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.

Claims

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a structural diagram of a loader working device according to the present disclosure.

[0016] FIG. 2 is a side view of the loader working device according to the present disclosure.

[0017] FIG. 3 is a sectional view of the loader working device according to the present disclosure.

DETAILED DESCRIPTION

[0018] The detailed embodiment is described with reference to the drawings.

[0019] As shown in FIG. 1 and FIG. 2, a loader working device in the embodiment is a loader bucket working device, which comprises an accessory bucket, a bucket lifting mechanism connected between the bucket and a front frame of the loader, and a bucket overturning mechanism, wherein the bucket lifting mechanism is symmetrical left and right about a vertical central plane, and comprises a movable arm 2, a movable arm oil cylinder 4, a front link rod 6 and a rear link rod 5 on left and right sides; and the two movable arms 2 are fixedly connected by a movable arm beam 9. A front end of the front frame 3 is provided with a support 31. One end of the movable arm oil cylinder 4 is hinged to a point A on the movable arm 2, and the other end is hinged to a point B on the front frame 3; a front end of the front link rod 6 is hinged to a point C on the support 31, the movable arm 2 is provided with a front link rod hinge arm 21 extending downwardly, a rear end of the front link rod 6 is hinged to a lower end of the front link rod hinge arm 21, and the hinge point is a point D. An upper end of the rear link rod 5 is hinged to a point E at the rear end of the movable arm, and a lower end is hinged to a point F on the front frame. A convex quadrilateral is formed by connecting lines between projection points of the hinge points A, E, F and D on a central plane; the connecting lines between projection points of the hinge points C, E and D on the central plane form a triangle, a projection point of the point D is located below the connecting line of the projection points of the point C and the point E, and the hinge point D is located between the movable arm oil cylinder 4 and the support 31 of the front frame at the front end.

[0020] As shown in FIG. 3, a bucket overturning mechanism comprises a pulling rod 11, a rocker arm 10, an overturning oil cylinder 8, a three-hinge point holder 7 and a self-leveling link rod 12; the rear link rods at left and right sides are connected into an H shape by a middle beam, a middle portion of the rocker arm 10 is hinged to the movable arm beam 9, an upper end of the rocker arm 10 is hinged to a rear end of the pulling rod 11, a front end of the pulling rod 11 is hinged to the bucket 1, a lower end of the rocker arm 10 is hinged to a front end of the overturning oil cylinder 8, a rear end of the overturning oil cylinder 8 is hinged to a G hinge point of the three-hinge point holder 7, an H hinge point of the three-hinge point holder 7 is hinged to the middle beam, an I hinge point of the three-hinge point holder 7 is hinged to an upper end of the self-leveling link rod 12, a lower end of the self-leveling link rod 12 is hinged to an L hinge point on the front frame 3, the G hinge point is located above the I hinge point, and the H hinge point is located at a rear side of a connecting line between the G hinge point and the I hinge point. Connecting lines of the G hinge point, the H hinge point and the I hinge point of the three-hinge point holder form an equilateral triangle. Connecting lines between projection points of the I hinge point, the H hinge point, the F hinge point and the L hinge point on a central plane form a parallelogram. The self-leveling link rod is L-shaped, and an upper section thereof is bent backwardly, thus avoiding interference between the self-leveling link rod and the middle beam connecting the two rear link rods. The overturning oil cylinder is located below the movable arm beam.

[0021] In the present disclosure, the bucket lifting mechanism is formed by superposing two four-link rods to realize vertical lifting, and a first four-link rod mechanism consisting of the movable arm 2, the rear link rod 5, the front frame 3 and the movable arm oil cylinder 4 realizes a lifting movement of the movable arm 2; and a second four-link rod consisting of the movable arm 2, the front link rod 6, the front frame 3 and the movable arm oil cylinder 4 realizes horizontal restraint in a lifting process, and controls a load moment arm to swing in a small range, so that a distance between the bucket 1 and a front wheel is basically kept unchanged in the lifting process, so as to realize vertical lifting.

[0022] A forward Z-shaped six-link rod consisting of the bucket 1, the pulling rod 11, the rocker arm 10, the movable arm 2, the overturning oil cylinder 8 and the three-hinge point holder 7 at the front end of the accessory overturning mechanism realizes an overturning action, and controls an overturning angle of the bucket and a digging force of the bucket. The overturning oil cylinder 8 is mounted at the lower end of the rocker arm 10, and the pulling rod 11 is mounted at the upper end of the rocker arm 10, thus reducing a mounting height of the overturning oil cylinder 8 and improving a front visual field. Meanwhile, an overturning movement direction of the bucket is consistent with a movement direction of the rocker arm 10, which is beneficial to increasing the overturning angle of the bucket. A four-link rod mechanism consisting of the three-hinge point holder 7, the self-leveling link rod 12, the rear link rod 5 and the front frame 3 at the rear end of the bucket overturning mechanism realizes automatic leveling in an overturning process, which solves the problem of asynchronous angle turnover of the bucket lifting mechanism and the bucket overturning mechanism, and the four-link rod structure at the rear end controls the change of the bucket overturning angle in the lifting process of the bucket lifting mechanism, so that the change of the bucket angle relative to the ground is smaller. The three-hinge point holder 7 skillfully solves the connection problem of the overturning oil cylinder 8, the rear link rod 5 and the self-leveling link rod 12, and reduces the assembly difficulty.