SU1763587A1 - Working equipment of hydraulic excavator - Google Patents

Description

one

(21) 4875771/03 (22) 10.22.90 (46) 09.23.92. Bul Ns 35 (71) Dnipropetrovsk Civil Engineering Institute (72) L. A. Khmara, S. V. Shatov and K. Ts. Glavatsky

(56) USSR inventor's certificate No. 840242, M.Kl.5 E 02 F 3/28, 1981.

(54) WORKING EQUIPMENT HYDRAULIC EXCAVATOR

(57) Use: excavation work, in particular in the development of strong and frozen soils. SUMMARY OF THE INVENTION: The working equipment of a hydraulic excavator comprises a handle,

a bucket connected to the arm with brackets, loosening the working body, hydraulic cylinders of the bucket rotation, the lower part of the handle is made U-shaped, attached to the rear parts of the brackets on their outer sides. The hydraulic cylinders are attached to the front parts of the bucket brackets. The axles of the hydraulic cylinders are offset in height relative to each other. The lugs for fixing the hydraulic cylinders to the handle are located on the inner upper side of the U-shaped part of the handle. The loosening working body is mounted on the back wall of the bucket on an additional bracket 6 of them.

The invention relates to earthmoving machinery, in particular to the working equipment of a hydraulic excavator,

The known design of the working equipment of a hydraulic excavator, which is designed to perform excavation work, including a hydraulic-controlled boom, hinged on the turntable of the base machine, pivotally connected to the boom, a handle received from the control hydraulic cylinder, the body of which is hingedly mounted in the bracket of the boom 1 ,

At the free end of the arm, a bucket is mounted by means of an arm, receiving a drive from a bucket control hydraulic cylinder mounted on the arm, the rod of which is pivotally connected to the double-arm lever, one end of which is pivotally mounted on the arm, and the other is connected to the bucket bracket through the other.

The disadvantages of this design are: the limitations of its technological capabilities due to the small angle of rotation of the bucket between its extreme positions; low productivity of excavation work in the development of solid soils and the impossibility of the development of frozen soils.

The closest in technical essence to the present invention is a working equipment of a hydraulic excavator, including a bucket and a loosening rack connected to the handle with a common articulated axis, and a hydraulic cylinder of bucket rotation, and the working equipment is equipped with variable fixation elements of the rack relative to the arm and the bucket, respectively made in the form of mounting lugs with finger locks fixed to the handles, bucket, and the front and rear sides of the rack.

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The disadvantages of this device are low productivity of excavation work in the development of strong and frozen soils, due to the need for installation and dismantling of the loosening rack on the bucket; shallow depth of soil loosening; the inability to use replaceable loosening pillars with offset loosening teeth in both the longitudinal and transverse planes.

The purpose of the invention is to expand the technological capabilities and increase the productivity of the working equipment of a hydraulic excavator in the development of strong and frozen soils.

The goal is achieved by the fact that the lower part of the arm is made U-shaped and is attached to the rear parts of the bucket brackets on their outer sides, the bucket is equipped with a second hydraulic cylinder of its rotation, the hydraulic cylinder rods are attached to the front parts of the bucket brackets and the axis of the rod mounting are shifted height relative to each other, and the lugs of the hydraulic cylinders for turning the bucket to the arm are attached to the inner upper side of the U-shaped part of the arm, while the cylinders of the hydraulic cylinders are located between the inner side st ronami U-shaped handgrip part and lugs, and loosening actuator mounted on the rear wall of the bucket by means of an additional bracket.

Fig, 1 shows the working equipment of a hydraulic excavator, general view; in fig. 2 - a handle assembled with a working body and hydraulic control cylinders; in fig. 3 is a view along arrow A in FIG. 2; Fig, 4 - the location of the working body when filled with a bucket; in fig. 5 - option unloading bucket; in fig. 6 - the work of the working body in the mode of loosening the developed environment.

The working equipment of a hydraulic excavator includes a handle 1 pivotally connected to the boom 2 of the base machine 3. In the upper part of the hand 1 the control hydraulic cylinder rod 4 is hingedly mounted, the body of which is fixed in the eye 5 of the boom 2 by means of a finger 6. The lower part of the hand These 1 are made in the form of a U-shaped design with lugs 7 for fastening the housings of the hydraulic cylinders of the control 8 by the bucket 9 and the mounting-dismounting holes 10 of the brackets 11 and 12 of the bucket 9 by means of pins 13 and the hole 14 made in the rear part of the brackets 11 and 1 2 buckets 9. In the front part of the brackets 11 and 12, by means of pins 15 are fixed the rods of the hydraulic cylinders 8,

the fingers are located in the mounting holes 16 and 17, and the latter are offset in height relative to each other. On the back of the bucket 9 brackets are located

18, for mounting the replaceable loosening member 19 by means of fingers 20. The device operates as follows.

When extending the rods of the hydraulic cylinders 8, the bucket 9 takes up its original position before digging the soil. When the rods of the hydraulic cylinders 8 are pulled in, the bucket 9 is filled with the developed medium.

To unload the bucket 9 in the traditional way, the rods of the hydraulic cylinders 8 are again advanced. In the case of unloading the bucket 9 in the position shown in FIG. 5, both rods of the hydraulic cylinders 8 are retracted to failure.

At the same time, due to the misalignment of the holes 16 and 17 for fastening the rods, one of them is retracted to failure before and transferred to the floating position. The second rod continues to pull in and transfers the hinge.

mount the rod of the first hydraulic cylinder 8 through the upper dead center. It is then transferred to the floating position, and the rod of the first hydraulic cylinder 8. starts to move out and moves the hinge of the rod of the second

the hydraulic cylinder 8 through the upper dead point, after which both the rod work on the nomination. The return of the bucket 9 to its original position is performed in the reverse order. If it is necessary to perform loosening works, the working body takes the position shown in FIG. 6

Claims (1)

Claims of the invention an excavator, including a arm, a bucket connected to the arm by means of brackets installed symmetrically across the width of the bucket, connected to the arm by means of an eye, a bucket turn cylinder, loosening the working body, characterized in that in order to expand its technological capabilities and increase productivity when the development of strong and frozen soils, the lower part of the arm is made U-shaped and attached to the rear parts of the bucket brackets on their outer sides, the bucket is provided with a second hydraulic cylinder of its rotation, the rods of the hydraulic cylinders are attached to the front parts of the bucket brackets, and the axis of attachment of the rods are displaced in height relative to each other, the lugs of the mounting of the hydraulic cylinders for turning the bucket to the handle are attached to the inner upper side of the U-shaped part of the handle; hydraulic cylinder bodies are located between the inner lateral sides of the U-shaped part of the arm and the eyelets, and /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// / /// // Y fe / Yu P Loosening the working body is mounted on the rear wall of the bucket through an additional bracket. 2 G - u -4 4roo LD CO CO f9o C5 to e 0 s P 9 P Y Figs / h f-co Yu with D rs .to