Pneumatic percussion device with throttling air distribution

FIELD: percussion mining and construction machines, particularly methods or devices for dislodging with or without loading.

SUBSTANCE: device comprises supply-line air chamber, switching device, which initiates compressed air delivery to supply-line air chamber, hollow cylinder, striker, which divides cylinder interior into idle and working stroke chambers and lid installed at cylinder end from working stroke chamber side. The lid has rim supporting rim of cup so that supply-line air chamber is created in-between. Device also has pipe arranged in lid orifice and provided with permanently opened inlet throttle channel communicated with idle stroke chamber. The inlet throttle channel connects supply-line air chamber with idle stroke chamber. Lid also has annular inlet throttle channel providing flow inlet in working stroke chamber and defined by pipe side wall and lid orifice. Device also comprises accumulation chamber permanently communicated with working stroke chamber through radial bypass channel in cylinder, discharge channels formed in side cylinder walls and working tool with stem. Blind augmenter is located in cylinder wall from the side of idle stroke chamber. The augmenter is permanently communicated with supply-line air chamber by means of radial augment channel made in cylinder body. Distance between distributing augment channel edge section and discharge channel is less than striker travel.

EFFECT: increased impact force to be applied to substance to be worked.

1 dwg

 

The invention relates to the field of construction and mining machines impact and can be used to create manual pneumatic hammers for engineering and heavy hammer to fracture rock and frozen ground.

Known pneumatic hammer (see, for example, as the USSR №787632, M CL. IS 3/24, 1980), contains a working tool, the drummer with the channel opened by the camera of the stroke, situated towards the end of the cylinder opposite to the working tool and the side surface of the channel inlet and outlet with an annular groove in the cylinder and chamber idling on the side of the working tool, indicated by a channel in the cylinder, and the annular recess (camera) side of the channel release communicated constantly with a network of compressed air and is covered by the drummer periodically.

Specified and similar technical solutions have shortcomings: the ring groove (camera) and the camera idling communicated constantly among themselves, that causes considerable pressure from the side of the camera idling and inhibits the drummer, reducing its initial speed, and hence the kinetic impact energy is transmitted to the tool; a channel in the drummer through radial exit on its lateral surface before impact will areposted part of the air with considerable pressure from the camera work in the annular recess and through a channel in the cylinder chamber idling, which also helps to increase the back pressure in the chamber is idle before the collision of the impactor tool; a channel in the drummer after the collision due to the radial exit perepuskat part of the air from the annular chamber, and hence the camera idling in the chamber of the stroke with a lower air pressure in it, which significantly reduces the pressure pulse from the camera idle and does not provide the estimated stroke of the striker, increases the time of idling, reduce the frequency and impact energy.

Also known pneumatic hammer with butterfly distribution (see, for example, patent RF №2062692, M CL. 25D 9/04, 1996), containing network camera, handle to the device turn on the compressed air supply, a hollow cylinder, the drummer with the Central channel, camera blank, and the worker moves up through the Central channel of the striker tube, the cap having a flange and a Central through hole for conduction through her tube inlet into the chamber of the stroke of the throttle channel, the annular accumulation chamber in communication with the chamber of the stroke through the bypass channel, the outlet channel is made in the side wall of the cylinder and the working tool shank.

The specified pneumatic percussion with butterfly distribution in the held as a prototype as containing the greatest number of essential features, used in the proposed technical solution.

The prototype has drawbacks: increased accumulation of the volume of the chamber idle, which should be filled with air from the network through the throttle channel inlet in the tube that leads to the deceleration of the striker by creating significant back pressure in the chamber idling at the end of the stroke and, consequently, to the loss of kinetic energy of the striker, and in the beginning of the idle speed after the collision and increase the volume of the chamber idling the pressure pulse of air from the chamber idling is insufficient to ensure the calculated stroke of the striker, resulting in increased time idling and reduced the frequency of strikes with significant poor air flow from the network.

Noted disadvantages of the prototype in General reduce the effect of shock interaction with the treated environment.

