EP0646056A1 - Verfahren und vorrichtung zum betätigen eines schlagwerkzeuges mittels pressluft. - Google Patents
Verfahren und vorrichtung zum betätigen eines schlagwerkzeuges mittels pressluft.Info
- Publication number
- EP0646056A1 EP0646056A1 EP93909977A EP93909977A EP0646056A1 EP 0646056 A1 EP0646056 A1 EP 0646056A1 EP 93909977 A EP93909977 A EP 93909977A EP 93909977 A EP93909977 A EP 93909977A EP 0646056 A1 EP0646056 A1 EP 0646056A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- inner rotor
- piston
- firing pin
- compression
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
-
- 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
- B25D9/06—Means for driving the impulse member
- B25D9/08—Means for driving the impulse member comprising a built-in air compressor, i.e. the tool being driven by air pressure
Definitions
- the invention relates to a method and an apparatus for actuating a Schlagwer tool, in particular a percussion drilling tool or chisel of a rotary or chisel hammer by means of a reciprocating piston moved by compressed air in a cavity and to a rotary hammer and a Sc lag chisel device, according to this Process or work with this device.
- An SC lag drilling machine in which a cylinder chamber guiding the percussion piston on different sides of the
- the invention has for its object to provide a method and a device for a simple drive of a reciprocating flying piston, the drive is largely vibration-free and relatively little effort.
- the method is therefore based on the principle that the compressed air is generated by means of a rotating external rotor and an internal rotor rotating at a relative speed, the two parallel axes of rotation being arranged eccentrically to one another and alternately during the rotation to produce the reciprocating movement radially offset portions of the outer circumference of the inner rotor, a compression and a suction space is formed by the compression space being created on one partial surface, while the suction space is generated on the other partial surface the cavity for the flying piston extends axially in the interior of the inner rotor and that the air from the compression space is pressed in by one or more first control channels into the cavity by on the facing partial surface of the outer circumference of the inner rotor near its one axial end on the radially offset part of the outer circumference of the inner rotor near its other axial end, one or more further control channels air is sucked out of the cavity into the suction chamber.
- a device for performing the method has in particular the features that in the rotating outer rotor an axially extending interior is formed with a constant elliptical cross-section, the central axis of which is offset parallel to the axis of rotation of the outer cylinder and in which the inner rotor is halfway there Speed as the outer rotor rotates, the two parallel axes of rotation of the outer and inner rotor are offset eccentrically, that the inner rotor has a small and a large outer diameter such that the large outer diameter almost corresponds to the smaller inner diameter of the elliptical interior of the outer rotor, while the small one Outside diameter is chosen so that one of the two, facing or assigned Tei lvid of the outer circumference of the inner rotor is close to the wall of the interior when the direction of the small outer diameter with the direction of the exc entic offset of the two axes of rotation and that of the first and further.
- Control channels are essentially diametrically opposed to one another with respect to the small diameter and are axially offset.
- a firing pin which can be rotated by means of a drive is provided, with which a drilling tool can be coupled and which is guided axially displaceably in a firing pin guide provided on the front end face of the inner rotor, and that the firing pin is axially aligned with the flying piston and can be actuated by it.
- a Sc lag chisel device on the basis of this device or the method is characterized in that a firing pin is provided, into which a chisel can be inserted and which is guided axially displaceably in a firing pin guide provided on the front end face of the inner rotor, and in that the firing pin is axially open aligned the piston and actuated by this st.
- the rotary piston compressor principle on which this is based is known in particular from the extensive work of Wankel, who has proposed various types of rotary piston compressors. According to the invention, this principle is now modified so that it is suitable for generating the lifting movement of the flying piston, whereby not only a simple construction and drive, but also a largely vibration-damped suspension of the drive motor is possible, a bevel gear set or a self-aligning ball bearing being unnecessary compared to conventional rotary hammers .
