FIELD: machine building.
SUBSTANCE: tool contains casing with holes, striker with longitudinal channel installed in the casing, forward and reverse stroke chambers, compressed air supply channel to reverse stroke chamber, exhaust system and resilient ring. The exhaust system contains stop internal surface of the casing with front ring shoulder and reverse stroke limiter on its rear part. The resilient ring is installed in the ring groove on the striker with possibility of interaction with stop internal surface of the casing. The longitudinal grooves are made on the external surface of the striker. Forward stroke chamber contains the resilient tube, its one end is connected with the casing hole, and the other end is connected with the striker longitudinal channel. Compressed air supply channel to the reverse stroke chamber is made by channel of the resilient tube and longitudinal channel of the striker.
EFFECT: design simplification of the impact tool.
2 cl, 3 dwg
.The technical solution relates to mining and construction equipment, namely, pneumatic devices, impact, and can be used for the destruction of the rocks, the driving rod elements in the soil, soil compaction, and so on
A device impact on the patent of Russian Federation №2019693, CL E21C 3/24, E02F 5/18, B25D 9/04, publ. in BI No. 17 15.09.1994 g, comprising a housing with holes, the drummer, the camera forward stroke, the back-stroke chamber, the channel for communication camera forward stroke with a source of compressed air channel in the drummer for the message camera reverse camera forward stroke, two provideproperty plates with Central holes, one fixed on the front end surface of the drummer, the other on the return part of the body and forming with the drummer and the reverse camera.
A disadvantage of the known design is that the fragility provideproperty plates, which significantly reduces the reliability of the device.
The closest solution to the technical nature and essential features of the system is the impact on the patent of Russian Federation №2105881, CL E21C 3/24, E02F 5/18, publ. in BI No. 6 27.02.1998, comprising a housing with inlet and exhaust openings, mounted in the housing for movement drummer, camera forward and reverse channel in udarn the ke for messages cameras direct and reverse, the guide element in the form of through-rod, mounted in the housing, the channel for messages cameras direct and reverse, made in the shaft, shutoff valve, an annular groove on the outer surface of the striker, front annular ledge and the limiter reverse on the inner surface of the body, shutoff valve, made in the form of an elastic ring mounted in the annular groove of the striker with the ability to interact with the inner surface of the housing.
A disadvantage of the known device is its unreliability because the presence of pairs of slip between the guiding element and drummer requires alignment of moving parts: body, drummer and guide element, which in practice is difficult. As a result, the probability of jamming of the mechanism in case of contact with small particles on the surface of the engagement of the striker with a guiding element in the form of through-rod. It does not provide the reliability of the device.
The technical objective of the proposed solutions is to ensure the reliability of the device by simplifying its design.
The problem is solved as follows. Features the percussion device comprising a housing with holes mounted in the housing with the possibility of AC is their drummer with a longitudinal channel, the camera forward and reverse channel for supplying compressed air to the back-stroke chamber, the exhaust system comprising locking the inner surface of the housing with the front annular ledge and stop reverse on its back, an elastic ring mounted in an annular groove on the drummer with the ability to interact with the locking inner surface of the housing, the longitudinal grooves on the outer surface of the missile equipped with a flexible tube placed in the chamber forward stroke, which is connected at one end with a hole in the hull, the other with a longitudinal channel drummer, when this channel for supplying compressed air to the back-stroke chamber formed by the channel of the flexible tube and the longitudinal channel drummer.
This embodiment allows the device to ensure its reliability, simplifying design and preserving the dignity of the prototype, as it excludes the presence of a pair of sliding between a drummer and a guiding element, as in the prototype. This also increases the service life of the device and reduces the loss of energy to friction.
It is advisable to provide a device fitting and damping bushing mounted in the bore of the longitudinal channel drummer, and fitting to perform in the form of a bolt with a through axial channel and install it in the threaded hole of the damping liners and, the connection channel elastic tube with a longitudinal channel of the striker to run through the axial channel of the specified socket.
