EP0998376B1 - Dispositif de percussion pour la liberation par percussion d'objets bloques - Google Patents
Dispositif de percussion pour la liberation par percussion d'objets bloques Download PDFInfo
- Publication number
- EP0998376B1 EP0998376B1 EP98939535A EP98939535A EP0998376B1 EP 0998376 B1 EP0998376 B1 EP 0998376B1 EP 98939535 A EP98939535 A EP 98939535A EP 98939535 A EP98939535 A EP 98939535A EP 0998376 B1 EP0998376 B1 EP 0998376B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- percussive
- impact
- tool
- piston
- operating
- 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.)
- Expired - Lifetime
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Images
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
-
- 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
- B25D2250/171—Percussive pulling action of tools for extraction of elements
Definitions
- the invention relates to an impact device according to the preamble of claim 1.
- the invention relates to an impact device, which in one Hammer and / or hammer drill can be used.
- the tool e.g. a chisel or a drill, wedged or jammed in the rock.
- the tool can usually prevent it, it is with demolition work with a large impact hammer not always possible even for the specialist, wedging or jamming the chisel.
- Getting a wedge free Tool is usually difficult because it is the only way to do it can that with a second chisel, with certain hammer construction only hit the clamped tool with a second hammer.
- A, 5,485,887 is a striking device with an axially back and forth Movable percussion piston having known impact generating device.
- the percussion piston causes a tool in an operating impact direction acted upon, while in a free stroke state a blow of the Percussion piston can be transferred to the tool in such a way that it is in an operating impact direction reverse direction of impact is applied.
- the reverse the direction of impact is determined by the displacement of one surrounding the percussion piston outer piston reached purely pneumatically.
- the invention has for its object to provide a striking device with which is clearing a jammed tool in a simple and time-saving manner Way can be done.
- a striking device with the features solved by claim 1.
- Advantageous further developments of the invention are in the sub-claims defined.
- Such a striking device can be particularly advantageous insert in a hammer and / or hammer drill.
- a striking device with an axially reciprocable Percussion piston having impact generating device wherein in a Operating state by the percussion piston a tool in an operating impact direction can be acted upon, characterized in that in a free hit state a blow of the percussion piston via a blow converting device on the Tool is transferable that it is in a direction reversed to the direction of operation Direction of discharge can be applied.
- an impact device in which the impact energy of the percussion piston belonging to the percussion generating device can be used to knock the clamped tool out of the rock, by pushing it in a direction that is normal Direction of impact is directed in the opposite direction.
- the percussion piston usually strikes in the direction of the operational impact directly or via an intermediate striker on the Tool on.
- the impact converting device it is possible to move the Tapping the percussion piston either in the direction of the operating stroke or in the direction of the blow and to feed the tool in the form of a blow in the direction of the blow.
- An embodiment of the invention is particularly advantageous in which the transmission as well as a directional change of the field via the field converting device takes place when the percussion piston the impact converting device in the operating impact direction applied.
- the percussion piston is usually designed so that it is in the direction of the operating stroke can take the greatest loads because he moves in hits the tool in this direction. Therefore, it is also the one to be struck necessary loads have grown, since there are rather lower forces and impacts than are required in the operating state.
- the striker must be a conventional striker in terms of the lay geometry and strength are not redesigned. Rather can achieved the solution according to the invention by adding the impact conversion device become.
- the impact converting device is a deflecting device and a Has impact transmission device
- the impact deflector one around has an axis of rotation pivotable lever, which by the percussion piston can be acted upon at a first lever end in the operating impact direction and at one with respect to the axis of rotation opposite and accordingly in the direction of the blow movable second lever end with the impact transmission device is coupled
- the impact transmission device one in the free-impact direction movable plunger and a tool lock attached to the plunger which transmits the blow to the tool.
- the impact deflection device is used to discharge and into the Directional impact direction and record one in the opposite direction To deflect the direction of the blow.
- the redirected Impact is transferred to the tool by the impact transmission device which can then be cleared.
- the deflection lever belonging to the impact deflection device is advantageous can be acted upon directly by the percussion piston moving in the operating impact direction.
- the impact deflection device has between the impact piston and the bellcrank one between an operating position and a free stroke position sliding lever pivotable about one of its ends the impact of the percussion piston in the operating impact direction on the bell crank is transferable.
- the sliding lever enables a transmission of the Impact from the percussion piston to the bell crank with a power transmission particularly advantageous geometry.
- the slide lever can be between shift the operating position and the free stroke position and thus serves as a switch between the operating state and the free stroke state that the Operator can choose freely by adjusting the slide lever.
