Vibration-resistant percussion-action pneumatic machine

FIELD: machine engineering, namely percussion-action pneumatic machines.

SUBSTANCE: machine includes housing where metallic trunk is arranged; striker arranged in trunk with possibility of axial motion for dividing truck by chambers of forward and back strokes; bushing; mechanism for air distributing; handle; shock absorber of soft elastomer mounted inside handle. Air distributing mechanism has supplying, forward pumping and backward pumping ducts. Protection casing is arranged on housing with annular cavity between them. Trunk has at least three links telescopically mounted with possibility of relative axial motion without mutual striking and cast with impact-resistant elastomer forming housing. Ducts formed in walls of housing are designed for communication with forward-stroke chamber; other ducts are designed for communication at one side with back-stroke chamber and at other side with pumping reverse ducts of air distributing mechanism. Third ducts are designed for communication with said annular cavity. Bushing, air-distributing mechanism, protection casing and handle are made of impact-resistant different rigidity elastomer.

EFFECT: improved design providing vibration resistance, lowered noise level, enhanced operational efficiency, lowered mass of machine.

3 cl, 3 dwg

 

The invention relates to the field of engineering, more specifically to pneumatic machines percussion, which are used in construction, energy, utilities, etc. for processing concrete structures, the destruction of the semi-bedrocks, hard and frozen ground.

Known pneumatic machines, such as betonolom containing barrel in the form of two pipes external and internal, the gap between them filled with an elastic material so that the cavity between the pipe ducts are to return the firing pin in the upper position connecting the back-stroke chamber with the inlet channel (1).

The disadvantage of it is that the inner pipe, in which peremeshautsa drummer, whole, vibration from jet hit the working tool is immediately transmitted to the metal on the handle and it has a whole range of octave frequency vibration, in addition, the outer pipe running out of phase, which increases the tearing force in the elastic material between the inner and outer pipe.

Also known pneumatic hammer comprising a metal barrel moving in with him drummer and housing. Between the barrel and the casing is placed a plastic insert with longitudinal channels for air flow in the back-stroke chamber, which is sandwiched three axial inserts, pass the components through the entire machine body (2).

The disadvantage is that the whole metal barrel and axial screws are not dampen vibration from jet strike of the working tool on the end of the stem and transfer it to the handle.

Most similar to that proposed by its technical essence is a pneumatic percussion machine containing barrel consisting of two telescopically established links with the exhaust and by-pass openings, the percussion mechanism, placed in the trunk with the possibility of axial movement and divides it on the camera backward and forward movement, a body made of an elastic polymer hosts with tightness of the barrel and which communicates with the barrel by means of the corresponding flange, a Cup mounted on the end of the stem, placed in it a mechanism of distribution, starter, consisting of fitting with the valve mechanism and plunger holder replacement tool made in the form of a plastic Cup mounted on the end of the plastic housing holds a split sleeve (3).

However, it also has disadvantages, namely the trunk, mounted with tension in a plastic case, does not exclude the possibility of its rotation, and may be offset radial holes of the barrel relative to the radial holes of the housing, the compressed air present in prodol what's channels between two media, namely, between the metal barrel on one side and plastic on the other side and inflates the case, without providing the tightness of the channels is pretechka compressed air from the chamber forward stroke in the back-stroke chamber, and Vice versa. One external shoulder of the barrel, interacting with the internal shoulder of the housing, causes together contact your local voltage and reduces the resource.

The technical result of the claimed invention is the provision of fibromatoses, reducing noise and increasing efficiency by improving the comfort and the availability of the machine in any media, including in hazardous during an emergency, as well as reducing the weight of a pneumatic machine.

The technical result is achieved by a pneumatic percussion machine includes a housing placed in it a metal barrel, which is made exhaust, bypass direct and bypass the opposite holes, the drummer, is placed in the barrel with the possibility of axial movement and separating the camera backward and forward movement, the glass, the mechanism of distribution mains, pumping straight and forcing reverse channels, placed in the Cup and attached to the end of the barrel, fitting with shut-off ball and quick release mechanism is SMOM and the handle, thus according to the invention it is equipped with a shock absorber of a soft elastomer, made in the form of a torus and installed inside the arm under the glass, and a protective cover mounted on the body to form between them an annular cavity on the casing below the casing is made of concentric flange dividing mentioned annular cavity in the annular chamber, the barrel is made of at least three sections with annular or helical ribs or knurling on the outer surface, telescopically installed with the possibility of relative axial movement without collision and filled shockproof elastomer forming the casing, the walls of which are provided with channels for communication with the camera forward stroke through the bypass direct port in the barrel, for communication with one hand with the back-stroke chamber through a return by-pass port in the barrel, and on the other side with the inlet of the reverse channels of distribution mechanism, and the communication with the said annular chambers through exhaust openings, the channels divide the housing on the inner and outer casings, United elastic ridges, the outer casing is made providing the holding hand of the operator, and the glass, the mechanism of distribution, protective casing and handle made of impact-resistant elastomer R is the heat of hardness.