This will reduce the impact load at the connection point of the striker with the elastic tube, thereby improving the reliability of the device
The essence of the technical solution is illustrated by a specific example of the apparatus for impact action and the drawings (Fig.1-3). In Fig.1 shows a device percussion, drummer which is the front end (lower drawing) position, the General view in longitudinal section. In Fig.2 shows in enlarged scale a fragment of a longitudinal section of drummer with fitting and damping bushing mounted in the bore of the longitudinal channel drummer. In Fig.3 shows the device percussion, drummer which occupies the extreme rear (upper drawing) position, the General view in longitudinal section. Arrows in Fig.1 and 3 show the direction of flow of compressed air.
The percussion device includes a housing 1 (Fig.1) with holes, drummer 2 with a longitudinal channel 3, mounted for movement in the housing 1, the forward stroke chamber 4, a camera 5-reverse, constantly communicated with the line of compressed air by means of a channel for supplying compressed air to the back-stroke chamber 5, educated, what about the channel elastic tube 6, connected at one end with a hole in the casing 1, the other with a longitudinal channel 3 drummer, and a longitudinal channel 3 of the striker 2. The device also includes an exhaust system, comprising locking the inner surface (position not labeled) of the housing 1 includes a front annular protrusion 7, the conical surface 8, the limiter 9-reverse, made in the form of a series of grooves opening onto the rear part 10 of the locking surface of the housing 1, and the elastic ring 11 that is installed in the annular groove 12, is made on the outer surface of the striker 2, with the opportunity to interact with the locking inner surface of the housing 1. Annular groove 12 has a surface 13 of the rear wall, and an elastic ring 11 - end surface 14. On the outer surface of the striker 2, which interacts with the housing 1, made of longitudinal grooves 15, intended for the passage of compressed air after the exhaust from the chamber 5 reverse. To supply compressed air into the chamber 4 forward stroke is the inlet opening 16. At the rear end of the body 1 is made outlet 17.
The device is suitable to provide a nozzle 18 (Fig.2) and the damping sleeve 19 mounted in the bore 20 of the longitudinal channel 3 of the striker 2, the fitting 18 is made in the form of a bolt with a through axial channel 21 and is mounted in the threaded hole of the damping wut the key 19, when the tube 6 is connected to the longitudinal channel 3 in drummer 2 through the axial channel 21 of the fitting 18.
The percussion device operates as follows. Compressed air through the opening 16 (Fig.1) in the housing 1 into the chamber 4 forward stroke, and to channel the compressed air formed by the channel of the flexible tube 6 and the longitudinal channel 3 of the striker 2, the back-stroke chamber. The flexible tube 6 is in a flattened condition. Drummer 2 is the front end (lower drawing) position. In this position of the striker 2 (Fig.1) the elastic ring 11 is in contact with the front annular protrusion 7 locking the inner surface of the housing 1, by providing the sealing chamber 5 reverse, resulting in increased pressure of the compressed air. Under the action of compressed air pressure of the elastic ring 11 with its end surface 14 is pressed against the surface of the rear wall 13 of the groove 12 of the striker 2, deformed and rotated relative to the locking of the inner surface of the housing 1. Simultaneously, under the action of compressed air pressure of the elastic ring 11 is pressed against the front surface of the annular projection 7. Due to the difference of the squares of the 4 cameras direct and reverse 5 stroke drummer 2 performs a return stroke and begins to move at the rear (upper drawing is) position (Fig. 3). At the same time, the flexible tube 6 under the influence of drummer 2 begins to wrinkle, not preventing the firing pin 2 to move up. Together with drummer 2 elastic ring 11 slides over the locking of the inner surface of the housing 1, first the front surface of the annular projection 7, then the conical surface 8 and further in the rear part 10 of locking the inner surface. When this elastic ring 11 is stretched in the radial direction and maintains contact with all surfaces. Under the action of compressed air pressure in the contact zone of the outer surface of the elastic ring 11 is temporarily assumes the shape of the front surface of the annular projection 7, then the shape of the conical surface 8 and further the shape of the rear part 10 of locking the inner surface of the housing 1. A gradual transition from one type of surface to another compensates the decrease of the contact pressure, which occurs when the tensile elastic ring 11 and the increase of the elastic force. This occurs simultaneously with the rotation of the elastic ring 11 relative to the locking of the inner surface of the housing 1, which decreases the contact area between the outer surface of the elastic ring 11 locking the inner surface of the housing 1. The contact pressure of the elastic ring 11 for locking the inner surface of the housing 1 is velocipede, that provides sealing chamber 5 reverse until the output of the elastic ring 11 on the number of grooves of the limiter 9-reverse, after which starts the message camera 5 reverse with the atmosphere through the longitudinal grooves 15 of the striker 2 and the outlet opening 17 of the housing 1. The pressure therein is reduced. Due to the elastic force accumulated in the elastic ring 11, is fast shrinking in the radial direction and restore the original shape of the elastic ring 11 is quickly lowered into the annular groove 12 on the drummer 2. Through the resulting annular gap, further longitudinal grooves 15 of the striker 2 and through the outlet opening 17 of the housing 1 ends with the exhaust of compressed air into the atmosphere.
