Construction equipment having unified vibration absorber and rollover protection structure

Abstract

Construction equipment having unified vibration absorber and ROPS is provided, which can protect an operator by restricting the displacement of a cab through the ROPS when an excessive load is applied to the cab due to a rollover accident or the like of the equipment during traveling or working of the equipment. The construction equipment includes a lower driving structure; an upper swing structure including a body frame mounted on the lower driving structure to be swiveled and a bottom plate mounted on the body frame; a cap and an engine room mounted on the upper swing structure; a working device including a boom, an arm, and a bucket; a counter weight mounted on the rear of the upper swing structure; a vibration absorber mounted between the body frame and the bottom plate to elastically support the cab against the body frame; a load support cover put on the vibration absorber and fixed to a flange of the vibration absorber by a fixing device so that if overload is applied to the cab, the cab can be moved in a direction in which the load is transferred to the cab; and a fastening member closely fixing the cab, the bottom plate, the load support cover, and the vibration absorber in a body.

1 . Construction equipment having unified vibration absorber and ROPS (Rollover Protective Structure), comprising:
 a lower driving structure;   an upper swing structure including a body frame mounted on the lower driving structure to be swiveled and a bottom plate mounted on the body frame;   a cap and an engine room mounted on the upper swing structure;   a working device including a boom rotatably fixed to the upper swing structure to be driven by a boom cylinder, an arm connected to the boom to be driven by an arm cylinder, and a bucket connected to the arm to be driven by a bucket cylinder;   a counter weight mounted on the rear of the upper swing structure;   a vibration absorber mounted between the body frame and the bottom plate to elastically support the cab against the body frame;   a load support cover put on the vibration absorber and fixed to a flange of the vibration absorber by a fixing device so that if overload is applied to the cab, the cab can be moved in a direction in which the load is transferred to the cab; and   a fastening member closely fixing the cab, the bottom plate, the load support cover, and the vibration absorber in a body.   
     
     
         2 . The construction equipment according to  claim 1 , wherein the fixing device comprises:
 a fixing member fixing a flange of the load support cover to the flange of the vibration absorber; and   a load support stopper engaged with an outer side of the fixing member, having a lower end portion passing through a through-hole formed on a flange of the load support cover, being in close contact with an upper surface of the flange of the vibration absorber, and limiting a displacement that occurs on the cab due to overload being applied to the cab.   
     
     
         3 . The construction equipment according to  claim 2 , wherein an outer diameter of the load support stopper is formed to be smaller than an inner diameter of the through-hole formed on the flange of the load support stopper so that the load support cover is movable against the fixing device when a load is applied to the cab.