Impact tool

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.



 

Same patents:

FIELD: mining.

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Pneumatic hammer // 2423221

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

Air hammer // 2410234

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

Impact device // 2400350

FIELD: construction.

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

Pneumatic chipper // 2396428

FIELD: construction.

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.

2 dwg

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