- the construction made possible with a few components and a favorable arrangement of the same also results in simple assembly with small dimensions and low weight. Di e ⁇ flight length the flying piston is not tied to the stroke length of a crank mechanism. The impact energy is high due to the special design.
- the speed ratio between the inner and outer rotor is 1: 2
- the compression and the suction space are formed on diametrically opposite partial surfaces of the outer circumference of the inner rotor.
- the flying piston when the flying piston assumes its front end position facing the tool to be actuated, the cavity between the first and the second control channels is flowed through freely by the compressed air, thereby avoiding a Lee r current. and that * the movement of the flying piston is started by pushing the tool to be actuated into the cavity between the first and the further control channels.
- Another advantage is that on the return flight of the flying piston behind the other, i.e. rear
- Control channels an air cushion is formed by which the impact is damped.
- a favorable form of the inner rotor is such that the outer contour of the inner rotor cross section is symmetrical with its small and large outer diameter and consists of two There are circular sections whose radius of curvature corresponds approximately to the larger radius of curvature of the elliptical interior, which is based on the DKM 53 type from Wankel.
- the cavity of the inner rotor and the flying piston are zylindför ig, that the outer periphery of the outer rotor is circular, and that the electric motor used to generate the rotational movement is arranged parallel to the inner and outer rotor and that the drive via pulleys and belts , in particular toothed belts or Kei lri ppenri e s, or done via gears.
- the firing pin is held in a rotating driven drilling shaft.
- the drilling shaft can also be driven via a pulley and a belt or via gears by means of the electric motor.
- Fig. 1 shows a longitudinal section of a
- Fig. 2 shows a cross section of a
- Compressed air-piston actuation unit 3A and B position pictures of interior
- Fig. 4 is a hammer drill in longitudinal section with a
- Fig. 5 shows a cross section of the
- FIGS. The basic structure of a device and the operation for generating the compressed air eans of a rotary compressing unit 12 and operating a free piston 4 rect a Schlagvor ⁇ ', such as a percussion drill or a percussion bit 1 is illustrated to 3 in FIGS..
- Fig. 1 shows the rotary piston compression unit 1 as a compressed air flue actuator actuation unit with an external rotor 3, which has an eccentrically arranged interior 3.4 with the same elliptical cross section over its entire longitudinal extent, in which an internal rotor 2 is accommodated is.
- the inner rotor 2 has, for example, a cylindrical cavity 2.8, in which the flying piston 4 is displaceably guided to and fro.
- Compressed air-FlugkoIbenbet2011 supply unit located first control bore 2.1 is so far from the front end that the cavity 2.8 between the front and rear control bore 2.1 or 2.2 is free when the piston 4 is fully advanced, whereby an idle position is defined and an idle vision was is avoided.
- the outer cross-sectional contour of the inner rotor 2 has a large and a small outer diameter and is symmetrical to both, whereby it is composed of two identical circular sections, the radius of curvature of which is approximately adapted to the radius of curvature of the interior 3.4 of the outer rotor 3.
- the large diameter almost corresponds to the small diameter of the interior 3.4.
- the control bores 2.1 and 2.2 are diametrically opposite in the area of the small diameter, but axially offset in the front and rear area of the inner rotor 2. If control channels other than the control bores mentioned are provided, their openings are correspondingly arranged on the discharge or suction chamber.
- the outer rotor 3 and the inner rotor 2 have eccentric axes of rotation 3.5 and 2.9, respectively, about which they rotate in the same direction during operation at a speed ratio of 2: 1.
- the compressed air is alternately pressed into the compression chamber just facing Steuerboh tion and drives the piston 4 in the direction of the other control bore through which air is sucked in, whereby the desired reciprocation of the piston is achieved.
- the protected mode of action can be understood on the basis of the position pictures a to p shown in FIG. 3.