Under the pressure of the compressed air in the chamber 4 forward stroke of the striker 2 first stops at the rear (upper drawing) position (Fig. 3), and then makes a rapid movement forward and strikes at the inner front end of the body 1. When this compressed air is replaced by drummer 2 from the chamber 5 reverse into the atmosphere. The flexible tube 6 is deflected. Just before blow elastic ring 11 comes into contact with the front annular projection 7 of the housing 1. Camera 5 reverse is closed. It again increases the pressure, and the cycle of operation of the device is repeated.
Ensuring the disorder fitting 18 and the damping sleeve 19, installed in the bore 20 of the longitudinal channel 3 of the striker 2, wherein the fitting 18 is made in the form of a bolt with a through axial channel 21 and is mounted in the threaded hole of the damping sleeve 19, with one end of the flexible tube 6 is connected to the longitudinal channel 3 in drummer 2 through the axial channel of the nozzle 18, to reduce the impact load at the connection point of the striker 2 with the elastic tube 6, thereby improving the reliability of the device.
1. The percussion device, comprising a housing with holes mounted in the housing for movement drummer with a longitudinal channel, the camera forward and reverse channel for supplying compressed air to the back-stroke chamber, the exhaust system comprising locking the inner surface of the housing with the front annular ledge and stop reverse on its back, and an elastic ring mounted in an annular groove on the drummer with the ability to interact with the locking inner surface of the housing, with the outer surface of the striker is made of longitudinal grooves, characterized in that the camera forward stroke placed elastic tube, connected at one end with a hole in the hull, and the other with a longitudinal channel drummer, and the channel for supplying compressed air to the back-stroke chamber formed to the cash elastic tube and a longitudinal channel drummer.
2. The device under item 1, characterized in that it is provided with a fitting and damping bushing mounted in the bore of the longitudinal channel of the drummer, and the fitting is made in the form of a bolt with a through axial channel and is installed in the threaded hole of the damping sleeve, and the connection channel elastic tube with a longitudinal channel drummer made to pass through the axial channel of the specified socket.
SUBSTANCE: device comprises a main impact assembly mounted in the hole of the transition element, and at least one additional impact assembly mounted on the axis of the main impact assembly in an additional opening in the transition element, and connected to this transition element.
EFFECT: increased speed of battering the rod element in the soil by increasing the frequency of strokes and occurrence of effect of soil liquefaction.
7 cl, 6 dwg
SUBSTANCE: device for trenchless pipeline laying by pricking method comprises the feeding mechanism from the guide frame with horizontal and vertical guide rollers with the possibility of their interaction with the outer surface of pipeline to be laid, and cable pulling winch, rod fixedly secured to the flange mounted on the front end towards the puncture of the laid pipeline, with the ball bearing installed on its end with possibility of supporting on it of the hollow working tip of conical form, inside the hollow working tip at its area of cylindrical shape, electric motor of circular rotation rod is installed relative to the axis of rotation rod with its support on the flange by means of seal assemblies. Stator of electric motor is fixed on the rod, and rotor - on the inner surface of horizontal area of the hollow working tip. Helical surface of auger-type is fixed on the outer surface of cone area of working tip.
