Pneumatic impact mechanism
|
Method for destruction of solid bodies / 2457328 Method includes arrangement of charges in bore pits and excitation of exothermic reaction without explosion by device initiating its inflammation. The charge is a mixture of the following components with the specified proportion, wt %: aluminium or magnesium or alloys based on them - 20.0-32.0; metal oxide or mixture of metal oxides - 64.0-75.0; phenolic-formaldehyde resin or its solutions; or butadiene-nitrile rubber or its solutions; or aqueous solutions silicates - 3.0-6.0. |
 Method for development of wells and workings in rocks / 2457311Method includes destruction of rocks at face by impact of power tool and jets of working agent running out under pressure, removal of drilling mud to the well head by working gaseous agent reflected from the face. Face area is influenced with working gas agent under its temperature 700-900°C, agent jet pressure on the face 3-10 kgf/cm2 during 1-2 minutes upon simultaneous appliance of acoustic vibrations from operating agent and drilling unit heads on these jets and creating the conditions for sections change-over on the face; by means of such influence 5-10 mm of rock layer are weakened breaking its thermal and mechanical inertia; cooling agent is supplied to preheated face by short-time pulse during 1-3 sec with pressure 10-70 kgf/cm2 in the form of carbonic acid or mixture of water with carbonic acid, form network of fractures or tiny fractures in this layer, upon impulse action on the face by working gas agent under pressure 50-100 kgf/cm2 and temperature 600-800°C cooling agent residuals are vapourised, destroyed rock is removed from the face, constant upstream of drilling mud to the well head is created, choosing its lifting speed within 20-60 m/sec due to control of quantity from 2 to 9 m3/sec of gas flow supplied from thermo-gas generator to the part of working heads of drilling unit; after that the activities specified are repeated in the same sequence. |
 Pneumatic device of impact action to form wells in soil / 2455445Device comprises a hollow body with a stepless striker having a central through hole separating the body cavity into working and idle chambers, a central tube interacting with the central through channel of the striker, a bushing with a permanently open inlet channel and a hose to supply compressed air from a network, a cover with a hole to let through the central tube, a prechamber of network air, a tail entering the idle chamber, the tail and the bushing are arranged with through channels to let through the central tube sealed and fixed relative to the tail and the bushing, in the central tube there is an additional tube installed coaxially with a circular gap with a radial outlet channel and with fixation along its ends relative to the central tube. In the additional tube there are slots sealed and coupled with the surface of the central tube, forming at the same time a separately longitudinal throttling channel of air inlet into the idle chamber, and an air outlet channel from working and idle chambers, besides, the longitudinal throttling channel at the side of the idle chamber and the prechamber is equipped with radial channels in the central tube. |
 Electro-mechanical converter for impact machines / 2454777Electro-mechanical converter includes asynchronous linear cylindrical engine (ALCE) of alternating current in the stator housing 1 of which there located are stator coils 2. The housing 1 is connected to the housing 11 of linear cylindrical engine (LCE) of direct current. The armatures of the said engines are united with the possibility of adjusting the acceleration of the formed common armature and its reciprocating movement within the limits coaxially the stator 2 coils in slider bearings 5 of ALCE, slider bearings 10, 71 of LCE. Common armature is equipped with stabilisation means preventing its turning about axis. LCE is performed in a form of accelerator and serves for providing a necessary speed to the common armature in the end of working stroke. |
 Downhole device for formation of directed crevasses / 2454539Device includes pipe, spacing ring with slot edged in outside circumferential direction and sealer installed on pipe end in series. End of pipe is provided with cone expansion. In the pipe there are forcer and sleeve installed connected to the pipe by threaded connection. Between forcer and sleeve a spring is located. The sleeve is provided with bar to rotate. |
 Perforator / 2453420Invention relates to percussion tools, namely, to perforators. Proposed perforator comprises case, tool holder with bit, motor arranged behind tool holder and perpendicular to its axis, percussion mechanism and coupling mechanism. Reducing shaft is arranged in parallel with output shaft between that latter and tool holder. Reducing shaft has driven gear and herring-bone gear. Driven gear get in mesh with motor shaft while herring-bone gear engages with tool holder. Coupling pin is arranged in reducing shaft to slide along its axis. Coupling mechanism allow selecting drilling and perforator modes. Driven gear and reducing shaft are disengaged by said pin. Said pin passes through reducing shaft to engage with coupling section arranged on tool holder side and to lock tool holder. In perforator mode, selection may be made between neutral position whereat coupling pin is not engaged with coupling section, and locking position whereat said pin is engaged with coupling section to lock tool holder. |