- the impact generating device has a striking mechanism with a one-way air spring.
- This known per se Striking mechanism has the advantage of great robustness and simple construction and has proven its worth in practice. Without a constructive change of the striking mechanism is required, the striking device can be added by adding the Features described above can be supplemented in the manner according to the invention.
- the transmission of the Strikes over the striking converter when the striker hits the striking converter applied in the direction of the blow in the direction of the blow.
- the Percussion pistons - in contrast to the embodiments described above - already in the direction in which the tool is to be released. This has the Advantage that no impact deflection device is required.
- a particularly advantageous embodiment is characterized in that that the field converting device has a field transmission device; the Impact transmission device can be acted upon by the percussion piston in the free-impact direction is and the blow to a lying on the holder of the tool Transmits position; and that on the impact transmission device a tool lock is attached, which transmits the blow to the tool.
- This arrangement enables the impact energy from which is already in the free-impact direction tapping moving piston and in the opposite Direction arranged tool can be fed to clear this.
- the impact transmission device on one, seen in the operating impact direction, behind the percussion piston lying point can be acted upon by the percussion piston in the direction of the blow is when the percussion piston moves in the direction of the blow.
- An embodiment in which the impact generating device is particularly advantageous has a striking mechanism with double-acting air spring.
- double Air springs are known per se and have the advantage of a reliable start from standstill and a protection of the material. Because the percussion piston in the case of a double-sided air spring in a defined manner in the direction of free swing moves, its impact energy can be reliably tapped and fed to the tool become.
- the Tool lock has a locking lever that one to the tool belongs behind the covenant.
- a locking lever is common already provided in known impact devices to the tool in the device to secure. For this reason, there are no additional components for transmission of the impact energy on the tool is required for striking. Indeed the locking lever must be dimensioned sufficiently to the dynamic To be able to withstand loads during clearing.
- the impact device between the operating state is particularly advantageous and the free hit state can be switched manually.
- the operator can at any time determine yourself in which direction the impact takes place.
- the manual Switching is also possible with double-sided air springs, in which one between an electric motor and a crank mechanism that excites the air spring Coupling can be controlled via a control tappet. If necessary, the Clutch can be mechanically bridged to the impact device in neutral to be able to switch to the free stroke state.
- the impact device according to the invention can be particularly advantageously in one Use a hammer and / or hammer drill.
- Fig. 1 shows a partial section through the striking device of a hammer, at the elements of a percussion generating device known per se for reasons have been omitted for simplification. Above all, one is not shown Electric motor, a crank mechanism driven by the electric motor and one by the Crank drive axially movable drive piston, which is in a hollow cylindrical recess a percussion piston 1 is axially movable.
- the percussion piston 1 is arranged in an axially movable manner in a housing 2 of the hammer, and is driven between the drive piston by the drive piston and a closed end face 3 of the percussion piston 1 forming air spring.
- the percussion piston 1 thus follows the forced movement of the crank mechanism coupled drive piston.
- a tool 4 for example a chisel
- the locking lever 6 is by a not shown Spring applied so that a nose 7 constantly engages behind the collar 5 and holds the tool 4 in the housing 2. Only when the locking lever is actuated 6 the operator can pivot the nose 7 out of the movement path of the collar 5 and the tool 4 can be removed from the hammer. This Arrangement is known per se and will therefore not be discussed further.
- Fig. 2 shows a substantially similar section, in which the tool 4 in Is idle position and has slipped out of the housing 2 that the collar 5 rests on the nose 7 of the locking lever 6.
- the percussion piston 1 can be the tool 4 no longer reach, so that no impact can be transferred to the tool 4 is. It is only when the tool 4 is placed on the rock to be machined Tool 4 pushed back into the hammer and reaches that shown in Fig. 1 Position.
- the striking device has a striking device to redirect the output from the percussion piston 1, first in Operating field direction (arrow direction B) directed field in free stroke direction (Arrow direction F) and a field transmission device for transmitting the now on the tool 4 in the direction of the blow.
- Part of the impact deflection device is a slide lever 8, which at one end is pivotally attached to a pivot 9 and with its other end in the 1 protrudes from the housing.
- the slide lever 8 has an elongated hole 10 on the attachment with the pin 9 and is thereby between the operating position shown in FIG. 1 and a free stroke position shown in FIG. 2 displaceable.
- the positions can be changed by pressing the Slide lever 8 can be changed from the outside. In the operating position shown in Fig. 1 penetrates one end of the tool 4 a through opening 11 of the Slide lever 8. The slide lever 8 is thus without function in the operating state.