The technical problem solved by the invention is the improvement effect of impact on the treated environment by reducing the volume of the actual camera idling and fixing the channel inlet in the tube start functions, than it is possible to significantly reduce the air flow from the network and to reduce the pressure in the chamber at the end of idling; performing an annular enclosed chamber of the afterburner and e is the volume constantly throttle intake with camera network air eliminates the back pressure in the chamber idling and increases the pressure pulse is idling, after the message the camera idle and stagnant camera afterburner will increase significantly due to the inclusion of accumulated therein with air pressure close to the network.

You need some plot movement of the striker to block the channel of fast and furious, telling the camera idle and stagnant chamber of the afterburner when working stroke and to open the message at idle. Marked will not create significant back pressure of air in the chamber idling before impact, and therefore, increase the speed of the collision. During acceleration of the striker in the initial period of idling air pressure in the chamber idling due to receive it from the network camera channel launch in the tube will fall slightly, and when opening the afterburner channel pressure in the chamber idling will increase, and the drummer, having received additional boost pressure will increase the speed of its movement in the direction of the cover. Marked will reduce the movement of the striker when idle.

Thus, to achieve the effect you want to change the coordinate of the afterburner channel and stagnant chamber of the afterburner to constantly communicate with a network of compressed air through the chamber network of air.

The problem is solved in that the pneumatic percussion with others who selnum the distribution includes camera network air the device turn on the compressed air network of air, a hollow cylinder, placed in it the drummer, dividing the cylinder chamber on the camera idle and working strokes, mounted on one end of the cylinder side chamber stroke the cover flange, on which rests a glass of education of the camera network of air between its bottom and a lid installed in the hole of the cover tube with open into the chamber idling intake throttle channel connecting the camera network air chamber idling, the annular orifice channel inlet into the chamber of the stroke, formed between the side surface of the tube and the hole in the lid, the accumulation chamber constantly in communication with the chamber of the stroke by means of radial bypass channel in the cylinder, exhaust ports, made in the side wall of the cylinder, and the working tool shank, and the device has been placed in the cylinder wall from the side of the camera idling still camera afterburner reported accordingly constantly with camera network of air through the throttle channel in the lid, an annular groove and a longitudinal channel in the cylinder, and periodically with the camera idling through the radial channel of the afterburner in the cylinder wall, the distance from tsechen the th edge of the slice channel of the afterburner to the exhaust channel is made smaller length drummer, and the glass is made with an annular flange resting on the flange of the cover.

The drawing shows a pneumatic percussion with a partial longitudinal section with stagnant camera afterburner.

Pneumatic percussion with butterfly distribution (see drawing) includes a hollow cylinder 1 holds drummer 2, which separates the cavity of the cylinder chamber 3 working and idle 4-stroke, side camera 3 cylinder is blocked by a cover 5 with a Central opening 6 for the passage of the tube 7 with the throttle channel 8 start into the chamber 4. Cover 5 provided with a flanged collar 9 and the sealing flange 10, by means of which it rests on the end face 11 of the cylinder 1 and the glass 12, which is provided with an annular shoulder 13 facing the flange 10. The cover 5 is also equipped with inlet ring orifice 14 of the inlet into the chamber 3 formed on the side surfaces of the hole 6 and the tube 7 in the form of a gap. The Cup 12 uplatnena and Rethimno, such as by threaded connection, attached to the cylinder 1 and provided with a channel 15 from removable vozduhoprovodyaschih device 16 include a compressed air supply of any known type. Between the Cup 12 and lid 5 is formed by the camera 17 a network of air. The inner side surface of the glass 12, the flange 10 of the cover 5 and the outer side surface of the form cylinder 1 ACC is emulational chamber 18 is constantly communicated with the chamber 3 through a radial bypass channel 19. The cylinder 1 is supplied from the camera 4 ring still camera 20 afterburner, periodically communicating through radial afterburner channel 21 in the cylinder chamber 4. Radial outlet channel 22 that is installed vozduhoobmenu ring 23 with an outlet channel, for example, in the form of a slit 24. The chamber 17 and the chamber 4 is communicated continuously between an open canal system: a longitudinal throttle channel 25 in the cover 5, the annular channel 26 on the end of cylinder 1 (or cover 5), the longitudinal channel 27 in the cylinder wall. Between the ring 23 and the cylinder 1 is formed exhaust chamber 28. The shank 29 of the working instrument 30 is installed in the cylinder from the chamber 4 and is held from falling out of the device to hold it in place, for example in the form of rubber-metal cap 31, is fixed Rethimno relative to the barrel by a screw or other known connection.