 Hydraulic rock breaker / 2449882Invention relates to percussion tools, namely, hydraulic rock breakers. Proposed device comprises one-piece case with piston and piston rod, moving hammer, working tool and pressure conversion piston. Gas chamber is arranged between case, pressure conversion piston and hammer. Pressure conversion cylinder and compensation chamber are arranged between pressure conversion piston and piston rod. Connection channel is made between gas and compensation chambers. |
 Method to drill wells using laser energy and device for its realisation / 2449106Group of inventions relates to mining industry and may be used to drill wells in loose rocks with simultaneous reinforcement of well walls. The method includes thermal softening and melting of a rock massif with subsequent formation and strengthening of well walls with axial feed of a drill string. Thermal softening of rocks and melting of rock mass in well walls is carried out by means of impact from a high-temperature penetrator, heated by laser beams focused on inner walls and the end part of the penetrator, to the temperature that exceeds temperature of rock melting by 200-250°. The device comprises a source of thermal energy, a hoist, a load-carrying cable, a high-temperature penetrator, a shaping crystalliser, a centraliser. The source of thermal energy is a laser connected via a current collector, a centraliser and a weighting agent by means of a fibre optic cable to a laser head placed inside the pipe cavity. The upper end part of the high-temperature penetrator body is rigidly connected to the pipe via the shaping crystalliser equipped with a well expander, freely installed on the external surface of the shaping crystalliser, and the external surface of the penetrator is formed by rotation of a chain line around the vertical axis. |
 Electropulse drilling rig / 2445430Rig comprises several parallel drilling assemblies installed on a rotary platform 1 and equipped with a common drilling string 2, and every of which comprises the following serially connected components: a submerged charging device 3, a submerged source of high-voltage pulses 4, a high-voltage input 20 and a drilling tip representing a comb 5 with grounded electrodes 6 and a comb 7 with high-voltage electrodes 8. In the centre of the platform 1 (at the side of the bottomhole) there is a support grounded electrode 9 fixed. In order to increase efficiency of drilling, on the platform 1 there are sludge pumps 10 installed, and downstream their slot nozzles 13 at the bottom there are rock-breaking elements fixed with reinforced cutters to the platform 1, bottomhole ends of grounded electrodes 6 and high-voltage ones 8 are bent towards the side that is reverse to the direction of rotation of a drilling assembly, high-voltage electrodes 8 are equipped with insulation coatings. |
 Percussion device / 2444623Device includes a striker made in the form of two-stage cylinder in coaxial bore of larger stage of which there arranged is fixed stock with a piston, which is rigidly fixed in upper blind cover of pipe and forming together with striker a hydraulic cylinder the piston cavity of which is constantly interconnected through one channel in the stock with drain line, and stock cavity of hydraulic cylinder is interconnected from time to time via another channel in the stock through a working valve to pressure line of hydraulic system or to piston cavity. Leak-proof cavity between upper edge of the striker and the above blind cover of the pipe is constantly interconnected through radial holes in side pipe wall with insulated annular cavity of the specified volume, which envelopes the pipe. On inner side surface of upper chamber of tip there formed is annular projection which is equipped on side surface with annular groove with through radial holes, which mates the side surface of medium stage on lower pipe end near extreme lower position of the tip, thus isolating lower chamber of tip from inner cavity of the latter. Reliability and efficiency of the device is improved at simultaneous reduction of the weight and sizes of hammer. |