- a bell crank 12 is arranged, approximately in its Center is pivotally held in the housing 2 about a pivot pin 13. On his opposite end of the bell crank 12 by means of a pin 14 with a the plunger 15 belonging to the impact transmission device. Furthermore points the bell crank 12 has a through opening on one side of the pivot pin 13 16, through which the end of the tool 4 can be passed without this Touch tool 4 and the bell crank 12.
- the plunger 15 is longitudinally movable in the housing 2 and carries on the the pin 14 opposite end of the locking lever 6 on the plunger 15 arranged pivotably and is also longitudinally movable with this.
- FIG. 2 shows a section through the impact device Fig. 1 shows, wherein the striking device is in a free hit state. To do this, the operator has lifted the hammer off the rock to be processed, so that the tool 4 slides into the idle position shown in Fig. 2 until it at his Bund 5 is held by the nose 7.
- the percussion piston 1 which is initially in the idle position, is also somewhat in the Through opening 11 can have slipped in and the air spring usually should be vented, is pushed back by the slide lever 8, now comes back in the operating position and hits the striking surface 17 in the same way, as was the case with tool 4 previously.
- the impact of the percussion piston 1 is achieved by pivoting the slide lever 8 around the pivot pin 9 via a nose 8a onto the outer end of the bell crank 12 transfer. Since the bell crank 12 is pivotally attached to the pivot 13, accordingly, the end of the stroke opposite the impact initiation moves Bell crank 12 with the pivot pin 14 in the reverse direction, i.e. in free strike direction F. The pin 14 takes the plunger 15 and thus also the locking lever 6 and the secured collar 5 of the tool 4, so that the tool 4 is applied in the free stroke direction F and after a few strokes should be released from the clamped state again.
- blow is from the percussion piston or through an additional one Intermediate piece can be transferred to the impact deflection device. It is also obvious that the impact energy in operating direction B on the one hand from the percussion piston 1 directly to the tool 4 or via an intermediate, strikers not shown can be transferred.
- FIG. 3 shows schematically another embodiment of the invention, in which instead the single-acting air spring from FIGS. 1 and 2 a double-acting Air spring is used.
- FIG. 3 shows a part of a crank rod 20 that has a drive piston 21 moved back and forth.
- a percussion piston 22 follows the movement of the Drive piston 21, one in front and one behind the percussion piston 22
- Air spring 23 forms. Hence the name "double air spring”.
- the percussion piston 22 strikes a tool 24 in a known manner.
- the percussion piston 22 can also on a not shown, between the Open the tool 24 and the striking piston 22 arranged on the striker.
- the percussion piston 22 has an extension at its rear end 25 which the drive piston 21, seen in operating direction B, pierces to the rear. Behind the rear end 25 is a hook 26 as a impact transmission device Serving plunger 27 arranged from the rear end of the Percussion piston 22 can be acted upon in a movement of the percussion piston in the free-stroke direction F. is.
- the impact energy in the free impact direction F is via the hook 26 and the plunger 27 via a locking element 28, which is only shown in sketch form transferred to a collar 29 of the tool 24 so that the tool 24 is struck free can be.
- the impact device should be provided with a clutch, the power flow between the drive and the double air spring interrupts when the tool 24 assumes the idle position, of course, must be bridged the clutch or a switch for manually actuating the clutch his. thus the air spring hammer mechanism even when the tool is idle 24 in Operation can be put.
- the locking of the federal government 29 of the tool 24 does not have to be done directly by the locking element 28 essentially used to transmit the impact energy done in a hammer. Rather, it can be expedient to have a separate, in Fig. 3rd To provide locking of the tool 24, not shown. In this case it would Locking element 28 exclusively for transmitting the impact energy in the direction of the blow F serve. The locking of the tool is therefore more of an additional function to watch the field transfer.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Claims (11)
- Dispositif de percussion comportant un dispositif générateur de percussions comportant un piston de percussion (1 ; 22) déplaçable axialement en sens alternés, dans lequel, dans un état de fonctionnement, un outil (4 ; 24) peut être sollicité dans un sens de percussion de fonctionnement (B) par le piston de percussion, et, dans un état de percussion de libération, une percussion du piston de percussion (1 ; 22) peut être transmise à l'outil (4 ; 24) de manière que celui-ci puisse être sollicité dans un sens de percussion de libération (F) inversé par rapport au sens de percussion de fonctionnement, caractérisé en ce que le dispositif de percussion comporte un dispositif de conversion de percussion, la transmission ainsi qu'une inversion du sens de la percussion s'effectuant par l'intermédiaire du dispositif de conversion de percussion lorsque le piston de percussion (1) agit sur le dispositif de conversion de percussion dans le sens de percussion de fonctionnement (B).
