Pneumatic percussion

 

(57) Abstract:

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. Pneumatic device includes a barrel, a firing pin guide tube mounted on the longitudinal axis of the barrel, the lid and instrumentalization. The drummer is installed with the possibility of reciprocating movement along the outer surface of the guide tube and the inner surface of the barrel and with the possibility of separating the cavity of the barrel on the camera working and idling. Working tool elastically connected with instrumentalization. The inlet channel of the camera of the stroke is made in the cover, and the inlet channel camera idling in the cavity of the guide tube. One end of the guide tube is removed from the chamber stroke for the cover and it has an air distributing valve mechanism. The other end of the guide tube is located in the chamber of idling. Put bent tube, one end of which is connected to the guide tube and the other end to instrumentholders guide tube, and with its other end with camera idling through an additional channel. The invention provides improved performance by increasing the frequency of impacts and the energy of a single strike. 6 C.p. f-crystals, 4 Il.

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.

In various pneumatic devices percussion previously used a variety of structural funds to improve the power and efficiency of the tool.

Known pneumatic hammer, containing the barrel, a drummer, a tube mounted on the longitudinal axis of the barrel, the lid and instrumentalization mounted on opposite ends of the barrel, and the drummer is installed with the possibility of reciprocating movement along the outer surface of the tube and the inner surface of the barrel and with the possibility of separating the cavity of the barrel on the camera working and idling, working tool, elastically connected with instrumentalization, air-distributing mechanism associated with the intake channel channel camera idling - in the cavity of the tube [1].

In this technical solution, the tube is made multichannel and it made a slit orifice for periodic messages chambers with the atmosphere. On the outer surface of multichannel tubes made of the longitudinal recess.

Limitations of the design are:

movement of the striker in the design is sent to the internal surface of the barrel and part of the outer side surface of the striker, because multichannel tube is not a guide, but serves to supply air into the chamber idling and exhaust air into the atmosphere;

- execution of longitudinal grooves on the outer surface of multichannel tubes leads to leakage of compressed air from the chamber of the stroke in the camera idling, which reduces the impact energy;

execute tube multi-channel multi-channel recesses, and performing it slotted throttle complicates the device and reduces the durability of its functioning.

The closest technical solution is a pneumatic percussion, containing the barrel, the firing pin guide tube mounted on the longitudinal axis of the barrel, cap and instrumentalisation move along the outer surface of the guide tube and the inner surface of the barrel and with the possibility of separating the cavity of the barrel on the camera working and idling, a working tool, elastically connected with instrumentalization, the air-distributing mechanism associated with the inlet channels of the cameras working and idling, and the inlet channel of the camera of the stroke is made in the cover, and the inlet channel camera idling in the cavity of the guide tube, one end of which is removed from the chamber stroke for the cover and it has an air distributing valve mechanism [2].

This technical solution in the body of the working tool completed with the cavity and the channel. The bottom cavity is located from the edge of the working tool, and by the end of the shank cavity is made in the form of a Central hole. The channel of the working tool completed with ensuring the supply of air from the cavity of the working tool to its shank into the camera idling. One end of the channel communicates with the cavity, and the other with the outer surface of the working tool. The end of the guide tube is removed from the camera idle for instrumentalization and introduced through the Central opening into the cavity of the working tool and placed between the bottom of the cavity of the working tool and the end of the channel. The end of the shank of the working tool made in the form of a convex polypheno from the disadvantages of the previous, because the guide tube performs the function of directing drummer. The device allows to increase the impact energy to reduce its weight and increase durability while processing a work tool hard and dense materials.

Limitations of the device are:

- implementation of a working tool with a cavity and a channel for air supply into the chamber idling reduces the frequency of attacks, and at high impact energy and changing the density of the processed material this leads to short-lived work of the working tool (this tool can only handle materials with a constant and uniform density);

- total pneumatic resistance between the camera idling and starting device air distributing mechanism significantly, which does not allow to increase the effective cross-sectional area of the striker from the front of the stroke and to further increase the energy of a single blow;

- implementation of a working tool with a hemispherical end and with a cavity and a channel, the introduction of the end of the guide tube into the cavity of the working tool complicates the design as a whole.

Solved by the invention of tasks The technical result, which is obtained when performing device - an increase in the frequency of the beats, the energy of a single blow, power, simplifying the design.