In addition, in the particular case of complete pneumatic percussion, quick-release mechanism is in the form placed inside the hollow fitting elastic nipple with an annular flange and clamp fitting is made with an annular groove for engagement with the flange of the nipple, with radial drainage holes for messages annular grooves of the nipple with the atmosphere and with grooves on the outer surface of the nipple is made from the petals with rapovymi dogs to interact with grooves fitting and the clamp is installed with the possibility of reciprocation for fixing the nipple relative to the fitting in the absence of compressed air in the nipple, and as the elastomer used polyurethane.

Due to the fact that the barrel is made of several, for example three parts installed telescopically one in the other with the possibility of axial movement relative to each other, precluding axial collision with links filled shockproof elastomer, for example polyurethane, which forms the housing and holds these parts, is virtually complete disease reactive energy from the impact of the working tool on the end of the stem.

Due to the fact that each link has its own time constant determined by its mass and elasticity of the polymer, and oscillate in antiphase, that reduces vibration, and the presence of a shoulder on the outer surfaces of the links of the filled elastomer, does not create the concentrated action of inertial force, and it is distributed along the entire length of the barrel and the effect on the elastic elastomer in contact with his shoulder, while deepali reactive power of the working tool contribute to the different speeds of propagation of the shock wave in the case of elastic elastomer and on the one hand associated with it, and on the other hand are not interconnected metal links of the trunk. Thus, the more links in the trunk, the less vibration.

Due to the fact that the inside wall of the case is made channels for all its length, part of which communicates with one hand through the back of the overflow drain hole from the back-stroke chamber and the other side with the inlet channels-reverse mechanism distribution, they function as ducts reverse, and the other part of the longitudinal channels communicates with the camera forward stroke through direct spill port in the barrel, they are an additional receiver, which increases the amount of camera forward stroke, to increase the amplitude of the stroke of the striker and, accordingly, the impact energy.

Due to the fact that the channels divide the housing into two membranes, the inner of which envelops article is ol, and the external is placed in the hand of the operator, which are connected to the elastic ridges formed by the same channels, managing hammer allows displacement of the shells relative to each other in a circular motion and in a longitudinal direction that reduces the effect of vibration on the operator's hand, and the presence of air in the channels of the housing provides an air cushion in the body, which reduces vibration in the radial direction.

Due to the fact that outside of the housing in the field covered by the protective cover, made of concentric flange, the diameter of which corresponds to the inner diameter of the casing and which divide the annular cavity to the corresponding annular exhaust air passing out of the exhaust hole of the barrel, flows through the shoulder and throttled in each camera, losing their residual energy, which leads to reduction of noise at the exhaust.

Due to the fact that the glass and placed in it the mechanism of the distribution made of impact-resistant elastomer and have different hardness, when the screw Cup at the inner end of the housing, on the one hand, provides a dense preload mechanism distribution by the end of the stem, which does not require the Belleville springs, etc. and on the other hand, due to the friction properties of the elastomer is provided C is sidenote screw connections from samootvinchivaniya under shock and does not require contradic studs, when two elastic element prevent the transmission of vibration in the longitudinal and transverse directions.

Due to the fact that the protective cover, the absorber and the handle is made of elastic polymer and the hardness of their selected taking into account energy machines, weight, destination, facilities management and tactile perception, provides protection of both hands in all directions and the ability to use it in any aggressive or explosive environment, as in a car with no mating or cooperating (except the drummer-peak) between the metal parts capable of generating a spark, and a pair of drummer-peak mode of impact and generating sparks is inside the trunk, where there is always compressed fresh air from the compressor and the external ambient air containing gases that can ignite from a spark, to get inside the trunk can not.