EFFECT: simplification of the device design, increase of reliability and lifetime of its operation, reduction of value of the required force for pricking and energy consumption.
SUBSTANCE: method of steering control of the working element for hole making in quick grounds and marshy grounds comprises immersing or rising the working element in case of deviation from the trajectory. At that the immersing or rising the working element is carried out by changing its weight. When emersion of the working element its weight is increased by supplying filler in the adjusting chamber of the working element. While immersing the working element as it moves the weight of the working element is decreased by removing a part of the filler from the said chamber of the working element.
EFFECT: immersion or emersion of the working element in the ground.
2 cl, 1 dwg
SUBSTANCE: proposed method consist in driving the pipe in soil, forming the soil core in pipe face section, forcing said core by air pressure portions in annulus, cutting off the core portions to make the chamber ahead of soil core portion by displacing the soil duct in the axis of submergence. Said soil duct is composed by submersible pipe to be displaced in submergence axis by static force. Soil core portions transfer is conducted by creating vacuum at submersible pipe external end.
EFFECT: lower power intensity, lower costs.
3 cl, 3 dwg
SUBSTANCE: this method consists in well drilling by rock cutter tool of well bottom tool connected with dual drill string with continuous slurry removal from well bottom and transfer of slurry by used working fluid flow under pressure via central channel of said dual drill string. This dual drill string is composed of stationary external pipe accommodating drill bar transmitting the torque and axial force to drill bit with rock cutter tool. At a time, said external pipe is fitted in said drilled well to be left therein as a casing after drilling. Dual drill string central channel is composed by drill bar channel.
EFFECT: higher efficiency and reliability, lower costs, expanded applications.
2 cl, 1 dwg
SUBSTANCE: method includes formation of a pioneer well along the design axis of the installed bundle of pipes between working and receiving pits and simultaneous installation of a drilling bar in it, which is connected to the working organ, subsequent expansion of the pioneer well to the design diameter by soil damage with the help of the working organ, simultaneous transportation of damage products with the help of a cleaning agent into the space between the expanded pioneer well and the bundle of pipes and installation of the bundle of pipes in the expanded pioneer well.
EFFECT: increased reliability of installation of a bundle of pipes without complications related to sags of surface above a well.
SUBSTANCE: method includes submersion of a pipe into soil with an open end, formation of a soil core in it and its removal from the pipe with the supplied fluid medium by means of breaking and squeezing out in parts. The fluid medium is supplied into the soil core at the outer side of the submerged pipe, using the channel of connection between the pipeline for supply of the fluid medium and the inner cavity of the submerged pipe.
EFFECT: increased efficiency due to reliability of soil core removal by means of creation of conditions to preserve integrity of a broken part of the soil core.
5 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: device includes a pipe-destructing working element with two disc knives, a reamer for enlarging the well diameter, an attachment device of a new plastic pipeline and a tie-rod element in the form of a rope with elements installed on it. Each element installed on the rope is made in the form of a detachable sleeve with three equally spaced radially oriented cylindrical rods, in each of which a fork with a ball is installed so that fixed radial movement is possible. A radial slot is made throughout the length of detachable sleeve between adjacent cylindrical bars; a retaining screw is inserted in a threaded hole in the middle of the above radial radial slot. The pipe-destructing working element is made in the form of an assembled two-section framework, the centre of the rear end face of which has a spherical slot. The reamer is made in the form of an assembled two-section flattened cone, the centres of both end faces of which have spherical slots The rear end face of the pipe-destructing working element and the front end face of the reamer are connected by means of a hinge joint consisting of a pin, on both ends of which balls are installed by means of a thread The rear end face of the reamer and the attachment device of a new plastic pipeline are connected by means of a hinge joint consisting of an additional pin, on one end of which a ball is installed by means of thread and inserted in the spherical slot of the rear end face of the reamer, and the other end of the additional pin is installed in an axial hole of the attachment device of the new pipeline and fixed with a nut
EFFECT: improving reliability of hinge joints and a tie-rod element at passage of curved sections of pipelines.