Additional technical result, which is obtained in versions of the device, increase the durability of the working tool and the drummer, as the main, more wear in the process of work items, the increase in the effective cross-section of drummer, increase the volume of compressed air, providing the possibility of regulation of the elastic connection of the working tool with instrumentalization for processing different materials.

To solve the problem with achievement of the technical result in the known pneumatic percussion device containing the barrel, the firing pin guide tube mounted on the longitudinal axis of the barrel, the lid and instrumentalization mounted on opposite ends of the barrel, and the drummer is installed with the possibility of reciprocating movement along the outer surface of the guide tube and the inner surface of the barrel and with the possibility of separating the cavity of the barrel on the camera working and idling, working tool, elastically associated with idling, moreover, the inlet channel of the camera of the stroke is made in the cover, and the inlet channel camera idling in the cavity of the guide tube, one end of which is removed from the chamber stroke for the cover and it has an air distributing valve mechanism according to the invention the other end of the guide tube is located in the chamber idling entered bent tube, one end of which is connected to the guide tube out of the chamber of the stroke, and the other to instrumentalization, which is provided with an additional channel, hollow curved tube with one end communicated with the cavity of the guide tube, and with its other end communicates with the camera idling through an additional channel, made in instrumentalization.

Possible additional embodiments of the pneumatic device, where appropriate, to:

- the curved tube was made in the form of a lateral arm;

- were introduced elastic elements mounted on instrumentalization with the opportunity to interact with the drummer;

- instrumentalization was equipped with a flange, have entered the ring with holes, studs with curved ends, tension springs, the tool was at Egnatia the ends of which are mounted in the holes of the ring, and the other ends of the spring-loaded tension springs;

- introduced a handle mounted on the studs and attached to the barrel with the ability to compress the tension springs;

- working tool was made in the form of peaks, inside of which is a blind longitudinal bore and the outer surface of which is provided with longitudinal ribs;

the drummer was provided with blind holes formed therein from the front of the stroke.

These advantages, and features of the present invention are explained best choices, with reference to the attached figures.

Figure 1 is structurally depicts a longitudinal section of a pneumatic percussion;

Fig. 2 is a cross section of the working tool B-B in Fig. 1;

Fig. 3 is a cross section of the working tool A-A in Fig. 1;

Fig. 4 is a longitudinal cross-section design of the starter.

Pneumatic impact (Fig. 1) includes a barrel 1, the striker 2, the guide tube 3 mounted on the longitudinal axis of the barrel 1, the cover 4 and instrumentalization 5. Cover 4 and instrumentalization 5 secured to the opposite ends of the barrel 1. Drummer rubke 3 and the inner surface of the barrel 1 and with the possibility of separating the cavity of the barrel 1 to the chamber 6 of the stroke and the camera 7 idling. Working tool 8 is elastically connected with instrumentalization 5, the air-distributing mechanism (can be done in various ways and is not the subject of the present invention) is connected with the inlet channels 9, 10 cameras 6, 7 working and idling. The inlet channel 9 camera 6 of the stroke performed in the lid 4. The inlet channel 10 camera 7 of idling is made in the cavity of the guide tube 3. One end of the guide tube 3 is removed from the chamber 6 of the stroke for the cover 4 and is valve 11 air distributing mechanism.

The other end of the guide tube 3 is located in the chamber 7 of idling. Put the curved tube 12, one end of which is connected to the guide tube 3, and the other to instrumentalization 5. Instrumentalization 5 is provided with an additional channel 13. The curved cavity of the tube 12 with one end communicated with the cavity of the guide tube 3 and with its other end communicates with the chamber 7 idling through said additional channel 13.

Curved tube 12 may be made in the form of a side arm (Fig. 1), which improves the ease of use of the pneumatic device when the provisions in space other than vertical the Eden elastic elements 14, installed on instrumentalization 5 interoperable with drummer 2, which reduce energy loss during collisions drummer 2 with the working tool 8 and instrumentalization 5 when moving it working tool 8.