Pneumatic percussion with throttle distribution works as follows.

When power supply compressed air flows through the channel 15 in the Cup 12 into the chamber 17 a network of air. From the chamber 17 network air enters the chamber 3 of the stroke ring on the throttle channel 14. At the same time from the camera 17 network air enters the chamber 4 idle on the throttle channel 8 in t is ubke 7, and still camera 20 afterburner through a constantly open channel system: longitudinal throttle channel 25, the annular channel 26 and the longitudinal channel 27.

As movement of the striker 2, the pressure in the chamber 4 of idling will be reduced. This is due to the rapidly increasing volume of the chamber 4 at idle, and it doesn't have time to fill network air coming from the chamber 17 through the throttle channel 8 run in the tube 7.

Upon further movement of the striker 2, the side surface of the open afterburner channel 21, and accumulated in stagnant chamber 20 afterburner air sharply fill volume of the chamber 4, which will significantly increase the pressure pulse of air at idle and the speed of movement of the striker.

Upon further movement of the striker 2, the side surface of the open exhaust ports 22. Since the exhaust air from the chamber 4 takes place through the exhaust channel of the specified bore, a sharp reduction in air pressure in the chambers 4 and 20 will not occur, and the pressure in the chamber 4 will be maintained by the settlement.

At the same time in the chamber 3 of the stroke and is in communication with the chamber 18 through channel 19 will begin the process of compressing air, clipped them, and air network, again coming from the chamber 17 through the annular orifice channel 14 of the inlet.

After opening the iron surface drummer 2 with the outlet 22 and a subsequent movement of the air pressure in chamber 4 is idling and communicated with her still camera 20 afterburner gradually reduced to atmospheric values. Under the influence of the difference in the pulse pressure of the air in the chambers 3 and 4 drummer 2 will slow down their movement. Moving under the action of pulse pressure air from the chamber 4 through a pressure-side camera 3, the drummer continues to compress the air in the chamber 3 and is communicated through channel 19 with the chamber 18, including the air coming from the chamber 17 through the annular channel 14. When the alignment of the power pulses acting on the drummer from cameras 3 and 4, it will stop at the clearing point. Immediately under the action of the pressure pulse of air from the chamber 3, the drummer will begin to rapidly move in the direction of the shank 29, making the stroke. In the end of the blank and the beginning of the working stroke of the striker, the pressure in the chambers 4 and 20 will remain almost equal to atmospheric, as the outlet channel 22 has a square bore, substantially exceeding the area of the channel 27 of the intake and throttle 8 run in the tube 7.

Subsequent movement of the striker 2 will block its lateral surface of the outlet channel 22, which will begin increasing the air pressure is cut off in the chambers 4 and 20, and air is again injected into these chambers through the orifice 8 run in the tube 7 and through the throttle channel 27 of the inlet.

Subsequent movement of the striker 2 will overlap the force is iny channel 21 and due to the leakage of air from the chamber 17 through the channel 27, the air pressure in the enclosed chamber 20 afterburner will begin to rise to the level of the network. After the opening of the firing channel 22, the air pressure in the chamber 3 of the stroke and is in communication with the chamber 18 through channel 19 will be reduced to the atmospheric pressure, despite the receipt of a network of air through the annular orifice channel 14 of the inlet from the chamber 17, as the flow area of the exhaust channel 22 is substantially greater flow area of the channel 14. Thus, the exhaust air from the chambers 3 and 18 is produced in the discharge chamber 28 and through the slotted channel 24 in vozduhoobmenu ring 23 into the atmosphere.