Thanks to the absorber placed in the handle and is made from elastic elastomer in the shape of a torus, decreases the impact of shocks on the handle, since the impact energy is spent on elastic deformation (bending, compression and tension elements Torah, at the same time he works as a return spring.

Due to the above-mentioned distinguishing features of the claimed machine changed the structure of the vibration, namely strike in matematicheskaya as a Delta-function, the physical interpretation is the amplitude of the impact force without duration in time. In the inventive machine body control - arm experiencing a reaction from the reverse stroke of the tool in the trunk for some time, and this is not a kick, and push. In the inventive machine during its operation by contact of the operator's hand with a grip no tremor of fingers of arms and hands, so the machine fibrobeton

Due to the fact that the clamp mechanism is in the form of a hollow elastic nipple, placed inside the fitting, and while it made the annular shoulder, and inside of fitting the corresponding annular grooves and radial drainage holes, indicating these grooves with the atmosphere, the compressed air acting upon the nipple into the fitting, fanning nipple and prijimae it to the inner walls of the fitting, the shoulder of the nipple are included in the respective grooves of the fitting and, thus, is engaged. The area of the inner surface of the nipple, which operates with compressed air, inflating it, an order of magnitude higher than the cross-sectional area, which acts repulsive force. Hence the clamping force on the order exceeds the buoyancy force and ensures reliable engagement of the ribs in the grooves of the socket.

Due to the fact that at the outside of the nipple on the environment and the activities performed petals with rapovymi dogs and there is also a manipulator, made in the form of a cylindrical sleeve covering the body of the nipple and having the opportunity reciprocating movement, and on the outer surface of the fitting is made corresponding groove enables fixation of the quick connector in the absence of compressed air, when the ratchet pawl petals are placed in the groove of the fitting, and the manipulator moves on the petals against the groove.

Comparative analysis with the prototype shows that the claimed machine meets the criteria of the invention of "Novelty."

The comparison of the proposed solutions not only prototype, but also with other technical solutions in related areas of technology did not allow the authors to identify technical solutions containing similar characteristics, and therefore the proposed solution meets the criteria of the invention "Significant differences".

The invention is illustrated by drawings, where figure 1 shows a structural diagram of the inventive pneumatic vibrobetona drum machine action figure 2 - cross section of Figure 1 along a-a, b-B and b-B, figure 3 shows the fitting with quick release mechanism in a static state.

Pneumatic vibrobetona percussion machine contains the barrel, consisting of several, for example three, 1, 2, and 3 links, with exhaust 4 and pass 5 direct and reverse 6 is verste, drummer 7, which divides the barrel chamber of the direct 8 and 9 reverse stroke, building 10 with longitudinal channels 20, 21 and 22 which divide the housing 10 into two shell - inner 23 and outer 24, which are connected by jumpers 25, the annular shoulder 26 in the annular cavity dividing it by the corresponding annular Cup 15 placed in it a distribution mechanism 11, the protective cover 17 from the exhaust holes 40, the handle 18, in which is put a damper 19 and the glass 15 enshrined therein radially mounted fitting 16 with quick release mechanism comprising from the hollow elastic nipple 27 with the annular shoulder 28 on the outer side, is placed in the nozzle 16, in which the corresponding annular grooves 29 for engagement with the shoulder 28 of the nipple, which are communicated with the atmosphere through the drain radial holes 30, and the outside is made around the circumference of the retainer 31 petals with rapovymi dogs 32 and is installed with the possibility of reciprocating movement of the cylindrical arm 33, the diameter of which corresponds to the diameter of the footprint of the outer retainer nipple and annular groove 34 is made on the fitting 16, which respectively fit ratcheting pawl 32 and fixed arm 33, in addition machine contains the plunger 35 to run it in action, the cap 36 is La hold the working tool 37 and split sleeve 38 to install the tool with a wide blade, for example, chisel, shovel, etc.