To ensure reliable and convenient in operation the connection of the working tool 8 with a pneumatic device instrumentalization 5 has a flange 15, entered the ring 16 with holes, studs 17 with curved ends, a tension spring 18. Working tool 8 is elastically connected with instrumentalization 5 by means of a ring 16 mounted on the working tool 8 on a sliding fit, and pins 17. The bent ends of the rods 17 are installed in the holes of the ring 16, and the other ends are biased. Tension springs 18 mounted between the free ends of the rods 17 and the flange 15.

Handles 19 are used to compress the tension springs 18, rotation of the stud 17 and the liberation of the ring 16 to remove the working tool 8 of the pneumatic device.

Working tool 8 may be made in the form of peaks, inside of which is a blind longitudinal bore 20 (Fig. 2) and the outer surface of which is provided with longitudinal ribs 21 (Fig. 2, 3).

In Fig. 1 also shows: guide starter 23; cover 24 valve 11; an exhaust hole 25 made in the barrel 1 and informing the chamber 7 with the atmosphere; a cover 26 covering the exhaust hole 25 with a gap; a channel 27 for supplying air from the launching device; parallel air channel 28 formed by the curved cavity of the tube 12; the flange 29 of the upper valve seat 11; channel 30 to supply air under the lid 24 of the valve 11; the outer spring 31 of the starter; the intermediate sleeve 32; coupling pin 33; spring 34 compression tie rods 33. As can be seen from Fig. 1, the cover 4 is made in the form of a valve seat 11.

In Fig. 4 shows the handle 35; shock absorber 36 of the arm 35; valve 37 starter; the inner spring 38 of the starter; the slots 39 in the valve 37 starter.

Powered pneumatic impact (Fig. 1) as follows.

When compressed air in the channel 27 from the starter through the valve 37 that goes under the cover 24 through the channels 30 in the closed valve 11 and the inlet channel 10 and parallel to the air channel 28 into the chamber 7 of idling. Drummer 2 podyezd barrel 1 and the cover 26 and enters the atmosphere. The valve 11 takes the top position, and the air is drawn through the inlet channel 9 in the cover 4 into the chamber 6 of the stroke and sends drummer 2 down. Drummer 2 has the end of the working tool 8. The process is repeated cyclically.

When the working tool 8 falls into the voids of the rock, the drummer 5 hits instrumentalization 5 through the elastic elements 14 made, for example, in the form of shock springs, thereby protecting the device from damage. The ring 16 is used to fasten the bent ends of the rods 17 and holds a working tool within instrumentalities 5 with a tension spring 18. Now, when the working tool 8 falls into the void of rocks and drummer 2 beats through instrumentalization 5 on the shaft 1, it does not lead to the unwinding of the fasteners and the destruction of the device due to the installation of the elastic elements 14. Now the unused energy of the striker 2 is accumulated and then returns the drummer 2, which also increases the capacity of the device.

The magnitude of the elastic connection of the working tool 8 with instrumentalization 5 is provided handles 19. Handles 19 are used to rotate and compress the tension springs 18. To release and replacement of the working tool 8 with the ring 16. Working tool 8 is extracted from the ring 16 and the intermediate sleeve 32.

To the working tool 8 was free at the moment of impact and did not use impact energy to overcome the action of relations and, at the same time that he was attached to instrumentalization 5 entered the intermediate sleeve 32. Now working tool 8 free at the moment of impact and not pressed against the device. But to prevent loss of tension springs 18 and the stud 17 with curved ends, a retaining ring 16.

Increasing capacity of the device is achieved as follows:

- increase in the volume of compressed air supplied under drummer 2 two parallel channels through the inlet channel 10 and parallel air channel 28 formed in the curved tube 12 (Fig. 1). The growth of the volume of compressed air leads to an increase in the speed of the striker 2 and the possibility of increasing its cross-section. An increase in the effective surface section of the striker 2 can be achieved by reducing its mass by performing it blind holes 22;

- the reduction of mass of the striker 2 by executing it with the Central through hole in which you installed the guide tube 3, and the side of the deaf overspray elements 14 - internal anti-shock absorbers placed in instrumentalization 5;

- the introduction of the ribs 21 and the deaf longitudinal hole 21 of the working tool 8 (Fig. 2, 3) contributing to the reduction of its mass and the increase in cross-section. The introduction of the ribs 21 of the working tool 8 and the deaf longitudinal hole 21 allows you to bring its mass to the mass of the striker 2, thereby increasing the transmitted impact energy, but also increases the strength and durability of the working tool 8. To enhance wedge destroying the breed effect, the diameter of the working tool 8 can be increased with a simultaneous decrease of its weight compared with the known working tools;

