The pneumatic hammer

 

(57) Abstract:

The invention relates to mechanical engineering and can be used in the production of impact machines. The pneumatic hammer contains a tool that is installed in the housing, the barrel, inside of which is placed a drummer, arm and spring. The barrel is installed in the housing for axial movement in two cylindrical bands, dividing the space between the casing and the barrel on the three cameras, the average of which is connected with a source of compressed air, and the two extreme camera is constantly communicated with the atmosphere. The barrel is made with two rows of holes connecting the inner cavity of the barrel with the outer surface. The distance between the belts and the rows of holes are made the same. The result is improved vibropitateli pneumatic hammer. 2 C.p. f-crystals, 1 Il.

The invention relates to mechanical engineering, in particular can be used in the manufacture of impact machines.

Known pneumatic hammer (see Tupitsyn K. K. About the improvement of the vibration force characteristics of the pneumatic hammers.- B kN. Protection of the human operator and vibrations in machines.- M.: Nauka, 1977), containing the tool to the stable operation in a wide range of changes in external conditions, as well as the complexity of starting with an arbitrary initial positions of the striker and piston.

The closest in technical essence is a pneumatic riveting hammer type KE, ILC; the breaker of the type MO (see Pneumatic hand machine. Reference/Kunitsyn, I. and et - L: mechanical engineering, 1968) containing the tool housing with the barrel and firing pin.

The disadvantage of this machine is a great force of pressure on the hammer needed to ensure its normal operation, and a high level of vibrations.

The basis of the invention is the task of increasing fibromatoses pneumatic hammer.

The solution of the stated problem is achieved by the fact that the barrel of a pneumatic hammer mounted in the housing for axial movement in two cylindrical bands, dividing the space between the casing and the barrel on the three cameras, the average of which is connected with a source of compressed air, and the two extreme camera is constantly communicated with the atmosphere, the barrel is made with two rows of holes connecting the inner cavity of the barrel with the outer surface, and the distance between the belts and the rows of holes are made the same. The diameter of the front, i.e. races the Jena correspondingly stepped. The inner cavity of the barrel and the surface of the striker performed stepwise, with drummer divides the cavity of the trunk on three cameras, with the front chamber communicated with the atmosphere, and the middle and rear chambers communicated with the outer surface of the barrel.

The device of the pneumatic hammer is illustrated by a drawing (starter not shown).

The tool 1 is installed in the end buochs of the housing 2. In the building there is a shaft 3, inside of which is placed the striker 4. The outer surface of the barrel executed step, the steps of the barrel in contact with the inner surface of the housing through the front belt 13 and the rear belt 14 of different diameters. The diameter of the front, that is, located closer to the tool belt is larger than the diameter of the rear fascia. The casing is placed in the handle 5, between which is placed the spring 6. The inner surface of the housing and the outer surface of the barrel to form three chambers 7, 8 and 9. Chambers 7 and 9 are extreme, and the camera 8 is average. Camera 7 and 9 is constantly communicated with the atmosphere, and the camera 8 in the working position of the pneumatic hammer connected with the source of compressed air. The barrel is made with two rows of holes 15 and 16 connecting the inner cavity of the barrel with the here And= C. Front camera 10 between the tool and the drummer is communicated with the atmosphere, and the average camera 11 and the rear camera 12 is connected holes with the outer surface of the barrel.

The pneumatic hammer is as follows.

In the position of parts shown in the drawing, the compressed air from the secondary chamber 8 through the holes 16 in the shaft 3 enters the rear chamber 12 and accelerates (speeds up) the striker 4 in the direction of the tool 1. Reactive power - compressed air pressure on the bottom of the barrel 3 - accelerates (speeds up) the barrel in the opposite direction. Because the barrel is made of stepped on it the force from the compressed air directed to the instrument. In case 2 applies accordingly equal force in opposite directions. The air from the front camera 10 and the secondary chamber 11 through the openings 15 is displaced at the camera 7 and further into the atmosphere. After the collision of the impactor tool first stops. When the movement of the trunk from the instrument at some point in time average chamber 11 through the openings 15 is communicated with an average camera 8, and the rear camera 12 through the openings 16 with the atmosphere.

To launch hammer pneumatic at any nachladen drummer and instrument. Under the influence of compressed air drummer does the reverse. After the message back camera 12 with the atmosphere of the barrel moves by inertia, overcoming the force of air pressure acting on a step on its outer surface. After stopping the barrel under the action of the same force begins to accelerate in the direction of the tool. Time the message back camera 12 with an average camera 8, and the average camera 11 with extreme camera 7 means the beginning of the forward stroke of the striker and stop, and then reverse acceleration of the barrel 3. The cycle repeats. Spring 6 prevents the transfer of vibrations from the housing to the handle 5.