SUBSTANCE: proposed method comprises driving the trench to accommodate therein the protective jacket to receive the pipeline thereafter. Before driving said trench, in front of motor road or railway said protective jacket is placed to accommodate rotary screw with detachable cutting element at its end face directed toward the road. Cutting tool diameter equals protective jacket OD. Screw length exceeds that of protective jacket, screw extension being directed from the road. Screw shaft is engaged with rotary drive placed at slide rails provided with semicircular ledge arranged atop said rails and directed toward protective jacket above said screw, its end and jacket ends are jointed together by flanges to be bolted together. Slide rails are to be fixed relative to drive by "П"-like bracket secured at drive frame to thrust against slide rails rear end and to surround them from both sides. Then, screw drive is switched on to displace slide rails with revolving screw and protective jacket toward the road so that said jacket penetrates into soil to get completely buried therein. Then, said cutting element and bolts are removed from screw end. Then said screw is withdrawn from said jacket to fit main pipeline section therein.
EFFECT: safe and reliable laying, lower costs and labor input.
SUBSTANCE: installation comprises a frame, a carriage with a control unit arranged on it with a technological adapter, a hydraulic cylinder connected by the body to the frame, and with the stem to the carriage, at the same time the frame has guides for carriage rollers. The frame is made of the carriage frame and the hydraulic cylinder frame connected to each other.
EFFECT: increased reliability of operation and reduction of time for installation assembly and disassembly, increased volume of working space in a well and increased efficiency of performed works due to placement of a hydraulic cylinder with stem length that is larger than in a prototype outside the limits of the well, and whenever it is required to increase force characteristics.
3 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to percussion machines. It comprises body with slide valve, baffle and rod, piston, spring, impact sensor, working fluid flow sensor, working fluid flow exhaust and control channels. Rod is mounted in the baffle central bore to interact with the slide valve. Said working fluid flow sensor and spring are fitted on said rod. Said working fluid flow exhaust channel can communicate via slide valve bores with back stroke chamber and orifice with working fluid source. Said working fluid flow control channel communicates with working fluid source via control unit and orifice. Piston and body front wall inner surface form the working fluid flow control chamber. Permanent magnet is fitted on said rod at body front wall outer surface. Spring is arranged between piston and baffle. Working fluid flow sensor is composed of ferromagnetic element with control coil connected with control unit. In compliance with first version, impact sensor can be fitted on working tool and is connected with control unit while working fluid flow control chamber can be communicated with working fluid flow discharge channel at open slide valve. In compliance with second version, said chamber can be communicated with back stroke chamber at the hammer back stroke end.
EFFECT: automated control, simplified design.
2 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly to advisement of percussion machine impart frequency and poser. Said machine comprises case, hammer with discharge openings that form with the case the hammer forward stroke chamber and hammer backstroke chamber, inertial-friction valve with outlets and seal to reciprocate over the rod secured at hammer, working fluid source arranged to force working fluid into backstroke chamber. Working fluid is forced into backstroke chamber in controlled portions to make hammer with said inertial-friction valve reach the height in said case sufficient to deliver required impact power. Working fluid fed into said backstroke chamber is terminated to allow down travel of the hammer under action of gravity forces. Said inertial-friction valve is retained at top position at rod of the hammer under friction forces acting between the case and valve seal at hammer down travel to close discharge openings of the hammer and inertial-friction valve communicating both aforesaid chambers. It allows the travel of inertial-friction valve travel after hammer over the rod and closure of openings of hammer and said valve at hammer bottom position.
EFFECT: power savings, expanded applications.
