaft ( 42 ) and a receiving shoe which is arranged on the auxiliary tool ( 14 ,  16 ,  17 ), and can be placed onto the plug-in spigot and can be fixed by means of a securing element. 
   
   
       11 . The working tool as claimed in one of  claims 1  to  10 , characterized in that the pivoting shaft ( 42 ) is composed linearly of a plurality of rotationally fixedly connected sections. 
   
   
       12 . The working tool as claimed in one of  claims 1  to  11 , characterized in that the pivoting drive ( 36 ) is preferably arranged eccentrically on an upper delimiting wall ( 20 ) of the receiving space ( 24 ). 
   
   
       13 . The working tool as claimed in one of  claims 1  to  12 , characterized in that the pivoting drive is formed by a hydraulic lifting cylinder ( 36 ) which is coupled to the pivoting shaft. 
   
   
       14 . The working tool as claimed in one of  claims 1  to  13 , characterized in that the optional auxiliary tool ( 14 ,  16 ,  17 ) is formed by at least one gripping finger ( 14 ) or a flap part ( 16 ), in particular a sludge flap or a sorting sieve. 
   
   
       15 . The working tool as claimed in one of  claims 1  to  14 , characterized in that the optional auxiliary tool ( 14 ,  16 ,  17 ) is formed by a cleaning tool which can be pivoted into the digging device ( 10 ) in order to clean the receiving space ( 24 ). 
   
   
       16 . The working tool as claimed in  claim 15 , characterized in that the cleaning device comprises two scrapers ( 76 ) which can be guided along so as to scrape the inside of the side walls ( 18 ) of the digging device ( 10 ), and have a curved cutting edge ( 78 ). 
   
   
       17 . The working tool as claimed in one of  claims 1  to  16 , characterized in that the coupling means ( 30 ,  32 ) provided for connecting the digging device ( 10 ) to the arm protrude freely from the pivoting shaft ( 42 ) on the digging device ( 10 ). 
   
   
       18 . The working tool as claimed in one of  claims 1  to  17 , characterized in that the upper delimiting wall ( 20 ) of the receiving space ( 24 ) is reinforced by a stiffening element ( 58 ).