SU68423A1 - Hammer drill - Google Patents

Description

Percussion perforators, driven by an internal combustion engine built into them, are already known, the spring-loaded mobile part of which hits the drill head. The perforator according to the invention differs from that known in that the shock part of it is the movable cylinder of the engine. The latter compresses the return spring during a stroke, which returns the cylinder to its original position when it is released. FIG. 1 and 2 schematically depict two variants of the proposed perforator in a longitudinal section; FIG. 3 shows the key for compressing the spring. In the housing / under the handle 2 there is a cylinder 3 of an internal combustion engine. When the cylinder 3 moves upwards (towards the handle) under the action of the spring 6, previously compressed with the help of the nut 5 and cutting 4, air is compressed in chamber 7, and vacuum is generated in chamber 8. under the influence of the bottom 10 of the cylinder J produces fuel injection into the cavity //; the fuel is ignited due to preheating of the chamber 7. At the same time, air flows through the windows 72 through the windows. Under the action of expanding gases, the cylinder 3 moves downward, compresses the spring 6 and hits the head of the drill 73. In chamber 8, compressed air. When the cylinder 3 reaches the lower extreme position, the exhaust ports 74 are opened and the chamber 7 is purged with air coming from the chamber 8 through the valve 75. The position of the unclamping spring 6 is through the pipe 76 and the channel 77. of the proposed perforator. The perforator spring 6 is compressed by means of a key 78 with cutouts for projections located at the bottom 70 of the cylinder 3. The working mixture is supplied. At the end of the compression stroke, the plunger 9 the cylinder 3 returns to the outlet of the plunger 9 fuel is supplied. In FIG. 2 shows another variant through the hose 19 and the channels 20, from where it enters the chamber 8 with the valve 21 open and then into the chamber 7 with the valve 15 open. By adjusting the tension of the spring 6 with the help of a nut 22, the required degree of compression of the mixture in chamber 6 is set. The cap 23 can move along the body and serves to reflect the exhaust gases exiting through the windows 14.

To dampen cylinder shocks during idle operation, the perforator is supplied with a spring 24.

In order to prevent detonation, a primer is placed in the cavity 11.

Subject image

A perforator driven by an internal combustion engine built into it, the spring-loaded movable part of which hits the drill head, which also means that the movable part of the perforator is a movable engine cylinder that compresses the reverse a spring that, when uncoupled, returns the cylinder to its original position.

FIG. one

FIG. 2

FIG. 3