EP2244859A2 - Dispositif piqueur a air comprime a commande variable - Google Patents
Dispositif piqueur a air comprime a commande variableInfo
- Publication number
- EP2244859A2 EP2244859A2 EP09704622A EP09704622A EP2244859A2 EP 2244859 A2 EP2244859 A2 EP 2244859A2 EP 09704622 A EP09704622 A EP 09704622A EP 09704622 A EP09704622 A EP 09704622A EP 2244859 A2 EP2244859 A2 EP 2244859A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- channel
- piston
- fluid
- channels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 230000037452 priming Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
- B25D9/16—Valve arrangements therefor
- B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/04—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/245—Spatial arrangement of components of the tool relative to each other
Definitions
- the invention relates to a variable-pressure compressed air puncture device.
- variable control piercing device whose distribution element, adjacent and coaxial with the cylinder, comprises an upper body and a lower ring housing a movable fluid distribution spool, the body being provided with multiple coaxial channels for conveying the fluid. fluid formed in the thickness of its wall. Nevertheless, this arrangement of channels formed in the body, coaxially with it, requires that the channels are of a reduced diameter to preserve the integrity of the body and that they are numerous to convey the desired fluid flow. This therefore requires complex and expensive machining of the distribution element of the piercing device.
- the aim of the invention is to overcome this drawback and proposes a variable-air-operated puncture-type device comprising a cylinder and piston assembly for actuating a piercing element, and a variable-control distribution part for compressed air.
- cylinder and piston assembly the dispensing part comprising an upper body, a lower ring and a movable fluid distribution slide slidably mounted between the body and the ring, characterized in that the dispensing part is housed in the cylinder of the cylinder and piston assembly, at its upper part and coaxially with it, the variable fluid control is housed in the head of the cylinder closing the upper part of the cylinder, being connected to a fluid supply section, and said upper part of the cylinder has two channels for conveying the compressed air in sealed communication with the dispensing part by radial channels of this coaxial, external and adjacent thereto, one of the feeder channels being more particularly intended for feeding the cylinder and piston assembly in connection with the feed section and the control part.
- Said routing channel is naturally formed outside the dispensing part and advantageously communicates with low play and in a sealed manner with radial channels formed in the body and the ring of the dispensing part.
- Said routing channel may extend coaxially and adjacent to the dispensing portion, along the length thereof, and be groove-shaped rotated with its opening to said radial channels of the dispensing portion.
- the section of this groove advantageously half-cylindrical, may be relatively large, thus being able to pass a relatively large fluid flow.
- this arrangement avoids forming in the body of the distribution portion coaxial channels, difficult to machine and multiple to increase the flow rate of the fluid, requiring only the machining of an internal groove on the wall of the cylinder, in its upper part adjacent to the dispensing part, and the machining of the radial channels in the dispensing part without limiting their section to the thickness of the body, this machining being significantly simplified relative to that of the comparable device of the prior art and further not limiting the section of the radial channels of the distribution part.
- the variable fluid control is housed in the head of the cylinder closing the upper part of the cylinder, being connected to the fluid supply section by at least one flexible supply pipe, just below the operating handle of the piercing device, which is attached to said cylinder head.
- Said upper part of the cylinder advantageously comprises two channels for conveying the compressed air in communication with the dispensing part, coaxial thereto and preferably diametrically opposed relative to the axis of the cylinder and piston assembly, one of the routing channels being more particularly intended for supplying the cylinder and piston assembly, in connection with the supply section and the variable fluid control part, and with the movement control of the part of the drawer
- the distribution channel and the other delivery channel are adapted so as to alternately rotate the piston and exhaust the fluid at the lower level of the cylinder and piston assembly.
- the ring of the distribution part advantageously comprises at least one radial exhaust channel connected to a radial channel opening out from the upper part of the cylinder, able to be opened or closed by the movable spool and allowing the opening of the escapement of the fluid at the raising of the piston. It further comprises at least one open drawer lift control channel in the lower position of the piston connected to a control channel of the cylinder opening therein above the piston in the down position.
- the body of the distribution part advantageously comprises at least one radial exhaust channel, in a suitable position thereon to be opened or closed by the movable spool and to allow the opening the communication towards said relief channel of the piston to the downward movement of the latter without compressing the fluid at the bottom of the cylinder.
- the piercing device may comprise a small radial channel formed at the upper part of the body, said boot of the drawer control, allowing since stopping the piercing device directed upwards to push the movable drawer to the piercing element, and to establish the pressure in the cylinder, at the command, to start the movement of the piston.
- the piercing device according to the invention can operate at high pressure of compressed air (7 bars for example) or at low pressure (less than 2 bars) by increasing the sections of the channels to obtain a similar service effect, or between both.
- FIG. 7 is a perspective view in section of the dispensing portion of the piercing device.
- the piercing device 1 essentially comprises a cylinder-piston assembly 5 for actuating a lower piercing element 7, a distribution part 9 for compressed air (at 7 bar) and an upper head 1 1 closing the cylinder 13 of the cylinder-piston assembly 5.