Works of the inventive machine is as follows. Install the machine working part of the tool 37 on the surface and click on the handle 18 in the axial direction. The plunger 35, moving together with the handle, utaplivaet ball fitting 16 and the compressed air from main line enters the supply chamber 39 and then through the feeding channel 12 in the mechanism of distribution, where alternately, depending on the position of the striker 7, is fed to a pressure direct 13 or 14 reverse channels. For example, as shown in figure 1, is presented in reverse 14 channel and forth along the longitudinal channel 20 of the housing 10 in the back-stroke chamber 9 through the bypass holes 6, which, extending, affects the drummer 7 and throws it into the forward stroke chamber 8, where the compression of the remaining air and its accumulation in the channels 21 as additional receivers. When they move the striker 7 opens the exhaust holes 4, through which the back-stroke chamber 9 is communicated through the channels 22 and outlet holes 40 with the atmosphere. Is the exhaust of spent idling air. The distribution mechanism 11 closes the back of the intake channel 14 and opens straight inlet channel 13. Compressed air it enters the forward stroke chamber 8 and, as it expands, it forces the striker 7 is accelerated to move such is the pressure of the working tool and gain kinetic energy. Upon contact of the striker 7 tool 37 last produces useful work unlike, while the exhaust air from the chamber 8 a forward stroke through the open exhaust 4 holes through the channels 22 and outlet 40 of the protective casing 17 is discharged into the atmosphere. Thus ends a percussion loop. Next, the operation of the machine repeats the above algorithm.

The main advantage of the inventive machine compared to the prototype is vibropitateli, due to the reduction in the degree of vibration, and changes in its structure and efficiency is improved by increasing the duration of work and comfortable tactile perception arm and the casing of the machine when working it.

This is achieved by the fact that the barrel consists of multiple segments mounted telescopically in one another with the possibility of axial movement relative to each other. All parts of the trunk from the outside have a profile in the form of an annular or helical ribs or roughness in the form of knurling and filled shockproof elastomer which forms the housing, the retaining these links. Thus the total mass of the trunk is dispersed in proportion to the units each of which forms its own oscillatory system with its time constant, and together they oscillate in opposite phases, which contributes to deepali number is bateley energy and reduces vibration. The channels made in the walls of the body, provide communication for the passage of air and its redistribution, and divide the housing into two shell - inner and outer, the first of which envelops the shaft, while the second is held by the hand of the operator, connected by an elastic ridges formed by the above-mentioned channels also contribute to the reduction of vibrations due to the possibility of the shells to move on elastic jumper one relative to another in all directions.

Concentric ribs on the outer surface of the casing in the annular cavity between the housing and the protective cover to form a corresponding annular chamber in which the exhaust air is choked and loses residual energy before the exhaust. This reduces the level of noise from the exhaust.

The glass with the installed distribution mechanism, tightly attached to the end of the stem, due to the fact that both are made of impact-resistant elastomer, ensure reliable fixing screw connections from samootvinchivaniya due to the frictional properties of the material and again damping of longitudinal and transverse vibrations when working on the spoil heap, when the handle and the glass of the applied shear forces.

Protective casing and handle, also made of impact-resistant elastomer, provides a comfortable tactil the Noah perception of the hands of the operator and the opportunity to work with a hammer in an explosive environment, as there is no moving and mating between metal parts that can cause sparking, and the absorber is made of an elastic elastomer in the form of the Torah and placed inside arm under the glass reduces impacts of housing in the handle due to the fact that he is experiencing elastic deformation of both compression and tension and bending at the same time.

Operability is achieved also by the fact that the clamp mechanism is in the form of a hollow elastic nipple, placed inside the fitting, while the outside of the nipple is made annular flange and fitting the corresponding annular grooves communicating with the atmosphere, in which the sink flange nipple, when there is compressed air, which inflates it against the inside wall of the fitting, thus providing a reliable connection.

In a static state, in the absence of air, the efficiency of the connection is achieved by the fact that at the outside of the nipple on the circumference of the completed petals with rapovymi dogs and there is a clamping arm, made in the form of a cylindrical sleeve covering the body of the nipple and having the opportunity reciprocating movement, and on the outer surface of the fitting is made corresponding groove, in which the sink ratcheting pawl and held his man what pulation.