- the compressed air Flugko Ibenbetantriebei unit or Drehko Iben compaction unit 12 can be made of aluminum. With a so-called HART-COAT coating, it can be made wear-resistant and with a surface impregnation made of Teflon (PTFE), optimal dry lubrication can be achieved if excessive heating is prevented.
- PTFE Teflon
- the preferred rotary piston compression unit described above is based on the rotary piston system DKM 53 ("MondJungfer") proposed by Wankel.
- DKM 53 MondJungfer
- any other rotary piston compression system can also be used, as long as it alternately achieves a compression and suction effect on the radially and axially offset control bores.
- the cross-sectional shape of the cavity 2.8 in the inner rotor 2 need not be circular, but can have other geometric shapes, such as elliptical or polygonal.
- a fixed sleeve concentric with the axis of rotation 2.9 of the inner rotor, fitted into the cavity 2.8, can be provided in the rotating inner rotor 2, into which the front and rear control bores 2.1 and 2.2 coordinated bores are incorporated, which always coincide with the control bores when the strongest compression or suction state is reached.
- a moving sleeve can also be provided in the cavity 2.8, in which there are corresponding bores or openings which are connected to the suction space or the compression space.
- the described device in the form of the compressed air fl ight actuation unit with rotary piston compressor 12 is particularly suitable for
- FIGS. 4 and 5 An embodiment of a striking device 1 in the form of an electropneu atical hammer drill is shown in FIGS. 4 and 5.
- Rotary piston compression unit housed in a guide bush 5.1 a receiving device 5.
- a front or rear receptacle 5.2 and 5.3 for the outer rotor 3 are arranged at the front and rear of the guide bush 5.1, in which the outer rotor 3 is rotatably mounted by means of ball bearings 9, thermal expansion being taken into account.
- Front and rear pulley mounts 3.1 and 3.2 are provided for driving by means of belts and pulleys 3.3. Gears can also be used for the drive.
- a pulley, in particular toothed belt pulley 2.4, is also coupled to the inner rotor 2 via a shaft 2.3, so that this too can be driven from the outside.
- an electric motor 8 is provided, which is arranged in parallel next to the rotary piston compaction unit 12.
- the firing pin 11 provided with a tool holder into which a tool 7 can be inserted.
- the firing pin 11 is held in a rotationally driven drilling shaft 6, which can also be driven by the electric motor 8 via a pulley 6.1 and a belt 6.2.
- the firing pin 11 In the idle position, the firing pin 11 is pushed all the way forward. If the tool 7 is placed on a base, the firing pin 11 moves back and with it the flying piston 4 enters the cavity between the front and rear control bores 2.1 or 2.2, so that it is by means of the rotary piston compressor
- the firing pin 11 has an O-ring 10.
- Lock nuts 2.5 are screwed on behind the pulley 2.4 and on the firing pin guide.
