RU46812U1 - PNEUMATIC HAMMER - Google Patents

Abstract

The invention relates to the mining industry and construction, in particular to pneumatic hammers for the destruction of rock and concrete. The proposed pneumatic pneumatic hammer contains a handle, a barrel, an intermediate link consisting of a shirt and a sleeve, a valve, an annular chamber formed by an internal bore in the intermediate link, with valve air distribution consisting of a valve box, a seat, a cover and a valve, a system of holes, a working chamber the course, the idle chamber, the hammer, the air outlet of the four chambers of the receivers, a sleeve that is externally dressed on the barrel, and a casing with holes.

Description

The invention relates to the mining industry and construction, in particular to pneumatic hammers for the destruction of rock and concrete.

Known pneumatic hammer, for example the patent of R.F. 2127365 Class E 21 C 37/24, 1999, including a body with exhaust openings on the handle side, a drummer, a muffler cover with an inner collar (ring sleeve) and inclined through grooves in the sleeve, a cap with an annular volume limited by the body, a working tool with a device for holding it relative to the housing, an intermediate casing with an inner collar (ring sleeve) and inclined through grooves in the sleeve, forming counter grooves in the grooves in the sleeve of the muffler casing, installed between the muffler and the cap com ..

The disadvantage of this hammer is: 1. The exhaust air is discharged only through the muffler casing, as a result of which the air flows in the bushing channels have high speeds, that is, they have high internal energy; 2. the inner annular volume of the cap when filling with air from the intermediate casing is not filled effectively enough, since the inlet flow into the annular chamber of the cap is counteracted by the counterflow of exhaust from it, that is, the counterflow of air, having a relatively small internal energy, cannot create conditions for crushing and attenuation of the flow air from a muffler casing ..

Known pneumatic hammer RF patent 2174600 class E 21 C 37/24., Which contains a handle, a housing with a central channel, a muffler casing, a drummer, chambers for working and idling, through exhaust channels, a cap forming an annular blind chamber with the casing, an intermediate casing working

tool with a device for holding it relative to the body. In the housing between the idle chamber and the annular blind chamber, through exhaust channels are made.

The specified pneumatic hammer is the closest technical solution to the proposed one and is a prototype.

The prototype disadvantage

The purpose of the invention: to reduce the metal consumption of the product, simplifying the manufacturing technology, to obtain the possibility of using less expensive materials, cheapening the cost of the product, to obtain a design convenient to use.

This goal is achieved in that the pneumatic hammer, see figure 1 contains a handle 1, a barrel 2, an intermediate link 3, consisting of a shirt1 and a sleeve 2 (see figure 2, in the main drawing, these two parts are not highlighted separately), valve 4, annular chamber 5, formed by an internal bore with valve air distribution, consisting of valve boxes 6, seats 7, covers 8 and valves 9, see the separately issued diagram of the gas distribution mechanism of figure 3 and the system of openings, the working chamber 10, the idle (reverse) chamber 11 , drummer 12, sty 13, 14, four receivers chambers 15, the sleeve 16, the housing 17.

The intermediate link 3 of figure 1 in this hammer consists of two parts, see figure 2 shirts 18 and sleeves 19, which are pressed into each other during the manufacture of the intermediate link, which saves material and the ability to use less expensive material, thereby reducing the cost of the product .

Further, in the manufacture of the barrel 2, see figure 4. In the casing, only two deep holes are drilled against twelve holes in similar hammers. Outside

the barrel has four faces, see the section DD DD of Fig. 4. This is a decrease in weight. Openings for the exit of the exhaust air go into these faces. A sleeve 16 is worn on the barrel 2 from the outside, together with the faces of the barrel, it forms four chambers 15 for the exhaust air outlet and damping noise. Four sides of the barrel simplify the technology of barrel manufacturing because the opening of deep channels for the exit of exhaust air from the inside of the working chamber disappears, thereby reducing the amount of marriage during the manufacture of the barrel, while the barrel is less cooled during operation.

Air hammer works as follows.

When you press the handle 1, see figure 1 in the axial direction, the handle moves along the intermediate link 3. The handle presses on the valve, which allows access of compressed air from the supply line to the annular chamber 5, formed by the internal bore in the intermediate link 3 and the air distribution mechanism. Further, compressed air passes through an air distribution mechanism, through channels and a system of holes, alternately enters the working chamber 10 or idle 11, depending on the position of the valve 9 and the hammer 12. The exhaust air from the chambers 10 and 11 through the openings 13 and 14 is transferred to four chambers - receivers 15 formed between the housing 2 and the sleeve 16. see figure 2. In these chambers, the exhaust air expands, equalizes in time with pressure. The flow of exhaust air practically loses its impulse character; also, part of its energy is extinguished. In the annular flow chamber 5, the exhaust air coming out of the four chambers of the receivers is mixed, further expanded, and through the system of openings in the casing 17 is released into the atmosphere.

Claims (1)

Pneumatic jackhammer containing a handle, a barrel, an intermediate link, a hammer, working and idle chambers, an annular chamber, a casing with holes, characterized in that the intermediate link is made of a shirt and a sleeve that are pressed into each other, making up one whole mechanism gas distribution consists of a box, seat, cover, valve, pins made without welding, the barrel has two deep holes and a four-sided outer surface, on which a metal sleeve is worn on the outside, together with the faces it zuet four chambers the exhaust air to exit and sound attenuation.