The impact energy of the hammer is set by the cross-sectional area of the rear camera 12, the stroke length of the striker indicator and pressure in the rear chamber 12. Square ring steps on the outside surface of the barrel is selected from the efforts of the pressure limit value is set to a sanitary standards, and the pressure in the compressed air network. Since the pressure in the middle chamber 8 when the hammer is lower than the pressure in the network, provides some margin required for the permanent contact of the tool 1 with the workpiece. Blow frequency is a function of the impact energy, the mass of the striker Ÿ work of the human operator by improving the vibration and force parameters of the pneumatic hammer.

1. The pneumatic hammer that contains a tool that is installed in the housing, the barrel, inside of which is placed a drummer, arm and spring, characterized in that the barrel is installed in the housing for axial movement in two cylindrical bands, dividing the space between the casing and the barrel on the three cameras, the average of which is connected with a source of compressed air, and the two extreme camera is constantly communicated with the atmosphere, the barrel is made with two rows of holes connecting the inner cavity of the barrel with the outer surface, and the distance between the belts and the rows of holes are made the same.

2. The pneumatic hammer on p. 1, characterized in that the diameter of the front, that is, located closer to the tool belt is larger than the diameter of the rear belt and the outer surface of the barrel is made correspondingly stepped.

3. The pneumatic hammer on p. 1, characterized in that the inner cavity of the barrel and the surface of the striker performed stepwise, with drummer divides the cavity of the trunk on three cameras, with the front communicated with the atmosphere, and the middle and rear chambers communicated with the outer surface of the barrel.

 

Same patents:

The invention relates to the field of mining, in particular to machines percussion, and can be used as a percussion mechanism for drilling holes in rocks of high strength

Pneumatic hammer // 2127365
The invention relates to the mining industry and construction, in particular to pneumatic hammers for demolition of rock and concrete

Pneumatic hammer // 2120550
The invention relates to the field of mining industry and is a pneumatic hammer comprising a housing with exhaust holes and drummer, arm, cover-muffler with the cap tightly secured the crown with slanted through the slots, the tiers of radial outlet channels, a work tool with the device to hold it in place, and the crown is fixed inside the casing of the silencer, which side of the hood is equipped with vozduhoobmenu conical ring, tapering in the direction of the working tool, and the tiers of the exhaust channels made in the cap and at the level of the cone ring

The invention relates to the construction and road machines, namely, hydraulic machines, impact, and can be used in mining, metallurgical industry

Impact device // 2083825
The invention relates to mining and construction equipment, may apply for sporogenous blasting rocks for divergences in the development of blockages, etc

The invention relates to pneumatic devices impact and can be used in mining, engineering and other sectors of economic activity

The invention relates to mining and construction

The invention relates to the field of mining and construction machines and can be used in the design of the bumper, drill hammers and other

Pneumatic hammer // 2110394
The invention relates to mechanical engineering, in particular to machines percussion used in mining, metallurgy, and construction

The invention relates to mechanical engineering and can be used as a hand tool for breaking rock, concrete, lining furnaces, metal cutting shears and applied in mining and construction, as well as in the metallurgical industry

The invention relates to percussive machines with reciprocating movement of the tool, namely safety devices

Hydroshock device // 2099523

FIELD: ultrasonic tools for vibration-percussion working of ductile metals and alloys by plastic deforming, possibly relaxation-strengthening and passivation treatment, for example of welded joints, surfaces of metallic structures subjected to action of atmospheric, water and soil corrosion.

SUBSTANCE: ultrasonic vibration-percussion tool includes sleeve mounted in wave-guide acoustic transformer at interference whose effort corresponds to its radial deformation exceeding amplitude of cross oscillations of wave-guide acoustic transformer in node of longitudinal oscillations when transformer operates in idle mode. Guides are joined to body of tool through elastic vibration-insulation gaskets.

EFFECT: lowered harmful action of vibrations acting upon operator or upon apparatus controlling operation of tool used as part of manufacturing system.

2 cl, 2 dwg

FIELD: building equipment.

SUBSTANCE: pneumatic hammer includes handle, jacket, housing mounted in jacket, air shock absorbing chamber and shock absorbing spring. Sleeve is arranged between handle and jacket; air supply branch pipe is mounted in said sleeve with possibility of motion. Air shock absorbing chamber is formed by means of handle and sleeve. Shock absorbing spring is mounted between beads formed on housing and on jacket.

EFFECT: improved shock absorbing properties of hammer.

3 cl, 2 dwg

Up!