SU987037A1 - Power shovel working equipment - Google Patents

Description

(54) WORKING EQUIPMENT OF EXCAVATOR-SHOVELS

one

The invention relates to earthmoving machines, in particular to the working equipment of a shovel excavator.

The working equipment of a shovel excavator is known, including a boom, a handle, a rack pressure mechanism and a saddle bearing. Top and side one-piece sliders are rigidly attached to the saddle bearing housing, which guide the handle inside the saddle bearing and gear wheel relative to the pressure mechanism, and also transfer loads from the handle beam to the boom through the bearing housing. Between the sliders and the seat of the saddle bearing there are flat gaskets, with the help of which they regulate the gaps between the handle beam and the saddle bearing 1.

However, rotation and misalignment of the handle in the saddle bearing during the operation of the excavator result in uneven wedge-shaped wear of the sliders, as a result of which it is not possible to maintain optimal gaps between the handle beam and the sliders with gaskets.

It is also known the working equipment of the excavator-shovel, including shooting.

the handle, the rack pressure mechanism and the saddle bearing with side and top cassettes made in the form of sliders with a spherical bearing surface and spring-loaded centering pads 2.

Such an embodiment of the sliders ensures their self-installation along the arm beams, and at the same time, more uniform wear of their working surface, which contributes to an increase in the durability of the sliders and arm beams.

ten

Due to the fact that the wear of the sliders occurs evenly throughout their area, the need to replace the sliders and adjust them by installing shims occurs less frequently than with rigid fixing of 15 sliders, but nevertheless such a need exists.

In addition, the slide blocks must be installed with a clearance relative to the arm beam, since the sliding surfaces of the beam cannot be performed perfectly

Claims (2)

20 are flat and parallel, which in turn leads to an increase in drive dynamics and premature wear of the beam and pressure mechanism. In the process of work, the gaps gradually increase until the moment when the sliders are adjusted by installing the gaskets. The purpose of the invention is to increase the durability of the working equipment and to improve its operating conditions. The goal is achieved by the fact that in the working equipment of a shovel excavator, including a boom, a handle, a rack pressure mechanism and a saddle bearing with side and upper cassettes made in the form of sliders with a spherical bearing surface and spring-loaded centering pads, the saddle bearing has movably mounted glasses with slats, in which spring-mounted centering slit-shaped liners are movably mounted, installed with the possibility of placement in the slits of the slats. The saddle bearing is equipped with a self-braking spring-loaded wedge-mounted wedge that is designed to interact with the glasses. FIG. 1 shows the working equipment, side view; in fig. 2 - saddle support, side view; in fig. 3 shows section A-A in FIG. 2. The working equipment includes the boom 1, the bucket 2, the handle 3 with the toothed rack 5 welded to its beam 4, the pressure mechanism 6 with the creamer gear 7. On the shaft 8 there is a saddle bearing 9 in its pockets which are movably fitted with glasses 10. In each A cartridge 10 is provided with a cassette consisting of a slider 11 with an anti-friction lining 12 attached to a centering lining 13. The lining 13 has an elongated cylindrical shank with which it slides in the glass 10. To the end of the glass 10 there are attached slats 14 that are slotted into the grooves 15 lining and 13. Between the lining and the bottom of the cup a spring 16 is placed, constantly pressing the cassette toward the handle 3. Between the cup and the wall of the saddle liner body there is a wedge 17 loaded with a spring 18. The wedge is self-braking, i.e. with a small inclination angle . The device works as follows. In the process of digging and loading the rock, the arm 3 performs a reciprocating movement in the saddle sub-holder 9. At the same time, the slide blocks 11 with their anti-friction linings 12 are pressed against the walls of the handle 3. The lateral rotation of the handle under the action of inertial forces is limited by planks 14, which are pressed against the walls 9 grooves 15 of the lining 13. As the anti-friction lining is worn, the cassette moves to the side of the handle until the centering lining 13 rests against the strips 14 of the second wall of the groove. At the same time, the spring 16 ceases to press through the bottom of the glass onto the wedge 17, and the latter moves under the action of its own weight and the spring 18 downwards, while moving the glass 10 towards the handle. This leads to the restoration of the gaps between the slats 14 and the walls of the grooves 15 in the lining 13. The process will be repeated until the anti-friction lining 12 of the slider is completely worn. The use of the invention automatically adjusts the gaps between the slides pressed to the handle and the supporting surface, and together with thus eliminating excessive distortions of the handle with respect to the pressure mechanism. The elastic pressing of the sliders to the handle reduces the dynamic loads in the working equipment caused by the movement of the handle by the size of the gaps, and also eliminates the periodic adjustment of the gaps in the saddle sub-tool during operation and increases the service life of the arm beams, rails and wheel rims. Claims of the working equipment of a shovel excavator, including a handle, a slatted pressure mechanism and a saddle bearing with side and top cassettes made in the form of sliders with a spherical bearing surface and spring-loaded centering pads, characterized in that in order to increase the durability of the working equipment and improve the conditions of its operation, the saddle bearing has movably mounted glasses with slats in which spring-loaded centering mounted with slotted mounts are mounted lining installed with the possibility of placing in the grooves of the slats, while the saddle bearing is equipped with self-braking G1-spring-loaded wedges installed with a special interaction with the glasses. Sources of information taken into account during the examination 1.Satovsky B.I. and others. Modern mining excavators. M., “Nedra, 1971, p. 54, fig. 31. 2. USSR author's certificate number 644914, cl. E 02 F 3/30, 1974 (prototype).