2 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to percussion machine to break rocks and frozen soils. Proposed hammer comprises circuit chamber, hollow cylinder to house striker with central channel separating cylinder chamber into idle and working stroke chambers, central tube, extra tube with end closed on the side of idle stroke chamber, and working tool. Central tube extends through central channel of striker to communicate circuit chamber with idle stroke chamber. Said extra tube is arranged coaxially with annular clearance inside said central tube to communicate circuit chamber with idle stroke chamber. Cover has central trough bore for central tube to extend there through. Said cover is fitted on hollow cylinder end on the side of idle stroke chamber. Side surfaces of central tube and cover central trough bore make throttling channel to communicate circuit chamber with working stroke chamber. Hollow cylinder sidewall has radial discharge channel. Radial channel is made in central tube on the side of working stroke chamber. Distance between the most distant edges of radial discharge channel and radial channel of central tube does not exceed the length generating line of striker.
EFFECT: reliable starting and operation.
FIELD: process engineering.
SUBSTANCE: invention 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.
EFFECT: decreased weight and sizes, smaller recoil pulses.
6 cl, 3 dwg
SUBSTANCE: air device of impact action includes housing with radial outlet channel and central channel, cover plate with annular collar and central hole, hammer with axial through channel dividing the central channel into chambers of working and idle strokes, tube with collar on the side of cover plate, longitudinal and radial channels, shell installed so that annular accumulation chamber is formed between side surfaces of the shell and housing, air baffle ring with outlet holes, outlet chamber formed between housing and air baffle ring, and working tool. Additional tube with radial channel is installed coaxially to the tube and is adjacent to it. Tube from elastic material is installed between tube an additional tube.
EFFECT: avoiding unproductive air flow rate from the network by means of idle stroke chamber when it is interconnected with atmosphere.
FIELD: process engineering.
SUBSTANCE: invention relates to impact tools to be used in mining and construction. Proposed pneumatic hammer comprises hollow cylinder with discharge channel, striker, handle, discharge chamber with air deflector casing and discharge channel, working member and intermediate stepped anvil. Said striker divides cylinder inner space into working and idle stroke chambers with inlet channels. Anvil is arranged between striker and working member stem. Pneumatic buffer is arranged on anvil smaller step side. Annular mesh chamber is arranged on anvil larger step side to be communicated with hollow cylinder wall inlet channel. Said chamber has air distributor built in handle. Anvil central step has its face surface facing idle stroke chamber. Pneumatic buffer and mesh chambers are intercommunicated via bypass channel in anvil smaller-step body with deflecting edge on side surface of said smaller step. Deflector edge is periodically shut off by hollow cylinder on pneumatic buffer chamber side.
EFFECT: reduced specific air flow rate, higher efficiency.
15 cl, 14 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to construction and mining machinery intended for crushing rocky ground and frozen ground. Pneumatic hammer comprises circuit chamber, hollow cylinder accommodating striker with central channel dividing cylinder space into idle and work chambers, barrel and tube with throttle valve. Cylinder one face accommodates cover with flange and central through hole. Opposite face of said cylinder accommodates working tool. Cylinder sidewall is provided with discharge channels. Circular static augmentor chamber is arranged between barrel wall and cylinder outer side surface. Wall cylinder has augmentor channel to periodically communicate augmentor chamber with work chamber. Said augmentor channel is shaped over its length equal. Along cylinder generator, to striker length over striker end face edges. Cover is provided with throttle calibrated radial groove to communicate circuit chamber with circular static augmentor chamber. Tube is passed through striker central channel and cover central orifice to communicate circuit chamber with idle chamber via throttle valve. Tube side surfaces and those of cover central through hole form throttle annular channel that makes an inlet of work chamber.
EFFECT: work chamber air pressure variation control.
9 cl, 9 dwg
FIELD: machine building.
