EP0876880A2 - Appareil de forage et/ou percussion - Google Patents
Appareil de forage et/ou percussion Download PDFInfo
- Publication number
- EP0876880A2 EP0876880A2 EP98810142A EP98810142A EP0876880A2 EP 0876880 A2 EP0876880 A2 EP 0876880A2 EP 98810142 A EP98810142 A EP 98810142A EP 98810142 A EP98810142 A EP 98810142A EP 0876880 A2 EP0876880 A2 EP 0876880A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide tube
- air
- air passages
- machining direction
- piston
- 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
- 238000009527 percussion Methods 0.000 title 1
- 238000003754 machining Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 description 15
- 238000009423 ventilation Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
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
- B25D11/12—Means for driving the impulse member comprising a crank mechanism
- B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
-
- 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
- B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
Definitions
- the invention relates to a drilling and / or chiseling device according to the preamble of Claim 1.
- a chisel device which has a guide tube, in which a piston of a striking mechanism and one interacting with an anvil Rackets are axially displaceable. Between the piston and the racket the guide tube has several along one perpendicular to the machining direction radially extending air passages distributed over the circumference, those that can be axially reciprocated with respect to the guide tube Control bodies are covered.
- the control body is designed in the form of a sleeve and surrounds the guide tube.
- in the End region of the free end of the Control body has a plurality of radially extending ventilation openings, which in a plane perpendicular to the machining direction distributed over the circumference are.
- the ventilation openings are arranged on the control body such that they are in Coverage with the air vents can be brought when there is a back and forth of the control body relative to the guide tube.
- the cross-sectional area each ventilation hole corresponds essentially to half the cross-sectional area each air passage of the guide tube.
- the device To work on a surface, the device must be pressed against it.
- the device is supported by the chisel tool on the ground.
- the pressing process is followed by a shift of the chisel tool, the striker and of the control body against the processing direction in relation to the device.
- the control body occupies three different positions.
- the control body is opposite before pressing the device against the ground the guide tube in the machining direction so far that the air passages are not closed by the control body.
- the ventilation openings cover the air outlets of the guide tube.
- the interior of the guide tube between the Racket and the piston is ventilated via the small ventilation openings build a low pressure air cushion that is sufficient around the To move clubs in the machining direction at a low speed.
- the invention has for its object to provide a drilling and / or chisel device, that is economical and easy to manufacture, has a long lifespan and which prevents contamination of the interior of the guide tube.
- a drilling and / or chiseling device which has the features stated in the characterizing section of patent claim 1.
- the arrangement of further air passages makes it possible to make the cross-sectional areas of the individual air passages very small in order to effectively prevent the penetration of drilling dust or dirt particles into the interior of the guide tube. Little ventilation of the interior of the guide tube is also achieved via the further air passages when the device is in a first pressing position and the air passages are closed by the control element. Although the interior of the guide tube is poorly ventilated by the further air passages, it is possible to build up an air cushion through which the racket can be moved back and forth at a slow speed.
- the pressure of the air cushion that can be built up in the first pressing position essentially corresponds to half the pressure of that air cushion that can be built up in a second pressing position
- several further air passages are preferably distributed along the further planes over the circumference.
- the racket is slowly accelerated and when the device is lifted off the processed surface the speed at which the racket is moved back and forth is reduced.
- the further air outlets are advantageous evenly distributed over the respective circumference of the guide tube.
- Air outlets have the same cross-sections.
- a further reduction in the cross-sections of the air outlets and the others Air outlets can be achieved by opposing the Connect several additional levels along the processing direction to the first level where several other air outlets are distributed over the circumference. A closing of these further air passages in the other levels is also carried out by the control body which can be moved by the striking block.
- the drilling and / or chiseling device shown schematically in FIG. 1 has one Housing 1 with a handle 3, a switch 4, a tool holder 2 for a not shown tool and an electric cable 5, through which the device with a external power source is connectable.
- FIGS. 2 to 4 In the interior of the drilling and / or chiseling device is located according to FIGS. 2 to 4 extending parallel to the machining direction guide tube 9 with a in Machining direction pointing the first free end and the first free end opposite second free end.
- the piston 7 In the guide tube 9, the piston 7 is not one completely shown striking mechanism 6 axially displaceable.
- the piston 7 is connected via a bolt 8 to a connecting rod, which is the second free end of the guide tube 9 projects beyond the machining direction.
- the guide tube 9 has several radially extending air passages 10 and several radially extending further Air passages 11 arranged between the piston 7 and the racket 19 are and over which the pressure of the air cushion can be influenced.
- the air outlets 10 are along the circumference of a first plane E1 and the air passages 11 are along of the circumference of a further plane E2, which is counter to the machining direction is spaced from the first plane E1.
