Pneumatic striking mechanism

FIELD: machine engineering.

SUBSTANCE: pneumatic striking mechanism includes a cylindrical body with outlet channels, a ring flange with a through central hole, a working tool with a stem, a stepped striker with rod portion installed in the central hole of the ring flange with piston portion with channels-grooves, constantly located in through axial hole of the stepped striker, a controlled circular chamber of the working stroke between inner surface of the cylindrical body and the striker rod portion, a cup fixed relative to the cylindrical body with a channel for supplying air from the network into the chamber of the network air, a circular distributing chamber located in the bushing of cylindrical body forming a ring bridge from the side of controlled ring chamber of the working stroke and limiting movement of the step striker, an idle stroke chamber from the side of the working tool shank held by the spring relative to the cylindrical body. There is a channel-groove or channel-flat provided on the rod portion of the stepped striker under inclination to its longitudinal axis. Said inclined surface has a curvature not lower than the second order, and the cross section of the channel-groove or channel-flat is widening towards the end of the rod portion of striker with outlet into circular distributing chamber.

EFFECT: reduced air back pressure in the working stroke chamber at the end of the idle stroke, increased air pressure at the beginning of the working stroke, impact energy and impact frequency of pneumatic striking mechanism are increased.

2 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: invention relates to building industry and mining, in particular to the pneumatic devices with impact action. The percussion mechanism includes cylindrical casing with inlet channels, ring flange with through central hole, work tool with shank, step striker with stock part, rod with piston part installed in the central hole of the ring flange, piston part is permanently in the through axial hole of the step striker, ring chamber of the pneumatic buffer, bushing of the cylindrical casing with hole for the stock part passage, creating from side of the ring chamber of the pneumatic buffer a ring bridge limiting movement of the step striker, secured relatively to the cylindrical casing of the sleeve with channel for ail feeding, ring distributing chamber in the bushing of the cylindrical casing, chamber of network air from the side of the ring flange, idle stroke chamber at side of the work tool shank, held by the spring relatively to the cylindrical casing. Channel-slot on the side surface of the rod piston part interacting with the through axial hole in the step striker is made helical.

EFFECT: reduced air backpressure in the idle stroke chamber at and of the work stroke, increased impact energy, and frequency of impact of the pneumatic striker.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing while circuit air chamber is located on circular flange side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channel-groove on rod piston part side surface features varying geometrical cross-section increasing from piston part side surface on rod side to the piston part end on the side of through axial bore of stepped hammer.

EFFECT: decreased counter pressure of air in idle stroke chamber, higher power of impact and frequency of impacts.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing. Circuit air chamber is arranged on circular filter side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channels-grooves are made on rod piston part side surface to interact with steeped hammer through axial bore. Said channels-grooves feature variable lengths and total area of cross-sections increasing at area from full diametrical section of rod end part to end part end in through axial bore of stepped hammer.

EFFECT: decreased idle stroke chamber air counter pressure, and resistance to hammer stroke, higher power of impact and impact frequency.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing while circuit air chamber is located on circular flange side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channel-flat on rod piston part side surface features varying geometrical cross-section increasing from piston part side surface on rod side to the piston part end on the side of through axial bore of stepped hammer.

EFFECT: decreased counter pressure of air in idle stroke chamber, higher power of impact and frequency of impacts.

1 dwg

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

The invention relates to mechanical engineering and can be used as a hand tool for breaking rock, concrete, lining furnaces, metal cutting shears and applied in mining and construction, as well as in the metallurgical industry

The invention relates to mining and construction

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: mechanics.

SUBSTANCE: pneumatic jackhammer contains the case with antivibration handle and compressed air feed means, a duct arranged in the case to axially move therein, a shock absorber, a working member and a vibration damper. The duct is made up of two cups. The first cup open end accommodates a detachable cover. The second cup bottom has an orifice representing a guide. Note that the second cup outer surface is furnished with a circular groove, its both sides being provided with circular chutes receiving O-rings sealing the gap between the second cup outer surface and the case inner surface. The working member shaft idle end is furnished with an axial bore. The working member bottom is provided with through holes to communicate working member axial bore space with its outer surface. The working member working end can reciprocate through the orifice made in the second cup bottom. The working member idle end is furnished with a collar to interact with the second cup inner surface. The vibration suppressor represents a cylindrical sleeve with a through axial hole made in the first cup and spring-loaded relative to the first cup bottom and the detachable cover.

EFFECT: minimum level of vibration.

4 cl, 2 dwg

FIELD: engines and pumps, mining operations.