 Air impact mechanism / 2418146Air impact mechanism consists of cylinder case with outlet channels and installed in it bushing and of stepped striker with rod and main parts, with through orifice and bushing in rod part with channel-slot dividing cavity of case to chamber of idle run on side of shank end and circular working chamber. Further, the mechanism consists of a circular flange with channels supplying air from a network camera, of the rod rigidly secured relative to the circular flange and continuously inserted in a through orifice of the striker and interacting with the channel-slot of the bushing and of a working tool with the shank end. The impact mechanism has a circular distributing chamber on one side communicated with the network camera by means of air supplying channels of the circular flange and on another side continuously communicated with the circular chamber of working stroke by means of a circular throttle channel formed with a bushing of the impact mechanism and a rod part of the striker. Also, the rod is alternately communicated depending on position between the stepped striker of the circular distributing chamber and the idle stroke chamber. |
 Device for making wells in soil / 2389856Device for making wells in soil includes body, anvil, striker, tail, accessories for air relief in process of direct and reverse travel of pneumatic drill and fixation of hose. Along anvil axis there is a channel arranged, besides the end of anvil near bottomhole is directly plugged, and channel communicates to adjacent layers of soil with the help of one ore several holes in side part of anvil. |
 Impact device / 2351729Proposed here is an impact device for a bore hammer or similar device, with apparatus for transferring impact load or tension impulse to an instrument, linked to the impact device. The apparatus for transferring the tension impulse comprises striking element (2), fixed to housing (1a) of the impact device, and apparatus for applying tension on the striking element and, respectively, for sudden release of tension from striking element (2), after which the strain energy is released in form of a tension impulse, directed to instrument (3), which is directly or indirectly joined to the striking element. |
 Perforator / 2296850Invention can be used for drilling bore holes in any rocks with hard inclusions, for instance, apatite nepheline ore. Proposed perforator contains rock breaking tool-bar with crow bit, housing accommodating rotary mechanism and twin hammer consisting of main and auxiliary strikers, air distributing system, rotary and end boxes. Auxiliary striker is installed in guides. Its section has from of polyhedron, and ratio of striker length L to its width b is chosen from L/b>1.5. Ratio of masses of twin hammer and bar should satisfy condition m2>m1(2R+R2). |
|
Pneumatic device of impact action to form wells in soil / 2455445 Device comprises a hollow body with a stepless striker having a central through hole separating the body cavity into working and idle chambers, a central tube interacting with the central through channel of the striker, a bushing with a permanently open inlet channel and a hose to supply compressed air from a network, a cover with a hole to let through the central tube, a prechamber of network air, a tail entering the idle chamber, the tail and the bushing are arranged with through channels to let through the central tube sealed and fixed relative to the tail and the bushing, in the central tube there is an additional tube installed coaxially with a circular gap with a radial outlet channel and with fixation along its ends relative to the central tube. In the additional tube there are slots sealed and coupled with the surface of the central tube, forming at the same time a separately longitudinal throttling channel of air inlet into the idle chamber, and an air outlet channel from working and idle chambers, besides, the longitudinal throttling channel at the side of the idle chamber and the prechamber is equipped with radial channels in the central tube. |
|
Air impact mechanism / 2418146 Air impact mechanism consists of cylinder case with outlet channels and installed in it bushing and of stepped striker with rod and main parts, with through orifice and bushing in rod part with channel-slot dividing cavity of case to chamber of idle run on side of shank end and circular working chamber. Further, the mechanism consists of a circular flange with channels supplying air from a network camera, of the rod rigidly secured relative to the circular flange and continuously inserted in a through orifice of the striker and interacting with the channel-slot of the bushing and of a working tool with the shank end. The impact mechanism has a circular distributing chamber on one side communicated with the network camera by means of air supplying channels of the circular flange and on another side continuously communicated with the circular chamber of working stroke by means of a circular throttle channel formed with a bushing of the impact mechanism and a rod part of the striker. Also, the rod is alternately communicated depending on position between the stepped striker of the circular distributing chamber and the idle stroke chamber. |