SUBSTANCE: air hammer consists of hollow cylinder with outlet channel, of striker dividing cavity of cylinder to chambers of working and idle strokes with inlet channels, of handle with devices for inlet and air distribution between chambers, of inlet chamber with air fending jacket and inlet channel and of operating tool with shank end. An intermediate stepped anvil is positioned between the striker and the shank end of the operating tool. A chamber of an air buffer is located on the side of less step of the anvil. From the side of a bigger step of the anvil there is arranged a circular network camera communicated with the distribution device in the handle with inlet channel in a wall of the cylinder. The middle step of the anvil with its end area faces the chamber of the idle stroke. Also, the middle step of the anvil has an air-escape channel with an outlet into the idle-stroke chamber and inlet on a section of side surface, this inlet is periodically overlapped with the cylinder from the side of the circular network camera.
EFFECT: decreased specific consumption of air and raised efficiency of device.
8 cl, 7 dwg
SUBSTANCE: invention relates to mining and construction equipment - to pneumatic impact devices, is used to break rocks, to drive rod elements into soil, etc. Device comprises vessel with holes, striker with longitudinal channels, chambers of forward and backward motion, exhaust system, inertial valve installed with the possibility of axial motion in specified channel until ledge in it, seat of inertial valve arranged in this channel at the side of forward motion chamber, elastic bush installed in the same valve, and support bushing installed between inertial valve and elastic bush.
EFFECT: invention provides for increased reliability of operation due to limitation of elastic bush deformation.
11 cl, 9 dwg
SUBSTANCE: invention relates to mining and construction. Chipper comprises handle, barrel equipped with holes, intermediate link, valve, valve cover, striker, chamber of working travel arranged along longitudinal axis of barrel formed by valve cover and inner surface of barrel, where striker is installed with the possibility of displacement, and idle run chamber arranged inside barrel coaxially to working travel chamber, circular chamber, jacket with holes. Intermediate link is made of jacket and bushing, joined as a whole, mechanism of gas distribution is made of parts, which perform functions of box and seat, and also from cover and valve, inside jacket there is an expansion chamber formed by inner surface of jacket and jacket seal adjacent to external surface of barrel. Working travel chamber communicates with idle run chamber with the first axial hole arranged in inner part of barrel, and idle run chamber communicates with expansion chamber with the second axial opening arranged in outer part of barrel, box and seat of gas distribution mechanism are functionally combined and arranged in the form of valve barrel, and intermediate link is arranged with circular chamber formed as circular bore at the end of intermediate link inverted to handle. Intermediate link is arranged with circular chamber formed as circular bore at the end of intermediate link inverted to handle. Circular bore is also arranged between outer surface of intermediate link and inner surface of barrel and communicates with outer external surface of valve body. Valve body is equipped with bushing fixed on its external surface. There is a central hole arranged in valve body, as well as radial holes. There are crosswise slots communicated with circular chamber by means of circular bore arranged between opposite ends of valve body and valve cover. Valve is installed in area of slots crossing with the possibility to open-close central hole. Radial holes are communicated with chamber of working travel by means of joined holes arranged in valve body, in cover, in barrel bore and arranged along longitudinal axis between slots. Barrel bore communicates with chamber of working travel by means of hole arranged inside barrel between bore and part of working travel chamber, which is most remote from valve cover. Body is arranged from elastic material and is equipped with external ledges. Jacket seal comprises holes to exhaust spent air arranged longitudinally between external surface of barrel and seal of jacket and are inverted from handle.
EFFECT: simplified design, improved noise and vibration protection.
5 cl, 8 dwg
FIELD: machine engineering, namely manual percussion action machines such as electric hammers and perforators used in building, mining, machine engineering and other industry branches for making openings in building materials and rocks and also for breaking them.
SUBSTANCE: in percussion apparatus when guiding cylinder providing percussion action is arranged in limit axial position, opening is arranged outside zone 2R of working stroke of piston and outside zone H of air cushion, higher than working end of piston being in upper dead point. At idle stroke of percussion machine when guiding cylinder is in other limit axial position, striker is hold in front position due arrangement of opening in zone 2R of working stroke of piston directly near its working end when piston is in upper dead point. It provides short-time communication of air cushion with atmosphere.
EFFECT: enhanced reliability of idle stroke mode of percussion action machine.