As committed by the drummer of the stroke the air pressure in the chamber 4 and communicated with her through afterburner channel 21 of the camera 20 will increase. Subsequent overlapping drummer 2 afterburner channel 21 of the chamber 4 and the chamber 20 becomes disconnected, and the air pressure in the chamber 20 will begin to rise to the level of the network through its leakage from the chamber 17 through an open channel system: longitudinal channel 25 in the cover 5, the annular channel 26 and the longitudinal channel 27 in the cylinder. However, the increased pressure of the air in the chamber 20 will not affect the increase in back pressure of the air in the chamber 4, as they are separated. Under the action of the difference in pulse pressure in the chambers 3 and 4 drummer 2 strikes the shank 29 of the tool 30, and described the working process will be repeated with the only difference that the following is idling drummer will be formed with the participation of the momentum of the rebound of the striker from the shank of the tool.

Execution throttle channel inlet 25 calibrated helps to ensure the rated air pressure in the enclosed chamber 20 afterburner at the blocked channel 21 afterburner drummer 2, and when the camera 4 with the atmosphere through channel 22 air flow calibrated intake channel 25 and channel 8 launch will not exceed estimated. The above enabled without increasing the total air flow, through the implementation of boost at idle with the side of the chamber 4, in conjunction with the placement of the afterburner channel 21 with respect to the channel 22 release in the wall of the cylinder 1 with a length not exceeding the length of the striker 2 to reduce the pressure in the chamber 4 by reducing the flow area of the channel 8 run in the tube 7, by redirecting the reduced portion of the stagnant air chamber 20 of the afterburner through the throttle channel 25 of the inlet. Reducing back pressure in the chamber 4 will also increase the length of the plot of acceleration at idle without increasing the cycle time, because the speed of the striker is increased, and the time of idling it will decrease due to the action of a pulse of the afterburner, which will increase the area of acceleration when working stroke without increasing his time, namely the increase of the shock power of a pneumatic percussion with butterfly distribution and final accounts the e efficiency impact on the processed medium.

Pneumatic percussion with butterfly distribution, including the camera network control, a device enabling the compressed air network of air, a hollow cylinder, placed in it the drummer, dividing the cylinder chamber on the camera idle and working strokes, mounted on one end of the cylinder side chamber stroke the cover flange, on which rests a glass of education of the camera network of air between its bottom and a lid installed in the hole of the cover tube with open into the chamber idling intake throttle channel connecting the camera network air chamber idling, the annular orifice channel inlet in the camera of the stroke, formed between the side surface of the tube and the hole in the lid, the accumulation chamber constantly in communication with the chamber of the stroke by means of radial bypass channel in the cylinder, exhaust ports, made in the side wall of the cylinder, and the working tool shank, characterized in that the device has been placed in the cylinder wall from the side of the camera idling still camera afterburner reported accordingly constantly with camera network of air through the throttle channel in the lid, an annular groove and a longitudinal Cana is in the cylinder, and periodically with camera idling through the radial channel of the afterburner in the cylinder wall, the distance from the trimmed edge of the slice channel of the afterburner to the exhaust channel is made smaller length of the striker, and the glass is made with an annular flange resting on the flange of the cover.



 

Same patents:

FIELD: percussion mining and construction machines, particularly methods or devices for dislodging with or without loading.

SUBSTANCE: device comprises supply-line air chamber, switching device, which initiates compressed air delivery to supply-line air chamber, hollow cylinder, striker, which divides cylinder interior into idle and working stroke chambers and accumulation chamber permanently communicated with working stroke chamber thorough bypass channel. Device also has lid installed at cylinder end from working stroke chamber side and permanently opened inlet throttle channel communicated with idle stroke chamber. Device comprises discharge channel made in cylinder wall and working tool with stem, as well as cup with bottom facing the lid and provided with annular rim supported by rim made in the lid to create supply-line air chamber. Blind augmenter is located in cylinder wall from idle stroke chamber side. The augmenter is permanently communicated with supply-line air chamber by means throttle channel made in lid, annular groove and longitudinal channel of the cylinder. The augmenter periodically communicates with idle stroke chamber by means of radial augment channel made in cylinder. Striker has annular groove and is provided with starting throttle channel. Distance between distributing augment channel edge section and discharge channel is less than striker travel.