 Pneumatic impact-action device for development of well in soil / 2393316Device includes hollow housing with longitudinal throttle channel, stepless hammer arranged in the housing and having central through channel dividing the housing cavity into operating and no-load stroke chambers, central tube interacting with central through channel of hammer, threaded sleeve with constant open inlet channel and hose for supply of compressed air from network; cover with peripheral channel, radial bypass channel and through central hole for passage of the tube; pre-chamber of network air, which is formed between threaded sleeve and cover and interconnected via peripheral channel and longitudinal throttle channel to idle stroke chamber; shank and threaded sleeve, which are provided with through channels for passage of central tube installed in central hole of cover with an annular gap forming an annular throttle inlet channel of working stroke chamber. In central tube there installed coaxially with annular gap is additional tube with radial outlet channel and with fixation along its edges relative to central tube; at that, radial outlet channel in additional tube is made at acute angle to its axis with the top on the threaded sleeve side, and is offset along screw line relative to radial outlet channel of central tubes towards threaded sleeve. Additional tube protects central tube against possible deformations which appear on the side of ropes, chains, etc. of rigid elements, which are passed through the device, as well as soil particles, and which lead to jamming of the hammer and shutdown of the device operation. |
|
Device for making wells in soil / 2389856 Device for making wells in soil includes body, anvil, striker, tail, accessories for air relief in process of direct and reverse travel of pneumatic drill and fixation of hose. Along anvil axis there is a channel arranged, besides the end of anvil near bottomhole is directly plugged, and channel communicates to adjacent layers of soil with the help of one ore several holes in side part of anvil. |
 Pneumatic perforator / 2345882Proposed perforator comprises a casing with an air feed inlet, cylinder communicating with the aforesaid inlet via an appropriate system of air ducts, impact action piston with at least one part making an interface with the aforesaid cylinder, air flow control appliances and water feed inlet. Note also that the perforator incorporates at least one pair of contact surfaces whereon appropriate parts moving relative each other get into contact. The said impact action piston can reciprocate inside the aforesaid cylinder. The proposed device comprises water channels communicating with the aforesaid water feed inlet, as well as those feeding water or air saturated with water during perforator operation to, at least, aforesaid interface between the impact action piston and the cylinder for wetting that is lubing the said contact surfaces. |
 Air percussion device with throttle air distribution / 2336990Air-operated device incorporates an air line chamber, a hollow cylinder with its side wall furnished with outlet channels, a striker arranged in the said hollow cylinder and dividing it into idling and operating chambers, a cover, a barrel, a pipe with always-open throttle channel and an operating tool. The inlet throttle channel communicates the air line chamber with the idling chamber. A non-through boosting chamber is arranged in the cylinder wall on the idling chamber side. The striker is furnished with inner and outer chambers-grooves representing an alternating ledges and recesses their outline being formed by straight or curvilinear lines and with a bypass channel for the inner and outer chambers-grooves to intercommunicate. The aforesaid pipe side surface is furnished with a radial channel representing a vertical slot to intermittently communicate the said chambers-grooves in the striker with the pipe inlet throttle channel. The latter incorporates a cut-in channel-throttle arranged on the tool side. |
 Air hammer with throttle air distribution / 2336989Air hammer incorporates a hollow cylinder, a striker with a central channel arranged inside the aforesaid hollow cylinder and dividing it into idling and operating stroke chambers, a movable pipe with an always-open inlet throttle channel, a thrust collar and a step, a cover with a collar and a hole, the cylinder barrel and working tool. The movable pipe passes through the striker central channel to communicate the air line chamber with the idling chamber via the aforesaid always-open inlet throttle channel. The movable pipe thrust collar represents an annular barrel with a limiting annular collar resting on the cover. An circular boosting chamber is formed between the cylinder barrel side surface and the cover collar. The annular barrel is furnished with one or several through throttle channels with a designed flow section. The cylinder walls are provided with the boosting radial channels communicating the annular boosting chamber with the idling chamber. The cover collar incorporates a throttle channel intercommunicating permanently the air line and boosting chambers. |
FIELD: construction.