Sources of information

1. U.S. patent No. 4483402, NCI 173-134, 01.12.81,

2. U.S. patent No. 4673042, NCI 173-134, 29.05.89,

3. RF patent №2244827, AS 37/24, 25D 9/00, 17/00, 02.06.03,

1. Pneumatic percussion machine, comprising a housing placed in it a metal barrel, which is made exhaust, bypass direct and bypass the opposite holes, the drummer, is placed in the barrel with the possibility of axial movement and separating the camera backward and forward movement, the glass, the mechanism of distribution mains, pumping straight and forcing reverse channels, placed in the Cup and attached to the end of the barrel, fitting with shut-off ball and quick release mechanism and the handle, characterized in that it is equipped with a shock absorber of a soft elastomer, made in the form of a torus and installed inside the arm under the glass, and a protective cover mounted on the body to form between them an annular cavity on the casing below the casing is made annular shoulder dividing mentioned annular cavity in the annular chamber, the barrel is made of at least three sections with annular or helical ribs or knurling on the outer surface, telescopically installed with the possibility of relative axial movement without collision and filled shockproof elastomer, Brazauskas, in the walls of the channels for communication with the camera forward stroke through the bypass direct port in the barrel, for communication with one hand with the back-stroke chamber through a return by-pass port in the barrel, and on the other hand - with positive feedback channels of distribution mechanism, and the communication with the said annular chambers through exhaust openings, the channels divide the housing on the inner and outer casings, United elastic ridges, the outer casing is made providing the holding hand of the operator, and the glass, the mechanism of distribution, protective casing and handle made of impact-resistant elastomer of different hardness.

2. Machine according to claim 1, characterized in that the clamp mechanism is in the form placed inside the hollow fitting elastic nipple with an annular flange and clamp fitting is made with an annular groove for engagement with the flange of the nipple, with radial drainage holes for messages annular grooves of the nipple with the atmosphere and with grooves on the outer surface of the nipple is made from the petals with rapovymi dogs to interact with grooves fitting and the clamp is installed with the possibility of reciprocation for fixing the nipple relative to the fitting in the absence of a pressure in the Ghost in the nipple.

3. Machine according to claim 1, characterized in that the elastomer used polyurethane.



 

Same patents:

Pneumatic hammer // 2280554

FIELD: mechanical engineering; building construction; mining art.

SUBSTANCE: pneumatic hammer has case. Striker of hammer is disposed inside the case for reciprocal motion. Casing provided with exhaust ports embraces the case for slide against it. Pneumatic hammer also has collector, handle and working tool. Handle is mounted onto case for slide. Vibration insulator is disposed between handle and case. Collector is connected with front part of handle and it embraces the casing for slide against it. Casing has rear bead and. Case is flexible connected with handle for movement of casing along case at the direction of working tool. To move casing along case in the direction of working tool, the other vibration insulator is mounted between front part of collector and rear bead of casing for rest.

EFFECT: reduced vibration of pneumatic hammer.

5 cl, 4 dwg, 1 ex

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: mining, particularly hand tools or hand-held power-operated tools specially adapted for dislodging minerals.

SUBSTANCE: pneumatic hammer has body with radial outlet channel and central channel, lid with annular shoulder and central orifice supported by body end in air-tight manner, striker with through axial channel dividing central body channel into working and idle stroke chambers, tube having blind shoulder arranged from lid side, longitudinal and radial channels. The tube is installed coaxially in central body channel and cooperates with through axial channel of the striker and with central lid orifice by side wall thereof so that annular dap is created between tube and lid. The annular gap may be closed with blind lid shoulder. Hammer has cup, which is air-tightly installed relative annular shoulder and body so that annular accumulation chamber is formed between side cup surface and lid. Annular accumulation chamber is permanently communicated with idle stroke chamber by radial bypass channel in the body. Annular lid shoulder and cup with air inlet channel define prechamber. Air inlet channel permanently communicate prechamber with compressed air system through air hose and nipple releasable connected to the cup. Hammer comprises ring with outlet orifices forming outlet chamber between the body and outlet channel, executive tool with shank and shoulder cooperating with body end and with shank cooperating with hammer, cap with annular shock absorber retaining executive tool from falling out of central body channel. Executive tool shank is provided with central blind hole for receiving tube rested upon bottom thereof. Side surfaces of the tube and central blind hole cooperate to define annular channel having throat, which is not less than that of longitudinal tube channel.

EFFECT: increased operational reliability and power of hammer stroke.

2 dwg

FIELD: mining, particularly hand tools or hand-held power-operated tools specially adapted for dislodging minerals.