EFFECT: increased impact force to be applied to substance to be worked.

6 cl, 5 dwg

FIELD: percussion mining and construction machines, particularly methods or devices for dislodging with or without loading.

SUBSTANCE: device comprises supply-line air chamber, switching device, which initiates compressed air delivery to supply-line air chamber, hollow cylinder, striker, which divides cylinder interior into idle and working stroke chambers and accumulation chamber permanently communicated with working stroke chamber thorough bypass channel. Device also has lid installed at cylinder end from working stroke chamber side and permanently opened inlet throttle channel communicated with idle stroke chamber and starting throttle channel permanently opened in idle stroke chamber and connecting supply-line air chamber with idle stroke chamber. Device comprises discharge channel made in cylinder wall and working tool with stem, as well as cup with rim and blind augmenter located in cylinder wall from idle stroke chamber side. The blind augmenter is permanently communicated with supply-line air chamber via throttle channel made in lid. The blind augmenter is periodically connected with idle stroke chamber through radial augment channel made in cylinder wall. Distance between distributing augment channel edge section and discharge channel is less than striker travel. Cup has bottom facing the lid and is provided with annular rim supported by rim made in the lid to create supply-line air chamber.

EFFECT: increased impact force to be applied to substance to be worked.

1 dwg

FIELD: mining industry, possible use for creating cracks to extract valuable crystalline resources and natural stone, removing blockages and structures, splitting of lumps.

SUBSTANCE: device includes cylindrical body with axial aperture and plunger inserted into aforementioned aperture. Cylindrical body is made in form of a barrel, and plunger is mounted with possible longitudinal movement up to a stop against barrel bottom. Circular shelf is made on the end of plunger. A ring is pinned onto plunger, ring having internal diameter less than diameter of circular shelf, and is held on open end of barrel. Load is held on the end of plunger free of barrel, for example, metallic cylinder with handles. A spring is pinned onto plunger between load and ring.

EFFECT: increased efficiency of device operation due to increased impact load without additional equipment, expanded area of possible use due to possible creation of directional crack without well drilling.

3 cl, 2 dwg

FIELD: mining and building, particularly to drive rod members in ground by applying percussion action thereto, to break oversized items and to destruct old building structures.

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1 dwg

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EFFECT: simplified device structure along with reduced mass and size thereof, improved manufacturability and increased convenience of hydrowedge device usage.

7 cl, 2 dwg

FIELD: methods or devices for dislodging by wedges, particularly downhole and blast-hole rock-cutting means.

SUBSTANCE: hydrowedge device drive comprises body made as hydraulic cylinder 1 provided with through orifice 6 made in central part thereof. Wedge device installed inside body includes transversal wedge 2 located inside central part of hydraulic cylinder 1 and provided with two working chambers and two pistons 3, 4 connected to ends of transversal wedge 2 with through longitudinal vertical orifice 5. Lower working surface 19 of wedge may cooperate with support 17 of the hydrowedge device. The support is installed in lower part of through vertical orifice 6 made in hydraulic cylinder 1. Working surfaces of pistons 3, 4 are transversal to hydraulic cylinder 1 axis 9. Direction of piston 3, 4 force application to transversal wedge 2 coincides with hydraulic cylinder 1 axis 8. Upper working plane 24 of transversal wedge 2 is transversal to orifice 6 axis and may cooperate with compensating nut 22 of hydrowedge device arranged in upper part of through vertical orifice 6. Vertical orifice 6 axis extends at 90°+α angle to axis 9 of the hydraulic cylinder 1 from the side of large wedge 2 base. Here α is angle between upper working surface 24 of transversal wedge 2 and axis 9 of the hydraulic cylinder 1. Friction surfaces are treated to provide antifriction properties thereof.

EFFECT: simplified device structure along with reduced mass and size thereof and increased convenience of hydrowedge device usage.