SUBSTANCE: pneumatic impact mechanism comprises a cylinder with outlet channels, a working tool with a tail, a stepped striker with a stem and a main parts with a central through channel and a bushing with a slot channel in the stem part of the striker, separating the cylinder cavity into an idle chamber at the tail side, a distribution chamber at the side of the stem part of the striker, a circular chamber of a forward stroke, a network air chamber, a circular cover installed between the network air chamber and the distribution chamber with a channel of air supply from the network air chamber into the distribution chamber, a rod rigidly fixed relative to the cover with a piston part, which is permanently installed in a central through channel of the striker, interacting with the slot channel of the bushing, connecting periodically, depending on the position of the stepped striker, the distribution chamber and the idle chamber between each other. The distribution chamber and the circular chamber of the forward stroke are permanently communicated to each other with a circular throttling channel, coaxially to the distribution chamber there is a sleeve installed, forming an additional circular chamber of an attached volume, permanently communicated with a relief channel to the circular chamber.
EFFECT: reduced back pressure of striker braking at an idle moment, reduced recoil force acting at a cylinder.
1 dwg
The invention relates to mechanisms used in machines percussion for various purposes: in the manual hammers, the hammers hinged, machines for strip wells trenchless construction, machines for clogging pipes for municipal purposes related to the field of construction.
Known pneumatic percussion mechanism (see, for example, as the USSR №275931, Ál E21C 3124, 1970)containing a stepped cylinder, a control rod fixed relative to the cylinder, the drummer with the Central channel, periodically communicates with the rod and dividing the stepped cylinder on camera: a network of air from the rod, the intermediate ring of the stroke and idling on the side of the shank of the stroke, the exhaust ports in the cylinder wall for periodic exhaust of air from the annular chamber of the stroke and the camera idling.
Pneumatic percussion mechanism has a drawback: as the closing and opening of the axial bore of the striker rod is sharply with the impact about the mouth of the hole drummer, it causes inhibition of the drummer and degrades the characteristics of the mechanism.
Also known pneumatic percussion mechanism (see, for example, as the USSR №359382, MCL E21C 3/24 1972), comprising a cylinder with inlet and outlet channels, a work tool shank, twenty drummer with a Central through-channel and the sleeve channel - groove rigidly fixed relative to the cover rod that resides in a Central through-channel drummer interacting with the channel groove of the sleeve. Drummer divides the cylinder chamber to the distribution chamber, the atmospheric pressure from the rod side of the drummer and the camera idling on the side of the shank of the working tool. The channel is a groove in the sleeve, when interacting with part of the piston rod, provides the opening and closing of the Central channel of the drummer. On the site of interaction with the rod part of the drummer in the cylinder is installed, the sleeve forming an annular step of limiting the stroke of the striker from the side of the chamber with the atmospheric pressure. Pneumatic percussion mechanism as containing the greatest number of essential features that are included in the proposed technical solution is adopted as a prototype.
The mechanism of the prototype has major drawbacks: the annular chamber formed by the cylinder body and the rod part of the drummer, not involved in the formation of the power pulse of air pressure, which prevents the increase of the impact energy; the execution of the rod portion of the striker shall ensure that the landing installed in the cylinder sleeve, ensuring its alignment with the rod that is almost impossible and, as a rule, leads to bias the rod and increase the resistance forces to the motion of the piston of the rod in the sleeve, inhibition drummer and reduce reliability of the terminal.