- the air passages 10 and the further air passages 11 are controlled by means of a control body opposite the guide tube 9 from the striker 17 the machining direction and a spring 12 in the machining direction.
- the striker 17 is guided in a striker guide 18, which is axially connected to the guide tube 9 communicates.
- the spring 12 surrounds the guide tube 9 on the outside and is supported on a stop edge of the housing 1 and one against Machining direction facing support surface of the switching sleeve 13.
- the control body is formed by a shift fork 15, a shift rod 14 and a shift sleeve 13.
- the shift fork 15 acts in the interior of the guide tube 9 the striker 17 together and interspersed with their opposing free Ends diametrically opposite openings 16 of the guide tube 9.
- Die Free ends of the shift fork 15 are in positive connection with the as Wire bracket trained shift rod 14.
- a portion of the shift rod 14 is semicircular shaped and protrudes into a circumferential recess in the switching sleeve 13. The two free ends of the shift rod 14 extend in the machining direction and positively embrace the two free ends of the shift fork 15.
- FIG. 2 shows the control body in its basic position.
- the device is not in a pressed position.
- the spaced A apart Air passages 10 and the further air passages 11 are open. Over all Air outlets 10, 11 provide such a strong ventilation of the interior of the Guide tube 9 reached so that the piston 7 does not build up an air cushion and the Racket 19 can move in the machining direction.
- Fig. 3 shows the control body in a first pressing position, when pressing of the device against the surface to be processed, not shown, for example is reached after half the pressing distance.
- the one that takes place during pressing Displacement of the striker 17 against the machining direction also causes Displacement of the control body in the same direction.
- the switching sleeve 13 of the Control body covers all air passages 10. Only the other air outlets 11 are open.
- An air cushion with a low pressure can be built up by the piston 7. The pressure of this air cushion is sufficient to slow the racket 19 To shift the speed in the machining direction.
- Fig. 4 shows the control body in a further pressing position, which after the complete pressing of the device against the surface to be worked becomes.
- the switching sleeve 13 of the control body covers all air passages 10 and all further air outlets 11.
- the interior of the guide tube 9 is no longer ventilated.
- An air cushion can be built up from the piston 7, with which the racket 19 can be moved at high speed in the machining direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19714288 | 1997-04-07 | ||
DE19714288A DE19714288A1 (de) | 1997-04-07 | 1997-04-07 | Bohr- und/oder Meisselgerät |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0876880A2 true EP0876880A2 (fr) | 1998-11-11 |
EP0876880A3 EP0876880A3 (fr) | 2002-11-27 |
EP0876880B1 EP0876880B1 (fr) | 2006-11-15 |
Family
ID=7825677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810142A Expired - Lifetime EP0876880B1 (fr) | 1997-04-07 | 1998-02-23 | Appareil de forage et/ou percussion |
Country Status (5)
Country | Link |
---|---|
US (1) | US5975217A (fr) |
EP (1) | EP0876880B1 (fr) |
JP (1) | JP4195119B2 (fr) |
CN (1) | CN1065165C (fr) |
DE (2) | DE19714288A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003045636A1 (fr) * | 2001-11-16 | 2003-06-05 | Robert Bosch Gmbh | Machine-outil a main pourvue d'un systeme de percussion pneumatique |
EP1368160B1 (fr) * | 2001-03-12 | 2004-10-20 | Wacker Construction Equipment AG | Outil de percussion a amortissement pneumatique a fonctionnement au ralenti commande par frequence de mouvements |
EP1754575A3 (fr) * | 2005-08-19 | 2007-07-04 | Makita Corporation | Outil à impact motorisé |
