SU11695A1 - Pneumatic saw - Google Patents

Description

In the proposed pneumatic saw, a cylinder with a piston is applied, on the rod of which the saw is reinforced. The cylinder is equipped with a distribution valve, by means of which the supplied compressed air is: alternately alternately into one or another cavity of the cylinder.

In FIG. 1 schematically shows the saw in the saw; FIG. 2 and 3 of its sections along the line and nn. one; FIG. 4, 5, 6, 7-distribution valve at different positions of por.

The cylinder 1 has a piston 2, provided with a hollow rod 3 inside, to (the saw is attached). Inside the stem 3 there is a rod 4c with a guide groove 24 - 31 - 32 - 33 - 34, which ends in a piston-shaped end 5 , in order not to pass compressed air into the cavity of the rod 3. The other end of the rod 4 passes through the bottom of the cylinder 1 and tightly fastens to the distribution valve 6. A piston 10 is attached to the piston 2, in the slot 9 of which a spring rod 8 is placed enters the guide groove 2431 g 32-33-34 rods 4 and, ne Referring edviga of the groove at vozvratnopostupatelnyh displacement x of the piston 2, dovorachitsaot rod around the axis 4 and

The distribution valve 6 fastened to it. In order that when turning the crane, the piston itself did not turn, its rod was oval-shaped (Fig. 2 and 3). The corresponding shape is attached to the hole in the cylinder head cover 11. The cover has the shape of a cup and serves as a shaft seal at the same time. It is attached to the cylinder by means of a special tube 12, in which sleeve 13 with tide 14 is inserted. Seal packing is achieved by pressing this sleeve by screwing in nut 15. An oil can 16 is arranged on the same tube, the oil from which is pressed out by a cap 17 through holes 18 in the gap between rod and said sleeve. A distribution valve 6, supplying compressed air to one or the other cavity of the cylinder and releasing it into the atmosphere, is attached to the rod 4 and provided with channels 20 and 22 located perpendicularly to each other. Channel 20 is permanently connected to channel 21 drilled at the end of rod 4 and serves exclusively to supply compressed air through pipes 30 and 19 to the right and left parts of cylinder 1. Channel 22 serves only to discharge exhaust air to the atmosphere. Suppose that the piston 2 of the cylinder 1 is in the right extreme position (Fig. 1), and the rod 8 is in the position 23 of the guide groove 2431-32-333 - 34, while the canals of the crane set the position indicated in FIG. 4. Take a saw in | hands, one hand for the handle 12, and the other for the handKoatKy 25. When you press button 26, the idle hole 28 closes, and when POM1TSI spring lever 27, equipped with a valve 49, opens the channel 21. Compressed air supplied through the sleeve 29 through the channels 21 and, 20, flows through the pipe 30 into the right side of the cylinder cavity, as a result of which the piston will be shifted to the left. Air from the left side of the cylinder cavity will be ejected into the atmosphere through pipe 19, valve channel 22 and cylinder channel 50. As the rod 8 goes along the straight 24 grooves, the crane will be stationary in the position shown in FIG. 4, but when the rod 8 enters the curve portion 31 of the guide groove 24-31-332-334, the valve slightly rotates clockwise and takes the position indicated in FIG. 5. In this case, the channel 20 will be disconnected from the pipe 30, and the supply of compressed air to the right side of the cylinder will cease, and the left part of the cylinder cavity will be connected to the atmosphere. The crane will occupy this position until. until the rod 8 reaches the curve of part 32 of the guide groove. Here, the crane will still turn in the same direction and take the position indicated in FIG. 6, the air release from the left side of the cylinder will cease. Then, in part 33 of the groove, when the rod 8 passes more than half of it, the valve will turn to such an extent that the inlet channel will become the place where the outlet was originally released: and the channel B1 of the hausk will flow where there was the inlet (Fig. 7). The compressed air will be in the left part of the cylinder cavity, and the right part will be communicated with the atmosphere. The piston will begin to move in the opposite direction, and the rod8 will go about the wipe of the 34-way groove. This part of the guide groove 24-31-32-3334 is also curved, and, therefore, the same phenomena will occur with nranon as before, i.e. first, the inlet cut-off, then the cut-off of the release and, finally, the new redistribution of air, only with the valve in the opposite direction.

To cool the rod 3, as well as to blow off sawdust coming from the underside of the saw, the rod 3 is provided with a saw blade 7 with an opening 7 through which air is drawn when the rod leaves the cylinder and pushes off during reverse movement. The grooves of the core 4 are lubricated by screwing the lid 35 of the lubricator 36, from where the oil flows through the opening 37 into the gap 38, and through the holes 39 in the body of the crane b (Fig. 4) penetrates the gap 40. In the gap 38, in addition, the spring washer is lubricated 41, which is used for pressing the crane in order to seal it with the walls of the cylinder. From the gap 40, the oil, under the pressure of the same cover 35, passes through the channel 42 into the cavity 43 of the rod 4. The holes ав4 - 31 - 3233 - 34 are lubricated through the holes 44 and 45, and the cavity liiTOKa is lubricated through the holes 46 and 47. In addition, the oil partially penetrates through the gap 48 into the interior of the cylinder and thereby lubricates its walls.

PROPOSAL SECTION.

1. A pneumatic saw, characterized using a cylinder 1 (Figs. 1, 2 and 3) with a piston 2 in it, the net 3, a hollow oval on the outside, carrying inside the rod 4 with a guide groove 24-31-32-33-34 for placed in the piston 2 of the spring rod 8 and with the distribution, having channels 20. and 22, a valve 6 at the end, equipped, in turn, with an axial channel 21, which is in constant communication with the channel 20 and serves to receive compressed air through the sleeve 29 when pressing the button 26 on the spring lever 27, the supporting valve 49 for the inlet of the channel 21, which edge n 6, rotated by the rod 4, with reciprocating movements of the piston 2 with a saw attached to its rod 3, interacts with its channels 20 and 22 with the openings of pipes 30 and 19 and channel 50 (Fig. 4j 5, b and 7), of which pipe 30 opens into cylinder 1 on one side of piston 2, the second 19 on the other, and channel 50 is in the atmosphere.

2. In the saw described in paragraph I in the wall of the hollow rod 3 holes 7,

In order to use the cavity of this rod, when it moves along the piston-shaped head 5 of the rod 4, as an air pump to cool the rod with distilled air and blow off sawdust delivered by the saw.

3. In the use described in paragraph 1, for the purpose of lubricating the rod 4, axial holes 39 (Fig. 4 and 5) in the body of the crane 6, connected by channel 42 (Fig. 1) to the cavity 43 in the rod 4, communicating with holes 45, 46, 47 in its wall.