SU1121362A1 - Trencher - Google Patents

Abstract

Trench excavator, inclusions base machine, guide frame, stick-arm and bucket with side walls and bottom, hinged at the bottom of the rod: handle, characterized by the fact that, with a narrow deep chain. trenching and improving unloading conditions; the side walls of the bucket are rigidly closed on the rod-handle, equipped with a spade-like knife, the blade of which is located below the side walls of the bucket. 9

Description

The invention relates to construction earthmoving machines and can be used in the construction of buried structures and counter-filtration walls, as well as for foundations of deep laying and large bearing capacity.

A trench excavator is known, including a base machine, a kaprow stand, a bucket, and a handle mounted by carriages with the possibility of vertical movement along the guides of the pile post 1.

The disadvantages of this excavator are the deviation of the sucker stick under the action of reactive forces during the digging process, especially at a considerable depth, and the poor efficiency of cutting the bucket into the dense soils under the mud solution.

The closest to the invention in technical essence and the achieved result is a trench excavator comprising a base machine, a guide frame, a stick-arm and a bucket with side walls and a bottom, hinged in the lower part of the stick-arm

The work of a known excavator is negatively affected by the presence of the so-called tray (scoop effect of the repeated increase in the digging action of the bucket as a result of the corking of the soil between the side walls of the bucket during its operation (with a small width and considerable height of the side walls). This disadvantage also occurs in others trench excavators, including hydraulic ones. The action of the soil plug is aggravated by the fact that the width of the chip is much greater than the width of the bucket cavity due to side walls and external gaps between the external surfaces of the walls and trench walls. Thus, during the excavation process, a larger width of the chip should be pressed into the smaller width of the bucket cavity. The performance of the excavator also reduces the presence of a bracket inside the coppta cavity.

The purpose of the invention is to increase the productivity of work in a narrow deep trench and to improve the discharge conditions.

The goal is achieved by the fact that in a trench excavator, including a base machine, a guide frame, a stick bar and a bucket with side walls and a bottom pivotally fixed in the lower part of the bar, the side walls of the bucket are rigidly fixed on the stick arm equipped with a lug knife, the blade is placed below the side walls of the bucket.

FIG. Figure 1 shows the proposed trench excavator with a bucket and a stick-arm in a trench during the digging process; in fig. 2 - bucket working elements; in fig. 3 shows a section A-A in FIG. 2 (a turning element of the bucket with side cutting edges).

The trench excavator consists of a base machine 1, a rod-handle 2, in the lower part of which the bottom 3 of the bucket, the spade-shaped knife A and the side walls 5 of the bucket are hinged, forming together the bucket and its cavity at the moment of the end of the digging cycle. The side walls of the bucket are rigidly fixed to the bottom of the stick-hilt, and the blade of the spade-shaped knife is located below the side walls of the bucket. A drive lever 6 is pivotally attached to the rear side of the bottom 3, the upper end of which is articulated with the movable block 7 of the polyspast 8 moving in the slots of the stick-arm 2, the fixed block 9 of which is fixed on the stick-arm 2. The pulley 8 with the hoisting rope stock 10, passing inside the arm 2, then through the hole in the rod-arm is connected to blocks 9 and 7 with fixing the free end to the axis of the block 9. The second unloading cable 11 of the base machine 1 freely passes through the eyelet 12, and its end is attached to the axis of the block 7. Fixi Handle 2 and bottom 3 are in operation by means of a guide frame 13 pivotally connected to the base machine 1 at point 14. In the lower position, the guide frame 13 is held by the rope 15 attached to the boom of the base machine 1. The bottom orientation 3 in the direction of trenching is provided by means of rollers 16 attached to the frame 13 and guide rails 17 along the handle 2. The rigidity of the bucket is ensured by the presence of lateral pe3

ber and application of pressure force near its cutting edge.

The proposed trench excavator can be equipped with a telescopic handle, which makes it possible to significantly increase the depth of trenching.

The work of a trench excavator is as follows.

On the unloading cable 11, the rod 2 is lowered to the bottom and stops mainly by the reactive force of cutting the spade-shaped knife A and partially by the resistance of the cutting edge of the bottom 3. Then, by tensioning the lifting cable 10 through the pulley 8, the lever 6 makes a working turn of the bottom 3 with its cutting into the ground slap

In the final position of the working stroke of the bottom of the bucket shavings soil

62 4

accumulates in the space bounded by the back wall of the bucket and the side walls. Further tensioning of the hoisting rope 10 lifts the stick-arm with the bucket on

surface. As a result of the bucket stop in the guide frame 13, it is lifted with rotation at point 14 and the attachment is fed into

unloading zone. By tensioning the unloading rope 11 with the simultaneous release of the hoisting rope 10, the bottom 3 is turned and the soil is loaded into the dump. Then work

The excavator cycle repeats.

The application of the invention ensures the improvement of the productivity of work by efficiently plunging into the ground, improving the discharge conditions

and reduce the size of the working body.

five

3

FIG

A ±

FIG.

Claims (1)

Trench excavator, including a base machine, a guide frame, a handle bar and a bucket with side walls and a bottom pivotally mounted in the lower part of the handle, characterized in that, with a chain for increasing productivity in a narrow deep trench and improving unloading conditions, the side walls of the bucket rigidly fixed to the rod-handle, equipped with a shovel-shaped knife, the blade of which is located below the side walls of the bucket.