- the dispensing part 9 has a cylindrical shape that is coaxial with the cylinder 13, comprising a cylindrical upper body 15 and a lower ring 17 that is sealed (by interlocking) to the body 15, and a movable cylindrical spool 19 mounted sliding with low play and in a leaktight manner. , on a short stroke (about 1 cm), between the body 15 and the ring 17.
- the upper head 1 1 is provided with an upper D-shaped operating handle 21 of the piercing device.
- the handle 21 comprises a trigger 23 for controlling the piercing device 1, able to be pressed in a variable manner by the operator to allow variable control of the piercing device 1.
- This trigger 23 in operating position opens more or less a device compressed air supply valve, which is movably mounted in the head 1 1 relative to a valve seat 27 of a fluid supply section 29 connected by a flexible pipe 31 laterally to the head 1 1.
- the dispensing part 9 is housed in the upper part 33 of the cylinder 13 close to the upper head 1 1 carrying the operating handle.
- the ring 17 and the body 15 being substantially of the same external diameter as the cylinder 13, the upper part 33 of the latter is slightly enlarged with a recess 35 relative to the body of the cylinder 13, a diameter greater than that of the body of cylinder 13 to contain the dispensing portion 9.
- This upper portion 33 is provided with two longitudinal channels coaxial with the cylinder 13, 37, 39, diametrically opposed and extending along the length thereof. These channels 37, 39
- FIG. 7 have a half-cylindrical (groove-shaped) section open on the body 15 and the ring 17 of the dispensing part.
- the upper channel 37 (above the axis of the cylinder in the drawing) is connected to an upper longitudinal channel 41 extending in the thickness of the cylinder body 13 and along its length to the bottom of the latter.
- This channel 41 is said relief channel of the piston 3 allowing it to return to the upper portion 33 of the cylinder when it reached the bottom 43 of the cylinder. It also allows, as previously mentioned, the escape of the air under the piston 3 in the stroke of the piston towards the bottom 43 of the cylinder, via two radial outlets or radial channels 45 provided in the body 15 and suitably opened by the movable drawer 19.
- the other longitudinal channel 39 of the upper part 33 of the cylinder or lower longitudinal channel 39 is connected mainly to a radial channel 47 of the body for supplying compressed air to the cylinder, to a small radial channel 49 of the body for the control of the movement of the slide 19 and other radial auxiliary channels of the body 15 specified thereafter.
- the ring 17 and the body 15 each comprise two radial exhaust holes or channels 51, 45 and in communication with corresponding radial through-holes of the cylinder 13.
- the exhaust holes 51 of the ring are open at the raising of the piston 3 and simultaneously that of the drawer 19 to decompress the upper chamber 53 of the cylinder (above the piston).
- the exhaust holes 45 of the body 15 allow the descent of the piston 3, conversely, the decompression of the lower chamber 55 of the cylinder
- the operation of the piercing device 1 according to the invention is now described. It depends on the movement of the movable slide 19 which controls the circulation of the fluid. This displacement is related to certain surfaces of the drawer in contact with the fluid, the squaint will participate in combination with the displacement of the drawer. These surfaces respectively correspond to the lower edge surface Sl of the drawer, to an upper shoulder surface S2 of a drawer control chamber 57, delimited between the body 15 and the drawer 19 and in communication with a control channel 59 longitudinal of the ring (itself in communication with a longitudinal channel 60 of the cylinder) and said radial control channel 49 of the body, and an upper edge surface S3 of the slide 19.
- the fluid arrives from this channel in the cylinder chamber through an annular groove 61 formed in the body 15, which facilitates its routing.
- the fluid pressure is applied to said surfaces S1, S2 and S3 and as S1 + S2> S3, the slide 19 initiates an upward movement.
- the spool 19 rises (FIG 2) and releases the exhaust holes 51 of the ring 17, thus losing the control pressure on Sl and S3 on the spool, but the pressure is kept on the surface S 2 by the spooling channel.
- control 49 of the ring 17 and therefore the drawer 19 continues to go up to the upper stop.
- the feed groove 61 is then closed (FIG 3) by the slide 19, which opens a channel 62, 63 of the body by a substantially central peripheral groove 65 and communicates the fluid to the relief channel 41.
- the piston cylinder 3 rises and the air of the upper chamber 53 is evacuated by the open holes 51 of the ring 17.
- the slide 19 and the piston 3 will fall to gravity stop towards the head 1 1 of the cylinder.
