Patent ID: 8960778
Filing Date: 2015-02-24
Classification: B62D,E02F

Abstract:
1. A revolving frame of a construction machine comprising: a flat-plate shaped bottom plate; left and right vertical plates extending in front and rear directions, installed upright on said bottom plate and disposed with an interval therebetween; and a front plate arranged on a front side of said bottom plate and connecting said left and right vertical plates to each other across the interval; a left reinforcing member reinforces said left vertical plate and said front plate against a load from a working mechanism and the left reinforcing member is fixed at a left corner portion where said left vertical plate and said front plate cross each other, where said left reinforcing member defines a closed space at said left corner portion between said left vertical plate and said front plate, and where an upper area and a lower area of said left reinforcing member are joined to said corner portion between said left vertical plate and said front plate, respectively, and an intermediate area, in a vertical direction, of said left reinforcing member is joined to a rear surface of said front plate and said left vertical plate; and a right reinforcing member reinforces said right vertical plate and said front plate against the load from said working mechanism and the right reinforcing member is fixed at a right corner portion where said right vertical plate and said front plate cross each other, wherein said right reinforcing member defines a closed space at said right corner portion between said right vertical plate and said front plate, and wherein an upper area and a lower area of said right reinforcing member are joined to said corner portion between said right vertical plate and said front plate, respectively, and an intermediate area, in the vertical direction, of said right reinforcing member is joined to the rear surface of said front plate and said right vertical plate.