SUBSTANCE: pneumatic hammer comprises arm with cup, executive tool, body with outlet channel closed with lid from arm side and defining annular prechamber for system air between cup and lid, working and idle stroke chambers, displacement chamber located between lid and larger body step and pressurizing chamber defined by recess with cut-off edges permanently formed on inner side surface of central stepped channel by annular prechamber communicated with compressed air system. Hammer also has inlet throttle channel formed in pressurizing chamber wall, annular neck portion located in central stepped lid channel between pressurizing and displacement chambers, bypass displacing channel having radial outlet formed in the body and communicating with working stroke chamber arranged between pressurizing chamber and outlet channel formed in the body and striker with upper and lower cut-off edges located in central stepped channel along body axis. Distance between the striker edges is greater than distance between displacement chamber outlet and cutoff edge of larger central channel step. Hammer is additionally provided with inlet throttle channel made in the lid and permanently communicated with annular prechamber. Radial bypass displacing channel inlet is formed in the annular neck portion between pressurizing and displacing chambers from displacing chamber side so that distance between cut-off edges of displacing chamber on side central stepped body channel surface is greater than distance between cut-off striker edges.

EFFECT: increased power of hammer stroke.

1 dwg

Pneumatic hammer // 2244828

FIELD: mechanical engineering; jack hammers.

SUBSTANCE: proposed hammer has housing with two working chambers, upper and lower ones, arranged in tandem and divided by bridge with hole. Striker in form of rod with two pistons end ends, upper and lower ones, is installed in chambers. Striker is in contact with shank of working tool. Hammer is provided with air distributor and channels in housing. Channel along which compressed air is supplied to execute idle stroke of striker are laid only to lower part of upper chamber under upper piston. Chamber under lower piston is in constant communication with atmosphere through holes in walls of housing in zone of contact of striker with shank of working tool.

EFFECT: reduced back blow (vibration) and force to be applied to hammer at operation.

2 cl, 2 dwg

FIELD: mining industry, construction, mechanical engineering, etc.

SUBSTANCE: machine includes barrel made of impact and static sections, mounted telescopically one in another with possible axial displacement, excluding axial impaction thereof to each other, while both sections are placed in resilient body, made of elastomer, and body has inner bead formed by coaxial recesses of greater and lesser diameters, while impact section is placed in recess of lesser diameter on the outer side of body, and static section is placed in body recess of greater diameter and has outer bead for interaction with appropriate inner bead of body, and also has longitudinal grooves on outer surface, made along forming lines, portion of which by radial drain ports near inner end of barrel are connected to straight drive chamber, and second part connected to back flow chamber by drain ports near outer end of barrel, below-valve and above-valve saddles, respectively covers for barrel and valve box, are made in form of straight and reversed cones, and valve is made of elastic polymer in form of two-tab construction, tabs of which consist of two hollow truncated cones, rigidly interconnected by bases, with forming of chamber, conical on both sides, and outer conical surfaces of upper and lower tabs match conical surfaces of respectively above-valve and below-valve saddles and interact with them in turns, impact mechanism is made of two masses serially placed in barrel - striker and piston, having spherical ends for interaction with forming of intermediate chamber between them, working implement holder lid, fixed on outer end of body, made of elastomer, has a recess in form of inner cone inside ring-shaped edge for interaction with appropriate outer cone on body and pass aperture in base near center, diameter of which matches diameter of bead on replaceable implement, holder of working implement is made of shockproof elastomer in form of cut bushing, having a bead outside for interaction with bottom inside lid and a cylindrical portion, diameter of which matches diameter of pass valve in lid, in which it is mounted, and inner holder diameter matches diameter of neck of replaceable working implement.

EFFECT: higher efficiency, lower vibration, higher effectiveness.

7 dwg

The invention relates to mining and can be used in the mining and coal industry

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

Pneumatic hammer // 2213866
The invention relates to the mining industry, in particular, to pneumatic hammers for destruction, for example, rock and can be used to create air hammers

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

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: mechanical engineering.

SUBSTANCE: proposed impact-action pneumatic machine has hollow housing with air feed rod, piston with rod with spaces in piston and rod closed by piston cover, and spool, all arranged in housing. Spool is made in from of bushing installed for sliding with axial calibrated clearance in piston space on air feed rod of housing. Ring pass channel communicating with spaces of piston and rod is made between inner surface of bushing and outer of air feed rod.

EFFECT: improved reliability and serviceability of machine.

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 industry.