7 cl, 2 dwg

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SUBSTANCE: hydrowedge device drive comprises body 3 made as fixed cylinder provided with through orifice 10 made in central part thereof. Wedge device is installed inside body 3. The wedge device includes transversal wedge 8 with through vertical orifice 9 connected with two pistons 6, 7. Lower working surface 21 of the wedge may cooperate with support 19 of hydrowedge device located in lower part of through vertical orifice 10 made in the body 3. Working surfaces of pistons 6, 7 are transversal to fixed cylinder 3 axis 11 and direction of force to be applied by pistons 6, 7 to transversal wedge coincides with wedge axis. Drive is provided with two fixed hydraulic cylinders coaxially connected with each other and with body 3. Pistons 6, 7 are located in hydraulic cylinders 1, 2 and connected with transversal wedge by means of rods 4, 5. Upper working surface 26 of the wedge is transversal to axis of through vertical orifice 10 made in body 3 and may cooperate with compensating nut 22 of hydrowedge device. The compensating nut is arranged in upper part of through vertical orifice 10. Vertical orifice 10 axis extends at 90°+α angle to axis 11 of the body 3 and hydraulic cylinders 1, 2 from the side of large wedge 8 base. Here α is angle between upper working surface 26 of transversal wedge 8 and axis 11 of the body 3 and hydraulic cylinders 1, 2. Friction surfaces of the body 3 are treated to provide antifriction properties thereof.

EFFECT: simplified device structure along with reduced mass and size thereof, improved manufacturability and increased convenience of hydrowedge device usage.

7 cl, 2 dwg

Pile driving hammer // 2294432

FIELD: percussion equipment for mining, construction and other industries.

SUBSTANCE: pile driving hammer comprises body and cylindrical striker slidably arranged in the body and connected to lower end of pulling tool. The striker has striker position sensors. Pile driving hammer also has compression chamber, anvil block, driving mechanism including drive with half-coupling connected to the drive, change speed gearbox, main gear, braking mechanism and control systems, which operates braking mechanism and pile driving hammer. Braking mechanism consists of braking hydraulic cylinder, inner and outer braking drums connected with each other by means of brake linings. Driving mechanism is provided with cardan shaft connected with gearbox and having differential gear and driving half-axles. Movably put on each driving half-axle is slidable hollow bush with inner braking drum arranged from the side of outer braking drum and with driving shaft having gear-wheels located from sides thereof. Gear wheel is put on central part of slidable hollow bush between bearing assemblies. The gear wheel is connected to drive shaft gear wheel having greater number of teeth. Vacuum chamber is located in lower body part under cylindrical striker. Pulling tool is of band type and fastened to central part of driving shaft. Slidable hollow bush with braking drum is connected to hammer and to driving motor or combustion engine control system through braking hydraulic system and flexible hydraulic hose. Driving mechanism body is provided with cantledge.

EFFECT: increased efficiency.

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Spacing device // 2293181

FIELD: mining.

SUBSTANCE: device comprises flexible shell provided with face members and filled with the plastic material and metallic strips mounted on the outer surface of the shell. The strips overlap each other, and the ends of the strips are rigidly interconnected to define a tube. The bushings are fit on the both ends of the pipe and are provided with the inner thread. The connecting pipes with adapters for the connection with the hydraulic system are screwed in the bushings. The flexible tube passes through the plastic material and connecting pipes and is pressed to the faces of the connecting pipes by the adapters from both of the ends. The metallic strips that define the internal surface of the pipe are made so that their cross-section is shaped into a circle segment whose arc faces the axis of the device.

EFFECT: enhanced efficiency.

1 cl, 3 dwg

Percussion device // 2291299

FIELD: engineering of percussion devices meant for destroying, crushing and pressing rocks and other rock-like materials; possible use, for example, in mining industry as replaceable rigging on excavators, tractors and other similar machines.