- the device shown in Fig. 4 is accommodated in a housing, not shown, which is advantageously formed from two half-shells. Another, not shown, use of the compressed air flugko Ibenbet decisivi unit with
- Rotary piston compressors exist for a chisel device, in which there is also a firing pin in the front area, which receives the chisel. Except for the rotating drive of the drilling shaft, the structure corresponds essentially to the hammer drill described above. In both devices, firing pin 11 and flying piston 4 are axially aligned with one another.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Percussive Tools And Related Accessories (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4216071 | 1992-05-15 | ||
DE4216071A DE4216071C2 (de) | 1992-05-15 | 1992-05-15 | Schlagwerk für ein schlagend oder drehschlagend arbeitendes Werkzeug |
PCT/EP1993/001193 WO1993023211A1 (de) | 1992-05-15 | 1993-05-13 | Verfahren und vorrichtung zum betätigen eines schlagwerkzeuges mittels pressluft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0646056A1 true EP0646056A1 (de) | 1995-04-05 |
EP0646056B1 EP0646056B1 (de) | 1996-10-16 |
Family
ID=6458952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93909977A Expired - Lifetime EP0646056B1 (de) | 1992-05-15 | 1993-05-13 | Verfahren und vorrichtung zum betätigen eines schlagwerkzeuges mittels pressluft |
Country Status (7)
Country | Link |
---|---|
US (1) | US5769620A (de) |
EP (1) | EP0646056B1 (de) |
AT (1) | ATE144175T1 (de) |
AU (1) | AU4067993A (de) |
CA (1) | CA2135896A1 (de) |
DE (2) | DE4216071C2 (de) |
WO (1) | WO1993023211A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4216071C2 (de) * | 1992-05-15 | 1994-03-24 | Rolf Briem | Schlagwerk für ein schlagend oder drehschlagend arbeitendes Werkzeug |
WO1999056917A1 (de) * | 1998-05-05 | 1999-11-11 | Rolf Briem | Schlagwerk für ein schlagend oder drehschlagend arbeitendes werkzeug |
JP4200918B2 (ja) * | 2004-02-09 | 2008-12-24 | 日立工機株式会社 | 穿孔機 |
DE102008010100A1 (de) * | 2008-02-20 | 2009-08-27 | Robert Bosch Gmbh | Handwerkzeugmaschine |
US7937948B2 (en) * | 2009-09-23 | 2011-05-10 | Pioneer Energy, Inc. | Systems and methods for generating electricity from carbonaceous material with substantially no carbon dioxide emissions |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE302908C (de) * | ||||
DE358374C (de) * | 1916-07-15 | 1922-09-09 | James C Campbell | Drucklufthammer mit Luftverdichter |
DE439825C (de) * | 1925-09-06 | 1927-01-19 | Heinrich Haarer | Drucklufthammer mit umlaufendem Luftverdichter |
GB2084916A (en) * | 1980-10-08 | 1982-04-21 | Kango Electric Hammers Ltd | Improvements relating to percussive tools |
DE3405922A1 (de) * | 1984-02-18 | 1985-08-22 | Robert Bosch Gmbh, 7000 Stuttgart | Handwerkzeugmaschine, insbesondere bohr- oder schlaghammer |
DE3427342A1 (de) * | 1984-07-25 | 1986-01-30 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrhammer |
US4946355A (en) * | 1989-06-22 | 1990-08-07 | Old Russell A B | Orbital pump |
US5174388A (en) * | 1991-09-10 | 1992-12-29 | Williams Tunney E | Driver tool and method |
DE4216071C2 (de) * | 1992-05-15 | 1994-03-24 | Rolf Briem | Schlagwerk für ein schlagend oder drehschlagend arbeitendes Werkzeug |
-
1992
- 1992-05-15 DE DE4216071A patent/DE4216071C2/de not_active Expired - Fee Related
-
1993
- 1993-05-13 US US08/341,565 patent/US5769620A/en not_active Expired - Fee Related
- 1993-05-13 AU AU40679/93A patent/AU4067993A/en not_active Abandoned
- 1993-05-13 AT AT93909977T patent/ATE144175T1/de active
- 1993-05-13 CA CA002135896A patent/CA2135896A1/en not_active Abandoned
- 1993-05-13 DE DE59304209T patent/DE59304209D1/de not_active Expired - Fee Related
- 1993-05-13 EP EP93909977A patent/EP0646056B1/de not_active Expired - Lifetime
- 1993-05-13 WO PCT/EP1993/001193 patent/WO1993023211A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9323211A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4216071A1 (de) | 1993-11-18 |
DE59304209D1 (de) | 1996-11-21 |
US5769620A (en) | 1998-06-23 |
DE4216071C2 (de) | 1994-03-24 |
AU4067993A (en) | 1993-12-13 |
WO1993023211A1 (de) | 1993-11-25 |
CA2135896A1 (en) | 1993-11-25 |
ATE144175T1 (de) | 1996-11-15 |
EP0646056B1 (de) | 1996-10-16 |
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