SU546709A1 - Anti-vibration pneumatic impact machine - Google Patents

Description

A vibro-insulated pneumatic percussion machine with a cylinder floating relative to its body is known. In the cylinder of this machine, there is a drummer, which acts as it moves the working tool and separates the cavity of the cylinder into the front and rear workers; Measures which are alternately communicating with the air-pressure line, as a result of which the drummer performs cyclic movements in the cylinder, which at the same time also moves progressively relative to the body of the machine and the drummer.

This cylinder carries the main air distribution device, periodically connecting the front and rear working chambers of the cylinder with the air-supply line, and an additional air distribution device periodically connecting the front working chamber with the air-pressure line.

The cylinder is reversed in a known machine mainly due to the rebound of the impactor. Since the rebound coefficient of the hammer from the working tool shank can be relatively stable in limited manufacturing operations, the limits of use of such a machine are also limited. At the same time, vibration and exhaust noise in a known car are quite significant.

In order to reduce vibration and exhaust air exhaust noise in the proposed machine, an intermediate shock piston was used as an additional air-distributing device, which was located between the impactor and instrumental systems in a separate cavity of the floating cylinder, forming a shock absorber chamber periodically communicated with it. the air intake manifold and the front working chamber of the cylinder through openings in its wall that overlap and open with an intermediate piston during its movement.

The cavity of the cylinder, where the intermediate shock piston is located, can be formed by a glass that can be connected to the end of the cylinder, which has a cavity in its body that is connected to the front working cage.

The presence of an intermediate piston provides a preliminary cut-off of the compressed air supply to the front working chamber, which significantly reduces air consumption and, accordingly, aerodynam.m 1 ichthy generated by exhaust. Most effective vibration reduction is achieved by full dynamic balancing in all phases.

duty cycle.

Wah FIG. 1 shows the described machine, a longitudinal section; in fig. 2 is a partial view of the machine at the junction of the cup, where the dimensions 1, the intermediate piston, are with the n; iaBaioHj, HM cylinder.

In the housing 1 of the machine (Fig. 1) there is a floating cylinder 2 and a main air distribution device 3 and a drummer 4, which forms the rear 5 and the front 6 working chambers with the cylinder 2. With cylinder 2, the cup 7 is mounted, in which an additional air distribution device is placed in the form of an intermediate shock piston 8 forming a damping chamber 9 connected to the inner surface of the cup 7 and connected through channels 10 and I to certain phases of the working cycle with the air line. A working tool 12 is located in the non-middle part of the housing 1. In the glass 7 there is a hole 13 connected through the channel 11 to the highway. In the body of body 1 there is an exhaust window 14, and in cylinder 2 there are exhaust channels 15. At the rear of Cornus 1 there is a chambers chamber 16, constantly connected to the air-pressure line through channel 17. In the body of cup 7, a cavity 18 is made, connected with channel 19 to the front working chamber 6.

As shown in FIG. 2, grooves 20 are made on the side surface of the cup 7, through which screws 21 are fastened on the side, tightening cup 7 with the rear of cylinder 2, while there is a stop 22 in the back of the bore of cup 7.

The machine works in the following way.

In the initial position, the cylinder 2 is in the extreme forward position, while the piston 8 is also in the forward position, connecting the front working chamber 6 through the channels 13 and 11 to the air-pressure line.

Acting in the front working chamber 6, the compressed air acts on the impactor 4, moving it to its rearmost position. Under the action of the pressure forces of the air compressed by the hammer 4 in the rear chamber 5, the cylinder 2 does not move to the rear position, overcoming the resistance of the pressure force of compressed air acting on the rear end of the cylinder 2 entering the threading chamber 16. After the cylinder 2 has come off the front inner end From the housing 1, it begins to oscillate about a certain point, not the income to the rear and front unores.

Under the action of air pressure in the rear working chamber 5, the air-distributing device 3 connects this chamber to the air-pressure line. After braking, drummer 4 starts the working stroke. After the drummer 4 opens the exhaust channel 15 with its rear edge, the compressed air exhausted in the rear chamber 5 is released into the atmosphere. Continuing its motion, the drummer 4 strikes the rear end of the piston.

8, giving him his kinetic energy. The piston 8, overcomes / the resistance of the air in chamber 9, moves forward and strikes the tail of the working tool 12, opens on its ni-canal 13, at this moment in front of 0 the working chamber 6 through channel 11 from the air-pressure line o, and unlocking the channel 10, isolate chamber 9 from the mainline.

Under the action of compressed air in the front of the working chamber 6, the striker 4 reverses. The piston 8 returns to the extreme position of air 22 in the chamber 9 under the action of the air pressure in the chamber 9 until the joint pressure is reached. , the front of the working chamber 6 with the atmosphere through the channel 15, providing operezhayup, u1O cutoff of compressed air.

Under the action of the pressure impulse of compressed air located in the anterior chamber 6 and in the cavity 18 connected to it by the cane; on the 1st of 19, the shock 4 reverses. After exhausting the exhaust air from the front chamber 6, the drummer 4 completes its reverse course according to the direction, slowing down

air puddle formed in the rear} of the first working chamber 5. Next, the non-writing cycle repeats.

F o rmu lann 3 obrete and u

1. Vibration-proof pneumatic impact impact type, containing a cylinder with a floating body relative to its body, in which the size of the impact is

ipstrumept the drummer, separating the cavity of the tsiliidr to the front 0 and the working chambers, alternately connecting 110H1, and with the air-conduit, the main line O for communicating the cyclical movements to the drummer, while

the cylinder carries the main air distribution device, alternately connecting the working chambers of the cylinder with the air-supply line, and an additional air-distributing device, periodically combining the jup; its front working chamber with the air-pressure line, which in order to reduce the vibration and noise of the exhaust air, additional water distribution device

It is an intermediate shock spacing located between the drummer and the tool in a separate cavity of the floating cylinder, forming with them a damping chamber, periodically communicating with the air-pressure line and with the front working chamber of the cylinder through openings in its wall that are not opened and opened when the intermediate piston moves. 2. Maninna according to claim 1, about tl and h ay nj, and so

that the tsliidra icolus, where the intermediate percussion piston is located, is formed by the glass that is connected to the cylinder, which has a cavity in its body connected to the anterior working chamber.

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