- reducing leakage energy coming from pneumatic devices in the operator through the handle 35 through the installation of shock absorber 36 (Fig. 4). The damper 36 may be made for example of a rubber tube filled with foam that provides increased comfort and protection of the operator against mechanical impacts on the handle 35 of the starter;

- increase in the volume of compressed air, which is optionally achieved in comparison with the known pneumatic devices races is rareza 39 in the valve 37 starter or increase their passage sections, what are interconnected using for additional compressed air into the chamber 7 of idling through a curved tube 12.

Most successfully claimed pneumatic percussion industrially applicable in mining, construction and steel industries.

Sources of information

1. USSR author's certificate N 1221339, E 21 3/24, publ. 30.03.86.

2. The application for the grant of a patent of the Russian Federation for invention N 95120261/03, E 21 3/24, publ. 27.10.97 (bull. N 30).

1. Pneumatic percussion, containing the barrel, the firing pin guide tube mounted on the longitudinal axis of the barrel, the lid and instrumentalization mounted on opposite ends of the barrel, and the drummer is installed with the possibility of reciprocating movement along the outer surface of the guide tube and the inner surface of the barrel and with the possibility of separating the cavity of the barrel on the camera working and idling, working tool, elastically connected with instrumentalization, the air-distributing mechanism associated with the inlet channels of the cameras working and idling, moreover, the inlet channel of the camera, stroking the implementation of the camera of the stroke for the cover and it has an air distributing valve mechanism, characterized in that the other end of the guide tube is located in the chamber idling entered bent tube, one end of which is connected to the guide tube, and the other to instrumentalization, which is provided with an additional channel, hollow curved tube with one end communicated with the cavity of the guide tube, and with its other end communicates with the camera idling through an additional channel, made in instrumentalization.

2. Pneumatic device under item 1, characterized in that the curved tube made in the form of a side arm.

3. Pneumatic device under item 1, characterized in that the introduced elastic elements mounted on instrumentalization interaction with the drummer.

4. Pneumatic device under item 1, characterized in that instrumentalization provided with a flange, entered the ring with holes, studs with curved ends, tension springs, a working tool elastically connected with instrumentalization through a ring mounted on the working tool and studs, curved ends of which are mounted in the holes of the ring, and the other ends of the spring-loaded tension springs.

5. Pneumatic is the opportunity to compress the tension springs.

6. Pneumatic device under item 1, characterized in that the working tool made in the form of peaks, inside of which is a blind longitudinal bore and the outer surface of which is provided with longitudinal ribs.

7. Pneumatic device under item 1, characterized in that the drummer provided with blind holes formed therein from the front of the stroke.

 

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2 dwg

FIELD: construction.

SUBSTANCE: machine comprises a housing and a striker arranged therein, forming the upper chamber and the lower chamber, a vacuum compressor located at the upper part of the housing, connected to the upper chamber and comprising at least one pair of centrifugal compression-vacuum mechanisms mounted oppositely to each other with suction openings connected to the disc and having a common channel through an opening in this disc, which forms chambers above and below the disc in the upper housing part. The chamber above the disc is connected to the atmosphere, and cuts off said upper chamber and the chamber under the disc from the atmosphere. Said centrifugal compression-vacuum mechanisms are electrically connected to a three-position switch electrically connected to the current source, a receiver connected to the upper chamber, a magnetic lock for the striker, installed in the upper chamber, and a working tool. The lower chamber is connected to the atmosphere. The receiver is located in the housing between the upper chamber and the vacuum compressor and is connected to the upper chamber through the openings of the centering disk separating the receiver from the upper chamber, and to the vacuum compressor - through the openings in the mounting disc separating the vacuum compressor from the receiver. The magnetic lock for the striker is connected to a regulator located in the receiver and made with the possibility to change its length.

EFFECT: ensuring the possibility to expand the energy of impacts and the frequency, to avoid pressure losses during the flow-over from the receiver to the upper chamber, to reduce the machine dimensions by width, and to work in hard-to-reach places.

3 cl, 1 dwg

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