SU1013798A1 - Pneumatic impact-action machine air-distributing device - Google Patents

Description

The invention is related to air distribution devices and can be used in pneumatic percussion machines for construction and installation works.

An air distribution device for pneumatic percussion machines is known, which comprises a chamber, which is connected by means of supply channels with a source of compressed air, and exhaust channels - with cavities of the machine 1.

The disadvantage of this air distribution device is its inefficiency.

The closest technical solution to the invention is an air distribution device of pneumatic percussion machines, comprising a chamber connected alternately by means of a shank and feed channels with a source of compressed air, and outlet channels with a cavity 1 "", placed in the chamber with working surfaces for closing the outflow channels and the choke in the form of a calibrated gap 2.

A disadvantage of the known air distribution device is the complexity of the design.

The aim of the invention is to simplify the design.

This goal is achieved by the fact that in the air distribution device of pneumatic machines blow-. action, containing a chamber connected alternately by means of a shank and supply channels with a source of compressed air, and exhaust channels with cavities of a machine, a distribution element placed in a chamber with working surfaces for closing off the exhaust channels and a choke The shank is made in one piece with the distribution element having supply channels, and the throttle is formed by non-ramming of the outer surface of the distribution element and the surface of the machine piston, onto which Exit m inlet conductive channels of the distributor element.

FIG. Figure 1 schematically shows a pneumatic percussion machine with an air distribution device, longitudinal section; in fig. 2 - part of the piston with the distribution element; in fig; 3 is a section A-A in FIG. one.

The percussion pneumatic machine comprises a housing 1, in the upper cavity of which there is a cavity 2 communicating permanently with a source of compressed air (not shown).

In the housing 1, the piston 3 is placed with the possibility of movement with the stem C, which is slidly sealed in the lower part of the housing 1 and at its end a working tip (not shown) is fixed. In the upper part, the piston 3 has a sleeve 5. The rod k and the sleeve 5 form a chamber 6, in which with the possibility of limited longitudinal movement is located a distribution element 7 made in one piece with the shank 8 serving for

 supplying air to chamber 6,

The chamber 6 with the supply channels 9 formed on the distribution element 7 communicates with the cavity 2. In the sleeve 5 there are diversion channels 10 for communicating the chamber 6 with the working cavity 11, and channels 12 and 13 in the stem. .

The distribution element 7 has

0 a working surface 15 intended to close off the outgoing channels 10 when it fits to the surface 16 of the sleeve 5 and a working surface 17 to close off the outgoing channel 12 when it fits to the surface 18 of the rod k. At the entrance of the inlet channels 9 into the chamber 6, a choke 19 is formed in the form of a calibrated gap between the outer non-working surface 20 of the distributing element 7 and the inner surface 21 of the piston 3 to which the inlet channels 9 exit. to adjust the amount of compressed

5 air entering the cavities 11 and 1,

In the initial state, the piston 3 is in the upper position, and the distribution element 7 is in the lower position. While the cavity 11 of the stroke channel 9 is in communication with the camera 6 and then through the throttle 19 and the channels 9 with a source of compressed air. The idle cavity 14 is in communication with the atmosphere by the exhaust ports 22.

Pneumatic percussion machine works as follows.

When turned on, compressed air from cavity 2 through the channel enters into

Claims (1)

AIR DISTRIBUTION DEVICE FOR PNEUMATIC SHOCK ACTION MACHINES, containing a chamber alternately connected by means of a compressed air meter, and outlet channels - with machine cavities, a distribution element located in the chamber with working surfaces for overlapping outlet channels and a throttle in the form of a calibrated gap, which differs in that in order to simplify the design, the shank is made in one piece with a distribution element having supply channels, and the throttle is formed by a non-working outer the distribution element and the piston surface of the machine, onto which the feed channels of the shank and feed channels of the city go FIG. 1 targeting element.