Noted disadvantages of the mechanism are eliminated completely or partially, if the site of interaction of ring-stage sleeve cylinder rod portion drummer to perform an annular throttle gap with the estimated reduced cross-section, continuously connecting the ring chamber from the side of the rod portion of the striker with the distribution chamber and coaxial distribution chamber to form an additional annular chambers attached volume, constantly communicated to the bypass channel with the annular chamber.
The essence of the proposed technical solutions pneumatic percussion mechanism is as follows: a pneumatic percussion mechanism comprising a cylinder with the outlet channels, a work tool shank, manual drummer with rod and main parts with a Central through-channel and the sleeve channel-groove in the rod side of the drummer, dividing the cylinder chamber on the camera idling on the side of the shank, the distribution chamber from the side of the rod portion of the striker, the annular chamber of the stroke, the camera network of air, an annular cover disposed between the network camera and air distribution chamber with a channel for supplying air from the chamber network air distribution chamber, restasurant relative cover the rod with the piston part, permanently located in the Central channel drummer interacting with the channel-groove bushing, connecting periodically, depending on the position of the speed of the striker, switch the camera on and the camera idling between them, and distributing chamber and the annular chamber stroke is constantly communicated between an annular throttle channel, coaxial distribution chamber has a glass forming with the cylinder of additional annular chambers attached volume, constantly communicated to the bypass channel with the annular chamber.
The performance of a pneumatic percussion mechanism is illustrated by a drawing (longitudinal section).
Pneumatic percussion mechanism includes a cylinder 1, a stepped drummer 2 with rod part 3 and the main part 4, the Cup 5, which forms with the inner surface of the cylinder, which is the limit of the stroke of the striker, additional annular chambers. Step drummer 2 has a Central channel 6 with radial channels 7 and divides the cavity of the cylinder 1 from the distribution chamber 8 and an additional annular chamber 9 is attached volume is in communication with the annular chamber 10 of the stroke, formed by the cylinder rod part of the striker and the level of the main part 4 of the striker, and the camera 11 idling formed by the cylinder, a drummer and XB is lovecom 12 of the working tool 13, which is held relative to the cylinder, for example, the leaf spring 14 against arbitrary falling out. The Central channel 6 speed drummer 2 through radial channels 7 communicated constantly with the camera 11 of idling. The cylinder 1 is supplied with the opposite shank 12 of the end face of the mounting Cup 15 channel 16 for supplying a compressed air into the chamber 17 a network of air formed mounting Cup 15 and the annular cover 18, in which the channels 19, which connects the constant camera 17 network and air distribution chamber 8 between them. In the annular cover 18 is rigidly fixed, for example, by bolting 20 pin 21 with the piston part 22, interacting constantly with the sleeve 23 mounted in the Central channel 6 speed drummer 2. The hub 23 is provided with longitudinal channels, grooves 24 for periodic messages, depending on the position of the striker 2, the camera 8 and the chamber 11 through the Central channel 6 and the radial channels 7 speed drummer. The annular chamber 10 of the stroke and distributing chamber 8 is communicated constantly with each other through the annular orifice channel 25. The cylinder 1 is equipped with outlet channels 26 and 27 periodically reporting, depending on the position of the speed of the striker 2, the annular chamber 10 of the stroke and the camera 11 idle atmosphere with the purpose of manufacture of exhaust air. The largest possible radial movement of precluding jamming of the piston portion 22 of the rod 21 in the channel 28 of the sleeve 23 and the Central channel 6 speed drummer 2, must be no less possible radial movement of rod part 3 step drummer in the hole of the annular orifice channel 25 formed by the clearance between the rod part 3 step drummer and the Cup 5. Additional annular chamber 9 is attached volume is constantly communicated with the chamber 10 by-pass channel 29.
Pneumatic percussion mechanism works as follows.
