SU1544549A1 - Machine of impact action - Google Patents

Abstract

This invention relates to percussion machines. The purpose of the invention is to improve the operating conditions by reducing the pressure on the handle and increasing its vibration insulation. The machine has a starting valve 12 connected in the air supply line 2, connected via a rod 13 and a cam 14 to a trigger 15. A hollow stepped piston rod is made in the form of a cup 10 with three steps. The end of the larger step is fixed on the end of the barrel 9, the smaller step has radial holes 11, and an annular groove is made on its outer surface to form with the surface bounding the axial hole of the middle step 22 of cylinder 4, ring 23. The inner surface of cylinder 4 is level with its lower stage 5 of the axial bore 6 is provided with an annular groove 24 for forming with the outer surface a smaller stage of the glass 10 with an annular cavity 25. The radial holes 7 of the cylinder 4 are made at the level of the middle stage 22 its axial bore 6 and their cross-sectional area are equal respectively to the cross-sectional areas of the radial bores 11 of the cup 10 and the air-supply line 2. And the diameter D _{1 of the} inner surface of the handle 1 is larger than the diameter D _{2 of the} outer surface of the lower stage 5 of the cylinder 4. 2 or .

Description

iplneny at the level of the middle stage 22 of its axial bore 6 and their cross-sectional area is equal respectively to the cross-sectional areas of the radial holes 11 of the cup 10 and

Air line 2. And the diameter d., the inner surface of the handle 1 is larger than the diameter 2 of the outer surface of the lower stage 5 of the cylinder 4. 2 sludge.

The invention relates to mechanical engineering, in particular, to percussion machines and can be used in construction and installation works and in mining.

The purpose of the invention is to improve the operating condition by reducing the pressure on the handle and increasing its vibration isolation.

Fig. 1 shows a percussion machine with the starting valve closed; figure 2 - the same, with the open starting valve.

The percussion machine contains a bottom handle 1 with an air-supply line 2 and a casing 3, a two-stage cylinder 4 with a lower stage 5 facing the handle 1, with a through axial three-stage hole 6 and radial ones mounted coaxially in the handle 1. holes 7, the barrel 9 fixed in a larger step 8 by the end face with a working tool placed in it and with the possibility of axial movement along the barrel 9 by a piston head (not shown). The machine also has a pneumatic air distributor - a shock absorber with a stepped hollow piston rod with radial holes 11 - located in a two-stage cylinder 4 and connected to an air inlet 2 with radial holes 11. The machine is also equipped with a 2-position valve 12 located in an air supply line connected through the rod 13 and the cam 14 with the trigger 15. The hollow stepped piston rod is made in the form of a cup 10 with three steps 16 - 18. The end of the larger step 16 is fixed on the end of the barrel 9, in the lower step 18 radial o Verstov 11 and on its outer surface an annular groove 19 to form a surface 20 bounding the axial bore 21 of the cylinder 22, the middle stage 4, an annular cavity 23. In addition,

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five

The inner surface of the cylinder 4 at the level of its lesser step 5 of the axial hole 6 is provided with an annular groove 24 to form with the outer surface of the smaller step 18 of the cup 10 the annular cavity 25. The radial holes 7 of the cylinder 4 are at the level of the middle step 22 of its axial hole 6 and their transverse area the cross section is equal, respectively, to the cross-sectional areas of the radial holes 11 of the cup 10 and the air supply line 2. And the diameter d of the inner surface of the handle 1 is larger than the diameter d 2 of the outer surface less than neck 5 of cylinder 4, and a gap 26 is formed between them.

The percussion machine works as follows.

The operator, setting the crimp tool on the object to be processed, by pressing the trigger 15 opens the starting valve 12, and the air, the passage through the channel, the annular gap 26 and through the radial holes 7, enters the annular cavity 23. The thrust created by air in the closed volume of the annular cavity 23 , exerts pressure on the upper end of cylinder 4 and on the end of glass 10. As a result, cylinder 4 and glass 10 will occupy the position shown in FIG. 1. Next, the operator, to drive the tool's mechanism into force, with a somewhat larger thrust, moves the handle 1, and with it the cylinder 4 down (FIG. 2), thereby opening the passage from the annular cavity 23 through the annular cavity 25 and the radial holes 1 1 into the internal volume of the cup 10 and then into the distribution mechanism of the instrument (the direction of air movement is indicated by arrows). When the tool is in operation, the operator must hold cylinder 4 in the position indicated in figure 2, applying a force to handle 1, equal to 51

disbanding. The constant value of the thrust in the annular cavity 23, and consequently, the elimination of the vibrations of the handle 1, is provided by connecting to its volume an additional reservoir in the form of annular cavity 25 communicating with it and a gap 26, as well as the internal volume of the cup 10, and maintaining throughout this volume the network pressure created by the flow of the continuous passage of p; its air through them.

Claims (1)

Invention Formula The percussion machine, containing a hollow handle with an air duct and casing, is coaxially mounted in it a two-stage cylinder with a smaller step facing the handle, with a through axial three-stage hole and radial holes, fixed with a larger step with the end of the barrel with in it with a working tool and with the possibility of axial movement along the trunk — porgan-brisk, and a pneumatic air distributor connected in the cylinder and connected to the air line shock absorber with stepped hollow piston rod with radial ot5 ten 445496 versts, in order to improve the operating conditions by reducing the pressure on the handle and increasing its vibration and vibration, the machine is equipped with a starting valve located in the air inlet duct, the hollow stepped gatok-iorgeni is made in the form of a glass with three steps, butt end of a larger step, mounted on the end of the trunk, having in a smaller step radial holes and an annular groove on its outer surface for 15 formations with a surface bounding the axial orifice of the middle stage of the cylinder, annular cavity, on the inner surface of the cylinder at the level of its lesser axial stage 20 holes are provided with an annular groove to form an annular cavity with the outer surface of a smaller glass step, the cylinder radial holes are made at the level of the middle 25 steps of its axial hole and their cross-sectional area is equal respectively to the cross-sectional area of the radial holes of the piston-piston and the air inlet pipe 30 and the diameter of the inner surface of the handle is larger than the diameter of the outer surface of the smaller cylinder step. FIG. one