SU831605A1 - Persussive-action hand operated machine - Google Patents

Description

t

The invention relates to mechanical engineering, in particular, to percussion machines, and can be used in construction and mining to destroy building materials and rocks.

Percussion machines with passive vibration isolation system 1 are known.

The closest technical solution to the present invention is a manual percussion machine, containing a housing, an air distribution unit (; a theme dividing the housing cavity into the front and rear chambers; a piston-impactor, made in the form of a jet nozzle, facing the rear chamber, which is constantly communicated with the atmosphere 2.

The main disadvantage of the known manual percussion machines is the low vibration isolation efficiency and productivity.

The purpose of the invention is to increase machine productivity and provide effective vibration isolation.

This goal is achieved by the fact that the exhaust end of the impactor piston is located outside the rear chamber.

FIG. Figure 1 shows a manual punching machine, longitudinal section; in fig. 2, 3 and 4 - piston-hammer in various embodiments of the jet nozzle, longitudinal section.

A manual percussion machine consists of body 1, tool 2, which interacts with a hammer punch 3, which separates the cavity of body 1 into camera 4, the front and rear chambers 5 and 6.

The rear piston 3 has a chamber 7 in the form of a jet nozzle connected to the feed chamber 4 through the openings 8 in the cylindrical back of the nozzle and the rear chamber 6 constantly open into the surrounding environment through the exhaust hole 9. The front chamber 5 directly the rear chamber 6 is connected via chambers 4 and 7 to the air distribution system 10 for alternately feeding the energy carrier medium thereto.

The tool 2 has front and rear stops 11 and 12 moving relative to the housing 1.,

Manual percussion machine works as follows.

When the piston-hammer 3 is in the cocked position, the air distribution system 10 connects the feed chamber 4 with a source of energy carrier and the front chamber 5 with the environment.

When the shock piston 3 moves to tool 2 between the front chamber 5 and the environment, a pressure differential is formed equal to the hydraulic resistance of the exhaust line of the said chamber. This differential, acting on the front back of the body 1 and the tool 2, provides through the front stop of the tool a reliable contact of the body with the tool 2, and of the tool 2 - with the surface 13.

Prior to the impact, the distribution system 10 supplies the energy carrier medium to the chamber 7 and the exhaust from the front chamber 5.

During the strike time, the tool 2 moves relative to the body 1 by a certain amount. After impact, the air distribution system 10 feeds into the front chamber 5 of the energy carrier medium and cuts the feed chamber 4 from it. As a result, the piston-hammer 3 moves backward towards the original (relative to the housing) position, and the housing 1 moves forward until it touches with

front stopper I1 of tool 2, quench the last bounce pulse from the treated surface 13 and bring it back into contact with it.

The air distribution system 10 returns to the initial state with some anticipation of the moment when the piston hammer 3 reaches its initial position in order to extinguish by this moment the energy accumulated by it when moving backward. After the piston hammer 3 has reached its initial position, the cycle is repeated.

Use the proposed manual ma. percussion tires allow the operator to be freed from heavy physical labor, to increase labor productivity.

Claims (2)

Invention Formula A manual percussion machine, comprising a housing, an air distribution system, dividing the housing cavity into the front and rear chambers of the hammer piston, made in the form of a jet nozzle facing the rear chamber with an exhaust face, which is permanently connected to the atmosphere, 5 In order to provide effective vibration isolation and increase productivity, the exhaust end of the impact piston is placed outside the rear chamber. Sources of information taken into account in the examination of 0 1. USSR Author's Certificate No. 546709, cl. E 21 C 3/24, 1974. 2. US patent No. 3732936, cl. B 25 D 9/14, 1973 (prototype). 1 Ibc / 7 f ff wswwww 2 / J  .ct Fi.Z Fy