US9925653B2 (en) | 2013-07-05 | 2018-03-27 | Black & Decker Inc. | Hammer drill |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6309829B1 (en) * | 1997-05-27 | 2001-10-30 | Pe Corporation (Ny) | Length determination of nucleic acid repeat sequences by discontinuous primer extension |
GB9902793D0 (en) * | 1999-02-09 | 1999-03-31 | Black & Decker Inc | Rotary hammer |
GB9902789D0 (en) * | 1999-02-09 | 1999-03-31 | Black & Decker Inc | Rotary hammer |
DE19929183B4 (de) * | 1999-06-25 | 2004-07-29 | Wacker Construction Equipment Ag | Luftfederschlagwerk mit Hohl-Schlagkolben mit Leerlauföffnung |
DE19955412A1 (de) * | 1999-11-18 | 2001-05-23 | Hilti Ag | Bohr- und Meisselgerät |
DE10019071A1 (de) * | 2000-04-18 | 2001-10-25 | Hilti Ag | Elekrohandwerkzeuggerät mit Leerschlagabschaltung |
DE10033362A1 (de) * | 2000-07-08 | 2002-01-17 | Hilti Ag | Elektrohandwerkzeug mit Leerschlagabschaltung |
GB0109747D0 (en) | 2001-04-20 | 2001-06-13 | Black & Decker Inc | Hammer |
DE10121088A1 (de) * | 2001-04-28 | 2002-11-07 | Bosch Gmbh Robert | Bohr- und/oder Meißelhammer |
DE10145464C2 (de) | 2001-09-14 | 2003-08-28 | Wacker Construction Equipment | Bohr- und/oder Schlaghammer mit anpressdruckabhängiger Leerlaufsteuerung |
JP4016772B2 (ja) * | 2001-11-16 | 2007-12-05 | 日立工機株式会社 | ハンマドリル |
DE10333799B3 (de) * | 2003-07-24 | 2005-02-17 | Wacker Construction Equipment Ag | Hohlkolbenschlagwerk mit Luftausgleichs- und Leerlauföffnung |
JP4179159B2 (ja) * | 2003-12-18 | 2008-11-12 | 日立工機株式会社 | 打撃工具 |
DE502004011101D1 (de) * | 2004-06-18 | 2010-06-10 | Hilti Ag | Einrichtung zur Verbesserung des Abschaltverhaltens eines elektropneumatischen Abbaugeräts |
US7306048B2 (en) * | 2004-11-24 | 2007-12-11 | Hitachi Koki Co., Ltd. | Hammer drill having switching mechanism for switching operation modes |
DE102005028918A1 (de) * | 2005-06-22 | 2006-12-28 | Wacker Construction Equipment Ag | Bohr- und/oder Schlaghammer mit Leerlaufsteuerung |
DE102005036560A1 (de) * | 2005-08-03 | 2007-02-08 | Wacker Construction Equipment Ag | Bohr- und/oder Schlaghammer mit Linearantrieb und Luftkühlung |
JP4509890B2 (ja) * | 2005-08-19 | 2010-07-21 | 株式会社マキタ | 衝撃式作業工具 |
JP5041575B2 (ja) * | 2006-03-07 | 2012-10-03 | 日立工機株式会社 | 打撃工具 |
DE102007000081A1 (de) * | 2007-02-08 | 2008-08-21 | Hilti Ag | Handwerkzeugmaschine mit pneumatischem Schlagwerk |
JP4965333B2 (ja) * | 2007-05-14 | 2012-07-04 | 株式会社マキタ | 打撃工具 |
US8485274B2 (en) * | 2007-05-14 | 2013-07-16 | Makita Corporation | Impact tool |
JP4965334B2 (ja) * | 2007-05-14 | 2012-07-04 | 株式会社マキタ | 打撃工具 |
JP4889564B2 (ja) * | 2007-05-14 | 2012-03-07 | 株式会社マキタ | 打撃工具 |
US8534527B2 (en) * | 2008-04-03 | 2013-09-17 | Black & Decker Inc. | Cordless framing nailer |
US9216502B2 (en) | 2008-04-03 | 2015-12-22 | Black & Decker Inc. | Multi-stranded return spring for fastening tool |
DE102008064221B4 (de) * | 2008-12-22 | 2016-03-17 | Koki Technik Transmission Systems Gmbh | Schaltgabel |
US8636081B2 (en) | 2011-12-15 | 2014-01-28 | Milwaukee Electric Tool Corporation | Rotary hammer |
JP5518617B2 (ja) * | 2010-08-02 | 2014-06-11 | 株式会社マキタ | 打撃工具 |
DE102010062874A1 (de) * | 2010-12-13 | 2012-06-14 | Hilti Aktiengesellschaft | Handwerkzeugmaschine |
US8393409B2 (en) * | 2010-12-29 | 2013-03-12 | Ortho Technologies, Llc | Electric motor driven tool for orthopedic impacting |
JP6229956B2 (ja) | 2010-12-29 | 2017-11-15 | メディカル エンタープライゼス, エルエルシー | 整形外科用衝撃を付与する電気モータ駆動式器具 |
US8695726B2 (en) | 2010-12-29 | 2014-04-15 | Medical Enterprises LLC | Electric motor driven tool for orthopedic impacting |
US9308636B2 (en) | 2012-02-03 | 2016-04-12 | Milwaukee Electric Tool Corporation | Rotary hammer with vibration dampening |
DE102012209020A1 (de) * | 2012-05-29 | 2013-12-05 | Robert Bosch Gmbh | Handwerkzeugmaschinenschlagwerk |
US9346158B2 (en) | 2012-09-20 | 2016-05-24 | Black & Decker Inc. | Magnetic profile lifter |
US9399281B2 (en) | 2012-09-20 | 2016-07-26 | Black & Decker Inc. | Stall release lever for fastening tool |
