Support Arm for a Work Machine

Abstract

A support arm for a work machine is to be created whose design follows the component stresses to be expected to a high degree, which has the lowest possible intrinsic mass, and which can be manufactured with a minimum of effort. This is accomplished in that the support arm consists of at least one wall that has at least one plate-shaped element, which has at least one planar cut-out adapted to the component stresses expected, whereby at least one cut-out is closed off by a thin-walled cover element opposite the plate-shaped element.

1 . Support arm on a work machine comprising:
 at least one wall having at least one plate-shaped element, whereby the at least one plate-shaped element has at least one planar cut-out adapted according to the stresses expected to be placed on the component;   whereby at least one cut-out is closed off with a thin covering element opposite the plate-shaped element; and   the at least one covering element is fastened, in particular welded, circumferentially around the edge of the cut-out.   
     
     
         2 . Support arm according to  claim 1  characterized in that the at least one wall consists of a single-piece plate-shaped element. 
     
     
         3 . Support arm according to  claim 1  wherein, the at least one plate-shaped element has a uniform wall thickness. 
     
     
         4 . Support arm according to  claim 1  wherein the at least one plate-shaped element has several cut-outs. 
     
     
         5 . Support arm according to  claim 1  wherein the at least one covering element is located on the inside or outside of the plate-shaped wall. 
     
     
         6 . Support arm according to  claim 1  wherein the at least one covering element is located inside the cut-out of the plate-shaped wall. 
     
     
         7 . Support arm according to  claim 1  wherein the support arm has a box-shaped cross-section consisting of several walls, whereby at least one wall has a plate-shaped element. 
     
     
         8 . Support arm according to  claim 7  wherein the support arm is part of the working equipment of a work machine that serves to move and bear a work tool. 
     
     
         9 . Support arm according to  claim 8  wherein the support arm is a jib or the boom of an excavator, whereby the box-shaped cross-section of the support arm has an upper flange, one lower flange and side walls and in which at least one flange and/or at least one side wall has a plate-shaped element. 
     
     
         10 . Support arm according to  claim 9  wherein the contour of the side walls along its length is also dimensioned appropriately for the stresses expected to be placed on the component.