PL170596B1 - Operating arrangement of a hydraulic single-bucket excavator - Google Patents

Abstract

Working system of a hydraulic single-bucket excavator, consisting of a spoon, two-segment boom, three hydraulic lifts and an additional one member, characterized in that the boom folds consists of two three-node segments (112) articulated with each other, one of which is three-node the segment (1) is rigidly connected to the bucket (3) excavators, this three-node segment (1) the second the node is articulated with one node the four-node member (4) and the third node is articulated connected to one node of the closing flap (5) the excavator bucket (3) and the second three-node segment (2) the second node is articulated to the frame (6) the excavator, and the third node is articulated one end of the hydraulic cylinder (7), which the other end is articulated to the frame (6) excavator, while the four-node unit (4) is the second node articulated connected at one end of the two-node member (8), the other end of which is articulated to the excavator frame (6), the third node is articulated to one end of the other the hydraulic cylinder (9), the other end of which it is articulated to the excavator frame (5) and to the fourth the knot is articulated at one end a third hydraulic cylinder (10) of which the other end is articulated to the second node flap (5) closing the excavator bucket (3)

Description

The subject of the invention is a working system of a hydraulic single-bucket excavator with a multi-stage movement when filling and lifting the cutting vessel.

Commonly known working systems of hydraulic single-bucket excavators consist of a two-segment boom and three hydraulic cylinders, both segments being four-bucket segments. One four-node segment with one node is articulated with the cutting vessel, and the other four-node segment with one node is articulated with the excavator frame. The two four-node segments are directly articulated with their second nodes and indirectly articulated with their third nodes via one hydraulic cylinder. One four-node segment with the fourth node is articulated to the cutting vessel by means of a second hydraulic cylinder. The second, four-node segment with the fourth node is articulated to the excavator frame via a third hydraulic cylinder.

The disadvantage of the previously known hydraulic working systems of single-bucket excavators is that they do not ensure parallelogram guidance of the cutting vessel while it is being lifted with the excavated material, as well as easy discharge of the excavated material from the cutting container in any position. An additional disadvantage is the occurrence of significant static and dynamic forces in joints and members during the operation of the hydraulic system of a single-bucket excavator.

The essence of the invention consists in the fact that the boom consists of two three-node segments articulated with each other, one of the three-node segment is rigidly connected to the excavator bucket, while this three-node segment is articulated with one node of the four-node member, and the third node with the third node. is articulated with one node of the flap closing the excavator bucket, while the second three-node segment is articulated with the second node with the second node, and the third node is articulated with one end of the hydraulic cylinder, the other end of which is articulated with the excavator's frame, and the four-node with the other the node is articulated to one end of a two-node member, the other end of which is articulated

170 596 connected to the excavator frame, the third node is articulated to one end of the second hydraulic cylinder, the other end of which is articulated to the excavator frame, and the fourth node is articulated to one end of the third hydraulic cylinder, the other end of which is articulated to the other the node of the flap closing the excavator bucket.

The advantage of the working system of the hydraulic single-bucket excavator according to the invention is the parallelogram guidance of the cutting vessel while it is being lifted with the excavated material, as well as the easy discharge of the excavated material from the cutting vessel in any of its positions. An additional advantage is the reduction of the static and dynamic overload in joints and elements of the excavator's hydraulic system by 30%.

The subject of the invention is presented on the example of the embodiment and in the drawing which shows the kinematic diagram of the working system of the hydraulic single-bucket excavator.

The working system of a hydraulic single bucket excavator according to the invention is structured as follows. The boom of this excavator consists of two three-node segments 1 and 2 articulated with each other, one of which three-node segment 1 is rigidly connected to the bucket 3 of the excavator, the three-node segment 1 being articulated with one node of the four-node segment 4 by the second node, and the third node is articulated to one node of the flap 5 closing the excavator bucket 3, while the second three-node segment 2 is articulated by the second node to the excavator frame 6, and the third node is articulated to one end of the hydraulic cylinder 7, the other end of which is articulated to frame 6 excavator. The four-node member 4 is articulated by the second node to one end of the two-node member 8, the other end of which is articulated to the frame 6 of the excavator. The four-link member 4 is articulated by a third knot to one end of the second hydraulic cylinder 9, the other end of which is articulated to the frame 6 of the excavator. The four-node member 4 by the fourth node is articulated to one end of the third hydraulic cylinder 10, the other end of which is articulated to the second node of the flap 5 closing the excavator bucket 3.

The operation of the hydraulic working system of a single bucket excavator according to the invention is as follows. In the scooping phase, the bucket 3 is in the lowest position and the closing flap 5 is in the closed position. Under the influence of the hydraulic actuator 7, relative movements of the members of the working system take place, as a result of which the three-node segment 1 with the rigidly mounted bucket 3 sinks into the material being cut and simultaneously rotates in relation to the frame 6 of the excavator and assumes the closed position. In the lifting phase, the hydraulic cylinder 7 does not work, and as a result of the action of the hydraulic cylinder 9, relative movements of the working system members take place, as a result of which the three-node segment 1 with the excavator bucket 3 and the excavated material contained in it occupies the upper extreme position. In the discharge phase, under the influence of the hydraulic cylinder 10, the closing flap 5 opens and the spoil is discharged. Then, under the influence of the hydraulic cylinder 10, the bucket 3 is closed in the other direction with the flap 5. Due to the action of the hydraulic cylinder 9, relative movement of the members of the working system takes place and the three-node segment 1 with the bucket 3 of the excavator rigidly attached to it occupies the lower extreme position and the working system of the excavator is prepared to dig.

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Claims (1)

Patent claim The working system of a hydraulic single-bucket excavator, consisting of a bucket, a two-segment boom, three hydraulic jacks and an additional member, characterized in that the boom consists of two three-node segments (1 and 2) connected articulated with each other, of which one three-node segment (1) it is rigidly connected to the excavator bucket (3), the three-node segment (1) being articulated with the second node with one node of the four-node member (4), and the third node being articulated with one node of the flap (5) closing the bucket (3) excavator, while the second three-node segment (2) is articulated with the excavator frame (6) by the second node, and the third node is articulated with one end of the hydraulic cylinder (7), the other end of which is articulated with the excavator frame (6), and the four-node link (4) with the second node is articulated to one end of the two-node link (8), the other end of which is articulated to the frame (6) ) of the excavator, the third node is articulated to one end of the second hydraulic cylinder (9), the other end of which is articulated to the excavator frame (5), and the fourth node is articulated to one end of the third hydraulic cylinder (10), the other end of which is it is articulated with the second node of the flap (5) closing the excavator bucket (3).