Loader Working Device

Abstract

The disclosure relates to a loader working device for solving the problem of arranging the parts used in a vertical lifting mechanism of an existing loader. The loader working device comprises an accessory, an accessory overturning mechanism, and an accessory lifting mechanism including a movable arm, a movable arm oil cylinder, a front link rod and a rear link rod. The accessory lifting mechanism does not cause the accessory to interfere with a rocker arm and a front axle package of the loader working device. A connecting and mounting point of the movable arm and the accessory can be moved backwardly, thus improving a digging force and a tilting load at a low position of the loader working device.

1 . A loader working device, comprising:
 a front frame, wherein a front end of the front frame is provided with a support;   an accessory;   an accessory lifting mechanism connected between the accessory and the front frame, wherein the accessory lifting mechanism is symmetrical left and right about a central plane, and wherein the accessory lifting mechanism comprises:
 a movable arm on each of a left side and a right side of the accessory lifting mechanism, wherein a movable arm beam is fixedly connected between the movable arms; and 
 a movable arm oil cylinder on each of the left side and the right side of the accessory lifting mechanism, wherein one end of the movable arm oil cylinder is hinged to a point A on one of the movable arms, and wherein another end of the movable arm oil cylinder is hinged to a point B on the front frame; 
   an accessory overturning mechanism connected between the accessory and the front frame;   a front link rod, wherein a front end of the front link rod is hinged to a point C on the support, and wherein a rear end of the front link rod is hinged to a point D on one of the movable arms; and   a rear link rod, wherein an upper end of the rear link rod is hinged to a point E at the rear end of one of the movable arms, and wherein a lower end of the rear link rod is hinged to a point F on the front frame;   wherein:   a convex quadrilateral is formed by connecting lines between projection points of the points A, E, F, and D on the central plane;   the connecting lines between projection points of the points C, E, and D on the central plane form a triangle; and   a projection point of the point D is located below a connecting line of the projection points of the point C and the point E.   
     
     
         2 . The loader working device according to  claim 1 , wherein the movable arm is provided with a front link rod hinge arm extending downwardly, wherein the rear end of the front link rod is hinged to a lower end of the front link rod hinge arm, and wherein the front link rod hinge arm is located between the movable arm oil cylinder and the support at the front end of the front frame. 
     
     
         3 . The loader working device according to  claim 1 , wherein:
 the accessory overturning mechanism comprises a pulling rod, a rocker arm, an overturning oil cylinder, a three-hinge point holder, and a self-leveling link rod;   rear link rods at the left side and the right side are connected into an H shape by a middle beam;   a middle portion of the rocker arm is hinged to the movable arm beam;   an upper end of the rocker arm is hinged to a rear end of the pulling rod;   a front end of the pulling rod is hinged to the accessory;   a lower end of the rocker arm is hinged to a front end of the overturning oil cylinder;   a rear end of the overturning oil cylinder is hinged to a point G of the three-hinge point holder;   a point H of the three-hinge point holder is hinged to the middle beam;   a point I of the three-hinge point holder is hinged to an upper end of the self-leveling link rod;   a lower end of the self-leveling link rod is hinged to a point L on the front frame;   the point G is located above the point I; and   the point H is located at a rear side of a connecting line between the point G and the point I.   
     
     
         4 . The loader working device according to  claim 2 , wherein:
 the accessory overturning mechanism comprises a pulling rod, a rocker arm, an overturning oil cylinder, a three-hinge point holder and a self-leveling link rod;   rear link rods at the left side and the right side are connected into an H shape by a middle beam;   a middle portion of the rocker arm is hinged to the movable arm beam;   an upper end of the rocker arm is hinged to a rear end of the pulling rod;   a front end of the pulling rod is hinged to the accessory;   a lower end of the rocker arm is hinged to a front end of the overturning oil cylinder;   a rear end of the overturning oil cylinder is hinged to a point G of the three-hinge point holder;   a point H of the three-hinge point holder is hinged to the middle beam;   a point I of the three-hinge point holder is hinged to an upper end of the self-leveling link rod;   a lower end of the self-leveling link rod is hinged to a point L on the front frame;   the point G is located above the point I; and   the point H is located at a rear side of a connecting line between the point G and the point I.   
     
     
         5 . The loader working device according to  claim 3 , wherein connecting lines of the point G, the point H, and the point I of the three-hinge point holder form an equilateral triangle. 
     
     
         6 . The loader working device according to  claim 3 , wherein connecting lines between projection points of the point I, the point H, the point F, and the point L on the central plane form a parallelogram. 
     
     
         7 . The loader working device according to  claim 5 , wherein the self-leveling link rod is L-shaped, and wherein an upper section thereof is bent backwardly. 
     
     
         8 . The loader working device according to  claim 3 , wherein the overturning oil cylinder is located below the movable arm beam.