SUBSTANCE: device comprises a supply air chamber, a device cutting in the compressed feed into the supply air chamber, a hollow cylinder housing a striker separating the cylinder space into idle cycle and running cycle chambers, an accumulation chamber communicating continuously, via passageway, with the running cycle chamber and arranged on the cylinder end face on the said running cycle chamber side, a constantly open throttle operation chamber inlet channel, an outlet channel furnished in the cylinder side wall, a working tool with a tail. The aforesaid device has a barrel provided with an annular collar and a flow-through pressure augmentor chamber arranged on the idle cycle chamber side communicating continuously, via the cover throttle inlet channel, annular groove and the cylinder lengthwise channel, with the supply air chamber, and, intermittently, via the pressure augmentor radial channel and the cylinder annular groove, with the idle operation chamber. The striker is furnished with the throttling start channel. The aforesaid barrel bottom faces the cover and bears, by its annular collar, on the cover collar to form the supply air chamber, the distance from the pressure augmentor channel exit to the outlet channel being smaller than the striker length.

EFFECT: higher effect on the processed medium.

7 cl, 6 dwg

FIELD: mining.

SUBSTANCE: invention relates to the construction and mining machines with impact action for fragmentation of rocks and frozen ground by heavy airbreaking machines and to the plugger drills. The device contains the chamber of the network air, prechamber, quill cylinder with installed hammer which separates the cylinder cavity to chambers of the idle and working stroke, head with collar, permanently open inputting throttle conduit made in the tube and connecting the network chamber with the idle chamber, cartridge with the annular collar faced to the head collar, lentic afterburning chamber in the cylinder wall from the idle chamber side, radial afterburning conduit in the cylinder wall which connects the lentic afterburning chamber with the idle chamber, discharge ports in the cylinder sidewall and the operating device with the tail piece. At the level of the afterburning conduit, the hammer and the cylinder have the inner groove chambers which are periodically communicated between each other via the bypassing conduit so as the length of the inner groove chamber on cylinder is less than the hammer's length. On the side tube surface, the radial channel is made to communicate periodically the inner groove chamber in the hammer with the tube longitudinal throttle conduit which is provided with the triggering throttle conduit from the device's side.

EFFECT: impact effect of pneumatic device on treated medium is increased.

2 cl, 2 dwg

FIELD: mechanics.

SUBSTANCE: invention is related to construction and mining impact machines. Mechanism includes network air chamber, pre-chamber, hollow cylinder with striker splitting cylinder cavity into working and idle stroke chambers, lid with bead at one cylinder end from working stroke chamber side, tube with continuously opened inlet duct. Inlet duct connects pre-chamber with idle stroke chamber. Mechanism is also comprised of a cup with circular bead directed to lid bead, circular static boosting chamber in cylinder wall from the side of idle stroke chamber. Boosting duct in cylinder wall is in the form of radial channel connecting static boosting chamber with idle stroke chamber. Boosting duct connects also outlet ducts in cylinder walls and operating tool with tongue. Striker is provided with internal and external recessed chambers interconnected by bypass duct and so that the distance from cutoff edge of boosting duct shear to outlet duct is more than the length of external recessed chamber on striker. Side surface of tube is ensured with radial channel connecting internal recessed chamber in striker with longitudinal tube ducts. From the side of operating tool longitudinal duct of tube is provided with start-up throttle.

EFFECT: increase of impact effect to treated medium.

1 dwg

FIELD: mechanics.

SUBSTANCE: hammer consists of a body with radial outlet and central channels, lid with central hole, striker with axial through channel splitting central channel into working stroke and idle stroke chambers, tube with dead bead from the side of cover. Cover is provided with radial and longitudinal channels and installed coaxially in central channel and displaced in axial through channel of striker and central hole of lid. Cup in the hammer is tightly installed as regard to hammer body forming circular accumulating chamber, which contacts with working stroke chamber by means of radial bypass channel in hammer body. Network air pre-chamber with air supply channel continuously interacts with compressed air network. Hammer also includes air baffling ring with outlet slotted channel, operating tools with bead interacting with body end, operating tool tongue, cap to prevent operating tool from dropping out from central body channel. Hammer body is provided with groove from the side of cup and lid is located in groove to enable reciprocal movements.

EFFECT: reduction of back pressure forces in working stroke chamber and improvement of hammer vibration indicators.

2 dwg

FIELD: invention refers to strengthening element for fixing in short, not under core hole, mode and adjusting instrument for fixing similar strengthening element.

SUBSTANCE: mentioned strengthening element has rod, which on one end has thrust cone, which expands in direction to rod, and non-split, tubular clenched bushing through which rod passes and which for expansion and fixing in blind hole is fulfilled with possibility of its pulling on thrust cone so, that it expands in face field turning to thrust cone. Hollow conic expansion of clenched bushing has more sharp conic angle then thrust cone. Mode of fixing of strengthening element in opening is in that clenched bushing is pulled on thrust cone by way of transfer on clenched bushing of vibrating movements in ultrasound diapason of frequencies. Fixing with such mode is light and lightly loads the place of fixing. Adjusting instrument for strengthening element has central rod entering into axial opening of thrust cone at installation on face side of clenched bushing. At that adjusting element has tubular rim circling around central rod for installation on face side of clenched bushing. External diameter of rim is no larger then external diameter of clenched bushing.

EFFECT: increases reliability of strengthening.

13 cl, 13 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 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

Impact tool // 2535426

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

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.

2 dwg

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