SU1177471A1 - Percussive mechanism for mine cutter-loaders - Google Patents

Description

The invention relates to the mining industry, namely to the percussion mechanisms, and can be used in the working bodies of percussion combines. five

The purpose of the invention is to reduce the weight and size of the device.

FIG. 1 shows the proposed device in the platoon position; in fig. 2 - the same at the moment of impact. YU

The percussion mechanism includes a body stationary cylinder 2 with a brisk piston 3, a bar with tool 4, a movable cylinder 5, a floating piston 6, a two-link articulated mechanism with snaps 15 and 7 and roller 9, a cam 10, a floating piston 6 mounted between fixed cylinder 2 and movable cylinder 5.

Between the walls of cylinders 2 and 5 20

and the striker piston 3 there are cavities A,

B and C. The closed cavity A is filled with gas, and the interconnected and isolated from the external environment cavity B C filled with liquid in 25 a certain volume, and the sectional area C is larger than the cross-sectional area of the cavity 6.

The device works as follows. thirty

When turning the cam 10 in the direction of the arrow, the cam protrusion moves the roller 9 upwards (FIG. 1), straightening the levers 7 and 8, which are hinged to each other. 8 single-lever ₃₅ through the hinge end it is attached to the housing 1, the lever 7 - the movable cylinder 5, levers, straightening, moves the movable cylinder 5 to the left. The angle between the levers does not exceed

71 2

180 °, which eliminates the transition of the roller 9 through the dead position up.

When moving the rolling cylinder 5, the fluid from the cavity C under pressure flows into the cavity B through the holes in the stationary cylinder and causes the firing piston 3 to move to the right and compress the gas of cavity A, creating a certain final pressure, i.e. The process of cocking the percussion mechanism.

After the cam 10 passes its upper position, the roller 9 is released from communication with it. The gas in cavity 1 expands and moves the piston collars 3 to the left. As it moves, the latter pushes the fluid out of the cavity & into the cavity C, which, in turn, causes the moving cylinder 5 to move to the right. The roller 9 goes down, the angle between the levers 7 and 8 decreases. Piston-striker 3 strikes the rod with the tool 4 (Fig. 2). If the tool cannot penetrate into the array by the stroke of the piston-striker and the movable cylinder tends to its rightmost position, under the action of atmospheric pressure, the floating piston 6 moves to the right, thereby maintaining non-discontinuity of the fluid flow. With further cam rotation, the roller rises, the levers open and push the cylinder 5 to the left, and the cycle repeats,

Due to the fact that the cross section of cavity B is significantly smaller than the section of cavity C, with a small course of the movable cylinder 5, we have a large stroke of the piston box 3.

1177471

Claims (1)

IMPACT MECHANISM FOR MOUNTAIN COMBINES, including a housing, fixed and movable cylinders, a floating piston, a movable cylinder drive, a striker head and an instrument bar, characterized in that, in order to reduce the weight and dimensions of the device, the movable cylindrical cylinder is made in the form of a two-link hinge a mechanism with a roller located on the middle hinge, and a driving cam, the extreme hinges of the two-link mechanism are fixed to the body and the movable cylinder, respectively, while the driving cam is located in the body with the ability to interact with the roller. B b c a 1 1177 '