- Dispositif de percussion selon la revendication 1, caractérisé en ce quele dispositif de conversion de percussion comporte un dispositif d'inversion de percussion (8, 9, 10, 11, 12, 13) et un dispositif de transmission de percussion (15, 6, 7) ;le dispositif d'inversion de percussion comporte un levier d'inversion (12) pouvant pivoter autour d'un axe de rotation (13), et qui peut être sollicité, à une première extrémité, dans le sens de percussion de fonctionnement (B), par le piston de percussion (1), et qui, à une deuxième extrémité, opposée à l'axe de rotation et en conséquence déplaçable dans le sens de percussion de libération (F), est couplé au dispositif de transmission de percussion ; et en ce quele dispositif de transmission de percussion comporte un poussoir (15) déplaçable dans le sens de percussion de libération ainsi qu'un verrouillage d'outil (6), fixé au poussoir, qui transmet la percussion à l'outil (4).
- Dispositif de percussion selon la revendication 2, caractérisé en ce que le levier d'inversion (12) peut être directement sollicité par le piston de percussion (1) se déplaçant dans le sens de percussion de fonctionnement (B).
- Dispositif de percussion selon la revendication 2, caractérisé en ce que le dispositif d'inversion de percussion comporte, entre le piston de percussion (1) et le levier d'inversion (12), un levier coulissant (8) pouvant coulisser entre une position de fonctionnement et une position de percussion de libération et pouvant pivoter autour de l'une de ses extrémités, par lequel la percussion du piston de percussion, agissant dans le sens de percussion de fonctionnement (B), peut être transmise au levier d'inversion.
- Dispositif de percussion selon l'une des revendications précédentes, caractérisé en ce que le dispositif générateur de percussion comporte un mécanisme de percussion avec ressort pneumatique à simple effet.
- Dispositif de percussion comportant un dispositif générateur de percussions comportant un piston de percussion (1 ; 22) déplaçable axialement en sens alternés, dans lequel, dans un état de fonctionnement, un outil (4 ; 24) peut être sollicité dans un sens de percussion de fonctionnement (B) par le piston de percussion, et, dans un état de percussion de libération, une percussion du piston de percussion (1 ; 22) peut être transmise à l'outil (4 ; 24) de manière que celui-ci puisse être sollicité dans un sens de percussion de libération (F) inversé par rapport au sens de percussion de fonctionnement, caractérisé en ce que le dispositif de percussion est équipé d'un dispositif de conversion de percussion qui comporte un dispositif de transmission de percussion (26, 27, 28) avec un poussoir (27), déplaçable axialement dans une direction axiale de l'outil, lequel est couplé à une surface de percussion (26), sur laquelle peut agir le piston de percussion (22) et à un verrouillage d'outil (28) qui transmet la percussion à l'outil, la transmission de la percussion étant effectuée par le dispositif de conversion de percussion (26, 27, 28) lorsque le piston de percussion (22) sollicite le dispositif de conversion de percussion dans le sens de percussion de libération (F).
- Dispositif de percussion selon la revendication 6, caractérisé en ce que le dispositif de transmission de percussion peut être sollicité par le piston de percussion dans le sens de percussion de libération (F), en un point situé derrière le piston de percussion (22), vu dans le sens de percussion de fonctionnement, lorsque le piston de percussion se déplace dans le sens de percussion de libération.
- Dispositif de percussion selon l'une des revendications 6 ou 7, caractérisé en ce que le dispositif générateur de percussions comporte un mécanisme de percussion avec ressort pneumatique (23) à double effet.
- Dispositif de percussion selon la revendication 2 ou 6, caractérisé en ce que le verrouillage d'outil (6 ; 28) comporte un levier de verrouillage qui saisit de l'arrière un épaulement (5 ; 29) faisant partie de l'outil (4 ; 24).
- Dispositif de percussion selon l'une des revendications précédentes, caractérisé en ce que le dispositif de percussion peut être commuté manuellement entre l'état de fonctionnement et l'état de percussion de libération.