EP2857150A1 (fr) * | 2013-10-03 | 2015-04-08 | HILTI Aktiengesellschaft | Machine-outil manuelle |
WO2015133198A1 (fr) * | 2014-03-03 | 2015-09-11 | 日立工機株式会社 | Outil de frappe |
EP3181300A1 (fr) * | 2015-12-15 | 2017-06-21 | HILTI Aktiengesellschaft | Machine-outil portative a percussion |
CN106895131B (zh) * | 2015-12-21 | 2024-01-23 | 博世电动工具(中国)有限公司 | 密封通气装置及包括其的设备 |
WO2020056654A1 (fr) * | 2018-09-20 | 2020-03-26 | 博世电动工具(中国)有限公司 | Machine-outil à percussion |
CN219337617U (zh) * | 2020-04-02 | 2023-07-14 | 米沃奇电动工具公司 | 旋转锤 |
EP4382254A1 (fr) | 2022-12-07 | 2024-06-12 | Hilti Aktiengesellschaft | Mécanisme de percussion pour un outil électrique portatif et outil électrique portatif |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5111890A (en) * | 1988-08-02 | 1992-05-12 | Robert Bosch Gmbh | Hammer drill |
US5456324A (en) * | 1993-11-26 | 1995-10-10 | Hitachi Koki Company Limited | Percussion hammer |
EP0759341A2 (fr) * | 1995-08-18 | 1997-02-26 | Makita Corporation | Marteau perforateur avec mécanisme de prévention des frappes à vide |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2580158A (en) * | 1948-12-23 | 1951-12-25 | Dean William Henry | Power-operated portable tool |
US4113035A (en) * | 1977-04-21 | 1978-09-12 | Licentia Patent-Verwaltungs-G.M.B.H. | Hammer drill with drive and percussion elements accommodated in a cylinder |
EP0052507B1 (fr) * | 1980-11-18 | 1985-02-13 | Black & Decker Inc. | Perceuse à percussion |
DE3304916A1 (de) * | 1983-02-12 | 1984-08-16 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrhammer |
DE3932134A1 (de) * | 1989-09-27 | 1991-04-04 | Bosch Gmbh Robert | Hammer mit luftfederschlagwerk |
DE4239294A1 (de) * | 1992-11-23 | 1994-05-26 | Black & Decker Inc | Bohrhammer mit pneumatischem Schlagwerk |
JP3292972B2 (ja) * | 1996-03-29 | 2002-06-17 | 株式会社マキタ | 打撃工具 |
-
1997
- 1997-04-07 DE DE19714288A patent/DE19714288A1/de not_active Withdrawn
-
1998
- 1998-02-23 EP EP98810142A patent/EP0876880B1/fr not_active Expired - Lifetime
- 1998-02-23 DE DE59813801T patent/DE59813801D1/de not_active Expired - Lifetime
- 1998-04-06 JP JP09352798A patent/JP4195119B2/ja not_active Expired - Lifetime
- 1998-04-06 CN CN98106333A patent/CN1065165C/zh not_active Expired - Fee Related
- 1998-04-07 US US09/056,588 patent/US5975217A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5111890A (en) * | 1988-08-02 | 1992-05-12 | Robert Bosch Gmbh | Hammer drill |
US5456324A (en) * | 1993-11-26 | 1995-10-10 | Hitachi Koki Company Limited | Percussion hammer |
EP0759341A2 (fr) * | 1995-08-18 | 1997-02-26 | Makita Corporation | Marteau perforateur avec mécanisme de prévention des frappes à vide |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1368160B1 (fr) * | 2001-03-12 | 2004-10-20 | Wacker Construction Equipment AG | Outil de percussion a amortissement pneumatique a fonctionnement au ralenti commande par frequence de mouvements |
WO2003045636A1 (fr) * | 2001-11-16 | 2003-06-05 | Robert Bosch Gmbh | Machine-outil a main pourvue d'un systeme de percussion pneumatique |
US7040413B2 (en) | 2001-11-16 | 2006-05-09 | Robert Bosch Gmbh | Hand power tool with a pneumatic striking mechanism |
EP1754575A3 (fr) * | 2005-08-19 | 2007-07-04 | Makita Corporation | Outil à impact motorisé |
US7383895B2 (en) | 2005-08-19 | 2008-06-10 | Makita Corporation | Impact power tool |
US9925653B2 (en) | 2013-07-05 | 2018-03-27 | Black & Decker Inc. | Hammer drill |
Also Published As
Publication number | Publication date |
---|---|
DE19714288A1 (de) | 1998-10-08 |
US5975217A (en) | 1999-11-02 |
JPH10309679A (ja) | 1998-11-24 |
JP4195119B2 (ja) | 2008-12-10 |
CN1197716A (zh) | 1998-11-04 |
EP0876880A3 (fr) | 2002-11-27 |
DE59813801D1 (de) | 2006-12-28 |
EP0876880B1 (fr) | 2006-11-15 |
CN1065165C (zh) | 2001-05-02 |
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