After switching the starting device (not shown and may be any known air from network flows through the channel 16 in the Cup 15 into the chamber 17 a network of air. Then through the channels 19 in the annular cover 18 air flows into the distribution chamber 8. From the distribution chamber 8 along the longitudinal channels of the grooves 24 and the channel 28 of the sleeve 23 in the rod part 3 drummer 2 air flows through the Central channel 6 of the striker and its radial channels 7 into the chamber 11 of idling. Simultaneously ring on the throttle channel 25 air from the distribution chamber 8 enters the annular chamber 10 of the stroke and the secondary camera 9 is attached volume connected to the atmosphere through the exhaust channel 26. In the beginning of the movement speed Udarny is and 2 (see the drawing), continues filling the air chamber 11 of idling, providing the estimated magnitude of the impulse idling. Under the action of pulse pressure chamber 11 of idling drummer 2 continues to move in the direction of the distribution chamber 8, making idle. Subsequent movement of the striker 2 overlaps the exhaust channel 26 in the cylinder 1, and the channel 28 and the longitudinal channels-grooves 24 of the sleeve 23 rod part 3 step drummer 2 overlap piston part 22 of the rod 21 and after the opening of the main part 4 with the outlet 27 of the air pressure in the chamber 11 idle speed is adjusted to atmospheric. In the camera 10 of the stroke after uncoupling it from the atmosphere will compress clipped it and coming from the chamber 8 through the annular orifice channel 25 of the air to some calculated values. The pressure in the distribution chamber 8, the camera 10 of the stroke and an additional chamber 9 is attached volume increases under the action of differential pressure pulses acting on the striker 2 from the distribution chamber, the secondary camera is attached volume and camera 11 idling, the drummer is retarded and will stop at the clearing point. Immediately under the action of the pressure pulse of air from the distribution chamber 8 and the chamber 10 of the stroke, and will complement the school camera 9 is attached volume drummer 2 starts to move in the direction of the shank 12 of the working tool 13, making the stroke. At this stage drummer 2 opens the exhaust channel 26 and the additional chamber 9 is attached volume will be communicated with the atmosphere. Next step drummer 2 will block its lateral surface of the outlet channel 27 and opens the channel 28 and the longitudinal channels-grooves 24 of the sleeve 23 in the rod part 3 step drummer, resulting in the camera 11 of idling will compress clipped in her air and air coming through the longitudinal channels of the grooves 24, the channel 28, the Central channel 6 and the radial channels 7 from the distribution chamber 8. After the opening of the outlet channel 26, the pressure in the annular chamber 10 of the stroke and an additional chamber 9 is attached volume will be reduced to atmospheric values.
Since the working area of the main part of the 4-step striker 2 from the camera 11 idling longer end of the square rod portion 3 of the striker, under the influence of a difference of pressure pulses of air from these chambers, the drummer, overcoming the back pressure side of the camera idling, strikes the shank 12 of the tool 13. Under the action of pulses rebound and air pressure from chamber 11 idling drummer 2 starts idling. Then the working cycle of a pneumatic percussion mechanism is repeated.
Pneumatic percussion mechanism comprising a cylinder is with the outlet channels, the working tool shank, manual drummer with rod and main parts with a Central through-channel and the sleeve channel-groove in the rod side of the drummer, dividing the cylinder chamber on the camera idling on the side of the shank, the distribution chamber from the side of the rod portion of the striker, the annular chamber of the stroke, the camera network of air, an annular cover disposed between the network camera and air distribution chamber with a channel for supplying air from the chamber network air distribution chamber, rigidly fixed relative to cover the rod with a piston part that resides in the Central through-channel drummer interacting with the channel-groove bushing, connecting periodically, depending on the position of the speed of the striker, switch the camera on and the camera idling between them, characterized in that the distributing chamber and the annular chamber stroke is constantly communicated between an annular throttle channel, coaxial distribution chamber has a glass forming with the cylinder of additional annular chambers attached volume, constantly communicated to the bypass channel with the annular chamber.