- S2 ⁇ S3 the slide 19 is pushed towards the piercing element 7, which initiates the cycle of movement of the piston 3 as shown in Figures 4 to 6 and 1 to 3.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Actuator (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Bridges Or Land Bridges (AREA)
- Special Spraying Apparatus (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compressor (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0800201A FR2926237B1 (fr) | 2008-01-15 | 2008-01-15 | Dispositif piqueur a air comprime a commande variable. |
| PCT/FR2009/050043 WO2009092956A2 (fr) | 2008-01-15 | 2009-01-13 | Dispositif piqueur a air comprime a commande variable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2244859A2 true EP2244859A2 (fr) | 2010-11-03 |
| EP2244859B1 EP2244859B1 (fr) | 2011-12-07 |
Family
ID=39615693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09704622A Not-in-force EP2244859B1 (fr) | 2008-01-15 | 2009-01-13 | Dispositif piqueur a air comprime a commande variable |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8720601B2 (fr) |
| EP (1) | EP2244859B1 (fr) |
| AT (1) | ATE536235T1 (fr) |
| ES (1) | ES2377449T3 (fr) |
| FR (1) | FR2926237B1 (fr) |
| WO (1) | WO2009092956A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2926237B1 (fr) | 2008-01-15 | 2010-06-11 | Sullair Europ | Dispositif piqueur a air comprime a commande variable. |
| CN104476504A (zh) * | 2014-11-25 | 2015-04-01 | 重庆戴卡捷力轮毂制造有限公司 | 一种用于压铸机清炉的气镐 |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US947861A (en) * | 1902-05-13 | 1910-02-01 | Thomas H Dallett And Company | Pneumatic tool. |
| US932421A (en) * | 1908-09-08 | 1909-08-24 | Chester B Albree Iron Works Company | Valve system for hammers. |
| US973378A (en) * | 1910-01-03 | 1910-10-18 | Company Alexanderwerk A Vonder Nahmer Aktien Ges | Pneumatic hammer. |
| US996889A (en) * | 1910-06-30 | 1911-07-04 | Henry Schumacher | Pneumatic hammer. |
| US1247080A (en) * | 1915-09-22 | 1917-11-20 | Charles Christiansen | Pneumatic tool. |
| US1332845A (en) * | 1917-04-02 | 1920-03-02 | Keller Pneumatic Tool Company | Pressure-fluid-actuated mechanism |
| US1329774A (en) * | 1918-04-27 | 1920-02-03 | Keller Pneumatic Tool Company | Pressure-fluid-actuated tool |
| US1557777A (en) * | 1920-04-15 | 1925-10-20 | George Oldham And Son Company | Pneumatic tool |
| US1528781A (en) * | 1921-08-03 | 1925-03-10 | Ingersoll Rand Co | Pneumatic hammer |
| US1637001A (en) * | 1925-11-03 | 1927-07-26 | Denver Rock Drill Mfg Co | Fluid-operated tool |
| US1707325A (en) * | 1926-02-01 | 1929-04-02 | William H Keller Inc | Pressure-fluid-operated tool |
| CH227392A (de) * | 1939-02-04 | 1943-06-15 | Stahlwerk Mark Wengern Aktieng | Pressluftschlagwerkzeug mit Schieber-Steuerung. |
| US2254695A (en) * | 1940-04-04 | 1941-09-02 | Ingersoll Rand Co | Valve mechanism for rock drills |
| US2275102A (en) * | 1940-08-24 | 1942-03-03 | Flannery Bolt Co | Telltale hole opener for staybolts |
| DE719265C (de) * | 1940-11-24 | 1942-04-02 | Krupp Ag | Rohrschiebersteuerung |
| US2415521A (en) * | 1944-08-01 | 1947-02-11 | Chicago Pneumatic Tool Co | Distributing valve for percussive tools |
| DE1184304B (de) * | 1960-01-22 | 1964-12-31 | Korfmann Gmbh Maschf | Verfahren zum Betrieb eines Abbauhammers und Abbauhammer zur Durchfuehrung des Verfahrens |
| US3060894A (en) * | 1960-02-29 | 1962-10-30 | Ingersoll Rand Co | Rock drill |
| US3167135A (en) * | 1961-11-16 | 1965-01-26 | Ingersoll Rand Co | Anvil impact tool |
| GB2155842B (en) * | 1984-03-16 | 1987-08-05 | Rizhskij Polt Inst | Pneumatic hammer |
| FR2926237B1 (fr) | 2008-01-15 | 2010-06-11 | Sullair Europ | Dispositif piqueur a air comprime a commande variable. |
-
2008
- 2008-01-15 FR FR0800201A patent/FR2926237B1/fr not_active Expired - Fee Related
-
2009
- 2009-01-13 ES ES09704622T patent/ES2377449T3/es active Active
- 2009-01-13 US US12/812,845 patent/US8720601B2/en active Active
- 2009-01-13 WO PCT/FR2009/050043 patent/WO2009092956A2/fr not_active Ceased
- 2009-01-13 EP EP09704622A patent/EP2244859B1/fr not_active Not-in-force
- 2009-01-13 AT AT09704622T patent/ATE536235T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009092956A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US8720601B2 (en) | 2014-05-13 |
| ATE536235T1 (de) | 2011-12-15 |
| ES2377449T3 (es) | 2012-03-27 |
| EP2244859B1 (fr) | 2011-12-07 |
| FR2926237A1 (fr) | 2009-07-17 |
| FR2926237B1 (fr) | 2010-06-11 |
| US20110174512A1 (en) | 2011-07-21 |
| WO2009092956A2 (fr) | 2009-07-30 |
| WO2009092956A3 (fr) | 2009-10-01 |
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