SU682362A1 - Pneumatic percussive tool - Google Patents

Description

(54) PNEUMATIC SHOCK ACTION MACHINE

lindr 1 to the front and rear chambers 4 and 5, the triggering device 6 connected through air distribution units 7, 8 to valves 9, 10 and channels with front and rear chambers 4 and 5, and working body 11. Air distribution units 7 and 8 are connected in series so that the input 12 of the primary node 7 is connected by channel 13 to the trigger 6. The first output 14 of the primary node 7 communicates with the input 15 of the auxiliary node 8 by channel 16, and the second output 17 by channel 18 with a rear camera 5. The first output 19 of the auxiliary node 8 communicated by channel 20 to the front camera 4, and the second The first outlet 21 is channel 22 with chambers 4 and 5. The entrance 23 of channel 22 to cylinder 1 is positioned so that at the extreme front position of Porsch 3 it communicates with the rear camera 5 n by the exhaust port 2, and at the extreme rear position of the piston 3 - from the front camera 4 and the exhaust port 2.

The distance A along the axis 24 of cylinder 1 between the exhaust port 2 and the inlet 23 of channel 22 into cylinder 1 must be no more than the length of the sealing part of surface 3.

The inlet 15 of the auxiliary air distribution unit 8 and its second outlet 21 are connected by a channel 25, the cross section of which is much smaller than the cross sections of the channels 18, 20, 22.

The machine works as follows.

In the initial position, the piston 3 is in the extreme forward position (below), resting on the end of the working body 11. Compressed air from the line through the launch device 6, channel 13 is fed to the inlet 12 of the main air distribution unit 7. Since the output 17 of this node is communicated through channel 18 with the rear chamber 5, and the exhaust ports 2 with the atmosphere, the valve 9 closes the outlet 17, opening the access of compressed air, through the outlet 14, the channel 16 to the outlet 15 of the auxiliary air-distribution unit 8.

The valve 10 of the auxiliary unit 8 closes the outlet 21, as it is through the channel 22, the rear chamber 5, the exhaust port 2 communicates with the atmosphere, and the outlet 19 through the channel 20 communicates with the front chamber 4, isolated in this position by means of the atmosphere 3.

Correspondingly, through the outlet 19, the channel 20 enters the front chamber 4 with compressed air, which ensures that the piston 3 makes a reverse stroke in the start mode, after which its forward stroke begins.

After transferring the valve 9 and opening the outlet 17, the outlet 14 is automatically closed and the access of the compressed air to the auxiliary valve unit 8 is stopped.

After the piston 3 making the forward stroke, the trailing edge communicates the rear chamber 5 through the channel 22 with the outlet 21 of the auxiliary unit 8, the valve 10 opens the outlet 21, together with the channels 16 and 22, the rear chamber 5, the outlets 14 and 17 of the main unit 7, thereby preparing valve 9 for transfer.

After the piston 3 with the front edge closes the exhaust openings 2 in the front chamber 4, free air is compressed and, accordingly, the pressure through the channel 20 to the outlet 19 of the auxiliary unit 8 increases. Under the action of a pressure force of compressed air directed to the valves 10 output side 19, it is transferred, together with the input 15 of the auxiliary node 8, the channel 16 with the output 14 of the primary node 7.

Under the force of pressure of compressed air directed to the valve 9 on the outlet side 14, and to reduce the driving force acting on the valve 9 on the outlet side 17, the valve 9 is thrown, closing the outlet 17. After the hole 3, with its trailing edge, opens the exhaust ports 2 rear chamber 5 and outlet 17 through channel 18 are in communication with the atmosphere.

After the completion of the direct stroke by the porous 3 and the transfer of force to the working element 11 under the action of compressed air in the front chamber 4, the piston 3 begins to reverse.

After the rear edge of the piston 3 of the entrance 23 of the channel 22 in the rear chamber 5 is closed, the compressed air enters the channel 22 through the channel 25, acting on the outlet 21, the valve 10 changes to the “weighted position”, as the pressure of compressed air acts on both its sides.

After the piston 3, continuing to reverse, opens the front edge of the exhaust holes 2, together with the front chamber 4, the channel 20 and the outlet 19 with the atmosphere, the valve 10 closes the outlet 19, the compartment compressed air supply to the front chamber 4.

After the piston 3, by an irregular edge, opens the channel 22 and connects it through the front chamber 4 and the exhaust ports 2 to the atmosphere, the valve 10 will again change to a “weighted state,” since both outlets 19 and 21 are connected to the atmosphere and through the inlet 15, channel 16, the outlet 14 of the primary node 7 is connected to the atmosphere. As a result, the valve 9 closes this outlet 14 by opening, through the outlet 17, the access of compressed air to the rear chamber 5. Moving by inertia and the iodo-field force to cause the air compressed in the rear chamber b, the bottom 3 completes the return stroke, and the forward movement begins pnpc operation is repeated.

Claims (1)

1. Pneumatic percussion machine, containing a cylinder with an exhaust hole, a piston located in it, separating it from the front and rear