SUBSTANCE: percussion device contains body, along the axis of which striker piston with circular shelf is positioned, together with body forming idle running chamber connected constantly to source of working liquid under pressure and piston hydro-pneumatic accumulator as well as working stroke chamber with circular braking hollows located in its end walls having diameter same as circular shelf of striker, connected in turns to draining or forcing lines through slide valve distributor. Slide valve distributor is made in form of a coaxial three-stepped bushing enveloping the striker piston, and is located in working stroke chamber, in each end wall of which except for braking hollow one circular control hollow is made, enveloping it from outside, closest one of which to idle running chamber is connected to braking hollow enveloped by it, and other one, positioned on opposite end wall of working stroke chamber, by means of pilot slide valve is connected in turns to either force line or working stroke chamber. Plunger of pilot slide valve is made in form of piston with rod, positioned in end wall of piston hydro-pneumatic accumulator on the side of its liquid hollow and together with aforementioned wall it forms piston hollow, connected to force line, and rod hollow, connected to draining line, while the rod of aforementioned plunger by its free end is constantly positioned in liquid hollow of hydro-pneumo-accumulator and is in contact with the end of its piston directed to the inside of this hollow.

EFFECT: simplified operation of device and increased reliability of same.

3 cl, 1 dwg

FIELD: percussion mining and construction machines, particularly methods or devices for dislodging with or without loading.

SUBSTANCE: device comprises supply-line air chamber, switching device, which initiates compressed air delivery to supply-line air chamber, hollow cylinder, striker, which divides cylinder interior into idle and working stroke chambers and accumulation chamber permanently communicated with working stroke chamber thorough bypass channel. Device also has lid installed at cylinder end from working stroke chamber side and permanently opened inlet throttle channel communicated with idle stroke chamber. Device comprises discharge channel made in cylinder wall and working tool with stem, as well as cup with bottom facing the lid and provided with annular rim supported by rim made in the lid to create supply-line air chamber. Blind augmenter is located in cylinder wall from idle stroke chamber side. The augmenter is permanently communicated with supply-line air chamber by means throttle channel made in lid, annular groove and longitudinal channel of the cylinder. The augmenter periodically communicates with idle stroke chamber by means of radial augment channel made in cylinder. Striker has annular groove and is provided with starting throttle channel. Distance between distributing augment channel edge section and discharge channel is less than striker travel.

EFFECT: increased impact force to be applied to substance to be worked.

6 cl, 5 dwg

FIELD: percussion mining and construction machines, particularly methods or devices for dislodging with or without loading.

SUBSTANCE: device comprises supply-line air chamber, switching device, which initiates compressed air delivery to supply-line air chamber, hollow cylinder, striker, which divides cylinder interior into idle and working stroke chambers and accumulation chamber permanently communicated with working stroke chamber thorough bypass channel. Device also has lid installed at cylinder end from working stroke chamber side and permanently opened inlet throttle channel communicated with idle stroke chamber and starting throttle channel permanently opened in idle stroke chamber and connecting supply-line air chamber with idle stroke chamber. Device comprises discharge channel made in cylinder wall and working tool with stem, as well as cup with rim and blind augmenter located in cylinder wall from idle stroke chamber side. The blind augmenter is permanently communicated with supply-line air chamber via throttle channel made in lid. The blind augmenter is periodically connected with idle stroke chamber through radial augment channel made in cylinder wall. Distance between distributing augment channel edge section and discharge channel is less than striker travel. Cup has bottom facing the lid and is provided with annular rim supported by rim made in the lid to create supply-line air chamber.

EFFECT: increased impact force to be applied to substance to be worked.

1 dwg

Impact mechanism // 2286226

FIELD: plastic metal working; impact-type mechanisms for stamping, riveting and striking the gates.

SUBSTANCE: proposed impact mechanism has power cylinder with working and idle stroke cavities where piston-striker is arranged. Piston is provided with two rods. Working tool is secured on one of rods. Cross-sectional area of second rod exceeds that of rod provided with working tool. Impact mechanism includes receiver which is connected with compressed air source at all times and is brought in communication with working stroke cavity of power cylinder. Impact mechanism is also provided with distributor made in form of electrically- and pneumatically-controlled two-position three-line spool valve. Receiver is provided with passages and power cylinder has holes for connection with these passages; these holes are made in side wall of cylinder sleeve and are closed by piston-striker at moment when it returns to initial position.

EFFECT: increased impact energy.

3 cl, 1 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

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

The invention relates to the mining industry and construction, in particular for pneumatic machines percussion

The invention relates to mechanical engineering and can be used in the production of impact machines

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

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

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