SUBSTANCE: pneumatic percussion tool for trench free mounting of new and changing worn underground pipelines includes: hollow housing; striker having through stepped cavity and radial ducts in walls; stepped branch pipe with lengthwise duct mounted by its large step inside striker and by its small step secured to housing; air exhaust unit; chambers for working stroke and idle stroke of striker. Lengthwise duct of branch pipe is closed in zone of its large step. Idle stroke chamber of striker is formed between walls of striker and outer surface of branch pipe. Working stroke chamber of striker is formed by mutually communicating additional ducts of said two chambers. Inside housing between its walls, front end of striker and outer surface of tube there is chamber that is always communicated with atmosphere through additional windows of tube walls.

EFFECT: improved design providing increased striking power, enhanced operational reliability of tool.

2 dwg

Pneumatic hammer // 2280554

FIELD: mechanical engineering; building construction; mining art.

SUBSTANCE: pneumatic hammer has case. Striker of hammer is disposed inside the case for reciprocal motion. Casing provided with exhaust ports embraces the case for slide against it. Pneumatic hammer also has collector, handle and working tool. Handle is mounted onto case for slide. Vibration insulator is disposed between handle and case. Collector is connected with front part of handle and it embraces the casing for slide against it. Casing has rear bead and. Case is flexible connected with handle for movement of casing along case at the direction of working tool. To move casing along case in the direction of working tool, the other vibration insulator is mounted between front part of collector and rear bead of casing for rest.

EFFECT: reduced vibration of pneumatic hammer.

5 cl, 4 dwg, 1 ex

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: mining and building, particularly air percussion machines for placing sheet pile bulkheads, piles, mould-pipes, or other moulds in ground by driving.

SUBSTANCE: machine comprises hammer, guiding unit for hammer movement, hammer lifting unit having body with cavity for distribution means receiving, and compressed air working chamber provided with unit for hammer lifting unit arrangement and with membrane having compressed air exhaust orifice. Hammer lifting unit body is provided with compressed air supply channel, which feeds compressed air from manifold and with compressed air supply orifice, which moves compressed air in working chamber from cavity arranged for distribution means installation. The hammer is installed to cooperate with membrane and with distribution means through above compressed air exhaust orifices made in membrane to supply compressed air in hammer lifting unit body. The distribution means is spring-loaded shutoff valve. Guiding unit for hammer movement has exhaust windows and is made as vertical pipe with lid, which are connected with hammer lifting unit body. The hammer lifting unit body has stepped cavity in which spring-loaded three-stage rod is arranged, at least two compressed air supply orifices, which feeds compressed air in working chamber from cavity adapted for distribution means receiving and lid made as a single member with pipe. Lower end of three-stage rod and upper end of rod to be driven are arranged in lid hollow. The three-stage rod may perform axial displacement relative hammer lifting unit body and cooperate with hammer by upper end and with rod to be driven by lower end thereof. The distribution means is installed so that it may cooperate with hammer through membrane, annular plate and rigid connection means passing through above orifices made in hammer lifting unit body. Central stage of three-stage rod has transversal dimension exceeding that of lesser step of stepped hammer lifting unit body cavity.

EFFECT: increased operational efficiency.

3 cl, 1 dwg

Impact device // 2265721

FIELD: impact devices, particularly adapted to loosen frozen ground and to dislodge rock, artificial materials, to compact ground in mining and metallurgical industry, utility, building and to design die-forging hammers and pile drivers.

SUBSTANCE: device comprises body and striking piston arranged in it and defining idle chamber permanently communicated with pressurizing line and hydropneumatic accumulator. The idle chamber is provided with coaxial end groove having side surface mating striking piston at the end of working stroke. Device also has working stroke chamber alternately communicated with drain line or idle chamber through the main hydrodistributor. The working stroke chamber also has coaxial end groove mating the striking piston at the end of idle stroke. The main distributor is provided with control hydraulic cavities having different areas. Cavity having the smallest area is permanently connected with pressurizing line, cavity having the greatest area is selectively connected with drain line through the first additional distributor at the end of working stroke and with pressurizing line through the second additional distributor at the end of idle stroke.

EFFECT: increased reliability and reduced time of structural units resetting.

2 cl, 1 dwg

FIELD: machine engineering.

SUBSTANCE: percussion action machine includes housing; working tool holder; guiding cylinder where percussion mechanism with striker is arranged; device for holding striker in front position near working tool holder at idle stroke of percussion action machine. Said device includes slit springy ring having non-uniform along its perimeter cross section whose area reduces towards slit.

EFFECT: enhanced reliability of holding striker in front position and therefore improved operational reliability of the whole percussion action machine.

4 cl, 6 dwg

Up!