- Utilisation d'un dispositif de percussion selon l'une des revendications précédentes dans un marteau percuteur et/ou perforateur.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19731732 | 1997-07-23 | ||
DE19731732A DE19731732C2 (de) | 1997-07-23 | 1997-07-23 | Schlagvorrichtung zum Freischlagen festgeklemmter Gegenstände |
PCT/EP1998/003903 WO1999004937A1 (fr) | 1997-07-23 | 1998-06-25 | Dispositif de percussion pour la liberation par percussion d'objets bloques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0998376A1 EP0998376A1 (fr) | 2000-05-10 |
EP0998376B1 true EP0998376B1 (fr) | 2004-11-10 |
Family
ID=7836691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939535A Expired - Lifetime EP0998376B1 (fr) | 1997-07-23 | 1998-06-25 | Dispositif de percussion pour la liberation par percussion d'objets bloques |
Country Status (6)
Country | Link |
---|---|
US (1) | US6298923B1 (fr) |
EP (1) | EP0998376B1 (fr) |
JP (1) | JP4124564B2 (fr) |
DE (2) | DE19731732C2 (fr) |
ES (1) | ES2227870T3 (fr) |
WO (1) | WO1999004937A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123397A1 (de) * | 2001-05-14 | 2002-11-28 | Wacker Werke Kg | Schlag- und/oder Bohrhammer mit einer zum Freischlagen festgeklemmter Gegenstände geeigneten Schlagvorrichtung |
US11117249B2 (en) * | 2018-05-23 | 2021-09-14 | Illinois Tool Works Inc. | Powered fastener driving tool |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069537B (fr) * | 1959-11-19 | |||
US1024173A (en) * | 1910-10-10 | 1912-04-23 | Benjaman F Betts | Drill-extractor. |
US1042873A (en) * | 1912-03-05 | 1912-10-29 | Benjamin F Betts | Drill-extractor. |
US1202551A (en) * | 1914-09-16 | 1916-10-24 | Harvey Keith Mackenzie | Drill-extractor. |
US1213989A (en) * | 1916-08-31 | 1917-01-30 | William W Wilson | Drill-extractor. |
DE476024C (de) * | 1928-11-04 | 1929-05-15 | Demag Akt Ges | Vorrichtung zum Abstechen von Hochoefen |
DE1198763B (de) * | 1961-08-16 | 1965-08-19 | Willy Rosenthal | Druckmittelbetriebene Bohrstangenziehvorrichtung |
US3356166A (en) * | 1965-04-15 | 1967-12-05 | Gardner Denver Co | Percussive tool |
FR2330507A1 (fr) * | 1975-11-04 | 1977-06-03 | Montabert Roger | Machine de percussion |
ATE31334T1 (de) * | 1983-09-19 | 1987-12-15 | Simson & Partner | Vorrichtung zum rammen und ziehen. |
US5065823A (en) * | 1987-02-10 | 1991-11-19 | Abraham Gien | Extraction device for pneumatically actuated drilling tools |
ZA87943B (en) | 1987-02-10 | 1989-02-22 | Abraham Gien | Improvements relating to extraction device for pneumatically actuated drilling tools |
US4790392A (en) * | 1987-08-24 | 1988-12-13 | Clements James M | Soil sample core extraction tool |
EP0522190B1 (fr) | 1991-07-10 | 1995-04-12 | Ingersoll-Rand Company Limited | Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique |
DE59406589D1 (de) * | 1993-03-30 | 1998-09-10 | Integral Medizintechnik | Pneumatisches Schlagwerkzeug |
CH686837A5 (de) * | 1993-05-19 | 1996-07-15 | Klemm Guenter | Fluidbetaetigter Schlaghammer. |
SE509211C2 (sv) * | 1994-02-28 | 1998-12-21 | Berema Atlas Copco Ab | Handhållet tryckluftdrivet maskinspett |
US6003619A (en) * | 1998-05-28 | 1999-12-21 | Lange; James E. | Back driving automatic hammer |
-
1997
- 1997-07-23 DE DE19731732A patent/DE19731732C2/de not_active Expired - Fee Related
-
1998
- 1998-06-25 ES ES98939535T patent/ES2227870T3/es not_active Expired - Lifetime
- 1998-06-25 DE DE59812248T patent/DE59812248D1/de not_active Expired - Lifetime
- 1998-06-25 EP EP98939535A patent/EP0998376B1/fr not_active Expired - Lifetime
- 1998-06-25 US US09/380,991 patent/US6298923B1/en not_active Expired - Fee Related
- 1998-06-25 JP JP2000503966A patent/JP4124564B2/ja not_active Expired - Fee Related
- 1998-06-25 WO PCT/EP1998/003903 patent/WO1999004937A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE19731732A1 (de) | 1999-02-04 |
US6298923B1 (en) | 2001-10-09 |
JP4124564B2 (ja) | 2008-07-23 |
EP0998376A1 (fr) | 2000-05-10 |
DE59812248D1 (de) | 2004-12-16 |
ES2227870T3 (es) | 2005-04-01 |
JP2001510741A (ja) | 2001-08-07 |
DE19731732C2 (de) | 2001-02-22 |
WO1999004937A1 (fr) | 1999-02-04 |
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