RU2291297C1 - Working tool of mining machine - Google Patents

Abstract

FIELD: mining industry, possible use in mining machines with cutting working tools (worms, crowns, drums), in particular in drilling combines and complexes for driving mines of rectangular cross-section.

SUBSTANCE: working tool contains frame, on which motor is held with cutting tool. Motor is made in form of two independent reducers with engines. Cutting tool is made in form of four separate drums. On output shaft of each reducer two drums are mounted. Each reducer is held on frame with possible transverse movement relatively to the latter.

EFFECT: high productiveness during work with hard rock, expanded area of possible use depending on width of mine being driven, possible destruction of rectangular face using simple plan, not requiring high combiner skills.

2 cl, 7 dwg

Description

The invention relates to the mining industry and can be used in mining machines with cutting executive bodies (screws, crowns, drums), and especially in roadheaders and complexes undergoing rectangular workings.

The executive body of the efficiency combine harvester is known (see the journal “Coal of Ukraine”, No. 2, 2003, title sheet), consisting of a frame inside which a gearbox with a drive is located, and two cutter crowns with a transverse horizontal axis of rotation mounted on the output shaft from different sides of the gearbox. This executive body has the ability to turn left-right and up-down using hydraulic cylinders. It allows you to go through workings of not only arched, but also rectangular sections.

However, the design of the analogue has a drawback when passing the workings of a rectangular section. The processing of the face by such an organ has a low productivity, since the incisor crowns have a small working width, and the combiner needs to make frequent and long movements of the organ over the entire working section, frequent idle hauls.

Closest to the proposed invention is the executive body of the tunneling machine JOY (see the brochure of the company "JOY", ed. 2001, bull. No. CM36-1M-1101), adopted for the prototype. It consists of a frame on which a drive is mounted, comprising an electric motor and a gearbox. A cutter drum with a transverse horizontal axis of rotation is mounted on the gearbox. The executive body can swing in a vertical plane. This body has a fixed width across the entire width of the output.

The disadvantage of such an organ is that, due to the wide working width, the number of incisors is increased, and this leads to a reduction in cutting force on the incisor. Therefore, mining with high productivity is possible only for coal and weak rocks. Stronger breeds require an increase in the power supply of the executive body, and this leads to the strengthening of all the bearing frames of the combine, and, as a result, to an increase in its dimensions and mass. In addition, a fixed working width of such an executive body allows passing only one specific width. If necessary, change the width of the output, it is necessary to change the executive body. All this significantly reduces the scope of mining machines with this design of the executive body.

The basis of the invention is the task: in the executive body of the mining machine, by changing its design, reduce the working width, which will increase the cutting force on the cutter and increase the productivity of the executive body when working on hard rocks, as well as provide adjustment for the width of the passable output, which will allow expand the scope of the executive body.

The problem is solved due to the fact that in the executive body containing the frame on which the drive with the cutter body is fixed, according to the invention, the drive is made in the form of two independent gearboxes, the cutter body is made in the form of four separate drums, while on the output shafts of each gearbox two drums are installed, and each gearbox is mounted on the frame with the possibility of lateral movement relative to the latter.

The possibility of transverse movement of the gearboxes can be realized by the fact that a transverse guide beam is rigidly fixed in the frame, holes are made in the lower part of the housing of each gearbox through which the beam is inserted, two hydraulic cylinders are placed in the frame, one ends connected to the frame, and the other to the bodies gearboxes.

This design allows you to reduce the total width of the cutter drums, which, while reducing the total number of cutters will increase the cutting force on the cutter, providing higher performance in hard rocks compared to the prototype. Due to the possibility of transverse movements of independent gearboxes, the width of the passable output can vary.

Figure 1 shows the Executive body in the development after notching (top view);

figure 2 is the same (after the transverse movement of the gears);

figure 3 - the initial position of the executive body after notching;

figure 4 - rise of the executive body;

figure 5 - transverse movement of the gears;

figure 6 - lowering of the executive body;

in Fig.7 - the return of the executive body to its original position.

The executive body consists of a frame 1, on which a drive is mounted, which is two independent gearboxes 4, 5 and a cutting tool in the form of four separate drums 6. Two drums are installed on the output shafts of each gearbox 4, 5 6. Each gearbox 4, 5 is mounted on the frame 1 with the possibility of lateral movement relative to the latter. To move the gearboxes in the frame 1, the transverse guide beam 3 is rigidly fixed, threaded through the holes made in the lower part of the housing of each gearbox 4, 5, in the frame 1 there are two hydraulic cylinders 2, one ends connected to the frame 1, and the other connected to the gearboxes 4 , 5.

The achievement of the technical result is as follows. The initial position of the executive body is presented in figure 3. When notching, the executive body is submitted to the face for the size of the ledge N (figure 1). Then make the rise of the body up to the roof (figure 4). After that, the transverse movement of gearboxes 4, 5 in different directions (Figs. 2 and 5) is necessary for the given working width. The movement of the gearboxes 4, 5 occurs with the help of hydraulic cylinders 2 along the transverse guide beam 3. In this position of the actuator, it is lowered to the soil, thereby destroying the ledges remaining after the rise (Fig.6). Then carry out the return of the executive body to its original position and the simultaneous cleaning of the soil.

Thus, the implementation of the drive in the form of two independent gearboxes with motors and the division of one incisor drum into four with a smaller working width allowed to reduce the number of incisors, thereby increasing the cutting force on the incisor at the same power ratio of the organ, and, as a result, destroy a stronger breed . And the presence of transverse movements of the gearboxes made it possible to adjust the organ along the width of the passable output.

Claims (2)

1. The executive body of the mining machine, containing a frame on which a drive with a cutter body is fixed, characterized in that the drive is made in the form of two independent gearboxes with motors, the cutter body is made in the form of four separate drums, while on the output shafts of each gearbox two drums, and each gearbox is mounted on the frame with the possibility of lateral movement relative to the latter. 2. The body according to claim 1, characterized in that a transverse guide beam is rigidly fixed in the frame, holes are made in the lower part of the housing of each gearbox through which the beam is inserted, two hydraulic cylinders are placed in the frame, one ends connected to the frame, and the other with gear housings.

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